2 * Copyright (c) 2001-2003 The ffmpeg Project
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "bytestream.h"
25 #include "adpcm_data.h"
30 * First version by Francois Revol (revol@free.fr)
31 * Fringe ADPCM codecs (e.g., DK3, DK4, Westwood)
32 * by Mike Melanson (melanson@pcisys.net)
33 * CD-ROM XA ADPCM codec by BERO
34 * EA ADPCM decoder by Robin Kay (komadori@myrealbox.com)
35 * EA ADPCM R1/R2/R3 decoder by Peter Ross (pross@xvid.org)
36 * EA IMA EACS decoder by Peter Ross (pross@xvid.org)
37 * EA IMA SEAD decoder by Peter Ross (pross@xvid.org)
38 * EA ADPCM XAS decoder by Peter Ross (pross@xvid.org)
39 * MAXIS EA ADPCM decoder by Robert Marston (rmarston@gmail.com)
40 * THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl)
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 {
88 ADPCMChannelStatus status[6];
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 CODEC_ID_ADPCM_EA:
101 case CODEC_ID_ADPCM_EA_R1:
102 case CODEC_ID_ADPCM_EA_R2:
103 case CODEC_ID_ADPCM_EA_R3:
104 case CODEC_ID_ADPCM_EA_XAS:
108 if (avctx->channels < min_channels || avctx->channels > max_channels) {
109 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
110 return AVERROR(EINVAL);
113 switch(avctx->codec->id) {
114 case CODEC_ID_ADPCM_CT:
115 c->status[0].step = c->status[1].step = 511;
117 case CODEC_ID_ADPCM_IMA_WAV:
118 if (avctx->bits_per_coded_sample != 4) {
119 av_log(avctx, AV_LOG_ERROR, "Only 4-bit ADPCM IMA WAV files are supported\n");
123 case CODEC_ID_ADPCM_IMA_WS:
124 if (avctx->extradata && avctx->extradata_size == 2 * 4) {
125 c->status[0].predictor = AV_RL32(avctx->extradata);
126 c->status[1].predictor = AV_RL32(avctx->extradata + 4);
132 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
134 avcodec_get_frame_defaults(&c->frame);
135 avctx->coded_frame = &c->frame;
140 static inline short adpcm_ima_expand_nibble(ADPCMChannelStatus *c, char nibble, int shift)
144 int sign, delta, diff, step;
146 step = ff_adpcm_step_table[c->step_index];
147 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
148 if (step_index < 0) step_index = 0;
149 else if (step_index > 88) step_index = 88;
153 /* perform direct multiplication instead of series of jumps proposed by
154 * the reference ADPCM implementation since modern CPUs can do the mults
156 diff = ((2 * delta + 1) * step) >> shift;
157 predictor = c->predictor;
158 if (sign) predictor -= diff;
159 else predictor += diff;
161 c->predictor = av_clip_int16(predictor);
162 c->step_index = step_index;
164 return (short)c->predictor;
167 static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble, int shift)
173 step = ff_adpcm_step_table[c->step_index];
174 step_index = c->step_index + ff_adpcm_index_table[nibble];
175 step_index = av_clip(step_index, 0, 88);
178 if (nibble & 4) diff += step;
179 if (nibble & 2) diff += step >> 1;
180 if (nibble & 1) diff += step >> 2;
183 predictor = c->predictor - diff;
185 predictor = c->predictor + diff;
187 c->predictor = av_clip_int16(predictor);
188 c->step_index = step_index;
193 static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, char nibble)
197 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
198 predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
200 c->sample2 = c->sample1;
201 c->sample1 = av_clip_int16(predictor);
202 c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8;
203 if (c->idelta < 16) c->idelta = 16;
208 static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
210 int sign, delta, diff;
215 /* perform direct multiplication instead of series of jumps proposed by
216 * the reference ADPCM implementation since modern CPUs can do the mults
218 diff = ((2 * delta + 1) * c->step) >> 3;
219 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
220 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
221 c->predictor = av_clip_int16(c->predictor);
222 /* calculate new step and clamp it to range 511..32767 */
223 new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
224 c->step = av_clip(new_step, 511, 32767);
226 return (short)c->predictor;
229 static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble, int size, int shift)
231 int sign, delta, diff;
233 sign = nibble & (1<<(size-1));
234 delta = nibble & ((1<<(size-1))-1);
235 diff = delta << (7 + c->step + shift);
238 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
240 /* calculate new step */
241 if (delta >= (2*size - 3) && c->step < 3)
243 else if (delta == 0 && c->step > 0)
246 return (short) c->predictor;
249 static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned char nibble)
256 c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
257 c->predictor = av_clip_int16(c->predictor);
258 c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
259 c->step = av_clip(c->step, 127, 24567);
263 static void xa_decode(short *out, const unsigned char *in,
264 ADPCMChannelStatus *left, ADPCMChannelStatus *right, int inc)
267 int shift,filter,f0,f1;
273 shift = 12 - (in[4+i*2] & 15);
274 filter = in[4+i*2] >> 4;
275 f0 = xa_adpcm_table[filter][0];
276 f1 = xa_adpcm_table[filter][1];
284 t = (signed char)(d<<4)>>4;
285 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
287 s_1 = av_clip_int16(s);
292 if (inc==2) { /* stereo */
295 s_1 = right->sample1;
296 s_2 = right->sample2;
297 out = out + 1 - 28*2;
300 shift = 12 - (in[5+i*2] & 15);
301 filter = in[5+i*2] >> 4;
303 f0 = xa_adpcm_table[filter][0];
304 f1 = xa_adpcm_table[filter][1];
309 t = (signed char)d >> 4;
310 s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
312 s_1 = av_clip_int16(s);
317 if (inc==2) { /* stereo */
318 right->sample1 = s_1;
319 right->sample2 = s_2;
329 * Get the number of samples that will be decoded from the packet.
330 * In one case, this is actually the maximum number of samples possible to
331 * decode with the given buf_size.
333 * @param[out] coded_samples set to the number of samples as coded in the
334 * packet, or 0 if the codec does not encode the
335 * number of samples in each frame.
337 static int get_nb_samples(AVCodecContext *avctx, const uint8_t *buf,
338 int buf_size, int *coded_samples)
340 ADPCMDecodeContext *s = avctx->priv_data;
342 int ch = avctx->channels;
343 int has_coded_samples = 0;
351 switch (avctx->codec->id) {
352 /* constant, only check buf_size */
353 case CODEC_ID_ADPCM_EA_XAS:
354 if (buf_size < 76 * ch)
358 case CODEC_ID_ADPCM_IMA_QT:
359 if (buf_size < 34 * ch)
363 /* simple 4-bit adpcm */
364 case CODEC_ID_ADPCM_CT:
365 case CODEC_ID_ADPCM_IMA_EA_SEAD:
366 case CODEC_ID_ADPCM_IMA_WS:
367 case CODEC_ID_ADPCM_YAMAHA:
368 nb_samples = buf_size * 2 / ch;
374 /* simple 4-bit adpcm, with header */
376 switch (avctx->codec->id) {
377 case CODEC_ID_ADPCM_4XM:
378 case CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
379 case CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break;
380 case CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4; break;
383 return (buf_size - header_size) * 2 / ch;
385 /* more complex formats */
386 switch (avctx->codec->id) {
387 case CODEC_ID_ADPCM_EA:
388 has_coded_samples = 1;
391 *coded_samples = AV_RL32(buf);
392 *coded_samples -= *coded_samples % 28;
393 nb_samples = (buf_size - 12) / 30 * 28;
395 case CODEC_ID_ADPCM_IMA_EA_EACS:
396 has_coded_samples = 1;
399 *coded_samples = AV_RL32(buf);
400 nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch;
402 case CODEC_ID_ADPCM_EA_MAXIS_XA:
403 nb_samples = ((buf_size - ch) / (2 * ch)) * 2 * ch;
405 case CODEC_ID_ADPCM_EA_R1:
406 case CODEC_ID_ADPCM_EA_R2:
407 case CODEC_ID_ADPCM_EA_R3:
408 /* maximum number of samples */
409 /* has internal offsets and a per-frame switch to signal raw 16-bit */
410 has_coded_samples = 1;
413 switch (avctx->codec->id) {
414 case CODEC_ID_ADPCM_EA_R1:
415 header_size = 4 + 9 * ch;
416 *coded_samples = AV_RL32(buf);
418 case CODEC_ID_ADPCM_EA_R2:
419 header_size = 4 + 5 * ch;
420 *coded_samples = AV_RL32(buf);
422 case CODEC_ID_ADPCM_EA_R3:
423 header_size = 4 + 5 * ch;
424 *coded_samples = AV_RB32(buf);
427 *coded_samples -= *coded_samples % 28;
428 nb_samples = (buf_size - header_size) * 2 / ch;
429 nb_samples -= nb_samples % 28;
431 case CODEC_ID_ADPCM_IMA_DK3:
432 if (avctx->block_align > 0)
433 buf_size = FFMIN(buf_size, avctx->block_align);
434 nb_samples = ((buf_size - 16) * 8 / 3) / ch;
436 case CODEC_ID_ADPCM_IMA_DK4:
437 nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch;
439 case CODEC_ID_ADPCM_IMA_WAV:
440 if (avctx->block_align > 0)
441 buf_size = FFMIN(buf_size, avctx->block_align);
442 nb_samples = 1 + (buf_size - 4 * ch) / (4 * ch) * 8;
444 case CODEC_ID_ADPCM_MS:
445 if (avctx->block_align > 0)
446 buf_size = FFMIN(buf_size, avctx->block_align);
447 nb_samples = 2 + (buf_size - 7 * ch) * 2 / ch;
449 case CODEC_ID_ADPCM_SBPRO_2:
450 case CODEC_ID_ADPCM_SBPRO_3:
451 case CODEC_ID_ADPCM_SBPRO_4:
453 int samples_per_byte;
454 switch (avctx->codec->id) {
455 case CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break;
456 case CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break;
457 case CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break;
459 if (!s->status[0].step_index) {
463 nb_samples += buf_size * samples_per_byte / ch;
466 case CODEC_ID_ADPCM_SWF:
468 int buf_bits = buf_size * 8 - 2;
469 int nbits = (buf[0] >> 6) + 2;
470 int block_hdr_size = 22 * ch;
471 int block_size = block_hdr_size + nbits * ch * 4095;
472 int nblocks = buf_bits / block_size;
473 int bits_left = buf_bits - nblocks * block_size;
474 nb_samples = nblocks * 4096;
475 if (bits_left >= block_hdr_size)
476 nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch);
479 case CODEC_ID_ADPCM_THP:
480 has_coded_samples = 1;
483 *coded_samples = AV_RB32(&buf[4]);
484 *coded_samples -= *coded_samples % 14;
485 nb_samples = (buf_size - 80) / (8 * ch) * 14;
487 case CODEC_ID_ADPCM_XA:
488 nb_samples = (buf_size / 128) * 224 / ch;
492 /* validate coded sample count */
493 if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
494 return AVERROR_INVALIDDATA;
499 /* DK3 ADPCM support macro */
500 #define DK3_GET_NEXT_NIBBLE() \
501 if (decode_top_nibble_next) \
503 nibble = last_byte >> 4; \
504 decode_top_nibble_next = 0; \
510 last_byte = *src++; \
511 if (src >= buf + buf_size) \
513 nibble = last_byte & 0x0F; \
514 decode_top_nibble_next = 1; \
517 static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
518 int *got_frame_ptr, AVPacket *avpkt)
520 const uint8_t *buf = avpkt->data;
521 int buf_size = avpkt->size;
522 ADPCMDecodeContext *c = avctx->priv_data;
523 ADPCMChannelStatus *cs;
524 int n, m, channel, i;
529 int nb_samples, coded_samples, ret;
531 nb_samples = get_nb_samples(avctx, buf, buf_size, &coded_samples);
532 if (nb_samples <= 0) {
533 av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
534 return AVERROR_INVALIDDATA;
537 /* get output buffer */
538 c->frame.nb_samples = nb_samples;
539 if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) {
540 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
543 samples = (short *)c->frame.data[0];
545 /* use coded_samples when applicable */
546 /* it is always <= nb_samples, so the output buffer will be large enough */
548 if (coded_samples != nb_samples)
549 av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
550 c->frame.nb_samples = nb_samples = coded_samples;
555 st = avctx->channels == 2 ? 1 : 0;
557 switch(avctx->codec->id) {
558 case CODEC_ID_ADPCM_IMA_QT:
559 /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
560 Channel data is interleaved per-chunk. */
561 for (channel = 0; channel < avctx->channels; channel++) {
564 cs = &(c->status[channel]);
565 /* (pppppp) (piiiiiii) */
567 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
568 predictor = AV_RB16(src);
569 step_index = predictor & 0x7F;
574 if (cs->step_index == step_index) {
575 int diff = (int)predictor - cs->predictor;
582 cs->step_index = step_index;
583 cs->predictor = predictor;
586 if (cs->step_index > 88){
587 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", cs->step_index);
591 samples = (short *)c->frame.data[0] + channel;
593 for (m = 0; m < 32; m++) {
594 *samples = adpcm_ima_qt_expand_nibble(cs, src[0] & 0x0F, 3);
595 samples += avctx->channels;
596 *samples = adpcm_ima_qt_expand_nibble(cs, src[0] >> 4 , 3);
597 samples += avctx->channels;
602 case CODEC_ID_ADPCM_IMA_WAV:
603 if (avctx->block_align != 0 && buf_size > avctx->block_align)
604 buf_size = avctx->block_align;
606 for(i=0; i<avctx->channels; i++){
607 cs = &(c->status[i]);
608 cs->predictor = *samples++ = (int16_t)bytestream_get_le16(&src);
610 cs->step_index = *src++;
611 if (cs->step_index > 88){
612 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", cs->step_index);
615 if (*src++) av_log(avctx, AV_LOG_ERROR, "unused byte should be null but is %d!!\n", src[-1]); /* unused */
618 for (n = (nb_samples - 1) / 8; n > 0; n--) {
619 for (i = 0; i < avctx->channels; i++) {
621 for (m = 0; m < 4; m++) {
623 *samples = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
624 samples += avctx->channels;
625 *samples = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
626 samples += avctx->channels;
628 samples -= 8 * avctx->channels - 1;
630 samples += 7 * avctx->channels;
633 case CODEC_ID_ADPCM_4XM:
634 for (i = 0; i < avctx->channels; i++)
635 c->status[i].predictor= (int16_t)bytestream_get_le16(&src);
637 for (i = 0; i < avctx->channels; i++) {
638 c->status[i].step_index= (int16_t)bytestream_get_le16(&src);
639 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
642 for (i = 0; i < avctx->channels; i++) {
643 samples = (short *)c->frame.data[0] + i;
645 for (n = nb_samples >> 1; n > 0; n--, src++) {
647 *samples = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
648 samples += avctx->channels;
649 *samples = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
650 samples += avctx->channels;
654 case CODEC_ID_ADPCM_MS:
658 if (avctx->block_align != 0 && buf_size > avctx->block_align)
659 buf_size = avctx->block_align;
661 block_predictor = av_clip(*src++, 0, 6);
662 c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
663 c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
665 block_predictor = av_clip(*src++, 0, 6);
666 c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
667 c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
669 c->status[0].idelta = (int16_t)bytestream_get_le16(&src);
671 c->status[1].idelta = (int16_t)bytestream_get_le16(&src);
674 c->status[0].sample1 = bytestream_get_le16(&src);
675 if (st) c->status[1].sample1 = bytestream_get_le16(&src);
676 c->status[0].sample2 = bytestream_get_le16(&src);
677 if (st) c->status[1].sample2 = bytestream_get_le16(&src);
679 *samples++ = c->status[0].sample2;
680 if (st) *samples++ = c->status[1].sample2;
681 *samples++ = c->status[0].sample1;
682 if (st) *samples++ = c->status[1].sample1;
683 for(n = (nb_samples - 2) >> (1 - st); n > 0; n--, src++) {
684 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], src[0] >> 4 );
685 *samples++ = adpcm_ms_expand_nibble(&c->status[st], src[0] & 0x0F);
689 case CODEC_ID_ADPCM_IMA_DK4:
690 if (avctx->block_align != 0 && buf_size > avctx->block_align)
691 buf_size = avctx->block_align;
693 for (channel = 0; channel < avctx->channels; channel++) {
694 cs = &c->status[channel];
695 cs->predictor = (int16_t)bytestream_get_le16(&src);
696 cs->step_index = *src++;
698 *samples++ = cs->predictor;
700 for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
702 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
703 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
706 case CODEC_ID_ADPCM_IMA_DK3:
708 unsigned char last_byte = 0;
709 unsigned char nibble;
710 int decode_top_nibble_next = 0;
711 int end_of_packet = 0;
714 if (avctx->block_align != 0 && buf_size > avctx->block_align)
715 buf_size = avctx->block_align;
717 c->status[0].predictor = (int16_t)AV_RL16(src + 10);
718 c->status[1].predictor = (int16_t)AV_RL16(src + 12);
719 c->status[0].step_index = src[14];
720 c->status[1].step_index = src[15];
721 /* sign extend the predictors */
723 diff_channel = c->status[1].predictor;
725 /* the DK3_GET_NEXT_NIBBLE macro issues the break statement when
726 * the buffer is consumed */
729 /* for this algorithm, c->status[0] is the sum channel and
730 * c->status[1] is the diff channel */
732 /* process the first predictor of the sum channel */
733 DK3_GET_NEXT_NIBBLE();
734 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
736 /* process the diff channel predictor */
737 DK3_GET_NEXT_NIBBLE();
738 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
740 /* process the first pair of stereo PCM samples */
741 diff_channel = (diff_channel + c->status[1].predictor) / 2;
742 *samples++ = c->status[0].predictor + c->status[1].predictor;
743 *samples++ = c->status[0].predictor - c->status[1].predictor;
745 /* process the second predictor of the sum channel */
746 DK3_GET_NEXT_NIBBLE();
747 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
749 /* process the second pair of stereo PCM samples */
750 diff_channel = (diff_channel + c->status[1].predictor) / 2;
751 *samples++ = c->status[0].predictor + c->status[1].predictor;
752 *samples++ = c->status[0].predictor - c->status[1].predictor;
756 case CODEC_ID_ADPCM_IMA_ISS:
757 for (channel = 0; channel < avctx->channels; channel++) {
758 cs = &c->status[channel];
759 cs->predictor = (int16_t)bytestream_get_le16(&src);
760 cs->step_index = *src++;
764 for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
767 /* nibbles are swapped for mono */
775 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
776 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
779 case CODEC_ID_ADPCM_IMA_WS:
780 while (src < buf + buf_size) {
782 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
783 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
786 case CODEC_ID_ADPCM_XA:
787 while (buf_size >= 128) {
788 xa_decode(samples, src, &c->status[0], &c->status[1],
795 case CODEC_ID_ADPCM_IMA_EA_EACS:
796 src += 4; // skip sample count (already read)
798 for (i=0; i<=st; i++)
799 c->status[i].step_index = bytestream_get_le32(&src);
800 for (i=0; i<=st; i++)
801 c->status[i].predictor = bytestream_get_le32(&src);
803 for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
804 *samples++ = adpcm_ima_expand_nibble(&c->status[0], *src>>4, 3);
805 *samples++ = adpcm_ima_expand_nibble(&c->status[st], *src&0x0F, 3);
808 case CODEC_ID_ADPCM_IMA_EA_SEAD:
809 for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
810 *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[0] >> 4, 6);
811 *samples++ = adpcm_ima_expand_nibble(&c->status[st],src[0]&0x0F, 6);
814 case CODEC_ID_ADPCM_EA:
816 int32_t previous_left_sample, previous_right_sample;
817 int32_t current_left_sample, current_right_sample;
818 int32_t next_left_sample, next_right_sample;
819 int32_t coeff1l, coeff2l, coeff1r, coeff2r;
820 uint8_t shift_left, shift_right;
822 /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
823 each coding 28 stereo samples. */
825 if(avctx->channels != 2)
826 return AVERROR_INVALIDDATA;
828 src += 4; // skip sample count (already read)
830 current_left_sample = (int16_t)bytestream_get_le16(&src);
831 previous_left_sample = (int16_t)bytestream_get_le16(&src);
832 current_right_sample = (int16_t)bytestream_get_le16(&src);
833 previous_right_sample = (int16_t)bytestream_get_le16(&src);
835 for (count1 = 0; count1 < nb_samples / 28; count1++) {
836 coeff1l = ea_adpcm_table[ *src >> 4 ];
837 coeff2l = ea_adpcm_table[(*src >> 4 ) + 4];
838 coeff1r = ea_adpcm_table[*src & 0x0F];
839 coeff2r = ea_adpcm_table[(*src & 0x0F) + 4];
842 shift_left = 20 - (*src >> 4);
843 shift_right = 20 - (*src & 0x0F);
846 for (count2 = 0; count2 < 28; count2++) {
847 next_left_sample = sign_extend(*src >> 4, 4) << shift_left;
848 next_right_sample = sign_extend(*src, 4) << shift_right;
851 next_left_sample = (next_left_sample +
852 (current_left_sample * coeff1l) +
853 (previous_left_sample * coeff2l) + 0x80) >> 8;
854 next_right_sample = (next_right_sample +
855 (current_right_sample * coeff1r) +
856 (previous_right_sample * coeff2r) + 0x80) >> 8;
858 previous_left_sample = current_left_sample;
859 current_left_sample = av_clip_int16(next_left_sample);
860 previous_right_sample = current_right_sample;
861 current_right_sample = av_clip_int16(next_right_sample);
862 *samples++ = (unsigned short)current_left_sample;
863 *samples++ = (unsigned short)current_right_sample;
867 if (src - buf == buf_size - 2)
868 src += 2; // Skip terminating 0x0000
872 case CODEC_ID_ADPCM_EA_MAXIS_XA:
874 int coeff[2][2], shift[2];
876 for(channel = 0; channel < avctx->channels; channel++) {
878 coeff[channel][i] = ea_adpcm_table[(*src >> 4) + 4*i];
879 shift[channel] = 20 - (*src & 0x0F);
882 for (count1 = 0; count1 < nb_samples / 2; count1++) {
883 for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
884 for(channel = 0; channel < avctx->channels; channel++) {
885 int32_t sample = sign_extend(src[channel] >> i, 4) << shift[channel];
887 c->status[channel].sample1 * coeff[channel][0] +
888 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
889 c->status[channel].sample2 = c->status[channel].sample1;
890 c->status[channel].sample1 = av_clip_int16(sample);
891 *samples++ = c->status[channel].sample1;
894 src+=avctx->channels;
896 /* consume whole packet */
897 src = buf + buf_size;
900 case CODEC_ID_ADPCM_EA_R1:
901 case CODEC_ID_ADPCM_EA_R2:
902 case CODEC_ID_ADPCM_EA_R3: {
905 4chan: 0=fl, 1=rl, 2=fr, 3=rr
906 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
907 const int big_endian = avctx->codec->id == CODEC_ID_ADPCM_EA_R3;
908 int32_t previous_sample, current_sample, next_sample;
909 int32_t coeff1, coeff2;
911 unsigned int channel;
914 const uint8_t *src_end = buf + buf_size;
917 src += 4; // skip sample count (already read)
919 for (channel=0; channel<avctx->channels; channel++) {
920 int32_t offset = (big_endian ? bytestream_get_be32(&src)
921 : bytestream_get_le32(&src))
922 + (avctx->channels-channel-1) * 4;
924 if ((offset < 0) || (offset >= src_end - src - 4)) break;
926 samplesC = samples + channel;
928 if (avctx->codec->id == CODEC_ID_ADPCM_EA_R1) {
929 current_sample = (int16_t)bytestream_get_le16(&srcC);
930 previous_sample = (int16_t)bytestream_get_le16(&srcC);
932 current_sample = c->status[channel].predictor;
933 previous_sample = c->status[channel].prev_sample;
936 for (count1 = 0; count1 < nb_samples / 28; count1++) {
937 if (*srcC == 0xEE) { /* only seen in R2 and R3 */
939 if (srcC > src_end - 30*2) break;
940 current_sample = (int16_t)bytestream_get_be16(&srcC);
941 previous_sample = (int16_t)bytestream_get_be16(&srcC);
943 for (count2=0; count2<28; count2++) {
944 *samplesC = (int16_t)bytestream_get_be16(&srcC);
945 samplesC += avctx->channels;
948 coeff1 = ea_adpcm_table[ *srcC>>4 ];
949 coeff2 = ea_adpcm_table[(*srcC>>4) + 4];
950 shift = 20 - (*srcC++ & 0x0F);
952 if (srcC > src_end - 14) break;
953 for (count2=0; count2<28; count2++) {
955 next_sample = sign_extend(*srcC++, 4) << shift;
957 next_sample = sign_extend(*srcC >> 4, 4) << shift;
959 next_sample += (current_sample * coeff1) +
960 (previous_sample * coeff2);
961 next_sample = av_clip_int16(next_sample >> 8);
963 previous_sample = current_sample;
964 current_sample = next_sample;
965 *samplesC = current_sample;
966 samplesC += avctx->channels;
972 } else if (count != count1) {
973 av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
974 count = FFMAX(count, count1);
977 if (avctx->codec->id != CODEC_ID_ADPCM_EA_R1) {
978 c->status[channel].predictor = current_sample;
979 c->status[channel].prev_sample = previous_sample;
983 c->frame.nb_samples = count * 28;
987 case CODEC_ID_ADPCM_EA_XAS:
988 for (channel=0; channel<avctx->channels; channel++) {
989 int coeff[2][4], shift[4];
990 short *s2, *s = &samples[channel];
991 for (n=0; n<4; n++, s+=32*avctx->channels) {
993 coeff[i][n] = ea_adpcm_table[(src[0]&0x0F)+4*i];
994 shift[n] = 20 - (src[2] & 0x0F);
995 for (s2=s, i=0; i<2; i++, src+=2, s2+=avctx->channels)
996 s2[0] = (src[0]&0xF0) + (src[1]<<8);
999 for (m=2; m<32; m+=2) {
1000 s = &samples[m*avctx->channels + channel];
1001 for (n=0; n<4; n++, src++, s+=32*avctx->channels) {
1002 for (s2=s, i=0; i<8; i+=4, s2+=avctx->channels) {
1003 int level = sign_extend(*src >> (4 - i), 4) << shift[n];
1004 int pred = s2[-1*avctx->channels] * coeff[0][n]
1005 + s2[-2*avctx->channels] * coeff[1][n];
1006 s2[0] = av_clip_int16((level + pred + 0x80) >> 8);
1012 case CODEC_ID_ADPCM_IMA_AMV:
1013 case CODEC_ID_ADPCM_IMA_SMJPEG:
1014 if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV) {
1015 c->status[0].predictor = sign_extend(bytestream_get_le16(&src), 16);
1016 c->status[0].step_index = bytestream_get_le16(&src);
1019 c->status[0].predictor = sign_extend(bytestream_get_be16(&src), 16);
1020 c->status[0].step_index = bytestream_get_byte(&src);
1024 for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
1029 if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV)
1030 FFSWAP(char, hi, lo);
1032 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1034 *samples++ = adpcm_ima_expand_nibble(&c->status[0],
1038 case CODEC_ID_ADPCM_CT:
1039 for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
1041 *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
1042 *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
1045 case CODEC_ID_ADPCM_SBPRO_4:
1046 case CODEC_ID_ADPCM_SBPRO_3:
1047 case CODEC_ID_ADPCM_SBPRO_2:
1048 if (!c->status[0].step_index) {
1049 /* the first byte is a raw sample */
1050 *samples++ = 128 * (*src++ - 0x80);
1052 *samples++ = 128 * (*src++ - 0x80);
1053 c->status[0].step_index = 1;
1056 if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_4) {
1057 for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
1058 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1060 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1061 src[0] & 0x0F, 4, 0);
1063 } else if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_3) {
1064 for (n = nb_samples / 3; n > 0; n--, src++) {
1065 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1066 src[0] >> 5 , 3, 0);
1067 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1068 (src[0] >> 2) & 0x07, 3, 0);
1069 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1070 src[0] & 0x03, 2, 0);
1073 for (n = nb_samples >> (2 - st); n > 0; n--, src++) {
1074 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1075 src[0] >> 6 , 2, 2);
1076 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1077 (src[0] >> 4) & 0x03, 2, 2);
1078 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1079 (src[0] >> 2) & 0x03, 2, 2);
1080 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1081 src[0] & 0x03, 2, 2);
1085 case CODEC_ID_ADPCM_SWF:
1089 int k0, signmask, nb_bits, count;
1090 int size = buf_size*8;
1092 init_get_bits(&gb, buf, size);
1094 //read bits & initial values
1095 nb_bits = get_bits(&gb, 2)+2;
1096 //av_log(NULL,AV_LOG_INFO,"nb_bits: %d\n", nb_bits);
1097 table = swf_index_tables[nb_bits-2];
1098 k0 = 1 << (nb_bits-2);
1099 signmask = 1 << (nb_bits-1);
1101 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
1102 for (i = 0; i < avctx->channels; i++) {
1103 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
1104 c->status[i].step_index = get_bits(&gb, 6);
1107 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
1110 for (i = 0; i < avctx->channels; i++) {
1111 // similar to IMA adpcm
1112 int delta = get_bits(&gb, nb_bits);
1113 int step = ff_adpcm_step_table[c->status[i].step_index];
1114 long vpdiff = 0; // vpdiff = (delta+0.5)*step/4
1125 if (delta & signmask)
1126 c->status[i].predictor -= vpdiff;
1128 c->status[i].predictor += vpdiff;
1130 c->status[i].step_index += table[delta & (~signmask)];
1132 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
1133 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
1135 *samples++ = c->status[i].predictor;
1142 case CODEC_ID_ADPCM_YAMAHA:
1143 for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
1145 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
1146 *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
1149 case CODEC_ID_ADPCM_THP:
1155 src += 4; // skip channel size
1156 src += 4; // skip number of samples (already read)
1158 for (i = 0; i < 32; i++)
1159 table[0][i] = (int16_t)bytestream_get_be16(&src);
1161 /* Initialize the previous sample. */
1162 for (i = 0; i < 4; i++)
1163 prev[0][i] = (int16_t)bytestream_get_be16(&src);
1165 for (ch = 0; ch <= st; ch++) {
1166 samples = (short *)c->frame.data[0] + ch;
1168 /* Read in every sample for this channel. */
1169 for (i = 0; i < nb_samples / 14; i++) {
1170 int index = (*src >> 4) & 7;
1171 unsigned int exp = *src++ & 15;
1172 int factor1 = table[ch][index * 2];
1173 int factor2 = table[ch][index * 2 + 1];
1175 /* Decode 14 samples. */
1176 for (n = 0; n < 14; n++) {
1178 if(n&1) sampledat = sign_extend(*src++, 4);
1179 else sampledat = sign_extend(*src >> 4, 4);
1181 sampledat = ((prev[ch][0]*factor1
1182 + prev[ch][1]*factor2) >> 11) + (sampledat << exp);
1183 *samples = av_clip_int16(sampledat);
1184 prev[ch][1] = prev[ch][0];
1185 prev[ch][0] = *samples++;
1187 /* In case of stereo, skip one sample, this sample
1188 is for the other channel. */
1201 *(AVFrame *)data = c->frame;
1207 #define ADPCM_DECODER(id_, name_, long_name_) \
1208 AVCodec ff_ ## name_ ## _decoder = { \
1210 .type = AVMEDIA_TYPE_AUDIO, \
1212 .priv_data_size = sizeof(ADPCMDecodeContext), \
1213 .init = adpcm_decode_init, \
1214 .decode = adpcm_decode_frame, \
1215 .capabilities = CODEC_CAP_DR1, \
1216 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
1219 /* Note: Do not forget to add new entries to the Makefile as well. */
1220 ADPCM_DECODER(CODEC_ID_ADPCM_4XM, adpcm_4xm, "ADPCM 4X Movie");
1221 ADPCM_DECODER(CODEC_ID_ADPCM_CT, adpcm_ct, "ADPCM Creative Technology");
1222 ADPCM_DECODER(CODEC_ID_ADPCM_EA, adpcm_ea, "ADPCM Electronic Arts");
1223 ADPCM_DECODER(CODEC_ID_ADPCM_EA_MAXIS_XA, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
1224 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R1, adpcm_ea_r1, "ADPCM Electronic Arts R1");
1225 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R2, adpcm_ea_r2, "ADPCM Electronic Arts R2");
1226 ADPCM_DECODER(CODEC_ID_ADPCM_EA_R3, adpcm_ea_r3, "ADPCM Electronic Arts R3");
1227 ADPCM_DECODER(CODEC_ID_ADPCM_EA_XAS, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
1228 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv, "ADPCM IMA AMV");
1229 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
1230 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
1231 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
1232 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
1233 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_ISS, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
1234 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt, "ADPCM IMA QuickTime");
1235 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
1236 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav, "ADPCM IMA WAV");
1237 ADPCM_DECODER(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws, "ADPCM IMA Westwood");
1238 ADPCM_DECODER(CODEC_ID_ADPCM_MS, adpcm_ms, "ADPCM Microsoft");
1239 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
1240 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
1241 ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
1242 ADPCM_DECODER(CODEC_ID_ADPCM_SWF, adpcm_swf, "ADPCM Shockwave Flash");
1243 ADPCM_DECODER(CODEC_ID_ADPCM_THP, adpcm_thp, "ADPCM Nintendo Gamecube THP");
1244 ADPCM_DECODER(CODEC_ID_ADPCM_XA, adpcm_xa, "ADPCM CDROM XA");
1245 ADPCM_DECODER(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha, "ADPCM Yamaha");