yading@10: /*
yading@10:  * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * Native Vorbis encoder.
yading@10:  * @author Oded Shimon <ods15@ods15.dyndns.org>
yading@10:  */
yading@10: 
yading@10: #include <float.h>
yading@10: #include "avcodec.h"
yading@10: #include "internal.h"
yading@10: #include "fft.h"
yading@10: #include "vorbis.h"
yading@10: #include "vorbis_enc_data.h"
yading@10: 
yading@10: #define BITSTREAM_WRITER_LE
yading@10: #include "put_bits.h"
yading@10: 
yading@10: #undef NDEBUG
yading@10: #include <assert.h>
yading@10: 
yading@10: typedef struct {
yading@10:     int nentries;
yading@10:     uint8_t *lens;
yading@10:     uint32_t *codewords;
yading@10:     int ndimensions;
yading@10:     float min;
yading@10:     float delta;
yading@10:     int seq_p;
yading@10:     int lookup;
yading@10:     int *quantlist;
yading@10:     float *dimensions;
yading@10:     float *pow2;
yading@10: } vorbis_enc_codebook;
yading@10: 
yading@10: typedef struct {
yading@10:     int dim;
yading@10:     int subclass;
yading@10:     int masterbook;
yading@10:     int *books;
yading@10: } vorbis_enc_floor_class;
yading@10: 
yading@10: typedef struct {
yading@10:     int partitions;
yading@10:     int *partition_to_class;
yading@10:     int nclasses;
yading@10:     vorbis_enc_floor_class *classes;
yading@10:     int multiplier;
yading@10:     int rangebits;
yading@10:     int values;
yading@10:     vorbis_floor1_entry *list;
yading@10: } vorbis_enc_floor;
yading@10: 
yading@10: typedef struct {
yading@10:     int type;
yading@10:     int begin;
yading@10:     int end;
yading@10:     int partition_size;
yading@10:     int classifications;
yading@10:     int classbook;
yading@10:     int8_t (*books)[8];
yading@10:     float (*maxes)[2];
yading@10: } vorbis_enc_residue;
yading@10: 
yading@10: typedef struct {
yading@10:     int submaps;
yading@10:     int *mux;
yading@10:     int *floor;
yading@10:     int *residue;
yading@10:     int coupling_steps;
yading@10:     int *magnitude;
yading@10:     int *angle;
yading@10: } vorbis_enc_mapping;
yading@10: 
yading@10: typedef struct {
yading@10:     int blockflag;
yading@10:     int mapping;
yading@10: } vorbis_enc_mode;
yading@10: 
yading@10: typedef struct {
yading@10:     int channels;
yading@10:     int sample_rate;
yading@10:     int log2_blocksize[2];
yading@10:     FFTContext mdct[2];
yading@10:     const float *win[2];
yading@10:     int have_saved;
yading@10:     float *saved;
yading@10:     float *samples;
yading@10:     float *floor;  // also used for tmp values for mdct
yading@10:     float *coeffs; // also used for residue after floor
yading@10:     float quality;
yading@10: 
yading@10:     int ncodebooks;
yading@10:     vorbis_enc_codebook *codebooks;
yading@10: 
yading@10:     int nfloors;
yading@10:     vorbis_enc_floor *floors;
yading@10: 
yading@10:     int nresidues;
yading@10:     vorbis_enc_residue *residues;
yading@10: 
yading@10:     int nmappings;
yading@10:     vorbis_enc_mapping *mappings;
yading@10: 
yading@10:     int nmodes;
yading@10:     vorbis_enc_mode *modes;
yading@10: 
yading@10:     int64_t next_pts;
yading@10: } vorbis_enc_context;
yading@10: 
yading@10: #define MAX_CHANNELS     2
yading@10: #define MAX_CODEBOOK_DIM 8
yading@10: 
yading@10: #define MAX_FLOOR_CLASS_DIM  4
yading@10: #define NUM_FLOOR_PARTITIONS 8
yading@10: #define MAX_FLOOR_VALUES     (MAX_FLOOR_CLASS_DIM*NUM_FLOOR_PARTITIONS+2)
yading@10: 
yading@10: #define RESIDUE_SIZE           1600
yading@10: #define RESIDUE_PART_SIZE      32
yading@10: #define NUM_RESIDUE_PARTITIONS (RESIDUE_SIZE/RESIDUE_PART_SIZE)
yading@10: 
yading@10: static inline int put_codeword(PutBitContext *pb, vorbis_enc_codebook *cb,
yading@10:                                int entry)
yading@10: {
yading@10:     assert(entry >= 0);
yading@10:     assert(entry < cb->nentries);
yading@10:     assert(cb->lens[entry]);
yading@10:     if (pb->size_in_bits - put_bits_count(pb) < cb->lens[entry])
yading@10:         return AVERROR(EINVAL);
yading@10:     put_bits(pb, cb->lens[entry], cb->codewords[entry]);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int cb_lookup_vals(int lookup, int dimensions, int entries)
yading@10: {
yading@10:     if (lookup == 1)
yading@10:         return ff_vorbis_nth_root(entries, dimensions);
yading@10:     else if (lookup == 2)
yading@10:         return dimensions *entries;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int ready_codebook(vorbis_enc_codebook *cb)
yading@10: {
yading@10:     int i;
yading@10: 
yading@10:     ff_vorbis_len2vlc(cb->lens, cb->codewords, cb->nentries);
yading@10: 
yading@10:     if (!cb->lookup) {
yading@10:         cb->pow2 = cb->dimensions = NULL;
yading@10:     } else {
yading@10:         int vals = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
yading@10:         cb->dimensions = av_malloc(sizeof(float) * cb->nentries * cb->ndimensions);
yading@10:         cb->pow2 = av_mallocz(sizeof(float) * cb->nentries);
yading@10:         if (!cb->dimensions || !cb->pow2)
yading@10:             return AVERROR(ENOMEM);
yading@10:         for (i = 0; i < cb->nentries; i++) {
yading@10:             float last = 0;
yading@10:             int j;
yading@10:             int div = 1;
yading@10:             for (j = 0; j < cb->ndimensions; j++) {
yading@10:                 int off;
yading@10:                 if (cb->lookup == 1)
yading@10:                     off = (i / div) % vals; // lookup type 1
yading@10:                 else
yading@10:                     off = i * cb->ndimensions + j; // lookup type 2
yading@10: 
yading@10:                 cb->dimensions[i * cb->ndimensions + j] = last + cb->min + cb->quantlist[off] * cb->delta;
yading@10:                 if (cb->seq_p)
yading@10:                     last = cb->dimensions[i * cb->ndimensions + j];
yading@10:                 cb->pow2[i] += cb->dimensions[i * cb->ndimensions + j] * cb->dimensions[i * cb->ndimensions + j];
yading@10:                 div *= vals;
yading@10:             }
yading@10:             cb->pow2[i] /= 2.;
yading@10:         }
yading@10:     }
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int ready_residue(vorbis_enc_residue *rc, vorbis_enc_context *venc)
yading@10: {
yading@10:     int i;
yading@10:     assert(rc->type == 2);
yading@10:     rc->maxes = av_mallocz(sizeof(float[2]) * rc->classifications);
yading@10:     if (!rc->maxes)
yading@10:         return AVERROR(ENOMEM);
yading@10:     for (i = 0; i < rc->classifications; i++) {
yading@10:         int j;
yading@10:         vorbis_enc_codebook * cb;
yading@10:         for (j = 0; j < 8; j++)
yading@10:             if (rc->books[i][j] != -1)
yading@10:                 break;
yading@10:         if (j == 8) // zero
yading@10:             continue;
yading@10:         cb = &venc->codebooks[rc->books[i][j]];
yading@10:         assert(cb->ndimensions >= 2);
yading@10:         assert(cb->lookup);
yading@10: 
yading@10:         for (j = 0; j < cb->nentries; j++) {
yading@10:             float a;
yading@10:             if (!cb->lens[j])
yading@10:                 continue;
yading@10:             a = fabs(cb->dimensions[j * cb->ndimensions]);
yading@10:             if (a > rc->maxes[i][0])
yading@10:                 rc->maxes[i][0] = a;
yading@10:             a = fabs(cb->dimensions[j * cb->ndimensions + 1]);
yading@10:             if (a > rc->maxes[i][1])
yading@10:                 rc->maxes[i][1] = a;
yading@10:         }
yading@10:     }
yading@10:     // small bias
yading@10:     for (i = 0; i < rc->classifications; i++) {
yading@10:         rc->maxes[i][0] += 0.8;
yading@10:         rc->maxes[i][1] += 0.8;
yading@10:     }
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int create_vorbis_context(vorbis_enc_context *venc,
yading@10:                                  AVCodecContext *avctx)
yading@10: {
yading@10:     vorbis_enc_floor   *fc;
yading@10:     vorbis_enc_residue *rc;
yading@10:     vorbis_enc_mapping *mc;
yading@10:     int i, book, ret;
yading@10: 
yading@10:     venc->channels    = avctx->channels;
yading@10:     venc->sample_rate = avctx->sample_rate;
yading@10:     venc->log2_blocksize[0] = venc->log2_blocksize[1] = 11;
yading@10: 
yading@10:     venc->ncodebooks = FF_ARRAY_ELEMS(cvectors);
yading@10:     venc->codebooks  = av_malloc(sizeof(vorbis_enc_codebook) * venc->ncodebooks);
yading@10:     if (!venc->codebooks)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     // codebook 0..14 - floor1 book, values 0..255
yading@10:     // codebook 15 residue masterbook
yading@10:     // codebook 16..29 residue
yading@10:     for (book = 0; book < venc->ncodebooks; book++) {
yading@10:         vorbis_enc_codebook *cb = &venc->codebooks[book];
yading@10:         int vals;
yading@10:         cb->ndimensions = cvectors[book].dim;
yading@10:         cb->nentries    = cvectors[book].real_len;
yading@10:         cb->min         = cvectors[book].min;
yading@10:         cb->delta       = cvectors[book].delta;
yading@10:         cb->lookup      = cvectors[book].lookup;
yading@10:         cb->seq_p       = 0;
yading@10: 
yading@10:         cb->lens      = av_malloc(sizeof(uint8_t)  * cb->nentries);
yading@10:         cb->codewords = av_malloc(sizeof(uint32_t) * cb->nentries);
yading@10:         if (!cb->lens || !cb->codewords)
yading@10:             return AVERROR(ENOMEM);
yading@10:         memcpy(cb->lens, cvectors[book].clens, cvectors[book].len);
yading@10:         memset(cb->lens + cvectors[book].len, 0, cb->nentries - cvectors[book].len);
yading@10: 
yading@10:         if (cb->lookup) {
yading@10:             vals = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
yading@10:             cb->quantlist = av_malloc(sizeof(int) * vals);
yading@10:             if (!cb->quantlist)
yading@10:                 return AVERROR(ENOMEM);
yading@10:             for (i = 0; i < vals; i++)
yading@10:                 cb->quantlist[i] = cvectors[book].quant[i];
yading@10:         } else {
yading@10:             cb->quantlist = NULL;
yading@10:         }
yading@10:         if ((ret = ready_codebook(cb)) < 0)
yading@10:             return ret;
yading@10:     }
yading@10: 
yading@10:     venc->nfloors = 1;
yading@10:     venc->floors  = av_malloc(sizeof(vorbis_enc_floor) * venc->nfloors);
yading@10:     if (!venc->floors)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     // just 1 floor
yading@10:     fc = &venc->floors[0];
yading@10:     fc->partitions         = NUM_FLOOR_PARTITIONS;
yading@10:     fc->partition_to_class = av_malloc(sizeof(int) * fc->partitions);
yading@10:     if (!fc->partition_to_class)
yading@10:         return AVERROR(ENOMEM);
yading@10:     fc->nclasses           = 0;
yading@10:     for (i = 0; i < fc->partitions; i++) {
yading@10:         static const int a[] = {0, 1, 2, 2, 3, 3, 4, 4};
yading@10:         fc->partition_to_class[i] = a[i];
yading@10:         fc->nclasses = FFMAX(fc->nclasses, fc->partition_to_class[i]);
yading@10:     }
yading@10:     fc->nclasses++;
yading@10:     fc->classes = av_malloc(sizeof(vorbis_enc_floor_class) * fc->nclasses);
yading@10:     if (!fc->classes)
yading@10:         return AVERROR(ENOMEM);
yading@10:     for (i = 0; i < fc->nclasses; i++) {
yading@10:         vorbis_enc_floor_class * c = &fc->classes[i];
yading@10:         int j, books;
yading@10:         c->dim        = floor_classes[i].dim;
yading@10:         c->subclass   = floor_classes[i].subclass;
yading@10:         c->masterbook = floor_classes[i].masterbook;
yading@10:         books         = (1 << c->subclass);
yading@10:         c->books      = av_malloc(sizeof(int) * books);
yading@10:         if (!c->books)
yading@10:             return AVERROR(ENOMEM);
yading@10:         for (j = 0; j < books; j++)
yading@10:             c->books[j] = floor_classes[i].nbooks[j];
yading@10:     }
yading@10:     fc->multiplier = 2;
yading@10:     fc->rangebits  = venc->log2_blocksize[0] - 1;
yading@10: 
yading@10:     fc->values = 2;
yading@10:     for (i = 0; i < fc->partitions; i++)
yading@10:         fc->values += fc->classes[fc->partition_to_class[i]].dim;
yading@10: 
yading@10:     fc->list = av_malloc(sizeof(vorbis_floor1_entry) * fc->values);
yading@10:     if (!fc->list)
yading@10:         return AVERROR(ENOMEM);
yading@10:     fc->list[0].x = 0;
yading@10:     fc->list[1].x = 1 << fc->rangebits;
yading@10:     for (i = 2; i < fc->values; i++) {
yading@10:         static const int a[] = {
yading@10:              93, 23,372,  6, 46,186,750, 14, 33, 65,
yading@10:             130,260,556,  3, 10, 18, 28, 39, 55, 79,
yading@10:             111,158,220,312,464,650,850
yading@10:         };
yading@10:         fc->list[i].x = a[i - 2];
yading@10:     }
yading@10:     if (ff_vorbis_ready_floor1_list(avctx, fc->list, fc->values))
yading@10:         return AVERROR_BUG;
yading@10: 
yading@10:     venc->nresidues = 1;
yading@10:     venc->residues  = av_malloc(sizeof(vorbis_enc_residue) * venc->nresidues);
yading@10:     if (!venc->residues)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     // single residue
yading@10:     rc = &venc->residues[0];
yading@10:     rc->type            = 2;
yading@10:     rc->begin           = 0;
yading@10:     rc->end             = 1600;
yading@10:     rc->partition_size  = 32;
yading@10:     rc->classifications = 10;
yading@10:     rc->classbook       = 15;
yading@10:     rc->books           = av_malloc(sizeof(*rc->books) * rc->classifications);
yading@10:     if (!rc->books)
yading@10:         return AVERROR(ENOMEM);
yading@10:     {
yading@10:         static const int8_t a[10][8] = {
yading@10:             { -1, -1, -1, -1, -1, -1, -1, -1, },
yading@10:             { -1, -1, 16, -1, -1, -1, -1, -1, },
yading@10:             { -1, -1, 17, -1, -1, -1, -1, -1, },
yading@10:             { -1, -1, 18, -1, -1, -1, -1, -1, },
yading@10:             { -1, -1, 19, -1, -1, -1, -1, -1, },
yading@10:             { -1, -1, 20, -1, -1, -1, -1, -1, },
yading@10:             { -1, -1, 21, -1, -1, -1, -1, -1, },
yading@10:             { 22, 23, -1, -1, -1, -1, -1, -1, },
yading@10:             { 24, 25, -1, -1, -1, -1, -1, -1, },
yading@10:             { 26, 27, 28, -1, -1, -1, -1, -1, },
yading@10:         };
yading@10:         memcpy(rc->books, a, sizeof a);
yading@10:     }
yading@10:     if ((ret = ready_residue(rc, venc)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     venc->nmappings = 1;
yading@10:     venc->mappings  = av_malloc(sizeof(vorbis_enc_mapping) * venc->nmappings);
yading@10:     if (!venc->mappings)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     // single mapping
yading@10:     mc = &venc->mappings[0];
yading@10:     mc->submaps = 1;
yading@10:     mc->mux     = av_malloc(sizeof(int) * venc->channels);
yading@10:     if (!mc->mux)
yading@10:         return AVERROR(ENOMEM);
yading@10:     for (i = 0; i < venc->channels; i++)
yading@10:         mc->mux[i] = 0;
yading@10:     mc->floor   = av_malloc(sizeof(int) * mc->submaps);
yading@10:     mc->residue = av_malloc(sizeof(int) * mc->submaps);
yading@10:     if (!mc->floor || !mc->residue)
yading@10:         return AVERROR(ENOMEM);
yading@10:     for (i = 0; i < mc->submaps; i++) {
yading@10:         mc->floor[i]   = 0;
yading@10:         mc->residue[i] = 0;
yading@10:     }
yading@10:     mc->coupling_steps = venc->channels == 2 ? 1 : 0;
yading@10:     mc->magnitude      = av_malloc(sizeof(int) * mc->coupling_steps);
yading@10:     mc->angle          = av_malloc(sizeof(int) * mc->coupling_steps);
yading@10:     if (!mc->magnitude || !mc->angle)
yading@10:         return AVERROR(ENOMEM);
yading@10:     if (mc->coupling_steps) {
yading@10:         mc->magnitude[0] = 0;
yading@10:         mc->angle[0]     = 1;
yading@10:     }
yading@10: 
yading@10:     venc->nmodes = 1;
yading@10:     venc->modes  = av_malloc(sizeof(vorbis_enc_mode) * venc->nmodes);
yading@10:     if (!venc->modes)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     // single mode
yading@10:     venc->modes[0].blockflag = 0;
yading@10:     venc->modes[0].mapping   = 0;
yading@10: 
yading@10:     venc->have_saved = 0;
yading@10:     venc->saved      = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2);
yading@10:     venc->samples    = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]));
yading@10:     venc->floor      = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2);
yading@10:     venc->coeffs     = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2);
yading@10:     if (!venc->saved || !venc->samples || !venc->floor || !venc->coeffs)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     venc->win[0] = ff_vorbis_vwin[venc->log2_blocksize[0] - 6];
yading@10:     venc->win[1] = ff_vorbis_vwin[venc->log2_blocksize[1] - 6];
yading@10: 
yading@10:     if ((ret = ff_mdct_init(&venc->mdct[0], venc->log2_blocksize[0], 0, 1.0)) < 0)
yading@10:         return ret;
yading@10:     if ((ret = ff_mdct_init(&venc->mdct[1], venc->log2_blocksize[1], 0, 1.0)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static void put_float(PutBitContext *pb, float f)
yading@10: {
yading@10:     int exp, mant;
yading@10:     uint32_t res = 0;
yading@10:     mant = (int)ldexp(frexp(f, &exp), 20);
yading@10:     exp += 788 - 20;
yading@10:     if (mant < 0) {
yading@10:         res |= (1U << 31);
yading@10:         mant = -mant;
yading@10:     }
yading@10:     res |= mant | (exp << 21);
yading@10:     put_bits32(pb, res);
yading@10: }
yading@10: 
yading@10: static void put_codebook_header(PutBitContext *pb, vorbis_enc_codebook *cb)
yading@10: {
yading@10:     int i;
yading@10:     int ordered = 0;
yading@10: 
yading@10:     put_bits(pb, 24, 0x564342); //magic
yading@10:     put_bits(pb, 16, cb->ndimensions);
yading@10:     put_bits(pb, 24, cb->nentries);
yading@10: 
yading@10:     for (i = 1; i < cb->nentries; i++)
yading@10:         if (cb->lens[i] < cb->lens[i-1])
yading@10:             break;
yading@10:     if (i == cb->nentries)
yading@10:         ordered = 1;
yading@10: 
yading@10:     put_bits(pb, 1, ordered);
yading@10:     if (ordered) {
yading@10:         int len = cb->lens[0];
yading@10:         put_bits(pb, 5, len - 1);
yading@10:         i = 0;
yading@10:         while (i < cb->nentries) {
yading@10:             int j;
yading@10:             for (j = 0; j+i < cb->nentries; j++)
yading@10:                 if (cb->lens[j+i] != len)
yading@10:                     break;
yading@10:             put_bits(pb, ilog(cb->nentries - i), j);
yading@10:             i += j;
yading@10:             len++;
yading@10:         }
yading@10:     } else {
yading@10:         int sparse = 0;
yading@10:         for (i = 0; i < cb->nentries; i++)
yading@10:             if (!cb->lens[i])
yading@10:                 break;
yading@10:         if (i != cb->nentries)
yading@10:             sparse = 1;
yading@10:         put_bits(pb, 1, sparse);
yading@10: 
yading@10:         for (i = 0; i < cb->nentries; i++) {
yading@10:             if (sparse)
yading@10:                 put_bits(pb, 1, !!cb->lens[i]);
yading@10:             if (cb->lens[i])
yading@10:                 put_bits(pb, 5, cb->lens[i] - 1);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     put_bits(pb, 4, cb->lookup);
yading@10:     if (cb->lookup) {
yading@10:         int tmp  = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
yading@10:         int bits = ilog(cb->quantlist[0]);
yading@10: 
yading@10:         for (i = 1; i < tmp; i++)
yading@10:             bits = FFMAX(bits, ilog(cb->quantlist[i]));
yading@10: 
yading@10:         put_float(pb, cb->min);
yading@10:         put_float(pb, cb->delta);
yading@10: 
yading@10:         put_bits(pb, 4, bits - 1);
yading@10:         put_bits(pb, 1, cb->seq_p);
yading@10: 
yading@10:         for (i = 0; i < tmp; i++)
yading@10:             put_bits(pb, bits, cb->quantlist[i]);
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void put_floor_header(PutBitContext *pb, vorbis_enc_floor *fc)
yading@10: {
yading@10:     int i;
yading@10: 
yading@10:     put_bits(pb, 16, 1); // type, only floor1 is supported
yading@10: 
yading@10:     put_bits(pb, 5, fc->partitions);
yading@10: 
yading@10:     for (i = 0; i < fc->partitions; i++)
yading@10:         put_bits(pb, 4, fc->partition_to_class[i]);
yading@10: 
yading@10:     for (i = 0; i < fc->nclasses; i++) {
yading@10:         int j, books;
yading@10: 
yading@10:         put_bits(pb, 3, fc->classes[i].dim - 1);
yading@10:         put_bits(pb, 2, fc->classes[i].subclass);
yading@10: 
yading@10:         if (fc->classes[i].subclass)
yading@10:             put_bits(pb, 8, fc->classes[i].masterbook);
yading@10: 
yading@10:         books = (1 << fc->classes[i].subclass);
yading@10: 
yading@10:         for (j = 0; j < books; j++)
yading@10:             put_bits(pb, 8, fc->classes[i].books[j] + 1);
yading@10:     }
yading@10: 
yading@10:     put_bits(pb, 2, fc->multiplier - 1);
yading@10:     put_bits(pb, 4, fc->rangebits);
yading@10: 
yading@10:     for (i = 2; i < fc->values; i++)
yading@10:         put_bits(pb, fc->rangebits, fc->list[i].x);
yading@10: }
yading@10: 
yading@10: static void put_residue_header(PutBitContext *pb, vorbis_enc_residue *rc)
yading@10: {
yading@10:     int i;
yading@10: 
yading@10:     put_bits(pb, 16, rc->type);
yading@10: 
yading@10:     put_bits(pb, 24, rc->begin);
yading@10:     put_bits(pb, 24, rc->end);
yading@10:     put_bits(pb, 24, rc->partition_size - 1);
yading@10:     put_bits(pb, 6, rc->classifications - 1);
yading@10:     put_bits(pb, 8, rc->classbook);
yading@10: 
yading@10:     for (i = 0; i < rc->classifications; i++) {
yading@10:         int j, tmp = 0;
yading@10:         for (j = 0; j < 8; j++)
yading@10:             tmp |= (rc->books[i][j] != -1) << j;
yading@10: 
yading@10:         put_bits(pb, 3, tmp & 7);
yading@10:         put_bits(pb, 1, tmp > 7);
yading@10: 
yading@10:         if (tmp > 7)
yading@10:             put_bits(pb, 5, tmp >> 3);
yading@10:     }
yading@10: 
yading@10:     for (i = 0; i < rc->classifications; i++) {
yading@10:         int j;
yading@10:         for (j = 0; j < 8; j++)
yading@10:             if (rc->books[i][j] != -1)
yading@10:                 put_bits(pb, 8, rc->books[i][j]);
yading@10:     }
yading@10: }
yading@10: 
yading@10: static int put_main_header(vorbis_enc_context *venc, uint8_t **out)
yading@10: {
yading@10:     int i;
yading@10:     PutBitContext pb;
yading@10:     uint8_t buffer[50000] = {0}, *p = buffer;
yading@10:     int buffer_len = sizeof buffer;
yading@10:     int len, hlens[3];
yading@10: 
yading@10:     // identification header
yading@10:     init_put_bits(&pb, p, buffer_len);
yading@10:     put_bits(&pb, 8, 1); //magic
yading@10:     for (i = 0; "vorbis"[i]; i++)
yading@10:         put_bits(&pb, 8, "vorbis"[i]);
yading@10:     put_bits32(&pb, 0); // version
yading@10:     put_bits(&pb,  8, venc->channels);
yading@10:     put_bits32(&pb, venc->sample_rate);
yading@10:     put_bits32(&pb, 0); // bitrate
yading@10:     put_bits32(&pb, 0); // bitrate
yading@10:     put_bits32(&pb, 0); // bitrate
yading@10:     put_bits(&pb,  4, venc->log2_blocksize[0]);
yading@10:     put_bits(&pb,  4, venc->log2_blocksize[1]);
yading@10:     put_bits(&pb,  1, 1); // framing
yading@10: 
yading@10:     flush_put_bits(&pb);
yading@10:     hlens[0] = put_bits_count(&pb) >> 3;
yading@10:     buffer_len -= hlens[0];
yading@10:     p += hlens[0];
yading@10: 
yading@10:     // comment header
yading@10:     init_put_bits(&pb, p, buffer_len);
yading@10:     put_bits(&pb, 8, 3); //magic
yading@10:     for (i = 0; "vorbis"[i]; i++)
yading@10:         put_bits(&pb, 8, "vorbis"[i]);
yading@10:     put_bits32(&pb, 0); // vendor length TODO
yading@10:     put_bits32(&pb, 0); // amount of comments
yading@10:     put_bits(&pb,  1, 1); // framing
yading@10: 
yading@10:     flush_put_bits(&pb);
yading@10:     hlens[1] = put_bits_count(&pb) >> 3;
yading@10:     buffer_len -= hlens[1];
yading@10:     p += hlens[1];
yading@10: 
yading@10:     // setup header
yading@10:     init_put_bits(&pb, p, buffer_len);
yading@10:     put_bits(&pb, 8, 5); //magic
yading@10:     for (i = 0; "vorbis"[i]; i++)
yading@10:         put_bits(&pb, 8, "vorbis"[i]);
yading@10: 
yading@10:     // codebooks
yading@10:     put_bits(&pb, 8, venc->ncodebooks - 1);
yading@10:     for (i = 0; i < venc->ncodebooks; i++)
yading@10:         put_codebook_header(&pb, &venc->codebooks[i]);
yading@10: 
yading@10:     // time domain, reserved, zero
yading@10:     put_bits(&pb,  6, 0);
yading@10:     put_bits(&pb, 16, 0);
yading@10: 
yading@10:     // floors
yading@10:     put_bits(&pb, 6, venc->nfloors - 1);
yading@10:     for (i = 0; i < venc->nfloors; i++)
yading@10:         put_floor_header(&pb, &venc->floors[i]);
yading@10: 
yading@10:     // residues
yading@10:     put_bits(&pb, 6, venc->nresidues - 1);
yading@10:     for (i = 0; i < venc->nresidues; i++)
yading@10:         put_residue_header(&pb, &venc->residues[i]);
yading@10: 
yading@10:     // mappings
yading@10:     put_bits(&pb, 6, venc->nmappings - 1);
yading@10:     for (i = 0; i < venc->nmappings; i++) {
yading@10:         vorbis_enc_mapping *mc = &venc->mappings[i];
yading@10:         int j;
yading@10:         put_bits(&pb, 16, 0); // mapping type
yading@10: 
yading@10:         put_bits(&pb, 1, mc->submaps > 1);
yading@10:         if (mc->submaps > 1)
yading@10:             put_bits(&pb, 4, mc->submaps - 1);
yading@10: 
yading@10:         put_bits(&pb, 1, !!mc->coupling_steps);
yading@10:         if (mc->coupling_steps) {
yading@10:             put_bits(&pb, 8, mc->coupling_steps - 1);
yading@10:             for (j = 0; j < mc->coupling_steps; j++) {
yading@10:                 put_bits(&pb, ilog(venc->channels - 1), mc->magnitude[j]);
yading@10:                 put_bits(&pb, ilog(venc->channels - 1), mc->angle[j]);
yading@10:             }
yading@10:         }
yading@10: 
yading@10:         put_bits(&pb, 2, 0); // reserved
yading@10: 
yading@10:         if (mc->submaps > 1)
yading@10:             for (j = 0; j < venc->channels; j++)
yading@10:                 put_bits(&pb, 4, mc->mux[j]);
yading@10: 
yading@10:         for (j = 0; j < mc->submaps; j++) {
yading@10:             put_bits(&pb, 8, 0); // reserved time configuration
yading@10:             put_bits(&pb, 8, mc->floor[j]);
yading@10:             put_bits(&pb, 8, mc->residue[j]);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     // modes
yading@10:     put_bits(&pb, 6, venc->nmodes - 1);
yading@10:     for (i = 0; i < venc->nmodes; i++) {
yading@10:         put_bits(&pb, 1, venc->modes[i].blockflag);
yading@10:         put_bits(&pb, 16, 0); // reserved window type
yading@10:         put_bits(&pb, 16, 0); // reserved transform type
yading@10:         put_bits(&pb, 8, venc->modes[i].mapping);
yading@10:     }
yading@10: 
yading@10:     put_bits(&pb, 1, 1); // framing
yading@10: 
yading@10:     flush_put_bits(&pb);
yading@10:     hlens[2] = put_bits_count(&pb) >> 3;
yading@10: 
yading@10:     len = hlens[0] + hlens[1] + hlens[2];
yading@10:     p = *out = av_mallocz(64 + len + len/255);
yading@10:     if (!p)
yading@10:         return AVERROR(ENOMEM);
yading@10: 
yading@10:     *p++ = 2;
yading@10:     p += av_xiphlacing(p, hlens[0]);
yading@10:     p += av_xiphlacing(p, hlens[1]);
yading@10:     buffer_len = 0;
yading@10:     for (i = 0; i < 3; i++) {
yading@10:         memcpy(p, buffer + buffer_len, hlens[i]);
yading@10:         p += hlens[i];
yading@10:         buffer_len += hlens[i];
yading@10:     }
yading@10: 
yading@10:     return p - *out;
yading@10: }
yading@10: 
yading@10: static float get_floor_average(vorbis_enc_floor * fc, float *coeffs, int i)
yading@10: {
yading@10:     int begin = fc->list[fc->list[FFMAX(i-1, 0)].sort].x;
yading@10:     int end   = fc->list[fc->list[FFMIN(i+1, fc->values - 1)].sort].x;
yading@10:     int j;
yading@10:     float average = 0;
yading@10: 
yading@10:     for (j = begin; j < end; j++)
yading@10:         average += fabs(coeffs[j]);
yading@10:     return average / (end - begin);
yading@10: }
yading@10: 
yading@10: static void floor_fit(vorbis_enc_context *venc, vorbis_enc_floor *fc,
yading@10:                       float *coeffs, uint16_t *posts, int samples)
yading@10: {
yading@10:     int range = 255 / fc->multiplier + 1;
yading@10:     int i;
yading@10:     float tot_average = 0.;
yading@10:     float averages[MAX_FLOOR_VALUES];
yading@10:     for (i = 0; i < fc->values; i++) {
yading@10:         averages[i] = get_floor_average(fc, coeffs, i);
yading@10:         tot_average += averages[i];
yading@10:     }
yading@10:     tot_average /= fc->values;
yading@10:     tot_average /= venc->quality;
yading@10: 
yading@10:     for (i = 0; i < fc->values; i++) {
yading@10:         int position  = fc->list[fc->list[i].sort].x;
yading@10:         float average = averages[i];
yading@10:         int j;
yading@10: 
yading@10:         average = sqrt(tot_average * average) * pow(1.25f, position*0.005f); // MAGIC!
yading@10:         for (j = 0; j < range - 1; j++)
yading@10:             if (ff_vorbis_floor1_inverse_db_table[j * fc->multiplier] > average)
yading@10:                 break;
yading@10:         posts[fc->list[i].sort] = j;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static int render_point(int x0, int y0, int x1, int y1, int x)
yading@10: {
yading@10:     return y0 +  (x - x0) * (y1 - y0) / (x1 - x0);
yading@10: }
yading@10: 
yading@10: static int floor_encode(vorbis_enc_context *venc, vorbis_enc_floor *fc,
yading@10:                         PutBitContext *pb, uint16_t *posts,
yading@10:                         float *floor, int samples)
yading@10: {
yading@10:     int range = 255 / fc->multiplier + 1;
yading@10:     int coded[MAX_FLOOR_VALUES]; // first 2 values are unused
yading@10:     int i, counter;
yading@10: 
yading@10:     if (pb->size_in_bits - put_bits_count(pb) < 1 + 2 * ilog(range - 1))
yading@10:         return AVERROR(EINVAL);
yading@10:     put_bits(pb, 1, 1); // non zero
yading@10:     put_bits(pb, ilog(range - 1), posts[0]);
yading@10:     put_bits(pb, ilog(range - 1), posts[1]);
yading@10:     coded[0] = coded[1] = 1;
yading@10: 
yading@10:     for (i = 2; i < fc->values; i++) {
yading@10:         int predicted = render_point(fc->list[fc->list[i].low].x,
yading@10:                                      posts[fc->list[i].low],
yading@10:                                      fc->list[fc->list[i].high].x,
yading@10:                                      posts[fc->list[i].high],
yading@10:                                      fc->list[i].x);
yading@10:         int highroom = range - predicted;
yading@10:         int lowroom = predicted;
yading@10:         int room = FFMIN(highroom, lowroom);
yading@10:         if (predicted == posts[i]) {
yading@10:             coded[i] = 0; // must be used later as flag!
yading@10:             continue;
yading@10:         } else {
yading@10:             if (!coded[fc->list[i].low ])
yading@10:                 coded[fc->list[i].low ] = -1;
yading@10:             if (!coded[fc->list[i].high])
yading@10:                 coded[fc->list[i].high] = -1;
yading@10:         }
yading@10:         if (posts[i] > predicted) {
yading@10:             if (posts[i] - predicted > room)
yading@10:                 coded[i] = posts[i] - predicted + lowroom;
yading@10:             else
yading@10:                 coded[i] = (posts[i] - predicted) << 1;
yading@10:         } else {
yading@10:             if (predicted - posts[i] > room)
yading@10:                 coded[i] = predicted - posts[i] + highroom - 1;
yading@10:             else
yading@10:                 coded[i] = ((predicted - posts[i]) << 1) - 1;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     counter = 2;
yading@10:     for (i = 0; i < fc->partitions; i++) {
yading@10:         vorbis_enc_floor_class * c = &fc->classes[fc->partition_to_class[i]];
yading@10:         int k, cval = 0, csub = 1<<c->subclass;
yading@10:         if (c->subclass) {
yading@10:             vorbis_enc_codebook * book = &venc->codebooks[c->masterbook];
yading@10:             int cshift = 0;
yading@10:             for (k = 0; k < c->dim; k++) {
yading@10:                 int l;
yading@10:                 for (l = 0; l < csub; l++) {
yading@10:                     int maxval = 1;
yading@10:                     if (c->books[l] != -1)
yading@10:                         maxval = venc->codebooks[c->books[l]].nentries;
yading@10:                     // coded could be -1, but this still works, cause that is 0
yading@10:                     if (coded[counter + k] < maxval)
yading@10:                         break;
yading@10:                 }
yading@10:                 assert(l != csub);
yading@10:                 cval   |= l << cshift;
yading@10:                 cshift += c->subclass;
yading@10:             }
yading@10:             if (put_codeword(pb, book, cval))
yading@10:                 return AVERROR(EINVAL);
yading@10:         }
yading@10:         for (k = 0; k < c->dim; k++) {
yading@10:             int book  = c->books[cval & (csub-1)];
yading@10:             int entry = coded[counter++];
yading@10:             cval >>= c->subclass;
yading@10:             if (book == -1)
yading@10:                 continue;
yading@10:             if (entry == -1)
yading@10:                 entry = 0;
yading@10:             if (put_codeword(pb, &venc->codebooks[book], entry))
yading@10:                 return AVERROR(EINVAL);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     ff_vorbis_floor1_render_list(fc->list, fc->values, posts, coded,
yading@10:                                  fc->multiplier, floor, samples);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static float *put_vector(vorbis_enc_codebook *book, PutBitContext *pb,
yading@10:                          float *num)
yading@10: {
yading@10:     int i, entry = -1;
yading@10:     float distance = FLT_MAX;
yading@10:     assert(book->dimensions);
yading@10:     for (i = 0; i < book->nentries; i++) {
yading@10:         float * vec = book->dimensions + i * book->ndimensions, d = book->pow2[i];
yading@10:         int j;
yading@10:         if (!book->lens[i])
yading@10:             continue;
yading@10:         for (j = 0; j < book->ndimensions; j++)
yading@10:             d -= vec[j] * num[j];
yading@10:         if (distance > d) {
yading@10:             entry    = i;
yading@10:             distance = d;
yading@10:         }
yading@10:     }
yading@10:     if (put_codeword(pb, book, entry))
yading@10:         return NULL;
yading@10:     return &book->dimensions[entry * book->ndimensions];
yading@10: }
yading@10: 
yading@10: static int residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
yading@10:                           PutBitContext *pb, float *coeffs, int samples,
yading@10:                           int real_ch)
yading@10: {
yading@10:     int pass, i, j, p, k;
yading@10:     int psize      = rc->partition_size;
yading@10:     int partitions = (rc->end - rc->begin) / psize;
yading@10:     int channels   = (rc->type == 2) ? 1 : real_ch;
yading@10:     int classes[MAX_CHANNELS][NUM_RESIDUE_PARTITIONS];
yading@10:     int classwords = venc->codebooks[rc->classbook].ndimensions;
yading@10: 
yading@10:     assert(rc->type == 2);
yading@10:     assert(real_ch == 2);
yading@10:     for (p = 0; p < partitions; p++) {
yading@10:         float max1 = 0., max2 = 0.;
yading@10:         int s = rc->begin + p * psize;
yading@10:         for (k = s; k < s + psize; k += 2) {
yading@10:             max1 = FFMAX(max1, fabs(coeffs[          k / real_ch]));
yading@10:             max2 = FFMAX(max2, fabs(coeffs[samples + k / real_ch]));
yading@10:         }
yading@10: 
yading@10:         for (i = 0; i < rc->classifications - 1; i++)
yading@10:             if (max1 < rc->maxes[i][0] && max2 < rc->maxes[i][1])
yading@10:                 break;
yading@10:         classes[0][p] = i;
yading@10:     }
yading@10: 
yading@10:     for (pass = 0; pass < 8; pass++) {
yading@10:         p = 0;
yading@10:         while (p < partitions) {
yading@10:             if (pass == 0)
yading@10:                 for (j = 0; j < channels; j++) {
yading@10:                     vorbis_enc_codebook * book = &venc->codebooks[rc->classbook];
yading@10:                     int entry = 0;
yading@10:                     for (i = 0; i < classwords; i++) {
yading@10:                         entry *= rc->classifications;
yading@10:                         entry += classes[j][p + i];
yading@10:                     }
yading@10:                     if (put_codeword(pb, book, entry))
yading@10:                         return AVERROR(EINVAL);
yading@10:                 }
yading@10:             for (i = 0; i < classwords && p < partitions; i++, p++) {
yading@10:                 for (j = 0; j < channels; j++) {
yading@10:                     int nbook = rc->books[classes[j][p]][pass];
yading@10:                     vorbis_enc_codebook * book = &venc->codebooks[nbook];
yading@10:                     float *buf = coeffs + samples*j + rc->begin + p*psize;
yading@10:                     if (nbook == -1)
yading@10:                         continue;
yading@10: 
yading@10:                     assert(rc->type == 0 || rc->type == 2);
yading@10:                     assert(!(psize % book->ndimensions));
yading@10: 
yading@10:                     if (rc->type == 0) {
yading@10:                         for (k = 0; k < psize; k += book->ndimensions) {
yading@10:                             int l;
yading@10:                             float *a = put_vector(book, pb, &buf[k]);
yading@10:                             if (!a)
yading@10:                                 return AVERROR(EINVAL);
yading@10:                             for (l = 0; l < book->ndimensions; l++)
yading@10:                                 buf[k + l] -= a[l];
yading@10:                         }
yading@10:                     } else {
yading@10:                         int s = rc->begin + p * psize, a1, b1;
yading@10:                         a1 = (s % real_ch) * samples;
yading@10:                         b1 =  s / real_ch;
yading@10:                         s  = real_ch * samples;
yading@10:                         for (k = 0; k < psize; k += book->ndimensions) {
yading@10:                             int dim, a2 = a1, b2 = b1;
yading@10:                             float vec[MAX_CODEBOOK_DIM], *pv = vec;
yading@10:                             for (dim = book->ndimensions; dim--; ) {
yading@10:                                 *pv++ = coeffs[a2 + b2];
yading@10:                                 if ((a2 += samples) == s) {
yading@10:                                     a2 = 0;
yading@10:                                     b2++;
yading@10:                                 }
yading@10:                             }
yading@10:                             pv = put_vector(book, pb, vec);
yading@10:                             if (!pv)
yading@10:                                 return AVERROR(EINVAL);
yading@10:                             for (dim = book->ndimensions; dim--; ) {
yading@10:                                 coeffs[a1 + b1] -= *pv++;
yading@10:                                 if ((a1 += samples) == s) {
yading@10:                                     a1 = 0;
yading@10:                                     b1++;
yading@10:                                 }
yading@10:                             }
yading@10:                         }
yading@10:                     }
yading@10:                 }
yading@10:             }
yading@10:         }
yading@10:     }
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int apply_window_and_mdct(vorbis_enc_context *venc,
yading@10:                                  float **audio, int samples)
yading@10: {
yading@10:     int i, channel;
yading@10:     const float * win = venc->win[0];
yading@10:     int window_len = 1 << (venc->log2_blocksize[0] - 1);
yading@10:     float n = (float)(1 << venc->log2_blocksize[0]) / 4.;
yading@10:     // FIXME use dsp
yading@10: 
yading@10:     if (!venc->have_saved && !samples)
yading@10:         return 0;
yading@10: 
yading@10:     if (venc->have_saved) {
yading@10:         for (channel = 0; channel < venc->channels; channel++)
yading@10:             memcpy(venc->samples + channel * window_len * 2,
yading@10:                    venc->saved + channel * window_len, sizeof(float) * window_len);
yading@10:     } else {
yading@10:         for (channel = 0; channel < venc->channels; channel++)
yading@10:             memset(venc->samples + channel * window_len * 2, 0,
yading@10:                    sizeof(float) * window_len);
yading@10:     }
yading@10: 
yading@10:     if (samples) {
yading@10:         for (channel = 0; channel < venc->channels; channel++) {
yading@10:             float * offset = venc->samples + channel*window_len*2 + window_len;
yading@10:             for (i = 0; i < samples; i++)
yading@10:                 offset[i] = audio[channel][i] / n * win[window_len - i - 1];
yading@10:         }
yading@10:     } else {
yading@10:         for (channel = 0; channel < venc->channels; channel++)
yading@10:             memset(venc->samples + channel * window_len * 2 + window_len,
yading@10:                    0, sizeof(float) * window_len);
yading@10:     }
yading@10: 
yading@10:     for (channel = 0; channel < venc->channels; channel++)
yading@10:         venc->mdct[0].mdct_calc(&venc->mdct[0], venc->coeffs + channel * window_len,
yading@10:                      venc->samples + channel * window_len * 2);
yading@10: 
yading@10:     if (samples) {
yading@10:         for (channel = 0; channel < venc->channels; channel++) {
yading@10:             float *offset = venc->saved + channel * window_len;
yading@10:             for (i = 0; i < samples; i++)
yading@10:                 offset[i] = audio[channel][i] / n * win[i];
yading@10:         }
yading@10:         venc->have_saved = 1;
yading@10:     } else {
yading@10:         venc->have_saved = 0;
yading@10:     }
yading@10:     return 1;
yading@10: }
yading@10: 
yading@10: static int vorbis_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
yading@10:                                const AVFrame *frame, int *got_packet_ptr)
yading@10: {
yading@10:     vorbis_enc_context *venc = avctx->priv_data;
yading@10:     float **audio = frame ? (float **)frame->extended_data : NULL;
yading@10:     int samples = frame ? frame->nb_samples : 0;
yading@10:     vorbis_enc_mode *mode;
yading@10:     vorbis_enc_mapping *mapping;
yading@10:     PutBitContext pb;
yading@10:     int i, ret;
yading@10: 
yading@10:     if (!apply_window_and_mdct(venc, audio, samples))
yading@10:         return 0;
yading@10:     samples = 1 << (venc->log2_blocksize[0] - 1);
yading@10: 
yading@10:     if ((ret = ff_alloc_packet2(avctx, avpkt, 8192)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     init_put_bits(&pb, avpkt->data, avpkt->size);
yading@10: 
yading@10:     if (pb.size_in_bits - put_bits_count(&pb) < 1 + ilog(venc->nmodes - 1)) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     put_bits(&pb, 1, 0); // magic bit
yading@10: 
yading@10:     put_bits(&pb, ilog(venc->nmodes - 1), 0); // 0 bits, the mode
yading@10: 
yading@10:     mode    = &venc->modes[0];
yading@10:     mapping = &venc->mappings[mode->mapping];
yading@10:     if (mode->blockflag) {
yading@10:         put_bits(&pb, 1, 0);
yading@10:         put_bits(&pb, 1, 0);
yading@10:     }
yading@10: 
yading@10:     for (i = 0; i < venc->channels; i++) {
yading@10:         vorbis_enc_floor *fc = &venc->floors[mapping->floor[mapping->mux[i]]];
yading@10:         uint16_t posts[MAX_FLOOR_VALUES];
yading@10:         floor_fit(venc, fc, &venc->coeffs[i * samples], posts, samples);
yading@10:         if (floor_encode(venc, fc, &pb, posts, &venc->floor[i * samples], samples)) {
yading@10:             av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n");
yading@10:             return AVERROR(EINVAL);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     for (i = 0; i < venc->channels * samples; i++)
yading@10:         venc->coeffs[i] /= venc->floor[i];
yading@10: 
yading@10:     for (i = 0; i < mapping->coupling_steps; i++) {
yading@10:         float *mag = venc->coeffs + mapping->magnitude[i] * samples;
yading@10:         float *ang = venc->coeffs + mapping->angle[i]     * samples;
yading@10:         int j;
yading@10:         for (j = 0; j < samples; j++) {
yading@10:             float a = ang[j];
yading@10:             ang[j] -= mag[j];
yading@10:             if (mag[j] > 0)
yading@10:                 ang[j] = -ang[j];
yading@10:             if (ang[j] < 0)
yading@10:                 mag[j] = a;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     if (residue_encode(venc, &venc->residues[mapping->residue[mapping->mux[0]]],
yading@10:                        &pb, venc->coeffs, samples, venc->channels)) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n");
yading@10:         return AVERROR(EINVAL);
yading@10:     }
yading@10: 
yading@10:     flush_put_bits(&pb);
yading@10:     avpkt->size = put_bits_count(&pb) >> 3;
yading@10: 
yading@10:     avpkt->duration = ff_samples_to_time_base(avctx, avctx->frame_size);
yading@10:     if (frame) {
yading@10:         if (frame->pts != AV_NOPTS_VALUE)
yading@10:             avpkt->pts = ff_samples_to_time_base(avctx, frame->pts);
yading@10:     } else
yading@10:         avpkt->pts = venc->next_pts;
yading@10:     if (avpkt->pts != AV_NOPTS_VALUE)
yading@10:         venc->next_pts = avpkt->pts + avpkt->duration;
yading@10: 
yading@10:     *got_packet_ptr = 1;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: 
yading@10: static av_cold int vorbis_encode_close(AVCodecContext *avctx)
yading@10: {
yading@10:     vorbis_enc_context *venc = avctx->priv_data;
yading@10:     int i;
yading@10: 
yading@10:     if (venc->codebooks)
yading@10:         for (i = 0; i < venc->ncodebooks; i++) {
yading@10:             av_freep(&venc->codebooks[i].lens);
yading@10:             av_freep(&venc->codebooks[i].codewords);
yading@10:             av_freep(&venc->codebooks[i].quantlist);
yading@10:             av_freep(&venc->codebooks[i].dimensions);
yading@10:             av_freep(&venc->codebooks[i].pow2);
yading@10:         }
yading@10:     av_freep(&venc->codebooks);
yading@10: 
yading@10:     if (venc->floors)
yading@10:         for (i = 0; i < venc->nfloors; i++) {
yading@10:             int j;
yading@10:             if (venc->floors[i].classes)
yading@10:                 for (j = 0; j < venc->floors[i].nclasses; j++)
yading@10:                     av_freep(&venc->floors[i].classes[j].books);
yading@10:             av_freep(&venc->floors[i].classes);
yading@10:             av_freep(&venc->floors[i].partition_to_class);
yading@10:             av_freep(&venc->floors[i].list);
yading@10:         }
yading@10:     av_freep(&venc->floors);
yading@10: 
yading@10:     if (venc->residues)
yading@10:         for (i = 0; i < venc->nresidues; i++) {
yading@10:             av_freep(&venc->residues[i].books);
yading@10:             av_freep(&venc->residues[i].maxes);
yading@10:         }
yading@10:     av_freep(&venc->residues);
yading@10: 
yading@10:     if (venc->mappings)
yading@10:         for (i = 0; i < venc->nmappings; i++) {
yading@10:             av_freep(&venc->mappings[i].mux);
yading@10:             av_freep(&venc->mappings[i].floor);
yading@10:             av_freep(&venc->mappings[i].residue);
yading@10:             av_freep(&venc->mappings[i].magnitude);
yading@10:             av_freep(&venc->mappings[i].angle);
yading@10:         }
yading@10:     av_freep(&venc->mappings);
yading@10: 
yading@10:     av_freep(&venc->modes);
yading@10: 
yading@10:     av_freep(&venc->saved);
yading@10:     av_freep(&venc->samples);
yading@10:     av_freep(&venc->floor);
yading@10:     av_freep(&venc->coeffs);
yading@10: 
yading@10:     ff_mdct_end(&venc->mdct[0]);
yading@10:     ff_mdct_end(&venc->mdct[1]);
yading@10: 
yading@10:     av_freep(&avctx->extradata);
yading@10: 
yading@10:     return 0 ;
yading@10: }
yading@10: 
yading@10: static av_cold int vorbis_encode_init(AVCodecContext *avctx)
yading@10: {
yading@10:     vorbis_enc_context *venc = avctx->priv_data;
yading@10:     int ret;
yading@10: 
yading@10:     if (avctx->channels != 2) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "Current FFmpeg Vorbis encoder only supports 2 channels.\n");
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10:     if ((ret = create_vorbis_context(venc, avctx)) < 0)
yading@10:         goto error;
yading@10: 
yading@10:     avctx->bit_rate = 0;
yading@10:     if (avctx->flags & CODEC_FLAG_QSCALE)
yading@10:         venc->quality = avctx->global_quality / (float)FF_QP2LAMBDA;
yading@10:     else
yading@10:         venc->quality = 8;
yading@10:     venc->quality *= venc->quality;
yading@10: 
yading@10:     if ((ret = put_main_header(venc, (uint8_t**)&avctx->extradata)) < 0)
yading@10:         goto error;
yading@10:     avctx->extradata_size = ret;
yading@10: 
yading@10:     avctx->frame_size = 1 << (venc->log2_blocksize[0] - 1);
yading@10: 
yading@10:     return 0;
yading@10: error:
yading@10:     vorbis_encode_close(avctx);
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: AVCodec ff_vorbis_encoder = {
yading@10:     .name           = "vorbis",
yading@10:     .type           = AVMEDIA_TYPE_AUDIO,
yading@10:     .id             = AV_CODEC_ID_VORBIS,
yading@10:     .priv_data_size = sizeof(vorbis_enc_context),
yading@10:     .init           = vorbis_encode_init,
yading@10:     .encode2        = vorbis_encode_frame,
yading@10:     .close          = vorbis_encode_close,
yading@10:     .capabilities   = CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
yading@10:     .sample_fmts    = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
yading@10:                                                      AV_SAMPLE_FMT_NONE },
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("Vorbis"),
yading@10: };