From aa02812764f10d9788e055b45654c21c7fbde63b Mon Sep 17 00:00:00 2001 From: Bastien Nocera Date: Wed, 1 Sep 2004 11:59:42 +0000 Subject: - fix the gcc 3.4 errors with inline functions by moving the functions around sorry, unimplemented: inlining failed in call to 'XXX': function body not available CVS patchset: 6924 CVS date: 2004/09/01 11:59:42 --- src/libffmpeg/libavcodec/mpeg12.c | 1314 ++++++++++++++++++------------------- 1 file changed, 651 insertions(+), 663 deletions(-) (limited to 'src/libffmpeg/libavcodec/mpeg12.c') diff --git a/src/libffmpeg/libavcodec/mpeg12.c b/src/libffmpeg/libavcodec/mpeg12.c index 9e57398ef..872c39c0c 100644 --- a/src/libffmpeg/libavcodec/mpeg12.c +++ b/src/libffmpeg/libavcodec/mpeg12.c @@ -65,18 +65,6 @@ static void mpeg1_encode_block(MpegEncContext *s, 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 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 int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred); static void exchange_uv(MpegEncContext *s); @@ -1035,224 +1023,555 @@ static inline int get_qscale(MpegEncContext *s) } } -/* motion type (for mpeg2) */ -#define MT_FIELD 1 -#define MT_FRAME 2 -#define MT_16X8 2 -#define MT_DMV 3 +static inline int decode_dc(GetBitContext *gb, int component) +{ + int code, diff; -static int mpeg_decode_mb(MpegEncContext *s, - DCTELEM block[12][64]) + 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 i, j, k, cbp, val, mb_type, motion_type; - - dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y); + 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; - assert(s->mb_skiped==0); + /* DC coef */ + component = (n <= 3 ? 0 : n - 4 + 1); + diff = decode_dc(&s->gb, component); + if (diff >= 0xffff) + return -1; + dc = s->last_dc[component]; + dc += diff; + s->last_dc[component] = dc; + block[0] = dc<<3; + dprintf("dc=%d diff=%d\n", dc, diff); + i = 0; + { + OPEN_READER(re, &s->gb); + /* now quantify & encode AC coefs */ + for(;;) { + UPDATE_CACHE(re, &s->gb); + GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2); + + 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; + } - if (s->mb_skip_run-- != 0) { - if(s->pict_type == I_TYPE){ - av_log(s->avctx, AV_LOG_ERROR, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y); - return -1; + block[j] = level; } - - /* 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_skiped = 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 { - /* 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]; + CLOSE_READER(re, &s->gb); + } + s->block_last_index[n] = i; + return 0; +} - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= - s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | 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)); +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; - if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0) - s->mb_skiped = 1; + { + int v; + 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); + v= SHOW_UBITS(re, &s->gb, 2); + if (v & 2) { + LAST_SKIP_BITS(re, &s->gb, 2); + level= (3*qscale*quant_matrix[0])>>5; + level= (level-1)|1; + if(v&1) + level= -level; + block[0] = level; + i++; } - 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); + /* 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); + + if(level == 127){ + break; + } else 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); + 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*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; } - 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; + + block[j] = level; } - mb_type = btype2mb_type[ mb_type ]; - break; + CLOSE_READER(re, &s->gb); } - dprintf("mb_type=%x\n", mb_type); -// motion_type = 0; /* avoid warning */ - if (IS_INTRA(mb_type)) { - /* 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]); + s->block_last_index[n] = i; + return 0; +} - 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); - } +/* Also does unquantization here, since I will never support mpeg2 + encoding */ +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; + + { + int v; + 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); + v= SHOW_UBITS(re, &s->gb, 2); + if (v & 2) { + LAST_SKIP_BITS(re, &s->gb, 2); + level= (3*qscale*quant_matrix[0])>>5; + if(v&1) + level= -level; + block[0] = level; + mismatch ^= level; + i++; } -#endif - if (s->codec_id == CODEC_ID_MPEG2VIDEO) { - for(i=0;i<4+(1<chroma_format);i++) { - if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0) - return -1; + /* 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); + + if(level == 127){ + break; + } else 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); + 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*2+1)*qscale*quant_matrix[j])>>5; + level= -level; + }else{ + level= ((level*2+1)*qscale*quant_matrix[j])>>5; + } } - } else { - for(i=0;i<6;i++) { - if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0) - return -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; } + + mismatch ^= level; + block[j] = level; } - } else { - if (mb_type & MB_TYPE_ZERO_MV){ - assert(mb_type & MB_TYPE_CBP); + CLOSE_READER(re, &s->gb); + } + block[63] ^= (mismatch & 1); + + s->block_last_index[n] = i; + return 0; +} - /* 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); - } +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; - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); + /* DC coef */ + if (n < 4){ + quant_matrix = s->intra_matrix; + component = 0; + }else{ + quant_matrix = s->chroma_intra_matrix; + component = (n&1) + 1; + } + diff = decode_dc(&s->gb, component); + if (diff >= 0xffff) + return -1; + dc = s->last_dc[component]; + dc += diff; + s->last_dc[component] = dc; + block[0] = dc << (3 - s->intra_dc_precision); + dprintf("dc=%d\n", block[0]); + mismatch = block[0] ^ 1; + i = 0; + if (s->intra_vlc_format) + rl = &rl_mpeg2; + else + rl = &rl_mpeg1; - 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; + { + 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); + + 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; + } } - 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); + 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; +} - /* 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); - } +/* motion type (for mpeg2) */ +#define MT_FIELD 1 +#define MT_FRAME 2 +#define MT_16X8 2 +#define MT_DMV 3 - if (IS_QUANT(mb_type)) - s->qscale = get_qscale(s); +static int mpeg_decode_mb(MpegEncContext *s, + DCTELEM block[12][64]) +{ + int i, j, k, cbp, val, mb_type, motion_type; + + dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y); - /* motion vectors */ - s->mv_dir = 0; - for(i=0;i<2;i++) { - if (USES_LIST(mb_type, i)) { - s->mv_dir |= (MV_DIR_FORWARD >> i); - dprintf("motion_type=%d\n", motion_type); - switch(motion_type) { - case MT_FRAME: /* or MT_16X8 */ - if (s->picture_structure == PICT_FRAME) { - /* MT_FRAME */ - mb_type |= MB_TYPE_16x16; - s->mv_type = MV_TYPE_16X16; - s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] = - mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]); - s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] = - mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]); - /* full_pel: only for mpeg1 */ - if (s->full_pel[i]){ - s->mv[i][0][0] <<= 1; - s->mv[i][0][1] <<= 1; - } - } else { - /* MT_16X8 */ - mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; - s->mv_type = MV_TYPE_16X8; - for(j=0;j<2;j++) { - s->field_select[i][j] = get_bits1(&s->gb); - for(k=0;k<2;k++) { - val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], - s->last_mv[i][j][k]); - s->last_mv[i][j][k] = val; - s->mv[i][j][k] = val; - } - } - } - break; - case MT_FIELD: - s->mv_type = MV_TYPE_FIELD; - if (s->picture_structure == PICT_FRAME) { + assert(s->mb_skiped==0); + + if (s->mb_skip_run-- != 0) { + if(s->pict_type == I_TYPE){ + av_log(s->avctx, AV_LOG_ERROR, "skiped 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_skiped = 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 { + /* 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 ]= + s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | 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_skiped = 1; + } + + return 0; + } + + switch(s->pict_type) { + default: + case I_TYPE: + if (get_bits1(&s->gb) == 0) { + if (get_bits1(&s->gb) == 0){ + av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in I Frame at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA; + } else { + mb_type = MB_TYPE_INTRA; + } + break; + case P_TYPE: + mb_type = get_vlc2(&s->gb, mb_ptype_vlc.table, MB_PTYPE_VLC_BITS, 1); + if (mb_type < 0){ + av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + mb_type = ptype2mb_type[ mb_type ]; + break; + case B_TYPE: + mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1); + if (mb_type < 0){ + av_log(s->avctx, AV_LOG_ERROR, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y); + return -1; + } + mb_type = btype2mb_type[ mb_type ]; + break; + } + dprintf("mb_type=%x\n", mb_type); +// motion_type = 0; /* avoid warning */ + if (IS_INTRA(mb_type)) { + /* 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) { + for(i=0;i<4+(1<chroma_format);i++) { + if (mpeg2_decode_block_intra(s, s->pblocks[i], i) < 0) + return -1; + } + } else { + for(i=0;i<6;i++) { + if (mpeg1_decode_block_intra(s, s->pblocks[i], i) < 0) + return -1; + } + } + } else { + if (mb_type & MB_TYPE_ZERO_MV){ + assert(mb_type & MB_TYPE_CBP); + + /* compute dct type */ + if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var? + !s->frame_pred_frame_dct) { + s->interlaced_dct = get_bits1(&s->gb); + } + + if (IS_QUANT(mb_type)) + s->qscale = get_qscale(s); + + s->mv_dir = MV_DIR_FORWARD; + if(s->picture_structure == PICT_FRAME) + s->mv_type = MV_TYPE_16X16; + else{ + s->mv_type = MV_TYPE_FIELD; + mb_type |= MB_TYPE_INTERLACED; + s->field_select[0][0]= s->picture_structure - 1; + } + s->last_mv[0][0][0] = 0; + s->last_mv[0][0][1] = 0; + s->last_mv[0][1][0] = 0; + s->last_mv[0][1][1] = 0; + s->mv[0][0][0] = 0; + s->mv[0][0][1] = 0; + }else{ + assert(mb_type & MB_TYPE_L0L1); +//FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED + /* get additionnal motion vector type */ + if (s->frame_pred_frame_dct) + motion_type = MT_FRAME; + else{ + motion_type = get_bits(&s->gb, 2); + } + + /* compute dct type */ + if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var? + !s->frame_pred_frame_dct && HAS_CBP(mb_type)) { + s->interlaced_dct = get_bits1(&s->gb); + } + + if (IS_QUANT(mb_type)) + s->qscale = get_qscale(s); + + /* motion vectors */ + s->mv_dir = 0; + for(i=0;i<2;i++) { + if (USES_LIST(mb_type, i)) { + s->mv_dir |= (MV_DIR_FORWARD >> i); + dprintf("motion_type=%d\n", motion_type); + switch(motion_type) { + case MT_FRAME: /* or MT_16X8 */ + if (s->picture_structure == PICT_FRAME) { + /* MT_FRAME */ + mb_type |= MB_TYPE_16x16; + s->mv_type = MV_TYPE_16X16; + s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] = + mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]); + s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] = + mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]); + /* full_pel: only for mpeg1 */ + if (s->full_pel[i]){ + s->mv[i][0][0] <<= 1; + s->mv[i][0][1] <<= 1; + } + } else { + /* MT_16X8 */ + mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; + s->mv_type = MV_TYPE_16X8; + for(j=0;j<2;j++) { + s->field_select[i][j] = get_bits1(&s->gb); + for(k=0;k<2;k++) { + val = mpeg_decode_motion(s, s->mpeg_f_code[i][k], + s->last_mv[i][j][k]); + s->last_mv[i][j][k] = val; + s->mv[i][j][k] = val; + } + } + } + break; + case MT_FIELD: + s->mv_type = MV_TYPE_FIELD; + if (s->picture_structure == PICT_FRAME) { mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; for(j=0;j<2;j++) { s->field_select[i][j] = get_bits1(&s->gb); @@ -1291,486 +1610,155 @@ static int mpeg_decode_mb(MpegEncContext *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)) { - 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(s->chroma_format == 2){//CHROMA422 - cbp|= ( get_bits(&s->gb,2) ) << 6; - }else - if(s->chroma_format > 2){//CHROMA444 - cbp|= ( get_bits(&s->gb,6) ) << 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) { - for(i=0;i<6;i++) { - if (cbp & (1<<(5-i)) ) { - if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - } - if (s->chroma_format >= 2) { - if (s->chroma_format == 2) {//CHROMA_422) - for(i=6;i<8;i++) { - if (cbp & (1<<(6+7-i)) ) { - if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - } - }else{ /*CHROMA_444*/ - for(i=6;i<12;i++) { - if (cbp & (1<<(6+11-i)) ) { - if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0) - return -1; - } else { - s->block_last_index[i] = -1; - } - } - } - } - } 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<6;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 = 1 << (shift+4); - val = ((val + l)&(l*2-1)) - l; - return val; -} - -static inline int decode_dc(GetBitContext *gb, int component) -{ - int code, diff; - - if (component == 0) { - code = get_vlc2(gb, dc_lum_vlc.table, DC_VLC_BITS, 2); - } else { - code = get_vlc2(gb, dc_chroma_vlc.table, DC_VLC_BITS, 2); - } - if (code < 0){ - av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n"); - return 0xffff; - } - if (code == 0) { - diff = 0; - } else { - diff = get_xbits(gb, code); - } - return diff; -} - -static inline int mpeg1_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n) -{ - int level, dc, diff, i, j, run; - int component; - RLTable *rl = &rl_mpeg1; - uint8_t * const scantable= s->intra_scantable.permutated; - const uint16_t *quant_matrix= s->intra_matrix; - const int qscale= s->qscale; - - /* DC coef */ - component = (n <= 3 ? 0 : n - 4 + 1); - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc<<3; - dprintf("dc=%d diff=%d\n", dc, diff); - i = 0; - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefs */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2); - - 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; - - { - int v; - 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); - v= SHOW_UBITS(re, &s->gb, 2); - if (v & 2) { - LAST_SKIP_BITS(re, &s->gb, 2); - level= (3*qscale*quant_matrix[0])>>5; - level= (level-1)|1; - if(v&1) - level= -level; - block[0] = level; - i++; - } - - /* 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); - - if(level == 127){ - break; - } else 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); - 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*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; - } - CLOSE_READER(re, &s->gb); - } - s->block_last_index[n] = i; - return 0; -} - -/* Also does unquantization here, since I will never support mpeg2 - encoding */ -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; + s->mv_type = MV_TYPE_DMV; - mismatch = 1; - { - int v; - OPEN_READER(re, &s->gb); - i = -1; - if (n < 4) - quant_matrix = s->inter_matrix; - else - quant_matrix = s->chroma_inter_matrix; + s->last_mv[i][0][1] = my<<1; + s->last_mv[i][1][1] = my<<1; - /* special case for the first coef. no need to add a second vlc table */ - UPDATE_CACHE(re, &s->gb); - v= SHOW_UBITS(re, &s->gb, 2); - if (v & 2) { - LAST_SKIP_BITS(re, &s->gb, 2); - level= (3*qscale*quant_matrix[0])>>5; - if(v&1) - level= -level; - block[0] = level; - mismatch ^= level; - i++; - } + 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 - /* 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); - - if(level == 127){ - break; - } else 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); - 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); + if (s->picture_structure == PICT_FRAME) { + mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED; - 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; + //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; + } } } - if (i > 63){ - av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); + } + + s->mb_intra = 0; + + if (HAS_CBP(mb_type)) { + 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; } - - mismatch ^= level; - block[j] = level; + if(s->chroma_format == 2){//CHROMA422 + cbp|= ( get_bits(&s->gb,2) ) << 6; + }else + if(s->chroma_format > 2){//CHROMA444 + cbp|= ( get_bits(&s->gb,6) ) << 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) { + for(i=0;i<6;i++) { + if (cbp & (1<<(5-i)) ) { + if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0) + return -1; + } else { + s->block_last_index[i] = -1; + } + } + if (s->chroma_format >= 2) { + if (s->chroma_format == 2) {//CHROMA_422) + for(i=6;i<8;i++) { + if (cbp & (1<<(6+7-i)) ) { + if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0) + return -1; + } else { + s->block_last_index[i] = -1; + } + } + }else{ /*CHROMA_444*/ + for(i=6;i<12;i++) { + if (cbp & (1<<(6+11-i)) ) { + if (mpeg2_decode_block_non_intra(s, s->pblocks[i], i) < 0) + return -1; + } else { + s->block_last_index[i] = -1; + } + } + } + } + } 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<6;i++) + s->block_last_index[i] = -1; } - CLOSE_READER(re, &s->gb); } - block[63] ^= (mismatch & 1); - - s->block_last_index[n] = i; + + s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type; + return 0; } -static inline int mpeg2_decode_block_intra(MpegEncContext *s, - DCTELEM *block, - int n) +/* as h263, but only 17 codes */ +static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred) { - 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; + int code, sign, val, l, shift; - /* DC coef */ - if (n < 4){ - quant_matrix = s->intra_matrix; - component = 0; - }else{ - quant_matrix = s->chroma_intra_matrix; - component = (n&1) + 1; + code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2); + if (code == 0) { + return pred; + } + if (code < 0) { + return 0xffff; } - diff = decode_dc(&s->gb, component); - if (diff >= 0xffff) - return -1; - dc = s->last_dc[component]; - dc += diff; - s->last_dc[component] = dc; - block[0] = dc << (3 - s->intra_dc_precision); - dprintf("dc=%d\n", block[0]); - mismatch = block[0] ^ 1; - i = 0; - if (s->intra_vlc_format) - rl = &rl_mpeg2; - else - rl = &rl_mpeg1; - { - OPEN_READER(re, &s->gb); - /* now quantify & encode AC coefs */ - for(;;) { - UPDATE_CACHE(re, &s->gb); - GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2); - - 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); + sign = get_bits1(&s->gb); + shift = fcode - 1; + val = code; + if (shift) { + val = (val - 1) << shift; + val |= get_bits(&s->gb, shift); + val++; } - block[63]^= mismatch&1; + if (sign) + val = -val; + val += pred; - s->block_last_index[n] = i; - return 0; + /* modulo decoding */ + l = 1 << (shift+4); + val = ((val + l)&(l*2-1)) - l; + return val; } typedef struct Mpeg1Context { -- cgit v1.2.3