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;
166 uint8_t *trellis_hash;
169 #define FREEZE_INTERVAL 128
171 /* XXX: implement encoding */
174 static av_cold int adpcm_encode_init(AVCodecContext *avctx)
176 ADPCMContext *s = avctx->priv_data;
179 if (avctx->channels > 2)
180 return -1; /* only stereo or mono =) */
182 if(avctx->trellis && (unsigned)avctx->trellis > 16U){
183 av_log(avctx, AV_LOG_ERROR, "invalid trellis size\n");
187 if (avctx->trellis) {
188 int frontier = 1 << avctx->trellis;
189 int max_paths = frontier * FREEZE_INTERVAL;
190 FF_ALLOC_OR_GOTO(avctx, s->paths, max_paths * sizeof(*s->paths), error);
191 FF_ALLOC_OR_GOTO(avctx, s->node_buf, 2 * frontier * sizeof(*s->node_buf), error);
192 FF_ALLOC_OR_GOTO(avctx, s->nodep_buf, 2 * frontier * sizeof(*s->nodep_buf), error);
193 FF_ALLOC_OR_GOTO(avctx, s->trellis_hash, 65536 * sizeof(*s->trellis_hash), error);
196 switch(avctx->codec->id) {
197 case CODEC_ID_ADPCM_IMA_WAV:
198 avctx->frame_size = (BLKSIZE - 4 * avctx->channels) * 8 / (4 * avctx->channels) + 1; /* each 16 bits sample gives one nibble */
199 /* and we have 4 bytes per channel overhead */
200 avctx->block_align = BLKSIZE;
201 /* seems frame_size isn't taken into account... have to buffer the samples :-( */
203 case CODEC_ID_ADPCM_IMA_QT:
204 avctx->frame_size = 64;
205 avctx->block_align = 34 * avctx->channels;
207 case CODEC_ID_ADPCM_MS:
208 avctx->frame_size = (BLKSIZE - 7 * avctx->channels) * 2 / avctx->channels + 2; /* each 16 bits sample gives one nibble */
209 /* and we have 7 bytes per channel overhead */
210 avctx->block_align = BLKSIZE;
211 avctx->extradata_size = 32;
212 extradata = avctx->extradata = av_malloc(avctx->extradata_size);
214 return AVERROR(ENOMEM);
215 bytestream_put_le16(&extradata, avctx->frame_size);
216 bytestream_put_le16(&extradata, 7); /* wNumCoef */
217 for (i = 0; i < 7; i++) {
218 bytestream_put_le16(&extradata, AdaptCoeff1[i] * 4);
219 bytestream_put_le16(&extradata, AdaptCoeff2[i] * 4);
222 case CODEC_ID_ADPCM_YAMAHA:
223 avctx->frame_size = BLKSIZE * avctx->channels;
224 avctx->block_align = BLKSIZE;
226 case CODEC_ID_ADPCM_SWF:
227 if (avctx->sample_rate != 11025 &&
228 avctx->sample_rate != 22050 &&
229 avctx->sample_rate != 44100) {
230 av_log(avctx, AV_LOG_ERROR, "Sample rate must be 11025, 22050 or 44100\n");
233 avctx->frame_size = 512 * (avctx->sample_rate / 11025);
239 avctx->coded_frame= avcodec_alloc_frame();
240 avctx->coded_frame->key_frame= 1;
245 av_freep(&s->node_buf);
246 av_freep(&s->nodep_buf);
247 av_freep(&s->trellis_hash);
251 static av_cold int adpcm_encode_close(AVCodecContext *avctx)
253 ADPCMContext *s = avctx->priv_data;
254 av_freep(&avctx->coded_frame);
256 av_freep(&s->node_buf);
257 av_freep(&s->nodep_buf);
258 av_freep(&s->trellis_hash);
264 static inline unsigned char adpcm_ima_compress_sample(ADPCMChannelStatus *c, short sample)
266 int delta = sample - c->prev_sample;
267 int nibble = FFMIN(7, abs(delta)*4/step_table[c->step_index]) + (delta<0)*8;
268 c->prev_sample += ((step_table[c->step_index] * yamaha_difflookup[nibble]) / 8);
269 c->prev_sample = av_clip_int16(c->prev_sample);
270 c->step_index = av_clip(c->step_index + index_table[nibble], 0, 88);
274 static inline unsigned char adpcm_ms_compress_sample(ADPCMChannelStatus *c, short sample)
276 int predictor, nibble, bias;
278 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
280 nibble= sample - predictor;
281 if(nibble>=0) bias= c->idelta/2;
282 else bias=-c->idelta/2;
284 nibble= (nibble + bias) / c->idelta;
285 nibble= av_clip(nibble, -8, 7)&0x0F;
287 predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
289 c->sample2 = c->sample1;
290 c->sample1 = av_clip_int16(predictor);
292 c->idelta = (AdaptationTable[(int)nibble] * c->idelta) >> 8;
293 if (c->idelta < 16) c->idelta = 16;
298 static inline unsigned char adpcm_yamaha_compress_sample(ADPCMChannelStatus *c, short sample)
307 delta = sample - c->predictor;
309 nibble = FFMIN(7, abs(delta)*4/c->step) + (delta<0)*8;
311 c->predictor += ((c->step * yamaha_difflookup[nibble]) / 8);
312 c->predictor = av_clip_int16(c->predictor);
313 c->step = (c->step * yamaha_indexscale[nibble]) >> 8;
314 c->step = av_clip(c->step, 127, 24567);
319 static void adpcm_compress_trellis(AVCodecContext *avctx, const short *samples,
320 uint8_t *dst, ADPCMChannelStatus *c, int n)
322 //FIXME 6% faster if frontier is a compile-time constant
323 ADPCMContext *s = avctx->priv_data;
324 const int frontier = 1 << avctx->trellis;
325 const int stride = avctx->channels;
326 const int version = avctx->codec->id;
327 TrellisPath *paths = s->paths, *p;
328 TrellisNode *node_buf = s->node_buf;
329 TrellisNode **nodep_buf = s->nodep_buf;
330 TrellisNode **nodes = nodep_buf; // nodes[] is always sorted by .ssd
331 TrellisNode **nodes_next = nodep_buf + frontier;
332 int pathn = 0, froze = -1, i, j, k, generation = 0;
333 uint8_t *hash = s->trellis_hash;
334 memset(hash, 0xff, 65536 * sizeof(*hash));
336 memset(nodep_buf, 0, 2 * frontier * sizeof(*nodep_buf));
337 nodes[0] = node_buf + frontier;
340 nodes[0]->step = c->step_index;
341 nodes[0]->sample1 = c->sample1;
342 nodes[0]->sample2 = c->sample2;
343 if((version == CODEC_ID_ADPCM_IMA_WAV) || (version == CODEC_ID_ADPCM_IMA_QT) || (version == CODEC_ID_ADPCM_SWF))
344 nodes[0]->sample1 = c->prev_sample;
345 if(version == CODEC_ID_ADPCM_MS)
346 nodes[0]->step = c->idelta;
347 if(version == CODEC_ID_ADPCM_YAMAHA) {
349 nodes[0]->step = 127;
350 nodes[0]->sample1 = 0;
352 nodes[0]->step = c->step;
353 nodes[0]->sample1 = c->predictor;
358 TrellisNode *t = node_buf + frontier*(i&1);
360 int sample = samples[i*stride];
362 memset(nodes_next, 0, frontier*sizeof(TrellisNode*));
363 for(j=0; j<frontier && nodes[j]; j++) {
364 // higher j have higher ssd already, so they're likely to yield a suboptimal next sample too
365 const int range = (j < frontier/2) ? 1 : 0;
366 const int step = nodes[j]->step;
368 if(version == CODEC_ID_ADPCM_MS) {
369 const int predictor = ((nodes[j]->sample1 * c->coeff1) + (nodes[j]->sample2 * c->coeff2)) / 64;
370 const int div = (sample - predictor) / step;
371 const int nmin = av_clip(div-range, -8, 6);
372 const int nmax = av_clip(div+range, -7, 7);
373 for(nidx=nmin; nidx<=nmax; nidx++) {
374 const int nibble = nidx & 0xf;
375 int dec_sample = predictor + nidx * step;
376 #define STORE_NODE(NAME, STEP_INDEX)\
382 dec_sample = av_clip_int16(dec_sample);\
383 d = sample - dec_sample;\
384 ssd = nodes[j]->ssd + d*d;\
385 /* Check for wraparound, skip such samples completely. \
386 * Note, changing ssd to a 64 bit variable would be \
387 * simpler, avoiding this check, but it's slower on \
388 * x86 32 bit at the moment. */\
389 if (ssd < nodes[j]->ssd)\
391 /* Collapse any two states with the same previous sample value. \
392 * One could also distinguish states by step and by 2nd to last
393 * sample, but the effects of that are negligible.
394 * Since nodes in the previous generation are iterated
395 * through a heap, they're roughly ordered from better to
396 * worse, but not strictly ordered. Therefore, an earlier
397 * node with the same sample value is better in most cases
398 * (and thus the current is skipped), but not strictly
399 * in all cases. Only skipping samples where ssd >=
400 * ssd of the earlier node with the same sample gives
401 * slightly worse quality, though, for some reason. */ \
402 h = &hash[(uint16_t) dec_sample];\
403 if (*h == generation)\
405 if (heap_pos < frontier) {\
408 /* Try to replace one of the leaf nodes with the new \
409 * one, but try a different slot each time. */\
410 pos = (frontier >> 1) + (heap_pos & ((frontier >> 1) - 1));\
411 if (ssd > nodes_next[pos]->ssd)\
416 u = nodes_next[pos];\
418 assert(pathn < FREEZE_INTERVAL<<avctx->trellis);\
420 nodes_next[pos] = u;\
424 u->step = STEP_INDEX;\
425 u->sample2 = nodes[j]->sample1;\
426 u->sample1 = dec_sample;\
427 paths[u->path].nibble = nibble;\
428 paths[u->path].prev = nodes[j]->path;\
429 /* Sift the newly inserted node up in the heap to \
430 * restore the heap property. */\
432 int parent = (pos - 1) >> 1;\
433 if (nodes_next[parent]->ssd <= ssd)\
435 FFSWAP(TrellisNode*, nodes_next[parent], nodes_next[pos]);\
439 STORE_NODE(ms, FFMAX(16, (AdaptationTable[nibble] * step) >> 8));
441 } else if((version == CODEC_ID_ADPCM_IMA_WAV)|| (version == CODEC_ID_ADPCM_IMA_QT)|| (version == CODEC_ID_ADPCM_SWF)) {
442 #define LOOP_NODES(NAME, STEP_TABLE, STEP_INDEX)\
443 const int predictor = nodes[j]->sample1;\
444 const int div = (sample - predictor) * 4 / STEP_TABLE;\
445 int nmin = av_clip(div-range, -7, 6);\
446 int nmax = av_clip(div+range, -6, 7);\
447 if(nmin<=0) nmin--; /* distinguish -0 from +0 */\
449 for(nidx=nmin; nidx<=nmax; nidx++) {\
450 const int nibble = nidx<0 ? 7-nidx : nidx;\
451 int dec_sample = predictor + (STEP_TABLE * yamaha_difflookup[nibble]) / 8;\
452 STORE_NODE(NAME, STEP_INDEX);\
454 LOOP_NODES(ima, step_table[step], av_clip(step + index_table[nibble], 0, 88));
455 } else { //CODEC_ID_ADPCM_YAMAHA
456 LOOP_NODES(yamaha, step, av_clip((step * yamaha_indexscale[nibble]) >> 8, 127, 24567));
467 if (generation == 255) {
468 memset(hash, 0xff, 65536 * sizeof(*hash));
473 if(nodes[0]->ssd > (1<<28)) {
474 for(j=1; j<frontier && nodes[j]; j++)
475 nodes[j]->ssd -= nodes[0]->ssd;
479 // merge old paths to save memory
480 if(i == froze + FREEZE_INTERVAL) {
481 p = &paths[nodes[0]->path];
482 for(k=i; k>froze; k--) {
488 // other nodes might use paths that don't coincide with the frozen one.
489 // checking which nodes do so is too slow, so just kill them all.
490 // this also slightly improves quality, but I don't know why.
491 memset(nodes+1, 0, (frontier-1)*sizeof(TrellisNode*));
495 p = &paths[nodes[0]->path];
496 for(i=n-1; i>froze; i--) {
501 c->predictor = nodes[0]->sample1;
502 c->sample1 = nodes[0]->sample1;
503 c->sample2 = nodes[0]->sample2;
504 c->step_index = nodes[0]->step;
505 c->step = nodes[0]->step;
506 c->idelta = nodes[0]->step;
509 static int adpcm_encode_frame(AVCodecContext *avctx,
510 unsigned char *frame, int buf_size, void *data)
515 ADPCMContext *c = avctx->priv_data;
519 samples = (short *)data;
520 st= avctx->channels == 2;
521 /* n = (BLKSIZE - 4 * avctx->channels) / (2 * 8 * avctx->channels); */
523 switch(avctx->codec->id) {
524 case CODEC_ID_ADPCM_IMA_WAV:
525 n = avctx->frame_size / 8;
526 c->status[0].prev_sample = (signed short)samples[0]; /* XXX */
527 /* c->status[0].step_index = 0; *//* XXX: not sure how to init the state machine */
528 bytestream_put_le16(&dst, c->status[0].prev_sample);
529 *dst++ = (unsigned char)c->status[0].step_index;
530 *dst++ = 0; /* unknown */
532 if (avctx->channels == 2) {
533 c->status[1].prev_sample = (signed short)samples[0];
534 /* c->status[1].step_index = 0; */
535 bytestream_put_le16(&dst, c->status[1].prev_sample);
536 *dst++ = (unsigned char)c->status[1].step_index;
541 /* stereo: 4 bytes (8 samples) for left, 4 bytes for right, 4 bytes left, ... */
542 if(avctx->trellis > 0) {
543 FF_ALLOC_OR_GOTO(avctx, buf, 2*n*8, error);
544 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n*8);
545 if(avctx->channels == 2)
546 adpcm_compress_trellis(avctx, samples+1, buf + n*8, &c->status[1], n*8);
548 *dst++ = buf[8*i+0] | (buf[8*i+1] << 4);
549 *dst++ = buf[8*i+2] | (buf[8*i+3] << 4);
550 *dst++ = buf[8*i+4] | (buf[8*i+5] << 4);
551 *dst++ = buf[8*i+6] | (buf[8*i+7] << 4);
552 if (avctx->channels == 2) {
553 uint8_t *buf1 = buf + n*8;
554 *dst++ = buf1[8*i+0] | (buf1[8*i+1] << 4);
555 *dst++ = buf1[8*i+2] | (buf1[8*i+3] << 4);
556 *dst++ = buf1[8*i+4] | (buf1[8*i+5] << 4);
557 *dst++ = buf1[8*i+6] | (buf1[8*i+7] << 4);
563 *dst = adpcm_ima_compress_sample(&c->status[0], samples[0]);
564 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels]) << 4;
566 *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 2]);
567 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 3]) << 4;
569 *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 4]);
570 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 5]) << 4;
572 *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 6]);
573 *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 7]) << 4;
576 if (avctx->channels == 2) {
577 *dst = adpcm_ima_compress_sample(&c->status[1], samples[1]);
578 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[3]) << 4;
580 *dst = adpcm_ima_compress_sample(&c->status[1], samples[5]);
581 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[7]) << 4;
583 *dst = adpcm_ima_compress_sample(&c->status[1], samples[9]);
584 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[11]) << 4;
586 *dst = adpcm_ima_compress_sample(&c->status[1], samples[13]);
587 *dst |= adpcm_ima_compress_sample(&c->status[1], samples[15]) << 4;
590 samples += 8 * avctx->channels;
593 case CODEC_ID_ADPCM_IMA_QT:
597 init_put_bits(&pb, dst, buf_size*8);
599 for(ch=0; ch<avctx->channels; ch++){
600 put_bits(&pb, 9, (c->status[ch].prev_sample + 0x10000) >> 7);
601 put_bits(&pb, 7, c->status[ch].step_index);
602 if(avctx->trellis > 0) {
604 adpcm_compress_trellis(avctx, samples+ch, buf, &c->status[ch], 64);
606 put_bits(&pb, 4, buf[i^1]);
607 c->status[ch].prev_sample = c->status[ch].predictor & ~0x7F;
609 for (i=0; i<64; i+=2){
611 t1 = adpcm_ima_compress_sample(&c->status[ch], samples[avctx->channels*(i+0)+ch]);
612 t2 = adpcm_ima_compress_sample(&c->status[ch], samples[avctx->channels*(i+1)+ch]);
613 put_bits(&pb, 4, t2);
614 put_bits(&pb, 4, t1);
616 c->status[ch].prev_sample &= ~0x7F;
621 dst += put_bits_count(&pb)>>3;
624 case CODEC_ID_ADPCM_SWF:
628 init_put_bits(&pb, dst, buf_size*8);
630 n = avctx->frame_size-1;
632 //Store AdpcmCodeSize
633 put_bits(&pb, 2, 2); //Set 4bits flash adpcm format
635 //Init the encoder state
636 for(i=0; i<avctx->channels; i++){
637 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 63); // clip step so it fits 6 bits
638 put_sbits(&pb, 16, samples[i]);
639 put_bits(&pb, 6, c->status[i].step_index);
640 c->status[i].prev_sample = (signed short)samples[i];
643 if(avctx->trellis > 0) {
644 FF_ALLOC_OR_GOTO(avctx, buf, 2*n, error);
645 adpcm_compress_trellis(avctx, samples+2, buf, &c->status[0], n);
646 if (avctx->channels == 2)
647 adpcm_compress_trellis(avctx, samples+3, buf+n, &c->status[1], n);
649 put_bits(&pb, 4, buf[i]);
650 if (avctx->channels == 2)
651 put_bits(&pb, 4, buf[n+i]);
655 for (i=1; i<avctx->frame_size; i++) {
656 put_bits(&pb, 4, adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels*i]));
657 if (avctx->channels == 2)
658 put_bits(&pb, 4, adpcm_ima_compress_sample(&c->status[1], samples[2*i+1]));
662 dst += put_bits_count(&pb)>>3;
665 case CODEC_ID_ADPCM_MS:
666 for(i=0; i<avctx->channels; i++){
670 c->status[i].coeff1 = AdaptCoeff1[predictor];
671 c->status[i].coeff2 = AdaptCoeff2[predictor];
673 for(i=0; i<avctx->channels; i++){
674 if (c->status[i].idelta < 16)
675 c->status[i].idelta = 16;
677 bytestream_put_le16(&dst, c->status[i].idelta);
679 for(i=0; i<avctx->channels; i++){
680 c->status[i].sample2= *samples++;
682 for(i=0; i<avctx->channels; i++){
683 c->status[i].sample1= *samples++;
685 bytestream_put_le16(&dst, c->status[i].sample1);
687 for(i=0; i<avctx->channels; i++)
688 bytestream_put_le16(&dst, c->status[i].sample2);
690 if(avctx->trellis > 0) {
691 int n = avctx->block_align - 7*avctx->channels;
692 FF_ALLOC_OR_GOTO(avctx, buf, 2*n, error);
693 if(avctx->channels == 1) {
694 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
696 *dst++ = (buf[i] << 4) | buf[i+1];
698 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
699 adpcm_compress_trellis(avctx, samples+1, buf+n, &c->status[1], n);
701 *dst++ = (buf[i] << 4) | buf[n+i];
705 for(i=7*avctx->channels; i<avctx->block_align; i++) {
707 nibble = adpcm_ms_compress_sample(&c->status[ 0], *samples++)<<4;
708 nibble|= adpcm_ms_compress_sample(&c->status[st], *samples++);
712 case CODEC_ID_ADPCM_YAMAHA:
713 n = avctx->frame_size / 2;
714 if(avctx->trellis > 0) {
715 FF_ALLOC_OR_GOTO(avctx, buf, 2*n*2, error);
717 if(avctx->channels == 1) {
718 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
720 *dst++ = buf[i] | (buf[i+1] << 4);
722 adpcm_compress_trellis(avctx, samples, buf, &c->status[0], n);
723 adpcm_compress_trellis(avctx, samples+1, buf+n, &c->status[1], n);
725 *dst++ = buf[i] | (buf[n+i] << 4);
729 for (n *= avctx->channels; n>0; n--) {
731 nibble = adpcm_yamaha_compress_sample(&c->status[ 0], *samples++);
732 nibble |= adpcm_yamaha_compress_sample(&c->status[st], *samples++) << 4;
742 #endif //CONFIG_ENCODERS
744 static av_cold int adpcm_decode_init(AVCodecContext * avctx)
746 ADPCMContext *c = avctx->priv_data;
747 unsigned int max_channels = 2;
749 switch(avctx->codec->id) {
750 case CODEC_ID_ADPCM_EA_R1:
751 case CODEC_ID_ADPCM_EA_R2:
752 case CODEC_ID_ADPCM_EA_R3:
753 case CODEC_ID_ADPCM_EA_XAS:
757 if(avctx->channels > max_channels){
761 switch(avctx->codec->id) {
762 case CODEC_ID_ADPCM_CT:
763 c->status[0].step = c->status[1].step = 511;
765 case CODEC_ID_ADPCM_IMA_WAV:
766 if (avctx->bits_per_coded_sample != 4) {
767 av_log(avctx, AV_LOG_ERROR, "Only 4-bit ADPCM IMA WAV files are supported\n");
771 case CODEC_ID_ADPCM_IMA_WS:
772 if (avctx->extradata && avctx->extradata_size == 2 * 4) {
773 c->status[0].predictor = AV_RL32(avctx->extradata);
774 c->status[1].predictor = AV_RL32(avctx->extradata + 4);
780 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
784 static inline short adpcm_ima_expand_nibble(ADPCMChannelStatus *c, char nibble, int shift)
788 int sign, delta, diff, step;
790 step = step_table[c->step_index];
791 step_index = c->step_index + index_table[(unsigned)nibble];
792 if (step_index < 0) step_index = 0;
793 else if (step_index > 88) step_index = 88;
797 /* perform direct multiplication instead of series of jumps proposed by
798 * the reference ADPCM implementation since modern CPUs can do the mults
800 diff = ((2 * delta + 1) * step) >> shift;
801 predictor = c->predictor;
802 if (sign) predictor -= diff;
803 else predictor += diff;
805 c->predictor = av_clip_int16(predictor);
806 c->step_index = step_index;
808 return (short)c->predictor;
811 static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, char nibble)
815 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
816 predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
818 c->sample2 = c->sample1;
819 c->sample1 = av_clip_int16(predictor);
820 c->idelta = (AdaptationTable[(int)nibble] * c->idelta) >> 8;
821 if (c->idelta < 16) c->idelta = 16;
826 static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
828 int sign, delta, diff;
833 /* perform direct multiplication instead of series of jumps proposed by
834 * the reference ADPCM implementation since modern CPUs can do the mults
836 diff = ((2 * delta + 1) * c->step) >> 3;
837 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
838 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
839 c->predictor = av_clip_int16(c->predictor);
840 /* calculate new step and clamp it to range 511..32767 */
841 new_step = (AdaptationTable[nibble & 7] * c->step) >> 8;
842 c->step = av_clip(new_step, 511, 32767);
844 return (short)c->predictor;
847 static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble, int size, int shift)
849 int sign, delta, diff;
851 sign = nibble & (1<<(size-1));
852 delta = nibble & ((1<<(size-1))-1);
853 diff = delta << (7 + c->step + shift);
856 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
858 /* calculate new step */
859 if (delta >= (2*size - 3) && c->step < 3)
861 else if (delta == 0 && c->step > 0)
864 return (short) c->predictor;
867 static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned char nibble)
874 c->predictor += (c->step * yamaha_difflookup[nibble]) / 8;
875 c->predictor = av_clip_int16(c->predictor);
876 c->step = (c->step * yamaha_indexscale[nibble]) >> 8;
877 c->step = av_clip(c->step, 127, 24567);
881 static void xa_decode(short *out, const unsigned char *in,
882 ADPCMChannelStatus *left, ADPCMChannelStatus *right, int inc)
885 int shift,filter,f0,f1;
891 shift = 12 - (in[4+i*2] & 15);
892 filter = in[4+i*2] >> 4;
893 f0 = xa_adpcm_table[filter][0];
894 f1 = xa_adpcm_table[filter][1];
902 t = (signed char)(d<<4)>>4;
903 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
905 s_1 = av_clip_int16(s);
910 if (inc==2) { /* stereo */
913 s_1 = right->sample1;
914 s_2 = right->sample2;
915 out = out + 1 - 28*2;
918 shift = 12 - (in[5+i*2] & 15);
919 filter = in[5+i*2] >> 4;
921 f0 = xa_adpcm_table[filter][0];
922 f1 = xa_adpcm_table[filter][1];
927 t = (signed char)d >> 4;
928 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
930 s_1 = av_clip_int16(s);
935 if (inc==2) { /* stereo */
936 right->sample1 = s_1;
937 right->sample2 = s_2;
947 /* DK3 ADPCM support macro */
948 #define DK3_GET_NEXT_NIBBLE() \
949 if (decode_top_nibble_next) \
951 nibble = last_byte >> 4; \
952 decode_top_nibble_next = 0; \
956 last_byte = *src++; \
957 if (src >= buf + buf_size) break; \
958 nibble = last_byte & 0x0F; \
959 decode_top_nibble_next = 1; \
962 static int adpcm_decode_frame(AVCodecContext *avctx,
963 void *data, int *data_size,
966 const uint8_t *buf = avpkt->data;
967 int buf_size = avpkt->size;
968 ADPCMContext *c = avctx->priv_data;
969 ADPCMChannelStatus *cs;
970 int n, m, channel, i;
971 int block_predictor[2];
977 /* DK3 ADPCM accounting variables */
978 unsigned char last_byte = 0;
979 unsigned char nibble;
980 int decode_top_nibble_next = 0;
983 /* EA ADPCM state variables */
984 uint32_t samples_in_chunk;
985 int32_t previous_left_sample, previous_right_sample;
986 int32_t current_left_sample, current_right_sample;
987 int32_t next_left_sample, next_right_sample;
988 int32_t coeff1l, coeff2l, coeff1r, coeff2r;
989 uint8_t shift_left, shift_right;
991 int coeff[2][2], shift[2];//used in EA MAXIS ADPCM
996 //should protect all 4bit ADPCM variants
997 //8 is needed for CODEC_ID_ADPCM_IMA_WAV with 2 channels
999 if(*data_size/4 < buf_size + 8)
1003 samples_end= samples + *data_size/2;
1007 st = avctx->channels == 2 ? 1 : 0;
1009 switch(avctx->codec->id) {
1010 case CODEC_ID_ADPCM_IMA_QT:
1011 n = buf_size - 2*avctx->channels;
1012 for (channel = 0; channel < avctx->channels; channel++) {
1013 cs = &(c->status[channel]);
1014 /* (pppppp) (piiiiiii) */
1016 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
1017 cs->predictor = (*src++) << 8;
1018 cs->predictor |= (*src & 0x80);
1019 cs->predictor &= 0xFF80;
1021 /* sign extension */
1022 if(cs->predictor & 0x8000)
1023 cs->predictor -= 0x10000;
1025 cs->predictor = av_clip_int16(cs->predictor);
1027 cs->step_index = (*src++) & 0x7F;
1029 if (cs->step_index > 88){
1030 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", cs->step_index);
1031 cs->step_index = 88;
1034 cs->step = step_table[cs->step_index];
1036 samples = (short*)data + channel;
1038 for(m=32; n>0 && m>0; n--, m--) { /* in QuickTime, IMA is encoded by chuncks of 34 bytes (=64 samples) */
1039 *samples = adpcm_ima_expand_nibble(cs, src[0] & 0x0F, 3);
1040 samples += avctx->channels;
1041 *samples = adpcm_ima_expand_nibble(cs, src[0] >> 4 , 3);
1042 samples += avctx->channels;
1049 case CODEC_ID_ADPCM_IMA_WAV:
1050 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1051 buf_size = avctx->block_align;
1053 // samples_per_block= (block_align-4*chanels)*8 / (bits_per_sample * chanels) + 1;
1055 for(i=0; i<avctx->channels; i++){
1056 cs = &(c->status[i]);
1057 cs->predictor = *samples++ = (int16_t)bytestream_get_le16(&src);
1059 cs->step_index = *src++;
1060 if (cs->step_index > 88){
1061 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", cs->step_index);
1062 cs->step_index = 88;
1064 if (*src++) av_log(avctx, AV_LOG_ERROR, "unused byte should be null but is %d!!\n", src[-1]); /* unused */
1067 while(src < buf + buf_size){
1069 for(i=0; i<=st; i++)
1070 *samples++ = adpcm_ima_expand_nibble(&c->status[i], src[4*i] & 0x0F, 3);
1071 for(i=0; i<=st; i++)
1072 *samples++ = adpcm_ima_expand_nibble(&c->status[i], src[4*i] >> 4 , 3);
1078 case CODEC_ID_ADPCM_4XM:
1079 cs = &(c->status[0]);
1080 c->status[0].predictor= (int16_t)bytestream_get_le16(&src);
1082 c->status[1].predictor= (int16_t)bytestream_get_le16(&src);
1084 c->status[0].step_index= (int16_t)bytestream_get_le16(&src);
1086 c->status[1].step_index= (int16_t)bytestream_get_le16(&src);
1088 if (cs->step_index < 0) cs->step_index = 0;
1089 if (cs->step_index > 88) cs->step_index = 88;
1091 m= (buf_size - (src - buf))>>st;
1092 for(i=0; i<m; i++) {
1093 *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[i] & 0x0F, 4);
1095 *samples++ = adpcm_ima_expand_nibble(&c->status[1], src[i+m] & 0x0F, 4);
1096 *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[i] >> 4, 4);
1098 *samples++ = adpcm_ima_expand_nibble(&c->status[1], src[i+m] >> 4, 4);
1104 case CODEC_ID_ADPCM_MS:
1105 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1106 buf_size = avctx->block_align;
1107 n = buf_size - 7 * avctx->channels;
1110 block_predictor[0] = av_clip(*src++, 0, 6);
1111 block_predictor[1] = 0;
1113 block_predictor[1] = av_clip(*src++, 0, 6);
1114 c->status[0].idelta = (int16_t)bytestream_get_le16(&src);
1116 c->status[1].idelta = (int16_t)bytestream_get_le16(&src);
1118 c->status[0].coeff1 = AdaptCoeff1[block_predictor[0]];
1119 c->status[0].coeff2 = AdaptCoeff2[block_predictor[0]];
1120 c->status[1].coeff1 = AdaptCoeff1[block_predictor[1]];
1121 c->status[1].coeff2 = AdaptCoeff2[block_predictor[1]];
1123 c->status[0].sample1 = bytestream_get_le16(&src);
1124 if (st) c->status[1].sample1 = bytestream_get_le16(&src);
1125 c->status[0].sample2 = bytestream_get_le16(&src);
1126 if (st) c->status[1].sample2 = bytestream_get_le16(&src);
1128 *samples++ = c->status[0].sample2;
1129 if (st) *samples++ = c->status[1].sample2;
1130 *samples++ = c->status[0].sample1;
1131 if (st) *samples++ = c->status[1].sample1;
1133 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], src[0] >> 4 );
1134 *samples++ = adpcm_ms_expand_nibble(&c->status[st], src[0] & 0x0F);
1138 case CODEC_ID_ADPCM_IMA_DK4:
1139 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1140 buf_size = avctx->block_align;
1142 c->status[0].predictor = (int16_t)bytestream_get_le16(&src);
1143 c->status[0].step_index = *src++;
1145 *samples++ = c->status[0].predictor;
1147 c->status[1].predictor = (int16_t)bytestream_get_le16(&src);
1148 c->status[1].step_index = *src++;
1150 *samples++ = c->status[1].predictor;
1152 while (src < buf + buf_size) {
1154 /* take care of the top nibble (always left or mono channel) */
1155 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1158 /* take care of the bottom nibble, which is right sample for
1159 * stereo, or another mono sample */
1161 *samples++ = adpcm_ima_expand_nibble(&c->status[1],
1164 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1170 case CODEC_ID_ADPCM_IMA_DK3:
1171 if (avctx->block_align != 0 && buf_size > avctx->block_align)
1172 buf_size = avctx->block_align;
1174 if(buf_size + 16 > (samples_end - samples)*3/8)
1177 c->status[0].predictor = (int16_t)AV_RL16(src + 10);
1178 c->status[1].predictor = (int16_t)AV_RL16(src + 12);
1179 c->status[0].step_index = src[14];
1180 c->status[1].step_index = src[15];
1181 /* sign extend the predictors */
1183 diff_channel = c->status[1].predictor;
1185 /* the DK3_GET_NEXT_NIBBLE macro issues the break statement when
1186 * the buffer is consumed */
1189 /* for this algorithm, c->status[0] is the sum channel and
1190 * c->status[1] is the diff channel */
1192 /* process the first predictor of the sum channel */
1193 DK3_GET_NEXT_NIBBLE();
1194 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1196 /* process the diff channel predictor */
1197 DK3_GET_NEXT_NIBBLE();
1198 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
1200 /* process the first pair of stereo PCM samples */
1201 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1202 *samples++ = c->status[0].predictor + c->status[1].predictor;
1203 *samples++ = c->status[0].predictor - c->status[1].predictor;
1205 /* process the second predictor of the sum channel */
1206 DK3_GET_NEXT_NIBBLE();
1207 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1209 /* process the second pair of stereo PCM samples */
1210 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1211 *samples++ = c->status[0].predictor + c->status[1].predictor;
1212 *samples++ = c->status[0].predictor - c->status[1].predictor;
1215 case CODEC_ID_ADPCM_IMA_ISS:
1216 c->status[0].predictor = (int16_t)AV_RL16(src + 0);
1217 c->status[0].step_index = src[2];
1220 c->status[1].predictor = (int16_t)AV_RL16(src + 0);
1221 c->status[1].step_index = src[2];
1225 while (src < buf + buf_size) {
1228 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1230 *samples++ = adpcm_ima_expand_nibble(&c->status[1],
1233 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1235 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1242 case CODEC_ID_ADPCM_IMA_WS:
1243 /* no per-block initialization; just start decoding the data */
1244 while (src < buf + buf_size) {
1247 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1249 *samples++ = adpcm_ima_expand_nibble(&c->status[1],
1252 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1254 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1261 case CODEC_ID_ADPCM_XA:
1262 while (buf_size >= 128) {
1263 xa_decode(samples, src, &c->status[0], &c->status[1],
1270 case CODEC_ID_ADPCM_IMA_EA_EACS:
1271 samples_in_chunk = bytestream_get_le32(&src) >> (1-st);
1273 if (samples_in_chunk > buf_size-4-(8<<st)) {
1274 src += buf_size - 4;
1278 for (i=0; i<=st; i++)
1279 c->status[i].step_index = bytestream_get_le32(&src);
1280 for (i=0; i<=st; i++)
1281 c->status[i].predictor = bytestream_get_le32(&src);
1283 for (; samples_in_chunk; samples_in_chunk--, src++) {
1284 *samples++ = adpcm_ima_expand_nibble(&c->status[0], *src>>4, 3);
1285 *samples++ = adpcm_ima_expand_nibble(&c->status[st], *src&0x0F, 3);
1288 case CODEC_ID_ADPCM_IMA_EA_SEAD:
1289 for (; src < buf+buf_size; src++) {
1290 *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[0] >> 4, 6);
1291 *samples++ = adpcm_ima_expand_nibble(&c->status[st],src[0]&0x0F, 6);
1294 case CODEC_ID_ADPCM_EA:
1295 if (buf_size < 12 || AV_RL32(src) > (buf_size - 12)/30*28) {
1299 samples_in_chunk = AV_RL32(src);
1301 current_left_sample = (int16_t)bytestream_get_le16(&src);
1302 previous_left_sample = (int16_t)bytestream_get_le16(&src);
1303 current_right_sample = (int16_t)bytestream_get_le16(&src);
1304 previous_right_sample = (int16_t)bytestream_get_le16(&src);
1306 for (count1 = 0; count1 < samples_in_chunk/28;count1++) {
1307 coeff1l = ea_adpcm_table[ *src >> 4 ];
1308 coeff2l = ea_adpcm_table[(*src >> 4 ) + 4];
1309 coeff1r = ea_adpcm_table[*src & 0x0F];
1310 coeff2r = ea_adpcm_table[(*src & 0x0F) + 4];
1313 shift_left = (*src >> 4 ) + 8;
1314 shift_right = (*src & 0x0F) + 8;
1317 for (count2 = 0; count2 < 28; count2++) {
1318 next_left_sample = (int32_t)((*src & 0xF0) << 24) >> shift_left;
1319 next_right_sample = (int32_t)((*src & 0x0F) << 28) >> shift_right;
1322 next_left_sample = (next_left_sample +
1323 (current_left_sample * coeff1l) +
1324 (previous_left_sample * coeff2l) + 0x80) >> 8;
1325 next_right_sample = (next_right_sample +
1326 (current_right_sample * coeff1r) +
1327 (previous_right_sample * coeff2r) + 0x80) >> 8;
1329 previous_left_sample = current_left_sample;
1330 current_left_sample = av_clip_int16(next_left_sample);
1331 previous_right_sample = current_right_sample;
1332 current_right_sample = av_clip_int16(next_right_sample);
1333 *samples++ = (unsigned short)current_left_sample;
1334 *samples++ = (unsigned short)current_right_sample;
1338 if (src - buf == buf_size - 2)
1339 src += 2; // Skip terminating 0x0000
1342 case CODEC_ID_ADPCM_EA_MAXIS_XA:
1343 for(channel = 0; channel < avctx->channels; channel++) {
1345 coeff[channel][i] = ea_adpcm_table[(*src >> 4) + 4*i];
1346 shift[channel] = (*src & 0x0F) + 8;
1349 for (count1 = 0; count1 < (buf_size - avctx->channels) / avctx->channels; count1++) {
1350 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1351 for(channel = 0; channel < avctx->channels; channel++) {
1352 int32_t sample = (int32_t)(((*(src+channel) >> i) & 0x0F) << 0x1C) >> shift[channel];
1354 c->status[channel].sample1 * coeff[channel][0] +
1355 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1356 c->status[channel].sample2 = c->status[channel].sample1;
1357 c->status[channel].sample1 = av_clip_int16(sample);
1358 *samples++ = c->status[channel].sample1;
1361 src+=avctx->channels;
1364 case CODEC_ID_ADPCM_EA_R1:
1365 case CODEC_ID_ADPCM_EA_R2:
1366 case CODEC_ID_ADPCM_EA_R3: {
1367 /* channel numbering
1369 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1370 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1371 const int big_endian = avctx->codec->id == CODEC_ID_ADPCM_EA_R3;
1372 int32_t previous_sample, current_sample, next_sample;
1373 int32_t coeff1, coeff2;
1375 unsigned int channel;
1377 const uint8_t *srcC;
1378 const uint8_t *src_end = buf + buf_size;
1380 samples_in_chunk = (big_endian ? bytestream_get_be32(&src)
1381 : bytestream_get_le32(&src)) / 28;
1382 if (samples_in_chunk > UINT32_MAX/(28*avctx->channels) ||
1383 28*samples_in_chunk*avctx->channels > samples_end-samples) {
1384 src += buf_size - 4;
1388 for (channel=0; channel<avctx->channels; channel++) {
1389 int32_t offset = (big_endian ? bytestream_get_be32(&src)
1390 : bytestream_get_le32(&src))
1391 + (avctx->channels-channel-1) * 4;
1393 if ((offset < 0) || (offset >= src_end - src - 4)) break;
1394 srcC = src + offset;
1395 samplesC = samples + channel;
1397 if (avctx->codec->id == CODEC_ID_ADPCM_EA_R1) {
1398 current_sample = (int16_t)bytestream_get_le16(&srcC);
1399 previous_sample = (int16_t)bytestream_get_le16(&srcC);
1401 current_sample = c->status[channel].predictor;
1402 previous_sample = c->status[channel].prev_sample;
1405 for (count1=0; count1<samples_in_chunk; count1++) {
1406 if (*srcC == 0xEE) { /* only seen in R2 and R3 */
1408 if (srcC > src_end - 30*2) break;
1409 current_sample = (int16_t)bytestream_get_be16(&srcC);
1410 previous_sample = (int16_t)bytestream_get_be16(&srcC);
1412 for (count2=0; count2<28; count2++) {
1413 *samplesC = (int16_t)bytestream_get_be16(&srcC);
1414 samplesC += avctx->channels;
1417 coeff1 = ea_adpcm_table[ *srcC>>4 ];
1418 coeff2 = ea_adpcm_table[(*srcC>>4) + 4];
1419 shift = (*srcC++ & 0x0F) + 8;
1421 if (srcC > src_end - 14) break;
1422 for (count2=0; count2<28; count2++) {
1424 next_sample = (int32_t)((*srcC++ & 0x0F) << 28) >> shift;
1426 next_sample = (int32_t)((*srcC & 0xF0) << 24) >> shift;
1428 next_sample += (current_sample * coeff1) +
1429 (previous_sample * coeff2);
1430 next_sample = av_clip_int16(next_sample >> 8);
1432 previous_sample = current_sample;
1433 current_sample = next_sample;
1434 *samplesC = current_sample;
1435 samplesC += avctx->channels;
1440 if (avctx->codec->id != CODEC_ID_ADPCM_EA_R1) {
1441 c->status[channel].predictor = current_sample;
1442 c->status[channel].prev_sample = previous_sample;
1446 src = src + buf_size - (4 + 4*avctx->channels);
1447 samples += 28 * samples_in_chunk * avctx->channels;
1450 case CODEC_ID_ADPCM_EA_XAS:
1451 if (samples_end-samples < 32*4*avctx->channels
1452 || buf_size < (4+15)*4*avctx->channels) {
1456 for (channel=0; channel<avctx->channels; channel++) {
1457 int coeff[2][4], shift[4];
1458 short *s2, *s = &samples[channel];
1459 for (n=0; n<4; n++, s+=32*avctx->channels) {
1461 coeff[i][n] = ea_adpcm_table[(src[0]&0x0F)+4*i];
1462 shift[n] = (src[2]&0x0F) + 8;
1463 for (s2=s, i=0; i<2; i++, src+=2, s2+=avctx->channels)
1464 s2[0] = (src[0]&0xF0) + (src[1]<<8);
1467 for (m=2; m<32; m+=2) {
1468 s = &samples[m*avctx->channels + channel];
1469 for (n=0; n<4; n++, src++, s+=32*avctx->channels) {
1470 for (s2=s, i=0; i<8; i+=4, s2+=avctx->channels) {
1471 int level = (int32_t)((*src & (0xF0>>i)) << (24+i)) >> shift[n];
1472 int pred = s2[-1*avctx->channels] * coeff[0][n]
1473 + s2[-2*avctx->channels] * coeff[1][n];
1474 s2[0] = av_clip_int16((level + pred + 0x80) >> 8);
1479 samples += 32*4*avctx->channels;
1481 case CODEC_ID_ADPCM_IMA_AMV:
1482 case CODEC_ID_ADPCM_IMA_SMJPEG:
1483 c->status[0].predictor = (int16_t)bytestream_get_le16(&src);
1484 c->status[0].step_index = bytestream_get_le16(&src);
1486 if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV)
1489 while (src < buf + buf_size) {
1494 if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV)
1495 FFSWAP(char, hi, lo);
1497 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1499 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1504 case CODEC_ID_ADPCM_CT:
1505 while (src < buf + buf_size) {
1507 *samples++ = adpcm_ct_expand_nibble(&c->status[0],
1509 *samples++ = adpcm_ct_expand_nibble(&c->status[1],
1512 *samples++ = adpcm_ct_expand_nibble(&c->status[0],
1514 *samples++ = adpcm_ct_expand_nibble(&c->status[0],
1520 case CODEC_ID_ADPCM_SBPRO_4:
1521 case CODEC_ID_ADPCM_SBPRO_3:
1522 case CODEC_ID_ADPCM_SBPRO_2:
1523 if (!c->status[0].step_index) {
1524 /* the first byte is a raw sample */
1525 *samples++ = 128 * (*src++ - 0x80);
1527 *samples++ = 128 * (*src++ - 0x80);
1528 c->status[0].step_index = 1;
1530 if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_4) {
1531 while (src < buf + buf_size) {
1532 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1534 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1535 src[0] & 0x0F, 4, 0);
1538 } else if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_3) {
1539 while (src < buf + buf_size && samples + 2 < samples_end) {
1540 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1541 src[0] >> 5 , 3, 0);
1542 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1543 (src[0] >> 2) & 0x07, 3, 0);
1544 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1545 src[0] & 0x03, 2, 0);
1549 while (src < buf + buf_size && samples + 3 < samples_end) {
1550 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1551 src[0] >> 6 , 2, 2);
1552 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1553 (src[0] >> 4) & 0x03, 2, 2);
1554 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1555 (src[0] >> 2) & 0x03, 2, 2);
1556 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1557 src[0] & 0x03, 2, 2);
1562 case CODEC_ID_ADPCM_SWF:
1566 int k0, signmask, nb_bits, count;
1567 int size = buf_size*8;
1569 init_get_bits(&gb, buf, size);
1571 //read bits & initial values
1572 nb_bits = get_bits(&gb, 2)+2;
1573 //av_log(NULL,AV_LOG_INFO,"nb_bits: %d\n", nb_bits);
1574 table = swf_index_tables[nb_bits-2];
1575 k0 = 1 << (nb_bits-2);
1576 signmask = 1 << (nb_bits-1);
1578 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
1579 for (i = 0; i < avctx->channels; i++) {
1580 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
1581 c->status[i].step_index = get_bits(&gb, 6);
1584 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
1587 for (i = 0; i < avctx->channels; i++) {
1588 // similar to IMA adpcm
1589 int delta = get_bits(&gb, nb_bits);
1590 int step = step_table[c->status[i].step_index];
1591 long vpdiff = 0; // vpdiff = (delta+0.5)*step/4
1602 if (delta & signmask)
1603 c->status[i].predictor -= vpdiff;
1605 c->status[i].predictor += vpdiff;
1607 c->status[i].step_index += table[delta & (~signmask)];
1609 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
1610 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
1612 *samples++ = c->status[i].predictor;
1613 if (samples >= samples_end) {
1614 av_log(avctx, AV_LOG_ERROR, "allocated output buffer is too small\n");
1623 case CODEC_ID_ADPCM_YAMAHA:
1624 while (src < buf + buf_size) {
1626 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
1628 *samples++ = adpcm_yamaha_expand_nibble(&c->status[1],
1631 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
1633 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
1639 case CODEC_ID_ADPCM_THP:
1642 unsigned int samplecnt;
1646 if (buf_size < 80) {
1647 av_log(avctx, AV_LOG_ERROR, "frame too small\n");
1652 samplecnt = bytestream_get_be32(&src);
1654 for (i = 0; i < 32; i++)
1655 table[0][i] = (int16_t)bytestream_get_be16(&src);
1657 /* Initialize the previous sample. */
1658 for (i = 0; i < 4; i++)
1659 prev[0][i] = (int16_t)bytestream_get_be16(&src);
1661 if (samplecnt >= (samples_end - samples) / (st + 1)) {
1662 av_log(avctx, AV_LOG_ERROR, "allocated output buffer is too small\n");
1666 for (ch = 0; ch <= st; ch++) {
1667 samples = (unsigned short *) data + ch;
1669 /* Read in every sample for this channel. */
1670 for (i = 0; i < samplecnt / 14; i++) {
1671 int index = (*src >> 4) & 7;
1672 unsigned int exp = 28 - (*src++ & 15);
1673 int factor1 = table[ch][index * 2];
1674 int factor2 = table[ch][index * 2 + 1];
1676 /* Decode 14 samples. */
1677 for (n = 0; n < 14; n++) {
1679 if(n&1) sampledat= *src++ <<28;
1680 else sampledat= (*src&0xF0)<<24;
1682 sampledat = ((prev[ch][0]*factor1
1683 + prev[ch][1]*factor2) >> 11) + (sampledat>>exp);
1684 *samples = av_clip_int16(sampledat);
1685 prev[ch][1] = prev[ch][0];
1686 prev[ch][0] = *samples++;
1688 /* In case of stereo, skip one sample, this sample
1689 is for the other channel. */
1695 /* In the previous loop, in case stereo is used, samples is
1696 increased exactly one time too often. */
1704 *data_size = (uint8_t *)samples - (uint8_t *)data;
1711 #define ADPCM_ENCODER(id,name,long_name_) \
1712 AVCodec ff_ ## name ## _encoder = { \
1714 AVMEDIA_TYPE_AUDIO, \
1716 sizeof(ADPCMContext), \
1717 adpcm_encode_init, \
1718 adpcm_encode_frame, \
1719 adpcm_encode_close, \
1721 .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE}, \
1722 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1725 #define ADPCM_ENCODER(id,name,long_name_)
1729 #define ADPCM_DECODER(id,name,long_name_) \
1730 AVCodec ff_ ## name ## _decoder = { \
1732 AVMEDIA_TYPE_AUDIO, \
1734 sizeof(ADPCMContext), \
1735 adpcm_decode_init, \
1738 adpcm_decode_frame, \
1739 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1742 #define ADPCM_DECODER(id,name,long_name_)
1745 #define ADPCM_CODEC(id,name,long_name_) \
1746 ADPCM_ENCODER(id,name,long_name_); ADPCM_DECODER(id,name,long_name_)
1748 /* Note: Do not forget to add new entries to the Makefile as well. */
1749 ADPCM_DECODER(CODEC_ID_ADPCM_4XM, adpcm_4xm, "ADPCM 4X Movie");
1750 ADPCM_DECODER(CODEC_ID_ADPCM_CT, adpcm_ct, "ADPCM Creative Technology");
1751 ADPCM_DECODER(CODEC_ID_ADPCM_EA, adpcm_ea, "ADPCM Electronic Arts");
1752 ADPCM_DECODER(CODEC_ID_ADPCM_EA_MAXIS_XA, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
1753 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R1, adpcm_ea_r1, "ADPCM Electronic Arts R1");
1754 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R2, adpcm_ea_r2, "ADPCM Electronic Arts R2");
1755 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R3, adpcm_ea_r3, "ADPCM Electronic Arts R3");
1756 ADPCM_DECODER(CODEC_ID_ADPCM_EA_XAS, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
1757 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv, "ADPCM IMA AMV");
1758 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
1759 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
1760 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
1761 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
1762 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_ISS, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
1763 ADPCM_CODEC (CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt, "ADPCM IMA QuickTime");
1764 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
1765 ADPCM_CODEC (CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav, "ADPCM IMA WAV");
1766 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws, "ADPCM IMA Westwood");
1767 ADPCM_CODEC (CODEC_ID_ADPCM_MS, adpcm_ms, "ADPCM Microsoft");
1768 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
1769 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
1770 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
1771 ADPCM_CODEC (CODEC_ID_ADPCM_SWF, adpcm_swf, "ADPCM Shockwave Flash");
1772 ADPCM_DECODER(CODEC_ID_ADPCM_THP, adpcm_thp, "ADPCM Nintendo Gamecube THP");
1773 ADPCM_DECODER(CODEC_ID_ADPCM_XA, adpcm_xa, "ADPCM CDROM XA");
1774 ADPCM_CODEC (CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha, "ADPCM Yamaha");