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Diffstat (limited to 'ffmpeg/libavcodec/vorbisdec.c')
-rw-r--r--ffmpeg/libavcodec/vorbisdec.c1832
1 files changed, 0 insertions, 1832 deletions
diff --git a/ffmpeg/libavcodec/vorbisdec.c b/ffmpeg/libavcodec/vorbisdec.c
deleted file mode 100644
index a2f7dd2..0000000
--- a/ffmpeg/libavcodec/vorbisdec.c
+++ /dev/null
@@ -1,1832 +0,0 @@
-/**
- * @file
- * Vorbis I decoder
- * @author Denes Balatoni ( dbalatoni programozo hu )
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * Vorbis I decoder
- * @author Denes Balatoni ( dbalatoni programozo hu )
- */
-
-#include <inttypes.h>
-#include <math.h>
-
-#define BITSTREAM_READER_LE
-#include "libavutil/float_dsp.h"
-#include "libavutil/avassert.h"
-#include "avcodec.h"
-#include "get_bits.h"
-#include "fft.h"
-#include "fmtconvert.h"
-#include "internal.h"
-
-#include "vorbis.h"
-#include "vorbisdsp.h"
-#include "xiph.h"
-
-#define V_NB_BITS 8
-#define V_NB_BITS2 11
-#define V_MAX_VLCS (1 << 16)
-#define V_MAX_PARTITIONS (1 << 20)
-
-typedef struct {
- uint8_t dimensions;
- uint8_t lookup_type;
- uint8_t maxdepth;
- VLC vlc;
- float *codevectors;
- unsigned int nb_bits;
-} vorbis_codebook;
-
-typedef union vorbis_floor_u vorbis_floor_data;
-typedef struct vorbis_floor0_s vorbis_floor0;
-typedef struct vorbis_floor1_s vorbis_floor1;
-struct vorbis_context_s;
-typedef
-int (* vorbis_floor_decode_func)
- (struct vorbis_context_s *, vorbis_floor_data *, float *);
-typedef struct {
- uint8_t floor_type;
- vorbis_floor_decode_func decode;
- union vorbis_floor_u {
- struct vorbis_floor0_s {
- uint8_t order;
- uint16_t rate;
- uint16_t bark_map_size;
- int32_t *map[2];
- uint32_t map_size[2];
- uint8_t amplitude_bits;
- uint8_t amplitude_offset;
- uint8_t num_books;
- uint8_t *book_list;
- float *lsp;
- } t0;
- struct vorbis_floor1_s {
- uint8_t partitions;
- uint8_t partition_class[32];
- uint8_t class_dimensions[16];
- uint8_t class_subclasses[16];
- uint8_t class_masterbook[16];
- int16_t subclass_books[16][8];
- uint8_t multiplier;
- uint16_t x_list_dim;
- vorbis_floor1_entry *list;
- } t1;
- } data;
-} vorbis_floor;
-
-typedef struct {
- uint16_t type;
- uint32_t begin;
- uint32_t end;
- unsigned partition_size;
- uint8_t classifications;
- uint8_t classbook;
- int16_t books[64][8];
- uint8_t maxpass;
- uint16_t ptns_to_read;
- uint8_t *classifs;
-} vorbis_residue;
-
-typedef struct {
- uint8_t submaps;
- uint16_t coupling_steps;
- uint8_t *magnitude;
- uint8_t *angle;
- uint8_t *mux;
- uint8_t submap_floor[16];
- uint8_t submap_residue[16];
-} vorbis_mapping;
-
-typedef struct {
- uint8_t blockflag;
- uint16_t windowtype;
- uint16_t transformtype;
- uint8_t mapping;
-} vorbis_mode;
-
-typedef struct vorbis_context_s {
- AVCodecContext *avctx;
- GetBitContext gb;
- VorbisDSPContext dsp;
- AVFloatDSPContext fdsp;
- FmtConvertContext fmt_conv;
-
- FFTContext mdct[2];
- uint8_t first_frame;
- uint32_t version;
- uint8_t audio_channels;
- uint32_t audio_samplerate;
- uint32_t bitrate_maximum;
- uint32_t bitrate_nominal;
- uint32_t bitrate_minimum;
- uint32_t blocksize[2];
- const float *win[2];
- uint16_t codebook_count;
- vorbis_codebook *codebooks;
- uint8_t floor_count;
- vorbis_floor *floors;
- uint8_t residue_count;
- vorbis_residue *residues;
- uint8_t mapping_count;
- vorbis_mapping *mappings;
- uint8_t mode_count;
- vorbis_mode *modes;
- uint8_t mode_number; // mode number for the current packet
- uint8_t previous_window;
- float *channel_residues;
- float *saved;
-} vorbis_context;
-
-/* Helper functions */
-
-#define BARK(x) \
- (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
-
-static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
-#define VALIDATE_INDEX(idx, limit) \
- if (idx >= limit) {\
- av_log(vc->avctx, AV_LOG_ERROR,\
- idx_err_str,\
- (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
- return AVERROR_INVALIDDATA;\
- }
-#define GET_VALIDATED_INDEX(idx, bits, limit) \
- {\
- idx = get_bits(gb, bits);\
- VALIDATE_INDEX(idx, limit)\
- }
-
-static float vorbisfloat2float(unsigned val)
-{
- double mant = val & 0x1fffff;
- long exp = (val & 0x7fe00000L) >> 21;
- if (val & 0x80000000)
- mant = -mant;
- return ldexp(mant, exp - 20 - 768);
-}
-
-
-// Free all allocated memory -----------------------------------------
-
-static void vorbis_free(vorbis_context *vc)
-{
- int i;
-
- av_freep(&vc->channel_residues);
- av_freep(&vc->saved);
-
- if (vc->residues)
- 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]);
-
- if (vc->codebooks)
- for (i = 0; i < vc->codebook_count; ++i) {
- av_free(vc->codebooks[i].codevectors);
- ff_free_vlc(&vc->codebooks[i].vlc);
- }
- av_freep(&vc->codebooks);
-
- if (vc->floors)
- for (i = 0; i < vc->floor_count; ++i) {
- if (vc->floors[i].floor_type == 0) {
- av_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);
-
- if (vc->mappings)
- 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)
-{
- unsigned cb;
- uint8_t *tmp_vlc_bits = NULL;
- uint32_t *tmp_vlc_codes = NULL;
- GetBitContext *gb = &vc->gb;
- uint16_t *codebook_multiplicands = NULL;
- int ret = 0;
-
- vc->codebook_count = get_bits(gb, 8) + 1;
-
- av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
-
- vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
- tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
- tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
- codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
- if (!vc->codebooks ||
- !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
- ret = AVERROR(ENOMEM);
- goto error;
- }
-
- for (cb = 0; cb < vc->codebook_count; ++cb) {
- vorbis_codebook *codebook_setup = &vc->codebooks[cb];
- unsigned ordered, t, entries, used_entries = 0;
-
- av_dlog(NULL, " %u. Codebook\n", cb);
-
- if (get_bits(gb, 24) != 0x564342) {
- av_log(vc->avctx, AV_LOG_ERROR,
- " %u. Codebook setup data corrupt.\n", cb);
- ret = AVERROR_INVALIDDATA;
- goto error;
- }
-
- codebook_setup->dimensions=get_bits(gb, 16);
- if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
- av_log(vc->avctx, AV_LOG_ERROR,
- " %u. Codebook's dimension is invalid (%d).\n",
- cb, codebook_setup->dimensions);
- ret = AVERROR_INVALIDDATA;
- goto error;
- }
- entries = get_bits(gb, 24);
- if (entries > V_MAX_VLCS) {
- av_log(vc->avctx, AV_LOG_ERROR,
- " %u. Codebook has too many entries (%u).\n",
- cb, entries);
- ret = AVERROR_INVALIDDATA;
- goto error;
- }
-
- ordered = get_bits1(gb);
-
- av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
- codebook_setup->dimensions, entries);
-
- if (!ordered) {
- unsigned ce, flag;
- unsigned sparse = get_bits1(gb);
-
- av_dlog(NULL, " not ordered \n");
-
- if (sparse) {
- av_dlog(NULL, " sparse \n");
-
- used_entries = 0;
- for (ce = 0; ce < entries; ++ce) {
- flag = get_bits1(gb);
- if (flag) {
- tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
- ++used_entries;
- } else
- tmp_vlc_bits[ce] = 0;
- }
- } else {
- av_dlog(NULL, " not sparse \n");
-
- used_entries = entries;
- for (ce = 0; ce < entries; ++ce)
- tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
- }
- } else {
- unsigned current_entry = 0;
- unsigned current_length = get_bits(gb, 5) + 1;
-
- av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
-
- used_entries = entries;
- for (; current_entry < used_entries && current_length <= 32; ++current_length) {
- unsigned i, number;
-
- av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
-
- number = get_bits(gb, ilog(entries - current_entry));
-
- av_dlog(NULL, " number: %u\n", number);
-
- for (i = current_entry; i < number+current_entry; ++i)
- if (i < used_entries)
- tmp_vlc_bits[i] = current_length;
-
- current_entry+=number;
- }
- if (current_entry>used_entries) {
- av_log(vc->avctx, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
- ret = AVERROR_INVALIDDATA;
- goto error;
- }
- }
-
- codebook_setup->lookup_type = get_bits(gb, 4);
-
- av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
- codebook_setup->lookup_type ? "vq" : "no lookup");
-
-// If the codebook is used for (inverse) VQ, calculate codevectors.
-
- if (codebook_setup->lookup_type == 1) {
- unsigned i, j, k;
- unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
-
- float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
- float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
- unsigned codebook_value_bits = get_bits(gb, 4) + 1;
- unsigned codebook_sequence_p = get_bits1(gb);
-
- av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
- codebook_lookup_values);
- av_dlog(NULL, " delta %f minmum %f \n",
- codebook_delta_value, codebook_minimum_value);
-
- for (i = 0; i < codebook_lookup_values; ++i) {
- codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
-
- av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
- (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
- av_dlog(NULL, " multiplicand %u\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(*codebook_setup->codevectors))
- : NULL;
- for (j = 0, i = 0; i < entries; ++i) {
- unsigned dim = codebook_setup->dimensions;
-
- if (tmp_vlc_bits[i]) {
- float last = 0.0;
- unsigned lookup_offset = i;
-
- av_dlog(vc->avctx, "Lookup offset %u ,", i);
-
- for (k = 0; k < dim; ++k) {
- unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
- codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
- if (codebook_sequence_p)
- last = codebook_setup->codevectors[j * dim + k];
- lookup_offset/=codebook_lookup_values;
- }
- tmp_vlc_bits[j] = tmp_vlc_bits[i];
-
- av_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
- for (k = 0; k < dim; ++k)
- av_dlog(vc->avctx, " %f ",
- codebook_setup->codevectors[j * dim + k]);
- av_dlog(vc->avctx, "\n");
-
- ++j;
- }
- }
- if (j != used_entries) {
- av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
- ret = AVERROR_INVALIDDATA;
- goto error;
- }
- entries = used_entries;
- } else if (codebook_setup->lookup_type >= 2) {
- av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
- ret = AVERROR_INVALIDDATA;
- goto error;
- }
-
-// Initialize VLC table
- if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
- av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
- ret = AVERROR_INVALIDDATA;
- goto error;
- }
- codebook_setup->maxdepth = 0;
- for (t = 0; t < entries; ++t)
- if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
- codebook_setup->maxdepth = tmp_vlc_bits[t];
-
- if (codebook_setup->maxdepth > 3 * V_NB_BITS)
- codebook_setup->nb_bits = V_NB_BITS2;
- else
- codebook_setup->nb_bits = V_NB_BITS;
-
- codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
-
- if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
- entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
- sizeof(*tmp_vlc_bits), tmp_vlc_codes,
- sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
- INIT_VLC_LE))) {
- av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
- goto error;
- }
- }
-
- av_free(tmp_vlc_bits);
- av_free(tmp_vlc_codes);
- av_free(codebook_multiplicands);
- return 0;
-
-// Error:
-error:
- av_free(tmp_vlc_bits);
- av_free(tmp_vlc_codes);
- av_free(codebook_multiplicands);
- return ret;
-}
-
-// Process time domain transforms part (unused in Vorbis I)
-
-static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
-{
- GetBitContext *gb = &vc->gb;
- unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
-
- for (i = 0; i < vorbis_time_count; ++i) {
- unsigned vorbis_tdtransform = get_bits(gb, 16);
-
- av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
- vorbis_time_count, vorbis_tdtransform);
-
- if (vorbis_tdtransform) {
- av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
- return AVERROR_INVALIDDATA;
- }
- }
- return 0;
-}
-
-// Process floors part
-
-static int vorbis_floor0_decode(vorbis_context *vc,
- vorbis_floor_data *vfu, float *vec);
-static int create_map(vorbis_context *vc, unsigned floor_number);
-static int vorbis_floor1_decode(vorbis_context *vc,
- vorbis_floor_data *vfu, float *vec);
-static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
-{
- GetBitContext *gb = &vc->gb;
- int i, j, k, ret;
-
- vc->floor_count = get_bits(gb, 6) + 1;
-
- vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
- if (!vc->floors)
- return AVERROR(ENOMEM);
-
- for (i = 0; i < vc->floor_count; ++i) {
- vorbis_floor *floor_setup = &vc->floors[i];
-
- floor_setup->floor_type = get_bits(gb, 16);
-
- av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
-
- if (floor_setup->floor_type == 1) {
- int maximum_class = -1;
- unsigned rangebits, rangemax, floor1_values = 2;
-
- floor_setup->decode = vorbis_floor1_decode;
-
- floor_setup->data.t1.partitions = get_bits(gb, 5);
-
- av_dlog(NULL, " %d.floor: %d partitions \n",
- i, floor_setup->data.t1.partitions);
-
- for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
- floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
- if (floor_setup->data.t1.partition_class[j] > maximum_class)
- maximum_class = floor_setup->data.t1.partition_class[j];
-
- av_dlog(NULL, " %d. floor %d partition class %d \n",
- i, j, floor_setup->data.t1.partition_class[j]);
-
- }
-
- av_dlog(NULL, " maximum class %d \n", maximum_class);
-
- for (j = 0; j <= maximum_class; ++j) {
- floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
- floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
-
- av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
- floor_setup->data.t1.class_dimensions[j],
- floor_setup->data.t1.class_subclasses[j]);
-
- if (floor_setup->data.t1.class_subclasses[j]) {
- GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
-
- av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
- }
-
- for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
- int16_t bits = get_bits(gb, 8) - 1;
- if (bits != -1)
- VALIDATE_INDEX(bits, vc->codebook_count)
- floor_setup->data.t1.subclass_books[j][k] = bits;
-
- av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
- }
- }
-
- floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
- floor_setup->data.t1.x_list_dim = 2;
-
- for (j = 0; j < floor_setup->data.t1.partitions; ++j)
- floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
-
- floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
- sizeof(*floor_setup->data.t1.list));
- if (!floor_setup->data.t1.list)
- return AVERROR(ENOMEM);
-
- rangebits = get_bits(gb, 4);
- rangemax = (1 << rangebits);
- if (rangemax > vc->blocksize[1] / 2) {
- av_log(vc->avctx, AV_LOG_ERROR,
- "Floor value is too large for blocksize: %u (%"PRIu32")\n",
- rangemax, vc->blocksize[1] / 2);
- return AVERROR_INVALIDDATA;
- }
- floor_setup->data.t1.list[0].x = 0;
- floor_setup->data.t1.list[1].x = rangemax;
-
- for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
- for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
- floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
-
- av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
- floor_setup->data.t1.list[floor1_values].x);
- }
- }
-
-// Precalculate order of x coordinates - needed for decode
- if (ff_vorbis_ready_floor1_list(vc->avctx,
- floor_setup->data.t1.list,
- floor_setup->data.t1.x_list_dim)) {
- return AVERROR_INVALIDDATA;
- }
- } else if (floor_setup->floor_type == 0) {
- unsigned max_codebook_dim = 0;
-
- floor_setup->decode = vorbis_floor0_decode;
-
- floor_setup->data.t0.order = get_bits(gb, 8);
- if (!floor_setup->data.t0.order) {
- av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
- return AVERROR_INVALIDDATA;
- }
- floor_setup->data.t0.rate = get_bits(gb, 16);
- if (!floor_setup->data.t0.rate) {
- av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
- return AVERROR_INVALIDDATA;
- }
- floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
- if (!floor_setup->data.t0.bark_map_size) {
- av_log(vc->avctx, AV_LOG_ERROR,
- "Floor 0 bark map size is 0.\n");
- return AVERROR_INVALIDDATA;
- }
- floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
- floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
- floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
-
- /* allocate mem for booklist */
- floor_setup->data.t0.book_list =
- av_malloc(floor_setup->data.t0.num_books);
- if (!floor_setup->data.t0.book_list)
- return AVERROR(ENOMEM);
- /* read book indexes */
- {
- int idx;
- unsigned book_idx;
- for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
- GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
- floor_setup->data.t0.book_list[idx] = book_idx;
- if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
- max_codebook_dim = vc->codebooks[book_idx].dimensions;
- }
- }
-
- if ((ret = create_map(vc, i)) < 0)
- return ret;
-
- /* codebook dim is for padding if codebook dim doesn't *
- * divide order+1 then we need to read more data */
- floor_setup->data.t0.lsp =
- av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
- * sizeof(*floor_setup->data.t0.lsp));
- if (!floor_setup->data.t0.lsp)
- return AVERROR(ENOMEM);
-
- /* debug output parsed headers */
- av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
- av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
- av_dlog(NULL, "floor0 bark map size: %u\n",
- floor_setup->data.t0.bark_map_size);
- av_dlog(NULL, "floor0 amplitude bits: %u\n",
- floor_setup->data.t0.amplitude_bits);
- av_dlog(NULL, "floor0 amplitude offset: %u\n",
- floor_setup->data.t0.amplitude_offset);
- av_dlog(NULL, "floor0 number of books: %u\n",
- floor_setup->data.t0.num_books);
- av_dlog(NULL, "floor0 book list pointer: %p\n",
- floor_setup->data.t0.book_list);
- {
- int idx;
- for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
- av_dlog(NULL, " Book %d: %u\n", idx + 1,
- floor_setup->data.t0.book_list[idx]);
- }
- }
- } else {
- av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
- return AVERROR_INVALIDDATA;
- }
- }
- return 0;
-}
-
-// Process residues part
-
-static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
-{
- GetBitContext *gb = &vc->gb;
- unsigned i, j, k;
-
- vc->residue_count = get_bits(gb, 6)+1;
- vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
- if (!vc->residues)
- return AVERROR(ENOMEM);
-
- av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
-
- for (i = 0; i < vc->residue_count; ++i) {
- vorbis_residue *res_setup = &vc->residues[i];
- uint8_t cascade[64];
- unsigned high_bits, low_bits;
-
- res_setup->type = get_bits(gb, 16);
-
- av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
-
- res_setup->begin = get_bits(gb, 24);
- res_setup->end = get_bits(gb, 24);
- res_setup->partition_size = get_bits(gb, 24) + 1;
- /* Validations to prevent a buffer overflow later. */
- if (res_setup->begin>res_setup->end ||
- res_setup->end > (res_setup->type == 2 ? vc->audio_channels : 1) * vc->blocksize[1] / 2 ||
- (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
- av_log(vc->avctx, AV_LOG_ERROR,
- "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
- res_setup->type, res_setup->begin, res_setup->end,
- res_setup->partition_size, vc->blocksize[1] / 2);
- return AVERROR_INVALIDDATA;
- }
-
- res_setup->classifications = get_bits(gb, 6) + 1;
- GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
-
- res_setup->ptns_to_read =
- (res_setup->end - res_setup->begin) / res_setup->partition_size;
- res_setup->classifs = av_malloc(res_setup->ptns_to_read *
- vc->audio_channels *
- sizeof(*res_setup->classifs));
- if (!res_setup->classifs)
- return AVERROR(ENOMEM);
-
- av_dlog(NULL, " 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_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
- }
-
- res_setup->maxpass = 0;
- for (j = 0; j < res_setup->classifications; ++j) {
- for (k = 0; k < 8; ++k) {
- if (cascade[j]&(1 << k)) {
- GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
-
- av_dlog(NULL, " %u class cascade depth %u book: %d\n",
- j, k, res_setup->books[j][k]);
-
- if (k>res_setup->maxpass)
- res_setup->maxpass = k;
- } else {
- res_setup->books[j][k] = -1;
- }
- }
- }
- }
- return 0;
-}
-
-// Process mappings part
-
-static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
-{
- GetBitContext *gb = &vc->gb;
- unsigned i, j;
-
- vc->mapping_count = get_bits(gb, 6)+1;
- vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
- if (!vc->mappings)
- return AVERROR(ENOMEM);
-
- av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
-
- for (i = 0; i < vc->mapping_count; ++i) {
- vorbis_mapping *mapping_setup = &vc->mappings[i];
-
- if (get_bits(gb, 16)) {
- av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
- return AVERROR_INVALIDDATA;
- }
- if (get_bits1(gb)) {
- mapping_setup->submaps = get_bits(gb, 4) + 1;
- } else {
- mapping_setup->submaps = 1;
- }
-
- if (get_bits1(gb)) {
- mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
- mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
- sizeof(*mapping_setup->magnitude));
- mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
- sizeof(*mapping_setup->angle));
- if (!mapping_setup->angle || !mapping_setup->magnitude)
- return AVERROR(ENOMEM);
-
- for (j = 0; j < mapping_setup->coupling_steps; ++j) {
- GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
- GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
- }
- } else {
- mapping_setup->coupling_steps = 0;
- }
-
- av_dlog(NULL, " %u mapping coupling steps: %d\n",
- i, mapping_setup->coupling_steps);
-
- if (get_bits(gb, 2)) {
- av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
- return AVERROR_INVALIDDATA; // following spec.
- }
-
- if (mapping_setup->submaps>1) {
- mapping_setup->mux = av_mallocz(vc->audio_channels *
- sizeof(*mapping_setup->mux));
- if (!mapping_setup->mux)
- return AVERROR(ENOMEM);
-
- for (j = 0; j < vc->audio_channels; ++j)
- mapping_setup->mux[j] = get_bits(gb, 4);
- }
-
- for (j = 0; j < mapping_setup->submaps; ++j) {
- skip_bits(gb, 8); // FIXME check?
- GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
- GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
-
- av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
- mapping_setup->submap_floor[j],
- mapping_setup->submap_residue[j]);
- }
- }
- return 0;
-}
-
-// Process modes part
-
-static int create_map(vorbis_context *vc, unsigned floor_number)
-{
- vorbis_floor *floors = vc->floors;
- vorbis_floor0 *vf;
- int idx;
- int blockflag, n;
- int32_t *map;
-
- for (blockflag = 0; blockflag < 2; ++blockflag) {
- n = vc->blocksize[blockflag] / 2;
- floors[floor_number].data.t0.map[blockflag] =
- av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
- if (!floors[floor_number].data.t0.map[blockflag])
- return AVERROR(ENOMEM);
-
- map = floors[floor_number].data.t0.map[blockflag];
- vf = &floors[floor_number].data.t0;
-
- for (idx = 0; idx < n; ++idx) {
- map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
- (vf->bark_map_size / BARK(vf->rate / 2.0f)));
- if (vf->bark_map_size-1 < map[idx])
- map[idx] = vf->bark_map_size - 1;
- }
- map[n] = -1;
- vf->map_size[blockflag] = n;
- }
-
- for (idx = 0; idx <= n; ++idx) {
- av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
- }
-
- return 0;
-}
-
-static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
-{
- GetBitContext *gb = &vc->gb;
- unsigned i;
-
- vc->mode_count = get_bits(gb, 6) + 1;
- vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
- if (!vc->modes)
- return AVERROR(ENOMEM);
-
- av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
-
- for (i = 0; i < vc->mode_count; ++i) {
- vorbis_mode *mode_setup = &vc->modes[i];
-
- mode_setup->blockflag = get_bits1(gb);
- mode_setup->windowtype = get_bits(gb, 16); //FIXME check
- mode_setup->transformtype = get_bits(gb, 16); //FIXME check
- GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
-
- av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
- i, mode_setup->blockflag, mode_setup->windowtype,
- mode_setup->transformtype, mode_setup->mapping);
- }
- return 0;
-}
-
-// Process the whole setup header using the functions above
-
-static int vorbis_parse_setup_hdr(vorbis_context *vc)
-{
- GetBitContext *gb = &vc->gb;
- int ret;
-
- if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
- (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
- (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
- av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
- return AVERROR_INVALIDDATA;
- }
-
- if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
- av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
- return ret;
- }
- if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
- av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
- return ret;
- }
- if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
- av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
- return ret;
- }
- if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
- av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
- return ret;
- }
- if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
- av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
- return ret;
- }
- if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
- av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
- return ret;
- }
- if (!get_bits1(gb)) {
- av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
- return AVERROR_INVALIDDATA; // framing flag bit unset error
- }
-
- return 0;
-}
-
-// Process the identification header
-
-static int vorbis_parse_id_hdr(vorbis_context *vc)
-{
- GetBitContext *gb = &vc->gb;
- unsigned bl0, bl1;
-
- if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
- (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
- (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
- av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
- return AVERROR_INVALIDDATA;
- }
-
- vc->version = get_bits_long(gb, 32); //FIXME check 0
- vc->audio_channels = get_bits(gb, 8);
- if (vc->audio_channels <= 0) {
- av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
- return AVERROR_INVALIDDATA;
- }
- vc->audio_samplerate = get_bits_long(gb, 32);
- if (vc->audio_samplerate <= 0) {
- av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
- return AVERROR_INVALIDDATA;
- }
- vc->bitrate_maximum = get_bits_long(gb, 32);
- vc->bitrate_nominal = get_bits_long(gb, 32);
- vc->bitrate_minimum = get_bits_long(gb, 32);
- bl0 = get_bits(gb, 4);
- bl1 = get_bits(gb, 4);
- if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
- av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
- return AVERROR_INVALIDDATA;
- }
- vc->blocksize[0] = (1 << bl0);
- vc->blocksize[1] = (1 << bl1);
- vc->win[0] = ff_vorbis_vwin[bl0 - 6];
- vc->win[1] = ff_vorbis_vwin[bl1 - 6];
-
- if ((get_bits1(gb)) == 0) {
- av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
- return AVERROR_INVALIDDATA;
- }
-
- vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
- vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
- if (!vc->channel_residues || !vc->saved)
- return AVERROR(ENOMEM);
-
- vc->previous_window = 0;
-
- ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
- ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
-
- 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 ",
- vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
-
-/*
- BLK = vc->blocksize[0];
- for (i = 0; i < BLK / 2; ++i) {
- vc->win[0][i] = sin(0.5*3.14159265358*(sin(((float)i + 0.5) / (float)BLK*3.14159265358))*(sin(((float)i + 0.5) / (float)BLK*3.14159265358)));
- }
-*/
-
- return 0;
-}
-
-// Process the extradata using the functions above (identification header, setup header)
-
-static av_cold int vorbis_decode_init(AVCodecContext *avctx)
-{
- vorbis_context *vc = avctx->priv_data;
- uint8_t *headers = avctx->extradata;
- int headers_len = avctx->extradata_size;
- uint8_t *header_start[3];
- int header_len[3];
- GetBitContext *gb = &vc->gb;
- int hdr_type, ret;
-
- vc->avctx = avctx;
- ff_vorbisdsp_init(&vc->dsp);
- avpriv_float_dsp_init(&vc->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
- ff_fmt_convert_init(&vc->fmt_conv, avctx);
-
- avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
-
- if (!headers_len) {
- av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
- return AVERROR_INVALIDDATA;
- }
-
- if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
- return ret;
- }
-
- init_get_bits(gb, header_start[0], header_len[0]*8);
- hdr_type = get_bits(gb, 8);
- if (hdr_type != 1) {
- av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
- return AVERROR_INVALIDDATA;
- }
- if ((ret = vorbis_parse_id_hdr(vc))) {
- av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
- vorbis_free(vc);
- return ret;
- }
-
- init_get_bits(gb, header_start[2], header_len[2]*8);
- hdr_type = get_bits(gb, 8);
- if (hdr_type != 5) {
- av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
- vorbis_free(vc);
- return AVERROR_INVALIDDATA;
- }
- if ((ret = vorbis_parse_setup_hdr(vc))) {
- av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
- vorbis_free(vc);
- return ret;
- }
-
- if (vc->audio_channels > 8)
- avctx->channel_layout = 0;
- else
- avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
-
- avctx->channels = vc->audio_channels;
- avctx->sample_rate = vc->audio_samplerate;
-
- return 0;
-}
-
-// Decode audiopackets -------------------------------------------------
-
-// Read and decode floor
-
-static int vorbis_floor0_decode(vorbis_context *vc,
- vorbis_floor_data *vfu, float *vec)
-{
- vorbis_floor0 *vf = &vfu->t0;
- float *lsp = vf->lsp;
- unsigned amplitude, book_idx;
- unsigned blockflag = vc->modes[vc->mode_number].blockflag;
-
- if (!vf->amplitude_bits)
- return 1;
-
- amplitude = get_bits(&vc->gb, vf->amplitude_bits);
- if (amplitude > 0) {
- float last = 0;
- unsigned idx, lsp_len = 0;
- vorbis_codebook codebook;
-
- book_idx = get_bits(&vc->gb, ilog(vf->num_books));
- if (book_idx >= vf->num_books) {
- av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
- book_idx = 0;
- }
- av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
- codebook = vc->codebooks[vf->book_list[book_idx]];
- /* Invalid codebook! */
- if (!codebook.codevectors)
- return AVERROR_INVALIDDATA;
-
- while (lsp_len<vf->order) {
- int vec_off;
-
- av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
- av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
- /* read temp vector */
- vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
- codebook.nb_bits, codebook.maxdepth)
- * codebook.dimensions;
- av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
- /* copy each vector component and add last to it */
- for (idx = 0; idx < codebook.dimensions; ++idx)
- lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
- last = lsp[lsp_len+idx-1]; /* set last to last vector component */
-
- lsp_len += codebook.dimensions;
- }
- /* DEBUG: output lsp coeffs */
- {
- int idx;
- for (idx = 0; idx < lsp_len; ++idx)
- av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
- }
-
- /* synthesize floor output vector */
- {
- int i;
- int order = vf->order;
- float wstep = M_PI / vf->bark_map_size;
-
- for (i = 0; i < order; i++)
- lsp[i] = 2.0f * cos(lsp[i]);
-
- av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
- vf->map_size[blockflag], order, wstep);
-
- i = 0;
- while (i < vf->map_size[blockflag]) {
- int j, iter_cond = vf->map[blockflag][i];
- float p = 0.5f;
- float q = 0.5f;
- float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
-
- /* similar part for the q and p products */
- for (j = 0; j + 1 < order; j += 2) {
- q *= lsp[j] - two_cos_w;
- p *= lsp[j + 1] - two_cos_w;
- }
- if (j == order) { // even order
- p *= p * (2.0f - two_cos_w);
- q *= q * (2.0f + two_cos_w);
- } else { // odd order
- q *= two_cos_w-lsp[j]; // one more time for q
-
- /* final step and square */
- p *= p * (4.f - two_cos_w * two_cos_w);
- q *= q;
- }
-
- /* 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_dlog(NULL, " Floor0 decoded\n");
-
- return 0;
-}
-
-static int vorbis_floor1_decode(vorbis_context *vc,
- vorbis_floor_data *vfu, float *vec)
-{
- vorbis_floor1 *vf = &vfu->t1;
- GetBitContext *gb = &vc->gb;
- uint16_t range_v[4] = { 256, 128, 86, 64 };
- unsigned range = range_v[vf->multiplier - 1];
- uint16_t floor1_Y[258];
- uint16_t floor1_Y_final[258];
- int floor1_flag[258];
- unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
- int book, adx, ady, dy, off, predicted, err;
-
-
- if (!get_bits1(gb)) // silence
- return 1;
-
-// Read values (or differences) for the floor's points
-
- floor1_Y[0] = get_bits(gb, ilog(range - 1));
- floor1_Y[1] = get_bits(gb, ilog(range - 1));
-
- av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
-
- offset = 2;
- for (i = 0; i < vf->partitions; ++i) {
- partition_class = vf->partition_class[i];
- cdim = vf->class_dimensions[partition_class];
- cbits = vf->class_subclasses[partition_class];
- csub = (1 << cbits) - 1;
- cval = 0;
-
- av_dlog(NULL, "Cbits %u\n", cbits);
-
- if (cbits) // this reads all subclasses for this partition's class
- cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
- vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
-
- for (j = 0; j < cdim; ++j) {
- book = vf->subclass_books[partition_class][cval & csub];
-
- av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
- book, cbits, cval, get_bits_count(gb));
-
- cval = cval >> cbits;
- if (book > -1) {
- int v = get_vlc2(gb, vc->codebooks[book].vlc.table,
- vc->codebooks[book].nb_bits, 3);
- if (v < 0)
- return AVERROR_INVALIDDATA;
- floor1_Y[offset+j] = v;
- } else {
- floor1_Y[offset+j] = 0;
- }
-
- av_dlog(NULL, " floor(%d) = %d \n",
- vf->list[offset+j].x, floor1_Y[offset+j]);
- }
- offset+=cdim;
- }
-
-// Amplitude calculation from the differences
-
- floor1_flag[0] = 1;
- floor1_flag[1] = 1;
- floor1_Y_final[0] = floor1_Y[0];
- floor1_Y_final[1] = floor1_Y[1];
-
- for (i = 2; i < vf->x_list_dim; ++i) {
- unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
-
- low_neigh_offs = vf->list[i].low;
- high_neigh_offs = vf->list[i].high;
- dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
- adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
- ady = FFABS(dy);
- err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
- off = err / adx;
- if (dy < 0) {
- predicted = floor1_Y_final[low_neigh_offs] - off;
- } else {
- predicted = floor1_Y_final[low_neigh_offs] + off;
- } // render_point end
-
- val = floor1_Y[i];
- highroom = range-predicted;
- lowroom = predicted;
- if (highroom < lowroom) {
- room = highroom * 2;
- } else {
- room = lowroom * 2; // SPEC misspelling
- }
- if (val) {
- floor1_flag[low_neigh_offs] = 1;
- floor1_flag[high_neigh_offs] = 1;
- floor1_flag[i] = 1;
- if (val >= room) {
- if (highroom > lowroom) {
- floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
- } else {
- floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
- }
- } else {
- if (val & 1) {
- floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
- } else {
- floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
- }
- }
- } else {
- floor1_flag[i] = 0;
- floor1_Y_final[i] = av_clip_uint16(predicted);
- }
-
- av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
- vf->list[i].x, floor1_Y_final[i], val);
- }
-
-// Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
-
- ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
-
- av_dlog(NULL, " Floor decoded\n");
-
- return 0;
-}
-
-static av_always_inline int setup_classifs(vorbis_context *vc,
- vorbis_residue *vr,
- uint8_t *do_not_decode,
- unsigned ch_used,
- int partition_count)
-{
- int p, j, i;
- unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
- unsigned inverse_class = ff_inverse[vr->classifications];
- unsigned temp, temp2;
- for (p = 0, j = 0; j < ch_used; ++j) {
- if (!do_not_decode[j]) {
- temp = get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
- vc->codebooks[vr->classbook].nb_bits, 3);
-
- av_dlog(NULL, "Classword: %u\n", temp);
-
- if ((int)temp < 0)
- return temp;
-
- av_assert0(vr->classifications > 1); //needed for inverse[]
-
- if (temp <= 65536) {
- for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
- temp2 = (((uint64_t)temp) * inverse_class) >> 32;
-
- if (i < vr->ptns_to_read)
- vr->classifs[p + i] = temp - temp2 * vr->classifications;
- temp = temp2;
- }
- } else {
- for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
- temp2 = temp / vr->classifications;
-
- if (i < vr->ptns_to_read)
- vr->classifs[p + i] = temp - temp2 * vr->classifications;
- temp = temp2;
- }
- }
- }
- p += vr->ptns_to_read;
- }
- return 0;
-}
-// Read and decode residue
-
-static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
- vorbis_residue *vr,
- unsigned ch,
- uint8_t *do_not_decode,
- float *vec,
- unsigned vlen,
- unsigned ch_left,
- int vr_type)
-{
- GetBitContext *gb = &vc->gb;
- unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
- uint8_t *classifs = vr->classifs;
- unsigned pass, ch_used, i, j, k, l;
- unsigned max_output = (ch - 1) * vlen;
- int ptns_to_read = vr->ptns_to_read;
-
- if (vr_type == 2) {
- for (j = 1; j < ch; ++j)
- do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
- if (do_not_decode[0])
- return 0;
- ch_used = 1;
- max_output += vr->end / ch;
- } else {
- ch_used = ch;
- max_output += vr->end;
- }
-
- if (max_output > ch_left * vlen) {
- av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
- return AVERROR_INVALIDDATA;
- }
-
- av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
-
- for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
- int voffset, partition_count, j_times_ptns_to_read;
-
- voffset = vr->begin;
- for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
- if (!pass) {
- int ret;
- if ((ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count)) < 0)
- return ret;
- }
- for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
- for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
- unsigned voffs;
-
- if (!do_not_decode[j]) {
- unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
- int vqbook = vr->books[vqclass][pass];
-
- if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
- unsigned coffs;
- unsigned dim = vc->codebooks[vqbook].dimensions;
- unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
- vorbis_codebook codebook = vc->codebooks[vqbook];
-
- if (vr_type == 0) {
-
- voffs = voffset+j*vlen;
- for (k = 0; k < step; ++k) {
- coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
- for (l = 0; l < dim; ++l)
- vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
- }
- } else if (vr_type == 1) {
- voffs = voffset + j * vlen;
- for (k = 0; k < step; ++k) {
- coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
- for (l = 0; l < dim; ++l, ++voffs) {
- vec[voffs]+=codebook.codevectors[coffs+l];
-
- av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
- pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
- }
- }
- } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
- voffs = voffset >> 1;
-
- if (dim == 2) {
- for (k = 0; k < step; ++k) {
- coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
- vec[voffs + k ] += codebook.codevectors[coffs ];
- vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
- }
- } else if (dim == 4) {
- for (k = 0; k < step; ++k, voffs += 2) {
- coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
- vec[voffs ] += codebook.codevectors[coffs ];
- vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
- vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
- vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
- }
- } else
- for (k = 0; k < step; ++k) {
- coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
- for (l = 0; l < dim; l += 2, voffs++) {
- vec[voffs ] += codebook.codevectors[coffs + l ];
- vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
-
- av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
- pass, voffset / ch + (voffs % ch) * vlen,
- vec[voffset / ch + (voffs % ch) * vlen],
- codebook.codevectors[coffs + l], coffs, l);
- }
- }
-
- } else if (vr_type == 2) {
- unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
- unsigned voffs_mod = voffset - voffs_div * ch;
-
- 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_div + voffs_mod * vlen] +=
- codebook.codevectors[coffs + l];
-
- av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
- pass, voffs_div + voffs_mod * vlen,
- vec[voffs_div + voffs_mod * vlen],
- codebook.codevectors[coffs + l], coffs, l);
-
- if (++voffs_mod == ch) {
- voffs_div++;
- voffs_mod = 0;
- }
- }
- }
- }
- }
- }
- j_times_ptns_to_read += ptns_to_read;
- }
- ++partition_count;
- voffset += vr->partition_size;
- }
- }
- }
- return 0;
-}
-
-static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
- unsigned ch,
- uint8_t *do_not_decode,
- float *vec, unsigned vlen,
- unsigned ch_left)
-{
- if (vr->type == 2)
- return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
- else if (vr->type == 1)
- return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
- else if (vr->type == 0)
- return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
- else {
- av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
- return AVERROR_INVALIDDATA;
- }
-}
-
-void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
-{
- int i;
- for (i = 0; i < blocksize; i++) {
- if (mag[i] > 0.0) {
- if (ang[i] > 0.0) {
- ang[i] = mag[i] - ang[i];
- } else {
- float temp = ang[i];
- ang[i] = mag[i];
- mag[i] += temp;
- }
- } else {
- if (ang[i] > 0.0) {
- ang[i] += mag[i];
- } else {
- float temp = ang[i];
- ang[i] = mag[i];
- mag[i] -= temp;
- }
- }
- }
-}
-
-// Decode the audio packet using the functions above
-
-static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
-{
- GetBitContext *gb = &vc->gb;
- FFTContext *mdct;
- unsigned previous_window = vc->previous_window;
- unsigned mode_number, blockflag, blocksize;
- int i, j;
- uint8_t no_residue[255];
- uint8_t do_not_decode[255];
- vorbis_mapping *mapping;
- float *ch_res_ptr = vc->channel_residues;
- uint8_t res_chan[255];
- unsigned res_num = 0;
- int retlen = 0;
- unsigned ch_left = vc->audio_channels;
- unsigned vlen;
-
- if (get_bits1(gb)) {
- av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
- return AVERROR_INVALIDDATA; // packet type not audio
- }
-
- if (vc->mode_count == 1) {
- mode_number = 0;
- } else {
- GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
- }
- vc->mode_number = mode_number;
- mapping = &vc->mappings[vc->modes[mode_number].mapping];
-
- av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
- vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
-
- blockflag = vc->modes[mode_number].blockflag;
- blocksize = vc->blocksize[blockflag];
- vlen = blocksize / 2;
- if (blockflag) {
- previous_window = get_bits(gb, 1);
- skip_bits1(gb); // next_window
- }
-
- memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
- for (i = 0; i < vc->audio_channels; ++i)
- memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
-
-// Decode floor
-
- for (i = 0; i < vc->audio_channels; ++i) {
- vorbis_floor *floor;
- int ret;
- if (mapping->submaps > 1) {
- floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
- } else {
- floor = &vc->floors[mapping->submap_floor[0]];
- }
-
- ret = floor->decode(vc, &floor->data, floor_ptr[i]);
-
- if (ret < 0) {
- av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
- return AVERROR_INVALIDDATA;
- }
- no_residue[i] = ret;
- }
-
-// Nonzero vector propagate
-
- for (i = mapping->coupling_steps - 1; i >= 0; --i) {
- if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
- no_residue[mapping->magnitude[i]] = 0;
- no_residue[mapping->angle[i]] = 0;
- }
- }
-
-// Decode residue
-
- for (i = 0; i < mapping->submaps; ++i) {
- vorbis_residue *residue;
- unsigned ch = 0;
- int ret;
-
- for (j = 0; j < vc->audio_channels; ++j) {
- if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
- res_chan[j] = res_num;
- if (no_residue[j]) {
- do_not_decode[ch] = 1;
- } else {
- do_not_decode[ch] = 0;
- }
- ++ch;
- ++res_num;
- }
- }
- residue = &vc->residues[mapping->submap_residue[i]];
- if (ch_left < ch) {
- av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
- return AVERROR_INVALIDDATA;
- }
- if (ch) {
- ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
- if (ret < 0)
- return ret;
- }
-
- ch_res_ptr += ch * vlen;
- ch_left -= ch;
- }
-
- if (ch_left > 0)
- return AVERROR_INVALIDDATA;
-
-// Inverse coupling
-
- for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
- float *mag, *ang;
-
- mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
- ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
- vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
- }
-
-// Dotproduct, MDCT
-
- mdct = &vc->mdct[blockflag];
-
- for (j = vc->audio_channels-1;j >= 0; j--) {
- ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
- vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
- mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
- }
-
-// Overlap/add, save data for next overlapping
-
- retlen = (blocksize + vc->blocksize[previous_window]) / 4;
- for (j = 0; j < vc->audio_channels; j++) {
- unsigned bs0 = vc->blocksize[0];
- unsigned bs1 = vc->blocksize[1];
- float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
- float *saved = vc->saved + j * bs1 / 4;
- float *ret = floor_ptr[j];
- float *buf = residue;
- const float *win = vc->win[blockflag & previous_window];
-
- if (blockflag == previous_window) {
- vc->fdsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
- } else if (blockflag > previous_window) {
- vc->fdsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
- memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
- } else {
- memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
- vc->fdsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
- }
- memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
- }
-
- vc->previous_window = blockflag;
- return retlen;
-}
-
-// Return the decoded audio packet through the standard api
-
-static int vorbis_decode_frame(AVCodecContext *avctx, void *data,
- int *got_frame_ptr, AVPacket *avpkt)
-{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- vorbis_context *vc = avctx->priv_data;
- AVFrame *frame = data;
- GetBitContext *gb = &vc->gb;
- float *channel_ptrs[255];
- int i, len, ret;
-
- av_dlog(NULL, "packet length %d \n", buf_size);
-
- if (*buf == 1 && buf_size > 7) {
- init_get_bits(gb, buf+1, buf_size*8 - 8);
- vorbis_free(vc);
- if ((ret = vorbis_parse_id_hdr(vc))) {
- av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
- vorbis_free(vc);
- return ret;
- }
-
- if (vc->audio_channels > 8)
- avctx->channel_layout = 0;
- else
- avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
-
- avctx->channels = vc->audio_channels;
- avctx->sample_rate = vc->audio_samplerate;
- return buf_size;
- }
-
- if (*buf == 3 && buf_size > 7) {
- av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
- return buf_size;
- }
-
- if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
- init_get_bits(gb, buf+1, buf_size*8 - 8);
- if ((ret = vorbis_parse_setup_hdr(vc))) {
- av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
- vorbis_free(vc);
- return ret;
- }
- return buf_size;
- }
-
- if (!vc->channel_residues || !vc->modes) {
- av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
- return AVERROR_INVALIDDATA;
- }
-
- /* get output buffer */
- frame->nb_samples = vc->blocksize[1] / 2;
- if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
- return ret;
-
- if (vc->audio_channels > 8) {
- for (i = 0; i < vc->audio_channels; i++)
- channel_ptrs[i] = (float *)frame->extended_data[i];
- } else {
- for (i = 0; i < vc->audio_channels; i++) {
- int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
- channel_ptrs[ch] = (float *)frame->extended_data[i];
- }
- }
-
- init_get_bits(gb, buf, buf_size*8);
-
- if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
- return len;
-
- if (!vc->first_frame) {
- vc->first_frame = 1;
- *got_frame_ptr = 0;
- av_frame_unref(frame);
- return buf_size;
- }
-
- av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
- get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
-
- frame->nb_samples = len;
- *got_frame_ptr = 1;
-
- return buf_size;
-}
-
-// Close decoder
-
-static av_cold int vorbis_decode_close(AVCodecContext *avctx)
-{
- vorbis_context *vc = avctx->priv_data;
-
- vorbis_free(vc);
-
- return 0;
-}
-
-static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
-{
- vorbis_context *vc = avctx->priv_data;
-
- if (vc->saved) {
- memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
- sizeof(*vc->saved));
- }
- vc->previous_window = 0;
-}
-
-AVCodec ff_vorbis_decoder = {
- .name = "vorbis",
- .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
- .type = AVMEDIA_TYPE_AUDIO,
- .id = AV_CODEC_ID_VORBIS,
- .priv_data_size = sizeof(vorbis_context),
- .init = vorbis_decode_init,
- .close = vorbis_decode_close,
- .decode = vorbis_decode_frame,
- .flush = vorbis_decode_flush,
- .capabilities = CODEC_CAP_DR1,
- .channel_layouts = ff_vorbis_channel_layouts,
- .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
- AV_SAMPLE_FMT_NONE },
-};
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 08:55:37 +0000