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/*
* copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
* |
b78e7197 |
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
504d1952 |
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
b78e7197 |
* version 2.1 of the License, or (at your option) any later version. |
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* |
b78e7197 |
* FFmpeg is distributed in the hope that it will be useful, |
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* 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 |
b78e7197 |
* License along with FFmpeg; if not, write to the Free Software |
e5a389a1 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/
/** |
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* @file |
504d1952 |
* Native Vorbis encoder.
* @author Oded Shimon <ods15@ods15.dyndns.org>
*/
|
f8a6a56a |
#include <float.h> |
504d1952 |
#include "avcodec.h" |
ddf217ba |
#include "dsputil.h" |
1429224b |
#include "fft.h" |
6b03d096 |
#include "vorbis.h" |
bec5fc5f |
#include "vorbis_enc_data.h" |
6b03d096 |
|
757d91a6 |
#define BITSTREAM_WRITER_LE |
b2755007 |
#include "put_bits.h" |
757d91a6 |
|
504d1952 |
#undef NDEBUG
#include <assert.h>
typedef struct { |
0688b89c |
int nentries; |
a7adcf29 |
uint8_t *lens;
uint32_t *codewords; |
0688b89c |
int ndimentions;
float min;
float delta;
int seq_p;
int lookup; |
a7adcf29 |
int *quantlist;
float *dimentions;
float *pow2; |
05dee1b7 |
} vorbis_enc_codebook; |
0688b89c |
typedef struct { |
d2d5c89d |
int dim;
int subclass;
int masterbook; |
a7adcf29 |
int *books; |
05dee1b7 |
} vorbis_enc_floor_class; |
d2d5c89d |
typedef struct {
int partitions; |
a7adcf29 |
int *partition_to_class; |
d2d5c89d |
int nclasses; |
a7adcf29 |
vorbis_enc_floor_class *classes; |
d2d5c89d |
int multiplier;
int rangebits;
int values; |
a7adcf29 |
vorbis_floor1_entry *list; |
05dee1b7 |
} vorbis_enc_floor; |
d52480b4 |
typedef struct { |
6f133df1 |
int type;
int begin;
int end;
int partition_size;
int classifications;
int classbook; |
ccc0fbf3 |
int8_t (*books)[8]; |
7f44dfe2 |
float (*maxes)[2]; |
05dee1b7 |
} vorbis_enc_residue; |
d52480b4 |
typedef struct { |
beaec74a |
int submaps; |
a7adcf29 |
int *mux;
int *floor;
int *residue; |
9d74ff0e |
int coupling_steps; |
a7adcf29 |
int *magnitude;
int *angle; |
05dee1b7 |
} vorbis_enc_mapping; |
d52480b4 |
typedef struct { |
8016c73f |
int blockflag;
int mapping; |
05dee1b7 |
} vorbis_enc_mode; |
8016c73f |
typedef struct { |
31121241 |
int channels;
int sample_rate; |
00757448 |
int log2_blocksize[2]; |
01b22147 |
FFTContext mdct[2]; |
a7adcf29 |
const float *win[2]; |
f71b6d70 |
int have_saved; |
a7adcf29 |
float *saved;
float *samples;
float *floor; // also used for tmp values for mdct
float *coeffs; // also used for residue after floor |
4000774d |
float quality; |
31121241 |
|
0688b89c |
int ncodebooks; |
a7adcf29 |
vorbis_enc_codebook *codebooks; |
d52480b4 |
int nfloors; |
a7adcf29 |
vorbis_enc_floor *floors; |
d52480b4 |
int nresidues; |
a7adcf29 |
vorbis_enc_residue *residues; |
d52480b4 |
int nmappings; |
a7adcf29 |
vorbis_enc_mapping *mappings; |
8016c73f |
int nmodes; |
a7adcf29 |
vorbis_enc_mode *modes; |
91ba93e6 |
int64_t sample_count; |
05dee1b7 |
} vorbis_enc_context; |
504d1952 |
|
d66a546f |
#define MAX_CHANNELS 2
#define MAX_CODEBOOK_DIM 8
#define MAX_FLOOR_CLASS_DIM 4
#define NUM_FLOOR_PARTITIONS 8
#define MAX_FLOOR_VALUES (MAX_FLOOR_CLASS_DIM*NUM_FLOOR_PARTITIONS+2)
#define RESIDUE_SIZE 1600
#define RESIDUE_PART_SIZE 32
#define NUM_RESIDUE_PARTITIONS (RESIDUE_SIZE/RESIDUE_PART_SIZE)
|
a7adcf29 |
static inline void put_codeword(PutBitContext *pb, vorbis_enc_codebook *cb, |
5e56b30e |
int entry)
{ |
f11329e4 |
assert(entry >= 0);
assert(entry < cb->nentries);
assert(cb->lens[entry]);
put_bits(pb, cb->lens[entry], cb->codewords[entry]);
}
|
5e56b30e |
static int cb_lookup_vals(int lookup, int dimentions, int entries)
{
if (lookup == 1)
return ff_vorbis_nth_root(entries, dimentions);
else if (lookup == 2) |
a7adcf29 |
return dimentions *entries; |
73acc51c |
return 0;
}
|
a7adcf29 |
static void ready_codebook(vorbis_enc_codebook *cb) |
5e56b30e |
{ |
73acc51c |
int i;
|
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ff_vorbis_len2vlc(cb->lens, cb->codewords, cb->nentries); |
73acc51c |
|
a7adcf29 |
if (!cb->lookup) { |
35af7a9b |
cb->pow2 = cb->dimentions = NULL; |
a7adcf29 |
} else { |
73acc51c |
int vals = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries);
cb->dimentions = av_malloc(sizeof(float) * cb->nentries * cb->ndimentions); |
f8a6a56a |
cb->pow2 = av_mallocz(sizeof(float) * cb->nentries); |
73acc51c |
for (i = 0; i < cb->nentries; i++) {
float last = 0;
int j;
int div = 1;
for (j = 0; j < cb->ndimentions; j++) {
int off; |
35af7a9b |
if (cb->lookup == 1)
off = (i / div) % vals; // lookup type 1
else
off = i * cb->ndimentions + j; // lookup type 2 |
73acc51c |
cb->dimentions[i * cb->ndimentions + j] = last + cb->min + cb->quantlist[off] * cb->delta; |
35af7a9b |
if (cb->seq_p)
last = cb->dimentions[i * cb->ndimentions + j]; |
a7adcf29 |
cb->pow2[i] += cb->dimentions[i * cb->ndimentions + j] * cb->dimentions[i * cb->ndimentions + j]; |
73acc51c |
div *= vals;
} |
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cb->pow2[i] /= 2.; |
73acc51c |
}
}
}
|
a7adcf29 |
static void ready_residue(vorbis_enc_residue *rc, vorbis_enc_context *venc) |
5e56b30e |
{ |
7f44dfe2 |
int i;
assert(rc->type == 2);
rc->maxes = av_mallocz(sizeof(float[2]) * rc->classifications);
for (i = 0; i < rc->classifications; i++) {
int j; |
05dee1b7 |
vorbis_enc_codebook * cb; |
35af7a9b |
for (j = 0; j < 8; j++) |
5e56b30e |
if (rc->books[i][j] != -1)
break; |
a7adcf29 |
if (j == 8) // zero
continue; |
7f44dfe2 |
cb = &venc->codebooks[rc->books[i][j]];
assert(cb->ndimentions >= 2);
assert(cb->lookup);
for (j = 0; j < cb->nentries; j++) {
float a; |
5e56b30e |
if (!cb->lens[j])
continue; |
7f44dfe2 |
a = fabs(cb->dimentions[j * cb->ndimentions]); |
35af7a9b |
if (a > rc->maxes[i][0])
rc->maxes[i][0] = a; |
7f44dfe2 |
a = fabs(cb->dimentions[j * cb->ndimentions + 1]); |
35af7a9b |
if (a > rc->maxes[i][1])
rc->maxes[i][1] = a; |
7f44dfe2 |
}
}
// small bias
for (i = 0; i < rc->classifications; i++) {
rc->maxes[i][0] += 0.8;
rc->maxes[i][1] += 0.8;
}
}
|
a7adcf29 |
static void create_vorbis_context(vorbis_enc_context *venc,
AVCodecContext *avccontext) |
5e56b30e |
{ |
a7adcf29 |
vorbis_enc_floor *fc;
vorbis_enc_residue *rc;
vorbis_enc_mapping *mc; |
e08d964d |
int i, book; |
73acc51c |
|
a7adcf29 |
venc->channels = avccontext->channels; |
39d05677 |
venc->sample_rate = avccontext->sample_rate; |
00757448 |
venc->log2_blocksize[0] = venc->log2_blocksize[1] = 11; |
39d05677 |
|
37d3e066 |
venc->ncodebooks = FF_ARRAY_ELEMS(cvectors); |
a7adcf29 |
venc->codebooks = av_malloc(sizeof(vorbis_enc_codebook) * venc->ncodebooks); |
39d05677 |
|
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// codebook 0..14 - floor1 book, values 0..255 |
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// codebook 15 residue masterbook
// codebook 16..29 residue
for (book = 0; book < venc->ncodebooks; book++) { |
a7adcf29 |
vorbis_enc_codebook *cb = &venc->codebooks[book]; |
cbf306f3 |
int vals;
cb->ndimentions = cvectors[book].dim; |
a7adcf29 |
cb->nentries = cvectors[book].real_len;
cb->min = cvectors[book].min;
cb->delta = cvectors[book].delta;
cb->lookup = cvectors[book].lookup;
cb->seq_p = 0; |
f11329e4 |
|
a7adcf29 |
cb->lens = av_malloc(sizeof(uint8_t) * cb->nentries); |
f11329e4 |
cb->codewords = av_malloc(sizeof(uint32_t) * cb->nentries);
memcpy(cb->lens, cvectors[book].clens, cvectors[book].len);
memset(cb->lens + cvectors[book].len, 0, cb->nentries - cvectors[book].len);
|
cbf306f3 |
if (cb->lookup) {
vals = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries);
cb->quantlist = av_malloc(sizeof(int) * vals); |
35af7a9b |
for (i = 0; i < vals; i++)
cb->quantlist[i] = cvectors[book].quant[i]; |
cbf306f3 |
} else {
cb->quantlist = NULL;
} |
e08d964d |
ready_codebook(cb);
} |
73acc51c |
|
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venc->nfloors = 1; |
a7adcf29 |
venc->floors = av_malloc(sizeof(vorbis_enc_floor) * venc->nfloors); |
b9db113d |
|
491d4dfd |
// just 1 floor
fc = &venc->floors[0]; |
d66a546f |
fc->partitions = NUM_FLOOR_PARTITIONS; |
b9db113d |
fc->partition_to_class = av_malloc(sizeof(int) * fc->partitions); |
a7adcf29 |
fc->nclasses = 0; |
9127d7c3 |
for (i = 0; i < fc->partitions; i++) { |
a7adcf29 |
static const int a[] = {0, 1, 2, 2, 3, 3, 4, 4}; |
9127d7c3 |
fc->partition_to_class[i] = a[i];
fc->nclasses = FFMAX(fc->nclasses, fc->partition_to_class[i]);
}
fc->nclasses++; |
05dee1b7 |
fc->classes = av_malloc(sizeof(vorbis_enc_floor_class) * fc->nclasses); |
b9db113d |
for (i = 0; i < fc->nclasses; i++) { |
05dee1b7 |
vorbis_enc_floor_class * c = &fc->classes[i]; |
b9db113d |
int j, books; |
a7adcf29 |
c->dim = floor_classes[i].dim;
c->subclass = floor_classes[i].subclass; |
63194144 |
c->masterbook = floor_classes[i].masterbook; |
a7adcf29 |
books = (1 << c->subclass);
c->books = av_malloc(sizeof(int) * books); |
35af7a9b |
for (j = 0; j < books; j++)
c->books[j] = floor_classes[i].nbooks[j]; |
b9db113d |
} |
9127d7c3 |
fc->multiplier = 2; |
a7adcf29 |
fc->rangebits = venc->log2_blocksize[0] - 1; |
b9db113d |
fc->values = 2;
for (i = 0; i < fc->partitions; i++)
fc->values += fc->classes[fc->partition_to_class[i]].dim;
|
05dee1b7 |
fc->list = av_malloc(sizeof(vorbis_floor1_entry) * fc->values); |
b9db113d |
fc->list[0].x = 0;
fc->list[1].x = 1 << fc->rangebits; |
62ca51b3 |
for (i = 2; i < fc->values; i++) { |
5f3de4b8 |
static const int a[] = {
93, 23,372, 6, 46,186,750, 14, 33, 65,
130,260,556, 3, 10, 18, 28, 39, 55, 79,
111,158,220,312,464,650,850
}; |
cbb834af |
fc->list[i].x = a[i - 2]; |
62ca51b3 |
} |
7e460457 |
ff_vorbis_ready_floor1_list(fc->list, fc->values); |
e185750a |
venc->nresidues = 1; |
a7adcf29 |
venc->residues = av_malloc(sizeof(vorbis_enc_residue) * venc->nresidues); |
e185750a |
|
0df46aa2 |
// single residue
rc = &venc->residues[0]; |
a7adcf29 |
rc->type = 2;
rc->begin = 0;
rc->end = 1600;
rc->partition_size = 32; |
840d1573 |
rc->classifications = 10; |
a7adcf29 |
rc->classbook = 15;
rc->books = av_malloc(sizeof(*rc->books) * rc->classifications); |
ccc0fbf3 |
{
static const int8_t a[10][8] = { |
840d1573 |
{ -1, -1, -1, -1, -1, -1, -1, -1, },
{ -1, -1, 16, -1, -1, -1, -1, -1, },
{ -1, -1, 17, -1, -1, -1, -1, -1, },
{ -1, -1, 18, -1, -1, -1, -1, -1, },
{ -1, -1, 19, -1, -1, -1, -1, -1, },
{ -1, -1, 20, -1, -1, -1, -1, -1, },
{ -1, -1, 21, -1, -1, -1, -1, -1, },
{ 22, 23, -1, -1, -1, -1, -1, -1, },
{ 24, 25, -1, -1, -1, -1, -1, -1, },
{ 26, 27, 28, -1, -1, -1, -1, -1, },
}; |
ccc0fbf3 |
memcpy(rc->books, a, sizeof a); |
174476cd |
} |
7f44dfe2 |
ready_residue(rc, venc); |
0df46aa2 |
|
e185750a |
venc->nmappings = 1; |
a7adcf29 |
venc->mappings = av_malloc(sizeof(vorbis_enc_mapping) * venc->nmappings); |
e185750a |
|
8e59b82d |
// single mapping
mc = &venc->mappings[0];
mc->submaps = 1; |
a7adcf29 |
mc->mux = av_malloc(sizeof(int) * venc->channels); |
35af7a9b |
for (i = 0; i < venc->channels; i++)
mc->mux[i] = 0; |
a7adcf29 |
mc->floor = av_malloc(sizeof(int) * mc->submaps); |
8e59b82d |
mc->residue = av_malloc(sizeof(int) * mc->submaps);
for (i = 0; i < mc->submaps; i++) { |
a7adcf29 |
mc->floor[i] = 0; |
8e59b82d |
mc->residue[i] = 0;
} |
9d74ff0e |
mc->coupling_steps = venc->channels == 2 ? 1 : 0; |
a7adcf29 |
mc->magnitude = av_malloc(sizeof(int) * mc->coupling_steps);
mc->angle = av_malloc(sizeof(int) * mc->coupling_steps); |
9d74ff0e |
if (mc->coupling_steps) {
mc->magnitude[0] = 0; |
a7adcf29 |
mc->angle[0] = 1; |
9d74ff0e |
} |
8e59b82d |
|
e185750a |
venc->nmodes = 1; |
a7adcf29 |
venc->modes = av_malloc(sizeof(vorbis_enc_mode) * venc->nmodes); |
fb5eba8c |
// single mode
venc->modes[0].blockflag = 0; |
a7adcf29 |
venc->modes[0].mapping = 0; |
6b03d096 |
|
f71b6d70 |
venc->have_saved = 0; |
a7adcf29 |
venc->saved = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2);
venc->samples = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]));
venc->floor = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2);
venc->coeffs = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2); |
6b03d096 |
|
00757448 |
venc->win[0] = ff_vorbis_vwin[venc->log2_blocksize[0] - 6];
venc->win[1] = ff_vorbis_vwin[venc->log2_blocksize[1] - 6]; |
6b03d096 |
|
7d485f16 |
ff_mdct_init(&venc->mdct[0], venc->log2_blocksize[0], 0, 1.0);
ff_mdct_init(&venc->mdct[1], venc->log2_blocksize[1], 0, 1.0); |
73acc51c |
}
|
a7adcf29 |
static void put_float(PutBitContext *pb, float f) |
5e56b30e |
{ |
1f7e7464 |
int exp, mant;
uint32_t res = 0;
mant = (int)ldexp(frexp(f, &exp), 20);
exp += 788 - 20; |
5e56b30e |
if (mant < 0) { |
187a5379 |
res |= (1U << 31); |
5e56b30e |
mant = -mant;
} |
1f7e7464 |
res |= mant | (exp << 21); |
43d7c611 |
put_bits32(pb, res); |
31121241 |
}
|
a7adcf29 |
static void put_codebook_header(PutBitContext *pb, vorbis_enc_codebook *cb) |
5e56b30e |
{ |
0688b89c |
int i;
int ordered = 0;
put_bits(pb, 24, 0x564342); //magic
put_bits(pb, 16, cb->ndimentions);
put_bits(pb, 24, cb->nentries);
|
35af7a9b |
for (i = 1; i < cb->nentries; i++) |
5e56b30e |
if (cb->lens[i] < cb->lens[i-1])
break; |
35af7a9b |
if (i == cb->nentries)
ordered = 1; |
0688b89c |
put_bits(pb, 1, ordered);
if (ordered) { |
f11329e4 |
int len = cb->lens[0]; |
0e6fd0f1 |
put_bits(pb, 5, len - 1); |
0688b89c |
i = 0;
while (i < cb->nentries) { |
31121241 |
int j; |
35af7a9b |
for (j = 0; j+i < cb->nentries; j++) |
5e56b30e |
if (cb->lens[j+i] != len)
break; |
128c0dfe |
put_bits(pb, ilog(cb->nentries - i), j); |
0688b89c |
i += j;
len++;
}
} else {
int sparse = 0; |
35af7a9b |
for (i = 0; i < cb->nentries; i++) |
5e56b30e |
if (!cb->lens[i])
break; |
35af7a9b |
if (i != cb->nentries)
sparse = 1; |
0688b89c |
put_bits(pb, 1, sparse);
for (i = 0; i < cb->nentries; i++) { |
5e56b30e |
if (sparse)
put_bits(pb, 1, !!cb->lens[i]);
if (cb->lens[i])
put_bits(pb, 5, cb->lens[i] - 1); |
0688b89c |
}
}
put_bits(pb, 4, cb->lookup);
if (cb->lookup) { |
a7adcf29 |
int tmp = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries); |
73acc51c |
int bits = ilog(cb->quantlist[0]); |
0688b89c |
|
35af7a9b |
for (i = 1; i < tmp; i++)
bits = FFMAX(bits, ilog(cb->quantlist[i])); |
0688b89c |
|
31121241 |
put_float(pb, cb->min);
put_float(pb, cb->delta); |
0688b89c |
|
31121241 |
put_bits(pb, 4, bits - 1);
put_bits(pb, 1, cb->seq_p); |
0688b89c |
|
35af7a9b |
for (i = 0; i < tmp; i++)
put_bits(pb, bits, cb->quantlist[i]); |
0688b89c |
}
}
|
a7adcf29 |
static void put_floor_header(PutBitContext *pb, vorbis_enc_floor *fc) |
5e56b30e |
{ |
d2d5c89d |
int i;
put_bits(pb, 16, 1); // type, only floor1 is supported
put_bits(pb, 5, fc->partitions);
|
35af7a9b |
for (i = 0; i < fc->partitions; i++)
put_bits(pb, 4, fc->partition_to_class[i]); |
d2d5c89d |
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);
|
35af7a9b |
if (fc->classes[i].subclass)
put_bits(pb, 8, fc->classes[i].masterbook); |
d2d5c89d |
books = (1 << fc->classes[i].subclass);
|
35af7a9b |
for (j = 0; j < books; j++)
put_bits(pb, 8, fc->classes[i].books[j] + 1); |
d2d5c89d |
}
put_bits(pb, 2, fc->multiplier - 1);
put_bits(pb, 4, fc->rangebits);
|
35af7a9b |
for (i = 2; i < fc->values; i++)
put_bits(pb, fc->rangebits, fc->list[i].x); |
d52480b4 |
}
|
a7adcf29 |
static void put_residue_header(PutBitContext *pb, vorbis_enc_residue *rc) |
5e56b30e |
{ |
6f133df1 |
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); |
e3bbb591 |
put_bits(pb, 6, rc->classifications - 1); |
6f133df1 |
put_bits(pb, 8, rc->classbook);
for (i = 0; i < rc->classifications; i++) {
int j, tmp = 0; |
35af7a9b |
for (j = 0; j < 8; j++)
tmp |= (rc->books[i][j] != -1) << j; |
6f133df1 |
put_bits(pb, 3, tmp & 7);
put_bits(pb, 1, tmp > 7);
|
35af7a9b |
if (tmp > 7)
put_bits(pb, 5, tmp >> 3); |
6f133df1 |
}
for (i = 0; i < rc->classifications; i++) {
int j;
for (j = 0; j < 8; j++) |
91f64941 |
if (rc->books[i][j] != -1) |
6f133df1 |
put_bits(pb, 8, rc->books[i][j]);
} |
d52480b4 |
}
|
a7adcf29 |
static int put_main_header(vorbis_enc_context *venc, uint8_t **out) |
5e56b30e |
{ |
0688b89c |
int i; |
31121241 |
PutBitContext pb; |
a7adcf29 |
uint8_t buffer[50000] = {0}, *p = buffer; |
31121241 |
int buffer_len = sizeof buffer;
int len, hlens[3];
// identification header
init_put_bits(&pb, p, buffer_len);
put_bits(&pb, 8, 1); //magic |
38b5b47b |
for (i = 0; "vorbis"[i]; i++)
put_bits(&pb, 8, "vorbis"[i]); |
43d7c611 |
put_bits32(&pb, 0); // version |
a7adcf29 |
put_bits(&pb, 8, venc->channels); |
43d7c611 |
put_bits32(&pb, venc->sample_rate);
put_bits32(&pb, 0); // bitrate
put_bits32(&pb, 0); // bitrate
put_bits32(&pb, 0); // bitrate |
a7adcf29 |
put_bits(&pb, 4, venc->log2_blocksize[0]);
put_bits(&pb, 4, venc->log2_blocksize[1]);
put_bits(&pb, 1, 1); // framing |
31121241 |
flush_put_bits(&pb); |
5200b901 |
hlens[0] = put_bits_count(&pb) >> 3; |
31121241 |
buffer_len -= hlens[0];
p += hlens[0];
// comment header
init_put_bits(&pb, p, buffer_len);
put_bits(&pb, 8, 3); //magic |
38b5b47b |
for (i = 0; "vorbis"[i]; i++)
put_bits(&pb, 8, "vorbis"[i]); |
43d7c611 |
put_bits32(&pb, 0); // vendor length TODO
put_bits32(&pb, 0); // amount of comments |
a7adcf29 |
put_bits(&pb, 1, 1); // framing |
31121241 |
flush_put_bits(&pb); |
5200b901 |
hlens[1] = put_bits_count(&pb) >> 3; |
31121241 |
buffer_len -= hlens[1];
p += hlens[1];
// setup header
init_put_bits(&pb, p, buffer_len);
put_bits(&pb, 8, 5); //magic |
38b5b47b |
for (i = 0; "vorbis"[i]; i++)
put_bits(&pb, 8, "vorbis"[i]); |
31121241 |
// codebooks
put_bits(&pb, 8, venc->ncodebooks - 1); |
35af7a9b |
for (i = 0; i < venc->ncodebooks; i++)
put_codebook_header(&pb, &venc->codebooks[i]); |
31121241 |
|
d52480b4 |
// time domain, reserved, zero |
a7adcf29 |
put_bits(&pb, 6, 0); |
d52480b4 |
put_bits(&pb, 16, 0);
// floors
put_bits(&pb, 6, venc->nfloors - 1); |
35af7a9b |
for (i = 0; i < venc->nfloors; i++)
put_floor_header(&pb, &venc->floors[i]); |
d52480b4 |
// residues
put_bits(&pb, 6, venc->nresidues - 1); |
35af7a9b |
for (i = 0; i < venc->nresidues; i++)
put_residue_header(&pb, &venc->residues[i]); |
d52480b4 |
// mappings
put_bits(&pb, 6, venc->nmappings - 1);
for (i = 0; i < venc->nmappings; i++) { |
a7adcf29 |
vorbis_enc_mapping *mc = &venc->mappings[i]; |
beaec74a |
int j;
put_bits(&pb, 16, 0); // mapping type
put_bits(&pb, 1, mc->submaps > 1); |
35af7a9b |
if (mc->submaps > 1)
put_bits(&pb, 4, mc->submaps - 1); |
beaec74a |
|
9d74ff0e |
put_bits(&pb, 1, !!mc->coupling_steps);
if (mc->coupling_steps) {
put_bits(&pb, 8, mc->coupling_steps - 1);
for (j = 0; j < mc->coupling_steps; j++) {
put_bits(&pb, ilog(venc->channels - 1), mc->magnitude[j]);
put_bits(&pb, ilog(venc->channels - 1), mc->angle[j]);
}
} |
beaec74a |
put_bits(&pb, 2, 0); // reserved
|
35af7a9b |
if (mc->submaps > 1)
for (j = 0; j < venc->channels; j++)
put_bits(&pb, 4, mc->mux[j]); |
beaec74a |
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]);
} |
d52480b4 |
} |
31121241 |
|
8016c73f |
// 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);
}
|
be01eec6 |
put_bits(&pb, 1, 1); // framing
|
31121241 |
flush_put_bits(&pb); |
5200b901 |
hlens[2] = put_bits_count(&pb) >> 3; |
31121241 |
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];
} |
0688b89c |
|
31121241 |
return p - *out; |
0688b89c |
}
|
a7adcf29 |
static float get_floor_average(vorbis_enc_floor * fc, float *coeffs, int i) |
5e56b30e |
{ |
b002eec9 |
int begin = fc->list[fc->list[FFMAX(i-1, 0)].sort].x;
int end = fc->list[fc->list[FFMIN(i+1, fc->values - 1)].sort].x;
int j;
float average = 0;
|
35af7a9b |
for (j = begin; j < end; j++)
average += fabs(coeffs[j]); |
b002eec9 |
return average / (end - begin);
}
|
a7adcf29 |
static void floor_fit(vorbis_enc_context *venc, vorbis_enc_floor *fc, |
0a6b1a9f |
float *coeffs, uint16_t *posts, int samples) |
5e56b30e |
{ |
cf0f2642 |
int range = 255 / fc->multiplier + 1;
int i; |
b002eec9 |
float tot_average = 0.; |
d66a546f |
float averages[MAX_FLOOR_VALUES]; |
a7adcf29 |
for (i = 0; i < fc->values; i++) { |
35af7a9b |
averages[i] = get_floor_average(fc, coeffs, i);
tot_average += averages[i];
} |
b002eec9 |
tot_average /= fc->values; |
4000774d |
tot_average /= venc->quality; |
b002eec9 |
|
cf0f2642 |
for (i = 0; i < fc->values; i++) { |
a7adcf29 |
int position = fc->list[fc->list[i].sort].x; |
cc767a89 |
float average = averages[i]; |
cf0f2642 |
int j;
|
83b70761 |
average = sqrt(tot_average * average) * pow(1.25f, position*0.005f); // MAGIC! |
35af7a9b |
for (j = 0; j < range - 1; j++) |
5e56b30e |
if (ff_vorbis_floor1_inverse_db_table[j * fc->multiplier] > average)
break; |
cf0f2642 |
posts[fc->list[i].sort] = j;
}
}
|
5e56b30e |
static int render_point(int x0, int y0, int x1, int y1, int x)
{ |
09a0d8b3 |
return y0 + (x - x0) * (y1 - y0) / (x1 - x0);
}
|
a7adcf29 |
static void floor_encode(vorbis_enc_context *venc, vorbis_enc_floor *fc, |
0a6b1a9f |
PutBitContext *pb, uint16_t *posts, |
a7adcf29 |
float *floor, int samples) |
5e56b30e |
{ |
62ca51b3 |
int range = 255 / fc->multiplier + 1; |
d66a546f |
int coded[MAX_FLOOR_VALUES]; // first 2 values are unused |
09a0d8b3 |
int i, counter;
|
62ca51b3 |
put_bits(pb, 1, 1); // non zero |
09a0d8b3 |
put_bits(pb, ilog(range - 1), posts[0]);
put_bits(pb, ilog(range - 1), posts[1]); |
40b6c721 |
coded[0] = coded[1] = 1; |
09a0d8b3 |
for (i = 2; i < fc->values; i++) {
int predicted = render_point(fc->list[fc->list[i].low].x,
posts[fc->list[i].low],
fc->list[fc->list[i].high].x,
posts[fc->list[i].high],
fc->list[i].x); |
4fa29073 |
int highroom = range - predicted; |
09a0d8b3 |
int lowroom = predicted;
int room = FFMIN(highroom, lowroom);
if (predicted == posts[i]) {
coded[i] = 0; // must be used later as flag!
continue; |
63fc901e |
} else { |
5e56b30e |
if (!coded[fc->list[i].low ])
coded[fc->list[i].low ] = -1;
if (!coded[fc->list[i].high])
coded[fc->list[i].high] = -1; |
09a0d8b3 |
}
if (posts[i] > predicted) { |
35af7a9b |
if (posts[i] - predicted > room)
coded[i] = posts[i] - predicted + lowroom;
else
coded[i] = (posts[i] - predicted) << 1; |
09a0d8b3 |
} else { |
35af7a9b |
if (predicted - posts[i] > room)
coded[i] = predicted - posts[i] + highroom - 1;
else
coded[i] = ((predicted - posts[i]) << 1) - 1; |
09a0d8b3 |
}
}
counter = 2;
for (i = 0; i < fc->partitions; i++) { |
05dee1b7 |
vorbis_enc_floor_class * c = &fc->classes[fc->partition_to_class[i]]; |
a277ad84 |
int k, cval = 0, csub = 1<<c->subclass;
if (c->subclass) { |
05dee1b7 |
vorbis_enc_codebook * book = &venc->codebooks[c->masterbook]; |
a277ad84 |
int cshift = 0;
for (k = 0; k < c->dim; k++) {
int l;
for (l = 0; l < csub; l++) {
int maxval = 1; |
35af7a9b |
if (c->books[l] != -1)
maxval = venc->codebooks[c->books[l]].nentries; |
755bfeab |
// coded could be -1, but this still works, cause that is 0 |
5e56b30e |
if (coded[counter + k] < maxval)
break; |
a277ad84 |
}
assert(l != csub); |
a7adcf29 |
cval |= l << cshift; |
a277ad84 |
cshift += c->subclass;
} |
f11329e4 |
put_codeword(pb, book, cval); |
a277ad84 |
} |
62ca51b3 |
for (k = 0; k < c->dim; k++) { |
a7adcf29 |
int book = c->books[cval & (csub-1)]; |
09a0d8b3 |
int entry = coded[counter++]; |
a277ad84 |
cval >>= c->subclass; |
5e56b30e |
if (book == -1)
continue;
if (entry == -1)
entry = 0; |
f11329e4 |
put_codeword(pb, &venc->codebooks[book], entry); |
62ca51b3 |
}
}
|
a7adcf29 |
ff_vorbis_floor1_render_list(fc->list, fc->values, posts, coded,
fc->multiplier, floor, samples); |
62ca51b3 |
}
|
a7adcf29 |
static float *put_vector(vorbis_enc_codebook *book, PutBitContext *pb,
float *num) |
5e56b30e |
{ |
f8a6a56a |
int i, entry = -1;
float distance = FLT_MAX; |
6f17618a |
assert(book->dimentions);
for (i = 0; i < book->nentries; i++) { |
f8a6a56a |
float * vec = book->dimentions + i * book->ndimentions, d = book->pow2[i]; |
6f17618a |
int j; |
5e56b30e |
if (!book->lens[i])
continue; |
35af7a9b |
for (j = 0; j < book->ndimentions; j++)
d -= vec[j] * num[j]; |
f8a6a56a |
if (distance > d) { |
a7adcf29 |
entry = i; |
6f17618a |
distance = d;
}
} |
f11329e4 |
put_codeword(pb, book, entry); |
6f17618a |
return &book->dimentions[entry * book->ndimentions];
} |
504d1952 |
|
a7adcf29 |
static void residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
PutBitContext *pb, float *coeffs, int samples, |
5e56b30e |
int real_ch)
{ |
6f17618a |
int pass, i, j, p, k; |
a7adcf29 |
int psize = rc->partition_size; |
6f17618a |
int partitions = (rc->end - rc->begin) / psize; |
a7adcf29 |
int channels = (rc->type == 2) ? 1 : real_ch; |
d66a546f |
int classes[MAX_CHANNELS][NUM_RESIDUE_PARTITIONS]; |
6f17618a |
int classwords = venc->codebooks[rc->classbook].ndimentions; |
e3df7fc6 |
|
7f44dfe2 |
assert(rc->type == 2);
assert(real_ch == 2);
for (p = 0; p < partitions; p++) {
float max1 = 0., max2 = 0.;
int s = rc->begin + p * psize;
for (k = s; k < s + psize; k += 2) { |
c2ee47ac |
max1 = FFMAX(max1, fabs(coeffs[ k / real_ch]));
max2 = FFMAX(max2, fabs(coeffs[samples + k / real_ch])); |
7f44dfe2 |
}
|
5e56b30e |
for (i = 0; i < rc->classifications - 1; i++)
if (max1 < rc->maxes[i][0] && max2 < rc->maxes[i][1])
break; |
7f44dfe2 |
classes[0][p] = i;
}
|
6f17618a |
for (pass = 0; pass < 8; pass++) {
p = 0;
while (p < partitions) { |
35af7a9b |
if (pass == 0)
for (j = 0; j < channels; j++) { |
05dee1b7 |
vorbis_enc_codebook * book = &venc->codebooks[rc->classbook]; |
35af7a9b |
int entry = 0;
for (i = 0; i < classwords; i++) {
entry *= rc->classifications;
entry += classes[j][p + i];
}
put_codeword(pb, book, entry); |
6f17618a |
}
for (i = 0; i < classwords && p < partitions; i++, p++) {
for (j = 0; j < channels; j++) {
int nbook = rc->books[classes[j][p]][pass]; |
05dee1b7 |
vorbis_enc_codebook * book = &venc->codebooks[nbook]; |
a7adcf29 |
float *buf = coeffs + samples*j + rc->begin + p*psize; |
5e56b30e |
if (nbook == -1)
continue; |
504d1952 |
|
e3df7fc6 |
assert(rc->type == 0 || rc->type == 2); |
6f17618a |
assert(!(psize % book->ndimentions)); |
504d1952 |
|
e3df7fc6 |
if (rc->type == 0) { |
4c588d8e |
for (k = 0; k < psize; k += book->ndimentions) { |
a7adcf29 |
float *a = put_vector(book, pb, &buf[k]); |
4c588d8e |
int l; |
35af7a9b |
for (l = 0; l < book->ndimentions; l++)
buf[k + l] -= a[l]; |
4c588d8e |
} |
e3df7fc6 |
} else { |
ac0057f3 |
int s = rc->begin + p * psize, a1, b1;
a1 = (s % real_ch) * samples;
b1 = s / real_ch; |
a7adcf29 |
s = real_ch * samples; |
e3df7fc6 |
for (k = 0; k < psize; k += book->ndimentions) { |
ac0057f3 |
int dim, a2 = a1, b2 = b1; |
d66a546f |
float vec[MAX_CODEBOOK_DIM], *pv = vec; |
ac0057f3 |
for (dim = book->ndimentions; dim--; ) {
*pv++ = coeffs[a2 + b2]; |
35af7a9b |
if ((a2 += samples) == s) { |
a7adcf29 |
a2 = 0; |
35af7a9b |
b2++;
} |
ac0057f3 |
}
pv = put_vector(book, pb, vec);
for (dim = book->ndimentions; dim--; ) {
coeffs[a1 + b1] -= *pv++; |
35af7a9b |
if ((a1 += samples) == s) { |
a7adcf29 |
a1 = 0; |
35af7a9b |
b1++;
} |
ac0057f3 |
} |
e3df7fc6 |
}
} |
6f17618a |
}
}
}
} |
504d1952 |
}
|
edac49da |
static int apply_window_and_mdct(vorbis_enc_context *venc, const signed short *audio, |
a7adcf29 |
int samples) |
5e56b30e |
{ |
f71b6d70 |
int i, j, channel;
const float * win = venc->win[0]; |
00757448 |
int window_len = 1 << (venc->log2_blocksize[0] - 1);
float n = (float)(1 << venc->log2_blocksize[0]) / 4.; |
f71b6d70 |
// FIXME use dsp
|
0b8e7ab0 |
if (!venc->have_saved && !samples)
return 0; |
f71b6d70 |
|
a7adcf29 |
if (venc->have_saved) { |
5e56b30e |
for (channel = 0; channel < venc->channels; channel++) |
a7adcf29 |
memcpy(venc->samples + channel * window_len * 2,
venc->saved + channel * window_len, sizeof(float) * window_len);
} else { |
5e56b30e |
for (channel = 0; channel < venc->channels; channel++) |
a7adcf29 |
memset(venc->samples + channel * window_len * 2, 0,
sizeof(float) * window_len);
} |
f71b6d70 |
if (samples) {
for (channel = 0; channel < venc->channels; channel++) { |
f4e5e657 |
float * offset = venc->samples + channel*window_len*2 + window_len; |
f71b6d70 |
j = channel;
for (i = 0; i < samples; i++, j += venc->channels) |
344f5c9f |
offset[i] = audio[j] / 32768. / n * win[window_len - i - 1]; |
f71b6d70 |
}
} else { |
5e56b30e |
for (channel = 0; channel < venc->channels; channel++) |
a7adcf29 |
memset(venc->samples + channel * window_len * 2 + window_len,
0, sizeof(float) * window_len); |
f71b6d70 |
}
|
5e56b30e |
for (channel = 0; channel < venc->channels; channel++) |
26f548bb |
venc->mdct[0].mdct_calc(&venc->mdct[0], venc->coeffs + channel * window_len, |
a7adcf29 |
venc->samples + channel * window_len * 2); |
f71b6d70 |
if (samples) {
for (channel = 0; channel < venc->channels; channel++) { |
a7adcf29 |
float *offset = venc->saved + channel * window_len; |
f71b6d70 |
j = channel;
for (i = 0; i < samples; i++, j += venc->channels) |
344f5c9f |
offset[i] = audio[j] / 32768. / n * win[i]; |
f71b6d70 |
}
venc->have_saved = 1;
} else {
venc->have_saved = 0;
}
return 1;
} |
504d1952 |
|
a7adcf29 |
static av_cold int vorbis_encode_init(AVCodecContext *avccontext) |
6f17618a |
{ |
a7adcf29 |
vorbis_enc_context *venc = avccontext->priv_data; |
b452ee42 |
|
0c4630f2 |
if (avccontext->channels != 2) { |
2d2b5a14 |
av_log(avccontext, AV_LOG_ERROR, "Current FFmpeg Vorbis encoder only supports 2 channels.\n"); |
0c4630f2 |
return -1;
} |
8d38e5e5 |
|
6f17618a |
create_vorbis_context(venc, avccontext); |
b452ee42 |
|
35af7a9b |
if (avccontext->flags & CODEC_FLAG_QSCALE)
venc->quality = avccontext->global_quality / (float)FF_QP2LAMBDA / 10.;
else |
27b0d365 |
venc->quality = 0.03; |
2613f6c1 |
venc->quality *= venc->quality; |
b452ee42 |
|
6f17618a |
avccontext->extradata_size = put_main_header(venc, (uint8_t**)&avccontext->extradata); |
b452ee42 |
|
a7adcf29 |
avccontext->frame_size = 1 << (venc->log2_blocksize[0] - 1); |
6f17618a |
|
a7adcf29 |
avccontext->coded_frame = avcodec_alloc_frame(); |
6f17618a |
avccontext->coded_frame->key_frame = 1;
return 0; |
b452ee42 |
}
|
a7adcf29 |
static int vorbis_encode_frame(AVCodecContext *avccontext,
unsigned char *packets,
int buf_size, void *data) |
504d1952 |
{ |
a7adcf29 |
vorbis_enc_context *venc = avccontext->priv_data; |
edac49da |
const signed short *audio = data; |
b1f6c8b1 |
int samples = data ? avccontext->frame_size : 0; |
a7adcf29 |
vorbis_enc_mode *mode;
vorbis_enc_mapping *mapping; |
b9b04023 |
PutBitContext pb;
int i;
|
5e56b30e |
if (!apply_window_and_mdct(venc, audio, samples))
return 0; |
00757448 |
samples = 1 << (venc->log2_blocksize[0] - 1); |
f71b6d70 |
|
b9b04023 |
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
|
a7adcf29 |
mode = &venc->modes[0]; |
b9b04023 |
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++) { |
a7adcf29 |
vorbis_enc_floor *fc = &venc->floors[mapping->floor[mapping->mux[i]]]; |
0a6b1a9f |
uint16_t posts[MAX_FLOOR_VALUES]; |
cf0f2642 |
floor_fit(venc, fc, &venc->coeffs[i * samples], posts, samples); |
6e8ef5ae |
floor_encode(venc, fc, &pb, posts, &venc->floor[i * samples], samples); |
b9b04023 |
} |
504d1952 |
|
5e56b30e |
for (i = 0; i < venc->channels * samples; i++) |
2eb3db5f |
venc->coeffs[i] /= venc->floor[i]; |
b452ee42 |
|
9d74ff0e |
for (i = 0; i < mapping->coupling_steps; i++) { |
a7adcf29 |
float *mag = venc->coeffs + mapping->magnitude[i] * samples;
float *ang = venc->coeffs + mapping->angle[i] * samples; |
9d74ff0e |
int j;
for (j = 0; j < samples; j++) {
float a = ang[j]; |
64c82a74 |
ang[j] -= mag[j]; |
5e56b30e |
if (mag[j] > 0)
ang[j] = -ang[j];
if (ang[j] < 0)
mag[j] = a; |
9d74ff0e |
}
}
|
a7adcf29 |
residue_encode(venc, &venc->residues[mapping->residue[mapping->mux[0]]],
&pb, venc->coeffs, samples, venc->channels); |
b452ee42 |
|
91ba93e6 |
avccontext->coded_frame->pts = venc->sample_count;
venc->sample_count += avccontext->frame_size; |
7a82a10a |
flush_put_bits(&pb); |
5200b901 |
return put_bits_count(&pb) >> 3; |
504d1952 |
}
|
a7adcf29 |
static av_cold int vorbis_encode_close(AVCodecContext *avccontext) |
504d1952 |
{ |
a7adcf29 |
vorbis_enc_context *venc = avccontext->priv_data; |
ae9b187a |
int i;
|
35af7a9b |
if (venc->codebooks)
for (i = 0; i < venc->ncodebooks; i++) {
av_freep(&venc->codebooks[i].lens);
av_freep(&venc->codebooks[i].codewords);
av_freep(&venc->codebooks[i].quantlist);
av_freep(&venc->codebooks[i].dimentions);
av_freep(&venc->codebooks[i].pow2);
} |
ae9b187a |
av_freep(&venc->codebooks);
|
35af7a9b |
if (venc->floors)
for (i = 0; i < venc->nfloors; i++) {
int j;
if (venc->floors[i].classes)
for (j = 0; j < venc->floors[i].nclasses; j++)
av_freep(&venc->floors[i].classes[j].books); |
41955099 |
av_freep(&venc->floors[i].classes); |
35af7a9b |
av_freep(&venc->floors[i].partition_to_class);
av_freep(&venc->floors[i].list);
} |
ae9b187a |
av_freep(&venc->floors);
|
35af7a9b |
if (venc->residues)
for (i = 0; i < venc->nresidues; i++) {
av_freep(&venc->residues[i].books);
av_freep(&venc->residues[i].maxes);
} |
ae9b187a |
av_freep(&venc->residues);
|
35af7a9b |
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); |
41094002 |
av_freep(&venc->mappings[i].magnitude);
av_freep(&venc->mappings[i].angle); |
35af7a9b |
} |
ae9b187a |
av_freep(&venc->mappings);
av_freep(&venc->modes); |
504d1952 |
|
6b03d096 |
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]);
|
504d1952 |
av_freep(&avccontext->coded_frame);
av_freep(&avccontext->extradata);
return 0 ;
}
|
e7e2df27 |
AVCodec ff_vorbis_encoder = { |
ec6402b7 |
.name = "vorbis",
.type = AVMEDIA_TYPE_AUDIO,
.id = CODEC_ID_VORBIS,
.priv_data_size = sizeof(vorbis_enc_context),
.init = vorbis_encode_init,
.encode = vorbis_encode_frame,
.close = vorbis_encode_close, |
35f7c39a |
.capabilities= CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL, |
5d6e4c16 |
.sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE}, |
fe4bf374 |
.long_name = NULL_IF_CONFIG_SMALL("Vorbis"), |
504d1952 |
}; |