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[6];
88 int vqa_version; /**< VQA version. Used for ADPCM_IMA_WS */
91 static av_cold int adpcm_decode_init(AVCodecContext * avctx)
93 ADPCMDecodeContext *c = avctx->priv_data;
94 unsigned int min_channels = 1;
95 unsigned int max_channels = 2;
97 switch(avctx->codec->id) {
98 case AV_CODEC_ID_ADPCM_DTK:
99 case AV_CODEC_ID_ADPCM_EA:
102 case AV_CODEC_ID_ADPCM_AFC:
103 case AV_CODEC_ID_ADPCM_EA_R1:
104 case AV_CODEC_ID_ADPCM_EA_R2:
105 case AV_CODEC_ID_ADPCM_EA_R3:
106 case AV_CODEC_ID_ADPCM_EA_XAS:
107 case AV_CODEC_ID_ADPCM_THP:
111 if (avctx->channels < min_channels || avctx->channels > max_channels) {
112 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
113 return AVERROR(EINVAL);
116 switch(avctx->codec->id) {
117 case AV_CODEC_ID_ADPCM_CT:
118 c->status[0].step = c->status[1].step = 511;
120 case AV_CODEC_ID_ADPCM_IMA_WAV:
121 if (avctx->bits_per_coded_sample < 2 || avctx->bits_per_coded_sample > 5)
122 return AVERROR_INVALIDDATA;
124 case AV_CODEC_ID_ADPCM_IMA_APC:
125 if (avctx->extradata && avctx->extradata_size >= 8) {
126 c->status[0].predictor = AV_RL32(avctx->extradata);
127 c->status[1].predictor = AV_RL32(avctx->extradata + 4);
130 case AV_CODEC_ID_ADPCM_IMA_WS:
131 if (avctx->extradata && avctx->extradata_size >= 2)
132 c->vqa_version = AV_RL16(avctx->extradata);
138 switch(avctx->codec->id) {
139 case AV_CODEC_ID_ADPCM_IMA_QT:
140 case AV_CODEC_ID_ADPCM_IMA_WAV:
141 case AV_CODEC_ID_ADPCM_4XM:
142 case AV_CODEC_ID_ADPCM_XA:
143 case AV_CODEC_ID_ADPCM_EA_R1:
144 case AV_CODEC_ID_ADPCM_EA_R2:
145 case AV_CODEC_ID_ADPCM_EA_R3:
146 case AV_CODEC_ID_ADPCM_EA_XAS:
147 case AV_CODEC_ID_ADPCM_THP:
148 case AV_CODEC_ID_ADPCM_AFC:
149 case AV_CODEC_ID_ADPCM_DTK:
150 avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
152 case AV_CODEC_ID_ADPCM_IMA_WS:
153 avctx->sample_fmt = c->vqa_version == 3 ? AV_SAMPLE_FMT_S16P :
157 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
163 static inline short adpcm_ima_expand_nibble(ADPCMChannelStatus *c, char nibble, int shift)
167 int sign, delta, diff, step;
169 step = ff_adpcm_step_table[c->step_index];
170 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
171 step_index = av_clip(step_index, 0, 88);
175 /* perform direct multiplication instead of series of jumps proposed by
176 * the reference ADPCM implementation since modern CPUs can do the mults
178 diff = ((2 * delta + 1) * step) >> shift;
179 predictor = c->predictor;
180 if (sign) predictor -= diff;
181 else predictor += diff;
183 c->predictor = av_clip_int16(predictor);
184 c->step_index = step_index;
186 return (short)c->predictor;
189 static inline int16_t adpcm_ima_wav_expand_nibble(ADPCMChannelStatus *c, GetBitContext *gb, int bps)
191 int nibble, step_index, predictor, sign, delta, diff, step, shift;
194 nibble = get_bits_le(gb, bps),
195 step = ff_adpcm_step_table[c->step_index];
196 step_index = c->step_index + ff_adpcm_index_tables[bps - 2][nibble];
197 step_index = av_clip(step_index, 0, 88);
199 sign = nibble & (1 << shift);
200 delta = nibble & ((1 << shift) - 1);
201 diff = ((2 * delta + 1) * step) >> shift;
202 predictor = c->predictor;
203 if (sign) predictor -= diff;
204 else predictor += diff;
206 c->predictor = av_clip_int16(predictor);
207 c->step_index = step_index;
209 return (int16_t)c->predictor;
212 static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble, int shift)
218 step = ff_adpcm_step_table[c->step_index];
219 step_index = c->step_index + ff_adpcm_index_table[nibble];
220 step_index = av_clip(step_index, 0, 88);
223 if (nibble & 4) diff += step;
224 if (nibble & 2) diff += step >> 1;
225 if (nibble & 1) diff += step >> 2;
228 predictor = c->predictor - diff;
230 predictor = c->predictor + diff;
232 c->predictor = av_clip_int16(predictor);
233 c->step_index = step_index;
238 static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble)
242 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
243 predictor += ((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
245 c->sample2 = c->sample1;
246 c->sample1 = av_clip_int16(predictor);
247 c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8;
248 if (c->idelta < 16) c->idelta = 16;
249 if (c->idelta > INT_MAX/768) {
250 av_log(NULL, AV_LOG_WARNING, "idelta overflow\n");
251 c->idelta = INT_MAX/768;
257 static inline short adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble)
259 int step_index, predictor, sign, delta, diff, step;
261 step = ff_adpcm_oki_step_table[c->step_index];
262 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
263 step_index = av_clip(step_index, 0, 48);
267 diff = ((2 * delta + 1) * step) >> 3;
268 predictor = c->predictor;
269 if (sign) predictor -= diff;
270 else predictor += diff;
272 c->predictor = av_clip_intp2(predictor, 11);
273 c->step_index = step_index;
275 return c->predictor << 4;
278 static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
280 int sign, delta, diff;
285 /* perform direct multiplication instead of series of jumps proposed by
286 * the reference ADPCM implementation since modern CPUs can do the mults
288 diff = ((2 * delta + 1) * c->step) >> 3;
289 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
290 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
291 c->predictor = av_clip_int16(c->predictor);
292 /* calculate new step and clamp it to range 511..32767 */
293 new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
294 c->step = av_clip(new_step, 511, 32767);
296 return (short)c->predictor;
299 static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble, int size, int shift)
301 int sign, delta, diff;
303 sign = nibble & (1<<(size-1));
304 delta = nibble & ((1<<(size-1))-1);
305 diff = delta << (7 + c->step + shift);
308 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
310 /* calculate new step */
311 if (delta >= (2*size - 3) && c->step < 3)
313 else if (delta == 0 && c->step > 0)
316 return (short) c->predictor;
319 static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned char nibble)
326 c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
327 c->predictor = av_clip_int16(c->predictor);
328 c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
329 c->step = av_clip(c->step, 127, 24567);
333 static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1,
334 const uint8_t *in, ADPCMChannelStatus *left,
335 ADPCMChannelStatus *right, int channels, int sample_offset)
338 int shift,filter,f0,f1;
342 out0 += sample_offset;
346 out1 += sample_offset;
349 shift = 12 - (in[4+i*2] & 15);
350 filter = in[4+i*2] >> 4;
351 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
352 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
355 f0 = xa_adpcm_table[filter][0];
356 f1 = xa_adpcm_table[filter][1];
364 t = sign_extend(d, 4);
365 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
367 s_1 = av_clip_int16(s);
374 s_1 = right->sample1;
375 s_2 = right->sample2;
378 shift = 12 - (in[5+i*2] & 15);
379 filter = in[5+i*2] >> 4;
380 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
381 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
385 f0 = xa_adpcm_table[filter][0];
386 f1 = xa_adpcm_table[filter][1];
391 t = sign_extend(d >> 4, 4);
392 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
394 s_1 = av_clip_int16(s);
399 right->sample1 = s_1;
400 right->sample2 = s_2;
406 out0 += 28 * (3 - channels);
407 out1 += 28 * (3 - channels);
413 static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples)
415 ADPCMDecodeContext *c = avctx->priv_data;
418 int k0, signmask, nb_bits, count;
419 int size = buf_size*8;
422 init_get_bits(&gb, buf, size);
424 //read bits & initial values
425 nb_bits = get_bits(&gb, 2)+2;
426 table = swf_index_tables[nb_bits-2];
427 k0 = 1 << (nb_bits-2);
428 signmask = 1 << (nb_bits-1);
430 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
431 for (i = 0; i < avctx->channels; i++) {
432 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
433 c->status[i].step_index = get_bits(&gb, 6);
436 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
439 for (i = 0; i < avctx->channels; i++) {
440 // similar to IMA adpcm
441 int delta = get_bits(&gb, nb_bits);
442 int step = ff_adpcm_step_table[c->status[i].step_index];
443 long vpdiff = 0; // vpdiff = (delta+0.5)*step/4
454 if (delta & signmask)
455 c->status[i].predictor -= vpdiff;
457 c->status[i].predictor += vpdiff;
459 c->status[i].step_index += table[delta & (~signmask)];
461 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
462 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
464 *samples++ = c->status[i].predictor;
471 * Get the number of samples that will be decoded from the packet.
472 * In one case, this is actually the maximum number of samples possible to
473 * decode with the given buf_size.
475 * @param[out] coded_samples set to the number of samples as coded in the
476 * packet, or 0 if the codec does not encode the
477 * number of samples in each frame.
478 * @param[out] approx_nb_samples set to non-zero if the number of samples
479 * returned is an approximation.
481 static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
482 int buf_size, int *coded_samples, int *approx_nb_samples)
484 ADPCMDecodeContext *s = avctx->priv_data;
486 int ch = avctx->channels;
487 int has_coded_samples = 0;
491 *approx_nb_samples = 0;
496 switch (avctx->codec->id) {
497 /* constant, only check buf_size */
498 case AV_CODEC_ID_ADPCM_EA_XAS:
499 if (buf_size < 76 * ch)
503 case AV_CODEC_ID_ADPCM_IMA_QT:
504 if (buf_size < 34 * ch)
508 /* simple 4-bit adpcm */
509 case AV_CODEC_ID_ADPCM_CT:
510 case AV_CODEC_ID_ADPCM_IMA_APC:
511 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
512 case AV_CODEC_ID_ADPCM_IMA_OKI:
513 case AV_CODEC_ID_ADPCM_IMA_WS:
514 case AV_CODEC_ID_ADPCM_YAMAHA:
515 nb_samples = buf_size * 2 / ch;
521 /* simple 4-bit adpcm, with header */
523 switch (avctx->codec->id) {
524 case AV_CODEC_ID_ADPCM_4XM:
525 case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
526 case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break;
527 case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break;
530 return (buf_size - header_size) * 2 / ch;
532 /* more complex formats */
533 switch (avctx->codec->id) {
534 case AV_CODEC_ID_ADPCM_EA:
535 has_coded_samples = 1;
536 *coded_samples = bytestream2_get_le32(gb);
537 *coded_samples -= *coded_samples % 28;
538 nb_samples = (buf_size - 12) / 30 * 28;
540 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
541 has_coded_samples = 1;
542 *coded_samples = bytestream2_get_le32(gb);
543 nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch;
545 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
546 nb_samples = (buf_size - ch) / ch * 2;
548 case AV_CODEC_ID_ADPCM_EA_R1:
549 case AV_CODEC_ID_ADPCM_EA_R2:
550 case AV_CODEC_ID_ADPCM_EA_R3:
551 /* maximum number of samples */
552 /* has internal offsets and a per-frame switch to signal raw 16-bit */
553 has_coded_samples = 1;
554 switch (avctx->codec->id) {
555 case AV_CODEC_ID_ADPCM_EA_R1:
556 header_size = 4 + 9 * ch;
557 *coded_samples = bytestream2_get_le32(gb);
559 case AV_CODEC_ID_ADPCM_EA_R2:
560 header_size = 4 + 5 * ch;
561 *coded_samples = bytestream2_get_le32(gb);
563 case AV_CODEC_ID_ADPCM_EA_R3:
564 header_size = 4 + 5 * ch;
565 *coded_samples = bytestream2_get_be32(gb);
568 *coded_samples -= *coded_samples % 28;
569 nb_samples = (buf_size - header_size) * 2 / ch;
570 nb_samples -= nb_samples % 28;
571 *approx_nb_samples = 1;
573 case AV_CODEC_ID_ADPCM_IMA_DK3:
574 if (avctx->block_align > 0)
575 buf_size = FFMIN(buf_size, avctx->block_align);
576 nb_samples = ((buf_size - 16) * 2 / 3 * 4) / ch;
578 case AV_CODEC_ID_ADPCM_IMA_DK4:
579 if (avctx->block_align > 0)
580 buf_size = FFMIN(buf_size, avctx->block_align);
581 nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch;
583 case AV_CODEC_ID_ADPCM_IMA_RAD:
584 if (avctx->block_align > 0)
585 buf_size = FFMIN(buf_size, avctx->block_align);
586 nb_samples = (buf_size - 4 * ch) * 2 / ch;
588 case AV_CODEC_ID_ADPCM_IMA_WAV:
590 int bsize = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
591 int bsamples = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
592 if (avctx->block_align > 0)
593 buf_size = FFMIN(buf_size, avctx->block_align);
594 nb_samples = 1 + (buf_size - 4 * ch) / (bsize * ch) * bsamples;
597 case AV_CODEC_ID_ADPCM_MS:
598 if (avctx->block_align > 0)
599 buf_size = FFMIN(buf_size, avctx->block_align);
600 nb_samples = 2 + (buf_size - 7 * ch) * 2 / ch;
602 case AV_CODEC_ID_ADPCM_SBPRO_2:
603 case AV_CODEC_ID_ADPCM_SBPRO_3:
604 case AV_CODEC_ID_ADPCM_SBPRO_4:
606 int samples_per_byte;
607 switch (avctx->codec->id) {
608 case AV_CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break;
609 case AV_CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break;
610 case AV_CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break;
612 if (!s->status[0].step_index) {
616 nb_samples += buf_size * samples_per_byte / ch;
619 case AV_CODEC_ID_ADPCM_SWF:
621 int buf_bits = buf_size * 8 - 2;
622 int nbits = (bytestream2_get_byte(gb) >> 6) + 2;
623 int block_hdr_size = 22 * ch;
624 int block_size = block_hdr_size + nbits * ch * 4095;
625 int nblocks = buf_bits / block_size;
626 int bits_left = buf_bits - nblocks * block_size;
627 nb_samples = nblocks * 4096;
628 if (bits_left >= block_hdr_size)
629 nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch);
632 case AV_CODEC_ID_ADPCM_THP:
633 if (avctx->extradata) {
634 nb_samples = buf_size / (8 * ch) * 14;
637 has_coded_samples = 1;
638 bytestream2_skip(gb, 4); // channel size
639 *coded_samples = bytestream2_get_be32(gb);
640 *coded_samples -= *coded_samples % 14;
641 nb_samples = (buf_size - (8 + 36 * ch)) / (8 * ch) * 14;
643 case AV_CODEC_ID_ADPCM_AFC:
644 nb_samples = buf_size / (9 * ch) * 16;
646 case AV_CODEC_ID_ADPCM_XA:
647 nb_samples = (buf_size / 128) * 224 / ch;
649 case AV_CODEC_ID_ADPCM_DTK:
650 nb_samples = buf_size / (16 * ch) * 28;
654 /* validate coded sample count */
655 if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
656 return AVERROR_INVALIDDATA;
661 static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
662 int *got_frame_ptr, AVPacket *avpkt)
664 AVFrame *frame = data;
665 const uint8_t *buf = avpkt->data;
666 int buf_size = avpkt->size;
667 ADPCMDecodeContext *c = avctx->priv_data;
668 ADPCMChannelStatus *cs;
669 int n, m, channel, i;
674 int nb_samples, coded_samples, approx_nb_samples, ret;
677 bytestream2_init(&gb, buf, buf_size);
678 nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples, &approx_nb_samples);
679 if (nb_samples <= 0) {
680 av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
681 return AVERROR_INVALIDDATA;
684 /* get output buffer */
685 frame->nb_samples = nb_samples;
686 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
688 samples = (short *)frame->data[0];
689 samples_p = (int16_t **)frame->extended_data;
691 /* use coded_samples when applicable */
692 /* it is always <= nb_samples, so the output buffer will be large enough */
694 if (!approx_nb_samples && coded_samples != nb_samples)
695 av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
696 frame->nb_samples = nb_samples = coded_samples;
699 st = avctx->channels == 2 ? 1 : 0;
701 switch(avctx->codec->id) {
702 case AV_CODEC_ID_ADPCM_IMA_QT:
703 /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
704 Channel data is interleaved per-chunk. */
705 for (channel = 0; channel < avctx->channels; channel++) {
708 cs = &(c->status[channel]);
709 /* (pppppp) (piiiiiii) */
711 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
712 predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
713 step_index = predictor & 0x7F;
716 if (cs->step_index == step_index) {
717 int diff = predictor - cs->predictor;
724 cs->step_index = step_index;
725 cs->predictor = predictor;
728 if (cs->step_index > 88u){
729 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
730 channel, cs->step_index);
731 return AVERROR_INVALIDDATA;
734 samples = samples_p[channel];
736 for (m = 0; m < 64; m += 2) {
737 int byte = bytestream2_get_byteu(&gb);
738 samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F, 3);
739 samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 , 3);
743 case AV_CODEC_ID_ADPCM_IMA_WAV:
744 for(i=0; i<avctx->channels; i++){
745 cs = &(c->status[i]);
746 cs->predictor = samples_p[i][0] = sign_extend(bytestream2_get_le16u(&gb), 16);
748 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
749 if (cs->step_index > 88u){
750 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
752 return AVERROR_INVALIDDATA;
756 if (avctx->bits_per_coded_sample != 4) {
757 int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
760 init_get_bits8(&g, gb.buffer, bytestream2_get_bytes_left(&gb));
761 for (n = 0; n < (nb_samples - 1) / samples_per_block; n++) {
762 for (i = 0; i < avctx->channels; i++) {
764 samples = &samples_p[i][1 + n * samples_per_block];
765 for (m = 0; m < samples_per_block; m++) {
766 samples[m] = adpcm_ima_wav_expand_nibble(cs, &g,
767 avctx->bits_per_coded_sample);
771 bytestream2_skip(&gb, avctx->block_align - avctx->channels * 4);
773 for (n = 0; n < (nb_samples - 1) / 8; n++) {
774 for (i = 0; i < avctx->channels; i++) {
776 samples = &samples_p[i][1 + n * 8];
777 for (m = 0; m < 8; m += 2) {
778 int v = bytestream2_get_byteu(&gb);
779 samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
780 samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
786 case AV_CODEC_ID_ADPCM_4XM:
787 for (i = 0; i < avctx->channels; i++)
788 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
790 for (i = 0; i < avctx->channels; i++) {
791 c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
792 if (c->status[i].step_index > 88u) {
793 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
794 i, c->status[i].step_index);
795 return AVERROR_INVALIDDATA;
799 for (i = 0; i < avctx->channels; i++) {
800 samples = (int16_t *)frame->data[i];
802 for (n = nb_samples >> 1; n > 0; n--) {
803 int v = bytestream2_get_byteu(&gb);
804 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
805 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
809 case AV_CODEC_ID_ADPCM_MS:
813 block_predictor = bytestream2_get_byteu(&gb);
814 if (block_predictor > 6) {
815 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n",
817 return AVERROR_INVALIDDATA;
819 c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
820 c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
822 block_predictor = bytestream2_get_byteu(&gb);
823 if (block_predictor > 6) {
824 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n",
826 return AVERROR_INVALIDDATA;
828 c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
829 c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
831 c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
833 c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
836 c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
837 if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
838 c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
839 if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
841 *samples++ = c->status[0].sample2;
842 if (st) *samples++ = c->status[1].sample2;
843 *samples++ = c->status[0].sample1;
844 if (st) *samples++ = c->status[1].sample1;
845 for(n = (nb_samples - 2) >> (1 - st); n > 0; n--) {
846 int byte = bytestream2_get_byteu(&gb);
847 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 );
848 *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F);
852 case AV_CODEC_ID_ADPCM_IMA_DK4:
853 for (channel = 0; channel < avctx->channels; channel++) {
854 cs = &c->status[channel];
855 cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16);
856 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
857 if (cs->step_index > 88u){
858 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
859 channel, cs->step_index);
860 return AVERROR_INVALIDDATA;
863 for (n = (nb_samples - 1) >> (1 - st); n > 0; n--) {
864 int v = bytestream2_get_byteu(&gb);
865 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
866 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
869 case AV_CODEC_ID_ADPCM_IMA_DK3:
873 int decode_top_nibble_next = 0;
875 const int16_t *samples_end = samples + avctx->channels * nb_samples;
877 bytestream2_skipu(&gb, 10);
878 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
879 c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
880 c->status[0].step_index = bytestream2_get_byteu(&gb);
881 c->status[1].step_index = bytestream2_get_byteu(&gb);
882 if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){
883 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n",
884 c->status[0].step_index, c->status[1].step_index);
885 return AVERROR_INVALIDDATA;
887 /* sign extend the predictors */
888 diff_channel = c->status[1].predictor;
890 /* DK3 ADPCM support macro */
891 #define DK3_GET_NEXT_NIBBLE() \
892 if (decode_top_nibble_next) { \
893 nibble = last_byte >> 4; \
894 decode_top_nibble_next = 0; \
896 last_byte = bytestream2_get_byteu(&gb); \
897 nibble = last_byte & 0x0F; \
898 decode_top_nibble_next = 1; \
901 while (samples < samples_end) {
903 /* for this algorithm, c->status[0] is the sum channel and
904 * c->status[1] is the diff channel */
906 /* process the first predictor of the sum channel */
907 DK3_GET_NEXT_NIBBLE();
908 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
910 /* process the diff channel predictor */
911 DK3_GET_NEXT_NIBBLE();
912 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
914 /* process the first pair of stereo PCM samples */
915 diff_channel = (diff_channel + c->status[1].predictor) / 2;
916 *samples++ = c->status[0].predictor + c->status[1].predictor;
917 *samples++ = c->status[0].predictor - c->status[1].predictor;
919 /* process the second predictor of the sum channel */
920 DK3_GET_NEXT_NIBBLE();
921 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
923 /* process the second pair of stereo PCM samples */
924 diff_channel = (diff_channel + c->status[1].predictor) / 2;
925 *samples++ = c->status[0].predictor + c->status[1].predictor;
926 *samples++ = c->status[0].predictor - c->status[1].predictor;
929 if ((bytestream2_tell(&gb) & 1))
930 bytestream2_skip(&gb, 1);
933 case AV_CODEC_ID_ADPCM_IMA_ISS:
934 for (channel = 0; channel < avctx->channels; channel++) {
935 cs = &c->status[channel];
936 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
937 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
938 if (cs->step_index > 88u){
939 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
940 channel, cs->step_index);
941 return AVERROR_INVALIDDATA;
945 for (n = nb_samples >> (1 - st); n > 0; n--) {
947 int v = bytestream2_get_byteu(&gb);
948 /* nibbles are swapped for mono */
956 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
957 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
960 case AV_CODEC_ID_ADPCM_IMA_APC:
961 while (bytestream2_get_bytes_left(&gb) > 0) {
962 int v = bytestream2_get_byteu(&gb);
963 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
964 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
967 case AV_CODEC_ID_ADPCM_IMA_OKI:
968 while (bytestream2_get_bytes_left(&gb) > 0) {
969 int v = bytestream2_get_byteu(&gb);
970 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 );
971 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F);
974 case AV_CODEC_ID_ADPCM_IMA_RAD:
975 for (channel = 0; channel < avctx->channels; channel++) {
976 cs = &c->status[channel];
977 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
978 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
979 if (cs->step_index > 88u){
980 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
981 channel, cs->step_index);
982 return AVERROR_INVALIDDATA;
985 for (n = 0; n < nb_samples / 2; n++) {
988 byte[0] = bytestream2_get_byteu(&gb);
990 byte[1] = bytestream2_get_byteu(&gb);
991 for(channel = 0; channel < avctx->channels; channel++) {
992 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] & 0x0F, 3);
994 for(channel = 0; channel < avctx->channels; channel++) {
995 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] >> 4 , 3);
999 case AV_CODEC_ID_ADPCM_IMA_WS:
1000 if (c->vqa_version == 3) {
1001 for (channel = 0; channel < avctx->channels; channel++) {
1002 int16_t *smp = samples_p[channel];
1004 for (n = nb_samples / 2; n > 0; n--) {
1005 int v = bytestream2_get_byteu(&gb);
1006 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1007 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1011 for (n = nb_samples / 2; n > 0; n--) {
1012 for (channel = 0; channel < avctx->channels; channel++) {
1013 int v = bytestream2_get_byteu(&gb);
1014 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1015 samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1017 samples += avctx->channels;
1020 bytestream2_seek(&gb, 0, SEEK_END);
1022 case AV_CODEC_ID_ADPCM_XA:
1024 int16_t *out0 = samples_p[0];
1025 int16_t *out1 = samples_p[1];
1026 int samples_per_block = 28 * (3 - avctx->channels) * 4;
1027 int sample_offset = 0;
1028 while (bytestream2_get_bytes_left(&gb) >= 128) {
1029 if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb),
1030 &c->status[0], &c->status[1],
1031 avctx->channels, sample_offset)) < 0)
1033 bytestream2_skipu(&gb, 128);
1034 sample_offset += samples_per_block;
1038 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
1039 for (i=0; i<=st; i++) {
1040 c->status[i].step_index = bytestream2_get_le32u(&gb);
1041 if (c->status[i].step_index > 88u) {
1042 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1043 i, c->status[i].step_index);
1044 return AVERROR_INVALIDDATA;
1047 for (i=0; i<=st; i++)
1048 c->status[i].predictor = bytestream2_get_le32u(&gb);
1050 for (n = nb_samples >> (1 - st); n > 0; n--) {
1051 int byte = bytestream2_get_byteu(&gb);
1052 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3);
1053 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3);
1056 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1057 for (n = nb_samples >> (1 - st); n > 0; n--) {
1058 int byte = bytestream2_get_byteu(&gb);
1059 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6);
1060 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6);
1063 case AV_CODEC_ID_ADPCM_EA:
1065 int previous_left_sample, previous_right_sample;
1066 int current_left_sample, current_right_sample;
1067 int next_left_sample, next_right_sample;
1068 int coeff1l, coeff2l, coeff1r, coeff2r;
1069 int shift_left, shift_right;
1071 /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
1072 each coding 28 stereo samples. */
1074 if(avctx->channels != 2)
1075 return AVERROR_INVALIDDATA;
1077 current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1078 previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1079 current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1080 previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1082 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1083 int byte = bytestream2_get_byteu(&gb);
1084 coeff1l = ea_adpcm_table[ byte >> 4 ];
1085 coeff2l = ea_adpcm_table[(byte >> 4 ) + 4];
1086 coeff1r = ea_adpcm_table[ byte & 0x0F];
1087 coeff2r = ea_adpcm_table[(byte & 0x0F) + 4];
1089 byte = bytestream2_get_byteu(&gb);
1090 shift_left = 20 - (byte >> 4);
1091 shift_right = 20 - (byte & 0x0F);
1093 for (count2 = 0; count2 < 28; count2++) {
1094 byte = bytestream2_get_byteu(&gb);
1095 next_left_sample = sign_extend(byte >> 4, 4) << shift_left;
1096 next_right_sample = sign_extend(byte, 4) << shift_right;
1098 next_left_sample = (next_left_sample +
1099 (current_left_sample * coeff1l) +
1100 (previous_left_sample * coeff2l) + 0x80) >> 8;
1101 next_right_sample = (next_right_sample +
1102 (current_right_sample * coeff1r) +
1103 (previous_right_sample * coeff2r) + 0x80) >> 8;
1105 previous_left_sample = current_left_sample;
1106 current_left_sample = av_clip_int16(next_left_sample);
1107 previous_right_sample = current_right_sample;
1108 current_right_sample = av_clip_int16(next_right_sample);
1109 *samples++ = current_left_sample;
1110 *samples++ = current_right_sample;
1114 bytestream2_skip(&gb, 2); // Skip terminating 0x0000
1118 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
1120 int coeff[2][2], shift[2];
1122 for(channel = 0; channel < avctx->channels; channel++) {
1123 int byte = bytestream2_get_byteu(&gb);
1125 coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i];
1126 shift[channel] = 20 - (byte & 0x0F);
1128 for (count1 = 0; count1 < nb_samples / 2; count1++) {
1131 byte[0] = bytestream2_get_byteu(&gb);
1132 if (st) byte[1] = bytestream2_get_byteu(&gb);
1133 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1134 for(channel = 0; channel < avctx->channels; channel++) {
1135 int sample = sign_extend(byte[channel] >> i, 4) << shift[channel];
1137 c->status[channel].sample1 * coeff[channel][0] +
1138 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1139 c->status[channel].sample2 = c->status[channel].sample1;
1140 c->status[channel].sample1 = av_clip_int16(sample);
1141 *samples++ = c->status[channel].sample1;
1145 bytestream2_seek(&gb, 0, SEEK_END);
1148 case AV_CODEC_ID_ADPCM_EA_R1:
1149 case AV_CODEC_ID_ADPCM_EA_R2:
1150 case AV_CODEC_ID_ADPCM_EA_R3: {
1151 /* channel numbering
1153 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1154 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1155 const int big_endian = avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R3;
1156 int previous_sample, current_sample, next_sample;
1159 unsigned int channel;
1164 for (channel=0; channel<avctx->channels; channel++)
1165 offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) :
1166 bytestream2_get_le32(&gb)) +
1167 (avctx->channels + 1) * 4;
1169 for (channel=0; channel<avctx->channels; channel++) {
1170 bytestream2_seek(&gb, offsets[channel], SEEK_SET);
1171 samplesC = samples_p[channel];
1173 if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) {
1174 current_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1175 previous_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1177 current_sample = c->status[channel].predictor;
1178 previous_sample = c->status[channel].prev_sample;
1181 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1182 int byte = bytestream2_get_byte(&gb);
1183 if (byte == 0xEE) { /* only seen in R2 and R3 */
1184 current_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1185 previous_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1187 for (count2=0; count2<28; count2++)
1188 *samplesC++ = sign_extend(bytestream2_get_be16(&gb), 16);
1190 coeff1 = ea_adpcm_table[ byte >> 4 ];
1191 coeff2 = ea_adpcm_table[(byte >> 4) + 4];
1192 shift = 20 - (byte & 0x0F);
1194 for (count2=0; count2<28; count2++) {
1196 next_sample = sign_extend(byte, 4) << shift;
1198 byte = bytestream2_get_byte(&gb);
1199 next_sample = sign_extend(byte >> 4, 4) << shift;
1202 next_sample += (current_sample * coeff1) +
1203 (previous_sample * coeff2);
1204 next_sample = av_clip_int16(next_sample >> 8);
1206 previous_sample = current_sample;
1207 current_sample = next_sample;
1208 *samplesC++ = current_sample;
1214 } else if (count != count1) {
1215 av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
1216 count = FFMAX(count, count1);
1219 if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) {
1220 c->status[channel].predictor = current_sample;
1221 c->status[channel].prev_sample = previous_sample;
1225 frame->nb_samples = count * 28;
1226 bytestream2_seek(&gb, 0, SEEK_END);
1229 case AV_CODEC_ID_ADPCM_EA_XAS:
1230 for (channel=0; channel<avctx->channels; channel++) {
1231 int coeff[2][4], shift[4];
1232 int16_t *s = samples_p[channel];
1233 for (n = 0; n < 4; n++, s += 32) {
1234 int val = sign_extend(bytestream2_get_le16u(&gb), 16);
1236 coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i];
1239 val = sign_extend(bytestream2_get_le16u(&gb), 16);
1240 shift[n] = 20 - (val & 0x0F);
1244 for (m=2; m<32; m+=2) {
1245 s = &samples_p[channel][m];
1246 for (n = 0; n < 4; n++, s += 32) {
1248 int byte = bytestream2_get_byteu(&gb);
1250 level = sign_extend(byte >> 4, 4) << shift[n];
1251 pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n];
1252 s[0] = av_clip_int16((level + pred + 0x80) >> 8);
1254 level = sign_extend(byte, 4) << shift[n];
1255 pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n];
1256 s[1] = av_clip_int16((level + pred + 0x80) >> 8);
1261 case AV_CODEC_ID_ADPCM_IMA_AMV:
1262 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1263 c->status[0].step_index = bytestream2_get_le16u(&gb);
1264 bytestream2_skipu(&gb, 4);
1265 if (c->status[0].step_index > 88u) {
1266 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1267 c->status[0].step_index);
1268 return AVERROR_INVALIDDATA;
1271 for (n = nb_samples >> (1 - st); n > 0; n--) {
1272 int v = bytestream2_get_byteu(&gb);
1274 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3);
1275 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3);
1278 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1279 for (i = 0; i < avctx->channels; i++) {
1280 c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
1281 c->status[i].step_index = bytestream2_get_byteu(&gb);
1282 bytestream2_skipu(&gb, 1);
1283 if (c->status[i].step_index > 88u) {
1284 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1285 c->status[i].step_index);
1286 return AVERROR_INVALIDDATA;
1290 for (n = nb_samples >> (1 - st); n > 0; n--) {
1291 int v = bytestream2_get_byteu(&gb);
1293 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4, 3);
1294 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf, 3);
1297 case AV_CODEC_ID_ADPCM_CT:
1298 for (n = nb_samples >> (1 - st); n > 0; n--) {
1299 int v = bytestream2_get_byteu(&gb);
1300 *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
1301 *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
1304 case AV_CODEC_ID_ADPCM_SBPRO_4:
1305 case AV_CODEC_ID_ADPCM_SBPRO_3:
1306 case AV_CODEC_ID_ADPCM_SBPRO_2:
1307 if (!c->status[0].step_index) {
1308 /* the first byte is a raw sample */
1309 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1311 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1312 c->status[0].step_index = 1;
1315 if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) {
1316 for (n = nb_samples >> (1 - st); n > 0; n--) {
1317 int byte = bytestream2_get_byteu(&gb);
1318 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1320 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1323 } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) {
1324 for (n = (nb_samples<<st) / 3; n > 0; n--) {
1325 int byte = bytestream2_get_byteu(&gb);
1326 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1328 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1329 (byte >> 2) & 0x07, 3, 0);
1330 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1334 for (n = nb_samples >> (2 - st); n > 0; n--) {
1335 int byte = bytestream2_get_byteu(&gb);
1336 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1338 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1339 (byte >> 4) & 0x03, 2, 2);
1340 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1341 (byte >> 2) & 0x03, 2, 2);
1342 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1347 case AV_CODEC_ID_ADPCM_SWF:
1348 adpcm_swf_decode(avctx, buf, buf_size, samples);
1349 bytestream2_seek(&gb, 0, SEEK_END);
1351 case AV_CODEC_ID_ADPCM_YAMAHA:
1352 for (n = nb_samples >> (1 - st); n > 0; n--) {
1353 int v = bytestream2_get_byteu(&gb);
1354 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
1355 *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
1358 case AV_CODEC_ID_ADPCM_AFC:
1360 int samples_per_block;
1363 if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) {
1364 samples_per_block = avctx->extradata[0] / 16;
1365 blocks = nb_samples / avctx->extradata[0];
1367 samples_per_block = nb_samples / 16;
1371 for (m = 0; m < blocks; m++) {
1372 for (channel = 0; channel < avctx->channels; channel++) {
1373 int prev1 = c->status[channel].sample1;
1374 int prev2 = c->status[channel].sample2;
1376 samples = samples_p[channel] + m * 16;
1377 /* Read in every sample for this channel. */
1378 for (i = 0; i < samples_per_block; i++) {
1379 int byte = bytestream2_get_byteu(&gb);
1380 int scale = 1 << (byte >> 4);
1381 int index = byte & 0xf;
1382 int factor1 = ff_adpcm_afc_coeffs[0][index];
1383 int factor2 = ff_adpcm_afc_coeffs[1][index];
1385 /* Decode 16 samples. */
1386 for (n = 0; n < 16; n++) {
1390 sampledat = sign_extend(byte, 4);
1392 byte = bytestream2_get_byteu(&gb);
1393 sampledat = sign_extend(byte >> 4, 4);
1396 sampledat = ((prev1 * factor1 + prev2 * factor2) +
1397 ((sampledat * scale) << 11)) >> 11;
1398 *samples = av_clip_int16(sampledat);
1404 c->status[channel].sample1 = prev1;
1405 c->status[channel].sample2 = prev2;
1408 bytestream2_seek(&gb, 0, SEEK_END);
1411 case AV_CODEC_ID_ADPCM_THP:
1416 if (avctx->extradata) {
1418 if (avctx->extradata_size < 32 * avctx->channels) {
1419 av_log(avctx, AV_LOG_ERROR, "Missing coeff table\n");
1420 return AVERROR_INVALIDDATA;
1423 bytestream2_init(&tb, avctx->extradata, avctx->extradata_size);
1424 for (i = 0; i < avctx->channels; i++)
1425 for (n = 0; n < 16; n++)
1426 table[i][n] = sign_extend(bytestream2_get_be16u(&tb), 16);
1428 for (i = 0; i < avctx->channels; i++)
1429 for (n = 0; n < 16; n++)
1430 table[i][n] = sign_extend(bytestream2_get_be16u(&gb), 16);
1432 /* Initialize the previous sample. */
1433 for (i = 0; i < avctx->channels; i++) {
1434 c->status[i].sample1 = sign_extend(bytestream2_get_be16u(&gb), 16);
1435 c->status[i].sample2 = sign_extend(bytestream2_get_be16u(&gb), 16);
1439 for (ch = 0; ch < avctx->channels; ch++) {
1440 samples = samples_p[ch];
1442 /* Read in every sample for this channel. */
1443 for (i = 0; i < nb_samples / 14; i++) {
1444 int byte = bytestream2_get_byteu(&gb);
1445 int index = (byte >> 4) & 7;
1446 unsigned int exp = byte & 0x0F;
1447 int factor1 = table[ch][index * 2];
1448 int factor2 = table[ch][index * 2 + 1];
1450 /* Decode 14 samples. */
1451 for (n = 0; n < 14; n++) {
1455 sampledat = sign_extend(byte, 4);
1457 byte = bytestream2_get_byteu(&gb);
1458 sampledat = sign_extend(byte >> 4, 4);
1461 sampledat = ((c->status[ch].sample1 * factor1
1462 + c->status[ch].sample2 * factor2) >> 11) + (sampledat << exp);
1463 *samples = av_clip_int16(sampledat);
1464 c->status[ch].sample2 = c->status[ch].sample1;
1465 c->status[ch].sample1 = *samples++;
1471 case AV_CODEC_ID_ADPCM_DTK:
1472 for (channel = 0; channel < avctx->channels; channel++) {
1473 samples = samples_p[channel];
1475 /* Read in every sample for this channel. */
1476 for (i = 0; i < nb_samples / 28; i++) {
1479 bytestream2_skipu(&gb, 1);
1480 header = bytestream2_get_byteu(&gb);
1481 bytestream2_skipu(&gb, 3 - channel);
1483 /* Decode 28 samples. */
1484 for (n = 0; n < 28; n++) {
1485 int32_t sampledat, prev;
1487 switch (header >> 4) {
1489 prev = (c->status[channel].sample1 * 0x3c);
1492 prev = (c->status[channel].sample1 * 0x73) - (c->status[channel].sample2 * 0x34);
1495 prev = (c->status[channel].sample1 * 0x62) - (c->status[channel].sample2 * 0x37);
1501 prev = av_clip((prev + 0x20) >> 6, -0x200000, 0x1fffff);
1503 byte = bytestream2_get_byteu(&gb);
1505 sampledat = sign_extend(byte, 4);
1507 sampledat = sign_extend(byte >> 4, 4);
1509 sampledat = (((sampledat << 12) >> (header & 0xf)) << 6) + prev;
1510 *samples++ = av_clip_int16(sampledat >> 6);
1511 c->status[channel].sample2 = c->status[channel].sample1;
1512 c->status[channel].sample1 = sampledat;
1516 bytestream2_seek(&gb, 0, SEEK_SET);
1524 if (avpkt->size && bytestream2_tell(&gb) == 0) {
1525 av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n");
1526 return AVERROR_INVALIDDATA;
1531 return bytestream2_tell(&gb);
1535 static const enum AVSampleFormat sample_fmts_s16[] = { AV_SAMPLE_FMT_S16,
1536 AV_SAMPLE_FMT_NONE };
1537 static const enum AVSampleFormat sample_fmts_s16p[] = { AV_SAMPLE_FMT_S16P,
1538 AV_SAMPLE_FMT_NONE };
1539 static const enum AVSampleFormat sample_fmts_both[] = { AV_SAMPLE_FMT_S16,
1541 AV_SAMPLE_FMT_NONE };
1543 #define ADPCM_DECODER(id_, sample_fmts_, name_, long_name_) \
1544 AVCodec ff_ ## name_ ## _decoder = { \
1546 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1547 .type = AVMEDIA_TYPE_AUDIO, \
1549 .priv_data_size = sizeof(ADPCMDecodeContext), \
1550 .init = adpcm_decode_init, \
1551 .decode = adpcm_decode_frame, \
1552 .capabilities = CODEC_CAP_DR1, \
1553 .sample_fmts = sample_fmts_, \
1556 /* Note: Do not forget to add new entries to the Makefile as well. */
1557 ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie");
1558 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC");
1559 ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology");
1560 ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK");
1561 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts");
1562 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
1563 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1");
1564 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2");
1565 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3");
1566 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
1567 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV");
1568 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC");
1569 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
1570 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
1571 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
1572 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
1573 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
1574 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI");
1575 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime");
1576 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical");
1577 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
1578 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV");
1579 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood");
1580 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MS, sample_fmts_s16, adpcm_ms, "ADPCM Microsoft");
1581 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
1582 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
1583 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
1584 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash");
1585 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo Gamecube THP");
1586 ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA");
1587 ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha");