1 /*
2 * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg 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.
10 *
11 * FFmpeg 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.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * Native Vorbis encoder.
24 * @author Oded Shimon <ods15@ods15.dyndns.org>
25 */
26
27 #include <float.h>
28 #include "libavutil/float_dsp.h"
29
30 #include "avcodec.h"
31 #include "internal.h"
32 #include "fft.h"
33 #include "mathops.h"
34 #include "vorbis.h"
35 #include "vorbis_enc_data.h"
36
37 #include "audio_frame_queue.h"
38 #include "libavfilter/bufferqueue.h"
39
40 #define BITSTREAM_WRITER_LE
41 #include "put_bits.h"
42
43 #undef NDEBUG
44 #include <assert.h>
45
46 typedef struct vorbis_enc_codebook {
47 int nentries;
48 uint8_t *lens;
49 uint32_t *codewords;
50 int ndimensions;
51 float min;
52 float delta;
53 int seq_p;
54 int lookup;
55 int *quantlist;
56 float *dimensions;
57 float *pow2;
58 } vorbis_enc_codebook;
59
60 typedef struct vorbis_enc_floor_class {
61 int dim;
62 int subclass;
63 int masterbook;
64 int *books;
65 } vorbis_enc_floor_class;
66
67 typedef struct vorbis_enc_floor {
68 int partitions;
69 int *partition_to_class;
70 int nclasses;
71 vorbis_enc_floor_class *classes;
72 int multiplier;
73 int rangebits;
74 int values;
75 vorbis_floor1_entry *list;
76 } vorbis_enc_floor;
77
78 typedef struct vorbis_enc_residue {
79 int type;
80 int begin;
81 int end;
82 int partition_size;
83 int classifications;
84 int classbook;
85 int8_t (*books)[8];
86 float (*maxes)[2];
87 } vorbis_enc_residue;
88
89 typedef struct vorbis_enc_mapping {
90 int submaps;
91 int *mux;
92 int *floor;
93 int *residue;
94 int coupling_steps;
95 int *magnitude;
96 int *angle;
97 } vorbis_enc_mapping;
98
99 typedef struct vorbis_enc_mode {
100 int blockflag;
101 int mapping;
102 } vorbis_enc_mode;
103
104 typedef struct vorbis_enc_context {
105 int channels;
106 int sample_rate;
107 int log2_blocksize[2];
108 FFTContext mdct[2];
109 const float *win[2];
110 int have_saved;
111 float *saved;
112 float *samples;
113 float *floor; // also used for tmp values for mdct
114 float *coeffs; // also used for residue after floor
115 float *scratch; // used for tmp values for psy model
116 float quality;
117
118 AudioFrameQueue afq;
119 struct FFBufQueue bufqueue;
120
121 int ncodebooks;
122 vorbis_enc_codebook *codebooks;
123
124 int nfloors;
125 vorbis_enc_floor *floors;
126
127 int nresidues;
128 vorbis_enc_residue *residues;
129
130 int nmappings;
131 vorbis_enc_mapping *mappings;
132
133 int nmodes;
134 vorbis_enc_mode *modes;
135
136 int64_t next_pts;
137
138 AVFloatDSPContext *fdsp;
139 } vorbis_enc_context;
140
141 #define MAX_CHANNELS 2
142 #define MAX_CODEBOOK_DIM 8
143
144 #define MAX_FLOOR_CLASS_DIM 4
145 #define NUM_FLOOR_PARTITIONS 8
146 #define MAX_FLOOR_VALUES (MAX_FLOOR_CLASS_DIM*NUM_FLOOR_PARTITIONS+2)
147
148 #define RESIDUE_SIZE 1600
149 #define RESIDUE_PART_SIZE 32
150 #define NUM_RESIDUE_PARTITIONS (RESIDUE_SIZE/RESIDUE_PART_SIZE)
151
put_codeword(PutBitContext * pb,vorbis_enc_codebook * cb,int entry)152 static inline int put_codeword(PutBitContext *pb, vorbis_enc_codebook *cb,
153 int entry)
154 {
155 av_assert2(entry >= 0);
156 av_assert2(entry < cb->nentries);
157 av_assert2(cb->lens[entry]);
158 if (pb->size_in_bits - put_bits_count(pb) < cb->lens[entry])
159 return AVERROR(EINVAL);
160 put_bits(pb, cb->lens[entry], cb->codewords[entry]);
161 return 0;
162 }
163
cb_lookup_vals(int lookup,int dimensions,int entries)164 static int cb_lookup_vals(int lookup, int dimensions, int entries)
165 {
166 if (lookup == 1)
167 return ff_vorbis_nth_root(entries, dimensions);
168 else if (lookup == 2)
169 return dimensions *entries;
170 return 0;
171 }
172
ready_codebook(vorbis_enc_codebook * cb)173 static int ready_codebook(vorbis_enc_codebook *cb)
174 {
175 int i;
176
177 ff_vorbis_len2vlc(cb->lens, cb->codewords, cb->nentries);
178
179 if (!cb->lookup) {
180 cb->pow2 = cb->dimensions = NULL;
181 } else {
182 int vals = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
183 cb->dimensions = av_malloc_array(cb->nentries, sizeof(float) * cb->ndimensions);
184 cb->pow2 = av_mallocz_array(cb->nentries, sizeof(float));
185 if (!cb->dimensions || !cb->pow2)
186 return AVERROR(ENOMEM);
187 for (i = 0; i < cb->nentries; i++) {
188 float last = 0;
189 int j;
190 int div = 1;
191 for (j = 0; j < cb->ndimensions; j++) {
192 int off;
193 if (cb->lookup == 1)
194 off = (i / div) % vals; // lookup type 1
195 else
196 off = i * cb->ndimensions + j; // lookup type 2
197
198 cb->dimensions[i * cb->ndimensions + j] = last + cb->min + cb->quantlist[off] * cb->delta;
199 if (cb->seq_p)
200 last = cb->dimensions[i * cb->ndimensions + j];
201 cb->pow2[i] += cb->dimensions[i * cb->ndimensions + j] * cb->dimensions[i * cb->ndimensions + j];
202 div *= vals;
203 }
204 cb->pow2[i] /= 2.0;
205 }
206 }
207 return 0;
208 }
209
ready_residue(vorbis_enc_residue * rc,vorbis_enc_context * venc)210 static int ready_residue(vorbis_enc_residue *rc, vorbis_enc_context *venc)
211 {
212 int i;
213 av_assert0(rc->type == 2);
214 rc->maxes = av_mallocz_array(rc->classifications, sizeof(float[2]));
215 if (!rc->maxes)
216 return AVERROR(ENOMEM);
217 for (i = 0; i < rc->classifications; i++) {
218 int j;
219 vorbis_enc_codebook * cb;
220 for (j = 0; j < 8; j++)
221 if (rc->books[i][j] != -1)
222 break;
223 if (j == 8) // zero
224 continue;
225 cb = &venc->codebooks[rc->books[i][j]];
226 assert(cb->ndimensions >= 2);
227 assert(cb->lookup);
228
229 for (j = 0; j < cb->nentries; j++) {
230 float a;
231 if (!cb->lens[j])
232 continue;
233 a = fabs(cb->dimensions[j * cb->ndimensions]);
234 if (a > rc->maxes[i][0])
235 rc->maxes[i][0] = a;
236 a = fabs(cb->dimensions[j * cb->ndimensions + 1]);
237 if (a > rc->maxes[i][1])
238 rc->maxes[i][1] = a;
239 }
240 }
241 // small bias
242 for (i = 0; i < rc->classifications; i++) {
243 rc->maxes[i][0] += 0.8;
244 rc->maxes[i][1] += 0.8;
245 }
246 return 0;
247 }
248
dsp_init(AVCodecContext * avctx,vorbis_enc_context * venc)249 static av_cold int dsp_init(AVCodecContext *avctx, vorbis_enc_context *venc)
250 {
251 int ret = 0;
252
253 venc->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
254 if (!venc->fdsp)
255 return AVERROR(ENOMEM);
256
257 // init windows
258 venc->win[0] = ff_vorbis_vwin[venc->log2_blocksize[0] - 6];
259 venc->win[1] = ff_vorbis_vwin[venc->log2_blocksize[1] - 6];
260
261 if ((ret = ff_mdct_init(&venc->mdct[0], venc->log2_blocksize[0], 0, 1.0)) < 0)
262 return ret;
263 if ((ret = ff_mdct_init(&venc->mdct[1], venc->log2_blocksize[1], 0, 1.0)) < 0)
264 return ret;
265
266 return 0;
267 }
268
create_vorbis_context(vorbis_enc_context * venc,AVCodecContext * avctx)269 static int create_vorbis_context(vorbis_enc_context *venc,
270 AVCodecContext *avctx)
271 {
272 vorbis_enc_floor *fc;
273 vorbis_enc_residue *rc;
274 vorbis_enc_mapping *mc;
275 int i, book, ret;
276
277 venc->channels = avctx->channels;
278 venc->sample_rate = avctx->sample_rate;
279 venc->log2_blocksize[0] = venc->log2_blocksize[1] = 11;
280
281 venc->ncodebooks = FF_ARRAY_ELEMS(cvectors);
282 venc->codebooks = av_malloc(sizeof(vorbis_enc_codebook) * venc->ncodebooks);
283 if (!venc->codebooks)
284 return AVERROR(ENOMEM);
285
286 // codebook 0..14 - floor1 book, values 0..255
287 // codebook 15 residue masterbook
288 // codebook 16..29 residue
289 for (book = 0; book < venc->ncodebooks; book++) {
290 vorbis_enc_codebook *cb = &venc->codebooks[book];
291 int vals;
292 cb->ndimensions = cvectors[book].dim;
293 cb->nentries = cvectors[book].real_len;
294 cb->min = cvectors[book].min;
295 cb->delta = cvectors[book].delta;
296 cb->lookup = cvectors[book].lookup;
297 cb->seq_p = 0;
298
299 cb->lens = av_malloc_array(cb->nentries, sizeof(uint8_t));
300 cb->codewords = av_malloc_array(cb->nentries, sizeof(uint32_t));
301 if (!cb->lens || !cb->codewords)
302 return AVERROR(ENOMEM);
303 memcpy(cb->lens, cvectors[book].clens, cvectors[book].len);
304 memset(cb->lens + cvectors[book].len, 0, cb->nentries - cvectors[book].len);
305
306 if (cb->lookup) {
307 vals = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
308 cb->quantlist = av_malloc_array(vals, sizeof(int));
309 if (!cb->quantlist)
310 return AVERROR(ENOMEM);
311 for (i = 0; i < vals; i++)
312 cb->quantlist[i] = cvectors[book].quant[i];
313 } else {
314 cb->quantlist = NULL;
315 }
316 if ((ret = ready_codebook(cb)) < 0)
317 return ret;
318 }
319
320 venc->nfloors = 1;
321 venc->floors = av_malloc(sizeof(vorbis_enc_floor) * venc->nfloors);
322 if (!venc->floors)
323 return AVERROR(ENOMEM);
324
325 // just 1 floor
326 fc = &venc->floors[0];
327 fc->partitions = NUM_FLOOR_PARTITIONS;
328 fc->partition_to_class = av_malloc(sizeof(int) * fc->partitions);
329 if (!fc->partition_to_class)
330 return AVERROR(ENOMEM);
331 fc->nclasses = 0;
332 for (i = 0; i < fc->partitions; i++) {
333 static const int a[] = {0, 1, 2, 2, 3, 3, 4, 4};
334 fc->partition_to_class[i] = a[i];
335 fc->nclasses = FFMAX(fc->nclasses, fc->partition_to_class[i]);
336 }
337 fc->nclasses++;
338 fc->classes = av_malloc_array(fc->nclasses, sizeof(vorbis_enc_floor_class));
339 if (!fc->classes)
340 return AVERROR(ENOMEM);
341 for (i = 0; i < fc->nclasses; i++) {
342 vorbis_enc_floor_class * c = &fc->classes[i];
343 int j, books;
344 c->dim = floor_classes[i].dim;
345 c->subclass = floor_classes[i].subclass;
346 c->masterbook = floor_classes[i].masterbook;
347 books = (1 << c->subclass);
348 c->books = av_malloc_array(books, sizeof(int));
349 if (!c->books)
350 return AVERROR(ENOMEM);
351 for (j = 0; j < books; j++)
352 c->books[j] = floor_classes[i].nbooks[j];
353 }
354 fc->multiplier = 2;
355 fc->rangebits = venc->log2_blocksize[1] - 1;
356
357 fc->values = 2;
358 for (i = 0; i < fc->partitions; i++)
359 fc->values += fc->classes[fc->partition_to_class[i]].dim;
360
361 fc->list = av_malloc_array(fc->values, sizeof(vorbis_floor1_entry));
362 if (!fc->list)
363 return AVERROR(ENOMEM);
364 fc->list[0].x = 0;
365 fc->list[1].x = 1 << fc->rangebits;
366 for (i = 2; i < fc->values; i++) {
367 static const int a[] = {
368 93, 23,372, 6, 46,186,750, 14, 33, 65,
369 130,260,556, 3, 10, 18, 28, 39, 55, 79,
370 111,158,220,312,464,650,850
371 };
372 fc->list[i].x = a[i - 2];
373 }
374 if (ff_vorbis_ready_floor1_list(avctx, fc->list, fc->values))
375 return AVERROR_BUG;
376
377 venc->nresidues = 1;
378 venc->residues = av_malloc(sizeof(vorbis_enc_residue) * venc->nresidues);
379 if (!venc->residues)
380 return AVERROR(ENOMEM);
381
382 // single residue
383 rc = &venc->residues[0];
384 rc->type = 2;
385 rc->begin = 0;
386 rc->end = 1600;
387 rc->partition_size = 32;
388 rc->classifications = 10;
389 rc->classbook = 15;
390 rc->books = av_malloc(sizeof(*rc->books) * rc->classifications);
391 if (!rc->books)
392 return AVERROR(ENOMEM);
393 {
394 static const int8_t a[10][8] = {
395 { -1, -1, -1, -1, -1, -1, -1, -1, },
396 { -1, -1, 16, -1, -1, -1, -1, -1, },
397 { -1, -1, 17, -1, -1, -1, -1, -1, },
398 { -1, -1, 18, -1, -1, -1, -1, -1, },
399 { -1, -1, 19, -1, -1, -1, -1, -1, },
400 { -1, -1, 20, -1, -1, -1, -1, -1, },
401 { -1, -1, 21, -1, -1, -1, -1, -1, },
402 { 22, 23, -1, -1, -1, -1, -1, -1, },
403 { 24, 25, -1, -1, -1, -1, -1, -1, },
404 { 26, 27, 28, -1, -1, -1, -1, -1, },
405 };
406 memcpy(rc->books, a, sizeof a);
407 }
408 if ((ret = ready_residue(rc, venc)) < 0)
409 return ret;
410
411 venc->nmappings = 1;
412 venc->mappings = av_malloc(sizeof(vorbis_enc_mapping) * venc->nmappings);
413 if (!venc->mappings)
414 return AVERROR(ENOMEM);
415
416 // single mapping
417 mc = &venc->mappings[0];
418 mc->submaps = 1;
419 mc->mux = av_malloc(sizeof(int) * venc->channels);
420 if (!mc->mux)
421 return AVERROR(ENOMEM);
422 for (i = 0; i < venc->channels; i++)
423 mc->mux[i] = 0;
424 mc->floor = av_malloc(sizeof(int) * mc->submaps);
425 mc->residue = av_malloc(sizeof(int) * mc->submaps);
426 if (!mc->floor || !mc->residue)
427 return AVERROR(ENOMEM);
428 for (i = 0; i < mc->submaps; i++) {
429 mc->floor[i] = 0;
430 mc->residue[i] = 0;
431 }
432 mc->coupling_steps = venc->channels == 2 ? 1 : 0;
433 mc->magnitude = av_malloc(sizeof(int) * mc->coupling_steps);
434 mc->angle = av_malloc(sizeof(int) * mc->coupling_steps);
435 if (!mc->magnitude || !mc->angle)
436 return AVERROR(ENOMEM);
437 if (mc->coupling_steps) {
438 mc->magnitude[0] = 0;
439 mc->angle[0] = 1;
440 }
441
442 venc->nmodes = 2;
443 venc->modes = av_malloc(sizeof(vorbis_enc_mode) * venc->nmodes);
444 if (!venc->modes)
445 return AVERROR(ENOMEM);
446
447 // Short block
448 venc->modes[0].blockflag = 0;
449 venc->modes[0].mapping = 0;
450 // Long block
451 venc->modes[1].blockflag = 1;
452 venc->modes[1].mapping = 0;
453
454 venc->have_saved = 0;
455 venc->saved = av_malloc_array(sizeof(float) * venc->channels, (1 << venc->log2_blocksize[1]) / 2);
456 venc->samples = av_malloc_array(sizeof(float) * venc->channels, (1 << venc->log2_blocksize[1]));
457 venc->floor = av_malloc_array(sizeof(float) * venc->channels, (1 << venc->log2_blocksize[1]) / 2);
458 venc->coeffs = av_malloc_array(sizeof(float) * venc->channels, (1 << venc->log2_blocksize[1]) / 2);
459 venc->scratch = av_malloc_array(sizeof(float) * venc->channels, (1 << venc->log2_blocksize[1]));
460
461 if (!venc->saved || !venc->samples || !venc->floor || !venc->coeffs || !venc->scratch)
462 return AVERROR(ENOMEM);
463
464 if ((ret = dsp_init(avctx, venc)) < 0)
465 return ret;
466
467 return 0;
468 }
469
put_float(PutBitContext * pb,float f)470 static void put_float(PutBitContext *pb, float f)
471 {
472 int exp, mant;
473 uint32_t res = 0;
474 mant = (int)ldexp(frexp(f, &exp), 20);
475 exp += 788 - 20;
476 if (mant < 0) {
477 res |= (1U << 31);
478 mant = -mant;
479 }
480 res |= mant | (exp << 21);
481 put_bits32(pb, res);
482 }
483
put_codebook_header(PutBitContext * pb,vorbis_enc_codebook * cb)484 static void put_codebook_header(PutBitContext *pb, vorbis_enc_codebook *cb)
485 {
486 int i;
487 int ordered = 0;
488
489 put_bits(pb, 24, 0x564342); //magic
490 put_bits(pb, 16, cb->ndimensions);
491 put_bits(pb, 24, cb->nentries);
492
493 for (i = 1; i < cb->nentries; i++)
494 if (cb->lens[i] < cb->lens[i-1])
495 break;
496 if (i == cb->nentries)
497 ordered = 1;
498
499 put_bits(pb, 1, ordered);
500 if (ordered) {
501 int len = cb->lens[0];
502 put_bits(pb, 5, len - 1);
503 i = 0;
504 while (i < cb->nentries) {
505 int j;
506 for (j = 0; j+i < cb->nentries; j++)
507 if (cb->lens[j+i] != len)
508 break;
509 put_bits(pb, ilog(cb->nentries - i), j);
510 i += j;
511 len++;
512 }
513 } else {
514 int sparse = 0;
515 for (i = 0; i < cb->nentries; i++)
516 if (!cb->lens[i])
517 break;
518 if (i != cb->nentries)
519 sparse = 1;
520 put_bits(pb, 1, sparse);
521
522 for (i = 0; i < cb->nentries; i++) {
523 if (sparse)
524 put_bits(pb, 1, !!cb->lens[i]);
525 if (cb->lens[i])
526 put_bits(pb, 5, cb->lens[i] - 1);
527 }
528 }
529
530 put_bits(pb, 4, cb->lookup);
531 if (cb->lookup) {
532 int tmp = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries);
533 int bits = ilog(cb->quantlist[0]);
534
535 for (i = 1; i < tmp; i++)
536 bits = FFMAX(bits, ilog(cb->quantlist[i]));
537
538 put_float(pb, cb->min);
539 put_float(pb, cb->delta);
540
541 put_bits(pb, 4, bits - 1);
542 put_bits(pb, 1, cb->seq_p);
543
544 for (i = 0; i < tmp; i++)
545 put_bits(pb, bits, cb->quantlist[i]);
546 }
547 }
548
put_floor_header(PutBitContext * pb,vorbis_enc_floor * fc)549 static void put_floor_header(PutBitContext *pb, vorbis_enc_floor *fc)
550 {
551 int i;
552
553 put_bits(pb, 16, 1); // type, only floor1 is supported
554
555 put_bits(pb, 5, fc->partitions);
556
557 for (i = 0; i < fc->partitions; i++)
558 put_bits(pb, 4, fc->partition_to_class[i]);
559
560 for (i = 0; i < fc->nclasses; i++) {
561 int j, books;
562
563 put_bits(pb, 3, fc->classes[i].dim - 1);
564 put_bits(pb, 2, fc->classes[i].subclass);
565
566 if (fc->classes[i].subclass)
567 put_bits(pb, 8, fc->classes[i].masterbook);
568
569 books = (1 << fc->classes[i].subclass);
570
571 for (j = 0; j < books; j++)
572 put_bits(pb, 8, fc->classes[i].books[j] + 1);
573 }
574
575 put_bits(pb, 2, fc->multiplier - 1);
576 put_bits(pb, 4, fc->rangebits);
577
578 for (i = 2; i < fc->values; i++)
579 put_bits(pb, fc->rangebits, fc->list[i].x);
580 }
581
put_residue_header(PutBitContext * pb,vorbis_enc_residue * rc)582 static void put_residue_header(PutBitContext *pb, vorbis_enc_residue *rc)
583 {
584 int i;
585
586 put_bits(pb, 16, rc->type);
587
588 put_bits(pb, 24, rc->begin);
589 put_bits(pb, 24, rc->end);
590 put_bits(pb, 24, rc->partition_size - 1);
591 put_bits(pb, 6, rc->classifications - 1);
592 put_bits(pb, 8, rc->classbook);
593
594 for (i = 0; i < rc->classifications; i++) {
595 int j, tmp = 0;
596 for (j = 0; j < 8; j++)
597 tmp |= (rc->books[i][j] != -1) << j;
598
599 put_bits(pb, 3, tmp & 7);
600 put_bits(pb, 1, tmp > 7);
601
602 if (tmp > 7)
603 put_bits(pb, 5, tmp >> 3);
604 }
605
606 for (i = 0; i < rc->classifications; i++) {
607 int j;
608 for (j = 0; j < 8; j++)
609 if (rc->books[i][j] != -1)
610 put_bits(pb, 8, rc->books[i][j]);
611 }
612 }
613
put_main_header(vorbis_enc_context * venc,uint8_t ** out)614 static int put_main_header(vorbis_enc_context *venc, uint8_t **out)
615 {
616 int i;
617 PutBitContext pb;
618 int len, hlens[3];
619 int buffer_len = 50000;
620 uint8_t *buffer = av_mallocz(buffer_len), *p = buffer;
621 if (!buffer)
622 return AVERROR(ENOMEM);
623
624 // identification header
625 init_put_bits(&pb, p, buffer_len);
626 put_bits(&pb, 8, 1); //magic
627 for (i = 0; "vorbis"[i]; i++)
628 put_bits(&pb, 8, "vorbis"[i]);
629 put_bits32(&pb, 0); // version
630 put_bits(&pb, 8, venc->channels);
631 put_bits32(&pb, venc->sample_rate);
632 put_bits32(&pb, 0); // bitrate
633 put_bits32(&pb, 0); // bitrate
634 put_bits32(&pb, 0); // bitrate
635 put_bits(&pb, 4, venc->log2_blocksize[0]);
636 put_bits(&pb, 4, venc->log2_blocksize[1]);
637 put_bits(&pb, 1, 1); // framing
638
639 flush_put_bits(&pb);
640 hlens[0] = put_bits_count(&pb) >> 3;
641 buffer_len -= hlens[0];
642 p += hlens[0];
643
644 // comment header
645 init_put_bits(&pb, p, buffer_len);
646 put_bits(&pb, 8, 3); //magic
647 for (i = 0; "vorbis"[i]; i++)
648 put_bits(&pb, 8, "vorbis"[i]);
649 put_bits32(&pb, 0); // vendor length TODO
650 put_bits32(&pb, 0); // amount of comments
651 put_bits(&pb, 1, 1); // framing
652
653 flush_put_bits(&pb);
654 hlens[1] = put_bits_count(&pb) >> 3;
655 buffer_len -= hlens[1];
656 p += hlens[1];
657
658 // setup header
659 init_put_bits(&pb, p, buffer_len);
660 put_bits(&pb, 8, 5); //magic
661 for (i = 0; "vorbis"[i]; i++)
662 put_bits(&pb, 8, "vorbis"[i]);
663
664 // codebooks
665 put_bits(&pb, 8, venc->ncodebooks - 1);
666 for (i = 0; i < venc->ncodebooks; i++)
667 put_codebook_header(&pb, &venc->codebooks[i]);
668
669 // time domain, reserved, zero
670 put_bits(&pb, 6, 0);
671 put_bits(&pb, 16, 0);
672
673 // floors
674 put_bits(&pb, 6, venc->nfloors - 1);
675 for (i = 0; i < venc->nfloors; i++)
676 put_floor_header(&pb, &venc->floors[i]);
677
678 // residues
679 put_bits(&pb, 6, venc->nresidues - 1);
680 for (i = 0; i < venc->nresidues; i++)
681 put_residue_header(&pb, &venc->residues[i]);
682
683 // mappings
684 put_bits(&pb, 6, venc->nmappings - 1);
685 for (i = 0; i < venc->nmappings; i++) {
686 vorbis_enc_mapping *mc = &venc->mappings[i];
687 int j;
688 put_bits(&pb, 16, 0); // mapping type
689
690 put_bits(&pb, 1, mc->submaps > 1);
691 if (mc->submaps > 1)
692 put_bits(&pb, 4, mc->submaps - 1);
693
694 put_bits(&pb, 1, !!mc->coupling_steps);
695 if (mc->coupling_steps) {
696 put_bits(&pb, 8, mc->coupling_steps - 1);
697 for (j = 0; j < mc->coupling_steps; j++) {
698 put_bits(&pb, ilog(venc->channels - 1), mc->magnitude[j]);
699 put_bits(&pb, ilog(venc->channels - 1), mc->angle[j]);
700 }
701 }
702
703 put_bits(&pb, 2, 0); // reserved
704
705 if (mc->submaps > 1)
706 for (j = 0; j < venc->channels; j++)
707 put_bits(&pb, 4, mc->mux[j]);
708
709 for (j = 0; j < mc->submaps; j++) {
710 put_bits(&pb, 8, 0); // reserved time configuration
711 put_bits(&pb, 8, mc->floor[j]);
712 put_bits(&pb, 8, mc->residue[j]);
713 }
714 }
715
716 // modes
717 put_bits(&pb, 6, venc->nmodes - 1);
718 for (i = 0; i < venc->nmodes; i++) {
719 put_bits(&pb, 1, venc->modes[i].blockflag);
720 put_bits(&pb, 16, 0); // reserved window type
721 put_bits(&pb, 16, 0); // reserved transform type
722 put_bits(&pb, 8, venc->modes[i].mapping);
723 }
724
725 put_bits(&pb, 1, 1); // framing
726
727 flush_put_bits(&pb);
728 hlens[2] = put_bits_count(&pb) >> 3;
729
730 len = hlens[0] + hlens[1] + hlens[2];
731 p = *out = av_mallocz(64 + len + len/255);
732 if (!p)
733 return AVERROR(ENOMEM);
734
735 *p++ = 2;
736 p += av_xiphlacing(p, hlens[0]);
737 p += av_xiphlacing(p, hlens[1]);
738 buffer_len = 0;
739 for (i = 0; i < 3; i++) {
740 memcpy(p, buffer + buffer_len, hlens[i]);
741 p += hlens[i];
742 buffer_len += hlens[i];
743 }
744
745 av_freep(&buffer);
746 return p - *out;
747 }
748
get_floor_average(vorbis_enc_floor * fc,float * coeffs,int i)749 static float get_floor_average(vorbis_enc_floor * fc, float *coeffs, int i)
750 {
751 int begin = fc->list[fc->list[FFMAX(i-1, 0)].sort].x;
752 int end = fc->list[fc->list[FFMIN(i+1, fc->values - 1)].sort].x;
753 int j;
754 float average = 0;
755
756 for (j = begin; j < end; j++)
757 average += fabs(coeffs[j]);
758 return average / (end - begin);
759 }
760
floor_fit(vorbis_enc_context * venc,vorbis_enc_floor * fc,float * coeffs,uint16_t * posts,int samples)761 static void floor_fit(vorbis_enc_context *venc, vorbis_enc_floor *fc,
762 float *coeffs, uint16_t *posts, int samples)
763 {
764 int range = 255 / fc->multiplier + 1;
765 int i;
766 float tot_average = 0.0;
767 float averages[MAX_FLOOR_VALUES];
768 for (i = 0; i < fc->values; i++) {
769 averages[i] = get_floor_average(fc, coeffs, i);
770 tot_average += averages[i];
771 }
772 tot_average /= fc->values;
773 tot_average /= venc->quality;
774
775 for (i = 0; i < fc->values; i++) {
776 int position = fc->list[fc->list[i].sort].x;
777 float average = averages[i];
778 int j;
779
780 average = sqrt(tot_average * average) * pow(1.25f, position*0.005f); // MAGIC!
781 for (j = 0; j < range - 1; j++)
782 if (ff_vorbis_floor1_inverse_db_table[j * fc->multiplier] > average)
783 break;
784 posts[fc->list[i].sort] = j;
785 }
786 }
787
render_point(int x0,int y0,int x1,int y1,int x)788 static int render_point(int x0, int y0, int x1, int y1, int x)
789 {
790 return y0 + (x - x0) * (y1 - y0) / (x1 - x0);
791 }
792
floor_encode(vorbis_enc_context * venc,vorbis_enc_floor * fc,PutBitContext * pb,uint16_t * posts,float * floor,int samples)793 static int floor_encode(vorbis_enc_context *venc, vorbis_enc_floor *fc,
794 PutBitContext *pb, uint16_t *posts,
795 float *floor, int samples)
796 {
797 int range = 255 / fc->multiplier + 1;
798 int coded[MAX_FLOOR_VALUES]; // first 2 values are unused
799 int i, counter;
800
801 if (pb->size_in_bits - put_bits_count(pb) < 1 + 2 * ilog(range - 1))
802 return AVERROR(EINVAL);
803 put_bits(pb, 1, 1); // non zero
804 put_bits(pb, ilog(range - 1), posts[0]);
805 put_bits(pb, ilog(range - 1), posts[1]);
806 coded[0] = coded[1] = 1;
807
808 for (i = 2; i < fc->values; i++) {
809 int predicted = render_point(fc->list[fc->list[i].low].x,
810 posts[fc->list[i].low],
811 fc->list[fc->list[i].high].x,
812 posts[fc->list[i].high],
813 fc->list[i].x);
814 int highroom = range - predicted;
815 int lowroom = predicted;
816 int room = FFMIN(highroom, lowroom);
817 if (predicted == posts[i]) {
818 coded[i] = 0; // must be used later as flag!
819 continue;
820 } else {
821 if (!coded[fc->list[i].low ])
822 coded[fc->list[i].low ] = -1;
823 if (!coded[fc->list[i].high])
824 coded[fc->list[i].high] = -1;
825 }
826 if (posts[i] > predicted) {
827 if (posts[i] - predicted > room)
828 coded[i] = posts[i] - predicted + lowroom;
829 else
830 coded[i] = (posts[i] - predicted) << 1;
831 } else {
832 if (predicted - posts[i] > room)
833 coded[i] = predicted - posts[i] + highroom - 1;
834 else
835 coded[i] = ((predicted - posts[i]) << 1) - 1;
836 }
837 }
838
839 counter = 2;
840 for (i = 0; i < fc->partitions; i++) {
841 vorbis_enc_floor_class * c = &fc->classes[fc->partition_to_class[i]];
842 int k, cval = 0, csub = 1<<c->subclass;
843 if (c->subclass) {
844 vorbis_enc_codebook * book = &venc->codebooks[c->masterbook];
845 int cshift = 0;
846 for (k = 0; k < c->dim; k++) {
847 int l;
848 for (l = 0; l < csub; l++) {
849 int maxval = 1;
850 if (c->books[l] != -1)
851 maxval = venc->codebooks[c->books[l]].nentries;
852 // coded could be -1, but this still works, cause that is 0
853 if (coded[counter + k] < maxval)
854 break;
855 }
856 assert(l != csub);
857 cval |= l << cshift;
858 cshift += c->subclass;
859 }
860 if (put_codeword(pb, book, cval))
861 return AVERROR(EINVAL);
862 }
863 for (k = 0; k < c->dim; k++) {
864 int book = c->books[cval & (csub-1)];
865 int entry = coded[counter++];
866 cval >>= c->subclass;
867 if (book == -1)
868 continue;
869 if (entry == -1)
870 entry = 0;
871 if (put_codeword(pb, &venc->codebooks[book], entry))
872 return AVERROR(EINVAL);
873 }
874 }
875
876 ff_vorbis_floor1_render_list(fc->list, fc->values, posts, coded,
877 fc->multiplier, floor, samples);
878
879 return 0;
880 }
881
put_vector(vorbis_enc_codebook * book,PutBitContext * pb,float * num)882 static float *put_vector(vorbis_enc_codebook *book, PutBitContext *pb,
883 float *num)
884 {
885 int i, entry = -1;
886 float distance = FLT_MAX;
887 assert(book->dimensions);
888 for (i = 0; i < book->nentries; i++) {
889 float * vec = book->dimensions + i * book->ndimensions, d = book->pow2[i];
890 int j;
891 if (!book->lens[i])
892 continue;
893 for (j = 0; j < book->ndimensions; j++)
894 d -= vec[j] * num[j];
895 if (distance > d) {
896 entry = i;
897 distance = d;
898 }
899 }
900 if (put_codeword(pb, book, entry))
901 return NULL;
902 return &book->dimensions[entry * book->ndimensions];
903 }
904
residue_encode(vorbis_enc_context * venc,vorbis_enc_residue * rc,PutBitContext * pb,float * coeffs,int samples,int real_ch)905 static int residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
906 PutBitContext *pb, float *coeffs, int samples,
907 int real_ch)
908 {
909 int pass, i, j, p, k;
910 int psize = rc->partition_size;
911 int partitions = (rc->end - rc->begin) / psize;
912 int channels = (rc->type == 2) ? 1 : real_ch;
913 int classes[MAX_CHANNELS][NUM_RESIDUE_PARTITIONS];
914 int classwords = venc->codebooks[rc->classbook].ndimensions;
915
916 av_assert0(rc->type == 2);
917 av_assert0(real_ch == 2);
918 for (p = 0; p < partitions; p++) {
919 float max1 = 0.0, max2 = 0.0;
920 int s = rc->begin + p * psize;
921 for (k = s; k < s + psize; k += 2) {
922 max1 = FFMAX(max1, fabs(coeffs[ k / real_ch]));
923 max2 = FFMAX(max2, fabs(coeffs[samples + k / real_ch]));
924 }
925
926 for (i = 0; i < rc->classifications - 1; i++)
927 if (max1 < rc->maxes[i][0] && max2 < rc->maxes[i][1])
928 break;
929 classes[0][p] = i;
930 }
931
932 for (pass = 0; pass < 8; pass++) {
933 p = 0;
934 while (p < partitions) {
935 if (pass == 0)
936 for (j = 0; j < channels; j++) {
937 vorbis_enc_codebook * book = &venc->codebooks[rc->classbook];
938 int entry = 0;
939 for (i = 0; i < classwords; i++) {
940 entry *= rc->classifications;
941 entry += classes[j][p + i];
942 }
943 if (put_codeword(pb, book, entry))
944 return AVERROR(EINVAL);
945 }
946 for (i = 0; i < classwords && p < partitions; i++, p++) {
947 for (j = 0; j < channels; j++) {
948 int nbook = rc->books[classes[j][p]][pass];
949 vorbis_enc_codebook * book = &venc->codebooks[nbook];
950 float *buf = coeffs + samples*j + rc->begin + p*psize;
951 if (nbook == -1)
952 continue;
953
954 assert(rc->type == 0 || rc->type == 2);
955 assert(!(psize % book->ndimensions));
956
957 if (rc->type == 0) {
958 for (k = 0; k < psize; k += book->ndimensions) {
959 int l;
960 float *a = put_vector(book, pb, &buf[k]);
961 if (!a)
962 return AVERROR(EINVAL);
963 for (l = 0; l < book->ndimensions; l++)
964 buf[k + l] -= a[l];
965 }
966 } else {
967 int s = rc->begin + p * psize, a1, b1;
968 a1 = (s % real_ch) * samples;
969 b1 = s / real_ch;
970 s = real_ch * samples;
971 for (k = 0; k < psize; k += book->ndimensions) {
972 int dim, a2 = a1, b2 = b1;
973 float vec[MAX_CODEBOOK_DIM], *pv = vec;
974 for (dim = book->ndimensions; dim--; ) {
975 *pv++ = coeffs[a2 + b2];
976 if ((a2 += samples) == s) {
977 a2 = 0;
978 b2++;
979 }
980 }
981 pv = put_vector(book, pb, vec);
982 if (!pv)
983 return AVERROR(EINVAL);
984 for (dim = book->ndimensions; dim--; ) {
985 coeffs[a1 + b1] -= *pv++;
986 if ((a1 += samples) == s) {
987 a1 = 0;
988 b1++;
989 }
990 }
991 }
992 }
993 }
994 }
995 }
996 }
997 return 0;
998 }
999
apply_window_and_mdct(vorbis_enc_context * venc)1000 static int apply_window_and_mdct(vorbis_enc_context *venc)
1001 {
1002 int channel;
1003 const float * win = venc->win[1];
1004 int window_len = 1 << (venc->log2_blocksize[1] - 1);
1005 float n = (float)(1 << venc->log2_blocksize[1]) / 4.0;
1006 AVFloatDSPContext *fdsp = venc->fdsp;
1007
1008 for (channel = 0; channel < venc->channels; channel++) {
1009 float *offset = venc->samples + channel * window_len * 2;
1010
1011 fdsp->vector_fmul(offset, offset, win, window_len);
1012 fdsp->vector_fmul_scalar(offset, offset, 1/n, window_len);
1013
1014 offset += window_len;
1015
1016 fdsp->vector_fmul_reverse(offset, offset, win, window_len);
1017 fdsp->vector_fmul_scalar(offset, offset, 1/n, window_len);
1018
1019 venc->mdct[1].mdct_calc(&venc->mdct[1], venc->coeffs + channel * window_len,
1020 venc->samples + channel * window_len * 2);
1021 }
1022 return 1;
1023 }
1024
1025 /* Used for padding the last encoded packet */
spawn_empty_frame(AVCodecContext * avctx,int channels)1026 static AVFrame *spawn_empty_frame(AVCodecContext *avctx, int channels)
1027 {
1028 AVFrame *f = av_frame_alloc();
1029 int ch;
1030
1031 if (!f)
1032 return NULL;
1033
1034 f->format = avctx->sample_fmt;
1035 f->nb_samples = avctx->frame_size;
1036 f->channel_layout = avctx->channel_layout;
1037
1038 if (av_frame_get_buffer(f, 4)) {
1039 av_frame_free(&f);
1040 return NULL;
1041 }
1042
1043 for (ch = 0; ch < channels; ch++) {
1044 size_t bps = av_get_bytes_per_sample(f->format);
1045 memset(f->extended_data[ch], 0, bps * f->nb_samples);
1046 }
1047 return f;
1048 }
1049
1050 /* Set up audio samples for psy analysis and window/mdct */
move_audio(vorbis_enc_context * venc,int sf_size)1051 static void move_audio(vorbis_enc_context *venc, int sf_size)
1052 {
1053 AVFrame *cur = NULL;
1054 int frame_size = 1 << (venc->log2_blocksize[1] - 1);
1055 int subframes = frame_size / sf_size;
1056 int sf, ch;
1057
1058 /* Copy samples from last frame into current frame */
1059 if (venc->have_saved)
1060 for (ch = 0; ch < venc->channels; ch++)
1061 memcpy(venc->samples + 2 * ch * frame_size,
1062 venc->saved + ch * frame_size, sizeof(float) * frame_size);
1063 else
1064 for (ch = 0; ch < venc->channels; ch++)
1065 memset(venc->samples + 2 * ch * frame_size, 0, sizeof(float) * frame_size);
1066
1067 for (sf = 0; sf < subframes; sf++) {
1068 cur = ff_bufqueue_get(&venc->bufqueue);
1069
1070 for (ch = 0; ch < venc->channels; ch++) {
1071 float *offset = venc->samples + 2 * ch * frame_size + frame_size;
1072 float *save = venc->saved + ch * frame_size;
1073 const float *input = (float *) cur->extended_data[ch];
1074 const size_t len = cur->nb_samples * sizeof(float);
1075
1076 memcpy(offset + sf*sf_size, input, len);
1077 memcpy(save + sf*sf_size, input, len); // Move samples for next frame
1078 }
1079 av_frame_free(&cur);
1080 }
1081 venc->have_saved = 1;
1082 memcpy(venc->scratch, venc->samples, 2 * venc->channels * frame_size);
1083 }
1084
vorbis_encode_frame(AVCodecContext * avctx,AVPacket * avpkt,const AVFrame * frame,int * got_packet_ptr)1085 static int vorbis_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
1086 const AVFrame *frame, int *got_packet_ptr)
1087 {
1088 vorbis_enc_context *venc = avctx->priv_data;
1089 int i, ret, need_more;
1090 int frame_size = 1 << (venc->log2_blocksize[1] - 1);
1091 vorbis_enc_mode *mode;
1092 vorbis_enc_mapping *mapping;
1093 PutBitContext pb;
1094
1095 if (frame) {
1096 AVFrame *clone;
1097 if ((ret = ff_af_queue_add(&venc->afq, frame)) < 0)
1098 return ret;
1099 clone = av_frame_clone(frame);
1100 if (!clone)
1101 return AVERROR(ENOMEM);
1102 ff_bufqueue_add(avctx, &venc->bufqueue, clone);
1103 } else
1104 if (!venc->afq.remaining_samples)
1105 return 0;
1106
1107 need_more = venc->bufqueue.available * avctx->frame_size < frame_size;
1108 need_more = frame && need_more;
1109 if (need_more)
1110 return 0;
1111
1112 /* Pad the bufqueue with empty frames for encoding the last packet. */
1113 if (!frame) {
1114 if (venc->bufqueue.available * avctx->frame_size < frame_size) {
1115 int frames_needed = (frame_size/avctx->frame_size) - venc->bufqueue.available;
1116 int i;
1117
1118 for (i = 0; i < frames_needed; i++) {
1119 AVFrame *empty = spawn_empty_frame(avctx, venc->channels);
1120 if (!empty)
1121 return AVERROR(ENOMEM);
1122
1123 ff_bufqueue_add(avctx, &venc->bufqueue, empty);
1124 }
1125 }
1126 }
1127
1128 move_audio(venc, avctx->frame_size);
1129
1130 if (!apply_window_and_mdct(venc))
1131 return 0;
1132
1133 if ((ret = ff_alloc_packet2(avctx, avpkt, 8192, 0)) < 0)
1134 return ret;
1135
1136 init_put_bits(&pb, avpkt->data, avpkt->size);
1137
1138 if (pb.size_in_bits - put_bits_count(&pb) < 1 + ilog(venc->nmodes - 1)) {
1139 av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n");
1140 return AVERROR(EINVAL);
1141 }
1142
1143 put_bits(&pb, 1, 0); // magic bit
1144
1145 put_bits(&pb, ilog(venc->nmodes - 1), 1); // Mode for current frame
1146
1147 mode = &venc->modes[1];
1148 mapping = &venc->mappings[mode->mapping];
1149 if (mode->blockflag) {
1150 put_bits(&pb, 1, 1); // Previous windowflag
1151 put_bits(&pb, 1, 1); // Next windowflag
1152 }
1153
1154 for (i = 0; i < venc->channels; i++) {
1155 vorbis_enc_floor *fc = &venc->floors[mapping->floor[mapping->mux[i]]];
1156 uint16_t posts[MAX_FLOOR_VALUES];
1157 floor_fit(venc, fc, &venc->coeffs[i * frame_size], posts, frame_size);
1158 if (floor_encode(venc, fc, &pb, posts, &venc->floor[i * frame_size], frame_size)) {
1159 av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n");
1160 return AVERROR(EINVAL);
1161 }
1162 }
1163
1164 for (i = 0; i < venc->channels * frame_size; i++)
1165 venc->coeffs[i] /= venc->floor[i];
1166
1167 for (i = 0; i < mapping->coupling_steps; i++) {
1168 float *mag = venc->coeffs + mapping->magnitude[i] * frame_size;
1169 float *ang = venc->coeffs + mapping->angle[i] * frame_size;
1170 int j;
1171 for (j = 0; j < frame_size; j++) {
1172 float a = ang[j];
1173 ang[j] -= mag[j];
1174 if (mag[j] > 0)
1175 ang[j] = -ang[j];
1176 if (ang[j] < 0)
1177 mag[j] = a;
1178 }
1179 }
1180
1181 if (residue_encode(venc, &venc->residues[mapping->residue[mapping->mux[0]]],
1182 &pb, venc->coeffs, frame_size, venc->channels)) {
1183 av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n");
1184 return AVERROR(EINVAL);
1185 }
1186
1187 flush_put_bits(&pb);
1188 avpkt->size = put_bits_count(&pb) >> 3;
1189
1190 ff_af_queue_remove(&venc->afq, frame_size, &avpkt->pts, &avpkt->duration);
1191
1192 if (frame_size > avpkt->duration) {
1193 uint8_t *side = av_packet_new_side_data(avpkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
1194 if (!side)
1195 return AVERROR(ENOMEM);
1196 AV_WL32(&side[4], frame_size - avpkt->duration);
1197 }
1198
1199 *got_packet_ptr = 1;
1200 return 0;
1201 }
1202
1203
vorbis_encode_close(AVCodecContext * avctx)1204 static av_cold int vorbis_encode_close(AVCodecContext *avctx)
1205 {
1206 vorbis_enc_context *venc = avctx->priv_data;
1207 int i;
1208
1209 if (venc->codebooks)
1210 for (i = 0; i < venc->ncodebooks; i++) {
1211 av_freep(&venc->codebooks[i].lens);
1212 av_freep(&venc->codebooks[i].codewords);
1213 av_freep(&venc->codebooks[i].quantlist);
1214 av_freep(&venc->codebooks[i].dimensions);
1215 av_freep(&venc->codebooks[i].pow2);
1216 }
1217 av_freep(&venc->codebooks);
1218
1219 if (venc->floors)
1220 for (i = 0; i < venc->nfloors; i++) {
1221 int j;
1222 if (venc->floors[i].classes)
1223 for (j = 0; j < venc->floors[i].nclasses; j++)
1224 av_freep(&venc->floors[i].classes[j].books);
1225 av_freep(&venc->floors[i].classes);
1226 av_freep(&venc->floors[i].partition_to_class);
1227 av_freep(&venc->floors[i].list);
1228 }
1229 av_freep(&venc->floors);
1230
1231 if (venc->residues)
1232 for (i = 0; i < venc->nresidues; i++) {
1233 av_freep(&venc->residues[i].books);
1234 av_freep(&venc->residues[i].maxes);
1235 }
1236 av_freep(&venc->residues);
1237
1238 if (venc->mappings)
1239 for (i = 0; i < venc->nmappings; i++) {
1240 av_freep(&venc->mappings[i].mux);
1241 av_freep(&venc->mappings[i].floor);
1242 av_freep(&venc->mappings[i].residue);
1243 av_freep(&venc->mappings[i].magnitude);
1244 av_freep(&venc->mappings[i].angle);
1245 }
1246 av_freep(&venc->mappings);
1247
1248 av_freep(&venc->modes);
1249
1250 av_freep(&venc->saved);
1251 av_freep(&venc->samples);
1252 av_freep(&venc->floor);
1253 av_freep(&venc->coeffs);
1254 av_freep(&venc->scratch);
1255 av_freep(&venc->fdsp);
1256
1257 ff_mdct_end(&venc->mdct[0]);
1258 ff_mdct_end(&venc->mdct[1]);
1259 ff_af_queue_close(&venc->afq);
1260 ff_bufqueue_discard_all(&venc->bufqueue);
1261
1262 av_freep(&avctx->extradata);
1263
1264 return 0 ;
1265 }
1266
vorbis_encode_init(AVCodecContext * avctx)1267 static av_cold int vorbis_encode_init(AVCodecContext *avctx)
1268 {
1269 vorbis_enc_context *venc = avctx->priv_data;
1270 int ret;
1271
1272 if (avctx->channels != 2) {
1273 av_log(avctx, AV_LOG_ERROR, "Current FFmpeg Vorbis encoder only supports 2 channels.\n");
1274 return -1;
1275 }
1276
1277 if ((ret = create_vorbis_context(venc, avctx)) < 0)
1278 goto error;
1279
1280 avctx->bit_rate = 0;
1281 if (avctx->flags & AV_CODEC_FLAG_QSCALE)
1282 venc->quality = avctx->global_quality / (float)FF_QP2LAMBDA;
1283 else
1284 venc->quality = 8;
1285 venc->quality *= venc->quality;
1286
1287 if ((ret = put_main_header(venc, (uint8_t**)&avctx->extradata)) < 0)
1288 goto error;
1289 avctx->extradata_size = ret;
1290
1291 avctx->frame_size = 64;
1292
1293 ff_af_queue_init(avctx, &venc->afq);
1294
1295 return 0;
1296 error:
1297 vorbis_encode_close(avctx);
1298 return ret;
1299 }
1300
1301 AVCodec ff_vorbis_encoder = {
1302 .name = "vorbis",
1303 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1304 .type = AVMEDIA_TYPE_AUDIO,
1305 .id = AV_CODEC_ID_VORBIS,
1306 .priv_data_size = sizeof(vorbis_enc_context),
1307 .init = vorbis_encode_init,
1308 .encode2 = vorbis_encode_frame,
1309 .close = vorbis_encode_close,
1310 .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_EXPERIMENTAL,
1311 .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
1312 AV_SAMPLE_FMT_NONE },
1313 };
1314