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\n", avctx->channels);
133 return AVERROR_PATCHWELCOME;
136 case AV_CODEC_ID_ADPCM_PSX:
139 case AV_CODEC_ID_ADPCM_IMA_DAT4:
140 case AV_CODEC_ID_ADPCM_THP:
141 case AV_CODEC_ID_ADPCM_THP_LE:
145 if (avctx->channels < min_channels || avctx->channels > max_channels) {
146 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
147 return AVERROR(EINVAL);
150 switch(avctx->codec->id) {
151 case AV_CODEC_ID_ADPCM_CT:
152 c->status[0].step = c->status[1].step = 511;
154 case AV_CODEC_ID_ADPCM_IMA_WAV:
155 if (avctx->bits_per_coded_sample < 2 || avctx->bits_per_coded_sample > 5)
156 return AVERROR_INVALIDDATA;
158 case AV_CODEC_ID_ADPCM_IMA_APC:
159 if (avctx->extradata && avctx->extradata_size >= 8) {
160 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata ), 18);
161 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 4), 18);
164 case AV_CODEC_ID_ADPCM_IMA_APM:
165 if (avctx->extradata) {
166 if (avctx->extradata_size >= 28) {
167 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 16), 18);
168 c->status[0].step_index = av_clip(AV_RL32(avctx->extradata + 20), 0, 88);
169 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 4), 18);
170 c->status[1].step_index = av_clip(AV_RL32(avctx->extradata + 8), 0, 88);
171 } else if (avctx->extradata_size >= 16) {
172 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 0), 18);
173 c->status[0].step_index = av_clip(AV_RL32(avctx->extradata + 4), 0, 88);
174 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 8), 18);
175 c->status[1].step_index = av_clip(AV_RL32(avctx->extradata + 12), 0, 88);
179 case AV_CODEC_ID_ADPCM_IMA_WS:
180 if (avctx->extradata && avctx->extradata_size >= 2)
181 c->vqa_version = AV_RL16(avctx->extradata);
183 case AV_CODEC_ID_ADPCM_ARGO:
184 if (avctx->bits_per_coded_sample != 4)
185 return AVERROR_INVALIDDATA;
187 case AV_CODEC_ID_ADPCM_ZORK:
188 if (avctx->bits_per_coded_sample != 8)
189 return AVERROR_INVALIDDATA;
195 switch (avctx->codec->id) {
196 case AV_CODEC_ID_ADPCM_AICA:
197 case AV_CODEC_ID_ADPCM_IMA_DAT4:
198 case AV_CODEC_ID_ADPCM_IMA_QT:
199 case AV_CODEC_ID_ADPCM_IMA_WAV:
200 case AV_CODEC_ID_ADPCM_4XM:
201 case AV_CODEC_ID_ADPCM_XA:
202 case AV_CODEC_ID_ADPCM_EA_R1:
203 case AV_CODEC_ID_ADPCM_EA_R2:
204 case AV_CODEC_ID_ADPCM_EA_R3:
205 case AV_CODEC_ID_ADPCM_EA_XAS:
206 case AV_CODEC_ID_ADPCM_THP:
207 case AV_CODEC_ID_ADPCM_THP_LE:
208 case AV_CODEC_ID_ADPCM_AFC:
209 case AV_CODEC_ID_ADPCM_DTK:
210 case AV_CODEC_ID_ADPCM_PSX:
211 case AV_CODEC_ID_ADPCM_MTAF:
212 case AV_CODEC_ID_ADPCM_ARGO:
213 avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
215 case AV_CODEC_ID_ADPCM_IMA_WS:
216 avctx->sample_fmt = c->vqa_version == 3 ? AV_SAMPLE_FMT_S16P :
219 case AV_CODEC_ID_ADPCM_MS:
220 avctx->sample_fmt = avctx->channels > 2 ? AV_SAMPLE_FMT_S16P :
224 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
230 static inline int16_t adpcm_agm_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
232 int delta, pred, step, add;
237 add = (delta * 2 + 1) * step;
241 if ((nibble & 8) == 0)
242 pred = av_clip(pred + (add >> 3), -32767, 32767);
244 pred = av_clip(pred - (add >> 3), -32767, 32767);
251 c->step = av_clip(c->step * 2, 127, 24576);
269 c->step = av_clip(c->step, 127, 24576);
274 static inline int16_t adpcm_ima_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int shift)
278 int sign, delta, diff, step;
280 step = ff_adpcm_step_table[c->step_index];
281 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
282 step_index = av_clip(step_index, 0, 88);
286 /* perform direct multiplication instead of series of jumps proposed by
287 * the reference ADPCM implementation since modern CPUs can do the mults
289 diff = ((2 * delta + 1) * step) >> shift;
290 predictor = c->predictor;
291 if (sign) predictor -= diff;
292 else predictor += diff;
294 c->predictor = av_clip_int16(predictor);
295 c->step_index = step_index;
297 return (int16_t)c->predictor;
300 static inline int16_t adpcm_ima_alp_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int shift)
304 int sign, delta, diff, step;
306 step = ff_adpcm_step_table[c->step_index];
307 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
308 step_index = av_clip(step_index, 0, 88);
312 diff = (delta * step) >> shift;
313 predictor = c->predictor;
314 if (sign) predictor -= diff;
315 else predictor += diff;
317 c->predictor = av_clip_int16(predictor);
318 c->step_index = step_index;
320 return (int16_t)c->predictor;
323 static inline int16_t adpcm_ima_mtf_expand_nibble(ADPCMChannelStatus *c, int nibble)
325 int step_index, step, delta, predictor;
327 step = ff_adpcm_step_table[c->step_index];
329 delta = step * (2 * nibble - 15);
330 predictor = c->predictor + delta;
332 step_index = c->step_index + mtf_index_table[(unsigned)nibble];
333 c->predictor = av_clip_int16(predictor >> 4);
334 c->step_index = av_clip(step_index, 0, 88);
336 return (int16_t)c->predictor;
339 static inline int16_t adpcm_ima_cunning_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
345 nibble = sign_extend(nibble & 0xF, 4);
347 step = ff_adpcm_ima_cunning_step_table[c->step_index];
348 step_index = c->step_index + ff_adpcm_ima_cunning_index_table[abs(nibble)];
349 step_index = av_clip(step_index, 0, 60);
351 predictor = c->predictor + step * nibble;
353 c->predictor = av_clip_int16(predictor);
354 c->step_index = step_index;
359 static inline int16_t adpcm_ima_wav_expand_nibble(ADPCMChannelStatus *c, GetBitContext *gb, int bps)
361 int nibble, step_index, predictor, sign, delta, diff, step, shift;
364 nibble = get_bits_le(gb, bps),
365 step = ff_adpcm_step_table[c->step_index];
366 step_index = c->step_index + ff_adpcm_index_tables[bps - 2][nibble];
367 step_index = av_clip(step_index, 0, 88);
369 sign = nibble & (1 << shift);
370 delta = av_mod_uintp2(nibble, shift);
371 diff = ((2 * delta + 1) * step) >> shift;
372 predictor = c->predictor;
373 if (sign) predictor -= diff;
374 else predictor += diff;
376 c->predictor = av_clip_int16(predictor);
377 c->step_index = step_index;
379 return (int16_t)c->predictor;
382 static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble)
388 step = ff_adpcm_step_table[c->step_index];
389 step_index = c->step_index + ff_adpcm_index_table[nibble];
390 step_index = av_clip(step_index, 0, 88);
393 if (nibble & 4) diff += step;
394 if (nibble & 2) diff += step >> 1;
395 if (nibble & 1) diff += step >> 2;
398 predictor = c->predictor - diff;
400 predictor = c->predictor + diff;
402 c->predictor = av_clip_int16(predictor);
403 c->step_index = step_index;
408 static inline int16_t adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble)
412 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
413 predictor += ((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
415 c->sample2 = c->sample1;
416 c->sample1 = av_clip_int16(predictor);
417 c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8;
418 if (c->idelta < 16) c->idelta = 16;
419 if (c->idelta > INT_MAX/768) {
420 av_log(NULL, AV_LOG_WARNING, "idelta overflow\n");
421 c->idelta = INT_MAX/768;
427 static inline int16_t adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble)
429 int step_index, predictor, sign, delta, diff, step;
431 step = ff_adpcm_oki_step_table[c->step_index];
432 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
433 step_index = av_clip(step_index, 0, 48);
437 diff = ((2 * delta + 1) * step) >> 3;
438 predictor = c->predictor;
439 if (sign) predictor -= diff;
440 else predictor += diff;
442 c->predictor = av_clip_intp2(predictor, 11);
443 c->step_index = step_index;
445 return c->predictor * 16;
448 static inline int16_t adpcm_ct_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
450 int sign, delta, diff;
455 /* perform direct multiplication instead of series of jumps proposed by
456 * the reference ADPCM implementation since modern CPUs can do the mults
458 diff = ((2 * delta + 1) * c->step) >> 3;
459 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
460 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
461 c->predictor = av_clip_int16(c->predictor);
462 /* calculate new step and clamp it to range 511..32767 */
463 new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
464 c->step = av_clip(new_step, 511, 32767);
466 return (int16_t)c->predictor;
469 static inline int16_t adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int size, int shift)
471 int sign, delta, diff;
473 sign = nibble & (1<<(size-1));
474 delta = nibble & ((1<<(size-1))-1);
475 diff = delta << (7 + c->step + shift);
478 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
480 /* calculate new step */
481 if (delta >= (2*size - 3) && c->step < 3)
483 else if (delta == 0 && c->step > 0)
486 return (int16_t) c->predictor;
489 static inline int16_t adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
496 c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
497 c->predictor = av_clip_int16(c->predictor);
498 c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
499 c->step = av_clip(c->step, 127, 24576);
503 static inline int16_t adpcm_mtaf_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
505 c->predictor += ff_adpcm_mtaf_stepsize[c->step][nibble];
506 c->predictor = av_clip_int16(c->predictor);
507 c->step += ff_adpcm_index_table[nibble];
508 c->step = av_clip_uintp2(c->step, 5);
512 static inline int16_t adpcm_zork_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
514 int16_t index = c->step_index;
515 uint32_t lookup_sample = ff_adpcm_step_table[index];
519 sample += lookup_sample;
521 sample += lookup_sample >> 1;
523 sample += lookup_sample >> 2;
525 sample += lookup_sample >> 3;
527 sample += lookup_sample >> 4;
529 sample += lookup_sample >> 5;
531 sample += lookup_sample >> 6;
535 sample += c->predictor;
536 sample = av_clip_int16(sample);
538 index += zork_index_table[(nibble >> 4) & 7];
539 index = av_clip(index, 0, 88);
541 c->predictor = sample;
542 c->step_index = index;
547 static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1,
548 const uint8_t *in, ADPCMChannelStatus *left,
549 ADPCMChannelStatus *right, int channels, int sample_offset)
552 int shift,filter,f0,f1;
556 out0 += sample_offset;
560 out1 += sample_offset;
563 shift = 12 - (in[4+i*2] & 15);
564 filter = in[4+i*2] >> 4;
565 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
566 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
570 avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift);
573 f0 = xa_adpcm_table[filter][0];
574 f1 = xa_adpcm_table[filter][1];
582 t = sign_extend(d, 4);
583 s = t*(1<<shift) + ((s_1*f0 + s_2*f1+32)>>6);
585 s_1 = av_clip_int16(s);
592 s_1 = right->sample1;
593 s_2 = right->sample2;
596 shift = 12 - (in[5+i*2] & 15);
597 filter = in[5+i*2] >> 4;
598 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table) || shift < 0) {
599 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
603 avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift);
607 f0 = xa_adpcm_table[filter][0];
608 f1 = xa_adpcm_table[filter][1];
613 t = sign_extend(d >> 4, 4);
614 s = t*(1<<shift) + ((s_1*f0 + s_2*f1+32)>>6);
616 s_1 = av_clip_int16(s);
621 right->sample1 = s_1;
622 right->sample2 = s_2;
628 out0 += 28 * (3 - channels);
629 out1 += 28 * (3 - channels);
635 static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples)
637 ADPCMDecodeContext *c = avctx->priv_data;
640 int k0, signmask, nb_bits, count;
641 int size = buf_size*8;
644 init_get_bits(&gb, buf, size);
646 //read bits & initial values
647 nb_bits = get_bits(&gb, 2)+2;
648 table = swf_index_tables[nb_bits-2];
649 k0 = 1 << (nb_bits-2);
650 signmask = 1 << (nb_bits-1);
652 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
653 for (i = 0; i < avctx->channels; i++) {
654 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
655 c->status[i].step_index = get_bits(&gb, 6);
658 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
661 for (i = 0; i < avctx->channels; i++) {
662 // similar to IMA adpcm
663 int delta = get_bits(&gb, nb_bits);
664 int step = ff_adpcm_step_table[c->status[i].step_index];
665 int vpdiff = 0; // vpdiff = (delta+0.5)*step/4
676 if (delta & signmask)
677 c->status[i].predictor -= vpdiff;
679 c->status[i].predictor += vpdiff;
681 c->status[i].step_index += table[delta & (~signmask)];
683 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
684 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
686 *samples++ = c->status[i].predictor;
692 static inline int16_t adpcm_argo_expand_nibble(ADPCMChannelStatus *cs, int nibble, int control, int shift)
694 int sample = nibble * (1 << shift);
697 sample += (8 * cs->sample1) - (4 * cs->sample2);
699 sample += 4 * cs->sample1;
701 sample = av_clip_int16(sample >> 2);
703 cs->sample2 = cs->sample1;
704 cs->sample1 = sample;
710 * Get the number of samples (per channel) that will be decoded from the packet.
711 * In one case, this is actually the maximum number of samples possible to
712 * decode with the given buf_size.
714 * @param[out] coded_samples set to the number of samples as coded in the
715 * packet, or 0 if the codec does not encode the
716 * number of samples in each frame.
717 * @param[out] approx_nb_samples set to non-zero if the number of samples
718 * returned is an approximation.
720 static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
721 int buf_size, int *coded_samples, int *approx_nb_samples)
723 ADPCMDecodeContext *s = avctx->priv_data;
725 int ch = avctx->channels;
726 int has_coded_samples = 0;
730 *approx_nb_samples = 0;
735 switch (avctx->codec->id) {
736 /* constant, only check buf_size */
737 case AV_CODEC_ID_ADPCM_EA_XAS:
738 if (buf_size < 76 * ch)
742 case AV_CODEC_ID_ADPCM_IMA_QT:
743 if (buf_size < 34 * ch)
747 case AV_CODEC_ID_ADPCM_ARGO:
748 if (buf_size < 17 * ch)
752 /* simple 4-bit adpcm */
753 case AV_CODEC_ID_ADPCM_CT:
754 case AV_CODEC_ID_ADPCM_IMA_APC:
755 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
756 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
757 case AV_CODEC_ID_ADPCM_IMA_OKI:
758 case AV_CODEC_ID_ADPCM_IMA_WS:
759 case AV_CODEC_ID_ADPCM_YAMAHA:
760 case AV_CODEC_ID_ADPCM_AICA:
761 case AV_CODEC_ID_ADPCM_IMA_SSI:
762 case AV_CODEC_ID_ADPCM_IMA_APM:
763 case AV_CODEC_ID_ADPCM_IMA_ALP:
764 case AV_CODEC_ID_ADPCM_IMA_MTF:
765 nb_samples = buf_size * 2 / ch;
771 /* simple 4-bit adpcm, with header */
773 switch (avctx->codec->id) {
774 case AV_CODEC_ID_ADPCM_4XM:
775 case AV_CODEC_ID_ADPCM_AGM:
776 case AV_CODEC_ID_ADPCM_IMA_DAT4:
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_ZORK:
924 nb_samples = buf_size / ch;
928 /* validate coded sample count */
929 if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
930 return AVERROR_INVALIDDATA;
935 static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
936 int *got_frame_ptr, AVPacket *avpkt)
938 AVFrame *frame = data;
939 const uint8_t *buf = avpkt->data;
940 int buf_size = avpkt->size;
941 ADPCMDecodeContext *c = avctx->priv_data;
942 ADPCMChannelStatus *cs;
943 int n, m, channel, i;
948 int nb_samples, coded_samples, approx_nb_samples, ret;
951 bytestream2_init(&gb, buf, buf_size);
952 nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples, &approx_nb_samples);
953 if (nb_samples <= 0) {
954 av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
955 return AVERROR_INVALIDDATA;
958 /* get output buffer */
959 frame->nb_samples = nb_samples;
960 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
962 samples = (int16_t *)frame->data[0];
963 samples_p = (int16_t **)frame->extended_data;
965 /* use coded_samples when applicable */
966 /* it is always <= nb_samples, so the output buffer will be large enough */
968 if (!approx_nb_samples && coded_samples != nb_samples)
969 av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
970 frame->nb_samples = nb_samples = coded_samples;
973 st = avctx->channels == 2 ? 1 : 0;
975 switch(avctx->codec->id) {
976 case AV_CODEC_ID_ADPCM_IMA_QT:
977 /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
978 Channel data is interleaved per-chunk. */
979 for (channel = 0; channel < avctx->channels; channel++) {
982 cs = &(c->status[channel]);
983 /* (pppppp) (piiiiiii) */
985 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
986 predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
987 step_index = predictor & 0x7F;
990 if (cs->step_index == step_index) {
991 int diff = predictor - cs->predictor;
998 cs->step_index = step_index;
999 cs->predictor = predictor;
1002 if (cs->step_index > 88u){
1003 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1004 channel, cs->step_index);
1005 return AVERROR_INVALIDDATA;
1008 samples = samples_p[channel];
1010 for (m = 0; m < 64; m += 2) {
1011 int byte = bytestream2_get_byteu(&gb);
1012 samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F);
1013 samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 );
1017 case AV_CODEC_ID_ADPCM_IMA_WAV:
1018 for(i=0; i<avctx->channels; i++){
1019 cs = &(c->status[i]);
1020 cs->predictor = samples_p[i][0] = sign_extend(bytestream2_get_le16u(&gb), 16);
1022 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1023 if (cs->step_index > 88u){
1024 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1026 return AVERROR_INVALIDDATA;
1030 if (avctx->bits_per_coded_sample != 4) {
1031 int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
1032 int block_size = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
1033 uint8_t temp[20 + AV_INPUT_BUFFER_PADDING_SIZE] = { 0 };
1036 for (n = 0; n < (nb_samples - 1) / samples_per_block; n++) {
1037 for (i = 0; i < avctx->channels; i++) {
1041 samples = &samples_p[i][1 + n * samples_per_block];
1042 for (j = 0; j < block_size; j++) {
1043 temp[j] = buf[4 * avctx->channels + block_size * n * avctx->channels +
1044 (j % 4) + (j / 4) * (avctx->channels * 4) + i * 4];
1046 ret = init_get_bits8(&g, (const uint8_t *)&temp, block_size);
1049 for (m = 0; m < samples_per_block; m++) {
1050 samples[m] = adpcm_ima_wav_expand_nibble(cs, &g,
1051 avctx->bits_per_coded_sample);
1055 bytestream2_skip(&gb, avctx->block_align - avctx->channels * 4);
1057 for (n = 0; n < (nb_samples - 1) / 8; n++) {
1058 for (i = 0; i < avctx->channels; i++) {
1060 samples = &samples_p[i][1 + n * 8];
1061 for (m = 0; m < 8; m += 2) {
1062 int v = bytestream2_get_byteu(&gb);
1063 samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
1064 samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
1070 case AV_CODEC_ID_ADPCM_4XM:
1071 for (i = 0; i < avctx->channels; i++)
1072 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1074 for (i = 0; i < avctx->channels; i++) {
1075 c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1076 if (c->status[i].step_index > 88u) {
1077 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1078 i, c->status[i].step_index);
1079 return AVERROR_INVALIDDATA;
1083 for (i = 0; i < avctx->channels; i++) {
1084 samples = (int16_t *)frame->data[i];
1086 for (n = nb_samples >> 1; n > 0; n--) {
1087 int v = bytestream2_get_byteu(&gb);
1088 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
1089 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
1093 case AV_CODEC_ID_ADPCM_AGM:
1094 for (i = 0; i < avctx->channels; i++)
1095 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1096 for (i = 0; i < avctx->channels; i++)
1097 c->status[i].step = sign_extend(bytestream2_get_le16u(&gb), 16);
1099 for (n = 0; n < nb_samples >> (1 - st); n++) {
1100 int v = bytestream2_get_byteu(&gb);
1101 *samples++ = adpcm_agm_expand_nibble(&c->status[0], v & 0xF);
1102 *samples++ = adpcm_agm_expand_nibble(&c->status[st], v >> 4 );
1105 case AV_CODEC_ID_ADPCM_MS:
1107 int block_predictor;
1109 if (avctx->channels > 2) {
1110 for (channel = 0; channel < avctx->channels; channel++) {
1111 samples = samples_p[channel];
1112 block_predictor = bytestream2_get_byteu(&gb);
1113 if (block_predictor > 6) {
1114 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[%d] = %d\n",
1115 channel, block_predictor);
1116 return AVERROR_INVALIDDATA;
1118 c->status[channel].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1119 c->status[channel].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1120 c->status[channel].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1121 c->status[channel].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1122 c->status[channel].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1123 *samples++ = c->status[channel].sample2;
1124 *samples++ = c->status[channel].sample1;
1125 for(n = (nb_samples - 2) >> 1; n > 0; n--) {
1126 int byte = bytestream2_get_byteu(&gb);
1127 *samples++ = adpcm_ms_expand_nibble(&c->status[channel], byte >> 4 );
1128 *samples++ = adpcm_ms_expand_nibble(&c->status[channel], byte & 0x0F);
1132 block_predictor = bytestream2_get_byteu(&gb);
1133 if (block_predictor > 6) {
1134 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n",
1136 return AVERROR_INVALIDDATA;
1138 c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1139 c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1141 block_predictor = bytestream2_get_byteu(&gb);
1142 if (block_predictor > 6) {
1143 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n",
1145 return AVERROR_INVALIDDATA;
1147 c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1148 c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1150 c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1152 c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1155 c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1156 if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1157 c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1158 if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1160 *samples++ = c->status[0].sample2;
1161 if (st) *samples++ = c->status[1].sample2;
1162 *samples++ = c->status[0].sample1;
1163 if (st) *samples++ = c->status[1].sample1;
1164 for(n = (nb_samples - 2) >> (1 - st); n > 0; n--) {
1165 int byte = bytestream2_get_byteu(&gb);
1166 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 );
1167 *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F);
1172 case AV_CODEC_ID_ADPCM_MTAF:
1173 for (channel = 0; channel < avctx->channels; channel+=2) {
1174 bytestream2_skipu(&gb, 4);
1175 c->status[channel ].step = bytestream2_get_le16u(&gb) & 0x1f;
1176 c->status[channel + 1].step = bytestream2_get_le16u(&gb) & 0x1f;
1177 c->status[channel ].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1178 bytestream2_skipu(&gb, 2);
1179 c->status[channel + 1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1180 bytestream2_skipu(&gb, 2);
1181 for (n = 0; n < nb_samples; n+=2) {
1182 int v = bytestream2_get_byteu(&gb);
1183 samples_p[channel][n ] = adpcm_mtaf_expand_nibble(&c->status[channel], v & 0x0F);
1184 samples_p[channel][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel], v >> 4 );
1186 for (n = 0; n < nb_samples; n+=2) {
1187 int v = bytestream2_get_byteu(&gb);
1188 samples_p[channel + 1][n ] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v & 0x0F);
1189 samples_p[channel + 1][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v >> 4 );
1193 case AV_CODEC_ID_ADPCM_IMA_DK4:
1194 for (channel = 0; channel < avctx->channels; channel++) {
1195 cs = &c->status[channel];
1196 cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16);
1197 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1198 if (cs->step_index > 88u){
1199 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1200 channel, cs->step_index);
1201 return AVERROR_INVALIDDATA;
1204 for (n = (nb_samples - 1) >> (1 - st); n > 0; n--) {
1205 int v = bytestream2_get_byteu(&gb);
1206 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
1207 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
1210 case AV_CODEC_ID_ADPCM_IMA_DK3:
1214 int decode_top_nibble_next = 0;
1216 const int16_t *samples_end = samples + avctx->channels * nb_samples;
1218 bytestream2_skipu(&gb, 10);
1219 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1220 c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1221 c->status[0].step_index = bytestream2_get_byteu(&gb);
1222 c->status[1].step_index = bytestream2_get_byteu(&gb);
1223 if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){
1224 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n",
1225 c->status[0].step_index, c->status[1].step_index);
1226 return AVERROR_INVALIDDATA;
1228 /* sign extend the predictors */
1229 diff_channel = c->status[1].predictor;
1231 /* DK3 ADPCM support macro */
1232 #define DK3_GET_NEXT_NIBBLE() \
1233 if (decode_top_nibble_next) { \
1234 nibble = last_byte >> 4; \
1235 decode_top_nibble_next = 0; \
1237 last_byte = bytestream2_get_byteu(&gb); \
1238 nibble = last_byte & 0x0F; \
1239 decode_top_nibble_next = 1; \
1242 while (samples < samples_end) {
1244 /* for this algorithm, c->status[0] is the sum channel and
1245 * c->status[1] is the diff channel */
1247 /* process the first predictor of the sum channel */
1248 DK3_GET_NEXT_NIBBLE();
1249 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1251 /* process the diff channel predictor */
1252 DK3_GET_NEXT_NIBBLE();
1253 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
1255 /* process the first pair of stereo PCM samples */
1256 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1257 *samples++ = c->status[0].predictor + c->status[1].predictor;
1258 *samples++ = c->status[0].predictor - c->status[1].predictor;
1260 /* process the second predictor of the sum channel */
1261 DK3_GET_NEXT_NIBBLE();
1262 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1264 /* process the second pair of stereo PCM samples */
1265 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1266 *samples++ = c->status[0].predictor + c->status[1].predictor;
1267 *samples++ = c->status[0].predictor - c->status[1].predictor;
1270 if ((bytestream2_tell(&gb) & 1))
1271 bytestream2_skip(&gb, 1);
1274 case AV_CODEC_ID_ADPCM_IMA_ISS:
1275 for (channel = 0; channel < avctx->channels; channel++) {
1276 cs = &c->status[channel];
1277 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1278 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1279 if (cs->step_index > 88u){
1280 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1281 channel, cs->step_index);
1282 return AVERROR_INVALIDDATA;
1286 for (n = nb_samples >> (1 - st); n > 0; n--) {
1288 int v = bytestream2_get_byteu(&gb);
1289 /* nibbles are swapped for mono */
1297 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
1298 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
1301 case AV_CODEC_ID_ADPCM_IMA_DAT4:
1302 for (channel = 0; channel < avctx->channels; channel++) {
1303 cs = &c->status[channel];
1304 samples = samples_p[channel];
1305 bytestream2_skip(&gb, 4);
1306 for (n = 0; n < nb_samples; n += 2) {
1307 int v = bytestream2_get_byteu(&gb);
1308 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
1309 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
1313 case AV_CODEC_ID_ADPCM_IMA_APC:
1314 for (n = nb_samples >> (1 - st); n > 0; n--) {
1315 int v = bytestream2_get_byteu(&gb);
1316 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
1317 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
1320 case AV_CODEC_ID_ADPCM_IMA_SSI:
1321 for (n = nb_samples >> (1 - st); n > 0; n--) {
1322 int v = bytestream2_get_byteu(&gb);
1323 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0], v >> 4 );
1324 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0x0F);
1327 case AV_CODEC_ID_ADPCM_IMA_APM:
1328 for (n = nb_samples / 2; n > 0; n--) {
1329 for (channel = 0; channel < avctx->channels; channel++) {
1330 int v = bytestream2_get_byteu(&gb);
1331 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[channel], v >> 4 );
1332 samples[st] = adpcm_ima_qt_expand_nibble(&c->status[channel], v & 0x0F);
1334 samples += avctx->channels;
1337 case AV_CODEC_ID_ADPCM_IMA_ALP:
1338 for (n = nb_samples / 2; n > 0; n--) {
1339 for (channel = 0; channel < avctx->channels; channel++) {
1340 int v = bytestream2_get_byteu(&gb);
1341 *samples++ = adpcm_ima_alp_expand_nibble(&c->status[channel], v >> 4 , 2);
1342 samples[st] = adpcm_ima_alp_expand_nibble(&c->status[channel], v & 0x0F, 2);
1344 samples += avctx->channels;
1347 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
1348 for (n = 0; n < nb_samples / 2; n++) {
1349 int v = bytestream2_get_byteu(&gb);
1350 *samples++ = adpcm_ima_cunning_expand_nibble(&c->status[0], v & 0x0F);
1351 *samples++ = adpcm_ima_cunning_expand_nibble(&c->status[0], v >> 4);
1354 case AV_CODEC_ID_ADPCM_IMA_OKI:
1355 for (n = nb_samples >> (1 - st); n > 0; n--) {
1356 int v = bytestream2_get_byteu(&gb);
1357 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 );
1358 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F);
1361 case AV_CODEC_ID_ADPCM_IMA_RAD:
1362 for (channel = 0; channel < avctx->channels; channel++) {
1363 cs = &c->status[channel];
1364 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1365 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1366 if (cs->step_index > 88u){
1367 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1368 channel, cs->step_index);
1369 return AVERROR_INVALIDDATA;
1372 for (n = 0; n < nb_samples / 2; n++) {
1375 byte[0] = bytestream2_get_byteu(&gb);
1377 byte[1] = bytestream2_get_byteu(&gb);
1378 for(channel = 0; channel < avctx->channels; channel++) {
1379 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] & 0x0F, 3);
1381 for(channel = 0; channel < avctx->channels; channel++) {
1382 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] >> 4 , 3);
1386 case AV_CODEC_ID_ADPCM_IMA_WS:
1387 if (c->vqa_version == 3) {
1388 for (channel = 0; channel < avctx->channels; channel++) {
1389 int16_t *smp = samples_p[channel];
1391 for (n = nb_samples / 2; n > 0; n--) {
1392 int v = bytestream2_get_byteu(&gb);
1393 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1394 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1398 for (n = nb_samples / 2; n > 0; n--) {
1399 for (channel = 0; channel < avctx->channels; channel++) {
1400 int v = bytestream2_get_byteu(&gb);
1401 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1402 samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1404 samples += avctx->channels;
1407 bytestream2_seek(&gb, 0, SEEK_END);
1409 case AV_CODEC_ID_ADPCM_XA:
1411 int16_t *out0 = samples_p[0];
1412 int16_t *out1 = samples_p[1];
1413 int samples_per_block = 28 * (3 - avctx->channels) * 4;
1414 int sample_offset = 0;
1415 int bytes_remaining;
1416 while (bytestream2_get_bytes_left(&gb) >= 128) {
1417 if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb),
1418 &c->status[0], &c->status[1],
1419 avctx->channels, sample_offset)) < 0)
1421 bytestream2_skipu(&gb, 128);
1422 sample_offset += samples_per_block;
1424 /* Less than a full block of data left, e.g. when reading from
1425 * 2324 byte per sector XA; the remainder is padding */
1426 bytes_remaining = bytestream2_get_bytes_left(&gb);
1427 if (bytes_remaining > 0) {
1428 bytestream2_skip(&gb, bytes_remaining);
1432 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
1433 for (i=0; i<=st; i++) {
1434 c->status[i].step_index = bytestream2_get_le32u(&gb);
1435 if (c->status[i].step_index > 88u) {
1436 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1437 i, c->status[i].step_index);
1438 return AVERROR_INVALIDDATA;
1441 for (i=0; i<=st; i++) {
1442 c->status[i].predictor = bytestream2_get_le32u(&gb);
1443 if (FFABS((int64_t)c->status[i].predictor) > (1<<16))
1444 return AVERROR_INVALIDDATA;
1447 for (n = nb_samples >> (1 - st); n > 0; n--) {
1448 int byte = bytestream2_get_byteu(&gb);
1449 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3);
1450 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3);
1453 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1454 for (n = nb_samples >> (1 - st); n > 0; n--) {
1455 int byte = bytestream2_get_byteu(&gb);
1456 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6);
1457 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6);
1460 case AV_CODEC_ID_ADPCM_EA:
1462 int previous_left_sample, previous_right_sample;
1463 int current_left_sample, current_right_sample;
1464 int next_left_sample, next_right_sample;
1465 int coeff1l, coeff2l, coeff1r, coeff2r;
1466 int shift_left, shift_right;
1468 /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
1469 each coding 28 stereo samples. */
1471 if(avctx->channels != 2)
1472 return AVERROR_INVALIDDATA;
1474 current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1475 previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1476 current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1477 previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1479 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1480 int byte = bytestream2_get_byteu(&gb);
1481 coeff1l = ea_adpcm_table[ byte >> 4 ];
1482 coeff2l = ea_adpcm_table[(byte >> 4 ) + 4];
1483 coeff1r = ea_adpcm_table[ byte & 0x0F];
1484 coeff2r = ea_adpcm_table[(byte & 0x0F) + 4];
1486 byte = bytestream2_get_byteu(&gb);
1487 shift_left = 20 - (byte >> 4);
1488 shift_right = 20 - (byte & 0x0F);
1490 for (count2 = 0; count2 < 28; count2++) {
1491 byte = bytestream2_get_byteu(&gb);
1492 next_left_sample = sign_extend(byte >> 4, 4) * (1 << shift_left);
1493 next_right_sample = sign_extend(byte, 4) * (1 << shift_right);
1495 next_left_sample = (next_left_sample +
1496 (current_left_sample * coeff1l) +
1497 (previous_left_sample * coeff2l) + 0x80) >> 8;
1498 next_right_sample = (next_right_sample +
1499 (current_right_sample * coeff1r) +
1500 (previous_right_sample * coeff2r) + 0x80) >> 8;
1502 previous_left_sample = current_left_sample;
1503 current_left_sample = av_clip_int16(next_left_sample);
1504 previous_right_sample = current_right_sample;
1505 current_right_sample = av_clip_int16(next_right_sample);
1506 *samples++ = current_left_sample;
1507 *samples++ = current_right_sample;
1511 bytestream2_skip(&gb, 2); // Skip terminating 0x0000
1515 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
1517 int coeff[2][2], shift[2];
1519 for(channel = 0; channel < avctx->channels; channel++) {
1520 int byte = bytestream2_get_byteu(&gb);
1522 coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i];
1523 shift[channel] = 20 - (byte & 0x0F);
1525 for (count1 = 0; count1 < nb_samples / 2; count1++) {
1528 byte[0] = bytestream2_get_byteu(&gb);
1529 if (st) byte[1] = bytestream2_get_byteu(&gb);
1530 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1531 for(channel = 0; channel < avctx->channels; channel++) {
1532 int sample = sign_extend(byte[channel] >> i, 4) * (1 << shift[channel]);
1534 c->status[channel].sample1 * coeff[channel][0] +
1535 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1536 c->status[channel].sample2 = c->status[channel].sample1;
1537 c->status[channel].sample1 = av_clip_int16(sample);
1538 *samples++ = c->status[channel].sample1;
1542 bytestream2_seek(&gb, 0, SEEK_END);
1545 case AV_CODEC_ID_ADPCM_EA_R1:
1546 case AV_CODEC_ID_ADPCM_EA_R2:
1547 case AV_CODEC_ID_ADPCM_EA_R3: {
1548 /* channel numbering
1550 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1551 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1552 const int big_endian = avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R3;
1553 int previous_sample, current_sample, next_sample;
1556 unsigned int channel;
1561 for (channel=0; channel<avctx->channels; channel++)
1562 offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) :
1563 bytestream2_get_le32(&gb)) +
1564 (avctx->channels + 1) * 4;
1566 for (channel=0; channel<avctx->channels; channel++) {
1567 bytestream2_seek(&gb, offsets[channel], SEEK_SET);
1568 samplesC = samples_p[channel];
1570 if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) {
1571 current_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1572 previous_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1574 current_sample = c->status[channel].predictor;
1575 previous_sample = c->status[channel].prev_sample;
1578 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1579 int byte = bytestream2_get_byte(&gb);
1580 if (byte == 0xEE) { /* only seen in R2 and R3 */
1581 current_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1582 previous_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1584 for (count2=0; count2<28; count2++)
1585 *samplesC++ = sign_extend(bytestream2_get_be16(&gb), 16);
1587 coeff1 = ea_adpcm_table[ byte >> 4 ];
1588 coeff2 = ea_adpcm_table[(byte >> 4) + 4];
1589 shift = 20 - (byte & 0x0F);
1591 for (count2=0; count2<28; count2++) {
1593 next_sample = (unsigned)sign_extend(byte, 4) << shift;
1595 byte = bytestream2_get_byte(&gb);
1596 next_sample = (unsigned)sign_extend(byte >> 4, 4) << shift;
1599 next_sample += (current_sample * coeff1) +
1600 (previous_sample * coeff2);
1601 next_sample = av_clip_int16(next_sample >> 8);
1603 previous_sample = current_sample;
1604 current_sample = next_sample;
1605 *samplesC++ = current_sample;
1611 } else if (count != count1) {
1612 av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
1613 count = FFMAX(count, count1);
1616 if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) {
1617 c->status[channel].predictor = current_sample;
1618 c->status[channel].prev_sample = previous_sample;
1622 frame->nb_samples = count * 28;
1623 bytestream2_seek(&gb, 0, SEEK_END);
1626 case AV_CODEC_ID_ADPCM_EA_XAS:
1627 for (channel=0; channel<avctx->channels; channel++) {
1628 int coeff[2][4], shift[4];
1629 int16_t *s = samples_p[channel];
1630 for (n = 0; n < 4; n++, s += 32) {
1631 int val = sign_extend(bytestream2_get_le16u(&gb), 16);
1633 coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i];
1636 val = sign_extend(bytestream2_get_le16u(&gb), 16);
1637 shift[n] = 20 - (val & 0x0F);
1641 for (m=2; m<32; m+=2) {
1642 s = &samples_p[channel][m];
1643 for (n = 0; n < 4; n++, s += 32) {
1645 int byte = bytestream2_get_byteu(&gb);
1647 level = sign_extend(byte >> 4, 4) * (1 << shift[n]);
1648 pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n];
1649 s[0] = av_clip_int16((level + pred + 0x80) >> 8);
1651 level = sign_extend(byte, 4) * (1 << shift[n]);
1652 pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n];
1653 s[1] = av_clip_int16((level + pred + 0x80) >> 8);
1658 case AV_CODEC_ID_ADPCM_IMA_AMV:
1659 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1660 c->status[0].step_index = bytestream2_get_byteu(&gb);
1661 bytestream2_skipu(&gb, 5);
1662 if (c->status[0].step_index > 88u) {
1663 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1664 c->status[0].step_index);
1665 return AVERROR_INVALIDDATA;
1668 for (n = nb_samples >> (1 - st); n > 0; n--) {
1669 int v = bytestream2_get_byteu(&gb);
1671 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3);
1672 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3);
1675 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1676 for (i = 0; i < avctx->channels; i++) {
1677 c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
1678 c->status[i].step_index = bytestream2_get_byteu(&gb);
1679 bytestream2_skipu(&gb, 1);
1680 if (c->status[i].step_index > 88u) {
1681 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1682 c->status[i].step_index);
1683 return AVERROR_INVALIDDATA;
1687 for (n = nb_samples >> (1 - st); n > 0; n--) {
1688 int v = bytestream2_get_byteu(&gb);
1690 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4 );
1691 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf);
1694 case AV_CODEC_ID_ADPCM_CT:
1695 for (n = nb_samples >> (1 - st); n > 0; n--) {
1696 int v = bytestream2_get_byteu(&gb);
1697 *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
1698 *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
1701 case AV_CODEC_ID_ADPCM_SBPRO_4:
1702 case AV_CODEC_ID_ADPCM_SBPRO_3:
1703 case AV_CODEC_ID_ADPCM_SBPRO_2:
1704 if (!c->status[0].step_index) {
1705 /* the first byte is a raw sample */
1706 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1708 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1709 c->status[0].step_index = 1;
1712 if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) {
1713 for (n = nb_samples >> (1 - st); n > 0; n--) {
1714 int byte = bytestream2_get_byteu(&gb);
1715 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1717 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1720 } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) {
1721 for (n = (nb_samples<<st) / 3; n > 0; n--) {
1722 int byte = bytestream2_get_byteu(&gb);
1723 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1725 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1726 (byte >> 2) & 0x07, 3, 0);
1727 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1731 for (n = nb_samples >> (2 - st); n > 0; n--) {
1732 int byte = bytestream2_get_byteu(&gb);
1733 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1735 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1736 (byte >> 4) & 0x03, 2, 2);
1737 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1738 (byte >> 2) & 0x03, 2, 2);
1739 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1744 case AV_CODEC_ID_ADPCM_SWF:
1745 adpcm_swf_decode(avctx, buf, buf_size, samples);
1746 bytestream2_seek(&gb, 0, SEEK_END);
1748 case AV_CODEC_ID_ADPCM_YAMAHA:
1749 for (n = nb_samples >> (1 - st); n > 0; n--) {
1750 int v = bytestream2_get_byteu(&gb);
1751 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
1752 *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
1755 case AV_CODEC_ID_ADPCM_AICA:
1756 if (!c->has_status) {
1757 for (channel = 0; channel < avctx->channels; channel++)
1758 c->status[channel].step = 0;
1761 for (channel = 0; channel < avctx->channels; channel++) {
1762 samples = samples_p[channel];
1763 for (n = nb_samples >> 1; n > 0; n--) {
1764 int v = bytestream2_get_byteu(&gb);
1765 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v & 0x0F);
1766 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v >> 4 );
1770 case AV_CODEC_ID_ADPCM_AFC:
1772 int samples_per_block;
1775 if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) {
1776 samples_per_block = avctx->extradata[0] / 16;
1777 blocks = nb_samples / avctx->extradata[0];
1779 samples_per_block = nb_samples / 16;
1783 for (m = 0; m < blocks; m++) {
1784 for (channel = 0; channel < avctx->channels; channel++) {
1785 int prev1 = c->status[channel].sample1;
1786 int prev2 = c->status[channel].sample2;
1788 samples = samples_p[channel] + m * 16;
1789 /* Read in every sample for this channel. */
1790 for (i = 0; i < samples_per_block; i++) {
1791 int byte = bytestream2_get_byteu(&gb);
1792 int scale = 1 << (byte >> 4);
1793 int index = byte & 0xf;
1794 int factor1 = ff_adpcm_afc_coeffs[0][index];
1795 int factor2 = ff_adpcm_afc_coeffs[1][index];
1797 /* Decode 16 samples. */
1798 for (n = 0; n < 16; n++) {
1802 sampledat = sign_extend(byte, 4);
1804 byte = bytestream2_get_byteu(&gb);
1805 sampledat = sign_extend(byte >> 4, 4);
1808 sampledat = ((prev1 * factor1 + prev2 * factor2) >> 11) +
1810 *samples = av_clip_int16(sampledat);
1816 c->status[channel].sample1 = prev1;
1817 c->status[channel].sample2 = prev2;
1820 bytestream2_seek(&gb, 0, SEEK_END);
1823 case AV_CODEC_ID_ADPCM_THP:
1824 case AV_CODEC_ID_ADPCM_THP_LE:
1829 #define THP_GET16(g) \
1831 avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE ? \
1832 bytestream2_get_le16u(&(g)) : \
1833 bytestream2_get_be16u(&(g)), 16)
1835 if (avctx->extradata) {
1837 if (avctx->extradata_size < 32 * avctx->channels) {
1838 av_log(avctx, AV_LOG_ERROR, "Missing coeff table\n");
1839 return AVERROR_INVALIDDATA;
1842 bytestream2_init(&tb, avctx->extradata, avctx->extradata_size);
1843 for (i = 0; i < avctx->channels; i++)
1844 for (n = 0; n < 16; n++)
1845 table[i][n] = THP_GET16(tb);
1847 for (i = 0; i < avctx->channels; i++)
1848 for (n = 0; n < 16; n++)
1849 table[i][n] = THP_GET16(gb);
1851 if (!c->has_status) {
1852 /* Initialize the previous sample. */
1853 for (i = 0; i < avctx->channels; i++) {
1854 c->status[i].sample1 = THP_GET16(gb);
1855 c->status[i].sample2 = THP_GET16(gb);
1859 bytestream2_skip(&gb, avctx->channels * 4);
1863 for (ch = 0; ch < avctx->channels; ch++) {
1864 samples = samples_p[ch];
1866 /* Read in every sample for this channel. */
1867 for (i = 0; i < (nb_samples + 13) / 14; i++) {
1868 int byte = bytestream2_get_byteu(&gb);
1869 int index = (byte >> 4) & 7;
1870 unsigned int exp = byte & 0x0F;
1871 int64_t factor1 = table[ch][index * 2];
1872 int64_t factor2 = table[ch][index * 2 + 1];
1874 /* Decode 14 samples. */
1875 for (n = 0; n < 14 && (i * 14 + n < nb_samples); n++) {
1879 sampledat = sign_extend(byte, 4);
1881 byte = bytestream2_get_byteu(&gb);
1882 sampledat = sign_extend(byte >> 4, 4);
1885 sampledat = ((c->status[ch].sample1 * factor1
1886 + c->status[ch].sample2 * factor2) >> 11) + sampledat * (1 << exp);
1887 *samples = av_clip_int16(sampledat);
1888 c->status[ch].sample2 = c->status[ch].sample1;
1889 c->status[ch].sample1 = *samples++;
1895 case AV_CODEC_ID_ADPCM_DTK:
1896 for (channel = 0; channel < avctx->channels; channel++) {
1897 samples = samples_p[channel];
1899 /* Read in every sample for this channel. */
1900 for (i = 0; i < nb_samples / 28; i++) {
1903 bytestream2_skipu(&gb, 1);
1904 header = bytestream2_get_byteu(&gb);
1905 bytestream2_skipu(&gb, 3 - channel);
1907 /* Decode 28 samples. */
1908 for (n = 0; n < 28; n++) {
1909 int32_t sampledat, prev;
1911 switch (header >> 4) {
1913 prev = (c->status[channel].sample1 * 0x3c);
1916 prev = (c->status[channel].sample1 * 0x73) - (c->status[channel].sample2 * 0x34);
1919 prev = (c->status[channel].sample1 * 0x62) - (c->status[channel].sample2 * 0x37);
1925 prev = av_clip_intp2((prev + 0x20) >> 6, 21);
1927 byte = bytestream2_get_byteu(&gb);
1929 sampledat = sign_extend(byte, 4);
1931 sampledat = sign_extend(byte >> 4, 4);
1933 sampledat = ((sampledat * (1 << 12)) >> (header & 0xf)) * (1 << 6) + prev;
1934 *samples++ = av_clip_int16(sampledat >> 6);
1935 c->status[channel].sample2 = c->status[channel].sample1;
1936 c->status[channel].sample1 = sampledat;
1940 bytestream2_seek(&gb, 0, SEEK_SET);
1943 case AV_CODEC_ID_ADPCM_PSX:
1944 for (channel = 0; channel < avctx->channels; channel++) {
1945 samples = samples_p[channel];
1947 /* Read in every sample for this channel. */
1948 for (i = 0; i < nb_samples / 28; i++) {
1949 int filter, shift, flag, byte;
1951 filter = bytestream2_get_byteu(&gb);
1952 shift = filter & 0xf;
1953 filter = filter >> 4;
1954 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table))
1955 return AVERROR_INVALIDDATA;
1956 flag = bytestream2_get_byteu(&gb);
1958 /* Decode 28 samples. */
1959 for (n = 0; n < 28; n++) {
1960 int sample = 0, scale;
1964 scale = sign_extend(byte >> 4, 4);
1966 byte = bytestream2_get_byteu(&gb);
1967 scale = sign_extend(byte, 4);
1970 scale = scale * (1 << 12);
1971 sample = (int)((scale >> shift) + (c->status[channel].sample1 * xa_adpcm_table[filter][0] + c->status[channel].sample2 * xa_adpcm_table[filter][1]) / 64);
1973 *samples++ = av_clip_int16(sample);
1974 c->status[channel].sample2 = c->status[channel].sample1;
1975 c->status[channel].sample1 = sample;
1980 case AV_CODEC_ID_ADPCM_ARGO:
1982 * The format of each block:
1983 * uint8_t left_control;
1984 * uint4_t left_samples[nb_samples];
1985 * ---- and if stereo ----
1986 * uint8_t right_control;
1987 * uint4_t right_samples[nb_samples];
1989 * Format of the control byte:
1990 * MSB [SSSSRDRR] LSB
1991 * S = (Shift Amount - 2)
1995 * Each block relies on the previous two samples of each channel.
1996 * They should be 0 initially.
1998 for (channel = 0; channel < avctx->channels; channel++) {
2001 samples = samples_p[channel];
2002 cs = c->status + channel;
2004 /* Get the control byte and decode the samples, 2 at a time. */
2005 control = bytestream2_get_byteu(&gb);
2006 shift = (control >> 4) + 2;
2008 for (n = 0; n < nb_samples / 2; n++) {
2009 int sample = bytestream2_get_byteu(&gb);
2010 *samples++ = adpcm_argo_expand_nibble(cs, sign_extend(sample >> 4, 4), control, shift);
2011 *samples++ = adpcm_argo_expand_nibble(cs, sign_extend(sample >> 0, 4), control, shift);
2015 case AV_CODEC_ID_ADPCM_ZORK:
2016 if (!c->has_status) {
2017 for (channel = 0; channel < avctx->channels; channel++) {
2018 c->status[channel].predictor = 0;
2019 c->status[channel].step_index = 0;
2023 for (n = 0; n < nb_samples * avctx->channels; n++) {
2024 int v = bytestream2_get_byteu(&gb);
2025 *samples++ = adpcm_zork_expand_nibble(&c->status[n % avctx->channels], v);
2028 case AV_CODEC_ID_ADPCM_IMA_MTF:
2029 for (n = nb_samples / 2; n > 0; n--) {
2030 for (channel = 0; channel < avctx->channels; channel++) {
2031 int v = bytestream2_get_byteu(&gb);
2032 *samples++ = adpcm_ima_mtf_expand_nibble(&c->status[channel], v >> 4);
2033 samples[st] = adpcm_ima_mtf_expand_nibble(&c->status[channel], v & 0x0F);
2035 samples += avctx->channels;
2039 av_assert0(0); // unsupported codec_id should not happen
2042 if (avpkt->size && bytestream2_tell(&gb) == 0) {
2043 av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n");
2044 return AVERROR_INVALIDDATA;
2049 if (avpkt->size < bytestream2_tell(&gb)) {
2050 av_log(avctx, AV_LOG_ERROR, "Overread of %d < %d\n", avpkt->size, bytestream2_tell(&gb));
2054 return bytestream2_tell(&gb);
2057 static void adpcm_flush(AVCodecContext *avctx)
2059 ADPCMDecodeContext *c = avctx->priv_data;
2064 static const enum AVSampleFormat sample_fmts_s16[] = { AV_SAMPLE_FMT_S16,
2065 AV_SAMPLE_FMT_NONE };
2066 static const enum AVSampleFormat sample_fmts_s16p[] = { AV_SAMPLE_FMT_S16P,
2067 AV_SAMPLE_FMT_NONE };
2068 static const enum AVSampleFormat sample_fmts_both[] = { AV_SAMPLE_FMT_S16,
2070 AV_SAMPLE_FMT_NONE };
2072 #define ADPCM_DECODER(id_, sample_fmts_, name_, long_name_) \
2073 AVCodec ff_ ## name_ ## _decoder = { \
2075 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
2076 .type = AVMEDIA_TYPE_AUDIO, \
2078 .priv_data_size = sizeof(ADPCMDecodeContext), \
2079 .init = adpcm_decode_init, \
2080 .decode = adpcm_decode_frame, \
2081 .flush = adpcm_flush, \
2082 .capabilities = AV_CODEC_CAP_DR1, \
2083 .sample_fmts = sample_fmts_, \
2086 /* Note: Do not forget to add new entries to the Makefile as well. */
2087 ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie");
2088 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC");
2089 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AGM, sample_fmts_s16, adpcm_agm, "ADPCM AmuseGraphics Movie");
2090 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AICA, sample_fmts_s16p, adpcm_aica, "ADPCM Yamaha AICA");
2091 ADPCM_DECODER(AV_CODEC_ID_ADPCM_ARGO, sample_fmts_s16p, adpcm_argo, "ADPCM Argonaut Games");
2092 ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology");
2093 ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK");
2094 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts");
2095 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
2096 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1");
2097 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2");
2098 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3");
2099 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
2100 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV");
2101 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC");
2102 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APM, sample_fmts_s16, adpcm_ima_apm, "ADPCM IMA Ubisoft APM");
2103 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_CUNNING, sample_fmts_s16, adpcm_ima_cunning, "ADPCM IMA Cunning Developments");
2104 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DAT4, sample_fmts_s16, adpcm_ima_dat4, "ADPCM IMA Eurocom DAT4");
2105 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
2106 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
2107 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
2108 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
2109 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
2110 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_MTF, sample_fmts_s16, adpcm_ima_mtf, "ADPCM IMA Capcom's MT Framework");
2111 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI");
2112 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime");
2113 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical");
2114 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SSI, sample_fmts_s16, adpcm_ima_ssi, "ADPCM IMA Simon & Schuster Interactive");
2115 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
2116 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ALP, sample_fmts_s16, adpcm_ima_alp, "ADPCM IMA High Voltage Software ALP");
2117 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV");
2118 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood");
2119 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MS, sample_fmts_both, adpcm_ms, "ADPCM Microsoft");
2120 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MTAF, sample_fmts_s16p, adpcm_mtaf, "ADPCM MTAF");
2121 ADPCM_DECODER(AV_CODEC_ID_ADPCM_PSX, sample_fmts_s16p, adpcm_psx, "ADPCM Playstation");
2122 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
2123 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
2124 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
2125 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash");
2126 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP_LE, sample_fmts_s16p, adpcm_thp_le, "ADPCM Nintendo THP (little-endian)");
2127 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo THP");
2128 ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA");
2129 ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha");
2130 ADPCM_DECODER(AV_CODEC_ID_ADPCM_ZORK, sample_fmts_s16, adpcm_zork, "ADPCM Zork");