From 046f3cb78903cd04846c49345b473244f095f1a5 Mon Sep 17 00:00:00 2001 From: Diego Biurrun Date: Sun, 17 Apr 2011 19:44:33 +0200 Subject: vorbis: Rename decoder/encoder files to follow general file naming scheme. --- libavcodec/vorbisdec.c | 1668 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1668 insertions(+) create mode 100644 libavcodec/vorbisdec.c (limited to 'libavcodec/vorbisdec.c') diff --git a/libavcodec/vorbisdec.c b/libavcodec/vorbisdec.c new file mode 100644 index 0000000000..5fa7be1365 --- /dev/null +++ b/libavcodec/vorbisdec.c @@ -0,0 +1,1668 @@ +/** + * @file + * Vorbis I decoder + * @author Denes Balatoni ( dbalatoni programozo hu ) + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#undef V_DEBUG +//#define V_DEBUG +//#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__) + +#include + +#define ALT_BITSTREAM_READER_LE +#include "avcodec.h" +#include "get_bits.h" +#include "dsputil.h" +#include "fft.h" +#include "fmtconvert.h" + +#include "vorbis.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) + +#ifndef V_DEBUG +#define AV_DEBUG(...) +#endif + +#undef NDEBUG +#include + +typedef struct { + uint_fast8_t dimensions; + uint_fast8_t lookup_type; + uint_fast8_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 { + uint_fast8_t floor_type; + vorbis_floor_decode_func decode; + union vorbis_floor_u { + struct vorbis_floor0_s { + uint_fast8_t order; + uint_fast16_t rate; + uint_fast16_t bark_map_size; + int_fast32_t *map[2]; + uint_fast32_t map_size[2]; + uint_fast8_t amplitude_bits; + uint_fast8_t amplitude_offset; + uint_fast8_t num_books; + uint_fast8_t *book_list; + float *lsp; + } t0; + struct vorbis_floor1_s { + uint_fast8_t partitions; + uint8_t partition_class[32]; + uint_fast8_t class_dimensions[16]; + uint_fast8_t class_subclasses[16]; + uint_fast8_t class_masterbook[16]; + int_fast16_t subclass_books[16][8]; + uint_fast8_t multiplier; + uint_fast16_t x_list_dim; + vorbis_floor1_entry *list; + } t1; + } data; +} vorbis_floor; + +typedef struct { + uint_fast16_t type; + uint_fast32_t begin; + uint_fast32_t end; + unsigned partition_size; + uint_fast8_t classifications; + uint_fast8_t classbook; + int_fast16_t books[64][8]; + uint_fast8_t maxpass; + uint_fast16_t ptns_to_read; + uint8_t *classifs; +} vorbis_residue; + +typedef struct { + uint_fast8_t submaps; + uint_fast16_t coupling_steps; + uint_fast8_t *magnitude; + uint_fast8_t *angle; + uint_fast8_t *mux; + uint_fast8_t submap_floor[16]; + uint_fast8_t submap_residue[16]; +} vorbis_mapping; + +typedef struct { + uint_fast8_t blockflag; + uint_fast16_t windowtype; + uint_fast16_t transformtype; + uint_fast8_t mapping; +} vorbis_mode; + +typedef struct vorbis_context_s { + AVCodecContext *avccontext; + GetBitContext gb; + DSPContext dsp; + FmtConvertContext fmt_conv; + + FFTContext mdct[2]; + uint_fast8_t first_frame; + uint_fast32_t version; + uint_fast8_t audio_channels; + uint_fast32_t audio_samplerate; + uint_fast32_t bitrate_maximum; + uint_fast32_t bitrate_nominal; + uint_fast32_t bitrate_minimum; + uint_fast32_t blocksize[2]; + const float *win[2]; + uint_fast16_t codebook_count; + vorbis_codebook *codebooks; + uint_fast8_t floor_count; + vorbis_floor *floors; + uint_fast8_t residue_count; + vorbis_residue *residues; + uint_fast8_t mapping_count; + vorbis_mapping *mappings; + uint_fast8_t mode_count; + vorbis_mode *modes; + uint_fast8_t mode_number; // mode number for the current packet + uint_fast8_t previous_window; + float *channel_residues; + float *channel_floors; + float *saved; + float scale_bias; // for float->int conversion +} 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->avccontext, AV_LOG_ERROR,\ + idx_err_str,\ + (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\ + return -1;\ + } +#define GET_VALIDATED_INDEX(idx, bits, limit) \ + {\ + idx = get_bits(gb, bits);\ + VALIDATE_INDEX(idx, limit)\ + } + +static float vorbisfloat2float(uint_fast32_t 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_fast16_t i; + + av_freep(&vc->channel_residues); + av_freep(&vc->channel_floors); + av_freep(&vc->saved); + + for (i = 0; i < vc->residue_count; i++) + av_free(vc->residues[i].classifs); + av_freep(&vc->residues); + av_freep(&vc->modes); + + ff_mdct_end(&vc->mdct[0]); + ff_mdct_end(&vc->mdct[1]); + + for (i = 0; i < vc->codebook_count; ++i) { + av_free(vc->codebooks[i].codevectors); + free_vlc(&vc->codebooks[i].vlc); + } + av_freep(&vc->codebooks); + + for (i = 0; i < vc->floor_count; ++i) { + if (vc->floors[i].floor_type == 0) { + av_free(vc->floors[i].data.t0.map[0]); + av_free(vc->floors[i].data.t0.map[1]); + av_free(vc->floors[i].data.t0.book_list); + av_free(vc->floors[i].data.t0.lsp); + } else { + av_free(vc->floors[i].data.t1.list); + } + } + av_freep(&vc->floors); + + for (i = 0; i < vc->mapping_count; ++i) { + av_free(vc->mappings[i].magnitude); + av_free(vc->mappings[i].angle); + av_free(vc->mappings[i].mux); + } + av_freep(&vc->mappings); +} + +// Parse setup header ------------------------------------------------- + +// Process codebooks part + +static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) +{ + uint_fast16_t cb; + uint8_t *tmp_vlc_bits; + uint32_t *tmp_vlc_codes; + GetBitContext *gb = &vc->gb; + uint_fast16_t *codebook_multiplicands; + + vc->codebook_count = get_bits(gb, 8) + 1; + + AV_DEBUG(" Codebooks: %d \n", vc->codebook_count); + + vc->codebooks = av_mallocz(vc->codebook_count * sizeof(vorbis_codebook)); + tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(uint8_t)); + tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(uint32_t)); + codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands)); + + for (cb = 0; cb < vc->codebook_count; ++cb) { + vorbis_codebook *codebook_setup = &vc->codebooks[cb]; + uint_fast8_t ordered; + uint_fast32_t t, used_entries = 0; + uint_fast32_t entries; + + AV_DEBUG(" %d. Codebook \n", cb); + + if (get_bits(gb, 24) != 0x564342) { + av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb); + goto error; + } + + codebook_setup->dimensions=get_bits(gb, 16); + if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) { + av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is invalid (%d). \n", cb, codebook_setup->dimensions); + goto error; + } + entries = get_bits(gb, 24); + if (entries > V_MAX_VLCS) { + av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries); + goto error; + } + + ordered = get_bits1(gb); + + AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries); + + if (!ordered) { + uint_fast16_t ce; + uint_fast8_t flag; + uint_fast8_t sparse = get_bits1(gb); + + AV_DEBUG(" not ordered \n"); + + if (sparse) { + AV_DEBUG(" 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 { + AV_DEBUG(" not sparse \n"); + + used_entries = entries; + for (ce = 0; ce < entries; ++ce) + tmp_vlc_bits[ce] = get_bits(gb, 5) + 1; + } + } else { + uint_fast16_t current_entry = 0; + uint_fast8_t current_length = get_bits(gb, 5)+1; + + AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME + + used_entries = entries; + for (; current_entry < used_entries && current_length <= 32; ++current_length) { + uint_fast16_t i, number; + + AV_DEBUG(" number bits: %d ", ilog(entries - current_entry)); + + number = get_bits(gb, ilog(entries - current_entry)); + + AV_DEBUG(" number: %d \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->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n"); + goto error; + } + } + + codebook_setup->lookup_type = get_bits(gb, 4); + + AV_DEBUG(" 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) { + uint_fast16_t i, j, k; + uint_fast16_t 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)); + uint_fast8_t codebook_value_bits = get_bits(gb, 4)+1; + uint_fast8_t codebook_sequence_p = get_bits1(gb); + + AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values); + AV_DEBUG(" 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); + + AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value); + AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]); + } + +// Weed out unused vlcs and build codevector vector + codebook_setup->codevectors = used_entries ? av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float)) : NULL; + for (j = 0, i = 0; i < entries; ++i) { + uint_fast8_t dim = codebook_setup->dimensions; + + if (tmp_vlc_bits[i]) { + float last = 0.0; + uint_fast32_t lookup_offset = i; + +#ifdef V_DEBUG + av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i); +#endif + + for (k = 0; k < dim; ++k) { + uint_fast32_t 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]; + +#ifdef V_DEBUG + av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j); + for (k = 0; k < dim; ++k) + av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j * dim + k]); + av_log(vc->avccontext, AV_LOG_INFO, "\n"); +#endif + + ++j; + } + } + if (j != used_entries) { + av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n"); + goto error; + } + entries = used_entries; + } else if (codebook_setup->lookup_type >= 2) { + av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n"); + goto error; + } + +// Initialize VLC table + if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) { + av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n"); + 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 (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->avccontext, 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 -1; +} + +// Process time domain transforms part (unused in Vorbis I) + +static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) +{ + GetBitContext *gb = &vc->gb; + uint_fast8_t i; + uint_fast8_t vorbis_time_count = get_bits(gb, 6) + 1; + + for (i = 0; i < vorbis_time_count; ++i) { + uint_fast16_t vorbis_tdtransform = get_bits(gb, 16); + + AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform); + + if (vorbis_tdtransform) { + av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n"); + return -1; + } + } + return 0; +} + +// Process floors part + +static int vorbis_floor0_decode(vorbis_context *vc, + vorbis_floor_data *vfu, float *vec); +static void create_map(vorbis_context *vc, uint_fast8_t 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; + + vc->floor_count = get_bits(gb, 6) + 1; + + vc->floors = av_mallocz(vc->floor_count * sizeof(vorbis_floor)); + + for (i = 0; i < vc->floor_count; ++i) { + vorbis_floor *floor_setup = &vc->floors[i]; + + floor_setup->floor_type = get_bits(gb, 16); + + AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type); + + if (floor_setup->floor_type == 1) { + int maximum_class = -1; + uint_fast8_t rangebits; + uint_fast32_t rangemax; + uint_fast16_t floor1_values = 2; + + floor_setup->decode = vorbis_floor1_decode; + + floor_setup->data.t1.partitions = get_bits(gb, 5); + + AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions); + + for (j = 0; j < floor_setup->data.t1.partitions; ++j) { + floor_setup->data.t1.partition_class[j] = get_bits(gb, 4); + if (floor_setup->data.t1.partition_class[j] > maximum_class) + maximum_class = floor_setup->data.t1.partition_class[j]; + + AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]); + + } + + AV_DEBUG(" maximum class %d \n", maximum_class); + + for (j = 0; j <= maximum_class; ++j) { + floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1; + floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2); + + AV_DEBUG(" %d floor %d class dim: %d subclasses %d \n", i, j, floor_setup->data.t1.class_dimensions[j], floor_setup->data.t1.class_subclasses[j]); + + if (floor_setup->data.t1.class_subclasses[j]) { + GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count) + + AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]); + } + + for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) { + 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; + + AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]); + } + } + + floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1; + floor_setup->data.t1.x_list_dim = 2; + + for (j = 0; j < floor_setup->data.t1.partitions; ++j) + floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; + + floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(vorbis_floor1_entry)); + + + rangebits = get_bits(gb, 4); + rangemax = (1 << rangebits); + if (rangemax > vc->blocksize[1] / 2) { + av_log(vc->avccontext, AV_LOG_ERROR, + "Floor value is too large for blocksize: %d (%d)\n", + rangemax, vc->blocksize[1] / 2); + return -1; + } + 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); + + AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x); + } + } + +// Precalculate order of x coordinates - needed for decode + ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim); + } else if (floor_setup->floor_type == 0) { + uint_fast8_t max_codebook_dim = 0; + + floor_setup->decode = vorbis_floor0_decode; + + floor_setup->data.t0.order = get_bits(gb, 8); + floor_setup->data.t0.rate = get_bits(gb, 16); + floor_setup->data.t0.bark_map_size = get_bits(gb, 16); + floor_setup->data.t0.amplitude_bits = get_bits(gb, 6); + /* zero would result in a div by zero later * + * 2^0 - 1 == 0 */ + if (floor_setup->data.t0.amplitude_bits == 0) { + av_log(vc->avccontext, AV_LOG_ERROR, + "Floor 0 amplitude bits is 0.\n"); + return -1; + } + floor_setup->data.t0.amplitude_offset = get_bits(gb, 8); + floor_setup->data.t0.num_books = get_bits(gb, 4) + 1; + + /* allocate mem for booklist */ + floor_setup->data.t0.book_list = + av_malloc(floor_setup->data.t0.num_books); + if (!floor_setup->data.t0.book_list) + return -1; + /* read book indexes */ + { + int idx; + uint_fast8_t book_idx; + for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) { + 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; + } + } + + create_map(vc, i); + + /* codebook dim is for padding if codebook dim doesn't * + * divide order+1 then we need to read more data */ + floor_setup->data.t0.lsp = + av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim) + * sizeof(float)); + if (!floor_setup->data.t0.lsp) + return -1; + +#ifdef V_DEBUG /* debug output parsed headers */ + AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order); + AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate); + AV_DEBUG("floor0 bark map size: %u\n", + floor_setup->data.t0.bark_map_size); + AV_DEBUG("floor0 amplitude bits: %u\n", + floor_setup->data.t0.amplitude_bits); + AV_DEBUG("floor0 amplitude offset: %u\n", + floor_setup->data.t0.amplitude_offset); + AV_DEBUG("floor0 number of books: %u\n", + floor_setup->data.t0.num_books); + AV_DEBUG("floor0 book list pointer: %p\n", + floor_setup->data.t0.book_list); + { + int idx; + for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) { + AV_DEBUG(" Book %d: %u\n", + idx+1, + floor_setup->data.t0.book_list[idx]); + } + } +#endif + } else { + av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n"); + return -1; + } + } + return 0; +} + +// Process residues part + +static int vorbis_parse_setup_hdr_residues(vorbis_context *vc) +{ + GetBitContext *gb = &vc->gb; + uint_fast8_t i, j, k; + + vc->residue_count = get_bits(gb, 6)+1; + vc->residues = av_mallocz(vc->residue_count * sizeof(vorbis_residue)); + + AV_DEBUG(" There are %d residues. \n", vc->residue_count); + + for (i = 0; i < vc->residue_count; ++i) { + vorbis_residue *res_setup = &vc->residues[i]; + uint_fast8_t cascade[64]; + uint_fast8_t high_bits; + uint_fast8_t low_bits; + + res_setup->type = get_bits(gb, 16); + + AV_DEBUG(" %d. 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 > vc->avccontext->channels * vc->blocksize[1] / 2 || + (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) { + av_log(vc->avccontext, AV_LOG_ERROR, "partition out of bounds: type, begin, end, size, blocksize: %"PRIdFAST16", %"PRIdFAST32", %"PRIdFAST32", %u, %"PRIdFAST32"\n", res_setup->type, res_setup->begin, res_setup->end, res_setup->partition_size, vc->blocksize[1] / 2); + return -1; + } + + 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(res_setup->ptns_to_read * + vc->audio_channels * + sizeof(*res_setup->classifs)); + if (!res_setup->classifs) + return AVERROR(ENOMEM); + + AV_DEBUG(" begin %d end %d part.size %d classif.s %d classbook %d \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; + + AV_DEBUG(" %d class casscade 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) + + AV_DEBUG(" %d class casscade depth %d 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; + uint_fast8_t i, j; + + vc->mapping_count = get_bits(gb, 6)+1; + vc->mappings = av_mallocz(vc->mapping_count * sizeof(vorbis_mapping)); + + AV_DEBUG(" There are %d mappings. \n", vc->mapping_count); + + for (i = 0; i < vc->mapping_count; ++i) { + vorbis_mapping *mapping_setup = &vc->mappings[i]; + + if (get_bits(gb, 16)) { + av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n"); + return -1; + } + if (get_bits1(gb)) { + mapping_setup->submaps = get_bits(gb, 4) + 1; + } else { + mapping_setup->submaps = 1; + } + + if (get_bits1(gb)) { + mapping_setup->coupling_steps = get_bits(gb, 8) + 1; + mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t)); + mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t)); + 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; + } + + AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps); + + if (get_bits(gb, 2)) { + av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i); + return -1; // following spec. + } + + if (mapping_setup->submaps>1) { + mapping_setup->mux = av_mallocz(vc->audio_channels * sizeof(uint_fast8_t)); + for (j = 0; j < vc->audio_channels; ++j) + mapping_setup->mux[j] = get_bits(gb, 4); + } + + for (j = 0; j < mapping_setup->submaps; ++j) { + skip_bits(gb, 8); // FIXME check? + GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count) + GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count) + + AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]); + } + } + return 0; +} + +// Process modes part + +static void create_map(vorbis_context *vc, uint_fast8_t floor_number) +{ + vorbis_floor *floors = vc->floors; + vorbis_floor0 *vf; + int idx; + int_fast8_t blockflag; + int_fast32_t *map; + int_fast32_t n; //TODO: could theoretically be smaller? + + for (blockflag = 0; blockflag < 2; ++blockflag) { + n = vc->blocksize[blockflag] / 2; + floors[floor_number].data.t0.map[blockflag] = + av_malloc((n+1) * sizeof(int_fast32_t)); // n + sentinel + + 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; + } + +#ifdef V_DEBUG + for (idx = 0; idx <= n; ++idx) { + AV_DEBUG("floor0 map: map at pos %d is %d\n", + idx, map[idx]); + } +#endif +} + +static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) +{ + GetBitContext *gb = &vc->gb; + uint_fast8_t i; + + vc->mode_count = get_bits(gb, 6) + 1; + vc->modes = av_mallocz(vc->mode_count * sizeof(vorbis_mode)); + + AV_DEBUG(" 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); + + AV_DEBUG(" %d 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; + + 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->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n"); + return -1; + } + + if (vorbis_parse_setup_hdr_codebooks(vc)) { + av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n"); + return -2; + } + if (vorbis_parse_setup_hdr_tdtransforms(vc)) { + av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n"); + return -3; + } + if (vorbis_parse_setup_hdr_floors(vc)) { + av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n"); + return -4; + } + if (vorbis_parse_setup_hdr_residues(vc)) { + av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n"); + return -5; + } + if (vorbis_parse_setup_hdr_mappings(vc)) { + av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n"); + return -6; + } + if (vorbis_parse_setup_hdr_modes(vc)) { + av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n"); + return -7; + } + if (!get_bits1(gb)) { + av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n"); + return -8; // framing flag bit unset error + } + + return 0; +} + +// Process the identification header + +static int vorbis_parse_id_hdr(vorbis_context *vc) +{ + GetBitContext *gb = &vc->gb; + uint_fast8_t 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->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n"); + return -1; + } + + 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->avccontext, AV_LOG_ERROR, "Invalid number of channels\n"); + return -1; + } + vc->audio_samplerate = get_bits_long(gb, 32); + if (vc->audio_samplerate <= 0) { + av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n"); + return -1; + } + 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); + vc->blocksize[0] = (1 << bl0); + vc->blocksize[1] = (1 << bl1); + if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) { + av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n"); + return -3; + } + // output format int16 + if (vc->blocksize[1] / 2 * vc->audio_channels * 2 > AVCODEC_MAX_AUDIO_FRAME_SIZE) { + av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes " + "output packets too large.\n"); + return -4; + } + vc->win[0] = ff_vorbis_vwin[bl0 - 6]; + vc->win[1] = ff_vorbis_vwin[bl1 - 6]; + + if ((get_bits1(gb)) == 0) { + av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n"); + return -2; + } + + vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(float)); + vc->channel_floors = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(float)); + vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(float)); + vc->previous_window = 0; + + ff_mdct_init(&vc->mdct[0], bl0, 1, -vc->scale_bias); + ff_mdct_init(&vc->mdct[1], bl1, 1, -vc->scale_bias); + + AV_DEBUG(" 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 ", + 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 *avccontext) +{ + vorbis_context *vc = avccontext->priv_data ; + uint8_t *headers = avccontext->extradata; + int headers_len = avccontext->extradata_size; + uint8_t *header_start[3]; + int header_len[3]; + GetBitContext *gb = &(vc->gb); + int hdr_type; + + vc->avccontext = avccontext; + dsputil_init(&vc->dsp, avccontext); + ff_fmt_convert_init(&vc->fmt_conv, avccontext); + + vc->scale_bias = 32768.0f; + + if (!headers_len) { + av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n"); + return -1; + } + + if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) { + av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n"); + return -1; + } + + init_get_bits(gb, header_start[0], header_len[0]*8); + hdr_type = get_bits(gb, 8); + if (hdr_type != 1) { + av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n"); + return -1; + } + if (vorbis_parse_id_hdr(vc)) { + av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n"); + vorbis_free(vc); + return -1; + } + + init_get_bits(gb, header_start[2], header_len[2]*8); + hdr_type = get_bits(gb, 8); + if (hdr_type != 5) { + av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n"); + vorbis_free(vc); + return -1; + } + if (vorbis_parse_setup_hdr(vc)) { + av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n"); + vorbis_free(vc); + return -1; + } + + if (vc->audio_channels > 8) + avccontext->channel_layout = 0; + else + avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1]; + + avccontext->channels = vc->audio_channels; + avccontext->sample_rate = vc->audio_samplerate; + avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1]) >> 2; + avccontext->sample_fmt = AV_SAMPLE_FMT_S16; + + 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; + uint_fast32_t amplitude; + uint_fast32_t book_idx; + uint_fast8_t blockflag = vc->modes[vc->mode_number].blockflag; + + amplitude = get_bits(&vc->gb, vf->amplitude_bits); + if (amplitude > 0) { + float last = 0; + uint_fast16_t lsp_len = 0; + uint_fast16_t idx; + vorbis_codebook codebook; + + book_idx = get_bits(&vc->gb, ilog(vf->num_books)); + if (book_idx >= vf->num_books) { + av_log(vc->avccontext, AV_LOG_ERROR, + "floor0 dec: booknumber too high!\n"); + book_idx = 0; + } + AV_DEBUG("floor0 dec: booknumber: %u\n", book_idx); + codebook = vc->codebooks[vf->book_list[book_idx]]; + /* Invalid codebook! */ + if (!codebook.codevectors) + return -1; + + while (lsp_lenorder) { + int vec_off; + + AV_DEBUG("floor0 dec: book dimension: %d\n", codebook.dimensions); + AV_DEBUG("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) + * codebook.dimensions; + AV_DEBUG("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; + } +#ifdef V_DEBUG + /* DEBUG: output lsp coeffs */ + { + int idx; + for (idx = 0; idx < lsp_len; ++idx) + AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx]); + } +#endif + + /* 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]); + + AV_DEBUG("floor0 synth: map_size = %d; m = %d; wstep = %f\n", + vf->map_size, 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; + } + + /* calculate linear floor value */ + q = exp((((amplitude*vf->amplitude_offset) / + (((1 << 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; + } + + AV_DEBUG(" 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; + uint_fast16_t range_v[4] = { 256, 128, 86, 64 }; + uint_fast16_t range = range_v[vf->multiplier-1]; + uint_fast16_t floor1_Y[258]; + uint_fast16_t floor1_Y_final[258]; + int floor1_flag[258]; + uint_fast8_t class_; + uint_fast8_t cdim; + uint_fast8_t cbits; + uint_fast8_t csub; + uint_fast8_t cval; + int_fast16_t book; + uint_fast16_t offset; + uint_fast16_t i,j; + int_fast16_t adx, ady, dy, off, predicted; + int_fast32_t 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)); + + AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]); + + offset = 2; + for (i = 0; i < vf->partitions; ++i) { + class_ = vf->partition_class[i]; + cdim = vf->class_dimensions[class_]; + cbits = vf->class_subclasses[class_]; + csub = (1 << cbits) - 1; + cval = 0; + + AV_DEBUG("Cbits %d \n", cbits); + + if (cbits) // this reads all subclasses for this partition's class + cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table, + vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3); + + for (j = 0; j < cdim; ++j) { + book = vf->subclass_books[class_][cval & csub]; + + AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb)); + + cval = cval >> cbits; + if (book > -1) { + floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table, + vc->codebooks[book].nb_bits, 3); + } else { + floor1_Y[offset+j] = 0; + } + + AV_DEBUG(" 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) { + uint_fast16_t val, highroom, lowroom, room; + uint_fast16_t high_neigh_offs; + uint_fast16_t 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 mispelling + } + 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] = val - lowroom + predicted; + } else { + floor1_Y_final[i] = predicted - val + highroom - 1; + } + } else { + if (val & 1) { + floor1_Y_final[i] = predicted - (val + 1) / 2; + } else { + floor1_Y_final[i] = predicted + val / 2; + } + } + } else { + floor1_flag[i] = 0; + floor1_Y_final[i] = predicted; + } + + AV_DEBUG(" Decoded floor(%d) = %d / val %d \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); + + AV_DEBUG(" Floor decoded\n"); + + return 0; +} + +// Read and decode residue + +static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc, + vorbis_residue *vr, + uint_fast8_t ch, + uint_fast8_t *do_not_decode, + float *vec, + uint_fast16_t vlen, + int vr_type) +{ + GetBitContext *gb = &vc->gb; + uint_fast8_t c_p_c = vc->codebooks[vr->classbook].dimensions; + uint_fast16_t ptns_to_read = vr->ptns_to_read; + uint8_t *classifs = vr->classifs; + uint_fast8_t pass; + uint_fast8_t ch_used; + uint_fast8_t i,j,l; + uint_fast16_t k; + + 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; + } else { + ch_used = ch; + } + + AV_DEBUG(" 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? + uint_fast16_t voffset; + uint_fast16_t partition_count; + uint_fast16_t j_times_ptns_to_read; + + voffset = vr->begin; + for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error + if (!pass) { + uint_fast32_t inverse_class = ff_inverse[vr->classifications]; + for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) { + if (!do_not_decode[j]) { + uint_fast32_t temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table, + vc->codebooks[vr->classbook].nb_bits, 3); + + AV_DEBUG("Classword: %d \n", temp); + + assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[] + for (i = 0; i < c_p_c; ++i) { + uint_fast32_t temp2; + + temp2 = (((uint_fast64_t)temp) * inverse_class) >> 32; + if (partition_count + c_p_c - 1 - i < ptns_to_read) + classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications; + temp = temp2; + } + } + j_times_ptns_to_read += ptns_to_read; + } + } + 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) { + uint_fast16_t voffs; + + if (!do_not_decode[j]) { + uint_fast8_t vqclass = classifs[j_times_ptns_to_read+partition_count]; + int_fast16_t vqbook = vr->books[vqclass][pass]; + + if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) { + uint_fast16_t coffs; + unsigned dim = vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64 + uint_fast16_t step = dim == 1 ? vr->partition_size + : FASTDIV(vr->partition_size, dim); + 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) * dim; + for (l = 0; l < dim; ++l) + vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; // FPMATH + } + } 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) * dim; + for (l = 0; l < dim; ++l, ++voffs) { + vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH + + AV_DEBUG(" 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) * 2; + vec[voffs + k ] += codebook.codevectors[coffs ]; // FPMATH + vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; // FPMATH + } + } else if (dim == 4) { + for (k = 0; k < step; ++k, voffs += 2) { + coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4; + vec[voffs ] += codebook.codevectors[coffs ]; // FPMATH + vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; // FPMATH + vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; // FPMATH + vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; // FPMATH + } + } else + for (k = 0; k < step; ++k) { + coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim; + for (l = 0; l < dim; l += 2, voffs++) { + vec[voffs ] += codebook.codevectors[coffs + l ]; // FPMATH + vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; // FPMATH + + AV_DEBUG(" 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) { + voffs = voffset; + + for (k = 0; k < step; ++k) { + coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim; + for (l = 0; l < dim; ++l, ++voffs) { + vec[voffs / ch + (voffs % ch) * vlen] += codebook.codevectors[coffs + l]; // FPMATH FIXME use if and counter instead of / and % + + AV_DEBUG(" 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); + } + } + } + } + } + j_times_ptns_to_read += ptns_to_read; + } + ++partition_count; + voffset += vr->partition_size; + } + } + } + return 0; +} + +static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr, + uint_fast8_t ch, + uint_fast8_t *do_not_decode, + float *vec, uint_fast16_t vlen) +{ + if (vr->type == 2) + return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2); + else if (vr->type == 1) + return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1); + else if (vr->type == 0) + return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0); + else { + av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n"); + return -1; + } +} + +void vorbis_inverse_coupling(float *mag, float *ang, int 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) +{ + GetBitContext *gb = &vc->gb; + FFTContext *mdct; + uint_fast8_t previous_window = vc->previous_window; + uint_fast8_t mode_number; + uint_fast8_t blockflag; + uint_fast16_t blocksize; + int_fast32_t i,j; + uint_fast8_t no_residue[255]; + uint_fast8_t do_not_decode[255]; + vorbis_mapping *mapping; + float *ch_res_ptr = vc->channel_residues; + float *ch_floor_ptr = vc->channel_floors; + uint_fast8_t res_chan[255]; + uint_fast8_t res_num = 0; + int_fast16_t retlen = 0; + + if (get_bits1(gb)) { + av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n"); + return -1; // 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]; + + AV_DEBUG(" Mode number: %d , 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]; + if (blockflag) + skip_bits(gb, 2); // previous_window, next_window + + memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ? + memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //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, ch_floor_ptr); + + if (ret < 0) { + av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n"); + return -1; + } + no_residue[i] = ret; + ch_floor_ptr += blocksize / 2; + } + +// 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; + uint_fast8_t ch = 0; + + 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]]; + vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2); + + ch_res_ptr += ch * blocksize / 2; + } + +// 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_floor_ptr = vc->channel_floors + j * blocksize / 2; + ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2; + vc->dsp.vector_fmul(ch_floor_ptr, ch_floor_ptr, ch_res_ptr, blocksize / 2); + mdct->imdct_half(mdct, ch_res_ptr, ch_floor_ptr); + } + +// Overlap/add, save data for next overlapping FPMATH + + retlen = (blocksize + vc->blocksize[previous_window]) / 4; + for (j = 0; j < vc->audio_channels; j++) { + uint_fast16_t bs0 = vc->blocksize[0]; + uint_fast16_t bs1 = vc->blocksize[1]; + float *residue = vc->channel_residues + res_chan[j] * blocksize / 2; + float *saved = vc->saved + j * bs1 / 4; + float *ret = vc->channel_floors + j * retlen; + float *buf = residue; + const float *win = vc->win[blockflag & previous_window]; + + if (blockflag == previous_window) { + vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4); + } else if (blockflag > previous_window) { + vc->dsp.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->dsp.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 *avccontext, + void *data, int *data_size, + AVPacket *avpkt) +{ + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + vorbis_context *vc = avccontext->priv_data ; + GetBitContext *gb = &(vc->gb); + const float *channel_ptrs[255]; + int i; + + int_fast16_t len; + + if (!buf_size) + return 0; + + AV_DEBUG("packet length %d \n", buf_size); + + init_get_bits(gb, buf, buf_size*8); + + len = vorbis_parse_audio_packet(vc); + + if (len <= 0) { + *data_size = 0; + return buf_size; + } + + if (!vc->first_frame) { + vc->first_frame = 1; + *data_size = 0; + return buf_size ; + } + + AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len); + + if (vc->audio_channels > 8) { + for (i = 0; i < vc->audio_channels; i++) + channel_ptrs[i] = vc->channel_floors + i * len; + } else { + for (i = 0; i < vc->audio_channels; i++) + channel_ptrs[i] = vc->channel_floors + + len * ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i]; + } + + vc->fmt_conv.float_to_int16_interleave(data, channel_ptrs, len, + vc->audio_channels); + *data_size = len * 2 * vc->audio_channels; + + return buf_size ; +} + +// Close decoder + +static av_cold int vorbis_decode_close(AVCodecContext *avccontext) +{ + vorbis_context *vc = avccontext->priv_data; + + vorbis_free(vc); + + return 0 ; +} + +AVCodec ff_vorbis_decoder = { + "vorbis", + AVMEDIA_TYPE_AUDIO, + CODEC_ID_VORBIS, + sizeof(vorbis_context), + vorbis_decode_init, + NULL, + vorbis_decode_close, + vorbis_decode_frame, + .long_name = NULL_IF_CONFIG_SMALL("Vorbis"), + .channel_layouts = ff_vorbis_channel_layouts, +}; + -- cgit v1.2.3