2 * Copyright (c) 2001-2003 The FFmpeg Project
4 * first version by Francois Revol (revol@free.fr)
5 * fringe ADPCM codecs (e.g., DK3, DK4, Westwood)
6 * by Mike Melanson (melanson@pcisys.net)
7 * CD-ROM XA ADPCM codec by BERO
8 * EA ADPCM decoder by Robin Kay (komadori@myrealbox.com)
9 * EA ADPCM R1/R2/R3 decoder by Peter Ross (pross@xvid.org)
10 * EA IMA EACS decoder by Peter Ross (pross@xvid.org)
11 * EA IMA SEAD decoder by Peter Ross (pross@xvid.org)
12 * EA ADPCM XAS decoder by Peter Ross (pross@xvid.org)
13 * MAXIS EA ADPCM decoder by Robert Marston (rmarston@gmail.com)
14 * THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl)
16 * This file is part of FFmpeg.
18 * FFmpeg is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU Lesser General Public
20 * License as published by the Free Software Foundation; either
21 * version 2.1 of the License, or (at your option) any later version.
23 * FFmpeg is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 * Lesser General Public License for more details.
28 * You should have received a copy of the GNU Lesser General Public
29 * License along with FFmpeg; if not, write to the Free Software
30 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
34 #include "bytestream.h"
36 #include "adpcm_data.h"
42 * Features and limitations:
44 * Reference documents:
45 * http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs
46 * http://www.pcisys.net/~melanson/codecs/simpleaudio.html [dead]
47 * http://www.geocities.com/SiliconValley/8682/aud3.txt [dead]
48 * http://openquicktime.sourceforge.net/
49 * XAnim sources (xa_codec.c) http://xanim.polter.net/
50 * http://www.cs.ucla.edu/~leec/mediabench/applications.html [dead]
51 * SoX source code http://sox.sourceforge.net/
54 * http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html [dead]
55 * vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html [dead]
56 * readstr http://www.geocities.co.jp/Playtown/2004/
59 /* These are for CD-ROM XA ADPCM */
60 static const int xa_adpcm_table[5][2] = {
68 static const int ea_adpcm_table[] = {
76 // padded to zero where table size is less then 16
77 static const int swf_index_tables[4][16] = {
79 /*3*/ { -1, -1, 2, 4 },
80 /*4*/ { -1, -1, -1, -1, 2, 4, 6, 8 },
81 /*5*/ { -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16 }
86 typedef struct ADPCMDecodeContext {
87 ADPCMChannelStatus status[14];
88 int vqa_version; /**< VQA version. Used for ADPCM_IMA_WS */
92 static av_cold int adpcm_decode_init(AVCodecContext * avctx)
94 ADPCMDecodeContext *c = avctx->priv_data;
95 unsigned int min_channels = 1;
96 unsigned int max_channels = 2;
98 switch(avctx->codec->id) {
99 case AV_CODEC_ID_ADPCM_DTK:
100 case AV_CODEC_ID_ADPCM_EA:
103 case AV_CODEC_ID_ADPCM_AFC:
104 case AV_CODEC_ID_ADPCM_EA_R1:
105 case AV_CODEC_ID_ADPCM_EA_R2:
106 case AV_CODEC_ID_ADPCM_EA_R3:
107 case AV_CODEC_ID_ADPCM_EA_XAS:
110 case AV_CODEC_ID_ADPCM_PSX:
113 case AV_CODEC_ID_ADPCM_THP:
114 case AV_CODEC_ID_ADPCM_THP_LE:
118 if (avctx->channels < min_channels || avctx->channels > max_channels) {
119 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
120 return AVERROR(EINVAL);
123 switch(avctx->codec->id) {
124 case AV_CODEC_ID_ADPCM_CT:
125 c->status[0].step = c->status[1].step = 511;
127 case AV_CODEC_ID_ADPCM_IMA_WAV:
128 if (avctx->bits_per_coded_sample < 2 || avctx->bits_per_coded_sample > 5)
129 return AVERROR_INVALIDDATA;
131 case AV_CODEC_ID_ADPCM_IMA_APC:
132 if (avctx->extradata && avctx->extradata_size >= 8) {
133 c->status[0].predictor = AV_RL32(avctx->extradata);
134 c->status[1].predictor = AV_RL32(avctx->extradata + 4);
137 case AV_CODEC_ID_ADPCM_IMA_WS:
138 if (avctx->extradata && avctx->extradata_size >= 2)
139 c->vqa_version = AV_RL16(avctx->extradata);
145 switch(avctx->codec->id) {
146 case AV_CODEC_ID_ADPCM_AICA:
147 case AV_CODEC_ID_ADPCM_IMA_QT:
148 case AV_CODEC_ID_ADPCM_IMA_WAV:
149 case AV_CODEC_ID_ADPCM_4XM:
150 case AV_CODEC_ID_ADPCM_XA:
151 case AV_CODEC_ID_ADPCM_EA_R1:
152 case AV_CODEC_ID_ADPCM_EA_R2:
153 case AV_CODEC_ID_ADPCM_EA_R3:
154 case AV_CODEC_ID_ADPCM_EA_XAS:
155 case AV_CODEC_ID_ADPCM_THP:
156 case AV_CODEC_ID_ADPCM_THP_LE:
157 case AV_CODEC_ID_ADPCM_AFC:
158 case AV_CODEC_ID_ADPCM_DTK:
159 case AV_CODEC_ID_ADPCM_PSX:
160 avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
162 case AV_CODEC_ID_ADPCM_IMA_WS:
163 avctx->sample_fmt = c->vqa_version == 3 ? AV_SAMPLE_FMT_S16P :
167 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
173 static inline short adpcm_ima_expand_nibble(ADPCMChannelStatus *c, char nibble, int shift)
177 int sign, delta, diff, step;
179 step = ff_adpcm_step_table[c->step_index];
180 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
181 step_index = av_clip(step_index, 0, 88);
185 /* perform direct multiplication instead of series of jumps proposed by
186 * the reference ADPCM implementation since modern CPUs can do the mults
188 diff = ((2 * delta + 1) * step) >> shift;
189 predictor = c->predictor;
190 if (sign) predictor -= diff;
191 else predictor += diff;
193 c->predictor = av_clip_int16(predictor);
194 c->step_index = step_index;
196 return (short)c->predictor;
199 static inline int16_t adpcm_ima_wav_expand_nibble(ADPCMChannelStatus *c, GetBitContext *gb, int bps)
201 int nibble, step_index, predictor, sign, delta, diff, step, shift;
204 nibble = get_bits_le(gb, bps),
205 step = ff_adpcm_step_table[c->step_index];
206 step_index = c->step_index + ff_adpcm_index_tables[bps - 2][nibble];
207 step_index = av_clip(step_index, 0, 88);
209 sign = nibble & (1 << shift);
210 delta = av_mod_uintp2(nibble, shift);
211 diff = ((2 * delta + 1) * step) >> shift;
212 predictor = c->predictor;
213 if (sign) predictor -= diff;
214 else predictor += diff;
216 c->predictor = av_clip_int16(predictor);
217 c->step_index = step_index;
219 return (int16_t)c->predictor;
222 static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble, int shift)
228 step = ff_adpcm_step_table[c->step_index];
229 step_index = c->step_index + ff_adpcm_index_table[nibble];
230 step_index = av_clip(step_index, 0, 88);
233 if (nibble & 4) diff += step;
234 if (nibble & 2) diff += step >> 1;
235 if (nibble & 1) diff += step >> 2;
238 predictor = c->predictor - diff;
240 predictor = c->predictor + diff;
242 c->predictor = av_clip_int16(predictor);
243 c->step_index = step_index;
248 static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble)
252 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
253 predictor += ((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
255 c->sample2 = c->sample1;
256 c->sample1 = av_clip_int16(predictor);
257 c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8;
258 if (c->idelta < 16) c->idelta = 16;
259 if (c->idelta > INT_MAX/768) {
260 av_log(NULL, AV_LOG_WARNING, "idelta overflow\n");
261 c->idelta = INT_MAX/768;
267 static inline short adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble)
269 int step_index, predictor, sign, delta, diff, step;
271 step = ff_adpcm_oki_step_table[c->step_index];
272 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
273 step_index = av_clip(step_index, 0, 48);
277 diff = ((2 * delta + 1) * step) >> 3;
278 predictor = c->predictor;
279 if (sign) predictor -= diff;
280 else predictor += diff;
282 c->predictor = av_clip_intp2(predictor, 11);
283 c->step_index = step_index;
285 return c->predictor << 4;
288 static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
290 int sign, delta, diff;
295 /* perform direct multiplication instead of series of jumps proposed by
296 * the reference ADPCM implementation since modern CPUs can do the mults
298 diff = ((2 * delta + 1) * c->step) >> 3;
299 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
300 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
301 c->predictor = av_clip_int16(c->predictor);
302 /* calculate new step and clamp it to range 511..32767 */
303 new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
304 c->step = av_clip(new_step, 511, 32767);
306 return (short)c->predictor;
309 static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble, int size, int shift)
311 int sign, delta, diff;
313 sign = nibble & (1<<(size-1));
314 delta = nibble & ((1<<(size-1))-1);
315 diff = delta << (7 + c->step + shift);
318 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
320 /* calculate new step */
321 if (delta >= (2*size - 3) && c->step < 3)
323 else if (delta == 0 && c->step > 0)
326 return (short) c->predictor;
329 static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned char nibble)
336 c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
337 c->predictor = av_clip_int16(c->predictor);
338 c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
339 c->step = av_clip(c->step, 127, 24567);
343 static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1,
344 const uint8_t *in, ADPCMChannelStatus *left,
345 ADPCMChannelStatus *right, int channels, int sample_offset)
348 int shift,filter,f0,f1;
352 out0 += sample_offset;
356 out1 += sample_offset;
359 shift = 12 - (in[4+i*2] & 15);
360 filter = in[4+i*2] >> 4;
361 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
362 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
365 f0 = xa_adpcm_table[filter][0];
366 f1 = xa_adpcm_table[filter][1];
374 t = sign_extend(d, 4);
375 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
377 s_1 = av_clip_int16(s);
384 s_1 = right->sample1;
385 s_2 = right->sample2;
388 shift = 12 - (in[5+i*2] & 15);
389 filter = in[5+i*2] >> 4;
390 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
391 avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
395 f0 = xa_adpcm_table[filter][0];
396 f1 = xa_adpcm_table[filter][1];
401 t = sign_extend(d >> 4, 4);
402 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
404 s_1 = av_clip_int16(s);
409 right->sample1 = s_1;
410 right->sample2 = s_2;
416 out0 += 28 * (3 - channels);
417 out1 += 28 * (3 - channels);
423 static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples)
425 ADPCMDecodeContext *c = avctx->priv_data;
428 int k0, signmask, nb_bits, count;
429 int size = buf_size*8;
432 init_get_bits(&gb, buf, size);
434 //read bits & initial values
435 nb_bits = get_bits(&gb, 2)+2;
436 table = swf_index_tables[nb_bits-2];
437 k0 = 1 << (nb_bits-2);
438 signmask = 1 << (nb_bits-1);
440 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
441 for (i = 0; i < avctx->channels; i++) {
442 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
443 c->status[i].step_index = get_bits(&gb, 6);
446 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
449 for (i = 0; i < avctx->channels; i++) {
450 // similar to IMA adpcm
451 int delta = get_bits(&gb, nb_bits);
452 int step = ff_adpcm_step_table[c->status[i].step_index];
453 long vpdiff = 0; // vpdiff = (delta+0.5)*step/4
464 if (delta & signmask)
465 c->status[i].predictor -= vpdiff;
467 c->status[i].predictor += vpdiff;
469 c->status[i].step_index += table[delta & (~signmask)];
471 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
472 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
474 *samples++ = c->status[i].predictor;
481 * Get the number of samples that will be decoded from the packet.
482 * In one case, this is actually the maximum number of samples possible to
483 * decode with the given buf_size.
485 * @param[out] coded_samples set to the number of samples as coded in the
486 * packet, or 0 if the codec does not encode the
487 * number of samples in each frame.
488 * @param[out] approx_nb_samples set to non-zero if the number of samples
489 * returned is an approximation.
491 static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
492 int buf_size, int *coded_samples, int *approx_nb_samples)
494 ADPCMDecodeContext *s = avctx->priv_data;
496 int ch = avctx->channels;
497 int has_coded_samples = 0;
501 *approx_nb_samples = 0;
506 switch (avctx->codec->id) {
507 /* constant, only check buf_size */
508 case AV_CODEC_ID_ADPCM_EA_XAS:
509 if (buf_size < 76 * ch)
513 case AV_CODEC_ID_ADPCM_IMA_QT:
514 if (buf_size < 34 * ch)
518 /* simple 4-bit adpcm */
519 case AV_CODEC_ID_ADPCM_CT:
520 case AV_CODEC_ID_ADPCM_IMA_APC:
521 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
522 case AV_CODEC_ID_ADPCM_IMA_OKI:
523 case AV_CODEC_ID_ADPCM_IMA_WS:
524 case AV_CODEC_ID_ADPCM_YAMAHA:
525 case AV_CODEC_ID_ADPCM_AICA:
526 nb_samples = buf_size * 2 / ch;
532 /* simple 4-bit adpcm, with header */
534 switch (avctx->codec->id) {
535 case AV_CODEC_ID_ADPCM_4XM:
536 case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
537 case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break;
538 case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break;
541 return (buf_size - header_size) * 2 / ch;
543 /* more complex formats */
544 switch (avctx->codec->id) {
545 case AV_CODEC_ID_ADPCM_EA:
546 has_coded_samples = 1;
547 *coded_samples = bytestream2_get_le32(gb);
548 *coded_samples -= *coded_samples % 28;
549 nb_samples = (buf_size - 12) / 30 * 28;
551 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
552 has_coded_samples = 1;
553 *coded_samples = bytestream2_get_le32(gb);
554 nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch;
556 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
557 nb_samples = (buf_size - ch) / ch * 2;
559 case AV_CODEC_ID_ADPCM_EA_R1:
560 case AV_CODEC_ID_ADPCM_EA_R2:
561 case AV_CODEC_ID_ADPCM_EA_R3:
562 /* maximum number of samples */
563 /* has internal offsets and a per-frame switch to signal raw 16-bit */
564 has_coded_samples = 1;
565 switch (avctx->codec->id) {
566 case AV_CODEC_ID_ADPCM_EA_R1:
567 header_size = 4 + 9 * ch;
568 *coded_samples = bytestream2_get_le32(gb);
570 case AV_CODEC_ID_ADPCM_EA_R2:
571 header_size = 4 + 5 * ch;
572 *coded_samples = bytestream2_get_le32(gb);
574 case AV_CODEC_ID_ADPCM_EA_R3:
575 header_size = 4 + 5 * ch;
576 *coded_samples = bytestream2_get_be32(gb);
579 *coded_samples -= *coded_samples % 28;
580 nb_samples = (buf_size - header_size) * 2 / ch;
581 nb_samples -= nb_samples % 28;
582 *approx_nb_samples = 1;
584 case AV_CODEC_ID_ADPCM_IMA_DK3:
585 if (avctx->block_align > 0)
586 buf_size = FFMIN(buf_size, avctx->block_align);
587 nb_samples = ((buf_size - 16) * 2 / 3 * 4) / ch;
589 case AV_CODEC_ID_ADPCM_IMA_DK4:
590 if (avctx->block_align > 0)
591 buf_size = FFMIN(buf_size, avctx->block_align);
592 if (buf_size < 4 * ch)
593 return AVERROR_INVALIDDATA;
594 nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch;
596 case AV_CODEC_ID_ADPCM_IMA_RAD:
597 if (avctx->block_align > 0)
598 buf_size = FFMIN(buf_size, avctx->block_align);
599 nb_samples = (buf_size - 4 * ch) * 2 / ch;
601 case AV_CODEC_ID_ADPCM_IMA_WAV:
603 int bsize = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
604 int bsamples = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
605 if (avctx->block_align > 0)
606 buf_size = FFMIN(buf_size, avctx->block_align);
607 if (buf_size < 4 * ch)
608 return AVERROR_INVALIDDATA;
609 nb_samples = 1 + (buf_size - 4 * ch) / (bsize * ch) * bsamples;
612 case AV_CODEC_ID_ADPCM_MS:
613 if (avctx->block_align > 0)
614 buf_size = FFMIN(buf_size, avctx->block_align);
615 nb_samples = (buf_size - 6 * ch) * 2 / ch;
617 case AV_CODEC_ID_ADPCM_SBPRO_2:
618 case AV_CODEC_ID_ADPCM_SBPRO_3:
619 case AV_CODEC_ID_ADPCM_SBPRO_4:
621 int samples_per_byte;
622 switch (avctx->codec->id) {
623 case AV_CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break;
624 case AV_CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break;
625 case AV_CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break;
627 if (!s->status[0].step_index) {
629 return AVERROR_INVALIDDATA;
633 nb_samples += buf_size * samples_per_byte / ch;
636 case AV_CODEC_ID_ADPCM_SWF:
638 int buf_bits = buf_size * 8 - 2;
639 int nbits = (bytestream2_get_byte(gb) >> 6) + 2;
640 int block_hdr_size = 22 * ch;
641 int block_size = block_hdr_size + nbits * ch * 4095;
642 int nblocks = buf_bits / block_size;
643 int bits_left = buf_bits - nblocks * block_size;
644 nb_samples = nblocks * 4096;
645 if (bits_left >= block_hdr_size)
646 nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch);
649 case AV_CODEC_ID_ADPCM_THP:
650 case AV_CODEC_ID_ADPCM_THP_LE:
651 if (avctx->extradata) {
652 nb_samples = buf_size * 14 / (8 * ch);
655 has_coded_samples = 1;
656 bytestream2_skip(gb, 4); // channel size
657 *coded_samples = (avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE) ?
658 bytestream2_get_le32(gb) :
659 bytestream2_get_be32(gb);
660 buf_size -= 8 + 36 * ch;
662 nb_samples = buf_size / 8 * 14;
663 if (buf_size % 8 > 1)
664 nb_samples += (buf_size % 8 - 1) * 2;
665 *approx_nb_samples = 1;
667 case AV_CODEC_ID_ADPCM_AFC:
668 nb_samples = buf_size / (9 * ch) * 16;
670 case AV_CODEC_ID_ADPCM_XA:
671 nb_samples = (buf_size / 128) * 224 / ch;
673 case AV_CODEC_ID_ADPCM_DTK:
674 case AV_CODEC_ID_ADPCM_PSX:
675 nb_samples = buf_size / (16 * ch) * 28;
679 /* validate coded sample count */
680 if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
681 return AVERROR_INVALIDDATA;
686 static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
687 int *got_frame_ptr, AVPacket *avpkt)
689 AVFrame *frame = data;
690 const uint8_t *buf = avpkt->data;
691 int buf_size = avpkt->size;
692 ADPCMDecodeContext *c = avctx->priv_data;
693 ADPCMChannelStatus *cs;
694 int n, m, channel, i;
699 int nb_samples, coded_samples, approx_nb_samples, ret;
702 bytestream2_init(&gb, buf, buf_size);
703 nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples, &approx_nb_samples);
704 if (nb_samples <= 0) {
705 av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
706 return AVERROR_INVALIDDATA;
709 /* get output buffer */
710 frame->nb_samples = nb_samples;
711 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
713 samples = (short *)frame->data[0];
714 samples_p = (int16_t **)frame->extended_data;
716 /* use coded_samples when applicable */
717 /* it is always <= nb_samples, so the output buffer will be large enough */
719 if (!approx_nb_samples && coded_samples != nb_samples)
720 av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
721 frame->nb_samples = nb_samples = coded_samples;
724 st = avctx->channels == 2 ? 1 : 0;
726 switch(avctx->codec->id) {
727 case AV_CODEC_ID_ADPCM_IMA_QT:
728 /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
729 Channel data is interleaved per-chunk. */
730 for (channel = 0; channel < avctx->channels; channel++) {
733 cs = &(c->status[channel]);
734 /* (pppppp) (piiiiiii) */
736 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
737 predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
738 step_index = predictor & 0x7F;
741 if (cs->step_index == step_index) {
742 int diff = predictor - cs->predictor;
749 cs->step_index = step_index;
750 cs->predictor = predictor;
753 if (cs->step_index > 88u){
754 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
755 channel, cs->step_index);
756 return AVERROR_INVALIDDATA;
759 samples = samples_p[channel];
761 for (m = 0; m < 64; m += 2) {
762 int byte = bytestream2_get_byteu(&gb);
763 samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F, 3);
764 samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 , 3);
768 case AV_CODEC_ID_ADPCM_IMA_WAV:
769 for(i=0; i<avctx->channels; i++){
770 cs = &(c->status[i]);
771 cs->predictor = samples_p[i][0] = sign_extend(bytestream2_get_le16u(&gb), 16);
773 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
774 if (cs->step_index > 88u){
775 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
777 return AVERROR_INVALIDDATA;
781 if (avctx->bits_per_coded_sample != 4) {
782 int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
785 ret = init_get_bits8(&g, gb.buffer, bytestream2_get_bytes_left(&gb));
788 for (n = 0; n < (nb_samples - 1) / samples_per_block; n++) {
789 for (i = 0; i < avctx->channels; i++) {
791 samples = &samples_p[i][1 + n * samples_per_block];
792 for (m = 0; m < samples_per_block; m++) {
793 samples[m] = adpcm_ima_wav_expand_nibble(cs, &g,
794 avctx->bits_per_coded_sample);
798 bytestream2_skip(&gb, avctx->block_align - avctx->channels * 4);
800 for (n = 0; n < (nb_samples - 1) / 8; n++) {
801 for (i = 0; i < avctx->channels; i++) {
803 samples = &samples_p[i][1 + n * 8];
804 for (m = 0; m < 8; m += 2) {
805 int v = bytestream2_get_byteu(&gb);
806 samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
807 samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
813 case AV_CODEC_ID_ADPCM_4XM:
814 for (i = 0; i < avctx->channels; i++)
815 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
817 for (i = 0; i < avctx->channels; i++) {
818 c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
819 if (c->status[i].step_index > 88u) {
820 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
821 i, c->status[i].step_index);
822 return AVERROR_INVALIDDATA;
826 for (i = 0; i < avctx->channels; i++) {
827 samples = (int16_t *)frame->data[i];
829 for (n = nb_samples >> 1; n > 0; n--) {
830 int v = bytestream2_get_byteu(&gb);
831 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
832 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
836 case AV_CODEC_ID_ADPCM_MS:
840 block_predictor = bytestream2_get_byteu(&gb);
841 if (block_predictor > 6) {
842 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n",
844 return AVERROR_INVALIDDATA;
846 c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
847 c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
849 block_predictor = bytestream2_get_byteu(&gb);
850 if (block_predictor > 6) {
851 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n",
853 return AVERROR_INVALIDDATA;
855 c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
856 c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
858 c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
860 c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
863 c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
864 if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
865 c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
866 if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
868 *samples++ = c->status[0].sample2;
869 if (st) *samples++ = c->status[1].sample2;
870 *samples++ = c->status[0].sample1;
871 if (st) *samples++ = c->status[1].sample1;
872 for(n = (nb_samples - 2) >> (1 - st); n > 0; n--) {
873 int byte = bytestream2_get_byteu(&gb);
874 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 );
875 *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F);
879 case AV_CODEC_ID_ADPCM_IMA_DK4:
880 for (channel = 0; channel < avctx->channels; channel++) {
881 cs = &c->status[channel];
882 cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16);
883 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
884 if (cs->step_index > 88u){
885 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
886 channel, cs->step_index);
887 return AVERROR_INVALIDDATA;
890 for (n = (nb_samples - 1) >> (1 - st); n > 0; n--) {
891 int v = bytestream2_get_byteu(&gb);
892 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
893 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
896 case AV_CODEC_ID_ADPCM_IMA_DK3:
900 int decode_top_nibble_next = 0;
902 const int16_t *samples_end = samples + avctx->channels * nb_samples;
904 bytestream2_skipu(&gb, 10);
905 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
906 c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
907 c->status[0].step_index = bytestream2_get_byteu(&gb);
908 c->status[1].step_index = bytestream2_get_byteu(&gb);
909 if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){
910 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n",
911 c->status[0].step_index, c->status[1].step_index);
912 return AVERROR_INVALIDDATA;
914 /* sign extend the predictors */
915 diff_channel = c->status[1].predictor;
917 /* DK3 ADPCM support macro */
918 #define DK3_GET_NEXT_NIBBLE() \
919 if (decode_top_nibble_next) { \
920 nibble = last_byte >> 4; \
921 decode_top_nibble_next = 0; \
923 last_byte = bytestream2_get_byteu(&gb); \
924 nibble = last_byte & 0x0F; \
925 decode_top_nibble_next = 1; \
928 while (samples < samples_end) {
930 /* for this algorithm, c->status[0] is the sum channel and
931 * c->status[1] is the diff channel */
933 /* process the first predictor of the sum channel */
934 DK3_GET_NEXT_NIBBLE();
935 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
937 /* process the diff channel predictor */
938 DK3_GET_NEXT_NIBBLE();
939 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
941 /* process the first pair of stereo PCM samples */
942 diff_channel = (diff_channel + c->status[1].predictor) / 2;
943 *samples++ = c->status[0].predictor + c->status[1].predictor;
944 *samples++ = c->status[0].predictor - c->status[1].predictor;
946 /* process the second predictor of the sum channel */
947 DK3_GET_NEXT_NIBBLE();
948 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
950 /* process the second pair of stereo PCM samples */
951 diff_channel = (diff_channel + c->status[1].predictor) / 2;
952 *samples++ = c->status[0].predictor + c->status[1].predictor;
953 *samples++ = c->status[0].predictor - c->status[1].predictor;
956 if ((bytestream2_tell(&gb) & 1))
957 bytestream2_skip(&gb, 1);
960 case AV_CODEC_ID_ADPCM_IMA_ISS:
961 for (channel = 0; channel < avctx->channels; channel++) {
962 cs = &c->status[channel];
963 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
964 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
965 if (cs->step_index > 88u){
966 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
967 channel, cs->step_index);
968 return AVERROR_INVALIDDATA;
972 for (n = nb_samples >> (1 - st); n > 0; n--) {
974 int v = bytestream2_get_byteu(&gb);
975 /* nibbles are swapped for mono */
983 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
984 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
987 case AV_CODEC_ID_ADPCM_IMA_APC:
988 while (bytestream2_get_bytes_left(&gb) > 0) {
989 int v = bytestream2_get_byteu(&gb);
990 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
991 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
994 case AV_CODEC_ID_ADPCM_IMA_OKI:
995 while (bytestream2_get_bytes_left(&gb) > 0) {
996 int v = bytestream2_get_byteu(&gb);
997 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 );
998 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F);
1001 case AV_CODEC_ID_ADPCM_IMA_RAD:
1002 for (channel = 0; channel < avctx->channels; channel++) {
1003 cs = &c->status[channel];
1004 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1005 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1006 if (cs->step_index > 88u){
1007 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1008 channel, cs->step_index);
1009 return AVERROR_INVALIDDATA;
1012 for (n = 0; n < nb_samples / 2; n++) {
1015 byte[0] = bytestream2_get_byteu(&gb);
1017 byte[1] = bytestream2_get_byteu(&gb);
1018 for(channel = 0; channel < avctx->channels; channel++) {
1019 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] & 0x0F, 3);
1021 for(channel = 0; channel < avctx->channels; channel++) {
1022 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] >> 4 , 3);
1026 case AV_CODEC_ID_ADPCM_IMA_WS:
1027 if (c->vqa_version == 3) {
1028 for (channel = 0; channel < avctx->channels; channel++) {
1029 int16_t *smp = samples_p[channel];
1031 for (n = nb_samples / 2; n > 0; n--) {
1032 int v = bytestream2_get_byteu(&gb);
1033 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1034 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1038 for (n = nb_samples / 2; n > 0; n--) {
1039 for (channel = 0; channel < avctx->channels; channel++) {
1040 int v = bytestream2_get_byteu(&gb);
1041 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1042 samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1044 samples += avctx->channels;
1047 bytestream2_seek(&gb, 0, SEEK_END);
1049 case AV_CODEC_ID_ADPCM_XA:
1051 int16_t *out0 = samples_p[0];
1052 int16_t *out1 = samples_p[1];
1053 int samples_per_block = 28 * (3 - avctx->channels) * 4;
1054 int sample_offset = 0;
1055 while (bytestream2_get_bytes_left(&gb) >= 128) {
1056 if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb),
1057 &c->status[0], &c->status[1],
1058 avctx->channels, sample_offset)) < 0)
1060 bytestream2_skipu(&gb, 128);
1061 sample_offset += samples_per_block;
1065 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
1066 for (i=0; i<=st; i++) {
1067 c->status[i].step_index = bytestream2_get_le32u(&gb);
1068 if (c->status[i].step_index > 88u) {
1069 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1070 i, c->status[i].step_index);
1071 return AVERROR_INVALIDDATA;
1074 for (i=0; i<=st; i++)
1075 c->status[i].predictor = bytestream2_get_le32u(&gb);
1077 for (n = nb_samples >> (1 - st); n > 0; n--) {
1078 int byte = bytestream2_get_byteu(&gb);
1079 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3);
1080 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3);
1083 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
1084 for (n = nb_samples >> (1 - st); n > 0; n--) {
1085 int byte = bytestream2_get_byteu(&gb);
1086 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6);
1087 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6);
1090 case AV_CODEC_ID_ADPCM_EA:
1092 int previous_left_sample, previous_right_sample;
1093 int current_left_sample, current_right_sample;
1094 int next_left_sample, next_right_sample;
1095 int coeff1l, coeff2l, coeff1r, coeff2r;
1096 int shift_left, shift_right;
1098 /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
1099 each coding 28 stereo samples. */
1101 if(avctx->channels != 2)
1102 return AVERROR_INVALIDDATA;
1104 current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1105 previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1106 current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1107 previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1109 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1110 int byte = bytestream2_get_byteu(&gb);
1111 coeff1l = ea_adpcm_table[ byte >> 4 ];
1112 coeff2l = ea_adpcm_table[(byte >> 4 ) + 4];
1113 coeff1r = ea_adpcm_table[ byte & 0x0F];
1114 coeff2r = ea_adpcm_table[(byte & 0x0F) + 4];
1116 byte = bytestream2_get_byteu(&gb);
1117 shift_left = 20 - (byte >> 4);
1118 shift_right = 20 - (byte & 0x0F);
1120 for (count2 = 0; count2 < 28; count2++) {
1121 byte = bytestream2_get_byteu(&gb);
1122 next_left_sample = sign_extend(byte >> 4, 4) << shift_left;
1123 next_right_sample = sign_extend(byte, 4) << shift_right;
1125 next_left_sample = (next_left_sample +
1126 (current_left_sample * coeff1l) +
1127 (previous_left_sample * coeff2l) + 0x80) >> 8;
1128 next_right_sample = (next_right_sample +
1129 (current_right_sample * coeff1r) +
1130 (previous_right_sample * coeff2r) + 0x80) >> 8;
1132 previous_left_sample = current_left_sample;
1133 current_left_sample = av_clip_int16(next_left_sample);
1134 previous_right_sample = current_right_sample;
1135 current_right_sample = av_clip_int16(next_right_sample);
1136 *samples++ = current_left_sample;
1137 *samples++ = current_right_sample;
1141 bytestream2_skip(&gb, 2); // Skip terminating 0x0000
1145 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
1147 int coeff[2][2], shift[2];
1149 for(channel = 0; channel < avctx->channels; channel++) {
1150 int byte = bytestream2_get_byteu(&gb);
1152 coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i];
1153 shift[channel] = 20 - (byte & 0x0F);
1155 for (count1 = 0; count1 < nb_samples / 2; count1++) {
1158 byte[0] = bytestream2_get_byteu(&gb);
1159 if (st) byte[1] = bytestream2_get_byteu(&gb);
1160 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1161 for(channel = 0; channel < avctx->channels; channel++) {
1162 int sample = sign_extend(byte[channel] >> i, 4) << shift[channel];
1164 c->status[channel].sample1 * coeff[channel][0] +
1165 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1166 c->status[channel].sample2 = c->status[channel].sample1;
1167 c->status[channel].sample1 = av_clip_int16(sample);
1168 *samples++ = c->status[channel].sample1;
1172 bytestream2_seek(&gb, 0, SEEK_END);
1175 case AV_CODEC_ID_ADPCM_EA_R1:
1176 case AV_CODEC_ID_ADPCM_EA_R2:
1177 case AV_CODEC_ID_ADPCM_EA_R3: {
1178 /* channel numbering
1180 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1181 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1182 const int big_endian = avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R3;
1183 int previous_sample, current_sample, next_sample;
1186 unsigned int channel;
1191 for (channel=0; channel<avctx->channels; channel++)
1192 offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) :
1193 bytestream2_get_le32(&gb)) +
1194 (avctx->channels + 1) * 4;
1196 for (channel=0; channel<avctx->channels; channel++) {
1197 bytestream2_seek(&gb, offsets[channel], SEEK_SET);
1198 samplesC = samples_p[channel];
1200 if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) {
1201 current_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1202 previous_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1204 current_sample = c->status[channel].predictor;
1205 previous_sample = c->status[channel].prev_sample;
1208 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1209 int byte = bytestream2_get_byte(&gb);
1210 if (byte == 0xEE) { /* only seen in R2 and R3 */
1211 current_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1212 previous_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1214 for (count2=0; count2<28; count2++)
1215 *samplesC++ = sign_extend(bytestream2_get_be16(&gb), 16);
1217 coeff1 = ea_adpcm_table[ byte >> 4 ];
1218 coeff2 = ea_adpcm_table[(byte >> 4) + 4];
1219 shift = 20 - (byte & 0x0F);
1221 for (count2=0; count2<28; count2++) {
1223 next_sample = sign_extend(byte, 4) << shift;
1225 byte = bytestream2_get_byte(&gb);
1226 next_sample = sign_extend(byte >> 4, 4) << shift;
1229 next_sample += (current_sample * coeff1) +
1230 (previous_sample * coeff2);
1231 next_sample = av_clip_int16(next_sample >> 8);
1233 previous_sample = current_sample;
1234 current_sample = next_sample;
1235 *samplesC++ = current_sample;
1241 } else if (count != count1) {
1242 av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
1243 count = FFMAX(count, count1);
1246 if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) {
1247 c->status[channel].predictor = current_sample;
1248 c->status[channel].prev_sample = previous_sample;
1252 frame->nb_samples = count * 28;
1253 bytestream2_seek(&gb, 0, SEEK_END);
1256 case AV_CODEC_ID_ADPCM_EA_XAS:
1257 for (channel=0; channel<avctx->channels; channel++) {
1258 int coeff[2][4], shift[4];
1259 int16_t *s = samples_p[channel];
1260 for (n = 0; n < 4; n++, s += 32) {
1261 int val = sign_extend(bytestream2_get_le16u(&gb), 16);
1263 coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i];
1266 val = sign_extend(bytestream2_get_le16u(&gb), 16);
1267 shift[n] = 20 - (val & 0x0F);
1271 for (m=2; m<32; m+=2) {
1272 s = &samples_p[channel][m];
1273 for (n = 0; n < 4; n++, s += 32) {
1275 int byte = bytestream2_get_byteu(&gb);
1277 level = sign_extend(byte >> 4, 4) << shift[n];
1278 pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n];
1279 s[0] = av_clip_int16((level + pred + 0x80) >> 8);
1281 level = sign_extend(byte, 4) << shift[n];
1282 pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n];
1283 s[1] = av_clip_int16((level + pred + 0x80) >> 8);
1288 case AV_CODEC_ID_ADPCM_IMA_AMV:
1289 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1290 c->status[0].step_index = bytestream2_get_le16u(&gb);
1291 bytestream2_skipu(&gb, 4);
1292 if (c->status[0].step_index > 88u) {
1293 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1294 c->status[0].step_index);
1295 return AVERROR_INVALIDDATA;
1298 for (n = nb_samples >> (1 - st); n > 0; n--) {
1299 int v = bytestream2_get_byteu(&gb);
1301 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3);
1302 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3);
1305 case AV_CODEC_ID_ADPCM_IMA_SMJPEG:
1306 for (i = 0; i < avctx->channels; i++) {
1307 c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
1308 c->status[i].step_index = bytestream2_get_byteu(&gb);
1309 bytestream2_skipu(&gb, 1);
1310 if (c->status[i].step_index > 88u) {
1311 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1312 c->status[i].step_index);
1313 return AVERROR_INVALIDDATA;
1317 for (n = nb_samples >> (1 - st); n > 0; n--) {
1318 int v = bytestream2_get_byteu(&gb);
1320 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4, 3);
1321 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf, 3);
1324 case AV_CODEC_ID_ADPCM_CT:
1325 for (n = nb_samples >> (1 - st); n > 0; n--) {
1326 int v = bytestream2_get_byteu(&gb);
1327 *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
1328 *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
1331 case AV_CODEC_ID_ADPCM_SBPRO_4:
1332 case AV_CODEC_ID_ADPCM_SBPRO_3:
1333 case AV_CODEC_ID_ADPCM_SBPRO_2:
1334 if (!c->status[0].step_index) {
1335 /* the first byte is a raw sample */
1336 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1338 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1339 c->status[0].step_index = 1;
1342 if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) {
1343 for (n = nb_samples >> (1 - st); 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[st],
1350 } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) {
1351 for (n = (nb_samples<<st) / 3; n > 0; n--) {
1352 int byte = bytestream2_get_byteu(&gb);
1353 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1355 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1356 (byte >> 2) & 0x07, 3, 0);
1357 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1361 for (n = nb_samples >> (2 - st); n > 0; n--) {
1362 int byte = bytestream2_get_byteu(&gb);
1363 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1365 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1366 (byte >> 4) & 0x03, 2, 2);
1367 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1368 (byte >> 2) & 0x03, 2, 2);
1369 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1374 case AV_CODEC_ID_ADPCM_SWF:
1375 adpcm_swf_decode(avctx, buf, buf_size, samples);
1376 bytestream2_seek(&gb, 0, SEEK_END);
1378 case AV_CODEC_ID_ADPCM_YAMAHA:
1379 for (n = nb_samples >> (1 - st); n > 0; n--) {
1380 int v = bytestream2_get_byteu(&gb);
1381 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
1382 *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
1385 case AV_CODEC_ID_ADPCM_AICA:
1386 if (!c->has_status) {
1387 for (channel = 0; channel < avctx->channels; channel++)
1388 c->status[channel].step = 0;
1391 for (channel = 0; channel < avctx->channels; channel++) {
1392 samples = samples_p[channel];
1393 for (n = nb_samples >> 1; n > 0; n--) {
1394 int v = bytestream2_get_byteu(&gb);
1395 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v & 0x0F);
1396 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v >> 4 );
1400 case AV_CODEC_ID_ADPCM_AFC:
1402 int samples_per_block;
1405 if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) {
1406 samples_per_block = avctx->extradata[0] / 16;
1407 blocks = nb_samples / avctx->extradata[0];
1409 samples_per_block = nb_samples / 16;
1413 for (m = 0; m < blocks; m++) {
1414 for (channel = 0; channel < avctx->channels; channel++) {
1415 int prev1 = c->status[channel].sample1;
1416 int prev2 = c->status[channel].sample2;
1418 samples = samples_p[channel] + m * 16;
1419 /* Read in every sample for this channel. */
1420 for (i = 0; i < samples_per_block; i++) {
1421 int byte = bytestream2_get_byteu(&gb);
1422 int scale = 1 << (byte >> 4);
1423 int index = byte & 0xf;
1424 int factor1 = ff_adpcm_afc_coeffs[0][index];
1425 int factor2 = ff_adpcm_afc_coeffs[1][index];
1427 /* Decode 16 samples. */
1428 for (n = 0; n < 16; n++) {
1432 sampledat = sign_extend(byte, 4);
1434 byte = bytestream2_get_byteu(&gb);
1435 sampledat = sign_extend(byte >> 4, 4);
1438 sampledat = ((prev1 * factor1 + prev2 * factor2) +
1439 ((sampledat * scale) << 11)) >> 11;
1440 *samples = av_clip_int16(sampledat);
1446 c->status[channel].sample1 = prev1;
1447 c->status[channel].sample2 = prev2;
1450 bytestream2_seek(&gb, 0, SEEK_END);
1453 case AV_CODEC_ID_ADPCM_THP:
1454 case AV_CODEC_ID_ADPCM_THP_LE:
1459 #define THP_GET16(g) \
1461 avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE ? \
1462 bytestream2_get_le16u(&(g)) : \
1463 bytestream2_get_be16u(&(g)), 16)
1465 if (avctx->extradata) {
1467 if (avctx->extradata_size < 32 * avctx->channels) {
1468 av_log(avctx, AV_LOG_ERROR, "Missing coeff table\n");
1469 return AVERROR_INVALIDDATA;
1472 bytestream2_init(&tb, avctx->extradata, avctx->extradata_size);
1473 for (i = 0; i < avctx->channels; i++)
1474 for (n = 0; n < 16; n++)
1475 table[i][n] = THP_GET16(tb);
1477 for (i = 0; i < avctx->channels; i++)
1478 for (n = 0; n < 16; n++)
1479 table[i][n] = THP_GET16(gb);
1481 if (!c->has_status) {
1482 /* Initialize the previous sample. */
1483 for (i = 0; i < avctx->channels; i++) {
1484 c->status[i].sample1 = THP_GET16(gb);
1485 c->status[i].sample2 = THP_GET16(gb);
1489 bytestream2_skip(&gb, avctx->channels * 4);
1493 for (ch = 0; ch < avctx->channels; ch++) {
1494 samples = samples_p[ch];
1496 /* Read in every sample for this channel. */
1497 for (i = 0; i < (nb_samples + 13) / 14; i++) {
1498 int byte = bytestream2_get_byteu(&gb);
1499 int index = (byte >> 4) & 7;
1500 unsigned int exp = byte & 0x0F;
1501 int factor1 = table[ch][index * 2];
1502 int factor2 = table[ch][index * 2 + 1];
1504 /* Decode 14 samples. */
1505 for (n = 0; n < 14 && (i * 14 + n < nb_samples); n++) {
1509 sampledat = sign_extend(byte, 4);
1511 byte = bytestream2_get_byteu(&gb);
1512 sampledat = sign_extend(byte >> 4, 4);
1515 sampledat = ((c->status[ch].sample1 * factor1
1516 + c->status[ch].sample2 * factor2) >> 11) + (sampledat << exp);
1517 *samples = av_clip_int16(sampledat);
1518 c->status[ch].sample2 = c->status[ch].sample1;
1519 c->status[ch].sample1 = *samples++;
1525 case AV_CODEC_ID_ADPCM_DTK:
1526 for (channel = 0; channel < avctx->channels; channel++) {
1527 samples = samples_p[channel];
1529 /* Read in every sample for this channel. */
1530 for (i = 0; i < nb_samples / 28; i++) {
1533 bytestream2_skipu(&gb, 1);
1534 header = bytestream2_get_byteu(&gb);
1535 bytestream2_skipu(&gb, 3 - channel);
1537 /* Decode 28 samples. */
1538 for (n = 0; n < 28; n++) {
1539 int32_t sampledat, prev;
1541 switch (header >> 4) {
1543 prev = (c->status[channel].sample1 * 0x3c);
1546 prev = (c->status[channel].sample1 * 0x73) - (c->status[channel].sample2 * 0x34);
1549 prev = (c->status[channel].sample1 * 0x62) - (c->status[channel].sample2 * 0x37);
1555 prev = av_clip_intp2((prev + 0x20) >> 6, 21);
1557 byte = bytestream2_get_byteu(&gb);
1559 sampledat = sign_extend(byte, 4);
1561 sampledat = sign_extend(byte >> 4, 4);
1563 sampledat = (((sampledat << 12) >> (header & 0xf)) << 6) + prev;
1564 *samples++ = av_clip_int16(sampledat >> 6);
1565 c->status[channel].sample2 = c->status[channel].sample1;
1566 c->status[channel].sample1 = sampledat;
1570 bytestream2_seek(&gb, 0, SEEK_SET);
1573 case AV_CODEC_ID_ADPCM_PSX:
1574 for (channel = 0; channel < avctx->channels; channel++) {
1575 samples = samples_p[channel];
1577 /* Read in every sample for this channel. */
1578 for (i = 0; i < nb_samples / 28; i++) {
1579 int filter, shift, flag, byte;
1581 filter = bytestream2_get_byteu(&gb);
1582 shift = filter & 0xf;
1583 filter = filter >> 4;
1584 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table))
1585 return AVERROR_INVALIDDATA;
1586 flag = bytestream2_get_byteu(&gb);
1588 /* Decode 28 samples. */
1589 for (n = 0; n < 28; n++) {
1590 int sample = 0, scale;
1594 scale = sign_extend(byte >> 4, 4);
1596 byte = bytestream2_get_byteu(&gb);
1597 scale = sign_extend(byte, 4);
1600 scale = scale << 12;
1601 sample = (int)((scale >> shift) + (c->status[channel].sample1 * xa_adpcm_table[filter][0] + c->status[channel].sample2 * xa_adpcm_table[filter][1]) / 64);
1603 *samples++ = av_clip_int16(sample);
1604 c->status[channel].sample2 = c->status[channel].sample1;
1605 c->status[channel].sample1 = sample;
1615 if (avpkt->size && bytestream2_tell(&gb) == 0) {
1616 av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n");
1617 return AVERROR_INVALIDDATA;
1622 if (avpkt->size < bytestream2_tell(&gb)) {
1623 av_log(avctx, AV_LOG_ERROR, "Overread of %d < %d\n", avpkt->size, bytestream2_tell(&gb));
1627 return bytestream2_tell(&gb);
1630 static void adpcm_flush(AVCodecContext *avctx)
1632 ADPCMDecodeContext *c = avctx->priv_data;
1637 static const enum AVSampleFormat sample_fmts_s16[] = { AV_SAMPLE_FMT_S16,
1638 AV_SAMPLE_FMT_NONE };
1639 static const enum AVSampleFormat sample_fmts_s16p[] = { AV_SAMPLE_FMT_S16P,
1640 AV_SAMPLE_FMT_NONE };
1641 static const enum AVSampleFormat sample_fmts_both[] = { AV_SAMPLE_FMT_S16,
1643 AV_SAMPLE_FMT_NONE };
1645 #define ADPCM_DECODER(id_, sample_fmts_, name_, long_name_) \
1646 AVCodec ff_ ## name_ ## _decoder = { \
1648 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1649 .type = AVMEDIA_TYPE_AUDIO, \
1651 .priv_data_size = sizeof(ADPCMDecodeContext), \
1652 .init = adpcm_decode_init, \
1653 .decode = adpcm_decode_frame, \
1654 .flush = adpcm_flush, \
1655 .capabilities = AV_CODEC_CAP_DR1, \
1656 .sample_fmts = sample_fmts_, \
1659 /* Note: Do not forget to add new entries to the Makefile as well. */
1660 ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie");
1661 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC");
1662 ADPCM_DECODER(AV_CODEC_ID_ADPCM_AICA, sample_fmts_s16p, adpcm_aica, "ADPCM Yamaha AICA");
1663 ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology");
1664 ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK");
1665 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts");
1666 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
1667 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1");
1668 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2");
1669 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3");
1670 ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
1671 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV");
1672 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC");
1673 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
1674 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
1675 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
1676 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
1677 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
1678 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI");
1679 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime");
1680 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical");
1681 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
1682 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV");
1683 ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood");
1684 ADPCM_DECODER(AV_CODEC_ID_ADPCM_MS, sample_fmts_s16, adpcm_ms, "ADPCM Microsoft");
1685 ADPCM_DECODER(AV_CODEC_ID_ADPCM_PSX, sample_fmts_s16p, adpcm_psx, "ADPCM Playstation");
1686 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
1687 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
1688 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
1689 ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash");
1690 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP_LE, sample_fmts_s16p, adpcm_thp_le, "ADPCM Nintendo THP (little-endian)");
1691 ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo THP");
1692 ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA");
1693 ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha");