2 * Copyright (c) 2001-2003 The FFmpeg project
4 * first version by Francois Revol (revol@free.fr)
5 * fringe ADPCM codecs (e.g., DK3, DK4, Westwood)
6 * by Mike Melanson (melanson@pcisys.net)
7 * CD-ROM XA ADPCM codec by BERO
8 * EA ADPCM decoder by Robin Kay (komadori@myrealbox.com)
9 * EA ADPCM R1/R2/R3 decoder by Peter Ross (pross@xvid.org)
10 * EA IMA EACS decoder by Peter Ross (pross@xvid.org)
11 * EA IMA SEAD decoder by Peter Ross (pross@xvid.org)
12 * EA ADPCM XAS decoder by Peter Ross (pross@xvid.org)
13 * MAXIS EA ADPCM decoder by Robert Marston (rmarston@gmail.com)
14 * THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl)
15 * Argonaut Games ADPCM decoder by Zane van Iperen (zane@zanevaniperen.com)
16 * Simon & Schuster Interactive ADPCM decoder by Zane van Iperen (zane@zanevaniperen.com)
17 * Ubisoft ADPCM decoder by Zane van Iperen (zane@zanevaniperen.com)
18 * High Voltage Software ALP decoder by Zane van Iperen (zane@zanevaniperen.com)
19 * Cunning Developments decoder by Zane van Iperen (zane@zanevaniperen.com)
21 * This file is part of FFmpeg.
23 * FFmpeg is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU Lesser General Public
25 * License as published by the Free Software Foundation; either
26 * version 2.1 of the License, or (at your option) any later version.
28 * FFmpeg is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * Lesser General Public License for more details.
33 * You should have received a copy of the GNU Lesser General Public
34 * License along with FFmpeg; if not, write to the Free Software
35 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
39 #include "bytestream.h"
41 #include "adpcm_data.h"
47 * Features and limitations:
49 * Reference documents:
50 * http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs
51 * http://www.pcisys.net/~melanson/codecs/simpleaudio.html [dead]
52 * http://www.geocities.com/SiliconValley/8682/aud3.txt [dead]
53 * http://openquicktime.sourceforge.net/
54 * XAnim sources (xa_codec.c) http://xanim.polter.net/
55 * http://www.cs.ucla.edu/~leec/mediabench/applications.html [dead]
56 * SoX source code http://sox.sourceforge.net/
59 * http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html [dead]
60 * vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html [dead]
61 * readstr http://www.geocities.co.jp/Playtown/2004/
64 /* These are for CD-ROM XA ADPCM */
65 static const int8_t xa_adpcm_table[5][2] = {
73 static const int16_t ea_adpcm_table[] = {
81 // padded to zero where table size is less then 16
82 static const int8_t swf_index_tables[4][16] = {
84 /*3*/ { -1, -1, 2, 4 },
85 /*4*/ { -1, -1, -1, -1, 2, 4, 6, 8 },
86 /*5*/ { -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16 }
89 static const int8_t zork_index_table[8] = {
90 -1, -1, -1, 1, 4, 7, 10, 12,
93 static const int8_t mtf_index_table[16] = {
94 8, 6, 4, 2, -1, -1, -1, -1,
95 -1, -1, -1, -1, 2, 4, 6, 8,
100 typedef struct ADPCMDecodeContext {
101 ADPCMChannelStatus status[14];
102 int vqa_version; /**< VQA version. Used for ADPCM_IMA_WS */
104 } ADPCMDecodeContext;
106 static av_cold int adpcm_decode_init(AVCodecContext * avctx)
108 ADPCMDecodeContext *c = avctx->priv_data;
109 unsigned int min_channels = 1;
110 unsigned int max_channels = 2;
112 switch(avctx->codec->id) {
113 case AV_CODEC_ID_ADPCM_IMA_AMV:
114 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
117 case AV_CODEC_ID_ADPCM_DTK:
118 case AV_CODEC_ID_ADPCM_EA:
121 case AV_CODEC_ID_ADPCM_AFC:
122 case AV_CODEC_ID_ADPCM_EA_R1:
123 case AV_CODEC_ID_ADPCM_EA_R2:
124 case AV_CODEC_ID_ADPCM_EA_R3:
125 case AV_CODEC_ID_ADPCM_EA_XAS:
126 case AV_CODEC_ID_ADPCM_MS:
129 case AV_CODEC_ID_ADPCM_MTAF:
132 if (avctx->channels & 1) {
133 avpriv_request_sample(avctx, "channel count %d", avctx->channels);
134 return AVERROR_PATCHWELCOME;
137 case AV_CODEC_ID_ADPCM_PSX:
139 if (avctx->channels <= 0 || avctx->block_align % (16 * avctx->channels))
140 return AVERROR_INVALIDDATA;
142 case AV_CODEC_ID_ADPCM_IMA_DAT4:
143 case AV_CODEC_ID_ADPCM_THP:
144 case AV_CODEC_ID_ADPCM_THP_LE:
148 if (avctx->channels < min_channels || avctx->channels > max_channels) {
149 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
150 return AVERROR(EINVAL);
153 switch(avctx->codec->id) {
154 case AV_CODEC_ID_ADPCM_CT:
155 c->status[0].step = c->status[1].step = 511;
157 case AV_CODEC_ID_ADPCM_IMA_WAV:
158 if (avctx->bits_per_coded_sample < 2 || avctx->bits_per_coded_sample > 5)
159 return AVERROR_INVALIDDATA;
161 case AV_CODEC_ID_ADPCM_IMA_APC:
162 if (avctx->extradata && avctx->extradata_size >= 8) {
163 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata ), 18);
164 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 4), 18);
167 case AV_CODEC_ID_ADPCM_IMA_APM:
168 if (avctx->extradata) {
169 if (avctx->extradata_size >= 28) {
170 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 16), 18);
171 c->status[0].step_index = av_clip(AV_RL32(avctx->extradata + 20), 0, 88);
172 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 4), 18);
173 c->status[1].step_index = av_clip(AV_RL32(avctx->extradata + 8), 0, 88);
174 } else if (avctx->extradata_size >= 16) {
175 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 0), 18);
176 c->status[0].step_index = av_clip(AV_RL32(avctx->extradata + 4), 0, 88);
177 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 8), 18);
178 c->status[1].step_index = av_clip(AV_RL32(avctx->extradata + 12), 0, 88);
182 case AV_CODEC_ID_ADPCM_IMA_WS:
183 if (avctx->extradata && avctx->extradata_size >= 2)
184 c->vqa_version = AV_RL16(avctx->extradata);
186 case AV_CODEC_ID_ADPCM_ARGO:
187 if (avctx->bits_per_coded_sample != 4 || avctx->block_align != 17 * avctx->channels)
188 return AVERROR_INVALIDDATA;
190 case AV_CODEC_ID_ADPCM_ZORK:
191 if (avctx->bits_per_coded_sample != 8)
192 return AVERROR_INVALIDDATA;
198 switch (avctx->codec->id) {
199 case AV_CODEC_ID_ADPCM_AICA:
200 case AV_CODEC_ID_ADPCM_IMA_DAT4:
201 case AV_CODEC_ID_ADPCM_IMA_QT:
202 case AV_CODEC_ID_ADPCM_IMA_WAV:
203 case AV_CODEC_ID_ADPCM_4XM:
204 case AV_CODEC_ID_ADPCM_XA:
205 case AV_CODEC_ID_ADPCM_EA_R1:
206 case AV_CODEC_ID_ADPCM_EA_R2:
207 case AV_CODEC_ID_ADPCM_EA_R3:
208 case AV_CODEC_ID_ADPCM_EA_XAS:
209 case AV_CODEC_ID_ADPCM_THP:
210 case AV_CODEC_ID_ADPCM_THP_LE:
211 case AV_CODEC_ID_ADPCM_AFC:
212 case AV_CODEC_ID_ADPCM_DTK:
213 case AV_CODEC_ID_ADPCM_PSX:
214 case AV_CODEC_ID_ADPCM_MTAF:
215 case AV_CODEC_ID_ADPCM_ARGO:
216 case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
217 avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
219 case AV_CODEC_ID_ADPCM_IMA_WS:
220 avctx->sample_fmt = c->vqa_version == 3 ? AV_SAMPLE_FMT_S16P :
223 case AV_CODEC_ID_ADPCM_MS:
224 avctx->sample_fmt = avctx->channels > 2 ? AV_SAMPLE_FMT_S16P :
228 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
234 static inline int16_t adpcm_agm_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
236 int delta, pred, step, add;
241 add = (delta * 2 + 1) * step;
245 if ((nibble & 8) == 0)
246 pred = av_clip(pred + (add >> 3), -32767, 32767);
248 pred = av_clip(pred - (add >> 3), -32767, 32767);
255 c->step = av_clip(c->step * 2, 127, 24576);
273 c->step = av_clip(c->step, 127, 24576);
278 static inline int16_t adpcm_ima_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int shift)
282 int sign, delta, diff, step;
284 step = ff_adpcm_step_table[c->step_index];
285 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
286 step_index = av_clip(step_index, 0, 88);
290 /* perform direct multiplication instead of series of jumps proposed by
291 * the reference ADPCM implementation since modern CPUs can do the mults
293 diff = ((2 * delta + 1) * step) >> shift;
294 predictor = c->predictor;
295 if (sign) predictor -= diff;
296 else predictor += diff;
298 c->predictor = av_clip_int16(predictor);
299 c->step_index = step_index;
301 return (int16_t)c->predictor;
304 static inline int16_t adpcm_ima_alp_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int shift)
308 int sign, delta, diff, step;
310 step = ff_adpcm_step_table[c->step_index];
311 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
312 step_index = av_clip(step_index, 0, 88);
316 diff = (delta * step) >> shift;
317 predictor = c->predictor;
318 if (sign) predictor -= diff;
319 else predictor += diff;
321 c->predictor = av_clip_int16(predictor);
322 c->step_index = step_index;
324 return (int16_t)c->predictor;
327 static inline int16_t adpcm_ima_mtf_expand_nibble(ADPCMChannelStatus *c, int nibble)
329 int step_index, step, delta, predictor;
331 step = ff_adpcm_step_table[c->step_index];
333 delta = step * (2 * nibble - 15);
334 predictor = c->predictor + delta;
336 step_index = c->step_index + mtf_index_table[(unsigned)nibble];
337 c->predictor = av_clip_int16(predictor >> 4);
338 c->step_index = av_clip(step_index, 0, 88);
340 return (int16_t)c->predictor;
343 static inline int16_t adpcm_ima_cunning_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
349 nibble = sign_extend(nibble & 0xF, 4);
351 step = ff_adpcm_ima_cunning_step_table[c->step_index];
352 step_index = c->step_index + ff_adpcm_ima_cunning_index_table[abs(nibble)];
353 step_index = av_clip(step_index, 0, 60);
355 predictor = c->predictor + step * nibble;
357 c->predictor = av_clip_int16(predictor);
358 c->step_index = step_index;
363 static inline int16_t adpcm_ima_wav_expand_nibble(ADPCMChannelStatus *c, GetBitContext *gb, int bps)
365 int nibble, step_index, predictor, sign, delta, diff, step, shift;
368 nibble = get_bits_le(gb, bps),
369 step = ff_adpcm_step_table[c->step_index];
370 step_index = c->step_index + ff_adpcm_index_tables[bps - 2][nibble];
371 step_index = av_clip(step_index, 0, 88);
373 sign = nibble & (1 << shift);
374 delta = av_mod_uintp2(nibble, shift);
375 diff = ((2 * delta + 1) * step) >> shift;
376 predictor = c->predictor;
377 if (sign) predictor -= diff;
378 else predictor += diff;
380 c->predictor = av_clip_int16(predictor);
381 c->step_index = step_index;
383 return (int16_t)c->predictor;
386 static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble)
392 step = ff_adpcm_step_table[c->step_index];
393 step_index = c->step_index + ff_adpcm_index_table[nibble];
394 step_index = av_clip(step_index, 0, 88);
397 if (nibble & 4) diff += step;
398 if (nibble & 2) diff += step >> 1;
399 if (nibble & 1) diff += step >> 2;
402 predictor = c->predictor - diff;
404 predictor = c->predictor + diff;
406 c->predictor = av_clip_int16(predictor);
407 c->step_index = step_index;
412 static inline int16_t adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble)
416 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
417 predictor += ((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
419 c->sample2 = c->sample1;
420 c->sample1 = av_clip_int16(predictor);
421 c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8;
422 if (c->idelta < 16) c->idelta = 16;
423 if (c->idelta > INT_MAX/768) {
424 av_log(NULL, AV_LOG_WARNING, "idelta overflow\n");
425 c->idelta = INT_MAX/768;
431 static inline int16_t adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble)
433 int step_index, predictor, sign, delta, diff, step;
435 step = ff_adpcm_oki_step_table[c->step_index];
436 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
437 step_index = av_clip(step_index, 0, 48);
441 diff = ((2 * delta + 1) * step) >> 3;
442 predictor = c->predictor;
443 if (sign) predictor -= diff;
444 else predictor += diff;
446 c->predictor = av_clip_intp2(predictor, 11);
447 c->step_index = step_index;
449 return c->predictor * 16;
452 static inline int16_t adpcm_ct_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
454 int sign, delta, diff;
459 /* perform direct multiplication instead of series of jumps proposed by
460 * the reference ADPCM implementation since modern CPUs can do the mults
462 diff = ((2 * delta + 1) * c->step) >> 3;
463 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
464 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
465 c->predictor = av_clip_int16(c->predictor);
466 /* calculate new step and clamp it to range 511..32767 */
467 new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
468 c->step = av_clip(new_step, 511, 32767);
470 return (int16_t)c->predictor;
473 static inline int16_t adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int size, int shift)
475 int sign, delta, diff;
477 sign = nibble & (1<<(size-1));
478 delta = nibble & ((1<<(size-1))-1);
479 diff = delta << (7 + c->step + shift);
482 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
484 /* calculate new step */
485 if (delta >= (2*size - 3) && c->step < 3)
487 else if (delta == 0 && c->step > 0)
490 return (int16_t) c->predictor;
493 static inline int16_t adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
500 c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
501 c->predictor = av_clip_int16(c->predictor);
502 c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
503 c->step = av_clip(c->step, 127, 24576);
507 static inline int16_t adpcm_mtaf_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
509 c->predictor += ff_adpcm_mtaf_stepsize[c->step][nibble];
510 c->predictor = av_clip_int16(c->predictor);
511 c->step += ff_adpcm_index_table[nibble];
512 c->step = av_clip_uintp2(c->step, 5);
516 static inline int16_t adpcm_zork_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
518 int16_t index = c->step_index;
519 uint32_t lookup_sample = ff_adpcm_step_table[index];
523 sample += lookup_sample;
525 sample += lookup_sample >> 1;
527 sample += lookup_sample >> 2;
529 sample += lookup_sample >> 3;
531 sample += lookup_sample >> 4;
533 sample += lookup_sample >> 5;
535 sample += lookup_sample >> 6;
539 sample += c->predictor;
540 sample = av_clip_int16(sample);
542 index += zork_index_table[(nibble >> 4) & 7];
543 index = av_clip(index, 0, 88);
545 c->predictor = sample;
546 c->step_index = index;
551 static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1,
552 const uint8_t *in, ADPCMChannelStatus *left,
553 ADPCMChannelStatus *right, int channels, int sample_offset)
556 int shift,filter,f0,f1;
560 out0 += sample_offset;
564 out1 += sample_offset;
567 shift = 12 - (in[4+i*2] & 15);
568 filter = in[4+i*2] >> 4;
569 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
570 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
574 avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift);
577 f0 = xa_adpcm_table[filter][0];
578 f1 = xa_adpcm_table[filter][1];
586 t = sign_extend(d, 4);
587 s = t*(1<<shift) + ((s_1*f0 + s_2*f1+32)>>6);
589 s_1 = av_clip_int16(s);
596 s_1 = right->sample1;
597 s_2 = right->sample2;
600 shift = 12 - (in[5+i*2] & 15);
601 filter = in[5+i*2] >> 4;
602 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table) || shift < 0) {
603 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
607 avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift);
611 f0 = xa_adpcm_table[filter][0];
612 f1 = xa_adpcm_table[filter][1];
617 t = sign_extend(d >> 4, 4);
618 s = t*(1<<shift) + ((s_1*f0 + s_2*f1+32)>>6);
620 s_1 = av_clip_int16(s);
625 right->sample1 = s_1;
626 right->sample2 = s_2;
632 out0 += 28 * (3 - channels);
633 out1 += 28 * (3 - channels);
639 static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples)
641 ADPCMDecodeContext *c = avctx->priv_data;
644 int k0, signmask, nb_bits, count;
645 int size = buf_size*8;
648 init_get_bits(&gb, buf, size);
650 //read bits & initial values
651 nb_bits = get_bits(&gb, 2)+2;
652 table = swf_index_tables[nb_bits-2];
653 k0 = 1 << (nb_bits-2);
654 signmask = 1 << (nb_bits-1);
656 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
657 for (i = 0; i < avctx->channels; i++) {
658 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
659 c->status[i].step_index = get_bits(&gb, 6);
662 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
665 for (i = 0; i < avctx->channels; i++) {
666 // similar to IMA adpcm
667 int delta = get_bits(&gb, nb_bits);
668 int step = ff_adpcm_step_table[c->status[i].step_index];
669 int vpdiff = 0; // vpdiff = (delta+0.5)*step/4
680 if (delta & signmask)
681 c->status[i].predictor -= vpdiff;
683 c->status[i].predictor += vpdiff;
685 c->status[i].step_index += table[delta & (~signmask)];
687 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
688 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
690 *samples++ = c->status[i].predictor;
696 int16_t ff_adpcm_argo_expand_nibble(ADPCMChannelStatus *cs, int nibble, int shift, int flag)
698 int sample = sign_extend(nibble, 4) * (1 << shift);
701 sample += (8 * cs->sample1) - (4 * cs->sample2);
703 sample += 4 * cs->sample1;
705 sample = av_clip_int16(sample >> 2);
707 cs->sample2 = cs->sample1;
708 cs->sample1 = sample;
714 * Get the number of samples (per channel) that will be decoded from the packet.
715 * In one case, this is actually the maximum number of samples possible to
716 * decode with the given buf_size.
718 * @param[out] coded_samples set to the number of samples as coded in the
719 * packet, or 0 if the codec does not encode the
720 * number of samples in each frame.
721 * @param[out] approx_nb_samples set to non-zero if the number of samples
722 * returned is an approximation.
724 static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
725 int buf_size, int *coded_samples, int *approx_nb_samples)
727 ADPCMDecodeContext *s = avctx->priv_data;
729 int ch = avctx->channels;
730 int has_coded_samples = 0;
734 *approx_nb_samples = 0;
739 switch (avctx->codec->id) {
740 /* constant, only check buf_size */
741 case AV_CODEC_ID_ADPCM_EA_XAS:
742 if (buf_size < 76 * ch)
746 case AV_CODEC_ID_ADPCM_IMA_QT:
747 if (buf_size < 34 * ch)
751 /* simple 4-bit adpcm */
752 case AV_CODEC_ID_ADPCM_CT:
753 case AV_CODEC_ID_ADPCM_IMA_APC:
754 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
755 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
756 case AV_CODEC_ID_ADPCM_IMA_OKI:
757 case AV_CODEC_ID_ADPCM_IMA_WS:
758 case AV_CODEC_ID_ADPCM_YAMAHA:
759 case AV_CODEC_ID_ADPCM_AICA:
760 case AV_CODEC_ID_ADPCM_IMA_SSI:
761 case AV_CODEC_ID_ADPCM_IMA_APM:
762 case AV_CODEC_ID_ADPCM_IMA_ALP:
763 case AV_CODEC_ID_ADPCM_IMA_MTF:
764 nb_samples = buf_size * 2 / ch;
770 /* simple 4-bit adpcm, with header */
772 switch (avctx->codec->id) {
773 case AV_CODEC_ID_ADPCM_4XM:
774 case AV_CODEC_ID_ADPCM_AGM:
775 case AV_CODEC_ID_ADPCM_IMA_DAT4:
776 case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
777 case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
778 case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break;
779 case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break;
782 return (buf_size - header_size) * 2 / ch;
784 /* more complex formats */
785 switch (avctx->codec->id) {
786 case AV_CODEC_ID_ADPCM_EA:
787 has_coded_samples = 1;
788 *coded_samples = bytestream2_get_le32(gb);
789 *coded_samples -= *coded_samples % 28;
790 nb_samples = (buf_size - 12) / 30 * 28;
792 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
793 has_coded_samples = 1;
794 *coded_samples = bytestream2_get_le32(gb);
795 nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch;
797 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
798 nb_samples = (buf_size - ch) / ch * 2;
800 case AV_CODEC_ID_ADPCM_EA_R1:
801 case AV_CODEC_ID_ADPCM_EA_R2:
802 case AV_CODEC_ID_ADPCM_EA_R3:
803 /* maximum number of samples */
804 /* has internal offsets and a per-frame switch to signal raw 16-bit */
805 has_coded_samples = 1;
806 switch (avctx->codec->id) {
807 case AV_CODEC_ID_ADPCM_EA_R1:
808 header_size = 4 + 9 * ch;
809 *coded_samples = bytestream2_get_le32(gb);
811 case AV_CODEC_ID_ADPCM_EA_R2:
812 header_size = 4 + 5 * ch;
813 *coded_samples = bytestream2_get_le32(gb);
815 case AV_CODEC_ID_ADPCM_EA_R3:
816 header_size = 4 + 5 * ch;
817 *coded_samples = bytestream2_get_be32(gb);
820 *coded_samples -= *coded_samples % 28;
821 nb_samples = (buf_size - header_size) * 2 / ch;
822 nb_samples -= nb_samples % 28;
823 *approx_nb_samples = 1;
825 case AV_CODEC_ID_ADPCM_IMA_DK3:
826 if (avctx->block_align > 0)
827 buf_size = FFMIN(buf_size, avctx->block_align);
828 nb_samples = ((buf_size - 16) * 2 / 3 * 4) / ch;
830 case AV_CODEC_ID_ADPCM_IMA_DK4:
831 if (avctx->block_align > 0)
832 buf_size = FFMIN(buf_size, avctx->block_align);
833 if (buf_size < 4 * ch)
834 return AVERROR_INVALIDDATA;
835 nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch;
837 case AV_CODEC_ID_ADPCM_IMA_RAD:
838 if (avctx->block_align > 0)
839 buf_size = FFMIN(buf_size, avctx->block_align);
840 nb_samples = (buf_size - 4 * ch) * 2 / ch;
842 case AV_CODEC_ID_ADPCM_IMA_WAV:
844 int bsize = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
845 int bsamples = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
846 if (avctx->block_align > 0)
847 buf_size = FFMIN(buf_size, avctx->block_align);
848 if (buf_size < 4 * ch)
849 return AVERROR_INVALIDDATA;
850 nb_samples = 1 + (buf_size - 4 * ch) / (bsize * ch) * bsamples;
853 case AV_CODEC_ID_ADPCM_MS:
854 if (avctx->block_align > 0)
855 buf_size = FFMIN(buf_size, avctx->block_align);
856 nb_samples = (buf_size - 6 * ch) * 2 / ch;
858 case AV_CODEC_ID_ADPCM_MTAF:
859 if (avctx->block_align > 0)
860 buf_size = FFMIN(buf_size, avctx->block_align);
861 nb_samples = (buf_size - 16 * (ch / 2)) * 2 / ch;
863 case AV_CODEC_ID_ADPCM_SBPRO_2:
864 case AV_CODEC_ID_ADPCM_SBPRO_3:
865 case AV_CODEC_ID_ADPCM_SBPRO_4:
867 int samples_per_byte;
868 switch (avctx->codec->id) {
869 case AV_CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break;
870 case AV_CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break;
871 case AV_CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break;
873 if (!s->status[0].step_index) {
875 return AVERROR_INVALIDDATA;
879 nb_samples += buf_size * samples_per_byte / ch;
882 case AV_CODEC_ID_ADPCM_SWF:
884 int buf_bits = buf_size * 8 - 2;
885 int nbits = (bytestream2_get_byte(gb) >> 6) + 2;
886 int block_hdr_size = 22 * ch;
887 int block_size = block_hdr_size + nbits * ch * 4095;
888 int nblocks = buf_bits / block_size;
889 int bits_left = buf_bits - nblocks * block_size;
890 nb_samples = nblocks * 4096;
891 if (bits_left >= block_hdr_size)
892 nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch);
895 case AV_CODEC_ID_ADPCM_THP:
896 case AV_CODEC_ID_ADPCM_THP_LE:
897 if (avctx->extradata) {
898 nb_samples = buf_size * 14 / (8 * ch);
901 has_coded_samples = 1;
902 bytestream2_skip(gb, 4); // channel size
903 *coded_samples = (avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE) ?
904 bytestream2_get_le32(gb) :
905 bytestream2_get_be32(gb);
906 buf_size -= 8 + 36 * ch;
908 nb_samples = buf_size / 8 * 14;
909 if (buf_size % 8 > 1)
910 nb_samples += (buf_size % 8 - 1) * 2;
911 *approx_nb_samples = 1;
913 case AV_CODEC_ID_ADPCM_AFC:
914 nb_samples = buf_size / (9 * ch) * 16;
916 case AV_CODEC_ID_ADPCM_XA:
917 nb_samples = (buf_size / 128) * 224 / ch;
919 case AV_CODEC_ID_ADPCM_DTK:
920 case AV_CODEC_ID_ADPCM_PSX:
921 nb_samples = buf_size / (16 * ch) * 28;
923 case AV_CODEC_ID_ADPCM_ARGO:
924 nb_samples = buf_size / avctx->block_align * 32;
926 case AV_CODEC_ID_ADPCM_ZORK:
927 nb_samples = buf_size / ch;
931 /* validate coded sample count */
932 if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
933 return AVERROR_INVALIDDATA;
938 static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
939 int *got_frame_ptr, AVPacket *avpkt)
941 AVFrame *frame = data;
942 const uint8_t *buf = avpkt->data;
943 int buf_size = avpkt->size;
944 ADPCMDecodeContext *c = avctx->priv_data;
945 ADPCMChannelStatus *cs;
946 int n, m, channel, i;
951 int nb_samples, coded_samples, approx_nb_samples, ret;
954 bytestream2_init(&gb, buf, buf_size);
955 nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples, &approx_nb_samples);
956 if (nb_samples <= 0) {
957 av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
958 return AVERROR_INVALIDDATA;
961 /* get output buffer */
962 frame->nb_samples = nb_samples;
963 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
965 samples = (int16_t *)frame->data[0];
966 samples_p = (int16_t **)frame->extended_data;
968 /* use coded_samples when applicable */
969 /* it is always <= nb_samples, so the output buffer will be large enough */
971 if (!approx_nb_samples && coded_samples != nb_samples)
972 av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
973 frame->nb_samples = nb_samples = coded_samples;
976 st = avctx->channels == 2 ? 1 : 0;
978 switch(avctx->codec->id) {
979 case AV_CODEC_ID_ADPCM_IMA_QT:
980 /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
981 Channel data is interleaved per-chunk. */
982 for (channel = 0; channel < avctx->channels; channel++) {
985 cs = &(c->status[channel]);
986 /* (pppppp) (piiiiiii) */
988 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
989 predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
990 step_index = predictor & 0x7F;
993 if (cs->step_index == step_index) {
994 int diff = predictor - cs->predictor;
1001 cs->step_index = step_index;
1002 cs->predictor = predictor;
1005 if (cs->step_index > 88u){
1006 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1007 channel, cs->step_index);
1008 return AVERROR_INVALIDDATA;
1011 samples = samples_p[channel];
1013 for (m = 0; m < 64; m += 2) {
1014 int byte = bytestream2_get_byteu(&gb);
1015 samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F);
1016 samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 );
1020 case AV_CODEC_ID_ADPCM_IMA_WAV:
1021 for(i=0; i<avctx->channels; i++){
1022 cs = &(c->status[i]);
1023 cs->predictor = samples_p[i][0] = sign_extend(bytestream2_get_le16u(&gb), 16);
1025 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1026 if (cs->step_index > 88u){
1027 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1029 return AVERROR_INVALIDDATA;
1033 if (avctx->bits_per_coded_sample != 4) {
1034 int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
1035 int block_size = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
1036 uint8_t temp[20 + AV_INPUT_BUFFER_PADDING_SIZE] = { 0 };
1039 for (n = 0; n < (nb_samples - 1) / samples_per_block; n++) {
1040 for (i = 0; i < avctx->channels; i++) {
1044 samples = &samples_p[i][1 + n * samples_per_block];
1045 for (j = 0; j < block_size; j++) {
1046 temp[j] = buf[4 * avctx->channels + block_size * n * avctx->channels +
1047 (j % 4) + (j / 4) * (avctx->channels * 4) + i * 4];
1049 ret = init_get_bits8(&g, (const uint8_t *)&temp, block_size);
1052 for (m = 0; m < samples_per_block; m++) {
1053 samples[m] = adpcm_ima_wav_expand_nibble(cs, &g,
1054 avctx->bits_per_coded_sample);
1058 bytestream2_skip(&gb, avctx->block_align - avctx->channels * 4);
1060 for (n = 0; n < (nb_samples - 1) / 8; n++) {
1061 for (i = 0; i < avctx->channels; i++) {
1063 samples = &samples_p[i][1 + n * 8];
1064 for (m = 0; m < 8; m += 2) {
1065 int v = bytestream2_get_byteu(&gb);
1066 samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
1067 samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
1073 case AV_CODEC_ID_ADPCM_4XM:
1074 for (i = 0; i < avctx->channels; i++)
1075 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1077 for (i = 0; i < avctx->channels; i++) {
1078 c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1079 if (c->status[i].step_index > 88u) {
1080 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1081 i, c->status[i].step_index);
1082 return AVERROR_INVALIDDATA;
1086 for (i = 0; i < avctx->channels; i++) {
1087 samples = (int16_t *)frame->data[i];
1089 for (n = nb_samples >> 1; n > 0; n--) {
1090 int v = bytestream2_get_byteu(&gb);
1091 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
1092 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
1096 case AV_CODEC_ID_ADPCM_AGM:
1097 for (i = 0; i < avctx->channels; i++)
1098 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1099 for (i = 0; i < avctx->channels; i++)
1100 c->status[i].step = sign_extend(bytestream2_get_le16u(&gb), 16);
1102 for (n = 0; n < nb_samples >> (1 - st); n++) {
1103 int v = bytestream2_get_byteu(&gb);
1104 *samples++ = adpcm_agm_expand_nibble(&c->status[0], v & 0xF);
1105 *samples++ = adpcm_agm_expand_nibble(&c->status[st], v >> 4 );
1108 case AV_CODEC_ID_ADPCM_MS:
1110 int block_predictor;
1112 if (avctx->channels > 2) {
1113 for (channel = 0; channel < avctx->channels; channel++) {
1114 samples = samples_p[channel];
1115 block_predictor = bytestream2_get_byteu(&gb);
1116 if (block_predictor > 6) {
1117 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[%d] = %d\n",
1118 channel, block_predictor);
1119 return AVERROR_INVALIDDATA;
1121 c->status[channel].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1122 c->status[channel].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1123 c->status[channel].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1124 c->status[channel].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1125 c->status[channel].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1126 *samples++ = c->status[channel].sample2;
1127 *samples++ = c->status[channel].sample1;
1128 for(n = (nb_samples - 2) >> 1; n > 0; n--) {
1129 int byte = bytestream2_get_byteu(&gb);
1130 *samples++ = adpcm_ms_expand_nibble(&c->status[channel], byte >> 4 );
1131 *samples++ = adpcm_ms_expand_nibble(&c->status[channel], byte & 0x0F);
1135 block_predictor = bytestream2_get_byteu(&gb);
1136 if (block_predictor > 6) {
1137 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n",
1139 return AVERROR_INVALIDDATA;
1141 c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1142 c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1144 block_predictor = bytestream2_get_byteu(&gb);
1145 if (block_predictor > 6) {
1146 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n",
1148 return AVERROR_INVALIDDATA;
1150 c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1151 c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1153 c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1155 c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1158 c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1159 if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1160 c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1161 if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1163 *samples++ = c->status[0].sample2;
1164 if (st) *samples++ = c->status[1].sample2;
1165 *samples++ = c->status[0].sample1;
1166 if (st) *samples++ = c->status[1].sample1;
1167 for(n = (nb_samples - 2) >> (1 - st); n > 0; n--) {
1168 int byte = bytestream2_get_byteu(&gb);
1169 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 );
1170 *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F);
1175 case AV_CODEC_ID_ADPCM_MTAF:
1176 for (channel = 0; channel < avctx->channels; channel+=2) {
1177 bytestream2_skipu(&gb, 4);
1178 c->status[channel ].step = bytestream2_get_le16u(&gb) & 0x1f;
1179 c->status[channel + 1].step = bytestream2_get_le16u(&gb) & 0x1f;
1180 c->status[channel ].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1181 bytestream2_skipu(&gb, 2);
1182 c->status[channel + 1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1183 bytestream2_skipu(&gb, 2);
1184 for (n = 0; n < nb_samples; n+=2) {
1185 int v = bytestream2_get_byteu(&gb);
1186 samples_p[channel][n ] = adpcm_mtaf_expand_nibble(&c->status[channel], v & 0x0F);
1187 samples_p[channel][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel], v >> 4 );
1189 for (n = 0; n < nb_samples; n+=2) {
1190 int v = bytestream2_get_byteu(&gb);
1191 samples_p[channel + 1][n ] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v & 0x0F);
1192 samples_p[channel + 1][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v >> 4 );
1196 case AV_CODEC_ID_ADPCM_IMA_DK4:
1197 for (channel = 0; channel < avctx->channels; channel++) {
1198 cs = &c->status[channel];
1199 cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16);
1200 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1201 if (cs->step_index > 88u){
1202 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1203 channel, cs->step_index);
1204 return AVERROR_INVALIDDATA;
1207 for (n = (nb_samples - 1) >> (1 - st); n > 0; n--) {
1208 int v = bytestream2_get_byteu(&gb);
1209 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
1210 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
1213 case AV_CODEC_ID_ADPCM_IMA_DK3:
1217 int decode_top_nibble_next = 0;
1219 const int16_t *samples_end = samples + avctx->channels * nb_samples;
1221 bytestream2_skipu(&gb, 10);
1222 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1223 c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1224 c->status[0].step_index = bytestream2_get_byteu(&gb);
1225 c->status[1].step_index = bytestream2_get_byteu(&gb);
1226 if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){
1227 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n",
1228 c->status[0].step_index, c->status[1].step_index);
1229 return AVERROR_INVALIDDATA;
1231 /* sign extend the predictors */
1232 diff_channel = c->status[1].predictor;
1234 /* DK3 ADPCM support macro */
1235 #define DK3_GET_NEXT_NIBBLE() \
1236 if (decode_top_nibble_next) { \
1237 nibble = last_byte >> 4; \
1238 decode_top_nibble_next = 0; \
1240 last_byte = bytestream2_get_byteu(&gb); \
1241 nibble = last_byte & 0x0F; \
1242 decode_top_nibble_next = 1; \
1245 while (samples < samples_end) {
1247 /* for this algorithm, c->status[0] is the sum channel and
1248 * c->status[1] is the diff channel */
1250 /* process the first predictor of the sum channel */
1251 DK3_GET_NEXT_NIBBLE();
1252 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1254 /* process the diff channel predictor */
1255 DK3_GET_NEXT_NIBBLE();
1256 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
1258 /* process the first pair of stereo PCM samples */
1259 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1260 *samples++ = c->status[0].predictor + c->status[1].predictor;
1261 *samples++ = c->status[0].predictor - c->status[1].predictor;
1263 /* process the second predictor of the sum channel */
1264 DK3_GET_NEXT_NIBBLE();
1265 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1267 /* process the second pair of stereo PCM samples */
1268 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1269 *samples++ = c->status[0].predictor + c->status[1].predictor;
1270 *samples++ = c->status[0].predictor - c->status[1].predictor;
1273 if ((bytestream2_tell(&gb) & 1))
1274 bytestream2_skip(&gb, 1);
1277 case AV_CODEC_ID_ADPCM_IMA_ISS:
1278 for (channel = 0; channel < avctx->channels; channel++) {
1279 cs = &c->status[channel];
1280 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1281 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1282 if (cs->step_index > 88u){
1283 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1284 channel, cs->step_index);
1285 return AVERROR_INVALIDDATA;
1289 for (n = nb_samples >> (1 - st); n > 0; n--) {
1291 int v = bytestream2_get_byteu(&gb);
1292 /* nibbles are swapped for mono */
1300 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
1301 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
1304 case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
1305 for (channel = 0; channel < avctx->channels; channel++) {
1306 cs = &c->status[channel];
1307 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1308 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1309 if (cs->step_index > 88u){
1310 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1311 channel, cs->step_index);
1312 return AVERROR_INVALIDDATA;
1316 for (int subframe = 0; subframe < nb_samples / 256; subframe++) {
1317 for (channel = 0; channel < avctx->channels; channel++) {
1318 samples = samples_p[channel] + 256 * subframe;
1319 for (n = 0; n < 256; n += 2) {
1320 int v = bytestream2_get_byteu(&gb);
1321 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1322 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1327 case AV_CODEC_ID_ADPCM_IMA_DAT4:
1328 for (channel = 0; channel < avctx->channels; channel++) {
1329 cs = &c->status[channel];
1330 samples = samples_p[channel];
1331 bytestream2_skip(&gb, 4);
1332 for (n = 0; n < nb_samples; n += 2) {
1333 int v = bytestream2_get_byteu(&gb);
1334 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
1335 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
1339 case AV_CODEC_ID_ADPCM_IMA_APC:
1340 for (n = nb_samples >> (1 - st); n > 0; n--) {
1341 int v = bytestream2_get_byteu(&gb);
1342 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
1343 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
1346 case AV_CODEC_ID_ADPCM_IMA_SSI:
1347 for (n = nb_samples >> (1 - st); n > 0; n--) {
1348 int v = bytestream2_get_byteu(&gb);
1349 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0], v >> 4 );
1350 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0x0F);
1353 case AV_CODEC_ID_ADPCM_IMA_APM:
1354 for (n = nb_samples / 2; n > 0; n--) {
1355 for (channel = 0; channel < avctx->channels; channel++) {
1356 int v = bytestream2_get_byteu(&gb);
1357 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[channel], v >> 4 );
1358 samples[st] = adpcm_ima_qt_expand_nibble(&c->status[channel], v & 0x0F);
1360 samples += avctx->channels;
1363 case AV_CODEC_ID_ADPCM_IMA_ALP:
1364 for (n = nb_samples / 2; n > 0; n--) {
1365 for (channel = 0; channel < avctx->channels; channel++) {
1366 int v = bytestream2_get_byteu(&gb);
1367 *samples++ = adpcm_ima_alp_expand_nibble(&c->status[channel], v >> 4 , 2);
1368 samples[st] = adpcm_ima_alp_expand_nibble(&c->status[channel], v & 0x0F, 2);
1370 samples += avctx->channels;
1373 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
1374 for (n = 0; n < nb_samples / 2; n++) {
1375 int v = bytestream2_get_byteu(&gb);
1376 *samples++ = adpcm_ima_cunning_expand_nibble(&c->status[0], v & 0x0F);
1377 *samples++ = adpcm_ima_cunning_expand_nibble(&c->status[0], v >> 4);
1380 case AV_CODEC_ID_ADPCM_IMA_OKI:
1381 for (n = nb_samples >> (1 - st); n > 0; n--) {
1382 int v = bytestream2_get_byteu(&gb);
1383 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 );
1384 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F);
1387 case AV_CODEC_ID_ADPCM_IMA_RAD:
1388 for (channel = 0; channel < avctx->channels; channel++) {
1389 cs = &c->status[channel];
1390 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1391 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1392 if (cs->step_index > 88u){
1393 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1394 channel, cs->step_index);
1395 return AVERROR_INVALIDDATA;
1398 for (n = 0; n < nb_samples / 2; n++) {
1401 byte[0] = bytestream2_get_byteu(&gb);
1403 byte[1] = bytestream2_get_byteu(&gb);
1404 for(channel = 0; channel < avctx->channels; channel++) {
1405 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] & 0x0F, 3);
1407 for(channel = 0; channel < avctx->channels; channel++) {
1408 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] >> 4 , 3);
1412 case AV_CODEC_ID_ADPCM_IMA_WS:
1413 if (c->vqa_version == 3) {
1414 for (channel = 0; channel < avctx->channels; channel++) {
1415 int16_t *smp = samples_p[channel];
1417 for (n = nb_samples / 2; n > 0; n--) {
1418 int v = bytestream2_get_byteu(&gb);
1419 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1420 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1424 for (n = nb_samples / 2; n > 0; n--) {
1425 for (channel = 0; channel < avctx->channels; channel++) {
1426 int v = bytestream2_get_byteu(&gb);
1427 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1428 samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1430 samples += avctx->channels;
1433 bytestream2_seek(&gb, 0, SEEK_END);
1435 case AV_CODEC_ID_ADPCM_XA:
1437 int16_t *out0 = samples_p[0];
1438 int16_t *out1 = samples_p[1];
1439 int samples_per_block = 28 * (3 - avctx->channels) * 4;
1440 int sample_offset = 0;
1441 int bytes_remaining;
1442 while (bytestream2_get_bytes_left(&gb) >= 128) {
1443 if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb),
1444 &c->status[0], &c->status[1],
1445 avctx->channels, sample_offset)) < 0)
1447 bytestream2_skipu(&gb, 128);
1448 sample_offset += samples_per_block;
1450 /* Less than a full block of data left, e.g. when reading from
1451 * 2324 byte per sector XA; the remainder is padding */
1452 bytes_remaining = bytestream2_get_bytes_left(&gb);
1453 if (bytes_remaining > 0) {
1454 bytestream2_skip(&gb, bytes_remaining);
1458 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
1459 for (i=0; i<=st; i++) {
1460 c->status[i].step_index = bytestream2_get_le32u(&gb);
1461 if (c->status[i].step_index > 88u) {
1462 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1463 i, c->status[i].step_index);
1464 return AVERROR_INVALIDDATA;
1467 for (i=0; i<=st; i++) {
1468 c->status[i].predictor = bytestream2_get_le32u(&gb);
1469 if (FFABS((int64_t)c->status[i].predictor) > (1<<16))
1470 return AVERROR_INVALIDDATA;
1473 for (n = nb_samples >> (1 - st); n > 0; n--) {
1474 int byte = bytestream2_get_byteu(&gb);
1475 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3);
1476 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3);
1479 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1480 for (n = nb_samples >> (1 - st); n > 0; n--) {
1481 int byte = bytestream2_get_byteu(&gb);
1482 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6);
1483 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6);
1486 case AV_CODEC_ID_ADPCM_EA:
1488 int previous_left_sample, previous_right_sample;
1489 int current_left_sample, current_right_sample;
1490 int next_left_sample, next_right_sample;
1491 int coeff1l, coeff2l, coeff1r, coeff2r;
1492 int shift_left, shift_right;
1494 /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
1495 each coding 28 stereo samples. */
1497 if(avctx->channels != 2)
1498 return AVERROR_INVALIDDATA;
1500 current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1501 previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1502 current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1503 previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1505 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1506 int byte = bytestream2_get_byteu(&gb);
1507 coeff1l = ea_adpcm_table[ byte >> 4 ];
1508 coeff2l = ea_adpcm_table[(byte >> 4 ) + 4];
1509 coeff1r = ea_adpcm_table[ byte & 0x0F];
1510 coeff2r = ea_adpcm_table[(byte & 0x0F) + 4];
1512 byte = bytestream2_get_byteu(&gb);
1513 shift_left = 20 - (byte >> 4);
1514 shift_right = 20 - (byte & 0x0F);
1516 for (count2 = 0; count2 < 28; count2++) {
1517 byte = bytestream2_get_byteu(&gb);
1518 next_left_sample = sign_extend(byte >> 4, 4) * (1 << shift_left);
1519 next_right_sample = sign_extend(byte, 4) * (1 << shift_right);
1521 next_left_sample = (next_left_sample +
1522 (current_left_sample * coeff1l) +
1523 (previous_left_sample * coeff2l) + 0x80) >> 8;
1524 next_right_sample = (next_right_sample +
1525 (current_right_sample * coeff1r) +
1526 (previous_right_sample * coeff2r) + 0x80) >> 8;
1528 previous_left_sample = current_left_sample;
1529 current_left_sample = av_clip_int16(next_left_sample);
1530 previous_right_sample = current_right_sample;
1531 current_right_sample = av_clip_int16(next_right_sample);
1532 *samples++ = current_left_sample;
1533 *samples++ = current_right_sample;
1537 bytestream2_skip(&gb, 2); // Skip terminating 0x0000
1541 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
1543 int coeff[2][2], shift[2];
1545 for(channel = 0; channel < avctx->channels; channel++) {
1546 int byte = bytestream2_get_byteu(&gb);
1548 coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i];
1549 shift[channel] = 20 - (byte & 0x0F);
1551 for (count1 = 0; count1 < nb_samples / 2; count1++) {
1554 byte[0] = bytestream2_get_byteu(&gb);
1555 if (st) byte[1] = bytestream2_get_byteu(&gb);
1556 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1557 for(channel = 0; channel < avctx->channels; channel++) {
1558 int sample = sign_extend(byte[channel] >> i, 4) * (1 << shift[channel]);
1560 c->status[channel].sample1 * coeff[channel][0] +
1561 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1562 c->status[channel].sample2 = c->status[channel].sample1;
1563 c->status[channel].sample1 = av_clip_int16(sample);
1564 *samples++ = c->status[channel].sample1;
1568 bytestream2_seek(&gb, 0, SEEK_END);
1571 case AV_CODEC_ID_ADPCM_EA_R1:
1572 case AV_CODEC_ID_ADPCM_EA_R2:
1573 case AV_CODEC_ID_ADPCM_EA_R3: {
1574 /* channel numbering
1576 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1577 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1578 const int big_endian = avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R3;
1579 int previous_sample, current_sample, next_sample;
1582 unsigned int channel;
1587 for (channel=0; channel<avctx->channels; channel++)
1588 offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) :
1589 bytestream2_get_le32(&gb)) +
1590 (avctx->channels + 1) * 4;
1592 for (channel=0; channel<avctx->channels; channel++) {
1593 bytestream2_seek(&gb, offsets[channel], SEEK_SET);
1594 samplesC = samples_p[channel];
1596 if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) {
1597 current_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1598 previous_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1600 current_sample = c->status[channel].predictor;
1601 previous_sample = c->status[channel].prev_sample;
1604 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1605 int byte = bytestream2_get_byte(&gb);
1606 if (byte == 0xEE) { /* only seen in R2 and R3 */
1607 current_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1608 previous_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1610 for (count2=0; count2<28; count2++)
1611 *samplesC++ = sign_extend(bytestream2_get_be16(&gb), 16);
1613 coeff1 = ea_adpcm_table[ byte >> 4 ];
1614 coeff2 = ea_adpcm_table[(byte >> 4) + 4];
1615 shift = 20 - (byte & 0x0F);
1617 for (count2=0; count2<28; count2++) {
1619 next_sample = (unsigned)sign_extend(byte, 4) << shift;
1621 byte = bytestream2_get_byte(&gb);
1622 next_sample = (unsigned)sign_extend(byte >> 4, 4) << shift;
1625 next_sample += (current_sample * coeff1) +
1626 (previous_sample * coeff2);
1627 next_sample = av_clip_int16(next_sample >> 8);
1629 previous_sample = current_sample;
1630 current_sample = next_sample;
1631 *samplesC++ = current_sample;
1637 } else if (count != count1) {
1638 av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
1639 count = FFMAX(count, count1);
1642 if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) {
1643 c->status[channel].predictor = current_sample;
1644 c->status[channel].prev_sample = previous_sample;
1648 frame->nb_samples = count * 28;
1649 bytestream2_seek(&gb, 0, SEEK_END);
1652 case AV_CODEC_ID_ADPCM_EA_XAS:
1653 for (channel=0; channel<avctx->channels; channel++) {
1654 int coeff[2][4], shift[4];
1655 int16_t *s = samples_p[channel];
1656 for (n = 0; n < 4; n++, s += 32) {
1657 int val = sign_extend(bytestream2_get_le16u(&gb), 16);
1659 coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i];
1662 val = sign_extend(bytestream2_get_le16u(&gb), 16);
1663 shift[n] = 20 - (val & 0x0F);
1667 for (m=2; m<32; m+=2) {
1668 s = &samples_p[channel][m];
1669 for (n = 0; n < 4; n++, s += 32) {
1671 int byte = bytestream2_get_byteu(&gb);
1673 level = sign_extend(byte >> 4, 4) * (1 << shift[n]);
1674 pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n];
1675 s[0] = av_clip_int16((level + pred + 0x80) >> 8);
1677 level = sign_extend(byte, 4) * (1 << shift[n]);
1678 pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n];
1679 s[1] = av_clip_int16((level + pred + 0x80) >> 8);
1684 case AV_CODEC_ID_ADPCM_IMA_AMV:
1685 av_assert0(avctx->channels == 1);
1687 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1688 c->status[0].step_index = bytestream2_get_byteu(&gb);
1689 bytestream2_skipu(&gb, 5);
1690 if (c->status[0].step_index > 88u) {
1691 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1692 c->status[0].step_index);
1693 return AVERROR_INVALIDDATA;
1696 for (n = nb_samples >> 1; n > 0; n--) {
1697 int v = bytestream2_get_byteu(&gb);
1699 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3);
1700 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3);
1703 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1704 for (i = 0; i < avctx->channels; i++) {
1705 c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
1706 c->status[i].step_index = bytestream2_get_byteu(&gb);
1707 bytestream2_skipu(&gb, 1);
1708 if (c->status[i].step_index > 88u) {
1709 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1710 c->status[i].step_index);
1711 return AVERROR_INVALIDDATA;
1715 for (n = nb_samples >> (1 - st); n > 0; n--) {
1716 int v = bytestream2_get_byteu(&gb);
1718 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4 );
1719 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf);
1722 case AV_CODEC_ID_ADPCM_CT:
1723 for (n = nb_samples >> (1 - st); n > 0; n--) {
1724 int v = bytestream2_get_byteu(&gb);
1725 *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
1726 *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
1729 case AV_CODEC_ID_ADPCM_SBPRO_4:
1730 case AV_CODEC_ID_ADPCM_SBPRO_3:
1731 case AV_CODEC_ID_ADPCM_SBPRO_2:
1732 if (!c->status[0].step_index) {
1733 /* the first byte is a raw sample */
1734 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1736 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1737 c->status[0].step_index = 1;
1740 if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) {
1741 for (n = nb_samples >> (1 - st); n > 0; n--) {
1742 int byte = bytestream2_get_byteu(&gb);
1743 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1745 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1748 } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) {
1749 for (n = (nb_samples<<st) / 3; n > 0; n--) {
1750 int byte = bytestream2_get_byteu(&gb);
1751 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1753 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1754 (byte >> 2) & 0x07, 3, 0);
1755 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1759 for (n = nb_samples >> (2 - st); n > 0; n--) {
1760 int byte = bytestream2_get_byteu(&gb);
1761 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1763 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1764 (byte >> 4) & 0x03, 2, 2);
1765 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1766 (byte >> 2) & 0x03, 2, 2);
1767 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1772 case AV_CODEC_ID_ADPCM_SWF:
1773 adpcm_swf_decode(avctx, buf, buf_size, samples);
1774 bytestream2_seek(&gb, 0, SEEK_END);
1776 case AV_CODEC_ID_ADPCM_YAMAHA:
1777 for (n = nb_samples >> (1 - st); n > 0; n--) {
1778 int v = bytestream2_get_byteu(&gb);
1779 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
1780 *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
1783 case AV_CODEC_ID_ADPCM_AICA:
1784 if (!c->has_status) {
1785 for (channel = 0; channel < avctx->channels; channel++)
1786 c->status[channel].step = 0;
1789 for (channel = 0; channel < avctx->channels; channel++) {
1790 samples = samples_p[channel];
1791 for (n = nb_samples >> 1; n > 0; n--) {
1792 int v = bytestream2_get_byteu(&gb);
1793 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v & 0x0F);
1794 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v >> 4 );
1798 case AV_CODEC_ID_ADPCM_AFC:
1800 int samples_per_block;
1803 if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) {
1804 samples_per_block = avctx->extradata[0] / 16;
1805 blocks = nb_samples / avctx->extradata[0];
1807 samples_per_block = nb_samples / 16;
1811 for (m = 0; m < blocks; m++) {
1812 for (channel = 0; channel < avctx->channels; channel++) {
1813 int prev1 = c->status[channel].sample1;
1814 int prev2 = c->status[channel].sample2;
1816 samples = samples_p[channel] + m * 16;
1817 /* Read in every sample for this channel. */
1818 for (i = 0; i < samples_per_block; i++) {
1819 int byte = bytestream2_get_byteu(&gb);
1820 int scale = 1 << (byte >> 4);
1821 int index = byte & 0xf;
1822 int factor1 = ff_adpcm_afc_coeffs[0][index];
1823 int factor2 = ff_adpcm_afc_coeffs[1][index];
1825 /* Decode 16 samples. */
1826 for (n = 0; n < 16; n++) {
1830 sampledat = sign_extend(byte, 4);
1832 byte = bytestream2_get_byteu(&gb);
1833 sampledat = sign_extend(byte >> 4, 4);
1836 sampledat = ((prev1 * factor1 + prev2 * factor2) >> 11) +
1838 *samples = av_clip_int16(sampledat);
1844 c->status[channel].sample1 = prev1;
1845 c->status[channel].sample2 = prev2;
1848 bytestream2_seek(&gb, 0, SEEK_END);
1851 case AV_CODEC_ID_ADPCM_THP:
1852 case AV_CODEC_ID_ADPCM_THP_LE:
1857 #define THP_GET16(g) \
1859 avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE ? \
1860 bytestream2_get_le16u(&(g)) : \
1861 bytestream2_get_be16u(&(g)), 16)
1863 if (avctx->extradata) {
1865 if (avctx->extradata_size < 32 * avctx->channels) {
1866 av_log(avctx, AV_LOG_ERROR, "Missing coeff table\n");
1867 return AVERROR_INVALIDDATA;
1870 bytestream2_init(&tb, avctx->extradata, avctx->extradata_size);
1871 for (i = 0; i < avctx->channels; i++)
1872 for (n = 0; n < 16; n++)
1873 table[i][n] = THP_GET16(tb);
1875 for (i = 0; i < avctx->channels; i++)
1876 for (n = 0; n < 16; n++)
1877 table[i][n] = THP_GET16(gb);
1879 if (!c->has_status) {
1880 /* Initialize the previous sample. */
1881 for (i = 0; i < avctx->channels; i++) {
1882 c->status[i].sample1 = THP_GET16(gb);
1883 c->status[i].sample2 = THP_GET16(gb);
1887 bytestream2_skip(&gb, avctx->channels * 4);
1891 for (ch = 0; ch < avctx->channels; ch++) {
1892 samples = samples_p[ch];
1894 /* Read in every sample for this channel. */
1895 for (i = 0; i < (nb_samples + 13) / 14; i++) {
1896 int byte = bytestream2_get_byteu(&gb);
1897 int index = (byte >> 4) & 7;
1898 unsigned int exp = byte & 0x0F;
1899 int64_t factor1 = table[ch][index * 2];
1900 int64_t factor2 = table[ch][index * 2 + 1];
1902 /* Decode 14 samples. */
1903 for (n = 0; n < 14 && (i * 14 + n < nb_samples); n++) {
1907 sampledat = sign_extend(byte, 4);
1909 byte = bytestream2_get_byteu(&gb);
1910 sampledat = sign_extend(byte >> 4, 4);
1913 sampledat = ((c->status[ch].sample1 * factor1
1914 + c->status[ch].sample2 * factor2) >> 11) + sampledat * (1 << exp);
1915 *samples = av_clip_int16(sampledat);
1916 c->status[ch].sample2 = c->status[ch].sample1;
1917 c->status[ch].sample1 = *samples++;
1923 case AV_CODEC_ID_ADPCM_DTK:
1924 for (channel = 0; channel < avctx->channels; channel++) {
1925 samples = samples_p[channel];
1927 /* Read in every sample for this channel. */
1928 for (i = 0; i < nb_samples / 28; i++) {
1931 bytestream2_skipu(&gb, 1);
1932 header = bytestream2_get_byteu(&gb);
1933 bytestream2_skipu(&gb, 3 - channel);
1935 /* Decode 28 samples. */
1936 for (n = 0; n < 28; n++) {
1937 int32_t sampledat, prev;
1939 switch (header >> 4) {
1941 prev = (c->status[channel].sample1 * 0x3c);
1944 prev = (c->status[channel].sample1 * 0x73) - (c->status[channel].sample2 * 0x34);
1947 prev = (c->status[channel].sample1 * 0x62) - (c->status[channel].sample2 * 0x37);
1953 prev = av_clip_intp2((prev + 0x20) >> 6, 21);
1955 byte = bytestream2_get_byteu(&gb);
1957 sampledat = sign_extend(byte, 4);
1959 sampledat = sign_extend(byte >> 4, 4);
1961 sampledat = ((sampledat * (1 << 12)) >> (header & 0xf)) * (1 << 6) + prev;
1962 *samples++ = av_clip_int16(sampledat >> 6);
1963 c->status[channel].sample2 = c->status[channel].sample1;
1964 c->status[channel].sample1 = sampledat;
1968 bytestream2_seek(&gb, 0, SEEK_SET);
1971 case AV_CODEC_ID_ADPCM_PSX:
1972 for (int block = 0; block < avpkt->size / FFMAX(avctx->block_align, 16 * avctx->channels); block++) {
1973 int nb_samples_per_block = 28 * FFMAX(avctx->block_align, 16 * avctx->channels) / (16 * avctx->channels);
1974 for (channel = 0; channel < avctx->channels; channel++) {
1975 samples = samples_p[channel] + block * nb_samples_per_block;
1976 av_assert0((block + 1) * nb_samples_per_block <= nb_samples);
1978 /* Read in every sample for this channel. */
1979 for (i = 0; i < nb_samples_per_block / 28; i++) {
1980 int filter, shift, flag, byte;
1982 filter = bytestream2_get_byteu(&gb);
1983 shift = filter & 0xf;
1984 filter = filter >> 4;
1985 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table))
1986 return AVERROR_INVALIDDATA;
1987 flag = bytestream2_get_byteu(&gb);
1989 /* Decode 28 samples. */
1990 for (n = 0; n < 28; n++) {
1991 int sample = 0, scale;
1995 scale = sign_extend(byte >> 4, 4);
1997 byte = bytestream2_get_byteu(&gb);
1998 scale = sign_extend(byte, 4);
2001 scale = scale * (1 << 12);
2002 sample = (int)((scale >> shift) + (c->status[channel].sample1 * xa_adpcm_table[filter][0] + c->status[channel].sample2 * xa_adpcm_table[filter][1]) / 64);
2004 *samples++ = av_clip_int16(sample);
2005 c->status[channel].sample2 = c->status[channel].sample1;
2006 c->status[channel].sample1 = sample;
2012 case AV_CODEC_ID_ADPCM_ARGO:
2014 * The format of each block:
2015 * uint8_t left_control;
2016 * uint4_t left_samples[nb_samples];
2017 * ---- and if stereo ----
2018 * uint8_t right_control;
2019 * uint4_t right_samples[nb_samples];
2021 * Format of the control byte:
2022 * MSB [SSSSRDRR] LSB
2023 * S = (Shift Amount - 2)
2027 * Each block relies on the previous two samples of each channel.
2028 * They should be 0 initially.
2030 for (int block = 0; block < avpkt->size / avctx->block_align; block++) {
2031 for (channel = 0; channel < avctx->channels; channel++) {
2034 samples = samples_p[channel] + block * 32;
2035 cs = c->status + channel;
2037 /* Get the control byte and decode the samples, 2 at a time. */
2038 control = bytestream2_get_byteu(&gb);
2039 shift = (control >> 4) + 2;
2041 for (n = 0; n < 16; n++) {
2042 int sample = bytestream2_get_byteu(&gb);
2043 *samples++ = ff_adpcm_argo_expand_nibble(cs, sample >> 4, shift, control & 0x04);
2044 *samples++ = ff_adpcm_argo_expand_nibble(cs, sample >> 0, shift, control & 0x04);
2049 case AV_CODEC_ID_ADPCM_ZORK:
2050 if (!c->has_status) {
2051 for (channel = 0; channel < avctx->channels; channel++) {
2052 c->status[channel].predictor = 0;
2053 c->status[channel].step_index = 0;
2057 for (n = 0; n < nb_samples * avctx->channels; n++) {
2058 int v = bytestream2_get_byteu(&gb);
2059 *samples++ = adpcm_zork_expand_nibble(&c->status[n % avctx->channels], v);
2062 case AV_CODEC_ID_ADPCM_IMA_MTF:
2063 for (n = nb_samples / 2; n > 0; n--) {
2064 for (channel = 0; channel < avctx->channels; channel++) {
2065 int v = bytestream2_get_byteu(&gb);
2066 *samples++ = adpcm_ima_mtf_expand_nibble(&c->status[channel], v >> 4);
2067 samples[st] = adpcm_ima_mtf_expand_nibble(&c->status[channel], v & 0x0F);
2069 samples += avctx->channels;
2073 av_assert0(0); // unsupported codec_id should not happen
2076 if (avpkt->size && bytestream2_tell(&gb) == 0) {
2077 av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n");
2078 return AVERROR_INVALIDDATA;
2083 if (avpkt->size < bytestream2_tell(&gb)) {
2084 av_log(avctx, AV_LOG_ERROR, "Overread of %d < %d\n", avpkt->size, bytestream2_tell(&gb));
2088 return bytestream2_tell(&gb);
2091 static void adpcm_flush(AVCodecContext *avctx)
2093 ADPCMDecodeContext *c = avctx->priv_data;
2098 static const enum AVSampleFormat sample_fmts_s16[] = { AV_SAMPLE_FMT_S16,
2099 AV_SAMPLE_FMT_NONE };
2100 static const enum AVSampleFormat sample_fmts_s16p[] = { AV_SAMPLE_FMT_S16P,
2101 AV_SAMPLE_FMT_NONE };
2102 static const enum AVSampleFormat sample_fmts_both[] = { AV_SAMPLE_FMT_S16,
2104 AV_SAMPLE_FMT_NONE };
2106 #define ADPCM_DECODER(id_, sample_fmts_, name_, long_name_) \
2107 AVCodec ff_ ## name_ ## _decoder = { \
2109 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
2110 .type = AVMEDIA_TYPE_AUDIO, \
2112 .priv_data_size = sizeof(ADPCMDecodeContext), \
2113 .init = adpcm_decode_init, \
2114 .decode = adpcm_decode_frame, \
2115 .flush = adpcm_flush, \
2116 .capabilities = AV_CODEC_CAP_DR1, \
2117 .sample_fmts = sample_fmts_, \
2120 /* Note: Do not forget to add new entries to the Makefile as well. */
2121 ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie");
2122 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC");
2123 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AGM, sample_fmts_s16, adpcm_agm, "ADPCM AmuseGraphics Movie");
2124 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AICA, sample_fmts_s16p, adpcm_aica, "ADPCM Yamaha AICA");
2125 ADPCM_DECODER(AV_CODEC_ID_ADPCM_ARGO, sample_fmts_s16p, adpcm_argo, "ADPCM Argonaut Games");
2126 ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology");
2127 ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK");
2128 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts");
2129 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
2130 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1");
2131 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2");
2132 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3");
2133 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
2134 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV");
2135 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC");
2136 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APM, sample_fmts_s16, adpcm_ima_apm, "ADPCM IMA Ubisoft APM");
2137 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_CUNNING, sample_fmts_s16, adpcm_ima_cunning, "ADPCM IMA Cunning Developments");
2138 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DAT4, sample_fmts_s16, adpcm_ima_dat4, "ADPCM IMA Eurocom DAT4");
2139 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
2140 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
2141 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
2142 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
2143 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
2144 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_MOFLEX, sample_fmts_s16p, adpcm_ima_moflex, "ADPCM IMA MobiClip MOFLEX");
2145 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_MTF, sample_fmts_s16, adpcm_ima_mtf, "ADPCM IMA Capcom's MT Framework");
2146 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI");
2147 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime");
2148 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical");
2149 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SSI, sample_fmts_s16, adpcm_ima_ssi, "ADPCM IMA Simon & Schuster Interactive");
2150 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
2151 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ALP, sample_fmts_s16, adpcm_ima_alp, "ADPCM IMA High Voltage Software ALP");
2152 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV");
2153 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood");
2154 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MS, sample_fmts_both, adpcm_ms, "ADPCM Microsoft");
2155 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MTAF, sample_fmts_s16p, adpcm_mtaf, "ADPCM MTAF");
2156 ADPCM_DECODER(AV_CODEC_ID_ADPCM_PSX, sample_fmts_s16p, adpcm_psx, "ADPCM Playstation");
2157 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
2158 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
2159 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
2160 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash");
2161 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP_LE, sample_fmts_s16p, adpcm_thp_le, "ADPCM Nintendo THP (little-endian)");
2162 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo THP");
2163 ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA");
2164 ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha");
2165 ADPCM_DECODER(AV_CODEC_ID_ADPCM_ZORK, sample_fmts_s16, adpcm_zork, "ADPCM Zork");