2 * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * Native Vorbis encoder.
24 * @author Oded Shimon <ods15@ods15.dyndns.org>
34 #include "vorbis_enc_data.h"
36 #define BITSTREAM_WRITER_LE
42 typedef struct vorbis_enc_codebook {
54 } vorbis_enc_codebook;
56 typedef struct vorbis_enc_floor_class {
61 } vorbis_enc_floor_class;
63 typedef struct vorbis_enc_floor {
65 int *partition_to_class;
67 vorbis_enc_floor_class *classes;
71 vorbis_floor1_entry *list;
74 typedef struct vorbis_enc_residue {
85 typedef struct vorbis_enc_mapping {
95 typedef struct vorbis_enc_mode {
100 typedef struct vorbis_enc_context {
103 int log2_blocksize[2];
109 float *floor; // also used for tmp values for mdct
110 float *coeffs; // also used for residue after floor
114 vorbis_enc_codebook *codebooks;
117 vorbis_enc_floor *floors;
120 vorbis_enc_residue *residues;
123 vorbis_enc_mapping *mappings;
126 vorbis_enc_mode *modes;
129 } vorbis_enc_context;
131 #define MAX_CHANNELS 2
132 #define MAX_CODEBOOK_DIM 8
134 #define MAX_FLOOR_CLASS_DIM 4
135 #define NUM_FLOOR_PARTITIONS 8
136 #define MAX_FLOOR_VALUES (MAX_FLOOR_CLASS_DIM*NUM_FLOOR_PARTITIONS+2)
138 #define RESIDUE_SIZE 1600
139 #define RESIDUE_PART_SIZE 32
140 #define NUM_RESIDUE_PARTITIONS (RESIDUE_SIZE/RESIDUE_PART_SIZE)
142 static inline int put_codeword(PutBitContext *pb, vorbis_enc_codebook *cb,
146 assert(entry < cb->nentries);
147 assert(cb->lens[entry]);
148 if (pb->size_in_bits - put_bits_count(pb) < cb->lens[entry])
149 return AVERROR(EINVAL);
150 put_bits(pb, cb->lens[entry], cb->codewords[entry]);
154 static int cb_lookup_vals(int lookup, int dimensions, int entries)
157 return ff_vorbis_nth_root(entries, dimensions);
158 else if (lookup == 2)
159 return dimensions *entries;
163 static int ready_codebook(vorbis_enc_codebook *cb)
167 ff_vorbis_len2vlc(cb->lens, cb->codewords, cb->nentries);
170 cb->pow2 = cb->dimensions = NULL;
172 int vals = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
173 cb->dimensions = av_malloc(sizeof(float) * cb->nentries * cb->ndimensions);
174 cb->pow2 = av_mallocz(sizeof(float) * cb->nentries);
175 if (!cb->dimensions || !cb->pow2)
176 return AVERROR(ENOMEM);
177 for (i = 0; i < cb->nentries; i++) {
181 for (j = 0; j < cb->ndimensions; j++) {
184 off = (i / div) % vals; // lookup type 1
186 off = i * cb->ndimensions + j; // lookup type 2
188 cb->dimensions[i * cb->ndimensions + j] = last + cb->min + cb->quantlist[off] * cb->delta;
190 last = cb->dimensions[i * cb->ndimensions + j];
191 cb->pow2[i] += cb->dimensions[i * cb->ndimensions + j] * cb->dimensions[i * cb->ndimensions + j];
200 static int ready_residue(vorbis_enc_residue *rc, vorbis_enc_context *venc)
203 assert(rc->type == 2);
204 rc->maxes = av_mallocz(sizeof(float[2]) * rc->classifications);
206 return AVERROR(ENOMEM);
207 for (i = 0; i < rc->classifications; i++) {
209 vorbis_enc_codebook * cb;
210 for (j = 0; j < 8; j++)
211 if (rc->books[i][j] != -1)
215 cb = &venc->codebooks[rc->books[i][j]];
216 assert(cb->ndimensions >= 2);
219 for (j = 0; j < cb->nentries; j++) {
223 a = fabs(cb->dimensions[j * cb->ndimensions]);
224 if (a > rc->maxes[i][0])
226 a = fabs(cb->dimensions[j * cb->ndimensions + 1]);
227 if (a > rc->maxes[i][1])
232 for (i = 0; i < rc->classifications; i++) {
233 rc->maxes[i][0] += 0.8;
234 rc->maxes[i][1] += 0.8;
239 static int create_vorbis_context(vorbis_enc_context *venc,
240 AVCodecContext *avctx)
242 vorbis_enc_floor *fc;
243 vorbis_enc_residue *rc;
244 vorbis_enc_mapping *mc;
247 venc->channels = avctx->channels;
248 venc->sample_rate = avctx->sample_rate;
249 venc->log2_blocksize[0] = venc->log2_blocksize[1] = 11;
251 venc->ncodebooks = FF_ARRAY_ELEMS(cvectors);
252 venc->codebooks = av_malloc(sizeof(vorbis_enc_codebook) * venc->ncodebooks);
253 if (!venc->codebooks)
254 return AVERROR(ENOMEM);
256 // codebook 0..14 - floor1 book, values 0..255
257 // codebook 15 residue masterbook
258 // codebook 16..29 residue
259 for (book = 0; book < venc->ncodebooks; book++) {
260 vorbis_enc_codebook *cb = &venc->codebooks[book];
262 cb->ndimensions = cvectors[book].dim;
263 cb->nentries = cvectors[book].real_len;
264 cb->min = cvectors[book].min;
265 cb->delta = cvectors[book].delta;
266 cb->lookup = cvectors[book].lookup;
269 cb->lens = av_malloc(sizeof(uint8_t) * cb->nentries);
270 cb->codewords = av_malloc(sizeof(uint32_t) * cb->nentries);
271 if (!cb->lens || !cb->codewords)
272 return AVERROR(ENOMEM);
273 memcpy(cb->lens, cvectors[book].clens, cvectors[book].len);
274 memset(cb->lens + cvectors[book].len, 0, cb->nentries - cvectors[book].len);
277 vals = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
278 cb->quantlist = av_malloc(sizeof(int) * vals);
280 return AVERROR(ENOMEM);
281 for (i = 0; i < vals; i++)
282 cb->quantlist[i] = cvectors[book].quant[i];
284 cb->quantlist = NULL;
286 if ((ret = ready_codebook(cb)) < 0)
291 venc->floors = av_malloc(sizeof(vorbis_enc_floor) * venc->nfloors);
293 return AVERROR(ENOMEM);
296 fc = &venc->floors[0];
297 fc->partitions = NUM_FLOOR_PARTITIONS;
298 fc->partition_to_class = av_malloc(sizeof(int) * fc->partitions);
299 if (!fc->partition_to_class)
300 return AVERROR(ENOMEM);
302 for (i = 0; i < fc->partitions; i++) {
303 static const int a[] = {0, 1, 2, 2, 3, 3, 4, 4};
304 fc->partition_to_class[i] = a[i];
305 fc->nclasses = FFMAX(fc->nclasses, fc->partition_to_class[i]);
308 fc->classes = av_malloc(sizeof(vorbis_enc_floor_class) * fc->nclasses);
310 return AVERROR(ENOMEM);
311 for (i = 0; i < fc->nclasses; i++) {
312 vorbis_enc_floor_class * c = &fc->classes[i];
314 c->dim = floor_classes[i].dim;
315 c->subclass = floor_classes[i].subclass;
316 c->masterbook = floor_classes[i].masterbook;
317 books = (1 << c->subclass);
318 c->books = av_malloc(sizeof(int) * books);
320 return AVERROR(ENOMEM);
321 for (j = 0; j < books; j++)
322 c->books[j] = floor_classes[i].nbooks[j];
325 fc->rangebits = venc->log2_blocksize[0] - 1;
328 for (i = 0; i < fc->partitions; i++)
329 fc->values += fc->classes[fc->partition_to_class[i]].dim;
331 fc->list = av_malloc(sizeof(vorbis_floor1_entry) * fc->values);
333 return AVERROR(ENOMEM);
335 fc->list[1].x = 1 << fc->rangebits;
336 for (i = 2; i < fc->values; i++) {
337 static const int a[] = {
338 93, 23,372, 6, 46,186,750, 14, 33, 65,
339 130,260,556, 3, 10, 18, 28, 39, 55, 79,
340 111,158,220,312,464,650,850
342 fc->list[i].x = a[i - 2];
344 if (ff_vorbis_ready_floor1_list(avctx, fc->list, fc->values))
348 venc->residues = av_malloc(sizeof(vorbis_enc_residue) * venc->nresidues);
350 return AVERROR(ENOMEM);
353 rc = &venc->residues[0];
357 rc->partition_size = 32;
358 rc->classifications = 10;
360 rc->books = av_malloc(sizeof(*rc->books) * rc->classifications);
362 return AVERROR(ENOMEM);
364 static const int8_t a[10][8] = {
365 { -1, -1, -1, -1, -1, -1, -1, -1, },
366 { -1, -1, 16, -1, -1, -1, -1, -1, },
367 { -1, -1, 17, -1, -1, -1, -1, -1, },
368 { -1, -1, 18, -1, -1, -1, -1, -1, },
369 { -1, -1, 19, -1, -1, -1, -1, -1, },
370 { -1, -1, 20, -1, -1, -1, -1, -1, },
371 { -1, -1, 21, -1, -1, -1, -1, -1, },
372 { 22, 23, -1, -1, -1, -1, -1, -1, },
373 { 24, 25, -1, -1, -1, -1, -1, -1, },
374 { 26, 27, 28, -1, -1, -1, -1, -1, },
376 memcpy(rc->books, a, sizeof a);
378 if ((ret = ready_residue(rc, venc)) < 0)
382 venc->mappings = av_malloc(sizeof(vorbis_enc_mapping) * venc->nmappings);
384 return AVERROR(ENOMEM);
387 mc = &venc->mappings[0];
389 mc->mux = av_malloc(sizeof(int) * venc->channels);
391 return AVERROR(ENOMEM);
392 for (i = 0; i < venc->channels; i++)
394 mc->floor = av_malloc(sizeof(int) * mc->submaps);
395 mc->residue = av_malloc(sizeof(int) * mc->submaps);
396 if (!mc->floor || !mc->residue)
397 return AVERROR(ENOMEM);
398 for (i = 0; i < mc->submaps; i++) {
402 mc->coupling_steps = venc->channels == 2 ? 1 : 0;
403 mc->magnitude = av_malloc(sizeof(int) * mc->coupling_steps);
404 mc->angle = av_malloc(sizeof(int) * mc->coupling_steps);
405 if (!mc->magnitude || !mc->angle)
406 return AVERROR(ENOMEM);
407 if (mc->coupling_steps) {
408 mc->magnitude[0] = 0;
413 venc->modes = av_malloc(sizeof(vorbis_enc_mode) * venc->nmodes);
415 return AVERROR(ENOMEM);
418 venc->modes[0].blockflag = 0;
419 venc->modes[0].mapping = 0;
421 venc->have_saved = 0;
422 venc->saved = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2);
423 venc->samples = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]));
424 venc->floor = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2);
425 venc->coeffs = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2);
426 if (!venc->saved || !venc->samples || !venc->floor || !venc->coeffs)
427 return AVERROR(ENOMEM);
429 venc->win[0] = ff_vorbis_vwin[venc->log2_blocksize[0] - 6];
430 venc->win[1] = ff_vorbis_vwin[venc->log2_blocksize[1] - 6];
432 if ((ret = ff_mdct_init(&venc->mdct[0], venc->log2_blocksize[0], 0, 1.0)) < 0)
434 if ((ret = ff_mdct_init(&venc->mdct[1], venc->log2_blocksize[1], 0, 1.0)) < 0)
440 static void put_float(PutBitContext *pb, float f)
444 mant = (int)ldexp(frexp(f, &exp), 20);
450 res |= mant | (exp << 21);
454 static void put_codebook_header(PutBitContext *pb, vorbis_enc_codebook *cb)
459 put_bits(pb, 24, 0x564342); //magic
460 put_bits(pb, 16, cb->ndimensions);
461 put_bits(pb, 24, cb->nentries);
463 for (i = 1; i < cb->nentries; i++)
464 if (cb->lens[i] < cb->lens[i-1])
466 if (i == cb->nentries)
469 put_bits(pb, 1, ordered);
471 int len = cb->lens[0];
472 put_bits(pb, 5, len - 1);
474 while (i < cb->nentries) {
476 for (j = 0; j+i < cb->nentries; j++)
477 if (cb->lens[j+i] != len)
479 put_bits(pb, ilog(cb->nentries - i), j);
485 for (i = 0; i < cb->nentries; i++)
488 if (i != cb->nentries)
490 put_bits(pb, 1, sparse);
492 for (i = 0; i < cb->nentries; i++) {
494 put_bits(pb, 1, !!cb->lens[i]);
496 put_bits(pb, 5, cb->lens[i] - 1);
500 put_bits(pb, 4, cb->lookup);
502 int tmp = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
503 int bits = ilog(cb->quantlist[0]);
505 for (i = 1; i < tmp; i++)
506 bits = FFMAX(bits, ilog(cb->quantlist[i]));
508 put_float(pb, cb->min);
509 put_float(pb, cb->delta);
511 put_bits(pb, 4, bits - 1);
512 put_bits(pb, 1, cb->seq_p);
514 for (i = 0; i < tmp; i++)
515 put_bits(pb, bits, cb->quantlist[i]);
519 static void put_floor_header(PutBitContext *pb, vorbis_enc_floor *fc)
523 put_bits(pb, 16, 1); // type, only floor1 is supported
525 put_bits(pb, 5, fc->partitions);
527 for (i = 0; i < fc->partitions; i++)
528 put_bits(pb, 4, fc->partition_to_class[i]);
530 for (i = 0; i < fc->nclasses; i++) {
533 put_bits(pb, 3, fc->classes[i].dim - 1);
534 put_bits(pb, 2, fc->classes[i].subclass);
536 if (fc->classes[i].subclass)
537 put_bits(pb, 8, fc->classes[i].masterbook);
539 books = (1 << fc->classes[i].subclass);
541 for (j = 0; j < books; j++)
542 put_bits(pb, 8, fc->classes[i].books[j] + 1);
545 put_bits(pb, 2, fc->multiplier - 1);
546 put_bits(pb, 4, fc->rangebits);
548 for (i = 2; i < fc->values; i++)
549 put_bits(pb, fc->rangebits, fc->list[i].x);
552 static void put_residue_header(PutBitContext *pb, vorbis_enc_residue *rc)
556 put_bits(pb, 16, rc->type);
558 put_bits(pb, 24, rc->begin);
559 put_bits(pb, 24, rc->end);
560 put_bits(pb, 24, rc->partition_size - 1);
561 put_bits(pb, 6, rc->classifications - 1);
562 put_bits(pb, 8, rc->classbook);
564 for (i = 0; i < rc->classifications; i++) {
566 for (j = 0; j < 8; j++)
567 tmp |= (rc->books[i][j] != -1) << j;
569 put_bits(pb, 3, tmp & 7);
570 put_bits(pb, 1, tmp > 7);
573 put_bits(pb, 5, tmp >> 3);
576 for (i = 0; i < rc->classifications; i++) {
578 for (j = 0; j < 8; j++)
579 if (rc->books[i][j] != -1)
580 put_bits(pb, 8, rc->books[i][j]);
584 static int put_main_header(vorbis_enc_context *venc, uint8_t **out)
588 uint8_t buffer[50000] = {0}, *p = buffer;
589 int buffer_len = sizeof buffer;
592 // identification header
593 init_put_bits(&pb, p, buffer_len);
594 put_bits(&pb, 8, 1); //magic
595 for (i = 0; "vorbis"[i]; i++)
596 put_bits(&pb, 8, "vorbis"[i]);
597 put_bits32(&pb, 0); // version
598 put_bits(&pb, 8, venc->channels);
599 put_bits32(&pb, venc->sample_rate);
600 put_bits32(&pb, 0); // bitrate
601 put_bits32(&pb, 0); // bitrate
602 put_bits32(&pb, 0); // bitrate
603 put_bits(&pb, 4, venc->log2_blocksize[0]);
604 put_bits(&pb, 4, venc->log2_blocksize[1]);
605 put_bits(&pb, 1, 1); // framing
608 hlens[0] = put_bits_count(&pb) >> 3;
609 buffer_len -= hlens[0];
613 init_put_bits(&pb, p, buffer_len);
614 put_bits(&pb, 8, 3); //magic
615 for (i = 0; "vorbis"[i]; i++)
616 put_bits(&pb, 8, "vorbis"[i]);
617 put_bits32(&pb, 0); // vendor length TODO
618 put_bits32(&pb, 0); // amount of comments
619 put_bits(&pb, 1, 1); // framing
622 hlens[1] = put_bits_count(&pb) >> 3;
623 buffer_len -= hlens[1];
627 init_put_bits(&pb, p, buffer_len);
628 put_bits(&pb, 8, 5); //magic
629 for (i = 0; "vorbis"[i]; i++)
630 put_bits(&pb, 8, "vorbis"[i]);
633 put_bits(&pb, 8, venc->ncodebooks - 1);
634 for (i = 0; i < venc->ncodebooks; i++)
635 put_codebook_header(&pb, &venc->codebooks[i]);
637 // time domain, reserved, zero
639 put_bits(&pb, 16, 0);
642 put_bits(&pb, 6, venc->nfloors - 1);
643 for (i = 0; i < venc->nfloors; i++)
644 put_floor_header(&pb, &venc->floors[i]);
647 put_bits(&pb, 6, venc->nresidues - 1);
648 for (i = 0; i < venc->nresidues; i++)
649 put_residue_header(&pb, &venc->residues[i]);
652 put_bits(&pb, 6, venc->nmappings - 1);
653 for (i = 0; i < venc->nmappings; i++) {
654 vorbis_enc_mapping *mc = &venc->mappings[i];
656 put_bits(&pb, 16, 0); // mapping type
658 put_bits(&pb, 1, mc->submaps > 1);
660 put_bits(&pb, 4, mc->submaps - 1);
662 put_bits(&pb, 1, !!mc->coupling_steps);
663 if (mc->coupling_steps) {
664 put_bits(&pb, 8, mc->coupling_steps - 1);
665 for (j = 0; j < mc->coupling_steps; j++) {
666 put_bits(&pb, ilog(venc->channels - 1), mc->magnitude[j]);
667 put_bits(&pb, ilog(venc->channels - 1), mc->angle[j]);
671 put_bits(&pb, 2, 0); // reserved
674 for (j = 0; j < venc->channels; j++)
675 put_bits(&pb, 4, mc->mux[j]);
677 for (j = 0; j < mc->submaps; j++) {
678 put_bits(&pb, 8, 0); // reserved time configuration
679 put_bits(&pb, 8, mc->floor[j]);
680 put_bits(&pb, 8, mc->residue[j]);
685 put_bits(&pb, 6, venc->nmodes - 1);
686 for (i = 0; i < venc->nmodes; i++) {
687 put_bits(&pb, 1, venc->modes[i].blockflag);
688 put_bits(&pb, 16, 0); // reserved window type
689 put_bits(&pb, 16, 0); // reserved transform type
690 put_bits(&pb, 8, venc->modes[i].mapping);
693 put_bits(&pb, 1, 1); // framing
696 hlens[2] = put_bits_count(&pb) >> 3;
698 len = hlens[0] + hlens[1] + hlens[2];
699 p = *out = av_mallocz(64 + len + len/255);
701 return AVERROR(ENOMEM);
704 p += av_xiphlacing(p, hlens[0]);
705 p += av_xiphlacing(p, hlens[1]);
707 for (i = 0; i < 3; i++) {
708 memcpy(p, buffer + buffer_len, hlens[i]);
710 buffer_len += hlens[i];
716 static float get_floor_average(vorbis_enc_floor * fc, float *coeffs, int i)
718 int begin = fc->list[fc->list[FFMAX(i-1, 0)].sort].x;
719 int end = fc->list[fc->list[FFMIN(i+1, fc->values - 1)].sort].x;
723 for (j = begin; j < end; j++)
724 average += fabs(coeffs[j]);
725 return average / (end - begin);
728 static void floor_fit(vorbis_enc_context *venc, vorbis_enc_floor *fc,
729 float *coeffs, uint16_t *posts, int samples)
731 int range = 255 / fc->multiplier + 1;
733 float tot_average = 0.0;
734 float averages[MAX_FLOOR_VALUES];
735 for (i = 0; i < fc->values; i++) {
736 averages[i] = get_floor_average(fc, coeffs, i);
737 tot_average += averages[i];
739 tot_average /= fc->values;
740 tot_average /= venc->quality;
742 for (i = 0; i < fc->values; i++) {
743 int position = fc->list[fc->list[i].sort].x;
744 float average = averages[i];
747 average = sqrt(tot_average * average) * pow(1.25f, position*0.005f); // MAGIC!
748 for (j = 0; j < range - 1; j++)
749 if (ff_vorbis_floor1_inverse_db_table[j * fc->multiplier] > average)
751 posts[fc->list[i].sort] = j;
755 static int render_point(int x0, int y0, int x1, int y1, int x)
757 return y0 + (x - x0) * (y1 - y0) / (x1 - x0);
760 static int floor_encode(vorbis_enc_context *venc, vorbis_enc_floor *fc,
761 PutBitContext *pb, uint16_t *posts,
762 float *floor, int samples)
764 int range = 255 / fc->multiplier + 1;
765 int coded[MAX_FLOOR_VALUES]; // first 2 values are unused
768 if (pb->size_in_bits - put_bits_count(pb) < 1 + 2 * ilog(range - 1))
769 return AVERROR(EINVAL);
770 put_bits(pb, 1, 1); // non zero
771 put_bits(pb, ilog(range - 1), posts[0]);
772 put_bits(pb, ilog(range - 1), posts[1]);
773 coded[0] = coded[1] = 1;
775 for (i = 2; i < fc->values; i++) {
776 int predicted = render_point(fc->list[fc->list[i].low].x,
777 posts[fc->list[i].low],
778 fc->list[fc->list[i].high].x,
779 posts[fc->list[i].high],
781 int highroom = range - predicted;
782 int lowroom = predicted;
783 int room = FFMIN(highroom, lowroom);
784 if (predicted == posts[i]) {
785 coded[i] = 0; // must be used later as flag!
788 if (!coded[fc->list[i].low ])
789 coded[fc->list[i].low ] = -1;
790 if (!coded[fc->list[i].high])
791 coded[fc->list[i].high] = -1;
793 if (posts[i] > predicted) {
794 if (posts[i] - predicted > room)
795 coded[i] = posts[i] - predicted + lowroom;
797 coded[i] = (posts[i] - predicted) << 1;
799 if (predicted - posts[i] > room)
800 coded[i] = predicted - posts[i] + highroom - 1;
802 coded[i] = ((predicted - posts[i]) << 1) - 1;
807 for (i = 0; i < fc->partitions; i++) {
808 vorbis_enc_floor_class * c = &fc->classes[fc->partition_to_class[i]];
809 int k, cval = 0, csub = 1<<c->subclass;
811 vorbis_enc_codebook * book = &venc->codebooks[c->masterbook];
813 for (k = 0; k < c->dim; k++) {
815 for (l = 0; l < csub; l++) {
817 if (c->books[l] != -1)
818 maxval = venc->codebooks[c->books[l]].nentries;
819 // coded could be -1, but this still works, cause that is 0
820 if (coded[counter + k] < maxval)
825 cshift += c->subclass;
827 if (put_codeword(pb, book, cval))
828 return AVERROR(EINVAL);
830 for (k = 0; k < c->dim; k++) {
831 int book = c->books[cval & (csub-1)];
832 int entry = coded[counter++];
833 cval >>= c->subclass;
838 if (put_codeword(pb, &venc->codebooks[book], entry))
839 return AVERROR(EINVAL);
843 ff_vorbis_floor1_render_list(fc->list, fc->values, posts, coded,
844 fc->multiplier, floor, samples);
849 static float *put_vector(vorbis_enc_codebook *book, PutBitContext *pb,
853 float distance = FLT_MAX;
854 assert(book->dimensions);
855 for (i = 0; i < book->nentries; i++) {
856 float * vec = book->dimensions + i * book->ndimensions, d = book->pow2[i];
860 for (j = 0; j < book->ndimensions; j++)
861 d -= vec[j] * num[j];
867 if (put_codeword(pb, book, entry))
869 return &book->dimensions[entry * book->ndimensions];
872 static int residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
873 PutBitContext *pb, float *coeffs, int samples,
876 int pass, i, j, p, k;
877 int psize = rc->partition_size;
878 int partitions = (rc->end - rc->begin) / psize;
879 int channels = (rc->type == 2) ? 1 : real_ch;
880 int classes[MAX_CHANNELS][NUM_RESIDUE_PARTITIONS];
881 int classwords = venc->codebooks[rc->classbook].ndimensions;
883 assert(rc->type == 2);
884 assert(real_ch == 2);
885 for (p = 0; p < partitions; p++) {
886 float max1 = 0.0, max2 = 0.0;
887 int s = rc->begin + p * psize;
888 for (k = s; k < s + psize; k += 2) {
889 max1 = FFMAX(max1, fabs(coeffs[ k / real_ch]));
890 max2 = FFMAX(max2, fabs(coeffs[samples + k / real_ch]));
893 for (i = 0; i < rc->classifications - 1; i++)
894 if (max1 < rc->maxes[i][0] && max2 < rc->maxes[i][1])
899 for (pass = 0; pass < 8; pass++) {
901 while (p < partitions) {
903 for (j = 0; j < channels; j++) {
904 vorbis_enc_codebook * book = &venc->codebooks[rc->classbook];
906 for (i = 0; i < classwords; i++) {
907 entry *= rc->classifications;
908 entry += classes[j][p + i];
910 if (put_codeword(pb, book, entry))
911 return AVERROR(EINVAL);
913 for (i = 0; i < classwords && p < partitions; i++, p++) {
914 for (j = 0; j < channels; j++) {
915 int nbook = rc->books[classes[j][p]][pass];
916 vorbis_enc_codebook * book = &venc->codebooks[nbook];
917 float *buf = coeffs + samples*j + rc->begin + p*psize;
921 assert(rc->type == 0 || rc->type == 2);
922 assert(!(psize % book->ndimensions));
925 for (k = 0; k < psize; k += book->ndimensions) {
927 float *a = put_vector(book, pb, &buf[k]);
929 return AVERROR(EINVAL);
930 for (l = 0; l < book->ndimensions; l++)
934 int s = rc->begin + p * psize, a1, b1;
935 a1 = (s % real_ch) * samples;
937 s = real_ch * samples;
938 for (k = 0; k < psize; k += book->ndimensions) {
939 int dim, a2 = a1, b2 = b1;
940 float vec[MAX_CODEBOOK_DIM], *pv = vec;
941 for (dim = book->ndimensions; dim--; ) {
942 *pv++ = coeffs[a2 + b2];
943 if ((a2 += samples) == s) {
948 pv = put_vector(book, pb, vec);
950 return AVERROR(EINVAL);
951 for (dim = book->ndimensions; dim--; ) {
952 coeffs[a1 + b1] -= *pv++;
953 if ((a1 += samples) == s) {
967 static int apply_window_and_mdct(vorbis_enc_context *venc,
968 float **audio, int samples)
971 const float * win = venc->win[0];
972 int window_len = 1 << (venc->log2_blocksize[0] - 1);
973 float n = (float)(1 << venc->log2_blocksize[0]) / 4.0;
976 if (!venc->have_saved && !samples)
979 if (venc->have_saved) {
980 for (channel = 0; channel < venc->channels; channel++)
981 memcpy(venc->samples + channel * window_len * 2,
982 venc->saved + channel * window_len, sizeof(float) * window_len);
984 for (channel = 0; channel < venc->channels; channel++)
985 memset(venc->samples + channel * window_len * 2, 0,
986 sizeof(float) * window_len);
990 for (channel = 0; channel < venc->channels; channel++) {
991 float * offset = venc->samples + channel*window_len*2 + window_len;
992 for (i = 0; i < samples; i++)
993 offset[i] = audio[channel][i] / n * win[window_len - i - 1];
996 for (channel = 0; channel < venc->channels; channel++)
997 memset(venc->samples + channel * window_len * 2 + window_len,
998 0, sizeof(float) * window_len);
1001 for (channel = 0; channel < venc->channels; channel++)
1002 venc->mdct[0].mdct_calc(&venc->mdct[0], venc->coeffs + channel * window_len,
1003 venc->samples + channel * window_len * 2);
1006 for (channel = 0; channel < venc->channels; channel++) {
1007 float *offset = venc->saved + channel * window_len;
1008 for (i = 0; i < samples; i++)
1009 offset[i] = audio[channel][i] / n * win[i];
1011 venc->have_saved = 1;
1013 venc->have_saved = 0;
1019 static int vorbis_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
1020 const AVFrame *frame, int *got_packet_ptr)
1022 vorbis_enc_context *venc = avctx->priv_data;
1023 float **audio = frame ? (float **)frame->extended_data : NULL;
1024 int samples = frame ? frame->nb_samples : 0;
1025 vorbis_enc_mode *mode;
1026 vorbis_enc_mapping *mapping;
1030 if (!apply_window_and_mdct(venc, audio, samples))
1032 samples = 1 << (venc->log2_blocksize[0] - 1);
1034 if ((ret = ff_alloc_packet(avpkt, 8192))) {
1035 av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
1039 init_put_bits(&pb, avpkt->data, avpkt->size);
1041 if (pb.size_in_bits - put_bits_count(&pb) < 1 + ilog(venc->nmodes - 1)) {
1042 av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n");
1043 return AVERROR(EINVAL);
1046 put_bits(&pb, 1, 0); // magic bit
1048 put_bits(&pb, ilog(venc->nmodes - 1), 0); // 0 bits, the mode
1050 mode = &venc->modes[0];
1051 mapping = &venc->mappings[mode->mapping];
1052 if (mode->blockflag) {
1053 put_bits(&pb, 1, 0);
1054 put_bits(&pb, 1, 0);
1057 for (i = 0; i < venc->channels; i++) {
1058 vorbis_enc_floor *fc = &venc->floors[mapping->floor[mapping->mux[i]]];
1059 uint16_t posts[MAX_FLOOR_VALUES];
1060 floor_fit(venc, fc, &venc->coeffs[i * samples], posts, samples);
1061 if (floor_encode(venc, fc, &pb, posts, &venc->floor[i * samples], samples)) {
1062 av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n");
1063 return AVERROR(EINVAL);
1067 for (i = 0; i < venc->channels * samples; i++)
1068 venc->coeffs[i] /= venc->floor[i];
1070 for (i = 0; i < mapping->coupling_steps; i++) {
1071 float *mag = venc->coeffs + mapping->magnitude[i] * samples;
1072 float *ang = venc->coeffs + mapping->angle[i] * samples;
1074 for (j = 0; j < samples; j++) {
1084 if (residue_encode(venc, &venc->residues[mapping->residue[mapping->mux[0]]],
1085 &pb, venc->coeffs, samples, venc->channels)) {
1086 av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n");
1087 return AVERROR(EINVAL);
1090 flush_put_bits(&pb);
1091 avpkt->size = put_bits_count(&pb) >> 3;
1093 avpkt->duration = ff_samples_to_time_base(avctx, avctx->frame_size);
1095 if (frame->pts != AV_NOPTS_VALUE)
1096 avpkt->pts = ff_samples_to_time_base(avctx, frame->pts);
1098 avpkt->pts = venc->next_pts;
1100 if (avpkt->pts != AV_NOPTS_VALUE)
1101 venc->next_pts = avpkt->pts + avpkt->duration;
1103 *got_packet_ptr = 1;
1108 static av_cold int vorbis_encode_close(AVCodecContext *avctx)
1110 vorbis_enc_context *venc = avctx->priv_data;
1113 if (venc->codebooks)
1114 for (i = 0; i < venc->ncodebooks; i++) {
1115 av_freep(&venc->codebooks[i].lens);
1116 av_freep(&venc->codebooks[i].codewords);
1117 av_freep(&venc->codebooks[i].quantlist);
1118 av_freep(&venc->codebooks[i].dimensions);
1119 av_freep(&venc->codebooks[i].pow2);
1121 av_freep(&venc->codebooks);
1124 for (i = 0; i < venc->nfloors; i++) {
1126 if (venc->floors[i].classes)
1127 for (j = 0; j < venc->floors[i].nclasses; j++)
1128 av_freep(&venc->floors[i].classes[j].books);
1129 av_freep(&venc->floors[i].classes);
1130 av_freep(&venc->floors[i].partition_to_class);
1131 av_freep(&venc->floors[i].list);
1133 av_freep(&venc->floors);
1136 for (i = 0; i < venc->nresidues; i++) {
1137 av_freep(&venc->residues[i].books);
1138 av_freep(&venc->residues[i].maxes);
1140 av_freep(&venc->residues);
1143 for (i = 0; i < venc->nmappings; i++) {
1144 av_freep(&venc->mappings[i].mux);
1145 av_freep(&venc->mappings[i].floor);
1146 av_freep(&venc->mappings[i].residue);
1147 av_freep(&venc->mappings[i].magnitude);
1148 av_freep(&venc->mappings[i].angle);
1150 av_freep(&venc->mappings);
1152 av_freep(&venc->modes);
1154 av_freep(&venc->saved);
1155 av_freep(&venc->samples);
1156 av_freep(&venc->floor);
1157 av_freep(&venc->coeffs);
1159 ff_mdct_end(&venc->mdct[0]);
1160 ff_mdct_end(&venc->mdct[1]);
1162 av_freep(&avctx->extradata);
1167 static av_cold int vorbis_encode_init(AVCodecContext *avctx)
1169 vorbis_enc_context *venc = avctx->priv_data;
1172 if (avctx->channels != 2) {
1173 av_log(avctx, AV_LOG_ERROR, "Current Libav Vorbis encoder only supports 2 channels.\n");
1177 if ((ret = create_vorbis_context(venc, avctx)) < 0)
1180 avctx->bit_rate = 0;
1181 if (avctx->flags & AV_CODEC_FLAG_QSCALE)
1182 venc->quality = avctx->global_quality / (float)FF_QP2LAMBDA;
1184 venc->quality = 3.0;
1185 venc->quality *= venc->quality;
1187 if ((ret = put_main_header(venc, (uint8_t**)&avctx->extradata)) < 0)
1189 avctx->extradata_size = ret;
1191 avctx->frame_size = 1 << (venc->log2_blocksize[0] - 1);
1195 vorbis_encode_close(avctx);
1199 AVCodec ff_vorbis_encoder = {
1201 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1202 .type = AVMEDIA_TYPE_AUDIO,
1203 .id = AV_CODEC_ID_VORBIS,
1204 .priv_data_size = sizeof(vorbis_enc_context),
1205 .init = vorbis_encode_init,
1206 .encode2 = vorbis_encode_frame,
1207 .close = vorbis_encode_close,
1208 .capabilities = CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
1209 .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
1210 AV_SAMPLE_FMT_NONE },