static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) { GetBitContext *gb=&vc->gb; uint_fast16_t i,j,k; vc->floor_count=get_bits(gb, 6)+1; vc->floors=av_mallocz(vc->floor_count * sizeof(vorbis_floor)); for (i=0;i<vc->floor_count;++i) { vorbis_floor *floor_setup=&vc->floors[i]; floor_setup->floor_type=get_bits(gb, 16); AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type); if (floor_setup->floor_type==1) { uint_fast8_t maximum_class=0; uint_fast8_t rangebits; uint_fast16_t floor1_values=2; floor_setup->decode=vorbis_floor1_decode; floor_setup->data.t1.partitions=get_bits(gb, 5); AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions); for(j=0;j<floor_setup->data.t1.partitions;++j) { floor_setup->data.t1.partition_class[j]=get_bits(gb, 4); if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j]; AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]); } AV_DEBUG(" maximum class %d \n", maximum_class); floor_setup->data.t1.maximum_class=maximum_class; for(j=0;j<=maximum_class;++j) { floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1; floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2); AV_DEBUG(" %d floor %d class dim: %d subclasses %d \n", i, j, floor_setup->data.t1.class_dimensions[j], floor_setup->data.t1.class_subclasses[j]); if (floor_setup->data.t1.class_subclasses[j]) { floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8); AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]); } for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) { floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1; AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]); } } floor_setup->data.t1.multiplier=get_bits(gb, 2)+1; floor_setup->data.t1.x_list_dim=2; for(j=0;j<floor_setup->data.t1.partitions;++j) { floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; } floor_setup->data.t1.list=av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(vorbis_floor1_entry)); rangebits=get_bits(gb, 4); floor_setup->data.t1.list[0].x = 0; floor_setup->data.t1.list[1].x = (1<<rangebits); for(j=0;j<floor_setup->data.t1.partitions;++j) { for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) { floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits); AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x); } } // Precalculate order of x coordinates - needed for decode ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim); } else if(floor_setup->floor_type==0) { uint_fast8_t max_codebook_dim=0; floor_setup->decode=vorbis_floor0_decode; floor_setup->data.t0.order=get_bits(gb, 8); floor_setup->data.t0.rate=get_bits(gb, 16); floor_setup->data.t0.bark_map_size=get_bits(gb, 16); floor_setup->data.t0.amplitude_bits=get_bits(gb, 6); /* zero would result in a div by zero later * * 2^0 - 1 == 0 */ if (floor_setup->data.t0.amplitude_bits == 0) { av_log(vc->avccontext, AV_LOG_ERROR, "Floor 0 amplitude bits is 0.\n"); return 1; } floor_setup->data.t0.amplitude_offset=get_bits(gb, 8); floor_setup->data.t0.num_books=get_bits(gb, 4)+1; /* allocate mem for booklist */ floor_setup->data.t0.book_list= av_malloc(floor_setup->data.t0.num_books); if(!floor_setup->data.t0.book_list) { return 1; } /* read book indexes */ { int idx; uint_fast8_t book_idx; for (idx=0;idx<floor_setup->data.t0.num_books;++idx) { book_idx=get_bits(gb, 8); if (book_idx>=vc->codebook_count) return 1; floor_setup->data.t0.book_list[idx]=book_idx; if (vc->codebooks[book_idx].dimensions > max_codebook_dim) max_codebook_dim=vc->codebooks[book_idx].dimensions; } } create_map( vc, i ); /* allocate mem for lsp coefficients */ { /* codebook dim is for padding if codebook dim doesn't * * divide order+1 then we need to read more data */ floor_setup->data.t0.lsp= av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim) * sizeof(float)); if(!floor_setup->data.t0.lsp) { return 1; } } #ifdef V_DEBUG /* debug output parsed headers */ AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order); AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate); AV_DEBUG("floor0 bark map size: %u\n", floor_setup->data.t0.bark_map_size); AV_DEBUG("floor0 amplitude bits: %u\n", floor_setup->data.t0.amplitude_bits); AV_DEBUG("floor0 amplitude offset: %u\n", floor_setup->data.t0.amplitude_offset); AV_DEBUG("floor0 number of books: %u\n", floor_setup->data.t0.num_books); AV_DEBUG("floor0 book list pointer: %p\n", floor_setup->data.t0.book_list); { int idx; for (idx=0;idx<floor_setup->data.t0.num_books;++idx) { AV_DEBUG( " Book %d: %u\n", idx+1, floor_setup->data.t0.book_list[idx] ); } } #endif } else { av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n"); return 1; } } return 0; }