diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/h263.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/h263.c | 6311 |
1 files changed, 0 insertions, 6311 deletions
diff --git a/contrib/ffmpeg/libavcodec/h263.c b/contrib/ffmpeg/libavcodec/h263.c deleted file mode 100644 index 4db89e970..000000000 --- a/contrib/ffmpeg/libavcodec/h263.c +++ /dev/null @@ -1,6311 +0,0 @@ -/* - * H263/MPEG4 backend for ffmpeg encoder and decoder - * Copyright (c) 2000,2001 Fabrice Bellard. - * H263+ support. - * Copyright (c) 2001 Juan J. Sierralta P. - * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - * ac prediction encoding, b-frame support, error resilience, optimizations, - * qpel decoding, gmc decoding, interlaced decoding, - * by Michael Niedermayer <michaelni@gmx.at> - */ - -/** - * @file h263.c - * h263/mpeg4 codec. - */ - -//#define DEBUG -#include <limits.h> - -#include "common.h" -#include "dsputil.h" -#include "avcodec.h" -#include "mpegvideo.h" -#include "h263data.h" -#include "mpeg4data.h" - -//#undef NDEBUG -//#include <assert.h> - -#define INTRA_MCBPC_VLC_BITS 6 -#define INTER_MCBPC_VLC_BITS 7 -#define CBPY_VLC_BITS 6 -#define MV_VLC_BITS 9 -#define DC_VLC_BITS 9 -#define SPRITE_TRAJ_VLC_BITS 6 -#define MB_TYPE_B_VLC_BITS 4 -#define TEX_VLC_BITS 9 -#define H263_MBTYPE_B_VLC_BITS 6 -#define CBPC_B_VLC_BITS 3 - -#ifdef CONFIG_ENCODERS -static void h263_encode_block(MpegEncContext * s, DCTELEM * block, - int n); -static void h263p_encode_umotion(MpegEncContext * s, int val); -static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, - int n, int dc, uint8_t *scan_table, - PutBitContext *dc_pb, PutBitContext *ac_pb); -static int mpeg4_get_block_length(MpegEncContext * s, DCTELEM * block, int n, int intra_dc, - uint8_t *scan_table); -#endif - -static int h263_decode_motion(MpegEncContext * s, int pred, int fcode); -static int h263p_decode_umotion(MpegEncContext * s, int pred); -static int h263_decode_block(MpegEncContext * s, DCTELEM * block, - int n, int coded); -static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr); -static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block, - int n, int coded, int intra, int rvlc); -#ifdef CONFIG_ENCODERS -static int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr); -static void mpeg4_encode_visual_object_header(MpegEncContext * s); -static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number); -#endif //CONFIG_ENCODERS -static void mpeg4_decode_sprite_trajectory(MpegEncContext * s, GetBitContext *gb); -static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, int level, int *dir_ptr, int encoding); - -#ifdef CONFIG_ENCODERS -static uint8_t uni_DCtab_lum_len[512]; -static uint8_t uni_DCtab_chrom_len[512]; -static uint16_t uni_DCtab_lum_bits[512]; -static uint16_t uni_DCtab_chrom_bits[512]; - -static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1]; -static uint8_t fcode_tab[MAX_MV*2+1]; -static uint8_t umv_fcode_tab[MAX_MV*2+1]; - -static uint32_t uni_mpeg4_intra_rl_bits[64*64*2*2]; -static uint8_t uni_mpeg4_intra_rl_len [64*64*2*2]; -static uint32_t uni_mpeg4_inter_rl_bits[64*64*2*2]; -static uint8_t uni_mpeg4_inter_rl_len [64*64*2*2]; -static uint8_t uni_h263_intra_aic_rl_len [64*64*2*2]; -static uint8_t uni_h263_inter_rl_len [64*64*2*2]; -//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level)) -//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64) -#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level)) - -/* mpeg4 -inter -max level: 24/6 -max run: 53/63 - -intra -max level: 53/16 -max run: 29/41 -*/ -#endif - -static uint8_t static_rl_table_store[5][2][2*MAX_RUN + MAX_LEVEL + 3]; - -#if 0 //3IV1 is quite rare and it slows things down a tiny bit -#define IS_3IV1 s->codec_tag == ff_get_fourcc("3IV1") -#else -#define IS_3IV1 0 -#endif - -int h263_get_picture_format(int width, int height) -{ - int format; - - if (width == 128 && height == 96) - format = 1; - else if (width == 176 && height == 144) - format = 2; - else if (width == 352 && height == 288) - format = 3; - else if (width == 704 && height == 576) - format = 4; - else if (width == 1408 && height == 1152) - format = 5; - else - format = 7; - return format; -} - -#ifdef CONFIG_ENCODERS - -static void aspect_to_info(MpegEncContext * s, AVRational aspect){ - int i; - - if(aspect.num==0) aspect= (AVRational){1,1}; - - for(i=1; i<6; i++){ - if(av_cmp_q(pixel_aspect[i], aspect) == 0){ - s->aspect_ratio_info=i; - return; - } - } - - s->aspect_ratio_info= FF_ASPECT_EXTENDED; -} - -void ff_flv_encode_picture_header(MpegEncContext * s, int picture_number) -{ - int format; - - align_put_bits(&s->pb); - - put_bits(&s->pb, 17, 1); - put_bits(&s->pb, 5, (s->h263_flv-1)); /* 0: h263 escape codes 1: 11-bit escape codes */ - put_bits(&s->pb, 8, (((int64_t)s->picture_number * 30 * s->avctx->time_base.num) / //FIXME use timestamp - s->avctx->time_base.den) & 0xff); /* TemporalReference */ - if (s->width == 352 && s->height == 288) - format = 2; - else if (s->width == 176 && s->height == 144) - format = 3; - else if (s->width == 128 && s->height == 96) - format = 4; - else if (s->width == 320 && s->height == 240) - format = 5; - else if (s->width == 160 && s->height == 120) - format = 6; - else if (s->width <= 255 && s->height <= 255) - format = 0; /* use 1 byte width & height */ - else - format = 1; /* use 2 bytes width & height */ - put_bits(&s->pb, 3, format); /* PictureSize */ - if (format == 0) { - put_bits(&s->pb, 8, s->width); - put_bits(&s->pb, 8, s->height); - } else if (format == 1) { - put_bits(&s->pb, 16, s->width); - put_bits(&s->pb, 16, s->height); - } - put_bits(&s->pb, 2, s->pict_type == P_TYPE); /* PictureType */ - put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */ - put_bits(&s->pb, 5, s->qscale); /* Quantizer */ - put_bits(&s->pb, 1, 0); /* ExtraInformation */ - - if(s->h263_aic){ - s->y_dc_scale_table= - s->c_dc_scale_table= ff_aic_dc_scale_table; - }else{ - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; - } -} - -void h263_encode_picture_header(MpegEncContext * s, int picture_number) -{ - int format, coded_frame_rate, coded_frame_rate_base, i, temp_ref; - int best_clock_code=1; - int best_divisor=60; - int best_error= INT_MAX; - - if(s->h263_plus){ - for(i=0; i<2; i++){ - int div, error; - div= (s->avctx->time_base.num*1800000LL + 500LL*s->avctx->time_base.den) / ((1000LL+i)*s->avctx->time_base.den); - div= av_clip(1, div, 127); - error= FFABS(s->avctx->time_base.num*1800000LL - (1000LL+i)*s->avctx->time_base.den*div); - if(error < best_error){ - best_error= error; - best_divisor= div; - best_clock_code= i; - } - } - } - s->custom_pcf= best_clock_code!=1 || best_divisor!=60; - coded_frame_rate= 1800000; - coded_frame_rate_base= (1000+best_clock_code)*best_divisor; - - align_put_bits(&s->pb); - - /* Update the pointer to last GOB */ - s->ptr_lastgob = pbBufPtr(&s->pb); - put_bits(&s->pb, 22, 0x20); /* PSC */ - temp_ref= s->picture_number * (int64_t)coded_frame_rate * s->avctx->time_base.num / //FIXME use timestamp - (coded_frame_rate_base * (int64_t)s->avctx->time_base.den); - put_bits(&s->pb, 8, temp_ref & 0xff); /* TemporalReference */ - - put_bits(&s->pb, 1, 1); /* marker */ - put_bits(&s->pb, 1, 0); /* h263 id */ - put_bits(&s->pb, 1, 0); /* split screen off */ - put_bits(&s->pb, 1, 0); /* camera off */ - put_bits(&s->pb, 1, 0); /* freeze picture release off */ - - format = h263_get_picture_format(s->width, s->height); - if (!s->h263_plus) { - /* H.263v1 */ - put_bits(&s->pb, 3, format); - put_bits(&s->pb, 1, (s->pict_type == P_TYPE)); - /* By now UMV IS DISABLED ON H.263v1, since the restrictions - of H.263v1 UMV implies to check the predicted MV after - calculation of the current MB to see if we're on the limits */ - put_bits(&s->pb, 1, 0); /* Unrestricted Motion Vector: off */ - put_bits(&s->pb, 1, 0); /* SAC: off */ - put_bits(&s->pb, 1, s->obmc); /* Advanced Prediction */ - put_bits(&s->pb, 1, 0); /* only I/P frames, no PB frame */ - put_bits(&s->pb, 5, s->qscale); - put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */ - } else { - int ufep=1; - /* H.263v2 */ - /* H.263 Plus PTYPE */ - - put_bits(&s->pb, 3, 7); - put_bits(&s->pb,3,ufep); /* Update Full Extended PTYPE */ - if (format == 7) - put_bits(&s->pb,3,6); /* Custom Source Format */ - else - put_bits(&s->pb, 3, format); - - put_bits(&s->pb,1, s->custom_pcf); - put_bits(&s->pb,1, s->umvplus); /* Unrestricted Motion Vector */ - put_bits(&s->pb,1,0); /* SAC: off */ - put_bits(&s->pb,1,s->obmc); /* Advanced Prediction Mode */ - put_bits(&s->pb,1,s->h263_aic); /* Advanced Intra Coding */ - put_bits(&s->pb,1,s->loop_filter); /* Deblocking Filter */ - put_bits(&s->pb,1,s->h263_slice_structured); /* Slice Structured */ - put_bits(&s->pb,1,0); /* Reference Picture Selection: off */ - put_bits(&s->pb,1,0); /* Independent Segment Decoding: off */ - put_bits(&s->pb,1,s->alt_inter_vlc); /* Alternative Inter VLC */ - put_bits(&s->pb,1,s->modified_quant); /* Modified Quantization: */ - put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ - put_bits(&s->pb,3,0); /* Reserved */ - - put_bits(&s->pb, 3, s->pict_type == P_TYPE); - - put_bits(&s->pb,1,0); /* Reference Picture Resampling: off */ - put_bits(&s->pb,1,0); /* Reduced-Resolution Update: off */ - put_bits(&s->pb,1,s->no_rounding); /* Rounding Type */ - put_bits(&s->pb,2,0); /* Reserved */ - put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ - - /* This should be here if PLUSPTYPE */ - put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */ - - if (format == 7) { - /* Custom Picture Format (CPFMT) */ - aspect_to_info(s, s->avctx->sample_aspect_ratio); - - put_bits(&s->pb,4,s->aspect_ratio_info); - put_bits(&s->pb,9,(s->width >> 2) - 1); - put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ - put_bits(&s->pb,9,(s->height >> 2)); - if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){ - put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num); - put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den); - } - } - if(s->custom_pcf){ - if(ufep){ - put_bits(&s->pb, 1, best_clock_code); - put_bits(&s->pb, 7, best_divisor); - } - put_bits(&s->pb, 2, (temp_ref>>8)&3); - } - - /* Unlimited Unrestricted Motion Vectors Indicator (UUI) */ - if (s->umvplus) -// put_bits(&s->pb,1,1); /* Limited according tables of Annex D */ -//FIXME check actual requested range - put_bits(&s->pb,2,1); /* unlimited */ - if(s->h263_slice_structured) - put_bits(&s->pb,2,0); /* no weird submodes */ - - put_bits(&s->pb, 5, s->qscale); - } - - put_bits(&s->pb, 1, 0); /* no PEI */ - - if(s->h263_slice_structured){ - put_bits(&s->pb, 1, 1); - - assert(s->mb_x == 0 && s->mb_y == 0); - ff_h263_encode_mba(s); - - put_bits(&s->pb, 1, 1); - } - - if(s->h263_aic){ - s->y_dc_scale_table= - s->c_dc_scale_table= ff_aic_dc_scale_table; - }else{ - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; - } -} - -/** - * Encodes a group of blocks header. - */ -void h263_encode_gob_header(MpegEncContext * s, int mb_line) -{ - put_bits(&s->pb, 17, 1); /* GBSC */ - - if(s->h263_slice_structured){ - put_bits(&s->pb, 1, 1); - - ff_h263_encode_mba(s); - - if(s->mb_num > 1583) - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 5, s->qscale); /* GQUANT */ - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 2, s->pict_type == I_TYPE); /* GFID */ - }else{ - int gob_number= mb_line / s->gob_index; - - put_bits(&s->pb, 5, gob_number); /* GN */ - put_bits(&s->pb, 2, s->pict_type == I_TYPE); /* GFID */ - put_bits(&s->pb, 5, s->qscale); /* GQUANT */ - } -} - -static inline int get_block_rate(MpegEncContext * s, DCTELEM block[64], int block_last_index, uint8_t scantable[64]){ - int last=0; - int j; - int rate=0; - - for(j=1; j<=block_last_index; j++){ - const int index= scantable[j]; - int level= block[index]; - if(level){ - level+= 64; - if((level&(~127)) == 0){ - if(j<block_last_index) rate+= s->intra_ac_vlc_length [UNI_AC_ENC_INDEX(j-last-1, level)]; - else rate+= s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j-last-1, level)]; - }else - rate += s->ac_esc_length; - level-= 64; - - last= j; - } - } - - return rate; -} - -static inline int decide_ac_pred(MpegEncContext * s, DCTELEM block[6][64], int dir[6], uint8_t *st[6], int zigzag_last_index[6]) -{ - int score= 0; - int i, n; - int8_t * const qscale_table= s->current_picture.qscale_table; - - memcpy(zigzag_last_index, s->block_last_index, sizeof(int)*6); - - for(n=0; n<6; n++){ - int16_t *ac_val, *ac_val1; - - score -= get_block_rate(s, block[n], s->block_last_index[n], s->intra_scantable.permutated); - - ac_val = s->ac_val[0][0] + s->block_index[n] * 16; - ac_val1= ac_val; - if(dir[n]){ - const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride; - /* top prediction */ - ac_val-= s->block_wrap[n]*16; - if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){ - /* same qscale */ - for(i=1; i<8; i++){ - const int level= block[n][s->dsp.idct_permutation[i ]]; - block[n][s->dsp.idct_permutation[i ]] = level - ac_val[i+8]; - ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]]; - ac_val1[i+8]= level; - } - }else{ - /* different qscale, we must rescale */ - for(i=1; i<8; i++){ - const int level= block[n][s->dsp.idct_permutation[i ]]; - block[n][s->dsp.idct_permutation[i ]] = level - ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale); - ac_val1[i ]= block[n][s->dsp.idct_permutation[i<<3]]; - ac_val1[i+8]= level; - } - } - st[n]= s->intra_h_scantable.permutated; - }else{ - const int xy= s->mb_x-1 + s->mb_y*s->mb_stride; - /* left prediction */ - ac_val-= 16; - if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){ - /* same qscale */ - for(i=1; i<8; i++){ - const int level= block[n][s->dsp.idct_permutation[i<<3]]; - block[n][s->dsp.idct_permutation[i<<3]]= level - ac_val[i]; - ac_val1[i ]= level; - ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]]; - } - }else{ - /* different qscale, we must rescale */ - for(i=1; i<8; i++){ - const int level= block[n][s->dsp.idct_permutation[i<<3]]; - block[n][s->dsp.idct_permutation[i<<3]]= level - ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale); - ac_val1[i ]= level; - ac_val1[i+8]= block[n][s->dsp.idct_permutation[i ]]; - } - } - st[n]= s->intra_v_scantable.permutated; - } - - for(i=63; i>0; i--) //FIXME optimize - if(block[n][ st[n][i] ]) break; - s->block_last_index[n]= i; - - score += get_block_rate(s, block[n], s->block_last_index[n], st[n]); - } - - return score < 0; -} - -static inline void restore_ac_coeffs(MpegEncContext * s, DCTELEM block[6][64], int dir[6], uint8_t *st[6], int zigzag_last_index[6]) -{ - int i, n; - memcpy(s->block_last_index, zigzag_last_index, sizeof(int)*6); - - for(n=0; n<6; n++){ - int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16; - - st[n]= s->intra_scantable.permutated; - if(dir[n]){ - /* top prediction */ - for(i=1; i<8; i++){ - block[n][s->dsp.idct_permutation[i ]] = ac_val[i+8]; - } - }else{ - /* left prediction */ - for(i=1; i<8; i++){ - block[n][s->dsp.idct_permutation[i<<3]]= ac_val[i ]; - } - } - } -} - -/** - * init s->current_picture.qscale_table from s->lambda_table - */ -static void ff_init_qscale_tab(MpegEncContext *s){ - int8_t * const qscale_table= s->current_picture.qscale_table; - int i; - - for(i=0; i<s->mb_num; i++){ - unsigned int lam= s->lambda_table[ s->mb_index2xy[i] ]; - int qp= (lam*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7); - qscale_table[ s->mb_index2xy[i] ]= av_clip(qp, s->avctx->qmin, s->avctx->qmax); - } -} - -/** - * modify qscale so that encoding is acually possible in h263 (limit difference to -2..2) - */ -void ff_clean_h263_qscales(MpegEncContext *s){ - int i; - int8_t * const qscale_table= s->current_picture.qscale_table; - - ff_init_qscale_tab(s); - - for(i=1; i<s->mb_num; i++){ - if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i-1] ] >2) - qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i-1] ]+2; - } - for(i=s->mb_num-2; i>=0; i--){ - if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i+1] ] >2) - qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i+1] ]+2; - } - - if(s->codec_id != CODEC_ID_H263P){ - for(i=1; i<s->mb_num; i++){ - int mb_xy= s->mb_index2xy[i]; - - if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTER4V)){ - s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_INTER; - } - } - } -} - -/** - * modify mb_type & qscale so that encoding is acually possible in mpeg4 - */ -void ff_clean_mpeg4_qscales(MpegEncContext *s){ - int i; - int8_t * const qscale_table= s->current_picture.qscale_table; - - ff_clean_h263_qscales(s); - - if(s->pict_type== B_TYPE){ - int odd=0; - /* ok, come on, this isn't funny anymore, there's more code for handling this mpeg4 mess than for the actual adaptive quantization */ - - for(i=0; i<s->mb_num; i++){ - int mb_xy= s->mb_index2xy[i]; - odd += qscale_table[mb_xy]&1; - } - - if(2*odd > s->mb_num) odd=1; - else odd=0; - - for(i=0; i<s->mb_num; i++){ - int mb_xy= s->mb_index2xy[i]; - if((qscale_table[mb_xy]&1) != odd) - qscale_table[mb_xy]++; - if(qscale_table[mb_xy] > 31) - qscale_table[mb_xy]= 31; - } - - for(i=1; i<s->mb_num; i++){ - int mb_xy= s->mb_index2xy[i]; - if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_DIRECT)){ - s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_BIDIR; - } - } - } -} - -#endif //CONFIG_ENCODERS - -#define tab_size ((signed)(sizeof(s->direct_scale_mv[0])/sizeof(int16_t))) -#define tab_bias (tab_size/2) - -void ff_mpeg4_init_direct_mv(MpegEncContext *s){ - int i; - for(i=0; i<tab_size; i++){ - s->direct_scale_mv[0][i] = (i-tab_bias)*s->pb_time/s->pp_time; - s->direct_scale_mv[1][i] = (i-tab_bias)*(s->pb_time-s->pp_time)/s->pp_time; - } -} - -static inline void ff_mpeg4_set_one_direct_mv(MpegEncContext *s, int mx, int my, int i){ - int xy= s->block_index[i]; - uint16_t time_pp= s->pp_time; - uint16_t time_pb= s->pb_time; - int p_mx, p_my; - - p_mx= s->next_picture.motion_val[0][xy][0]; - if((unsigned)(p_mx + tab_bias) < tab_size){ - s->mv[0][i][0] = s->direct_scale_mv[0][p_mx + tab_bias] + mx; - s->mv[1][i][0] = mx ? s->mv[0][i][0] - p_mx - : s->direct_scale_mv[1][p_mx + tab_bias]; - }else{ - s->mv[0][i][0] = p_mx*time_pb/time_pp + mx; - s->mv[1][i][0] = mx ? s->mv[0][i][0] - p_mx - : p_mx*(time_pb - time_pp)/time_pp; - } - p_my= s->next_picture.motion_val[0][xy][1]; - if((unsigned)(p_my + tab_bias) < tab_size){ - s->mv[0][i][1] = s->direct_scale_mv[0][p_my + tab_bias] + my; - s->mv[1][i][1] = my ? s->mv[0][i][1] - p_my - : s->direct_scale_mv[1][p_my + tab_bias]; - }else{ - s->mv[0][i][1] = p_my*time_pb/time_pp + my; - s->mv[1][i][1] = my ? s->mv[0][i][1] - p_my - : p_my*(time_pb - time_pp)/time_pp; - } -} - -#undef tab_size -#undef tab_bias - -/** - * - * @return the mb_type - */ -int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my){ - const int mb_index= s->mb_x + s->mb_y*s->mb_stride; - const int colocated_mb_type= s->next_picture.mb_type[mb_index]; - uint16_t time_pp= s->pp_time; - uint16_t time_pb= s->pb_time; - int i; - - //FIXME avoid divides - // try special case with shifts for 1 and 3 B-frames? - - if(IS_8X8(colocated_mb_type)){ - s->mv_type = MV_TYPE_8X8; - for(i=0; i<4; i++){ - ff_mpeg4_set_one_direct_mv(s, mx, my, i); - } - return MB_TYPE_DIRECT2 | MB_TYPE_8x8 | MB_TYPE_L0L1; - } else if(IS_INTERLACED(colocated_mb_type)){ - s->mv_type = MV_TYPE_FIELD; - for(i=0; i<2; i++){ - int field_select= s->next_picture.ref_index[0][s->block_index[2*i]]; - s->field_select[0][i]= field_select; - s->field_select[1][i]= i; - if(s->top_field_first){ - time_pp= s->pp_field_time - field_select + i; - time_pb= s->pb_field_time - field_select + i; - }else{ - time_pp= s->pp_field_time + field_select - i; - time_pb= s->pb_field_time + field_select - i; - } - s->mv[0][i][0] = s->p_field_mv_table[i][0][mb_index][0]*time_pb/time_pp + mx; - s->mv[0][i][1] = s->p_field_mv_table[i][0][mb_index][1]*time_pb/time_pp + my; - s->mv[1][i][0] = mx ? s->mv[0][i][0] - s->p_field_mv_table[i][0][mb_index][0] - : s->p_field_mv_table[i][0][mb_index][0]*(time_pb - time_pp)/time_pp; - s->mv[1][i][1] = my ? s->mv[0][i][1] - s->p_field_mv_table[i][0][mb_index][1] - : s->p_field_mv_table[i][0][mb_index][1]*(time_pb - time_pp)/time_pp; - } - return MB_TYPE_DIRECT2 | MB_TYPE_16x8 | MB_TYPE_L0L1 | MB_TYPE_INTERLACED; - }else{ - ff_mpeg4_set_one_direct_mv(s, mx, my, 0); - s->mv[0][1][0] = s->mv[0][2][0] = s->mv[0][3][0] = s->mv[0][0][0]; - s->mv[0][1][1] = s->mv[0][2][1] = s->mv[0][3][1] = s->mv[0][0][1]; - s->mv[1][1][0] = s->mv[1][2][0] = s->mv[1][3][0] = s->mv[1][0][0]; - s->mv[1][1][1] = s->mv[1][2][1] = s->mv[1][3][1] = s->mv[1][0][1]; - if((s->avctx->workaround_bugs & FF_BUG_DIRECT_BLOCKSIZE) || !s->quarter_sample) - s->mv_type= MV_TYPE_16X16; - else - s->mv_type= MV_TYPE_8X8; - return MB_TYPE_DIRECT2 | MB_TYPE_16x16 | MB_TYPE_L0L1; //Note see prev line - } -} - -void ff_h263_update_motion_val(MpegEncContext * s){ - const int mb_xy = s->mb_y * s->mb_stride + s->mb_x; - //FIXME a lot of that is only needed for !low_delay - const int wrap = s->b8_stride; - const int xy = s->block_index[0]; - - s->current_picture.mbskip_table[mb_xy]= s->mb_skipped; - - if(s->mv_type != MV_TYPE_8X8){ - int motion_x, motion_y; - if (s->mb_intra) { - motion_x = 0; - motion_y = 0; - } else if (s->mv_type == MV_TYPE_16X16) { - motion_x = s->mv[0][0][0]; - motion_y = s->mv[0][0][1]; - } else /*if (s->mv_type == MV_TYPE_FIELD)*/ { - int i; - motion_x = s->mv[0][0][0] + s->mv[0][1][0]; - motion_y = s->mv[0][0][1] + s->mv[0][1][1]; - motion_x = (motion_x>>1) | (motion_x&1); - for(i=0; i<2; i++){ - s->p_field_mv_table[i][0][mb_xy][0]= s->mv[0][i][0]; - s->p_field_mv_table[i][0][mb_xy][1]= s->mv[0][i][1]; - } - s->current_picture.ref_index[0][xy ]= - s->current_picture.ref_index[0][xy + 1]= s->field_select[0][0]; - s->current_picture.ref_index[0][xy + wrap ]= - s->current_picture.ref_index[0][xy + wrap + 1]= s->field_select[0][1]; - } - - /* no update if 8X8 because it has been done during parsing */ - s->current_picture.motion_val[0][xy][0] = motion_x; - s->current_picture.motion_val[0][xy][1] = motion_y; - s->current_picture.motion_val[0][xy + 1][0] = motion_x; - s->current_picture.motion_val[0][xy + 1][1] = motion_y; - s->current_picture.motion_val[0][xy + wrap][0] = motion_x; - s->current_picture.motion_val[0][xy + wrap][1] = motion_y; - s->current_picture.motion_val[0][xy + 1 + wrap][0] = motion_x; - s->current_picture.motion_val[0][xy + 1 + wrap][1] = motion_y; - } - - if(s->encoding){ //FIXME encoding MUST be cleaned up - if (s->mv_type == MV_TYPE_8X8) - s->current_picture.mb_type[mb_xy]= MB_TYPE_L0 | MB_TYPE_8x8; - else if(s->mb_intra) - s->current_picture.mb_type[mb_xy]= MB_TYPE_INTRA; - else - s->current_picture.mb_type[mb_xy]= MB_TYPE_L0 | MB_TYPE_16x16; - } -} - -#ifdef CONFIG_ENCODERS - -static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code){ - int l, bit_size, code; - - if (val == 0) { - return mvtab[0][1]; - } else { - bit_size = f_code - 1; - /* modulo encoding */ - l= INT_BIT - 6 - bit_size; - val = (val<<l)>>l; - val--; - code = (val >> bit_size) + 1; - - return mvtab[code][1] + 1 + bit_size; - } -} - -static inline void ff_h263_encode_motion_vector(MpegEncContext * s, int x, int y, int f_code){ - if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){ - skip_put_bits(&s->pb, - h263_get_motion_length(s, x, f_code) - +h263_get_motion_length(s, y, f_code)); - }else{ - ff_h263_encode_motion(s, x, f_code); - ff_h263_encode_motion(s, y, f_code); - } -} - -static inline int get_p_cbp(MpegEncContext * s, - DCTELEM block[6][64], - int motion_x, int motion_y){ - int cbp, i; - - if(s->flags & CODEC_FLAG_CBP_RD){ - int best_cbpy_score= INT_MAX; - int best_cbpc_score= INT_MAX; - int cbpc = (-1), cbpy= (-1); - const int offset= (s->mv_type==MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0); - const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6); - - for(i=0; i<4; i++){ - int score= inter_MCBPC_bits[i + offset] * lambda; - if(i&1) score += s->coded_score[5]; - if(i&2) score += s->coded_score[4]; - - if(score < best_cbpc_score){ - best_cbpc_score= score; - cbpc= i; - } - } - - for(i=0; i<16; i++){ - int score= cbpy_tab[i ^ 0xF][1] * lambda; - if(i&1) score += s->coded_score[3]; - if(i&2) score += s->coded_score[2]; - if(i&4) score += s->coded_score[1]; - if(i&8) score += s->coded_score[0]; - - if(score < best_cbpy_score){ - best_cbpy_score= score; - cbpy= i; - } - } - cbp= cbpc + 4*cbpy; - if ((motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16){ - if(best_cbpy_score + best_cbpc_score + 2*lambda >= 0) - cbp= 0; - } - - for (i = 0; i < 6; i++) { - if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){ - s->block_last_index[i]= -1; - memset(s->block[i], 0, sizeof(DCTELEM)*64); - } - } - }else{ - cbp= 0; - for (i = 0; i < 6; i++) { - if (s->block_last_index[i] >= 0) - cbp |= 1 << (5 - i); - } - } - return cbp; -} - -static inline int get_b_cbp(MpegEncContext * s, DCTELEM block[6][64], - int motion_x, int motion_y, int mb_type){ - int cbp=0, i; - - if(s->flags & CODEC_FLAG_CBP_RD){ - int score=0; - const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6); - - for(i=0; i<6; i++){ - if(s->coded_score[i] < 0){ - score += s->coded_score[i]; - cbp |= 1 << (5 - i); - } - } - - if(cbp){ - int zero_score= -6; - if ((motion_x | motion_y | s->dquant | mb_type) == 0){ - zero_score-= 4; //2*MV + mb_type + cbp bit - } - - zero_score*= lambda; - if(zero_score <= score){ - cbp=0; - } - } - - for (i = 0; i < 6; i++) { - if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){ - s->block_last_index[i]= -1; - memset(s->block[i], 0, sizeof(DCTELEM)*64); - } - } - }else{ - for (i = 0; i < 6; i++) { - if (s->block_last_index[i] >= 0) - cbp |= 1 << (5 - i); - } - } - return cbp; -} - -static inline void mpeg4_encode_blocks(MpegEncContext * s, DCTELEM block[6][64], int intra_dc[6], - uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb){ - int i; - - if(scan_table){ - if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){ - for (i = 0; i < 6; i++) { - skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, intra_dc[i], scan_table[i])); - } - }else{ - /* encode each block */ - for (i = 0; i < 6; i++) { - mpeg4_encode_block(s, block[i], i, intra_dc[i], scan_table[i], dc_pb, ac_pb); - } - } - }else{ - if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){ - for (i = 0; i < 6; i++) { - skip_put_bits(&s->pb, mpeg4_get_block_length(s, block[i], i, 0, s->intra_scantable.permutated)); - } - }else{ - /* encode each block */ - for (i = 0; i < 6; i++) { - mpeg4_encode_block(s, block[i], i, 0, s->intra_scantable.permutated, dc_pb, ac_pb); - } - } - } -} - -void mpeg4_encode_mb(MpegEncContext * s, - DCTELEM block[6][64], - int motion_x, int motion_y) -{ - int cbpc, cbpy, pred_x, pred_y; - PutBitContext * const pb2 = s->data_partitioning ? &s->pb2 : &s->pb; - PutBitContext * const tex_pb = s->data_partitioning && s->pict_type!=B_TYPE ? &s->tex_pb : &s->pb; - PutBitContext * const dc_pb = s->data_partitioning && s->pict_type!=I_TYPE ? &s->pb2 : &s->pb; - const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0; - const int dquant_code[5]= {1,0,9,2,3}; - - // printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y); - if (!s->mb_intra) { - int i, cbp; - - if(s->pict_type==B_TYPE){ - static const int mb_type_table[8]= {-1, 2, 3, 1,-1,-1,-1, 0}; /* convert from mv_dir to type */ - int mb_type= mb_type_table[s->mv_dir]; - - if(s->mb_x==0){ - for(i=0; i<2; i++){ - s->last_mv[i][0][0]= - s->last_mv[i][0][1]= - s->last_mv[i][1][0]= - s->last_mv[i][1][1]= 0; - } - } - - assert(s->dquant>=-2 && s->dquant<=2); - assert((s->dquant&1)==0); - assert(mb_type>=0); - - /* nothing to do if this MB was skipped in the next P Frame */ - if(s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]){ //FIXME avoid DCT & ... - s->skip_count++; - s->mv[0][0][0]= - s->mv[0][0][1]= - s->mv[1][0][0]= - s->mv[1][0][1]= 0; - s->mv_dir= MV_DIR_FORWARD; //doesn't matter - s->qscale -= s->dquant; -// s->mb_skipped=1; - - return; - } - - cbp= get_b_cbp(s, block, motion_x, motion_y, mb_type); - - if ((cbp | motion_x | motion_y | mb_type) ==0) { - /* direct MB with MV={0,0} */ - assert(s->dquant==0); - - put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */ - - if(interleaved_stats){ - s->misc_bits++; - s->last_bits++; - } - s->skip_count++; - return; - } - - put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */ - put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ //FIXME merge - put_bits(&s->pb, mb_type+1, 1); // this table is so simple that we don't need it :) - if(cbp) put_bits(&s->pb, 6, cbp); - - if(cbp && mb_type){ - if(s->dquant) - put_bits(&s->pb, 2, (s->dquant>>2)+3); - else - put_bits(&s->pb, 1, 0); - }else - s->qscale -= s->dquant; - - if(!s->progressive_sequence){ - if(cbp) - put_bits(&s->pb, 1, s->interlaced_dct); - if(mb_type) // not direct mode - put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD); - } - - if(interleaved_stats){ - s->misc_bits+= get_bits_diff(s); - } - - if(mb_type == 0){ - assert(s->mv_dir & MV_DIRECT); - ff_h263_encode_motion_vector(s, motion_x, motion_y, 1); - s->b_count++; - s->f_count++; - }else{ - assert(mb_type > 0 && mb_type < 4); - if(s->mv_type != MV_TYPE_FIELD){ - if(s->mv_dir & MV_DIR_FORWARD){ - ff_h263_encode_motion_vector(s, s->mv[0][0][0] - s->last_mv[0][0][0], - s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code); - s->last_mv[0][0][0]= s->last_mv[0][1][0]= s->mv[0][0][0]; - s->last_mv[0][0][1]= s->last_mv[0][1][1]= s->mv[0][0][1]; - s->f_count++; - } - if(s->mv_dir & MV_DIR_BACKWARD){ - ff_h263_encode_motion_vector(s, s->mv[1][0][0] - s->last_mv[1][0][0], - s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code); - s->last_mv[1][0][0]= s->last_mv[1][1][0]= s->mv[1][0][0]; - s->last_mv[1][0][1]= s->last_mv[1][1][1]= s->mv[1][0][1]; - s->b_count++; - } - }else{ - if(s->mv_dir & MV_DIR_FORWARD){ - put_bits(&s->pb, 1, s->field_select[0][0]); - put_bits(&s->pb, 1, s->field_select[0][1]); - } - if(s->mv_dir & MV_DIR_BACKWARD){ - put_bits(&s->pb, 1, s->field_select[1][0]); - put_bits(&s->pb, 1, s->field_select[1][1]); - } - if(s->mv_dir & MV_DIR_FORWARD){ - for(i=0; i<2; i++){ - ff_h263_encode_motion_vector(s, s->mv[0][i][0] - s->last_mv[0][i][0] , - s->mv[0][i][1] - s->last_mv[0][i][1]/2, s->f_code); - s->last_mv[0][i][0]= s->mv[0][i][0]; - s->last_mv[0][i][1]= s->mv[0][i][1]*2; - } - s->f_count++; - } - if(s->mv_dir & MV_DIR_BACKWARD){ - for(i=0; i<2; i++){ - ff_h263_encode_motion_vector(s, s->mv[1][i][0] - s->last_mv[1][i][0] , - s->mv[1][i][1] - s->last_mv[1][i][1]/2, s->b_code); - s->last_mv[1][i][0]= s->mv[1][i][0]; - s->last_mv[1][i][1]= s->mv[1][i][1]*2; - } - s->b_count++; - } - } - } - - if(interleaved_stats){ - s->mv_bits+= get_bits_diff(s); - } - - mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb); - - if(interleaved_stats){ - s->p_tex_bits+= get_bits_diff(s); - } - - }else{ /* s->pict_type==B_TYPE */ - cbp= get_p_cbp(s, block, motion_x, motion_y); - - if ((cbp | motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16) { - /* check if the B frames can skip it too, as we must skip it if we skip here - why didn't they just compress the skip-mb bits instead of reusing them ?! */ - if(s->max_b_frames>0){ - int i; - int x,y, offset; - uint8_t *p_pic; - - x= s->mb_x*16; - y= s->mb_y*16; - if(x+16 > s->width) x= s->width-16; - if(y+16 > s->height) y= s->height-16; - - offset= x + y*s->linesize; - p_pic= s->new_picture.data[0] + offset; - - s->mb_skipped=1; - for(i=0; i<s->max_b_frames; i++){ - uint8_t *b_pic; - int diff; - Picture *pic= s->reordered_input_picture[i+1]; - - if(pic==NULL || pic->pict_type!=B_TYPE) break; - - b_pic= pic->data[0] + offset; - if(pic->type != FF_BUFFER_TYPE_SHARED) - b_pic+= INPLACE_OFFSET; - diff= s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16); - if(diff>s->qscale*70){ //FIXME check that 70 is optimal - s->mb_skipped=0; - break; - } - } - }else - s->mb_skipped=1; - - if(s->mb_skipped==1){ - /* skip macroblock */ - put_bits(&s->pb, 1, 1); - - if(interleaved_stats){ - s->misc_bits++; - s->last_bits++; - } - s->skip_count++; - - return; - } - } - - put_bits(&s->pb, 1, 0); /* mb coded */ - cbpc = cbp & 3; - cbpy = cbp >> 2; - cbpy ^= 0xf; - if(s->mv_type==MV_TYPE_16X16){ - if(s->dquant) cbpc+= 8; - put_bits(&s->pb, - inter_MCBPC_bits[cbpc], - inter_MCBPC_code[cbpc]); - - put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]); - if(s->dquant) - put_bits(pb2, 2, dquant_code[s->dquant+2]); - - if(!s->progressive_sequence){ - if(cbp) - put_bits(pb2, 1, s->interlaced_dct); - put_bits(pb2, 1, 0); - } - - if(interleaved_stats){ - s->misc_bits+= get_bits_diff(s); - } - - /* motion vectors: 16x16 mode */ - h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - - ff_h263_encode_motion_vector(s, motion_x - pred_x, - motion_y - pred_y, s->f_code); - }else if(s->mv_type==MV_TYPE_FIELD){ - if(s->dquant) cbpc+= 8; - put_bits(&s->pb, - inter_MCBPC_bits[cbpc], - inter_MCBPC_code[cbpc]); - - put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]); - if(s->dquant) - put_bits(pb2, 2, dquant_code[s->dquant+2]); - - assert(!s->progressive_sequence); - if(cbp) - put_bits(pb2, 1, s->interlaced_dct); - put_bits(pb2, 1, 1); - - if(interleaved_stats){ - s->misc_bits+= get_bits_diff(s); - } - - /* motion vectors: 16x8 interlaced mode */ - h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - pred_y /=2; - - put_bits(&s->pb, 1, s->field_select[0][0]); - put_bits(&s->pb, 1, s->field_select[0][1]); - - ff_h263_encode_motion_vector(s, s->mv[0][0][0] - pred_x, - s->mv[0][0][1] - pred_y, s->f_code); - ff_h263_encode_motion_vector(s, s->mv[0][1][0] - pred_x, - s->mv[0][1][1] - pred_y, s->f_code); - }else{ - assert(s->mv_type==MV_TYPE_8X8); - put_bits(&s->pb, - inter_MCBPC_bits[cbpc+16], - inter_MCBPC_code[cbpc+16]); - put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]); - - if(!s->progressive_sequence){ - if(cbp) - put_bits(pb2, 1, s->interlaced_dct); - } - - if(interleaved_stats){ - s->misc_bits+= get_bits_diff(s); - } - - for(i=0; i<4; i++){ - /* motion vectors: 8x8 mode*/ - h263_pred_motion(s, i, 0, &pred_x, &pred_y); - - ff_h263_encode_motion_vector(s, s->current_picture.motion_val[0][ s->block_index[i] ][0] - pred_x, - s->current_picture.motion_val[0][ s->block_index[i] ][1] - pred_y, s->f_code); - } - } - - if(interleaved_stats){ - s->mv_bits+= get_bits_diff(s); - } - - mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb); - - if(interleaved_stats){ - s->p_tex_bits+= get_bits_diff(s); - } - s->f_count++; - } - } else { - int cbp; - int dc_diff[6]; //dc values with the dc prediction subtracted - int dir[6]; //prediction direction - int zigzag_last_index[6]; - uint8_t *scan_table[6]; - int i; - - for(i=0; i<6; i++){ - dc_diff[i]= ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1); - } - - if(s->flags & CODEC_FLAG_AC_PRED){ - s->ac_pred= decide_ac_pred(s, block, dir, scan_table, zigzag_last_index); - if(!s->ac_pred) - restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index); - }else{ - for(i=0; i<6; i++) - scan_table[i]= s->intra_scantable.permutated; - } - - /* compute cbp */ - cbp = 0; - for (i = 0; i < 6; i++) { - if (s->block_last_index[i] >= 1) - cbp |= 1 << (5 - i); - } - - cbpc = cbp & 3; - if (s->pict_type == I_TYPE) { - if(s->dquant) cbpc+=4; - put_bits(&s->pb, - intra_MCBPC_bits[cbpc], - intra_MCBPC_code[cbpc]); - } else { - if(s->dquant) cbpc+=8; - put_bits(&s->pb, 1, 0); /* mb coded */ - put_bits(&s->pb, - inter_MCBPC_bits[cbpc + 4], - inter_MCBPC_code[cbpc + 4]); - } - put_bits(pb2, 1, s->ac_pred); - cbpy = cbp >> 2; - put_bits(pb2, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]); - if(s->dquant) - put_bits(dc_pb, 2, dquant_code[s->dquant+2]); - - if(!s->progressive_sequence){ - put_bits(dc_pb, 1, s->interlaced_dct); - } - - if(interleaved_stats){ - s->misc_bits+= get_bits_diff(s); - } - - mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb); - - if(interleaved_stats){ - s->i_tex_bits+= get_bits_diff(s); - } - s->i_count++; - - /* restore ac coeffs & last_index stuff if we messed them up with the prediction */ - if(s->ac_pred) - restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index); - } -} - -void h263_encode_mb(MpegEncContext * s, - DCTELEM block[6][64], - int motion_x, int motion_y) -{ - int cbpc, cbpy, i, cbp, pred_x, pred_y; - int16_t pred_dc; - int16_t rec_intradc[6]; - int16_t *dc_ptr[6]; - const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1); - const int dquant_code[5]= {1,0,9,2,3}; - - //printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y); - if (!s->mb_intra) { - /* compute cbp */ - cbp= get_p_cbp(s, block, motion_x, motion_y); - - if ((cbp | motion_x | motion_y | s->dquant | (s->mv_type - MV_TYPE_16X16)) == 0) { - /* skip macroblock */ - put_bits(&s->pb, 1, 1); - if(interleaved_stats){ - s->misc_bits++; - s->last_bits++; - } - s->skip_count++; - - return; - } - put_bits(&s->pb, 1, 0); /* mb coded */ - - cbpc = cbp & 3; - cbpy = cbp >> 2; - if(s->alt_inter_vlc==0 || cbpc!=3) - cbpy ^= 0xF; - if(s->dquant) cbpc+= 8; - if(s->mv_type==MV_TYPE_16X16){ - put_bits(&s->pb, - inter_MCBPC_bits[cbpc], - inter_MCBPC_code[cbpc]); - - put_bits(&s->pb, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]); - if(s->dquant) - put_bits(&s->pb, 2, dquant_code[s->dquant+2]); - - if(interleaved_stats){ - s->misc_bits+= get_bits_diff(s); - } - - /* motion vectors: 16x16 mode */ - h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - - if (!s->umvplus) { - ff_h263_encode_motion_vector(s, motion_x - pred_x, - motion_y - pred_y, 1); - } - else { - h263p_encode_umotion(s, motion_x - pred_x); - h263p_encode_umotion(s, motion_y - pred_y); - if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) - /* To prevent Start Code emulation */ - put_bits(&s->pb,1,1); - } - }else{ - put_bits(&s->pb, - inter_MCBPC_bits[cbpc+16], - inter_MCBPC_code[cbpc+16]); - put_bits(&s->pb, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]); - if(s->dquant) - put_bits(&s->pb, 2, dquant_code[s->dquant+2]); - - if(interleaved_stats){ - s->misc_bits+= get_bits_diff(s); - } - - for(i=0; i<4; i++){ - /* motion vectors: 8x8 mode*/ - h263_pred_motion(s, i, 0, &pred_x, &pred_y); - - motion_x= s->current_picture.motion_val[0][ s->block_index[i] ][0]; - motion_y= s->current_picture.motion_val[0][ s->block_index[i] ][1]; - if (!s->umvplus) { - ff_h263_encode_motion_vector(s, motion_x - pred_x, - motion_y - pred_y, 1); - } - else { - h263p_encode_umotion(s, motion_x - pred_x); - h263p_encode_umotion(s, motion_y - pred_y); - if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) - /* To prevent Start Code emulation */ - put_bits(&s->pb,1,1); - } - } - } - - if(interleaved_stats){ - s->mv_bits+= get_bits_diff(s); - } - } else { - assert(s->mb_intra); - - cbp = 0; - if (s->h263_aic) { - /* Predict DC */ - for(i=0; i<6; i++) { - int16_t level = block[i][0]; - int scale; - - if(i<4) scale= s->y_dc_scale; - else scale= s->c_dc_scale; - - pred_dc = h263_pred_dc(s, i, &dc_ptr[i]); - level -= pred_dc; - /* Quant */ - if (level >= 0) - level = (level + (scale>>1))/scale; - else - level = (level - (scale>>1))/scale; - - /* AIC can change CBP */ - if (level == 0 && s->block_last_index[i] == 0) - s->block_last_index[i] = -1; - - if(!s->modified_quant){ - if (level < -127) - level = -127; - else if (level > 127) - level = 127; - } - - block[i][0] = level; - /* Reconstruction */ - rec_intradc[i] = scale*level + pred_dc; - /* Oddify */ - rec_intradc[i] |= 1; - //if ((rec_intradc[i] % 2) == 0) - // rec_intradc[i]++; - /* Clipping */ - if (rec_intradc[i] < 0) - rec_intradc[i] = 0; - else if (rec_intradc[i] > 2047) - rec_intradc[i] = 2047; - - /* Update AC/DC tables */ - *dc_ptr[i] = rec_intradc[i]; - if (s->block_last_index[i] >= 0) - cbp |= 1 << (5 - i); - } - }else{ - for(i=0; i<6; i++) { - /* compute cbp */ - if (s->block_last_index[i] >= 1) - cbp |= 1 << (5 - i); - } - } - - cbpc = cbp & 3; - if (s->pict_type == I_TYPE) { - if(s->dquant) cbpc+=4; - put_bits(&s->pb, - intra_MCBPC_bits[cbpc], - intra_MCBPC_code[cbpc]); - } else { - if(s->dquant) cbpc+=8; - put_bits(&s->pb, 1, 0); /* mb coded */ - put_bits(&s->pb, - inter_MCBPC_bits[cbpc + 4], - inter_MCBPC_code[cbpc + 4]); - } - if (s->h263_aic) { - /* XXX: currently, we do not try to use ac prediction */ - put_bits(&s->pb, 1, 0); /* no AC prediction */ - } - cbpy = cbp >> 2; - put_bits(&s->pb, cbpy_tab[cbpy][1], cbpy_tab[cbpy][0]); - if(s->dquant) - put_bits(&s->pb, 2, dquant_code[s->dquant+2]); - - if(interleaved_stats){ - s->misc_bits+= get_bits_diff(s); - } - } - - for(i=0; i<6; i++) { - /* encode each block */ - h263_encode_block(s, block[i], i); - - /* Update INTRADC for decoding */ - if (s->h263_aic && s->mb_intra) { - block[i][0] = rec_intradc[i]; - - } - } - - if(interleaved_stats){ - if (!s->mb_intra) { - s->p_tex_bits+= get_bits_diff(s); - s->f_count++; - }else{ - s->i_tex_bits+= get_bits_diff(s); - s->i_count++; - } - } -} -#endif - -void ff_h263_loop_filter(MpegEncContext * s){ - int qp_c; - const int linesize = s->linesize; - const int uvlinesize= s->uvlinesize; - const int xy = s->mb_y * s->mb_stride + s->mb_x; - uint8_t *dest_y = s->dest[0]; - uint8_t *dest_cb= s->dest[1]; - uint8_t *dest_cr= s->dest[2]; - -// if(s->pict_type==B_TYPE && !s->readable) return; - - /* - Diag Top - Left Center - */ - if(!IS_SKIP(s->current_picture.mb_type[xy])){ - qp_c= s->qscale; - s->dsp.h263_v_loop_filter(dest_y+8*linesize , linesize, qp_c); - s->dsp.h263_v_loop_filter(dest_y+8*linesize+8, linesize, qp_c); - }else - qp_c= 0; - - if(s->mb_y){ - int qp_dt, qp_t, qp_tc; - - if(IS_SKIP(s->current_picture.mb_type[xy-s->mb_stride])) - qp_t=0; - else - qp_t= s->current_picture.qscale_table[xy-s->mb_stride]; - - if(qp_c) - qp_tc= qp_c; - else - qp_tc= qp_t; - - if(qp_tc){ - const int chroma_qp= s->chroma_qscale_table[qp_tc]; - s->dsp.h263_v_loop_filter(dest_y , linesize, qp_tc); - s->dsp.h263_v_loop_filter(dest_y+8, linesize, qp_tc); - - s->dsp.h263_v_loop_filter(dest_cb , uvlinesize, chroma_qp); - s->dsp.h263_v_loop_filter(dest_cr , uvlinesize, chroma_qp); - } - - if(qp_t) - s->dsp.h263_h_loop_filter(dest_y-8*linesize+8 , linesize, qp_t); - - if(s->mb_x){ - if(qp_t || IS_SKIP(s->current_picture.mb_type[xy-1-s->mb_stride])) - qp_dt= qp_t; - else - qp_dt= s->current_picture.qscale_table[xy-1-s->mb_stride]; - - if(qp_dt){ - const int chroma_qp= s->chroma_qscale_table[qp_dt]; - s->dsp.h263_h_loop_filter(dest_y -8*linesize , linesize, qp_dt); - s->dsp.h263_h_loop_filter(dest_cb-8*uvlinesize, uvlinesize, chroma_qp); - s->dsp.h263_h_loop_filter(dest_cr-8*uvlinesize, uvlinesize, chroma_qp); - } - } - } - - if(qp_c){ - s->dsp.h263_h_loop_filter(dest_y +8, linesize, qp_c); - if(s->mb_y + 1 == s->mb_height) - s->dsp.h263_h_loop_filter(dest_y+8*linesize+8, linesize, qp_c); - } - - if(s->mb_x){ - int qp_lc; - if(qp_c || IS_SKIP(s->current_picture.mb_type[xy-1])) - qp_lc= qp_c; - else - qp_lc= s->current_picture.qscale_table[xy-1]; - - if(qp_lc){ - s->dsp.h263_h_loop_filter(dest_y, linesize, qp_lc); - if(s->mb_y + 1 == s->mb_height){ - const int chroma_qp= s->chroma_qscale_table[qp_lc]; - s->dsp.h263_h_loop_filter(dest_y +8* linesize, linesize, qp_lc); - s->dsp.h263_h_loop_filter(dest_cb , uvlinesize, chroma_qp); - s->dsp.h263_h_loop_filter(dest_cr , uvlinesize, chroma_qp); - } - } - } -} - -#ifdef CONFIG_ENCODERS -static int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr) -{ - int x, y, wrap, a, c, pred_dc, scale; - int16_t *dc_val; - - /* find prediction */ - if (n < 4) { - x = 2 * s->mb_x + (n & 1); - y = 2 * s->mb_y + ((n & 2) >> 1); - wrap = s->b8_stride; - dc_val = s->dc_val[0]; - scale = s->y_dc_scale; - } else { - x = s->mb_x; - y = s->mb_y; - wrap = s->mb_stride; - dc_val = s->dc_val[n - 4 + 1]; - scale = s->c_dc_scale; - } - /* B C - * A X - */ - a = dc_val[(x - 1) + (y) * wrap]; - c = dc_val[(x) + (y - 1) * wrap]; - - /* No prediction outside GOB boundary */ - if(s->first_slice_line && n!=3){ - if(n!=2) c= 1024; - if(n!=1 && s->mb_x == s->resync_mb_x) a= 1024; - } - pred_dc = 1024; - /* just DC prediction */ - if (a != 1024 && c != 1024) - pred_dc = (a + c) >> 1; - else if (a != 1024) - pred_dc = a; - else - pred_dc = c; - - /* we assume pred is positive */ - //pred_dc = (pred_dc + (scale >> 1)) / scale; - *dc_val_ptr = &dc_val[x + y * wrap]; - return pred_dc; -} -#endif /* CONFIG_ENCODERS */ - -static void h263_pred_acdc(MpegEncContext * s, DCTELEM *block, int n) -{ - int x, y, wrap, a, c, pred_dc, scale, i; - int16_t *dc_val, *ac_val, *ac_val1; - - /* find prediction */ - if (n < 4) { - x = 2 * s->mb_x + (n & 1); - y = 2 * s->mb_y + (n>> 1); - wrap = s->b8_stride; - dc_val = s->dc_val[0]; - ac_val = s->ac_val[0][0]; - scale = s->y_dc_scale; - } else { - x = s->mb_x; - y = s->mb_y; - wrap = s->mb_stride; - dc_val = s->dc_val[n - 4 + 1]; - ac_val = s->ac_val[n - 4 + 1][0]; - scale = s->c_dc_scale; - } - - ac_val += ((y) * wrap + (x)) * 16; - ac_val1 = ac_val; - - /* B C - * A X - */ - a = dc_val[(x - 1) + (y) * wrap]; - c = dc_val[(x) + (y - 1) * wrap]; - - /* No prediction outside GOB boundary */ - if(s->first_slice_line && n!=3){ - if(n!=2) c= 1024; - if(n!=1 && s->mb_x == s->resync_mb_x) a= 1024; - } - - if (s->ac_pred) { - pred_dc = 1024; - if (s->h263_aic_dir) { - /* left prediction */ - if (a != 1024) { - ac_val -= 16; - for(i=1;i<8;i++) { - block[s->dsp.idct_permutation[i<<3]] += ac_val[i]; - } - pred_dc = a; - } - } else { - /* top prediction */ - if (c != 1024) { - ac_val -= 16 * wrap; - for(i=1;i<8;i++) { - block[s->dsp.idct_permutation[i ]] += ac_val[i + 8]; - } - pred_dc = c; - } - } - } else { - /* just DC prediction */ - if (a != 1024 && c != 1024) - pred_dc = (a + c) >> 1; - else if (a != 1024) - pred_dc = a; - else - pred_dc = c; - } - - /* we assume pred is positive */ - block[0]=block[0]*scale + pred_dc; - - if (block[0] < 0) - block[0] = 0; - else - block[0] |= 1; - - /* Update AC/DC tables */ - dc_val[(x) + (y) * wrap] = block[0]; - - /* left copy */ - for(i=1;i<8;i++) - ac_val1[i ] = block[s->dsp.idct_permutation[i<<3]]; - /* top copy */ - for(i=1;i<8;i++) - ac_val1[8 + i] = block[s->dsp.idct_permutation[i ]]; -} - -int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir, - int *px, int *py) -{ - int wrap; - int16_t *A, *B, *C, (*mot_val)[2]; - static const int off[4]= {2, 1, 1, -1}; - - wrap = s->b8_stride; - mot_val = s->current_picture.motion_val[dir] + s->block_index[block]; - - A = mot_val[ - 1]; - /* special case for first (slice) line */ - if (s->first_slice_line && block<3) { - // we can't just change some MVs to simulate that as we need them for the B frames (and ME) - // and if we ever support non rectangular objects than we need to do a few ifs here anyway :( - if(block==0){ //most common case - if(s->mb_x == s->resync_mb_x){ //rare - *px= *py = 0; - }else if(s->mb_x + 1 == s->resync_mb_x && s->h263_pred){ //rare - C = mot_val[off[block] - wrap]; - if(s->mb_x==0){ - *px = C[0]; - *py = C[1]; - }else{ - *px = mid_pred(A[0], 0, C[0]); - *py = mid_pred(A[1], 0, C[1]); - } - }else{ - *px = A[0]; - *py = A[1]; - } - }else if(block==1){ - if(s->mb_x + 1 == s->resync_mb_x && s->h263_pred){ //rare - C = mot_val[off[block] - wrap]; - *px = mid_pred(A[0], 0, C[0]); - *py = mid_pred(A[1], 0, C[1]); - }else{ - *px = A[0]; - *py = A[1]; - } - }else{ /* block==2*/ - B = mot_val[ - wrap]; - C = mot_val[off[block] - wrap]; - if(s->mb_x == s->resync_mb_x) //rare - A[0]=A[1]=0; - - *px = mid_pred(A[0], B[0], C[0]); - *py = mid_pred(A[1], B[1], C[1]); - } - } else { - B = mot_val[ - wrap]; - C = mot_val[off[block] - wrap]; - *px = mid_pred(A[0], B[0], C[0]); - *py = mid_pred(A[1], B[1], C[1]); - } - return *mot_val; -} - -#ifdef CONFIG_ENCODERS -void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code) -{ - int range, l, bit_size, sign, code, bits; - - if (val == 0) { - /* zero vector */ - code = 0; - put_bits(&s->pb, mvtab[code][1], mvtab[code][0]); - } else { - bit_size = f_code - 1; - range = 1 << bit_size; - /* modulo encoding */ - l= INT_BIT - 6 - bit_size; - val = (val<<l)>>l; - sign = val>>31; - val= (val^sign)-sign; - sign&=1; - - val--; - code = (val >> bit_size) + 1; - bits = val & (range - 1); - - put_bits(&s->pb, mvtab[code][1] + 1, (mvtab[code][0] << 1) | sign); - if (bit_size > 0) { - put_bits(&s->pb, bit_size, bits); - } - } -} - -/* Encode MV differences on H.263+ with Unrestricted MV mode */ -static void h263p_encode_umotion(MpegEncContext * s, int val) -{ - short sval = 0; - short i = 0; - short n_bits = 0; - short temp_val; - int code = 0; - int tcode; - - if ( val == 0) - put_bits(&s->pb, 1, 1); - else if (val == 1) - put_bits(&s->pb, 3, 0); - else if (val == -1) - put_bits(&s->pb, 3, 2); - else { - - sval = ((val < 0) ? (short)(-val):(short)val); - temp_val = sval; - - while (temp_val != 0) { - temp_val = temp_val >> 1; - n_bits++; - } - - i = n_bits - 1; - while (i > 0) { - tcode = (sval & (1 << (i-1))) >> (i-1); - tcode = (tcode << 1) | 1; - code = (code << 2) | tcode; - i--; - } - code = ((code << 1) | (val < 0)) << 1; - put_bits(&s->pb, (2*n_bits)+1, code); - //printf("\nVal = %d\tCode = %d", sval, code); - } -} - -static void init_mv_penalty_and_fcode(MpegEncContext *s) -{ - int f_code; - int mv; - - for(f_code=1; f_code<=MAX_FCODE; f_code++){ - for(mv=-MAX_MV; mv<=MAX_MV; mv++){ - int len; - - if(mv==0) len= mvtab[0][1]; - else{ - int val, bit_size, range, code; - - bit_size = f_code - 1; - range = 1 << bit_size; - - val=mv; - if (val < 0) - val = -val; - val--; - code = (val >> bit_size) + 1; - if(code<33){ - len= mvtab[code][1] + 1 + bit_size; - }else{ - len= mvtab[32][1] + av_log2(code>>5) + 2 + bit_size; - } - } - - mv_penalty[f_code][mv+MAX_MV]= len; - } - } - - for(f_code=MAX_FCODE; f_code>0; f_code--){ - for(mv=-(16<<f_code); mv<(16<<f_code); mv++){ - fcode_tab[mv+MAX_MV]= f_code; - } - } - - for(mv=0; mv<MAX_MV*2+1; mv++){ - umv_fcode_tab[mv]= 1; - } -} -#endif - -#ifdef CONFIG_ENCODERS - -static void init_uni_dc_tab(void) -{ - int level, uni_code, uni_len; - - for(level=-256; level<256; level++){ - int size, v, l; - /* find number of bits */ - size = 0; - v = abs(level); - while (v) { - v >>= 1; - size++; - } - - if (level < 0) - l= (-level) ^ ((1 << size) - 1); - else - l= level; - - /* luminance */ - uni_code= DCtab_lum[size][0]; - uni_len = DCtab_lum[size][1]; - - if (size > 0) { - uni_code<<=size; uni_code|=l; - uni_len+=size; - if (size > 8){ - uni_code<<=1; uni_code|=1; - uni_len++; - } - } - uni_DCtab_lum_bits[level+256]= uni_code; - uni_DCtab_lum_len [level+256]= uni_len; - - /* chrominance */ - uni_code= DCtab_chrom[size][0]; - uni_len = DCtab_chrom[size][1]; - - if (size > 0) { - uni_code<<=size; uni_code|=l; - uni_len+=size; - if (size > 8){ - uni_code<<=1; uni_code|=1; - uni_len++; - } - } - uni_DCtab_chrom_bits[level+256]= uni_code; - uni_DCtab_chrom_len [level+256]= uni_len; - - } -} - -#endif //CONFIG_ENCODERS - -#ifdef CONFIG_ENCODERS -static void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){ - int slevel, run, last; - - assert(MAX_LEVEL >= 64); - assert(MAX_RUN >= 63); - - for(slevel=-64; slevel<64; slevel++){ - if(slevel==0) continue; - for(run=0; run<64; run++){ - for(last=0; last<=1; last++){ - const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64); - int level= slevel < 0 ? -slevel : slevel; - int sign= slevel < 0 ? 1 : 0; - int bits, len, code; - int level1, run1; - - len_tab[index]= 100; - - /* ESC0 */ - code= get_rl_index(rl, last, run, level); - bits= rl->table_vlc[code][0]; - len= rl->table_vlc[code][1]; - bits=bits*2+sign; len++; - - if(code!=rl->n && len < len_tab[index]){ - bits_tab[index]= bits; - len_tab [index]= len; - } -#if 1 - /* ESC1 */ - bits= rl->table_vlc[rl->n][0]; - len= rl->table_vlc[rl->n][1]; - bits=bits*2; len++; //esc1 - level1= level - rl->max_level[last][run]; - if(level1>0){ - code= get_rl_index(rl, last, run, level1); - bits<<= rl->table_vlc[code][1]; - len += rl->table_vlc[code][1]; - bits += rl->table_vlc[code][0]; - bits=bits*2+sign; len++; - - if(code!=rl->n && len < len_tab[index]){ - bits_tab[index]= bits; - len_tab [index]= len; - } - } -#endif -#if 1 - /* ESC2 */ - bits= rl->table_vlc[rl->n][0]; - len= rl->table_vlc[rl->n][1]; - bits=bits*4+2; len+=2; //esc2 - run1 = run - rl->max_run[last][level] - 1; - if(run1>=0){ - code= get_rl_index(rl, last, run1, level); - bits<<= rl->table_vlc[code][1]; - len += rl->table_vlc[code][1]; - bits += rl->table_vlc[code][0]; - bits=bits*2+sign; len++; - - if(code!=rl->n && len < len_tab[index]){ - bits_tab[index]= bits; - len_tab [index]= len; - } - } -#endif - /* ESC3 */ - bits= rl->table_vlc[rl->n][0]; - len = rl->table_vlc[rl->n][1]; - bits=bits*4+3; len+=2; //esc3 - bits=bits*2+last; len++; - bits=bits*64+run; len+=6; - bits=bits*2+1; len++; //marker - bits=bits*4096+(slevel&0xfff); len+=12; - bits=bits*2+1; len++; //marker - - if(len < len_tab[index]){ - bits_tab[index]= bits; - len_tab [index]= len; - } - } - } - } -} - -static void init_uni_h263_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){ - int slevel, run, last; - - assert(MAX_LEVEL >= 64); - assert(MAX_RUN >= 63); - - for(slevel=-64; slevel<64; slevel++){ - if(slevel==0) continue; - for(run=0; run<64; run++){ - for(last=0; last<=1; last++){ - const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64); - int level= slevel < 0 ? -slevel : slevel; - int sign= slevel < 0 ? 1 : 0; - int bits, len, code; - - len_tab[index]= 100; - - /* ESC0 */ - code= get_rl_index(rl, last, run, level); - bits= rl->table_vlc[code][0]; - len= rl->table_vlc[code][1]; - bits=bits*2+sign; len++; - - if(code!=rl->n && len < len_tab[index]){ - if(bits_tab) bits_tab[index]= bits; - len_tab [index]= len; - } - /* ESC */ - bits= rl->table_vlc[rl->n][0]; - len = rl->table_vlc[rl->n][1]; - bits=bits*2+last; len++; - bits=bits*64+run; len+=6; - bits=bits*256+(level&0xff); len+=8; - - if(len < len_tab[index]){ - if(bits_tab) bits_tab[index]= bits; - len_tab [index]= len; - } - } - } - } -} - -void h263_encode_init(MpegEncContext *s) -{ - static int done = 0; - - if (!done) { - done = 1; - - init_uni_dc_tab(); - - init_rl(&rl_inter, static_rl_table_store[0]); - init_rl(&rl_intra, static_rl_table_store[1]); - init_rl(&rl_intra_aic, static_rl_table_store[2]); - - init_uni_mpeg4_rl_tab(&rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len); - init_uni_mpeg4_rl_tab(&rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len); - - init_uni_h263_rl_tab(&rl_intra_aic, NULL, uni_h263_intra_aic_rl_len); - init_uni_h263_rl_tab(&rl_inter , NULL, uni_h263_inter_rl_len); - - init_mv_penalty_and_fcode(s); - } - s->me.mv_penalty= mv_penalty; //FIXME exact table for msmpeg4 & h263p - - s->intra_ac_vlc_length =s->inter_ac_vlc_length = uni_h263_inter_rl_len; - s->intra_ac_vlc_last_length=s->inter_ac_vlc_last_length= uni_h263_inter_rl_len + 128*64; - if(s->h263_aic){ - s->intra_ac_vlc_length = uni_h263_intra_aic_rl_len; - s->intra_ac_vlc_last_length= uni_h263_intra_aic_rl_len + 128*64; - } - s->ac_esc_length= 7+1+6+8; - - // use fcodes >1 only for mpeg4 & h263 & h263p FIXME - switch(s->codec_id){ - case CODEC_ID_MPEG4: - s->fcode_tab= fcode_tab; - s->min_qcoeff= -2048; - s->max_qcoeff= 2047; - s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len; - s->intra_ac_vlc_last_length= uni_mpeg4_intra_rl_len + 128*64; - s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len; - s->inter_ac_vlc_last_length= uni_mpeg4_inter_rl_len + 128*64; - s->luma_dc_vlc_length= uni_DCtab_lum_len; - s->chroma_dc_vlc_length= uni_DCtab_chrom_len; - s->ac_esc_length= 7+2+1+6+1+12+1; - s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; - s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table; - - if(s->flags & CODEC_FLAG_GLOBAL_HEADER){ - - s->avctx->extradata= av_malloc(1024); - init_put_bits(&s->pb, s->avctx->extradata, 1024); - - if(!(s->workaround_bugs & FF_BUG_MS)) - mpeg4_encode_visual_object_header(s); - mpeg4_encode_vol_header(s, 0, 0); - -// ff_mpeg4_stuffing(&s->pb); ? - flush_put_bits(&s->pb); - s->avctx->extradata_size= (put_bits_count(&s->pb)+7)>>3; - } - - break; - case CODEC_ID_H263P: - if(s->umvplus) - s->fcode_tab= umv_fcode_tab; - if(s->modified_quant){ - s->min_qcoeff= -2047; - s->max_qcoeff= 2047; - }else{ - s->min_qcoeff= -127; - s->max_qcoeff= 127; - } - break; - //Note for mpeg4 & h263 the dc-scale table will be set per frame as needed later - case CODEC_ID_FLV1: - if (s->h263_flv > 1) { - s->min_qcoeff= -1023; - s->max_qcoeff= 1023; - } else { - s->min_qcoeff= -127; - s->max_qcoeff= 127; - } - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; - break; - default: //nothing needed - default table already set in mpegvideo.c - s->min_qcoeff= -127; - s->max_qcoeff= 127; - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; - } -} - -/** - * encodes a 8x8 block. - * @param block the 8x8 block - * @param n block index (0-3 are luma, 4-5 are chroma) - */ -static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n) -{ - int level, run, last, i, j, last_index, last_non_zero, sign, slevel, code; - RLTable *rl; - - rl = &rl_inter; - if (s->mb_intra && !s->h263_aic) { - /* DC coef */ - level = block[0]; - /* 255 cannot be represented, so we clamp */ - if (level > 254) { - level = 254; - block[0] = 254; - } - /* 0 cannot be represented also */ - else if (level < 1) { - level = 1; - block[0] = 1; - } - if (level == 128) //FIXME check rv10 - put_bits(&s->pb, 8, 0xff); - else - put_bits(&s->pb, 8, level); - i = 1; - } else { - i = 0; - if (s->h263_aic && s->mb_intra) - rl = &rl_intra_aic; - - if(s->alt_inter_vlc && !s->mb_intra){ - int aic_vlc_bits=0; - int inter_vlc_bits=0; - int wrong_pos=-1; - int aic_code; - - last_index = s->block_last_index[n]; - last_non_zero = i - 1; - for (; i <= last_index; i++) { - j = s->intra_scantable.permutated[i]; - level = block[j]; - if (level) { - run = i - last_non_zero - 1; - last = (i == last_index); - - if(level<0) level= -level; - - code = get_rl_index(rl, last, run, level); - aic_code = get_rl_index(&rl_intra_aic, last, run, level); - inter_vlc_bits += rl->table_vlc[code][1]+1; - aic_vlc_bits += rl_intra_aic.table_vlc[aic_code][1]+1; - - if (code == rl->n) { - inter_vlc_bits += 1+6+8-1; - } - if (aic_code == rl_intra_aic.n) { - aic_vlc_bits += 1+6+8-1; - wrong_pos += run + 1; - }else - wrong_pos += wrong_run[aic_code]; - last_non_zero = i; - } - } - i = 0; - if(aic_vlc_bits < inter_vlc_bits && wrong_pos > 63) - rl = &rl_intra_aic; - } - } - - /* AC coefs */ - last_index = s->block_last_index[n]; - last_non_zero = i - 1; - for (; i <= last_index; i++) { - j = s->intra_scantable.permutated[i]; - level = block[j]; - if (level) { - run = i - last_non_zero - 1; - last = (i == last_index); - sign = 0; - slevel = level; - if (level < 0) { - sign = 1; - level = -level; - } - code = get_rl_index(rl, last, run, level); - put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); - if (code == rl->n) { - if(s->h263_flv <= 1){ - put_bits(&s->pb, 1, last); - put_bits(&s->pb, 6, run); - - assert(slevel != 0); - - if(level < 128) - put_bits(&s->pb, 8, slevel & 0xff); - else{ - put_bits(&s->pb, 8, 128); - put_bits(&s->pb, 5, slevel & 0x1f); - put_bits(&s->pb, 6, (slevel>>5)&0x3f); - } - }else{ - if(level < 64) { // 7-bit level - put_bits(&s->pb, 1, 0); - put_bits(&s->pb, 1, last); - put_bits(&s->pb, 6, run); - - put_bits(&s->pb, 7, slevel & 0x7f); - } else { - /* 11-bit level */ - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 1, last); - put_bits(&s->pb, 6, run); - - put_bits(&s->pb, 11, slevel & 0x7ff); - } - } - } else { - put_bits(&s->pb, 1, sign); - } - last_non_zero = i; - } - } -} -#endif - -#ifdef CONFIG_ENCODERS - -/***************************************************/ -/** - * add mpeg4 stuffing bits (01...1) - */ -void ff_mpeg4_stuffing(PutBitContext * pbc) -{ - int length; - put_bits(pbc, 1, 0); - length= (-put_bits_count(pbc))&7; - if(length) put_bits(pbc, length, (1<<length)-1); -} - -/* must be called before writing the header */ -void ff_set_mpeg4_time(MpegEncContext * s, int picture_number){ - int time_div, time_mod; - - assert(s->current_picture_ptr->pts != AV_NOPTS_VALUE); - s->time= s->current_picture_ptr->pts*s->avctx->time_base.num; - - time_div= s->time/s->avctx->time_base.den; - time_mod= s->time%s->avctx->time_base.den; - - if(s->pict_type==B_TYPE){ - s->pb_time= s->pp_time - (s->last_non_b_time - s->time); - assert(s->pb_time > 0 && s->pb_time < s->pp_time); - ff_mpeg4_init_direct_mv(s); - }else{ - s->last_time_base= s->time_base; - s->time_base= time_div; - s->pp_time= s->time - s->last_non_b_time; - s->last_non_b_time= s->time; - assert(picture_number==0 || s->pp_time > 0); - } -} - -static void mpeg4_encode_gop_header(MpegEncContext * s){ - int hours, minutes, seconds; - int64_t time; - - put_bits(&s->pb, 16, 0); - put_bits(&s->pb, 16, GOP_STARTCODE); - - time= s->current_picture_ptr->pts; - if(s->reordered_input_picture[1]) - time= FFMIN(time, s->reordered_input_picture[1]->pts); - time= time*s->avctx->time_base.num; - - seconds= time/s->avctx->time_base.den; - minutes= seconds/60; seconds %= 60; - hours= minutes/60; minutes %= 60; - hours%=24; - - put_bits(&s->pb, 5, hours); - put_bits(&s->pb, 6, minutes); - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 6, seconds); - - put_bits(&s->pb, 1, !!(s->flags&CODEC_FLAG_CLOSED_GOP)); - put_bits(&s->pb, 1, 0); //broken link == NO - - s->last_time_base= time / s->avctx->time_base.den; - - ff_mpeg4_stuffing(&s->pb); -} - -static void mpeg4_encode_visual_object_header(MpegEncContext * s){ - int profile_and_level_indication; - int vo_ver_id; - - if(s->avctx->profile != FF_PROFILE_UNKNOWN){ - profile_and_level_indication = s->avctx->profile << 4; - }else if(s->max_b_frames || s->quarter_sample){ - profile_and_level_indication= 0xF0; // adv simple - }else{ - profile_and_level_indication= 0x00; // simple - } - - if(s->avctx->level != FF_LEVEL_UNKNOWN){ - profile_and_level_indication |= s->avctx->level; - }else{ - profile_and_level_indication |= 1; //level 1 - } - - if(profile_and_level_indication>>4 == 0xF){ - vo_ver_id= 5; - }else{ - vo_ver_id= 1; - } - - //FIXME levels - - put_bits(&s->pb, 16, 0); - put_bits(&s->pb, 16, VOS_STARTCODE); - - put_bits(&s->pb, 8, profile_and_level_indication); - - put_bits(&s->pb, 16, 0); - put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE); - - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 4, vo_ver_id); - put_bits(&s->pb, 3, 1); //priority - - put_bits(&s->pb, 4, 1); //visual obj type== video obj - - put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME - - ff_mpeg4_stuffing(&s->pb); -} - -static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number) -{ - int vo_ver_id; - - if(s->max_b_frames || s->quarter_sample){ - vo_ver_id= 5; - s->vo_type= ADV_SIMPLE_VO_TYPE; - }else{ - vo_ver_id= 1; - s->vo_type= SIMPLE_VO_TYPE; - } - - put_bits(&s->pb, 16, 0); - put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */ - put_bits(&s->pb, 16, 0); - put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */ - - put_bits(&s->pb, 1, 0); /* random access vol */ - put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */ - if(s->workaround_bugs & FF_BUG_MS) { - put_bits(&s->pb, 1, 0); /* is obj layer id= no */ - } else { - put_bits(&s->pb, 1, 1); /* is obj layer id= yes */ - put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */ - put_bits(&s->pb, 3, 1); /* is obj layer priority */ - } - - aspect_to_info(s, s->avctx->sample_aspect_ratio); - - put_bits(&s->pb, 4, s->aspect_ratio_info);/* aspect ratio info */ - if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){ - put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num); - put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den); - } - - if(s->workaround_bugs & FF_BUG_MS) { // - put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */ - } else { - put_bits(&s->pb, 1, 1); /* vol control parameters= yes */ - put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */ - put_bits(&s->pb, 1, s->low_delay); - put_bits(&s->pb, 1, 0); /* vbv parameters= no */ - } - - put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */ - put_bits(&s->pb, 1, 1); /* marker bit */ - - put_bits(&s->pb, 16, s->avctx->time_base.den); - if (s->time_increment_bits < 1) - s->time_increment_bits = 1; - put_bits(&s->pb, 1, 1); /* marker bit */ - put_bits(&s->pb, 1, 0); /* fixed vop rate=no */ - put_bits(&s->pb, 1, 1); /* marker bit */ - put_bits(&s->pb, 13, s->width); /* vol width */ - put_bits(&s->pb, 1, 1); /* marker bit */ - put_bits(&s->pb, 13, s->height); /* vol height */ - put_bits(&s->pb, 1, 1); /* marker bit */ - put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1); - put_bits(&s->pb, 1, 1); /* obmc disable */ - if (vo_ver_id == 1) { - put_bits(&s->pb, 1, s->vol_sprite_usage); /* sprite enable */ - }else{ - put_bits(&s->pb, 2, s->vol_sprite_usage); /* sprite enable */ - } - - put_bits(&s->pb, 1, 0); /* not 8 bit == false */ - put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/ - - if(s->mpeg_quant){ - ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); - ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); - } - - if (vo_ver_id != 1) - put_bits(&s->pb, 1, s->quarter_sample); - put_bits(&s->pb, 1, 1); /* complexity estimation disable */ - s->resync_marker= s->rtp_mode; - put_bits(&s->pb, 1, s->resync_marker ? 0 : 1);/* resync marker disable */ - put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0); - if(s->data_partitioning){ - put_bits(&s->pb, 1, 0); /* no rvlc */ - } - - if (vo_ver_id != 1){ - put_bits(&s->pb, 1, 0); /* newpred */ - put_bits(&s->pb, 1, 0); /* reduced res vop */ - } - put_bits(&s->pb, 1, 0); /* scalability */ - - ff_mpeg4_stuffing(&s->pb); - - /* user data */ - if(!(s->flags & CODEC_FLAG_BITEXACT)){ - put_bits(&s->pb, 16, 0); - put_bits(&s->pb, 16, 0x1B2); /* user_data */ - ff_put_string(&s->pb, LIBAVCODEC_IDENT, 0); - } -} - -/* write mpeg4 VOP header */ -void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number) -{ - int time_incr; - int time_div, time_mod; - - if(s->pict_type==I_TYPE){ - if(!(s->flags&CODEC_FLAG_GLOBAL_HEADER)){ - if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) //HACK, the reference sw is buggy - mpeg4_encode_visual_object_header(s); - if(s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number==0) //HACK, the reference sw is buggy - mpeg4_encode_vol_header(s, 0, 0); - } - if(!(s->workaround_bugs & FF_BUG_MS)) - mpeg4_encode_gop_header(s); - } - - s->partitioned_frame= s->data_partitioning && s->pict_type!=B_TYPE; - -//printf("num:%d rate:%d base:%d\n", s->picture_number, s->time_base.den, FRAME_RATE_BASE); - - put_bits(&s->pb, 16, 0); /* vop header */ - put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */ - put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */ - - assert(s->time>=0); - time_div= s->time/s->avctx->time_base.den; - time_mod= s->time%s->avctx->time_base.den; - time_incr= time_div - s->last_time_base; - assert(time_incr >= 0); - while(time_incr--) - put_bits(&s->pb, 1, 1); - - put_bits(&s->pb, 1, 0); - - put_bits(&s->pb, 1, 1); /* marker */ - put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */ - put_bits(&s->pb, 1, 1); /* marker */ - put_bits(&s->pb, 1, 1); /* vop coded */ - if ( s->pict_type == P_TYPE - || (s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE)) { - put_bits(&s->pb, 1, s->no_rounding); /* rounding type */ - } - put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */ - if(!s->progressive_sequence){ - put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first); - put_bits(&s->pb, 1, s->alternate_scan); - } - //FIXME sprite stuff - - put_bits(&s->pb, 5, s->qscale); - - if (s->pict_type != I_TYPE) - put_bits(&s->pb, 3, s->f_code); /* fcode_for */ - if (s->pict_type == B_TYPE) - put_bits(&s->pb, 3, s->b_code); /* fcode_back */ - // printf("****frame %d\n", picture_number); -} - -#endif //CONFIG_ENCODERS - -/** - * set qscale and update qscale dependent variables. - */ -void ff_set_qscale(MpegEncContext * s, int qscale) -{ - if (qscale < 1) - qscale = 1; - else if (qscale > 31) - qscale = 31; - - s->qscale = qscale; - s->chroma_qscale= s->chroma_qscale_table[qscale]; - - s->y_dc_scale= s->y_dc_scale_table[ qscale ]; - s->c_dc_scale= s->c_dc_scale_table[ s->chroma_qscale ]; -} - -/** - * predicts the dc. - * encoding quantized level -> quantized diff - * decoding quantized diff -> quantized level - * @param n block index (0-3 are luma, 4-5 are chroma) - * @param dir_ptr pointer to an integer where the prediction direction will be stored - */ -static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, int level, int *dir_ptr, int encoding) -{ - int a, b, c, wrap, pred, scale, ret; - int16_t *dc_val; - - /* find prediction */ - if (n < 4) { - scale = s->y_dc_scale; - } else { - scale = s->c_dc_scale; - } - if(IS_3IV1) - scale= 8; - - wrap= s->block_wrap[n]; - dc_val = s->dc_val[0] + s->block_index[n]; - - /* B C - * A X - */ - a = dc_val[ - 1]; - b = dc_val[ - 1 - wrap]; - c = dc_val[ - wrap]; - - /* outside slice handling (we can't do that by memset as we need the dc for error resilience) */ - if(s->first_slice_line && n!=3){ - if(n!=2) b=c= 1024; - if(n!=1 && s->mb_x == s->resync_mb_x) b=a= 1024; - } - if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1){ - if(n==0 || n==4 || n==5) - b=1024; - } - - if (abs(a - b) < abs(b - c)) { - pred = c; - *dir_ptr = 1; /* top */ - } else { - pred = a; - *dir_ptr = 0; /* left */ - } - /* we assume pred is positive */ - pred = FASTDIV((pred + (scale >> 1)), scale); - - if(encoding){ - ret = level - pred; - }else{ - level += pred; - ret= level; - if(s->error_resilience>=3){ - if(level<0){ - av_log(s->avctx, AV_LOG_ERROR, "dc<0 at %dx%d\n", s->mb_x, s->mb_y); - return -1; - } - if(level*scale > 2048 + scale){ - av_log(s->avctx, AV_LOG_ERROR, "dc overflow at %dx%d\n", s->mb_x, s->mb_y); - return -1; - } - } - } - level *=scale; - if(level&(~2047)){ - if(level<0) - level=0; - else if(!(s->workaround_bugs&FF_BUG_DC_CLIP)) - level=2047; - } - dc_val[0]= level; - - return ret; -} - -/** - * predicts the ac. - * @param n block index (0-3 are luma, 4-5 are chroma) - * @param dir the ac prediction direction - */ -void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n, - int dir) -{ - int i; - int16_t *ac_val, *ac_val1; - int8_t * const qscale_table= s->current_picture.qscale_table; - - /* find prediction */ - ac_val = s->ac_val[0][0] + s->block_index[n] * 16; - ac_val1 = ac_val; - if (s->ac_pred) { - if (dir == 0) { - const int xy= s->mb_x-1 + s->mb_y*s->mb_stride; - /* left prediction */ - ac_val -= 16; - - if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){ - /* same qscale */ - for(i=1;i<8;i++) { - block[s->dsp.idct_permutation[i<<3]] += ac_val[i]; - } - }else{ - /* different qscale, we must rescale */ - for(i=1;i<8;i++) { - block[s->dsp.idct_permutation[i<<3]] += ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale); - } - } - } else { - const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride; - /* top prediction */ - ac_val -= 16 * s->block_wrap[n]; - - if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){ - /* same qscale */ - for(i=1;i<8;i++) { - block[s->dsp.idct_permutation[i]] += ac_val[i + 8]; - } - }else{ - /* different qscale, we must rescale */ - for(i=1;i<8;i++) { - block[s->dsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale); - } - } - } - } - /* left copy */ - for(i=1;i<8;i++) - ac_val1[i ] = block[s->dsp.idct_permutation[i<<3]]; - - /* top copy */ - for(i=1;i<8;i++) - ac_val1[8 + i] = block[s->dsp.idct_permutation[i ]]; - -} - -#ifdef CONFIG_ENCODERS - -/** - * encodes the dc value. - * @param n block index (0-3 are luma, 4-5 are chroma) - */ -static inline void mpeg4_encode_dc(PutBitContext * s, int level, int n) -{ -#if 1 -// if(level<-255 || level>255) printf("dc overflow\n"); - level+=256; - if (n < 4) { - /* luminance */ - put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]); - } else { - /* chrominance */ - put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]); - } -#else - int size, v; - /* find number of bits */ - size = 0; - v = abs(level); - while (v) { - v >>= 1; - size++; - } - - if (n < 4) { - /* luminance */ - put_bits(&s->pb, DCtab_lum[size][1], DCtab_lum[size][0]); - } else { - /* chrominance */ - put_bits(&s->pb, DCtab_chrom[size][1], DCtab_chrom[size][0]); - } - - /* encode remaining bits */ - if (size > 0) { - if (level < 0) - level = (-level) ^ ((1 << size) - 1); - put_bits(&s->pb, size, level); - if (size > 8) - put_bits(&s->pb, 1, 1); - } -#endif -} - -static inline int mpeg4_get_dc_length(int level, int n){ - if (n < 4) { - return uni_DCtab_lum_len[level + 256]; - } else { - return uni_DCtab_chrom_len[level + 256]; - } -} - -/** - * encodes a 8x8 block - * @param n block index (0-3 are luma, 4-5 are chroma) - */ -static inline void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int n, int intra_dc, - uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb) -{ - int i, last_non_zero; -#if 0 //variables for the outcommented version - int code, sign, last; -#endif - const RLTable *rl; - uint32_t *bits_tab; - uint8_t *len_tab; - const int last_index = s->block_last_index[n]; - - if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away - /* mpeg4 based DC predictor */ - mpeg4_encode_dc(dc_pb, intra_dc, n); - if(last_index<1) return; - i = 1; - rl = &rl_intra; - bits_tab= uni_mpeg4_intra_rl_bits; - len_tab = uni_mpeg4_intra_rl_len; - } else { - if(last_index<0) return; - i = 0; - rl = &rl_inter; - bits_tab= uni_mpeg4_inter_rl_bits; - len_tab = uni_mpeg4_inter_rl_len; - } - - /* AC coefs */ - last_non_zero = i - 1; -#if 1 - for (; i < last_index; i++) { - int level = block[ scan_table[i] ]; - if (level) { - int run = i - last_non_zero - 1; - level+=64; - if((level&(~127)) == 0){ - const int index= UNI_MPEG4_ENC_INDEX(0, run, level); - put_bits(ac_pb, len_tab[index], bits_tab[index]); - }else{ //ESC3 - put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(0<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1); - } - last_non_zero = i; - } - } - /*if(i<=last_index)*/{ - int level = block[ scan_table[i] ]; - int run = i - last_non_zero - 1; - level+=64; - if((level&(~127)) == 0){ - const int index= UNI_MPEG4_ENC_INDEX(1, run, level); - put_bits(ac_pb, len_tab[index], bits_tab[index]); - }else{ //ESC3 - put_bits(ac_pb, 7+2+1+6+1+12+1, (3<<23)+(3<<21)+(1<<20)+(run<<14)+(1<<13)+(((level-64)&0xfff)<<1)+1); - } - } -#else - for (; i <= last_index; i++) { - const int slevel = block[ scan_table[i] ]; - if (slevel) { - int level; - int run = i - last_non_zero - 1; - last = (i == last_index); - sign = 0; - level = slevel; - if (level < 0) { - sign = 1; - level = -level; - } - code = get_rl_index(rl, last, run, level); - put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); - if (code == rl->n) { - int level1, run1; - level1 = level - rl->max_level[last][run]; - if (level1 < 1) - goto esc2; - code = get_rl_index(rl, last, run, level1); - if (code == rl->n) { - esc2: - put_bits(ac_pb, 1, 1); - if (level > MAX_LEVEL) - goto esc3; - run1 = run - rl->max_run[last][level] - 1; - if (run1 < 0) - goto esc3; - code = get_rl_index(rl, last, run1, level); - if (code == rl->n) { - esc3: - /* third escape */ - put_bits(ac_pb, 1, 1); - put_bits(ac_pb, 1, last); - put_bits(ac_pb, 6, run); - put_bits(ac_pb, 1, 1); - put_bits(ac_pb, 12, slevel & 0xfff); - put_bits(ac_pb, 1, 1); - } else { - /* second escape */ - put_bits(ac_pb, 1, 0); - put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); - put_bits(ac_pb, 1, sign); - } - } else { - /* first escape */ - put_bits(ac_pb, 1, 0); - put_bits(ac_pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); - put_bits(ac_pb, 1, sign); - } - } else { - put_bits(ac_pb, 1, sign); - } - last_non_zero = i; - } - } -#endif -} - -static int mpeg4_get_block_length(MpegEncContext * s, DCTELEM * block, int n, int intra_dc, - uint8_t *scan_table) -{ - int i, last_non_zero; - const RLTable *rl; - uint8_t *len_tab; - const int last_index = s->block_last_index[n]; - int len=0; - - if (s->mb_intra) { //Note gcc (3.2.1 at least) will optimize this away - /* mpeg4 based DC predictor */ - len += mpeg4_get_dc_length(intra_dc, n); - if(last_index<1) return len; - i = 1; - rl = &rl_intra; - len_tab = uni_mpeg4_intra_rl_len; - } else { - if(last_index<0) return 0; - i = 0; - rl = &rl_inter; - len_tab = uni_mpeg4_inter_rl_len; - } - - /* AC coefs */ - last_non_zero = i - 1; - for (; i < last_index; i++) { - int level = block[ scan_table[i] ]; - if (level) { - int run = i - last_non_zero - 1; - level+=64; - if((level&(~127)) == 0){ - const int index= UNI_MPEG4_ENC_INDEX(0, run, level); - len += len_tab[index]; - }else{ //ESC3 - len += 7+2+1+6+1+12+1; - } - last_non_zero = i; - } - } - /*if(i<=last_index)*/{ - int level = block[ scan_table[i] ]; - int run = i - last_non_zero - 1; - level+=64; - if((level&(~127)) == 0){ - const int index= UNI_MPEG4_ENC_INDEX(1, run, level); - len += len_tab[index]; - }else{ //ESC3 - len += 7+2+1+6+1+12+1; - } - } - - return len; -} - -#endif - - -/***********************************************/ -/* decoding */ - -static VLC intra_MCBPC_vlc; -static VLC inter_MCBPC_vlc; -static VLC cbpy_vlc; -static VLC mv_vlc; -static VLC dc_lum, dc_chrom; -static VLC sprite_trajectory; -static VLC mb_type_b_vlc; -static VLC h263_mbtype_b_vlc; -static VLC cbpc_b_vlc; - -void init_vlc_rl(RLTable *rl, int use_static) -{ - int i, q; - - /* Return if static table is already initialized */ - if(use_static && rl->rl_vlc[0]) - return; - - init_vlc(&rl->vlc, 9, rl->n + 1, - &rl->table_vlc[0][1], 4, 2, - &rl->table_vlc[0][0], 4, 2, use_static); - - - for(q=0; q<32; q++){ - int qmul= q*2; - int qadd= (q-1)|1; - - if(q==0){ - qmul=1; - qadd=0; - } - if(use_static) - rl->rl_vlc[q]= av_mallocz_static(rl->vlc.table_size*sizeof(RL_VLC_ELEM)); - else - rl->rl_vlc[q]= av_malloc(rl->vlc.table_size*sizeof(RL_VLC_ELEM)); - for(i=0; i<rl->vlc.table_size; i++){ - int code= rl->vlc.table[i][0]; - int len = rl->vlc.table[i][1]; - int level, run; - - if(len==0){ // illegal code - run= 66; - level= MAX_LEVEL; - }else if(len<0){ //more bits needed - run= 0; - level= code; - }else{ - if(code==rl->n){ //esc - run= 66; - level= 0; - }else{ - run= rl->table_run [code] + 1; - level= rl->table_level[code] * qmul + qadd; - if(code >= rl->last) run+=192; - } - } - rl->rl_vlc[q][i].len= len; - rl->rl_vlc[q][i].level= level; - rl->rl_vlc[q][i].run= run; - } - } -} - -/* init vlcs */ - -/* XXX: find a better solution to handle static init */ -void h263_decode_init_vlc(MpegEncContext *s) -{ - static int done = 0; - - if (!done) { - done = 1; - - init_vlc(&intra_MCBPC_vlc, INTRA_MCBPC_VLC_BITS, 9, - intra_MCBPC_bits, 1, 1, - intra_MCBPC_code, 1, 1, 1); - init_vlc(&inter_MCBPC_vlc, INTER_MCBPC_VLC_BITS, 28, - inter_MCBPC_bits, 1, 1, - inter_MCBPC_code, 1, 1, 1); - init_vlc(&cbpy_vlc, CBPY_VLC_BITS, 16, - &cbpy_tab[0][1], 2, 1, - &cbpy_tab[0][0], 2, 1, 1); - init_vlc(&mv_vlc, MV_VLC_BITS, 33, - &mvtab[0][1], 2, 1, - &mvtab[0][0], 2, 1, 1); - init_rl(&rl_inter, static_rl_table_store[0]); - init_rl(&rl_intra, static_rl_table_store[1]); - init_rl(&rvlc_rl_inter, static_rl_table_store[3]); - init_rl(&rvlc_rl_intra, static_rl_table_store[4]); - init_rl(&rl_intra_aic, static_rl_table_store[2]); - init_vlc_rl(&rl_inter, 1); - init_vlc_rl(&rl_intra, 1); - init_vlc_rl(&rvlc_rl_inter, 1); - init_vlc_rl(&rvlc_rl_intra, 1); - init_vlc_rl(&rl_intra_aic, 1); - init_vlc(&dc_lum, DC_VLC_BITS, 10 /* 13 */, - &DCtab_lum[0][1], 2, 1, - &DCtab_lum[0][0], 2, 1, 1); - init_vlc(&dc_chrom, DC_VLC_BITS, 10 /* 13 */, - &DCtab_chrom[0][1], 2, 1, - &DCtab_chrom[0][0], 2, 1, 1); - init_vlc(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15, - &sprite_trajectory_tab[0][1], 4, 2, - &sprite_trajectory_tab[0][0], 4, 2, 1); - init_vlc(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4, - &mb_type_b_tab[0][1], 2, 1, - &mb_type_b_tab[0][0], 2, 1, 1); - init_vlc(&h263_mbtype_b_vlc, H263_MBTYPE_B_VLC_BITS, 15, - &h263_mbtype_b_tab[0][1], 2, 1, - &h263_mbtype_b_tab[0][0], 2, 1, 1); - init_vlc(&cbpc_b_vlc, CBPC_B_VLC_BITS, 4, - &cbpc_b_tab[0][1], 2, 1, - &cbpc_b_tab[0][0], 2, 1, 1); - } -} - -/** - * Get the GOB height based on picture height. - */ -int ff_h263_get_gob_height(MpegEncContext *s){ - if (s->height <= 400) - return 1; - else if (s->height <= 800) - return 2; - else - return 4; -} - -int ff_h263_decode_mba(MpegEncContext *s) -{ - int i, mb_pos; - - for(i=0; i<6; i++){ - if(s->mb_num-1 <= ff_mba_max[i]) break; - } - mb_pos= get_bits(&s->gb, ff_mba_length[i]); - s->mb_x= mb_pos % s->mb_width; - s->mb_y= mb_pos / s->mb_width; - - return mb_pos; -} - -void ff_h263_encode_mba(MpegEncContext *s) -{ - int i, mb_pos; - - for(i=0; i<6; i++){ - if(s->mb_num-1 <= ff_mba_max[i]) break; - } - mb_pos= s->mb_x + s->mb_width*s->mb_y; - put_bits(&s->pb, ff_mba_length[i], mb_pos); -} - -/** - * decodes the group of blocks header or slice header. - * @return <0 if an error occured - */ -static int h263_decode_gob_header(MpegEncContext *s) -{ - unsigned int val, gfid, gob_number; - int left; - - /* Check for GOB Start Code */ - val = show_bits(&s->gb, 16); - if(val) - return -1; - - /* We have a GBSC probably with GSTUFF */ - skip_bits(&s->gb, 16); /* Drop the zeros */ - left= s->gb.size_in_bits - get_bits_count(&s->gb); - //MN: we must check the bits left or we might end in a infinite loop (or segfault) - for(;left>13; left--){ - if(get_bits1(&s->gb)) break; /* Seek the '1' bit */ - } - if(left<=13) - return -1; - - if(s->h263_slice_structured){ - if(get_bits1(&s->gb)==0) - return -1; - - ff_h263_decode_mba(s); - - if(s->mb_num > 1583) - if(get_bits1(&s->gb)==0) - return -1; - - s->qscale = get_bits(&s->gb, 5); /* SQUANT */ - if(get_bits1(&s->gb)==0) - return -1; - gfid = get_bits(&s->gb, 2); /* GFID */ - }else{ - gob_number = get_bits(&s->gb, 5); /* GN */ - s->mb_x= 0; - s->mb_y= s->gob_index* gob_number; - gfid = get_bits(&s->gb, 2); /* GFID */ - s->qscale = get_bits(&s->gb, 5); /* GQUANT */ - } - - if(s->mb_y >= s->mb_height) - return -1; - - if(s->qscale==0) - return -1; - - return 0; -} - -static inline void memsetw(short *tab, int val, int n) -{ - int i; - for(i=0;i<n;i++) - tab[i] = val; -} - -#ifdef CONFIG_ENCODERS - -void ff_mpeg4_init_partitions(MpegEncContext *s) -{ - uint8_t *start= pbBufPtr(&s->pb); - uint8_t *end= s->pb.buf_end; - int size= end - start; - int pb_size = (((long)start + size/3)&(~3)) - (long)start; - int tex_size= (size - 2*pb_size)&(~3); - - set_put_bits_buffer_size(&s->pb, pb_size); - init_put_bits(&s->tex_pb, start + pb_size , tex_size); - init_put_bits(&s->pb2 , start + pb_size + tex_size, pb_size); -} - -void ff_mpeg4_merge_partitions(MpegEncContext *s) -{ - const int pb2_len = put_bits_count(&s->pb2 ); - const int tex_pb_len= put_bits_count(&s->tex_pb); - const int bits= put_bits_count(&s->pb); - - if(s->pict_type==I_TYPE){ - put_bits(&s->pb, 19, DC_MARKER); - s->misc_bits+=19 + pb2_len + bits - s->last_bits; - s->i_tex_bits+= tex_pb_len; - }else{ - put_bits(&s->pb, 17, MOTION_MARKER); - s->misc_bits+=17 + pb2_len; - s->mv_bits+= bits - s->last_bits; - s->p_tex_bits+= tex_pb_len; - } - - flush_put_bits(&s->pb2); - flush_put_bits(&s->tex_pb); - - set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf); - ff_copy_bits(&s->pb, s->pb2.buf , pb2_len); - ff_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len); - s->last_bits= put_bits_count(&s->pb); -} - -#endif //CONFIG_ENCODERS - -int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s){ - switch(s->pict_type){ - case I_TYPE: - return 16; - case P_TYPE: - case S_TYPE: - return s->f_code+15; - case B_TYPE: - return FFMAX(FFMAX(s->f_code, s->b_code)+15, 17); - default: - return -1; - } -} - -#ifdef CONFIG_ENCODERS - -void ff_mpeg4_encode_video_packet_header(MpegEncContext *s) -{ - int mb_num_bits= av_log2(s->mb_num - 1) + 1; - - put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0); - put_bits(&s->pb, 1, 1); - - put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y*s->mb_width); - put_bits(&s->pb, s->quant_precision, s->qscale); - put_bits(&s->pb, 1, 0); /* no HEC */ -} - -#endif //CONFIG_ENCODERS - -/** - * check if the next stuff is a resync marker or the end. - * @return 0 if not - */ -static inline int mpeg4_is_resync(MpegEncContext *s){ - int bits_count= get_bits_count(&s->gb); - int v= show_bits(&s->gb, 16); - - if(s->workaround_bugs&FF_BUG_NO_PADDING){ - return 0; - } - - while(v<=0xFF){ - if(s->pict_type==B_TYPE || (v>>(8-s->pict_type)!=1) || s->partitioned_frame) - break; - skip_bits(&s->gb, 8+s->pict_type); - bits_count+= 8+s->pict_type; - v= show_bits(&s->gb, 16); - } - - if(bits_count + 8 >= s->gb.size_in_bits){ - v>>=8; - v|= 0x7F >> (7-(bits_count&7)); - - if(v==0x7F) - return 1; - }else{ - if(v == ff_mpeg4_resync_prefix[bits_count&7]){ - int len; - GetBitContext gb= s->gb; - - skip_bits(&s->gb, 1); - align_get_bits(&s->gb); - - for(len=0; len<32; len++){ - if(get_bits1(&s->gb)) break; - } - - s->gb= gb; - - if(len>=ff_mpeg4_get_video_packet_prefix_length(s)) - return 1; - } - } - return 0; -} - -/** - * decodes the next video packet. - * @return <0 if something went wrong - */ -static int mpeg4_decode_video_packet_header(MpegEncContext *s) -{ - int mb_num_bits= av_log2(s->mb_num - 1) + 1; - int header_extension=0, mb_num, len; - - /* is there enough space left for a video packet + header */ - if( get_bits_count(&s->gb) > s->gb.size_in_bits-20) return -1; - - for(len=0; len<32; len++){ - if(get_bits1(&s->gb)) break; - } - - if(len!=ff_mpeg4_get_video_packet_prefix_length(s)){ - av_log(s->avctx, AV_LOG_ERROR, "marker does not match f_code\n"); - return -1; - } - - if(s->shape != RECT_SHAPE){ - header_extension= get_bits1(&s->gb); - //FIXME more stuff here - } - - mb_num= get_bits(&s->gb, mb_num_bits); - if(mb_num>=s->mb_num){ - av_log(s->avctx, AV_LOG_ERROR, "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num); - return -1; - } - if(s->pict_type == B_TYPE){ - while(s->next_picture.mbskip_table[ s->mb_index2xy[ mb_num ] ]) mb_num++; - if(mb_num >= s->mb_num) return -1; // slice contains just skipped MBs which where allready decoded - } - - s->mb_x= mb_num % s->mb_width; - s->mb_y= mb_num / s->mb_width; - - if(s->shape != BIN_ONLY_SHAPE){ - int qscale= get_bits(&s->gb, s->quant_precision); - if(qscale) - s->chroma_qscale=s->qscale= qscale; - } - - if(s->shape == RECT_SHAPE){ - header_extension= get_bits1(&s->gb); - } - if(header_extension){ - int time_increment; - int time_incr=0; - - while (get_bits1(&s->gb) != 0) - time_incr++; - - check_marker(&s->gb, "before time_increment in video packed header"); - time_increment= get_bits(&s->gb, s->time_increment_bits); - check_marker(&s->gb, "before vop_coding_type in video packed header"); - - skip_bits(&s->gb, 2); /* vop coding type */ - //FIXME not rect stuff here - - if(s->shape != BIN_ONLY_SHAPE){ - skip_bits(&s->gb, 3); /* intra dc vlc threshold */ -//FIXME don't just ignore everything - if(s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE){ - mpeg4_decode_sprite_trajectory(s, &s->gb); - av_log(s->avctx, AV_LOG_ERROR, "untested\n"); - } - - //FIXME reduced res stuff here - - if (s->pict_type != I_TYPE) { - int f_code = get_bits(&s->gb, 3); /* fcode_for */ - if(f_code==0){ - av_log(s->avctx, AV_LOG_ERROR, "Error, video packet header damaged (f_code=0)\n"); - } - } - if (s->pict_type == B_TYPE) { - int b_code = get_bits(&s->gb, 3); - if(b_code==0){ - av_log(s->avctx, AV_LOG_ERROR, "Error, video packet header damaged (b_code=0)\n"); - } - } - } - } - //FIXME new-pred stuff - -//printf("parse ok %d %d %d %d\n", mb_num, s->mb_x + s->mb_y*s->mb_width, get_bits_count(gb), get_bits_count(&s->gb)); - - return 0; -} - -void ff_mpeg4_clean_buffers(MpegEncContext *s) -{ - int c_wrap, c_xy, l_wrap, l_xy; - - l_wrap= s->b8_stride; - l_xy= (2*s->mb_y-1)*l_wrap + s->mb_x*2 - 1; - c_wrap= s->mb_stride; - c_xy= (s->mb_y-1)*c_wrap + s->mb_x - 1; - -#if 0 - /* clean DC */ - memsetw(s->dc_val[0] + l_xy, 1024, l_wrap*2+1); - memsetw(s->dc_val[1] + c_xy, 1024, c_wrap+1); - memsetw(s->dc_val[2] + c_xy, 1024, c_wrap+1); -#endif - - /* clean AC */ - memset(s->ac_val[0] + l_xy, 0, (l_wrap*2+1)*16*sizeof(int16_t)); - memset(s->ac_val[1] + c_xy, 0, (c_wrap +1)*16*sizeof(int16_t)); - memset(s->ac_val[2] + c_xy, 0, (c_wrap +1)*16*sizeof(int16_t)); - - /* clean MV */ - // we can't clear the MVs as they might be needed by a b frame -// memset(s->motion_val + l_xy, 0, (l_wrap*2+1)*2*sizeof(int16_t)); -// memset(s->motion_val, 0, 2*sizeof(int16_t)*(2 + s->mb_width*2)*(2 + s->mb_height*2)); - s->last_mv[0][0][0]= - s->last_mv[0][0][1]= - s->last_mv[1][0][0]= - s->last_mv[1][0][1]= 0; -} - -/** - * decodes the group of blocks / video packet header. - * @return <0 if no resync found - */ -int ff_h263_resync(MpegEncContext *s){ - int left, ret; - - if(s->codec_id==CODEC_ID_MPEG4){ - skip_bits1(&s->gb); - align_get_bits(&s->gb); - } - - if(show_bits(&s->gb, 16)==0){ - if(s->codec_id==CODEC_ID_MPEG4) - ret= mpeg4_decode_video_packet_header(s); - else - ret= h263_decode_gob_header(s); - if(ret>=0) - return 0; - } - //ok, it's not where its supposed to be ... - s->gb= s->last_resync_gb; - align_get_bits(&s->gb); - left= s->gb.size_in_bits - get_bits_count(&s->gb); - - for(;left>16+1+5+5; left-=8){ - if(show_bits(&s->gb, 16)==0){ - GetBitContext bak= s->gb; - - if(s->codec_id==CODEC_ID_MPEG4) - ret= mpeg4_decode_video_packet_header(s); - else - ret= h263_decode_gob_header(s); - if(ret>=0) - return 0; - - s->gb= bak; - } - skip_bits(&s->gb, 8); - } - - return -1; -} - -/** - * gets the average motion vector for a GMC MB. - * @param n either 0 for the x component or 1 for y - * @returns the average MV for a GMC MB - */ -static inline int get_amv(MpegEncContext *s, int n){ - int x, y, mb_v, sum, dx, dy, shift; - int len = 1 << (s->f_code + 4); - const int a= s->sprite_warping_accuracy; - - if(s->workaround_bugs & FF_BUG_AMV) - len >>= s->quarter_sample; - - if(s->real_sprite_warping_points==1){ - if(s->divx_version==500 && s->divx_build==413) - sum= s->sprite_offset[0][n] / (1<<(a - s->quarter_sample)); - else - sum= RSHIFT(s->sprite_offset[0][n]<<s->quarter_sample, a); - }else{ - dx= s->sprite_delta[n][0]; - dy= s->sprite_delta[n][1]; - shift= s->sprite_shift[0]; - if(n) dy -= 1<<(shift + a + 1); - else dx -= 1<<(shift + a + 1); - mb_v= s->sprite_offset[0][n] + dx*s->mb_x*16 + dy*s->mb_y*16; - - sum=0; - for(y=0; y<16; y++){ - int v; - - v= mb_v + dy*y; - //XXX FIXME optimize - for(x=0; x<16; x++){ - sum+= v>>shift; - v+= dx; - } - } - sum= RSHIFT(sum, a+8-s->quarter_sample); - } - - if (sum < -len) sum= -len; - else if (sum >= len) sum= len-1; - - return sum; -} - -/** - * decodes first partition. - * @return number of MBs decoded or <0 if an error occured - */ -static int mpeg4_decode_partition_a(MpegEncContext *s){ - int mb_num; - static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; - - /* decode first partition */ - mb_num=0; - s->first_slice_line=1; - for(; s->mb_y<s->mb_height; s->mb_y++){ - ff_init_block_index(s); - for(; s->mb_x<s->mb_width; s->mb_x++){ - const int xy= s->mb_x + s->mb_y*s->mb_stride; - int cbpc; - int dir=0; - - mb_num++; - ff_update_block_index(s); - if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1) - s->first_slice_line=0; - - if(s->pict_type==I_TYPE){ - int i; - - do{ - if(show_bits_long(&s->gb, 19)==DC_MARKER){ - return mb_num-1; - } - - cbpc = get_vlc2(&s->gb, intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - }while(cbpc == 8); - - s->cbp_table[xy]= cbpc & 3; - s->current_picture.mb_type[xy]= MB_TYPE_INTRA; - s->mb_intra = 1; - - if(cbpc & 4) { - ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); - } - s->current_picture.qscale_table[xy]= s->qscale; - - s->mbintra_table[xy]= 1; - for(i=0; i<6; i++){ - int dc_pred_dir; - int dc= mpeg4_decode_dc(s, i, &dc_pred_dir); - if(dc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "DC corrupted at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - dir<<=1; - if(dc_pred_dir) dir|=1; - } - s->pred_dir_table[xy]= dir; - }else{ /* P/S_TYPE */ - int mx, my, pred_x, pred_y, bits; - int16_t * const mot_val= s->current_picture.motion_val[0][s->block_index[0]]; - const int stride= s->b8_stride*2; - -try_again: - bits= show_bits(&s->gb, 17); - if(bits==MOTION_MARKER){ - return mb_num-1; - } - skip_bits1(&s->gb); - if(bits&0x10000){ - /* skip mb */ - if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE){ - s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0; - mx= get_amv(s, 0); - my= get_amv(s, 1); - }else{ - s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; - mx=my=0; - } - mot_val[0 ]= mot_val[2 ]= - mot_val[0+stride]= mot_val[2+stride]= mx; - mot_val[1 ]= mot_val[3 ]= - mot_val[1+stride]= mot_val[3+stride]= my; - - if(s->mbintra_table[xy]) - ff_clean_intra_table_entries(s); - continue; - } - - cbpc = get_vlc2(&s->gb, inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - if(cbpc == 20) - goto try_again; - - s->cbp_table[xy]= cbpc&(8+3); //8 is dquant - - s->mb_intra = ((cbpc & 4) != 0); - - if(s->mb_intra){ - s->current_picture.mb_type[xy]= MB_TYPE_INTRA; - s->mbintra_table[xy]= 1; - mot_val[0 ]= mot_val[2 ]= - mot_val[0+stride]= mot_val[2+stride]= 0; - mot_val[1 ]= mot_val[3 ]= - mot_val[1+stride]= mot_val[3+stride]= 0; - }else{ - if(s->mbintra_table[xy]) - ff_clean_intra_table_entries(s); - - if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0) - s->mcsel= get_bits1(&s->gb); - else s->mcsel= 0; - - if ((cbpc & 16) == 0) { - /* 16x16 motion prediction */ - - h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - if(!s->mcsel){ - mx = h263_decode_motion(s, pred_x, s->f_code); - if (mx >= 0xffff) - return -1; - - my = h263_decode_motion(s, pred_y, s->f_code); - if (my >= 0xffff) - return -1; - s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_L0; - } else { - mx = get_amv(s, 0); - my = get_amv(s, 1); - s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0; - } - - mot_val[0 ]= mot_val[2 ] = - mot_val[0+stride]= mot_val[2+stride]= mx; - mot_val[1 ]= mot_val[3 ]= - mot_val[1+stride]= mot_val[3+stride]= my; - } else { - int i; - s->current_picture.mb_type[xy]= MB_TYPE_8x8 | MB_TYPE_L0; - for(i=0;i<4;i++) { - int16_t *mot_val= h263_pred_motion(s, i, 0, &pred_x, &pred_y); - mx = h263_decode_motion(s, pred_x, s->f_code); - if (mx >= 0xffff) - return -1; - - my = h263_decode_motion(s, pred_y, s->f_code); - if (my >= 0xffff) - return -1; - mot_val[0] = mx; - mot_val[1] = my; - } - } - } - } - } - s->mb_x= 0; - } - - return mb_num; -} - -/** - * decode second partition. - * @return <0 if an error occured - */ -static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count){ - int mb_num=0; - static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; - - s->mb_x= s->resync_mb_x; - s->first_slice_line=1; - for(s->mb_y= s->resync_mb_y; mb_num < mb_count; s->mb_y++){ - ff_init_block_index(s); - for(; mb_num < mb_count && s->mb_x<s->mb_width; s->mb_x++){ - const int xy= s->mb_x + s->mb_y*s->mb_stride; - - mb_num++; - ff_update_block_index(s); - if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1) - s->first_slice_line=0; - - if(s->pict_type==I_TYPE){ - int ac_pred= get_bits1(&s->gb); - int cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1); - if(cbpy<0){ - av_log(s->avctx, AV_LOG_ERROR, "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - s->cbp_table[xy]|= cbpy<<2; - s->current_picture.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED; - }else{ /* P || S_TYPE */ - if(IS_INTRA(s->current_picture.mb_type[xy])){ - int dir=0,i; - int ac_pred = get_bits1(&s->gb); - int cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1); - - if(cbpy<0){ - av_log(s->avctx, AV_LOG_ERROR, "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - if(s->cbp_table[xy] & 8) { - ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); - } - s->current_picture.qscale_table[xy]= s->qscale; - - for(i=0; i<6; i++){ - int dc_pred_dir; - int dc= mpeg4_decode_dc(s, i, &dc_pred_dir); - if(dc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "DC corrupted at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - dir<<=1; - if(dc_pred_dir) dir|=1; - } - s->cbp_table[xy]&= 3; //remove dquant - s->cbp_table[xy]|= cbpy<<2; - s->current_picture.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED; - s->pred_dir_table[xy]= dir; - }else if(IS_SKIP(s->current_picture.mb_type[xy])){ - s->current_picture.qscale_table[xy]= s->qscale; - s->cbp_table[xy]= 0; - }else{ - int cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1); - - if(cbpy<0){ - av_log(s->avctx, AV_LOG_ERROR, "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - if(s->cbp_table[xy] & 8) { - ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); - } - s->current_picture.qscale_table[xy]= s->qscale; - - s->cbp_table[xy]&= 3; //remove dquant - s->cbp_table[xy]|= (cbpy^0xf)<<2; - } - } - } - if(mb_num >= mb_count) return 0; - s->mb_x= 0; - } - return 0; -} - -/** - * decodes the first & second partition - * @return <0 if error (and sets error type in the error_status_table) - */ -int ff_mpeg4_decode_partitions(MpegEncContext *s) -{ - int mb_num; - const int part_a_error= s->pict_type==I_TYPE ? (DC_ERROR|MV_ERROR) : MV_ERROR; - const int part_a_end = s->pict_type==I_TYPE ? (DC_END |MV_END) : MV_END; - - mb_num= mpeg4_decode_partition_a(s); - if(mb_num<0){ - ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error); - return -1; - } - - if(s->resync_mb_x + s->resync_mb_y*s->mb_width + mb_num > s->mb_num){ - av_log(s->avctx, AV_LOG_ERROR, "slice below monitor ...\n"); - ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error); - return -1; - } - - s->mb_num_left= mb_num; - - if(s->pict_type==I_TYPE){ - while(show_bits(&s->gb, 9) == 1) - skip_bits(&s->gb, 9); - if(get_bits_long(&s->gb, 19)!=DC_MARKER){ - av_log(s->avctx, AV_LOG_ERROR, "marker missing after first I partition at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - }else{ - while(show_bits(&s->gb, 10) == 1) - skip_bits(&s->gb, 10); - if(get_bits(&s->gb, 17)!=MOTION_MARKER){ - av_log(s->avctx, AV_LOG_ERROR, "marker missing after first P partition at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - } - ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, part_a_end); - - if( mpeg4_decode_partition_b(s, mb_num) < 0){ - if(s->pict_type==P_TYPE) - ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, DC_ERROR); - return -1; - }else{ - if(s->pict_type==P_TYPE) - ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, DC_END); - } - - return 0; -} - -/** - * decode partition C of one MB. - * @return <0 if an error occured - */ -static int mpeg4_decode_partitioned_mb(MpegEncContext *s, DCTELEM block[6][64]) -{ - int cbp, mb_type; - const int xy= s->mb_x + s->mb_y*s->mb_stride; - - mb_type= s->current_picture.mb_type[xy]; - cbp = s->cbp_table[xy]; - - s->use_intra_dc_vlc= s->qscale < s->intra_dc_threshold; - - if(s->current_picture.qscale_table[xy] != s->qscale){ - ff_set_qscale(s, s->current_picture.qscale_table[xy] ); - } - - if (s->pict_type == P_TYPE || s->pict_type==S_TYPE) { - int i; - for(i=0; i<4; i++){ - s->mv[0][i][0] = s->current_picture.motion_val[0][ s->block_index[i] ][0]; - s->mv[0][i][1] = s->current_picture.motion_val[0][ s->block_index[i] ][1]; - } - s->mb_intra = IS_INTRA(mb_type); - - if (IS_SKIP(mb_type)) { - /* skip mb */ - for(i=0;i<6;i++) - s->block_last_index[i] = -1; - s->mv_dir = MV_DIR_FORWARD; - s->mv_type = MV_TYPE_16X16; - if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE){ - s->mcsel=1; - s->mb_skipped = 0; - }else{ - s->mcsel=0; - s->mb_skipped = 1; - } - }else if(s->mb_intra){ - s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]); - }else if(!s->mb_intra){ -// s->mcsel= 0; //FIXME do we need to init that - - s->mv_dir = MV_DIR_FORWARD; - if (IS_8X8(mb_type)) { - s->mv_type = MV_TYPE_8X8; - } else { - s->mv_type = MV_TYPE_16X16; - } - } - } else { /* I-Frame */ - s->mb_intra = 1; - s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]); - } - - if (!IS_SKIP(mb_type)) { - int i; - s->dsp.clear_blocks(s->block[0]); - /* decode each block */ - for (i = 0; i < 6; i++) { - if(mpeg4_decode_block(s, block[i], i, cbp&32, s->mb_intra, s->rvlc) < 0){ - av_log(s->avctx, AV_LOG_ERROR, "texture corrupted at %d %d %d\n", s->mb_x, s->mb_y, s->mb_intra); - return -1; - } - cbp+=cbp; - } - } - - /* per-MB end of slice check */ - - if(--s->mb_num_left <= 0){ -//printf("%06X %d\n", show_bits(&s->gb, 24), s->gb.size_in_bits - get_bits_count(&s->gb)); - if(mpeg4_is_resync(s)) - return SLICE_END; - else - return SLICE_NOEND; - }else{ - if(mpeg4_is_resync(s)){ - const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1; - if(s->cbp_table[xy+delta]) - return SLICE_END; - } - return SLICE_OK; - } -} - -/** - * read the next MVs for OBMC. yes this is a ugly hack, feel free to send a patch :) - */ -static void preview_obmc(MpegEncContext *s){ - GetBitContext gb= s->gb; - - int cbpc, i, pred_x, pred_y, mx, my; - int16_t *mot_val; - const int xy= s->mb_x + 1 + s->mb_y * s->mb_stride; - const int stride= s->b8_stride*2; - - for(i=0; i<4; i++) - s->block_index[i]+= 2; - for(i=4; i<6; i++) - s->block_index[i]+= 1; - s->mb_x++; - - assert(s->pict_type == P_TYPE); - - do{ - if (get_bits1(&s->gb)) { - /* skip mb */ - mot_val = s->current_picture.motion_val[0][ s->block_index[0] ]; - mot_val[0 ]= mot_val[2 ]= - mot_val[0+stride]= mot_val[2+stride]= 0; - mot_val[1 ]= mot_val[3 ]= - mot_val[1+stride]= mot_val[3+stride]= 0; - - s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; - goto end; - } - cbpc = get_vlc2(&s->gb, inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); - }while(cbpc == 20); - - if(cbpc & 4){ - s->current_picture.mb_type[xy]= MB_TYPE_INTRA; - }else{ - get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1); - if (cbpc & 8) { - if(s->modified_quant){ - if(get_bits1(&s->gb)) skip_bits(&s->gb, 1); - else skip_bits(&s->gb, 5); - }else - skip_bits(&s->gb, 2); - } - - if ((cbpc & 16) == 0) { - s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_L0; - /* 16x16 motion prediction */ - mot_val= h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - if (s->umvplus) - mx = h263p_decode_umotion(s, pred_x); - else - mx = h263_decode_motion(s, pred_x, 1); - - if (s->umvplus) - my = h263p_decode_umotion(s, pred_y); - else - my = h263_decode_motion(s, pred_y, 1); - - mot_val[0 ]= mot_val[2 ]= - mot_val[0+stride]= mot_val[2+stride]= mx; - mot_val[1 ]= mot_val[3 ]= - mot_val[1+stride]= mot_val[3+stride]= my; - } else { - s->current_picture.mb_type[xy]= MB_TYPE_8x8 | MB_TYPE_L0; - for(i=0;i<4;i++) { - mot_val = h263_pred_motion(s, i, 0, &pred_x, &pred_y); - if (s->umvplus) - mx = h263p_decode_umotion(s, pred_x); - else - mx = h263_decode_motion(s, pred_x, 1); - - if (s->umvplus) - my = h263p_decode_umotion(s, pred_y); - else - my = h263_decode_motion(s, pred_y, 1); - if (s->umvplus && (mx - pred_x) == 1 && (my - pred_y) == 1) - skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */ - mot_val[0] = mx; - mot_val[1] = my; - } - } - } -end: - - for(i=0; i<4; i++) - s->block_index[i]-= 2; - for(i=4; i<6; i++) - s->block_index[i]-= 1; - s->mb_x--; - - s->gb= gb; -} - -static void h263_decode_dquant(MpegEncContext *s){ - static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; - - if(s->modified_quant){ - if(get_bits1(&s->gb)) - s->qscale= modified_quant_tab[get_bits1(&s->gb)][ s->qscale ]; - else - s->qscale= get_bits(&s->gb, 5); - }else - s->qscale += quant_tab[get_bits(&s->gb, 2)]; - ff_set_qscale(s, s->qscale); -} - -int ff_h263_decode_mb(MpegEncContext *s, - DCTELEM block[6][64]) -{ - int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant; - int16_t *mot_val; - const int xy= s->mb_x + s->mb_y * s->mb_stride; - - assert(!s->h263_pred); - - if (s->pict_type == P_TYPE) { - do{ - if (get_bits1(&s->gb)) { - /* skip mb */ - s->mb_intra = 0; - for(i=0;i<6;i++) - s->block_last_index[i] = -1; - s->mv_dir = MV_DIR_FORWARD; - s->mv_type = MV_TYPE_16X16; - s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; - s->mv[0][0][0] = 0; - s->mv[0][0][1] = 0; - s->mb_skipped = !(s->obmc | s->loop_filter); - goto end; - } - cbpc = get_vlc2(&s->gb, inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); - //fprintf(stderr, "\tCBPC: %d", cbpc); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "cbpc damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - }while(cbpc == 20); - - s->dsp.clear_blocks(s->block[0]); - - dquant = cbpc & 8; - s->mb_intra = ((cbpc & 4) != 0); - if (s->mb_intra) goto intra; - - cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1); - - if(s->alt_inter_vlc==0 || (cbpc & 3)!=3) - cbpy ^= 0xF; - - cbp = (cbpc & 3) | (cbpy << 2); - if (dquant) { - h263_decode_dquant(s); - } - - s->mv_dir = MV_DIR_FORWARD; - if ((cbpc & 16) == 0) { - s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_L0; - /* 16x16 motion prediction */ - s->mv_type = MV_TYPE_16X16; - h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - if (s->umvplus) - mx = h263p_decode_umotion(s, pred_x); - else - mx = h263_decode_motion(s, pred_x, 1); - - if (mx >= 0xffff) - return -1; - - if (s->umvplus) - my = h263p_decode_umotion(s, pred_y); - else - my = h263_decode_motion(s, pred_y, 1); - - if (my >= 0xffff) - return -1; - s->mv[0][0][0] = mx; - s->mv[0][0][1] = my; - - if (s->umvplus && (mx - pred_x) == 1 && (my - pred_y) == 1) - skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */ - } else { - s->current_picture.mb_type[xy]= MB_TYPE_8x8 | MB_TYPE_L0; - s->mv_type = MV_TYPE_8X8; - for(i=0;i<4;i++) { - mot_val = h263_pred_motion(s, i, 0, &pred_x, &pred_y); - if (s->umvplus) - mx = h263p_decode_umotion(s, pred_x); - else - mx = h263_decode_motion(s, pred_x, 1); - if (mx >= 0xffff) - return -1; - - if (s->umvplus) - my = h263p_decode_umotion(s, pred_y); - else - my = h263_decode_motion(s, pred_y, 1); - if (my >= 0xffff) - return -1; - s->mv[0][i][0] = mx; - s->mv[0][i][1] = my; - if (s->umvplus && (mx - pred_x) == 1 && (my - pred_y) == 1) - skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */ - mot_val[0] = mx; - mot_val[1] = my; - } - } - - /* decode each block */ - for (i = 0; i < 6; i++) { - if (h263_decode_block(s, block[i], i, cbp&32) < 0) - return -1; - cbp+=cbp; - } - - if(s->obmc){ - if(s->pict_type == P_TYPE && s->mb_x+1<s->mb_width && s->mb_num_left != 1) - preview_obmc(s); - } - } else if(s->pict_type==B_TYPE) { - int mb_type; - const int stride= s->b8_stride; - int16_t *mot_val0 = s->current_picture.motion_val[0][ 2*(s->mb_x + s->mb_y*stride) ]; - int16_t *mot_val1 = s->current_picture.motion_val[1][ 2*(s->mb_x + s->mb_y*stride) ]; -// const int mv_xy= s->mb_x + 1 + s->mb_y * s->mb_stride; - - //FIXME ugly - mot_val0[0 ]= mot_val0[2 ]= mot_val0[0+2*stride]= mot_val0[2+2*stride]= - mot_val0[1 ]= mot_val0[3 ]= mot_val0[1+2*stride]= mot_val0[3+2*stride]= - mot_val1[0 ]= mot_val1[2 ]= mot_val1[0+2*stride]= mot_val1[2+2*stride]= - mot_val1[1 ]= mot_val1[3 ]= mot_val1[1+2*stride]= mot_val1[3+2*stride]= 0; - - do{ - mb_type= get_vlc2(&s->gb, h263_mbtype_b_vlc.table, H263_MBTYPE_B_VLC_BITS, 2); - if (mb_type < 0){ - av_log(s->avctx, AV_LOG_ERROR, "b mb_type damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - mb_type= h263_mb_type_b_map[ mb_type ]; - }while(!mb_type); - - s->mb_intra = IS_INTRA(mb_type); - if(HAS_CBP(mb_type)){ - s->dsp.clear_blocks(s->block[0]); - cbpc = get_vlc2(&s->gb, cbpc_b_vlc.table, CBPC_B_VLC_BITS, 1); - if(s->mb_intra){ - dquant = IS_QUANT(mb_type); - goto intra; - } - - cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1); - - if (cbpy < 0){ - av_log(s->avctx, AV_LOG_ERROR, "b cbpy damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - if(s->alt_inter_vlc==0 || (cbpc & 3)!=3) - cbpy ^= 0xF; - - cbp = (cbpc & 3) | (cbpy << 2); - }else - cbp=0; - - assert(!s->mb_intra); - - if(IS_QUANT(mb_type)){ - h263_decode_dquant(s); - } - - if(IS_DIRECT(mb_type)){ - s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT; - mb_type |= ff_mpeg4_set_direct_mv(s, 0, 0); - }else{ - s->mv_dir = 0; - s->mv_type= MV_TYPE_16X16; -//FIXME UMV - - if(USES_LIST(mb_type, 0)){ - int16_t *mot_val= h263_pred_motion(s, 0, 0, &mx, &my); - s->mv_dir = MV_DIR_FORWARD; - - mx = h263_decode_motion(s, mx, 1); - my = h263_decode_motion(s, my, 1); - - s->mv[0][0][0] = mx; - s->mv[0][0][1] = my; - mot_val[0 ]= mot_val[2 ]= mot_val[0+2*stride]= mot_val[2+2*stride]= mx; - mot_val[1 ]= mot_val[3 ]= mot_val[1+2*stride]= mot_val[3+2*stride]= my; - } - - if(USES_LIST(mb_type, 1)){ - int16_t *mot_val= h263_pred_motion(s, 0, 1, &mx, &my); - s->mv_dir |= MV_DIR_BACKWARD; - - mx = h263_decode_motion(s, mx, 1); - my = h263_decode_motion(s, my, 1); - - s->mv[1][0][0] = mx; - s->mv[1][0][1] = my; - mot_val[0 ]= mot_val[2 ]= mot_val[0+2*stride]= mot_val[2+2*stride]= mx; - mot_val[1 ]= mot_val[3 ]= mot_val[1+2*stride]= mot_val[3+2*stride]= my; - } - } - - s->current_picture.mb_type[xy]= mb_type; - - /* decode each block */ - for (i = 0; i < 6; i++) { - if (h263_decode_block(s, block[i], i, cbp&32) < 0) - return -1; - cbp+=cbp; - } - } else { /* I-Frame */ - do{ - cbpc = get_vlc2(&s->gb, intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - }while(cbpc == 8); - - s->dsp.clear_blocks(s->block[0]); - - dquant = cbpc & 4; - s->mb_intra = 1; -intra: - s->current_picture.mb_type[xy]= MB_TYPE_INTRA; - if (s->h263_aic) { - s->ac_pred = get_bits1(&s->gb); - if(s->ac_pred){ - s->current_picture.mb_type[xy]= MB_TYPE_INTRA | MB_TYPE_ACPRED; - - s->h263_aic_dir = get_bits1(&s->gb); - } - }else - s->ac_pred = 0; - - cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1); - if(cbpy<0){ - av_log(s->avctx, AV_LOG_ERROR, "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - cbp = (cbpc & 3) | (cbpy << 2); - if (dquant) { - h263_decode_dquant(s); - } - - /* decode each block */ - for (i = 0; i < 6; i++) { - if (h263_decode_block(s, block[i], i, cbp&32) < 0) - return -1; - cbp+=cbp; - } - } -end: - - /* per-MB end of slice check */ - { - int v= show_bits(&s->gb, 16); - - if(get_bits_count(&s->gb) + 16 > s->gb.size_in_bits){ - v>>= get_bits_count(&s->gb) + 16 - s->gb.size_in_bits; - } - - if(v==0) - return SLICE_END; - } - - return SLICE_OK; -} - -int ff_mpeg4_decode_mb(MpegEncContext *s, - DCTELEM block[6][64]) -{ - int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant; - int16_t *mot_val; - static int8_t quant_tab[4] = { -1, -2, 1, 2 }; - const int xy= s->mb_x + s->mb_y * s->mb_stride; - - assert(s->h263_pred); - - if (s->pict_type == P_TYPE || s->pict_type==S_TYPE) { - do{ - if (get_bits1(&s->gb)) { - /* skip mb */ - s->mb_intra = 0; - for(i=0;i<6;i++) - s->block_last_index[i] = -1; - s->mv_dir = MV_DIR_FORWARD; - s->mv_type = MV_TYPE_16X16; - if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE){ - s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0; - s->mcsel=1; - s->mv[0][0][0]= get_amv(s, 0); - s->mv[0][0][1]= get_amv(s, 1); - - s->mb_skipped = 0; - }else{ - s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; - s->mcsel=0; - s->mv[0][0][0] = 0; - s->mv[0][0][1] = 0; - s->mb_skipped = 1; - } - goto end; - } - cbpc = get_vlc2(&s->gb, inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); - //fprintf(stderr, "\tCBPC: %d", cbpc); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "cbpc damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - }while(cbpc == 20); - - s->dsp.clear_blocks(s->block[0]); - dquant = cbpc & 8; - s->mb_intra = ((cbpc & 4) != 0); - if (s->mb_intra) goto intra; - - if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0) - s->mcsel= get_bits1(&s->gb); - else s->mcsel= 0; - cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1) ^ 0x0F; - - cbp = (cbpc & 3) | (cbpy << 2); - if (dquant) { - ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); - } - if((!s->progressive_sequence) && (cbp || (s->workaround_bugs&FF_BUG_XVID_ILACE))) - s->interlaced_dct= get_bits1(&s->gb); - - s->mv_dir = MV_DIR_FORWARD; - if ((cbpc & 16) == 0) { - if(s->mcsel){ - s->current_picture.mb_type[xy]= MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0; - /* 16x16 global motion prediction */ - s->mv_type = MV_TYPE_16X16; - mx= get_amv(s, 0); - my= get_amv(s, 1); - s->mv[0][0][0] = mx; - s->mv[0][0][1] = my; - }else if((!s->progressive_sequence) && get_bits1(&s->gb)){ - s->current_picture.mb_type[xy]= MB_TYPE_16x8 | MB_TYPE_L0 | MB_TYPE_INTERLACED; - /* 16x8 field motion prediction */ - s->mv_type= MV_TYPE_FIELD; - - s->field_select[0][0]= get_bits1(&s->gb); - s->field_select[0][1]= get_bits1(&s->gb); - - h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - - for(i=0; i<2; i++){ - mx = h263_decode_motion(s, pred_x, s->f_code); - if (mx >= 0xffff) - return -1; - - my = h263_decode_motion(s, pred_y/2, s->f_code); - if (my >= 0xffff) - return -1; - - s->mv[0][i][0] = mx; - s->mv[0][i][1] = my; - } - }else{ - s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_L0; - /* 16x16 motion prediction */ - s->mv_type = MV_TYPE_16X16; - h263_pred_motion(s, 0, 0, &pred_x, &pred_y); - mx = h263_decode_motion(s, pred_x, s->f_code); - - if (mx >= 0xffff) - return -1; - - my = h263_decode_motion(s, pred_y, s->f_code); - - if (my >= 0xffff) - return -1; - s->mv[0][0][0] = mx; - s->mv[0][0][1] = my; - } - } else { - s->current_picture.mb_type[xy]= MB_TYPE_8x8 | MB_TYPE_L0; - s->mv_type = MV_TYPE_8X8; - for(i=0;i<4;i++) { - mot_val = h263_pred_motion(s, i, 0, &pred_x, &pred_y); - mx = h263_decode_motion(s, pred_x, s->f_code); - if (mx >= 0xffff) - return -1; - - my = h263_decode_motion(s, pred_y, s->f_code); - if (my >= 0xffff) - return -1; - s->mv[0][i][0] = mx; - s->mv[0][i][1] = my; - mot_val[0] = mx; - mot_val[1] = my; - } - } - } else if(s->pict_type==B_TYPE) { - int modb1; // first bit of modb - int modb2; // second bit of modb - int mb_type; - - s->mb_intra = 0; //B-frames never contain intra blocks - s->mcsel=0; // ... true gmc blocks - - if(s->mb_x==0){ - for(i=0; i<2; i++){ - s->last_mv[i][0][0]= - s->last_mv[i][0][1]= - s->last_mv[i][1][0]= - s->last_mv[i][1][1]= 0; - } - } - - /* if we skipped it in the future P Frame than skip it now too */ - s->mb_skipped= s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC - - if(s->mb_skipped){ - /* skip mb */ - for(i=0;i<6;i++) - s->block_last_index[i] = -1; - - s->mv_dir = MV_DIR_FORWARD; - s->mv_type = MV_TYPE_16X16; - s->mv[0][0][0] = 0; - s->mv[0][0][1] = 0; - s->mv[1][0][0] = 0; - s->mv[1][0][1] = 0; - s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; - goto end; - } - - modb1= get_bits1(&s->gb); - if(modb1){ - mb_type= MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_L0L1; //like MB_TYPE_B_DIRECT but no vectors coded - cbp=0; - }else{ - modb2= get_bits1(&s->gb); - mb_type= get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1); - if(mb_type<0){ - av_log(s->avctx, AV_LOG_ERROR, "illegal MB_type\n"); - return -1; - } - mb_type= mb_type_b_map[ mb_type ]; - if(modb2) cbp= 0; - else{ - s->dsp.clear_blocks(s->block[0]); - cbp= get_bits(&s->gb, 6); - } - - if ((!IS_DIRECT(mb_type)) && cbp) { - if(get_bits1(&s->gb)){ - ff_set_qscale(s, s->qscale + get_bits1(&s->gb)*4 - 2); - } - } - - if(!s->progressive_sequence){ - if(cbp) - s->interlaced_dct= get_bits1(&s->gb); - - if(!IS_DIRECT(mb_type) && get_bits1(&s->gb)){ - mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; - mb_type &= ~MB_TYPE_16x16; - - if(USES_LIST(mb_type, 0)){ - s->field_select[0][0]= get_bits1(&s->gb); - s->field_select[0][1]= get_bits1(&s->gb); - } - if(USES_LIST(mb_type, 1)){ - s->field_select[1][0]= get_bits1(&s->gb); - s->field_select[1][1]= get_bits1(&s->gb); - } - } - } - - s->mv_dir = 0; - if((mb_type & (MB_TYPE_DIRECT2|MB_TYPE_INTERLACED)) == 0){ - s->mv_type= MV_TYPE_16X16; - - if(USES_LIST(mb_type, 0)){ - s->mv_dir = MV_DIR_FORWARD; - - mx = h263_decode_motion(s, s->last_mv[0][0][0], s->f_code); - my = h263_decode_motion(s, s->last_mv[0][0][1], s->f_code); - s->last_mv[0][1][0]= s->last_mv[0][0][0]= s->mv[0][0][0] = mx; - s->last_mv[0][1][1]= s->last_mv[0][0][1]= s->mv[0][0][1] = my; - } - - if(USES_LIST(mb_type, 1)){ - s->mv_dir |= MV_DIR_BACKWARD; - - mx = h263_decode_motion(s, s->last_mv[1][0][0], s->b_code); - my = h263_decode_motion(s, s->last_mv[1][0][1], s->b_code); - s->last_mv[1][1][0]= s->last_mv[1][0][0]= s->mv[1][0][0] = mx; - s->last_mv[1][1][1]= s->last_mv[1][0][1]= s->mv[1][0][1] = my; - } - }else if(!IS_DIRECT(mb_type)){ - s->mv_type= MV_TYPE_FIELD; - - if(USES_LIST(mb_type, 0)){ - s->mv_dir = MV_DIR_FORWARD; - - for(i=0; i<2; i++){ - mx = h263_decode_motion(s, s->last_mv[0][i][0] , s->f_code); - my = h263_decode_motion(s, s->last_mv[0][i][1]/2, s->f_code); - s->last_mv[0][i][0]= s->mv[0][i][0] = mx; - s->last_mv[0][i][1]= (s->mv[0][i][1] = my)*2; - } - } - - if(USES_LIST(mb_type, 1)){ - s->mv_dir |= MV_DIR_BACKWARD; - - for(i=0; i<2; i++){ - mx = h263_decode_motion(s, s->last_mv[1][i][0] , s->b_code); - my = h263_decode_motion(s, s->last_mv[1][i][1]/2, s->b_code); - s->last_mv[1][i][0]= s->mv[1][i][0] = mx; - s->last_mv[1][i][1]= (s->mv[1][i][1] = my)*2; - } - } - } - } - - if(IS_DIRECT(mb_type)){ - if(IS_SKIP(mb_type)) - mx=my=0; - else{ - mx = h263_decode_motion(s, 0, 1); - my = h263_decode_motion(s, 0, 1); - } - - s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT; - mb_type |= ff_mpeg4_set_direct_mv(s, mx, my); - } - s->current_picture.mb_type[xy]= mb_type; - } else { /* I-Frame */ - do{ - cbpc = get_vlc2(&s->gb, intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); - if (cbpc < 0){ - av_log(s->avctx, AV_LOG_ERROR, "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - }while(cbpc == 8); - - dquant = cbpc & 4; - s->mb_intra = 1; -intra: - s->ac_pred = get_bits1(&s->gb); - if(s->ac_pred) - s->current_picture.mb_type[xy]= MB_TYPE_INTRA | MB_TYPE_ACPRED; - else - s->current_picture.mb_type[xy]= MB_TYPE_INTRA; - - cbpy = get_vlc2(&s->gb, cbpy_vlc.table, CBPY_VLC_BITS, 1); - if(cbpy<0){ - av_log(s->avctx, AV_LOG_ERROR, "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - cbp = (cbpc & 3) | (cbpy << 2); - - s->use_intra_dc_vlc= s->qscale < s->intra_dc_threshold; - - if (dquant) { - ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); - } - - if(!s->progressive_sequence) - s->interlaced_dct= get_bits1(&s->gb); - - s->dsp.clear_blocks(s->block[0]); - /* decode each block */ - for (i = 0; i < 6; i++) { - if (mpeg4_decode_block(s, block[i], i, cbp&32, 1, 0) < 0) - return -1; - cbp+=cbp; - } - goto end; - } - - /* decode each block */ - for (i = 0; i < 6; i++) { - if (mpeg4_decode_block(s, block[i], i, cbp&32, 0, 0) < 0) - return -1; - cbp+=cbp; - } -end: - - /* per-MB end of slice check */ - if(s->codec_id==CODEC_ID_MPEG4){ - if(mpeg4_is_resync(s)){ - const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1; - if(s->pict_type==B_TYPE && s->next_picture.mbskip_table[xy + delta]) - return SLICE_OK; - return SLICE_END; - } - } - - return SLICE_OK; -} - -static int h263_decode_motion(MpegEncContext * s, int pred, int f_code) -{ - int code, val, sign, shift, l; - code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2); - - if (code == 0) - return pred; - if (code < 0) - return 0xffff; - - sign = get_bits1(&s->gb); - shift = f_code - 1; - val = code; - if (shift) { - val = (val - 1) << shift; - val |= get_bits(&s->gb, shift); - val++; - } - if (sign) - val = -val; - val += pred; - - /* modulo decoding */ - if (!s->h263_long_vectors) { - l = INT_BIT - 5 - f_code; - val = (val<<l)>>l; - } else { - /* horrible h263 long vector mode */ - if (pred < -31 && val < -63) - val += 64; - if (pred > 32 && val > 63) - val -= 64; - - } - return val; -} - -/* Decodes RVLC of H.263+ UMV */ -static int h263p_decode_umotion(MpegEncContext * s, int pred) -{ - int code = 0, sign; - - if (get_bits1(&s->gb)) /* Motion difference = 0 */ - return pred; - - code = 2 + get_bits1(&s->gb); - - while (get_bits1(&s->gb)) - { - code <<= 1; - code += get_bits1(&s->gb); - } - sign = code & 1; - code >>= 1; - - code = (sign) ? (pred - code) : (pred + code); -#ifdef DEBUG - av_log( s->avctx, AV_LOG_DEBUG,"H.263+ UMV Motion = %d\n", code); -#endif - return code; - -} - -static int h263_decode_block(MpegEncContext * s, DCTELEM * block, - int n, int coded) -{ - int code, level, i, j, last, run; - RLTable *rl = &rl_inter; - const uint8_t *scan_table; - GetBitContext gb= s->gb; - - scan_table = s->intra_scantable.permutated; - if (s->h263_aic && s->mb_intra) { - rl = &rl_intra_aic; - i = 0; - if (s->ac_pred) { - if (s->h263_aic_dir) - scan_table = s->intra_v_scantable.permutated; /* left */ - else - scan_table = s->intra_h_scantable.permutated; /* top */ - } - } else if (s->mb_intra) { - /* DC coef */ - if(s->codec_id == CODEC_ID_RV10){ -#ifdef CONFIG_RV10_DECODER - if (s->rv10_version == 3 && s->pict_type == I_TYPE) { - int component, diff; - component = (n <= 3 ? 0 : n - 4 + 1); - level = s->last_dc[component]; - if (s->rv10_first_dc_coded[component]) { - diff = rv_decode_dc(s, n); - if (diff == 0xffff) - return -1; - level += diff; - level = level & 0xff; /* handle wrap round */ - s->last_dc[component] = level; - } else { - s->rv10_first_dc_coded[component] = 1; - } - } else { - level = get_bits(&s->gb, 8); - if (level == 255) - level = 128; - } -#endif - }else{ - level = get_bits(&s->gb, 8); - if((level&0x7F) == 0){ - av_log(s->avctx, AV_LOG_ERROR, "illegal dc %d at %d %d\n", level, s->mb_x, s->mb_y); - if(s->error_resilience >= FF_ER_COMPLIANT) - return -1; - } - if (level == 255) - level = 128; - } - block[0] = level; - i = 1; - } else { - i = 0; - } - if (!coded) { - if (s->mb_intra && s->h263_aic) - goto not_coded; - s->block_last_index[n] = i - 1; - return 0; - } -retry: - for(;;) { - code = get_vlc2(&s->gb, rl->vlc.table, TEX_VLC_BITS, 2); - if (code < 0){ - av_log(s->avctx, AV_LOG_ERROR, "illegal ac vlc code at %dx%d\n", s->mb_x, s->mb_y); - return -1; - } - if (code == rl->n) { - /* escape */ - if (s->h263_flv > 1) { - int is11 = get_bits1(&s->gb); - last = get_bits1(&s->gb); - run = get_bits(&s->gb, 6); - if(is11){ - level = get_sbits(&s->gb, 11); - } else { - level = get_sbits(&s->gb, 7); - } - } else { - last = get_bits1(&s->gb); - run = get_bits(&s->gb, 6); - level = (int8_t)get_bits(&s->gb, 8); - if(level == -128){ - if (s->codec_id == CODEC_ID_RV10) { - /* XXX: should patch encoder too */ - level = get_sbits(&s->gb, 12); - }else{ - level = get_bits(&s->gb, 5); - level |= get_sbits(&s->gb, 6)<<5; - } - } - } - } else { - run = rl->table_run[code]; - level = rl->table_level[code]; - last = code >= rl->last; - if (get_bits1(&s->gb)) - level = -level; - } - i += run; - if (i >= 64){ - if(s->alt_inter_vlc && rl == &rl_inter && !s->mb_intra){ - //looks like a hack but no, it's the way its supposed to work ... - rl = &rl_intra_aic; - i = 0; - s->gb= gb; - memset(block, 0, sizeof(DCTELEM)*64); - goto retry; - } - av_log(s->avctx, AV_LOG_ERROR, "run overflow at %dx%d i:%d\n", s->mb_x, s->mb_y, s->mb_intra); - return -1; - } - j = scan_table[i]; - block[j] = level; - if (last) - break; - i++; - } -not_coded: - if (s->mb_intra && s->h263_aic) { - h263_pred_acdc(s, block, n); - i = 63; - } - s->block_last_index[n] = i; - return 0; -} - -/** - * decodes the dc value. - * @param n block index (0-3 are luma, 4-5 are chroma) - * @param dir_ptr the prediction direction will be stored here - * @return the quantized dc - */ -static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) -{ - int level, code; - - if (n < 4) - code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1); - else - code = get_vlc2(&s->gb, dc_chrom.table, DC_VLC_BITS, 1); - if (code < 0 || code > 9 /* && s->nbit<9 */){ - av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); - return -1; - } - if (code == 0) { - level = 0; - } else { - if(IS_3IV1){ - if(code==1) - level= 2*get_bits1(&s->gb)-1; - else{ - if(get_bits1(&s->gb)) - level = get_bits(&s->gb, code-1) + (1<<(code-1)); - else - level = -get_bits(&s->gb, code-1) - (1<<(code-1)); - } - }else{ - level = get_xbits(&s->gb, code); - } - - if (code > 8){ - if(get_bits1(&s->gb)==0){ /* marker */ - if(s->error_resilience>=2){ - av_log(s->avctx, AV_LOG_ERROR, "dc marker bit missing\n"); - return -1; - } - } - } - } - - return ff_mpeg4_pred_dc(s, n, level, dir_ptr, 0); -} - -/** - * decodes a block. - * @return <0 if an error occured - */ -static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block, - int n, int coded, int intra, int rvlc) -{ - int level, i, last, run; - int dc_pred_dir; - RLTable * rl; - RL_VLC_ELEM * rl_vlc; - const uint8_t * scan_table; - int qmul, qadd; - - //Note intra & rvlc should be optimized away if this is inlined - - if(intra) { - if(s->use_intra_dc_vlc){ - /* DC coef */ - if(s->partitioned_frame){ - level = s->dc_val[0][ s->block_index[n] ]; - if(n<4) level= FASTDIV((level + (s->y_dc_scale>>1)), s->y_dc_scale); - else level= FASTDIV((level + (s->c_dc_scale>>1)), s->c_dc_scale); - dc_pred_dir= (s->pred_dir_table[s->mb_x + s->mb_y*s->mb_stride]<<n)&32; - }else{ - level = mpeg4_decode_dc(s, n, &dc_pred_dir); - if (level < 0) - return -1; - } - block[0] = level; - i = 0; - }else{ - i = -1; - ff_mpeg4_pred_dc(s, n, 0, &dc_pred_dir, 0); - } - if (!coded) - goto not_coded; - - if(rvlc){ - rl = &rvlc_rl_intra; - rl_vlc = rvlc_rl_intra.rl_vlc[0]; - }else{ - rl = &rl_intra; - rl_vlc = rl_intra.rl_vlc[0]; - } - if (s->ac_pred) { - if (dc_pred_dir == 0) - scan_table = s->intra_v_scantable.permutated; /* left */ - else - scan_table = s->intra_h_scantable.permutated; /* top */ - } else { - scan_table = s->intra_scantable.permutated; - } - qmul=1; - qadd=0; - } else { - i = -1; - if (!coded) { - s->block_last_index[n] = i; - return 0; - } - if(rvlc) rl = &rvlc_rl_inter; - else rl = &rl_inter; - - scan_table = s->intra_scantable.permutated; - - if(s->mpeg_quant){ - qmul=1; - qadd=0; - if(rvlc){ - rl_vlc = rvlc_rl_inter.rl_vlc[0]; - }else{ - rl_vlc = rl_inter.rl_vlc[0]; - } - }else{ - qmul = s->qscale << 1; - qadd = (s->qscale - 1) | 1; - if(rvlc){ - rl_vlc = rvlc_rl_inter.rl_vlc[s->qscale]; - }else{ - rl_vlc = rl_inter.rl_vlc[s->qscale]; - } - } - } - { - OPEN_READER(re, &s->gb); - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0); - if (level==0) { - /* escape */ - if(rvlc){ - if(SHOW_UBITS(re, &s->gb, 1)==0){ - av_log(s->avctx, AV_LOG_ERROR, "1. marker bit missing in rvlc esc\n"); - return -1; - }; SKIP_CACHE(re, &s->gb, 1); - - last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); - run= SHOW_UBITS(re, &s->gb, 6); LAST_SKIP_CACHE(re, &s->gb, 6); - SKIP_COUNTER(re, &s->gb, 1+1+6); - UPDATE_CACHE(re, &s->gb); - - if(SHOW_UBITS(re, &s->gb, 1)==0){ - av_log(s->avctx, AV_LOG_ERROR, "2. marker bit missing in rvlc esc\n"); - return -1; - }; SKIP_CACHE(re, &s->gb, 1); - - level= SHOW_UBITS(re, &s->gb, 11); SKIP_CACHE(re, &s->gb, 11); - - if(SHOW_UBITS(re, &s->gb, 5)!=0x10){ - av_log(s->avctx, AV_LOG_ERROR, "reverse esc missing\n"); - return -1; - }; SKIP_CACHE(re, &s->gb, 5); - - level= level * qmul + qadd; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); LAST_SKIP_CACHE(re, &s->gb, 1); - SKIP_COUNTER(re, &s->gb, 1+11+5+1); - - i+= run + 1; - if(last) i+=192; - }else{ - int cache; - cache= GET_CACHE(re, &s->gb); - - if(IS_3IV1) - cache ^= 0xC0000000; - - if (cache&0x80000000) { - if (cache&0x40000000) { - /* third escape */ - SKIP_CACHE(re, &s->gb, 2); - last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); - run= SHOW_UBITS(re, &s->gb, 6); LAST_SKIP_CACHE(re, &s->gb, 6); - SKIP_COUNTER(re, &s->gb, 2+1+6); - UPDATE_CACHE(re, &s->gb); - - if(IS_3IV1){ - level= SHOW_SBITS(re, &s->gb, 12); LAST_SKIP_BITS(re, &s->gb, 12); - }else{ - if(SHOW_UBITS(re, &s->gb, 1)==0){ - av_log(s->avctx, AV_LOG_ERROR, "1. marker bit missing in 3. esc\n"); - return -1; - }; SKIP_CACHE(re, &s->gb, 1); - - level= SHOW_SBITS(re, &s->gb, 12); SKIP_CACHE(re, &s->gb, 12); - - if(SHOW_UBITS(re, &s->gb, 1)==0){ - av_log(s->avctx, AV_LOG_ERROR, "2. marker bit missing in 3. esc\n"); - return -1; - }; LAST_SKIP_CACHE(re, &s->gb, 1); - - SKIP_COUNTER(re, &s->gb, 1+12+1); - } - -#if 0 - if(s->error_resilience >= FF_ER_COMPLIANT){ - const int abs_level= FFABS(level); - if(abs_level<=MAX_LEVEL && run<=MAX_RUN){ - const int run1= run - rl->max_run[last][abs_level] - 1; - if(abs_level <= rl->max_level[last][run]){ - av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n"); - return -1; - } - if(s->error_resilience > FF_ER_COMPLIANT){ - if(abs_level <= rl->max_level[last][run]*2){ - av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n"); - return -1; - } - if(run1 >= 0 && abs_level <= rl->max_level[last][run1]){ - av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n"); - return -1; - } - } - } - } -#endif - if (level>0) level= level * qmul + qadd; - else level= level * qmul - qadd; - - if((unsigned)(level + 2048) > 4095){ - if(s->error_resilience > FF_ER_COMPLIANT){ - if(level > 2560 || level<-2560){ - av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc, qp=%d\n", s->qscale); - return -1; - } - } - level= level<0 ? -2048 : 2047; - } - - i+= run + 1; - if(last) i+=192; - } else { - /* second escape */ -#if MIN_CACHE_BITS < 20 - LAST_SKIP_BITS(re, &s->gb, 2); - UPDATE_CACHE(re, &s->gb); -#else - SKIP_BITS(re, &s->gb, 2); -#endif - GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); - i+= run + rl->max_run[run>>7][level/qmul] +1; //FIXME opt indexing - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } - } else { - /* first escape */ -#if MIN_CACHE_BITS < 19 - LAST_SKIP_BITS(re, &s->gb, 1); - UPDATE_CACHE(re, &s->gb); -#else - SKIP_BITS(re, &s->gb, 1); -#endif - GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); - i+= run; - level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } - } - } else { - i+= run; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } - if (i > 62){ - i-= 192; - if(i&(~63)){ - av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - block[scan_table[i]] = level; - break; - } - - block[scan_table[i]] = level; - } - CLOSE_READER(re, &s->gb); - } - not_coded: - if (intra) { - if(!s->use_intra_dc_vlc){ - block[0] = ff_mpeg4_pred_dc(s, n, block[0], &dc_pred_dir, 0); - - i -= i>>31; //if(i == -1) i=0; - } - - mpeg4_pred_ac(s, block, n, dc_pred_dir); - if (s->ac_pred) { - i = 63; /* XXX: not optimal */ - } - } - s->block_last_index[n] = i; - return 0; -} - -/* most is hardcoded. should extend to handle all h263 streams */ -int h263_decode_picture_header(MpegEncContext *s) -{ - int format, width, height, i; - uint32_t startcode; - - align_get_bits(&s->gb); - - startcode= get_bits(&s->gb, 22-8); - - for(i= s->gb.size_in_bits - get_bits_count(&s->gb); i>24; i-=8) { - startcode = ((startcode << 8) | get_bits(&s->gb, 8)) & 0x003FFFFF; - - if(startcode == 0x20) - break; - } - - if (startcode != 0x20) { - av_log(s->avctx, AV_LOG_ERROR, "Bad picture start code\n"); - return -1; - } - /* temporal reference */ - i = get_bits(&s->gb, 8); /* picture timestamp */ - if( (s->picture_number&~0xFF)+i < s->picture_number) - i+= 256; - s->current_picture_ptr->pts= - s->picture_number= (s->picture_number&~0xFF) + i; - - /* PTYPE starts here */ - if (get_bits1(&s->gb) != 1) { - /* marker */ - av_log(s->avctx, AV_LOG_ERROR, "Bad marker\n"); - return -1; - } - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "Bad H263 id\n"); - return -1; /* h263 id */ - } - skip_bits1(&s->gb); /* split screen off */ - skip_bits1(&s->gb); /* camera off */ - skip_bits1(&s->gb); /* freeze picture release off */ - - format = get_bits(&s->gb, 3); - /* - 0 forbidden - 1 sub-QCIF - 10 QCIF - 7 extended PTYPE (PLUSPTYPE) - */ - - if (format != 7 && format != 6) { - s->h263_plus = 0; - /* H.263v1 */ - width = h263_format[format][0]; - height = h263_format[format][1]; - if (!width) - return -1; - - s->pict_type = I_TYPE + get_bits1(&s->gb); - - s->h263_long_vectors = get_bits1(&s->gb); - - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "H263 SAC not supported\n"); - return -1; /* SAC: off */ - } - s->obmc= get_bits1(&s->gb); /* Advanced prediction mode */ - s->unrestricted_mv = s->h263_long_vectors || s->obmc; - - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "H263 PB frame not supported\n"); - return -1; /* not PB frame */ - } - s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); - skip_bits1(&s->gb); /* Continuous Presence Multipoint mode: off */ - - s->width = width; - s->height = height; - s->avctx->sample_aspect_ratio= (AVRational){12,11}; - s->avctx->time_base= (AVRational){1001, 30000}; - } else { - int ufep; - - /* H.263v2 */ - s->h263_plus = 1; - ufep = get_bits(&s->gb, 3); /* Update Full Extended PTYPE */ - - /* ufep other than 0 and 1 are reserved */ - if (ufep == 1) { - /* OPPTYPE */ - format = get_bits(&s->gb, 3); - dprintf(s->avctx, "ufep=1, format: %d\n", format); - s->custom_pcf= get_bits1(&s->gb); - s->umvplus = get_bits(&s->gb, 1); /* Unrestricted Motion Vector */ - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "Syntax-based Arithmetic Coding (SAC) not supported\n"); - } - s->obmc= get_bits1(&s->gb); /* Advanced prediction mode */ - s->h263_aic = get_bits1(&s->gb); /* Advanced Intra Coding (AIC) */ - s->loop_filter= get_bits1(&s->gb); - s->unrestricted_mv = s->umvplus || s->obmc || s->loop_filter; - - s->h263_slice_structured= get_bits1(&s->gb); - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "Reference Picture Selection not supported\n"); - } - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "Independent Segment Decoding not supported\n"); - } - s->alt_inter_vlc= get_bits1(&s->gb); - s->modified_quant= get_bits1(&s->gb); - if(s->modified_quant) - s->chroma_qscale_table= ff_h263_chroma_qscale_table; - - skip_bits(&s->gb, 1); /* Prevent start code emulation */ - - skip_bits(&s->gb, 3); /* Reserved */ - } else if (ufep != 0) { - av_log(s->avctx, AV_LOG_ERROR, "Bad UFEP type (%d)\n", ufep); - return -1; - } - - /* MPPTYPE */ - s->pict_type = get_bits(&s->gb, 3); - switch(s->pict_type){ - case 0: s->pict_type= I_TYPE;break; - case 1: s->pict_type= P_TYPE;break; - case 3: s->pict_type= B_TYPE;break; - case 7: s->pict_type= I_TYPE;break; //ZYGO - default: - return -1; - } - skip_bits(&s->gb, 2); - s->no_rounding = get_bits1(&s->gb); - skip_bits(&s->gb, 4); - - /* Get the picture dimensions */ - if (ufep) { - if (format == 6) { - /* Custom Picture Format (CPFMT) */ - s->aspect_ratio_info = get_bits(&s->gb, 4); - dprintf(s->avctx, "aspect: %d\n", s->aspect_ratio_info); - /* aspect ratios: - 0 - forbidden - 1 - 1:1 - 2 - 12:11 (CIF 4:3) - 3 - 10:11 (525-type 4:3) - 4 - 16:11 (CIF 16:9) - 5 - 40:33 (525-type 16:9) - 6-14 - reserved - */ - width = (get_bits(&s->gb, 9) + 1) * 4; - skip_bits1(&s->gb); - height = get_bits(&s->gb, 9) * 4; - dprintf(s->avctx, "\nH.263+ Custom picture: %dx%d\n",width,height); - if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) { - /* aspected dimensions */ - s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 8); - s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 8); - }else{ - s->avctx->sample_aspect_ratio= pixel_aspect[s->aspect_ratio_info]; - } - } else { - width = h263_format[format][0]; - height = h263_format[format][1]; - s->avctx->sample_aspect_ratio= (AVRational){12,11}; - } - if ((width == 0) || (height == 0)) - return -1; - s->width = width; - s->height = height; - - if(s->custom_pcf){ - int gcd; - s->avctx->time_base.den= 1800000; - s->avctx->time_base.num= 1000 + get_bits1(&s->gb); - s->avctx->time_base.num*= get_bits(&s->gb, 7); - if(s->avctx->time_base.num == 0){ - av_log(s, AV_LOG_ERROR, "zero framerate\n"); - return -1; - } - gcd= ff_gcd(s->avctx->time_base.den, s->avctx->time_base.num); - s->avctx->time_base.den /= gcd; - s->avctx->time_base.num /= gcd; -// av_log(s->avctx, AV_LOG_DEBUG, "%d/%d\n", s->avctx->time_base.den, s->avctx->time_base.num); - }else{ - s->avctx->time_base= (AVRational){1001, 30000}; - } - } - - if(s->custom_pcf){ - skip_bits(&s->gb, 2); //extended Temporal reference - } - - if (ufep) { - if (s->umvplus) { - if(get_bits1(&s->gb)==0) /* Unlimited Unrestricted Motion Vectors Indicator (UUI) */ - skip_bits1(&s->gb); - } - if(s->h263_slice_structured){ - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "rectangular slices not supported\n"); - } - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "unordered slices not supported\n"); - } - } - } - - s->qscale = get_bits(&s->gb, 5); - } - - s->mb_width = (s->width + 15) / 16; - s->mb_height = (s->height + 15) / 16; - s->mb_num = s->mb_width * s->mb_height; - - /* PEI */ - while (get_bits1(&s->gb) != 0) { - skip_bits(&s->gb, 8); - } - - if(s->h263_slice_structured){ - if (get_bits1(&s->gb) != 1) { - av_log(s->avctx, AV_LOG_ERROR, "SEPB1 marker missing\n"); - return -1; - } - - ff_h263_decode_mba(s); - - if (get_bits1(&s->gb) != 1) { - av_log(s->avctx, AV_LOG_ERROR, "SEPB2 marker missing\n"); - return -1; - } - } - s->f_code = 1; - - if(s->h263_aic){ - s->y_dc_scale_table= - s->c_dc_scale_table= ff_aic_dc_scale_table; - }else{ - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; - } - - if(s->avctx->debug&FF_DEBUG_PICT_INFO){ - av_log(s->avctx, AV_LOG_DEBUG, "qp:%d %c size:%d rnd:%d%s%s%s%s%s%s%s%s%s %d/%d\n", - s->qscale, av_get_pict_type_char(s->pict_type), - s->gb.size_in_bits, 1-s->no_rounding, - s->obmc ? " AP" : "", - s->umvplus ? " UMV" : "", - s->h263_long_vectors ? " LONG" : "", - s->h263_plus ? " +" : "", - s->h263_aic ? " AIC" : "", - s->alt_inter_vlc ? " AIV" : "", - s->modified_quant ? " MQ" : "", - s->loop_filter ? " LOOP" : "", - s->h263_slice_structured ? " SS" : "", - s->avctx->time_base.den, s->avctx->time_base.num - ); - } -#if 1 - if (s->pict_type == I_TYPE && s->codec_tag == ff_get_fourcc("ZYGO")){ - int i,j; - for(i=0; i<85; i++) av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb)); - av_log(s->avctx, AV_LOG_DEBUG, "\n"); - for(i=0; i<13; i++){ - for(j=0; j<3; j++){ - int v= get_bits(&s->gb, 8); - v |= get_sbits(&s->gb, 8)<<8; - av_log(s->avctx, AV_LOG_DEBUG, " %5d", v); - } - av_log(s->avctx, AV_LOG_DEBUG, "\n"); - } - for(i=0; i<50; i++) av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb)); - } -#endif - - return 0; -} - -static void mpeg4_decode_sprite_trajectory(MpegEncContext * s, GetBitContext *gb) -{ - int i; - int a= 2<<s->sprite_warping_accuracy; - int rho= 3-s->sprite_warping_accuracy; - int r=16/a; - const int vop_ref[4][2]= {{0,0}, {s->width,0}, {0, s->height}, {s->width, s->height}}; // only true for rectangle shapes - int d[4][2]={{0,0}, {0,0}, {0,0}, {0,0}}; - int sprite_ref[4][2]; - int virtual_ref[2][2]; - int w2, h2, w3, h3; - int alpha=0, beta=0; - int w= s->width; - int h= s->height; - int min_ab; - - for(i=0; i<s->num_sprite_warping_points; i++){ - int length; - int x=0, y=0; - - length= get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); - if(length){ - x= get_xbits(gb, length); - } - if(!(s->divx_version==500 && s->divx_build==413)) skip_bits1(gb); /* marker bit */ - - length= get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); - if(length){ - y=get_xbits(gb, length); - } - skip_bits1(gb); /* marker bit */ -//printf("%d %d %d %d\n", x, y, i, s->sprite_warping_accuracy); - d[i][0]= x; - d[i][1]= y; - } - - while((1<<alpha)<w) alpha++; - while((1<<beta )<h) beta++; // there seems to be a typo in the mpeg4 std for the definition of w' and h' - w2= 1<<alpha; - h2= 1<<beta; - -// Note, the 4th point isn't used for GMC - if(s->divx_version==500 && s->divx_build==413){ - sprite_ref[0][0]= a*vop_ref[0][0] + d[0][0]; - sprite_ref[0][1]= a*vop_ref[0][1] + d[0][1]; - sprite_ref[1][0]= a*vop_ref[1][0] + d[0][0] + d[1][0]; - sprite_ref[1][1]= a*vop_ref[1][1] + d[0][1] + d[1][1]; - sprite_ref[2][0]= a*vop_ref[2][0] + d[0][0] + d[2][0]; - sprite_ref[2][1]= a*vop_ref[2][1] + d[0][1] + d[2][1]; - } else { - sprite_ref[0][0]= (a>>1)*(2*vop_ref[0][0] + d[0][0]); - sprite_ref[0][1]= (a>>1)*(2*vop_ref[0][1] + d[0][1]); - sprite_ref[1][0]= (a>>1)*(2*vop_ref[1][0] + d[0][0] + d[1][0]); - sprite_ref[1][1]= (a>>1)*(2*vop_ref[1][1] + d[0][1] + d[1][1]); - sprite_ref[2][0]= (a>>1)*(2*vop_ref[2][0] + d[0][0] + d[2][0]); - sprite_ref[2][1]= (a>>1)*(2*vop_ref[2][1] + d[0][1] + d[2][1]); - } -/* sprite_ref[3][0]= (a>>1)*(2*vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]); - sprite_ref[3][1]= (a>>1)*(2*vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */ - -// this is mostly identical to the mpeg4 std (and is totally unreadable because of that ...) -// perhaps it should be reordered to be more readable ... -// the idea behind this virtual_ref mess is to be able to use shifts later per pixel instead of divides -// so the distance between points is converted from w&h based to w2&h2 based which are of the 2^x form - virtual_ref[0][0]= 16*(vop_ref[0][0] + w2) - + ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + w2*(r*sprite_ref[1][0] - 16*vop_ref[1][0])),w); - virtual_ref[0][1]= 16*vop_ref[0][1] - + ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + w2*(r*sprite_ref[1][1] - 16*vop_ref[1][1])),w); - virtual_ref[1][0]= 16*vop_ref[0][0] - + ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + h2*(r*sprite_ref[2][0] - 16*vop_ref[2][0])),h); - virtual_ref[1][1]= 16*(vop_ref[0][1] + h2) - + ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + h2*(r*sprite_ref[2][1] - 16*vop_ref[2][1])),h); - - switch(s->num_sprite_warping_points) - { - case 0: - s->sprite_offset[0][0]= 0; - s->sprite_offset[0][1]= 0; - s->sprite_offset[1][0]= 0; - s->sprite_offset[1][1]= 0; - s->sprite_delta[0][0]= a; - s->sprite_delta[0][1]= 0; - s->sprite_delta[1][0]= 0; - s->sprite_delta[1][1]= a; - s->sprite_shift[0]= 0; - s->sprite_shift[1]= 0; - break; - case 1: //GMC only - s->sprite_offset[0][0]= sprite_ref[0][0] - a*vop_ref[0][0]; - s->sprite_offset[0][1]= sprite_ref[0][1] - a*vop_ref[0][1]; - s->sprite_offset[1][0]= ((sprite_ref[0][0]>>1)|(sprite_ref[0][0]&1)) - a*(vop_ref[0][0]/2); - s->sprite_offset[1][1]= ((sprite_ref[0][1]>>1)|(sprite_ref[0][1]&1)) - a*(vop_ref[0][1]/2); - s->sprite_delta[0][0]= a; - s->sprite_delta[0][1]= 0; - s->sprite_delta[1][0]= 0; - s->sprite_delta[1][1]= a; - s->sprite_shift[0]= 0; - s->sprite_shift[1]= 0; - break; - case 2: - s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+rho)) - + (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][0]) - + ( r*sprite_ref[0][1] - virtual_ref[0][1])*(-vop_ref[0][1]) - + (1<<(alpha+rho-1)); - s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+rho)) - + (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-vop_ref[0][0]) - + (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][1]) - + (1<<(alpha+rho-1)); - s->sprite_offset[1][0]= ( (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][0] + 1) - +( r*sprite_ref[0][1] - virtual_ref[0][1])*(-2*vop_ref[0][1] + 1) - +2*w2*r*sprite_ref[0][0] - - 16*w2 - + (1<<(alpha+rho+1))); - s->sprite_offset[1][1]= ( (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-2*vop_ref[0][0] + 1) - +(-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][1] + 1) - +2*w2*r*sprite_ref[0][1] - - 16*w2 - + (1<<(alpha+rho+1))); - s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0]); - s->sprite_delta[0][1]= (+r*sprite_ref[0][1] - virtual_ref[0][1]); - s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1]); - s->sprite_delta[1][1]= (-r*sprite_ref[0][0] + virtual_ref[0][0]); - - s->sprite_shift[0]= alpha+rho; - s->sprite_shift[1]= alpha+rho+2; - break; - case 3: - min_ab= FFMIN(alpha, beta); - w3= w2>>min_ab; - h3= h2>>min_ab; - s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+beta+rho-min_ab)) - + (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-vop_ref[0][0]) - + (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-vop_ref[0][1]) - + (1<<(alpha+beta+rho-min_ab-1)); - s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+beta+rho-min_ab)) - + (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-vop_ref[0][0]) - + (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-vop_ref[0][1]) - + (1<<(alpha+beta+rho-min_ab-1)); - s->sprite_offset[1][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-2*vop_ref[0][0] + 1) - + (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-2*vop_ref[0][1] + 1) - + 2*w2*h3*r*sprite_ref[0][0] - - 16*w2*h3 - + (1<<(alpha+beta+rho-min_ab+1)); - s->sprite_offset[1][1]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-2*vop_ref[0][0] + 1) - + (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-2*vop_ref[0][1] + 1) - + 2*w2*h3*r*sprite_ref[0][1] - - 16*w2*h3 - + (1<<(alpha+beta+rho-min_ab+1)); - s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3; - s->sprite_delta[0][1]= (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3; - s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3; - s->sprite_delta[1][1]= (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3; - - s->sprite_shift[0]= alpha + beta + rho - min_ab; - s->sprite_shift[1]= alpha + beta + rho - min_ab + 2; - break; - } - /* try to simplify the situation */ - if( s->sprite_delta[0][0] == a<<s->sprite_shift[0] - && s->sprite_delta[0][1] == 0 - && s->sprite_delta[1][0] == 0 - && s->sprite_delta[1][1] == a<<s->sprite_shift[0]) - { - s->sprite_offset[0][0]>>=s->sprite_shift[0]; - s->sprite_offset[0][1]>>=s->sprite_shift[0]; - s->sprite_offset[1][0]>>=s->sprite_shift[1]; - s->sprite_offset[1][1]>>=s->sprite_shift[1]; - s->sprite_delta[0][0]= a; - s->sprite_delta[0][1]= 0; - s->sprite_delta[1][0]= 0; - s->sprite_delta[1][1]= a; - s->sprite_shift[0]= 0; - s->sprite_shift[1]= 0; - s->real_sprite_warping_points=1; - } - else{ - int shift_y= 16 - s->sprite_shift[0]; - int shift_c= 16 - s->sprite_shift[1]; -//printf("shifts %d %d\n", shift_y, shift_c); - for(i=0; i<2; i++){ - s->sprite_offset[0][i]<<= shift_y; - s->sprite_offset[1][i]<<= shift_c; - s->sprite_delta[0][i]<<= shift_y; - s->sprite_delta[1][i]<<= shift_y; - s->sprite_shift[i]= 16; - } - s->real_sprite_warping_points= s->num_sprite_warping_points; - } -#if 0 -printf("vop:%d:%d %d:%d %d:%d, sprite:%d:%d %d:%d %d:%d, virtual: %d:%d %d:%d\n", - vop_ref[0][0], vop_ref[0][1], - vop_ref[1][0], vop_ref[1][1], - vop_ref[2][0], vop_ref[2][1], - sprite_ref[0][0], sprite_ref[0][1], - sprite_ref[1][0], sprite_ref[1][1], - sprite_ref[2][0], sprite_ref[2][1], - virtual_ref[0][0], virtual_ref[0][1], - virtual_ref[1][0], virtual_ref[1][1] - ); - -printf("offset: %d:%d , delta: %d %d %d %d, shift %d\n", - s->sprite_offset[0][0], s->sprite_offset[0][1], - s->sprite_delta[0][0], s->sprite_delta[0][1], - s->sprite_delta[1][0], s->sprite_delta[1][1], - s->sprite_shift[0] - ); -#endif -} - -static int mpeg4_decode_gop_header(MpegEncContext * s, GetBitContext *gb){ - int hours, minutes, seconds; - - hours= get_bits(gb, 5); - minutes= get_bits(gb, 6); - skip_bits1(gb); - seconds= get_bits(gb, 6); - - s->time_base= seconds + 60*(minutes + 60*hours); - - skip_bits1(gb); - skip_bits1(gb); - - return 0; -} - -static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){ - int width, height, vo_ver_id; - - /* vol header */ - skip_bits(gb, 1); /* random access */ - s->vo_type= get_bits(gb, 8); - if (get_bits1(gb) != 0) { /* is_ol_id */ - vo_ver_id = get_bits(gb, 4); /* vo_ver_id */ - skip_bits(gb, 3); /* vo_priority */ - } else { - vo_ver_id = 1; - } -//printf("vo type:%d\n",s->vo_type); - s->aspect_ratio_info= get_bits(gb, 4); - if(s->aspect_ratio_info == FF_ASPECT_EXTENDED){ - s->avctx->sample_aspect_ratio.num= get_bits(gb, 8); // par_width - s->avctx->sample_aspect_ratio.den= get_bits(gb, 8); // par_height - }else{ - s->avctx->sample_aspect_ratio= pixel_aspect[s->aspect_ratio_info]; - } - - if ((s->vol_control_parameters=get_bits1(gb))) { /* vol control parameter */ - int chroma_format= get_bits(gb, 2); - if(chroma_format!=1){ - av_log(s->avctx, AV_LOG_ERROR, "illegal chroma format\n"); - } - s->low_delay= get_bits1(gb); - if(get_bits1(gb)){ /* vbv parameters */ - get_bits(gb, 15); /* first_half_bitrate */ - skip_bits1(gb); /* marker */ - get_bits(gb, 15); /* latter_half_bitrate */ - skip_bits1(gb); /* marker */ - get_bits(gb, 15); /* first_half_vbv_buffer_size */ - skip_bits1(gb); /* marker */ - get_bits(gb, 3); /* latter_half_vbv_buffer_size */ - get_bits(gb, 11); /* first_half_vbv_occupancy */ - skip_bits1(gb); /* marker */ - get_bits(gb, 15); /* latter_half_vbv_occupancy */ - skip_bits1(gb); /* marker */ - } - }else{ - // set low delay flag only once the smartest? low delay detection won't be overriden - if(s->picture_number==0) - s->low_delay=0; - } - - s->shape = get_bits(gb, 2); /* vol shape */ - if(s->shape != RECT_SHAPE) av_log(s->avctx, AV_LOG_ERROR, "only rectangular vol supported\n"); - if(s->shape == GRAY_SHAPE && vo_ver_id != 1){ - av_log(s->avctx, AV_LOG_ERROR, "Gray shape not supported\n"); - skip_bits(gb, 4); //video_object_layer_shape_extension - } - - check_marker(gb, "before time_increment_resolution"); - - s->avctx->time_base.den = get_bits(gb, 16); - if(!s->avctx->time_base.den){ - av_log(s->avctx, AV_LOG_ERROR, "time_base.den==0\n"); - return -1; - } - - s->time_increment_bits = av_log2(s->avctx->time_base.den - 1) + 1; - if (s->time_increment_bits < 1) - s->time_increment_bits = 1; - - check_marker(gb, "before fixed_vop_rate"); - - if (get_bits1(gb) != 0) { /* fixed_vop_rate */ - s->avctx->time_base.num = get_bits(gb, s->time_increment_bits); - }else - s->avctx->time_base.num = 1; - - s->t_frame=0; - - if (s->shape != BIN_ONLY_SHAPE) { - if (s->shape == RECT_SHAPE) { - skip_bits1(gb); /* marker */ - width = get_bits(gb, 13); - skip_bits1(gb); /* marker */ - height = get_bits(gb, 13); - skip_bits1(gb); /* marker */ - if(width && height && !(s->width && s->codec_tag == ff_get_fourcc("MP4S"))){ /* they should be non zero but who knows ... */ - s->width = width; - s->height = height; -// printf("width/height: %d %d\n", width, height); - } - } - - s->progressive_sequence= - s->progressive_frame= get_bits1(gb)^1; - s->interlaced_dct=0; - if(!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO)) - av_log(s->avctx, AV_LOG_INFO, "MPEG4 OBMC not supported (very likely buggy encoder)\n"); /* OBMC Disable */ - if (vo_ver_id == 1) { - s->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */ - } else { - s->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */ - } - if(s->vol_sprite_usage==STATIC_SPRITE) av_log(s->avctx, AV_LOG_ERROR, "Static Sprites not supported\n"); - if(s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE){ - if(s->vol_sprite_usage==STATIC_SPRITE){ - s->sprite_width = get_bits(gb, 13); - skip_bits1(gb); /* marker */ - s->sprite_height= get_bits(gb, 13); - skip_bits1(gb); /* marker */ - s->sprite_left = get_bits(gb, 13); - skip_bits1(gb); /* marker */ - s->sprite_top = get_bits(gb, 13); - skip_bits1(gb); /* marker */ - } - s->num_sprite_warping_points= get_bits(gb, 6); - s->sprite_warping_accuracy = get_bits(gb, 2); - s->sprite_brightness_change= get_bits1(gb); - if(s->vol_sprite_usage==STATIC_SPRITE) - s->low_latency_sprite= get_bits1(gb); - } - // FIXME sadct disable bit if verid!=1 && shape not rect - - if (get_bits1(gb) == 1) { /* not_8_bit */ - s->quant_precision = get_bits(gb, 4); /* quant_precision */ - if(get_bits(gb, 4)!=8) av_log(s->avctx, AV_LOG_ERROR, "N-bit not supported\n"); /* bits_per_pixel */ - if(s->quant_precision!=5) av_log(s->avctx, AV_LOG_ERROR, "quant precision %d\n", s->quant_precision); - } else { - s->quant_precision = 5; - } - - // FIXME a bunch of grayscale shape things - - if((s->mpeg_quant=get_bits1(gb))){ /* vol_quant_type */ - int i, v; - - /* load default matrixes */ - for(i=0; i<64; i++){ - int j= s->dsp.idct_permutation[i]; - v= ff_mpeg4_default_intra_matrix[i]; - s->intra_matrix[j]= v; - s->chroma_intra_matrix[j]= v; - - v= ff_mpeg4_default_non_intra_matrix[i]; - s->inter_matrix[j]= v; - s->chroma_inter_matrix[j]= v; - } - - /* load custom intra matrix */ - if(get_bits1(gb)){ - int last=0; - for(i=0; i<64; i++){ - int j; - v= get_bits(gb, 8); - if(v==0) break; - - last= v; - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->intra_matrix[j]= v; - s->chroma_intra_matrix[j]= v; - } - - /* replicate last value */ - for(; i<64; i++){ - int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->intra_matrix[j]= last; - s->chroma_intra_matrix[j]= last; - } - } - - /* load custom non intra matrix */ - if(get_bits1(gb)){ - int last=0; - for(i=0; i<64; i++){ - int j; - v= get_bits(gb, 8); - if(v==0) break; - - last= v; - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->inter_matrix[j]= v; - s->chroma_inter_matrix[j]= v; - } - - /* replicate last value */ - for(; i<64; i++){ - int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->inter_matrix[j]= last; - s->chroma_inter_matrix[j]= last; - } - } - - // FIXME a bunch of grayscale shape things - } - - if(vo_ver_id != 1) - s->quarter_sample= get_bits1(gb); - else s->quarter_sample=0; - - if(!get_bits1(gb)) av_log(s->avctx, AV_LOG_ERROR, "Complexity estimation not supported\n"); - - s->resync_marker= !get_bits1(gb); /* resync_marker_disabled */ - - s->data_partitioning= get_bits1(gb); - if(s->data_partitioning){ - s->rvlc= get_bits1(gb); - } - - if(vo_ver_id != 1) { - s->new_pred= get_bits1(gb); - if(s->new_pred){ - av_log(s->avctx, AV_LOG_ERROR, "new pred not supported\n"); - skip_bits(gb, 2); /* requested upstream message type */ - skip_bits1(gb); /* newpred segment type */ - } - s->reduced_res_vop= get_bits1(gb); - if(s->reduced_res_vop) av_log(s->avctx, AV_LOG_ERROR, "reduced resolution VOP not supported\n"); - } - else{ - s->new_pred=0; - s->reduced_res_vop= 0; - } - - s->scalability= get_bits1(gb); - - if (s->scalability) { - GetBitContext bak= *gb; - int ref_layer_id; - int ref_layer_sampling_dir; - int h_sampling_factor_n; - int h_sampling_factor_m; - int v_sampling_factor_n; - int v_sampling_factor_m; - - s->hierachy_type= get_bits1(gb); - ref_layer_id= get_bits(gb, 4); - ref_layer_sampling_dir= get_bits1(gb); - h_sampling_factor_n= get_bits(gb, 5); - h_sampling_factor_m= get_bits(gb, 5); - v_sampling_factor_n= get_bits(gb, 5); - v_sampling_factor_m= get_bits(gb, 5); - s->enhancement_type= get_bits1(gb); - - if( h_sampling_factor_n==0 || h_sampling_factor_m==0 - || v_sampling_factor_n==0 || v_sampling_factor_m==0){ - -// fprintf(stderr, "illegal scalability header (VERY broken encoder), trying to workaround\n"); - s->scalability=0; - - *gb= bak; - }else - av_log(s->avctx, AV_LOG_ERROR, "scalability not supported\n"); - - // bin shape stuff FIXME - } - } - return 0; -} - -/** - * decodes the user data stuff in the header. - * allso inits divx/xvid/lavc_version/build - */ -static int decode_user_data(MpegEncContext *s, GetBitContext *gb){ - char buf[256]; - int i; - int e; - int ver = 0, build = 0, ver2 = 0, ver3 = 0; - char last; - - for(i=0; i<255 && get_bits_count(gb) < gb->size_in_bits; i++){ - if(show_bits(gb, 23) == 0) break; - buf[i]= get_bits(gb, 8); - } - buf[i]=0; - - /* divx detection */ - e=sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last); - if(e<2) - e=sscanf(buf, "DivX%db%d%c", &ver, &build, &last); - if(e>=2){ - s->divx_version= ver; - s->divx_build= build; - s->divx_packed= e==3 && last=='p'; - } - - /* ffmpeg detection */ - e=sscanf(buf, "FFmpe%*[^b]b%d", &build)+3; - if(e!=4) - e=sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build); - if(e!=4){ - e=sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3)+1; - if (e>1) - build= (ver<<16) + (ver2<<8) + ver3; - } - if(e!=4){ - if(strcmp(buf, "ffmpeg")==0){ - s->lavc_build= 4600; - } - } - if(e==4){ - s->lavc_build= build; - } - - /* xvid detection */ - e=sscanf(buf, "XviD%d", &build); - if(e==1){ - s->xvid_build= build; - } - -//printf("User Data: %s\n", buf); - return 0; -} - -static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){ - int time_incr, time_increment; - - s->pict_type = get_bits(gb, 2) + I_TYPE; /* pict type: I = 0 , P = 1 */ - if(s->pict_type==B_TYPE && s->low_delay && s->vol_control_parameters==0 && !(s->flags & CODEC_FLAG_LOW_DELAY)){ - av_log(s->avctx, AV_LOG_ERROR, "low_delay flag incorrectly, clearing it\n"); - s->low_delay=0; - } - - s->partitioned_frame= s->data_partitioning && s->pict_type!=B_TYPE; - if(s->partitioned_frame) - s->decode_mb= mpeg4_decode_partitioned_mb; - else - s->decode_mb= ff_mpeg4_decode_mb; - - time_incr=0; - while (get_bits1(gb) != 0) - time_incr++; - - check_marker(gb, "before time_increment"); - - if(s->time_increment_bits==0 || !(show_bits(gb, s->time_increment_bits+1)&1)){ - av_log(s->avctx, AV_LOG_ERROR, "hmm, seems the headers are not complete, trying to guess time_increment_bits\n"); - - for(s->time_increment_bits=1 ;s->time_increment_bits<16; s->time_increment_bits++){ - if(show_bits(gb, s->time_increment_bits+1)&1) break; - } - - av_log(s->avctx, AV_LOG_ERROR, "my guess is %d bits ;)\n",s->time_increment_bits); - } - - if(IS_3IV1) time_increment= get_bits1(gb); //FIXME investigate further - else time_increment= get_bits(gb, s->time_increment_bits); - -// printf("%d %X\n", s->time_increment_bits, time_increment); -//av_log(s->avctx, AV_LOG_DEBUG, " type:%d modulo_time_base:%d increment:%d t_frame %d\n", s->pict_type, time_incr, time_increment, s->t_frame); - if(s->pict_type!=B_TYPE){ - s->last_time_base= s->time_base; - s->time_base+= time_incr; - s->time= s->time_base*s->avctx->time_base.den + time_increment; - if(s->workaround_bugs&FF_BUG_UMP4){ - if(s->time < s->last_non_b_time){ -// fprintf(stderr, "header is not mpeg4 compatible, broken encoder, trying to workaround\n"); - s->time_base++; - s->time+= s->avctx->time_base.den; - } - } - s->pp_time= s->time - s->last_non_b_time; - s->last_non_b_time= s->time; - }else{ - s->time= (s->last_time_base + time_incr)*s->avctx->time_base.den + time_increment; - s->pb_time= s->pp_time - (s->last_non_b_time - s->time); - if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){ -// printf("messed up order, maybe after seeking? skipping current b frame\n"); - return FRAME_SKIPPED; - } - ff_mpeg4_init_direct_mv(s); - - if(s->t_frame==0) s->t_frame= s->pb_time; - if(s->t_frame==0) s->t_frame=1; // 1/0 protection - s->pp_field_time= ( ROUNDED_DIV(s->last_non_b_time, s->t_frame) - - ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2; - s->pb_field_time= ( ROUNDED_DIV(s->time, s->t_frame) - - ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2; - if(!s->progressive_sequence){ - if(s->pp_field_time <= s->pb_field_time || s->pb_field_time <= 1) - return FRAME_SKIPPED; - } - } -//av_log(s->avctx, AV_LOG_DEBUG, "last nonb %"PRId64" last_base %d time %"PRId64" pp %d pb %d t %d ppf %d pbf %d\n", s->last_non_b_time, s->last_time_base, s->time, s->pp_time, s->pb_time, s->t_frame, s->pp_field_time, s->pb_field_time); - - if(s->avctx->time_base.num) - s->current_picture_ptr->pts= (s->time + s->avctx->time_base.num/2) / s->avctx->time_base.num; - else - s->current_picture_ptr->pts= AV_NOPTS_VALUE; - if(s->avctx->debug&FF_DEBUG_PTS) - av_log(s->avctx, AV_LOG_DEBUG, "MPEG4 PTS: %"PRId64"\n", s->current_picture_ptr->pts); - - check_marker(gb, "before vop_coded"); - - /* vop coded */ - if (get_bits1(gb) != 1){ - if(s->avctx->debug&FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_ERROR, "vop not coded\n"); - return FRAME_SKIPPED; - } -//printf("time %d %d %d || %"PRId64" %"PRId64" %"PRId64"\n", s->time_increment_bits, s->avctx->time_base.den, s->time_base, -//s->time, s->last_non_b_time, s->last_non_b_time - s->pp_time); - if (s->shape != BIN_ONLY_SHAPE && ( s->pict_type == P_TYPE - || (s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE))) { - /* rounding type for motion estimation */ - s->no_rounding = get_bits1(gb); - } else { - s->no_rounding = 0; - } -//FIXME reduced res stuff - - if (s->shape != RECT_SHAPE) { - if (s->vol_sprite_usage != 1 || s->pict_type != I_TYPE) { - int width, height, hor_spat_ref, ver_spat_ref; - - width = get_bits(gb, 13); - skip_bits1(gb); /* marker */ - height = get_bits(gb, 13); - skip_bits1(gb); /* marker */ - hor_spat_ref = get_bits(gb, 13); /* hor_spat_ref */ - skip_bits1(gb); /* marker */ - ver_spat_ref = get_bits(gb, 13); /* ver_spat_ref */ - } - skip_bits1(gb); /* change_CR_disable */ - - if (get_bits1(gb) != 0) { - skip_bits(gb, 8); /* constant_alpha_value */ - } - } -//FIXME complexity estimation stuff - - if (s->shape != BIN_ONLY_SHAPE) { - s->intra_dc_threshold= mpeg4_dc_threshold[ get_bits(gb, 3) ]; - if(!s->progressive_sequence){ - s->top_field_first= get_bits1(gb); - s->alternate_scan= get_bits1(gb); - }else - s->alternate_scan= 0; - } - - if(s->alternate_scan){ - ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); - } else{ - ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan); - ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); - } - - if(s->pict_type == S_TYPE && (s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE)){ - mpeg4_decode_sprite_trajectory(s, gb); - if(s->sprite_brightness_change) av_log(s->avctx, AV_LOG_ERROR, "sprite_brightness_change not supported\n"); - if(s->vol_sprite_usage==STATIC_SPRITE) av_log(s->avctx, AV_LOG_ERROR, "static sprite not supported\n"); - } - - if (s->shape != BIN_ONLY_SHAPE) { - s->chroma_qscale= s->qscale = get_bits(gb, s->quant_precision); - if(s->qscale==0){ - av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (qscale=0)\n"); - return -1; // makes no sense to continue, as there is nothing left from the image then - } - - if (s->pict_type != I_TYPE) { - s->f_code = get_bits(gb, 3); /* fcode_for */ - if(s->f_code==0){ - av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (f_code=0)\n"); - return -1; // makes no sense to continue, as the MV decoding will break very quickly - } - }else - s->f_code=1; - - if (s->pict_type == B_TYPE) { - s->b_code = get_bits(gb, 3); - }else - s->b_code=1; - - if(s->avctx->debug&FF_DEBUG_PICT_INFO){ - av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%d,%d %s size:%d pro:%d alt:%d top:%d %spel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s dc:%d\n", - s->qscale, s->f_code, s->b_code, - s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")), - gb->size_in_bits,s->progressive_sequence, s->alternate_scan, s->top_field_first, - s->quarter_sample ? "q" : "h", s->data_partitioning, s->resync_marker, s->num_sprite_warping_points, - s->sprite_warping_accuracy, 1-s->no_rounding, s->vo_type, s->vol_control_parameters ? " VOLC" : " ", s->intra_dc_threshold); - } - - if(!s->scalability){ - if (s->shape!=RECT_SHAPE && s->pict_type!=I_TYPE) { - skip_bits1(gb); // vop shape coding type - } - }else{ - if(s->enhancement_type){ - int load_backward_shape= get_bits1(gb); - if(load_backward_shape){ - av_log(s->avctx, AV_LOG_ERROR, "load backward shape isn't supported\n"); - } - } - skip_bits(gb, 2); //ref_select_code - } - } - /* detect buggy encoders which don't set the low_delay flag (divx4/xvid/opendivx)*/ - // note we cannot detect divx5 without b-frames easily (although it's buggy too) - if(s->vo_type==0 && s->vol_control_parameters==0 && s->divx_version==0 && s->picture_number==0){ - av_log(s->avctx, AV_LOG_ERROR, "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n"); - s->low_delay=1; - } - - s->picture_number++; // better than pic number==0 always ;) - - s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; //FIXME add short header support - s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table; - - if(s->workaround_bugs&FF_BUG_EDGE){ - s->h_edge_pos= s->width; - s->v_edge_pos= s->height; - } - return 0; -} - -/** - * decode mpeg4 headers - * @return <0 if no VOP found (or a damaged one) - * FRAME_SKIPPED if a not coded VOP is found - * 0 if a VOP is found - */ -int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb) -{ - int startcode, v; - - /* search next start code */ - align_get_bits(gb); - - if(s->codec_tag == ff_get_fourcc("WV1F") && show_bits(gb, 24) == 0x575630){ - skip_bits(gb, 24); - if(get_bits(gb, 8) == 0xF0) - return decode_vop_header(s, gb); - } - - startcode = 0xff; - for(;;) { - if(get_bits_count(gb) >= gb->size_in_bits){ - if(gb->size_in_bits==8 && (s->divx_version || s->xvid_build)){ - av_log(s->avctx, AV_LOG_ERROR, "frame skip %d\n", gb->size_in_bits); - return FRAME_SKIPPED; //divx bug - }else - return -1; //end of stream - } - - /* use the bits after the test */ - v = get_bits(gb, 8); - startcode = ((startcode << 8) | v) & 0xffffffff; - - if((startcode&0xFFFFFF00) != 0x100) - continue; //no startcode - - if(s->avctx->debug&FF_DEBUG_STARTCODE){ - av_log(s->avctx, AV_LOG_DEBUG, "startcode: %3X ", startcode); - if (startcode<=0x11F) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Start"); - else if(startcode<=0x12F) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Layer Start"); - else if(startcode<=0x13F) av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); - else if(startcode<=0x15F) av_log(s->avctx, AV_LOG_DEBUG, "FGS bp start"); - else if(startcode<=0x1AF) av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); - else if(startcode==0x1B0) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq Start"); - else if(startcode==0x1B1) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq End"); - else if(startcode==0x1B2) av_log(s->avctx, AV_LOG_DEBUG, "User Data"); - else if(startcode==0x1B3) av_log(s->avctx, AV_LOG_DEBUG, "Group of VOP start"); - else if(startcode==0x1B4) av_log(s->avctx, AV_LOG_DEBUG, "Video Session Error"); - else if(startcode==0x1B5) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Start"); - else if(startcode==0x1B6) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Plane start"); - else if(startcode==0x1B7) av_log(s->avctx, AV_LOG_DEBUG, "slice start"); - else if(startcode==0x1B8) av_log(s->avctx, AV_LOG_DEBUG, "extension start"); - else if(startcode==0x1B9) av_log(s->avctx, AV_LOG_DEBUG, "fgs start"); - else if(startcode==0x1BA) av_log(s->avctx, AV_LOG_DEBUG, "FBA Object start"); - else if(startcode==0x1BB) av_log(s->avctx, AV_LOG_DEBUG, "FBA Object Plane start"); - else if(startcode==0x1BC) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object start"); - else if(startcode==0x1BD) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object Plane start"); - else if(startcode==0x1BE) av_log(s->avctx, AV_LOG_DEBUG, "Still Texture Object start"); - else if(startcode==0x1BF) av_log(s->avctx, AV_LOG_DEBUG, "Texture Spatial Layer start"); - else if(startcode==0x1C0) av_log(s->avctx, AV_LOG_DEBUG, "Texture SNR Layer start"); - else if(startcode==0x1C1) av_log(s->avctx, AV_LOG_DEBUG, "Texture Tile start"); - else if(startcode==0x1C2) av_log(s->avctx, AV_LOG_DEBUG, "Texture Shape Layer start"); - else if(startcode==0x1C3) av_log(s->avctx, AV_LOG_DEBUG, "stuffing start"); - else if(startcode<=0x1C5) av_log(s->avctx, AV_LOG_DEBUG, "reserved"); - else if(startcode<=0x1FF) av_log(s->avctx, AV_LOG_DEBUG, "System start"); - av_log(s->avctx, AV_LOG_DEBUG, " at %d\n", get_bits_count(gb)); - } - - if(startcode >= 0x120 && startcode <= 0x12F){ - if(decode_vol_header(s, gb) < 0) - return -1; - } - else if(startcode == USER_DATA_STARTCODE){ - decode_user_data(s, gb); - } - else if(startcode == GOP_STARTCODE){ - mpeg4_decode_gop_header(s, gb); - } - else if(startcode == VOP_STARTCODE){ - return decode_vop_header(s, gb); - } - - align_get_bits(gb); - startcode = 0xff; - } -} - -/* don't understand why they choose a different header ! */ -int intel_h263_decode_picture_header(MpegEncContext *s) -{ - int format; - - /* picture header */ - if (get_bits_long(&s->gb, 22) != 0x20) { - av_log(s->avctx, AV_LOG_ERROR, "Bad picture start code\n"); - return -1; - } - s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */ - - if (get_bits1(&s->gb) != 1) { - av_log(s->avctx, AV_LOG_ERROR, "Bad marker\n"); - return -1; /* marker */ - } - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "Bad H263 id\n"); - return -1; /* h263 id */ - } - skip_bits1(&s->gb); /* split screen off */ - skip_bits1(&s->gb); /* camera off */ - skip_bits1(&s->gb); /* freeze picture release off */ - - format = get_bits(&s->gb, 3); - if (format != 7) { - av_log(s->avctx, AV_LOG_ERROR, "Intel H263 free format not supported\n"); - return -1; - } - s->h263_plus = 0; - - s->pict_type = I_TYPE + get_bits1(&s->gb); - - s->unrestricted_mv = get_bits1(&s->gb); - s->h263_long_vectors = s->unrestricted_mv; - - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "SAC not supported\n"); - return -1; /* SAC: off */ - } - if (get_bits1(&s->gb) != 0) { - s->obmc= 1; - av_log(s->avctx, AV_LOG_ERROR, "Advanced Prediction Mode not supported\n"); -// return -1; /* advanced prediction mode: off */ - } - if (get_bits1(&s->gb) != 0) { - av_log(s->avctx, AV_LOG_ERROR, "PB frame mode no supported\n"); - return -1; /* PB frame mode */ - } - - /* skip unknown header garbage */ - skip_bits(&s->gb, 41); - - s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); - skip_bits1(&s->gb); /* Continuous Presence Multipoint mode: off */ - - /* PEI */ - while (get_bits1(&s->gb) != 0) { - skip_bits(&s->gb, 8); - } - s->f_code = 1; - - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; - - return 0; -} - -int flv_h263_decode_picture_header(MpegEncContext *s) -{ - int format, width, height; - - /* picture header */ - if (get_bits_long(&s->gb, 17) != 1) { - av_log(s->avctx, AV_LOG_ERROR, "Bad picture start code\n"); - return -1; - } - format = get_bits(&s->gb, 5); - if (format != 0 && format != 1) { - av_log(s->avctx, AV_LOG_ERROR, "Bad picture format\n"); - return -1; - } - s->h263_flv = format+1; - s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */ - format = get_bits(&s->gb, 3); - switch (format) { - case 0: - width = get_bits(&s->gb, 8); - height = get_bits(&s->gb, 8); - break; - case 1: - width = get_bits(&s->gb, 16); - height = get_bits(&s->gb, 16); - break; - case 2: - width = 352; - height = 288; - break; - case 3: - width = 176; - height = 144; - break; - case 4: - width = 128; - height = 96; - break; - case 5: - width = 320; - height = 240; - break; - case 6: - width = 160; - height = 120; - break; - default: - width = height = 0; - break; - } - if(avcodec_check_dimensions(s->avctx, width, height)) - return -1; - s->width = width; - s->height = height; - - s->pict_type = I_TYPE + get_bits(&s->gb, 2); - s->dropable= s->pict_type > P_TYPE; - if (s->dropable) - s->pict_type = P_TYPE; - - skip_bits1(&s->gb); /* deblocking flag */ - s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); - - s->h263_plus = 0; - - s->unrestricted_mv = 1; - s->h263_long_vectors = 0; - - /* PEI */ - while (get_bits1(&s->gb) != 0) { - skip_bits(&s->gb, 8); - } - s->f_code = 1; - - if(s->avctx->debug & FF_DEBUG_PICT_INFO){ - av_log(s->avctx, AV_LOG_DEBUG, "%c esc_type:%d, qp:%d num:%d\n", - s->dropable ? 'D' : av_get_pict_type_char(s->pict_type), s->h263_flv-1, s->qscale, s->picture_number); - } - - s->y_dc_scale_table= - s->c_dc_scale_table= ff_mpeg1_dc_scale_table; - - return 0; -} |