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authorDiego Biurrun <diego@biurrun.de>2011-04-17 19:44:33 +0200
committerDiego Biurrun <diego@biurrun.de>2011-04-23 14:23:20 +0200
commit046f3cb78903cd04846c49345b473244f095f1a5 (patch)
treef4f87c07e44cf2963cbaf5c4690b67c7fbe424bf /libavcodec/vorbisenc.c
parentf50d9377252431114e89514cf528825936efcbd9 (diff)
downloadffmpeg-046f3cb78903cd04846c49345b473244f095f1a5.tar.gz
vorbis: Rename decoder/encoder files to follow general file naming scheme.
Diffstat (limited to 'libavcodec/vorbisenc.c')
-rw-r--r--libavcodec/vorbisenc.c1116
1 files changed, 1116 insertions, 0 deletions
diff --git a/libavcodec/vorbisenc.c b/libavcodec/vorbisenc.c
new file mode 100644
index 0000000000..74933af4d5
--- /dev/null
+++ b/libavcodec/vorbisenc.c
@@ -0,0 +1,1116 @@
+/*
+ * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @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, uint_fast16_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, uint_fast16_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 Libav 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]]];
+ uint_fast16_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"),
+};