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[10];
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:
109 case AV_CODEC_ID_ADPCM_THP:
110 case AV_CODEC_ID_ADPCM_THP_LE:
114 if (avctx->channels < min_channels || avctx->channels > max_channels) {
115 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
116 return AVERROR(EINVAL);
119 switch(avctx->codec->id) {
120 case AV_CODEC_ID_ADPCM_CT:
121 c->status[0].step = c->status[1].step = 511;
123 case AV_CODEC_ID_ADPCM_IMA_WAV:
124 if (avctx->bits_per_coded_sample < 2 || avctx->bits_per_coded_sample > 5)
125 return AVERROR_INVALIDDATA;
127 case AV_CODEC_ID_ADPCM_IMA_APC:
128 if (avctx->extradata && avctx->extradata_size >= 8) {
129 c->status[0].predictor = AV_RL32(avctx->extradata);
130 c->status[1].predictor = AV_RL32(avctx->extradata + 4);
133 case AV_CODEC_ID_ADPCM_IMA_WS:
134 if (avctx->extradata && avctx->extradata_size >= 2)
135 c->vqa_version = AV_RL16(avctx->extradata);
141 switch(avctx->codec->id) {
142 case AV_CODEC_ID_ADPCM_IMA_QT:
143 case AV_CODEC_ID_ADPCM_IMA_WAV:
144 case AV_CODEC_ID_ADPCM_4XM:
145 case AV_CODEC_ID_ADPCM_XA:
146 case AV_CODEC_ID_ADPCM_EA_R1:
147 case AV_CODEC_ID_ADPCM_EA_R2:
148 case AV_CODEC_ID_ADPCM_EA_R3:
149 case AV_CODEC_ID_ADPCM_EA_XAS:
150 case AV_CODEC_ID_ADPCM_THP:
151 case AV_CODEC_ID_ADPCM_THP_LE:
152 case AV_CODEC_ID_ADPCM_AFC:
153 case AV_CODEC_ID_ADPCM_DTK:
154 avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
156 case AV_CODEC_ID_ADPCM_IMA_WS:
157 avctx->sample_fmt = c->vqa_version == 3 ? AV_SAMPLE_FMT_S16P :
161 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
167 static inline short adpcm_ima_expand_nibble(ADPCMChannelStatus *c, char nibble, int shift)
171 int sign, delta, diff, step;
173 step = ff_adpcm_step_table[c->step_index];
174 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
175 step_index = av_clip(step_index, 0, 88);
179 /* perform direct multiplication instead of series of jumps proposed by
180 * the reference ADPCM implementation since modern CPUs can do the mults
182 diff = ((2 * delta + 1) * step) >> shift;
183 predictor = c->predictor;
184 if (sign) predictor -= diff;
185 else predictor += diff;
187 c->predictor = av_clip_int16(predictor);
188 c->step_index = step_index;
190 return (short)c->predictor;
193 static inline int16_t adpcm_ima_wav_expand_nibble(ADPCMChannelStatus *c, GetBitContext *gb, int bps)
195 int nibble, step_index, predictor, sign, delta, diff, step, shift;
198 nibble = get_bits_le(gb, bps),
199 step = ff_adpcm_step_table[c->step_index];
200 step_index = c->step_index + ff_adpcm_index_tables[bps - 2][nibble];
201 step_index = av_clip(step_index, 0, 88);
203 sign = nibble & (1 << shift);
204 delta = av_mod_uintp2(nibble, shift);
205 diff = ((2 * delta + 1) * step) >> shift;
206 predictor = c->predictor;
207 if (sign) predictor -= diff;
208 else predictor += diff;
210 c->predictor = av_clip_int16(predictor);
211 c->step_index = step_index;
213 return (int16_t)c->predictor;
216 static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble, int shift)
222 step = ff_adpcm_step_table[c->step_index];
223 step_index = c->step_index + ff_adpcm_index_table[nibble];
224 step_index = av_clip(step_index, 0, 88);
227 if (nibble & 4) diff += step;
228 if (nibble & 2) diff += step >> 1;
229 if (nibble & 1) diff += step >> 2;
232 predictor = c->predictor - diff;
234 predictor = c->predictor + diff;
236 c->predictor = av_clip_int16(predictor);
237 c->step_index = step_index;
242 static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble)
246 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
247 predictor += ((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
249 c->sample2 = c->sample1;
250 c->sample1 = av_clip_int16(predictor);
251 c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8;
252 if (c->idelta < 16) c->idelta = 16;
253 if (c->idelta > INT_MAX/768) {
254 av_log(NULL, AV_LOG_WARNING, "idelta overflow\n");
255 c->idelta = INT_MAX/768;
261 static inline short adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble)
263 int step_index, predictor, sign, delta, diff, step;
265 step = ff_adpcm_oki_step_table[c->step_index];
266 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
267 step_index = av_clip(step_index, 0, 48);
271 diff = ((2 * delta + 1) * step) >> 3;
272 predictor = c->predictor;
273 if (sign) predictor -= diff;
274 else predictor += diff;
276 c->predictor = av_clip_intp2(predictor, 11);
277 c->step_index = step_index;
279 return c->predictor << 4;
282 static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
284 int sign, delta, diff;
289 /* perform direct multiplication instead of series of jumps proposed by
290 * the reference ADPCM implementation since modern CPUs can do the mults
292 diff = ((2 * delta + 1) * c->step) >> 3;
293 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
294 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
295 c->predictor = av_clip_int16(c->predictor);
296 /* calculate new step and clamp it to range 511..32767 */
297 new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
298 c->step = av_clip(new_step, 511, 32767);
300 return (short)c->predictor;
303 static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble, int size, int shift)
305 int sign, delta, diff;
307 sign = nibble & (1<<(size-1));
308 delta = nibble & ((1<<(size-1))-1);
309 diff = delta << (7 + c->step + shift);
312 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
314 /* calculate new step */
315 if (delta >= (2*size - 3) && c->step < 3)
317 else if (delta == 0 && c->step > 0)
320 return (short) c->predictor;
323 static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned char nibble)
330 c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
331 c->predictor = av_clip_int16(c->predictor);
332 c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
333 c->step = av_clip(c->step, 127, 24567);
337 static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1,
338 const uint8_t *in, ADPCMChannelStatus *left,
339 ADPCMChannelStatus *right, int channels, int sample_offset)
342 int shift,filter,f0,f1;
346 out0 += sample_offset;
350 out1 += sample_offset;
353 shift = 12 - (in[4+i*2] & 15);
354 filter = in[4+i*2] >> 4;
355 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
356 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
359 f0 = xa_adpcm_table[filter][0];
360 f1 = xa_adpcm_table[filter][1];
368 t = sign_extend(d, 4);
369 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
371 s_1 = av_clip_int16(s);
378 s_1 = right->sample1;
379 s_2 = right->sample2;
382 shift = 12 - (in[5+i*2] & 15);
383 filter = in[5+i*2] >> 4;
384 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
385 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
389 f0 = xa_adpcm_table[filter][0];
390 f1 = xa_adpcm_table[filter][1];
395 t = sign_extend(d >> 4, 4);
396 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
398 s_1 = av_clip_int16(s);
403 right->sample1 = s_1;
404 right->sample2 = s_2;
410 out0 += 28 * (3 - channels);
411 out1 += 28 * (3 - channels);
417 static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples)
419 ADPCMDecodeContext *c = avctx->priv_data;
422 int k0, signmask, nb_bits, count;
423 int size = buf_size*8;
426 init_get_bits(&gb, buf, size);
428 //read bits & initial values
429 nb_bits = get_bits(&gb, 2)+2;
430 table = swf_index_tables[nb_bits-2];
431 k0 = 1 << (nb_bits-2);
432 signmask = 1 << (nb_bits-1);
434 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
435 for (i = 0; i < avctx->channels; i++) {
436 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
437 c->status[i].step_index = get_bits(&gb, 6);
440 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
443 for (i = 0; i < avctx->channels; i++) {
444 // similar to IMA adpcm
445 int delta = get_bits(&gb, nb_bits);
446 int step = ff_adpcm_step_table[c->status[i].step_index];
447 long vpdiff = 0; // vpdiff = (delta+0.5)*step/4
458 if (delta & signmask)
459 c->status[i].predictor -= vpdiff;
461 c->status[i].predictor += vpdiff;
463 c->status[i].step_index += table[delta & (~signmask)];
465 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
466 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
468 *samples++ = c->status[i].predictor;
475 * Get the number of samples that will be decoded from the packet.
476 * In one case, this is actually the maximum number of samples possible to
477 * decode with the given buf_size.
479 * @param[out] coded_samples set to the number of samples as coded in the
480 * packet, or 0 if the codec does not encode the
481 * number of samples in each frame.
482 * @param[out] approx_nb_samples set to non-zero if the number of samples
483 * returned is an approximation.
485 static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
486 int buf_size, int *coded_samples, int *approx_nb_samples)
488 ADPCMDecodeContext *s = avctx->priv_data;
490 int ch = avctx->channels;
491 int has_coded_samples = 0;
495 *approx_nb_samples = 0;
500 switch (avctx->codec->id) {
501 /* constant, only check buf_size */
502 case AV_CODEC_ID_ADPCM_EA_XAS:
503 if (buf_size < 76 * ch)
507 case AV_CODEC_ID_ADPCM_IMA_QT:
508 if (buf_size < 34 * ch)
512 /* simple 4-bit adpcm */
513 case AV_CODEC_ID_ADPCM_CT:
514 case AV_CODEC_ID_ADPCM_IMA_APC:
515 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
516 case AV_CODEC_ID_ADPCM_IMA_OKI:
517 case AV_CODEC_ID_ADPCM_IMA_WS:
518 case AV_CODEC_ID_ADPCM_YAMAHA:
519 nb_samples = buf_size * 2 / ch;
525 /* simple 4-bit adpcm, with header */
527 switch (avctx->codec->id) {
528 case AV_CODEC_ID_ADPCM_4XM:
529 case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
530 case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break;
531 case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break;
534 return (buf_size - header_size) * 2 / ch;
536 /* more complex formats */
537 switch (avctx->codec->id) {
538 case AV_CODEC_ID_ADPCM_EA:
539 has_coded_samples = 1;
540 *coded_samples = bytestream2_get_le32(gb);
541 *coded_samples -= *coded_samples % 28;
542 nb_samples = (buf_size - 12) / 30 * 28;
544 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
545 has_coded_samples = 1;
546 *coded_samples = bytestream2_get_le32(gb);
547 nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch;
549 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
550 nb_samples = (buf_size - ch) / ch * 2;
552 case AV_CODEC_ID_ADPCM_EA_R1:
553 case AV_CODEC_ID_ADPCM_EA_R2:
554 case AV_CODEC_ID_ADPCM_EA_R3:
555 /* maximum number of samples */
556 /* has internal offsets and a per-frame switch to signal raw 16-bit */
557 has_coded_samples = 1;
558 switch (avctx->codec->id) {
559 case AV_CODEC_ID_ADPCM_EA_R1:
560 header_size = 4 + 9 * ch;
561 *coded_samples = bytestream2_get_le32(gb);
563 case AV_CODEC_ID_ADPCM_EA_R2:
564 header_size = 4 + 5 * ch;
565 *coded_samples = bytestream2_get_le32(gb);
567 case AV_CODEC_ID_ADPCM_EA_R3:
568 header_size = 4 + 5 * ch;
569 *coded_samples = bytestream2_get_be32(gb);
572 *coded_samples -= *coded_samples % 28;
573 nb_samples = (buf_size - header_size) * 2 / ch;
574 nb_samples -= nb_samples % 28;
575 *approx_nb_samples = 1;
577 case AV_CODEC_ID_ADPCM_IMA_DK3:
578 if (avctx->block_align > 0)
579 buf_size = FFMIN(buf_size, avctx->block_align);
580 nb_samples = ((buf_size - 16) * 2 / 3 * 4) / ch;
582 case AV_CODEC_ID_ADPCM_IMA_DK4:
583 if (avctx->block_align > 0)
584 buf_size = FFMIN(buf_size, avctx->block_align);
585 if (buf_size < 4 * ch)
586 return AVERROR_INVALIDDATA;
587 nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch;
589 case AV_CODEC_ID_ADPCM_IMA_RAD:
590 if (avctx->block_align > 0)
591 buf_size = FFMIN(buf_size, avctx->block_align);
592 nb_samples = (buf_size - 4 * ch) * 2 / ch;
594 case AV_CODEC_ID_ADPCM_IMA_WAV:
596 int bsize = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
597 int bsamples = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
598 if (avctx->block_align > 0)
599 buf_size = FFMIN(buf_size, avctx->block_align);
600 if (buf_size < 4 * ch)
601 return AVERROR_INVALIDDATA;
602 nb_samples = 1 + (buf_size - 4 * ch) / (bsize * ch) * bsamples;
605 case AV_CODEC_ID_ADPCM_MS:
606 if (avctx->block_align > 0)
607 buf_size = FFMIN(buf_size, avctx->block_align);
608 nb_samples = (buf_size - 6 * ch) * 2 / ch;
610 case AV_CODEC_ID_ADPCM_SBPRO_2:
611 case AV_CODEC_ID_ADPCM_SBPRO_3:
612 case AV_CODEC_ID_ADPCM_SBPRO_4:
614 int samples_per_byte;
615 switch (avctx->codec->id) {
616 case AV_CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break;
617 case AV_CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break;
618 case AV_CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break;
620 if (!s->status[0].step_index) {
622 return AVERROR_INVALIDDATA;
626 nb_samples += buf_size * samples_per_byte / ch;
629 case AV_CODEC_ID_ADPCM_SWF:
631 int buf_bits = buf_size * 8 - 2;
632 int nbits = (bytestream2_get_byte(gb) >> 6) + 2;
633 int block_hdr_size = 22 * ch;
634 int block_size = block_hdr_size + nbits * ch * 4095;
635 int nblocks = buf_bits / block_size;
636 int bits_left = buf_bits - nblocks * block_size;
637 nb_samples = nblocks * 4096;
638 if (bits_left >= block_hdr_size)
639 nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch);
642 case AV_CODEC_ID_ADPCM_THP:
643 case AV_CODEC_ID_ADPCM_THP_LE:
644 if (avctx->extradata) {
645 nb_samples = buf_size * 14 / (8 * ch);
648 has_coded_samples = 1;
649 bytestream2_skip(gb, 4); // channel size
650 *coded_samples = (avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE) ?
651 bytestream2_get_le32(gb) :
652 bytestream2_get_be32(gb);
653 buf_size -= 8 + 36 * ch;
655 nb_samples = buf_size / 8 * 14;
656 if (buf_size % 8 > 1) {
657 nb_samples += (buf_size % 8 - 1) * 2;
658 if (*coded_samples & 1)
662 case AV_CODEC_ID_ADPCM_AFC:
663 nb_samples = buf_size / (9 * ch) * 16;
665 case AV_CODEC_ID_ADPCM_XA:
666 nb_samples = (buf_size / 128) * 224 / ch;
668 case AV_CODEC_ID_ADPCM_DTK:
669 nb_samples = buf_size / (16 * ch) * 28;
673 /* validate coded sample count */
674 if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
675 return AVERROR_INVALIDDATA;
680 static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
681 int *got_frame_ptr, AVPacket *avpkt)
683 AVFrame *frame = data;
684 const uint8_t *buf = avpkt->data;
685 int buf_size = avpkt->size;
686 ADPCMDecodeContext *c = avctx->priv_data;
687 ADPCMChannelStatus *cs;
688 int n, m, channel, i;
693 int nb_samples, coded_samples, approx_nb_samples, ret;
696 bytestream2_init(&gb, buf, buf_size);
697 nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples, &approx_nb_samples);
698 if (nb_samples <= 0) {
699 av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
700 return AVERROR_INVALIDDATA;
703 /* get output buffer */
704 frame->nb_samples = nb_samples;
705 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
707 samples = (short *)frame->data[0];
708 samples_p = (int16_t **)frame->extended_data;
710 /* use coded_samples when applicable */
711 /* it is always <= nb_samples, so the output buffer will be large enough */
713 if (!approx_nb_samples && coded_samples != nb_samples)
714 av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
715 frame->nb_samples = nb_samples = coded_samples;
718 st = avctx->channels == 2 ? 1 : 0;
720 switch(avctx->codec->id) {
721 case AV_CODEC_ID_ADPCM_IMA_QT:
722 /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
723 Channel data is interleaved per-chunk. */
724 for (channel = 0; channel < avctx->channels; channel++) {
727 cs = &(c->status[channel]);
728 /* (pppppp) (piiiiiii) */
730 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
731 predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
732 step_index = predictor & 0x7F;
735 if (cs->step_index == step_index) {
736 int diff = predictor - cs->predictor;
743 cs->step_index = step_index;
744 cs->predictor = predictor;
747 if (cs->step_index > 88u){
748 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
749 channel, cs->step_index);
750 return AVERROR_INVALIDDATA;
753 samples = samples_p[channel];
755 for (m = 0; m < 64; m += 2) {
756 int byte = bytestream2_get_byteu(&gb);
757 samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F, 3);
758 samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 , 3);
762 case AV_CODEC_ID_ADPCM_IMA_WAV:
763 for(i=0; i<avctx->channels; i++){
764 cs = &(c->status[i]);
765 cs->predictor = samples_p[i][0] = sign_extend(bytestream2_get_le16u(&gb), 16);
767 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
768 if (cs->step_index > 88u){
769 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
771 return AVERROR_INVALIDDATA;
775 if (avctx->bits_per_coded_sample != 4) {
776 int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
779 init_get_bits8(&g, gb.buffer, bytestream2_get_bytes_left(&gb));
780 for (n = 0; n < (nb_samples - 1) / samples_per_block; n++) {
781 for (i = 0; i < avctx->channels; i++) {
783 samples = &samples_p[i][1 + n * samples_per_block];
784 for (m = 0; m < samples_per_block; m++) {
785 samples[m] = adpcm_ima_wav_expand_nibble(cs, &g,
786 avctx->bits_per_coded_sample);
790 bytestream2_skip(&gb, avctx->block_align - avctx->channels * 4);
792 for (n = 0; n < (nb_samples - 1) / 8; n++) {
793 for (i = 0; i < avctx->channels; i++) {
795 samples = &samples_p[i][1 + n * 8];
796 for (m = 0; m < 8; m += 2) {
797 int v = bytestream2_get_byteu(&gb);
798 samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
799 samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
805 case AV_CODEC_ID_ADPCM_4XM:
806 for (i = 0; i < avctx->channels; i++)
807 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
809 for (i = 0; i < avctx->channels; i++) {
810 c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
811 if (c->status[i].step_index > 88u) {
812 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
813 i, c->status[i].step_index);
814 return AVERROR_INVALIDDATA;
818 for (i = 0; i < avctx->channels; i++) {
819 samples = (int16_t *)frame->data[i];
821 for (n = nb_samples >> 1; n > 0; n--) {
822 int v = bytestream2_get_byteu(&gb);
823 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
824 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
828 case AV_CODEC_ID_ADPCM_MS:
832 block_predictor = bytestream2_get_byteu(&gb);
833 if (block_predictor > 6) {
834 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n",
836 return AVERROR_INVALIDDATA;
838 c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
839 c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
841 block_predictor = bytestream2_get_byteu(&gb);
842 if (block_predictor > 6) {
843 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n",
845 return AVERROR_INVALIDDATA;
847 c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
848 c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
850 c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
852 c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
855 c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
856 if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
857 c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
858 if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
860 *samples++ = c->status[0].sample2;
861 if (st) *samples++ = c->status[1].sample2;
862 *samples++ = c->status[0].sample1;
863 if (st) *samples++ = c->status[1].sample1;
864 for(n = (nb_samples - 2) >> (1 - st); n > 0; n--) {
865 int byte = bytestream2_get_byteu(&gb);
866 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 );
867 *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F);
871 case AV_CODEC_ID_ADPCM_IMA_DK4:
872 for (channel = 0; channel < avctx->channels; channel++) {
873 cs = &c->status[channel];
874 cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16);
875 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
876 if (cs->step_index > 88u){
877 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
878 channel, cs->step_index);
879 return AVERROR_INVALIDDATA;
882 for (n = (nb_samples - 1) >> (1 - st); n > 0; n--) {
883 int v = bytestream2_get_byteu(&gb);
884 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
885 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
888 case AV_CODEC_ID_ADPCM_IMA_DK3:
892 int decode_top_nibble_next = 0;
894 const int16_t *samples_end = samples + avctx->channels * nb_samples;
896 bytestream2_skipu(&gb, 10);
897 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
898 c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
899 c->status[0].step_index = bytestream2_get_byteu(&gb);
900 c->status[1].step_index = bytestream2_get_byteu(&gb);
901 if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){
902 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n",
903 c->status[0].step_index, c->status[1].step_index);
904 return AVERROR_INVALIDDATA;
906 /* sign extend the predictors */
907 diff_channel = c->status[1].predictor;
909 /* DK3 ADPCM support macro */
910 #define DK3_GET_NEXT_NIBBLE() \
911 if (decode_top_nibble_next) { \
912 nibble = last_byte >> 4; \
913 decode_top_nibble_next = 0; \
915 last_byte = bytestream2_get_byteu(&gb); \
916 nibble = last_byte & 0x0F; \
917 decode_top_nibble_next = 1; \
920 while (samples < samples_end) {
922 /* for this algorithm, c->status[0] is the sum channel and
923 * c->status[1] is the diff channel */
925 /* process the first predictor of the sum channel */
926 DK3_GET_NEXT_NIBBLE();
927 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
929 /* process the diff channel predictor */
930 DK3_GET_NEXT_NIBBLE();
931 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
933 /* process the first pair of stereo PCM samples */
934 diff_channel = (diff_channel + c->status[1].predictor) / 2;
935 *samples++ = c->status[0].predictor + c->status[1].predictor;
936 *samples++ = c->status[0].predictor - c->status[1].predictor;
938 /* process the second predictor of the sum channel */
939 DK3_GET_NEXT_NIBBLE();
940 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
942 /* process the second pair of stereo PCM samples */
943 diff_channel = (diff_channel + c->status[1].predictor) / 2;
944 *samples++ = c->status[0].predictor + c->status[1].predictor;
945 *samples++ = c->status[0].predictor - c->status[1].predictor;
948 if ((bytestream2_tell(&gb) & 1))
949 bytestream2_skip(&gb, 1);
952 case AV_CODEC_ID_ADPCM_IMA_ISS:
953 for (channel = 0; channel < avctx->channels; channel++) {
954 cs = &c->status[channel];
955 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
956 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
957 if (cs->step_index > 88u){
958 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
959 channel, cs->step_index);
960 return AVERROR_INVALIDDATA;
964 for (n = nb_samples >> (1 - st); n > 0; n--) {
966 int v = bytestream2_get_byteu(&gb);
967 /* nibbles are swapped for mono */
975 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
976 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
979 case AV_CODEC_ID_ADPCM_IMA_APC:
980 while (bytestream2_get_bytes_left(&gb) > 0) {
981 int v = bytestream2_get_byteu(&gb);
982 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
983 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
986 case AV_CODEC_ID_ADPCM_IMA_OKI:
987 while (bytestream2_get_bytes_left(&gb) > 0) {
988 int v = bytestream2_get_byteu(&gb);
989 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 );
990 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F);
993 case AV_CODEC_ID_ADPCM_IMA_RAD:
994 for (channel = 0; channel < avctx->channels; channel++) {
995 cs = &c->status[channel];
996 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
997 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
998 if (cs->step_index > 88u){
999 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1000 channel, cs->step_index);
1001 return AVERROR_INVALIDDATA;
1004 for (n = 0; n < nb_samples / 2; n++) {
1007 byte[0] = bytestream2_get_byteu(&gb);
1009 byte[1] = bytestream2_get_byteu(&gb);
1010 for(channel = 0; channel < avctx->channels; channel++) {
1011 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] & 0x0F, 3);
1013 for(channel = 0; channel < avctx->channels; channel++) {
1014 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] >> 4 , 3);
1018 case AV_CODEC_ID_ADPCM_IMA_WS:
1019 if (c->vqa_version == 3) {
1020 for (channel = 0; channel < avctx->channels; channel++) {
1021 int16_t *smp = samples_p[channel];
1023 for (n = nb_samples / 2; n > 0; n--) {
1024 int v = bytestream2_get_byteu(&gb);
1025 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1026 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1030 for (n = nb_samples / 2; n > 0; n--) {
1031 for (channel = 0; channel < avctx->channels; channel++) {
1032 int v = bytestream2_get_byteu(&gb);
1033 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1034 samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1036 samples += avctx->channels;
1039 bytestream2_seek(&gb, 0, SEEK_END);
1041 case AV_CODEC_ID_ADPCM_XA:
1043 int16_t *out0 = samples_p[0];
1044 int16_t *out1 = samples_p[1];
1045 int samples_per_block = 28 * (3 - avctx->channels) * 4;
1046 int sample_offset = 0;
1047 while (bytestream2_get_bytes_left(&gb) >= 128) {
1048 if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb),
1049 &c->status[0], &c->status[1],
1050 avctx->channels, sample_offset)) < 0)
1052 bytestream2_skipu(&gb, 128);
1053 sample_offset += samples_per_block;
1057 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
1058 for (i=0; i<=st; i++) {
1059 c->status[i].step_index = bytestream2_get_le32u(&gb);
1060 if (c->status[i].step_index > 88u) {
1061 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1062 i, c->status[i].step_index);
1063 return AVERROR_INVALIDDATA;
1066 for (i=0; i<=st; i++)
1067 c->status[i].predictor = bytestream2_get_le32u(&gb);
1069 for (n = nb_samples >> (1 - st); n > 0; n--) {
1070 int byte = bytestream2_get_byteu(&gb);
1071 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3);
1072 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3);
1075 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1076 for (n = nb_samples >> (1 - st); n > 0; n--) {
1077 int byte = bytestream2_get_byteu(&gb);
1078 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6);
1079 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6);
1082 case AV_CODEC_ID_ADPCM_EA:
1084 int previous_left_sample, previous_right_sample;
1085 int current_left_sample, current_right_sample;
1086 int next_left_sample, next_right_sample;
1087 int coeff1l, coeff2l, coeff1r, coeff2r;
1088 int shift_left, shift_right;
1090 /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
1091 each coding 28 stereo samples. */
1093 if(avctx->channels != 2)
1094 return AVERROR_INVALIDDATA;
1096 current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1097 previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1098 current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1099 previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1101 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1102 int byte = bytestream2_get_byteu(&gb);
1103 coeff1l = ea_adpcm_table[ byte >> 4 ];
1104 coeff2l = ea_adpcm_table[(byte >> 4 ) + 4];
1105 coeff1r = ea_adpcm_table[ byte & 0x0F];
1106 coeff2r = ea_adpcm_table[(byte & 0x0F) + 4];
1108 byte = bytestream2_get_byteu(&gb);
1109 shift_left = 20 - (byte >> 4);
1110 shift_right = 20 - (byte & 0x0F);
1112 for (count2 = 0; count2 < 28; count2++) {
1113 byte = bytestream2_get_byteu(&gb);
1114 next_left_sample = sign_extend(byte >> 4, 4) << shift_left;
1115 next_right_sample = sign_extend(byte, 4) << shift_right;
1117 next_left_sample = (next_left_sample +
1118 (current_left_sample * coeff1l) +
1119 (previous_left_sample * coeff2l) + 0x80) >> 8;
1120 next_right_sample = (next_right_sample +
1121 (current_right_sample * coeff1r) +
1122 (previous_right_sample * coeff2r) + 0x80) >> 8;
1124 previous_left_sample = current_left_sample;
1125 current_left_sample = av_clip_int16(next_left_sample);
1126 previous_right_sample = current_right_sample;
1127 current_right_sample = av_clip_int16(next_right_sample);
1128 *samples++ = current_left_sample;
1129 *samples++ = current_right_sample;
1133 bytestream2_skip(&gb, 2); // Skip terminating 0x0000
1137 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
1139 int coeff[2][2], shift[2];
1141 for(channel = 0; channel < avctx->channels; channel++) {
1142 int byte = bytestream2_get_byteu(&gb);
1144 coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i];
1145 shift[channel] = 20 - (byte & 0x0F);
1147 for (count1 = 0; count1 < nb_samples / 2; count1++) {
1150 byte[0] = bytestream2_get_byteu(&gb);
1151 if (st) byte[1] = bytestream2_get_byteu(&gb);
1152 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1153 for(channel = 0; channel < avctx->channels; channel++) {
1154 int sample = sign_extend(byte[channel] >> i, 4) << shift[channel];
1156 c->status[channel].sample1 * coeff[channel][0] +
1157 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1158 c->status[channel].sample2 = c->status[channel].sample1;
1159 c->status[channel].sample1 = av_clip_int16(sample);
1160 *samples++ = c->status[channel].sample1;
1164 bytestream2_seek(&gb, 0, SEEK_END);
1167 case AV_CODEC_ID_ADPCM_EA_R1:
1168 case AV_CODEC_ID_ADPCM_EA_R2:
1169 case AV_CODEC_ID_ADPCM_EA_R3: {
1170 /* channel numbering
1172 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1173 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1174 const int big_endian = avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R3;
1175 int previous_sample, current_sample, next_sample;
1178 unsigned int channel;
1183 for (channel=0; channel<avctx->channels; channel++)
1184 offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) :
1185 bytestream2_get_le32(&gb)) +
1186 (avctx->channels + 1) * 4;
1188 for (channel=0; channel<avctx->channels; channel++) {
1189 bytestream2_seek(&gb, offsets[channel], SEEK_SET);
1190 samplesC = samples_p[channel];
1192 if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) {
1193 current_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1194 previous_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1196 current_sample = c->status[channel].predictor;
1197 previous_sample = c->status[channel].prev_sample;
1200 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1201 int byte = bytestream2_get_byte(&gb);
1202 if (byte == 0xEE) { /* only seen in R2 and R3 */
1203 current_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1204 previous_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1206 for (count2=0; count2<28; count2++)
1207 *samplesC++ = sign_extend(bytestream2_get_be16(&gb), 16);
1209 coeff1 = ea_adpcm_table[ byte >> 4 ];
1210 coeff2 = ea_adpcm_table[(byte >> 4) + 4];
1211 shift = 20 - (byte & 0x0F);
1213 for (count2=0; count2<28; count2++) {
1215 next_sample = sign_extend(byte, 4) << shift;
1217 byte = bytestream2_get_byte(&gb);
1218 next_sample = sign_extend(byte >> 4, 4) << shift;
1221 next_sample += (current_sample * coeff1) +
1222 (previous_sample * coeff2);
1223 next_sample = av_clip_int16(next_sample >> 8);
1225 previous_sample = current_sample;
1226 current_sample = next_sample;
1227 *samplesC++ = current_sample;
1233 } else if (count != count1) {
1234 av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
1235 count = FFMAX(count, count1);
1238 if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) {
1239 c->status[channel].predictor = current_sample;
1240 c->status[channel].prev_sample = previous_sample;
1244 frame->nb_samples = count * 28;
1245 bytestream2_seek(&gb, 0, SEEK_END);
1248 case AV_CODEC_ID_ADPCM_EA_XAS:
1249 for (channel=0; channel<avctx->channels; channel++) {
1250 int coeff[2][4], shift[4];
1251 int16_t *s = samples_p[channel];
1252 for (n = 0; n < 4; n++, s += 32) {
1253 int val = sign_extend(bytestream2_get_le16u(&gb), 16);
1255 coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i];
1258 val = sign_extend(bytestream2_get_le16u(&gb), 16);
1259 shift[n] = 20 - (val & 0x0F);
1263 for (m=2; m<32; m+=2) {
1264 s = &samples_p[channel][m];
1265 for (n = 0; n < 4; n++, s += 32) {
1267 int byte = bytestream2_get_byteu(&gb);
1269 level = sign_extend(byte >> 4, 4) << shift[n];
1270 pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n];
1271 s[0] = av_clip_int16((level + pred + 0x80) >> 8);
1273 level = sign_extend(byte, 4) << shift[n];
1274 pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n];
1275 s[1] = av_clip_int16((level + pred + 0x80) >> 8);
1280 case AV_CODEC_ID_ADPCM_IMA_AMV:
1281 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1282 c->status[0].step_index = bytestream2_get_le16u(&gb);
1283 bytestream2_skipu(&gb, 4);
1284 if (c->status[0].step_index > 88u) {
1285 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1286 c->status[0].step_index);
1287 return AVERROR_INVALIDDATA;
1290 for (n = nb_samples >> (1 - st); n > 0; n--) {
1291 int v = bytestream2_get_byteu(&gb);
1293 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3);
1294 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3);
1297 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1298 for (i = 0; i < avctx->channels; i++) {
1299 c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
1300 c->status[i].step_index = bytestream2_get_byteu(&gb);
1301 bytestream2_skipu(&gb, 1);
1302 if (c->status[i].step_index > 88u) {
1303 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1304 c->status[i].step_index);
1305 return AVERROR_INVALIDDATA;
1309 for (n = nb_samples >> (1 - st); n > 0; n--) {
1310 int v = bytestream2_get_byteu(&gb);
1312 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4, 3);
1313 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf, 3);
1316 case AV_CODEC_ID_ADPCM_CT:
1317 for (n = nb_samples >> (1 - st); n > 0; n--) {
1318 int v = bytestream2_get_byteu(&gb);
1319 *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
1320 *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
1323 case AV_CODEC_ID_ADPCM_SBPRO_4:
1324 case AV_CODEC_ID_ADPCM_SBPRO_3:
1325 case AV_CODEC_ID_ADPCM_SBPRO_2:
1326 if (!c->status[0].step_index) {
1327 /* the first byte is a raw sample */
1328 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1330 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1331 c->status[0].step_index = 1;
1334 if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) {
1335 for (n = nb_samples >> (1 - st); n > 0; n--) {
1336 int byte = bytestream2_get_byteu(&gb);
1337 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1339 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1342 } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) {
1343 for (n = (nb_samples<<st) / 3; n > 0; n--) {
1344 int byte = bytestream2_get_byteu(&gb);
1345 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1347 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1348 (byte >> 2) & 0x07, 3, 0);
1349 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1353 for (n = nb_samples >> (2 - st); n > 0; n--) {
1354 int byte = bytestream2_get_byteu(&gb);
1355 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1357 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1358 (byte >> 4) & 0x03, 2, 2);
1359 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1360 (byte >> 2) & 0x03, 2, 2);
1361 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1366 case AV_CODEC_ID_ADPCM_SWF:
1367 adpcm_swf_decode(avctx, buf, buf_size, samples);
1368 bytestream2_seek(&gb, 0, SEEK_END);
1370 case AV_CODEC_ID_ADPCM_YAMAHA:
1371 for (n = nb_samples >> (1 - st); n > 0; n--) {
1372 int v = bytestream2_get_byteu(&gb);
1373 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
1374 *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
1377 case AV_CODEC_ID_ADPCM_AFC:
1379 int samples_per_block;
1382 if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) {
1383 samples_per_block = avctx->extradata[0] / 16;
1384 blocks = nb_samples / avctx->extradata[0];
1386 samples_per_block = nb_samples / 16;
1390 for (m = 0; m < blocks; m++) {
1391 for (channel = 0; channel < avctx->channels; channel++) {
1392 int prev1 = c->status[channel].sample1;
1393 int prev2 = c->status[channel].sample2;
1395 samples = samples_p[channel] + m * 16;
1396 /* Read in every sample for this channel. */
1397 for (i = 0; i < samples_per_block; i++) {
1398 int byte = bytestream2_get_byteu(&gb);
1399 int scale = 1 << (byte >> 4);
1400 int index = byte & 0xf;
1401 int factor1 = ff_adpcm_afc_coeffs[0][index];
1402 int factor2 = ff_adpcm_afc_coeffs[1][index];
1404 /* Decode 16 samples. */
1405 for (n = 0; n < 16; n++) {
1409 sampledat = sign_extend(byte, 4);
1411 byte = bytestream2_get_byteu(&gb);
1412 sampledat = sign_extend(byte >> 4, 4);
1415 sampledat = ((prev1 * factor1 + prev2 * factor2) +
1416 ((sampledat * scale) << 11)) >> 11;
1417 *samples = av_clip_int16(sampledat);
1423 c->status[channel].sample1 = prev1;
1424 c->status[channel].sample2 = prev2;
1427 bytestream2_seek(&gb, 0, SEEK_END);
1430 case AV_CODEC_ID_ADPCM_THP:
1431 case AV_CODEC_ID_ADPCM_THP_LE:
1436 #define THP_GET16(g) \
1438 avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE ? \
1439 bytestream2_get_le16u(&(g)) : \
1440 bytestream2_get_be16u(&(g)), 16)
1442 if (avctx->extradata) {
1444 if (avctx->extradata_size < 32 * avctx->channels) {
1445 av_log(avctx, AV_LOG_ERROR, "Missing coeff table\n");
1446 return AVERROR_INVALIDDATA;
1449 bytestream2_init(&tb, avctx->extradata, avctx->extradata_size);
1450 for (i = 0; i < avctx->channels; i++)
1451 for (n = 0; n < 16; n++)
1452 table[i][n] = THP_GET16(tb);
1454 for (i = 0; i < avctx->channels; i++)
1455 for (n = 0; n < 16; n++)
1456 table[i][n] = THP_GET16(gb);
1458 /* Initialize the previous sample. */
1459 for (i = 0; i < avctx->channels; i++) {
1460 c->status[i].sample1 = THP_GET16(gb);
1461 c->status[i].sample2 = THP_GET16(gb);
1465 for (ch = 0; ch < avctx->channels; ch++) {
1466 samples = samples_p[ch];
1468 /* Read in every sample for this channel. */
1469 for (i = 0; i < (nb_samples + 13) / 14; i++) {
1470 int byte = bytestream2_get_byteu(&gb);
1471 int index = (byte >> 4) & 7;
1472 unsigned int exp = byte & 0x0F;
1473 int factor1 = table[ch][index * 2];
1474 int factor2 = table[ch][index * 2 + 1];
1476 /* Decode 14 samples. */
1477 for (n = 0; n < 14 && (i * 14 + n < nb_samples); n++) {
1481 sampledat = sign_extend(byte, 4);
1483 byte = bytestream2_get_byteu(&gb);
1484 sampledat = sign_extend(byte >> 4, 4);
1487 sampledat = ((c->status[ch].sample1 * factor1
1488 + c->status[ch].sample2 * factor2) >> 11) + (sampledat << exp);
1489 *samples = av_clip_int16(sampledat);
1490 c->status[ch].sample2 = c->status[ch].sample1;
1491 c->status[ch].sample1 = *samples++;
1497 case AV_CODEC_ID_ADPCM_DTK:
1498 for (channel = 0; channel < avctx->channels; channel++) {
1499 samples = samples_p[channel];
1501 /* Read in every sample for this channel. */
1502 for (i = 0; i < nb_samples / 28; i++) {
1505 bytestream2_skipu(&gb, 1);
1506 header = bytestream2_get_byteu(&gb);
1507 bytestream2_skipu(&gb, 3 - channel);
1509 /* Decode 28 samples. */
1510 for (n = 0; n < 28; n++) {
1511 int32_t sampledat, prev;
1513 switch (header >> 4) {
1515 prev = (c->status[channel].sample1 * 0x3c);
1518 prev = (c->status[channel].sample1 * 0x73) - (c->status[channel].sample2 * 0x34);
1521 prev = (c->status[channel].sample1 * 0x62) - (c->status[channel].sample2 * 0x37);
1527 prev = av_clip_intp2((prev + 0x20) >> 6, 21);
1529 byte = bytestream2_get_byteu(&gb);
1531 sampledat = sign_extend(byte, 4);
1533 sampledat = sign_extend(byte >> 4, 4);
1535 sampledat = (((sampledat << 12) >> (header & 0xf)) << 6) + prev;
1536 *samples++ = av_clip_int16(sampledat >> 6);
1537 c->status[channel].sample2 = c->status[channel].sample1;
1538 c->status[channel].sample1 = sampledat;
1542 bytestream2_seek(&gb, 0, SEEK_SET);
1550 if (avpkt->size && bytestream2_tell(&gb) == 0) {
1551 av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n");
1552 return AVERROR_INVALIDDATA;
1557 if (avpkt->size < bytestream2_tell(&gb)) {
1558 av_log(avctx, AV_LOG_ERROR, "Overread of %d < %d\n", avpkt->size, bytestream2_tell(&gb));
1562 return bytestream2_tell(&gb);
1566 static const enum AVSampleFormat sample_fmts_s16[] = { AV_SAMPLE_FMT_S16,
1567 AV_SAMPLE_FMT_NONE };
1568 static const enum AVSampleFormat sample_fmts_s16p[] = { AV_SAMPLE_FMT_S16P,
1569 AV_SAMPLE_FMT_NONE };
1570 static const enum AVSampleFormat sample_fmts_both[] = { AV_SAMPLE_FMT_S16,
1572 AV_SAMPLE_FMT_NONE };
1574 #define ADPCM_DECODER(id_, sample_fmts_, name_, long_name_) \
1575 AVCodec ff_ ## name_ ## _decoder = { \
1577 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1578 .type = AVMEDIA_TYPE_AUDIO, \
1580 .priv_data_size = sizeof(ADPCMDecodeContext), \
1581 .init = adpcm_decode_init, \
1582 .decode = adpcm_decode_frame, \
1583 .capabilities = CODEC_CAP_DR1, \
1584 .sample_fmts = sample_fmts_, \
1587 /* Note: Do not forget to add new entries to the Makefile as well. */
1588 ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie");
1589 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC");
1590 ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology");
1591 ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK");
1592 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts");
1593 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
1594 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1");
1595 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2");
1596 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3");
1597 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
1598 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV");
1599 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC");
1600 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
1601 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
1602 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
1603 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
1604 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
1605 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI");
1606 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime");
1607 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical");
1608 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
1609 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV");
1610 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood");
1611 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MS, sample_fmts_s16, adpcm_ms, "ADPCM Microsoft");
1612 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
1613 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
1614 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
1615 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash");
1616 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP_LE, sample_fmts_s16p, adpcm_thp_le, "ADPCM Nintendo Gamecube THP (little-endian)");
1617 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo Gamecube THP");
1618 ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA");
1619 ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha");