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91f64941d3
ffmpeg/libavcodec/vorbis_enc.c
Oded Shimon 91f64941d3 Original Commit: r55 | ods15 | 2006-09-24 13:54:43 +0300 (Sun, 24 Sep 2006) | 2 lines 
bug fixes for residue with no books in all passes

Originally committed as revision 6461 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-02 06:07:38 +00:00

846 lines
25 KiB
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/*
* copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file vorbis_enc.c
* Native Vorbis encoder.
* @author Oded Shimon <ods15@ods15.dyndns.org>
*/
#include "avcodec.h"
#define BITSTREAM_H // don't include this
typedef int VLC;
typedef int GetBitContext;
#include "vorbis.h"
#undef NDEBUG
#include <assert.h>
//#define ALT_BITSTREAM_WRITER
//#include "bitstream.h"
typedef struct {
int len;
uint32_t codeword;
} cb_entry_t;
typedef struct {
int nentries;
cb_entry_t * entries;
int ndimentions;
float min;
float delta;
int seq_p;
int lookup;
int * quantlist;
float * dimentions;
} codebook_t;
typedef struct {
int dim;
int subclass;
int masterbook;
int * books;
} floor_class_t;
typedef struct {
int partitions;
int * partition_to_class;
int nclasses;
floor_class_t * classes;
int multiplier;
int rangebits;
int values;
struct { int x; } * list;
} floor_t;
typedef struct {
int type;
int begin;
int end;
int partition_size;
int classifications;
int classbook;
int (*books)[8];
} residue_t;
typedef struct {
int submaps;
int * mux;
int * floor;
int * residue;
} mapping_t;
typedef struct {
int blockflag;
int mapping;
} vorbis_mode_t;
typedef struct {
int channels;
int sample_rate;
int blocksize[2]; // in (1<<n) format
MDCTContext mdct[2];
const float * win[2];
int have_saved;
float * saved;
float * samples;
float * floor; // also used for tmp values for mdct
float * coeffs; // also used for residue after floor
int ncodebooks;
codebook_t * codebooks;
int nfloors;
floor_t * floors;
int nresidues;
residue_t * residues;
int nmappings;
mapping_t * mappings;
int nmodes;
vorbis_mode_t * modes;
} venc_context_t;
typedef struct {
int total;
int total_pos;
int pos;
uint8_t * buf_ptr;
} PutBitContext;
#define ilog(i) av_log2(2*(i))
static inline void init_put_bits(PutBitContext * pb, uint8_t * buf, int buffer_len) {
pb->total = buffer_len * 8;
pb->total_pos = 0;
pb->pos = 0;
pb->buf_ptr = buf;
}
static void put_bits(PutBitContext * pb, int bits, uint64_t val) {
if ((pb->total_pos += bits) >= pb->total) return;
if (!bits) return;
if (pb->pos) {
if (pb->pos > bits) {
*pb->buf_ptr |= val << (8 - pb->pos);
pb->pos -= bits;
bits = 0;
} else {
*pb->buf_ptr++ |= (val << (8 - pb->pos)) & 0xFF;
val >>= pb->pos;
bits -= pb->pos;
pb->pos = 0;
}
}
for (; bits >= 8; bits -= 8) {
*pb->buf_ptr++ = val & 0xFF;
val >>= 8;
}
if (bits) {
*pb->buf_ptr = val;
pb->pos = 8 - bits;
}
}
static inline void flush_put_bits(PutBitContext * pb) {
}
static inline int put_bits_count(PutBitContext * pb) {
return pb->total_pos;
}
static int cb_lookup_vals(int lookup, int dimentions, int entries) {
if (lookup == 1) {
int tmp, i;
for (tmp = 0; ; tmp++) {
int n = 1;
for (i = 0; i < dimentions; i++) n *= tmp;
if (n > entries) break;
}
return tmp - 1;
} else if (lookup == 2) return dimentions * entries;
return 0;
}
static void ready_codebook(codebook_t * cb) {
int h[33] = { 1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
int i;
for (i = 0; i < cb->nentries; i++) {
cb_entry_t * e = &cb->entries[i];
int j = 0;
if (h[0]) h[0] = 0;
else {
for (j = e->len; j; j--)
if (h[j]) break;
assert(j);
}
e->codeword = h[j];
h[j] = 0;
for (j++; j <= e->len; j++) h[j] = e->codeword | (1 << (j - 1));
}
for (i = 0; i < 33; i++) assert(!h[i]);
if (!cb->lookup) cb->dimentions = NULL;
else {
int vals = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries);
cb->dimentions = av_malloc(sizeof(float) * cb->nentries * cb->ndimentions);
for (i = 0; i < cb->nentries; i++) {
float last = 0;
int j;
int div = 1;
for (j = 0; j < cb->ndimentions; j++) {
int off;
if (cb->lookup == 1) off = (i / div) % vals; // lookup type 1
else off = i * cb->ndimentions + j; // lookup type 2
cb->dimentions[i * cb->ndimentions + j] = last + cb->min + cb->quantlist[off] * cb->delta;
if (cb->seq_p) last = cb->dimentions[i * cb->ndimentions + j];
div *= vals;
}
}
}
}
static void create_vorbis_context(venc_context_t * venc, AVCodecContext * avccontext) {
codebook_t * cb;
floor_t * fc;
residue_t * rc;
mapping_t * mc;
int i, book;
venc->channels = avccontext->channels;
venc->sample_rate = avccontext->sample_rate;
venc->blocksize[0] = venc->blocksize[1] = 8;
venc->ncodebooks = 10;
venc->codebooks = av_malloc(sizeof(codebook_t) * venc->ncodebooks);
// codebook 0 - floor1 book, values 0..255
cb = &venc->codebooks[0];
cb->nentries = 256;
cb->entries = av_malloc(sizeof(cb_entry_t) * cb->nentries);
for (i = 0; i < cb->nentries; i++) cb->entries[i].len = 8;
cb->ndimentions = 0;
cb->min = 0.;
cb->delta = 0.;
cb->seq_p = 0;
cb->lookup = 0;
cb->quantlist = NULL;
ready_codebook(cb);
// codebook 1 - residue classbook, values 0..1, dimentions 4
cb = &venc->codebooks[1];
cb->nentries = 2;
cb->entries = av_malloc(sizeof(cb_entry_t) * cb->nentries);
for (i = 0; i < cb->nentries; i++) cb->entries[i].len = 1;
cb->ndimentions = 4;
cb->min = 0.;
cb->delta = 0.;
cb->seq_p = 0;
cb->lookup = 0;
cb->quantlist = NULL;
ready_codebook(cb);
// codebook 2..9 - vector, for the residue, values -32767..32767, dimentions 1
for (book = 0; book < 8; book++) {
cb = &venc->codebooks[2 + book];
cb->nentries = 5;
cb->entries = av_malloc(sizeof(cb_entry_t) * cb->nentries);
for (i = 0; i < cb->nentries; i++) cb->entries[i].len = i == 2 ? 1 : 3;
cb->ndimentions = 1;
cb->delta = 1 << ((7 - book) * 2);
cb->min = -cb->delta*2;
cb->seq_p = 0;
cb->lookup = 1;
cb->quantlist = av_malloc(sizeof(int) * cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries));
for (i = 0; i < cb->nentries; i++) cb->quantlist[i] = i;
ready_codebook(cb);
}
venc->nfloors = 1;
venc->floors = av_malloc(sizeof(floor_t) * venc->nfloors);
// just 1 floor
fc = &venc->floors[0];
fc->partitions = 1;
fc->partition_to_class = av_malloc(sizeof(int) * fc->partitions);
for (i = 0; i < fc->partitions; i++) fc->partition_to_class[i] = 0;
fc->nclasses = 1;
fc->classes = av_malloc(sizeof(floor_class_t) * fc->nclasses);
for (i = 0; i < fc->nclasses; i++) {
floor_class_t * c = &fc->classes[i];
int j, books;
c->dim = 1;
c->subclass = 0;
c->masterbook = 0;
books = (1 << c->subclass);
c->books = av_malloc(sizeof(int) * books);
for (j = 0; j < books; j++) c->books[j] = 0;
}
fc->multiplier = 1;
fc->rangebits = venc->blocksize[0] - 1;
fc->values = 2;
for (i = 0; i < fc->partitions; i++)
fc->values += fc->classes[fc->partition_to_class[i]].dim;
fc->list = av_malloc(sizeof(*fc->list) * fc->values);
fc->list[0].x = 0;
fc->list[1].x = 1 << fc->rangebits;
for (i = 2; i < fc->values; i++) fc->list[i].x = i * 5;
venc->nresidues = 1;
venc->residues = av_malloc(sizeof(residue_t) * venc->nresidues);
// single residue
rc = &venc->residues[0];
rc->type = 0;
rc->begin = 0;
rc->end = 1 << (venc->blocksize[0] - 1);
rc->partition_size = 64;
rc->classifications = 2;
rc->classbook = 1;
rc->books = av_malloc(sizeof(int[8]) * rc->classifications);
for (i = 0; i < rc->classifications; i++) {
int j;
for (j = 0; j < 8; j++) rc->books[i][j] = 2 + j;
rc->books[i][0] = rc->books[i][1] = rc->books[i][2] = rc->books[i][3] = -1;
}
venc->nmappings = 1;
venc->mappings = av_malloc(sizeof(mapping_t) * venc->nmappings);
// single mapping
mc = &venc->mappings[0];
mc->submaps = 1;
mc->mux = av_malloc(sizeof(int) * venc->channels);
for (i = 0; i < venc->channels; i++) mc->mux[i] = 0;
mc->floor = av_malloc(sizeof(int) * mc->submaps);
mc->residue = av_malloc(sizeof(int) * mc->submaps);
for (i = 0; i < mc->submaps; i++) {
mc->floor[i] = 0;
mc->residue[i] = 0;
}
venc->nmodes = 1;
venc->modes = av_malloc(sizeof(vorbis_mode_t) * venc->nmodes);
// single mode
venc->modes[0].blockflag = 0;
venc->modes[0].mapping = 0;
venc->have_saved = 0;
venc->saved = av_malloc(sizeof(float) * venc->channels * (1 << venc->blocksize[1]) / 2);
venc->samples = av_malloc(sizeof(float) * venc->channels * (1 << venc->blocksize[1]));
venc->floor = av_malloc(sizeof(float) * venc->channels * (1 << venc->blocksize[1]) / 2);
venc->coeffs = av_malloc(sizeof(float) * venc->channels * (1 << venc->blocksize[1]) / 2);
{
const float *vwin[8]={ vwin64, vwin128, vwin256, vwin512, vwin1024, vwin2048, vwin4096, vwin8192 };
venc->win[0] = vwin[venc->blocksize[0] - 6];
venc->win[1] = vwin[venc->blocksize[1] - 6];
}
ff_mdct_init(&venc->mdct[0], venc->blocksize[0], 0);
ff_mdct_init(&venc->mdct[1], venc->blocksize[1], 0);
}
static void put_float(PutBitContext * pb, float f) {
int exp, mant;
uint32_t res = 0;
mant = (int)ldexp(frexp(f, &exp), 20);
exp += 788 - 20;
if (mant < 0) { res |= (1 << 31); mant = -mant; }
res |= mant | (exp << 21);
put_bits(pb, 32, res);
}
static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
int i;
int ordered = 0;
put_bits(pb, 24, 0x564342); //magic
put_bits(pb, 16, cb->ndimentions);
put_bits(pb, 24, cb->nentries);
for (i = 1; i < cb->nentries; i++) if (cb->entries[i].len < cb->entries[i-1].len) break;
if (i == cb->nentries) ordered = 1;
put_bits(pb, 1, ordered);
if (ordered) {
int len = cb->entries[0].len;
put_bits(pb, 5, len - 1);
i = 0;
while (i < cb->nentries) {
int j;
for (j = 0; j+i < cb->nentries; j++) if (cb->entries[j+i].len != len) break;
put_bits(pb, ilog(cb->nentries - i), j);
i += j;
len++;
}
} else {
int sparse = 0;
for (i = 0; i < cb->nentries; i++) if (!cb->entries[i].len) break;
if (i != cb->nentries) sparse = 1;
put_bits(pb, 1, sparse);
for (i = 0; i < cb->nentries; i++) {
if (sparse) put_bits(pb, 1, !!cb->entries[i].len);
if (cb->entries[i].len) put_bits(pb, 5, cb->entries[i].len - 1);
}
}
put_bits(pb, 4, cb->lookup);
if (cb->lookup) {
int tmp = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries);
int bits = ilog(cb->quantlist[0]);
for (i = 1; i < tmp; i++) bits = FFMAX(bits, ilog(cb->quantlist[i]));
put_float(pb, cb->min);
put_float(pb, cb->delta);
put_bits(pb, 4, bits - 1);
put_bits(pb, 1, cb->seq_p);
for (i = 0; i < tmp; i++) put_bits(pb, bits, cb->quantlist[i]);
}
}
static void put_floor_header(PutBitContext * pb, floor_t * fc) {
int i;
put_bits(pb, 16, 1); // type, only floor1 is supported
put_bits(pb, 5, fc->partitions);
for (i = 0; i < fc->partitions; i++) put_bits(pb, 4, fc->partition_to_class[i]);
for (i = 0; i < fc->nclasses; i++) {
int j, books;
put_bits(pb, 3, fc->classes[i].dim - 1);
put_bits(pb, 2, fc->classes[i].subclass);
if (fc->classes[i].subclass) put_bits(pb, 8, fc->classes[i].masterbook);
books = (1 << fc->classes[i].subclass);
for (j = 0; j < books; j++) put_bits(pb, 8, fc->classes[i].books[j] + 1);
}
put_bits(pb, 2, fc->multiplier - 1);
put_bits(pb, 4, fc->rangebits);
for (i = 2; i < fc->values; i++) put_bits(pb, fc->rangebits, fc->list[i].x);
}
static void put_residue_header(PutBitContext * pb, residue_t * rc) {
int i;
put_bits(pb, 16, rc->type);
put_bits(pb, 24, rc->begin);
put_bits(pb, 24, rc->end);
put_bits(pb, 24, rc->partition_size - 1);
put_bits(pb, 6, rc->classifications - 1);
put_bits(pb, 8, rc->classbook);
for (i = 0; i < rc->classifications; i++) {
int j, tmp = 0;
for (j = 0; j < 8; j++) tmp |= (rc->books[i][j] != -1) << j;
put_bits(pb, 3, tmp & 7);
put_bits(pb, 1, tmp > 7);
if (tmp > 7) put_bits(pb, 5, tmp >> 3);
}
for (i = 0; i < rc->classifications; i++) {
int j;
for (j = 0; j < 8; j++)
if (rc->books[i][j] != -1)
put_bits(pb, 8, rc->books[i][j]);
}
}
static int put_main_header(venc_context_t * venc, uint8_t ** out) {
int i;
PutBitContext pb;
uint8_t buffer[50000] = {0}, * p = buffer;
int buffer_len = sizeof buffer;
int len, hlens[3];
// identification header
init_put_bits(&pb, p, buffer_len);
put_bits(&pb, 8, 1); //magic
for (i = 0; "vorbis"[i]; i++) put_bits(&pb, 8, "vorbis"[i]);
put_bits(&pb, 32, 0); // version
put_bits(&pb, 8, venc->channels);
put_bits(&pb, 32, venc->sample_rate);
put_bits(&pb, 32, 0); // bitrate
put_bits(&pb, 32, 0); // bitrate
put_bits(&pb, 32, 0); // bitrate
put_bits(&pb, 4, venc->blocksize[0]);
put_bits(&pb, 4, venc->blocksize[1]);
put_bits(&pb, 1, 1); // framing
flush_put_bits(&pb);
hlens[0] = (put_bits_count(&pb) + 7) / 8;
buffer_len -= hlens[0];
p += hlens[0];
// comment header
init_put_bits(&pb, p, buffer_len);
put_bits(&pb, 8, 3); //magic
for (i = 0; "vorbis"[i]; i++) put_bits(&pb, 8, "vorbis"[i]);
put_bits(&pb, 32, 0); // vendor length TODO
put_bits(&pb, 32, 0); // amount of comments
put_bits(&pb, 1, 1); // framing
flush_put_bits(&pb);
hlens[1] = (put_bits_count(&pb) + 7) / 8;
buffer_len -= hlens[1];
p += hlens[1];
// setup header
init_put_bits(&pb, p, buffer_len);
put_bits(&pb, 8, 5); //magic
for (i = 0; "vorbis"[i]; i++) put_bits(&pb, 8, "vorbis"[i]);
// codebooks
put_bits(&pb, 8, venc->ncodebooks - 1);
for (i = 0; i < venc->ncodebooks; i++) put_codebook_header(&pb, &venc->codebooks[i]);
// time domain, reserved, zero
put_bits(&pb, 6, 0);
put_bits(&pb, 16, 0);
// floors
put_bits(&pb, 6, venc->nfloors - 1);
for (i = 0; i < venc->nfloors; i++) put_floor_header(&pb, &venc->floors[i]);
// residues
put_bits(&pb, 6, venc->nresidues - 1);
for (i = 0; i < venc->nresidues; i++) put_residue_header(&pb, &venc->residues[i]);
// mappings
put_bits(&pb, 6, venc->nmappings - 1);
for (i = 0; i < venc->nmappings; i++) {
mapping_t * mc = &venc->mappings[i];
int j;
put_bits(&pb, 16, 0); // mapping type
put_bits(&pb, 1, mc->submaps > 1);
if (mc->submaps > 1) put_bits(&pb, 4, mc->submaps - 1);
put_bits(&pb, 1, 0); // channel coupling
put_bits(&pb, 2, 0); // reserved
if (mc->submaps > 1) for (j = 0; j < venc->channels; j++) put_bits(&pb, 4, mc->mux[j]);
for (j = 0; j < mc->submaps; j++) {
put_bits(&pb, 8, 0); // reserved time configuration
put_bits(&pb, 8, mc->floor[j]);
put_bits(&pb, 8, mc->residue[j]);
}
}
// modes
put_bits(&pb, 6, venc->nmodes - 1);
for (i = 0; i < venc->nmodes; i++) {
put_bits(&pb, 1, venc->modes[i].blockflag);
put_bits(&pb, 16, 0); // reserved window type
put_bits(&pb, 16, 0); // reserved transform type
put_bits(&pb, 8, venc->modes[i].mapping);
}
put_bits(&pb, 1, 1); // framing
flush_put_bits(&pb);
hlens[2] = (put_bits_count(&pb) + 7) / 8;
len = hlens[0] + hlens[1] + hlens[2];
p = *out = av_mallocz(64 + len + len/255);
*p++ = 2;
p += av_xiphlacing(p, hlens[0]);
p += av_xiphlacing(p, hlens[1]);
buffer_len = 0;
for (i = 0; i < 3; i++) {
memcpy(p, buffer + buffer_len, hlens[i]);
p += hlens[i];
buffer_len += hlens[i];
}
return p - *out;
}
static int vorbis_encode_init(AVCodecContext * avccontext)
{
venc_context_t * venc = avccontext->priv_data;
create_vorbis_context(venc, avccontext);
//if (avccontext->flags & CODEC_FLAG_QSCALE) avccontext->global_quality / (float)FF_QP2LAMBDA); else avccontext->bit_rate;
//if(avccontext->cutoff > 0) cfreq = avccontext->cutoff / 1000.0;
avccontext->extradata_size = put_main_header(venc, (uint8_t**)&avccontext->extradata);
avccontext->frame_size = 1 << (venc->blocksize[0] - 1);
avccontext->coded_frame = avcodec_alloc_frame();
avccontext->coded_frame->key_frame = 1;
return 0;
}
static int window(venc_context_t * venc, signed short * audio, int samples) {
int i, j, channel;
const float * win = venc->win[0];
int window_len = 1 << (venc->blocksize[0] - 1);
float n = (float)(1 << venc->blocksize[0]) / 4.;
// FIXME use dsp
if (!venc->have_saved && !samples) return 0;
if (venc->have_saved) {
for (channel = 0; channel < venc->channels; channel++) {
memcpy(venc->samples + channel*window_len*2, venc->saved + channel*window_len, sizeof(float)*window_len);
}
} else {
for (channel = 0; channel < venc->channels; channel++) {
memset(venc->samples + channel*window_len*2, 0, sizeof(float)*window_len);
}
}
if (samples) {
for (channel = 0; channel < venc->channels; channel++) {
float * offset = venc->samples + channel*window_len*2 + window_len;
j = channel;
for (i = 0; i < samples; i++, j += venc->channels)
offset[i] = audio[j] / 32768. * win[window_len - i] / n;
}
} else {
for (channel = 0; channel < venc->channels; channel++) {
memset(venc->samples + channel*window_len*2 + window_len, 0, sizeof(float)*window_len);
}
}
for (channel = 0; channel < venc->channels; channel++) {
ff_mdct_calc(&venc->mdct[0], venc->coeffs + channel*window_len, venc->samples + channel*window_len*2, venc->floor/*tmp*/);
}
if (samples) {
for (channel = 0; channel < venc->channels; channel++) {
float * offset = venc->saved + channel*window_len;
j = channel;
for (i = 0; i < samples; i++, j += venc->channels)
offset[i] = audio[j] / 32768. * win[i] / n;
}
venc->have_saved = 1;
} else {
venc->have_saved = 0;
}
return 1;
}
static float put_vector(codebook_t * book, PutBitContext * pb, float num) {
int i;
int entry = -1;
float distance = 0;
assert(book->dimentions);
assert(book->ndimentions == 1);
for (i = 0; i < book->nentries; i++) {
float d = (book->dimentions[i] - num)*(book->dimentions[i] - num);
if (entry == -1 || distance > d) {
entry = i;
distance = d;
}
}
put_bits(pb, book->entries[entry].len, book->entries[entry].codeword);
return book->dimentions[entry];
}
static void residue_encode(venc_context_t * venc, residue_t * rc, PutBitContext * pb, float * coeffs, int samples, int channels) {
int pass, i, j, p, k;
int psize = rc->partition_size;
int partitions = (rc->end - rc->begin) / psize;
int classes[channels][partitions];
int classwords = venc->codebooks[rc->classbook].ndimentions;
for (pass = 0; pass < 8; pass++) {
p = 0;
while (p < partitions) {
if (pass == 0) for (j = 0; j < channels; j++) {
codebook_t * book = &venc->codebooks[rc->classbook];
int entry = 0;
put_bits(pb, book->entries[entry].len, book->entries[entry].codeword);
for (i = classwords; i--; ) {
classes[j][p + i] = entry % rc->classifications;
entry /= rc->classifications;
}
}
for (i = 0; i < classwords && p < partitions; i++, p++) {
for (j = 0; j < channels; j++) {
int nbook = rc->books[classes[j][p]][pass];
codebook_t * book = &venc->codebooks[nbook];
float * buf = coeffs + samples*j + rc->begin + p*psize;
if (nbook == -1) continue;
assert(rc->type == 0);
assert(book->ndimentions == 1);
for (k = 0; k < psize; k++) {
buf[k] -= put_vector(book, pb, buf[k]);
}
}
}
}
}
}
static int vorbis_encode_frame(AVCodecContext * avccontext, unsigned char * packets, int buf_size, void *data)
{
venc_context_t * venc = avccontext->priv_data;
signed short * audio = data;
int samples = data ? avccontext->frame_size : 0;
vorbis_mode_t * mode;
mapping_t * mapping;
PutBitContext pb;
int i;
if (!window(venc, audio, samples)) return 0;
init_put_bits(&pb, packets, buf_size);
put_bits(&pb, 1, 0); // magic bit
put_bits(&pb, ilog(venc->nmodes - 1), 0); // 0 bits, the mode
mode = &venc->modes[0];
mapping = &venc->mappings[mode->mapping];
if (mode->blockflag) {
put_bits(&pb, 1, 0);
put_bits(&pb, 1, 0);
}
for (i = 0; i < venc->channels; i++) {
floor_t * fc = &venc->floors[mapping->floor[mapping->mux[i]]];
int range = 255 / fc->multiplier + 1;
int j;
put_bits(&pb, 1, 1); // non zero
put_bits(&pb, ilog(range - 1), 180); // magic value - 3.7180282E-05
put_bits(&pb, ilog(range - 1), 180); // both sides of X
for (j = 0; j < fc->partitions; j++) {
floor_class_t * c = &fc->classes[fc->partition_to_class[j]];
codebook_t * book = &venc->codebooks[c->books[0]];
int entry = 0;
int k;
for (k = 0; k < c->dim; k++) {
put_bits(&pb, book->entries[entry].len, book->entries[entry].codeword);
}
}
for (j = 0; j < samples; j++) {
venc->floor[i * samples + j] = floor1_inverse_db_table[180];
}
}
for (i = 0; i < venc->channels; i++) {
int j;
for (j = 0; j < samples; j++) {
venc->coeffs[i * samples + j] /= venc->floor[i * samples + j];
}
}
residue_encode(venc, &venc->residues[mapping->residue[mapping->mux[0]]], &pb, venc->coeffs, samples, venc->channels);
return (put_bits_count(&pb) + 7) / 8;
}
static int vorbis_encode_close(AVCodecContext * avccontext)
{
venc_context_t * venc = avccontext->priv_data;
int i;
if (venc->codebooks) for (i = 0; i < venc->ncodebooks; i++) {
av_freep(&venc->codebooks[i].entries);
av_freep(&venc->codebooks[i].quantlist);
av_freep(&venc->codebooks[i].dimentions);
}
av_freep(&venc->codebooks);
if (venc->floors) for (i = 0; i < venc->nfloors; i++) {
int j;
av_freep(&venc->floors[i].classes);
if (venc->floors[i].classes)
for (j = 0; j < venc->floors[i].nclasses; j++)
av_freep(&venc->floors[i].classes[j].books);
av_freep(&venc->floors[i].partition_to_class);
av_freep(&venc->floors[i].list);
}
av_freep(&venc->floors);
if (venc->residues) for (i = 0; i < venc->nresidues; i++) {
av_freep(&venc->residues[i].books);
}
av_freep(&venc->residues);
if (venc->mappings) for (i = 0; i < venc->nmappings; i++) {
av_freep(&venc->mappings[i].mux);
av_freep(&venc->mappings[i].floor);
av_freep(&venc->mappings[i].residue);
}
av_freep(&venc->mappings);
av_freep(&venc->modes);
av_freep(&venc->saved);
av_freep(&venc->samples);
av_freep(&venc->floor);
av_freep(&venc->coeffs);
ff_mdct_end(&venc->mdct[0]);
ff_mdct_end(&venc->mdct[1]);
av_freep(&avccontext->coded_frame);
av_freep(&avccontext->extradata);
return 0 ;
}
AVCodec oggvorbis_encoder = {
"vorbis",
CODEC_TYPE_AUDIO,
CODEC_ID_VORBIS,
sizeof(venc_context_t),
vorbis_encode_init,
vorbis_encode_frame,
vorbis_encode_close,
.capabilities= CODEC_CAP_DELAY,
};
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