diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/mpeg12.c')
| -rw-r--r-- | src/libffmpeg/libavcodec/mpeg12.c | 3504 |
1 files changed, 0 insertions, 3504 deletions
diff --git a/src/libffmpeg/libavcodec/mpeg12.c b/src/libffmpeg/libavcodec/mpeg12.c deleted file mode 100644 index 63fb00feb..000000000 --- a/src/libffmpeg/libavcodec/mpeg12.c +++ /dev/null @@ -1,3504 +0,0 @@ -/* - * MPEG1 codec / MPEG2 decoder - * Copyright (c) 2000,2001 Fabrice Bellard. - * 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 - */ - -/** - * @file mpeg12.c - * MPEG1/2 codec - */ - -//#define DEBUG -#include "avcodec.h" -#include "dsputil.h" -#include "mpegvideo.h" - -#include "mpeg12data.h" - -//#undef NDEBUG -//#include <assert.h> - - -/* if xine's MPEG encoder is enabled, enable the encoding features in - * this particular module */ -#if defined(XINE_MPEG_ENCODER) && !defined(CONFIG_ENCODERS) -#define CONFIG_ENCODERS -#endif - - -/* Start codes. */ -#define SEQ_END_CODE 0x000001b7 -#define SEQ_START_CODE 0x000001b3 -#define GOP_START_CODE 0x000001b8 -#define PICTURE_START_CODE 0x00000100 -#define SLICE_MIN_START_CODE 0x00000101 -#define SLICE_MAX_START_CODE 0x000001af -#define EXT_START_CODE 0x000001b5 -#define USER_START_CODE 0x000001b2 - -#define DC_VLC_BITS 9 -#define MV_VLC_BITS 9 -#define MBINCR_VLC_BITS 9 -#define MB_PAT_VLC_BITS 9 -#define MB_PTYPE_VLC_BITS 6 -#define MB_BTYPE_VLC_BITS 6 -#define TEX_VLC_BITS 9 - -#ifdef CONFIG_ENCODERS -static void mpeg1_encode_block(MpegEncContext *s, - DCTELEM *block, - int component); -static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added -#endif //CONFIG_ENCODERS -static inline int mpeg1_decode_block_inter(MpegEncContext *s, - DCTELEM *block, - int n); -static inline int mpeg1_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n); -static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n); -static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, - DCTELEM *block, - int n); -static inline int mpeg2_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n); -static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, DCTELEM *block, int n); -static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, DCTELEM *block, int n); -static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred); -static void exchange_uv(MpegEncContext *s); - -#ifdef HAVE_XVMC -extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx); -extern int XVMC_field_end(MpegEncContext *s); -extern void XVMC_pack_pblocks(MpegEncContext *s,int cbp); -extern void XVMC_init_block(MpegEncContext *s);//set s->block -#endif - -static const enum PixelFormat pixfmt_yuv_420[]= {PIX_FMT_YUV420P,-1}; -static const enum PixelFormat pixfmt_yuv_422[]= {PIX_FMT_YUV422P,-1}; -static const enum PixelFormat pixfmt_yuv_444[]= {PIX_FMT_YUV444P,-1}; -static const enum PixelFormat pixfmt_xvmc_mpg2_420[] = { - PIX_FMT_XVMC_MPEG2_IDCT, - PIX_FMT_XVMC_MPEG2_MC, - -1}; -#ifdef CONFIG_ENCODERS -static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL; -static uint8_t fcode_tab[MAX_MV*2+1]; - -static uint8_t uni_mpeg1_ac_vlc_len [64*64*2]; -static uint8_t uni_mpeg2_ac_vlc_len [64*64*2]; - -/* simple include everything table for dc, first byte is bits number next 3 are code*/ -static uint32_t mpeg1_lum_dc_uni[512]; -static uint32_t mpeg1_chr_dc_uni[512]; - -static uint8_t mpeg1_index_run[2][64]; -static int8_t mpeg1_max_level[2][64]; -#endif //CONFIG_ENCODERS - -static void init_2d_vlc_rl(RLTable *rl, int use_static) -{ - int i; - - init_vlc(&rl->vlc, TEX_VLC_BITS, rl->n + 2, - &rl->table_vlc[0][1], 4, 2, - &rl->table_vlc[0][0], 4, 2, use_static); - - if(use_static) - rl->rl_vlc[0]= av_mallocz_static(rl->vlc.table_size*sizeof(RL_VLC_ELEM)); - else - rl->rl_vlc[0]= 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= 65; - level= MAX_LEVEL; - }else if(len<0){ //more bits needed - run= 0; - level= code; - }else{ - if(code==rl->n){ //esc - run= 65; - level= 0; - }else if(code==rl->n+1){ //eob - run= 0; - level= 127; - }else{ - run= rl->table_run [code] + 1; - level= rl->table_level[code]; - } - } - rl->rl_vlc[0][i].len= len; - rl->rl_vlc[0][i].level= level; - rl->rl_vlc[0][i].run= run; - } -} - -#ifdef CONFIG_ENCODERS -static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){ - int i; - - for(i=0; i<128; i++){ - int level= i-64; - int run; - for(run=0; run<64; run++){ - int len, bits, code; - - int alevel= FFABS(level); - int sign= (level>>31)&1; - - if (alevel > rl->max_level[0][run]) - code= 111; /*rl->n*/ - else - code= rl->index_run[0][run] + alevel - 1; - - if (code < 111 /* rl->n */) { - /* store the vlc & sign at once */ - len= rl->table_vlc[code][1]+1; - bits= (rl->table_vlc[code][0]<<1) + sign; - } else { - len= rl->table_vlc[111/*rl->n*/][1]+6; - bits= rl->table_vlc[111/*rl->n*/][0]<<6; - - bits|= run; - if (alevel < 128) { - bits<<=8; len+=8; - bits|= level & 0xff; - } else { - bits<<=16; len+=16; - bits|= level & 0xff; - if (level < 0) { - bits|= 0x8001 + level + 255; - } else { - bits|= level & 0xffff; - } - } - } - - uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len; - } - } -} - - -static int find_frame_rate_index(MpegEncContext *s){ - int i; - int64_t dmin= INT64_MAX; - int64_t d; - - for(i=1;i<14;i++) { - int64_t n0= 1001LL/ff_frame_rate_tab[i].den*ff_frame_rate_tab[i].num*s->avctx->time_base.num; - int64_t n1= 1001LL*s->avctx->time_base.den; - if(s->avctx->strict_std_compliance > FF_COMPLIANCE_INOFFICIAL && i>=9) break; - - d = FFABS(n0 - n1); - if(d < dmin){ - dmin=d; - s->frame_rate_index= i; - } - } - if(dmin) - return -1; - else - return 0; -} - -static int encode_init(AVCodecContext *avctx) -{ - MpegEncContext *s = avctx->priv_data; - - if(MPV_encode_init(avctx) < 0) - return -1; - - if(find_frame_rate_index(s) < 0){ - if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){ - av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num); - return -1; - }else{ - av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num); - } - } - - if(avctx->profile == FF_PROFILE_UNKNOWN) - avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; - - if(avctx->level == FF_LEVEL_UNKNOWN) - avctx->level = s->chroma_format == CHROMA_420 ? 8 : 5; - - if((avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) && s->frame_rate_index != 4){ - av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n"); - return -1; - } - - return 0; -} - -static void put_header(MpegEncContext *s, int header) -{ - align_put_bits(&s->pb); - put_bits(&s->pb, 16, header>>16); - put_bits(&s->pb, 16, header&0xFFFF); -} - -/* put sequence header if needed */ -static void mpeg1_encode_sequence_header(MpegEncContext *s) -{ - unsigned int vbv_buffer_size; - unsigned int fps, v; - int i; - uint64_t time_code; - float best_aspect_error= 1E10; - float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio); - int constraint_parameter_flag; - - if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA) - - if (s->current_picture.key_frame) { - AVRational framerate= ff_frame_rate_tab[s->frame_rate_index]; - - /* mpeg1 header repeated every gop */ - put_header(s, SEQ_START_CODE); - - put_bits(&s->pb, 12, s->width); - put_bits(&s->pb, 12, s->height); - - for(i=1; i<15; i++){ - float error= aspect_ratio; - if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1) - error-= 1.0/mpeg1_aspect[i]; - else - error-= av_q2d(mpeg2_aspect[i])*s->height/s->width; - - error= FFABS(error); - - if(error < best_aspect_error){ - best_aspect_error= error; - s->aspect_ratio_info= i; - } - } - - put_bits(&s->pb, 4, s->aspect_ratio_info); - put_bits(&s->pb, 4, s->frame_rate_index); - - if(s->avctx->rc_max_rate){ - v = (s->avctx->rc_max_rate + 399) / 400; - if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO) - v = 0x3ffff; - }else{ - v= 0x3FFFF; - } - - if(s->avctx->rc_buffer_size) - vbv_buffer_size = s->avctx->rc_buffer_size; - else - /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */ - vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024; - vbv_buffer_size= (vbv_buffer_size + 16383) / 16384; - - put_bits(&s->pb, 18, v & 0x3FFFF); - put_bits(&s->pb, 1, 1); /* marker */ - put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF); - - constraint_parameter_flag= - s->width <= 768 && s->height <= 576 && - s->mb_width * s->mb_height <= 396 && - s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 && - framerate.num <= framerate.den*30 && - s->avctx->me_range && s->avctx->me_range < 128 && - vbv_buffer_size <= 20 && - v <= 1856000/400 && - s->codec_id == CODEC_ID_MPEG1VIDEO; - - put_bits(&s->pb, 1, constraint_parameter_flag); - - ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); - ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); - - if(s->codec_id == CODEC_ID_MPEG2VIDEO){ - put_header(s, EXT_START_CODE); - put_bits(&s->pb, 4, 1); //seq ext - - put_bits(&s->pb, 1, s->chroma_format == CHROMA_422); //escx - - put_bits(&s->pb, 3, s->avctx->profile); //profile - put_bits(&s->pb, 4, s->avctx->level); //level - - put_bits(&s->pb, 1, s->progressive_sequence); - put_bits(&s->pb, 2, s->chroma_format); - put_bits(&s->pb, 2, 0); //horizontal size ext - put_bits(&s->pb, 2, 0); //vertical size ext - put_bits(&s->pb, 12, v>>18); //bitrate ext - put_bits(&s->pb, 1, 1); //marker - put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext - put_bits(&s->pb, 1, s->low_delay); - put_bits(&s->pb, 2, 0); // frame_rate_ext_n - put_bits(&s->pb, 5, 0); // frame_rate_ext_d - } - - put_header(s, GOP_START_CODE); - put_bits(&s->pb, 1, !!(s->avctx->flags & CODEC_FLAG2_DROP_FRAME_TIMECODE)); /* drop frame flag */ - /* time code : we must convert from the real frame rate to a - fake mpeg frame rate in case of low frame rate */ - fps = (framerate.num + framerate.den/2)/ framerate.den; - time_code = s->current_picture_ptr->coded_picture_number + s->avctx->timecode_frame_start; - - s->gop_picture_number = s->current_picture_ptr->coded_picture_number; - if (s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) { - /* only works for NTSC 29.97 */ - int d = time_code / 17982; - int m = time_code % 17982; - //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */ - time_code += 18 * d + 2 * ((m - 2) / 1798); - } - put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24)); - put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60)); - put_bits(&s->pb, 1, 1); - put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60)); - put_bits(&s->pb, 6, (uint32_t)((time_code % fps))); - put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP)); - put_bits(&s->pb, 1, 0); /* broken link */ - } -} - -static inline void encode_mb_skip_run(MpegEncContext *s, int run){ - while (run >= 33) { - put_bits(&s->pb, 11, 0x008); - run -= 33; - } - put_bits(&s->pb, mbAddrIncrTable[run][1], - mbAddrIncrTable[run][0]); -} -#endif //CONFIG_ENCODERS - -static void common_init(MpegEncContext *s) -{ - - s->y_dc_scale_table= - s->c_dc_scale_table= mpeg2_dc_scale_table[s->intra_dc_precision]; - -} - -void ff_mpeg1_clean_buffers(MpegEncContext *s){ - s->last_dc[0] = 1 << (7 + s->intra_dc_precision); - s->last_dc[1] = s->last_dc[0]; - s->last_dc[2] = s->last_dc[0]; - memset(s->last_mv, 0, sizeof(s->last_mv)); -} - -#ifdef CONFIG_ENCODERS - -void ff_mpeg1_encode_slice_header(MpegEncContext *s){ - put_header(s, SLICE_MIN_START_CODE + s->mb_y); - put_bits(&s->pb, 5, s->qscale); /* quantizer scale */ - put_bits(&s->pb, 1, 0); /* slice extra information */ -} - -void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number) -{ - mpeg1_encode_sequence_header(s); - - /* mpeg1 picture header */ - put_header(s, PICTURE_START_CODE); - /* temporal reference */ - - // RAL: s->picture_number instead of s->fake_picture_number - put_bits(&s->pb, 10, (s->picture_number - - s->gop_picture_number) & 0x3ff); - put_bits(&s->pb, 3, s->pict_type); - - s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8; - put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */ - - // RAL: Forward f_code also needed for B frames - if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) { - put_bits(&s->pb, 1, 0); /* half pel coordinates */ - if(s->codec_id == CODEC_ID_MPEG1VIDEO) - put_bits(&s->pb, 3, s->f_code); /* forward_f_code */ - else - put_bits(&s->pb, 3, 7); /* forward_f_code */ - } - - // RAL: Backward f_code necessary for B frames - if (s->pict_type == B_TYPE) { - put_bits(&s->pb, 1, 0); /* half pel coordinates */ - if(s->codec_id == CODEC_ID_MPEG1VIDEO) - put_bits(&s->pb, 3, s->b_code); /* backward_f_code */ - else - put_bits(&s->pb, 3, 7); /* backward_f_code */ - } - - put_bits(&s->pb, 1, 0); /* extra bit picture */ - - s->frame_pred_frame_dct = 1; - if(s->codec_id == CODEC_ID_MPEG2VIDEO){ - put_header(s, EXT_START_CODE); - put_bits(&s->pb, 4, 8); //pic ext - if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) { - put_bits(&s->pb, 4, s->f_code); - put_bits(&s->pb, 4, s->f_code); - }else{ - put_bits(&s->pb, 8, 255); - } - if (s->pict_type == B_TYPE) { - put_bits(&s->pb, 4, s->b_code); - put_bits(&s->pb, 4, s->b_code); - }else{ - put_bits(&s->pb, 8, 255); - } - put_bits(&s->pb, 2, s->intra_dc_precision); - - assert(s->picture_structure == PICT_FRAME); - put_bits(&s->pb, 2, s->picture_structure); - if (s->progressive_sequence) { - put_bits(&s->pb, 1, 0); /* no repeat */ - } else { - put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first); - } - /* XXX: optimize the generation of this flag with entropy - measures */ - s->frame_pred_frame_dct = s->progressive_sequence; - - put_bits(&s->pb, 1, s->frame_pred_frame_dct); - put_bits(&s->pb, 1, s->concealment_motion_vectors); - put_bits(&s->pb, 1, s->q_scale_type); - put_bits(&s->pb, 1, s->intra_vlc_format); - put_bits(&s->pb, 1, s->alternate_scan); - put_bits(&s->pb, 1, s->repeat_first_field); - s->progressive_frame = s->progressive_sequence; - put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */ - put_bits(&s->pb, 1, s->progressive_frame); - put_bits(&s->pb, 1, 0); //composite_display_flag - } - if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){ - int i; - - put_header(s, USER_START_CODE); - for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){ - put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]); - } - } - - s->mb_y=0; - ff_mpeg1_encode_slice_header(s); -} - -static inline void put_mb_modes(MpegEncContext *s, int n, int bits, - int has_mv, int field_motion) -{ - put_bits(&s->pb, n, bits); - if (!s->frame_pred_frame_dct) { - if (has_mv) - put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */ - put_bits(&s->pb, 1, s->interlaced_dct); - } -} - -static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s, - DCTELEM block[6][64], - int motion_x, int motion_y, - int mb_block_count) -{ - int i, cbp; - const int mb_x = s->mb_x; - const int mb_y = s->mb_y; - const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y; - - /* compute cbp */ - cbp = 0; - for(i=0;i<mb_block_count;i++) { - if (s->block_last_index[i] >= 0) - cbp |= 1 << (mb_block_count - 1 - i); - } - - if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 && - (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) && - ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) || - (s->pict_type == B_TYPE && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) | - ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) { - s->mb_skip_run++; - s->qscale -= s->dquant; - s->skip_count++; - s->misc_bits++; - s->last_bits++; - if(s->pict_type == P_TYPE){ - s->last_mv[0][1][0]= s->last_mv[0][0][0]= - s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0; - } - } else { - if(first_mb){ - assert(s->mb_skip_run == 0); - encode_mb_skip_run(s, s->mb_x); - }else{ - encode_mb_skip_run(s, s->mb_skip_run); - } - - if (s->pict_type == I_TYPE) { - if(s->dquant && cbp){ - put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */ - put_bits(&s->pb, 5, s->qscale); - }else{ - put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */ - s->qscale -= s->dquant; - } - s->misc_bits+= get_bits_diff(s); - s->i_count++; - } else if (s->mb_intra) { - if(s->dquant && cbp){ - put_mb_modes(s, 6, 0x01, 0, 0); - put_bits(&s->pb, 5, s->qscale); - }else{ - put_mb_modes(s, 5, 0x03, 0, 0); - s->qscale -= s->dquant; - } - s->misc_bits+= get_bits_diff(s); - s->i_count++; - memset(s->last_mv, 0, sizeof(s->last_mv)); - } else if (s->pict_type == P_TYPE) { - if(s->mv_type == MV_TYPE_16X16){ - if (cbp != 0) { - if ((motion_x|motion_y) == 0) { - if(s->dquant){ - put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */ - put_bits(&s->pb, 5, s->qscale); - }else{ - put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */ - } - s->misc_bits+= get_bits_diff(s); - } else { - if(s->dquant){ - put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */ - put_bits(&s->pb, 5, s->qscale); - }else{ - put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */ - } - s->misc_bits+= get_bits_diff(s); - mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added - mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added - s->mv_bits+= get_bits_diff(s); - } - } else { - put_bits(&s->pb, 3, 1); /* motion only */ - if (!s->frame_pred_frame_dct) - put_bits(&s->pb, 2, 2); /* motion_type: frame */ - s->misc_bits+= get_bits_diff(s); - mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added - mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added - s->qscale -= s->dquant; - s->mv_bits+= get_bits_diff(s); - } - s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x; - s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y; - }else{ - assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD); - - if (cbp) { - if(s->dquant){ - put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */ - put_bits(&s->pb, 5, s->qscale); - }else{ - put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */ - } - } else { - put_bits(&s->pb, 3, 1); /* motion only */ - put_bits(&s->pb, 2, 1); /* motion_type: field */ - s->qscale -= s->dquant; - } - s->misc_bits+= get_bits_diff(s); - for(i=0; i<2; i++){ - put_bits(&s->pb, 1, s->field_select[0][i]); - mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code); - mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code); - s->last_mv[0][i][0]= s->mv[0][i][0]; - s->last_mv[0][i][1]= 2*s->mv[0][i][1]; - } - s->mv_bits+= get_bits_diff(s); - } - if(cbp) { - if (s->chroma_y_shift) { - put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]); - } else { - put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]); - put_bits(&s->pb, 2, cbp & 3); - } - } - s->f_count++; - } else{ - static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi - - if(s->mv_type == MV_TYPE_16X16){ - if (cbp){ // With coded bloc pattern - if (s->dquant) { - if(s->mv_dir == MV_DIR_FORWARD) - put_mb_modes(s, 6, 3, 1, 0); - else - put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 0); - put_bits(&s->pb, 5, s->qscale); - } else { - put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 0); - } - }else{ // No coded bloc pattern - put_bits(&s->pb, mb_type_len[s->mv_dir], 2); - if (!s->frame_pred_frame_dct) - put_bits(&s->pb, 2, 2); /* motion_type: frame */ - s->qscale -= s->dquant; - } - s->misc_bits += get_bits_diff(s); - if (s->mv_dir&MV_DIR_FORWARD){ - mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code); - mpeg1_encode_motion(s, 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){ - mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code); - mpeg1_encode_motion(s, 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{ - assert(s->mv_type == MV_TYPE_FIELD); - assert(!s->frame_pred_frame_dct); - if (cbp){ // With coded bloc pattern - if (s->dquant) { - if(s->mv_dir == MV_DIR_FORWARD) - put_mb_modes(s, 6, 3, 1, 1); - else - put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 1); - put_bits(&s->pb, 5, s->qscale); - } else { - put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 1); - } - }else{ // No coded bloc pattern - put_bits(&s->pb, mb_type_len[s->mv_dir], 2); - put_bits(&s->pb, 2, 1); /* motion_type: field */ - s->qscale -= s->dquant; - } - s->misc_bits += get_bits_diff(s); - if (s->mv_dir&MV_DIR_FORWARD){ - for(i=0; i<2; i++){ - put_bits(&s->pb, 1, s->field_select[0][i]); - mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code); - mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code); - s->last_mv[0][i][0]= s->mv[0][i][0]; - s->last_mv[0][i][1]= 2*s->mv[0][i][1]; - } - s->f_count++; - } - if (s->mv_dir&MV_DIR_BACKWARD){ - for(i=0; i<2; i++){ - put_bits(&s->pb, 1, s->field_select[1][i]); - mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code); - mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code); - s->last_mv[1][i][0]= s->mv[1][i][0]; - s->last_mv[1][i][1]= 2*s->mv[1][i][1]; - } - s->b_count++; - } - } - s->mv_bits += get_bits_diff(s); - if(cbp) { - if (s->chroma_y_shift) { - put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]); - } else { - put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]); - put_bits(&s->pb, 2, cbp & 3); - } - } - } - for(i=0;i<mb_block_count;i++) { - if (cbp & (1 << (mb_block_count - 1 - i))) { - mpeg1_encode_block(s, block[i], i); - } - } - s->mb_skip_run = 0; - if(s->mb_intra) - s->i_tex_bits+= get_bits_diff(s); - else - s->p_tex_bits+= get_bits_diff(s); - } -} - -void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y) -{ - if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6); - else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8); -} - -// RAL: Parameter added: f_or_b_code -static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code) -{ - int code, bit_size, l, bits, range, sign; - - if (val == 0) { - /* zero vector */ - code = 0; - put_bits(&s->pb, - mbMotionVectorTable[0][1], - mbMotionVectorTable[0][0]); - } else { - bit_size = f_or_b_code - 1; - range = 1 << bit_size; - /* modulo encoding */ - l= INT_BIT - 5 - bit_size; - val= (val<<l)>>l; - - if (val >= 0) { - val--; - code = (val >> bit_size) + 1; - bits = val & (range - 1); - sign = 0; - } else { - val = -val; - val--; - code = (val >> bit_size) + 1; - bits = val & (range - 1); - sign = 1; - } - - assert(code > 0 && code <= 16); - - put_bits(&s->pb, - mbMotionVectorTable[code][1], - mbMotionVectorTable[code][0]); - - put_bits(&s->pb, 1, sign); - if (bit_size > 0) { - put_bits(&s->pb, bit_size, bits); - } - } -} - -void ff_mpeg1_encode_init(MpegEncContext *s) -{ - static int done=0; - - common_init(s); - - if(!done){ - int f_code; - int mv; - int i; - - done=1; - init_rl(&rl_mpeg1, 1); - if(s->intra_vlc_format) - init_rl(&rl_mpeg2, 1); - - for(i=0; i<64; i++) - { - mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i]; - mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i]; - } - - init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_len); - if(s->intra_vlc_format) - init_uni_ac_vlc(&rl_mpeg2, uni_mpeg2_ac_vlc_len); - - /* build unified dc encoding tables */ - for(i=-255; i<256; i++) - { - int adiff, index; - int bits, code; - int diff=i; - - adiff = FFABS(diff); - if(diff<0) diff--; - index = av_log2(2*adiff); - - bits= vlc_dc_lum_bits[index] + index; - code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)); - mpeg1_lum_dc_uni[i+255]= bits + (code<<8); - - bits= vlc_dc_chroma_bits[index] + index; - code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)); - mpeg1_chr_dc_uni[i+255]= bits + (code<<8); - } - - mv_penalty= av_mallocz( sizeof(uint8_t)*(MAX_FCODE+1)*(2*MAX_MV+1) ); - - for(f_code=1; f_code<=MAX_FCODE; f_code++){ - for(mv=-MAX_MV; mv<=MAX_MV; mv++){ - int len; - - if(mv==0) len= mbMotionVectorTable[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<17){ - len= mbMotionVectorTable[code][1] + 1 + bit_size; - }else{ - len= mbMotionVectorTable[16][1] + 2 + bit_size; - } - } - - mv_penalty[f_code][mv+MAX_MV]= len; - } - } - - - for(f_code=MAX_FCODE; f_code>0; f_code--){ - for(mv=-(8<<f_code); mv<(8<<f_code); mv++){ - fcode_tab[mv+MAX_MV]= f_code; - } - } - } - s->me.mv_penalty= mv_penalty; - s->fcode_tab= fcode_tab; - if(s->codec_id == CODEC_ID_MPEG1VIDEO){ - s->min_qcoeff=-255; - s->max_qcoeff= 255; - }else{ - s->min_qcoeff=-2047; - s->max_qcoeff= 2047; - } - if (s->intra_vlc_format) { - s->intra_ac_vlc_length= - s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len; - } else { - s->intra_ac_vlc_length= - s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len; - } - s->inter_ac_vlc_length= - s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len; -} - -static inline void encode_dc(MpegEncContext *s, int diff, int component) -{ - if(((unsigned) (diff+255)) >= 511){ - int index; - - if(diff<0){ - index= av_log2_16bit(-2*diff); - diff--; - }else{ - index= av_log2_16bit(2*diff); - } - if (component == 0) { - put_bits( - &s->pb, - vlc_dc_lum_bits[index] + index, - (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1))); - }else{ - put_bits( - &s->pb, - vlc_dc_chroma_bits[index] + index, - (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1))); - } - }else{ - if (component == 0) { - put_bits( - &s->pb, - mpeg1_lum_dc_uni[diff+255]&0xFF, - mpeg1_lum_dc_uni[diff+255]>>8); - } else { - put_bits( - &s->pb, - mpeg1_chr_dc_uni[diff+255]&0xFF, - mpeg1_chr_dc_uni[diff+255]>>8); - } - } -} - -static void mpeg1_encode_block(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign; - int code, component; - const uint16_t (*table_vlc)[2] = rl_mpeg1.table_vlc; - - last_index = s->block_last_index[n]; - - /* DC coef */ - if (s->mb_intra) { - component = (n <= 3 ? 0 : (n&1) + 1); - dc = block[0]; /* overflow is impossible */ - diff = dc - s->last_dc[component]; - encode_dc(s, diff, component); - s->last_dc[component] = dc; - i = 1; - if (s->intra_vlc_format) - table_vlc = rl_mpeg2.table_vlc; - } else { - /* encode the first coefficient : needs to be done here because - it is handled slightly differently */ - level = block[0]; - if (abs(level) == 1) { - code = ((uint32_t)level >> 31); /* the sign bit */ - put_bits(&s->pb, 2, code | 0x02); - i = 1; - } else { - i = 0; - last_non_zero = -1; - goto next_coef; - } - } - - /* now quantify & encode AC coefs */ - last_non_zero = i - 1; - - for(;i<=last_index;i++) { - j = s->intra_scantable.permutated[i]; - level = block[j]; - next_coef: -#if 0 - if (level != 0) - dprintf("level[%d]=%d\n", i, level); -#endif - /* encode using VLC */ - if (level != 0) { - run = i - last_non_zero - 1; - - alevel= level; - MASK_ABS(sign, alevel) - sign&=1; - - if (alevel <= mpeg1_max_level[0][run]){ - code= mpeg1_index_run[0][run] + alevel - 1; - /* store the vlc & sign at once */ - put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign); - } else { - /* escape seems to be pretty rare <5% so i dont optimize it */ - put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]); - /* escape: only clip in this case */ - put_bits(&s->pb, 6, run); - if(s->codec_id == CODEC_ID_MPEG1VIDEO){ - if (alevel < 128) { - put_bits(&s->pb, 8, level & 0xff); - } else { - if (level < 0) { - put_bits(&s->pb, 16, 0x8001 + level + 255); - } else { - put_bits(&s->pb, 16, level & 0xffff); - } - } - }else{ - put_bits(&s->pb, 12, level & 0xfff); - } - } - last_non_zero = i; - } - } - /* end of block */ - put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]); -} -#endif //CONFIG_ENCODERS - -/******************************************/ -/* decoding */ - -static VLC dc_lum_vlc; -static VLC dc_chroma_vlc; -static VLC mv_vlc; -static VLC mbincr_vlc; -static VLC mb_ptype_vlc; -static VLC mb_btype_vlc; -static VLC mb_pat_vlc; - -static void init_vlcs(void) -{ - static int done = 0; - - if (!done) { - done = 1; - - init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12, - vlc_dc_lum_bits, 1, 1, - vlc_dc_lum_code, 2, 2, 1); - init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12, - vlc_dc_chroma_bits, 1, 1, - vlc_dc_chroma_code, 2, 2, 1); - init_vlc(&mv_vlc, MV_VLC_BITS, 17, - &mbMotionVectorTable[0][1], 2, 1, - &mbMotionVectorTable[0][0], 2, 1, 1); - init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36, - &mbAddrIncrTable[0][1], 2, 1, - &mbAddrIncrTable[0][0], 2, 1, 1); - init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 64, - &mbPatTable[0][1], 2, 1, - &mbPatTable[0][0], 2, 1, 1); - - init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7, - &table_mb_ptype[0][1], 2, 1, - &table_mb_ptype[0][0], 2, 1, 1); - init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11, - &table_mb_btype[0][1], 2, 1, - &table_mb_btype[0][0], 2, 1, 1); - init_rl(&rl_mpeg1, 1); - init_rl(&rl_mpeg2, 1); - - init_2d_vlc_rl(&rl_mpeg1, 1); - init_2d_vlc_rl(&rl_mpeg2, 1); - } -} - -static inline int get_dmv(MpegEncContext *s) -{ - if(get_bits1(&s->gb)) - return 1 - (get_bits1(&s->gb) << 1); - else - return 0; -} - -static inline int get_qscale(MpegEncContext *s) -{ - int qscale = get_bits(&s->gb, 5); - if (s->q_scale_type) { - return non_linear_qscale[qscale]; - } else { - return qscale << 1; - } -} - -/* motion type (for mpeg2) */ -#define MT_FIELD 1 -#define MT_FRAME 2 -#define MT_16X8 2 -#define MT_DMV 3 - -static int mpeg_decode_mb(MpegEncContext *s, - DCTELEM block[12][64]) -{ - int i, j, k, cbp, val, mb_type, motion_type; - const int mb_block_count = 4 + (1<< s->chroma_format); - - dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y); - - assert(s->mb_skipped==0); - - if (s->mb_skip_run-- != 0) { - if(s->pict_type == I_TYPE){ - av_log(s->avctx, AV_LOG_ERROR, "skipped MB in I frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - - /* skip mb */ - s->mb_intra = 0; - for(i=0;i<12;i++) - s->block_last_index[i] = -1; - if(s->picture_structure == PICT_FRAME) - s->mv_type = MV_TYPE_16X16; - else - s->mv_type = MV_TYPE_FIELD; - if (s->pict_type == P_TYPE) { - /* if P type, zero motion vector is implied */ - s->mv_dir = MV_DIR_FORWARD; - s->mv[0][0][0] = s->mv[0][0][1] = 0; - s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0; - s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0; - s->field_select[0][0]= s->picture_structure - 1; - s->mb_skipped = 1; - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16; - } else { - int mb_type; - - if(s->mb_x) - mb_type= s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]; - else - mb_type= s->current_picture.mb_type[ s->mb_width + (s->mb_y-1)*s->mb_stride - 1]; // FIXME not sure if this is allowed in mpeg at all, - if(IS_INTRA(mb_type)) - return -1; - - /* if B type, reuse previous vectors and directions */ - s->mv[0][0][0] = s->last_mv[0][0][0]; - s->mv[0][0][1] = s->last_mv[0][0][1]; - s->mv[1][0][0] = s->last_mv[1][0][0]; - s->mv[1][0][1] = s->last_mv[1][0][1]; - - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= - mb_type | MB_TYPE_SKIP; -// assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8)); - - if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0) - s->mb_skipped = 1; - } - - return 0; - } - - switch(s->pict_type) { - default: - case I_TYPE: - if (get_bits1(&s->gb) == 0) { - if (get_bits1(&s->gb) == 0){ - av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA; - } else { - mb_type = MB_TYPE_INTRA; - } - break; - case P_TYPE: - mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1); - if (mb_type < 0){ - av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = ptype2mb_type[ mb_type ]; - break; - case B_TYPE: - mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1); - if (mb_type < 0){ - av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - mb_type = btype2mb_type[ mb_type ]; - break; - } - dprintf("mb_type=%x\n", mb_type); -// motion_type = 0; /* avoid warning */ - if (IS_INTRA(mb_type)) { - s->dsp.clear_blocks(s->block[0]); - - if(!s->chroma_y_shift){ - s->dsp.clear_blocks(s->block[6]); - } - - /* compute dct type */ - if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var? - !s->frame_pred_frame_dct) { - s->interlaced_dct = get_bits1(&s->gb); - } - - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - if (s->concealment_motion_vectors) { - /* just parse them */ - if (s->picture_structure != PICT_FRAME) - skip_bits1(&s->gb); /* field select */ - - s->mv[0][0][0]= s->last_mv[0][0][0]= s->last_mv[0][1][0] = - mpeg_decode_motion(s, s->mpeg_f_code[0][0], s->last_mv[0][0][0]); - s->mv[0][0][1]= s->last_mv[0][0][1]= s->last_mv[0][1][1] = - mpeg_decode_motion(s, s->mpeg_f_code[0][1], s->last_mv[0][0][1]); - - skip_bits1(&s->gb); /* marker */ - }else - memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */ - s->mb_intra = 1; -#ifdef HAVE_XVMC - //one 1 we memcpy blocks in xvmcvideo - if(s->avctx->xvmc_acceleration > 1){ - XVMC_pack_pblocks(s,-1);//inter are always full blocks - if(s->swap_uv){ - exchange_uv(s); - } - } -#endif - - if (s->codec_id == CODEC_ID_MPEG2VIDEO) { - if(s->flags2 & CODEC_FLAG2_FAST){ - for(i=0;i<6;i++) { - mpeg2_fast_decode_block_intra(s, s->pblocks[i], i); - } - }else{ - for(i=0;i<mb_block_count;i++) { - if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0) - return -1; - } - } - } else { - for(i=0;i<6;i++) { - if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0) - return -1; - } - } - } else { - if (mb_type & MB_TYPE_ZERO_MV){ - assert(mb_type & MB_TYPE_CBP); - - /* compute dct type */ - if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var? - !s->frame_pred_frame_dct) { - s->interlaced_dct = get_bits1(&s->gb); - } - - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - s->mv_dir = MV_DIR_FORWARD; - if(s->picture_structure == PICT_FRAME) - s->mv_type = MV_TYPE_16X16; - else{ - s->mv_type = MV_TYPE_FIELD; - mb_type |= MB_TYPE_INTERLACED; - s->field_select[0][0]= s->picture_structure - 1; - } - s->last_mv[0][0][0] = 0; - s->last_mv[0][0][1] = 0; - s->last_mv[0][1][0] = 0; - s->last_mv[0][1][1] = 0; - s->mv[0][0][0] = 0; - s->mv[0][0][1] = 0; - }else{ - assert(mb_type & MB_TYPE_L0L1); -//FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED - /* get additionnal motion vector type */ - if (s->frame_pred_frame_dct) - motion_type = MT_FRAME; - else{ - motion_type = get_bits(&s->gb, 2); - } - - /* compute dct type */ - if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var? - !s->frame_pred_frame_dct && HAS_CBP(mb_type)) { - s->interlaced_dct = get_bits1(&s->gb); - } - - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); - - /* motion vectors */ - s->mv_dir = 0; - for(i=0;i<2;i++) { - if (USES_LIST(mb_type, i)) { - s->mv_dir |= (MV_DIR_FORWARD >> i); - dprintf("motion_type=%d\n", motion_type); - switch(motion_type) { - case MT_FRAME: /* or MT_16X8 */ - if (s->picture_structure == PICT_FRAME) { - /* MT_FRAME */ - mb_type |= MB_TYPE_16x16; - s->mv_type = MV_TYPE_16X16; - s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] = - mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]); - s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] = - mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]); - /* full_pel: only for mpeg1 */ - if (s->full_pel[i]){ - s->mv[i][0][0] <<= 1; - s->mv[i][0][1] <<= 1; - } - } else { - /* MT_16X8 */ - mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; - s->mv_type = MV_TYPE_16X8; - for(j=0;j<2;j++) { - s->field_select[i][j] = get_bits1(&s->gb); - for(k=0;k<2;k++) { - val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], - s->last_mv[i][j][k]); - s->last_mv[i][j][k] = val; - s->mv[i][j][k] = val; - } - } - } - break; - case MT_FIELD: - s->mv_type = MV_TYPE_FIELD; - if (s->picture_structure == PICT_FRAME) { - mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; - for(j=0;j<2;j++) { - s->field_select[i][j] = get_bits1(&s->gb); - val = mpeg_decode_motion(s, s->mpeg_f_code[i][0], - s->last_mv[i][j][0]); - s->last_mv[i][j][0] = val; - s->mv[i][j][0] = val; - dprintf("fmx=%d\n", val); - val = mpeg_decode_motion(s, s->mpeg_f_code[i][1], - s->last_mv[i][j][1] >> 1); - s->last_mv[i][j][1] = val << 1; - s->mv[i][j][1] = val; - dprintf("fmy=%d\n", val); - } - } else { - mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; - s->field_select[i][0] = get_bits1(&s->gb); - for(k=0;k<2;k++) { - val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], - s->last_mv[i][0][k]); - s->last_mv[i][0][k] = val; - s->last_mv[i][1][k] = val; - s->mv[i][0][k] = val; - } - } - break; - case MT_DMV: - { - int dmx, dmy, mx, my, m; - - mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0], - s->last_mv[i][0][0]); - s->last_mv[i][0][0] = mx; - s->last_mv[i][1][0] = mx; - dmx = get_dmv(s); - my = mpeg_decode_motion(s, s->mpeg_f_code[i][1], - s->last_mv[i][0][1] >> 1); - dmy = get_dmv(s); - s->mv_type = MV_TYPE_DMV; - - - s->last_mv[i][0][1] = my<<1; - s->last_mv[i][1][1] = my<<1; - - s->mv[i][0][0] = mx; - s->mv[i][0][1] = my; - s->mv[i][1][0] = mx;//not used - s->mv[i][1][1] = my;//not used - - if (s->picture_structure == PICT_FRAME) { - mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; - - //m = 1 + 2 * s->top_field_first; - m = s->top_field_first ? 1 : 3; - - /* top -> top pred */ - s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx; - s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1; - m = 4 - m; - s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx; - s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1; - } else { - mb_type |= MB_TYPE_16x16; - - s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx; - s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy; - if(s->picture_structure == PICT_TOP_FIELD) - s->mv[i][2][1]--; - else - s->mv[i][2][1]++; - } - } - break; - default: - av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - } - } - } - - s->mb_intra = 0; - if (HAS_CBP(mb_type)) { - s->dsp.clear_blocks(s->block[0]); - - if(!s->chroma_y_shift){ - s->dsp.clear_blocks(s->block[6]); - } - - cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1); - if (cbp < 0 || ((cbp == 0) && (s->chroma_format < 2)) ){ - av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y); - return -1; - } - if(mb_block_count > 6){ - cbp<<= mb_block_count-6; - cbp |= get_bits(&s->gb, mb_block_count-6); - } - -#ifdef HAVE_XVMC - //on 1 we memcpy blocks in xvmcvideo - if(s->avctx->xvmc_acceleration > 1){ - XVMC_pack_pblocks(s,cbp); - if(s->swap_uv){ - exchange_uv(s); - } - } -#endif - - if (s->codec_id == CODEC_ID_MPEG2VIDEO) { - if(s->flags2 & CODEC_FLAG2_FAST){ - for(i=0;i<6;i++) { - if(cbp & 32) { - mpeg2_fast_decode_block_non_intra(s, s->pblocks[i], i); - } else { - s->block_last_index[i] = -1; - } - cbp+=cbp; - } - }else{ - cbp<<= 12-mb_block_count; - - for(i=0;i<mb_block_count;i++) { - if ( cbp & (1<<11) ) { - if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - cbp+=cbp; - } - } - } else { - if(s->flags2 & CODEC_FLAG2_FAST){ - for(i=0;i<6;i++) { - if (cbp & 32) { - mpeg1_fast_decode_block_inter(s, s->pblocks[i], i); - } else { - s->block_last_index[i] = -1; - } - cbp+=cbp; - } - }else{ - for(i=0;i<6;i++) { - if (cbp & 32) { - if (mpeg1_decode_block_inter(s, s->pblocks[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - cbp+=cbp; - } - } - } - }else{ - for(i=0;i<12;i++) - s->block_last_index[i] = -1; - } - } - - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type; - - return 0; -} - -/* as h263, but only 17 codes */ -static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred) -{ - int code, sign, val, l, shift; - - 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 = fcode - 1; - val = code; - if (shift) { - val = (val - 1) << shift; - val |= get_bits(&s->gb, shift); - val++; - } - if (sign) - val = -val; - val += pred; - - /* modulo decoding */ - l= INT_BIT - 5 - shift; - val = (val<<l)>>l; - return val; -} - -static inline int decode_dc(GetBitContext *gb, int component) -{ - int code, diff; - - if (component == 0) { - code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2); - } else { - code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2); - } - if (code < 0){ - av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n"); - return 0xffff; - } - if (code == 0) { - diff = 0; - } else { - diff = get_xbits(gb, code); - } - return diff; -} - -static inline int mpeg1_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, dc, diff, i, j, run; - int component; - RLTable *rl = &rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix= s->intra_matrix; - const int qscale= s->qscale; - - /* DC coef */ - component = (n <= 3 ? 0 : n - 4 + 1); - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc<<3; - dprintf("dc=%d diff=%d\n", dc, diff); - i = 0; - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefs */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level == 127){ - break; - } else if(level != 0) { - i += run; - j = scantable[i]; - level= (level*qscale*quant_matrix[j])>>4; - level= (level-1)|1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); - if (level == -128) { - level = SHOW_UBITS(re, &s->gb, 8) - 256; LAST_SKIP_BITS(re, &s->gb, 8); - } else if (level == 0) { - level = SHOW_UBITS(re, &s->gb, 8) ; LAST_SKIP_BITS(re, &s->gb, 8); - } - i += run; - j = scantable[i]; - if(level<0){ - level= -level; - level= (level*qscale*quant_matrix[j])>>4; - level= (level-1)|1; - level= -level; - }else{ - level= (level*qscale*quant_matrix[j])>>4; - level= (level-1)|1; - } - } - 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[j] = level; - } - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg1_decode_block_inter(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, i, j, run; - RLTable *rl = &rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix= s->inter_matrix; - const int qscale= s->qscale; - - { - OPEN_READER(re, &s->gb); - i = -1; - /* special case for the first coef. no need to add a second vlc table */ - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level= (3*qscale*quant_matrix[0])>>5; - level= (level-1)|1; - if(GET_CACHE(re, &s->gb)&0x40000000) - level= -level; - block[0] = level; - i++; - SKIP_BITS(re, &s->gb, 2); - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } - - /* now quantify & encode AC coefs */ - for(;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level != 0) { - i += run; - j = scantable[i]; - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - level= (level-1)|1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); - if (level == -128) { - level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8); - } else if (level == 0) { - level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8); - } - i += run; - j = scantable[i]; - if(level<0){ - level= -level; - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - level= (level-1)|1; - level= -level; - }else{ - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - level= (level-1)|1; - } - } - 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[j] = level; - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; - UPDATE_CACHE(re, &s->gb); - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n) -{ - int level, i, j, run; - RLTable *rl = &rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const int qscale= s->qscale; - - { - OPEN_READER(re, &s->gb); - i = -1; - /* special case for the first coef. no need to add a second vlc table */ - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level= (3*qscale)>>1; - level= (level-1)|1; - if(GET_CACHE(re, &s->gb)&0x40000000) - level= -level; - block[0] = level; - i++; - SKIP_BITS(re, &s->gb, 2); - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } - - /* now quantify & encode AC coefs */ - for(;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level != 0) { - i += run; - j = scantable[i]; - level= ((level*2+1)*qscale)>>1; - level= (level-1)|1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 8); SKIP_BITS(re, &s->gb, 8); - if (level == -128) { - level = SHOW_UBITS(re, &s->gb, 8) - 256; SKIP_BITS(re, &s->gb, 8); - } else if (level == 0) { - level = SHOW_UBITS(re, &s->gb, 8) ; SKIP_BITS(re, &s->gb, 8); - } - i += run; - j = scantable[i]; - if(level<0){ - level= -level; - level= ((level*2+1)*qscale)>>1; - level= (level-1)|1; - level= -level; - }else{ - level= ((level*2+1)*qscale)>>1; - level= (level-1)|1; - } - } - - block[j] = level; - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; - UPDATE_CACHE(re, &s->gb); - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - - -static inline int mpeg2_decode_block_non_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, i, j, run; - RLTable *rl = &rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix; - const int qscale= s->qscale; - int mismatch; - - mismatch = 1; - - { - OPEN_READER(re, &s->gb); - i = -1; - if (n < 4) - quant_matrix = s->inter_matrix; - else - quant_matrix = s->chroma_inter_matrix; - - /* special case for the first coef. no need to add a second vlc table */ - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level= (3*qscale*quant_matrix[0])>>5; - if(GET_CACHE(re, &s->gb)&0x40000000) - level= -level; - block[0] = level; - mismatch ^= level; - i++; - SKIP_BITS(re, &s->gb, 2); - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } - - /* now quantify & encode AC coefs */ - for(;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level != 0) { - i += run; - j = scantable[i]; - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - - i += run; - j = scantable[i]; - if(level<0){ - level= ((-level*2+1)*qscale*quant_matrix[j])>>5; - level= -level; - }else{ - level= ((level*2+1)*qscale*quant_matrix[j])>>5; - } - } - 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; - } - - mismatch ^= level; - block[j] = level; - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; - UPDATE_CACHE(re, &s->gb); - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - } - block[63] ^= (mismatch & 1); - - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg2_fast_decode_block_non_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, i, j, run; - RLTable *rl = &rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const int qscale= s->qscale; - OPEN_READER(re, &s->gb); - i = -1; - - /* special case for the first coef. no need to add a second vlc table */ - UPDATE_CACHE(re, &s->gb); - if (((int32_t)GET_CACHE(re, &s->gb)) < 0) { - level= (3*qscale)>>1; - if(GET_CACHE(re, &s->gb)&0x40000000) - level= -level; - block[0] = level; - i++; - SKIP_BITS(re, &s->gb, 2); - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - goto end; - } - - /* now quantify & encode AC coefs */ - for(;;) { - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level != 0) { - i += run; - j = scantable[i]; - level= ((level*2+1)*qscale)>>1; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - - i += run; - j = scantable[i]; - if(level<0){ - level= ((-level*2+1)*qscale)>>1; - level= -level; - }else{ - level= ((level*2+1)*qscale)>>1; - } - } - - block[j] = level; - if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF) - break; - UPDATE_CACHE(re, &s->gb); - } -end: - LAST_SKIP_BITS(re, &s->gb, 2); - CLOSE_READER(re, &s->gb); - s->block_last_index[n] = i; - return 0; -} - - -static inline int mpeg2_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, dc, diff, i, j, run; - int component; - RLTable *rl; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix; - const int qscale= s->qscale; - int mismatch; - - /* DC coef */ - if (n < 4){ - quant_matrix = s->intra_matrix; - component = 0; - }else{ - quant_matrix = s->chroma_intra_matrix; - component = (n&1) + 1; - } - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc << (3 - s->intra_dc_precision); - dprintf("dc=%d\n", block[0]); - mismatch = block[0] ^ 1; - i = 0; - if (s->intra_vlc_format) - rl = &rl_mpeg2; - else - rl = &rl_mpeg1; - - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefs */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level == 127){ - break; - } else if(level != 0) { - i += run; - j = scantable[i]; - level= (level*qscale*quant_matrix[j])>>4; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - i += run; - j = scantable[i]; - if(level<0){ - level= (-level*qscale*quant_matrix[j])>>4; - level= -level; - }else{ - level= (level*qscale*quant_matrix[j])>>4; - } - } - 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; - } - - mismatch^= level; - block[j] = level; - } - CLOSE_READER(re, &s->gb); - } - block[63]^= mismatch&1; - - s->block_last_index[n] = i; - return 0; -} - -static inline int mpeg2_fast_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, dc, diff, j, run; - int component; - RLTable *rl; - uint8_t * scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix; - const int qscale= s->qscale; - - /* DC coef */ - if (n < 4){ - quant_matrix = s->intra_matrix; - component = 0; - }else{ - quant_matrix = s->chroma_intra_matrix; - component = (n&1) + 1; - } - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc << (3 - s->intra_dc_precision); - if (s->intra_vlc_format) - rl = &rl_mpeg2; - else - rl = &rl_mpeg1; - - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefs */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0); - - if(level == 127){ - break; - } else if(level != 0) { - scantable += run; - j = *scantable; - level= (level*qscale*quant_matrix[j])>>4; - level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); - LAST_SKIP_BITS(re, &s->gb, 1); - } else { - /* escape */ - run = SHOW_UBITS(re, &s->gb, 6)+1; LAST_SKIP_BITS(re, &s->gb, 6); - UPDATE_CACHE(re, &s->gb); - level = SHOW_SBITS(re, &s->gb, 12); SKIP_BITS(re, &s->gb, 12); - scantable += run; - j = *scantable; - if(level<0){ - level= (-level*qscale*quant_matrix[j])>>4; - level= -level; - }else{ - level= (level*qscale*quant_matrix[j])>>4; - } - } - - block[j] = level; - } - CLOSE_READER(re, &s->gb); - } - - s->block_last_index[n] = scantable - s->intra_scantable.permutated; - return 0; -} - -typedef struct Mpeg1Context { - MpegEncContext mpeg_enc_ctx; - int mpeg_enc_ctx_allocated; /* true if decoding context allocated */ - int repeat_field; /* true if we must repeat the field */ - AVPanScan pan_scan; /** some temporary storage for the panscan */ - int slice_count; - int swap_uv;//indicate VCR2 - int save_aspect_info; - AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator - -} Mpeg1Context; - -static int mpeg_decode_init(AVCodecContext *avctx) -{ - Mpeg1Context *s = avctx->priv_data; - MpegEncContext *s2 = &s->mpeg_enc_ctx; - int i; - - //we need some parmutation to store - //matrixes, until MPV_common_init() - //set the real permutatuon - for(i=0;i<64;i++) - s2->dsp.idct_permutation[i]=i; - - MPV_decode_defaults(s2); - - s->mpeg_enc_ctx.avctx= avctx; - s->mpeg_enc_ctx.flags= avctx->flags; - s->mpeg_enc_ctx.flags2= avctx->flags2; - common_init(&s->mpeg_enc_ctx); - init_vlcs(); - - s->mpeg_enc_ctx_allocated = 0; - s->mpeg_enc_ctx.picture_number = 0; - s->repeat_field = 0; - s->mpeg_enc_ctx.codec_id= avctx->codec->id; - return 0; -} - -static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm, - const uint8_t *new_perm){ - uint16_t temp_matrix[64]; - int i; - - memcpy(temp_matrix,matrix,64*sizeof(uint16_t)); - - for(i=0;i<64;i++){ - matrix[new_perm[i]] = temp_matrix[old_perm[i]]; - } -} - -//Call this function when we know all parameters -//it may be called in different places for mpeg1 and mpeg2 -static int mpeg_decode_postinit(AVCodecContext *avctx){ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - uint8_t old_permutation[64]; - - if ( - (s1->mpeg_enc_ctx_allocated == 0)|| - avctx->coded_width != s->width || - avctx->coded_height != s->height|| - s1->save_aspect_info != s->aspect_ratio_info|| - 0) - { - - if (s1->mpeg_enc_ctx_allocated) { - ParseContext pc= s->parse_context; - s->parse_context.buffer=0; - MPV_common_end(s); - s->parse_context= pc; - } - - if( (s->width == 0 )||(s->height == 0)) - return -2; - - avcodec_set_dimensions(avctx, s->width, s->height); - avctx->bit_rate = s->bit_rate; - s1->save_aspect_info = s->aspect_ratio_info; - - //low_delay may be forced, in this case we will have B frames - //that behave like P frames - avctx->has_b_frames = !(s->low_delay); - - if(avctx->sub_id==1){//s->codec_id==avctx->codec_id==CODEC_ID - //mpeg1 fps - avctx->time_base.den= ff_frame_rate_tab[s->frame_rate_index].num; - avctx->time_base.num= ff_frame_rate_tab[s->frame_rate_index].den; - //mpeg1 aspect - avctx->sample_aspect_ratio= av_d2q( - 1.0/mpeg1_aspect[s->aspect_ratio_info], 255); - - }else{//mpeg2 - //mpeg2 fps - av_reduce( - &s->avctx->time_base.den, - &s->avctx->time_base.num, - ff_frame_rate_tab[s->frame_rate_index].num * s1->frame_rate_ext.num, - ff_frame_rate_tab[s->frame_rate_index].den * s1->frame_rate_ext.den, - 1<<30); - //mpeg2 aspect - if(s->aspect_ratio_info > 1){ - if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) ){ - s->avctx->sample_aspect_ratio= - av_div_q( - mpeg2_aspect[s->aspect_ratio_info], - (AVRational){s->width, s->height} - ); - }else{ - s->avctx->sample_aspect_ratio= - av_div_q( - mpeg2_aspect[s->aspect_ratio_info], - (AVRational){s1->pan_scan.width, s1->pan_scan.height} - ); - } - }else{ - s->avctx->sample_aspect_ratio= - mpeg2_aspect[s->aspect_ratio_info]; - } - }//mpeg2 - - if(avctx->xvmc_acceleration){ - avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420); - }else{ - if(s->chroma_format < 2){ - avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420); - }else - if(s->chroma_format == 2){ - avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_422); - }else - if(s->chroma_format > 2){ - avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_444); - } - } - //until then pix_fmt may be changed right after codec init - if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT ) - if( avctx->idct_algo == FF_IDCT_AUTO ) - avctx->idct_algo = FF_IDCT_SIMPLE; - - //quantization matrixes may need reordering - //if dct permutation is changed - memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t)); - - if (MPV_common_init(s) < 0) - return -2; - - quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation); - quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation); - quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation); - quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation); - - s1->mpeg_enc_ctx_allocated = 1; - } - return 0; -} - -static int mpeg1_decode_picture(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int ref, f_code, vbv_delay; - - if(mpeg_decode_postinit(s->avctx) < 0) - return -2; - - init_get_bits(&s->gb, buf, buf_size*8); - - ref = get_bits(&s->gb, 10); /* temporal ref */ - s->pict_type = get_bits(&s->gb, 3); - if(s->pict_type == 0 || s->pict_type > 3) - return -1; - - vbv_delay= get_bits(&s->gb, 16); - if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) { - s->full_pel[0] = get_bits1(&s->gb); - f_code = get_bits(&s->gb, 3); - if (f_code == 0 && avctx->error_resilience >= FF_ER_COMPLIANT) - return -1; - s->mpeg_f_code[0][0] = f_code; - s->mpeg_f_code[0][1] = f_code; - } - if (s->pict_type == B_TYPE) { - s->full_pel[1] = get_bits1(&s->gb); - f_code = get_bits(&s->gb, 3); - if (f_code == 0 && avctx->error_resilience >= FF_ER_COMPLIANT) - return -1; - s->mpeg_f_code[1][0] = f_code; - s->mpeg_f_code[1][1] = f_code; - } - s->current_picture.pict_type= s->pict_type; - s->current_picture.key_frame= s->pict_type == I_TYPE; - - if(avctx->debug & FF_DEBUG_PICT_INFO) - av_log(avctx, AV_LOG_DEBUG, "vbv_delay %d, ref %d type:%d\n", vbv_delay, ref, s->pict_type); - - s->y_dc_scale = 8; - s->c_dc_scale = 8; - s->first_slice = 1; - return 0; -} - -static void mpeg_decode_sequence_extension(Mpeg1Context *s1) -{ - MpegEncContext *s= &s1->mpeg_enc_ctx; - int horiz_size_ext, vert_size_ext; - int bit_rate_ext; - - skip_bits(&s->gb, 1); /* profil and level esc*/ - s->avctx->profile= get_bits(&s->gb, 3); - s->avctx->level= get_bits(&s->gb, 4); - s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */ - s->chroma_format = get_bits(&s->gb, 2); /* chroma_format 1=420, 2=422, 3=444 */ - horiz_size_ext = get_bits(&s->gb, 2); - vert_size_ext = get_bits(&s->gb, 2); - s->width |= (horiz_size_ext << 12); - s->height |= (vert_size_ext << 12); - bit_rate_ext = get_bits(&s->gb, 12); /* XXX: handle it */ - s->bit_rate += (bit_rate_ext << 18) * 400; - skip_bits1(&s->gb); /* marker */ - s->avctx->rc_buffer_size += get_bits(&s->gb, 8)*1024*16<<10; - - s->low_delay = get_bits1(&s->gb); - if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1; - - s1->frame_rate_ext.num = get_bits(&s->gb, 2)+1; - s1->frame_rate_ext.den = get_bits(&s->gb, 5)+1; - - dprintf("sequence extension\n"); - s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO; - s->avctx->sub_id = 2; /* indicates mpeg2 found */ - - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n", - s->avctx->profile, s->avctx->level, s->avctx->rc_buffer_size, s->bit_rate); - -} - -static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1) -{ - MpegEncContext *s= &s1->mpeg_enc_ctx; - int color_description, w, h; - - skip_bits(&s->gb, 3); /* video format */ - color_description= get_bits1(&s->gb); - if(color_description){ - skip_bits(&s->gb, 8); /* color primaries */ - skip_bits(&s->gb, 8); /* transfer_characteristics */ - skip_bits(&s->gb, 8); /* matrix_coefficients */ - } - w= get_bits(&s->gb, 14); - skip_bits(&s->gb, 1); //marker - h= get_bits(&s->gb, 14); - skip_bits(&s->gb, 1); //marker - - s1->pan_scan.width= 16*w; - s1->pan_scan.height=16*h; - - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h); -} - -static void mpeg_decode_picture_display_extension(Mpeg1Context *s1) -{ - MpegEncContext *s= &s1->mpeg_enc_ctx; - int i,nofco; - - nofco = 1; - if(s->progressive_sequence){ - if(s->repeat_first_field){ - nofco++; - if(s->top_field_first) - nofco++; - } - }else{ - if(s->picture_structure == PICT_FRAME){ - nofco++; - if(s->repeat_first_field) - nofco++; - } - } - for(i=0; i<nofco; i++){ - s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16); - skip_bits(&s->gb, 1); //marker - s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16); - skip_bits(&s->gb, 1); //marker - } - - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "pde (%d,%d) (%d,%d) (%d,%d)\n", - s1->pan_scan.position[0][0], s1->pan_scan.position[0][1], - s1->pan_scan.position[1][0], s1->pan_scan.position[1][1], - s1->pan_scan.position[2][0], s1->pan_scan.position[2][1] - ); -} - -static void mpeg_decode_quant_matrix_extension(MpegEncContext *s) -{ - int i, v, j; - - dprintf("matrix extension\n"); - - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - } - } - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } - } - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->chroma_intra_matrix[j] = v; - } - } - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->chroma_inter_matrix[j] = v; - } - } -} - -static void mpeg_decode_picture_coding_extension(MpegEncContext *s) -{ - s->full_pel[0] = s->full_pel[1] = 0; - s->mpeg_f_code[0][0] = get_bits(&s->gb, 4); - s->mpeg_f_code[0][1] = get_bits(&s->gb, 4); - s->mpeg_f_code[1][0] = get_bits(&s->gb, 4); - s->mpeg_f_code[1][1] = get_bits(&s->gb, 4); - s->intra_dc_precision = get_bits(&s->gb, 2); - s->picture_structure = get_bits(&s->gb, 2); - s->top_field_first = get_bits1(&s->gb); - s->frame_pred_frame_dct = get_bits1(&s->gb); - s->concealment_motion_vectors = get_bits1(&s->gb); - s->q_scale_type = get_bits1(&s->gb); - s->intra_vlc_format = get_bits1(&s->gb); - s->alternate_scan = get_bits1(&s->gb); - s->repeat_first_field = get_bits1(&s->gb); - s->chroma_420_type = get_bits1(&s->gb); - s->progressive_frame = get_bits1(&s->gb); - - if(s->picture_structure == PICT_FRAME){ - s->first_field=0; - s->v_edge_pos= 16*s->mb_height; - }else{ - s->first_field ^= 1; - s->v_edge_pos= 8*s->mb_height; - memset(s->mbskip_table, 0, s->mb_stride*s->mb_height); - } - - 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); - }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); - } - - /* composite display not parsed */ - dprintf("intra_dc_precision=%d\n", s->intra_dc_precision); - dprintf("picture_structure=%d\n", s->picture_structure); - dprintf("top field first=%d\n", s->top_field_first); - dprintf("repeat first field=%d\n", s->repeat_first_field); - dprintf("conceal=%d\n", s->concealment_motion_vectors); - dprintf("intra_vlc_format=%d\n", s->intra_vlc_format); - dprintf("alternate_scan=%d\n", s->alternate_scan); - dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct); - dprintf("progressive_frame=%d\n", s->progressive_frame); -} - -static void mpeg_decode_extension(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int ext_type; - - init_get_bits(&s->gb, buf, buf_size*8); - - ext_type = get_bits(&s->gb, 4); - switch(ext_type) { - case 0x1: - mpeg_decode_sequence_extension(s1); - break; - case 0x2: - mpeg_decode_sequence_display_extension(s1); - break; - case 0x3: - mpeg_decode_quant_matrix_extension(s); - break; - case 0x7: - mpeg_decode_picture_display_extension(s1); - break; - case 0x8: - mpeg_decode_picture_coding_extension(s); - break; - } -} - -static void exchange_uv(MpegEncContext *s){ - short * tmp = s->pblocks[4]; - s->pblocks[4] = s->pblocks[5]; - s->pblocks[5] = tmp; -} - -static int mpeg_field_start(MpegEncContext *s){ - AVCodecContext *avctx= s->avctx; - Mpeg1Context *s1 = (Mpeg1Context*)s; - - /* start frame decoding */ - if(s->first_field || s->picture_structure==PICT_FRAME){ - if(MPV_frame_start(s, avctx) < 0) - return -1; - - ff_er_frame_start(s); - - /* first check if we must repeat the frame */ - s->current_picture_ptr->repeat_pict = 0; - if (s->repeat_first_field) { - if (s->progressive_sequence) { - if (s->top_field_first) - s->current_picture_ptr->repeat_pict = 4; - else - s->current_picture_ptr->repeat_pict = 2; - } else if (s->progressive_frame) { - s->current_picture_ptr->repeat_pict = 1; - } - } - - *s->current_picture_ptr->pan_scan= s1->pan_scan; - }else{ //second field - int i; - - if(!s->current_picture_ptr){ - av_log(s->avctx, AV_LOG_ERROR, "first field missing\n"); - return -1; - } - - for(i=0; i<4; i++){ - s->current_picture.data[i] = s->current_picture_ptr->data[i]; - if(s->picture_structure == PICT_BOTTOM_FIELD){ - s->current_picture.data[i] += s->current_picture_ptr->linesize[i]; - } - } - } -#ifdef HAVE_XVMC -// MPV_frame_start will call this function too, -// but we need to call it on every field - if(s->avctx->xvmc_acceleration) - XVMC_field_start(s,avctx); -#endif - - return 0; -} - -#define DECODE_SLICE_ERROR -1 -#define DECODE_SLICE_OK 0 - -/** - * decodes a slice. MpegEncContext.mb_y must be set to the MB row from the startcode - * @return DECODE_SLICE_ERROR if the slice is damaged<br> - * DECODE_SLICE_OK if this slice is ok<br> - */ -static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y, - const uint8_t **buf, int buf_size) -{ - MpegEncContext *s = &s1->mpeg_enc_ctx; - AVCodecContext *avctx= s->avctx; - int ret; - const int field_pic= s->picture_structure != PICT_FRAME; - const int lowres= s->avctx->lowres; - - s->resync_mb_x= - s->resync_mb_y= -1; - - if (mb_y<<field_pic >= s->mb_height){ - av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s->mb_height); - return -1; - } - - init_get_bits(&s->gb, *buf, buf_size*8); - - ff_mpeg1_clean_buffers(s); - s->interlaced_dct = 0; - - s->qscale = get_qscale(s); - - if(s->qscale == 0){ - av_log(s->avctx, AV_LOG_ERROR, "qscale == 0\n"); - return -1; - } - - /* extra slice info */ - while (get_bits1(&s->gb) != 0) { - skip_bits(&s->gb, 8); - } - - s->mb_x=0; - - for(;;) { - int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2); - if (code < 0){ - av_log(s->avctx, AV_LOG_ERROR, "first mb_incr damaged\n"); - return -1; - } - if (code >= 33) { - if (code == 33) { - s->mb_x += 33; - } - /* otherwise, stuffing, nothing to do */ - } else { - s->mb_x += code; - break; - } - } - - s->resync_mb_x= s->mb_x; - s->resync_mb_y= s->mb_y= mb_y; - s->mb_skip_run= 0; - ff_init_block_index(s); - - if (s->mb_y==0 && s->mb_x==0 && (s->first_field || s->picture_structure==PICT_FRAME)) { - if(s->avctx->debug&FF_DEBUG_PICT_INFO){ - av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%2d%2d%2d%2d %s %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n", - s->qscale, s->mpeg_f_code[0][0],s->mpeg_f_code[0][1],s->mpeg_f_code[1][0],s->mpeg_f_code[1][1], - s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")), - s->progressive_sequence ? "ps" :"", s->progressive_frame ? "pf" : "", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"", - s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors, - s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :""); - } - } - - for(;;) { -#ifdef HAVE_XVMC - //one 1 we memcpy blocks in xvmcvideo - if(s->avctx->xvmc_acceleration > 1) - XVMC_init_block(s);//set s->block -#endif - - ret = mpeg_decode_mb(s, s->block); - s->chroma_qscale= s->qscale; - - dprintf("ret=%d\n", ret); - if (ret < 0) - return -1; - - if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs - const int wrap = field_pic ? 2*s->b8_stride : s->b8_stride; - int xy = s->mb_x*2 + s->mb_y*2*wrap; - int motion_x, motion_y, dir, i; - if(field_pic && !s->first_field) - xy += wrap/2; - - for(i=0; i<2; i++){ - for(dir=0; dir<2; dir++){ - if (s->mb_intra || (dir==1 && s->pict_type != B_TYPE)) { - motion_x = motion_y = 0; - }else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){ - motion_x = s->mv[dir][0][0]; - motion_y = s->mv[dir][0][1]; - } else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ { - motion_x = s->mv[dir][i][0]; - motion_y = s->mv[dir][i][1]; - } - - s->current_picture.motion_val[dir][xy ][0] = motion_x; - s->current_picture.motion_val[dir][xy ][1] = motion_y; - s->current_picture.motion_val[dir][xy + 1][0] = motion_x; - s->current_picture.motion_val[dir][xy + 1][1] = motion_y; - s->current_picture.ref_index [dir][xy ]= - s->current_picture.ref_index [dir][xy + 1]= s->field_select[dir][i]; - assert(s->field_select[dir][i]==0 || s->field_select[dir][i]==1); - } - xy += wrap; - } - } - - s->dest[0] += 16 >> lowres; - s->dest[1] += 16 >> (s->chroma_x_shift + lowres); - s->dest[2] += 16 >> (s->chroma_x_shift + lowres); - - MPV_decode_mb(s, s->block); - - if (++s->mb_x >= s->mb_width) { - const int mb_size= 16>>s->avctx->lowres; - - ff_draw_horiz_band(s, mb_size*s->mb_y, mb_size); - - s->mb_x = 0; - s->mb_y++; - - if(s->mb_y<<field_pic >= s->mb_height){ - int left= s->gb.size_in_bits - get_bits_count(&s->gb); - int is_d10= s->chroma_format==2 && s->pict_type==I_TYPE && avctx->profile==0 && avctx->level==5 - && s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0 - && s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/; - - if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10) - || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){ - av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23))); - return -1; - }else - goto eos; - } - - ff_init_block_index(s); - } - - /* skip mb handling */ - if (s->mb_skip_run == -1) { - /* read again increment */ - s->mb_skip_run = 0; - for(;;) { - int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2); - if (code < 0){ - av_log(s->avctx, AV_LOG_ERROR, "mb incr damaged\n"); - return -1; - } - if (code >= 33) { - if (code == 33) { - s->mb_skip_run += 33; - }else if(code == 35){ - if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){ - av_log(s->avctx, AV_LOG_ERROR, "slice mismatch\n"); - return -1; - } - goto eos; /* end of slice */ - } - /* otherwise, stuffing, nothing to do */ - } else { - s->mb_skip_run += code; - break; - } - } - } - } -eos: // end of slice - *buf += get_bits_count(&s->gb)/8 - 1; -//printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y); - return 0; -} - -static int slice_decode_thread(AVCodecContext *c, void *arg){ - MpegEncContext *s= arg; - const uint8_t *buf= s->gb.buffer; - int mb_y= s->start_mb_y; - - s->error_count= 3*(s->end_mb_y - s->start_mb_y)*s->mb_width; - - for(;;){ - uint32_t start_code; - int ret; - - ret= mpeg_decode_slice((Mpeg1Context*)s, mb_y, &buf, s->gb.buffer_end - buf); - emms_c(); -//av_log(c, AV_LOG_DEBUG, "ret:%d resync:%d/%d mb:%d/%d ts:%d/%d ec:%d\n", -//ret, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, s->start_mb_y, s->end_mb_y, s->error_count); - if(ret < 0){ - if(s->resync_mb_x>=0 && s->resync_mb_y>=0) - ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, AC_ERROR|DC_ERROR|MV_ERROR); - }else{ - ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END); - } - - if(s->mb_y == s->end_mb_y) - return 0; - - start_code= -1; - buf = ff_find_start_code(buf, s->gb.buffer_end, &start_code); - mb_y= start_code - SLICE_MIN_START_CODE; - if(mb_y < 0 || mb_y >= s->end_mb_y) - return -1; - } - - return 0; //not reached -} - -/** - * handles slice ends. - * @return 1 if it seems to be the last slice of - */ -static int slice_end(AVCodecContext *avctx, AVFrame *pict) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - - if (!s1->mpeg_enc_ctx_allocated || !s->current_picture_ptr) - return 0; - -#ifdef HAVE_XVMC - if(s->avctx->xvmc_acceleration) - XVMC_field_end(s); -#endif - /* end of slice reached */ - if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) { - /* end of image */ - - s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2; - - ff_er_frame_end(s); - - MPV_frame_end(s); - - if (s->pict_type == B_TYPE || s->low_delay) { - *pict= *(AVFrame*)s->current_picture_ptr; - ff_print_debug_info(s, pict); - } else { - s->picture_number++; - /* latency of 1 frame for I and P frames */ - /* XXX: use another variable than picture_number */ - if (s->last_picture_ptr != NULL) { - *pict= *(AVFrame*)s->last_picture_ptr; - ff_print_debug_info(s, pict); - } - } - - return 1; - } else { - return 0; - } -} - -static int mpeg1_decode_sequence(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int width,height; - int i, v, j; - - init_get_bits(&s->gb, buf, buf_size*8); - - width = get_bits(&s->gb, 12); - height = get_bits(&s->gb, 12); - if (width <= 0 || height <= 0 || - (width % 2) != 0 || (height % 2) != 0) - return -1; - s->aspect_ratio_info= get_bits(&s->gb, 4); - if (s->aspect_ratio_info == 0) - return -1; - s->frame_rate_index = get_bits(&s->gb, 4); - if (s->frame_rate_index == 0 || s->frame_rate_index > 13) - return -1; - s->bit_rate = get_bits(&s->gb, 18) * 400; - if (get_bits1(&s->gb) == 0) /* marker */ - return -1; - s->width = width; - s->height = height; - - s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16; - skip_bits(&s->gb, 1); - - /* get matrix */ - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - if(v==0){ - av_log(s->avctx, AV_LOG_ERROR, "intra matrix damaged\n"); - return -1; - } - j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - } -#ifdef DEBUG - dprintf("intra matrix present\n"); - for(i=0;i<64;i++) - dprintf(" %d", s->intra_matrix[s->dsp.idct_permutation[i]]); - dprintf("\n"); -#endif - } else { - for(i=0;i<64;i++) { - j = s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_intra_matrix[i]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - } - } - if (get_bits1(&s->gb)) { - for(i=0;i<64;i++) { - v = get_bits(&s->gb, 8); - if(v==0){ - av_log(s->avctx, AV_LOG_ERROR, "inter matrix damaged\n"); - return -1; - } - j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } -#ifdef DEBUG - dprintf("non intra matrix present\n"); - for(i=0;i<64;i++) - dprintf(" %d", s->inter_matrix[s->dsp.idct_permutation[i]]); - dprintf("\n"); -#endif - } else { - for(i=0;i<64;i++) { - int j= s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_non_intra_matrix[i]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } - } - - if(show_bits(&s->gb, 23) != 0){ - av_log(s->avctx, AV_LOG_ERROR, "sequence header damaged\n"); - return -1; - } - - /* we set mpeg2 parameters so that it emulates mpeg1 */ - s->progressive_sequence = 1; - s->progressive_frame = 1; - s->picture_structure = PICT_FRAME; - s->frame_pred_frame_dct = 1; - s->chroma_format = 1; - s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO; - avctx->sub_id = 1; /* indicates mpeg1 */ - s->out_format = FMT_MPEG1; - s->swap_uv = 0;//AFAIK VCR2 don't have SEQ_HEADER - if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1; - - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "vbv buffer: %d, bitrate:%d\n", - s->avctx->rc_buffer_size, s->bit_rate); - - return 0; -} - -static int vcr2_init_sequence(AVCodecContext *avctx) -{ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - int i, v; - - /* start new mpeg1 context decoding */ - s->out_format = FMT_MPEG1; - if (s1->mpeg_enc_ctx_allocated) { - MPV_common_end(s); - } - s->width = avctx->coded_width; - s->height = avctx->coded_height; - avctx->has_b_frames= 0; //true? - s->low_delay= 1; - - if(avctx->xvmc_acceleration){ - avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420); - }else{ - avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420); - } - - if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT ) - if( avctx->idct_algo == FF_IDCT_AUTO ) - avctx->idct_algo = FF_IDCT_SIMPLE; - - if (MPV_common_init(s) < 0) - return -1; - exchange_uv(s);//common init reset pblocks, so we swap them here - s->swap_uv = 1;// in case of xvmc we need to swap uv for each MB - s1->mpeg_enc_ctx_allocated = 1; - - for(i=0;i<64;i++) { - int j= s->dsp.idct_permutation[i]; - v = ff_mpeg1_default_intra_matrix[i]; - s->intra_matrix[j] = v; - s->chroma_intra_matrix[j] = v; - - v = ff_mpeg1_default_non_intra_matrix[i]; - s->inter_matrix[j] = v; - s->chroma_inter_matrix[j] = v; - } - - s->progressive_sequence = 1; - s->progressive_frame = 1; - s->picture_structure = PICT_FRAME; - s->frame_pred_frame_dct = 1; - s->chroma_format = 1; - s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO; - avctx->sub_id = 2; /* indicates mpeg2 */ - return 0; -} - - -static void mpeg_decode_user_data(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - const uint8_t *p; - int len, flags; - p = buf; - len = buf_size; - - /* we parse the DTG active format information */ - if (len >= 5 && - p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') { - flags = p[4]; - p += 5; - len -= 5; - if (flags & 0x80) { - /* skip event id */ - if (len < 2) - return; - p += 2; - len -= 2; - } - if (flags & 0x40) { - if (len < 1) - return; - avctx->dtg_active_format = p[0] & 0x0f; - } - } -} - -static void mpeg_decode_gop(AVCodecContext *avctx, - const uint8_t *buf, int buf_size){ - Mpeg1Context *s1 = avctx->priv_data; - MpegEncContext *s = &s1->mpeg_enc_ctx; - - int drop_frame_flag; - int time_code_hours, time_code_minutes; - int time_code_seconds, time_code_pictures; - int broken_link; - - init_get_bits(&s->gb, buf, buf_size*8); - - drop_frame_flag = get_bits1(&s->gb); - - time_code_hours=get_bits(&s->gb,5); - time_code_minutes = get_bits(&s->gb,6); - skip_bits1(&s->gb);//marker bit - time_code_seconds = get_bits(&s->gb,6); - time_code_pictures = get_bits(&s->gb,6); - - /*broken_link indicate that after editing the - reference frames of the first B-Frames after GOP I-Frame - are missing (open gop)*/ - broken_link = get_bits1(&s->gb); - - if(s->avctx->debug & FF_DEBUG_PICT_INFO) - av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) broken_link=%d\n", - time_code_hours, time_code_minutes, time_code_seconds, - time_code_pictures, broken_link); -} -/** - * finds the end of the current frame in the bitstream. - * @return the position of the first byte of the next frame, or -1 - */ -static int mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size) -{ - int i; - uint32_t state= pc->state; - - i=0; - if(!pc->frame_start_found){ - for(i=0; i<buf_size; i++){ - i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1; - if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){ - i++; - pc->frame_start_found=1; - break; - } - } - } - - if(pc->frame_start_found){ - /* EOF considered as end of frame */ - if (buf_size == 0) - return 0; - for(; i<buf_size; i++){ - i= ff_find_start_code(buf+i, buf+buf_size, &state) - buf - 1; - if((state&0xFFFFFF00) == 0x100){ - if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){ - pc->frame_start_found=0; - pc->state=-1; - return i-3; - } - } - } - } - pc->state= state; - return END_NOT_FOUND; -} - -/* handle buffering and image synchronisation */ -static int mpeg_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) -{ - Mpeg1Context *s = avctx->priv_data; - const uint8_t *buf_end; - const uint8_t *buf_ptr; - uint32_t start_code; - int ret, input_size; - AVFrame *picture = data; - MpegEncContext *s2 = &s->mpeg_enc_ctx; - dprintf("fill_buffer\n"); - - if (buf_size == 0) { - /* special case for last picture */ - if (s2->low_delay==0 && s2->next_picture_ptr) { - *picture= *(AVFrame*)s2->next_picture_ptr; - s2->next_picture_ptr= NULL; - - *data_size = sizeof(AVFrame); - } - return 0; - } - - if(s2->flags&CODEC_FLAG_TRUNCATED){ - int next= mpeg1_find_frame_end(&s2->parse_context, buf, buf_size); - - if( ff_combine_frame(&s2->parse_context, next, &buf, &buf_size) < 0 ) - return buf_size; - } - - buf_ptr = buf; - buf_end = buf + buf_size; - -#if 0 - if (s->repeat_field % 2 == 1) { - s->repeat_field++; - //fprintf(stderr,"\nRepeating last frame: %d -> %d! pict: %d %d", avctx->frame_number-1, avctx->frame_number, - // s2->picture_number, s->repeat_field); - if (avctx->flags & CODEC_FLAG_REPEAT_FIELD) { - *data_size = sizeof(AVPicture); - goto the_end; - } - } -#endif - - if(s->mpeg_enc_ctx_allocated==0 && avctx->codec_tag == ff_get_fourcc("VCR2")) - vcr2_init_sequence(avctx); - - s->slice_count= 0; - - for(;;) { - /* find start next code */ - start_code = -1; - buf_ptr = ff_find_start_code(buf_ptr,buf_end, &start_code); - if (start_code > 0x1ff){ - if(s2->pict_type != B_TYPE || avctx->skip_frame <= AVDISCARD_DEFAULT){ - if(avctx->thread_count > 1){ - int i; - - avctx->execute(avctx, slice_decode_thread, (void**)&(s2->thread_context[0]), NULL, s->slice_count); - for(i=0; i<s->slice_count; i++) - s2->error_count += s2->thread_context[i]->error_count; - } - if (slice_end(avctx, picture)) { - if(s2->last_picture_ptr || s2->low_delay) //FIXME merge with the stuff in mpeg_decode_slice - *data_size = sizeof(AVPicture); - } - } - return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index); - } - - input_size = buf_end - buf_ptr; - - if(avctx->debug & FF_DEBUG_STARTCODE){ - av_log(avctx, AV_LOG_DEBUG, "%3X at %zd left %d\n", start_code, buf_ptr-buf, input_size); - } - - /* prepare data for next start code */ - switch(start_code) { - case SEQ_START_CODE: - mpeg1_decode_sequence(avctx, buf_ptr, - input_size); - break; - - case PICTURE_START_CODE: - /* we have a complete image : we try to decompress it */ - mpeg1_decode_picture(avctx, - buf_ptr, input_size); - break; - case EXT_START_CODE: - mpeg_decode_extension(avctx, - buf_ptr, input_size); - break; - case USER_START_CODE: - mpeg_decode_user_data(avctx, - buf_ptr, input_size); - break; - case GOP_START_CODE: - s2->first_field=0; - mpeg_decode_gop(avctx, - buf_ptr, input_size); - break; - default: - if (start_code >= SLICE_MIN_START_CODE && - start_code <= SLICE_MAX_START_CODE) { - int mb_y= start_code - SLICE_MIN_START_CODE; - - if(s2->last_picture_ptr==NULL){ - /* skip b frames if we dont have reference frames */ - if(s2->pict_type==B_TYPE) break; - /* skip P frames if we dont have reference frame no valid header */ -// if(s2->pict_type==P_TYPE && s2->first_field && !s2->first_slice) break; - } - /* skip b frames if we are in a hurry */ - if(avctx->hurry_up && s2->pict_type==B_TYPE) break; - if( (avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type==B_TYPE) - ||(avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type!=I_TYPE) - || avctx->skip_frame >= AVDISCARD_ALL) - break; - /* skip everything if we are in a hurry>=5 */ - if(avctx->hurry_up>=5) break; - - if (!s->mpeg_enc_ctx_allocated) break; - - if(s2->codec_id == CODEC_ID_MPEG2VIDEO){ - if(mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom) - break; - } - - if(s2->first_slice){ - s2->first_slice=0; - if(mpeg_field_start(s2) < 0) - return -1; - } - if(!s2->current_picture_ptr){ - av_log(avctx, AV_LOG_ERROR, "current_picture not initalized\n"); - return -1; - } - - if(avctx->thread_count > 1){ - int threshold= (s2->mb_height*s->slice_count + avctx->thread_count/2) / avctx->thread_count; - if(threshold <= mb_y){ - MpegEncContext *thread_context= s2->thread_context[s->slice_count]; - - thread_context->start_mb_y= mb_y; - thread_context->end_mb_y = s2->mb_height; - if(s->slice_count){ - s2->thread_context[s->slice_count-1]->end_mb_y= mb_y; - ff_update_duplicate_context(thread_context, s2); - } - init_get_bits(&thread_context->gb, buf_ptr, input_size*8); - s->slice_count++; - } - buf_ptr += 2; //FIXME add minimum num of bytes per slice - }else{ - ret = mpeg_decode_slice(s, mb_y, &buf_ptr, input_size); - emms_c(); - - if(ret < 0){ - if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0) - ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, AC_ERROR|DC_ERROR|MV_ERROR); - }else{ - ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, AC_END|DC_END|MV_END); - } - } - } - break; - } - } -} - -static int mpeg_decode_end(AVCodecContext *avctx) -{ - Mpeg1Context *s = avctx->priv_data; - - if (s->mpeg_enc_ctx_allocated) - MPV_common_end(&s->mpeg_enc_ctx); - return 0; -} - -AVCodec mpeg1video_decoder = { - "mpeg1video", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG1VIDEO, - sizeof(Mpeg1Context), - mpeg_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY, - .flush= ff_mpeg_flush, -}; - -AVCodec mpeg2video_decoder = { - "mpeg2video", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG2VIDEO, - sizeof(Mpeg1Context), - mpeg_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY, - .flush= ff_mpeg_flush, -}; - -//legacy decoder -AVCodec mpegvideo_decoder = { - "mpegvideo", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG2VIDEO, - sizeof(Mpeg1Context), - mpeg_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY, - .flush= ff_mpeg_flush, -}; - -#ifdef CONFIG_ENCODERS - -AVCodec mpeg1video_encoder = { - "mpeg1video", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG1VIDEO, - sizeof(MpegEncContext), - encode_init, - MPV_encode_picture, - MPV_encode_end, - .supported_framerates= ff_frame_rate_tab+1, - .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1}, - .capabilities= CODEC_CAP_DELAY, -}; - -AVCodec mpeg2video_encoder = { - "mpeg2video", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG2VIDEO, - sizeof(MpegEncContext), - encode_init, - MPV_encode_picture, - MPV_encode_end, - .supported_framerates= ff_frame_rate_tab+1, - .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, -1}, - .capabilities= CODEC_CAP_DELAY, -}; -#endif - -#ifdef HAVE_XVMC -static int mpeg_mc_decode_init(AVCodecContext *avctx){ - Mpeg1Context *s; - - if( avctx->thread_count > 1) - return -1; - if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) ) - return -1; - if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){ - dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n"); - } - mpeg_decode_init(avctx); - s = avctx->priv_data; - - avctx->pix_fmt = PIX_FMT_XVMC_MPEG2_IDCT; - avctx->xvmc_acceleration = 2;//2 - the blocks are packed! - - return 0; -} - -AVCodec mpeg_xvmc_decoder = { - "mpegvideo_xvmc", - CODEC_TYPE_VIDEO, - CODEC_ID_MPEG2VIDEO_XVMC, - sizeof(Mpeg1Context), - mpeg_mc_decode_init, - NULL, - mpeg_decode_end, - mpeg_decode_frame, - CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED| CODEC_CAP_HWACCEL | CODEC_CAP_DELAY, - .flush= ff_mpeg_flush, -}; - -#endif - -#ifdef CONFIG_MPEGVIDEO_PARSER -static void mpegvideo_extract_headers(AVCodecParserContext *s, - AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - ParseContext1 *pc = s->priv_data; - const uint8_t *buf_end; - uint32_t start_code; - int frame_rate_index, ext_type, bytes_left; - int frame_rate_ext_n, frame_rate_ext_d; - int picture_structure, top_field_first, repeat_first_field, progressive_frame; - int horiz_size_ext, vert_size_ext, bit_rate_ext; -//FIXME replace the crap with get_bits() - s->repeat_pict = 0; - buf_end = buf + buf_size; - while (buf < buf_end) { - start_code= -1; - buf= ff_find_start_code(buf, buf_end, &start_code); - bytes_left = buf_end - buf; - switch(start_code) { - case PICTURE_START_CODE: - if (bytes_left >= 2) { - s->pict_type = (buf[1] >> 3) & 7; - } - break; - case SEQ_START_CODE: - if (bytes_left >= 7) { - pc->width = (buf[0] << 4) | (buf[1] >> 4); - pc->height = ((buf[1] & 0x0f) << 8) | buf[2]; - avcodec_set_dimensions(avctx, pc->width, pc->height); - frame_rate_index = buf[3] & 0xf; - pc->frame_rate.den = avctx->time_base.den = ff_frame_rate_tab[frame_rate_index].num; - pc->frame_rate.num = avctx->time_base.num = ff_frame_rate_tab[frame_rate_index].den; - avctx->bit_rate = ((buf[4]<<10) | (buf[5]<<2) | (buf[6]>>6))*400; - avctx->codec_id = CODEC_ID_MPEG1VIDEO; - avctx->sub_id = 1; - } - break; - case EXT_START_CODE: - if (bytes_left >= 1) { - ext_type = (buf[0] >> 4); - switch(ext_type) { - case 0x1: /* sequence extension */ - if (bytes_left >= 6) { - horiz_size_ext = ((buf[1] & 1) << 1) | (buf[2] >> 7); - vert_size_ext = (buf[2] >> 5) & 3; - bit_rate_ext = ((buf[2] & 0x1F)<<7) | (buf[3]>>1); - frame_rate_ext_n = (buf[5] >> 5) & 3; - frame_rate_ext_d = (buf[5] & 0x1f); - pc->progressive_sequence = buf[1] & (1 << 3); - avctx->has_b_frames= !(buf[5] >> 7); - - pc->width |=(horiz_size_ext << 12); - pc->height |=( vert_size_ext << 12); - avctx->bit_rate += (bit_rate_ext << 18) * 400; - avcodec_set_dimensions(avctx, pc->width, pc->height); - avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1); - avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1); - avctx->codec_id = CODEC_ID_MPEG2VIDEO; - avctx->sub_id = 2; /* forces MPEG2 */ - } - break; - case 0x8: /* picture coding extension */ - if (bytes_left >= 5) { - picture_structure = buf[2]&3; - top_field_first = buf[3] & (1 << 7); - repeat_first_field = buf[3] & (1 << 1); - progressive_frame = buf[4] & (1 << 7); - - /* check if we must repeat the frame */ - if (repeat_first_field) { - if (pc->progressive_sequence) { - if (top_field_first) - s->repeat_pict = 4; - else - s->repeat_pict = 2; - } else if (progressive_frame) { - s->repeat_pict = 1; - } - } - - /* the packet only represents half a frame - XXX,FIXME maybe find a different solution */ - if(picture_structure != 3) - s->repeat_pict = -1; - } - break; - } - } - break; - case -1: - goto the_end; - default: - /* we stop parsing when we encounter a slice. It ensures - that this function takes a negligible amount of time */ - if (start_code >= SLICE_MIN_START_CODE && - start_code <= SLICE_MAX_START_CODE) - goto the_end; - break; - } - } - the_end: ; -} - -static int mpegvideo_parse(AVCodecParserContext *s, - AVCodecContext *avctx, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size) -{ - ParseContext1 *pc1 = s->priv_data; - ParseContext *pc= &pc1->pc; - int next; - - if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){ - next= buf_size; - }else{ - next= mpeg1_find_frame_end(pc, buf, buf_size); - - if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) { - *poutbuf = NULL; - *poutbuf_size = 0; - return buf_size; - } - - } - /* we have a full frame : we just parse the first few MPEG headers - to have the full timing information. The time take by this - function should be negligible for uncorrupted streams */ - mpegvideo_extract_headers(s, avctx, buf, buf_size); -#if 0 - printf("pict_type=%d frame_rate=%0.3f repeat_pict=%d\n", - s->pict_type, (double)avctx->time_base.den / avctx->time_base.num, s->repeat_pict); -#endif - - *poutbuf = (uint8_t *)buf; - *poutbuf_size = buf_size; - return next; -} - -static int mpegvideo_split(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - int i; - uint32_t state= -1; - - for(i=0; i<buf_size; i++){ - state= (state<<8) | buf[i]; - if(state != 0x1B3 && state != 0x1B5 && state < 0x200 && state >= 0x100) - return i-3; - } - return 0; -} - -AVCodecParser mpegvideo_parser = { - { CODEC_ID_MPEG1VIDEO, CODEC_ID_MPEG2VIDEO }, - sizeof(ParseContext1), - NULL, - mpegvideo_parse, - ff_parse1_close, - mpegvideo_split, -}; -#endif /* !CONFIG_MPEGVIDEO_PARSER */ - -/* this is ugly i know, but the alternative is too make - hundreds of vars global and prefix them with ff_mpeg1_ - which is far uglier. */ -#include "mdec.c" |