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;
253 static inline short adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble)
255 int step_index, predictor, sign, delta, diff, step;
257 step = ff_adpcm_oki_step_table[c->step_index];
258 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
259 step_index = av_clip(step_index, 0, 48);
263 diff = ((2 * delta + 1) * step) >> 3;
264 predictor = c->predictor;
265 if (sign) predictor -= diff;
266 else predictor += diff;
268 c->predictor = av_clip(predictor, -2048, 2047);
269 c->step_index = step_index;
271 return c->predictor << 4;
274 static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
276 int sign, delta, diff;
281 /* perform direct multiplication instead of series of jumps proposed by
282 * the reference ADPCM implementation since modern CPUs can do the mults
284 diff = ((2 * delta + 1) * c->step) >> 3;
285 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
286 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
287 c->predictor = av_clip_int16(c->predictor);
288 /* calculate new step and clamp it to range 511..32767 */
289 new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
290 c->step = av_clip(new_step, 511, 32767);
292 return (short)c->predictor;
295 static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble, int size, int shift)
297 int sign, delta, diff;
299 sign = nibble & (1<<(size-1));
300 delta = nibble & ((1<<(size-1))-1);
301 diff = delta << (7 + c->step + shift);
304 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
306 /* calculate new step */
307 if (delta >= (2*size - 3) && c->step < 3)
309 else if (delta == 0 && c->step > 0)
312 return (short) c->predictor;
315 static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned char nibble)
322 c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
323 c->predictor = av_clip_int16(c->predictor);
324 c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
325 c->step = av_clip(c->step, 127, 24567);
329 static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1,
330 const uint8_t *in, ADPCMChannelStatus *left,
331 ADPCMChannelStatus *right, int channels, int sample_offset)
334 int shift,filter,f0,f1;
338 out0 += sample_offset;
342 out1 += sample_offset;
345 shift = 12 - (in[4+i*2] & 15);
346 filter = in[4+i*2] >> 4;
347 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
348 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
351 f0 = xa_adpcm_table[filter][0];
352 f1 = xa_adpcm_table[filter][1];
360 t = sign_extend(d, 4);
361 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
363 s_1 = av_clip_int16(s);
370 s_1 = right->sample1;
371 s_2 = right->sample2;
374 shift = 12 - (in[5+i*2] & 15);
375 filter = in[5+i*2] >> 4;
376 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
377 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
381 f0 = xa_adpcm_table[filter][0];
382 f1 = xa_adpcm_table[filter][1];
387 t = sign_extend(d >> 4, 4);
388 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
390 s_1 = av_clip_int16(s);
395 right->sample1 = s_1;
396 right->sample2 = s_2;
402 out0 += 28 * (3 - channels);
403 out1 += 28 * (3 - channels);
409 static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples)
411 ADPCMDecodeContext *c = avctx->priv_data;
414 int k0, signmask, nb_bits, count;
415 int size = buf_size*8;
418 init_get_bits(&gb, buf, size);
420 //read bits & initial values
421 nb_bits = get_bits(&gb, 2)+2;
422 table = swf_index_tables[nb_bits-2];
423 k0 = 1 << (nb_bits-2);
424 signmask = 1 << (nb_bits-1);
426 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
427 for (i = 0; i < avctx->channels; i++) {
428 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
429 c->status[i].step_index = get_bits(&gb, 6);
432 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
435 for (i = 0; i < avctx->channels; i++) {
436 // similar to IMA adpcm
437 int delta = get_bits(&gb, nb_bits);
438 int step = ff_adpcm_step_table[c->status[i].step_index];
439 long vpdiff = 0; // vpdiff = (delta+0.5)*step/4
450 if (delta & signmask)
451 c->status[i].predictor -= vpdiff;
453 c->status[i].predictor += vpdiff;
455 c->status[i].step_index += table[delta & (~signmask)];
457 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
458 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
460 *samples++ = c->status[i].predictor;
467 * Get the number of samples that will be decoded from the packet.
468 * In one case, this is actually the maximum number of samples possible to
469 * decode with the given buf_size.
471 * @param[out] coded_samples set to the number of samples as coded in the
472 * packet, or 0 if the codec does not encode the
473 * number of samples in each frame.
474 * @param[out] approx_nb_samples set to non-zero if the number of samples
475 * returned is an approximation.
477 static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
478 int buf_size, int *coded_samples, int *approx_nb_samples)
480 ADPCMDecodeContext *s = avctx->priv_data;
482 int ch = avctx->channels;
483 int has_coded_samples = 0;
487 *approx_nb_samples = 0;
492 switch (avctx->codec->id) {
493 /* constant, only check buf_size */
494 case AV_CODEC_ID_ADPCM_EA_XAS:
495 if (buf_size < 76 * ch)
499 case AV_CODEC_ID_ADPCM_IMA_QT:
500 if (buf_size < 34 * ch)
504 /* simple 4-bit adpcm */
505 case AV_CODEC_ID_ADPCM_CT:
506 case AV_CODEC_ID_ADPCM_IMA_APC:
507 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
508 case AV_CODEC_ID_ADPCM_IMA_OKI:
509 case AV_CODEC_ID_ADPCM_IMA_WS:
510 case AV_CODEC_ID_ADPCM_YAMAHA:
511 nb_samples = buf_size * 2 / ch;
517 /* simple 4-bit adpcm, with header */
519 switch (avctx->codec->id) {
520 case AV_CODEC_ID_ADPCM_4XM:
521 case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
522 case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break;
523 case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break;
526 return (buf_size - header_size) * 2 / ch;
528 /* more complex formats */
529 switch (avctx->codec->id) {
530 case AV_CODEC_ID_ADPCM_EA:
531 has_coded_samples = 1;
532 *coded_samples = bytestream2_get_le32(gb);
533 *coded_samples -= *coded_samples % 28;
534 nb_samples = (buf_size - 12) / 30 * 28;
536 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
537 has_coded_samples = 1;
538 *coded_samples = bytestream2_get_le32(gb);
539 nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch;
541 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
542 nb_samples = (buf_size - ch) / ch * 2;
544 case AV_CODEC_ID_ADPCM_EA_R1:
545 case AV_CODEC_ID_ADPCM_EA_R2:
546 case AV_CODEC_ID_ADPCM_EA_R3:
547 /* maximum number of samples */
548 /* has internal offsets and a per-frame switch to signal raw 16-bit */
549 has_coded_samples = 1;
550 switch (avctx->codec->id) {
551 case AV_CODEC_ID_ADPCM_EA_R1:
552 header_size = 4 + 9 * ch;
553 *coded_samples = bytestream2_get_le32(gb);
555 case AV_CODEC_ID_ADPCM_EA_R2:
556 header_size = 4 + 5 * ch;
557 *coded_samples = bytestream2_get_le32(gb);
558 *approx_nb_samples = 1;
560 case AV_CODEC_ID_ADPCM_EA_R3:
561 header_size = 4 + 5 * ch;
562 *coded_samples = bytestream2_get_be32(gb);
563 *approx_nb_samples = 1;
566 *coded_samples -= *coded_samples % 28;
567 nb_samples = (buf_size - header_size) * 2 / ch;
568 nb_samples -= nb_samples % 28;
570 case AV_CODEC_ID_ADPCM_IMA_DK3:
571 if (avctx->block_align > 0)
572 buf_size = FFMIN(buf_size, avctx->block_align);
573 nb_samples = ((buf_size - 16) * 2 / 3 * 4) / ch;
575 case AV_CODEC_ID_ADPCM_IMA_DK4:
576 if (avctx->block_align > 0)
577 buf_size = FFMIN(buf_size, avctx->block_align);
578 nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch;
580 case AV_CODEC_ID_ADPCM_IMA_RAD:
581 if (avctx->block_align > 0)
582 buf_size = FFMIN(buf_size, avctx->block_align);
583 nb_samples = (buf_size - 4 * ch) * 2 / ch;
585 case AV_CODEC_ID_ADPCM_IMA_WAV:
587 int bsize = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
588 int bsamples = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
589 if (avctx->block_align > 0)
590 buf_size = FFMIN(buf_size, avctx->block_align);
591 nb_samples = 1 + (buf_size - 4 * ch) / (bsize * ch) * bsamples;
594 case AV_CODEC_ID_ADPCM_MS:
595 if (avctx->block_align > 0)
596 buf_size = FFMIN(buf_size, avctx->block_align);
597 nb_samples = 2 + (buf_size - 7 * ch) * 2 / ch;
599 case AV_CODEC_ID_ADPCM_SBPRO_2:
600 case AV_CODEC_ID_ADPCM_SBPRO_3:
601 case AV_CODEC_ID_ADPCM_SBPRO_4:
603 int samples_per_byte;
604 switch (avctx->codec->id) {
605 case AV_CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break;
606 case AV_CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break;
607 case AV_CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break;
609 if (!s->status[0].step_index) {
613 nb_samples += buf_size * samples_per_byte / ch;
616 case AV_CODEC_ID_ADPCM_SWF:
618 int buf_bits = buf_size * 8 - 2;
619 int nbits = (bytestream2_get_byte(gb) >> 6) + 2;
620 int block_hdr_size = 22 * ch;
621 int block_size = block_hdr_size + nbits * ch * 4095;
622 int nblocks = buf_bits / block_size;
623 int bits_left = buf_bits - nblocks * block_size;
624 nb_samples = nblocks * 4096;
625 if (bits_left >= block_hdr_size)
626 nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch);
629 case AV_CODEC_ID_ADPCM_THP:
630 if (avctx->extradata) {
631 nb_samples = buf_size / (8 * ch) * 14;
634 has_coded_samples = 1;
635 bytestream2_skip(gb, 4); // channel size
636 *coded_samples = bytestream2_get_be32(gb);
637 *coded_samples -= *coded_samples % 14;
638 nb_samples = (buf_size - (8 + 36 * ch)) / (8 * ch) * 14;
640 case AV_CODEC_ID_ADPCM_AFC:
641 nb_samples = buf_size / (9 * ch) * 16;
643 case AV_CODEC_ID_ADPCM_XA:
644 nb_samples = (buf_size / 128) * 224 / ch;
646 case AV_CODEC_ID_ADPCM_DTK:
647 nb_samples = buf_size / (16 * ch) * 28;
651 /* validate coded sample count */
652 if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
653 return AVERROR_INVALIDDATA;
658 static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
659 int *got_frame_ptr, AVPacket *avpkt)
661 AVFrame *frame = data;
662 const uint8_t *buf = avpkt->data;
663 int buf_size = avpkt->size;
664 ADPCMDecodeContext *c = avctx->priv_data;
665 ADPCMChannelStatus *cs;
666 int n, m, channel, i;
671 int nb_samples, coded_samples, approx_nb_samples, ret;
674 bytestream2_init(&gb, buf, buf_size);
675 nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples, &approx_nb_samples);
676 if (nb_samples <= 0) {
677 av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
678 return AVERROR_INVALIDDATA;
681 /* get output buffer */
682 frame->nb_samples = nb_samples;
683 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
685 samples = (short *)frame->data[0];
686 samples_p = (int16_t **)frame->extended_data;
688 /* use coded_samples when applicable */
689 /* it is always <= nb_samples, so the output buffer will be large enough */
691 if (!approx_nb_samples && coded_samples != nb_samples)
692 av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
693 frame->nb_samples = nb_samples = coded_samples;
696 st = avctx->channels == 2 ? 1 : 0;
698 switch(avctx->codec->id) {
699 case AV_CODEC_ID_ADPCM_IMA_QT:
700 /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
701 Channel data is interleaved per-chunk. */
702 for (channel = 0; channel < avctx->channels; channel++) {
705 cs = &(c->status[channel]);
706 /* (pppppp) (piiiiiii) */
708 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
709 predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
710 step_index = predictor & 0x7F;
713 if (cs->step_index == step_index) {
714 int diff = predictor - cs->predictor;
721 cs->step_index = step_index;
722 cs->predictor = predictor;
725 if (cs->step_index > 88u){
726 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
727 channel, cs->step_index);
728 return AVERROR_INVALIDDATA;
731 samples = samples_p[channel];
733 for (m = 0; m < 64; m += 2) {
734 int byte = bytestream2_get_byteu(&gb);
735 samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F, 3);
736 samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 , 3);
740 case AV_CODEC_ID_ADPCM_IMA_WAV:
741 for(i=0; i<avctx->channels; i++){
742 cs = &(c->status[i]);
743 cs->predictor = samples_p[i][0] = sign_extend(bytestream2_get_le16u(&gb), 16);
745 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
746 if (cs->step_index > 88u){
747 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
749 return AVERROR_INVALIDDATA;
753 if (avctx->bits_per_coded_sample != 4) {
754 int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
757 init_get_bits8(&g, gb.buffer, bytestream2_get_bytes_left(&gb));
758 for (n = 0; n < (nb_samples - 1) / samples_per_block; n++) {
759 for (i = 0; i < avctx->channels; i++) {
761 samples = &samples_p[i][1 + n * samples_per_block];
762 for (m = 0; m < samples_per_block; m++) {
763 samples[m] = adpcm_ima_wav_expand_nibble(cs, &g,
764 avctx->bits_per_coded_sample);
768 bytestream2_skip(&gb, avctx->block_align - avctx->channels * 4);
770 for (n = 0; n < (nb_samples - 1) / 8; n++) {
771 for (i = 0; i < avctx->channels; i++) {
773 samples = &samples_p[i][1 + n * 8];
774 for (m = 0; m < 8; m += 2) {
775 int v = bytestream2_get_byteu(&gb);
776 samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
777 samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
783 case AV_CODEC_ID_ADPCM_4XM:
784 for (i = 0; i < avctx->channels; i++)
785 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
787 for (i = 0; i < avctx->channels; i++) {
788 c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
789 if (c->status[i].step_index > 88u) {
790 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
791 i, c->status[i].step_index);
792 return AVERROR_INVALIDDATA;
796 for (i = 0; i < avctx->channels; i++) {
797 samples = (int16_t *)frame->data[i];
799 for (n = nb_samples >> 1; n > 0; n--) {
800 int v = bytestream2_get_byteu(&gb);
801 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
802 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
806 case AV_CODEC_ID_ADPCM_MS:
810 block_predictor = bytestream2_get_byteu(&gb);
811 if (block_predictor > 6) {
812 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n",
814 return AVERROR_INVALIDDATA;
816 c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
817 c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
819 block_predictor = bytestream2_get_byteu(&gb);
820 if (block_predictor > 6) {
821 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n",
823 return AVERROR_INVALIDDATA;
825 c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
826 c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
828 c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
830 c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
833 c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
834 if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
835 c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
836 if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
838 *samples++ = c->status[0].sample2;
839 if (st) *samples++ = c->status[1].sample2;
840 *samples++ = c->status[0].sample1;
841 if (st) *samples++ = c->status[1].sample1;
842 for(n = (nb_samples - 2) >> (1 - st); n > 0; n--) {
843 int byte = bytestream2_get_byteu(&gb);
844 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 );
845 *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F);
849 case AV_CODEC_ID_ADPCM_IMA_DK4:
850 for (channel = 0; channel < avctx->channels; channel++) {
851 cs = &c->status[channel];
852 cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16);
853 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
854 if (cs->step_index > 88u){
855 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
856 channel, cs->step_index);
857 return AVERROR_INVALIDDATA;
860 for (n = (nb_samples - 1) >> (1 - st); n > 0; n--) {
861 int v = bytestream2_get_byteu(&gb);
862 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
863 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
866 case AV_CODEC_ID_ADPCM_IMA_DK3:
870 int decode_top_nibble_next = 0;
872 const int16_t *samples_end = samples + avctx->channels * nb_samples;
874 bytestream2_skipu(&gb, 10);
875 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
876 c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
877 c->status[0].step_index = bytestream2_get_byteu(&gb);
878 c->status[1].step_index = bytestream2_get_byteu(&gb);
879 if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){
880 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n",
881 c->status[0].step_index, c->status[1].step_index);
882 return AVERROR_INVALIDDATA;
884 /* sign extend the predictors */
885 diff_channel = c->status[1].predictor;
887 /* DK3 ADPCM support macro */
888 #define DK3_GET_NEXT_NIBBLE() \
889 if (decode_top_nibble_next) { \
890 nibble = last_byte >> 4; \
891 decode_top_nibble_next = 0; \
893 last_byte = bytestream2_get_byteu(&gb); \
894 nibble = last_byte & 0x0F; \
895 decode_top_nibble_next = 1; \
898 while (samples < samples_end) {
900 /* for this algorithm, c->status[0] is the sum channel and
901 * c->status[1] is the diff channel */
903 /* process the first predictor of the sum channel */
904 DK3_GET_NEXT_NIBBLE();
905 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
907 /* process the diff channel predictor */
908 DK3_GET_NEXT_NIBBLE();
909 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
911 /* process the first pair of stereo PCM samples */
912 diff_channel = (diff_channel + c->status[1].predictor) / 2;
913 *samples++ = c->status[0].predictor + c->status[1].predictor;
914 *samples++ = c->status[0].predictor - c->status[1].predictor;
916 /* process the second predictor of the sum channel */
917 DK3_GET_NEXT_NIBBLE();
918 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
920 /* process the second pair of stereo PCM samples */
921 diff_channel = (diff_channel + c->status[1].predictor) / 2;
922 *samples++ = c->status[0].predictor + c->status[1].predictor;
923 *samples++ = c->status[0].predictor - c->status[1].predictor;
926 if ((bytestream2_tell(&gb) & 1))
927 bytestream2_skip(&gb, 1);
930 case AV_CODEC_ID_ADPCM_IMA_ISS:
931 for (channel = 0; channel < avctx->channels; channel++) {
932 cs = &c->status[channel];
933 cs->predictor = 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;
942 for (n = nb_samples >> (1 - st); n > 0; n--) {
944 int v = bytestream2_get_byteu(&gb);
945 /* nibbles are swapped for mono */
953 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
954 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
957 case AV_CODEC_ID_ADPCM_IMA_APC:
958 while (bytestream2_get_bytes_left(&gb) > 0) {
959 int v = bytestream2_get_byteu(&gb);
960 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
961 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
964 case AV_CODEC_ID_ADPCM_IMA_OKI:
965 while (bytestream2_get_bytes_left(&gb) > 0) {
966 int v = bytestream2_get_byteu(&gb);
967 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 );
968 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F);
971 case AV_CODEC_ID_ADPCM_IMA_RAD:
972 for (channel = 0; channel < avctx->channels; channel++) {
973 cs = &c->status[channel];
974 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
975 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
976 if (cs->step_index > 88u){
977 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
978 channel, cs->step_index);
979 return AVERROR_INVALIDDATA;
982 for (n = 0; n < nb_samples / 2; n++) {
985 byte[0] = bytestream2_get_byteu(&gb);
987 byte[1] = bytestream2_get_byteu(&gb);
988 for(channel = 0; channel < avctx->channels; channel++) {
989 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] & 0x0F, 3);
991 for(channel = 0; channel < avctx->channels; channel++) {
992 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] >> 4 , 3);
996 case AV_CODEC_ID_ADPCM_IMA_WS:
997 if (c->vqa_version == 3) {
998 for (channel = 0; channel < avctx->channels; channel++) {
999 int16_t *smp = samples_p[channel];
1001 for (n = nb_samples / 2; n > 0; n--) {
1002 int v = bytestream2_get_byteu(&gb);
1003 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1004 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1008 for (n = nb_samples / 2; n > 0; n--) {
1009 for (channel = 0; channel < avctx->channels; channel++) {
1010 int v = bytestream2_get_byteu(&gb);
1011 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1012 samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1014 samples += avctx->channels;
1017 bytestream2_seek(&gb, 0, SEEK_END);
1019 case AV_CODEC_ID_ADPCM_XA:
1021 int16_t *out0 = samples_p[0];
1022 int16_t *out1 = samples_p[1];
1023 int samples_per_block = 28 * (3 - avctx->channels) * 4;
1024 int sample_offset = 0;
1025 while (bytestream2_get_bytes_left(&gb) >= 128) {
1026 if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb),
1027 &c->status[0], &c->status[1],
1028 avctx->channels, sample_offset)) < 0)
1030 bytestream2_skipu(&gb, 128);
1031 sample_offset += samples_per_block;
1035 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
1036 for (i=0; i<=st; i++) {
1037 c->status[i].step_index = bytestream2_get_le32u(&gb);
1038 if (c->status[i].step_index > 88u) {
1039 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1040 i, c->status[i].step_index);
1041 return AVERROR_INVALIDDATA;
1044 for (i=0; i<=st; i++)
1045 c->status[i].predictor = bytestream2_get_le32u(&gb);
1047 for (n = nb_samples >> (1 - st); n > 0; n--) {
1048 int byte = bytestream2_get_byteu(&gb);
1049 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3);
1050 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3);
1053 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1054 for (n = nb_samples >> (1 - st); n > 0; n--) {
1055 int byte = bytestream2_get_byteu(&gb);
1056 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6);
1057 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6);
1060 case AV_CODEC_ID_ADPCM_EA:
1062 int previous_left_sample, previous_right_sample;
1063 int current_left_sample, current_right_sample;
1064 int next_left_sample, next_right_sample;
1065 int coeff1l, coeff2l, coeff1r, coeff2r;
1066 int shift_left, shift_right;
1068 /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
1069 each coding 28 stereo samples. */
1071 if(avctx->channels != 2)
1072 return AVERROR_INVALIDDATA;
1074 current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1075 previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1076 current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1077 previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1079 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1080 int byte = bytestream2_get_byteu(&gb);
1081 coeff1l = ea_adpcm_table[ byte >> 4 ];
1082 coeff2l = ea_adpcm_table[(byte >> 4 ) + 4];
1083 coeff1r = ea_adpcm_table[ byte & 0x0F];
1084 coeff2r = ea_adpcm_table[(byte & 0x0F) + 4];
1086 byte = bytestream2_get_byteu(&gb);
1087 shift_left = 20 - (byte >> 4);
1088 shift_right = 20 - (byte & 0x0F);
1090 for (count2 = 0; count2 < 28; count2++) {
1091 byte = bytestream2_get_byteu(&gb);
1092 next_left_sample = sign_extend(byte >> 4, 4) << shift_left;
1093 next_right_sample = sign_extend(byte, 4) << shift_right;
1095 next_left_sample = (next_left_sample +
1096 (current_left_sample * coeff1l) +
1097 (previous_left_sample * coeff2l) + 0x80) >> 8;
1098 next_right_sample = (next_right_sample +
1099 (current_right_sample * coeff1r) +
1100 (previous_right_sample * coeff2r) + 0x80) >> 8;
1102 previous_left_sample = current_left_sample;
1103 current_left_sample = av_clip_int16(next_left_sample);
1104 previous_right_sample = current_right_sample;
1105 current_right_sample = av_clip_int16(next_right_sample);
1106 *samples++ = current_left_sample;
1107 *samples++ = current_right_sample;
1111 bytestream2_skip(&gb, 2); // Skip terminating 0x0000
1115 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
1117 int coeff[2][2], shift[2];
1119 for(channel = 0; channel < avctx->channels; channel++) {
1120 int byte = bytestream2_get_byteu(&gb);
1122 coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i];
1123 shift[channel] = 20 - (byte & 0x0F);
1125 for (count1 = 0; count1 < nb_samples / 2; count1++) {
1128 byte[0] = bytestream2_get_byteu(&gb);
1129 if (st) byte[1] = bytestream2_get_byteu(&gb);
1130 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1131 for(channel = 0; channel < avctx->channels; channel++) {
1132 int sample = sign_extend(byte[channel] >> i, 4) << shift[channel];
1134 c->status[channel].sample1 * coeff[channel][0] +
1135 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1136 c->status[channel].sample2 = c->status[channel].sample1;
1137 c->status[channel].sample1 = av_clip_int16(sample);
1138 *samples++ = c->status[channel].sample1;
1142 bytestream2_seek(&gb, 0, SEEK_END);
1145 case AV_CODEC_ID_ADPCM_EA_R1:
1146 case AV_CODEC_ID_ADPCM_EA_R2:
1147 case AV_CODEC_ID_ADPCM_EA_R3: {
1148 /* channel numbering
1150 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1151 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1152 const int big_endian = avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R3;
1153 int previous_sample, current_sample, next_sample;
1156 unsigned int channel;
1161 for (channel=0; channel<avctx->channels; channel++)
1162 offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) :
1163 bytestream2_get_le32(&gb)) +
1164 (avctx->channels + 1) * 4;
1166 for (channel=0; channel<avctx->channels; channel++) {
1167 bytestream2_seek(&gb, offsets[channel], SEEK_SET);
1168 samplesC = samples_p[channel];
1170 if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) {
1171 current_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1172 previous_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1174 current_sample = c->status[channel].predictor;
1175 previous_sample = c->status[channel].prev_sample;
1178 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1179 int byte = bytestream2_get_byte(&gb);
1180 if (byte == 0xEE) { /* only seen in R2 and R3 */
1181 current_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1182 previous_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1184 for (count2=0; count2<28; count2++)
1185 *samplesC++ = sign_extend(bytestream2_get_be16(&gb), 16);
1187 coeff1 = ea_adpcm_table[ byte >> 4 ];
1188 coeff2 = ea_adpcm_table[(byte >> 4) + 4];
1189 shift = 20 - (byte & 0x0F);
1191 for (count2=0; count2<28; count2++) {
1193 next_sample = sign_extend(byte, 4) << shift;
1195 byte = bytestream2_get_byte(&gb);
1196 next_sample = sign_extend(byte >> 4, 4) << shift;
1199 next_sample += (current_sample * coeff1) +
1200 (previous_sample * coeff2);
1201 next_sample = av_clip_int16(next_sample >> 8);
1203 previous_sample = current_sample;
1204 current_sample = next_sample;
1205 *samplesC++ = current_sample;
1211 } else if (count != count1) {
1212 av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
1213 count = FFMAX(count, count1);
1216 if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) {
1217 c->status[channel].predictor = current_sample;
1218 c->status[channel].prev_sample = previous_sample;
1222 frame->nb_samples = count * 28;
1223 bytestream2_seek(&gb, 0, SEEK_END);
1226 case AV_CODEC_ID_ADPCM_EA_XAS:
1227 for (channel=0; channel<avctx->channels; channel++) {
1228 int coeff[2][4], shift[4];
1229 int16_t *s = samples_p[channel];
1230 for (n = 0; n < 4; n++, s += 32) {
1231 int val = sign_extend(bytestream2_get_le16u(&gb), 16);
1233 coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i];
1236 val = sign_extend(bytestream2_get_le16u(&gb), 16);
1237 shift[n] = 20 - (val & 0x0F);
1241 for (m=2; m<32; m+=2) {
1242 s = &samples_p[channel][m];
1243 for (n = 0; n < 4; n++, s += 32) {
1245 int byte = bytestream2_get_byteu(&gb);
1247 level = sign_extend(byte >> 4, 4) << shift[n];
1248 pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n];
1249 s[0] = av_clip_int16((level + pred + 0x80) >> 8);
1251 level = sign_extend(byte, 4) << shift[n];
1252 pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n];
1253 s[1] = av_clip_int16((level + pred + 0x80) >> 8);
1258 case AV_CODEC_ID_ADPCM_IMA_AMV:
1259 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1260 c->status[0].step_index = bytestream2_get_le16u(&gb);
1261 bytestream2_skipu(&gb, 4);
1262 if (c->status[0].step_index > 88u) {
1263 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1264 c->status[0].step_index);
1265 return AVERROR_INVALIDDATA;
1268 for (n = nb_samples >> (1 - st); n > 0; n--) {
1269 int v = bytestream2_get_byteu(&gb);
1271 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3);
1272 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3);
1275 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1276 for (i = 0; i < avctx->channels; i++) {
1277 c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
1278 c->status[i].step_index = bytestream2_get_byteu(&gb);
1279 bytestream2_skipu(&gb, 1);
1280 if (c->status[i].step_index > 88u) {
1281 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1282 c->status[i].step_index);
1283 return AVERROR_INVALIDDATA;
1287 for (n = nb_samples >> (1 - st); n > 0; n--) {
1288 int v = bytestream2_get_byteu(&gb);
1290 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4, 3);
1291 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf, 3);
1294 case AV_CODEC_ID_ADPCM_CT:
1295 for (n = nb_samples >> (1 - st); n > 0; n--) {
1296 int v = bytestream2_get_byteu(&gb);
1297 *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
1298 *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
1301 case AV_CODEC_ID_ADPCM_SBPRO_4:
1302 case AV_CODEC_ID_ADPCM_SBPRO_3:
1303 case AV_CODEC_ID_ADPCM_SBPRO_2:
1304 if (!c->status[0].step_index) {
1305 /* the first byte is a raw sample */
1306 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1308 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1309 c->status[0].step_index = 1;
1312 if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) {
1313 for (n = nb_samples >> (1 - st); n > 0; n--) {
1314 int byte = bytestream2_get_byteu(&gb);
1315 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1317 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1320 } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) {
1321 for (n = (nb_samples<<st) / 3; n > 0; n--) {
1322 int byte = bytestream2_get_byteu(&gb);
1323 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1325 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1326 (byte >> 2) & 0x07, 3, 0);
1327 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1331 for (n = nb_samples >> (2 - st); n > 0; n--) {
1332 int byte = bytestream2_get_byteu(&gb);
1333 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1335 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1336 (byte >> 4) & 0x03, 2, 2);
1337 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1338 (byte >> 2) & 0x03, 2, 2);
1339 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1344 case AV_CODEC_ID_ADPCM_SWF:
1345 adpcm_swf_decode(avctx, buf, buf_size, samples);
1346 bytestream2_seek(&gb, 0, SEEK_END);
1348 case AV_CODEC_ID_ADPCM_YAMAHA:
1349 for (n = nb_samples >> (1 - st); n > 0; n--) {
1350 int v = bytestream2_get_byteu(&gb);
1351 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
1352 *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
1355 case AV_CODEC_ID_ADPCM_AFC:
1357 int samples_per_block;
1360 if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) {
1361 samples_per_block = avctx->extradata[0] / 16;
1362 blocks = nb_samples / avctx->extradata[0];
1364 samples_per_block = nb_samples / 16;
1368 for (m = 0; m < blocks; m++) {
1369 for (channel = 0; channel < avctx->channels; channel++) {
1370 int prev1 = c->status[channel].sample1;
1371 int prev2 = c->status[channel].sample2;
1373 samples = samples_p[channel] + m * 16;
1374 /* Read in every sample for this channel. */
1375 for (i = 0; i < samples_per_block; i++) {
1376 int byte = bytestream2_get_byteu(&gb);
1377 int scale = 1 << (byte >> 4);
1378 int index = byte & 0xf;
1379 int factor1 = ff_adpcm_afc_coeffs[0][index];
1380 int factor2 = ff_adpcm_afc_coeffs[1][index];
1382 /* Decode 16 samples. */
1383 for (n = 0; n < 16; n++) {
1387 sampledat = sign_extend(byte, 4);
1389 byte = bytestream2_get_byteu(&gb);
1390 sampledat = sign_extend(byte >> 4, 4);
1393 sampledat = ((prev1 * factor1 + prev2 * factor2) +
1394 ((sampledat * scale) << 11)) >> 11;
1395 *samples = av_clip_int16(sampledat);
1401 c->status[channel].sample1 = prev1;
1402 c->status[channel].sample2 = prev2;
1405 bytestream2_seek(&gb, 0, SEEK_END);
1408 case AV_CODEC_ID_ADPCM_THP:
1413 if (avctx->extradata) {
1415 if (avctx->extradata_size < 32 * avctx->channels) {
1416 av_log(avctx, AV_LOG_ERROR, "Missing coeff table\n");
1417 return AVERROR_INVALIDDATA;
1420 bytestream2_init(&tb, avctx->extradata, avctx->extradata_size);
1421 for (i = 0; i < avctx->channels; i++)
1422 for (n = 0; n < 16; n++)
1423 table[i][n] = sign_extend(bytestream2_get_be16u(&tb), 16);
1425 for (i = 0; i < avctx->channels; i++)
1426 for (n = 0; n < 16; n++)
1427 table[i][n] = sign_extend(bytestream2_get_be16u(&gb), 16);
1429 /* Initialize the previous sample. */
1430 for (i = 0; i < avctx->channels; i++) {
1431 c->status[i].sample1 = sign_extend(bytestream2_get_be16u(&gb), 16);
1432 c->status[i].sample2 = sign_extend(bytestream2_get_be16u(&gb), 16);
1436 for (ch = 0; ch < avctx->channels; ch++) {
1437 samples = samples_p[ch];
1439 /* Read in every sample for this channel. */
1440 for (i = 0; i < nb_samples / 14; i++) {
1441 int byte = bytestream2_get_byteu(&gb);
1442 int index = (byte >> 4) & 7;
1443 unsigned int exp = byte & 0x0F;
1444 int factor1 = table[ch][index * 2];
1445 int factor2 = table[ch][index * 2 + 1];
1447 /* Decode 14 samples. */
1448 for (n = 0; n < 14; n++) {
1452 sampledat = sign_extend(byte, 4);
1454 byte = bytestream2_get_byteu(&gb);
1455 sampledat = sign_extend(byte >> 4, 4);
1458 sampledat = ((c->status[ch].sample1 * factor1
1459 + c->status[ch].sample2 * factor2) >> 11) + (sampledat << exp);
1460 *samples = av_clip_int16(sampledat);
1461 c->status[ch].sample2 = c->status[ch].sample1;
1462 c->status[ch].sample1 = *samples++;
1468 case AV_CODEC_ID_ADPCM_DTK:
1469 for (channel = 0; channel < avctx->channels; channel++) {
1470 samples = samples_p[channel];
1472 /* Read in every sample for this channel. */
1473 for (i = 0; i < nb_samples / 28; i++) {
1476 bytestream2_skipu(&gb, 1);
1477 header = bytestream2_get_byteu(&gb);
1478 bytestream2_skipu(&gb, 3 - channel);
1480 /* Decode 28 samples. */
1481 for (n = 0; n < 28; n++) {
1482 int32_t sampledat, prev;
1484 switch (header >> 4) {
1486 prev = (c->status[channel].sample1 * 0x3c);
1489 prev = (c->status[channel].sample1 * 0x73) - (c->status[channel].sample2 * 0x34);
1492 prev = (c->status[channel].sample1 * 0x62) - (c->status[channel].sample2 * 0x37);
1498 prev = av_clip((prev + 0x20) >> 6, -0x200000, 0x1fffff);
1500 byte = bytestream2_get_byteu(&gb);
1502 sampledat = sign_extend(byte, 4);
1504 sampledat = sign_extend(byte >> 4, 4);
1506 sampledat = (((sampledat << 12) >> (header & 0xf)) << 6) + prev;
1507 *samples++ = av_clip_int16(sampledat >> 6);
1508 c->status[channel].sample2 = c->status[channel].sample1;
1509 c->status[channel].sample1 = sampledat;
1513 bytestream2_seek(&gb, 0, SEEK_SET);
1521 if (avpkt->size && bytestream2_tell(&gb) == 0) {
1522 av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n");
1523 return AVERROR_INVALIDDATA;
1528 return bytestream2_tell(&gb);
1532 static const enum AVSampleFormat sample_fmts_s16[] = { AV_SAMPLE_FMT_S16,
1533 AV_SAMPLE_FMT_NONE };
1534 static const enum AVSampleFormat sample_fmts_s16p[] = { AV_SAMPLE_FMT_S16,
1535 AV_SAMPLE_FMT_NONE };
1536 static const enum AVSampleFormat sample_fmts_both[] = { AV_SAMPLE_FMT_S16,
1538 AV_SAMPLE_FMT_NONE };
1540 #define ADPCM_DECODER(id_, sample_fmts_, name_, long_name_) \
1541 AVCodec ff_ ## name_ ## _decoder = { \
1543 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1544 .type = AVMEDIA_TYPE_AUDIO, \
1546 .priv_data_size = sizeof(ADPCMDecodeContext), \
1547 .init = adpcm_decode_init, \
1548 .decode = adpcm_decode_frame, \
1549 .capabilities = CODEC_CAP_DR1, \
1550 .sample_fmts = sample_fmts_, \
1553 /* Note: Do not forget to add new entries to the Makefile as well. */
1554 ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie");
1555 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC");
1556 ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology");
1557 ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK");
1558 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts");
1559 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
1560 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1");
1561 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2");
1562 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3");
1563 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
1564 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV");
1565 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC");
1566 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
1567 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
1568 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
1569 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
1570 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
1571 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI");
1572 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime");
1573 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical");
1574 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
1575 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV");
1576 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood");
1577 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MS, sample_fmts_s16, adpcm_ms, "ADPCM Microsoft");
1578 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
1579 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
1580 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
1581 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash");
1582 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo Gamecube THP");
1583 ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA");
1584 ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha");