diff options
Diffstat (limited to 'libavcodec/h263.c')
| -rw-r--r-- | libavcodec/h263.c | 137 |
1 files changed, 114 insertions, 23 deletions
diff --git a/libavcodec/h263.c b/libavcodec/h263.c index fb6b2e7650..e6ac807897 100644 --- a/libavcodec/h263.c +++ b/libavcodec/h263.c @@ -1508,8 +1508,8 @@ int mpeg4_decode_picture_header(MpegEncContext * s) if (state == 0) return -1; } - - if (startcode == 0x120) { +//printf("startcode %X %d\n", startcode, get_bits_count(&s->gb)); + if (startcode == 0x120) { // Video Object Layer int time_increment_resolution, width, height, vo_ver_id; /* vol header */ @@ -1522,9 +1522,21 @@ int mpeg4_decode_picture_header(MpegEncContext * s) vo_ver_id = 1; } - skip_bits(&s->gb, 4); /* aspect_ratio_info */ - skip_bits1(&s->gb); /* vol control parameter */ + s->aspect_ratio_info= get_bits(&s->gb, 4); + if(s->aspect_ratio_info == EXTENDET_PAR){ + skip_bits(&s->gb, 8); //par_width + skip_bits(&s->gb, 8); // par_height + } + if(get_bits1(&s->gb)){ /* vol control parameter */ + printf("vol control parameter not supported\n"); + return -1; + } s->shape = get_bits(&s->gb, 2); /* vol shape */ + if(s->shape == GRAY_SHAPE && vo_ver_id != 1){ + printf("Gray shape not supported\n"); + skip_bits(&s->gb, 4); //video_object_layer_shape_extension + } + skip_bits1(&s->gb); /* marker */ time_increment_resolution = get_bits(&s->gb, 16); @@ -1537,8 +1549,8 @@ int mpeg4_decode_picture_header(MpegEncContext * s) skip_bits(&s->gb, s->time_increment_bits); } - if (s->shape != 2) { - if (s->shape == 0) { + if (s->shape != BIN_ONLY_SHAPE) { + if (s->shape == RECT_SHAPE) { skip_bits1(&s->gb); /* marker */ width = get_bits(&s->gb, 13); skip_bits1(&s->gb); /* marker */ @@ -1547,12 +1559,31 @@ int mpeg4_decode_picture_header(MpegEncContext * s) } skip_bits1(&s->gb); /* interlaced */ - skip_bits1(&s->gb); /* OBMC */ + skip_bits1(&s->gb); /* OBMC Disable */ if (vo_ver_id == 1) { s->vol_sprite_usage = get_bits1(&s->gb); /* vol_sprite_usage */ } else { s->vol_sprite_usage = get_bits(&s->gb, 2); /* vol_sprite_usage */ } + if(s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE){ + if(s->vol_sprite_usage==STATIC_SPRITE){ + s->sprite_width = get_bits(&s->gb, 13); + skip_bits1(&s->gb); /* marker */ + s->sprite_height= get_bits(&s->gb, 13); + skip_bits1(&s->gb); /* marker */ + s->sprite_left = get_bits(&s->gb, 13); + skip_bits1(&s->gb); /* marker */ + s->sprite_top = get_bits(&s->gb, 13); + skip_bits1(&s->gb); /* marker */ + } + s->no_sprite_wraping_points= get_bits(&s->gb, 6); + s->sprite_warping_accuracy = get_bits(&s->gb, 2); + s->sprite_brightness_change= get_bits1(&s->gb); + if(s->vol_sprite_usage==STATIC_SPRITE) + s->low_latency_sprite= get_bits1(&s->gb); + } + // FIXME sadct disable bit if verid!=1 && shape not rect + if (get_bits1(&s->gb) == 1) { /* not_8_bit */ s->quant_precision = get_bits(&s->gb, 4); /* quant_precision */ skip_bits(&s->gb, 4); /* bits_per_pixel */ @@ -1560,25 +1591,66 @@ int mpeg4_decode_picture_header(MpegEncContext * s) s->quant_precision = 5; } - skip_bits1(&s->gb); /* vol_quant_type */ - skip_bits1(&s->gb); /* vol_quarter_pixel */ + // FIXME a bunch of grayscale shape things + if(get_bits1(&s->gb)) printf("Quant-Type not supported\n"); /* vol_quant_type */ //FIXME + if(vo_ver_id != 1) + s->quarter_sample= get_bits1(&s->gb); + else s->quarter_sample=0; + if(s->quarter_sample) printf("Quarter sample not supported\n"); +#if 0 + if(get_bits1(&s->gb)) printf("Complexity est disabled\n"); + if(get_bits1(&s->gb)) printf("resync disable\n"); +#else skip_bits1(&s->gb); /* complexity_estimation_disabled */ skip_bits1(&s->gb); /* resync_marker_disabled */ - skip_bits1(&s->gb); /* data_partioning_enabled */ - if (get_bits1(&s->gb) != 0) { /* scalability */ +#endif + s->data_partioning= get_bits1(&s->gb); + if(s->data_partioning){ + printf("data partitioning not supported\n"); + skip_bits1(&s->gb); // reversible vlc + } + + if(vo_ver_id != 1) { + s->new_pred= get_bits1(&s->gb); + if(s->new_pred){ + printf("new pred not supported\n"); + skip_bits(&s->gb, 2); /* requested upstream message type */ + skip_bits1(&s->gb); /* newpred segment type */ + } + s->reduced_res_vop= get_bits1(&s->gb); + if(s->reduced_res_vop) printf("reduced resolution VOP not supported\n"); + } + else{ + s->new_pred=0; + s->reduced_res_vop= 0; + } + + s->scalability= get_bits1(&s->gb); + if (s->scalability) { printf("bad scalability!!!\n"); return -1; } } +//printf("end Data %X %d\n", show_bits(&s->gb, 32), get_bits_count(&s->gb)&0x7); goto redo; - } else if (startcode != 0x1b6) { + } else if (startcode == 0x1b2) { //userdata +//printf("user Data %X\n", show_bits(&s->gb, 32)); + goto redo; + } else if (startcode != 0x1b6) { //VOP goto redo; } s->pict_type = get_bits(&s->gb, 2) + 1; /* pict type: I = 0 , P = 1 */ - if (s->pict_type != I_TYPE && - s->pict_type != P_TYPE) - return -1; + if(s->pict_type == B_TYPE) + { + printf("B-VOP\n"); + return -1; + } + if(s->pict_type == S_TYPE) + { + printf("S-VOP\n"); + return -1; + } /* XXX: parse time base */ time_incr = 0; @@ -1592,14 +1664,16 @@ int mpeg4_decode_picture_header(MpegEncContext * s) if (get_bits1(&s->gb) != 1) goto redo; - if (s->shape != 2 && s->pict_type == P_TYPE) { + if (s->shape != BIN_ONLY_SHAPE && ( s->pict_type == P_TYPE + || (s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE))) { /* rounding type for motion estimation */ s->no_rounding = get_bits1(&s->gb); } else { s->no_rounding = 0; } - - if (s->shape != 0) { +//FIXME reduced res stuff + + if (s->shape != RECT_SHAPE) { if (s->vol_sprite_usage != 1 || s->pict_type != I_TYPE) { int width, height, hor_spat_ref, ver_spat_ref; @@ -1617,10 +1691,20 @@ int mpeg4_decode_picture_header(MpegEncContext * s) skip_bits(&s->gb, 8); /* constant_alpha_value */ } } - - if (s->shape != 2) { +//FIXME complexity estimation stuff + + if (s->shape != BIN_ONLY_SHAPE) { skip_bits(&s->gb, 3); /* intra dc VLC threshold */ - + //FIXME interlaced specific bits + } + + if(s->pict_type == S_TYPE && (s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE)){ + if(s->no_sprite_wraping_points) printf("sprite_wraping_points not supported\n"); + if(s->sprite_brightness_change) printf("sprite_brightness_change not supported\n"); + if(s->vol_sprite_usage==STATIC_SPRITE) printf("static sprite not supported\n"); + } + + if (s->shape != BIN_ONLY_SHAPE) { /* note: we do not use quant_precision to avoid problem if no MPEG4 vol header as it is found on some old opendivx movies */ @@ -1629,10 +1713,17 @@ int mpeg4_decode_picture_header(MpegEncContext * s) if (s->pict_type != I_TYPE) { s->f_code = get_bits(&s->gb, 3); /* fcode_for */ } - if (s->shape && (s->pict_type != I_TYPE)) { - skip_bits1(&s->gb); // vop shape coding type + if (s->pict_type == B_TYPE) { + s->b_code = get_bits(&s->gb, 3); + } + + if(!s->scalability){ + if (s->shape!=RECT_SHAPE && s->pict_type!=I_TYPE) { + skip_bits1(&s->gb); // vop shape coding type + } } } +//printf("end Data %X %d\n", show_bits(&s->gb, 32), get_bits_count(&s->gb)&0x7); return 0; } |