diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/mpeg12.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/mpeg12.c | 3557 |
1 files changed, 3557 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/mpeg12.c b/contrib/ffmpeg/libavcodec/mpeg12.c new file mode 100644 index 000000000..c0fa7e4bc --- /dev/null +++ b/contrib/ffmpeg/libavcodec/mpeg12.c @@ -0,0 +1,3557 @@ +/* + * 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" +#include "bytestream.h" + +//#undef NDEBUG +//#include <assert.h> + + +/* 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_FCODE+1][MAX_MV*2+1]; +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 uint8_t static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; + +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){ + if(avctx->level != FF_LEVEL_UNKNOWN){ + av_log(avctx, AV_LOG_ERROR, "Set profile and level\n"); + return -1; + } + avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */ + } + + if(avctx->level == FF_LEVEL_UNKNOWN){ + if(avctx->profile == 0){ /* 4:2:2 */ + if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */ + else avctx->level = 2; /* High */ + }else{ + if(avctx->profile != 1 && s->chroma_format != CHROMA_420){ + av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n"); + return -1; + } + if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */ + else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */ + else avctx->level = 4; /* High */ + } + } + + 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->avctx->profile == 0); //escx 1 for 4:2:2 profile */ + + 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->flags2 & 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 + +static av_always_inline void put_qscale(MpegEncContext *s) +{ + if(s->q_scale_type){ + assert(s->qscale>=1 && s->qscale <=12); + put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]); + }else{ + put_bits(&s->pb, 5, s->qscale); + } +} + +void ff_mpeg1_encode_slice_header(MpegEncContext *s){ + put_header(s, SLICE_MIN_START_CODE + s->mb_y); + put_qscale(s); + 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_qscale(s); + }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_qscale(s); + }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_qscale(s); + }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_qscale(s); + }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_qscale(s); + }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_qscale(s); + } 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_qscale(s); + } 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, static_rl_table_store[0]); + init_rl(&rl_mpeg2, static_rl_table_store[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); + } + + 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(s->avctx, "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, static_rl_table_store[0]); + init_rl(&rl_mpeg2, static_rl_table_store[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(s->avctx, "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(s->avctx, "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(s->avctx, "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(s->avctx, "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(s->avctx, "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(s->avctx, "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(s->avctx, "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(s->avctx, "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(s->avctx, "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(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision); + dprintf(s->avctx, "picture_structure=%d\n", s->picture_structure); + dprintf(s->avctx, "top field first=%d\n", s->top_field_first); + dprintf(s->avctx, "repeat first field=%d\n", s->repeat_first_field); + dprintf(s->avctx, "conceal=%d\n", s->concealment_motion_vectors); + dprintf(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format); + dprintf(s->avctx, "alternate_scan=%d\n", s->alternate_scan); + dprintf(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct); + dprintf(s->avctx, "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; + } + } + if(s->mb_x >= (unsigned)s->mb_width){ + av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n"); + return -1; + } + + 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(s->avctx, "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(s->avctx, "intra matrix present\n"); + for(i=0;i<64;i++) + dprintf(s->avctx, " %d", s->intra_matrix[s->dsp.idct_permutation[i]]); + dprintf(s->avctx, "\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(s->avctx, "non intra matrix present\n"); + for(i=0;i<64;i++) + dprintf(s->avctx, " %d", s->inter_matrix[s->dsp.idct_permutation[i]]); + dprintf(s->avctx, "\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(avctx, "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(avctx, "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 */ + +static int imx_dump_header(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, + uint8_t **poutbuf, int *poutbuf_size, + const uint8_t *buf, int buf_size, int keyframe) +{ + /* MXF essence element key */ + static const uint8_t imx_header[16] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01,0x05,0x01,0x01,0x00 }; + uint8_t *poutbufp; + + if (avctx->codec_id != CODEC_ID_MPEG2VIDEO) { + av_log(avctx, AV_LOG_ERROR, "imx bitstream filter only applies to mpeg2video codec\n"); + return 0; + } + + *poutbuf = av_malloc(buf_size + 20 + FF_INPUT_BUFFER_PADDING_SIZE); + poutbufp = *poutbuf; + bytestream_put_buffer(&poutbufp, imx_header, 16); + bytestream_put_byte(&poutbufp, 0x83); /* KLV BER long form */ + bytestream_put_be24(&poutbufp, buf_size); + bytestream_put_buffer(&poutbufp, buf, buf_size); + *poutbuf_size = poutbufp - *poutbuf; + return 1; +} + +AVBitStreamFilter imx_dump_header_bsf = { + "imxdump", + 0, + imx_dump_header, +}; + +/* 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" |