3 * Copyright (c) 2001-2003 The ffmpeg Project
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "bytestream.h"
29 * First version by Francois Revol (revol@free.fr)
30 * Fringe ADPCM codecs (e.g., DK3, DK4, Westwood)
31 * by Mike Melanson (melanson@pcisys.net)
32 * CD-ROM XA ADPCM codec by BERO
33 * EA ADPCM decoder by Robin Kay (komadori@myrealbox.com)
34 * EA ADPCM R1/R2/R3 decoder by Peter Ross (pross@xvid.org)
35 * EA IMA EACS decoder by Peter Ross (pross@xvid.org)
36 * EA IMA SEAD decoder by Peter Ross (pross@xvid.org)
37 * EA ADPCM XAS decoder by Peter Ross (pross@xvid.org)
38 * MAXIS EA ADPCM decoder by Robert Marston (rmarston@gmail.com)
39 * THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl)
41 * Features and limitations:
43 * Reference documents:
44 * http://www.pcisys.net/~melanson/codecs/simpleaudio.html
45 * http://www.geocities.com/SiliconValley/8682/aud3.txt
46 * http://openquicktime.sourceforge.net/plugins.htm
47 * XAnim sources (xa_codec.c) http://www.rasnaimaging.com/people/lapus/download.html
48 * http://www.cs.ucla.edu/~leec/mediabench/applications.html
49 * SoX source code http://home.sprynet.com/~cbagwell/sox.html
52 * http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html
53 * vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html
54 * readstr http://www.geocities.co.jp/Playtown/2004/
59 /* step_table[] and index_table[] are from the ADPCM reference source */
60 /* This is the index table: */
61 static const int index_table[16] = {
62 -1, -1, -1, -1, 2, 4, 6, 8,
63 -1, -1, -1, -1, 2, 4, 6, 8,
67 * This is the step table. Note that many programs use slight deviations from
68 * this table, but such deviations are negligible:
70 static const int step_table[89] = {
71 7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
72 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
73 50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
74 130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
75 337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
76 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
77 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
78 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
79 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
82 /* These are for MS-ADPCM */
83 /* AdaptationTable[], AdaptCoeff1[], and AdaptCoeff2[] are from libsndfile */
84 static const int AdaptationTable[] = {
85 230, 230, 230, 230, 307, 409, 512, 614,
86 768, 614, 512, 409, 307, 230, 230, 230
89 /** Divided by 4 to fit in 8-bit integers */
90 static const uint8_t AdaptCoeff1[] = {
91 64, 128, 0, 48, 60, 115, 98
94 /** Divided by 4 to fit in 8-bit integers */
95 static const int8_t AdaptCoeff2[] = {
96 0, -64, 0, 16, 0, -52, -58
99 /* These are for CD-ROM XA ADPCM */
100 static const int xa_adpcm_table[5][2] = {
108 static const int ea_adpcm_table[] = {
109 0, 240, 460, 392, 0, 0, -208, -220, 0, 1,
110 3, 4, 7, 8, 10, 11, 0, -1, -3, -4
113 // padded to zero where table size is less then 16
114 static const int swf_index_tables[4][16] = {
116 /*3*/ { -1, -1, 2, 4 },
117 /*4*/ { -1, -1, -1, -1, 2, 4, 6, 8 },
118 /*5*/ { -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16 }
121 static const int yamaha_indexscale[] = {
122 230, 230, 230, 230, 307, 409, 512, 614,
123 230, 230, 230, 230, 307, 409, 512, 614
126 static const int yamaha_difflookup[] = {
127 1, 3, 5, 7, 9, 11, 13, 15,
128 -1, -3, -5, -7, -9, -11, -13, -15
133 typedef struct ADPCMChannelStatus {
135 short int step_index;
146 } ADPCMChannelStatus;
148 typedef struct TrellisPath {
153 typedef struct TrellisNode {
161 typedef struct ADPCMContext {
162 ADPCMChannelStatus status[6];
164 TrellisNode *node_buf;
165 TrellisNode **nodep_buf;
168 #define FREEZE_INTERVAL 128
170 /* XXX: implement encoding */
173 static av_cold int adpcm_encode_init(AVCodecContext *avctx)
175 ADPCMContext *s = avctx->priv_data;
178 if (avctx->channels > 2)
179 return -1; /* only stereo or mono =) */
181 if(avctx->trellis && (unsigned)avctx->trellis > 16U){
182 av_log(avctx, AV_LOG_ERROR, "invalid trellis size\n");
186 if (avctx->trellis) {
187 int frontier = 1 << avctx->trellis;
188 int max_paths = frontier * FREEZE_INTERVAL;
189 FF_ALLOC_OR_GOTO(avctx, s->paths, max_paths * sizeof(*s->paths), error);
190 FF_ALLOC_OR_GOTO(avctx, s->node_buf, 2 * frontier * sizeof(*s->node_buf), error);
191 FF_ALLOC_OR_GOTO(avctx, s->nodep_buf, 2 * frontier * sizeof(*s->nodep_buf), error);
194 switch(avctx->codec->id) {
195 case CODEC_ID_ADPCM_IMA_WAV:
196 avctx->frame_size = (BLKSIZE - 4 * avctx->channels) * 8 / (4 * avctx->channels) + 1; /* each 16 bits sample gives one nibble */
197 /* and we have 4 bytes per channel overhead */
198 avctx->block_align = BLKSIZE;
199 /* seems frame_size isn't taken into account... have to buffer the samples :-( */
201 case CODEC_ID_ADPCM_IMA_QT:
202 avctx->frame_size = 64;
203 avctx->block_align = 34 * avctx->channels;
205 case CODEC_ID_ADPCM_MS:
206 avctx->frame_size = (BLKSIZE - 7 * avctx->channels) * 2 / avctx->channels + 2; /* each 16 bits sample gives one nibble */
207 /* and we have 7 bytes per channel overhead */
208 avctx->block_align = BLKSIZE;
209 avctx->extradata_size = 32;
210 extradata = avctx->extradata = av_malloc(avctx->extradata_size);
212 return AVERROR(ENOMEM);
213 bytestream_put_le16(&extradata, avctx->frame_size);
214 bytestream_put_le16(&extradata, 7); /* wNumCoef */
215 for (i = 0; i < 7; i++) {
216 bytestream_put_le16(&extradata, AdaptCoeff1[i] * 4);
217 bytestream_put_le16(&extradata, AdaptCoeff2[i] * 4);
220 case CODEC_ID_ADPCM_YAMAHA:
221 avctx->frame_size = BLKSIZE * avctx->channels;
222 avctx->block_align = BLKSIZE;
224 case CODEC_ID_ADPCM_SWF:
225 if (avctx->sample_rate != 11025 &&
226 avctx->sample_rate != 22050 &&
227 avctx->sample_rate != 44100) {
228 av_log(avctx, AV_LOG_ERROR, "Sample rate must be 11025, 22050 or 44100\n");
231 avctx->frame_size = 512 * (avctx->sample_rate / 11025);
237 avctx->coded_frame= avcodec_alloc_frame();
238 avctx->coded_frame->key_frame= 1;
243 av_freep(&s->node_buf);
244 av_freep(&s->nodep_buf);
248 static av_cold int adpcm_encode_close(AVCodecContext *avctx)
250 ADPCMContext *s = avctx->priv_data;
251 av_freep(&avctx->coded_frame);
253 av_freep(&s->node_buf);
254 av_freep(&s->nodep_buf);
260 static inline unsigned char adpcm_ima_compress_sample(ADPCMChannelStatus *c, short sample)
262 int delta = sample - c->prev_sample;
263 int nibble = FFMIN(7, abs(delta)*4/step_table[c->step_index]) + (delta<0)*8;
264 c->prev_sample += ((step_table[c->step_index] * yamaha_difflookup[nibble]) / 8);
265 c->prev_sample = av_clip_int16(c->prev_sample);
266 c->step_index = av_clip(c->step_index + index_table[nibble], 0, 88);
270 static inline unsigned char adpcm_ms_compress_sample(ADPCMChannelStatus *c, short sample)
272 int predictor, nibble, bias;
274 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
276 nibble= sample - predictor;
277 if(nibble>=0) bias= c->idelta/2;
278 else bias=-c->idelta/2;
280 nibble= (nibble + bias) / c->idelta;
281 nibble= av_clip(nibble, -8, 7)&0x0F;
283 predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
285 c->sample2 = c->sample1;
286 c->sample1 = av_clip_int16(predictor);
288 c->idelta = (AdaptationTable[(int)nibble] * c->idelta) >> 8;
289 if (c->idelta < 16) c->idelta = 16;
294 static inline unsigned char adpcm_yamaha_compress_sample(ADPCMChannelStatus *c, short sample)
303 delta = sample - c->predictor;
305 nibble = FFMIN(7, abs(delta)*4/c->step) + (delta<0)*8;
307 c->predictor += ((c->step * yamaha_difflookup[nibble]) / 8);
308 c->predictor = av_clip_int16(c->predictor);
309 c->step = (c->step * yamaha_indexscale[nibble]) >> 8;
310 c->step = av_clip(c->step, 127, 24567);
315 static void adpcm_compress_trellis(AVCodecContext *avctx, const short *samples,
316 uint8_t *dst, ADPCMChannelStatus *c, int n)
318 //FIXME 6% faster if frontier is a compile-time constant
319 ADPCMContext *s = avctx->priv_data;
320 const int frontier = 1 << avctx->trellis;
321 const int stride = avctx->channels;
322 const int version = avctx->codec->id;
323 TrellisPath *paths = s->paths, *p;
324 TrellisNode *node_buf = s->node_buf;
325 TrellisNode **nodep_buf = s->nodep_buf;
326 TrellisNode **nodes = nodep_buf; // nodes[] is always sorted by .ssd
327 TrellisNode **nodes_next = nodep_buf + frontier;
328 int pathn = 0, froze = -1, i, j, k;
330 memset(nodep_buf, 0, 2 * frontier * sizeof(*nodep_buf));
331 nodes[0] = node_buf + frontier;
334 nodes[0]->step = c->step_index;
335 nodes[0]->sample1 = c->sample1;
336 nodes[0]->sample2 = c->sample2;
337 if((version == CODEC_ID_ADPCM_IMA_WAV) || (version == CODEC_ID_ADPCM_IMA_QT) || (version == CODEC_ID_ADPCM_SWF))
338 nodes[0]->sample1 = c->prev_sample;
339 if(version == CODEC_ID_ADPCM_MS)
340 nodes[0]->step = c->idelta;
341 if(version == CODEC_ID_ADPCM_YAMAHA) {
343 nodes[0]->step = 127;
344 nodes[0]->sample1 = 0;
346 nodes[0]->step = c->step;
347 nodes[0]->sample1 = c->predictor;
352 TrellisNode *t = node_buf + frontier*(i&1);
354 int sample = samples[i*stride];
355 memset(nodes_next, 0, frontier*sizeof(TrellisNode*));
356 for(j=0; j<frontier && nodes[j]; j++) {
357 // higher j have higher ssd already, so they're unlikely to use a suboptimal next sample too
358 const int range = (j < frontier/2) ? 1 : 0;
359 const int step = nodes[j]->step;
361 if(version == CODEC_ID_ADPCM_MS) {
362 const int predictor = ((nodes[j]->sample1 * c->coeff1) + (nodes[j]->sample2 * c->coeff2)) / 64;
363 const int div = (sample - predictor) / step;
364 const int nmin = av_clip(div-range, -8, 6);
365 const int nmax = av_clip(div+range, -7, 7);
366 for(nidx=nmin; nidx<=nmax; nidx++) {
367 const int nibble = nidx & 0xf;
368 int dec_sample = predictor + nidx * step;
369 #define STORE_NODE(NAME, STEP_INDEX)\
372 dec_sample = av_clip_int16(dec_sample);\
373 d = sample - dec_sample;\
374 ssd = nodes[j]->ssd + d*d;\
375 if(nodes_next[frontier-1] && ssd >= nodes_next[frontier-1]->ssd)\
377 /* Collapse any two states with the same previous sample value. \
378 * One could also distinguish states by step and by 2nd to last
379 * sample, but the effects of that are negligible. */\
380 for(k=0; k<frontier && nodes_next[k]; k++) {\
381 if(dec_sample == nodes_next[k]->sample1) {\
382 assert(ssd >= nodes_next[k]->ssd);\
386 for(k=0; k<frontier; k++) {\
387 if(!nodes_next[k] || ssd < nodes_next[k]->ssd) {\
388 TrellisNode *u = nodes_next[frontier-1];\
390 assert(pathn < FREEZE_INTERVAL<<avctx->trellis);\
395 u->step = STEP_INDEX;\
396 u->sample2 = nodes[j]->sample1;\
397 u->sample1 = dec_sample;\
398 paths[u->path].nibble = nibble;\
399 paths[u->path].prev = nodes[j]->path;\
400 memmove(&nodes_next[k+1], &nodes_next[k], (frontier-k-1)*sizeof(TrellisNode*));\
406 STORE_NODE(ms, FFMAX(16, (AdaptationTable[nibble] * step) >> 8));
408 } else if((version == CODEC_ID_ADPCM_IMA_WAV)|| (version == CODEC_ID_ADPCM_IMA_QT)|| (version == CODEC_ID_ADPCM_SWF)) {
409 #define LOOP_NODES(NAME, STEP_TABLE, STEP_INDEX)\
410 const int predictor = nodes[j]->sample1;\
411 const int div = (sample - predictor) * 4 / STEP_TABLE;\
412 int nmin = av_clip(div-range, -7, 6);\
413 int nmax = av_clip(div+range, -6, 7);\
414 if(nmin<=0) nmin--; /* distinguish -0 from +0 */\
416 for(nidx=nmin; nidx<=nmax; nidx++) {\
417 const int nibble = nidx<0 ? 7-nidx : nidx;\
418 int dec_sample = predictor + (STEP_TABLE * yamaha_difflookup[nibble]) / 8;\
419 STORE_NODE(NAME, STEP_INDEX);\
421 LOOP_NODES(ima, step_table[step], av_clip(step + index_table[nibble], 0, 88));
422 } else { //CODEC_ID_ADPCM_YAMAHA
423 LOOP_NODES(yamaha, step, av_clip((step * yamaha_indexscale[nibble]) >> 8, 127, 24567));
434 if(nodes[0]->ssd > (1<<28)) {
435 for(j=1; j<frontier && nodes[j]; j++)
436 nodes[j]->ssd -= nodes[0]->ssd;
440 // merge old paths to save memory
441 if(i == froze + FREEZE_INTERVAL) {
442 p = &paths[nodes[0]->path];
443 for(k=i; k>froze; k--) {
449 // other nodes might use paths that don't coincide with the frozen one.
450 // checking which nodes do so is too slow, so just kill them all.
451 // this also slightly improves quality, but I don't know why.
452 memset(nodes+1, 0, (frontier-1)*sizeof(TrellisNode*));
456 p = &paths[nodes[0]->path];
457 for(i=n-1; i>froze; i--) {
462 c->predictor = nodes[0]->sample1;
463 c->sample1 = nodes[0]->sample1;
464 c->sample2 = nodes[0]->sample2;
465 c->step_index = nodes[0]->step;
466 c->step = nodes[0]->step;
467 c->idelta = nodes[0]->step;
470 static int adpcm_encode_frame(AVCodecContext *avctx,
471 unsigned char *frame, int buf_size, void *data)
476 ADPCMContext *c = avctx->priv_data;
480 samples = (short *)data;
481 st= avctx->channels == 2;
482 /* n = (BLKSIZE - 4 * avctx->channels) / (2 * 8 * avctx->channels); */
484 switch(avctx->codec->id) {
485 case CODEC_ID_ADPCM_IMA_WAV:
486 n = avctx->frame_size / 8;
487 c->status[0].prev_sample = (signed short)samples[0]; /* XXX */
488 /* c->status[0].step_index = 0; *//* XXX: not sure how to init the state machine */
489 bytestream_put_le16(&dst, c->status[0].prev_sample);
490 *dst++ = (unsigned char)c->status[0].step_index;
491 *dst++ = 0; /* unknown */
493 if (avctx->channels == 2) {
494 c->status[1].prev_sample = (signed short)samples[0];
495 /* c->status[1].step_index = 0; */
496 bytestream_put_le16(&dst, c->status[1].prev_sample);
497 *dst++ = (unsigned char)c->status[1].step_index;
502 /* stereo: 4 bytes (8 samples) for left, 4 bytes for right, 4 bytes left, ... */
503 if(avctx->trellis > 0) {
504 FF_ALLOC_OR_GOTO(avctx, buf, 2*n*8, error);
505 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n*8);
506 if(avctx->channels == 2)
507 adpcm_compress_trellis(avctx, samples+1, buf + n*8, &c->status[1], n*8);
509 *dst++ = buf[8*i+0] | (buf[8*i+1] << 4);
510 *dst++ = buf[8*i+2] | (buf[8*i+3] << 4);
511 *dst++ = buf[8*i+4] | (buf[8*i+5] << 4);
512 *dst++ = buf[8*i+6] | (buf[8*i+7] << 4);
513 if (avctx->channels == 2) {
514 uint8_t *buf1 = buf + n*8;
515 *dst++ = buf1[8*i+0] | (buf1[8*i+1] << 4);
516 *dst++ = buf1[8*i+2] | (buf1[8*i+3] << 4);
517 *dst++ = buf1[8*i+4] | (buf1[8*i+5] << 4);
518 *dst++ = buf1[8*i+6] | (buf1[8*i+7] << 4);
524 *dst = adpcm_ima_compress_sample(&c->status[0], samples[0]);
525 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels]) << 4;
527 *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 2]);
528 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 3]) << 4;
530 *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 4]);
531 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 5]) << 4;
533 *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 6]);
534 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 7]) << 4;
537 if (avctx->channels == 2) {
538 *dst = adpcm_ima_compress_sample(&c->status[1], samples[1]);
539 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[3]) << 4;
541 *dst = adpcm_ima_compress_sample(&c->status[1], samples[5]);
542 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[7]) << 4;
544 *dst = adpcm_ima_compress_sample(&c->status[1], samples[9]);
545 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[11]) << 4;
547 *dst = adpcm_ima_compress_sample(&c->status[1], samples[13]);
548 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[15]) << 4;
551 samples += 8 * avctx->channels;
554 case CODEC_ID_ADPCM_IMA_QT:
558 init_put_bits(&pb, dst, buf_size*8);
560 for(ch=0; ch<avctx->channels; ch++){
561 put_bits(&pb, 9, (c->status[ch].prev_sample + 0x10000) >> 7);
562 put_bits(&pb, 7, c->status[ch].step_index);
563 if(avctx->trellis > 0) {
565 adpcm_compress_trellis(avctx, samples+ch, buf, &c->status[ch], 64);
567 put_bits(&pb, 4, buf[i^1]);
568 c->status[ch].prev_sample = c->status[ch].predictor & ~0x7F;
570 for (i=0; i<64; i+=2){
572 t1 = adpcm_ima_compress_sample(&c->status[ch], samples[avctx->channels*(i+0)+ch]);
573 t2 = adpcm_ima_compress_sample(&c->status[ch], samples[avctx->channels*(i+1)+ch]);
574 put_bits(&pb, 4, t2);
575 put_bits(&pb, 4, t1);
577 c->status[ch].prev_sample &= ~0x7F;
582 dst += put_bits_count(&pb)>>3;
585 case CODEC_ID_ADPCM_SWF:
589 init_put_bits(&pb, dst, buf_size*8);
591 n = avctx->frame_size-1;
593 //Store AdpcmCodeSize
594 put_bits(&pb, 2, 2); //Set 4bits flash adpcm format
596 //Init the encoder state
597 for(i=0; i<avctx->channels; i++){
598 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 63); // clip step so it fits 6 bits
599 put_sbits(&pb, 16, samples[i]);
600 put_bits(&pb, 6, c->status[i].step_index);
601 c->status[i].prev_sample = (signed short)samples[i];
604 if(avctx->trellis > 0) {
605 FF_ALLOC_OR_GOTO(avctx, buf, 2*n, error);
606 adpcm_compress_trellis(avctx, samples+2, buf, &c->status[0], n);
607 if (avctx->channels == 2)
608 adpcm_compress_trellis(avctx, samples+3, buf+n, &c->status[1], n);
610 put_bits(&pb, 4, buf[i]);
611 if (avctx->channels == 2)
612 put_bits(&pb, 4, buf[n+i]);
616 for (i=1; i<avctx->frame_size; i++) {
617 put_bits(&pb, 4, adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels*i]));
618 if (avctx->channels == 2)
619 put_bits(&pb, 4, adpcm_ima_compress_sample(&c->status[1], samples[2*i+1]));
623 dst += put_bits_count(&pb)>>3;
626 case CODEC_ID_ADPCM_MS:
627 for(i=0; i<avctx->channels; i++){
631 c->status[i].coeff1 = AdaptCoeff1[predictor];
632 c->status[i].coeff2 = AdaptCoeff2[predictor];
634 for(i=0; i<avctx->channels; i++){
635 if (c->status[i].idelta < 16)
636 c->status[i].idelta = 16;
638 bytestream_put_le16(&dst, c->status[i].idelta);
640 for(i=0; i<avctx->channels; i++){
641 c->status[i].sample2= *samples++;
643 for(i=0; i<avctx->channels; i++){
644 c->status[i].sample1= *samples++;
646 bytestream_put_le16(&dst, c->status[i].sample1);
648 for(i=0; i<avctx->channels; i++)
649 bytestream_put_le16(&dst, c->status[i].sample2);
651 if(avctx->trellis > 0) {
652 int n = avctx->block_align - 7*avctx->channels;
653 FF_ALLOC_OR_GOTO(avctx, buf, 2*n, error);
654 if(avctx->channels == 1) {
655 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
657 *dst++ = (buf[i] << 4) | buf[i+1];
659 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
660 adpcm_compress_trellis(avctx, samples+1, buf+n, &c->status[1], n);
662 *dst++ = (buf[i] << 4) | buf[n+i];
666 for(i=7*avctx->channels; i<avctx->block_align; i++) {
668 nibble = adpcm_ms_compress_sample(&c->status[ 0], *samples++)<<4;
669 nibble|= adpcm_ms_compress_sample(&c->status[st], *samples++);
673 case CODEC_ID_ADPCM_YAMAHA:
674 n = avctx->frame_size / 2;
675 if(avctx->trellis > 0) {
676 FF_ALLOC_OR_GOTO(avctx, buf, 2*n*2, error);
678 if(avctx->channels == 1) {
679 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
681 *dst++ = buf[i] | (buf[i+1] << 4);
683 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
684 adpcm_compress_trellis(avctx, samples+1, buf+n, &c->status[1], n);
686 *dst++ = buf[i] | (buf[n+i] << 4);
690 for (n *= avctx->channels; n>0; n--) {
692 nibble = adpcm_yamaha_compress_sample(&c->status[ 0], *samples++);
693 nibble |= adpcm_yamaha_compress_sample(&c->status[st], *samples++) << 4;
703 #endif //CONFIG_ENCODERS
705 static av_cold int adpcm_decode_init(AVCodecContext * avctx)
707 ADPCMContext *c = avctx->priv_data;
708 unsigned int max_channels = 2;
710 switch(avctx->codec->id) {
711 case CODEC_ID_ADPCM_EA_R1:
712 case CODEC_ID_ADPCM_EA_R2:
713 case CODEC_ID_ADPCM_EA_R3:
717 if(avctx->channels > max_channels){
721 switch(avctx->codec->id) {
722 case CODEC_ID_ADPCM_CT:
723 c->status[0].step = c->status[1].step = 511;
725 case CODEC_ID_ADPCM_IMA_WAV:
726 if (avctx->bits_per_coded_sample != 4) {
727 av_log(avctx, AV_LOG_ERROR, "Only 4-bit ADPCM IMA WAV files are supported\n");
731 case CODEC_ID_ADPCM_IMA_WS:
732 if (avctx->extradata && avctx->extradata_size == 2 * 4) {
733 c->status[0].predictor = AV_RL32(avctx->extradata);
734 c->status[1].predictor = AV_RL32(avctx->extradata + 4);
740 avctx->sample_fmt = SAMPLE_FMT_S16;
744 static inline short adpcm_ima_expand_nibble(ADPCMChannelStatus *c, char nibble, int shift)
748 int sign, delta, diff, step;
750 step = step_table[c->step_index];
751 step_index = c->step_index + index_table[(unsigned)nibble];
752 if (step_index < 0) step_index = 0;
753 else if (step_index > 88) step_index = 88;
757 /* perform direct multiplication instead of series of jumps proposed by
758 * the reference ADPCM implementation since modern CPUs can do the mults
760 diff = ((2 * delta + 1) * step) >> shift;
761 predictor = c->predictor;
762 if (sign) predictor -= diff;
763 else predictor += diff;
765 c->predictor = av_clip_int16(predictor);
766 c->step_index = step_index;
768 return (short)c->predictor;
771 static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, char nibble)
775 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
776 predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
778 c->sample2 = c->sample1;
779 c->sample1 = av_clip_int16(predictor);
780 c->idelta = (AdaptationTable[(int)nibble] * c->idelta) >> 8;
781 if (c->idelta < 16) c->idelta = 16;
786 static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
788 int sign, delta, diff;
793 /* perform direct multiplication instead of series of jumps proposed by
794 * the reference ADPCM implementation since modern CPUs can do the mults
796 diff = ((2 * delta + 1) * c->step) >> 3;
797 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
798 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
799 c->predictor = av_clip_int16(c->predictor);
800 /* calculate new step and clamp it to range 511..32767 */
801 new_step = (AdaptationTable[nibble & 7] * c->step) >> 8;
802 c->step = av_clip(new_step, 511, 32767);
804 return (short)c->predictor;
807 static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble, int size, int shift)
809 int sign, delta, diff;
811 sign = nibble & (1<<(size-1));
812 delta = nibble & ((1<<(size-1))-1);
813 diff = delta << (7 + c->step + shift);
816 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
818 /* calculate new step */
819 if (delta >= (2*size - 3) && c->step < 3)
821 else if (delta == 0 && c->step > 0)
824 return (short) c->predictor;
827 static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned char nibble)
834 c->predictor += (c->step * yamaha_difflookup[nibble]) / 8;
835 c->predictor = av_clip_int16(c->predictor);
836 c->step = (c->step * yamaha_indexscale[nibble]) >> 8;
837 c->step = av_clip(c->step, 127, 24567);
841 static void xa_decode(short *out, const unsigned char *in,
842 ADPCMChannelStatus *left, ADPCMChannelStatus *right, int inc)
845 int shift,filter,f0,f1;
851 shift = 12 - (in[4+i*2] & 15);
852 filter = in[4+i*2] >> 4;
853 f0 = xa_adpcm_table[filter][0];
854 f1 = xa_adpcm_table[filter][1];
862 t = (signed char)(d<<4)>>4;
863 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
865 s_1 = av_clip_int16(s);
870 if (inc==2) { /* stereo */
873 s_1 = right->sample1;
874 s_2 = right->sample2;
875 out = out + 1 - 28*2;
878 shift = 12 - (in[5+i*2] & 15);
879 filter = in[5+i*2] >> 4;
881 f0 = xa_adpcm_table[filter][0];
882 f1 = xa_adpcm_table[filter][1];
887 t = (signed char)d >> 4;
888 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
890 s_1 = av_clip_int16(s);
895 if (inc==2) { /* stereo */
896 right->sample1 = s_1;
897 right->sample2 = s_2;
907 /* DK3 ADPCM support macro */
908 #define DK3_GET_NEXT_NIBBLE() \
909 if (decode_top_nibble_next) \
911 nibble = last_byte >> 4; \
912 decode_top_nibble_next = 0; \
916 last_byte = *src++; \
917 if (src >= buf + buf_size) break; \
918 nibble = last_byte & 0x0F; \
919 decode_top_nibble_next = 1; \
922 static int adpcm_decode_frame(AVCodecContext *avctx,
923 void *data, int *data_size,
926 const uint8_t *buf = avpkt->data;
927 int buf_size = avpkt->size;
928 ADPCMContext *c = avctx->priv_data;
929 ADPCMChannelStatus *cs;
930 int n, m, channel, i;
931 int block_predictor[2];
937 /* DK3 ADPCM accounting variables */
938 unsigned char last_byte = 0;
939 unsigned char nibble;
940 int decode_top_nibble_next = 0;
943 /* EA ADPCM state variables */
944 uint32_t samples_in_chunk;
945 int32_t previous_left_sample, previous_right_sample;
946 int32_t current_left_sample, current_right_sample;
947 int32_t next_left_sample, next_right_sample;
948 int32_t coeff1l, coeff2l, coeff1r, coeff2r;
949 uint8_t shift_left, shift_right;
951 int coeff[2][2], shift[2];//used in EA MAXIS ADPCM
956 //should protect all 4bit ADPCM variants
957 //8 is needed for CODEC_ID_ADPCM_IMA_WAV with 2 channels
959 if(*data_size/4 < buf_size + 8)
963 samples_end= samples + *data_size/2;
967 st = avctx->channels == 2 ? 1 : 0;
969 switch(avctx->codec->id) {
970 case CODEC_ID_ADPCM_IMA_QT:
971 n = buf_size - 2*avctx->channels;
972 for (channel = 0; channel < avctx->channels; channel++) {
973 cs = &(c->status[channel]);
974 /* (pppppp) (piiiiiii) */
976 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
977 cs->predictor = (*src++) << 8;
978 cs->predictor |= (*src & 0x80);
979 cs->predictor &= 0xFF80;
982 if(cs->predictor & 0x8000)
983 cs->predictor -= 0x10000;
985 cs->predictor = av_clip_int16(cs->predictor);
987 cs->step_index = (*src++) & 0x7F;
989 if (cs->step_index > 88){
990 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", cs->step_index);
994 cs->step = step_table[cs->step_index];
996 samples = (short*)data + channel;
998 for(m=32; n>0 && m>0; n--, m--) { /* in QuickTime, IMA is encoded by chuncks of 34 bytes (=64 samples) */
999 *samples = adpcm_ima_expand_nibble(cs, src[0] & 0x0F, 3);
1000 samples += avctx->channels;
1001 *samples = adpcm_ima_expand_nibble(cs, src[0] >> 4 , 3);
1002 samples += avctx->channels;
1009 case CODEC_ID_ADPCM_IMA_WAV:
1010 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1011 buf_size = avctx->block_align;
1013 // samples_per_block= (block_align-4*chanels)*8 / (bits_per_sample * chanels) + 1;
1015 for(i=0; i<avctx->channels; i++){
1016 cs = &(c->status[i]);
1017 cs->predictor = *samples++ = (int16_t)bytestream_get_le16(&src);
1019 cs->step_index = *src++;
1020 if (cs->step_index > 88){
1021 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", cs->step_index);
1022 cs->step_index = 88;
1024 if (*src++) av_log(avctx, AV_LOG_ERROR, "unused byte should be null but is %d!!\n", src[-1]); /* unused */
1027 while(src < buf + buf_size){
1029 for(i=0; i<=st; i++)
1030 *samples++ = adpcm_ima_expand_nibble(&c->status[i], src[4*i] & 0x0F, 3);
1031 for(i=0; i<=st; i++)
1032 *samples++ = adpcm_ima_expand_nibble(&c->status[i], src[4*i] >> 4 , 3);
1038 case CODEC_ID_ADPCM_4XM:
1039 cs = &(c->status[0]);
1040 c->status[0].predictor= (int16_t)bytestream_get_le16(&src);
1042 c->status[1].predictor= (int16_t)bytestream_get_le16(&src);
1044 c->status[0].step_index= (int16_t)bytestream_get_le16(&src);
1046 c->status[1].step_index= (int16_t)bytestream_get_le16(&src);
1048 if (cs->step_index < 0) cs->step_index = 0;
1049 if (cs->step_index > 88) cs->step_index = 88;
1051 m= (buf_size - (src - buf))>>st;
1052 for(i=0; i<m; i++) {
1053 *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[i] & 0x0F, 4);
1055 *samples++ = adpcm_ima_expand_nibble(&c->status[1], src[i+m] & 0x0F, 4);
1056 *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[i] >> 4, 4);
1058 *samples++ = adpcm_ima_expand_nibble(&c->status[1], src[i+m] >> 4, 4);
1064 case CODEC_ID_ADPCM_MS:
1065 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1066 buf_size = avctx->block_align;
1067 n = buf_size - 7 * avctx->channels;
1070 block_predictor[0] = av_clip(*src++, 0, 6);
1071 block_predictor[1] = 0;
1073 block_predictor[1] = av_clip(*src++, 0, 6);
1074 c->status[0].idelta = (int16_t)bytestream_get_le16(&src);
1076 c->status[1].idelta = (int16_t)bytestream_get_le16(&src);
1078 c->status[0].coeff1 = AdaptCoeff1[block_predictor[0]];
1079 c->status[0].coeff2 = AdaptCoeff2[block_predictor[0]];
1080 c->status[1].coeff1 = AdaptCoeff1[block_predictor[1]];
1081 c->status[1].coeff2 = AdaptCoeff2[block_predictor[1]];
1083 c->status[0].sample1 = bytestream_get_le16(&src);
1084 if (st) c->status[1].sample1 = bytestream_get_le16(&src);
1085 c->status[0].sample2 = bytestream_get_le16(&src);
1086 if (st) c->status[1].sample2 = bytestream_get_le16(&src);
1088 *samples++ = c->status[0].sample2;
1089 if (st) *samples++ = c->status[1].sample2;
1090 *samples++ = c->status[0].sample1;
1091 if (st) *samples++ = c->status[1].sample1;
1093 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], src[0] >> 4 );
1094 *samples++ = adpcm_ms_expand_nibble(&c->status[st], src[0] & 0x0F);
1098 case CODEC_ID_ADPCM_IMA_DK4:
1099 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1100 buf_size = avctx->block_align;
1102 c->status[0].predictor = (int16_t)bytestream_get_le16(&src);
1103 c->status[0].step_index = *src++;
1105 *samples++ = c->status[0].predictor;
1107 c->status[1].predictor = (int16_t)bytestream_get_le16(&src);
1108 c->status[1].step_index = *src++;
1110 *samples++ = c->status[1].predictor;
1112 while (src < buf + buf_size) {
1114 /* take care of the top nibble (always left or mono channel) */
1115 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1118 /* take care of the bottom nibble, which is right sample for
1119 * stereo, or another mono sample */
1121 *samples++ = adpcm_ima_expand_nibble(&c->status[1],
1124 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1130 case CODEC_ID_ADPCM_IMA_DK3:
1131 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1132 buf_size = avctx->block_align;
1134 if(buf_size + 16 > (samples_end - samples)*3/8)
1137 c->status[0].predictor = (int16_t)AV_RL16(src + 10);
1138 c->status[1].predictor = (int16_t)AV_RL16(src + 12);
1139 c->status[0].step_index = src[14];
1140 c->status[1].step_index = src[15];
1141 /* sign extend the predictors */
1143 diff_channel = c->status[1].predictor;
1145 /* the DK3_GET_NEXT_NIBBLE macro issues the break statement when
1146 * the buffer is consumed */
1149 /* for this algorithm, c->status[0] is the sum channel and
1150 * c->status[1] is the diff channel */
1152 /* process the first predictor of the sum channel */
1153 DK3_GET_NEXT_NIBBLE();
1154 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1156 /* process the diff channel predictor */
1157 DK3_GET_NEXT_NIBBLE();
1158 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
1160 /* process the first pair of stereo PCM samples */
1161 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1162 *samples++ = c->status[0].predictor + c->status[1].predictor;
1163 *samples++ = c->status[0].predictor - c->status[1].predictor;
1165 /* process the second predictor of the sum channel */
1166 DK3_GET_NEXT_NIBBLE();
1167 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1169 /* process the second pair of stereo PCM samples */
1170 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1171 *samples++ = c->status[0].predictor + c->status[1].predictor;
1172 *samples++ = c->status[0].predictor - c->status[1].predictor;
1175 case CODEC_ID_ADPCM_IMA_ISS:
1176 c->status[0].predictor = (int16_t)AV_RL16(src + 0);
1177 c->status[0].step_index = src[2];
1180 c->status[1].predictor = (int16_t)AV_RL16(src + 0);
1181 c->status[1].step_index = src[2];
1185 while (src < buf + buf_size) {
1188 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1190 *samples++ = adpcm_ima_expand_nibble(&c->status[1],
1193 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1195 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1202 case CODEC_ID_ADPCM_IMA_WS:
1203 /* no per-block initialization; just start decoding the data */
1204 while (src < buf + buf_size) {
1207 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1209 *samples++ = adpcm_ima_expand_nibble(&c->status[1],
1212 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1214 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1221 case CODEC_ID_ADPCM_XA:
1222 while (buf_size >= 128) {
1223 xa_decode(samples, src, &c->status[0], &c->status[1],
1230 case CODEC_ID_ADPCM_IMA_EA_EACS:
1231 samples_in_chunk = bytestream_get_le32(&src) >> (1-st);
1233 if (samples_in_chunk > buf_size-4-(8<<st)) {
1234 src += buf_size - 4;
1238 for (i=0; i<=st; i++)
1239 c->status[i].step_index = bytestream_get_le32(&src);
1240 for (i=0; i<=st; i++)
1241 c->status[i].predictor = bytestream_get_le32(&src);
1243 for (; samples_in_chunk; samples_in_chunk--, src++) {
1244 *samples++ = adpcm_ima_expand_nibble(&c->status[0], *src>>4, 3);
1245 *samples++ = adpcm_ima_expand_nibble(&c->status[st], *src&0x0F, 3);
1248 case CODEC_ID_ADPCM_IMA_EA_SEAD:
1249 for (; src < buf+buf_size; src++) {
1250 *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[0] >> 4, 6);
1251 *samples++ = adpcm_ima_expand_nibble(&c->status[st],src[0]&0x0F, 6);
1254 case CODEC_ID_ADPCM_EA:
1255 if (buf_size < 4 || AV_RL32(src) >= ((buf_size - 12) * 2)) {
1259 samples_in_chunk = AV_RL32(src);
1261 current_left_sample = (int16_t)bytestream_get_le16(&src);
1262 previous_left_sample = (int16_t)bytestream_get_le16(&src);
1263 current_right_sample = (int16_t)bytestream_get_le16(&src);
1264 previous_right_sample = (int16_t)bytestream_get_le16(&src);
1266 for (count1 = 0; count1 < samples_in_chunk/28;count1++) {
1267 coeff1l = ea_adpcm_table[ *src >> 4 ];
1268 coeff2l = ea_adpcm_table[(*src >> 4 ) + 4];
1269 coeff1r = ea_adpcm_table[*src & 0x0F];
1270 coeff2r = ea_adpcm_table[(*src & 0x0F) + 4];
1273 shift_left = (*src >> 4 ) + 8;
1274 shift_right = (*src & 0x0F) + 8;
1277 for (count2 = 0; count2 < 28; count2++) {
1278 next_left_sample = (int32_t)((*src & 0xF0) << 24) >> shift_left;
1279 next_right_sample = (int32_t)((*src & 0x0F) << 28) >> shift_right;
1282 next_left_sample = (next_left_sample +
1283 (current_left_sample * coeff1l) +
1284 (previous_left_sample * coeff2l) + 0x80) >> 8;
1285 next_right_sample = (next_right_sample +
1286 (current_right_sample * coeff1r) +
1287 (previous_right_sample * coeff2r) + 0x80) >> 8;
1289 previous_left_sample = current_left_sample;
1290 current_left_sample = av_clip_int16(next_left_sample);
1291 previous_right_sample = current_right_sample;
1292 current_right_sample = av_clip_int16(next_right_sample);
1293 *samples++ = (unsigned short)current_left_sample;
1294 *samples++ = (unsigned short)current_right_sample;
1298 if (src - buf == buf_size - 2)
1299 src += 2; // Skip terminating 0x0000
1302 case CODEC_ID_ADPCM_EA_MAXIS_XA:
1303 for(channel = 0; channel < avctx->channels; channel++) {
1305 coeff[channel][i] = ea_adpcm_table[(*src >> 4) + 4*i];
1306 shift[channel] = (*src & 0x0F) + 8;
1309 for (count1 = 0; count1 < (buf_size - avctx->channels) / avctx->channels; count1++) {
1310 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1311 for(channel = 0; channel < avctx->channels; channel++) {
1312 int32_t sample = (int32_t)(((*(src+channel) >> i) & 0x0F) << 0x1C) >> shift[channel];
1314 c->status[channel].sample1 * coeff[channel][0] +
1315 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1316 c->status[channel].sample2 = c->status[channel].sample1;
1317 c->status[channel].sample1 = av_clip_int16(sample);
1318 *samples++ = c->status[channel].sample1;
1321 src+=avctx->channels;
1324 case CODEC_ID_ADPCM_EA_R1:
1325 case CODEC_ID_ADPCM_EA_R2:
1326 case CODEC_ID_ADPCM_EA_R3: {
1327 /* channel numbering
1329 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1330 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1331 const int big_endian = avctx->codec->id == CODEC_ID_ADPCM_EA_R3;
1332 int32_t previous_sample, current_sample, next_sample;
1333 int32_t coeff1, coeff2;
1335 unsigned int channel;
1337 const uint8_t *srcC;
1338 const uint8_t *src_end = buf + buf_size;
1340 samples_in_chunk = (big_endian ? bytestream_get_be32(&src)
1341 : bytestream_get_le32(&src)) / 28;
1342 if (samples_in_chunk > UINT32_MAX/(28*avctx->channels) ||
1343 28*samples_in_chunk*avctx->channels > samples_end-samples) {
1344 src += buf_size - 4;
1348 for (channel=0; channel<avctx->channels; channel++) {
1349 int32_t offset = (big_endian ? bytestream_get_be32(&src)
1350 : bytestream_get_le32(&src))
1351 + (avctx->channels-channel-1) * 4;
1353 if ((offset < 0) || (offset >= src_end - src - 4)) break;
1354 srcC = src + offset;
1355 samplesC = samples + channel;
1357 if (avctx->codec->id == CODEC_ID_ADPCM_EA_R1) {
1358 current_sample = (int16_t)bytestream_get_le16(&srcC);
1359 previous_sample = (int16_t)bytestream_get_le16(&srcC);
1361 current_sample = c->status[channel].predictor;
1362 previous_sample = c->status[channel].prev_sample;
1365 for (count1=0; count1<samples_in_chunk; count1++) {
1366 if (*srcC == 0xEE) { /* only seen in R2 and R3 */
1368 if (srcC > src_end - 30*2) break;
1369 current_sample = (int16_t)bytestream_get_be16(&srcC);
1370 previous_sample = (int16_t)bytestream_get_be16(&srcC);
1372 for (count2=0; count2<28; count2++) {
1373 *samplesC = (int16_t)bytestream_get_be16(&srcC);
1374 samplesC += avctx->channels;
1377 coeff1 = ea_adpcm_table[ *srcC>>4 ];
1378 coeff2 = ea_adpcm_table[(*srcC>>4) + 4];
1379 shift = (*srcC++ & 0x0F) + 8;
1381 if (srcC > src_end - 14) break;
1382 for (count2=0; count2<28; count2++) {
1384 next_sample = (int32_t)((*srcC++ & 0x0F) << 28) >> shift;
1386 next_sample = (int32_t)((*srcC & 0xF0) << 24) >> shift;
1388 next_sample += (current_sample * coeff1) +
1389 (previous_sample * coeff2);
1390 next_sample = av_clip_int16(next_sample >> 8);
1392 previous_sample = current_sample;
1393 current_sample = next_sample;
1394 *samplesC = current_sample;
1395 samplesC += avctx->channels;
1400 if (avctx->codec->id != CODEC_ID_ADPCM_EA_R1) {
1401 c->status[channel].predictor = current_sample;
1402 c->status[channel].prev_sample = previous_sample;
1406 src = src + buf_size - (4 + 4*avctx->channels);
1407 samples += 28 * samples_in_chunk * avctx->channels;
1410 case CODEC_ID_ADPCM_EA_XAS:
1411 if (samples_end-samples < 32*4*avctx->channels
1412 || buf_size < (4+15)*4*avctx->channels) {
1416 for (channel=0; channel<avctx->channels; channel++) {
1417 int coeff[2][4], shift[4];
1418 short *s2, *s = &samples[channel];
1419 for (n=0; n<4; n++, s+=32*avctx->channels) {
1421 coeff[i][n] = ea_adpcm_table[(src[0]&0x0F)+4*i];
1422 shift[n] = (src[2]&0x0F) + 8;
1423 for (s2=s, i=0; i<2; i++, src+=2, s2+=avctx->channels)
1424 s2[0] = (src[0]&0xF0) + (src[1]<<8);
1427 for (m=2; m<32; m+=2) {
1428 s = &samples[m*avctx->channels + channel];
1429 for (n=0; n<4; n++, src++, s+=32*avctx->channels) {
1430 for (s2=s, i=0; i<8; i+=4, s2+=avctx->channels) {
1431 int level = (int32_t)((*src & (0xF0>>i)) << (24+i)) >> shift[n];
1432 int pred = s2[-1*avctx->channels] * coeff[0][n]
1433 + s2[-2*avctx->channels] * coeff[1][n];
1434 s2[0] = av_clip_int16((level + pred + 0x80) >> 8);
1439 samples += 32*4*avctx->channels;
1441 case CODEC_ID_ADPCM_IMA_AMV:
1442 case CODEC_ID_ADPCM_IMA_SMJPEG:
1443 c->status[0].predictor = (int16_t)bytestream_get_le16(&src);
1444 c->status[0].step_index = bytestream_get_le16(&src);
1446 if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV)
1449 while (src < buf + buf_size) {
1454 if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV)
1455 FFSWAP(char, hi, lo);
1457 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1459 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1464 case CODEC_ID_ADPCM_CT:
1465 while (src < buf + buf_size) {
1467 *samples++ = adpcm_ct_expand_nibble(&c->status[0],
1469 *samples++ = adpcm_ct_expand_nibble(&c->status[1],
1472 *samples++ = adpcm_ct_expand_nibble(&c->status[0],
1474 *samples++ = adpcm_ct_expand_nibble(&c->status[0],
1480 case CODEC_ID_ADPCM_SBPRO_4:
1481 case CODEC_ID_ADPCM_SBPRO_3:
1482 case CODEC_ID_ADPCM_SBPRO_2:
1483 if (!c->status[0].step_index) {
1484 /* the first byte is a raw sample */
1485 *samples++ = 128 * (*src++ - 0x80);
1487 *samples++ = 128 * (*src++ - 0x80);
1488 c->status[0].step_index = 1;
1490 if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_4) {
1491 while (src < buf + buf_size) {
1492 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1494 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1495 src[0] & 0x0F, 4, 0);
1498 } else if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_3) {
1499 while (src < buf + buf_size && samples + 2 < samples_end) {
1500 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1501 src[0] >> 5 , 3, 0);
1502 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1503 (src[0] >> 2) & 0x07, 3, 0);
1504 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1505 src[0] & 0x03, 2, 0);
1509 while (src < buf + buf_size && samples + 3 < samples_end) {
1510 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1511 src[0] >> 6 , 2, 2);
1512 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1513 (src[0] >> 4) & 0x03, 2, 2);
1514 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1515 (src[0] >> 2) & 0x03, 2, 2);
1516 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1517 src[0] & 0x03, 2, 2);
1522 case CODEC_ID_ADPCM_SWF:
1526 int k0, signmask, nb_bits, count;
1527 int size = buf_size*8;
1529 init_get_bits(&gb, buf, size);
1531 //read bits & initial values
1532 nb_bits = get_bits(&gb, 2)+2;
1533 //av_log(NULL,AV_LOG_INFO,"nb_bits: %d\n", nb_bits);
1534 table = swf_index_tables[nb_bits-2];
1535 k0 = 1 << (nb_bits-2);
1536 signmask = 1 << (nb_bits-1);
1538 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
1539 for (i = 0; i < avctx->channels; i++) {
1540 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
1541 c->status[i].step_index = get_bits(&gb, 6);
1544 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
1547 for (i = 0; i < avctx->channels; i++) {
1548 // similar to IMA adpcm
1549 int delta = get_bits(&gb, nb_bits);
1550 int step = step_table[c->status[i].step_index];
1551 long vpdiff = 0; // vpdiff = (delta+0.5)*step/4
1562 if (delta & signmask)
1563 c->status[i].predictor -= vpdiff;
1565 c->status[i].predictor += vpdiff;
1567 c->status[i].step_index += table[delta & (~signmask)];
1569 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
1570 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
1572 *samples++ = c->status[i].predictor;
1573 if (samples >= samples_end) {
1574 av_log(avctx, AV_LOG_ERROR, "allocated output buffer is too small\n");
1583 case CODEC_ID_ADPCM_YAMAHA:
1584 while (src < buf + buf_size) {
1586 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
1588 *samples++ = adpcm_yamaha_expand_nibble(&c->status[1],
1591 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
1593 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
1599 case CODEC_ID_ADPCM_THP:
1602 unsigned int samplecnt;
1606 if (buf_size < 80) {
1607 av_log(avctx, AV_LOG_ERROR, "frame too small\n");
1612 samplecnt = bytestream_get_be32(&src);
1614 for (i = 0; i < 32; i++)
1615 table[0][i] = (int16_t)bytestream_get_be16(&src);
1617 /* Initialize the previous sample. */
1618 for (i = 0; i < 4; i++)
1619 prev[0][i] = (int16_t)bytestream_get_be16(&src);
1621 if (samplecnt >= (samples_end - samples) / (st + 1)) {
1622 av_log(avctx, AV_LOG_ERROR, "allocated output buffer is too small\n");
1626 for (ch = 0; ch <= st; ch++) {
1627 samples = (unsigned short *) data + ch;
1629 /* Read in every sample for this channel. */
1630 for (i = 0; i < samplecnt / 14; i++) {
1631 int index = (*src >> 4) & 7;
1632 unsigned int exp = 28 - (*src++ & 15);
1633 int factor1 = table[ch][index * 2];
1634 int factor2 = table[ch][index * 2 + 1];
1636 /* Decode 14 samples. */
1637 for (n = 0; n < 14; n++) {
1639 if(n&1) sampledat= *src++ <<28;
1640 else sampledat= (*src&0xF0)<<24;
1642 sampledat = ((prev[ch][0]*factor1
1643 + prev[ch][1]*factor2) >> 11) + (sampledat>>exp);
1644 *samples = av_clip_int16(sampledat);
1645 prev[ch][1] = prev[ch][0];
1646 prev[ch][0] = *samples++;
1648 /* In case of stereo, skip one sample, this sample
1649 is for the other channel. */
1655 /* In the previous loop, in case stereo is used, samples is
1656 increased exactly one time too often. */
1664 *data_size = (uint8_t *)samples - (uint8_t *)data;
1671 #define ADPCM_ENCODER(id,name,long_name_) \
1672 AVCodec name ## _encoder = { \
1674 AVMEDIA_TYPE_AUDIO, \
1676 sizeof(ADPCMContext), \
1677 adpcm_encode_init, \
1678 adpcm_encode_frame, \
1679 adpcm_encode_close, \
1681 .sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE}, \
1682 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1685 #define ADPCM_ENCODER(id,name,long_name_)
1689 #define ADPCM_DECODER(id,name,long_name_) \
1690 AVCodec name ## _decoder = { \
1692 AVMEDIA_TYPE_AUDIO, \
1694 sizeof(ADPCMContext), \
1695 adpcm_decode_init, \
1698 adpcm_decode_frame, \
1699 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1702 #define ADPCM_DECODER(id,name,long_name_)
1705 #define ADPCM_CODEC(id,name,long_name_) \
1706 ADPCM_ENCODER(id,name,long_name_) ADPCM_DECODER(id,name,long_name_)
1708 /* Note: Do not forget to add new entries to the Makefile as well. */
1709 ADPCM_DECODER(CODEC_ID_ADPCM_4XM, adpcm_4xm, "ADPCM 4X Movie");
1710 ADPCM_DECODER(CODEC_ID_ADPCM_CT, adpcm_ct, "ADPCM Creative Technology");
1711 ADPCM_DECODER(CODEC_ID_ADPCM_EA, adpcm_ea, "ADPCM Electronic Arts");
1712 ADPCM_DECODER(CODEC_ID_ADPCM_EA_MAXIS_XA, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
1713 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R1, adpcm_ea_r1, "ADPCM Electronic Arts R1");
1714 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R2, adpcm_ea_r2, "ADPCM Electronic Arts R2");
1715 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R3, adpcm_ea_r3, "ADPCM Electronic Arts R3");
1716 ADPCM_DECODER(CODEC_ID_ADPCM_EA_XAS, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
1717 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv, "ADPCM IMA AMV");
1718 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
1719 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
1720 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
1721 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
1722 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_ISS, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
1723 ADPCM_CODEC (CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt, "ADPCM IMA QuickTime");
1724 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
1725 ADPCM_CODEC (CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav, "ADPCM IMA WAV");
1726 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws, "ADPCM IMA Westwood");
1727 ADPCM_CODEC (CODEC_ID_ADPCM_MS, adpcm_ms, "ADPCM Microsoft");
1728 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
1729 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
1730 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
1731 ADPCM_CODEC (CODEC_ID_ADPCM_SWF, adpcm_swf, "ADPCM Shockwave Flash");
1732 ADPCM_DECODER(CODEC_ID_ADPCM_THP, adpcm_thp, "ADPCM Nintendo Gamecube THP");
1733 ADPCM_DECODER(CODEC_ID_ADPCM_XA, adpcm_xa, "ADPCM CDROM XA");
1734 ADPCM_CODEC (CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha, "ADPCM Yamaha");