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FFmpeg/libavcodec/vorbisenc.c
Michael Niedermayer 72153419b5 Merge remote branch 'qatar/master' 
* qatar/master: (33 commits)
  rtpdec_qdm2: Don't try to parse data packet if no configuration is received
  ac3enc: put the counting of stereo rematrixing bits in the same place to make the code easier to understand.
  ac3enc: clean up count_frame_bits() and count_frame_bits_fixed()
  mpegvideo: make FF_DEBUG_DCT_COEFF output coeffs via av_log() instead of just via AVFrame.
  srtdec: make sure we don't write past the end of buffer
  wmaenc: improve channel count and bitrate error handling in encode_init()
  matroskaenc: make sure we don't produce invalid file with no codec ID
  matroskadec: check that pointers were initialized before accessing them
  lavf: fix function name in compute_pkt_fields2 av_dlog message
  lavf: fix av_find_best_stream when providing a wanted stream.
  lavf: fix av_find_best_stream when decoder_ret is given and using a related stream.
  ffmpeg: factorize quality calculation
  tiff: add support for SamplesPerPixel tag in tiff_decode_tag()
  tiff: Prefer enum TiffCompr over int for TiffContext.compr.
  mov: Support edit list atom version 1.
  configure: Enable libpostproc automatically if GPL code is enabled.
  Cosmetics: fix prototypes in oggdec
  oggdec: fix memleak with continuous streams.
  matroskaenc: add missing new line in av_log() call
  dnxhdenc: add AVClass in private context.
  ...

swscale changes largely rewritten by me or replaced by baptsites due to lots of bugs in ronalds code.
Above code is also just in case its not obvios to a large extended duplicates that where cherry picked
from ffmpeg.

Conflicts:
	configure
	ffmpeg.c
	libavformat/matroskaenc.c
	libavutil/pixfmt.h
	libswscale/ppc/swscale_template.c
	libswscale/swscale.c
	libswscale/swscale_template.c
	libswscale/utils.c
	libswscale/x86/swscale_template.c
	tests/fate/h264.mak
	tests/ref/lavfi/pixdesc_le
	tests/ref/lavfi/pixfmts_copy_le
	tests/ref/lavfi/pixfmts_null_le
	tests/ref/lavfi/pixfmts_scale_le
	tests/ref/lavfi/pixfmts_vflip_le

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2011-05-13 04:40:40 +02:00

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/*
* copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
*
* 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
* Native Vorbis encoder.
* @author Oded Shimon <ods15@ods15.dyndns.org>
*/
#include <float.h>
#include "avcodec.h"
#include "dsputil.h"
#include "fft.h"
#include "vorbis.h"
#include "vorbis_enc_data.h"
#define BITSTREAM_WRITER_LE
#include "put_bits.h"
#undef NDEBUG
#include <assert.h>
typedef struct {
int nentries;
uint8_t *lens;
uint32_t *codewords;
int ndimentions;
float min;
float delta;
int seq_p;
int lookup;
int *quantlist;
float *dimentions;
float *pow2;
} vorbis_enc_codebook;
typedef struct {
int dim;
int subclass;
int masterbook;
int *books;
} vorbis_enc_floor_class;
typedef struct {
int partitions;
int *partition_to_class;
int nclasses;
vorbis_enc_floor_class *classes;
int multiplier;
int rangebits;
int values;
vorbis_floor1_entry *list;
} vorbis_enc_floor;
typedef struct {
int type;
int begin;
int end;
int partition_size;
int classifications;
int classbook;
int8_t (*books)[8];
float (*maxes)[2];
} vorbis_enc_residue;
typedef struct {
int submaps;
int *mux;
int *floor;
int *residue;
int coupling_steps;
int *magnitude;
int *angle;
} vorbis_enc_mapping;
typedef struct {
int blockflag;
int mapping;
} vorbis_enc_mode;
typedef struct {
int channels;
int sample_rate;
int log2_blocksize[2];
FFTContext 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
float quality;
int ncodebooks;
vorbis_enc_codebook *codebooks;
int nfloors;
vorbis_enc_floor *floors;
int nresidues;
vorbis_enc_residue *residues;
int nmappings;
vorbis_enc_mapping *mappings;
int nmodes;
vorbis_enc_mode *modes;
int64_t sample_count;
} vorbis_enc_context;
#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)
static inline void put_codeword(PutBitContext *pb, vorbis_enc_codebook *cb,
int entry)
{
assert(entry >= 0);
assert(entry < cb->nentries);
assert(cb->lens[entry]);
put_bits(pb, cb->lens[entry], cb->codewords[entry]);
}
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)
return dimentions *entries;
return 0;
}
static void ready_codebook(vorbis_enc_codebook *cb)
{
int i;
ff_vorbis_len2vlc(cb->lens, cb->codewords, cb->nentries);
if (!cb->lookup) {
cb->pow2 = 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);
cb->pow2 = av_mallocz(sizeof(float) * cb->nentries);
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];
cb->pow2[i] += cb->dimentions[i * cb->ndimentions + j] * cb->dimentions[i * cb->ndimentions + j];
div *= vals;
}
cb->pow2[i] /= 2.;
}
}
}
static void ready_residue(vorbis_enc_residue *rc, vorbis_enc_context *venc)
{
int i;
assert(rc->type == 2);
rc->maxes = av_mallocz(sizeof(float[2]) * rc->classifications);
for (i = 0; i < rc->classifications; i++) {
int j;
vorbis_enc_codebook * cb;
for (j = 0; j < 8; j++)
if (rc->books[i][j] != -1)
break;
if (j == 8) // zero
continue;
cb = &venc->codebooks[rc->books[i][j]];
assert(cb->ndimentions >= 2);
assert(cb->lookup);
for (j = 0; j < cb->nentries; j++) {
float a;
if (!cb->lens[j])
continue;
a = fabs(cb->dimentions[j * cb->ndimentions]);
if (a > rc->maxes[i][0])
rc->maxes[i][0] = a;
a = fabs(cb->dimentions[j * cb->ndimentions + 1]);
if (a > rc->maxes[i][1])
rc->maxes[i][1] = a;
}
}
// small bias
for (i = 0; i < rc->classifications; i++) {
rc->maxes[i][0] += 0.8;
rc->maxes[i][1] += 0.8;
}
}
static void create_vorbis_context(vorbis_enc_context *venc,
AVCodecContext *avccontext)
{
vorbis_enc_floor *fc;
vorbis_enc_residue *rc;
vorbis_enc_mapping *mc;
int i, book;
venc->channels = avccontext->channels;
venc->sample_rate = avccontext->sample_rate;
venc->log2_blocksize[0] = venc->log2_blocksize[1] = 11;
venc->ncodebooks = FF_ARRAY_ELEMS(cvectors);
venc->codebooks = av_malloc(sizeof(vorbis_enc_codebook) * venc->ncodebooks);
// codebook 0..14 - floor1 book, values 0..255
// codebook 15 residue masterbook
// codebook 16..29 residue
for (book = 0; book < venc->ncodebooks; book++) {
vorbis_enc_codebook *cb = &venc->codebooks[book];
int vals;
cb->ndimentions = cvectors[book].dim;
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;
cb->lens = av_malloc(sizeof(uint8_t) * cb->nentries);
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);
if (cb->lookup) {
vals = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries);
cb->quantlist = av_malloc(sizeof(int) * vals);
for (i = 0; i < vals; i++)
cb->quantlist[i] = cvectors[book].quant[i];
} else {
cb->quantlist = NULL;
}
ready_codebook(cb);
}
venc->nfloors = 1;
venc->floors = av_malloc(sizeof(vorbis_enc_floor) * venc->nfloors);
// just 1 floor
fc = &venc->floors[0];
fc->partitions = NUM_FLOOR_PARTITIONS;
fc->partition_to_class = av_malloc(sizeof(int) * fc->partitions);
fc->nclasses = 0;
for (i = 0; i < fc->partitions; i++) {
static const int a[] = {0, 1, 2, 2, 3, 3, 4, 4};
fc->partition_to_class[i] = a[i];
fc->nclasses = FFMAX(fc->nclasses, fc->partition_to_class[i]);
}
fc->nclasses++;
fc->classes = av_malloc(sizeof(vorbis_enc_floor_class) * fc->nclasses);
for (i = 0; i < fc->nclasses; i++) {
vorbis_enc_floor_class * c = &fc->classes[i];
int j, books;
c->dim = floor_classes[i].dim;
c->subclass = floor_classes[i].subclass;
c->masterbook = floor_classes[i].masterbook;
books = (1 << c->subclass);
c->books = av_malloc(sizeof(int) * books);
for (j = 0; j < books; j++)
c->books[j] = floor_classes[i].nbooks[j];
}
fc->multiplier = 2;
fc->rangebits = venc->log2_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(vorbis_floor1_entry) * fc->values);
fc->list[0].x = 0;
fc->list[1].x = 1 << fc->rangebits;
for (i = 2; i < fc->values; i++) {
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
};
fc->list[i].x = a[i - 2];
}
ff_vorbis_ready_floor1_list(fc->list, fc->values);
venc->nresidues = 1;
venc->residues = av_malloc(sizeof(vorbis_enc_residue) * venc->nresidues);
// single residue
rc = &venc->residues[0];
rc->type = 2;
rc->begin = 0;
rc->end = 1600;
rc->partition_size = 32;
rc->classifications = 10;
rc->classbook = 15;
rc->books = av_malloc(sizeof(*rc->books) * rc->classifications);
{
static const int8_t a[10][8] = {
{ -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, },
};
memcpy(rc->books, a, sizeof a);
}
ready_residue(rc, venc);
venc->nmappings = 1;
venc->mappings = av_malloc(sizeof(vorbis_enc_mapping) * 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;
}
mc->coupling_steps = venc->channels == 2 ? 1 : 0;
mc->magnitude = av_malloc(sizeof(int) * mc->coupling_steps);
mc->angle = av_malloc(sizeof(int) * mc->coupling_steps);
if (mc->coupling_steps) {
mc->magnitude[0] = 0;
mc->angle[0] = 1;
}
venc->nmodes = 1;
venc->modes = av_malloc(sizeof(vorbis_enc_mode) * 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->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);
venc->win[0] = ff_vorbis_vwin[venc->log2_blocksize[0] - 6];
venc->win[1] = ff_vorbis_vwin[venc->log2_blocksize[1] - 6];
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);
}
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 |= (1U << 31);
mant = -mant;
}
res |= mant | (exp << 21);
put_bits32(pb, res);
}
static void put_codebook_header(PutBitContext *pb, vorbis_enc_codebook *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->lens[i] < cb->lens[i-1])
break;
if (i == cb->nentries)
ordered = 1;
put_bits(pb, 1, ordered);
if (ordered) {
int len = cb->lens[0];
put_bits(pb, 5, len - 1);
i = 0;
while (i < cb->nentries) {
int j;
for (j = 0; j+i < cb->nentries; j++)
if (cb->lens[j+i] != 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->lens[i])
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->lens[i]);
if (cb->lens[i])
put_bits(pb, 5, cb->lens[i] - 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, vorbis_enc_floor *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, vorbis_enc_residue *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(vorbis_enc_context *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_bits32(&pb, 0); // version
put_bits(&pb, 8, venc->channels);
put_bits32(&pb, venc->sample_rate);
put_bits32(&pb, 0); // bitrate
put_bits32(&pb, 0); // bitrate
put_bits32(&pb, 0); // bitrate
put_bits(&pb, 4, venc->log2_blocksize[0]);
put_bits(&pb, 4, venc->log2_blocksize[1]);
put_bits(&pb, 1, 1); // framing
flush_put_bits(&pb);
hlens[0] = put_bits_count(&pb) >> 3;
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_bits32(&pb, 0); // vendor length TODO
put_bits32(&pb, 0); // amount of comments
put_bits(&pb, 1, 1); // framing
flush_put_bits(&pb);
hlens[1] = put_bits_count(&pb) >> 3;
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++) {
vorbis_enc_mapping *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, !!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]);
}
}
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) >> 3;
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 float get_floor_average(vorbis_enc_floor * fc, float *coeffs, int i)
{
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;
for (j = begin; j < end; j++)
average += fabs(coeffs[j]);
return average / (end - begin);
}
static void floor_fit(vorbis_enc_context *venc, vorbis_enc_floor *fc,
float *coeffs, uint16_t *posts, int samples)
{
int range = 255 / fc->multiplier + 1;
int i;
float tot_average = 0.;
float averages[MAX_FLOOR_VALUES];
for (i = 0; i < fc->values; i++) {
averages[i] = get_floor_average(fc, coeffs, i);
tot_average += averages[i];
}
tot_average /= fc->values;
tot_average /= venc->quality;
for (i = 0; i < fc->values; i++) {
int position = fc->list[fc->list[i].sort].x;
float average = averages[i];
int j;
average = sqrt(tot_average * average) * pow(1.25f, position*0.005f); // MAGIC!
for (j = 0; j < range - 1; j++)
if (ff_vorbis_floor1_inverse_db_table[j * fc->multiplier] > average)
break;
posts[fc->list[i].sort] = j;
}
}
static int render_point(int x0, int y0, int x1, int y1, int x)
{
return y0 + (x - x0) * (y1 - y0) / (x1 - x0);
}
static void floor_encode(vorbis_enc_context *venc, vorbis_enc_floor *fc,
PutBitContext *pb, uint16_t *posts,
float *floor, int samples)
{
int range = 255 / fc->multiplier + 1;
int coded[MAX_FLOOR_VALUES]; // first 2 values are unused
int i, counter;
put_bits(pb, 1, 1); // non zero
put_bits(pb, ilog(range - 1), posts[0]);
put_bits(pb, ilog(range - 1), posts[1]);
coded[0] = coded[1] = 1;
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);
int highroom = range - predicted;
int lowroom = predicted;
int room = FFMIN(highroom, lowroom);
if (predicted == posts[i]) {
coded[i] = 0; // must be used later as flag!
continue;
} else {
if (!coded[fc->list[i].low ])
coded[fc->list[i].low ] = -1;
if (!coded[fc->list[i].high])
coded[fc->list[i].high] = -1;
}
if (posts[i] > predicted) {
if (posts[i] - predicted > room)
coded[i] = posts[i] - predicted + lowroom;
else
coded[i] = (posts[i] - predicted) << 1;
} else {
if (predicted - posts[i] > room)
coded[i] = predicted - posts[i] + highroom - 1;
else
coded[i] = ((predicted - posts[i]) << 1) - 1;
}
}
counter = 2;
for (i = 0; i < fc->partitions; i++) {
vorbis_enc_floor_class * c = &fc->classes[fc->partition_to_class[i]];
int k, cval = 0, csub = 1<<c->subclass;
if (c->subclass) {
vorbis_enc_codebook * book = &venc->codebooks[c->masterbook];
int cshift = 0;
for (k = 0; k < c->dim; k++) {
int l;
for (l = 0; l < csub; l++) {
int maxval = 1;
if (c->books[l] != -1)
maxval = venc->codebooks[c->books[l]].nentries;
// coded could be -1, but this still works, cause that is 0
if (coded[counter + k] < maxval)
break;
}
assert(l != csub);
cval |= l << cshift;
cshift += c->subclass;
}
put_codeword(pb, book, cval);
}
for (k = 0; k < c->dim; k++) {
int book = c->books[cval & (csub-1)];
int entry = coded[counter++];
cval >>= c->subclass;
if (book == -1)
continue;
if (entry == -1)
entry = 0;
put_codeword(pb, &venc->codebooks[book], entry);
}
}
ff_vorbis_floor1_render_list(fc->list, fc->values, posts, coded,
fc->multiplier, floor, samples);
}
static float *put_vector(vorbis_enc_codebook *book, PutBitContext *pb,
float *num)
{
int i, entry = -1;
float distance = FLT_MAX;
assert(book->dimentions);
for (i = 0; i < book->nentries; i++) {
float * vec = book->dimentions + i * book->ndimentions, d = book->pow2[i];
int j;
if (!book->lens[i])
continue;
for (j = 0; j < book->ndimentions; j++)
d -= vec[j] * num[j];
if (distance > d) {
entry = i;
distance = d;
}
}
put_codeword(pb, book, entry);
return &book->dimentions[entry * book->ndimentions];
}
static void residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
PutBitContext *pb, float *coeffs, int samples,
int real_ch)
{
int pass, i, j, p, k;
int psize = rc->partition_size;
int partitions = (rc->end - rc->begin) / psize;
int channels = (rc->type == 2) ? 1 : real_ch;
int classes[MAX_CHANNELS][NUM_RESIDUE_PARTITIONS];
int classwords = venc->codebooks[rc->classbook].ndimentions;
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) {
max1 = FFMAX(max1, fabs(coeffs[ k / real_ch]));
max2 = FFMAX(max2, fabs(coeffs[samples + k / real_ch]));
}
for (i = 0; i < rc->classifications - 1; i++)
if (max1 < rc->maxes[i][0] && max2 < rc->maxes[i][1])
break;
classes[0][p] = i;
}
for (pass = 0; pass < 8; pass++) {
p = 0;
while (p < partitions) {
if (pass == 0)
for (j = 0; j < channels; j++) {
vorbis_enc_codebook * book = &venc->codebooks[rc->classbook];
int entry = 0;
for (i = 0; i < classwords; i++) {
entry *= rc->classifications;
entry += classes[j][p + i];
}
put_codeword(pb, book, entry);
}
for (i = 0; i < classwords && p < partitions; i++, p++) {
for (j = 0; j < channels; j++) {
int nbook = rc->books[classes[j][p]][pass];
vorbis_enc_codebook * book = &venc->codebooks[nbook];
float *buf = coeffs + samples*j + rc->begin + p*psize;
if (nbook == -1)
continue;
assert(rc->type == 0 || rc->type == 2);
assert(!(psize % book->ndimentions));
if (rc->type == 0) {
for (k = 0; k < psize; k += book->ndimentions) {
float *a = put_vector(book, pb, &buf[k]);
int l;
for (l = 0; l < book->ndimentions; l++)
buf[k + l] -= a[l];
}
} else {
int s = rc->begin + p * psize, a1, b1;
a1 = (s % real_ch) * samples;
b1 = s / real_ch;
s = real_ch * samples;
for (k = 0; k < psize; k += book->ndimentions) {
int dim, a2 = a1, b2 = b1;
float vec[MAX_CODEBOOK_DIM], *pv = vec;
for (dim = book->ndimentions; dim--; ) {
*pv++ = coeffs[a2 + b2];
if ((a2 += samples) == s) {
a2 = 0;
b2++;
}
}
pv = put_vector(book, pb, vec);
for (dim = book->ndimentions; dim--; ) {
coeffs[a1 + b1] -= *pv++;
if ((a1 += samples) == s) {
a1 = 0;
b1++;
}
}
}
}
}
}
}
}
}
static int apply_window_and_mdct(vorbis_enc_context *venc, const signed short *audio,
int samples)
{
int i, j, channel;
const float * win = venc->win[0];
int window_len = 1 << (venc->log2_blocksize[0] - 1);
float n = (float)(1 << venc->log2_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. / n * win[window_len - i - 1];
}
} 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++)
venc->mdct[0].mdct_calc(&venc->mdct[0], venc->coeffs + channel * window_len,
venc->samples + channel * window_len * 2);
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. / n * win[i];
}
venc->have_saved = 1;
} else {
venc->have_saved = 0;
}
return 1;
}
static av_cold int vorbis_encode_init(AVCodecContext *avccontext)
{
vorbis_enc_context *venc = avccontext->priv_data;
if (avccontext->channels != 2) {
av_log(avccontext, AV_LOG_ERROR, "Current FFmpeg Vorbis encoder only supports 2 channels.\n");
return -1;
}
create_vorbis_context(venc, avccontext);
if (avccontext->flags & CODEC_FLAG_QSCALE)
venc->quality = avccontext->global_quality / (float)FF_QP2LAMBDA / 10.;
else
venc->quality = 0.03;
venc->quality *= venc->quality;
avccontext->extradata_size = put_main_header(venc, (uint8_t**)&avccontext->extradata);
avccontext->frame_size = 1 << (venc->log2_blocksize[0] - 1);
avccontext->coded_frame = avcodec_alloc_frame();
avccontext->coded_frame->key_frame = 1;
return 0;
}
static int vorbis_encode_frame(AVCodecContext *avccontext,
unsigned char *packets,
int buf_size, void *data)
{
vorbis_enc_context *venc = avccontext->priv_data;
const signed short *audio = data;
int samples = data ? avccontext->frame_size : 0;
vorbis_enc_mode *mode;
vorbis_enc_mapping *mapping;
PutBitContext pb;
int i;
if (!apply_window_and_mdct(venc, audio, samples))
return 0;
samples = 1 << (venc->log2_blocksize[0] - 1);
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++) {
vorbis_enc_floor *fc = &venc->floors[mapping->floor[mapping->mux[i]]];
uint16_t posts[MAX_FLOOR_VALUES];
floor_fit(venc, fc, &venc->coeffs[i * samples], posts, samples);
floor_encode(venc, fc, &pb, posts, &venc->floor[i * samples], samples);
}
for (i = 0; i < venc->channels * samples; i++)
venc->coeffs[i] /= venc->floor[i];
for (i = 0; i < mapping->coupling_steps; i++) {
float *mag = venc->coeffs + mapping->magnitude[i] * samples;
float *ang = venc->coeffs + mapping->angle[i] * samples;
int j;
for (j = 0; j < samples; j++) {
float a = ang[j];
ang[j] -= mag[j];
if (mag[j] > 0)
ang[j] = -ang[j];
if (ang[j] < 0)
mag[j] = a;
}
}
residue_encode(venc, &venc->residues[mapping->residue[mapping->mux[0]]],
&pb, venc->coeffs, samples, venc->channels);
avccontext->coded_frame->pts = venc->sample_count;
venc->sample_count += avccontext->frame_size;
flush_put_bits(&pb);
return put_bits_count(&pb) >> 3;
}
static av_cold int vorbis_encode_close(AVCodecContext *avccontext)
{
vorbis_enc_context *venc = avccontext->priv_data;
int i;
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);
}
av_freep(&venc->codebooks);
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);
av_freep(&venc->floors[i].classes);
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[i].maxes);
}
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[i].magnitude);
av_freep(&venc->mappings[i].angle);
}
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 ff_vorbis_encoder = {
"vorbis",
AVMEDIA_TYPE_AUDIO,
CODEC_ID_VORBIS,
sizeof(vorbis_enc_context),
vorbis_encode_init,
vorbis_encode_frame,
vorbis_encode_close,
.capabilities= CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
.sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
.long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
};
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