| /** | |
| * @file | |
| * Vorbis I decoder | |
| * @author Denes Balatoni ( dbalatoni programozo hu ) | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| /** | |
| * @file | |
| * Vorbis I decoder | |
| * @author Denes Balatoni ( dbalatoni programozo hu ) | |
| */ | |
| #include <inttypes.h> | |
| #include <math.h> | |
| #include "libavutil/avassert.h" | |
| #include "libavutil/float_dsp.h" | |
| #include "libavutil/tx.h" | |
| #define BITSTREAM_READER_LE | |
| #include "avcodec.h" | |
| #include "codec_internal.h" | |
| #include "decode.h" | |
| #include "get_bits.h" | |
| #include "internal.h" | |
| #include "vorbis.h" | |
| #include "vorbisdsp.h" | |
| #include "vorbis_data.h" | |
| #include "xiph.h" | |
| #define V_NB_BITS 8 | |
| #define V_NB_BITS2 11 | |
| #define V_MAX_VLCS (1 << 16) | |
| #define V_MAX_PARTITIONS (1 << 20) | |
| typedef struct vorbis_codebook { | |
| uint8_t dimensions; | |
| uint8_t lookup_type; | |
| uint8_t maxdepth; | |
| VLC vlc; | |
| float *codevectors; | |
| unsigned int nb_bits; | |
| } vorbis_codebook; | |
| typedef union vorbis_floor_u vorbis_floor_data; | |
| typedef struct vorbis_floor0_s vorbis_floor0; | |
| typedef struct vorbis_floor1_s vorbis_floor1; | |
| struct vorbis_context_s; | |
| typedef | |
| int (* vorbis_floor_decode_func) | |
| (struct vorbis_context_s *, vorbis_floor_data *, float *); | |
| typedef struct vorbis_floor { | |
| uint8_t floor_type; | |
| vorbis_floor_decode_func decode; | |
| union vorbis_floor_u { | |
| struct vorbis_floor0_s { | |
| uint8_t order; | |
| uint16_t rate; | |
| uint16_t bark_map_size; | |
| int32_t *map[2]; | |
| uint32_t map_size[2]; | |
| uint8_t amplitude_bits; | |
| uint8_t amplitude_offset; | |
| uint8_t num_books; | |
| uint8_t *book_list; | |
| float *lsp; | |
| } t0; | |
| struct vorbis_floor1_s { | |
| uint8_t partitions; | |
| uint8_t partition_class[32]; | |
| uint8_t class_dimensions[16]; | |
| uint8_t class_subclasses[16]; | |
| uint8_t class_masterbook[16]; | |
| int16_t subclass_books[16][8]; | |
| uint8_t multiplier; | |
| uint16_t x_list_dim; | |
| vorbis_floor1_entry *list; | |
| } t1; | |
| } data; | |
| } vorbis_floor; | |
| typedef struct vorbis_residue { | |
| uint16_t type; | |
| uint32_t begin; | |
| uint32_t end; | |
| unsigned partition_size; | |
| uint8_t classifications; | |
| uint8_t classbook; | |
| int16_t books[64][8]; | |
| uint8_t maxpass; | |
| uint16_t ptns_to_read; | |
| uint8_t *classifs; | |
| } vorbis_residue; | |
| typedef struct vorbis_mapping { | |
| uint8_t submaps; | |
| uint16_t coupling_steps; | |
| uint8_t *magnitude; | |
| uint8_t *angle; | |
| uint8_t *mux; | |
| uint8_t submap_floor[16]; | |
| uint8_t submap_residue[16]; | |
| } vorbis_mapping; | |
| typedef struct vorbis_mode { | |
| uint8_t blockflag; | |
| uint16_t windowtype; | |
| uint16_t transformtype; | |
| uint8_t mapping; | |
| } vorbis_mode; | |
| typedef struct vorbis_context_s { | |
| AVCodecContext *avctx; | |
| GetBitContext gb; | |
| VorbisDSPContext dsp; | |
| AVFloatDSPContext *fdsp; | |
| AVTXContext *mdct[2]; | |
| av_tx_fn mdct_fn[2]; | |
| uint8_t first_frame; | |
| uint32_t version; | |
| uint8_t audio_channels; | |
| uint32_t audio_samplerate; | |
| uint32_t bitrate_maximum; | |
| uint32_t bitrate_nominal; | |
| uint32_t bitrate_minimum; | |
| uint32_t blocksize[2]; | |
| const float *win[2]; | |
| uint16_t codebook_count; | |
| vorbis_codebook *codebooks; | |
| uint8_t floor_count; | |
| vorbis_floor *floors; | |
| uint8_t residue_count; | |
| vorbis_residue *residues; | |
| uint8_t mapping_count; | |
| vorbis_mapping *mappings; | |
| uint8_t mode_count; | |
| vorbis_mode *modes; | |
| uint8_t mode_number; // mode number for the current packet | |
| int8_t previous_window; | |
| float *channel_residues; | |
| float *saved; | |
| } vorbis_context; | |
| /* Helper functions */ | |
| #define BARK(x) \ | |
| (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x)) | |
| static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n"; | |
| #define VALIDATE_INDEX(idx, limit) \ | |
| if (idx >= limit) {\ | |
| av_log(vc->avctx, AV_LOG_ERROR,\ | |
| idx_err_str,\ | |
| (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\ | |
| return AVERROR_INVALIDDATA;\ | |
| } | |
| #define GET_VALIDATED_INDEX(idx, bits, limit) \ | |
| {\ | |
| idx = get_bits(gb, bits);\ | |
| VALIDATE_INDEX(idx, limit)\ | |
| } | |
| static float vorbisfloat2float(unsigned val) | |
| { | |
| double mant = val & 0x1fffff; | |
| long exp = (val & 0x7fe00000L) >> 21; | |
| if (val & 0x80000000) | |
| mant = -mant; | |
| return ldexp(mant, exp - 20 - 768); | |
| } | |
| // Free all allocated memory ----------------------------------------- | |
| static void vorbis_free(vorbis_context *vc) | |
| { | |
| int i; | |
| av_freep(&vc->channel_residues); | |
| av_freep(&vc->saved); | |
| av_freep(&vc->fdsp); | |
| if (vc->residues) | |
| for (i = 0; i < vc->residue_count; i++) | |
| av_freep(&vc->residues[i].classifs); | |
| av_freep(&vc->residues); | |
| av_freep(&vc->modes); | |
| av_tx_uninit(&vc->mdct[0]); | |
| av_tx_uninit(&vc->mdct[1]); | |
| if (vc->codebooks) | |
| for (i = 0; i < vc->codebook_count; ++i) { | |
| av_freep(&vc->codebooks[i].codevectors); | |
| ff_vlc_free(&vc->codebooks[i].vlc); | |
| } | |
| av_freep(&vc->codebooks); | |
| if (vc->floors) | |
| for (i = 0; i < vc->floor_count; ++i) { | |
| if (vc->floors[i].floor_type == 0) { | |
| av_freep(&vc->floors[i].data.t0.map[0]); | |
| av_freep(&vc->floors[i].data.t0.map[1]); | |
| av_freep(&vc->floors[i].data.t0.book_list); | |
| av_freep(&vc->floors[i].data.t0.lsp); | |
| } else { | |
| av_freep(&vc->floors[i].data.t1.list); | |
| } | |
| } | |
| av_freep(&vc->floors); | |
| if (vc->mappings) | |
| for (i = 0; i < vc->mapping_count; ++i) { | |
| av_freep(&vc->mappings[i].magnitude); | |
| av_freep(&vc->mappings[i].angle); | |
| av_freep(&vc->mappings[i].mux); | |
| } | |
| av_freep(&vc->mappings); | |
| } | |
| // Parse setup header ------------------------------------------------- | |
| // Process codebooks part | |
| static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) | |
| { | |
| unsigned cb; | |
| uint8_t *tmp_vlc_bits = NULL; | |
| uint32_t *tmp_vlc_codes = NULL; | |
| GetBitContext *gb = &vc->gb; | |
| uint16_t *codebook_multiplicands = NULL; | |
| int ret = 0; | |
| vc->codebook_count = get_bits(gb, 8) + 1; | |
| ff_dlog(NULL, " Codebooks: %d \n", vc->codebook_count); | |
| vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks)); | |
| tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits)); | |
| tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes)); | |
| codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands)); | |
| if (!vc->codebooks || | |
| !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) { | |
| ret = AVERROR(ENOMEM); | |
| goto error; | |
| } | |
| for (cb = 0; cb < vc->codebook_count; ++cb) { | |
| vorbis_codebook *codebook_setup = &vc->codebooks[cb]; | |
| unsigned ordered, t, entries, used_entries = 0; | |
| ff_dlog(NULL, " %u. Codebook\n", cb); | |
| if (get_bits(gb, 24) != 0x564342) { | |
| av_log(vc->avctx, AV_LOG_ERROR, | |
| " %u. Codebook setup data corrupt.\n", cb); | |
| ret = AVERROR_INVALIDDATA; | |
| goto error; | |
| } | |
| codebook_setup->dimensions=get_bits(gb, 16); | |
| if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) { | |
| av_log(vc->avctx, AV_LOG_ERROR, | |
| " %u. Codebook's dimension is invalid (%d).\n", | |
| cb, codebook_setup->dimensions); | |
| ret = AVERROR_INVALIDDATA; | |
| goto error; | |
| } | |
| entries = get_bits(gb, 24); | |
| if (entries > V_MAX_VLCS) { | |
| av_log(vc->avctx, AV_LOG_ERROR, | |
| " %u. Codebook has too many entries (%u).\n", | |
| cb, entries); | |
| ret = AVERROR_INVALIDDATA; | |
| goto error; | |
| } | |
| ordered = get_bits1(gb); | |
| ff_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n", | |
| codebook_setup->dimensions, entries); | |
| if (!ordered) { | |
| unsigned ce, flag; | |
| unsigned sparse = get_bits1(gb); | |
| ff_dlog(NULL, " not ordered \n"); | |
| if (sparse) { | |
| ff_dlog(NULL, " sparse \n"); | |
| used_entries = 0; | |
| for (ce = 0; ce < entries; ++ce) { | |
| flag = get_bits1(gb); | |
| if (flag) { | |
| tmp_vlc_bits[ce] = get_bits(gb, 5) + 1; | |
| ++used_entries; | |
| } else | |
| tmp_vlc_bits[ce] = 0; | |
| } | |
| } else { | |
| ff_dlog(NULL, " not sparse \n"); | |
| used_entries = entries; | |
| for (ce = 0; ce < entries; ++ce) | |
| tmp_vlc_bits[ce] = get_bits(gb, 5) + 1; | |
| } | |
| } else { | |
| unsigned current_entry = 0; | |
| unsigned current_length = get_bits(gb, 5) + 1; | |
| ff_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME | |
| used_entries = entries; | |
| for (; current_entry < used_entries && current_length <= 32; ++current_length) { | |
| unsigned i, number; | |
| ff_dlog(NULL, " number bits: %u ", ilog(entries - current_entry)); | |
| number = get_bits(gb, ilog(entries - current_entry)); | |
| ff_dlog(NULL, " number: %u\n", number); | |
| for (i = current_entry; i < number+current_entry; ++i) | |
| if (i < used_entries) | |
| tmp_vlc_bits[i] = current_length; | |
| current_entry+=number; | |
| } | |
| if (current_entry>used_entries) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " More codelengths than codes in codebook. \n"); | |
| ret = AVERROR_INVALIDDATA; | |
| goto error; | |
| } | |
| } | |
| codebook_setup->lookup_type = get_bits(gb, 4); | |
| ff_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type, | |
| codebook_setup->lookup_type ? "vq" : "no lookup"); | |
| // If the codebook is used for (inverse) VQ, calculate codevectors. | |
| if (codebook_setup->lookup_type == 1) { | |
| unsigned i, j, k; | |
| unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions); | |
| float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32)); | |
| float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32)); | |
| unsigned codebook_value_bits = get_bits(gb, 4) + 1; | |
| unsigned codebook_sequence_p = get_bits1(gb); | |
| if (!isfinite(codebook_minimum_value) || !isfinite(codebook_delta_value)) { | |
| ret = AVERROR_INVALIDDATA; | |
| goto error; | |
| } | |
| ff_dlog(NULL, " We expect %d numbers for building the codevectors. \n", | |
| codebook_lookup_values); | |
| ff_dlog(NULL, " delta %f minmum %f \n", | |
| codebook_delta_value, codebook_minimum_value); | |
| for (i = 0; i < codebook_lookup_values; ++i) { | |
| codebook_multiplicands[i] = get_bits(gb, codebook_value_bits); | |
| ff_dlog(NULL, " multiplicands*delta+minmum : %e \n", | |
| (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value); | |
| ff_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]); | |
| } | |
| // Weed out unused vlcs and build codevector vector | |
| if (used_entries) { | |
| codebook_setup->codevectors = | |
| av_calloc(used_entries, codebook_setup->dimensions * | |
| sizeof(*codebook_setup->codevectors)); | |
| if (!codebook_setup->codevectors) { | |
| ret = AVERROR(ENOMEM); | |
| goto error; | |
| } | |
| } else | |
| codebook_setup->codevectors = NULL; | |
| for (j = 0, i = 0; i < entries; ++i) { | |
| unsigned dim = codebook_setup->dimensions; | |
| if (tmp_vlc_bits[i]) { | |
| float last = 0.0; | |
| unsigned lookup_offset = i; | |
| ff_dlog(vc->avctx, "Lookup offset %u ,", i); | |
| for (k = 0; k < dim; ++k) { | |
| unsigned multiplicand_offset = lookup_offset % codebook_lookup_values; | |
| codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last; | |
| if (codebook_sequence_p) | |
| last = codebook_setup->codevectors[j * dim + k]; | |
| lookup_offset/=codebook_lookup_values; | |
| } | |
| tmp_vlc_bits[j] = tmp_vlc_bits[i]; | |
| ff_dlog(vc->avctx, "real lookup offset %u, vector: ", j); | |
| for (k = 0; k < dim; ++k) | |
| ff_dlog(vc->avctx, " %f ", | |
| codebook_setup->codevectors[j * dim + k]); | |
| ff_dlog(vc->avctx, "\n"); | |
| ++j; | |
| } | |
| } | |
| if (j != used_entries) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n"); | |
| ret = AVERROR_INVALIDDATA; | |
| goto error; | |
| } | |
| entries = used_entries; | |
| } else if (codebook_setup->lookup_type >= 2) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n"); | |
| ret = AVERROR_INVALIDDATA; | |
| goto error; | |
| } | |
| // Initialize VLC table | |
| if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n"); | |
| ret = AVERROR_INVALIDDATA; | |
| goto error; | |
| } | |
| codebook_setup->maxdepth = 0; | |
| for (t = 0; t < entries; ++t) | |
| if (tmp_vlc_bits[t] >= codebook_setup->maxdepth) | |
| codebook_setup->maxdepth = tmp_vlc_bits[t]; | |
| if (codebook_setup->maxdepth > 3 * V_NB_BITS) | |
| codebook_setup->nb_bits = V_NB_BITS2; | |
| else | |
| codebook_setup->nb_bits = V_NB_BITS; | |
| codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits; | |
| if ((ret = vlc_init(&codebook_setup->vlc, codebook_setup->nb_bits, | |
| entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits), | |
| sizeof(*tmp_vlc_bits), tmp_vlc_codes, | |
| sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes), | |
| VLC_INIT_LE))) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n"); | |
| goto error; | |
| } | |
| } | |
| av_free(tmp_vlc_bits); | |
| av_free(tmp_vlc_codes); | |
| av_free(codebook_multiplicands); | |
| return 0; | |
| // Error: | |
| error: | |
| av_free(tmp_vlc_bits); | |
| av_free(tmp_vlc_codes); | |
| av_free(codebook_multiplicands); | |
| return ret; | |
| } | |
| // Process time domain transforms part (unused in Vorbis I) | |
| static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) | |
| { | |
| GetBitContext *gb = &vc->gb; | |
| unsigned i, vorbis_time_count = get_bits(gb, 6) + 1; | |
| for (i = 0; i < vorbis_time_count; ++i) { | |
| unsigned vorbis_tdtransform = get_bits(gb, 16); | |
| ff_dlog(NULL, " Vorbis time domain transform %u: %u\n", | |
| vorbis_time_count, vorbis_tdtransform); | |
| if (vorbis_tdtransform) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| } | |
| return 0; | |
| } | |
| // Process floors part | |
| static int vorbis_floor0_decode(vorbis_context *vc, | |
| vorbis_floor_data *vfu, float *vec); | |
| static int create_map(vorbis_context *vc, unsigned floor_number); | |
| static int vorbis_floor1_decode(vorbis_context *vc, | |
| vorbis_floor_data *vfu, float *vec); | |
| static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) | |
| { | |
| GetBitContext *gb = &vc->gb; | |
| int i, j, k, ret; | |
| vc->floor_count = get_bits(gb, 6) + 1; | |
| vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors)); | |
| if (!vc->floors) | |
| return AVERROR(ENOMEM); | |
| for (i = 0; i < vc->floor_count; ++i) { | |
| vorbis_floor *floor_setup = &vc->floors[i]; | |
| floor_setup->floor_type = get_bits(gb, 16); | |
| ff_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type); | |
| if (floor_setup->floor_type == 1) { | |
| int maximum_class = -1; | |
| unsigned rangebits, rangemax, floor1_values = 2; | |
| floor_setup->decode = vorbis_floor1_decode; | |
| floor_setup->data.t1.partitions = get_bits(gb, 5); | |
| ff_dlog(NULL, " %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]; | |
| ff_dlog(NULL, " %d. floor %d partition class %d \n", | |
| i, j, floor_setup->data.t1.partition_class[j]); | |
| } | |
| ff_dlog(NULL, " maximum class %d \n", 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); | |
| ff_dlog(NULL, " %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]) { | |
| GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count) | |
| ff_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]); | |
| } | |
| for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) { | |
| int16_t bits = get_bits(gb, 8) - 1; | |
| if (bits != -1) | |
| VALIDATE_INDEX(bits, vc->codebook_count) | |
| floor_setup->data.t1.subclass_books[j][k] = bits; | |
| ff_dlog(NULL, " 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_calloc(floor_setup->data.t1.x_list_dim, | |
| sizeof(*floor_setup->data.t1.list)); | |
| if (!floor_setup->data.t1.list) | |
| return AVERROR(ENOMEM); | |
| rangebits = get_bits(gb, 4); | |
| if (!rangebits && floor_setup->data.t1.partitions) { | |
| av_log(vc->avctx, AV_LOG_ERROR, | |
| "A rangebits value of 0 is not compliant with the Vorbis I specification.\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| rangemax = (1 << rangebits); | |
| if (rangemax > vc->blocksize[1] / 2) { | |
| av_log(vc->avctx, AV_LOG_ERROR, | |
| "Floor value is too large for blocksize: %u (%"PRIu32")\n", | |
| rangemax, vc->blocksize[1] / 2); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| floor_setup->data.t1.list[0].x = 0; | |
| floor_setup->data.t1.list[1].x = rangemax; | |
| 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); | |
| ff_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values, | |
| floor_setup->data.t1.list[floor1_values].x); | |
| } | |
| } | |
| // Precalculate order of x coordinates - needed for decode | |
| if (ff_vorbis_ready_floor1_list(vc->avctx, | |
| floor_setup->data.t1.list, | |
| floor_setup->data.t1.x_list_dim)) { | |
| return AVERROR_INVALIDDATA; | |
| } | |
| } else if (floor_setup->floor_type == 0) { | |
| unsigned max_codebook_dim = 0; | |
| floor_setup->decode = vorbis_floor0_decode; | |
| floor_setup->data.t0.order = get_bits(gb, 8); | |
| if (!floor_setup->data.t0.order) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| floor_setup->data.t0.rate = get_bits(gb, 16); | |
| if (!floor_setup->data.t0.rate) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| floor_setup->data.t0.bark_map_size = get_bits(gb, 16); | |
| if (!floor_setup->data.t0.bark_map_size) { | |
| av_log(vc->avctx, AV_LOG_ERROR, | |
| "Floor 0 bark map size is 0.\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| floor_setup->data.t0.amplitude_bits = get_bits(gb, 6); | |
| 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 AVERROR(ENOMEM); | |
| /* read book indexes */ | |
| { | |
| int idx; | |
| unsigned book_idx; | |
| for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) { | |
| GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count) | |
| 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; | |
| } | |
| } | |
| if ((ret = create_map(vc, i)) < 0) | |
| return ret; | |
| /* 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_array((floor_setup->data.t0.order + 1 + max_codebook_dim), | |
| sizeof(*floor_setup->data.t0.lsp)); | |
| if (!floor_setup->data.t0.lsp) | |
| return AVERROR(ENOMEM); | |
| /* debug output parsed headers */ | |
| ff_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order); | |
| ff_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate); | |
| ff_dlog(NULL, "floor0 bark map size: %u\n", | |
| floor_setup->data.t0.bark_map_size); | |
| ff_dlog(NULL, "floor0 amplitude bits: %u\n", | |
| floor_setup->data.t0.amplitude_bits); | |
| ff_dlog(NULL, "floor0 amplitude offset: %u\n", | |
| floor_setup->data.t0.amplitude_offset); | |
| ff_dlog(NULL, "floor0 number of books: %u\n", | |
| floor_setup->data.t0.num_books); | |
| ff_dlog(NULL, "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) { | |
| ff_dlog(NULL, " Book %d: %u\n", idx + 1, | |
| floor_setup->data.t0.book_list[idx]); | |
| } | |
| } | |
| } else { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| } | |
| return 0; | |
| } | |
| // Process residues part | |
| static int vorbis_parse_setup_hdr_residues(vorbis_context *vc) | |
| { | |
| GetBitContext *gb = &vc->gb; | |
| unsigned i, j, k; | |
| vc->residue_count = get_bits(gb, 6)+1; | |
| vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues)); | |
| if (!vc->residues) | |
| return AVERROR(ENOMEM); | |
| ff_dlog(NULL, " There are %d residues. \n", vc->residue_count); | |
| for (i = 0; i < vc->residue_count; ++i) { | |
| vorbis_residue *res_setup = &vc->residues[i]; | |
| uint8_t cascade[64]; | |
| unsigned high_bits, low_bits; | |
| res_setup->type = get_bits(gb, 16); | |
| ff_dlog(NULL, " %u. residue type %d\n", i, res_setup->type); | |
| res_setup->begin = get_bits(gb, 24); | |
| res_setup->end = get_bits(gb, 24); | |
| res_setup->partition_size = get_bits(gb, 24) + 1; | |
| /* Validations to prevent a buffer overflow later. */ | |
| if (res_setup->begin>res_setup->end || | |
| (res_setup->end-res_setup->begin) / res_setup->partition_size > FFMIN(V_MAX_PARTITIONS, 65535)) { | |
| av_log(vc->avctx, AV_LOG_ERROR, | |
| "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n", | |
| res_setup->type, res_setup->begin, res_setup->end, | |
| res_setup->partition_size, vc->blocksize[1] / 2); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| res_setup->classifications = get_bits(gb, 6) + 1; | |
| GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count) | |
| res_setup->ptns_to_read = | |
| (res_setup->end - res_setup->begin) / res_setup->partition_size; | |
| res_setup->classifs = av_malloc_array(res_setup->ptns_to_read, | |
| vc->audio_channels * | |
| sizeof(*res_setup->classifs)); | |
| if (!res_setup->classifs) | |
| return AVERROR(ENOMEM); | |
| ff_dlog(NULL, " begin %"PRIu32" end %"PRIu32" part.size %u classif.s %"PRIu8" classbook %"PRIu8"\n", | |
| res_setup->begin, res_setup->end, res_setup->partition_size, | |
| res_setup->classifications, res_setup->classbook); | |
| for (j = 0; j < res_setup->classifications; ++j) { | |
| high_bits = 0; | |
| low_bits = get_bits(gb, 3); | |
| if (get_bits1(gb)) | |
| high_bits = get_bits(gb, 5); | |
| cascade[j] = (high_bits << 3) + low_bits; | |
| ff_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j])); | |
| } | |
| res_setup->maxpass = 0; | |
| for (j = 0; j < res_setup->classifications; ++j) { | |
| for (k = 0; k < 8; ++k) { | |
| if (cascade[j]&(1 << k)) { | |
| GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count) | |
| ff_dlog(NULL, " %u class cascade depth %u book: %d\n", | |
| j, k, res_setup->books[j][k]); | |
| if (k>res_setup->maxpass) | |
| res_setup->maxpass = k; | |
| } else { | |
| res_setup->books[j][k] = -1; | |
| } | |
| } | |
| } | |
| } | |
| return 0; | |
| } | |
| // Process mappings part | |
| static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) | |
| { | |
| GetBitContext *gb = &vc->gb; | |
| unsigned i, j; | |
| vc->mapping_count = get_bits(gb, 6)+1; | |
| vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings)); | |
| if (!vc->mappings) | |
| return AVERROR(ENOMEM); | |
| ff_dlog(NULL, " 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->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| 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; | |
| if (vc->audio_channels < 2) { | |
| av_log(vc->avctx, AV_LOG_ERROR, | |
| "Square polar channel mapping with less than two channels is not compliant with the Vorbis I specification.\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps * | |
| sizeof(*mapping_setup->magnitude)); | |
| mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps * | |
| sizeof(*mapping_setup->angle)); | |
| if (!mapping_setup->angle || !mapping_setup->magnitude) | |
| return AVERROR(ENOMEM); | |
| for (j = 0; j < mapping_setup->coupling_steps; ++j) { | |
| GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels) | |
| GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels) | |
| } | |
| } else { | |
| mapping_setup->coupling_steps = 0; | |
| } | |
| ff_dlog(NULL, " %u mapping coupling steps: %d\n", | |
| i, mapping_setup->coupling_steps); | |
| if (get_bits(gb, 2)) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i); | |
| return AVERROR_INVALIDDATA; // following spec. | |
| } | |
| if (mapping_setup->submaps>1) { | |
| mapping_setup->mux = av_calloc(vc->audio_channels, | |
| sizeof(*mapping_setup->mux)); | |
| if (!mapping_setup->mux) | |
| return AVERROR(ENOMEM); | |
| 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? | |
| GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count) | |
| GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count) | |
| ff_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j, | |
| mapping_setup->submap_floor[j], | |
| mapping_setup->submap_residue[j]); | |
| } | |
| } | |
| return 0; | |
| } | |
| // Process modes part | |
| static int create_map(vorbis_context *vc, unsigned floor_number) | |
| { | |
| vorbis_floor *floors = vc->floors; | |
| vorbis_floor0 *vf; | |
| int idx; | |
| int blockflag, n; | |
| int32_t *map; | |
| for (blockflag = 0; blockflag < 2; ++blockflag) { | |
| n = vc->blocksize[blockflag] / 2; | |
| floors[floor_number].data.t0.map[blockflag] = | |
| av_malloc_array(n + 1, sizeof(int32_t)); // n + sentinel | |
| if (!floors[floor_number].data.t0.map[blockflag]) | |
| return AVERROR(ENOMEM); | |
| map = floors[floor_number].data.t0.map[blockflag]; | |
| vf = &floors[floor_number].data.t0; | |
| for (idx = 0; idx < n; ++idx) { | |
| map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) * | |
| (vf->bark_map_size / BARK(vf->rate / 2.0f))); | |
| if (vf->bark_map_size-1 < map[idx]) | |
| map[idx] = vf->bark_map_size - 1; | |
| } | |
| map[n] = -1; | |
| vf->map_size[blockflag] = n; | |
| } | |
| for (idx = 0; idx <= n; ++idx) { | |
| ff_dlog(NULL, "floor0 map: map at pos %d is %"PRId32"\n", idx, map[idx]); | |
| } | |
| return 0; | |
| } | |
| static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) | |
| { | |
| GetBitContext *gb = &vc->gb; | |
| unsigned i; | |
| vc->mode_count = get_bits(gb, 6) + 1; | |
| vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes)); | |
| if (!vc->modes) | |
| return AVERROR(ENOMEM); | |
| ff_dlog(NULL, " There are %d modes.\n", vc->mode_count); | |
| for (i = 0; i < vc->mode_count; ++i) { | |
| vorbis_mode *mode_setup = &vc->modes[i]; | |
| mode_setup->blockflag = get_bits1(gb); | |
| mode_setup->windowtype = get_bits(gb, 16); //FIXME check | |
| mode_setup->transformtype = get_bits(gb, 16); //FIXME check | |
| GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count); | |
| ff_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n", | |
| i, mode_setup->blockflag, mode_setup->windowtype, | |
| mode_setup->transformtype, mode_setup->mapping); | |
| } | |
| return 0; | |
| } | |
| // Process the whole setup header using the functions above | |
| static int vorbis_parse_setup_hdr(vorbis_context *vc) | |
| { | |
| GetBitContext *gb = &vc->gb; | |
| int ret; | |
| if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') || | |
| (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') || | |
| (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n"); | |
| return ret; | |
| } | |
| if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n"); | |
| return ret; | |
| } | |
| if ((ret = vorbis_parse_setup_hdr_floors(vc))) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n"); | |
| return ret; | |
| } | |
| if ((ret = vorbis_parse_setup_hdr_residues(vc))) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n"); | |
| return ret; | |
| } | |
| if ((ret = vorbis_parse_setup_hdr_mappings(vc))) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n"); | |
| return ret; | |
| } | |
| if ((ret = vorbis_parse_setup_hdr_modes(vc))) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n"); | |
| return ret; | |
| } | |
| if (!get_bits1(gb)) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n"); | |
| return AVERROR_INVALIDDATA; // framing flag bit unset error | |
| } | |
| return 0; | |
| } | |
| // Process the identification header | |
| static int vorbis_parse_id_hdr(vorbis_context *vc) | |
| { | |
| GetBitContext *gb = &vc->gb; | |
| unsigned bl0, bl1; | |
| float scale = -1.0; | |
| int ret; | |
| if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') || | |
| (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') || | |
| (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| vc->version = get_bits_long(gb, 32); //FIXME check 0 | |
| vc->audio_channels = get_bits(gb, 8); | |
| if (vc->audio_channels <= 0) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| vc->audio_samplerate = get_bits_long(gb, 32); | |
| if (vc->audio_samplerate <= 0) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| vc->bitrate_maximum = get_bits_long(gb, 32); | |
| vc->bitrate_nominal = get_bits_long(gb, 32); | |
| vc->bitrate_minimum = get_bits_long(gb, 32); | |
| bl0 = get_bits(gb, 4); | |
| bl1 = get_bits(gb, 4); | |
| if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| vc->blocksize[0] = (1 << bl0); | |
| vc->blocksize[1] = (1 << bl1); | |
| vc->win[0] = ff_vorbis_vwin[bl0 - 6]; | |
| vc->win[1] = ff_vorbis_vwin[bl1 - 6]; | |
| if ((get_bits1(gb)) == 0) { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| vc->channel_residues = av_malloc_array(vc->blocksize[1] / 2, vc->audio_channels * sizeof(*vc->channel_residues)); | |
| vc->saved = av_calloc(vc->blocksize[1] / 4, vc->audio_channels * sizeof(*vc->saved)); | |
| if (!vc->channel_residues || !vc->saved) | |
| return AVERROR(ENOMEM); | |
| vc->previous_window = -1; | |
| ret = av_tx_init(&vc->mdct[0], &vc->mdct_fn[0], AV_TX_FLOAT_MDCT, 1, | |
| vc->blocksize[0] >> 1, &scale, 0); | |
| if (ret < 0) | |
| return ret; | |
| ret = av_tx_init(&vc->mdct[1], &vc->mdct_fn[1], AV_TX_FLOAT_MDCT, 1, | |
| vc->blocksize[1] >> 1, &scale, 0); | |
| if (ret < 0) | |
| return ret; | |
| vc->fdsp = avpriv_float_dsp_alloc(vc->avctx->flags & AV_CODEC_FLAG_BITEXACT); | |
| if (!vc->fdsp) | |
| return AVERROR(ENOMEM); | |
| ff_dlog(NULL, " vorbis version %"PRIu32" \n audio_channels %"PRIu8" \n audio_samplerate %"PRIu32" \n bitrate_max %"PRIu32" \n bitrate_nom %"PRIu32" \n bitrate_min %"PRIu32" \n blk_0 %"PRIu32" blk_1 %"PRIu32" \n ", | |
| vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]); | |
| /* | |
| BLK = vc->blocksize[0]; | |
| for (i = 0; i < BLK / 2; ++i) { | |
| vc->win[0][i] = sin(0.5*3.14159265358*(sin(((float)i + 0.5) / (float)BLK*3.14159265358))*(sin(((float)i + 0.5) / (float)BLK*3.14159265358))); | |
| } | |
| */ | |
| return 0; | |
| } | |
| // Process the extradata using the functions above (identification header, setup header) | |
| static av_cold int vorbis_decode_init(AVCodecContext *avctx) | |
| { | |
| vorbis_context *vc = avctx->priv_data; | |
| uint8_t *headers = avctx->extradata; | |
| int headers_len = avctx->extradata_size; | |
| const uint8_t *header_start[3]; | |
| int header_len[3]; | |
| GetBitContext *gb = &vc->gb; | |
| int hdr_type, ret; | |
| vc->avctx = avctx; | |
| ff_vorbisdsp_init(&vc->dsp); | |
| avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; | |
| if (!headers_len) { | |
| av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) { | |
| av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n"); | |
| return ret; | |
| } | |
| init_get_bits(gb, header_start[0], header_len[0]*8); | |
| hdr_type = get_bits(gb, 8); | |
| if (hdr_type != 1) { | |
| av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if ((ret = vorbis_parse_id_hdr(vc))) { | |
| av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n"); | |
| vorbis_free(vc); | |
| return ret; | |
| } | |
| init_get_bits(gb, header_start[2], header_len[2]*8); | |
| hdr_type = get_bits(gb, 8); | |
| if (hdr_type != 5) { | |
| av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n"); | |
| vorbis_free(vc); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if ((ret = vorbis_parse_setup_hdr(vc))) { | |
| av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n"); | |
| vorbis_free(vc); | |
| return ret; | |
| } | |
| av_channel_layout_uninit(&avctx->ch_layout); | |
| if (vc->audio_channels > 8) { | |
| avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC; | |
| avctx->ch_layout.nb_channels = vc->audio_channels; | |
| } else { | |
| av_channel_layout_copy(&avctx->ch_layout, &ff_vorbis_ch_layouts[vc->audio_channels - 1]); | |
| } | |
| avctx->sample_rate = vc->audio_samplerate; | |
| return 0; | |
| } | |
| // Decode audiopackets ------------------------------------------------- | |
| // Read and decode floor | |
| static int vorbis_floor0_decode(vorbis_context *vc, | |
| vorbis_floor_data *vfu, float *vec) | |
| { | |
| vorbis_floor0 *vf = &vfu->t0; | |
| float *lsp = vf->lsp; | |
| unsigned book_idx; | |
| uint64_t amplitude; | |
| unsigned blockflag = vc->modes[vc->mode_number].blockflag; | |
| if (!vf->amplitude_bits) | |
| return 1; | |
| amplitude = get_bits64(&vc->gb, vf->amplitude_bits); | |
| if (amplitude > 0) { | |
| float last = 0; | |
| unsigned idx, lsp_len = 0; | |
| vorbis_codebook codebook; | |
| book_idx = get_bits(&vc->gb, ilog(vf->num_books)); | |
| if (book_idx >= vf->num_books) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n"); | |
| book_idx = 0; | |
| } | |
| ff_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx); | |
| codebook = vc->codebooks[vf->book_list[book_idx]]; | |
| /* Invalid codebook! */ | |
| if (!codebook.codevectors) | |
| return AVERROR_INVALIDDATA; | |
| while (lsp_len<vf->order) { | |
| int vec_off; | |
| ff_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions); | |
| ff_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth); | |
| /* read temp vector */ | |
| vec_off = get_vlc2(&vc->gb, codebook.vlc.table, | |
| codebook.nb_bits, codebook.maxdepth); | |
| if (vec_off < 0) | |
| return AVERROR_INVALIDDATA; | |
| vec_off *= codebook.dimensions; | |
| ff_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off); | |
| /* copy each vector component and add last to it */ | |
| for (idx = 0; idx < codebook.dimensions; ++idx) | |
| lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last; | |
| last = lsp[lsp_len+idx-1]; /* set last to last vector component */ | |
| lsp_len += codebook.dimensions; | |
| } | |
| /* DEBUG: output lsp coeffs */ | |
| { | |
| int idx; | |
| for (idx = 0; idx < lsp_len; ++idx) | |
| ff_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]); | |
| } | |
| /* synthesize floor output vector */ | |
| { | |
| int i; | |
| int order = vf->order; | |
| float wstep = M_PI / vf->bark_map_size; | |
| for (i = 0; i < order; i++) | |
| lsp[i] = 2.0f * cos(lsp[i]); | |
| ff_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n", | |
| vf->map_size[blockflag], order, wstep); | |
| i = 0; | |
| while (i < vf->map_size[blockflag]) { | |
| int j, iter_cond = vf->map[blockflag][i]; | |
| float p = 0.5f; | |
| float q = 0.5f; | |
| float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times | |
| /* similar part for the q and p products */ | |
| for (j = 0; j + 1 < order; j += 2) { | |
| q *= lsp[j] - two_cos_w; | |
| p *= lsp[j + 1] - two_cos_w; | |
| } | |
| if (j == order) { // even order | |
| p *= p * (2.0f - two_cos_w); | |
| q *= q * (2.0f + two_cos_w); | |
| } else { // odd order | |
| q *= two_cos_w-lsp[j]; // one more time for q | |
| /* final step and square */ | |
| p *= p * (4.f - two_cos_w * two_cos_w); | |
| q *= q; | |
| } | |
| if (p + q == 0.0) | |
| return AVERROR_INVALIDDATA; | |
| /* calculate linear floor value */ | |
| q = exp((((amplitude*vf->amplitude_offset) / | |
| (((1ULL << vf->amplitude_bits) - 1) * sqrt(p + q))) | |
| - vf->amplitude_offset) * .11512925f); | |
| /* fill vector */ | |
| do { | |
| vec[i] = q; ++i; | |
| } while (vf->map[blockflag][i] == iter_cond); | |
| } | |
| } | |
| } else { | |
| /* this channel is unused */ | |
| return 1; | |
| } | |
| ff_dlog(NULL, " Floor0 decoded\n"); | |
| return 0; | |
| } | |
| static int vorbis_floor1_decode(vorbis_context *vc, | |
| vorbis_floor_data *vfu, float *vec) | |
| { | |
| vorbis_floor1 *vf = &vfu->t1; | |
| GetBitContext *gb = &vc->gb; | |
| uint16_t range_v[4] = { 256, 128, 86, 64 }; | |
| unsigned range = range_v[vf->multiplier - 1]; | |
| uint16_t floor1_Y[258]; | |
| uint16_t floor1_Y_final[258]; | |
| int floor1_flag[258]; | |
| unsigned partition_class, cdim, cbits, csub, cval, offset, i, j; | |
| int book, adx, ady, dy, off, predicted, err; | |
| if (!get_bits1(gb)) // silence | |
| return 1; | |
| // Read values (or differences) for the floor's points | |
| floor1_Y[0] = get_bits(gb, ilog(range - 1)); | |
| floor1_Y[1] = get_bits(gb, ilog(range - 1)); | |
| ff_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]); | |
| offset = 2; | |
| for (i = 0; i < vf->partitions; ++i) { | |
| partition_class = vf->partition_class[i]; | |
| cdim = vf->class_dimensions[partition_class]; | |
| cbits = vf->class_subclasses[partition_class]; | |
| csub = (1 << cbits) - 1; | |
| cval = 0; | |
| ff_dlog(NULL, "Cbits %u\n", cbits); | |
| if (cbits) // this reads all subclasses for this partition's class | |
| cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table, | |
| vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3); | |
| for (j = 0; j < cdim; ++j) { | |
| book = vf->subclass_books[partition_class][cval & csub]; | |
| ff_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n", | |
| book, cbits, cval, get_bits_count(gb)); | |
| cval = cval >> cbits; | |
| if (book > -1) { | |
| int v = get_vlc2(gb, vc->codebooks[book].vlc.table, | |
| vc->codebooks[book].nb_bits, 3); | |
| if (v < 0) | |
| return AVERROR_INVALIDDATA; | |
| floor1_Y[offset+j] = v; | |
| } else { | |
| floor1_Y[offset+j] = 0; | |
| } | |
| ff_dlog(NULL, " floor(%d) = %d \n", | |
| vf->list[offset+j].x, floor1_Y[offset+j]); | |
| } | |
| offset+=cdim; | |
| } | |
| // Amplitude calculation from the differences | |
| floor1_flag[0] = 1; | |
| floor1_flag[1] = 1; | |
| floor1_Y_final[0] = floor1_Y[0]; | |
| floor1_Y_final[1] = floor1_Y[1]; | |
| for (i = 2; i < vf->x_list_dim; ++i) { | |
| unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs; | |
| low_neigh_offs = vf->list[i].low; | |
| high_neigh_offs = vf->list[i].high; | |
| dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin | |
| adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x; | |
| ady = FFABS(dy); | |
| err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x); | |
| off = err / adx; | |
| if (dy < 0) { | |
| predicted = floor1_Y_final[low_neigh_offs] - off; | |
| } else { | |
| predicted = floor1_Y_final[low_neigh_offs] + off; | |
| } // render_point end | |
| val = floor1_Y[i]; | |
| highroom = range-predicted; | |
| lowroom = predicted; | |
| if (highroom < lowroom) { | |
| room = highroom * 2; | |
| } else { | |
| room = lowroom * 2; // SPEC misspelling | |
| } | |
| if (val) { | |
| floor1_flag[low_neigh_offs] = 1; | |
| floor1_flag[high_neigh_offs] = 1; | |
| floor1_flag[i] = 1; | |
| if (val >= room) { | |
| if (highroom > lowroom) { | |
| floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted); | |
| } else { | |
| floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1); | |
| } | |
| } else { | |
| if (val & 1) { | |
| floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2); | |
| } else { | |
| floor1_Y_final[i] = av_clip_uint16(predicted + val / 2); | |
| } | |
| } | |
| } else { | |
| floor1_flag[i] = 0; | |
| floor1_Y_final[i] = av_clip_uint16(predicted); | |
| } | |
| ff_dlog(NULL, " Decoded floor(%d) = %u / val %u\n", | |
| vf->list[i].x, floor1_Y_final[i], val); | |
| } | |
| // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ? | |
| ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x); | |
| ff_dlog(NULL, " Floor decoded\n"); | |
| return 0; | |
| } | |
| static av_always_inline int setup_classifs(vorbis_context *vc, | |
| vorbis_residue *vr, | |
| uint8_t *do_not_decode, | |
| unsigned ch_used, | |
| int partition_count, | |
| int ptns_to_read | |
| ) | |
| { | |
| vorbis_codebook *codebook = vc->codebooks + vr->classbook; | |
| int p, j, i; | |
| unsigned c_p_c = codebook->dimensions; | |
| unsigned inverse_class = ff_inverse[vr->classifications]; | |
| int temp, temp2; | |
| for (p = 0, j = 0; j < ch_used; ++j) { | |
| if (!do_not_decode[j]) { | |
| temp = get_vlc2(&vc->gb, codebook->vlc.table, | |
| codebook->nb_bits, 3); | |
| ff_dlog(NULL, "Classword: %u\n", temp); | |
| av_assert0(temp < 65536); | |
| if (temp < 0) { | |
| av_log(vc->avctx, AV_LOG_ERROR, | |
| "Invalid vlc code decoding %d channel.", j); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if (vr->classifications == 1) { | |
| for (i = partition_count + c_p_c - 1; i >= partition_count; i--) { | |
| if (i < ptns_to_read) | |
| vr->classifs[p + i] = 0; | |
| } | |
| } else { | |
| for (i = partition_count + c_p_c - 1; i >= partition_count; i--) { | |
| temp2 = (((uint64_t)temp) * inverse_class) >> 32; | |
| if (i < ptns_to_read) | |
| vr->classifs[p + i] = temp - temp2 * vr->classifications; | |
| temp = temp2; | |
| } | |
| } | |
| } | |
| p += ptns_to_read; | |
| } | |
| return 0; | |
| } | |
| // Read and decode residue | |
| static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc, | |
| vorbis_residue *vr, | |
| unsigned ch, | |
| uint8_t *do_not_decode, | |
| float *vec, | |
| unsigned vlen, | |
| unsigned ch_left, | |
| int vr_type) | |
| { | |
| GetBitContext *gb = &vc->gb; | |
| unsigned c_p_c = vc->codebooks[vr->classbook].dimensions; | |
| uint8_t *classifs = vr->classifs; | |
| unsigned pass, ch_used, i, j, k, l; | |
| unsigned max_output = (ch - 1) * vlen; | |
| int ptns_to_read = vr->ptns_to_read; | |
| int libvorbis_bug = 0; | |
| if (vr_type == 2) { | |
| for (j = 1; j < ch; ++j) | |
| do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input | |
| if (do_not_decode[0]) | |
| return 0; | |
| ch_used = 1; | |
| max_output += vr->end / ch; | |
| } else { | |
| ch_used = ch; | |
| max_output += vr->end; | |
| } | |
| if (max_output > ch_left * vlen) { | |
| if (max_output <= ch_left * vlen + vr->partition_size*ch_used/ch) { | |
| ptns_to_read--; | |
| libvorbis_bug = 1; | |
| } else { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| } | |
| ff_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c); | |
| for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE? | |
| int voffset, partition_count, j_times_ptns_to_read; | |
| voffset = vr->begin; | |
| for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error | |
| if (!pass) { | |
| int ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count, ptns_to_read); | |
| if (ret < 0) | |
| return ret; | |
| } | |
| for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) { | |
| for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) { | |
| unsigned voffs; | |
| if (!do_not_decode[j]) { | |
| unsigned vqclass = classifs[j_times_ptns_to_read + partition_count]; | |
| int vqbook = vr->books[vqclass][pass]; | |
| if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) { | |
| int coffs; | |
| unsigned dim = vc->codebooks[vqbook].dimensions; | |
| unsigned step = FASTDIV(vr->partition_size << 1, dim << 1); | |
| vorbis_codebook codebook = vc->codebooks[vqbook]; | |
| if (get_bits_left(gb) < 0) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Overread %d bits\n", -get_bits_left(gb)); | |
| return 0; | |
| } | |
| if (vr_type == 0) { | |
| voffs = voffset+j*vlen; | |
| for (k = 0; k < step; ++k) { | |
| coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3); | |
| if (coffs < 0) | |
| return coffs; | |
| coffs *= dim; | |
| for (l = 0; l < dim; ++l) | |
| vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; | |
| } | |
| } else if (vr_type == 1) { | |
| voffs = voffset + j * vlen; | |
| for (k = 0; k < step; ++k) { | |
| coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3); | |
| if (coffs < 0) | |
| return coffs; | |
| coffs *= dim; | |
| for (l = 0; l < dim; ++l, ++voffs) { | |
| vec[voffs]+=codebook.codevectors[coffs+l]; | |
| ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n", | |
| pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs); | |
| } | |
| } | |
| } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized | |
| voffs = voffset >> 1; | |
| if (dim == 2) { | |
| for (k = 0; k < step; ++k) { | |
| coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3); | |
| if (coffs < 0) | |
| return coffs; | |
| coffs *= 2; | |
| vec[voffs + k ] += codebook.codevectors[coffs ]; | |
| vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; | |
| } | |
| } else if (dim == 4) { | |
| for (k = 0; k < step; ++k, voffs += 2) { | |
| coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3); | |
| if (coffs < 0) | |
| return coffs; | |
| coffs *= 4; | |
| vec[voffs ] += codebook.codevectors[coffs ]; | |
| vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; | |
| vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; | |
| vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; | |
| } | |
| } else | |
| for (k = 0; k < step; ++k) { | |
| coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3); | |
| if (coffs < 0) | |
| return coffs; | |
| coffs *= dim; | |
| for (l = 0; l < dim; l += 2, voffs++) { | |
| vec[voffs ] += codebook.codevectors[coffs + l ]; | |
| vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; | |
| ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", | |
| pass, voffset / ch + (voffs % ch) * vlen, | |
| vec[voffset / ch + (voffs % ch) * vlen], | |
| codebook.codevectors[coffs + l], coffs, l); | |
| } | |
| } | |
| } else if (vr_type == 2) { | |
| unsigned voffs_div = ch == 1 ? voffset : FASTDIV(voffset, ch); | |
| unsigned voffs_mod = voffset - voffs_div * ch; | |
| for (k = 0; k < step; ++k) { | |
| coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3); | |
| if (coffs < 0) | |
| return coffs; | |
| coffs *= dim; | |
| for (l = 0; l < dim; ++l) { | |
| vec[voffs_div + voffs_mod * vlen] += | |
| codebook.codevectors[coffs + l]; | |
| ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", | |
| pass, voffs_div + voffs_mod * vlen, | |
| vec[voffs_div + voffs_mod * vlen], | |
| codebook.codevectors[coffs + l], coffs, l); | |
| if (++voffs_mod == ch) { | |
| voffs_div++; | |
| voffs_mod = 0; | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| j_times_ptns_to_read += ptns_to_read; | |
| } | |
| ++partition_count; | |
| voffset += vr->partition_size; | |
| } | |
| } | |
| if (libvorbis_bug && !pass) { | |
| for (j = 0; j < ch_used; ++j) { | |
| if (!do_not_decode[j]) { | |
| get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table, | |
| vc->codebooks[vr->classbook].nb_bits, 3); | |
| } | |
| } | |
| } | |
| } | |
| return 0; | |
| } | |
| static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr, | |
| unsigned ch, | |
| uint8_t *do_not_decode, | |
| float *vec, unsigned vlen, | |
| unsigned ch_left) | |
| { | |
| if (vr->type == 2) | |
| return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2); | |
| else if (vr->type == 1) | |
| return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1); | |
| else if (vr->type == 0) | |
| return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0); | |
| else { | |
| av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| } | |
| // Decode the audio packet using the functions above | |
| static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr) | |
| { | |
| GetBitContext *gb = &vc->gb; | |
| AVTXContext *mdct; | |
| av_tx_fn mdct_fn; | |
| int previous_window = vc->previous_window; | |
| unsigned mode_number, blockflag, blocksize; | |
| int i, j; | |
| uint8_t no_residue[255]; | |
| uint8_t do_not_decode[255]; | |
| vorbis_mapping *mapping; | |
| float *ch_res_ptr = vc->channel_residues; | |
| uint8_t res_chan[255]; | |
| unsigned res_num = 0; | |
| int retlen = 0; | |
| unsigned ch_left = vc->audio_channels; | |
| unsigned vlen; | |
| if (get_bits1(gb)) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n"); | |
| return AVERROR_INVALIDDATA; // packet type not audio | |
| } | |
| if (vc->mode_count == 1) { | |
| mode_number = 0; | |
| } else { | |
| GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count) | |
| } | |
| vc->mode_number = mode_number; | |
| mapping = &vc->mappings[vc->modes[mode_number].mapping]; | |
| ff_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number, | |
| vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag); | |
| blockflag = vc->modes[mode_number].blockflag; | |
| blocksize = vc->blocksize[blockflag]; | |
| vlen = blocksize / 2; | |
| if (blockflag) { | |
| int code = get_bits(gb, 2); | |
| if (previous_window < 0) | |
| previous_window = code>>1; | |
| } else if (previous_window < 0) | |
| previous_window = 0; | |
| memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ? | |
| for (i = 0; i < vc->audio_channels; ++i) | |
| memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ? | |
| // Decode floor | |
| for (i = 0; i < vc->audio_channels; ++i) { | |
| vorbis_floor *floor; | |
| int ret; | |
| if (mapping->submaps > 1) { | |
| floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]]; | |
| } else { | |
| floor = &vc->floors[mapping->submap_floor[0]]; | |
| } | |
| ret = floor->decode(vc, &floor->data, floor_ptr[i]); | |
| if (ret < 0) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| no_residue[i] = ret; | |
| } | |
| // Nonzero vector propagate | |
| for (i = mapping->coupling_steps - 1; i >= 0; --i) { | |
| if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) { | |
| no_residue[mapping->magnitude[i]] = 0; | |
| no_residue[mapping->angle[i]] = 0; | |
| } | |
| } | |
| // Decode residue | |
| for (i = 0; i < mapping->submaps; ++i) { | |
| vorbis_residue *residue; | |
| unsigned ch = 0; | |
| int ret; | |
| for (j = 0; j < vc->audio_channels; ++j) { | |
| if ((mapping->submaps == 1) || (i == mapping->mux[j])) { | |
| res_chan[j] = res_num; | |
| if (no_residue[j]) { | |
| do_not_decode[ch] = 1; | |
| } else { | |
| do_not_decode[ch] = 0; | |
| } | |
| ++ch; | |
| ++res_num; | |
| } | |
| } | |
| residue = &vc->residues[mapping->submap_residue[i]]; | |
| if (ch_left < ch) { | |
| av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| if (ch) { | |
| ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left); | |
| if (ret < 0) | |
| return ret; | |
| } | |
| ch_res_ptr += ch * vlen; | |
| ch_left -= ch; | |
| } | |
| if (ch_left > 0) | |
| return AVERROR_INVALIDDATA; | |
| // Inverse coupling | |
| for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed | |
| float *mag, *ang; | |
| mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2; | |
| ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2; | |
| vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2); | |
| } | |
| // Dotproduct, MDCT | |
| mdct = vc->mdct[blockflag]; | |
| mdct_fn = vc->mdct_fn[blockflag]; | |
| for (j = vc->audio_channels-1;j >= 0; j--) { | |
| ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2; | |
| vc->fdsp->vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2); | |
| mdct_fn(mdct, ch_res_ptr, floor_ptr[j], sizeof(float)); | |
| } | |
| // Overlap/add, save data for next overlapping | |
| retlen = (blocksize + vc->blocksize[previous_window]) / 4; | |
| for (j = 0; j < vc->audio_channels; j++) { | |
| unsigned bs0 = vc->blocksize[0]; | |
| unsigned bs1 = vc->blocksize[1]; | |
| float *residue = vc->channel_residues + res_chan[j] * blocksize / 2; | |
| float *saved = vc->saved + j * bs1 / 4; | |
| float *ret = floor_ptr[j]; | |
| float *buf = residue; | |
| const float *win = vc->win[blockflag & previous_window]; | |
| if (blockflag == previous_window) { | |
| vc->fdsp->vector_fmul_window(ret, saved, buf, win, blocksize / 4); | |
| } else if (blockflag > previous_window) { | |
| vc->fdsp->vector_fmul_window(ret, saved, buf, win, bs0 / 4); | |
| memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float)); | |
| } else { | |
| memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float)); | |
| vc->fdsp->vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4); | |
| } | |
| memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float)); | |
| } | |
| vc->previous_window = blockflag; | |
| return retlen; | |
| } | |
| // Return the decoded audio packet through the standard api | |
| static int vorbis_decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
| int *got_frame_ptr, AVPacket *avpkt) | |
| { | |
| const uint8_t *buf = avpkt->data; | |
| int buf_size = avpkt->size; | |
| vorbis_context *vc = avctx->priv_data; | |
| GetBitContext *gb = &vc->gb; | |
| float *channel_ptrs[255]; | |
| int i, len, ret; | |
| ff_dlog(NULL, "packet length %d \n", buf_size); | |
| if (*buf == 1 && buf_size > 7) { | |
| if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0) | |
| return ret; | |
| vorbis_free(vc); | |
| if ((ret = vorbis_parse_id_hdr(vc))) { | |
| av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n"); | |
| vorbis_free(vc); | |
| return ret; | |
| } | |
| av_channel_layout_uninit(&avctx->ch_layout); | |
| if (vc->audio_channels > 8) { | |
| avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC; | |
| avctx->ch_layout.nb_channels = vc->audio_channels; | |
| } else { | |
| av_channel_layout_copy(&avctx->ch_layout, &ff_vorbis_ch_layouts[vc->audio_channels - 1]); | |
| } | |
| avctx->sample_rate = vc->audio_samplerate; | |
| return buf_size; | |
| } | |
| if (*buf == 3 && buf_size > 7) { | |
| av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n"); | |
| return buf_size; | |
| } | |
| if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) { | |
| if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0) | |
| return ret; | |
| if ((ret = vorbis_parse_setup_hdr(vc))) { | |
| av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n"); | |
| vorbis_free(vc); | |
| return ret; | |
| } | |
| return buf_size; | |
| } | |
| if (!vc->channel_residues || !vc->modes) { | |
| av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n"); | |
| return AVERROR_INVALIDDATA; | |
| } | |
| /* get output buffer */ | |
| frame->nb_samples = vc->blocksize[1] / 2; | |
| if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) | |
| return ret; | |
| if (vc->audio_channels > 8) { | |
| for (i = 0; i < vc->audio_channels; i++) | |
| channel_ptrs[i] = (float *)frame->extended_data[i]; | |
| } else { | |
| for (i = 0; i < vc->audio_channels; i++) { | |
| int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i]; | |
| channel_ptrs[ch] = (float *)frame->extended_data[i]; | |
| } | |
| } | |
| if ((ret = init_get_bits8(gb, buf, buf_size)) < 0) | |
| return ret; | |
| if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0) | |
| return len; | |
| if (!vc->first_frame) { | |
| vc->first_frame = 1; | |
| avctx->internal->skip_samples = len; | |
| } | |
| ff_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", | |
| get_bits_count(gb) / 8, get_bits_count(gb) % 8, len); | |
| frame->nb_samples = len; | |
| *got_frame_ptr = 1; | |
| return buf_size; | |
| } | |
| // Close decoder | |
| static av_cold int vorbis_decode_close(AVCodecContext *avctx) | |
| { | |
| vorbis_context *vc = avctx->priv_data; | |
| vorbis_free(vc); | |
| return 0; | |
| } | |
| static av_cold void vorbis_decode_flush(AVCodecContext *avctx) | |
| { | |
| vorbis_context *vc = avctx->priv_data; | |
| if (vc->saved) { | |
| memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels * | |
| sizeof(*vc->saved)); | |
| } | |
| vc->previous_window = -1; | |
| vc->first_frame = 0; | |
| } | |
| const FFCodec ff_vorbis_decoder = { | |
| .p.name = "vorbis", | |
| CODEC_LONG_NAME("Vorbis"), | |
| .p.type = AVMEDIA_TYPE_AUDIO, | |
| .p.id = AV_CODEC_ID_VORBIS, | |
| .priv_data_size = sizeof(vorbis_context), | |
| .init = vorbis_decode_init, | |
| .close = vorbis_decode_close, | |
| FF_CODEC_DECODE_CB(vorbis_decode_frame), | |
| .flush = vorbis_decode_flush, | |
| .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF, | |
| .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, | |
| .p.ch_layouts = ff_vorbis_ch_layouts, | |
| .p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, | |
| AV_SAMPLE_FMT_NONE }, | |
| }; |