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)
16 * This file is part of FFmpeg.
18 * FFmpeg is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU Lesser General Public
20 * License as published by the Free Software Foundation; either
21 * version 2.1 of the License, or (at your option) any later version.
23 * FFmpeg is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 * Lesser General Public License for more details.
28 * You should have received a copy of the GNU Lesser General Public
29 * License along with FFmpeg; if not, write to the Free Software
30 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
34 #include "bytestream.h"
36 #include "adpcm_data.h"
42 * Features and limitations:
44 * Reference documents:
45 * http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs
46 * http://www.pcisys.net/~melanson/codecs/simpleaudio.html [dead]
47 * http://www.geocities.com/SiliconValley/8682/aud3.txt [dead]
48 * http://openquicktime.sourceforge.net/
49 * XAnim sources (xa_codec.c) http://xanim.polter.net/
50 * http://www.cs.ucla.edu/~leec/mediabench/applications.html [dead]
51 * SoX source code http://sox.sourceforge.net/
54 * http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html [dead]
55 * vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html [dead]
56 * readstr http://www.geocities.co.jp/Playtown/2004/
59 /* These are for CD-ROM XA ADPCM */
60 static const int xa_adpcm_table[5][2] = {
68 static const int ea_adpcm_table[] = {
76 // padded to zero where table size is less then 16
77 static const int swf_index_tables[4][16] = {
79 /*3*/ { -1, -1, 2, 4 },
80 /*4*/ { -1, -1, -1, -1, 2, 4, 6, 8 },
81 /*5*/ { -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16 }
86 typedef struct ADPCMDecodeContext {
87 ADPCMChannelStatus status[14];
88 int vqa_version; /**< VQA version. Used for ADPCM_IMA_WS */
92 static av_cold int adpcm_decode_init(AVCodecContext * avctx)
94 ADPCMDecodeContext *c = avctx->priv_data;
95 unsigned int min_channels = 1;
96 unsigned int max_channels = 2;
98 switch(avctx->codec->id) {
99 case AV_CODEC_ID_ADPCM_DTK:
100 case AV_CODEC_ID_ADPCM_EA:
103 case AV_CODEC_ID_ADPCM_AFC:
104 case AV_CODEC_ID_ADPCM_EA_R1:
105 case AV_CODEC_ID_ADPCM_EA_R2:
106 case AV_CODEC_ID_ADPCM_EA_R3:
107 case AV_CODEC_ID_ADPCM_EA_XAS:
110 case AV_CODEC_ID_ADPCM_MTAF:
114 case AV_CODEC_ID_ADPCM_PSX:
117 case AV_CODEC_ID_ADPCM_IMA_DAT4:
118 case AV_CODEC_ID_ADPCM_THP:
119 case AV_CODEC_ID_ADPCM_THP_LE:
123 if (avctx->channels < min_channels || avctx->channels > max_channels) {
124 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
125 return AVERROR(EINVAL);
128 switch(avctx->codec->id) {
129 case AV_CODEC_ID_ADPCM_CT:
130 c->status[0].step = c->status[1].step = 511;
132 case AV_CODEC_ID_ADPCM_IMA_WAV:
133 if (avctx->bits_per_coded_sample < 2 || avctx->bits_per_coded_sample > 5)
134 return AVERROR_INVALIDDATA;
136 case AV_CODEC_ID_ADPCM_IMA_APC:
137 if (avctx->extradata && avctx->extradata_size >= 8) {
138 c->status[0].predictor = AV_RL32(avctx->extradata);
139 c->status[1].predictor = AV_RL32(avctx->extradata + 4);
142 case AV_CODEC_ID_ADPCM_IMA_WS:
143 if (avctx->extradata && avctx->extradata_size >= 2)
144 c->vqa_version = AV_RL16(avctx->extradata);
150 switch(avctx->codec->id) {
151 case AV_CODEC_ID_ADPCM_AICA:
152 case AV_CODEC_ID_ADPCM_IMA_DAT4:
153 case AV_CODEC_ID_ADPCM_IMA_QT:
154 case AV_CODEC_ID_ADPCM_IMA_WAV:
155 case AV_CODEC_ID_ADPCM_4XM:
156 case AV_CODEC_ID_ADPCM_XA:
157 case AV_CODEC_ID_ADPCM_EA_R1:
158 case AV_CODEC_ID_ADPCM_EA_R2:
159 case AV_CODEC_ID_ADPCM_EA_R3:
160 case AV_CODEC_ID_ADPCM_EA_XAS:
161 case AV_CODEC_ID_ADPCM_THP:
162 case AV_CODEC_ID_ADPCM_THP_LE:
163 case AV_CODEC_ID_ADPCM_AFC:
164 case AV_CODEC_ID_ADPCM_DTK:
165 case AV_CODEC_ID_ADPCM_PSX:
166 case AV_CODEC_ID_ADPCM_MTAF:
167 avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
169 case AV_CODEC_ID_ADPCM_IMA_WS:
170 avctx->sample_fmt = c->vqa_version == 3 ? AV_SAMPLE_FMT_S16P :
174 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
180 static inline int16_t adpcm_ima_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int shift)
184 int sign, delta, diff, step;
186 step = ff_adpcm_step_table[c->step_index];
187 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
188 step_index = av_clip(step_index, 0, 88);
192 /* perform direct multiplication instead of series of jumps proposed by
193 * the reference ADPCM implementation since modern CPUs can do the mults
195 diff = ((2 * delta + 1) * step) >> shift;
196 predictor = c->predictor;
197 if (sign) predictor -= diff;
198 else predictor += diff;
200 c->predictor = av_clip_int16(predictor);
201 c->step_index = step_index;
203 return (int16_t)c->predictor;
206 static inline int16_t adpcm_ima_wav_expand_nibble(ADPCMChannelStatus *c, GetBitContext *gb, int bps)
208 int nibble, step_index, predictor, sign, delta, diff, step, shift;
211 nibble = get_bits_le(gb, bps),
212 step = ff_adpcm_step_table[c->step_index];
213 step_index = c->step_index + ff_adpcm_index_tables[bps - 2][nibble];
214 step_index = av_clip(step_index, 0, 88);
216 sign = nibble & (1 << shift);
217 delta = av_mod_uintp2(nibble, shift);
218 diff = ((2 * delta + 1) * step) >> shift;
219 predictor = c->predictor;
220 if (sign) predictor -= diff;
221 else predictor += diff;
223 c->predictor = av_clip_int16(predictor);
224 c->step_index = step_index;
226 return (int16_t)c->predictor;
229 static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble, int shift)
235 step = ff_adpcm_step_table[c->step_index];
236 step_index = c->step_index + ff_adpcm_index_table[nibble];
237 step_index = av_clip(step_index, 0, 88);
240 if (nibble & 4) diff += step;
241 if (nibble & 2) diff += step >> 1;
242 if (nibble & 1) diff += step >> 2;
245 predictor = c->predictor - diff;
247 predictor = c->predictor + diff;
249 c->predictor = av_clip_int16(predictor);
250 c->step_index = step_index;
255 static inline int16_t adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble)
259 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
260 predictor += ((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
262 c->sample2 = c->sample1;
263 c->sample1 = av_clip_int16(predictor);
264 c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8;
265 if (c->idelta < 16) c->idelta = 16;
266 if (c->idelta > INT_MAX/768) {
267 av_log(NULL, AV_LOG_WARNING, "idelta overflow\n");
268 c->idelta = INT_MAX/768;
274 static inline int16_t adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble)
276 int step_index, predictor, sign, delta, diff, step;
278 step = ff_adpcm_oki_step_table[c->step_index];
279 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
280 step_index = av_clip(step_index, 0, 48);
284 diff = ((2 * delta + 1) * step) >> 3;
285 predictor = c->predictor;
286 if (sign) predictor -= diff;
287 else predictor += diff;
289 c->predictor = av_clip_intp2(predictor, 11);
290 c->step_index = step_index;
292 return c->predictor << 4;
295 static inline int16_t adpcm_ct_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
297 int sign, delta, diff;
302 /* perform direct multiplication instead of series of jumps proposed by
303 * the reference ADPCM implementation since modern CPUs can do the mults
305 diff = ((2 * delta + 1) * c->step) >> 3;
306 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
307 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
308 c->predictor = av_clip_int16(c->predictor);
309 /* calculate new step and clamp it to range 511..32767 */
310 new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
311 c->step = av_clip(new_step, 511, 32767);
313 return (int16_t)c->predictor;
316 static inline int16_t adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int size, int shift)
318 int sign, delta, diff;
320 sign = nibble & (1<<(size-1));
321 delta = nibble & ((1<<(size-1))-1);
322 diff = delta << (7 + c->step + shift);
325 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
327 /* calculate new step */
328 if (delta >= (2*size - 3) && c->step < 3)
330 else if (delta == 0 && c->step > 0)
333 return (int16_t) c->predictor;
336 static inline int16_t adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
343 c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
344 c->predictor = av_clip_int16(c->predictor);
345 c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
346 c->step = av_clip(c->step, 127, 24576);
350 static inline int16_t adpcm_mtaf_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
352 c->predictor += ff_adpcm_mtaf_stepsize[c->step][nibble];
353 c->predictor = av_clip_int16(c->predictor);
354 c->step += ff_adpcm_index_table[nibble];
355 c->step = av_clip_uintp2(c->step, 5);
359 static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1,
360 const uint8_t *in, ADPCMChannelStatus *left,
361 ADPCMChannelStatus *right, int channels, int sample_offset)
364 int shift,filter,f0,f1;
368 out0 += sample_offset;
372 out1 += sample_offset;
375 shift = 12 - (in[4+i*2] & 15);
376 filter = in[4+i*2] >> 4;
377 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
378 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
381 f0 = xa_adpcm_table[filter][0];
382 f1 = xa_adpcm_table[filter][1];
390 t = sign_extend(d, 4);
391 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
393 s_1 = av_clip_int16(s);
400 s_1 = right->sample1;
401 s_2 = right->sample2;
404 shift = 12 - (in[5+i*2] & 15);
405 filter = in[5+i*2] >> 4;
406 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
407 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
411 f0 = xa_adpcm_table[filter][0];
412 f1 = xa_adpcm_table[filter][1];
417 t = sign_extend(d >> 4, 4);
418 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
420 s_1 = av_clip_int16(s);
425 right->sample1 = s_1;
426 right->sample2 = s_2;
432 out0 += 28 * (3 - channels);
433 out1 += 28 * (3 - channels);
439 static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples)
441 ADPCMDecodeContext *c = avctx->priv_data;
444 int k0, signmask, nb_bits, count;
445 int size = buf_size*8;
448 init_get_bits(&gb, buf, size);
450 //read bits & initial values
451 nb_bits = get_bits(&gb, 2)+2;
452 table = swf_index_tables[nb_bits-2];
453 k0 = 1 << (nb_bits-2);
454 signmask = 1 << (nb_bits-1);
456 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
457 for (i = 0; i < avctx->channels; i++) {
458 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
459 c->status[i].step_index = get_bits(&gb, 6);
462 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
465 for (i = 0; i < avctx->channels; i++) {
466 // similar to IMA adpcm
467 int delta = get_bits(&gb, nb_bits);
468 int step = ff_adpcm_step_table[c->status[i].step_index];
469 int vpdiff = 0; // vpdiff = (delta+0.5)*step/4
480 if (delta & signmask)
481 c->status[i].predictor -= vpdiff;
483 c->status[i].predictor += vpdiff;
485 c->status[i].step_index += table[delta & (~signmask)];
487 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
488 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
490 *samples++ = c->status[i].predictor;
497 * Get the number of samples that will be decoded from the packet.
498 * In one case, this is actually the maximum number of samples possible to
499 * decode with the given buf_size.
501 * @param[out] coded_samples set to the number of samples as coded in the
502 * packet, or 0 if the codec does not encode the
503 * number of samples in each frame.
504 * @param[out] approx_nb_samples set to non-zero if the number of samples
505 * returned is an approximation.
507 static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
508 int buf_size, int *coded_samples, int *approx_nb_samples)
510 ADPCMDecodeContext *s = avctx->priv_data;
512 int ch = avctx->channels;
513 int has_coded_samples = 0;
517 *approx_nb_samples = 0;
522 switch (avctx->codec->id) {
523 /* constant, only check buf_size */
524 case AV_CODEC_ID_ADPCM_EA_XAS:
525 if (buf_size < 76 * ch)
529 case AV_CODEC_ID_ADPCM_IMA_QT:
530 if (buf_size < 34 * ch)
534 /* simple 4-bit adpcm */
535 case AV_CODEC_ID_ADPCM_CT:
536 case AV_CODEC_ID_ADPCM_IMA_APC:
537 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
538 case AV_CODEC_ID_ADPCM_IMA_OKI:
539 case AV_CODEC_ID_ADPCM_IMA_WS:
540 case AV_CODEC_ID_ADPCM_YAMAHA:
541 case AV_CODEC_ID_ADPCM_AICA:
542 nb_samples = buf_size * 2 / ch;
548 /* simple 4-bit adpcm, with header */
550 switch (avctx->codec->id) {
551 case AV_CODEC_ID_ADPCM_4XM:
552 case AV_CODEC_ID_ADPCM_IMA_DAT4:
553 case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
554 case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break;
555 case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break;
558 return (buf_size - header_size) * 2 / ch;
560 /* more complex formats */
561 switch (avctx->codec->id) {
562 case AV_CODEC_ID_ADPCM_EA:
563 has_coded_samples = 1;
564 *coded_samples = bytestream2_get_le32(gb);
565 *coded_samples -= *coded_samples % 28;
566 nb_samples = (buf_size - 12) / 30 * 28;
568 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
569 has_coded_samples = 1;
570 *coded_samples = bytestream2_get_le32(gb);
571 nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch;
573 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
574 nb_samples = (buf_size - ch) / ch * 2;
576 case AV_CODEC_ID_ADPCM_EA_R1:
577 case AV_CODEC_ID_ADPCM_EA_R2:
578 case AV_CODEC_ID_ADPCM_EA_R3:
579 /* maximum number of samples */
580 /* has internal offsets and a per-frame switch to signal raw 16-bit */
581 has_coded_samples = 1;
582 switch (avctx->codec->id) {
583 case AV_CODEC_ID_ADPCM_EA_R1:
584 header_size = 4 + 9 * ch;
585 *coded_samples = bytestream2_get_le32(gb);
587 case AV_CODEC_ID_ADPCM_EA_R2:
588 header_size = 4 + 5 * ch;
589 *coded_samples = bytestream2_get_le32(gb);
591 case AV_CODEC_ID_ADPCM_EA_R3:
592 header_size = 4 + 5 * ch;
593 *coded_samples = bytestream2_get_be32(gb);
596 *coded_samples -= *coded_samples % 28;
597 nb_samples = (buf_size - header_size) * 2 / ch;
598 nb_samples -= nb_samples % 28;
599 *approx_nb_samples = 1;
601 case AV_CODEC_ID_ADPCM_IMA_DK3:
602 if (avctx->block_align > 0)
603 buf_size = FFMIN(buf_size, avctx->block_align);
604 nb_samples = ((buf_size - 16) * 2 / 3 * 4) / ch;
606 case AV_CODEC_ID_ADPCM_IMA_DK4:
607 if (avctx->block_align > 0)
608 buf_size = FFMIN(buf_size, avctx->block_align);
609 if (buf_size < 4 * ch)
610 return AVERROR_INVALIDDATA;
611 nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch;
613 case AV_CODEC_ID_ADPCM_IMA_RAD:
614 if (avctx->block_align > 0)
615 buf_size = FFMIN(buf_size, avctx->block_align);
616 nb_samples = (buf_size - 4 * ch) * 2 / ch;
618 case AV_CODEC_ID_ADPCM_IMA_WAV:
620 int bsize = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
621 int bsamples = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
622 if (avctx->block_align > 0)
623 buf_size = FFMIN(buf_size, avctx->block_align);
624 if (buf_size < 4 * ch)
625 return AVERROR_INVALIDDATA;
626 nb_samples = 1 + (buf_size - 4 * ch) / (bsize * ch) * bsamples;
629 case AV_CODEC_ID_ADPCM_MS:
630 if (avctx->block_align > 0)
631 buf_size = FFMIN(buf_size, avctx->block_align);
632 nb_samples = (buf_size - 6 * ch) * 2 / ch;
634 case AV_CODEC_ID_ADPCM_MTAF:
635 if (avctx->block_align > 0)
636 buf_size = FFMIN(buf_size, avctx->block_align);
637 nb_samples = (buf_size - 16 * (ch / 2)) * 2 / ch;
639 case AV_CODEC_ID_ADPCM_SBPRO_2:
640 case AV_CODEC_ID_ADPCM_SBPRO_3:
641 case AV_CODEC_ID_ADPCM_SBPRO_4:
643 int samples_per_byte;
644 switch (avctx->codec->id) {
645 case AV_CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break;
646 case AV_CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break;
647 case AV_CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break;
649 if (!s->status[0].step_index) {
651 return AVERROR_INVALIDDATA;
655 nb_samples += buf_size * samples_per_byte / ch;
658 case AV_CODEC_ID_ADPCM_SWF:
660 int buf_bits = buf_size * 8 - 2;
661 int nbits = (bytestream2_get_byte(gb) >> 6) + 2;
662 int block_hdr_size = 22 * ch;
663 int block_size = block_hdr_size + nbits * ch * 4095;
664 int nblocks = buf_bits / block_size;
665 int bits_left = buf_bits - nblocks * block_size;
666 nb_samples = nblocks * 4096;
667 if (bits_left >= block_hdr_size)
668 nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch);
671 case AV_CODEC_ID_ADPCM_THP:
672 case AV_CODEC_ID_ADPCM_THP_LE:
673 if (avctx->extradata) {
674 nb_samples = buf_size * 14 / (8 * ch);
677 has_coded_samples = 1;
678 bytestream2_skip(gb, 4); // channel size
679 *coded_samples = (avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE) ?
680 bytestream2_get_le32(gb) :
681 bytestream2_get_be32(gb);
682 buf_size -= 8 + 36 * ch;
684 nb_samples = buf_size / 8 * 14;
685 if (buf_size % 8 > 1)
686 nb_samples += (buf_size % 8 - 1) * 2;
687 *approx_nb_samples = 1;
689 case AV_CODEC_ID_ADPCM_AFC:
690 nb_samples = buf_size / (9 * ch) * 16;
692 case AV_CODEC_ID_ADPCM_XA:
693 nb_samples = (buf_size / 128) * 224 / ch;
695 case AV_CODEC_ID_ADPCM_DTK:
696 case AV_CODEC_ID_ADPCM_PSX:
697 nb_samples = buf_size / (16 * ch) * 28;
701 /* validate coded sample count */
702 if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
703 return AVERROR_INVALIDDATA;
708 static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
709 int *got_frame_ptr, AVPacket *avpkt)
711 AVFrame *frame = data;
712 const uint8_t *buf = avpkt->data;
713 int buf_size = avpkt->size;
714 ADPCMDecodeContext *c = avctx->priv_data;
715 ADPCMChannelStatus *cs;
716 int n, m, channel, i;
721 int nb_samples, coded_samples, approx_nb_samples, ret;
724 bytestream2_init(&gb, buf, buf_size);
725 nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples, &approx_nb_samples);
726 if (nb_samples <= 0) {
727 av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
728 return AVERROR_INVALIDDATA;
731 /* get output buffer */
732 frame->nb_samples = nb_samples;
733 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
735 samples = (int16_t *)frame->data[0];
736 samples_p = (int16_t **)frame->extended_data;
738 /* use coded_samples when applicable */
739 /* it is always <= nb_samples, so the output buffer will be large enough */
741 if (!approx_nb_samples && coded_samples != nb_samples)
742 av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
743 frame->nb_samples = nb_samples = coded_samples;
746 st = avctx->channels == 2 ? 1 : 0;
748 switch(avctx->codec->id) {
749 case AV_CODEC_ID_ADPCM_IMA_QT:
750 /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
751 Channel data is interleaved per-chunk. */
752 for (channel = 0; channel < avctx->channels; channel++) {
755 cs = &(c->status[channel]);
756 /* (pppppp) (piiiiiii) */
758 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
759 predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
760 step_index = predictor & 0x7F;
763 if (cs->step_index == step_index) {
764 int diff = predictor - cs->predictor;
771 cs->step_index = step_index;
772 cs->predictor = predictor;
775 if (cs->step_index > 88u){
776 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
777 channel, cs->step_index);
778 return AVERROR_INVALIDDATA;
781 samples = samples_p[channel];
783 for (m = 0; m < 64; m += 2) {
784 int byte = bytestream2_get_byteu(&gb);
785 samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F, 3);
786 samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 , 3);
790 case AV_CODEC_ID_ADPCM_IMA_WAV:
791 for(i=0; i<avctx->channels; i++){
792 cs = &(c->status[i]);
793 cs->predictor = samples_p[i][0] = sign_extend(bytestream2_get_le16u(&gb), 16);
795 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
796 if (cs->step_index > 88u){
797 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
799 return AVERROR_INVALIDDATA;
803 if (avctx->bits_per_coded_sample != 4) {
804 int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
805 int block_size = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
806 uint8_t temp[20 + AV_INPUT_BUFFER_PADDING_SIZE] = { 0 };
809 for (n = 0; n < (nb_samples - 1) / samples_per_block; n++) {
810 for (i = 0; i < avctx->channels; i++) {
814 samples = &samples_p[i][1 + n * samples_per_block];
815 for (j = 0; j < block_size; j++) {
816 temp[j] = buf[4 * avctx->channels + block_size * n * avctx->channels +
817 (j % 4) + (j / 4) * (avctx->channels * 4) + i * 4];
819 ret = init_get_bits8(&g, (const uint8_t *)&temp, block_size);
822 for (m = 0; m < samples_per_block; m++) {
823 samples[m] = adpcm_ima_wav_expand_nibble(cs, &g,
824 avctx->bits_per_coded_sample);
828 bytestream2_skip(&gb, avctx->block_align - avctx->channels * 4);
830 for (n = 0; n < (nb_samples - 1) / 8; n++) {
831 for (i = 0; i < avctx->channels; i++) {
833 samples = &samples_p[i][1 + n * 8];
834 for (m = 0; m < 8; m += 2) {
835 int v = bytestream2_get_byteu(&gb);
836 samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
837 samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
843 case AV_CODEC_ID_ADPCM_4XM:
844 for (i = 0; i < avctx->channels; i++)
845 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
847 for (i = 0; i < avctx->channels; i++) {
848 c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
849 if (c->status[i].step_index > 88u) {
850 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
851 i, c->status[i].step_index);
852 return AVERROR_INVALIDDATA;
856 for (i = 0; i < avctx->channels; i++) {
857 samples = (int16_t *)frame->data[i];
859 for (n = nb_samples >> 1; n > 0; n--) {
860 int v = bytestream2_get_byteu(&gb);
861 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
862 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
866 case AV_CODEC_ID_ADPCM_MS:
870 block_predictor = bytestream2_get_byteu(&gb);
871 if (block_predictor > 6) {
872 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n",
874 return AVERROR_INVALIDDATA;
876 c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
877 c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
879 block_predictor = bytestream2_get_byteu(&gb);
880 if (block_predictor > 6) {
881 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n",
883 return AVERROR_INVALIDDATA;
885 c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
886 c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
888 c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
890 c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
893 c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
894 if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
895 c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
896 if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
898 *samples++ = c->status[0].sample2;
899 if (st) *samples++ = c->status[1].sample2;
900 *samples++ = c->status[0].sample1;
901 if (st) *samples++ = c->status[1].sample1;
902 for(n = (nb_samples - 2) >> (1 - st); n > 0; n--) {
903 int byte = bytestream2_get_byteu(&gb);
904 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 );
905 *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F);
909 case AV_CODEC_ID_ADPCM_MTAF:
910 for (channel = 0; channel < avctx->channels; channel+=2) {
911 bytestream2_skipu(&gb, 4);
912 c->status[channel ].step = bytestream2_get_le16u(&gb) & 0x1f;
913 c->status[channel + 1].step = bytestream2_get_le16u(&gb) & 0x1f;
914 c->status[channel ].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
915 bytestream2_skipu(&gb, 2);
916 c->status[channel + 1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
917 bytestream2_skipu(&gb, 2);
918 for (n = 0; n < nb_samples; n+=2) {
919 int v = bytestream2_get_byteu(&gb);
920 samples_p[channel][n ] = adpcm_mtaf_expand_nibble(&c->status[channel], v & 0x0F);
921 samples_p[channel][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel], v >> 4 );
923 for (n = 0; n < nb_samples; n+=2) {
924 int v = bytestream2_get_byteu(&gb);
925 samples_p[channel + 1][n ] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v & 0x0F);
926 samples_p[channel + 1][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v >> 4 );
930 case AV_CODEC_ID_ADPCM_IMA_DK4:
931 for (channel = 0; channel < avctx->channels; channel++) {
932 cs = &c->status[channel];
933 cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16);
934 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
935 if (cs->step_index > 88u){
936 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
937 channel, cs->step_index);
938 return AVERROR_INVALIDDATA;
941 for (n = (nb_samples - 1) >> (1 - st); n > 0; n--) {
942 int v = bytestream2_get_byteu(&gb);
943 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
944 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
947 case AV_CODEC_ID_ADPCM_IMA_DK3:
951 int decode_top_nibble_next = 0;
953 const int16_t *samples_end = samples + avctx->channels * nb_samples;
955 bytestream2_skipu(&gb, 10);
956 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
957 c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
958 c->status[0].step_index = bytestream2_get_byteu(&gb);
959 c->status[1].step_index = bytestream2_get_byteu(&gb);
960 if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){
961 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n",
962 c->status[0].step_index, c->status[1].step_index);
963 return AVERROR_INVALIDDATA;
965 /* sign extend the predictors */
966 diff_channel = c->status[1].predictor;
968 /* DK3 ADPCM support macro */
969 #define DK3_GET_NEXT_NIBBLE() \
970 if (decode_top_nibble_next) { \
971 nibble = last_byte >> 4; \
972 decode_top_nibble_next = 0; \
974 last_byte = bytestream2_get_byteu(&gb); \
975 nibble = last_byte & 0x0F; \
976 decode_top_nibble_next = 1; \
979 while (samples < samples_end) {
981 /* for this algorithm, c->status[0] is the sum channel and
982 * c->status[1] is the diff channel */
984 /* process the first predictor of the sum channel */
985 DK3_GET_NEXT_NIBBLE();
986 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
988 /* process the diff channel predictor */
989 DK3_GET_NEXT_NIBBLE();
990 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
992 /* process the first pair of stereo PCM samples */
993 diff_channel = (diff_channel + c->status[1].predictor) / 2;
994 *samples++ = c->status[0].predictor + c->status[1].predictor;
995 *samples++ = c->status[0].predictor - c->status[1].predictor;
997 /* process the second predictor of the sum channel */
998 DK3_GET_NEXT_NIBBLE();
999 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1001 /* process the second pair of stereo PCM samples */
1002 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1003 *samples++ = c->status[0].predictor + c->status[1].predictor;
1004 *samples++ = c->status[0].predictor - c->status[1].predictor;
1007 if ((bytestream2_tell(&gb) & 1))
1008 bytestream2_skip(&gb, 1);
1011 case AV_CODEC_ID_ADPCM_IMA_ISS:
1012 for (channel = 0; channel < avctx->channels; channel++) {
1013 cs = &c->status[channel];
1014 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1015 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1016 if (cs->step_index > 88u){
1017 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1018 channel, cs->step_index);
1019 return AVERROR_INVALIDDATA;
1023 for (n = nb_samples >> (1 - st); n > 0; n--) {
1025 int v = bytestream2_get_byteu(&gb);
1026 /* nibbles are swapped for mono */
1034 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
1035 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
1038 case AV_CODEC_ID_ADPCM_IMA_DAT4:
1039 for (channel = 0; channel < avctx->channels; channel++) {
1040 cs = &c->status[channel];
1041 samples = samples_p[channel];
1042 bytestream2_skip(&gb, 4);
1043 for (n = 0; n < nb_samples; n += 2) {
1044 int v = bytestream2_get_byteu(&gb);
1045 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
1046 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
1050 case AV_CODEC_ID_ADPCM_IMA_APC:
1051 while (bytestream2_get_bytes_left(&gb) > 0) {
1052 int v = bytestream2_get_byteu(&gb);
1053 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
1054 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
1057 case AV_CODEC_ID_ADPCM_IMA_OKI:
1058 while (bytestream2_get_bytes_left(&gb) > 0) {
1059 int v = bytestream2_get_byteu(&gb);
1060 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 );
1061 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F);
1064 case AV_CODEC_ID_ADPCM_IMA_RAD:
1065 for (channel = 0; channel < avctx->channels; channel++) {
1066 cs = &c->status[channel];
1067 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1068 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1069 if (cs->step_index > 88u){
1070 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1071 channel, cs->step_index);
1072 return AVERROR_INVALIDDATA;
1075 for (n = 0; n < nb_samples / 2; n++) {
1078 byte[0] = bytestream2_get_byteu(&gb);
1080 byte[1] = bytestream2_get_byteu(&gb);
1081 for(channel = 0; channel < avctx->channels; channel++) {
1082 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] & 0x0F, 3);
1084 for(channel = 0; channel < avctx->channels; channel++) {
1085 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] >> 4 , 3);
1089 case AV_CODEC_ID_ADPCM_IMA_WS:
1090 if (c->vqa_version == 3) {
1091 for (channel = 0; channel < avctx->channels; channel++) {
1092 int16_t *smp = samples_p[channel];
1094 for (n = nb_samples / 2; n > 0; n--) {
1095 int v = bytestream2_get_byteu(&gb);
1096 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1097 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1101 for (n = nb_samples / 2; n > 0; n--) {
1102 for (channel = 0; channel < avctx->channels; channel++) {
1103 int v = bytestream2_get_byteu(&gb);
1104 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1105 samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1107 samples += avctx->channels;
1110 bytestream2_seek(&gb, 0, SEEK_END);
1112 case AV_CODEC_ID_ADPCM_XA:
1114 int16_t *out0 = samples_p[0];
1115 int16_t *out1 = samples_p[1];
1116 int samples_per_block = 28 * (3 - avctx->channels) * 4;
1117 int sample_offset = 0;
1118 int bytes_remaining;
1119 while (bytestream2_get_bytes_left(&gb) >= 128) {
1120 if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb),
1121 &c->status[0], &c->status[1],
1122 avctx->channels, sample_offset)) < 0)
1124 bytestream2_skipu(&gb, 128);
1125 sample_offset += samples_per_block;
1127 /* Less than a full block of data left, e.g. when reading from
1128 * 2324 byte per sector XA; the remainder is padding */
1129 bytes_remaining = bytestream2_get_bytes_left(&gb);
1130 if (bytes_remaining > 0) {
1131 bytestream2_skip(&gb, bytes_remaining);
1135 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
1136 for (i=0; i<=st; i++) {
1137 c->status[i].step_index = bytestream2_get_le32u(&gb);
1138 if (c->status[i].step_index > 88u) {
1139 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1140 i, c->status[i].step_index);
1141 return AVERROR_INVALIDDATA;
1144 for (i=0; i<=st; i++)
1145 c->status[i].predictor = bytestream2_get_le32u(&gb);
1147 for (n = nb_samples >> (1 - st); n > 0; n--) {
1148 int byte = bytestream2_get_byteu(&gb);
1149 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3);
1150 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3);
1153 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1154 for (n = nb_samples >> (1 - st); n > 0; n--) {
1155 int byte = bytestream2_get_byteu(&gb);
1156 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6);
1157 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6);
1160 case AV_CODEC_ID_ADPCM_EA:
1162 int previous_left_sample, previous_right_sample;
1163 int current_left_sample, current_right_sample;
1164 int next_left_sample, next_right_sample;
1165 int coeff1l, coeff2l, coeff1r, coeff2r;
1166 int shift_left, shift_right;
1168 /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
1169 each coding 28 stereo samples. */
1171 if(avctx->channels != 2)
1172 return AVERROR_INVALIDDATA;
1174 current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1175 previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1176 current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1177 previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1179 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1180 int byte = bytestream2_get_byteu(&gb);
1181 coeff1l = ea_adpcm_table[ byte >> 4 ];
1182 coeff2l = ea_adpcm_table[(byte >> 4 ) + 4];
1183 coeff1r = ea_adpcm_table[ byte & 0x0F];
1184 coeff2r = ea_adpcm_table[(byte & 0x0F) + 4];
1186 byte = bytestream2_get_byteu(&gb);
1187 shift_left = 20 - (byte >> 4);
1188 shift_right = 20 - (byte & 0x0F);
1190 for (count2 = 0; count2 < 28; count2++) {
1191 byte = bytestream2_get_byteu(&gb);
1192 next_left_sample = sign_extend(byte >> 4, 4) << shift_left;
1193 next_right_sample = sign_extend(byte, 4) << shift_right;
1195 next_left_sample = (next_left_sample +
1196 (current_left_sample * coeff1l) +
1197 (previous_left_sample * coeff2l) + 0x80) >> 8;
1198 next_right_sample = (next_right_sample +
1199 (current_right_sample * coeff1r) +
1200 (previous_right_sample * coeff2r) + 0x80) >> 8;
1202 previous_left_sample = current_left_sample;
1203 current_left_sample = av_clip_int16(next_left_sample);
1204 previous_right_sample = current_right_sample;
1205 current_right_sample = av_clip_int16(next_right_sample);
1206 *samples++ = current_left_sample;
1207 *samples++ = current_right_sample;
1211 bytestream2_skip(&gb, 2); // Skip terminating 0x0000
1215 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
1217 int coeff[2][2], shift[2];
1219 for(channel = 0; channel < avctx->channels; channel++) {
1220 int byte = bytestream2_get_byteu(&gb);
1222 coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i];
1223 shift[channel] = 20 - (byte & 0x0F);
1225 for (count1 = 0; count1 < nb_samples / 2; count1++) {
1228 byte[0] = bytestream2_get_byteu(&gb);
1229 if (st) byte[1] = bytestream2_get_byteu(&gb);
1230 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1231 for(channel = 0; channel < avctx->channels; channel++) {
1232 int sample = sign_extend(byte[channel] >> i, 4) << shift[channel];
1234 c->status[channel].sample1 * coeff[channel][0] +
1235 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1236 c->status[channel].sample2 = c->status[channel].sample1;
1237 c->status[channel].sample1 = av_clip_int16(sample);
1238 *samples++ = c->status[channel].sample1;
1242 bytestream2_seek(&gb, 0, SEEK_END);
1245 case AV_CODEC_ID_ADPCM_EA_R1:
1246 case AV_CODEC_ID_ADPCM_EA_R2:
1247 case AV_CODEC_ID_ADPCM_EA_R3: {
1248 /* channel numbering
1250 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1251 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1252 const int big_endian = avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R3;
1253 int previous_sample, current_sample, next_sample;
1256 unsigned int channel;
1261 for (channel=0; channel<avctx->channels; channel++)
1262 offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) :
1263 bytestream2_get_le32(&gb)) +
1264 (avctx->channels + 1) * 4;
1266 for (channel=0; channel<avctx->channels; channel++) {
1267 bytestream2_seek(&gb, offsets[channel], SEEK_SET);
1268 samplesC = samples_p[channel];
1270 if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) {
1271 current_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1272 previous_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1274 current_sample = c->status[channel].predictor;
1275 previous_sample = c->status[channel].prev_sample;
1278 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1279 int byte = bytestream2_get_byte(&gb);
1280 if (byte == 0xEE) { /* only seen in R2 and R3 */
1281 current_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1282 previous_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1284 for (count2=0; count2<28; count2++)
1285 *samplesC++ = sign_extend(bytestream2_get_be16(&gb), 16);
1287 coeff1 = ea_adpcm_table[ byte >> 4 ];
1288 coeff2 = ea_adpcm_table[(byte >> 4) + 4];
1289 shift = 20 - (byte & 0x0F);
1291 for (count2=0; count2<28; count2++) {
1293 next_sample = sign_extend(byte, 4) << shift;
1295 byte = bytestream2_get_byte(&gb);
1296 next_sample = sign_extend(byte >> 4, 4) << shift;
1299 next_sample += (current_sample * coeff1) +
1300 (previous_sample * coeff2);
1301 next_sample = av_clip_int16(next_sample >> 8);
1303 previous_sample = current_sample;
1304 current_sample = next_sample;
1305 *samplesC++ = current_sample;
1311 } else if (count != count1) {
1312 av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
1313 count = FFMAX(count, count1);
1316 if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) {
1317 c->status[channel].predictor = current_sample;
1318 c->status[channel].prev_sample = previous_sample;
1322 frame->nb_samples = count * 28;
1323 bytestream2_seek(&gb, 0, SEEK_END);
1326 case AV_CODEC_ID_ADPCM_EA_XAS:
1327 for (channel=0; channel<avctx->channels; channel++) {
1328 int coeff[2][4], shift[4];
1329 int16_t *s = samples_p[channel];
1330 for (n = 0; n < 4; n++, s += 32) {
1331 int val = sign_extend(bytestream2_get_le16u(&gb), 16);
1333 coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i];
1336 val = sign_extend(bytestream2_get_le16u(&gb), 16);
1337 shift[n] = 20 - (val & 0x0F);
1341 for (m=2; m<32; m+=2) {
1342 s = &samples_p[channel][m];
1343 for (n = 0; n < 4; n++, s += 32) {
1345 int byte = bytestream2_get_byteu(&gb);
1347 level = sign_extend(byte >> 4, 4) << shift[n];
1348 pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n];
1349 s[0] = av_clip_int16((level + pred + 0x80) >> 8);
1351 level = sign_extend(byte, 4) << shift[n];
1352 pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n];
1353 s[1] = av_clip_int16((level + pred + 0x80) >> 8);
1358 case AV_CODEC_ID_ADPCM_IMA_AMV:
1359 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1360 c->status[0].step_index = bytestream2_get_byteu(&gb);
1361 bytestream2_skipu(&gb, 5);
1362 if (c->status[0].step_index > 88u) {
1363 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1364 c->status[0].step_index);
1365 return AVERROR_INVALIDDATA;
1368 for (n = nb_samples >> (1 - st); n > 0; n--) {
1369 int v = bytestream2_get_byteu(&gb);
1371 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3);
1372 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3);
1375 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1376 for (i = 0; i < avctx->channels; i++) {
1377 c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
1378 c->status[i].step_index = bytestream2_get_byteu(&gb);
1379 bytestream2_skipu(&gb, 1);
1380 if (c->status[i].step_index > 88u) {
1381 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1382 c->status[i].step_index);
1383 return AVERROR_INVALIDDATA;
1387 for (n = nb_samples >> (1 - st); n > 0; n--) {
1388 int v = bytestream2_get_byteu(&gb);
1390 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4, 3);
1391 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf, 3);
1394 case AV_CODEC_ID_ADPCM_CT:
1395 for (n = nb_samples >> (1 - st); n > 0; n--) {
1396 int v = bytestream2_get_byteu(&gb);
1397 *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
1398 *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
1401 case AV_CODEC_ID_ADPCM_SBPRO_4:
1402 case AV_CODEC_ID_ADPCM_SBPRO_3:
1403 case AV_CODEC_ID_ADPCM_SBPRO_2:
1404 if (!c->status[0].step_index) {
1405 /* the first byte is a raw sample */
1406 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1408 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1409 c->status[0].step_index = 1;
1412 if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) {
1413 for (n = nb_samples >> (1 - st); n > 0; n--) {
1414 int byte = bytestream2_get_byteu(&gb);
1415 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1417 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1420 } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) {
1421 for (n = (nb_samples<<st) / 3; n > 0; n--) {
1422 int byte = bytestream2_get_byteu(&gb);
1423 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1425 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1426 (byte >> 2) & 0x07, 3, 0);
1427 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1431 for (n = nb_samples >> (2 - st); n > 0; n--) {
1432 int byte = bytestream2_get_byteu(&gb);
1433 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1435 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1436 (byte >> 4) & 0x03, 2, 2);
1437 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1438 (byte >> 2) & 0x03, 2, 2);
1439 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1444 case AV_CODEC_ID_ADPCM_SWF:
1445 adpcm_swf_decode(avctx, buf, buf_size, samples);
1446 bytestream2_seek(&gb, 0, SEEK_END);
1448 case AV_CODEC_ID_ADPCM_YAMAHA:
1449 for (n = nb_samples >> (1 - st); n > 0; n--) {
1450 int v = bytestream2_get_byteu(&gb);
1451 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
1452 *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
1455 case AV_CODEC_ID_ADPCM_AICA:
1456 if (!c->has_status) {
1457 for (channel = 0; channel < avctx->channels; channel++)
1458 c->status[channel].step = 0;
1461 for (channel = 0; channel < avctx->channels; channel++) {
1462 samples = samples_p[channel];
1463 for (n = nb_samples >> 1; n > 0; n--) {
1464 int v = bytestream2_get_byteu(&gb);
1465 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v & 0x0F);
1466 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v >> 4 );
1470 case AV_CODEC_ID_ADPCM_AFC:
1472 int samples_per_block;
1475 if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) {
1476 samples_per_block = avctx->extradata[0] / 16;
1477 blocks = nb_samples / avctx->extradata[0];
1479 samples_per_block = nb_samples / 16;
1483 for (m = 0; m < blocks; m++) {
1484 for (channel = 0; channel < avctx->channels; channel++) {
1485 int prev1 = c->status[channel].sample1;
1486 int prev2 = c->status[channel].sample2;
1488 samples = samples_p[channel] + m * 16;
1489 /* Read in every sample for this channel. */
1490 for (i = 0; i < samples_per_block; i++) {
1491 int byte = bytestream2_get_byteu(&gb);
1492 int scale = 1 << (byte >> 4);
1493 int index = byte & 0xf;
1494 int factor1 = ff_adpcm_afc_coeffs[0][index];
1495 int factor2 = ff_adpcm_afc_coeffs[1][index];
1497 /* Decode 16 samples. */
1498 for (n = 0; n < 16; n++) {
1502 sampledat = sign_extend(byte, 4);
1504 byte = bytestream2_get_byteu(&gb);
1505 sampledat = sign_extend(byte >> 4, 4);
1508 sampledat = ((prev1 * factor1 + prev2 * factor2) +
1509 ((sampledat * scale) << 11)) >> 11;
1510 *samples = av_clip_int16(sampledat);
1516 c->status[channel].sample1 = prev1;
1517 c->status[channel].sample2 = prev2;
1520 bytestream2_seek(&gb, 0, SEEK_END);
1523 case AV_CODEC_ID_ADPCM_THP:
1524 case AV_CODEC_ID_ADPCM_THP_LE:
1529 #define THP_GET16(g) \
1531 avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE ? \
1532 bytestream2_get_le16u(&(g)) : \
1533 bytestream2_get_be16u(&(g)), 16)
1535 if (avctx->extradata) {
1537 if (avctx->extradata_size < 32 * avctx->channels) {
1538 av_log(avctx, AV_LOG_ERROR, "Missing coeff table\n");
1539 return AVERROR_INVALIDDATA;
1542 bytestream2_init(&tb, avctx->extradata, avctx->extradata_size);
1543 for (i = 0; i < avctx->channels; i++)
1544 for (n = 0; n < 16; n++)
1545 table[i][n] = THP_GET16(tb);
1547 for (i = 0; i < avctx->channels; i++)
1548 for (n = 0; n < 16; n++)
1549 table[i][n] = THP_GET16(gb);
1551 if (!c->has_status) {
1552 /* Initialize the previous sample. */
1553 for (i = 0; i < avctx->channels; i++) {
1554 c->status[i].sample1 = THP_GET16(gb);
1555 c->status[i].sample2 = THP_GET16(gb);
1559 bytestream2_skip(&gb, avctx->channels * 4);
1563 for (ch = 0; ch < avctx->channels; ch++) {
1564 samples = samples_p[ch];
1566 /* Read in every sample for this channel. */
1567 for (i = 0; i < (nb_samples + 13) / 14; i++) {
1568 int byte = bytestream2_get_byteu(&gb);
1569 int index = (byte >> 4) & 7;
1570 unsigned int exp = byte & 0x0F;
1571 int factor1 = table[ch][index * 2];
1572 int factor2 = table[ch][index * 2 + 1];
1574 /* Decode 14 samples. */
1575 for (n = 0; n < 14 && (i * 14 + n < nb_samples); n++) {
1579 sampledat = sign_extend(byte, 4);
1581 byte = bytestream2_get_byteu(&gb);
1582 sampledat = sign_extend(byte >> 4, 4);
1585 sampledat = ((c->status[ch].sample1 * factor1
1586 + c->status[ch].sample2 * factor2) >> 11) + (sampledat << exp);
1587 *samples = av_clip_int16(sampledat);
1588 c->status[ch].sample2 = c->status[ch].sample1;
1589 c->status[ch].sample1 = *samples++;
1595 case AV_CODEC_ID_ADPCM_DTK:
1596 for (channel = 0; channel < avctx->channels; channel++) {
1597 samples = samples_p[channel];
1599 /* Read in every sample for this channel. */
1600 for (i = 0; i < nb_samples / 28; i++) {
1603 bytestream2_skipu(&gb, 1);
1604 header = bytestream2_get_byteu(&gb);
1605 bytestream2_skipu(&gb, 3 - channel);
1607 /* Decode 28 samples. */
1608 for (n = 0; n < 28; n++) {
1609 int32_t sampledat, prev;
1611 switch (header >> 4) {
1613 prev = (c->status[channel].sample1 * 0x3c);
1616 prev = (c->status[channel].sample1 * 0x73) - (c->status[channel].sample2 * 0x34);
1619 prev = (c->status[channel].sample1 * 0x62) - (c->status[channel].sample2 * 0x37);
1625 prev = av_clip_intp2((prev + 0x20) >> 6, 21);
1627 byte = bytestream2_get_byteu(&gb);
1629 sampledat = sign_extend(byte, 4);
1631 sampledat = sign_extend(byte >> 4, 4);
1633 sampledat = (((sampledat << 12) >> (header & 0xf)) << 6) + prev;
1634 *samples++ = av_clip_int16(sampledat >> 6);
1635 c->status[channel].sample2 = c->status[channel].sample1;
1636 c->status[channel].sample1 = sampledat;
1640 bytestream2_seek(&gb, 0, SEEK_SET);
1643 case AV_CODEC_ID_ADPCM_PSX:
1644 for (channel = 0; channel < avctx->channels; channel++) {
1645 samples = samples_p[channel];
1647 /* Read in every sample for this channel. */
1648 for (i = 0; i < nb_samples / 28; i++) {
1649 int filter, shift, flag, byte;
1651 filter = bytestream2_get_byteu(&gb);
1652 shift = filter & 0xf;
1653 filter = filter >> 4;
1654 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table))
1655 return AVERROR_INVALIDDATA;
1656 flag = bytestream2_get_byteu(&gb);
1658 /* Decode 28 samples. */
1659 for (n = 0; n < 28; n++) {
1660 int sample = 0, scale;
1664 scale = sign_extend(byte >> 4, 4);
1666 byte = bytestream2_get_byteu(&gb);
1667 scale = sign_extend(byte, 4);
1670 scale = scale << 12;
1671 sample = (int)((scale >> shift) + (c->status[channel].sample1 * xa_adpcm_table[filter][0] + c->status[channel].sample2 * xa_adpcm_table[filter][1]) / 64);
1673 *samples++ = av_clip_int16(sample);
1674 c->status[channel].sample2 = c->status[channel].sample1;
1675 c->status[channel].sample1 = sample;
1685 if (avpkt->size && bytestream2_tell(&gb) == 0) {
1686 av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n");
1687 return AVERROR_INVALIDDATA;
1692 if (avpkt->size < bytestream2_tell(&gb)) {
1693 av_log(avctx, AV_LOG_ERROR, "Overread of %d < %d\n", avpkt->size, bytestream2_tell(&gb));
1697 return bytestream2_tell(&gb);
1700 static void adpcm_flush(AVCodecContext *avctx)
1702 ADPCMDecodeContext *c = avctx->priv_data;
1707 static const enum AVSampleFormat sample_fmts_s16[] = { AV_SAMPLE_FMT_S16,
1708 AV_SAMPLE_FMT_NONE };
1709 static const enum AVSampleFormat sample_fmts_s16p[] = { AV_SAMPLE_FMT_S16P,
1710 AV_SAMPLE_FMT_NONE };
1711 static const enum AVSampleFormat sample_fmts_both[] = { AV_SAMPLE_FMT_S16,
1713 AV_SAMPLE_FMT_NONE };
1715 #define ADPCM_DECODER(id_, sample_fmts_, name_, long_name_) \
1716 AVCodec ff_ ## name_ ## _decoder = { \
1718 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1719 .type = AVMEDIA_TYPE_AUDIO, \
1721 .priv_data_size = sizeof(ADPCMDecodeContext), \
1722 .init = adpcm_decode_init, \
1723 .decode = adpcm_decode_frame, \
1724 .flush = adpcm_flush, \
1725 .capabilities = AV_CODEC_CAP_DR1, \
1726 .sample_fmts = sample_fmts_, \
1729 /* Note: Do not forget to add new entries to the Makefile as well. */
1730 ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie");
1731 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC");
1732 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AICA, sample_fmts_s16p, adpcm_aica, "ADPCM Yamaha AICA");
1733 ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology");
1734 ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK");
1735 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts");
1736 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
1737 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1");
1738 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2");
1739 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3");
1740 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
1741 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV");
1742 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC");
1743 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DAT4, sample_fmts_s16, adpcm_ima_dat4, "ADPCM IMA Eurocom DAT4");
1744 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
1745 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
1746 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
1747 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
1748 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
1749 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI");
1750 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime");
1751 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical");
1752 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
1753 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV");
1754 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood");
1755 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MS, sample_fmts_s16, adpcm_ms, "ADPCM Microsoft");
1756 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MTAF, sample_fmts_s16p, adpcm_mtaf, "ADPCM MTAF");
1757 ADPCM_DECODER(AV_CODEC_ID_ADPCM_PSX, sample_fmts_s16p, adpcm_psx, "ADPCM Playstation");
1758 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
1759 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
1760 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
1761 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash");
1762 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP_LE, sample_fmts_s16p, adpcm_thp_le, "ADPCM Nintendo THP (little-endian)");
1763 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo THP");
1764 ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA");
1765 ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha");