yading@10: /** yading@10: * @file yading@10: * Vorbis I decoder yading@10: * @author Denes Balatoni ( dbalatoni programozo hu ) yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * Vorbis I decoder yading@10: * @author Denes Balatoni ( dbalatoni programozo hu ) yading@10: */ yading@10: yading@10: #include yading@10: #include yading@10: yading@10: #define BITSTREAM_READER_LE yading@10: #include "libavutil/float_dsp.h" yading@10: #include "libavutil/avassert.h" yading@10: #include "avcodec.h" yading@10: #include "get_bits.h" yading@10: #include "fft.h" yading@10: #include "fmtconvert.h" yading@10: #include "internal.h" yading@10: yading@10: #include "vorbis.h" yading@10: #include "vorbisdsp.h" yading@10: #include "xiph.h" yading@10: yading@10: #define V_NB_BITS 8 yading@10: #define V_NB_BITS2 11 yading@10: #define V_MAX_VLCS (1 << 16) yading@10: #define V_MAX_PARTITIONS (1 << 20) yading@10: yading@10: typedef struct { yading@10: uint8_t dimensions; yading@10: uint8_t lookup_type; yading@10: uint8_t maxdepth; yading@10: VLC vlc; yading@10: float *codevectors; yading@10: unsigned int nb_bits; yading@10: } vorbis_codebook; yading@10: yading@10: typedef union vorbis_floor_u vorbis_floor_data; yading@10: typedef struct vorbis_floor0_s vorbis_floor0; yading@10: typedef struct vorbis_floor1_s vorbis_floor1; yading@10: struct vorbis_context_s; yading@10: typedef yading@10: int (* vorbis_floor_decode_func) yading@10: (struct vorbis_context_s *, vorbis_floor_data *, float *); yading@10: typedef struct { yading@10: uint8_t floor_type; yading@10: vorbis_floor_decode_func decode; yading@10: union vorbis_floor_u { yading@10: struct vorbis_floor0_s { yading@10: uint8_t order; yading@10: uint16_t rate; yading@10: uint16_t bark_map_size; yading@10: int32_t *map[2]; yading@10: uint32_t map_size[2]; yading@10: uint8_t amplitude_bits; yading@10: uint8_t amplitude_offset; yading@10: uint8_t num_books; yading@10: uint8_t *book_list; yading@10: float *lsp; yading@10: } t0; yading@10: struct vorbis_floor1_s { yading@10: uint8_t partitions; yading@10: uint8_t partition_class[32]; yading@10: uint8_t class_dimensions[16]; yading@10: uint8_t class_subclasses[16]; yading@10: uint8_t class_masterbook[16]; yading@10: int16_t subclass_books[16][8]; yading@10: uint8_t multiplier; yading@10: uint16_t x_list_dim; yading@10: vorbis_floor1_entry *list; yading@10: } t1; yading@10: } data; yading@10: } vorbis_floor; yading@10: yading@10: typedef struct { yading@10: uint16_t type; yading@10: uint32_t begin; yading@10: uint32_t end; yading@10: unsigned partition_size; yading@10: uint8_t classifications; yading@10: uint8_t classbook; yading@10: int16_t books[64][8]; yading@10: uint8_t maxpass; yading@10: uint16_t ptns_to_read; yading@10: uint8_t *classifs; yading@10: } vorbis_residue; yading@10: yading@10: typedef struct { yading@10: uint8_t submaps; yading@10: uint16_t coupling_steps; yading@10: uint8_t *magnitude; yading@10: uint8_t *angle; yading@10: uint8_t *mux; yading@10: uint8_t submap_floor[16]; yading@10: uint8_t submap_residue[16]; yading@10: } vorbis_mapping; yading@10: yading@10: typedef struct { yading@10: uint8_t blockflag; yading@10: uint16_t windowtype; yading@10: uint16_t transformtype; yading@10: uint8_t mapping; yading@10: } vorbis_mode; yading@10: yading@10: typedef struct vorbis_context_s { yading@10: AVCodecContext *avctx; yading@10: GetBitContext gb; yading@10: VorbisDSPContext dsp; yading@10: AVFloatDSPContext fdsp; yading@10: FmtConvertContext fmt_conv; yading@10: yading@10: FFTContext mdct[2]; yading@10: uint8_t first_frame; yading@10: uint32_t version; yading@10: uint8_t audio_channels; yading@10: uint32_t audio_samplerate; yading@10: uint32_t bitrate_maximum; yading@10: uint32_t bitrate_nominal; yading@10: uint32_t bitrate_minimum; yading@10: uint32_t blocksize[2]; yading@10: const float *win[2]; yading@10: uint16_t codebook_count; yading@10: vorbis_codebook *codebooks; yading@10: uint8_t floor_count; yading@10: vorbis_floor *floors; yading@10: uint8_t residue_count; yading@10: vorbis_residue *residues; yading@10: uint8_t mapping_count; yading@10: vorbis_mapping *mappings; yading@10: uint8_t mode_count; yading@10: vorbis_mode *modes; yading@10: uint8_t mode_number; // mode number for the current packet yading@10: uint8_t previous_window; yading@10: float *channel_residues; yading@10: float *saved; yading@10: } vorbis_context; yading@10: yading@10: /* Helper functions */ yading@10: yading@10: #define BARK(x) \ yading@10: (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x)) yading@10: yading@10: static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n"; yading@10: #define VALIDATE_INDEX(idx, limit) \ yading@10: if (idx >= limit) {\ yading@10: av_log(vc->avctx, AV_LOG_ERROR,\ yading@10: idx_err_str,\ yading@10: (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\ yading@10: return AVERROR_INVALIDDATA;\ yading@10: } yading@10: #define GET_VALIDATED_INDEX(idx, bits, limit) \ yading@10: {\ yading@10: idx = get_bits(gb, bits);\ yading@10: VALIDATE_INDEX(idx, limit)\ yading@10: } yading@10: yading@10: static float vorbisfloat2float(unsigned val) yading@10: { yading@10: double mant = val & 0x1fffff; yading@10: long exp = (val & 0x7fe00000L) >> 21; yading@10: if (val & 0x80000000) yading@10: mant = -mant; yading@10: return ldexp(mant, exp - 20 - 768); yading@10: } yading@10: yading@10: yading@10: // Free all allocated memory ----------------------------------------- yading@10: yading@10: static void vorbis_free(vorbis_context *vc) yading@10: { yading@10: int i; yading@10: yading@10: av_freep(&vc->channel_residues); yading@10: av_freep(&vc->saved); yading@10: yading@10: if (vc->residues) yading@10: for (i = 0; i < vc->residue_count; i++) yading@10: av_free(vc->residues[i].classifs); yading@10: av_freep(&vc->residues); yading@10: av_freep(&vc->modes); yading@10: yading@10: ff_mdct_end(&vc->mdct[0]); yading@10: ff_mdct_end(&vc->mdct[1]); yading@10: yading@10: if (vc->codebooks) yading@10: for (i = 0; i < vc->codebook_count; ++i) { yading@10: av_free(vc->codebooks[i].codevectors); yading@10: ff_free_vlc(&vc->codebooks[i].vlc); yading@10: } yading@10: av_freep(&vc->codebooks); yading@10: yading@10: if (vc->floors) yading@10: for (i = 0; i < vc->floor_count; ++i) { yading@10: if (vc->floors[i].floor_type == 0) { yading@10: av_free(vc->floors[i].data.t0.map[0]); yading@10: av_free(vc->floors[i].data.t0.map[1]); yading@10: av_free(vc->floors[i].data.t0.book_list); yading@10: av_free(vc->floors[i].data.t0.lsp); yading@10: } else { yading@10: av_free(vc->floors[i].data.t1.list); yading@10: } yading@10: } yading@10: av_freep(&vc->floors); yading@10: yading@10: if (vc->mappings) yading@10: for (i = 0; i < vc->mapping_count; ++i) { yading@10: av_free(vc->mappings[i].magnitude); yading@10: av_free(vc->mappings[i].angle); yading@10: av_free(vc->mappings[i].mux); yading@10: } yading@10: av_freep(&vc->mappings); yading@10: } yading@10: yading@10: // Parse setup header ------------------------------------------------- yading@10: yading@10: // Process codebooks part yading@10: yading@10: static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) yading@10: { yading@10: unsigned cb; yading@10: uint8_t *tmp_vlc_bits = NULL; yading@10: uint32_t *tmp_vlc_codes = NULL; yading@10: GetBitContext *gb = &vc->gb; yading@10: uint16_t *codebook_multiplicands = NULL; yading@10: int ret = 0; yading@10: yading@10: vc->codebook_count = get_bits(gb, 8) + 1; yading@10: yading@10: av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count); yading@10: yading@10: vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks)); yading@10: tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits)); yading@10: tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes)); yading@10: codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands)); yading@10: if (!vc->codebooks || yading@10: !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) { yading@10: ret = AVERROR(ENOMEM); yading@10: goto error; yading@10: } yading@10: yading@10: for (cb = 0; cb < vc->codebook_count; ++cb) { yading@10: vorbis_codebook *codebook_setup = &vc->codebooks[cb]; yading@10: unsigned ordered, t, entries, used_entries = 0; yading@10: yading@10: av_dlog(NULL, " %u. Codebook\n", cb); yading@10: yading@10: if (get_bits(gb, 24) != 0x564342) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, yading@10: " %u. Codebook setup data corrupt.\n", cb); yading@10: ret = AVERROR_INVALIDDATA; yading@10: goto error; yading@10: } yading@10: yading@10: codebook_setup->dimensions=get_bits(gb, 16); yading@10: if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, yading@10: " %u. Codebook's dimension is invalid (%d).\n", yading@10: cb, codebook_setup->dimensions); yading@10: ret = AVERROR_INVALIDDATA; yading@10: goto error; yading@10: } yading@10: entries = get_bits(gb, 24); yading@10: if (entries > V_MAX_VLCS) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, yading@10: " %u. Codebook has too many entries (%u).\n", yading@10: cb, entries); yading@10: ret = AVERROR_INVALIDDATA; yading@10: goto error; yading@10: } yading@10: yading@10: ordered = get_bits1(gb); yading@10: yading@10: av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n", yading@10: codebook_setup->dimensions, entries); yading@10: yading@10: if (!ordered) { yading@10: unsigned ce, flag; yading@10: unsigned sparse = get_bits1(gb); yading@10: yading@10: av_dlog(NULL, " not ordered \n"); yading@10: yading@10: if (sparse) { yading@10: av_dlog(NULL, " sparse \n"); yading@10: yading@10: used_entries = 0; yading@10: for (ce = 0; ce < entries; ++ce) { yading@10: flag = get_bits1(gb); yading@10: if (flag) { yading@10: tmp_vlc_bits[ce] = get_bits(gb, 5) + 1; yading@10: ++used_entries; yading@10: } else yading@10: tmp_vlc_bits[ce] = 0; yading@10: } yading@10: } else { yading@10: av_dlog(NULL, " not sparse \n"); yading@10: yading@10: used_entries = entries; yading@10: for (ce = 0; ce < entries; ++ce) yading@10: tmp_vlc_bits[ce] = get_bits(gb, 5) + 1; yading@10: } yading@10: } else { yading@10: unsigned current_entry = 0; yading@10: unsigned current_length = get_bits(gb, 5) + 1; yading@10: yading@10: av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME yading@10: yading@10: used_entries = entries; yading@10: for (; current_entry < used_entries && current_length <= 32; ++current_length) { yading@10: unsigned i, number; yading@10: yading@10: av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry)); yading@10: yading@10: number = get_bits(gb, ilog(entries - current_entry)); yading@10: yading@10: av_dlog(NULL, " number: %u\n", number); yading@10: yading@10: for (i = current_entry; i < number+current_entry; ++i) yading@10: if (i < used_entries) yading@10: tmp_vlc_bits[i] = current_length; yading@10: yading@10: current_entry+=number; yading@10: } yading@10: if (current_entry>used_entries) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " More codelengths than codes in codebook. \n"); yading@10: ret = AVERROR_INVALIDDATA; yading@10: goto error; yading@10: } yading@10: } yading@10: yading@10: codebook_setup->lookup_type = get_bits(gb, 4); yading@10: yading@10: av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type, yading@10: codebook_setup->lookup_type ? "vq" : "no lookup"); yading@10: yading@10: // If the codebook is used for (inverse) VQ, calculate codevectors. yading@10: yading@10: if (codebook_setup->lookup_type == 1) { yading@10: unsigned i, j, k; yading@10: unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions); yading@10: yading@10: float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32)); yading@10: float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32)); yading@10: unsigned codebook_value_bits = get_bits(gb, 4) + 1; yading@10: unsigned codebook_sequence_p = get_bits1(gb); yading@10: yading@10: av_dlog(NULL, " We expect %d numbers for building the codevectors. \n", yading@10: codebook_lookup_values); yading@10: av_dlog(NULL, " delta %f minmum %f \n", yading@10: codebook_delta_value, codebook_minimum_value); yading@10: yading@10: for (i = 0; i < codebook_lookup_values; ++i) { yading@10: codebook_multiplicands[i] = get_bits(gb, codebook_value_bits); yading@10: yading@10: av_dlog(NULL, " multiplicands*delta+minmum : %e \n", yading@10: (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value); yading@10: av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]); yading@10: } yading@10: yading@10: // Weed out unused vlcs and build codevector vector yading@10: codebook_setup->codevectors = used_entries ? av_mallocz(used_entries * yading@10: codebook_setup->dimensions * yading@10: sizeof(*codebook_setup->codevectors)) yading@10: : NULL; yading@10: for (j = 0, i = 0; i < entries; ++i) { yading@10: unsigned dim = codebook_setup->dimensions; yading@10: yading@10: if (tmp_vlc_bits[i]) { yading@10: float last = 0.0; yading@10: unsigned lookup_offset = i; yading@10: yading@10: av_dlog(vc->avctx, "Lookup offset %u ,", i); yading@10: yading@10: for (k = 0; k < dim; ++k) { yading@10: unsigned multiplicand_offset = lookup_offset % codebook_lookup_values; yading@10: codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last; yading@10: if (codebook_sequence_p) yading@10: last = codebook_setup->codevectors[j * dim + k]; yading@10: lookup_offset/=codebook_lookup_values; yading@10: } yading@10: tmp_vlc_bits[j] = tmp_vlc_bits[i]; yading@10: yading@10: av_dlog(vc->avctx, "real lookup offset %u, vector: ", j); yading@10: for (k = 0; k < dim; ++k) yading@10: av_dlog(vc->avctx, " %f ", yading@10: codebook_setup->codevectors[j * dim + k]); yading@10: av_dlog(vc->avctx, "\n"); yading@10: yading@10: ++j; yading@10: } yading@10: } yading@10: if (j != used_entries) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n"); yading@10: ret = AVERROR_INVALIDDATA; yading@10: goto error; yading@10: } yading@10: entries = used_entries; yading@10: } else if (codebook_setup->lookup_type >= 2) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n"); yading@10: ret = AVERROR_INVALIDDATA; yading@10: goto error; yading@10: } yading@10: yading@10: // Initialize VLC table yading@10: if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n"); yading@10: ret = AVERROR_INVALIDDATA; yading@10: goto error; yading@10: } yading@10: codebook_setup->maxdepth = 0; yading@10: for (t = 0; t < entries; ++t) yading@10: if (tmp_vlc_bits[t] >= codebook_setup->maxdepth) yading@10: codebook_setup->maxdepth = tmp_vlc_bits[t]; yading@10: yading@10: if (codebook_setup->maxdepth > 3 * V_NB_BITS) yading@10: codebook_setup->nb_bits = V_NB_BITS2; yading@10: else yading@10: codebook_setup->nb_bits = V_NB_BITS; yading@10: yading@10: codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits; yading@10: yading@10: if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits, yading@10: entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits), yading@10: sizeof(*tmp_vlc_bits), tmp_vlc_codes, yading@10: sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes), yading@10: INIT_VLC_LE))) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n"); yading@10: goto error; yading@10: } yading@10: } yading@10: yading@10: av_free(tmp_vlc_bits); yading@10: av_free(tmp_vlc_codes); yading@10: av_free(codebook_multiplicands); yading@10: return 0; yading@10: yading@10: // Error: yading@10: error: yading@10: av_free(tmp_vlc_bits); yading@10: av_free(tmp_vlc_codes); yading@10: av_free(codebook_multiplicands); yading@10: return ret; yading@10: } yading@10: yading@10: // Process time domain transforms part (unused in Vorbis I) yading@10: yading@10: static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) yading@10: { yading@10: GetBitContext *gb = &vc->gb; yading@10: unsigned i, vorbis_time_count = get_bits(gb, 6) + 1; yading@10: yading@10: for (i = 0; i < vorbis_time_count; ++i) { yading@10: unsigned vorbis_tdtransform = get_bits(gb, 16); yading@10: yading@10: av_dlog(NULL, " Vorbis time domain transform %u: %u\n", yading@10: vorbis_time_count, vorbis_tdtransform); yading@10: yading@10: if (vorbis_tdtransform) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: // Process floors part yading@10: yading@10: static int vorbis_floor0_decode(vorbis_context *vc, yading@10: vorbis_floor_data *vfu, float *vec); yading@10: static int create_map(vorbis_context *vc, unsigned floor_number); yading@10: static int vorbis_floor1_decode(vorbis_context *vc, yading@10: vorbis_floor_data *vfu, float *vec); yading@10: static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) yading@10: { yading@10: GetBitContext *gb = &vc->gb; yading@10: int i, j, k, ret; yading@10: yading@10: vc->floor_count = get_bits(gb, 6) + 1; yading@10: yading@10: vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors)); yading@10: if (!vc->floors) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: for (i = 0; i < vc->floor_count; ++i) { yading@10: vorbis_floor *floor_setup = &vc->floors[i]; yading@10: yading@10: floor_setup->floor_type = get_bits(gb, 16); yading@10: yading@10: av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type); yading@10: yading@10: if (floor_setup->floor_type == 1) { yading@10: int maximum_class = -1; yading@10: unsigned rangebits, rangemax, floor1_values = 2; yading@10: yading@10: floor_setup->decode = vorbis_floor1_decode; yading@10: yading@10: floor_setup->data.t1.partitions = get_bits(gb, 5); yading@10: yading@10: av_dlog(NULL, " %d.floor: %d partitions \n", yading@10: i, floor_setup->data.t1.partitions); yading@10: yading@10: for (j = 0; j < floor_setup->data.t1.partitions; ++j) { yading@10: floor_setup->data.t1.partition_class[j] = get_bits(gb, 4); yading@10: if (floor_setup->data.t1.partition_class[j] > maximum_class) yading@10: maximum_class = floor_setup->data.t1.partition_class[j]; yading@10: yading@10: av_dlog(NULL, " %d. floor %d partition class %d \n", yading@10: i, j, floor_setup->data.t1.partition_class[j]); yading@10: yading@10: } yading@10: yading@10: av_dlog(NULL, " maximum class %d \n", maximum_class); yading@10: yading@10: for (j = 0; j <= maximum_class; ++j) { yading@10: floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1; yading@10: floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2); yading@10: yading@10: av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j, yading@10: floor_setup->data.t1.class_dimensions[j], yading@10: floor_setup->data.t1.class_subclasses[j]); yading@10: yading@10: if (floor_setup->data.t1.class_subclasses[j]) { yading@10: GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count) yading@10: yading@10: av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]); yading@10: } yading@10: yading@10: for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) { yading@10: int16_t bits = get_bits(gb, 8) - 1; yading@10: if (bits != -1) yading@10: VALIDATE_INDEX(bits, vc->codebook_count) yading@10: floor_setup->data.t1.subclass_books[j][k] = bits; yading@10: yading@10: av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]); yading@10: } yading@10: } yading@10: yading@10: floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1; yading@10: floor_setup->data.t1.x_list_dim = 2; yading@10: yading@10: for (j = 0; j < floor_setup->data.t1.partitions; ++j) yading@10: floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; yading@10: yading@10: floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim * yading@10: sizeof(*floor_setup->data.t1.list)); yading@10: if (!floor_setup->data.t1.list) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: rangebits = get_bits(gb, 4); yading@10: rangemax = (1 << rangebits); yading@10: if (rangemax > vc->blocksize[1] / 2) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, yading@10: "Floor value is too large for blocksize: %u (%"PRIu32")\n", yading@10: rangemax, vc->blocksize[1] / 2); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: floor_setup->data.t1.list[0].x = 0; yading@10: floor_setup->data.t1.list[1].x = rangemax; yading@10: yading@10: for (j = 0; j < floor_setup->data.t1.partitions; ++j) { yading@10: for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) { yading@10: floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits); yading@10: yading@10: av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values, yading@10: floor_setup->data.t1.list[floor1_values].x); yading@10: } yading@10: } yading@10: yading@10: // Precalculate order of x coordinates - needed for decode yading@10: if (ff_vorbis_ready_floor1_list(vc->avctx, yading@10: floor_setup->data.t1.list, yading@10: floor_setup->data.t1.x_list_dim)) { yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } else if (floor_setup->floor_type == 0) { yading@10: unsigned max_codebook_dim = 0; yading@10: yading@10: floor_setup->decode = vorbis_floor0_decode; yading@10: yading@10: floor_setup->data.t0.order = get_bits(gb, 8); yading@10: if (!floor_setup->data.t0.order) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: floor_setup->data.t0.rate = get_bits(gb, 16); yading@10: if (!floor_setup->data.t0.rate) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: floor_setup->data.t0.bark_map_size = get_bits(gb, 16); yading@10: if (!floor_setup->data.t0.bark_map_size) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, yading@10: "Floor 0 bark map size is 0.\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: floor_setup->data.t0.amplitude_bits = get_bits(gb, 6); yading@10: floor_setup->data.t0.amplitude_offset = get_bits(gb, 8); yading@10: floor_setup->data.t0.num_books = get_bits(gb, 4) + 1; yading@10: yading@10: /* allocate mem for booklist */ yading@10: floor_setup->data.t0.book_list = yading@10: av_malloc(floor_setup->data.t0.num_books); yading@10: if (!floor_setup->data.t0.book_list) yading@10: return AVERROR(ENOMEM); yading@10: /* read book indexes */ yading@10: { yading@10: int idx; yading@10: unsigned book_idx; yading@10: for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) { yading@10: GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count) yading@10: floor_setup->data.t0.book_list[idx] = book_idx; yading@10: if (vc->codebooks[book_idx].dimensions > max_codebook_dim) yading@10: max_codebook_dim = vc->codebooks[book_idx].dimensions; yading@10: } yading@10: } yading@10: yading@10: if ((ret = create_map(vc, i)) < 0) yading@10: return ret; yading@10: yading@10: /* codebook dim is for padding if codebook dim doesn't * yading@10: * divide order+1 then we need to read more data */ yading@10: floor_setup->data.t0.lsp = yading@10: av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim) yading@10: * sizeof(*floor_setup->data.t0.lsp)); yading@10: if (!floor_setup->data.t0.lsp) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: /* debug output parsed headers */ yading@10: av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order); yading@10: av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate); yading@10: av_dlog(NULL, "floor0 bark map size: %u\n", yading@10: floor_setup->data.t0.bark_map_size); yading@10: av_dlog(NULL, "floor0 amplitude bits: %u\n", yading@10: floor_setup->data.t0.amplitude_bits); yading@10: av_dlog(NULL, "floor0 amplitude offset: %u\n", yading@10: floor_setup->data.t0.amplitude_offset); yading@10: av_dlog(NULL, "floor0 number of books: %u\n", yading@10: floor_setup->data.t0.num_books); yading@10: av_dlog(NULL, "floor0 book list pointer: %p\n", yading@10: floor_setup->data.t0.book_list); yading@10: { yading@10: int idx; yading@10: for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) { yading@10: av_dlog(NULL, " Book %d: %u\n", idx + 1, yading@10: floor_setup->data.t0.book_list[idx]); yading@10: } yading@10: } yading@10: } else { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: // Process residues part yading@10: yading@10: static int vorbis_parse_setup_hdr_residues(vorbis_context *vc) yading@10: { yading@10: GetBitContext *gb = &vc->gb; yading@10: unsigned i, j, k; yading@10: yading@10: vc->residue_count = get_bits(gb, 6)+1; yading@10: vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues)); yading@10: if (!vc->residues) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: av_dlog(NULL, " There are %d residues. \n", vc->residue_count); yading@10: yading@10: for (i = 0; i < vc->residue_count; ++i) { yading@10: vorbis_residue *res_setup = &vc->residues[i]; yading@10: uint8_t cascade[64]; yading@10: unsigned high_bits, low_bits; yading@10: yading@10: res_setup->type = get_bits(gb, 16); yading@10: yading@10: av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type); yading@10: yading@10: res_setup->begin = get_bits(gb, 24); yading@10: res_setup->end = get_bits(gb, 24); yading@10: res_setup->partition_size = get_bits(gb, 24) + 1; yading@10: /* Validations to prevent a buffer overflow later. */ yading@10: if (res_setup->begin>res_setup->end || yading@10: res_setup->end > (res_setup->type == 2 ? vc->audio_channels : 1) * vc->blocksize[1] / 2 || yading@10: (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, yading@10: "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n", yading@10: res_setup->type, res_setup->begin, res_setup->end, yading@10: res_setup->partition_size, vc->blocksize[1] / 2); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: res_setup->classifications = get_bits(gb, 6) + 1; yading@10: GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count) yading@10: yading@10: res_setup->ptns_to_read = yading@10: (res_setup->end - res_setup->begin) / res_setup->partition_size; yading@10: res_setup->classifs = av_malloc(res_setup->ptns_to_read * yading@10: vc->audio_channels * yading@10: sizeof(*res_setup->classifs)); yading@10: if (!res_setup->classifs) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n", yading@10: res_setup->begin, res_setup->end, res_setup->partition_size, yading@10: res_setup->classifications, res_setup->classbook); yading@10: yading@10: for (j = 0; j < res_setup->classifications; ++j) { yading@10: high_bits = 0; yading@10: low_bits = get_bits(gb, 3); yading@10: if (get_bits1(gb)) yading@10: high_bits = get_bits(gb, 5); yading@10: cascade[j] = (high_bits << 3) + low_bits; yading@10: yading@10: av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j])); yading@10: } yading@10: yading@10: res_setup->maxpass = 0; yading@10: for (j = 0; j < res_setup->classifications; ++j) { yading@10: for (k = 0; k < 8; ++k) { yading@10: if (cascade[j]&(1 << k)) { yading@10: GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count) yading@10: yading@10: av_dlog(NULL, " %u class cascade depth %u book: %d\n", yading@10: j, k, res_setup->books[j][k]); yading@10: yading@10: if (k>res_setup->maxpass) yading@10: res_setup->maxpass = k; yading@10: } else { yading@10: res_setup->books[j][k] = -1; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: // Process mappings part yading@10: yading@10: static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) yading@10: { yading@10: GetBitContext *gb = &vc->gb; yading@10: unsigned i, j; yading@10: yading@10: vc->mapping_count = get_bits(gb, 6)+1; yading@10: vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings)); yading@10: if (!vc->mappings) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count); yading@10: yading@10: for (i = 0; i < vc->mapping_count; ++i) { yading@10: vorbis_mapping *mapping_setup = &vc->mappings[i]; yading@10: yading@10: if (get_bits(gb, 16)) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: if (get_bits1(gb)) { yading@10: mapping_setup->submaps = get_bits(gb, 4) + 1; yading@10: } else { yading@10: mapping_setup->submaps = 1; yading@10: } yading@10: yading@10: if (get_bits1(gb)) { yading@10: mapping_setup->coupling_steps = get_bits(gb, 8) + 1; yading@10: mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps * yading@10: sizeof(*mapping_setup->magnitude)); yading@10: mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps * yading@10: sizeof(*mapping_setup->angle)); yading@10: if (!mapping_setup->angle || !mapping_setup->magnitude) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: for (j = 0; j < mapping_setup->coupling_steps; ++j) { yading@10: GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels) yading@10: GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels) yading@10: } yading@10: } else { yading@10: mapping_setup->coupling_steps = 0; yading@10: } yading@10: yading@10: av_dlog(NULL, " %u mapping coupling steps: %d\n", yading@10: i, mapping_setup->coupling_steps); yading@10: yading@10: if (get_bits(gb, 2)) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i); yading@10: return AVERROR_INVALIDDATA; // following spec. yading@10: } yading@10: yading@10: if (mapping_setup->submaps>1) { yading@10: mapping_setup->mux = av_mallocz(vc->audio_channels * yading@10: sizeof(*mapping_setup->mux)); yading@10: if (!mapping_setup->mux) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: for (j = 0; j < vc->audio_channels; ++j) yading@10: mapping_setup->mux[j] = get_bits(gb, 4); yading@10: } yading@10: yading@10: for (j = 0; j < mapping_setup->submaps; ++j) { yading@10: skip_bits(gb, 8); // FIXME check? yading@10: GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count) yading@10: GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count) yading@10: yading@10: av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j, yading@10: mapping_setup->submap_floor[j], yading@10: mapping_setup->submap_residue[j]); yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: // Process modes part yading@10: yading@10: static int create_map(vorbis_context *vc, unsigned floor_number) yading@10: { yading@10: vorbis_floor *floors = vc->floors; yading@10: vorbis_floor0 *vf; yading@10: int idx; yading@10: int blockflag, n; yading@10: int32_t *map; yading@10: yading@10: for (blockflag = 0; blockflag < 2; ++blockflag) { yading@10: n = vc->blocksize[blockflag] / 2; yading@10: floors[floor_number].data.t0.map[blockflag] = yading@10: av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel yading@10: if (!floors[floor_number].data.t0.map[blockflag]) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: map = floors[floor_number].data.t0.map[blockflag]; yading@10: vf = &floors[floor_number].data.t0; yading@10: yading@10: for (idx = 0; idx < n; ++idx) { yading@10: map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) * yading@10: (vf->bark_map_size / BARK(vf->rate / 2.0f))); yading@10: if (vf->bark_map_size-1 < map[idx]) yading@10: map[idx] = vf->bark_map_size - 1; yading@10: } yading@10: map[n] = -1; yading@10: vf->map_size[blockflag] = n; yading@10: } yading@10: yading@10: for (idx = 0; idx <= n; ++idx) { yading@10: av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]); yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) yading@10: { yading@10: GetBitContext *gb = &vc->gb; yading@10: unsigned i; yading@10: yading@10: vc->mode_count = get_bits(gb, 6) + 1; yading@10: vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes)); yading@10: if (!vc->modes) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: av_dlog(NULL, " There are %d modes.\n", vc->mode_count); yading@10: yading@10: for (i = 0; i < vc->mode_count; ++i) { yading@10: vorbis_mode *mode_setup = &vc->modes[i]; yading@10: yading@10: mode_setup->blockflag = get_bits1(gb); yading@10: mode_setup->windowtype = get_bits(gb, 16); //FIXME check yading@10: mode_setup->transformtype = get_bits(gb, 16); //FIXME check yading@10: GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count); yading@10: yading@10: av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n", yading@10: i, mode_setup->blockflag, mode_setup->windowtype, yading@10: mode_setup->transformtype, mode_setup->mapping); yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: // Process the whole setup header using the functions above yading@10: yading@10: static int vorbis_parse_setup_hdr(vorbis_context *vc) yading@10: { yading@10: GetBitContext *gb = &vc->gb; yading@10: int ret; yading@10: yading@10: if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') || yading@10: (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') || yading@10: (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n"); yading@10: return ret; yading@10: } yading@10: if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n"); yading@10: return ret; yading@10: } yading@10: if ((ret = vorbis_parse_setup_hdr_floors(vc))) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n"); yading@10: return ret; yading@10: } yading@10: if ((ret = vorbis_parse_setup_hdr_residues(vc))) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n"); yading@10: return ret; yading@10: } yading@10: if ((ret = vorbis_parse_setup_hdr_mappings(vc))) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n"); yading@10: return ret; yading@10: } yading@10: if ((ret = vorbis_parse_setup_hdr_modes(vc))) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n"); yading@10: return ret; yading@10: } yading@10: if (!get_bits1(gb)) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n"); yading@10: return AVERROR_INVALIDDATA; // framing flag bit unset error yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: // Process the identification header yading@10: yading@10: static int vorbis_parse_id_hdr(vorbis_context *vc) yading@10: { yading@10: GetBitContext *gb = &vc->gb; yading@10: unsigned bl0, bl1; yading@10: yading@10: if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') || yading@10: (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') || yading@10: (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: vc->version = get_bits_long(gb, 32); //FIXME check 0 yading@10: vc->audio_channels = get_bits(gb, 8); yading@10: if (vc->audio_channels <= 0) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: vc->audio_samplerate = get_bits_long(gb, 32); yading@10: if (vc->audio_samplerate <= 0) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: vc->bitrate_maximum = get_bits_long(gb, 32); yading@10: vc->bitrate_nominal = get_bits_long(gb, 32); yading@10: vc->bitrate_minimum = get_bits_long(gb, 32); yading@10: bl0 = get_bits(gb, 4); yading@10: bl1 = get_bits(gb, 4); yading@10: if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: vc->blocksize[0] = (1 << bl0); yading@10: vc->blocksize[1] = (1 << bl1); yading@10: vc->win[0] = ff_vorbis_vwin[bl0 - 6]; yading@10: vc->win[1] = ff_vorbis_vwin[bl1 - 6]; yading@10: yading@10: if ((get_bits1(gb)) == 0) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues)); yading@10: vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved)); yading@10: if (!vc->channel_residues || !vc->saved) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: vc->previous_window = 0; yading@10: yading@10: ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0); yading@10: ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0); yading@10: yading@10: av_dlog(NULL, " vorbis version %d \n audio_channels %d \n audio_samplerate %d \n bitrate_max %d \n bitrate_nom %d \n bitrate_min %d \n blk_0 %d blk_1 %d \n ", yading@10: vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]); yading@10: yading@10: /* yading@10: BLK = vc->blocksize[0]; yading@10: for (i = 0; i < BLK / 2; ++i) { yading@10: 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))); yading@10: } yading@10: */ yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: // Process the extradata using the functions above (identification header, setup header) yading@10: yading@10: static av_cold int vorbis_decode_init(AVCodecContext *avctx) yading@10: { yading@10: vorbis_context *vc = avctx->priv_data; yading@10: uint8_t *headers = avctx->extradata; yading@10: int headers_len = avctx->extradata_size; yading@10: uint8_t *header_start[3]; yading@10: int header_len[3]; yading@10: GetBitContext *gb = &vc->gb; yading@10: int hdr_type, ret; yading@10: yading@10: vc->avctx = avctx; yading@10: ff_vorbisdsp_init(&vc->dsp); yading@10: avpriv_float_dsp_init(&vc->fdsp, avctx->flags & CODEC_FLAG_BITEXACT); yading@10: ff_fmt_convert_init(&vc->fmt_conv, avctx); yading@10: yading@10: avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; yading@10: yading@10: if (!headers_len) { yading@10: av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) { yading@10: av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n"); yading@10: return ret; yading@10: } yading@10: yading@10: init_get_bits(gb, header_start[0], header_len[0]*8); yading@10: hdr_type = get_bits(gb, 8); yading@10: if (hdr_type != 1) { yading@10: av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: if ((ret = vorbis_parse_id_hdr(vc))) { yading@10: av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n"); yading@10: vorbis_free(vc); yading@10: return ret; yading@10: } yading@10: yading@10: init_get_bits(gb, header_start[2], header_len[2]*8); yading@10: hdr_type = get_bits(gb, 8); yading@10: if (hdr_type != 5) { yading@10: av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n"); yading@10: vorbis_free(vc); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: if ((ret = vorbis_parse_setup_hdr(vc))) { yading@10: av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n"); yading@10: vorbis_free(vc); yading@10: return ret; yading@10: } yading@10: yading@10: if (vc->audio_channels > 8) yading@10: avctx->channel_layout = 0; yading@10: else yading@10: avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1]; yading@10: yading@10: avctx->channels = vc->audio_channels; yading@10: avctx->sample_rate = vc->audio_samplerate; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: // Decode audiopackets ------------------------------------------------- yading@10: yading@10: // Read and decode floor yading@10: yading@10: static int vorbis_floor0_decode(vorbis_context *vc, yading@10: vorbis_floor_data *vfu, float *vec) yading@10: { yading@10: vorbis_floor0 *vf = &vfu->t0; yading@10: float *lsp = vf->lsp; yading@10: unsigned amplitude, book_idx; yading@10: unsigned blockflag = vc->modes[vc->mode_number].blockflag; yading@10: yading@10: if (!vf->amplitude_bits) yading@10: return 1; yading@10: yading@10: amplitude = get_bits(&vc->gb, vf->amplitude_bits); yading@10: if (amplitude > 0) { yading@10: float last = 0; yading@10: unsigned idx, lsp_len = 0; yading@10: vorbis_codebook codebook; yading@10: yading@10: book_idx = get_bits(&vc->gb, ilog(vf->num_books)); yading@10: if (book_idx >= vf->num_books) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n"); yading@10: book_idx = 0; yading@10: } yading@10: av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx); yading@10: codebook = vc->codebooks[vf->book_list[book_idx]]; yading@10: /* Invalid codebook! */ yading@10: if (!codebook.codevectors) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: while (lsp_lenorder) { yading@10: int vec_off; yading@10: yading@10: av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions); yading@10: av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth); yading@10: /* read temp vector */ yading@10: vec_off = get_vlc2(&vc->gb, codebook.vlc.table, yading@10: codebook.nb_bits, codebook.maxdepth) yading@10: * codebook.dimensions; yading@10: av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off); yading@10: /* copy each vector component and add last to it */ yading@10: for (idx = 0; idx < codebook.dimensions; ++idx) yading@10: lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last; yading@10: last = lsp[lsp_len+idx-1]; /* set last to last vector component */ yading@10: yading@10: lsp_len += codebook.dimensions; yading@10: } yading@10: /* DEBUG: output lsp coeffs */ yading@10: { yading@10: int idx; yading@10: for (idx = 0; idx < lsp_len; ++idx) yading@10: av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]); yading@10: } yading@10: yading@10: /* synthesize floor output vector */ yading@10: { yading@10: int i; yading@10: int order = vf->order; yading@10: float wstep = M_PI / vf->bark_map_size; yading@10: yading@10: for (i = 0; i < order; i++) yading@10: lsp[i] = 2.0f * cos(lsp[i]); yading@10: yading@10: av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n", yading@10: vf->map_size[blockflag], order, wstep); yading@10: yading@10: i = 0; yading@10: while (i < vf->map_size[blockflag]) { yading@10: int j, iter_cond = vf->map[blockflag][i]; yading@10: float p = 0.5f; yading@10: float q = 0.5f; yading@10: float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times yading@10: yading@10: /* similar part for the q and p products */ yading@10: for (j = 0; j + 1 < order; j += 2) { yading@10: q *= lsp[j] - two_cos_w; yading@10: p *= lsp[j + 1] - two_cos_w; yading@10: } yading@10: if (j == order) { // even order yading@10: p *= p * (2.0f - two_cos_w); yading@10: q *= q * (2.0f + two_cos_w); yading@10: } else { // odd order yading@10: q *= two_cos_w-lsp[j]; // one more time for q yading@10: yading@10: /* final step and square */ yading@10: p *= p * (4.f - two_cos_w * two_cos_w); yading@10: q *= q; yading@10: } yading@10: yading@10: /* calculate linear floor value */ yading@10: q = exp((((amplitude*vf->amplitude_offset) / yading@10: (((1 << vf->amplitude_bits) - 1) * sqrt(p + q))) yading@10: - vf->amplitude_offset) * .11512925f); yading@10: yading@10: /* fill vector */ yading@10: do { yading@10: vec[i] = q; ++i; yading@10: } while (vf->map[blockflag][i] == iter_cond); yading@10: } yading@10: } yading@10: } else { yading@10: /* this channel is unused */ yading@10: return 1; yading@10: } yading@10: yading@10: av_dlog(NULL, " Floor0 decoded\n"); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int vorbis_floor1_decode(vorbis_context *vc, yading@10: vorbis_floor_data *vfu, float *vec) yading@10: { yading@10: vorbis_floor1 *vf = &vfu->t1; yading@10: GetBitContext *gb = &vc->gb; yading@10: uint16_t range_v[4] = { 256, 128, 86, 64 }; yading@10: unsigned range = range_v[vf->multiplier - 1]; yading@10: uint16_t floor1_Y[258]; yading@10: uint16_t floor1_Y_final[258]; yading@10: int floor1_flag[258]; yading@10: unsigned partition_class, cdim, cbits, csub, cval, offset, i, j; yading@10: int book, adx, ady, dy, off, predicted, err; yading@10: yading@10: yading@10: if (!get_bits1(gb)) // silence yading@10: return 1; yading@10: yading@10: // Read values (or differences) for the floor's points yading@10: yading@10: floor1_Y[0] = get_bits(gb, ilog(range - 1)); yading@10: floor1_Y[1] = get_bits(gb, ilog(range - 1)); yading@10: yading@10: av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]); yading@10: yading@10: offset = 2; yading@10: for (i = 0; i < vf->partitions; ++i) { yading@10: partition_class = vf->partition_class[i]; yading@10: cdim = vf->class_dimensions[partition_class]; yading@10: cbits = vf->class_subclasses[partition_class]; yading@10: csub = (1 << cbits) - 1; yading@10: cval = 0; yading@10: yading@10: av_dlog(NULL, "Cbits %u\n", cbits); yading@10: yading@10: if (cbits) // this reads all subclasses for this partition's class yading@10: cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table, yading@10: vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3); yading@10: yading@10: for (j = 0; j < cdim; ++j) { yading@10: book = vf->subclass_books[partition_class][cval & csub]; yading@10: yading@10: av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n", yading@10: book, cbits, cval, get_bits_count(gb)); yading@10: yading@10: cval = cval >> cbits; yading@10: if (book > -1) { yading@10: floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table, yading@10: vc->codebooks[book].nb_bits, 3); yading@10: } else { yading@10: floor1_Y[offset+j] = 0; yading@10: } yading@10: yading@10: av_dlog(NULL, " floor(%d) = %d \n", yading@10: vf->list[offset+j].x, floor1_Y[offset+j]); yading@10: } yading@10: offset+=cdim; yading@10: } yading@10: yading@10: // Amplitude calculation from the differences yading@10: yading@10: floor1_flag[0] = 1; yading@10: floor1_flag[1] = 1; yading@10: floor1_Y_final[0] = floor1_Y[0]; yading@10: floor1_Y_final[1] = floor1_Y[1]; yading@10: yading@10: for (i = 2; i < vf->x_list_dim; ++i) { yading@10: unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs; yading@10: yading@10: low_neigh_offs = vf->list[i].low; yading@10: high_neigh_offs = vf->list[i].high; yading@10: dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin yading@10: adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x; yading@10: ady = FFABS(dy); yading@10: err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x); yading@10: off = err / adx; yading@10: if (dy < 0) { yading@10: predicted = floor1_Y_final[low_neigh_offs] - off; yading@10: } else { yading@10: predicted = floor1_Y_final[low_neigh_offs] + off; yading@10: } // render_point end yading@10: yading@10: val = floor1_Y[i]; yading@10: highroom = range-predicted; yading@10: lowroom = predicted; yading@10: if (highroom < lowroom) { yading@10: room = highroom * 2; yading@10: } else { yading@10: room = lowroom * 2; // SPEC misspelling yading@10: } yading@10: if (val) { yading@10: floor1_flag[low_neigh_offs] = 1; yading@10: floor1_flag[high_neigh_offs] = 1; yading@10: floor1_flag[i] = 1; yading@10: if (val >= room) { yading@10: if (highroom > lowroom) { yading@10: floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted); yading@10: } else { yading@10: floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1); yading@10: } yading@10: } else { yading@10: if (val & 1) { yading@10: floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2); yading@10: } else { yading@10: floor1_Y_final[i] = av_clip_uint16(predicted + val / 2); yading@10: } yading@10: } yading@10: } else { yading@10: floor1_flag[i] = 0; yading@10: floor1_Y_final[i] = av_clip_uint16(predicted); yading@10: } yading@10: yading@10: av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n", yading@10: vf->list[i].x, floor1_Y_final[i], val); yading@10: } yading@10: yading@10: // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ? yading@10: yading@10: ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x); yading@10: yading@10: av_dlog(NULL, " Floor decoded\n"); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: // Read and decode residue yading@10: yading@10: static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc, yading@10: vorbis_residue *vr, yading@10: unsigned ch, yading@10: uint8_t *do_not_decode, yading@10: float *vec, yading@10: unsigned vlen, yading@10: unsigned ch_left, yading@10: int vr_type) yading@10: { yading@10: GetBitContext *gb = &vc->gb; yading@10: unsigned c_p_c = vc->codebooks[vr->classbook].dimensions; yading@10: unsigned ptns_to_read = vr->ptns_to_read; yading@10: uint8_t *classifs = vr->classifs; yading@10: unsigned pass, ch_used, i, j, k, l; yading@10: unsigned max_output = (ch - 1) * vlen; yading@10: yading@10: if (vr_type == 2) { yading@10: for (j = 1; j < ch; ++j) yading@10: do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input yading@10: if (do_not_decode[0]) yading@10: return 0; yading@10: ch_used = 1; yading@10: max_output += vr->end / ch; yading@10: } else { yading@10: ch_used = ch; yading@10: max_output += vr->end; yading@10: } yading@10: yading@10: if (max_output > ch_left * vlen) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n"); yading@10: return -1; yading@10: } yading@10: yading@10: av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c); yading@10: yading@10: for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE? yading@10: uint16_t voffset, partition_count, j_times_ptns_to_read; yading@10: yading@10: voffset = vr->begin; yading@10: for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error yading@10: if (!pass) { yading@10: unsigned inverse_class = ff_inverse[vr->classifications]; yading@10: for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) { yading@10: if (!do_not_decode[j]) { yading@10: unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table, yading@10: vc->codebooks[vr->classbook].nb_bits, 3); yading@10: yading@10: av_dlog(NULL, "Classword: %u\n", temp); yading@10: yading@10: av_assert0(vr->classifications > 1 && temp <= 65536); //needed for inverse[] yading@10: for (i = 0; i < c_p_c; ++i) { yading@10: unsigned temp2; yading@10: yading@10: temp2 = (((uint64_t)temp) * inverse_class) >> 32; yading@10: if (partition_count + c_p_c - 1 - i < ptns_to_read) yading@10: classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications; yading@10: temp = temp2; yading@10: } yading@10: } yading@10: j_times_ptns_to_read += ptns_to_read; yading@10: } yading@10: } yading@10: for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) { yading@10: for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) { yading@10: unsigned voffs; yading@10: yading@10: if (!do_not_decode[j]) { yading@10: unsigned vqclass = classifs[j_times_ptns_to_read + partition_count]; yading@10: int vqbook = vr->books[vqclass][pass]; yading@10: yading@10: if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) { yading@10: unsigned coffs; yading@10: unsigned dim = vc->codebooks[vqbook].dimensions; yading@10: unsigned step = FASTDIV(vr->partition_size << 1, dim << 1); yading@10: vorbis_codebook codebook = vc->codebooks[vqbook]; yading@10: yading@10: if (vr_type == 0) { yading@10: yading@10: voffs = voffset+j*vlen; yading@10: for (k = 0; k < step; ++k) { yading@10: coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim; yading@10: for (l = 0; l < dim; ++l) yading@10: vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; yading@10: } yading@10: } else if (vr_type == 1) { yading@10: voffs = voffset + j * vlen; yading@10: for (k = 0; k < step; ++k) { yading@10: coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim; yading@10: for (l = 0; l < dim; ++l, ++voffs) { yading@10: vec[voffs]+=codebook.codevectors[coffs+l]; yading@10: yading@10: av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n", yading@10: pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs); yading@10: } yading@10: } yading@10: } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized yading@10: voffs = voffset >> 1; yading@10: yading@10: if (dim == 2) { yading@10: for (k = 0; k < step; ++k) { yading@10: coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2; yading@10: vec[voffs + k ] += codebook.codevectors[coffs ]; yading@10: vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; yading@10: } yading@10: } else if (dim == 4) { yading@10: for (k = 0; k < step; ++k, voffs += 2) { yading@10: coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4; yading@10: vec[voffs ] += codebook.codevectors[coffs ]; yading@10: vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; yading@10: vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; yading@10: vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; yading@10: } yading@10: } else yading@10: for (k = 0; k < step; ++k) { yading@10: coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim; yading@10: for (l = 0; l < dim; l += 2, voffs++) { yading@10: vec[voffs ] += codebook.codevectors[coffs + l ]; yading@10: vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; yading@10: yading@10: av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", yading@10: pass, voffset / ch + (voffs % ch) * vlen, yading@10: vec[voffset / ch + (voffs % ch) * vlen], yading@10: codebook.codevectors[coffs + l], coffs, l); yading@10: } yading@10: } yading@10: yading@10: } else if (vr_type == 2) { yading@10: unsigned voffs_div = FASTDIV(voffset << 1, ch <<1); yading@10: unsigned voffs_mod = voffset - voffs_div * ch; yading@10: yading@10: for (k = 0; k < step; ++k) { yading@10: coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim; yading@10: for (l = 0; l < dim; ++l) { yading@10: vec[voffs_div + voffs_mod * vlen] += yading@10: codebook.codevectors[coffs + l]; yading@10: yading@10: av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", yading@10: pass, voffs_div + voffs_mod * vlen, yading@10: vec[voffs_div + voffs_mod * vlen], yading@10: codebook.codevectors[coffs + l], coffs, l); yading@10: yading@10: if (++voffs_mod == ch) { yading@10: voffs_div++; yading@10: voffs_mod = 0; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: } yading@10: } yading@10: j_times_ptns_to_read += ptns_to_read; yading@10: } yading@10: ++partition_count; yading@10: voffset += vr->partition_size; yading@10: } yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr, yading@10: unsigned ch, yading@10: uint8_t *do_not_decode, yading@10: float *vec, unsigned vlen, yading@10: unsigned ch_left) yading@10: { yading@10: if (vr->type == 2) yading@10: return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2); yading@10: else if (vr->type == 1) yading@10: return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1); yading@10: else if (vr->type == 0) yading@10: return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0); yading@10: else { yading@10: av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } yading@10: yading@10: void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize) yading@10: { yading@10: int i; yading@10: for (i = 0; i < blocksize; i++) { yading@10: if (mag[i] > 0.0) { yading@10: if (ang[i] > 0.0) { yading@10: ang[i] = mag[i] - ang[i]; yading@10: } else { yading@10: float temp = ang[i]; yading@10: ang[i] = mag[i]; yading@10: mag[i] += temp; yading@10: } yading@10: } else { yading@10: if (ang[i] > 0.0) { yading@10: ang[i] += mag[i]; yading@10: } else { yading@10: float temp = ang[i]; yading@10: ang[i] = mag[i]; yading@10: mag[i] -= temp; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: // Decode the audio packet using the functions above yading@10: yading@10: static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr) yading@10: { yading@10: GetBitContext *gb = &vc->gb; yading@10: FFTContext *mdct; yading@10: unsigned previous_window = vc->previous_window; yading@10: unsigned mode_number, blockflag, blocksize; yading@10: int i, j; yading@10: uint8_t no_residue[255]; yading@10: uint8_t do_not_decode[255]; yading@10: vorbis_mapping *mapping; yading@10: float *ch_res_ptr = vc->channel_residues; yading@10: uint8_t res_chan[255]; yading@10: unsigned res_num = 0; yading@10: int retlen = 0; yading@10: unsigned ch_left = vc->audio_channels; yading@10: unsigned vlen; yading@10: yading@10: if (get_bits1(gb)) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n"); yading@10: return AVERROR_INVALIDDATA; // packet type not audio yading@10: } yading@10: yading@10: if (vc->mode_count == 1) { yading@10: mode_number = 0; yading@10: } else { yading@10: GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count) yading@10: } yading@10: vc->mode_number = mode_number; yading@10: mapping = &vc->mappings[vc->modes[mode_number].mapping]; yading@10: yading@10: av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number, yading@10: vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag); yading@10: yading@10: blockflag = vc->modes[mode_number].blockflag; yading@10: blocksize = vc->blocksize[blockflag]; yading@10: vlen = blocksize / 2; yading@10: if (blockflag) { yading@10: previous_window = get_bits(gb, 1); yading@10: skip_bits1(gb); // next_window yading@10: } yading@10: yading@10: memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ? yading@10: for (i = 0; i < vc->audio_channels; ++i) yading@10: memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ? yading@10: yading@10: // Decode floor yading@10: yading@10: for (i = 0; i < vc->audio_channels; ++i) { yading@10: vorbis_floor *floor; yading@10: int ret; yading@10: if (mapping->submaps > 1) { yading@10: floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]]; yading@10: } else { yading@10: floor = &vc->floors[mapping->submap_floor[0]]; yading@10: } yading@10: yading@10: ret = floor->decode(vc, &floor->data, floor_ptr[i]); yading@10: yading@10: if (ret < 0) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: no_residue[i] = ret; yading@10: } yading@10: yading@10: // Nonzero vector propagate yading@10: yading@10: for (i = mapping->coupling_steps - 1; i >= 0; --i) { yading@10: if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) { yading@10: no_residue[mapping->magnitude[i]] = 0; yading@10: no_residue[mapping->angle[i]] = 0; yading@10: } yading@10: } yading@10: yading@10: // Decode residue yading@10: yading@10: for (i = 0; i < mapping->submaps; ++i) { yading@10: vorbis_residue *residue; yading@10: unsigned ch = 0; yading@10: int ret; yading@10: yading@10: for (j = 0; j < vc->audio_channels; ++j) { yading@10: if ((mapping->submaps == 1) || (i == mapping->mux[j])) { yading@10: res_chan[j] = res_num; yading@10: if (no_residue[j]) { yading@10: do_not_decode[ch] = 1; yading@10: } else { yading@10: do_not_decode[ch] = 0; yading@10: } yading@10: ++ch; yading@10: ++res_num; yading@10: } yading@10: } yading@10: residue = &vc->residues[mapping->submap_residue[i]]; yading@10: if (ch_left < ch) { yading@10: av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n"); yading@10: return -1; yading@10: } yading@10: if (ch) { yading@10: ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left); yading@10: if (ret < 0) yading@10: return ret; yading@10: } yading@10: yading@10: ch_res_ptr += ch * vlen; yading@10: ch_left -= ch; yading@10: } yading@10: yading@10: if (ch_left > 0) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: // Inverse coupling yading@10: yading@10: for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed yading@10: float *mag, *ang; yading@10: yading@10: mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2; yading@10: ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2; yading@10: vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2); yading@10: } yading@10: yading@10: // Dotproduct, MDCT yading@10: yading@10: mdct = &vc->mdct[blockflag]; yading@10: yading@10: for (j = vc->audio_channels-1;j >= 0; j--) { yading@10: ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2; yading@10: vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2); yading@10: mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]); yading@10: } yading@10: yading@10: // Overlap/add, save data for next overlapping yading@10: yading@10: retlen = (blocksize + vc->blocksize[previous_window]) / 4; yading@10: for (j = 0; j < vc->audio_channels; j++) { yading@10: unsigned bs0 = vc->blocksize[0]; yading@10: unsigned bs1 = vc->blocksize[1]; yading@10: float *residue = vc->channel_residues + res_chan[j] * blocksize / 2; yading@10: float *saved = vc->saved + j * bs1 / 4; yading@10: float *ret = floor_ptr[j]; yading@10: float *buf = residue; yading@10: const float *win = vc->win[blockflag & previous_window]; yading@10: yading@10: if (blockflag == previous_window) { yading@10: vc->fdsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4); yading@10: } else if (blockflag > previous_window) { yading@10: vc->fdsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4); yading@10: memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float)); yading@10: } else { yading@10: memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float)); yading@10: vc->fdsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4); yading@10: } yading@10: memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float)); yading@10: } yading@10: yading@10: vc->previous_window = blockflag; yading@10: return retlen; yading@10: } yading@10: yading@10: // Return the decoded audio packet through the standard api yading@10: yading@10: static int vorbis_decode_frame(AVCodecContext *avctx, void *data, yading@10: int *got_frame_ptr, AVPacket *avpkt) yading@10: { yading@10: const uint8_t *buf = avpkt->data; yading@10: int buf_size = avpkt->size; yading@10: vorbis_context *vc = avctx->priv_data; yading@10: AVFrame *frame = data; yading@10: GetBitContext *gb = &vc->gb; yading@10: float *channel_ptrs[255]; yading@10: int i, len, ret; yading@10: yading@10: av_dlog(NULL, "packet length %d \n", buf_size); yading@10: yading@10: if (*buf == 1 && buf_size > 7) { yading@10: init_get_bits(gb, buf+1, buf_size*8 - 8); yading@10: vorbis_free(vc); yading@10: if ((ret = vorbis_parse_id_hdr(vc))) { yading@10: av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n"); yading@10: vorbis_free(vc); yading@10: return ret; yading@10: } yading@10: yading@10: if (vc->audio_channels > 8) yading@10: avctx->channel_layout = 0; yading@10: else yading@10: avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1]; yading@10: yading@10: avctx->channels = vc->audio_channels; yading@10: avctx->sample_rate = vc->audio_samplerate; yading@10: return buf_size; yading@10: } yading@10: yading@10: if (*buf == 3 && buf_size > 7) { yading@10: av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n"); yading@10: return buf_size; yading@10: } yading@10: yading@10: if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) { yading@10: init_get_bits(gb, buf+1, buf_size*8 - 8); yading@10: if ((ret = vorbis_parse_setup_hdr(vc))) { yading@10: av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n"); yading@10: vorbis_free(vc); yading@10: return ret; yading@10: } yading@10: return buf_size; yading@10: } yading@10: yading@10: if (!vc->channel_residues || !vc->modes) { yading@10: av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: /* get output buffer */ yading@10: frame->nb_samples = vc->blocksize[1] / 2; yading@10: if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) yading@10: return ret; yading@10: yading@10: if (vc->audio_channels > 8) { yading@10: for (i = 0; i < vc->audio_channels; i++) yading@10: channel_ptrs[i] = (float *)frame->extended_data[i]; yading@10: } else { yading@10: for (i = 0; i < vc->audio_channels; i++) { yading@10: int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i]; yading@10: channel_ptrs[ch] = (float *)frame->extended_data[i]; yading@10: } yading@10: } yading@10: yading@10: init_get_bits(gb, buf, buf_size*8); yading@10: yading@10: if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0) yading@10: return len; yading@10: yading@10: if (!vc->first_frame) { yading@10: vc->first_frame = 1; yading@10: *got_frame_ptr = 0; yading@10: av_frame_unref(frame); yading@10: return buf_size; yading@10: } yading@10: yading@10: av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", yading@10: get_bits_count(gb) / 8, get_bits_count(gb) % 8, len); yading@10: yading@10: frame->nb_samples = len; yading@10: *got_frame_ptr = 1; yading@10: yading@10: return buf_size; yading@10: } yading@10: yading@10: // Close decoder yading@10: yading@10: static av_cold int vorbis_decode_close(AVCodecContext *avctx) yading@10: { yading@10: vorbis_context *vc = avctx->priv_data; yading@10: yading@10: vorbis_free(vc); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold void vorbis_decode_flush(AVCodecContext *avctx) yading@10: { yading@10: vorbis_context *vc = avctx->priv_data; yading@10: yading@10: if (vc->saved) { yading@10: memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels * yading@10: sizeof(*vc->saved)); yading@10: } yading@10: vc->previous_window = 0; yading@10: } yading@10: yading@10: AVCodec ff_vorbis_decoder = { yading@10: .name = "vorbis", yading@10: .type = AVMEDIA_TYPE_AUDIO, yading@10: .id = AV_CODEC_ID_VORBIS, yading@10: .priv_data_size = sizeof(vorbis_context), yading@10: .init = vorbis_decode_init, yading@10: .close = vorbis_decode_close, yading@10: .decode = vorbis_decode_frame, yading@10: .flush = vorbis_decode_flush, yading@10: .capabilities = CODEC_CAP_DR1, yading@10: .long_name = NULL_IF_CONFIG_SMALL("Vorbis"), yading@10: .channel_layouts = ff_vorbis_channel_layouts, yading@10: .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, yading@10: AV_SAMPLE_FMT_NONE }, yading@10: };