| /** |
| * @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" |
| |
| #define BITSTREAM_READER_LE |
| #include "avcodec.h" |
| #include "fft.h" |
| #include "get_bits.h" |
| #include "internal.h" |
| #include "vorbis.h" |
| #include "vorbisdsp.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; |
| |
| FFTContext mdct[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); |
| |
| ff_mdct_end(&vc->mdct[0]); |
| ff_mdct_end(&vc->mdct[1]); |
| |
| if (vc->codebooks) |
| for (i = 0; i < vc->codebook_count; ++i) { |
| av_freep(&vc->codebooks[i].codevectors); |
| ff_free_vlc(&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); |
| |
| 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_mallocz_array(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 = init_vlc(&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), |
| INIT_VLC_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_mallocz_array(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_mallocz_array(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; |
| |
| 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_mallocz_array(vc->blocksize[1] / 4, vc->audio_channels * sizeof(*vc->saved)); |
| if (!vc->channel_residues || !vc->saved) |
| return AVERROR(ENOMEM); |
| |
| vc->previous_window = -1; |
| |
| ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0); |
| ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0); |
| 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; |
| } |
| |
| if (vc->audio_channels > 8) |
| avctx->channel_layout = 0; |
| else |
| avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1]; |
| |
| avctx->channels = vc->audio_channels; |
| 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 (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; |
| } |
| } |
| |
| void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize) |
| { |
| int i; |
| for (i = 0; i < blocksize; i++) { |
| if (mag[i] > 0.0) { |
| if (ang[i] > 0.0) { |
| ang[i] = mag[i] - ang[i]; |
| } else { |
| float temp = ang[i]; |
| ang[i] = mag[i]; |
| mag[i] += temp; |
| } |
| } else { |
| if (ang[i] > 0.0) { |
| ang[i] += mag[i]; |
| } else { |
| float temp = ang[i]; |
| ang[i] = mag[i]; |
| mag[i] -= temp; |
| } |
| } |
| } |
| } |
| |
| // Decode the audio packet using the functions above |
| |
| static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr) |
| { |
| GetBitContext *gb = &vc->gb; |
| FFTContext *mdct; |
| 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]; |
| |
| 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->imdct_half(mdct, ch_res_ptr, floor_ptr[j]); |
| } |
| |
| // 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, void *data, |
| int *got_frame_ptr, AVPacket *avpkt) |
| { |
| const uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| vorbis_context *vc = avctx->priv_data; |
| AVFrame *frame = 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; |
| } |
| |
| if (vc->audio_channels > 8) |
| avctx->channel_layout = 0; |
| else |
| avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1]; |
| |
| avctx->channels = vc->audio_channels; |
| 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; |
| *got_frame_ptr = 0; |
| av_frame_unref(frame); |
| return buf_size; |
| } |
| |
| 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; |
| } |
| |
| AVCodec ff_vorbis_decoder = { |
| .name = "vorbis", |
| .long_name = NULL_IF_CONFIG_SMALL("Vorbis"), |
| .type = AVMEDIA_TYPE_AUDIO, |
| .id = AV_CODEC_ID_VORBIS, |
| .priv_data_size = sizeof(vorbis_context), |
| .init = vorbis_decode_init, |
| .close = vorbis_decode_close, |
| .decode = vorbis_decode_frame, |
| .flush = vorbis_decode_flush, |
| .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF, |
| .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
| .channel_layouts = ff_vorbis_channel_layouts, |
| .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
| AV_SAMPLE_FMT_NONE }, |
| }; |
