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];
356 memset(nodes_next, 0, frontier*sizeof(TrellisNode*));
357 for(j=0; j<frontier && nodes[j]; j++) {
358 // higher j have higher ssd already, so they're likely to yield a suboptimal next sample too
359 const int range = (j < frontier/2) ? 1 : 0;
360 const int step = nodes[j]->step;
362 if(version == CODEC_ID_ADPCM_MS) {
363 const int predictor = ((nodes[j]->sample1 * c->coeff1) + (nodes[j]->sample2 * c->coeff2)) / 64;
364 const int div = (sample - predictor) / step;
365 const int nmin = av_clip(div-range, -8, 6);
366 const int nmax = av_clip(div+range, -7, 7);
367 for(nidx=nmin; nidx<=nmax; nidx++) {
368 const int nibble = nidx & 0xf;
369 int dec_sample = predictor + nidx * step;
370 #define STORE_NODE(NAME, STEP_INDEX)\
375 dec_sample = av_clip_int16(dec_sample);\
376 d = sample - dec_sample;\
377 ssd = nodes[j]->ssd + d*d;\
378 /* Collapse any two states with the same previous sample value. \
379 * One could also distinguish states by step and by 2nd to last
380 * sample, but the effects of that are negligible. */\
381 for(k=0; k<frontier && nodes_next[k]; k++) {\
382 if(dec_sample == nodes_next[k]->sample1) {\
383 assert(ssd >= nodes_next[k]->ssd);\
387 if (heap_pos < frontier) {\
390 /* Try to replace one of the leaf nodes with the new \
391 * one, but try a different slot each time. */\
392 pos = (frontier >> 1) + (heap_pos++ & ((frontier >> 1) - 1));\
393 if (ssd > nodes_next[pos]->ssd)\
396 u = nodes_next[pos];\
398 assert(pathn < FREEZE_INTERVAL<<avctx->trellis);\
400 nodes_next[pos] = u;\
404 u->step = STEP_INDEX;\
405 u->sample2 = nodes[j]->sample1;\
406 u->sample1 = dec_sample;\
407 paths[u->path].nibble = nibble;\
408 paths[u->path].prev = nodes[j]->path;\
409 /* Sift the newly inserted node down in the heap to \
410 * restore the heap property. */\
412 int parent = (pos - 1) >> 1;\
413 if (nodes_next[parent]->ssd <= ssd)\
415 FFSWAP(TrellisNode*, nodes_next[parent], nodes_next[pos]);\
419 STORE_NODE(ms, FFMAX(16, (AdaptationTable[nibble] * step) >> 8));
421 } else if((version == CODEC_ID_ADPCM_IMA_WAV)|| (version == CODEC_ID_ADPCM_IMA_QT)|| (version == CODEC_ID_ADPCM_SWF)) {
422 #define LOOP_NODES(NAME, STEP_TABLE, STEP_INDEX)\
423 const int predictor = nodes[j]->sample1;\
424 const int div = (sample - predictor) * 4 / STEP_TABLE;\
425 int nmin = av_clip(div-range, -7, 6);\
426 int nmax = av_clip(div+range, -6, 7);\
427 if(nmin<=0) nmin--; /* distinguish -0 from +0 */\
429 for(nidx=nmin; nidx<=nmax; nidx++) {\
430 const int nibble = nidx<0 ? 7-nidx : nidx;\
431 int dec_sample = predictor + (STEP_TABLE * yamaha_difflookup[nibble]) / 8;\
432 STORE_NODE(NAME, STEP_INDEX);\
434 LOOP_NODES(ima, step_table[step], av_clip(step + index_table[nibble], 0, 88));
435 } else { //CODEC_ID_ADPCM_YAMAHA
436 LOOP_NODES(yamaha, step, av_clip((step * yamaha_indexscale[nibble]) >> 8, 127, 24567));
447 if(nodes[0]->ssd > (1<<28)) {
448 for(j=1; j<frontier && nodes[j]; j++)
449 nodes[j]->ssd -= nodes[0]->ssd;
453 // merge old paths to save memory
454 if(i == froze + FREEZE_INTERVAL) {
455 p = &paths[nodes[0]->path];
456 for(k=i; k>froze; k--) {
462 // other nodes might use paths that don't coincide with the frozen one.
463 // checking which nodes do so is too slow, so just kill them all.
464 // this also slightly improves quality, but I don't know why.
465 memset(nodes+1, 0, (frontier-1)*sizeof(TrellisNode*));
469 p = &paths[nodes[0]->path];
470 for(i=n-1; i>froze; i--) {
475 c->predictor = nodes[0]->sample1;
476 c->sample1 = nodes[0]->sample1;
477 c->sample2 = nodes[0]->sample2;
478 c->step_index = nodes[0]->step;
479 c->step = nodes[0]->step;
480 c->idelta = nodes[0]->step;
483 static int adpcm_encode_frame(AVCodecContext *avctx,
484 unsigned char *frame, int buf_size, void *data)
489 ADPCMContext *c = avctx->priv_data;
493 samples = (short *)data;
494 st= avctx->channels == 2;
495 /* n = (BLKSIZE - 4 * avctx->channels) / (2 * 8 * avctx->channels); */
497 switch(avctx->codec->id) {
498 case CODEC_ID_ADPCM_IMA_WAV:
499 n = avctx->frame_size / 8;
500 c->status[0].prev_sample = (signed short)samples[0]; /* XXX */
501 /* c->status[0].step_index = 0; *//* XXX: not sure how to init the state machine */
502 bytestream_put_le16(&dst, c->status[0].prev_sample);
503 *dst++ = (unsigned char)c->status[0].step_index;
504 *dst++ = 0; /* unknown */
506 if (avctx->channels == 2) {
507 c->status[1].prev_sample = (signed short)samples[0];
508 /* c->status[1].step_index = 0; */
509 bytestream_put_le16(&dst, c->status[1].prev_sample);
510 *dst++ = (unsigned char)c->status[1].step_index;
515 /* stereo: 4 bytes (8 samples) for left, 4 bytes for right, 4 bytes left, ... */
516 if(avctx->trellis > 0) {
517 FF_ALLOC_OR_GOTO(avctx, buf, 2*n*8, error);
518 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n*8);
519 if(avctx->channels == 2)
520 adpcm_compress_trellis(avctx, samples+1, buf + n*8, &c->status[1], n*8);
522 *dst++ = buf[8*i+0] | (buf[8*i+1] << 4);
523 *dst++ = buf[8*i+2] | (buf[8*i+3] << 4);
524 *dst++ = buf[8*i+4] | (buf[8*i+5] << 4);
525 *dst++ = buf[8*i+6] | (buf[8*i+7] << 4);
526 if (avctx->channels == 2) {
527 uint8_t *buf1 = buf + n*8;
528 *dst++ = buf1[8*i+0] | (buf1[8*i+1] << 4);
529 *dst++ = buf1[8*i+2] | (buf1[8*i+3] << 4);
530 *dst++ = buf1[8*i+4] | (buf1[8*i+5] << 4);
531 *dst++ = buf1[8*i+6] | (buf1[8*i+7] << 4);
537 *dst = adpcm_ima_compress_sample(&c->status[0], samples[0]);
538 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels]) << 4;
540 *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 2]);
541 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 3]) << 4;
543 *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 4]);
544 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 5]) << 4;
546 *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 6]);
547 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 7]) << 4;
550 if (avctx->channels == 2) {
551 *dst = adpcm_ima_compress_sample(&c->status[1], samples[1]);
552 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[3]) << 4;
554 *dst = adpcm_ima_compress_sample(&c->status[1], samples[5]);
555 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[7]) << 4;
557 *dst = adpcm_ima_compress_sample(&c->status[1], samples[9]);
558 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[11]) << 4;
560 *dst = adpcm_ima_compress_sample(&c->status[1], samples[13]);
561 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[15]) << 4;
564 samples += 8 * avctx->channels;
567 case CODEC_ID_ADPCM_IMA_QT:
571 init_put_bits(&pb, dst, buf_size*8);
573 for(ch=0; ch<avctx->channels; ch++){
574 put_bits(&pb, 9, (c->status[ch].prev_sample + 0x10000) >> 7);
575 put_bits(&pb, 7, c->status[ch].step_index);
576 if(avctx->trellis > 0) {
578 adpcm_compress_trellis(avctx, samples+ch, buf, &c->status[ch], 64);
580 put_bits(&pb, 4, buf[i^1]);
581 c->status[ch].prev_sample = c->status[ch].predictor & ~0x7F;
583 for (i=0; i<64; i+=2){
585 t1 = adpcm_ima_compress_sample(&c->status[ch], samples[avctx->channels*(i+0)+ch]);
586 t2 = adpcm_ima_compress_sample(&c->status[ch], samples[avctx->channels*(i+1)+ch]);
587 put_bits(&pb, 4, t2);
588 put_bits(&pb, 4, t1);
590 c->status[ch].prev_sample &= ~0x7F;
595 dst += put_bits_count(&pb)>>3;
598 case CODEC_ID_ADPCM_SWF:
602 init_put_bits(&pb, dst, buf_size*8);
604 n = avctx->frame_size-1;
606 //Store AdpcmCodeSize
607 put_bits(&pb, 2, 2); //Set 4bits flash adpcm format
609 //Init the encoder state
610 for(i=0; i<avctx->channels; i++){
611 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 63); // clip step so it fits 6 bits
612 put_sbits(&pb, 16, samples[i]);
613 put_bits(&pb, 6, c->status[i].step_index);
614 c->status[i].prev_sample = (signed short)samples[i];
617 if(avctx->trellis > 0) {
618 FF_ALLOC_OR_GOTO(avctx, buf, 2*n, error);
619 adpcm_compress_trellis(avctx, samples+2, buf, &c->status[0], n);
620 if (avctx->channels == 2)
621 adpcm_compress_trellis(avctx, samples+3, buf+n, &c->status[1], n);
623 put_bits(&pb, 4, buf[i]);
624 if (avctx->channels == 2)
625 put_bits(&pb, 4, buf[n+i]);
629 for (i=1; i<avctx->frame_size; i++) {
630 put_bits(&pb, 4, adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels*i]));
631 if (avctx->channels == 2)
632 put_bits(&pb, 4, adpcm_ima_compress_sample(&c->status[1], samples[2*i+1]));
636 dst += put_bits_count(&pb)>>3;
639 case CODEC_ID_ADPCM_MS:
640 for(i=0; i<avctx->channels; i++){
644 c->status[i].coeff1 = AdaptCoeff1[predictor];
645 c->status[i].coeff2 = AdaptCoeff2[predictor];
647 for(i=0; i<avctx->channels; i++){
648 if (c->status[i].idelta < 16)
649 c->status[i].idelta = 16;
651 bytestream_put_le16(&dst, c->status[i].idelta);
653 for(i=0; i<avctx->channels; i++){
654 c->status[i].sample2= *samples++;
656 for(i=0; i<avctx->channels; i++){
657 c->status[i].sample1= *samples++;
659 bytestream_put_le16(&dst, c->status[i].sample1);
661 for(i=0; i<avctx->channels; i++)
662 bytestream_put_le16(&dst, c->status[i].sample2);
664 if(avctx->trellis > 0) {
665 int n = avctx->block_align - 7*avctx->channels;
666 FF_ALLOC_OR_GOTO(avctx, buf, 2*n, error);
667 if(avctx->channels == 1) {
668 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
670 *dst++ = (buf[i] << 4) | buf[i+1];
672 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
673 adpcm_compress_trellis(avctx, samples+1, buf+n, &c->status[1], n);
675 *dst++ = (buf[i] << 4) | buf[n+i];
679 for(i=7*avctx->channels; i<avctx->block_align; i++) {
681 nibble = adpcm_ms_compress_sample(&c->status[ 0], *samples++)<<4;
682 nibble|= adpcm_ms_compress_sample(&c->status[st], *samples++);
686 case CODEC_ID_ADPCM_YAMAHA:
687 n = avctx->frame_size / 2;
688 if(avctx->trellis > 0) {
689 FF_ALLOC_OR_GOTO(avctx, buf, 2*n*2, error);
691 if(avctx->channels == 1) {
692 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
694 *dst++ = buf[i] | (buf[i+1] << 4);
696 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
697 adpcm_compress_trellis(avctx, samples+1, buf+n, &c->status[1], n);
699 *dst++ = buf[i] | (buf[n+i] << 4);
703 for (n *= avctx->channels; n>0; n--) {
705 nibble = adpcm_yamaha_compress_sample(&c->status[ 0], *samples++);
706 nibble |= adpcm_yamaha_compress_sample(&c->status[st], *samples++) << 4;
716 #endif //CONFIG_ENCODERS
718 static av_cold int adpcm_decode_init(AVCodecContext * avctx)
720 ADPCMContext *c = avctx->priv_data;
721 unsigned int max_channels = 2;
723 switch(avctx->codec->id) {
724 case CODEC_ID_ADPCM_EA_R1:
725 case CODEC_ID_ADPCM_EA_R2:
726 case CODEC_ID_ADPCM_EA_R3:
730 if(avctx->channels > max_channels){
734 switch(avctx->codec->id) {
735 case CODEC_ID_ADPCM_CT:
736 c->status[0].step = c->status[1].step = 511;
738 case CODEC_ID_ADPCM_IMA_WAV:
739 if (avctx->bits_per_coded_sample != 4) {
740 av_log(avctx, AV_LOG_ERROR, "Only 4-bit ADPCM IMA WAV files are supported\n");
744 case CODEC_ID_ADPCM_IMA_WS:
745 if (avctx->extradata && avctx->extradata_size == 2 * 4) {
746 c->status[0].predictor = AV_RL32(avctx->extradata);
747 c->status[1].predictor = AV_RL32(avctx->extradata + 4);
753 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
757 static inline short adpcm_ima_expand_nibble(ADPCMChannelStatus *c, char nibble, int shift)
761 int sign, delta, diff, step;
763 step = step_table[c->step_index];
764 step_index = c->step_index + index_table[(unsigned)nibble];
765 if (step_index < 0) step_index = 0;
766 else if (step_index > 88) step_index = 88;
770 /* perform direct multiplication instead of series of jumps proposed by
771 * the reference ADPCM implementation since modern CPUs can do the mults
773 diff = ((2 * delta + 1) * step) >> shift;
774 predictor = c->predictor;
775 if (sign) predictor -= diff;
776 else predictor += diff;
778 c->predictor = av_clip_int16(predictor);
779 c->step_index = step_index;
781 return (short)c->predictor;
784 static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, char nibble)
788 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
789 predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
791 c->sample2 = c->sample1;
792 c->sample1 = av_clip_int16(predictor);
793 c->idelta = (AdaptationTable[(int)nibble] * c->idelta) >> 8;
794 if (c->idelta < 16) c->idelta = 16;
799 static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
801 int sign, delta, diff;
806 /* perform direct multiplication instead of series of jumps proposed by
807 * the reference ADPCM implementation since modern CPUs can do the mults
809 diff = ((2 * delta + 1) * c->step) >> 3;
810 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
811 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
812 c->predictor = av_clip_int16(c->predictor);
813 /* calculate new step and clamp it to range 511..32767 */
814 new_step = (AdaptationTable[nibble & 7] * c->step) >> 8;
815 c->step = av_clip(new_step, 511, 32767);
817 return (short)c->predictor;
820 static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble, int size, int shift)
822 int sign, delta, diff;
824 sign = nibble & (1<<(size-1));
825 delta = nibble & ((1<<(size-1))-1);
826 diff = delta << (7 + c->step + shift);
829 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
831 /* calculate new step */
832 if (delta >= (2*size - 3) && c->step < 3)
834 else if (delta == 0 && c->step > 0)
837 return (short) c->predictor;
840 static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned char nibble)
847 c->predictor += (c->step * yamaha_difflookup[nibble]) / 8;
848 c->predictor = av_clip_int16(c->predictor);
849 c->step = (c->step * yamaha_indexscale[nibble]) >> 8;
850 c->step = av_clip(c->step, 127, 24567);
854 static void xa_decode(short *out, const unsigned char *in,
855 ADPCMChannelStatus *left, ADPCMChannelStatus *right, int inc)
858 int shift,filter,f0,f1;
864 shift = 12 - (in[4+i*2] & 15);
865 filter = in[4+i*2] >> 4;
866 f0 = xa_adpcm_table[filter][0];
867 f1 = xa_adpcm_table[filter][1];
875 t = (signed char)(d<<4)>>4;
876 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
878 s_1 = av_clip_int16(s);
883 if (inc==2) { /* stereo */
886 s_1 = right->sample1;
887 s_2 = right->sample2;
888 out = out + 1 - 28*2;
891 shift = 12 - (in[5+i*2] & 15);
892 filter = in[5+i*2] >> 4;
894 f0 = xa_adpcm_table[filter][0];
895 f1 = xa_adpcm_table[filter][1];
900 t = (signed char)d >> 4;
901 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
903 s_1 = av_clip_int16(s);
908 if (inc==2) { /* stereo */
909 right->sample1 = s_1;
910 right->sample2 = s_2;
920 /* DK3 ADPCM support macro */
921 #define DK3_GET_NEXT_NIBBLE() \
922 if (decode_top_nibble_next) \
924 nibble = last_byte >> 4; \
925 decode_top_nibble_next = 0; \
929 last_byte = *src++; \
930 if (src >= buf + buf_size) break; \
931 nibble = last_byte & 0x0F; \
932 decode_top_nibble_next = 1; \
935 static int adpcm_decode_frame(AVCodecContext *avctx,
936 void *data, int *data_size,
939 const uint8_t *buf = avpkt->data;
940 int buf_size = avpkt->size;
941 ADPCMContext *c = avctx->priv_data;
942 ADPCMChannelStatus *cs;
943 int n, m, channel, i;
944 int block_predictor[2];
950 /* DK3 ADPCM accounting variables */
951 unsigned char last_byte = 0;
952 unsigned char nibble;
953 int decode_top_nibble_next = 0;
956 /* EA ADPCM state variables */
957 uint32_t samples_in_chunk;
958 int32_t previous_left_sample, previous_right_sample;
959 int32_t current_left_sample, current_right_sample;
960 int32_t next_left_sample, next_right_sample;
961 int32_t coeff1l, coeff2l, coeff1r, coeff2r;
962 uint8_t shift_left, shift_right;
964 int coeff[2][2], shift[2];//used in EA MAXIS ADPCM
969 //should protect all 4bit ADPCM variants
970 //8 is needed for CODEC_ID_ADPCM_IMA_WAV with 2 channels
972 if(*data_size/4 < buf_size + 8)
976 samples_end= samples + *data_size/2;
980 st = avctx->channels == 2 ? 1 : 0;
982 switch(avctx->codec->id) {
983 case CODEC_ID_ADPCM_IMA_QT:
984 n = buf_size - 2*avctx->channels;
985 for (channel = 0; channel < avctx->channels; channel++) {
986 cs = &(c->status[channel]);
987 /* (pppppp) (piiiiiii) */
989 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
990 cs->predictor = (*src++) << 8;
991 cs->predictor |= (*src & 0x80);
992 cs->predictor &= 0xFF80;
995 if(cs->predictor & 0x8000)
996 cs->predictor -= 0x10000;
998 cs->predictor = av_clip_int16(cs->predictor);
1000 cs->step_index = (*src++) & 0x7F;
1002 if (cs->step_index > 88){
1003 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", cs->step_index);
1004 cs->step_index = 88;
1007 cs->step = step_table[cs->step_index];
1009 samples = (short*)data + channel;
1011 for(m=32; n>0 && m>0; n--, m--) { /* in QuickTime, IMA is encoded by chuncks of 34 bytes (=64 samples) */
1012 *samples = adpcm_ima_expand_nibble(cs, src[0] & 0x0F, 3);
1013 samples += avctx->channels;
1014 *samples = adpcm_ima_expand_nibble(cs, src[0] >> 4 , 3);
1015 samples += avctx->channels;
1022 case CODEC_ID_ADPCM_IMA_WAV:
1023 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1024 buf_size = avctx->block_align;
1026 // samples_per_block= (block_align-4*chanels)*8 / (bits_per_sample * chanels) + 1;
1028 for(i=0; i<avctx->channels; i++){
1029 cs = &(c->status[i]);
1030 cs->predictor = *samples++ = (int16_t)bytestream_get_le16(&src);
1032 cs->step_index = *src++;
1033 if (cs->step_index > 88){
1034 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", cs->step_index);
1035 cs->step_index = 88;
1037 if (*src++) av_log(avctx, AV_LOG_ERROR, "unused byte should be null but is %d!!\n", src[-1]); /* unused */
1040 while(src < buf + buf_size){
1042 for(i=0; i<=st; i++)
1043 *samples++ = adpcm_ima_expand_nibble(&c->status[i], src[4*i] & 0x0F, 3);
1044 for(i=0; i<=st; i++)
1045 *samples++ = adpcm_ima_expand_nibble(&c->status[i], src[4*i] >> 4 , 3);
1051 case CODEC_ID_ADPCM_4XM:
1052 cs = &(c->status[0]);
1053 c->status[0].predictor= (int16_t)bytestream_get_le16(&src);
1055 c->status[1].predictor= (int16_t)bytestream_get_le16(&src);
1057 c->status[0].step_index= (int16_t)bytestream_get_le16(&src);
1059 c->status[1].step_index= (int16_t)bytestream_get_le16(&src);
1061 if (cs->step_index < 0) cs->step_index = 0;
1062 if (cs->step_index > 88) cs->step_index = 88;
1064 m= (buf_size - (src - buf))>>st;
1065 for(i=0; i<m; i++) {
1066 *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[i] & 0x0F, 4);
1068 *samples++ = adpcm_ima_expand_nibble(&c->status[1], src[i+m] & 0x0F, 4);
1069 *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[i] >> 4, 4);
1071 *samples++ = adpcm_ima_expand_nibble(&c->status[1], src[i+m] >> 4, 4);
1077 case CODEC_ID_ADPCM_MS:
1078 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1079 buf_size = avctx->block_align;
1080 n = buf_size - 7 * avctx->channels;
1083 block_predictor[0] = av_clip(*src++, 0, 6);
1084 block_predictor[1] = 0;
1086 block_predictor[1] = av_clip(*src++, 0, 6);
1087 c->status[0].idelta = (int16_t)bytestream_get_le16(&src);
1089 c->status[1].idelta = (int16_t)bytestream_get_le16(&src);
1091 c->status[0].coeff1 = AdaptCoeff1[block_predictor[0]];
1092 c->status[0].coeff2 = AdaptCoeff2[block_predictor[0]];
1093 c->status[1].coeff1 = AdaptCoeff1[block_predictor[1]];
1094 c->status[1].coeff2 = AdaptCoeff2[block_predictor[1]];
1096 c->status[0].sample1 = bytestream_get_le16(&src);
1097 if (st) c->status[1].sample1 = bytestream_get_le16(&src);
1098 c->status[0].sample2 = bytestream_get_le16(&src);
1099 if (st) c->status[1].sample2 = bytestream_get_le16(&src);
1101 *samples++ = c->status[0].sample2;
1102 if (st) *samples++ = c->status[1].sample2;
1103 *samples++ = c->status[0].sample1;
1104 if (st) *samples++ = c->status[1].sample1;
1106 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], src[0] >> 4 );
1107 *samples++ = adpcm_ms_expand_nibble(&c->status[st], src[0] & 0x0F);
1111 case CODEC_ID_ADPCM_IMA_DK4:
1112 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1113 buf_size = avctx->block_align;
1115 c->status[0].predictor = (int16_t)bytestream_get_le16(&src);
1116 c->status[0].step_index = *src++;
1118 *samples++ = c->status[0].predictor;
1120 c->status[1].predictor = (int16_t)bytestream_get_le16(&src);
1121 c->status[1].step_index = *src++;
1123 *samples++ = c->status[1].predictor;
1125 while (src < buf + buf_size) {
1127 /* take care of the top nibble (always left or mono channel) */
1128 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1131 /* take care of the bottom nibble, which is right sample for
1132 * stereo, or another mono sample */
1134 *samples++ = adpcm_ima_expand_nibble(&c->status[1],
1137 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1143 case CODEC_ID_ADPCM_IMA_DK3:
1144 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1145 buf_size = avctx->block_align;
1147 if(buf_size + 16 > (samples_end - samples)*3/8)
1150 c->status[0].predictor = (int16_t)AV_RL16(src + 10);
1151 c->status[1].predictor = (int16_t)AV_RL16(src + 12);
1152 c->status[0].step_index = src[14];
1153 c->status[1].step_index = src[15];
1154 /* sign extend the predictors */
1156 diff_channel = c->status[1].predictor;
1158 /* the DK3_GET_NEXT_NIBBLE macro issues the break statement when
1159 * the buffer is consumed */
1162 /* for this algorithm, c->status[0] is the sum channel and
1163 * c->status[1] is the diff channel */
1165 /* process the first predictor of the sum channel */
1166 DK3_GET_NEXT_NIBBLE();
1167 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1169 /* process the diff channel predictor */
1170 DK3_GET_NEXT_NIBBLE();
1171 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
1173 /* process the first pair of stereo PCM samples */
1174 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1175 *samples++ = c->status[0].predictor + c->status[1].predictor;
1176 *samples++ = c->status[0].predictor - c->status[1].predictor;
1178 /* process the second predictor of the sum channel */
1179 DK3_GET_NEXT_NIBBLE();
1180 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1182 /* process the second pair of stereo PCM samples */
1183 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1184 *samples++ = c->status[0].predictor + c->status[1].predictor;
1185 *samples++ = c->status[0].predictor - c->status[1].predictor;
1188 case CODEC_ID_ADPCM_IMA_ISS:
1189 c->status[0].predictor = (int16_t)AV_RL16(src + 0);
1190 c->status[0].step_index = src[2];
1193 c->status[1].predictor = (int16_t)AV_RL16(src + 0);
1194 c->status[1].step_index = src[2];
1198 while (src < buf + buf_size) {
1201 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1203 *samples++ = adpcm_ima_expand_nibble(&c->status[1],
1206 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1208 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1215 case CODEC_ID_ADPCM_IMA_WS:
1216 /* no per-block initialization; just start decoding the data */
1217 while (src < buf + buf_size) {
1220 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1222 *samples++ = adpcm_ima_expand_nibble(&c->status[1],
1225 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1227 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1234 case CODEC_ID_ADPCM_XA:
1235 while (buf_size >= 128) {
1236 xa_decode(samples, src, &c->status[0], &c->status[1],
1243 case CODEC_ID_ADPCM_IMA_EA_EACS:
1244 samples_in_chunk = bytestream_get_le32(&src) >> (1-st);
1246 if (samples_in_chunk > buf_size-4-(8<<st)) {
1247 src += buf_size - 4;
1251 for (i=0; i<=st; i++)
1252 c->status[i].step_index = bytestream_get_le32(&src);
1253 for (i=0; i<=st; i++)
1254 c->status[i].predictor = bytestream_get_le32(&src);
1256 for (; samples_in_chunk; samples_in_chunk--, src++) {
1257 *samples++ = adpcm_ima_expand_nibble(&c->status[0], *src>>4, 3);
1258 *samples++ = adpcm_ima_expand_nibble(&c->status[st], *src&0x0F, 3);
1261 case CODEC_ID_ADPCM_IMA_EA_SEAD:
1262 for (; src < buf+buf_size; src++) {
1263 *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[0] >> 4, 6);
1264 *samples++ = adpcm_ima_expand_nibble(&c->status[st],src[0]&0x0F, 6);
1267 case CODEC_ID_ADPCM_EA:
1268 if (buf_size < 4 || AV_RL32(src) >= ((buf_size - 12) * 2)) {
1272 samples_in_chunk = AV_RL32(src);
1274 current_left_sample = (int16_t)bytestream_get_le16(&src);
1275 previous_left_sample = (int16_t)bytestream_get_le16(&src);
1276 current_right_sample = (int16_t)bytestream_get_le16(&src);
1277 previous_right_sample = (int16_t)bytestream_get_le16(&src);
1279 for (count1 = 0; count1 < samples_in_chunk/28;count1++) {
1280 coeff1l = ea_adpcm_table[ *src >> 4 ];
1281 coeff2l = ea_adpcm_table[(*src >> 4 ) + 4];
1282 coeff1r = ea_adpcm_table[*src & 0x0F];
1283 coeff2r = ea_adpcm_table[(*src & 0x0F) + 4];
1286 shift_left = (*src >> 4 ) + 8;
1287 shift_right = (*src & 0x0F) + 8;
1290 for (count2 = 0; count2 < 28; count2++) {
1291 next_left_sample = (int32_t)((*src & 0xF0) << 24) >> shift_left;
1292 next_right_sample = (int32_t)((*src & 0x0F) << 28) >> shift_right;
1295 next_left_sample = (next_left_sample +
1296 (current_left_sample * coeff1l) +
1297 (previous_left_sample * coeff2l) + 0x80) >> 8;
1298 next_right_sample = (next_right_sample +
1299 (current_right_sample * coeff1r) +
1300 (previous_right_sample * coeff2r) + 0x80) >> 8;
1302 previous_left_sample = current_left_sample;
1303 current_left_sample = av_clip_int16(next_left_sample);
1304 previous_right_sample = current_right_sample;
1305 current_right_sample = av_clip_int16(next_right_sample);
1306 *samples++ = (unsigned short)current_left_sample;
1307 *samples++ = (unsigned short)current_right_sample;
1311 if (src - buf == buf_size - 2)
1312 src += 2; // Skip terminating 0x0000
1315 case CODEC_ID_ADPCM_EA_MAXIS_XA:
1316 for(channel = 0; channel < avctx->channels; channel++) {
1318 coeff[channel][i] = ea_adpcm_table[(*src >> 4) + 4*i];
1319 shift[channel] = (*src & 0x0F) + 8;
1322 for (count1 = 0; count1 < (buf_size - avctx->channels) / avctx->channels; count1++) {
1323 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1324 for(channel = 0; channel < avctx->channels; channel++) {
1325 int32_t sample = (int32_t)(((*(src+channel) >> i) & 0x0F) << 0x1C) >> shift[channel];
1327 c->status[channel].sample1 * coeff[channel][0] +
1328 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1329 c->status[channel].sample2 = c->status[channel].sample1;
1330 c->status[channel].sample1 = av_clip_int16(sample);
1331 *samples++ = c->status[channel].sample1;
1334 src+=avctx->channels;
1337 case CODEC_ID_ADPCM_EA_R1:
1338 case CODEC_ID_ADPCM_EA_R2:
1339 case CODEC_ID_ADPCM_EA_R3: {
1340 /* channel numbering
1342 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1343 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1344 const int big_endian = avctx->codec->id == CODEC_ID_ADPCM_EA_R3;
1345 int32_t previous_sample, current_sample, next_sample;
1346 int32_t coeff1, coeff2;
1348 unsigned int channel;
1350 const uint8_t *srcC;
1351 const uint8_t *src_end = buf + buf_size;
1353 samples_in_chunk = (big_endian ? bytestream_get_be32(&src)
1354 : bytestream_get_le32(&src)) / 28;
1355 if (samples_in_chunk > UINT32_MAX/(28*avctx->channels) ||
1356 28*samples_in_chunk*avctx->channels > samples_end-samples) {
1357 src += buf_size - 4;
1361 for (channel=0; channel<avctx->channels; channel++) {
1362 int32_t offset = (big_endian ? bytestream_get_be32(&src)
1363 : bytestream_get_le32(&src))
1364 + (avctx->channels-channel-1) * 4;
1366 if ((offset < 0) || (offset >= src_end - src - 4)) break;
1367 srcC = src + offset;
1368 samplesC = samples + channel;
1370 if (avctx->codec->id == CODEC_ID_ADPCM_EA_R1) {
1371 current_sample = (int16_t)bytestream_get_le16(&srcC);
1372 previous_sample = (int16_t)bytestream_get_le16(&srcC);
1374 current_sample = c->status[channel].predictor;
1375 previous_sample = c->status[channel].prev_sample;
1378 for (count1=0; count1<samples_in_chunk; count1++) {
1379 if (*srcC == 0xEE) { /* only seen in R2 and R3 */
1381 if (srcC > src_end - 30*2) break;
1382 current_sample = (int16_t)bytestream_get_be16(&srcC);
1383 previous_sample = (int16_t)bytestream_get_be16(&srcC);
1385 for (count2=0; count2<28; count2++) {
1386 *samplesC = (int16_t)bytestream_get_be16(&srcC);
1387 samplesC += avctx->channels;
1390 coeff1 = ea_adpcm_table[ *srcC>>4 ];
1391 coeff2 = ea_adpcm_table[(*srcC>>4) + 4];
1392 shift = (*srcC++ & 0x0F) + 8;
1394 if (srcC > src_end - 14) break;
1395 for (count2=0; count2<28; count2++) {
1397 next_sample = (int32_t)((*srcC++ & 0x0F) << 28) >> shift;
1399 next_sample = (int32_t)((*srcC & 0xF0) << 24) >> shift;
1401 next_sample += (current_sample * coeff1) +
1402 (previous_sample * coeff2);
1403 next_sample = av_clip_int16(next_sample >> 8);
1405 previous_sample = current_sample;
1406 current_sample = next_sample;
1407 *samplesC = current_sample;
1408 samplesC += avctx->channels;
1413 if (avctx->codec->id != CODEC_ID_ADPCM_EA_R1) {
1414 c->status[channel].predictor = current_sample;
1415 c->status[channel].prev_sample = previous_sample;
1419 src = src + buf_size - (4 + 4*avctx->channels);
1420 samples += 28 * samples_in_chunk * avctx->channels;
1423 case CODEC_ID_ADPCM_EA_XAS:
1424 if (samples_end-samples < 32*4*avctx->channels
1425 || buf_size < (4+15)*4*avctx->channels) {
1429 for (channel=0; channel<avctx->channels; channel++) {
1430 int coeff[2][4], shift[4];
1431 short *s2, *s = &samples[channel];
1432 for (n=0; n<4; n++, s+=32*avctx->channels) {
1434 coeff[i][n] = ea_adpcm_table[(src[0]&0x0F)+4*i];
1435 shift[n] = (src[2]&0x0F) + 8;
1436 for (s2=s, i=0; i<2; i++, src+=2, s2+=avctx->channels)
1437 s2[0] = (src[0]&0xF0) + (src[1]<<8);
1440 for (m=2; m<32; m+=2) {
1441 s = &samples[m*avctx->channels + channel];
1442 for (n=0; n<4; n++, src++, s+=32*avctx->channels) {
1443 for (s2=s, i=0; i<8; i+=4, s2+=avctx->channels) {
1444 int level = (int32_t)((*src & (0xF0>>i)) << (24+i)) >> shift[n];
1445 int pred = s2[-1*avctx->channels] * coeff[0][n]
1446 + s2[-2*avctx->channels] * coeff[1][n];
1447 s2[0] = av_clip_int16((level + pred + 0x80) >> 8);
1452 samples += 32*4*avctx->channels;
1454 case CODEC_ID_ADPCM_IMA_AMV:
1455 case CODEC_ID_ADPCM_IMA_SMJPEG:
1456 c->status[0].predictor = (int16_t)bytestream_get_le16(&src);
1457 c->status[0].step_index = bytestream_get_le16(&src);
1459 if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV)
1462 while (src < buf + buf_size) {
1467 if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV)
1468 FFSWAP(char, hi, lo);
1470 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1472 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1477 case CODEC_ID_ADPCM_CT:
1478 while (src < buf + buf_size) {
1480 *samples++ = adpcm_ct_expand_nibble(&c->status[0],
1482 *samples++ = adpcm_ct_expand_nibble(&c->status[1],
1485 *samples++ = adpcm_ct_expand_nibble(&c->status[0],
1487 *samples++ = adpcm_ct_expand_nibble(&c->status[0],
1493 case CODEC_ID_ADPCM_SBPRO_4:
1494 case CODEC_ID_ADPCM_SBPRO_3:
1495 case CODEC_ID_ADPCM_SBPRO_2:
1496 if (!c->status[0].step_index) {
1497 /* the first byte is a raw sample */
1498 *samples++ = 128 * (*src++ - 0x80);
1500 *samples++ = 128 * (*src++ - 0x80);
1501 c->status[0].step_index = 1;
1503 if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_4) {
1504 while (src < buf + buf_size) {
1505 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1507 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1508 src[0] & 0x0F, 4, 0);
1511 } else if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_3) {
1512 while (src < buf + buf_size && samples + 2 < samples_end) {
1513 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1514 src[0] >> 5 , 3, 0);
1515 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1516 (src[0] >> 2) & 0x07, 3, 0);
1517 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1518 src[0] & 0x03, 2, 0);
1522 while (src < buf + buf_size && samples + 3 < samples_end) {
1523 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1524 src[0] >> 6 , 2, 2);
1525 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1526 (src[0] >> 4) & 0x03, 2, 2);
1527 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1528 (src[0] >> 2) & 0x03, 2, 2);
1529 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1530 src[0] & 0x03, 2, 2);
1535 case CODEC_ID_ADPCM_SWF:
1539 int k0, signmask, nb_bits, count;
1540 int size = buf_size*8;
1542 init_get_bits(&gb, buf, size);
1544 //read bits & initial values
1545 nb_bits = get_bits(&gb, 2)+2;
1546 //av_log(NULL,AV_LOG_INFO,"nb_bits: %d\n", nb_bits);
1547 table = swf_index_tables[nb_bits-2];
1548 k0 = 1 << (nb_bits-2);
1549 signmask = 1 << (nb_bits-1);
1551 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
1552 for (i = 0; i < avctx->channels; i++) {
1553 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
1554 c->status[i].step_index = get_bits(&gb, 6);
1557 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
1560 for (i = 0; i < avctx->channels; i++) {
1561 // similar to IMA adpcm
1562 int delta = get_bits(&gb, nb_bits);
1563 int step = step_table[c->status[i].step_index];
1564 long vpdiff = 0; // vpdiff = (delta+0.5)*step/4
1575 if (delta & signmask)
1576 c->status[i].predictor -= vpdiff;
1578 c->status[i].predictor += vpdiff;
1580 c->status[i].step_index += table[delta & (~signmask)];
1582 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
1583 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
1585 *samples++ = c->status[i].predictor;
1586 if (samples >= samples_end) {
1587 av_log(avctx, AV_LOG_ERROR, "allocated output buffer is too small\n");
1596 case CODEC_ID_ADPCM_YAMAHA:
1597 while (src < buf + buf_size) {
1599 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
1601 *samples++ = adpcm_yamaha_expand_nibble(&c->status[1],
1604 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
1606 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
1612 case CODEC_ID_ADPCM_THP:
1615 unsigned int samplecnt;
1619 if (buf_size < 80) {
1620 av_log(avctx, AV_LOG_ERROR, "frame too small\n");
1625 samplecnt = bytestream_get_be32(&src);
1627 for (i = 0; i < 32; i++)
1628 table[0][i] = (int16_t)bytestream_get_be16(&src);
1630 /* Initialize the previous sample. */
1631 for (i = 0; i < 4; i++)
1632 prev[0][i] = (int16_t)bytestream_get_be16(&src);
1634 if (samplecnt >= (samples_end - samples) / (st + 1)) {
1635 av_log(avctx, AV_LOG_ERROR, "allocated output buffer is too small\n");
1639 for (ch = 0; ch <= st; ch++) {
1640 samples = (unsigned short *) data + ch;
1642 /* Read in every sample for this channel. */
1643 for (i = 0; i < samplecnt / 14; i++) {
1644 int index = (*src >> 4) & 7;
1645 unsigned int exp = 28 - (*src++ & 15);
1646 int factor1 = table[ch][index * 2];
1647 int factor2 = table[ch][index * 2 + 1];
1649 /* Decode 14 samples. */
1650 for (n = 0; n < 14; n++) {
1652 if(n&1) sampledat= *src++ <<28;
1653 else sampledat= (*src&0xF0)<<24;
1655 sampledat = ((prev[ch][0]*factor1
1656 + prev[ch][1]*factor2) >> 11) + (sampledat>>exp);
1657 *samples = av_clip_int16(sampledat);
1658 prev[ch][1] = prev[ch][0];
1659 prev[ch][0] = *samples++;
1661 /* In case of stereo, skip one sample, this sample
1662 is for the other channel. */
1668 /* In the previous loop, in case stereo is used, samples is
1669 increased exactly one time too often. */
1677 *data_size = (uint8_t *)samples - (uint8_t *)data;
1684 #define ADPCM_ENCODER(id,name,long_name_) \
1685 AVCodec name ## _encoder = { \
1687 AVMEDIA_TYPE_AUDIO, \
1689 sizeof(ADPCMContext), \
1690 adpcm_encode_init, \
1691 adpcm_encode_frame, \
1692 adpcm_encode_close, \
1694 .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE}, \
1695 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1698 #define ADPCM_ENCODER(id,name,long_name_)
1702 #define ADPCM_DECODER(id,name,long_name_) \
1703 AVCodec name ## _decoder = { \
1705 AVMEDIA_TYPE_AUDIO, \
1707 sizeof(ADPCMContext), \
1708 adpcm_decode_init, \
1711 adpcm_decode_frame, \
1712 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1715 #define ADPCM_DECODER(id,name,long_name_)
1718 #define ADPCM_CODEC(id,name,long_name_) \
1719 ADPCM_ENCODER(id,name,long_name_) ADPCM_DECODER(id,name,long_name_)
1721 /* Note: Do not forget to add new entries to the Makefile as well. */
1722 ADPCM_DECODER(CODEC_ID_ADPCM_4XM, adpcm_4xm, "ADPCM 4X Movie");
1723 ADPCM_DECODER(CODEC_ID_ADPCM_CT, adpcm_ct, "ADPCM Creative Technology");
1724 ADPCM_DECODER(CODEC_ID_ADPCM_EA, adpcm_ea, "ADPCM Electronic Arts");
1725 ADPCM_DECODER(CODEC_ID_ADPCM_EA_MAXIS_XA, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
1726 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R1, adpcm_ea_r1, "ADPCM Electronic Arts R1");
1727 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R2, adpcm_ea_r2, "ADPCM Electronic Arts R2");
1728 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R3, adpcm_ea_r3, "ADPCM Electronic Arts R3");
1729 ADPCM_DECODER(CODEC_ID_ADPCM_EA_XAS, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
1730 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv, "ADPCM IMA AMV");
1731 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
1732 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
1733 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
1734 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
1735 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_ISS, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
1736 ADPCM_CODEC (CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt, "ADPCM IMA QuickTime");
1737 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
1738 ADPCM_CODEC (CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav, "ADPCM IMA WAV");
1739 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws, "ADPCM IMA Westwood");
1740 ADPCM_CODEC (CODEC_ID_ADPCM_MS, adpcm_ms, "ADPCM Microsoft");
1741 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
1742 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
1743 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
1744 ADPCM_CODEC (CODEC_ID_ADPCM_SWF, adpcm_swf, "ADPCM Shockwave Flash");
1745 ADPCM_DECODER(CODEC_ID_ADPCM_THP, adpcm_thp, "ADPCM Nintendo Gamecube THP");
1746 ADPCM_DECODER(CODEC_ID_ADPCM_XA, adpcm_xa, "ADPCM CDROM XA");
1747 ADPCM_CODEC (CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha, "ADPCM Yamaha");