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_CUNNING:
116 case AV_CODEC_ID_ADPCM_DTK:
117 case AV_CODEC_ID_ADPCM_EA:
120 case AV_CODEC_ID_ADPCM_AFC:
121 case AV_CODEC_ID_ADPCM_EA_R1:
122 case AV_CODEC_ID_ADPCM_EA_R2:
123 case AV_CODEC_ID_ADPCM_EA_R3:
124 case AV_CODEC_ID_ADPCM_EA_XAS:
125 case AV_CODEC_ID_ADPCM_MS:
128 case AV_CODEC_ID_ADPCM_MTAF:
131 if (avctx->channels & 1) {
132 avpriv_request_sample(avctx, "channel count %d", avctx->channels);
133 return AVERROR_PATCHWELCOME;
136 case AV_CODEC_ID_ADPCM_PSX:
138 if (avctx->channels <= 0 || avctx->block_align % (16 * avctx->channels))
139 return AVERROR_INVALIDDATA;
141 case AV_CODEC_ID_ADPCM_IMA_DAT4:
142 case AV_CODEC_ID_ADPCM_THP:
143 case AV_CODEC_ID_ADPCM_THP_LE:
147 if (avctx->channels < min_channels || avctx->channels > max_channels) {
148 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
149 return AVERROR(EINVAL);
152 switch(avctx->codec->id) {
153 case AV_CODEC_ID_ADPCM_CT:
154 c->status[0].step = c->status[1].step = 511;
156 case AV_CODEC_ID_ADPCM_IMA_WAV:
157 if (avctx->bits_per_coded_sample < 2 || avctx->bits_per_coded_sample > 5)
158 return AVERROR_INVALIDDATA;
160 case AV_CODEC_ID_ADPCM_IMA_APC:
161 if (avctx->extradata && avctx->extradata_size >= 8) {
162 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata ), 18);
163 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 4), 18);
166 case AV_CODEC_ID_ADPCM_IMA_APM:
167 if (avctx->extradata) {
168 if (avctx->extradata_size >= 28) {
169 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 16), 18);
170 c->status[0].step_index = av_clip(AV_RL32(avctx->extradata + 20), 0, 88);
171 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 4), 18);
172 c->status[1].step_index = av_clip(AV_RL32(avctx->extradata + 8), 0, 88);
173 } else if (avctx->extradata_size >= 16) {
174 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 0), 18);
175 c->status[0].step_index = av_clip(AV_RL32(avctx->extradata + 4), 0, 88);
176 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 8), 18);
177 c->status[1].step_index = av_clip(AV_RL32(avctx->extradata + 12), 0, 88);
181 case AV_CODEC_ID_ADPCM_IMA_WS:
182 if (avctx->extradata && avctx->extradata_size >= 2)
183 c->vqa_version = AV_RL16(avctx->extradata);
185 case AV_CODEC_ID_ADPCM_ARGO:
186 if (avctx->bits_per_coded_sample != 4 || avctx->block_align != 17 * avctx->channels)
187 return AVERROR_INVALIDDATA;
189 case AV_CODEC_ID_ADPCM_ZORK:
190 if (avctx->bits_per_coded_sample != 8)
191 return AVERROR_INVALIDDATA;
197 switch (avctx->codec->id) {
198 case AV_CODEC_ID_ADPCM_AICA:
199 case AV_CODEC_ID_ADPCM_IMA_DAT4:
200 case AV_CODEC_ID_ADPCM_IMA_QT:
201 case AV_CODEC_ID_ADPCM_IMA_WAV:
202 case AV_CODEC_ID_ADPCM_4XM:
203 case AV_CODEC_ID_ADPCM_XA:
204 case AV_CODEC_ID_ADPCM_EA_R1:
205 case AV_CODEC_ID_ADPCM_EA_R2:
206 case AV_CODEC_ID_ADPCM_EA_R3:
207 case AV_CODEC_ID_ADPCM_EA_XAS:
208 case AV_CODEC_ID_ADPCM_THP:
209 case AV_CODEC_ID_ADPCM_THP_LE:
210 case AV_CODEC_ID_ADPCM_AFC:
211 case AV_CODEC_ID_ADPCM_DTK:
212 case AV_CODEC_ID_ADPCM_PSX:
213 case AV_CODEC_ID_ADPCM_MTAF:
214 case AV_CODEC_ID_ADPCM_ARGO:
215 case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
216 avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
218 case AV_CODEC_ID_ADPCM_IMA_WS:
219 avctx->sample_fmt = c->vqa_version == 3 ? AV_SAMPLE_FMT_S16P :
222 case AV_CODEC_ID_ADPCM_MS:
223 avctx->sample_fmt = avctx->channels > 2 ? AV_SAMPLE_FMT_S16P :
227 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
233 static inline int16_t adpcm_agm_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
235 int delta, pred, step, add;
240 add = (delta * 2 + 1) * step;
244 if ((nibble & 8) == 0)
245 pred = av_clip(pred + (add >> 3), -32767, 32767);
247 pred = av_clip(pred - (add >> 3), -32767, 32767);
254 c->step = av_clip(c->step * 2, 127, 24576);
272 c->step = av_clip(c->step, 127, 24576);
277 static inline int16_t adpcm_ima_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int shift)
281 int sign, delta, diff, step;
283 step = ff_adpcm_step_table[c->step_index];
284 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
285 step_index = av_clip(step_index, 0, 88);
289 /* perform direct multiplication instead of series of jumps proposed by
290 * the reference ADPCM implementation since modern CPUs can do the mults
292 diff = ((2 * delta + 1) * step) >> shift;
293 predictor = c->predictor;
294 if (sign) predictor -= diff;
295 else predictor += diff;
297 c->predictor = av_clip_int16(predictor);
298 c->step_index = step_index;
300 return (int16_t)c->predictor;
303 static inline int16_t adpcm_ima_alp_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int shift)
307 int sign, delta, diff, step;
309 step = ff_adpcm_step_table[c->step_index];
310 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
311 step_index = av_clip(step_index, 0, 88);
315 diff = (delta * step) >> shift;
316 predictor = c->predictor;
317 if (sign) predictor -= diff;
318 else predictor += diff;
320 c->predictor = av_clip_int16(predictor);
321 c->step_index = step_index;
323 return (int16_t)c->predictor;
326 static inline int16_t adpcm_ima_mtf_expand_nibble(ADPCMChannelStatus *c, int nibble)
328 int step_index, step, delta, predictor;
330 step = ff_adpcm_step_table[c->step_index];
332 delta = step * (2 * nibble - 15);
333 predictor = c->predictor + delta;
335 step_index = c->step_index + mtf_index_table[(unsigned)nibble];
336 c->predictor = av_clip_int16(predictor >> 4);
337 c->step_index = av_clip(step_index, 0, 88);
339 return (int16_t)c->predictor;
342 static inline int16_t adpcm_ima_cunning_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
348 nibble = sign_extend(nibble & 0xF, 4);
350 step = ff_adpcm_ima_cunning_step_table[c->step_index];
351 step_index = c->step_index + ff_adpcm_ima_cunning_index_table[abs(nibble)];
352 step_index = av_clip(step_index, 0, 60);
354 predictor = c->predictor + step * nibble;
356 c->predictor = av_clip_int16(predictor);
357 c->step_index = step_index;
362 static inline int16_t adpcm_ima_wav_expand_nibble(ADPCMChannelStatus *c, GetBitContext *gb, int bps)
364 int nibble, step_index, predictor, sign, delta, diff, step, shift;
367 nibble = get_bits_le(gb, bps),
368 step = ff_adpcm_step_table[c->step_index];
369 step_index = c->step_index + ff_adpcm_index_tables[bps - 2][nibble];
370 step_index = av_clip(step_index, 0, 88);
372 sign = nibble & (1 << shift);
373 delta = av_mod_uintp2(nibble, shift);
374 diff = ((2 * delta + 1) * step) >> shift;
375 predictor = c->predictor;
376 if (sign) predictor -= diff;
377 else predictor += diff;
379 c->predictor = av_clip_int16(predictor);
380 c->step_index = step_index;
382 return (int16_t)c->predictor;
385 static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble)
391 step = ff_adpcm_step_table[c->step_index];
392 step_index = c->step_index + ff_adpcm_index_table[nibble];
393 step_index = av_clip(step_index, 0, 88);
396 if (nibble & 4) diff += step;
397 if (nibble & 2) diff += step >> 1;
398 if (nibble & 1) diff += step >> 2;
401 predictor = c->predictor - diff;
403 predictor = c->predictor + diff;
405 c->predictor = av_clip_int16(predictor);
406 c->step_index = step_index;
411 static inline int16_t adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble)
415 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
416 predictor += ((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
418 c->sample2 = c->sample1;
419 c->sample1 = av_clip_int16(predictor);
420 c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8;
421 if (c->idelta < 16) c->idelta = 16;
422 if (c->idelta > INT_MAX/768) {
423 av_log(NULL, AV_LOG_WARNING, "idelta overflow\n");
424 c->idelta = INT_MAX/768;
430 static inline int16_t adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble)
432 int step_index, predictor, sign, delta, diff, step;
434 step = ff_adpcm_oki_step_table[c->step_index];
435 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
436 step_index = av_clip(step_index, 0, 48);
440 diff = ((2 * delta + 1) * step) >> 3;
441 predictor = c->predictor;
442 if (sign) predictor -= diff;
443 else predictor += diff;
445 c->predictor = av_clip_intp2(predictor, 11);
446 c->step_index = step_index;
448 return c->predictor * 16;
451 static inline int16_t adpcm_ct_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
453 int sign, delta, diff;
458 /* perform direct multiplication instead of series of jumps proposed by
459 * the reference ADPCM implementation since modern CPUs can do the mults
461 diff = ((2 * delta + 1) * c->step) >> 3;
462 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
463 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
464 c->predictor = av_clip_int16(c->predictor);
465 /* calculate new step and clamp it to range 511..32767 */
466 new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
467 c->step = av_clip(new_step, 511, 32767);
469 return (int16_t)c->predictor;
472 static inline int16_t adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int size, int shift)
474 int sign, delta, diff;
476 sign = nibble & (1<<(size-1));
477 delta = nibble & ((1<<(size-1))-1);
478 diff = delta << (7 + c->step + shift);
481 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
483 /* calculate new step */
484 if (delta >= (2*size - 3) && c->step < 3)
486 else if (delta == 0 && c->step > 0)
489 return (int16_t) c->predictor;
492 static inline int16_t adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
499 c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
500 c->predictor = av_clip_int16(c->predictor);
501 c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
502 c->step = av_clip(c->step, 127, 24576);
506 static inline int16_t adpcm_mtaf_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
508 c->predictor += ff_adpcm_mtaf_stepsize[c->step][nibble];
509 c->predictor = av_clip_int16(c->predictor);
510 c->step += ff_adpcm_index_table[nibble];
511 c->step = av_clip_uintp2(c->step, 5);
515 static inline int16_t adpcm_zork_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
517 int16_t index = c->step_index;
518 uint32_t lookup_sample = ff_adpcm_step_table[index];
522 sample += lookup_sample;
524 sample += lookup_sample >> 1;
526 sample += lookup_sample >> 2;
528 sample += lookup_sample >> 3;
530 sample += lookup_sample >> 4;
532 sample += lookup_sample >> 5;
534 sample += lookup_sample >> 6;
538 sample += c->predictor;
539 sample = av_clip_int16(sample);
541 index += zork_index_table[(nibble >> 4) & 7];
542 index = av_clip(index, 0, 88);
544 c->predictor = sample;
545 c->step_index = index;
550 static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1,
551 const uint8_t *in, ADPCMChannelStatus *left,
552 ADPCMChannelStatus *right, int channels, int sample_offset)
555 int shift,filter,f0,f1;
559 out0 += sample_offset;
563 out1 += sample_offset;
566 shift = 12 - (in[4+i*2] & 15);
567 filter = in[4+i*2] >> 4;
568 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
569 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
573 avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift);
576 f0 = xa_adpcm_table[filter][0];
577 f1 = xa_adpcm_table[filter][1];
585 t = sign_extend(d, 4);
586 s = t*(1<<shift) + ((s_1*f0 + s_2*f1+32)>>6);
588 s_1 = av_clip_int16(s);
595 s_1 = right->sample1;
596 s_2 = right->sample2;
599 shift = 12 - (in[5+i*2] & 15);
600 filter = in[5+i*2] >> 4;
601 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table) || shift < 0) {
602 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
606 avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift);
610 f0 = xa_adpcm_table[filter][0];
611 f1 = xa_adpcm_table[filter][1];
616 t = sign_extend(d >> 4, 4);
617 s = t*(1<<shift) + ((s_1*f0 + s_2*f1+32)>>6);
619 s_1 = av_clip_int16(s);
624 right->sample1 = s_1;
625 right->sample2 = s_2;
631 out0 += 28 * (3 - channels);
632 out1 += 28 * (3 - channels);
638 static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples)
640 ADPCMDecodeContext *c = avctx->priv_data;
643 int k0, signmask, nb_bits, count;
644 int size = buf_size*8;
647 init_get_bits(&gb, buf, size);
649 //read bits & initial values
650 nb_bits = get_bits(&gb, 2)+2;
651 table = swf_index_tables[nb_bits-2];
652 k0 = 1 << (nb_bits-2);
653 signmask = 1 << (nb_bits-1);
655 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
656 for (i = 0; i < avctx->channels; i++) {
657 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
658 c->status[i].step_index = get_bits(&gb, 6);
661 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
664 for (i = 0; i < avctx->channels; i++) {
665 // similar to IMA adpcm
666 int delta = get_bits(&gb, nb_bits);
667 int step = ff_adpcm_step_table[c->status[i].step_index];
668 int vpdiff = 0; // vpdiff = (delta+0.5)*step/4
679 if (delta & signmask)
680 c->status[i].predictor -= vpdiff;
682 c->status[i].predictor += vpdiff;
684 c->status[i].step_index += table[delta & (~signmask)];
686 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
687 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
689 *samples++ = c->status[i].predictor;
695 int16_t ff_adpcm_argo_expand_nibble(ADPCMChannelStatus *cs, int nibble, int shift, int flag)
697 int sample = sign_extend(nibble, 4) * (1 << shift);
700 sample += (8 * cs->sample1) - (4 * cs->sample2);
702 sample += 4 * cs->sample1;
704 sample = av_clip_int16(sample >> 2);
706 cs->sample2 = cs->sample1;
707 cs->sample1 = sample;
713 * Get the number of samples (per channel) that will be decoded from the packet.
714 * In one case, this is actually the maximum number of samples possible to
715 * decode with the given buf_size.
717 * @param[out] coded_samples set to the number of samples as coded in the
718 * packet, or 0 if the codec does not encode the
719 * number of samples in each frame.
720 * @param[out] approx_nb_samples set to non-zero if the number of samples
721 * returned is an approximation.
723 static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
724 int buf_size, int *coded_samples, int *approx_nb_samples)
726 ADPCMDecodeContext *s = avctx->priv_data;
728 int ch = avctx->channels;
729 int has_coded_samples = 0;
733 *approx_nb_samples = 0;
738 switch (avctx->codec->id) {
739 /* constant, only check buf_size */
740 case AV_CODEC_ID_ADPCM_EA_XAS:
741 if (buf_size < 76 * ch)
745 case AV_CODEC_ID_ADPCM_IMA_QT:
746 if (buf_size < 34 * ch)
750 /* simple 4-bit adpcm */
751 case AV_CODEC_ID_ADPCM_CT:
752 case AV_CODEC_ID_ADPCM_IMA_APC:
753 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
754 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
755 case AV_CODEC_ID_ADPCM_IMA_OKI:
756 case AV_CODEC_ID_ADPCM_IMA_WS:
757 case AV_CODEC_ID_ADPCM_YAMAHA:
758 case AV_CODEC_ID_ADPCM_AICA:
759 case AV_CODEC_ID_ADPCM_IMA_SSI:
760 case AV_CODEC_ID_ADPCM_IMA_APM:
761 case AV_CODEC_ID_ADPCM_IMA_ALP:
762 case AV_CODEC_ID_ADPCM_IMA_MTF:
763 nb_samples = buf_size * 2 / ch;
769 /* simple 4-bit adpcm, with header */
771 switch (avctx->codec->id) {
772 case AV_CODEC_ID_ADPCM_4XM:
773 case AV_CODEC_ID_ADPCM_AGM:
774 case AV_CODEC_ID_ADPCM_IMA_DAT4:
775 case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
776 case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
777 case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break;
778 case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break;
781 return (buf_size - header_size) * 2 / ch;
783 /* more complex formats */
784 switch (avctx->codec->id) {
785 case AV_CODEC_ID_ADPCM_EA:
786 has_coded_samples = 1;
787 *coded_samples = bytestream2_get_le32(gb);
788 *coded_samples -= *coded_samples % 28;
789 nb_samples = (buf_size - 12) / 30 * 28;
791 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
792 has_coded_samples = 1;
793 *coded_samples = bytestream2_get_le32(gb);
794 nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch;
796 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
797 nb_samples = (buf_size - ch) / ch * 2;
799 case AV_CODEC_ID_ADPCM_EA_R1:
800 case AV_CODEC_ID_ADPCM_EA_R2:
801 case AV_CODEC_ID_ADPCM_EA_R3:
802 /* maximum number of samples */
803 /* has internal offsets and a per-frame switch to signal raw 16-bit */
804 has_coded_samples = 1;
805 switch (avctx->codec->id) {
806 case AV_CODEC_ID_ADPCM_EA_R1:
807 header_size = 4 + 9 * ch;
808 *coded_samples = bytestream2_get_le32(gb);
810 case AV_CODEC_ID_ADPCM_EA_R2:
811 header_size = 4 + 5 * ch;
812 *coded_samples = bytestream2_get_le32(gb);
814 case AV_CODEC_ID_ADPCM_EA_R3:
815 header_size = 4 + 5 * ch;
816 *coded_samples = bytestream2_get_be32(gb);
819 *coded_samples -= *coded_samples % 28;
820 nb_samples = (buf_size - header_size) * 2 / ch;
821 nb_samples -= nb_samples % 28;
822 *approx_nb_samples = 1;
824 case AV_CODEC_ID_ADPCM_IMA_DK3:
825 if (avctx->block_align > 0)
826 buf_size = FFMIN(buf_size, avctx->block_align);
827 nb_samples = ((buf_size - 16) * 2 / 3 * 4) / ch;
829 case AV_CODEC_ID_ADPCM_IMA_DK4:
830 if (avctx->block_align > 0)
831 buf_size = FFMIN(buf_size, avctx->block_align);
832 if (buf_size < 4 * ch)
833 return AVERROR_INVALIDDATA;
834 nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch;
836 case AV_CODEC_ID_ADPCM_IMA_RAD:
837 if (avctx->block_align > 0)
838 buf_size = FFMIN(buf_size, avctx->block_align);
839 nb_samples = (buf_size - 4 * ch) * 2 / ch;
841 case AV_CODEC_ID_ADPCM_IMA_WAV:
843 int bsize = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
844 int bsamples = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
845 if (avctx->block_align > 0)
846 buf_size = FFMIN(buf_size, avctx->block_align);
847 if (buf_size < 4 * ch)
848 return AVERROR_INVALIDDATA;
849 nb_samples = 1 + (buf_size - 4 * ch) / (bsize * ch) * bsamples;
852 case AV_CODEC_ID_ADPCM_MS:
853 if (avctx->block_align > 0)
854 buf_size = FFMIN(buf_size, avctx->block_align);
855 nb_samples = (buf_size - 6 * ch) * 2 / ch;
857 case AV_CODEC_ID_ADPCM_MTAF:
858 if (avctx->block_align > 0)
859 buf_size = FFMIN(buf_size, avctx->block_align);
860 nb_samples = (buf_size - 16 * (ch / 2)) * 2 / ch;
862 case AV_CODEC_ID_ADPCM_SBPRO_2:
863 case AV_CODEC_ID_ADPCM_SBPRO_3:
864 case AV_CODEC_ID_ADPCM_SBPRO_4:
866 int samples_per_byte;
867 switch (avctx->codec->id) {
868 case AV_CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break;
869 case AV_CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break;
870 case AV_CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break;
872 if (!s->status[0].step_index) {
874 return AVERROR_INVALIDDATA;
878 nb_samples += buf_size * samples_per_byte / ch;
881 case AV_CODEC_ID_ADPCM_SWF:
883 int buf_bits = buf_size * 8 - 2;
884 int nbits = (bytestream2_get_byte(gb) >> 6) + 2;
885 int block_hdr_size = 22 * ch;
886 int block_size = block_hdr_size + nbits * ch * 4095;
887 int nblocks = buf_bits / block_size;
888 int bits_left = buf_bits - nblocks * block_size;
889 nb_samples = nblocks * 4096;
890 if (bits_left >= block_hdr_size)
891 nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch);
894 case AV_CODEC_ID_ADPCM_THP:
895 case AV_CODEC_ID_ADPCM_THP_LE:
896 if (avctx->extradata) {
897 nb_samples = buf_size * 14 / (8 * ch);
900 has_coded_samples = 1;
901 bytestream2_skip(gb, 4); // channel size
902 *coded_samples = (avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE) ?
903 bytestream2_get_le32(gb) :
904 bytestream2_get_be32(gb);
905 buf_size -= 8 + 36 * ch;
907 nb_samples = buf_size / 8 * 14;
908 if (buf_size % 8 > 1)
909 nb_samples += (buf_size % 8 - 1) * 2;
910 *approx_nb_samples = 1;
912 case AV_CODEC_ID_ADPCM_AFC:
913 nb_samples = buf_size / (9 * ch) * 16;
915 case AV_CODEC_ID_ADPCM_XA:
916 nb_samples = (buf_size / 128) * 224 / ch;
918 case AV_CODEC_ID_ADPCM_DTK:
919 case AV_CODEC_ID_ADPCM_PSX:
920 nb_samples = buf_size / (16 * ch) * 28;
922 case AV_CODEC_ID_ADPCM_ARGO:
923 nb_samples = buf_size / avctx->block_align * 32;
925 case AV_CODEC_ID_ADPCM_ZORK:
926 nb_samples = buf_size / ch;
930 /* validate coded sample count */
931 if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
932 return AVERROR_INVALIDDATA;
937 static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
938 int *got_frame_ptr, AVPacket *avpkt)
940 AVFrame *frame = data;
941 const uint8_t *buf = avpkt->data;
942 int buf_size = avpkt->size;
943 ADPCMDecodeContext *c = avctx->priv_data;
944 ADPCMChannelStatus *cs;
945 int n, m, channel, i;
950 int nb_samples, coded_samples, approx_nb_samples, ret;
953 bytestream2_init(&gb, buf, buf_size);
954 nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples, &approx_nb_samples);
955 if (nb_samples <= 0) {
956 av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
957 return AVERROR_INVALIDDATA;
960 /* get output buffer */
961 frame->nb_samples = nb_samples;
962 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
964 samples = (int16_t *)frame->data[0];
965 samples_p = (int16_t **)frame->extended_data;
967 /* use coded_samples when applicable */
968 /* it is always <= nb_samples, so the output buffer will be large enough */
970 if (!approx_nb_samples && coded_samples != nb_samples)
971 av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
972 frame->nb_samples = nb_samples = coded_samples;
975 st = avctx->channels == 2 ? 1 : 0;
977 switch(avctx->codec->id) {
978 case AV_CODEC_ID_ADPCM_IMA_QT:
979 /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
980 Channel data is interleaved per-chunk. */
981 for (channel = 0; channel < avctx->channels; channel++) {
984 cs = &(c->status[channel]);
985 /* (pppppp) (piiiiiii) */
987 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
988 predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
989 step_index = predictor & 0x7F;
992 if (cs->step_index == step_index) {
993 int diff = predictor - cs->predictor;
1000 cs->step_index = step_index;
1001 cs->predictor = predictor;
1004 if (cs->step_index > 88u){
1005 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1006 channel, cs->step_index);
1007 return AVERROR_INVALIDDATA;
1010 samples = samples_p[channel];
1012 for (m = 0; m < 64; m += 2) {
1013 int byte = bytestream2_get_byteu(&gb);
1014 samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F);
1015 samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 );
1019 case AV_CODEC_ID_ADPCM_IMA_WAV:
1020 for(i=0; i<avctx->channels; i++){
1021 cs = &(c->status[i]);
1022 cs->predictor = samples_p[i][0] = sign_extend(bytestream2_get_le16u(&gb), 16);
1024 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1025 if (cs->step_index > 88u){
1026 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1028 return AVERROR_INVALIDDATA;
1032 if (avctx->bits_per_coded_sample != 4) {
1033 int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
1034 int block_size = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
1035 uint8_t temp[20 + AV_INPUT_BUFFER_PADDING_SIZE] = { 0 };
1038 for (n = 0; n < (nb_samples - 1) / samples_per_block; n++) {
1039 for (i = 0; i < avctx->channels; i++) {
1043 samples = &samples_p[i][1 + n * samples_per_block];
1044 for (j = 0; j < block_size; j++) {
1045 temp[j] = buf[4 * avctx->channels + block_size * n * avctx->channels +
1046 (j % 4) + (j / 4) * (avctx->channels * 4) + i * 4];
1048 ret = init_get_bits8(&g, (const uint8_t *)&temp, block_size);
1051 for (m = 0; m < samples_per_block; m++) {
1052 samples[m] = adpcm_ima_wav_expand_nibble(cs, &g,
1053 avctx->bits_per_coded_sample);
1057 bytestream2_skip(&gb, avctx->block_align - avctx->channels * 4);
1059 for (n = 0; n < (nb_samples - 1) / 8; n++) {
1060 for (i = 0; i < avctx->channels; i++) {
1062 samples = &samples_p[i][1 + n * 8];
1063 for (m = 0; m < 8; m += 2) {
1064 int v = bytestream2_get_byteu(&gb);
1065 samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
1066 samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
1072 case AV_CODEC_ID_ADPCM_4XM:
1073 for (i = 0; i < avctx->channels; i++)
1074 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1076 for (i = 0; i < avctx->channels; i++) {
1077 c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1078 if (c->status[i].step_index > 88u) {
1079 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1080 i, c->status[i].step_index);
1081 return AVERROR_INVALIDDATA;
1085 for (i = 0; i < avctx->channels; i++) {
1086 samples = (int16_t *)frame->data[i];
1088 for (n = nb_samples >> 1; n > 0; n--) {
1089 int v = bytestream2_get_byteu(&gb);
1090 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
1091 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
1095 case AV_CODEC_ID_ADPCM_AGM:
1096 for (i = 0; i < avctx->channels; i++)
1097 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1098 for (i = 0; i < avctx->channels; i++)
1099 c->status[i].step = sign_extend(bytestream2_get_le16u(&gb), 16);
1101 for (n = 0; n < nb_samples >> (1 - st); n++) {
1102 int v = bytestream2_get_byteu(&gb);
1103 *samples++ = adpcm_agm_expand_nibble(&c->status[0], v & 0xF);
1104 *samples++ = adpcm_agm_expand_nibble(&c->status[st], v >> 4 );
1107 case AV_CODEC_ID_ADPCM_MS:
1109 int block_predictor;
1111 if (avctx->channels > 2) {
1112 for (channel = 0; channel < avctx->channels; channel++) {
1113 samples = samples_p[channel];
1114 block_predictor = bytestream2_get_byteu(&gb);
1115 if (block_predictor > 6) {
1116 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[%d] = %d\n",
1117 channel, block_predictor);
1118 return AVERROR_INVALIDDATA;
1120 c->status[channel].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1121 c->status[channel].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1122 c->status[channel].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1123 c->status[channel].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1124 c->status[channel].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1125 *samples++ = c->status[channel].sample2;
1126 *samples++ = c->status[channel].sample1;
1127 for(n = (nb_samples - 2) >> 1; n > 0; n--) {
1128 int byte = bytestream2_get_byteu(&gb);
1129 *samples++ = adpcm_ms_expand_nibble(&c->status[channel], byte >> 4 );
1130 *samples++ = adpcm_ms_expand_nibble(&c->status[channel], byte & 0x0F);
1134 block_predictor = bytestream2_get_byteu(&gb);
1135 if (block_predictor > 6) {
1136 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n",
1138 return AVERROR_INVALIDDATA;
1140 c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1141 c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1143 block_predictor = bytestream2_get_byteu(&gb);
1144 if (block_predictor > 6) {
1145 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n",
1147 return AVERROR_INVALIDDATA;
1149 c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1150 c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1152 c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1154 c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1157 c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1158 if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1159 c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1160 if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1162 *samples++ = c->status[0].sample2;
1163 if (st) *samples++ = c->status[1].sample2;
1164 *samples++ = c->status[0].sample1;
1165 if (st) *samples++ = c->status[1].sample1;
1166 for(n = (nb_samples - 2) >> (1 - st); n > 0; n--) {
1167 int byte = bytestream2_get_byteu(&gb);
1168 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 );
1169 *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F);
1174 case AV_CODEC_ID_ADPCM_MTAF:
1175 for (channel = 0; channel < avctx->channels; channel+=2) {
1176 bytestream2_skipu(&gb, 4);
1177 c->status[channel ].step = bytestream2_get_le16u(&gb) & 0x1f;
1178 c->status[channel + 1].step = bytestream2_get_le16u(&gb) & 0x1f;
1179 c->status[channel ].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1180 bytestream2_skipu(&gb, 2);
1181 c->status[channel + 1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1182 bytestream2_skipu(&gb, 2);
1183 for (n = 0; n < nb_samples; n+=2) {
1184 int v = bytestream2_get_byteu(&gb);
1185 samples_p[channel][n ] = adpcm_mtaf_expand_nibble(&c->status[channel], v & 0x0F);
1186 samples_p[channel][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel], v >> 4 );
1188 for (n = 0; n < nb_samples; n+=2) {
1189 int v = bytestream2_get_byteu(&gb);
1190 samples_p[channel + 1][n ] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v & 0x0F);
1191 samples_p[channel + 1][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v >> 4 );
1195 case AV_CODEC_ID_ADPCM_IMA_DK4:
1196 for (channel = 0; channel < avctx->channels; channel++) {
1197 cs = &c->status[channel];
1198 cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16);
1199 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1200 if (cs->step_index > 88u){
1201 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1202 channel, cs->step_index);
1203 return AVERROR_INVALIDDATA;
1206 for (n = (nb_samples - 1) >> (1 - st); n > 0; n--) {
1207 int v = bytestream2_get_byteu(&gb);
1208 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
1209 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
1212 case AV_CODEC_ID_ADPCM_IMA_DK3:
1216 int decode_top_nibble_next = 0;
1218 const int16_t *samples_end = samples + avctx->channels * nb_samples;
1220 bytestream2_skipu(&gb, 10);
1221 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1222 c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1223 c->status[0].step_index = bytestream2_get_byteu(&gb);
1224 c->status[1].step_index = bytestream2_get_byteu(&gb);
1225 if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){
1226 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n",
1227 c->status[0].step_index, c->status[1].step_index);
1228 return AVERROR_INVALIDDATA;
1230 /* sign extend the predictors */
1231 diff_channel = c->status[1].predictor;
1233 /* DK3 ADPCM support macro */
1234 #define DK3_GET_NEXT_NIBBLE() \
1235 if (decode_top_nibble_next) { \
1236 nibble = last_byte >> 4; \
1237 decode_top_nibble_next = 0; \
1239 last_byte = bytestream2_get_byteu(&gb); \
1240 nibble = last_byte & 0x0F; \
1241 decode_top_nibble_next = 1; \
1244 while (samples < samples_end) {
1246 /* for this algorithm, c->status[0] is the sum channel and
1247 * c->status[1] is the diff channel */
1249 /* process the first predictor of the sum channel */
1250 DK3_GET_NEXT_NIBBLE();
1251 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1253 /* process the diff channel predictor */
1254 DK3_GET_NEXT_NIBBLE();
1255 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
1257 /* process the first pair of stereo PCM samples */
1258 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1259 *samples++ = c->status[0].predictor + c->status[1].predictor;
1260 *samples++ = c->status[0].predictor - c->status[1].predictor;
1262 /* process the second predictor of the sum channel */
1263 DK3_GET_NEXT_NIBBLE();
1264 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1266 /* process the second pair of stereo PCM samples */
1267 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1268 *samples++ = c->status[0].predictor + c->status[1].predictor;
1269 *samples++ = c->status[0].predictor - c->status[1].predictor;
1272 if ((bytestream2_tell(&gb) & 1))
1273 bytestream2_skip(&gb, 1);
1276 case AV_CODEC_ID_ADPCM_IMA_ISS:
1277 for (channel = 0; channel < avctx->channels; channel++) {
1278 cs = &c->status[channel];
1279 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1280 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1281 if (cs->step_index > 88u){
1282 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1283 channel, cs->step_index);
1284 return AVERROR_INVALIDDATA;
1288 for (n = nb_samples >> (1 - st); n > 0; n--) {
1290 int v = bytestream2_get_byteu(&gb);
1291 /* nibbles are swapped for mono */
1299 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
1300 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
1303 case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
1304 for (channel = 0; channel < avctx->channels; channel++) {
1305 cs = &c->status[channel];
1306 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1307 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1308 if (cs->step_index > 88u){
1309 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1310 channel, cs->step_index);
1311 return AVERROR_INVALIDDATA;
1315 for (int subframe = 0; subframe < nb_samples / 256; subframe++) {
1316 for (channel = 0; channel < avctx->channels; channel++) {
1317 samples = samples_p[channel] + 256 * subframe;
1318 for (n = 0; n < 256; n += 2) {
1319 int v = bytestream2_get_byteu(&gb);
1320 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1321 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1326 case AV_CODEC_ID_ADPCM_IMA_DAT4:
1327 for (channel = 0; channel < avctx->channels; channel++) {
1328 cs = &c->status[channel];
1329 samples = samples_p[channel];
1330 bytestream2_skip(&gb, 4);
1331 for (n = 0; n < nb_samples; n += 2) {
1332 int v = bytestream2_get_byteu(&gb);
1333 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
1334 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
1338 case AV_CODEC_ID_ADPCM_IMA_APC:
1339 for (n = nb_samples >> (1 - st); n > 0; n--) {
1340 int v = bytestream2_get_byteu(&gb);
1341 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
1342 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
1345 case AV_CODEC_ID_ADPCM_IMA_SSI:
1346 for (n = nb_samples >> (1 - st); n > 0; n--) {
1347 int v = bytestream2_get_byteu(&gb);
1348 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0], v >> 4 );
1349 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0x0F);
1352 case AV_CODEC_ID_ADPCM_IMA_APM:
1353 for (n = nb_samples / 2; n > 0; n--) {
1354 for (channel = 0; channel < avctx->channels; channel++) {
1355 int v = bytestream2_get_byteu(&gb);
1356 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[channel], v >> 4 );
1357 samples[st] = adpcm_ima_qt_expand_nibble(&c->status[channel], v & 0x0F);
1359 samples += avctx->channels;
1362 case AV_CODEC_ID_ADPCM_IMA_ALP:
1363 for (n = nb_samples / 2; n > 0; n--) {
1364 for (channel = 0; channel < avctx->channels; channel++) {
1365 int v = bytestream2_get_byteu(&gb);
1366 *samples++ = adpcm_ima_alp_expand_nibble(&c->status[channel], v >> 4 , 2);
1367 samples[st] = adpcm_ima_alp_expand_nibble(&c->status[channel], v & 0x0F, 2);
1369 samples += avctx->channels;
1372 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
1373 for (n = 0; n < nb_samples / 2; n++) {
1374 int v = bytestream2_get_byteu(&gb);
1375 *samples++ = adpcm_ima_cunning_expand_nibble(&c->status[0], v & 0x0F);
1376 *samples++ = adpcm_ima_cunning_expand_nibble(&c->status[0], v >> 4);
1379 case AV_CODEC_ID_ADPCM_IMA_OKI:
1380 for (n = nb_samples >> (1 - st); n > 0; n--) {
1381 int v = bytestream2_get_byteu(&gb);
1382 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 );
1383 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F);
1386 case AV_CODEC_ID_ADPCM_IMA_RAD:
1387 for (channel = 0; channel < avctx->channels; channel++) {
1388 cs = &c->status[channel];
1389 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1390 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1391 if (cs->step_index > 88u){
1392 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1393 channel, cs->step_index);
1394 return AVERROR_INVALIDDATA;
1397 for (n = 0; n < nb_samples / 2; n++) {
1400 byte[0] = bytestream2_get_byteu(&gb);
1402 byte[1] = bytestream2_get_byteu(&gb);
1403 for(channel = 0; channel < avctx->channels; channel++) {
1404 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] & 0x0F, 3);
1406 for(channel = 0; channel < avctx->channels; channel++) {
1407 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] >> 4 , 3);
1411 case AV_CODEC_ID_ADPCM_IMA_WS:
1412 if (c->vqa_version == 3) {
1413 for (channel = 0; channel < avctx->channels; channel++) {
1414 int16_t *smp = samples_p[channel];
1416 for (n = nb_samples / 2; n > 0; n--) {
1417 int v = bytestream2_get_byteu(&gb);
1418 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1419 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1423 for (n = nb_samples / 2; n > 0; n--) {
1424 for (channel = 0; channel < avctx->channels; channel++) {
1425 int v = bytestream2_get_byteu(&gb);
1426 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1427 samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1429 samples += avctx->channels;
1432 bytestream2_seek(&gb, 0, SEEK_END);
1434 case AV_CODEC_ID_ADPCM_XA:
1436 int16_t *out0 = samples_p[0];
1437 int16_t *out1 = samples_p[1];
1438 int samples_per_block = 28 * (3 - avctx->channels) * 4;
1439 int sample_offset = 0;
1440 int bytes_remaining;
1441 while (bytestream2_get_bytes_left(&gb) >= 128) {
1442 if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb),
1443 &c->status[0], &c->status[1],
1444 avctx->channels, sample_offset)) < 0)
1446 bytestream2_skipu(&gb, 128);
1447 sample_offset += samples_per_block;
1449 /* Less than a full block of data left, e.g. when reading from
1450 * 2324 byte per sector XA; the remainder is padding */
1451 bytes_remaining = bytestream2_get_bytes_left(&gb);
1452 if (bytes_remaining > 0) {
1453 bytestream2_skip(&gb, bytes_remaining);
1457 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
1458 for (i=0; i<=st; i++) {
1459 c->status[i].step_index = bytestream2_get_le32u(&gb);
1460 if (c->status[i].step_index > 88u) {
1461 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1462 i, c->status[i].step_index);
1463 return AVERROR_INVALIDDATA;
1466 for (i=0; i<=st; i++) {
1467 c->status[i].predictor = bytestream2_get_le32u(&gb);
1468 if (FFABS((int64_t)c->status[i].predictor) > (1<<16))
1469 return AVERROR_INVALIDDATA;
1472 for (n = nb_samples >> (1 - st); n > 0; n--) {
1473 int byte = bytestream2_get_byteu(&gb);
1474 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3);
1475 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3);
1478 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1479 for (n = nb_samples >> (1 - st); n > 0; n--) {
1480 int byte = bytestream2_get_byteu(&gb);
1481 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6);
1482 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6);
1485 case AV_CODEC_ID_ADPCM_EA:
1487 int previous_left_sample, previous_right_sample;
1488 int current_left_sample, current_right_sample;
1489 int next_left_sample, next_right_sample;
1490 int coeff1l, coeff2l, coeff1r, coeff2r;
1491 int shift_left, shift_right;
1493 /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
1494 each coding 28 stereo samples. */
1496 if(avctx->channels != 2)
1497 return AVERROR_INVALIDDATA;
1499 current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1500 previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1501 current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1502 previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1504 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1505 int byte = bytestream2_get_byteu(&gb);
1506 coeff1l = ea_adpcm_table[ byte >> 4 ];
1507 coeff2l = ea_adpcm_table[(byte >> 4 ) + 4];
1508 coeff1r = ea_adpcm_table[ byte & 0x0F];
1509 coeff2r = ea_adpcm_table[(byte & 0x0F) + 4];
1511 byte = bytestream2_get_byteu(&gb);
1512 shift_left = 20 - (byte >> 4);
1513 shift_right = 20 - (byte & 0x0F);
1515 for (count2 = 0; count2 < 28; count2++) {
1516 byte = bytestream2_get_byteu(&gb);
1517 next_left_sample = sign_extend(byte >> 4, 4) * (1 << shift_left);
1518 next_right_sample = sign_extend(byte, 4) * (1 << shift_right);
1520 next_left_sample = (next_left_sample +
1521 (current_left_sample * coeff1l) +
1522 (previous_left_sample * coeff2l) + 0x80) >> 8;
1523 next_right_sample = (next_right_sample +
1524 (current_right_sample * coeff1r) +
1525 (previous_right_sample * coeff2r) + 0x80) >> 8;
1527 previous_left_sample = current_left_sample;
1528 current_left_sample = av_clip_int16(next_left_sample);
1529 previous_right_sample = current_right_sample;
1530 current_right_sample = av_clip_int16(next_right_sample);
1531 *samples++ = current_left_sample;
1532 *samples++ = current_right_sample;
1536 bytestream2_skip(&gb, 2); // Skip terminating 0x0000
1540 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
1542 int coeff[2][2], shift[2];
1544 for(channel = 0; channel < avctx->channels; channel++) {
1545 int byte = bytestream2_get_byteu(&gb);
1547 coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i];
1548 shift[channel] = 20 - (byte & 0x0F);
1550 for (count1 = 0; count1 < nb_samples / 2; count1++) {
1553 byte[0] = bytestream2_get_byteu(&gb);
1554 if (st) byte[1] = bytestream2_get_byteu(&gb);
1555 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1556 for(channel = 0; channel < avctx->channels; channel++) {
1557 int sample = sign_extend(byte[channel] >> i, 4) * (1 << shift[channel]);
1559 c->status[channel].sample1 * coeff[channel][0] +
1560 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1561 c->status[channel].sample2 = c->status[channel].sample1;
1562 c->status[channel].sample1 = av_clip_int16(sample);
1563 *samples++ = c->status[channel].sample1;
1567 bytestream2_seek(&gb, 0, SEEK_END);
1570 case AV_CODEC_ID_ADPCM_EA_R1:
1571 case AV_CODEC_ID_ADPCM_EA_R2:
1572 case AV_CODEC_ID_ADPCM_EA_R3: {
1573 /* channel numbering
1575 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1576 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1577 const int big_endian = avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R3;
1578 int previous_sample, current_sample, next_sample;
1581 unsigned int channel;
1586 for (channel=0; channel<avctx->channels; channel++)
1587 offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) :
1588 bytestream2_get_le32(&gb)) +
1589 (avctx->channels + 1) * 4;
1591 for (channel=0; channel<avctx->channels; channel++) {
1592 bytestream2_seek(&gb, offsets[channel], SEEK_SET);
1593 samplesC = samples_p[channel];
1595 if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) {
1596 current_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1597 previous_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1599 current_sample = c->status[channel].predictor;
1600 previous_sample = c->status[channel].prev_sample;
1603 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1604 int byte = bytestream2_get_byte(&gb);
1605 if (byte == 0xEE) { /* only seen in R2 and R3 */
1606 current_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1607 previous_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1609 for (count2=0; count2<28; count2++)
1610 *samplesC++ = sign_extend(bytestream2_get_be16(&gb), 16);
1612 coeff1 = ea_adpcm_table[ byte >> 4 ];
1613 coeff2 = ea_adpcm_table[(byte >> 4) + 4];
1614 shift = 20 - (byte & 0x0F);
1616 for (count2=0; count2<28; count2++) {
1618 next_sample = (unsigned)sign_extend(byte, 4) << shift;
1620 byte = bytestream2_get_byte(&gb);
1621 next_sample = (unsigned)sign_extend(byte >> 4, 4) << shift;
1624 next_sample += (current_sample * coeff1) +
1625 (previous_sample * coeff2);
1626 next_sample = av_clip_int16(next_sample >> 8);
1628 previous_sample = current_sample;
1629 current_sample = next_sample;
1630 *samplesC++ = current_sample;
1636 } else if (count != count1) {
1637 av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
1638 count = FFMAX(count, count1);
1641 if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) {
1642 c->status[channel].predictor = current_sample;
1643 c->status[channel].prev_sample = previous_sample;
1647 frame->nb_samples = count * 28;
1648 bytestream2_seek(&gb, 0, SEEK_END);
1651 case AV_CODEC_ID_ADPCM_EA_XAS:
1652 for (channel=0; channel<avctx->channels; channel++) {
1653 int coeff[2][4], shift[4];
1654 int16_t *s = samples_p[channel];
1655 for (n = 0; n < 4; n++, s += 32) {
1656 int val = sign_extend(bytestream2_get_le16u(&gb), 16);
1658 coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i];
1661 val = sign_extend(bytestream2_get_le16u(&gb), 16);
1662 shift[n] = 20 - (val & 0x0F);
1666 for (m=2; m<32; m+=2) {
1667 s = &samples_p[channel][m];
1668 for (n = 0; n < 4; n++, s += 32) {
1670 int byte = bytestream2_get_byteu(&gb);
1672 level = sign_extend(byte >> 4, 4) * (1 << shift[n]);
1673 pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n];
1674 s[0] = av_clip_int16((level + pred + 0x80) >> 8);
1676 level = sign_extend(byte, 4) * (1 << shift[n]);
1677 pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n];
1678 s[1] = av_clip_int16((level + pred + 0x80) >> 8);
1683 case AV_CODEC_ID_ADPCM_IMA_AMV:
1684 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1685 c->status[0].step_index = bytestream2_get_byteu(&gb);
1686 bytestream2_skipu(&gb, 5);
1687 if (c->status[0].step_index > 88u) {
1688 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1689 c->status[0].step_index);
1690 return AVERROR_INVALIDDATA;
1693 for (n = nb_samples >> (1 - st); n > 0; n--) {
1694 int v = bytestream2_get_byteu(&gb);
1696 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3);
1697 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3);
1700 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1701 for (i = 0; i < avctx->channels; i++) {
1702 c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
1703 c->status[i].step_index = bytestream2_get_byteu(&gb);
1704 bytestream2_skipu(&gb, 1);
1705 if (c->status[i].step_index > 88u) {
1706 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1707 c->status[i].step_index);
1708 return AVERROR_INVALIDDATA;
1712 for (n = nb_samples >> (1 - st); n > 0; n--) {
1713 int v = bytestream2_get_byteu(&gb);
1715 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4 );
1716 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf);
1719 case AV_CODEC_ID_ADPCM_CT:
1720 for (n = nb_samples >> (1 - st); n > 0; n--) {
1721 int v = bytestream2_get_byteu(&gb);
1722 *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
1723 *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
1726 case AV_CODEC_ID_ADPCM_SBPRO_4:
1727 case AV_CODEC_ID_ADPCM_SBPRO_3:
1728 case AV_CODEC_ID_ADPCM_SBPRO_2:
1729 if (!c->status[0].step_index) {
1730 /* the first byte is a raw sample */
1731 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1733 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1734 c->status[0].step_index = 1;
1737 if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) {
1738 for (n = nb_samples >> (1 - st); n > 0; n--) {
1739 int byte = bytestream2_get_byteu(&gb);
1740 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1742 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1745 } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) {
1746 for (n = (nb_samples<<st) / 3; n > 0; n--) {
1747 int byte = bytestream2_get_byteu(&gb);
1748 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1750 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1751 (byte >> 2) & 0x07, 3, 0);
1752 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1756 for (n = nb_samples >> (2 - st); n > 0; n--) {
1757 int byte = bytestream2_get_byteu(&gb);
1758 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1760 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1761 (byte >> 4) & 0x03, 2, 2);
1762 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1763 (byte >> 2) & 0x03, 2, 2);
1764 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1769 case AV_CODEC_ID_ADPCM_SWF:
1770 adpcm_swf_decode(avctx, buf, buf_size, samples);
1771 bytestream2_seek(&gb, 0, SEEK_END);
1773 case AV_CODEC_ID_ADPCM_YAMAHA:
1774 for (n = nb_samples >> (1 - st); n > 0; n--) {
1775 int v = bytestream2_get_byteu(&gb);
1776 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
1777 *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
1780 case AV_CODEC_ID_ADPCM_AICA:
1781 if (!c->has_status) {
1782 for (channel = 0; channel < avctx->channels; channel++)
1783 c->status[channel].step = 0;
1786 for (channel = 0; channel < avctx->channels; channel++) {
1787 samples = samples_p[channel];
1788 for (n = nb_samples >> 1; n > 0; n--) {
1789 int v = bytestream2_get_byteu(&gb);
1790 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v & 0x0F);
1791 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v >> 4 );
1795 case AV_CODEC_ID_ADPCM_AFC:
1797 int samples_per_block;
1800 if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) {
1801 samples_per_block = avctx->extradata[0] / 16;
1802 blocks = nb_samples / avctx->extradata[0];
1804 samples_per_block = nb_samples / 16;
1808 for (m = 0; m < blocks; m++) {
1809 for (channel = 0; channel < avctx->channels; channel++) {
1810 int prev1 = c->status[channel].sample1;
1811 int prev2 = c->status[channel].sample2;
1813 samples = samples_p[channel] + m * 16;
1814 /* Read in every sample for this channel. */
1815 for (i = 0; i < samples_per_block; i++) {
1816 int byte = bytestream2_get_byteu(&gb);
1817 int scale = 1 << (byte >> 4);
1818 int index = byte & 0xf;
1819 int factor1 = ff_adpcm_afc_coeffs[0][index];
1820 int factor2 = ff_adpcm_afc_coeffs[1][index];
1822 /* Decode 16 samples. */
1823 for (n = 0; n < 16; n++) {
1827 sampledat = sign_extend(byte, 4);
1829 byte = bytestream2_get_byteu(&gb);
1830 sampledat = sign_extend(byte >> 4, 4);
1833 sampledat = ((prev1 * factor1 + prev2 * factor2) >> 11) +
1835 *samples = av_clip_int16(sampledat);
1841 c->status[channel].sample1 = prev1;
1842 c->status[channel].sample2 = prev2;
1845 bytestream2_seek(&gb, 0, SEEK_END);
1848 case AV_CODEC_ID_ADPCM_THP:
1849 case AV_CODEC_ID_ADPCM_THP_LE:
1854 #define THP_GET16(g) \
1856 avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE ? \
1857 bytestream2_get_le16u(&(g)) : \
1858 bytestream2_get_be16u(&(g)), 16)
1860 if (avctx->extradata) {
1862 if (avctx->extradata_size < 32 * avctx->channels) {
1863 av_log(avctx, AV_LOG_ERROR, "Missing coeff table\n");
1864 return AVERROR_INVALIDDATA;
1867 bytestream2_init(&tb, avctx->extradata, avctx->extradata_size);
1868 for (i = 0; i < avctx->channels; i++)
1869 for (n = 0; n < 16; n++)
1870 table[i][n] = THP_GET16(tb);
1872 for (i = 0; i < avctx->channels; i++)
1873 for (n = 0; n < 16; n++)
1874 table[i][n] = THP_GET16(gb);
1876 if (!c->has_status) {
1877 /* Initialize the previous sample. */
1878 for (i = 0; i < avctx->channels; i++) {
1879 c->status[i].sample1 = THP_GET16(gb);
1880 c->status[i].sample2 = THP_GET16(gb);
1884 bytestream2_skip(&gb, avctx->channels * 4);
1888 for (ch = 0; ch < avctx->channels; ch++) {
1889 samples = samples_p[ch];
1891 /* Read in every sample for this channel. */
1892 for (i = 0; i < (nb_samples + 13) / 14; i++) {
1893 int byte = bytestream2_get_byteu(&gb);
1894 int index = (byte >> 4) & 7;
1895 unsigned int exp = byte & 0x0F;
1896 int64_t factor1 = table[ch][index * 2];
1897 int64_t factor2 = table[ch][index * 2 + 1];
1899 /* Decode 14 samples. */
1900 for (n = 0; n < 14 && (i * 14 + n < nb_samples); n++) {
1904 sampledat = sign_extend(byte, 4);
1906 byte = bytestream2_get_byteu(&gb);
1907 sampledat = sign_extend(byte >> 4, 4);
1910 sampledat = ((c->status[ch].sample1 * factor1
1911 + c->status[ch].sample2 * factor2) >> 11) + sampledat * (1 << exp);
1912 *samples = av_clip_int16(sampledat);
1913 c->status[ch].sample2 = c->status[ch].sample1;
1914 c->status[ch].sample1 = *samples++;
1920 case AV_CODEC_ID_ADPCM_DTK:
1921 for (channel = 0; channel < avctx->channels; channel++) {
1922 samples = samples_p[channel];
1924 /* Read in every sample for this channel. */
1925 for (i = 0; i < nb_samples / 28; i++) {
1928 bytestream2_skipu(&gb, 1);
1929 header = bytestream2_get_byteu(&gb);
1930 bytestream2_skipu(&gb, 3 - channel);
1932 /* Decode 28 samples. */
1933 for (n = 0; n < 28; n++) {
1934 int32_t sampledat, prev;
1936 switch (header >> 4) {
1938 prev = (c->status[channel].sample1 * 0x3c);
1941 prev = (c->status[channel].sample1 * 0x73) - (c->status[channel].sample2 * 0x34);
1944 prev = (c->status[channel].sample1 * 0x62) - (c->status[channel].sample2 * 0x37);
1950 prev = av_clip_intp2((prev + 0x20) >> 6, 21);
1952 byte = bytestream2_get_byteu(&gb);
1954 sampledat = sign_extend(byte, 4);
1956 sampledat = sign_extend(byte >> 4, 4);
1958 sampledat = ((sampledat * (1 << 12)) >> (header & 0xf)) * (1 << 6) + prev;
1959 *samples++ = av_clip_int16(sampledat >> 6);
1960 c->status[channel].sample2 = c->status[channel].sample1;
1961 c->status[channel].sample1 = sampledat;
1965 bytestream2_seek(&gb, 0, SEEK_SET);
1968 case AV_CODEC_ID_ADPCM_PSX:
1969 for (int block = 0; block < avpkt->size / FFMAX(avctx->block_align, 16 * avctx->channels); block++) {
1970 int nb_samples_per_block = 28 * FFMAX(avctx->block_align, 16 * avctx->channels) / (16 * avctx->channels);
1971 for (channel = 0; channel < avctx->channels; channel++) {
1972 samples = samples_p[channel] + block * nb_samples_per_block;
1973 av_assert0((block + 1) * nb_samples_per_block <= nb_samples);
1975 /* Read in every sample for this channel. */
1976 for (i = 0; i < nb_samples_per_block / 28; i++) {
1977 int filter, shift, flag, byte;
1979 filter = bytestream2_get_byteu(&gb);
1980 shift = filter & 0xf;
1981 filter = filter >> 4;
1982 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table))
1983 return AVERROR_INVALIDDATA;
1984 flag = bytestream2_get_byteu(&gb);
1986 /* Decode 28 samples. */
1987 for (n = 0; n < 28; n++) {
1988 int sample = 0, scale;
1992 scale = sign_extend(byte >> 4, 4);
1994 byte = bytestream2_get_byteu(&gb);
1995 scale = sign_extend(byte, 4);
1998 scale = scale * (1 << 12);
1999 sample = (int)((scale >> shift) + (c->status[channel].sample1 * xa_adpcm_table[filter][0] + c->status[channel].sample2 * xa_adpcm_table[filter][1]) / 64);
2001 *samples++ = av_clip_int16(sample);
2002 c->status[channel].sample2 = c->status[channel].sample1;
2003 c->status[channel].sample1 = sample;
2009 case AV_CODEC_ID_ADPCM_ARGO:
2011 * The format of each block:
2012 * uint8_t left_control;
2013 * uint4_t left_samples[nb_samples];
2014 * ---- and if stereo ----
2015 * uint8_t right_control;
2016 * uint4_t right_samples[nb_samples];
2018 * Format of the control byte:
2019 * MSB [SSSSRDRR] LSB
2020 * S = (Shift Amount - 2)
2024 * Each block relies on the previous two samples of each channel.
2025 * They should be 0 initially.
2027 for (int block = 0; block < avpkt->size / avctx->block_align; block++) {
2028 for (channel = 0; channel < avctx->channels; channel++) {
2031 samples = samples_p[channel] + block * 32;
2032 cs = c->status + channel;
2034 /* Get the control byte and decode the samples, 2 at a time. */
2035 control = bytestream2_get_byteu(&gb);
2036 shift = (control >> 4) + 2;
2038 for (n = 0; n < 16; n++) {
2039 int sample = bytestream2_get_byteu(&gb);
2040 *samples++ = ff_adpcm_argo_expand_nibble(cs, sample >> 4, shift, control & 0x04);
2041 *samples++ = ff_adpcm_argo_expand_nibble(cs, sample >> 0, shift, control & 0x04);
2046 case AV_CODEC_ID_ADPCM_ZORK:
2047 if (!c->has_status) {
2048 for (channel = 0; channel < avctx->channels; channel++) {
2049 c->status[channel].predictor = 0;
2050 c->status[channel].step_index = 0;
2054 for (n = 0; n < nb_samples * avctx->channels; n++) {
2055 int v = bytestream2_get_byteu(&gb);
2056 *samples++ = adpcm_zork_expand_nibble(&c->status[n % avctx->channels], v);
2059 case AV_CODEC_ID_ADPCM_IMA_MTF:
2060 for (n = nb_samples / 2; n > 0; n--) {
2061 for (channel = 0; channel < avctx->channels; channel++) {
2062 int v = bytestream2_get_byteu(&gb);
2063 *samples++ = adpcm_ima_mtf_expand_nibble(&c->status[channel], v >> 4);
2064 samples[st] = adpcm_ima_mtf_expand_nibble(&c->status[channel], v & 0x0F);
2066 samples += avctx->channels;
2070 av_assert0(0); // unsupported codec_id should not happen
2073 if (avpkt->size && bytestream2_tell(&gb) == 0) {
2074 av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n");
2075 return AVERROR_INVALIDDATA;
2080 if (avpkt->size < bytestream2_tell(&gb)) {
2081 av_log(avctx, AV_LOG_ERROR, "Overread of %d < %d\n", avpkt->size, bytestream2_tell(&gb));
2085 return bytestream2_tell(&gb);
2088 static void adpcm_flush(AVCodecContext *avctx)
2090 ADPCMDecodeContext *c = avctx->priv_data;
2095 static const enum AVSampleFormat sample_fmts_s16[] = { AV_SAMPLE_FMT_S16,
2096 AV_SAMPLE_FMT_NONE };
2097 static const enum AVSampleFormat sample_fmts_s16p[] = { AV_SAMPLE_FMT_S16P,
2098 AV_SAMPLE_FMT_NONE };
2099 static const enum AVSampleFormat sample_fmts_both[] = { AV_SAMPLE_FMT_S16,
2101 AV_SAMPLE_FMT_NONE };
2103 #define ADPCM_DECODER(id_, sample_fmts_, name_, long_name_) \
2104 AVCodec ff_ ## name_ ## _decoder = { \
2106 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
2107 .type = AVMEDIA_TYPE_AUDIO, \
2109 .priv_data_size = sizeof(ADPCMDecodeContext), \
2110 .init = adpcm_decode_init, \
2111 .decode = adpcm_decode_frame, \
2112 .flush = adpcm_flush, \
2113 .capabilities = AV_CODEC_CAP_DR1, \
2114 .sample_fmts = sample_fmts_, \
2117 /* Note: Do not forget to add new entries to the Makefile as well. */
2118 ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie");
2119 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC");
2120 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AGM, sample_fmts_s16, adpcm_agm, "ADPCM AmuseGraphics Movie");
2121 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AICA, sample_fmts_s16p, adpcm_aica, "ADPCM Yamaha AICA");
2122 ADPCM_DECODER(AV_CODEC_ID_ADPCM_ARGO, sample_fmts_s16p, adpcm_argo, "ADPCM Argonaut Games");
2123 ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology");
2124 ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK");
2125 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts");
2126 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
2127 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1");
2128 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2");
2129 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3");
2130 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
2131 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV");
2132 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC");
2133 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APM, sample_fmts_s16, adpcm_ima_apm, "ADPCM IMA Ubisoft APM");
2134 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_CUNNING, sample_fmts_s16, adpcm_ima_cunning, "ADPCM IMA Cunning Developments");
2135 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DAT4, sample_fmts_s16, adpcm_ima_dat4, "ADPCM IMA Eurocom DAT4");
2136 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
2137 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
2138 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
2139 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
2140 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
2141 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_MOFLEX, sample_fmts_s16p, adpcm_ima_moflex, "ADPCM IMA MobiClip MOFLEX");
2142 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_MTF, sample_fmts_s16, adpcm_ima_mtf, "ADPCM IMA Capcom's MT Framework");
2143 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI");
2144 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime");
2145 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical");
2146 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SSI, sample_fmts_s16, adpcm_ima_ssi, "ADPCM IMA Simon & Schuster Interactive");
2147 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
2148 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ALP, sample_fmts_s16, adpcm_ima_alp, "ADPCM IMA High Voltage Software ALP");
2149 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV");
2150 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood");
2151 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MS, sample_fmts_both, adpcm_ms, "ADPCM Microsoft");
2152 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MTAF, sample_fmts_s16p, adpcm_mtaf, "ADPCM MTAF");
2153 ADPCM_DECODER(AV_CODEC_ID_ADPCM_PSX, sample_fmts_s16p, adpcm_psx, "ADPCM Playstation");
2154 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
2155 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
2156 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
2157 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash");
2158 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP_LE, sample_fmts_s16p, adpcm_thp_le, "ADPCM Nintendo THP (little-endian)");
2159 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo THP");
2160 ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA");
2161 ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha");
2162 ADPCM_DECODER(AV_CODEC_ID_ADPCM_ZORK, sample_fmts_s16, adpcm_zork, "ADPCM Zork");