static inline int decode_seq_parameter_set(H264Context *h){ MpegEncContext * const s = &h->s; int profile_idc, level_idc; unsigned int sps_id, tmp, mb_width, mb_height; int i; SPS *sps; profile_idc= get_bits(&s->gb, 8); get_bits1(&s->gb); //constraint_set0_flag get_bits1(&s->gb); //constraint_set1_flag get_bits1(&s->gb); //constraint_set2_flag get_bits1(&s->gb); //constraint_set3_flag get_bits(&s->gb, 4); // reserved level_idc= get_bits(&s->gb, 8); sps_id= get_ue_golomb(&s->gb); sps = alloc_parameter_set(h, (void **)h->sps_buffers, sps_id, MAX_SPS_COUNT, sizeof(SPS), "sps"); if(sps == NULL) return -1; sps->profile_idc= profile_idc; sps->level_idc= level_idc; memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4)); memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8)); sps->scaling_matrix_present = 0; if(sps->profile_idc >= 100){ //high profile sps->chroma_format_idc= get_ue_golomb(&s->gb); if(sps->chroma_format_idc == 3) get_bits1(&s->gb); //residual_color_transform_flag get_ue_golomb(&s->gb); //bit_depth_luma_minus8 get_ue_golomb(&s->gb); //bit_depth_chroma_minus8 sps->transform_bypass = get_bits1(&s->gb); decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8); }else{ sps->chroma_format_idc= 1; } sps->log2_max_frame_num= get_ue_golomb(&s->gb) + 4; sps->poc_type= get_ue_golomb(&s->gb); if(sps->poc_type == 0){ //FIXME #define sps->log2_max_poc_lsb= get_ue_golomb(&s->gb) + 4; } else if(sps->poc_type == 1){//FIXME #define sps->delta_pic_order_always_zero_flag= get_bits1(&s->gb); sps->offset_for_non_ref_pic= get_se_golomb(&s->gb); sps->offset_for_top_to_bottom_field= get_se_golomb(&s->gb); tmp= get_ue_golomb(&s->gb); if(tmp >= sizeof(sps->offset_for_ref_frame) / sizeof(sps->offset_for_ref_frame[0])){ av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", tmp); return -1; } sps->poc_cycle_length= tmp; for(i=0; i<sps->poc_cycle_length; i++) sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb); }else if(sps->poc_type != 2){ av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type); return -1; } tmp= get_ue_golomb(&s->gb); if(tmp > MAX_PICTURE_COUNT-2 || tmp >= 32){ av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n"); return -1; } sps->ref_frame_count= tmp; sps->gaps_in_frame_num_allowed_flag= get_bits1(&s->gb); mb_width= get_ue_golomb(&s->gb) + 1; mb_height= get_ue_golomb(&s->gb) + 1; if(mb_width >= INT_MAX/16 || mb_height >= INT_MAX/16 || avcodec_check_dimensions(NULL, 16*mb_width, 16*mb_height)){ av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n"); return -1; } sps->mb_width = mb_width; sps->mb_height= mb_height; sps->frame_mbs_only_flag= get_bits1(&s->gb); if(!sps->frame_mbs_only_flag) sps->mb_aff= get_bits1(&s->gb); else sps->mb_aff= 0; sps->direct_8x8_inference_flag= get_bits1(&s->gb); #ifndef ALLOW_INTERLACE if(sps->mb_aff) av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n"); #endif if(!sps->direct_8x8_inference_flag && sps->mb_aff) av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF + !direct_8x8_inference is not implemented\n"); sps->crop= get_bits1(&s->gb); if(sps->crop){ sps->crop_left = get_ue_golomb(&s->gb); sps->crop_right = get_ue_golomb(&s->gb); sps->crop_top = get_ue_golomb(&s->gb); sps->crop_bottom= get_ue_golomb(&s->gb); if(sps->crop_left || sps->crop_top){ av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n"); } if(sps->crop_right >= 8 || sps->crop_bottom >= (8>> !sps->frame_mbs_only_flag)){ av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n"); } }else{ sps->crop_left = sps->crop_right = sps->crop_top = sps->crop_bottom= 0; } sps->vui_parameters_present_flag= get_bits1(&s->gb); if( sps->vui_parameters_present_flag ) decode_vui_parameters(h, sps); if(s->avctx->debug&FF_DEBUG_PICT_INFO){ av_log(h->s.avctx, AV_LOG_DEBUG, "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%d/%d/%d/%d %s %s\n", sps_id, sps->profile_idc, sps->level_idc, sps->poc_type, sps->ref_frame_count, sps->mb_width, sps->mb_height, sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"), sps->direct_8x8_inference_flag ? "8B8" : "", sps->crop_left, sps->crop_right, sps->crop_top, sps->crop_bottom, sps->vui_parameters_present_flag ? "VUI" : "", ((const char*[]){"Gray","420","422","444"})[sps->chroma_format_idc] ); } return 0; }