static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) { GetBitContext *gb=&vc->gb; uint_fast8_t i, j; vc->mapping_count=get_bits(gb, 6)+1; vc->mappings=(vorbis_mapping *)av_mallocz(vc->mapping_count * sizeof(vorbis_mapping)); AV_DEBUG(" There are %d mappings. \n", vc->mapping_count); for(i=0;i<vc->mapping_count;++i) { vorbis_mapping *mapping_setup=&vc->mappings[i]; if (get_bits(gb, 16)) { av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n"); return 1; } if (get_bits1(gb)) { mapping_setup->submaps=get_bits(gb, 4)+1; } else { mapping_setup->submaps=1; } if (get_bits1(gb)) { mapping_setup->coupling_steps=get_bits(gb, 8)+1; mapping_setup->magnitude=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t)); mapping_setup->angle=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t)); for(j=0;j<mapping_setup->coupling_steps;++j) { mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1)); mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1)); // FIXME: sanity checks } } else { mapping_setup->coupling_steps=0; } AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps); if(get_bits(gb, 2)) { av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i); return 1; // following spec. } if (mapping_setup->submaps>1) { mapping_setup->mux=(uint_fast8_t *)av_mallocz(vc->audio_channels * sizeof(uint_fast8_t)); for(j=0;j<vc->audio_channels;++j) { mapping_setup->mux[j]=get_bits(gb, 4); } } for(j=0;j<mapping_setup->submaps;++j) { skip_bits(gb, 8); // FIXME check? mapping_setup->submap_floor[j]=get_bits(gb, 8); mapping_setup->submap_residue[j]=get_bits(gb, 8); AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]); } } return 0; }