/*
- * ADPCM codecs
* Copyright (c) 2001-2003 The ffmpeg Project
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avcodec.h"
-#include "bitstream.h"
+#include "get_bits.h"
+#include "put_bits.h"
#include "bytestream.h"
+#include "adpcm.h"
+#include "adpcm_data.h"
/**
- * @file adpcm.c
- * ADPCM codecs.
+ * @file
+ * ADPCM decoders
* First version by Francois Revol (revol@free.fr)
* Fringe ADPCM codecs (e.g., DK3, DK4, Westwood)
* by Mike Melanson (melanson@pcisys.net)
* EA IMA EACS decoder by Peter Ross (pross@xvid.org)
* EA IMA SEAD decoder by Peter Ross (pross@xvid.org)
* EA ADPCM XAS decoder by Peter Ross (pross@xvid.org)
+ * MAXIS EA ADPCM decoder by Robert Marston (rmarston@gmail.com)
* THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl)
*
* Features and limitations:
*
* Reference documents:
- * http://www.pcisys.net/~melanson/codecs/simpleaudio.html
- * http://www.geocities.com/SiliconValley/8682/aud3.txt
- * http://openquicktime.sourceforge.net/plugins.htm
- * XAnim sources (xa_codec.c) http://www.rasnaimaging.com/people/lapus/download.html
- * http://www.cs.ucla.edu/~leec/mediabench/applications.html
- * SoX source code http://home.sprynet.com/~cbagwell/sox.html
+ * http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs
+ * http://www.pcisys.net/~melanson/codecs/simpleaudio.html [dead]
+ * http://www.geocities.com/SiliconValley/8682/aud3.txt [dead]
+ * http://openquicktime.sourceforge.net/
+ * XAnim sources (xa_codec.c) http://xanim.polter.net/
+ * http://www.cs.ucla.edu/~leec/mediabench/applications.html [dead]
+ * SoX source code http://sox.sourceforge.net/
*
* CD-ROM XA:
- * http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html
- * vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html
+ * http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html [dead]
+ * vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html [dead]
* readstr http://www.geocities.co.jp/Playtown/2004/
*/
-#define BLKSIZE 1024
-
-/* step_table[] and index_table[] are from the ADPCM reference source */
-/* This is the index table: */
-static const int index_table[16] = {
- -1, -1, -1, -1, 2, 4, 6, 8,
- -1, -1, -1, -1, 2, 4, 6, 8,
-};
-
-/**
- * This is the step table. Note that many programs use slight deviations from
- * this table, but such deviations are negligible:
- */
-static const int step_table[89] = {
- 7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
- 19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
- 50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
- 130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
- 337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
- 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
- 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
- 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
- 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
-};
-
-/* These are for MS-ADPCM */
-/* AdaptationTable[], AdaptCoeff1[], and AdaptCoeff2[] are from libsndfile */
-static const int AdaptationTable[] = {
- 230, 230, 230, 230, 307, 409, 512, 614,
- 768, 614, 512, 409, 307, 230, 230, 230
-};
-
-static const int AdaptCoeff1[] = {
- 256, 512, 0, 192, 240, 460, 392
-};
-
-static const int AdaptCoeff2[] = {
- 0, -256, 0, 64, 0, -208, -232
-};
-
/* These are for CD-ROM XA ADPCM */
static const int xa_adpcm_table[5][2] = {
- { 0, 0 },
- { 60, 0 },
- { 115, -52 },
- { 98, -55 },
- { 122, -60 }
+ { 0, 0 },
+ { 60, 0 },
+ { 115, -52 },
+ { 98, -55 },
+ { 122, -60 }
};
static const int ea_adpcm_table[] = {
- 0, 240, 460, 392, 0, 0, -208, -220, 0, 1,
- 3, 4, 7, 8, 10, 11, 0, -1, -3, -4
-};
-
-static const int ct_adpcm_table[8] = {
- 0x00E6, 0x00E6, 0x00E6, 0x00E6,
- 0x0133, 0x0199, 0x0200, 0x0266
+ 0, 240, 460, 392,
+ 0, 0, -208, -220,
+ 0, 1, 3, 4,
+ 7, 8, 10, 11,
+ 0, -1, -3, -4
};
// padded to zero where table size is less then 16
/*5*/ { -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16 }
};
-static const int yamaha_indexscale[] = {
- 230, 230, 230, 230, 307, 409, 512, 614,
- 230, 230, 230, 230, 307, 409, 512, 614
-};
-
-static const int yamaha_difflookup[] = {
- 1, 3, 5, 7, 9, 11, 13, 15,
- -1, -3, -5, -7, -9, -11, -13, -15
-};
-
/* end of tables */
-typedef struct ADPCMChannelStatus {
- int predictor;
- short int step_index;
- int step;
- /* for encoding */
- int prev_sample;
-
- /* MS version */
- short sample1;
- short sample2;
- int coeff1;
- int coeff2;
- int idelta;
-} ADPCMChannelStatus;
-
-typedef struct ADPCMContext {
- int channel; /* for stereo MOVs, decode left, then decode right, then tell it's decoded */
+typedef struct ADPCMDecodeContext {
+ AVFrame frame;
ADPCMChannelStatus status[6];
-} ADPCMContext;
-
-/* XXX: implement encoding */
-
-#ifdef CONFIG_ENCODERS
-static int adpcm_encode_init(AVCodecContext *avctx)
-{
- if (avctx->channels > 2)
- return -1; /* only stereo or mono =) */
- switch(avctx->codec->id) {
- case CODEC_ID_ADPCM_IMA_WAV:
- avctx->frame_size = (BLKSIZE - 4 * avctx->channels) * 8 / (4 * avctx->channels) + 1; /* each 16 bits sample gives one nibble */
- /* and we have 4 bytes per channel overhead */
- avctx->block_align = BLKSIZE;
- /* seems frame_size isn't taken into account... have to buffer the samples :-( */
- break;
- case CODEC_ID_ADPCM_IMA_QT:
- avctx->frame_size = 64;
- avctx->block_align = 34 * avctx->channels;
- break;
- case CODEC_ID_ADPCM_MS:
- avctx->frame_size = (BLKSIZE - 7 * avctx->channels) * 2 / avctx->channels + 2; /* each 16 bits sample gives one nibble */
- /* and we have 7 bytes per channel overhead */
- avctx->block_align = BLKSIZE;
- break;
- case CODEC_ID_ADPCM_YAMAHA:
- avctx->frame_size = BLKSIZE * avctx->channels;
- avctx->block_align = BLKSIZE;
- break;
- case CODEC_ID_ADPCM_SWF:
- if (avctx->sample_rate != 11025 &&
- avctx->sample_rate != 22050 &&
- avctx->sample_rate != 44100) {
- av_log(avctx, AV_LOG_ERROR, "Sample rate must be 11025, 22050 or 44100\n");
- return -1;
- }
- avctx->frame_size = 512 * (avctx->sample_rate / 11025);
- break;
- default:
- return -1;
- break;
- }
-
- avctx->coded_frame= avcodec_alloc_frame();
- avctx->coded_frame->key_frame= 1;
-
- return 0;
-}
-
-static int adpcm_encode_close(AVCodecContext *avctx)
-{
- av_freep(&avctx->coded_frame);
-
- return 0;
-}
-
-
-static inline unsigned char adpcm_ima_compress_sample(ADPCMChannelStatus *c, short sample)
-{
- int delta = sample - c->prev_sample;
- int nibble = FFMIN(7, abs(delta)*4/step_table[c->step_index]) + (delta<0)*8;
- c->prev_sample += ((step_table[c->step_index] * yamaha_difflookup[nibble]) / 8);
- c->prev_sample = av_clip_int16(c->prev_sample);
- c->step_index = av_clip(c->step_index + index_table[nibble], 0, 88);
- return nibble;
-}
-
-static inline unsigned char adpcm_ms_compress_sample(ADPCMChannelStatus *c, short sample)
-{
- int predictor, nibble, bias;
-
- predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 256;
-
- nibble= sample - predictor;
- if(nibble>=0) bias= c->idelta/2;
- else bias=-c->idelta/2;
-
- nibble= (nibble + bias) / c->idelta;
- nibble= av_clip(nibble, -8, 7)&0x0F;
-
- predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
-
- c->sample2 = c->sample1;
- c->sample1 = av_clip_int16(predictor);
-
- c->idelta = (AdaptationTable[(int)nibble] * c->idelta) >> 8;
- if (c->idelta < 16) c->idelta = 16;
-
- return nibble;
-}
-
-static inline unsigned char adpcm_yamaha_compress_sample(ADPCMChannelStatus *c, short sample)
-{
- int nibble, delta;
-
- if(!c->step) {
- c->predictor = 0;
- c->step = 127;
- }
-
- delta = sample - c->predictor;
-
- nibble = FFMIN(7, abs(delta)*4/c->step) + (delta<0)*8;
-
- c->predictor += ((c->step * yamaha_difflookup[nibble]) / 8);
- c->predictor = av_clip_int16(c->predictor);
- c->step = (c->step * yamaha_indexscale[nibble]) >> 8;
- c->step = av_clip(c->step, 127, 24567);
-
- return nibble;
-}
-
-typedef struct TrellisPath {
- int nibble;
- int prev;
-} TrellisPath;
-
-typedef struct TrellisNode {
- uint32_t ssd;
- int path;
- int sample1;
- int sample2;
- int step;
-} TrellisNode;
-
-static void adpcm_compress_trellis(AVCodecContext *avctx, const short *samples,
- uint8_t *dst, ADPCMChannelStatus *c, int n)
-{
-#define FREEZE_INTERVAL 128
- //FIXME 6% faster if frontier is a compile-time constant
- const int frontier = 1 << avctx->trellis;
- const int stride = avctx->channels;
- const int version = avctx->codec->id;
- const int max_paths = frontier*FREEZE_INTERVAL;
- TrellisPath paths[max_paths], *p;
- TrellisNode node_buf[2][frontier];
- TrellisNode *nodep_buf[2][frontier];
- TrellisNode **nodes = nodep_buf[0]; // nodes[] is always sorted by .ssd
- TrellisNode **nodes_next = nodep_buf[1];
- int pathn = 0, froze = -1, i, j, k;
-
- assert(!(max_paths&(max_paths-1)));
-
- memset(nodep_buf, 0, sizeof(nodep_buf));
- nodes[0] = &node_buf[1][0];
- nodes[0]->ssd = 0;
- nodes[0]->path = 0;
- nodes[0]->step = c->step_index;
- nodes[0]->sample1 = c->sample1;
- nodes[0]->sample2 = c->sample2;
- if((version == CODEC_ID_ADPCM_IMA_WAV) || (version == CODEC_ID_ADPCM_IMA_QT) || (version == CODEC_ID_ADPCM_SWF))
- nodes[0]->sample1 = c->prev_sample;
- if(version == CODEC_ID_ADPCM_MS)
- nodes[0]->step = c->idelta;
- if(version == CODEC_ID_ADPCM_YAMAHA) {
- if(c->step == 0) {
- nodes[0]->step = 127;
- nodes[0]->sample1 = 0;
- } else {
- nodes[0]->step = c->step;
- nodes[0]->sample1 = c->predictor;
- }
- }
-
- for(i=0; i<n; i++) {
- TrellisNode *t = node_buf[i&1];
- TrellisNode **u;
- int sample = samples[i*stride];
- memset(nodes_next, 0, frontier*sizeof(TrellisNode*));
- for(j=0; j<frontier && nodes[j]; j++) {
- // higher j have higher ssd already, so they're unlikely to use a suboptimal next sample too
- const int range = (j < frontier/2) ? 1 : 0;
- const int step = nodes[j]->step;
- int nidx;
- if(version == CODEC_ID_ADPCM_MS) {
- const int predictor = ((nodes[j]->sample1 * c->coeff1) + (nodes[j]->sample2 * c->coeff2)) / 256;
- const int div = (sample - predictor) / step;
- const int nmin = av_clip(div-range, -8, 6);
- const int nmax = av_clip(div+range, -7, 7);
- for(nidx=nmin; nidx<=nmax; nidx++) {
- const int nibble = nidx & 0xf;
- int dec_sample = predictor + nidx * step;
-#define STORE_NODE(NAME, STEP_INDEX)\
- int d;\
- uint32_t ssd;\
- dec_sample = av_clip_int16(dec_sample);\
- d = sample - dec_sample;\
- ssd = nodes[j]->ssd + d*d;\
- if(nodes_next[frontier-1] && ssd >= nodes_next[frontier-1]->ssd)\
- continue;\
- /* Collapse any two states with the same previous sample value. \
- * One could also distinguish states by step and by 2nd to last
- * sample, but the effects of that are negligible. */\
- for(k=0; k<frontier && nodes_next[k]; k++) {\
- if(dec_sample == nodes_next[k]->sample1) {\
- assert(ssd >= nodes_next[k]->ssd);\
- goto next_##NAME;\
- }\
- }\
- for(k=0; k<frontier; k++) {\
- if(!nodes_next[k] || ssd < nodes_next[k]->ssd) {\
- TrellisNode *u = nodes_next[frontier-1];\
- if(!u) {\
- assert(pathn < max_paths);\
- u = t++;\
- u->path = pathn++;\
- }\
- u->ssd = ssd;\
- u->step = STEP_INDEX;\
- u->sample2 = nodes[j]->sample1;\
- u->sample1 = dec_sample;\
- paths[u->path].nibble = nibble;\
- paths[u->path].prev = nodes[j]->path;\
- memmove(&nodes_next[k+1], &nodes_next[k], (frontier-k-1)*sizeof(TrellisNode*));\
- nodes_next[k] = u;\
- break;\
- }\
- }\
- next_##NAME:;
- STORE_NODE(ms, FFMAX(16, (AdaptationTable[nibble] * step) >> 8));
- }
- } else if((version == CODEC_ID_ADPCM_IMA_WAV)|| (version == CODEC_ID_ADPCM_IMA_QT)|| (version == CODEC_ID_ADPCM_SWF)) {
-#define LOOP_NODES(NAME, STEP_TABLE, STEP_INDEX)\
- const int predictor = nodes[j]->sample1;\
- const int div = (sample - predictor) * 4 / STEP_TABLE;\
- int nmin = av_clip(div-range, -7, 6);\
- int nmax = av_clip(div+range, -6, 7);\
- if(nmin<=0) nmin--; /* distinguish -0 from +0 */\
- if(nmax<0) nmax--;\
- for(nidx=nmin; nidx<=nmax; nidx++) {\
- const int nibble = nidx<0 ? 7-nidx : nidx;\
- int dec_sample = predictor + (STEP_TABLE * yamaha_difflookup[nibble]) / 8;\
- STORE_NODE(NAME, STEP_INDEX);\
- }
- LOOP_NODES(ima, step_table[step], av_clip(step + index_table[nibble], 0, 88));
- } else { //CODEC_ID_ADPCM_YAMAHA
- LOOP_NODES(yamaha, step, av_clip((step * yamaha_indexscale[nibble]) >> 8, 127, 24567));
-#undef LOOP_NODES
-#undef STORE_NODE
- }
- }
-
- u = nodes;
- nodes = nodes_next;
- nodes_next = u;
-
- // prevent overflow
- if(nodes[0]->ssd > (1<<28)) {
- for(j=1; j<frontier && nodes[j]; j++)
- nodes[j]->ssd -= nodes[0]->ssd;
- nodes[0]->ssd = 0;
- }
-
- // merge old paths to save memory
- if(i == froze + FREEZE_INTERVAL) {
- p = &paths[nodes[0]->path];
- for(k=i; k>froze; k--) {
- dst[k] = p->nibble;
- p = &paths[p->prev];
- }
- froze = i;
- pathn = 0;
- // other nodes might use paths that don't coincide with the frozen one.
- // checking which nodes do so is too slow, so just kill them all.
- // this also slightly improves quality, but I don't know why.
- memset(nodes+1, 0, (frontier-1)*sizeof(TrellisNode*));
- }
- }
-
- p = &paths[nodes[0]->path];
- for(i=n-1; i>froze; i--) {
- dst[i] = p->nibble;
- p = &paths[p->prev];
- }
-
- c->predictor = nodes[0]->sample1;
- c->sample1 = nodes[0]->sample1;
- c->sample2 = nodes[0]->sample2;
- c->step_index = nodes[0]->step;
- c->step = nodes[0]->step;
- c->idelta = nodes[0]->step;
-}
-
-static int adpcm_encode_frame(AVCodecContext *avctx,
- unsigned char *frame, int buf_size, void *data)
-{
- int n, i, st;
- short *samples;
- unsigned char *dst;
- ADPCMContext *c = avctx->priv_data;
-
- dst = frame;
- samples = (short *)data;
- st= avctx->channels == 2;
-/* n = (BLKSIZE - 4 * avctx->channels) / (2 * 8 * avctx->channels); */
-
- switch(avctx->codec->id) {
- case CODEC_ID_ADPCM_IMA_WAV:
- n = avctx->frame_size / 8;
- c->status[0].prev_sample = (signed short)samples[0]; /* XXX */
-/* c->status[0].step_index = 0; *//* XXX: not sure how to init the state machine */
- bytestream_put_le16(&dst, c->status[0].prev_sample);
- *dst++ = (unsigned char)c->status[0].step_index;
- *dst++ = 0; /* unknown */
- samples++;
- if (avctx->channels == 2) {
- c->status[1].prev_sample = (signed short)samples[0];
-/* c->status[1].step_index = 0; */
- bytestream_put_le16(&dst, c->status[1].prev_sample);
- *dst++ = (unsigned char)c->status[1].step_index;
- *dst++ = 0;
- samples++;
- }
-
- /* stereo: 4 bytes (8 samples) for left, 4 bytes for right, 4 bytes left, ... */
- if(avctx->trellis > 0) {
- uint8_t buf[2][n*8];
- adpcm_compress_trellis(avctx, samples, buf[0], &c->status[0], n*8);
- if(avctx->channels == 2)
- adpcm_compress_trellis(avctx, samples+1, buf[1], &c->status[1], n*8);
- for(i=0; i<n; i++) {
- *dst++ = buf[0][8*i+0] | (buf[0][8*i+1] << 4);
- *dst++ = buf[0][8*i+2] | (buf[0][8*i+3] << 4);
- *dst++ = buf[0][8*i+4] | (buf[0][8*i+5] << 4);
- *dst++ = buf[0][8*i+6] | (buf[0][8*i+7] << 4);
- if (avctx->channels == 2) {
- *dst++ = buf[1][8*i+0] | (buf[1][8*i+1] << 4);
- *dst++ = buf[1][8*i+2] | (buf[1][8*i+3] << 4);
- *dst++ = buf[1][8*i+4] | (buf[1][8*i+5] << 4);
- *dst++ = buf[1][8*i+6] | (buf[1][8*i+7] << 4);
- }
- }
- } else
- for (; n>0; n--) {
- *dst = adpcm_ima_compress_sample(&c->status[0], samples[0]);
- *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels]) << 4;
- dst++;
- *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 2]);
- *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 3]) << 4;
- dst++;
- *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 4]);
- *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 5]) << 4;
- dst++;
- *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 6]);
- *dst |= adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 7]) << 4;
- dst++;
- /* right channel */
- if (avctx->channels == 2) {
- *dst = adpcm_ima_compress_sample(&c->status[1], samples[1]);
- *dst |= adpcm_ima_compress_sample(&c->status[1], samples[3]) << 4;
- dst++;
- *dst = adpcm_ima_compress_sample(&c->status[1], samples[5]);
- *dst |= adpcm_ima_compress_sample(&c->status[1], samples[7]) << 4;
- dst++;
- *dst = adpcm_ima_compress_sample(&c->status[1], samples[9]);
- *dst |= adpcm_ima_compress_sample(&c->status[1], samples[11]) << 4;
- dst++;
- *dst = adpcm_ima_compress_sample(&c->status[1], samples[13]);
- *dst |= adpcm_ima_compress_sample(&c->status[1], samples[15]) << 4;
- dst++;
- }
- samples += 8 * avctx->channels;
- }
- break;
- case CODEC_ID_ADPCM_IMA_QT:
- {
- int ch, i;
- PutBitContext pb;
- init_put_bits(&pb, dst, buf_size*8);
-
- for(ch=0; ch<avctx->channels; ch++){
- put_bits(&pb, 9, (c->status[ch].prev_sample + 0x10000) >> 7);
- put_bits(&pb, 7, c->status[ch].step_index);
- if(avctx->trellis > 0) {
- uint8_t buf[64];
- adpcm_compress_trellis(avctx, samples+ch, buf, &c->status[ch], 64);
- for(i=0; i<64; i++)
- put_bits(&pb, 4, buf[i^1]);
- c->status[ch].prev_sample = c->status[ch].predictor & ~0x7F;
- } else {
- for (i=0; i<64; i+=2){
- int t1, t2;
- t1 = adpcm_ima_compress_sample(&c->status[ch], samples[avctx->channels*(i+0)+ch]);
- t2 = adpcm_ima_compress_sample(&c->status[ch], samples[avctx->channels*(i+1)+ch]);
- put_bits(&pb, 4, t2);
- put_bits(&pb, 4, t1);
- }
- c->status[ch].prev_sample &= ~0x7F;
- }
- }
-
- dst += put_bits_count(&pb)>>3;
- break;
- }
- case CODEC_ID_ADPCM_SWF:
- {
- int i;
- PutBitContext pb;
- init_put_bits(&pb, dst, buf_size*8);
-
- n = avctx->frame_size-1;
-
- //Store AdpcmCodeSize
- put_bits(&pb, 2, 2); //Set 4bits flash adpcm format
-
- //Init the encoder state
- for(i=0; i<avctx->channels; i++){
- c->status[i].step_index = av_clip(c->status[i].step_index, 0, 63); // clip step so it fits 6 bits
- put_bits(&pb, 16, samples[i] & 0xFFFF);
- put_bits(&pb, 6, c->status[i].step_index);
- c->status[i].prev_sample = (signed short)samples[i];
- }
-
- if(avctx->trellis > 0) {
- uint8_t buf[2][n];
- adpcm_compress_trellis(avctx, samples+2, buf[0], &c->status[0], n);
- if (avctx->channels == 2)
- adpcm_compress_trellis(avctx, samples+3, buf[1], &c->status[1], n);
- for(i=0; i<n; i++) {
- put_bits(&pb, 4, buf[0][i]);
- if (avctx->channels == 2)
- put_bits(&pb, 4, buf[1][i]);
- }
- } else {
- for (i=1; i<avctx->frame_size; i++) {
- put_bits(&pb, 4, adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels*i]));
- if (avctx->channels == 2)
- put_bits(&pb, 4, adpcm_ima_compress_sample(&c->status[1], samples[2*i+1]));
- }
- }
- flush_put_bits(&pb);
- dst += put_bits_count(&pb)>>3;
- break;
- }
- case CODEC_ID_ADPCM_MS:
- for(i=0; i<avctx->channels; i++){
- int predictor=0;
-
- *dst++ = predictor;
- c->status[i].coeff1 = AdaptCoeff1[predictor];
- c->status[i].coeff2 = AdaptCoeff2[predictor];
- }
- for(i=0; i<avctx->channels; i++){
- if (c->status[i].idelta < 16)
- c->status[i].idelta = 16;
-
- bytestream_put_le16(&dst, c->status[i].idelta);
- }
- for(i=0; i<avctx->channels; i++){
- c->status[i].sample1= *samples++;
-
- bytestream_put_le16(&dst, c->status[i].sample1);
- }
- for(i=0; i<avctx->channels; i++){
- c->status[i].sample2= *samples++;
-
- bytestream_put_le16(&dst, c->status[i].sample2);
- }
-
- if(avctx->trellis > 0) {
- int n = avctx->block_align - 7*avctx->channels;
- uint8_t buf[2][n];
- if(avctx->channels == 1) {
- n *= 2;
- adpcm_compress_trellis(avctx, samples, buf[0], &c->status[0], n);
- for(i=0; i<n; i+=2)
- *dst++ = (buf[0][i] << 4) | buf[0][i+1];
- } else {
- adpcm_compress_trellis(avctx, samples, buf[0], &c->status[0], n);
- adpcm_compress_trellis(avctx, samples+1, buf[1], &c->status[1], n);
- for(i=0; i<n; i++)
- *dst++ = (buf[0][i] << 4) | buf[1][i];
- }
- } else
- for(i=7*avctx->channels; i<avctx->block_align; i++) {
- int nibble;
- nibble = adpcm_ms_compress_sample(&c->status[ 0], *samples++)<<4;
- nibble|= adpcm_ms_compress_sample(&c->status[st], *samples++);
- *dst++ = nibble;
- }
- break;
- case CODEC_ID_ADPCM_YAMAHA:
- n = avctx->frame_size / 2;
- if(avctx->trellis > 0) {
- uint8_t buf[2][n*2];
- n *= 2;
- if(avctx->channels == 1) {
- adpcm_compress_trellis(avctx, samples, buf[0], &c->status[0], n);
- for(i=0; i<n; i+=2)
- *dst++ = buf[0][i] | (buf[0][i+1] << 4);
- } else {
- adpcm_compress_trellis(avctx, samples, buf[0], &c->status[0], n);
- adpcm_compress_trellis(avctx, samples+1, buf[1], &c->status[1], n);
- for(i=0; i<n; i++)
- *dst++ = buf[0][i] | (buf[1][i] << 4);
- }
- } else
- for (; n>0; n--) {
- for(i = 0; i < avctx->channels; i++) {
- int nibble;
- nibble = adpcm_yamaha_compress_sample(&c->status[i], samples[i]);
- nibble |= adpcm_yamaha_compress_sample(&c->status[i], samples[i+avctx->channels]) << 4;
- *dst++ = nibble;
- }
- samples += 2 * avctx->channels;
- }
- break;
- default:
- return -1;
- }
- return dst - frame;
-}
-#endif //CONFIG_ENCODERS
+} ADPCMDecodeContext;
static av_cold int adpcm_decode_init(AVCodecContext * avctx)
{
- ADPCMContext *c = avctx->priv_data;
+ ADPCMDecodeContext *c = avctx->priv_data;
unsigned int max_channels = 2;
switch(avctx->codec->id) {
case CODEC_ID_ADPCM_EA_R1:
case CODEC_ID_ADPCM_EA_R2:
case CODEC_ID_ADPCM_EA_R3:
+ case CODEC_ID_ADPCM_EA_XAS:
max_channels = 6;
break;
}
case CODEC_ID_ADPCM_CT:
c->status[0].step = c->status[1].step = 511;
break;
+ case CODEC_ID_ADPCM_IMA_WAV:
+ if (avctx->bits_per_coded_sample != 4) {
+ av_log(avctx, AV_LOG_ERROR, "Only 4-bit ADPCM IMA WAV files are supported\n");
+ return -1;
+ }
+ break;
case CODEC_ID_ADPCM_IMA_WS:
if (avctx->extradata && avctx->extradata_size == 2 * 4) {
c->status[0].predictor = AV_RL32(avctx->extradata);
default:
break;
}
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+
+ avcodec_get_frame_defaults(&c->frame);
+ avctx->coded_frame = &c->frame;
+
return 0;
}
int predictor;
int sign, delta, diff, step;
- step = step_table[c->step_index];
- step_index = c->step_index + index_table[(unsigned)nibble];
+ step = ff_adpcm_step_table[c->step_index];
+ step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
if (step_index < 0) step_index = 0;
else if (step_index > 88) step_index = 88;
return (short)c->predictor;
}
+static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble, int shift)
+{
+ int step_index;
+ int predictor;
+ int diff, step;
+
+ step = ff_adpcm_step_table[c->step_index];
+ step_index = c->step_index + ff_adpcm_index_table[nibble];
+ step_index = av_clip(step_index, 0, 88);
+
+ diff = step >> 3;
+ if (nibble & 4) diff += step;
+ if (nibble & 2) diff += step >> 1;
+ if (nibble & 1) diff += step >> 2;
+
+ if (nibble & 8)
+ predictor = c->predictor - diff;
+ else
+ predictor = c->predictor + diff;
+
+ c->predictor = av_clip_int16(predictor);
+ c->step_index = step_index;
+
+ return c->predictor;
+}
+
static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, char nibble)
{
int predictor;
- predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 256;
+ predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
c->sample2 = c->sample1;
c->sample1 = av_clip_int16(predictor);
- c->idelta = (AdaptationTable[(int)nibble] * c->idelta) >> 8;
+ c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8;
if (c->idelta < 16) c->idelta = 16;
return c->sample1;
c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
c->predictor = av_clip_int16(c->predictor);
/* calculate new step and clamp it to range 511..32767 */
- new_step = (ct_adpcm_table[nibble & 7] * c->step) >> 8;
+ new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
c->step = av_clip(new_step, 511, 32767);
return (short)c->predictor;
c->step = 127;
}
- c->predictor += (c->step * yamaha_difflookup[nibble]) / 8;
+ c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
c->predictor = av_clip_int16(c->predictor);
- c->step = (c->step * yamaha_indexscale[nibble]) >> 8;
+ c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
c->step = av_clip(c->step, 127, 24567);
return c->predictor;
}
}
}
+/**
+ * Get the number of samples that will be decoded from the packet.
+ * In one case, this is actually the maximum number of samples possible to
+ * decode with the given buf_size.
+ *
+ * @param[out] coded_samples set to the number of samples as coded in the
+ * packet, or 0 if the codec does not encode the
+ * number of samples in each frame.
+ */
+static int get_nb_samples(AVCodecContext *avctx, const uint8_t *buf,
+ int buf_size, int *coded_samples)
+{
+ ADPCMDecodeContext *s = avctx->priv_data;
+ int nb_samples = 0;
+ int ch = avctx->channels;
+ int has_coded_samples = 0;
+ int header_size;
+
+ *coded_samples = 0;
+
+ switch (avctx->codec->id) {
+ /* constant, only check buf_size */
+ case CODEC_ID_ADPCM_EA_XAS:
+ if (buf_size < 76 * ch)
+ return 0;
+ nb_samples = 128;
+ break;
+ case CODEC_ID_ADPCM_IMA_QT:
+ if (buf_size < 34 * ch)
+ return 0;
+ nb_samples = 64;
+ break;
+ /* simple 4-bit adpcm */
+ case CODEC_ID_ADPCM_CT:
+ case CODEC_ID_ADPCM_IMA_EA_SEAD:
+ case CODEC_ID_ADPCM_IMA_WS:
+ case CODEC_ID_ADPCM_YAMAHA:
+ nb_samples = buf_size * 2 / ch;
+ break;
+ }
+ if (nb_samples)
+ return nb_samples;
+
+ /* simple 4-bit adpcm, with header */
+ header_size = 0;
+ switch (avctx->codec->id) {
+ case CODEC_ID_ADPCM_4XM:
+ case CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
+ case CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break;
+ case CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4; break;
+ }
+ if (header_size > 0)
+ return (buf_size - header_size) * 2 / ch;
+
+ /* more complex formats */
+ switch (avctx->codec->id) {
+ case CODEC_ID_ADPCM_EA:
+ has_coded_samples = 1;
+ if (buf_size < 4)
+ return 0;
+ *coded_samples = AV_RL32(buf);
+ *coded_samples -= *coded_samples % 28;
+ nb_samples = (buf_size - 12) / 30 * 28;
+ break;
+ case CODEC_ID_ADPCM_IMA_EA_EACS:
+ has_coded_samples = 1;
+ if (buf_size < 4)
+ return 0;
+ *coded_samples = AV_RL32(buf);
+ nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch;
+ break;
+ case CODEC_ID_ADPCM_EA_MAXIS_XA:
+ nb_samples = ((buf_size - ch) / (2 * ch)) * 2 * ch;
+ break;
+ case CODEC_ID_ADPCM_EA_R1:
+ case CODEC_ID_ADPCM_EA_R2:
+ case CODEC_ID_ADPCM_EA_R3:
+ /* maximum number of samples */
+ /* has internal offsets and a per-frame switch to signal raw 16-bit */
+ has_coded_samples = 1;
+ if (buf_size < 4)
+ return 0;
+ switch (avctx->codec->id) {
+ case CODEC_ID_ADPCM_EA_R1:
+ header_size = 4 + 9 * ch;
+ *coded_samples = AV_RL32(buf);
+ break;
+ case CODEC_ID_ADPCM_EA_R2:
+ header_size = 4 + 5 * ch;
+ *coded_samples = AV_RL32(buf);
+ break;
+ case CODEC_ID_ADPCM_EA_R3:
+ header_size = 4 + 5 * ch;
+ *coded_samples = AV_RB32(buf);
+ break;
+ }
+ *coded_samples -= *coded_samples % 28;
+ nb_samples = (buf_size - header_size) * 2 / ch;
+ nb_samples -= nb_samples % 28;
+ break;
+ case CODEC_ID_ADPCM_IMA_DK3:
+ if (avctx->block_align > 0)
+ buf_size = FFMIN(buf_size, avctx->block_align);
+ nb_samples = ((buf_size - 16) * 8 / 3) / ch;
+ break;
+ case CODEC_ID_ADPCM_IMA_DK4:
+ nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch;
+ break;
+ case CODEC_ID_ADPCM_IMA_WAV:
+ if (avctx->block_align > 0)
+ buf_size = FFMIN(buf_size, avctx->block_align);
+ nb_samples = 1 + (buf_size - 4 * ch) / (4 * ch) * 8;
+ break;
+ case CODEC_ID_ADPCM_MS:
+ if (avctx->block_align > 0)
+ buf_size = FFMIN(buf_size, avctx->block_align);
+ nb_samples = 2 + (buf_size - 7 * ch) * 2 / ch;
+ break;
+ case CODEC_ID_ADPCM_SBPRO_2:
+ case CODEC_ID_ADPCM_SBPRO_3:
+ case CODEC_ID_ADPCM_SBPRO_4:
+ {
+ int samples_per_byte;
+ switch (avctx->codec->id) {
+ case CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break;
+ case CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break;
+ case CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break;
+ }
+ if (!s->status[0].step_index) {
+ nb_samples++;
+ buf_size -= ch;
+ }
+ nb_samples += buf_size * samples_per_byte / ch;
+ break;
+ }
+ case CODEC_ID_ADPCM_SWF:
+ {
+ int buf_bits = buf_size * 8 - 2;
+ int nbits = (buf[0] >> 6) + 2;
+ int block_hdr_size = 22 * ch;
+ int block_size = block_hdr_size + nbits * ch * 4095;
+ int nblocks = buf_bits / block_size;
+ int bits_left = buf_bits - nblocks * block_size;
+ nb_samples = nblocks * 4096;
+ if (bits_left >= block_hdr_size)
+ nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch);
+ break;
+ }
+ case CODEC_ID_ADPCM_THP:
+ has_coded_samples = 1;
+ if (buf_size < 8)
+ return 0;
+ *coded_samples = AV_RB32(&buf[4]);
+ *coded_samples -= *coded_samples % 14;
+ nb_samples = (buf_size - 80) / (8 * ch) * 14;
+ break;
+ case CODEC_ID_ADPCM_XA:
+ nb_samples = (buf_size / 128) * 224 / ch;
+ break;
+ }
+
+ /* validate coded sample count */
+ if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
+ return AVERROR_INVALIDDATA;
+
+ return nb_samples;
+}
/* DK3 ADPCM support macro */
#define DK3_GET_NEXT_NIBBLE() \
if (decode_top_nibble_next) \
{ \
- nibble = (last_byte >> 4) & 0x0F; \
+ nibble = last_byte >> 4; \
decode_top_nibble_next = 0; \
} \
else \
{ \
+ if (end_of_packet) \
+ break; \
last_byte = *src++; \
- if (src >= buf + buf_size) break; \
+ if (src >= buf + buf_size) \
+ end_of_packet = 1; \
nibble = last_byte & 0x0F; \
decode_top_nibble_next = 1; \
}
-static int adpcm_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- const uint8_t *buf, int buf_size)
+static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
{
- ADPCMContext *c = avctx->priv_data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ ADPCMDecodeContext *c = avctx->priv_data;
ADPCMChannelStatus *cs;
int n, m, channel, i;
- int block_predictor[2];
short *samples;
- short *samples_end;
const uint8_t *src;
int st; /* stereo */
-
- /* DK3 ADPCM accounting variables */
- unsigned char last_byte = 0;
- unsigned char nibble;
- int decode_top_nibble_next = 0;
- int diff_channel;
-
- /* EA ADPCM state variables */
- uint32_t samples_in_chunk;
- int32_t previous_left_sample, previous_right_sample;
- int32_t current_left_sample, current_right_sample;
- int32_t next_left_sample, next_right_sample;
- int32_t coeff1l, coeff2l, coeff1r, coeff2r;
- uint8_t shift_left, shift_right;
int count1, count2;
+ int nb_samples, coded_samples, ret;
- if (!buf_size)
- return 0;
+ nb_samples = get_nb_samples(avctx, buf, buf_size, &coded_samples);
+ if (nb_samples <= 0) {
+ av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
+ return AVERROR_INVALIDDATA;
+ }
- //should protect all 4bit ADPCM variants
- //8 is needed for CODEC_ID_ADPCM_IMA_WAV with 2 channels
- //
- if(*data_size/4 < buf_size + 8)
- return -1;
+ /* get output buffer */
+ c->frame.nb_samples = nb_samples;
+ if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ samples = (short *)c->frame.data[0];
+
+ /* use coded_samples when applicable */
+ /* it is always <= nb_samples, so the output buffer will be large enough */
+ if (coded_samples) {
+ if (coded_samples != nb_samples)
+ av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
+ c->frame.nb_samples = nb_samples = coded_samples;
+ }
- samples = data;
- samples_end= samples + *data_size/2;
- *data_size= 0;
src = buf;
st = avctx->channels == 2 ? 1 : 0;
switch(avctx->codec->id) {
case CODEC_ID_ADPCM_IMA_QT:
- n = (buf_size - 2);/* >> 2*avctx->channels;*/
- channel = c->channel;
- cs = &(c->status[channel]);
- /* (pppppp) (piiiiiii) */
-
- /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
- cs->predictor = (*src++) << 8;
- cs->predictor |= (*src & 0x80);
- cs->predictor &= 0xFF80;
-
- /* sign extension */
- if(cs->predictor & 0x8000)
- cs->predictor -= 0x10000;
-
- cs->predictor = av_clip_int16(cs->predictor);
-
- cs->step_index = (*src++) & 0x7F;
-
- if (cs->step_index > 88){
- av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", cs->step_index);
- cs->step_index = 88;
- }
-
- cs->step = step_table[cs->step_index];
+ /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
+ Channel data is interleaved per-chunk. */
+ for (channel = 0; channel < avctx->channels; channel++) {
+ int16_t predictor;
+ int step_index;
+ cs = &(c->status[channel]);
+ /* (pppppp) (piiiiiii) */
+
+ /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
+ predictor = AV_RB16(src);
+ step_index = predictor & 0x7F;
+ predictor &= 0xFF80;
+
+ src += 2;
+
+ if (cs->step_index == step_index) {
+ int diff = (int)predictor - cs->predictor;
+ if (diff < 0)
+ diff = - diff;
+ if (diff > 0x7f)
+ goto update;
+ } else {
+ update:
+ cs->step_index = step_index;
+ cs->predictor = predictor;
+ }
- if (st && channel)
- samples++;
+ if (cs->step_index > 88){
+ av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", cs->step_index);
+ cs->step_index = 88;
+ }
- for(m=32; n>0 && m>0; n--, m--) { /* in QuickTime, IMA is encoded by chuncks of 34 bytes (=64 samples) */
- *samples = adpcm_ima_expand_nibble(cs, src[0] & 0x0F, 3);
- samples += avctx->channels;
- *samples = adpcm_ima_expand_nibble(cs, (src[0] >> 4) & 0x0F, 3);
- samples += avctx->channels;
- src ++;
- }
+ samples = (short *)c->frame.data[0] + channel;
- if(st) { /* handle stereo interlacing */
- c->channel = (channel + 1) % 2; /* we get one packet for left, then one for right data */
- if(channel == 1) { /* wait for the other packet before outputing anything */
- return src - buf;
+ for (m = 0; m < 32; m++) {
+ *samples = adpcm_ima_qt_expand_nibble(cs, src[0] & 0x0F, 3);
+ samples += avctx->channels;
+ *samples = adpcm_ima_qt_expand_nibble(cs, src[0] >> 4 , 3);
+ samples += avctx->channels;
+ src ++;
}
}
break;
if (avctx->block_align != 0 && buf_size > avctx->block_align)
buf_size = avctx->block_align;
-// samples_per_block= (block_align-4*chanels)*8 / (bits_per_sample * chanels) + 1;
-
for(i=0; i<avctx->channels; i++){
cs = &(c->status[i]);
- cs->predictor = *samples++ = (int16_t)(src[0] + (src[1]<<8));
- src+=2;
+ cs->predictor = *samples++ = (int16_t)bytestream_get_le16(&src);
cs->step_index = *src++;
if (cs->step_index > 88){
if (*src++) av_log(avctx, AV_LOG_ERROR, "unused byte should be null but is %d!!\n", src[-1]); /* unused */
}
- while(src < buf + buf_size){
- for(m=0; m<4; m++){
- for(i=0; i<=st; i++)
- *samples++ = adpcm_ima_expand_nibble(&c->status[i], src[4*i] & 0x0F, 3);
- for(i=0; i<=st; i++)
- *samples++ = adpcm_ima_expand_nibble(&c->status[i], src[4*i] >> 4 , 3);
- src++;
+ for (n = (nb_samples - 1) / 8; n > 0; n--) {
+ for (i = 0; i < avctx->channels; i++) {
+ cs = &c->status[i];
+ for (m = 0; m < 4; m++) {
+ uint8_t v = *src++;
+ *samples = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
+ samples += avctx->channels;
+ *samples = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
+ samples += avctx->channels;
+ }
+ samples -= 8 * avctx->channels - 1;
}
- src += 4*st;
+ samples += 7 * avctx->channels;
}
break;
case CODEC_ID_ADPCM_4XM:
- cs = &(c->status[0]);
- c->status[0].predictor= (int16_t)(src[0] + (src[1]<<8)); src+=2;
- if(st){
- c->status[1].predictor= (int16_t)(src[0] + (src[1]<<8)); src+=2;
- }
- c->status[0].step_index= (int16_t)(src[0] + (src[1]<<8)); src+=2;
- if(st){
- c->status[1].step_index= (int16_t)(src[0] + (src[1]<<8)); src+=2;
- }
- if (cs->step_index < 0) cs->step_index = 0;
- if (cs->step_index > 88) cs->step_index = 88;
+ for (i = 0; i < avctx->channels; i++)
+ c->status[i].predictor= (int16_t)bytestream_get_le16(&src);
- m= (buf_size - (src - buf))>>st;
- for(i=0; i<m; i++) {
- *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[i] & 0x0F, 4);
- if (st)
- *samples++ = adpcm_ima_expand_nibble(&c->status[1], src[i+m] & 0x0F, 4);
- *samples++ = adpcm_ima_expand_nibble(&c->status[0], src[i] >> 4, 4);
- if (st)
- *samples++ = adpcm_ima_expand_nibble(&c->status[1], src[i+m] >> 4, 4);
+ for (i = 0; i < avctx->channels; i++) {
+ c->status[i].step_index= (int16_t)bytestream_get_le16(&src);
+ c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
}
- src += m<<st;
-
+ for (i = 0; i < avctx->channels; i++) {
+ samples = (short *)c->frame.data[0] + i;
+ cs = &c->status[i];
+ for (n = nb_samples >> 1; n > 0; n--, src++) {
+ uint8_t v = *src;
+ *samples = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
+ samples += avctx->channels;
+ *samples = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
+ samples += avctx->channels;
+ }
+ }
break;
case CODEC_ID_ADPCM_MS:
+ {
+ int block_predictor;
+
if (avctx->block_align != 0 && buf_size > avctx->block_align)
buf_size = avctx->block_align;
- n = buf_size - 7 * avctx->channels;
- if (n < 0)
- return -1;
- block_predictor[0] = av_clip(*src++, 0, 7);
- block_predictor[1] = 0;
- if (st)
- block_predictor[1] = av_clip(*src++, 0, 7);
- c->status[0].idelta = (int16_t)((*src & 0xFF) | ((src[1] << 8) & 0xFF00));
- src+=2;
+
+ block_predictor = av_clip(*src++, 0, 6);
+ c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
+ c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
+ if (st) {
+ block_predictor = av_clip(*src++, 0, 6);
+ c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
+ c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
+ }
+ c->status[0].idelta = (int16_t)bytestream_get_le16(&src);
if (st){
- c->status[1].idelta = (int16_t)((*src & 0xFF) | ((src[1] << 8) & 0xFF00));
- src+=2;
+ c->status[1].idelta = (int16_t)bytestream_get_le16(&src);
}
- c->status[0].coeff1 = AdaptCoeff1[block_predictor[0]];
- c->status[0].coeff2 = AdaptCoeff2[block_predictor[0]];
- c->status[1].coeff1 = AdaptCoeff1[block_predictor[1]];
- c->status[1].coeff2 = AdaptCoeff2[block_predictor[1]];
-
- c->status[0].sample1 = ((*src & 0xFF) | ((src[1] << 8) & 0xFF00));
- src+=2;
- if (st) c->status[1].sample1 = ((*src & 0xFF) | ((src[1] << 8) & 0xFF00));
- if (st) src+=2;
- c->status[0].sample2 = ((*src & 0xFF) | ((src[1] << 8) & 0xFF00));
- src+=2;
- if (st) c->status[1].sample2 = ((*src & 0xFF) | ((src[1] << 8) & 0xFF00));
- if (st) src+=2;
- *samples++ = c->status[0].sample1;
- if (st) *samples++ = c->status[1].sample1;
+ c->status[0].sample1 = bytestream_get_le16(&src);
+ if (st) c->status[1].sample1 = bytestream_get_le16(&src);
+ c->status[0].sample2 = bytestream_get_le16(&src);
+ if (st) c->status[1].sample2 = bytestream_get_le16(&src);
+
*samples++ = c->status[0].sample2;
if (st) *samples++ = c->status[1].sample2;
- for(;n>0;n--) {
- *samples++ = adpcm_ms_expand_nibble(&c->status[0], (src[0] >> 4) & 0x0F);
+ *samples++ = c->status[0].sample1;
+ if (st) *samples++ = c->status[1].sample1;
+ for(n = (nb_samples - 2) >> (1 - st); n > 0; n--, src++) {
+ *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], src[0] >> 4 );
*samples++ = adpcm_ms_expand_nibble(&c->status[st], src[0] & 0x0F);
- src ++;
}
break;
+ }
case CODEC_ID_ADPCM_IMA_DK4:
if (avctx->block_align != 0 && buf_size > avctx->block_align)
buf_size = avctx->block_align;
- c->status[0].predictor = (int16_t)(src[0] | (src[1] << 8));
- c->status[0].step_index = src[2];
- src += 4;
- *samples++ = c->status[0].predictor;
- if (st) {
- c->status[1].predictor = (int16_t)(src[0] | (src[1] << 8));
- c->status[1].step_index = src[2];
- src += 4;
- *samples++ = c->status[1].predictor;
- }
- while (src < buf + buf_size) {
-
- /* take care of the top nibble (always left or mono channel) */
- *samples++ = adpcm_ima_expand_nibble(&c->status[0],
- (src[0] >> 4) & 0x0F, 3);
-
- /* take care of the bottom nibble, which is right sample for
- * stereo, or another mono sample */
- if (st)
- *samples++ = adpcm_ima_expand_nibble(&c->status[1],
- src[0] & 0x0F, 3);
- else
- *samples++ = adpcm_ima_expand_nibble(&c->status[0],
- src[0] & 0x0F, 3);
-
+ for (channel = 0; channel < avctx->channels; channel++) {
+ cs = &c->status[channel];
+ cs->predictor = (int16_t)bytestream_get_le16(&src);
+ cs->step_index = *src++;
src++;
+ *samples++ = cs->predictor;
+ }
+ for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
+ uint8_t v = *src;
+ *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
+ *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
}
break;
case CODEC_ID_ADPCM_IMA_DK3:
+ {
+ unsigned char last_byte = 0;
+ unsigned char nibble;
+ int decode_top_nibble_next = 0;
+ int end_of_packet = 0;
+ int diff_channel;
+
if (avctx->block_align != 0 && buf_size > avctx->block_align)
buf_size = avctx->block_align;
- if(buf_size + 16 > (samples_end - samples)*3/8)
- return -1;
-
- c->status[0].predictor = (int16_t)(src[10] | (src[11] << 8));
- c->status[1].predictor = (int16_t)(src[12] | (src[13] << 8));
+ c->status[0].predictor = (int16_t)AV_RL16(src + 10);
+ c->status[1].predictor = (int16_t)AV_RL16(src + 12);
c->status[0].step_index = src[14];
c->status[1].step_index = src[15];
/* sign extend the predictors */
*samples++ = c->status[0].predictor - c->status[1].predictor;
}
break;
- case CODEC_ID_ADPCM_IMA_WS:
- /* no per-block initialization; just start decoding the data */
- while (src < buf + buf_size) {
+ }
+ case CODEC_ID_ADPCM_IMA_ISS:
+ for (channel = 0; channel < avctx->channels; channel++) {
+ cs = &c->status[channel];
+ cs->predictor = (int16_t)bytestream_get_le16(&src);
+ cs->step_index = *src++;
+ src++;
+ }
+ for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
+ uint8_t v1, v2;
+ uint8_t v = *src;
+ /* nibbles are swapped for mono */
if (st) {
- *samples++ = adpcm_ima_expand_nibble(&c->status[0],
- (src[0] >> 4) & 0x0F, 3);
- *samples++ = adpcm_ima_expand_nibble(&c->status[1],
- src[0] & 0x0F, 3);
+ v1 = v >> 4;
+ v2 = v & 0x0F;
} else {
- *samples++ = adpcm_ima_expand_nibble(&c->status[0],
- (src[0] >> 4) & 0x0F, 3);
- *samples++ = adpcm_ima_expand_nibble(&c->status[0],
- src[0] & 0x0F, 3);
+ v2 = v >> 4;
+ v1 = v & 0x0F;
}
-
- src++;
+ *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
+ *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
+ }
+ break;
+ case CODEC_ID_ADPCM_IMA_WS:
+ while (src < buf + buf_size) {
+ uint8_t v = *src++;
+ *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
+ *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
}
break;
case CODEC_ID_ADPCM_XA:
}
break;
case CODEC_ID_ADPCM_IMA_EA_EACS:
- samples_in_chunk = bytestream_get_le32(&src) >> (1-st);
-
- if (samples_in_chunk > buf_size-4-(8<<st)) {
- src += buf_size - 4;
- break;
- }
+ src += 4; // skip sample count (already read)
for (i=0; i<=st; i++)
c->status[i].step_index = bytestream_get_le32(&src);
for (i=0; i<=st; i++)
c->status[i].predictor = bytestream_get_le32(&src);
- for (; samples_in_chunk; samples_in_chunk--, src++) {
+ for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
*samples++ = adpcm_ima_expand_nibble(&c->status[0], *src>>4, 3);
*samples++ = adpcm_ima_expand_nibble(&c->status[st], *src&0x0F, 3);
}
break;
case CODEC_ID_ADPCM_IMA_EA_SEAD:
- for (; src < buf+buf_size; src++) {
+ for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
*samples++ = adpcm_ima_expand_nibble(&c->status[0], src[0] >> 4, 6);
*samples++ = adpcm_ima_expand_nibble(&c->status[st],src[0]&0x0F, 6);
}
break;
case CODEC_ID_ADPCM_EA:
- samples_in_chunk = AV_RL32(src);
- if (samples_in_chunk >= ((buf_size - 12) * 2)) {
- src += buf_size;
- break;
- }
- src += 4;
- current_left_sample = (int16_t)AV_RL16(src);
- src += 2;
- previous_left_sample = (int16_t)AV_RL16(src);
- src += 2;
- current_right_sample = (int16_t)AV_RL16(src);
- src += 2;
- previous_right_sample = (int16_t)AV_RL16(src);
- src += 2;
-
- for (count1 = 0; count1 < samples_in_chunk/28;count1++) {
- coeff1l = ea_adpcm_table[(*src >> 4) & 0x0F];
- coeff2l = ea_adpcm_table[((*src >> 4) & 0x0F) + 4];
+ {
+ int32_t previous_left_sample, previous_right_sample;
+ int32_t current_left_sample, current_right_sample;
+ int32_t next_left_sample, next_right_sample;
+ int32_t coeff1l, coeff2l, coeff1r, coeff2r;
+ uint8_t shift_left, shift_right;
+
+ /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
+ each coding 28 stereo samples. */
+
+ src += 4; // skip sample count (already read)
+
+ current_left_sample = (int16_t)bytestream_get_le16(&src);
+ previous_left_sample = (int16_t)bytestream_get_le16(&src);
+ current_right_sample = (int16_t)bytestream_get_le16(&src);
+ previous_right_sample = (int16_t)bytestream_get_le16(&src);
+
+ for (count1 = 0; count1 < nb_samples / 28; count1++) {
+ coeff1l = ea_adpcm_table[ *src >> 4 ];
+ coeff2l = ea_adpcm_table[(*src >> 4 ) + 4];
coeff1r = ea_adpcm_table[*src & 0x0F];
coeff2r = ea_adpcm_table[(*src & 0x0F) + 4];
src++;
- shift_left = ((*src >> 4) & 0x0F) + 8;
- shift_right = (*src & 0x0F) + 8;
+ shift_left = 20 - (*src >> 4);
+ shift_right = 20 - (*src & 0x0F);
src++;
for (count2 = 0; count2 < 28; count2++) {
- next_left_sample = (((*src & 0xF0) << 24) >> shift_left);
- next_right_sample = (((*src & 0x0F) << 28) >> shift_right);
+ next_left_sample = sign_extend(*src >> 4, 4) << shift_left;
+ next_right_sample = sign_extend(*src, 4) << shift_right;
src++;
next_left_sample = (next_left_sample +
*samples++ = (unsigned short)current_right_sample;
}
}
+
+ if (src - buf == buf_size - 2)
+ src += 2; // Skip terminating 0x0000
+
+ break;
+ }
+ case CODEC_ID_ADPCM_EA_MAXIS_XA:
+ {
+ int coeff[2][2], shift[2];
+
+ for(channel = 0; channel < avctx->channels; channel++) {
+ for (i=0; i<2; i++)
+ coeff[channel][i] = ea_adpcm_table[(*src >> 4) + 4*i];
+ shift[channel] = 20 - (*src & 0x0F);
+ src++;
+ }
+ for (count1 = 0; count1 < nb_samples / 2; count1++) {
+ for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
+ for(channel = 0; channel < avctx->channels; channel++) {
+ int32_t sample = sign_extend(src[channel] >> i, 4) << shift[channel];
+ sample = (sample +
+ c->status[channel].sample1 * coeff[channel][0] +
+ c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
+ c->status[channel].sample2 = c->status[channel].sample1;
+ c->status[channel].sample1 = av_clip_int16(sample);
+ *samples++ = c->status[channel].sample1;
+ }
+ }
+ src+=avctx->channels;
+ }
+ /* consume whole packet */
+ src = buf + buf_size;
break;
+ }
case CODEC_ID_ADPCM_EA_R1:
case CODEC_ID_ADPCM_EA_R2:
case CODEC_ID_ADPCM_EA_R3: {
unsigned int channel;
uint16_t *samplesC;
const uint8_t *srcC;
+ const uint8_t *src_end = buf + buf_size;
+ int count = 0;
- samples_in_chunk = (big_endian ? bytestream_get_be32(&src)
- : bytestream_get_le32(&src)) / 28;
- if (samples_in_chunk > UINT32_MAX/(28*avctx->channels) ||
- 28*samples_in_chunk*avctx->channels > samples_end-samples) {
- src += buf_size - 4;
- break;
- }
+ src += 4; // skip sample count (already read)
for (channel=0; channel<avctx->channels; channel++) {
- srcC = src + (big_endian ? bytestream_get_be32(&src)
- : bytestream_get_le32(&src))
- + (avctx->channels-channel-1) * 4;
+ int32_t offset = (big_endian ? bytestream_get_be32(&src)
+ : bytestream_get_le32(&src))
+ + (avctx->channels-channel-1) * 4;
+
+ if ((offset < 0) || (offset >= src_end - src - 4)) break;
+ srcC = src + offset;
samplesC = samples + channel;
if (avctx->codec->id == CODEC_ID_ADPCM_EA_R1) {
previous_sample = c->status[channel].prev_sample;
}
- for (count1=0; count1<samples_in_chunk; count1++) {
+ for (count1 = 0; count1 < nb_samples / 28; count1++) {
if (*srcC == 0xEE) { /* only seen in R2 and R3 */
srcC++;
+ if (srcC > src_end - 30*2) break;
current_sample = (int16_t)bytestream_get_be16(&srcC);
previous_sample = (int16_t)bytestream_get_be16(&srcC);
samplesC += avctx->channels;
}
} else {
- coeff1 = ea_adpcm_table[ (*srcC>>4) & 0x0F ];
- coeff2 = ea_adpcm_table[((*srcC>>4) & 0x0F) + 4];
- shift = (*srcC++ & 0x0F) + 8;
+ coeff1 = ea_adpcm_table[ *srcC>>4 ];
+ coeff2 = ea_adpcm_table[(*srcC>>4) + 4];
+ shift = 20 - (*srcC++ & 0x0F);
+ if (srcC > src_end - 14) break;
for (count2=0; count2<28; count2++) {
if (count2 & 1)
- next_sample = ((*srcC++ & 0x0F) << 28) >> shift;
+ next_sample = sign_extend(*srcC++, 4) << shift;
else
- next_sample = ((*srcC & 0xF0) << 24) >> shift;
+ next_sample = sign_extend(*srcC >> 4, 4) << shift;
next_sample += (current_sample * coeff1) +
(previous_sample * coeff2);
}
}
}
+ if (!count) {
+ count = count1;
+ } else if (count != count1) {
+ av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
+ count = FFMAX(count, count1);
+ }
if (avctx->codec->id != CODEC_ID_ADPCM_EA_R1) {
c->status[channel].predictor = current_sample;
}
}
- src = src + buf_size - (4 + 4*avctx->channels);
- samples += 28 * samples_in_chunk * avctx->channels;
+ c->frame.nb_samples = count * 28;
+ src = src_end;
break;
}
case CODEC_ID_ADPCM_EA_XAS:
- if (samples_end-samples < 32*4*avctx->channels
- || buf_size < (4+15)*4*avctx->channels) {
- src += buf_size;
- break;
- }
for (channel=0; channel<avctx->channels; channel++) {
int coeff[2][4], shift[4];
short *s2, *s = &samples[channel];
for (n=0; n<4; n++, s+=32*avctx->channels) {
for (i=0; i<2; i++)
coeff[i][n] = ea_adpcm_table[(src[0]&0x0F)+4*i];
- shift[n] = (src[2]&0x0F) + 8;
+ shift[n] = 20 - (src[2] & 0x0F);
for (s2=s, i=0; i<2; i++, src+=2, s2+=avctx->channels)
s2[0] = (src[0]&0xF0) + (src[1]<<8);
}
s = &samples[m*avctx->channels + channel];
for (n=0; n<4; n++, src++, s+=32*avctx->channels) {
for (s2=s, i=0; i<8; i+=4, s2+=avctx->channels) {
- int level = ((*src & (0xF0>>i)) << (24+i)) >> shift[n];
+ int level = sign_extend(*src >> (4 - i), 4) << shift[n];
int pred = s2[-1*avctx->channels] * coeff[0][n]
+ s2[-2*avctx->channels] * coeff[1][n];
s2[0] = av_clip_int16((level + pred + 0x80) >> 8);
}
}
}
- samples += 32*4*avctx->channels;
break;
case CODEC_ID_ADPCM_IMA_AMV:
case CODEC_ID_ADPCM_IMA_SMJPEG:
if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV)
src+=4;
- while (src < buf + buf_size) {
+ for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
char hi, lo;
lo = *src & 0x0F;
- hi = (*src >> 4) & 0x0F;
+ hi = *src >> 4;
if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV)
FFSWAP(char, hi, lo);
lo, 3);
*samples++ = adpcm_ima_expand_nibble(&c->status[0],
hi, 3);
- src++;
}
break;
case CODEC_ID_ADPCM_CT:
- while (src < buf + buf_size) {
- if (st) {
- *samples++ = adpcm_ct_expand_nibble(&c->status[0],
- (src[0] >> 4) & 0x0F);
- *samples++ = adpcm_ct_expand_nibble(&c->status[1],
- src[0] & 0x0F);
- } else {
- *samples++ = adpcm_ct_expand_nibble(&c->status[0],
- (src[0] >> 4) & 0x0F);
- *samples++ = adpcm_ct_expand_nibble(&c->status[0],
- src[0] & 0x0F);
- }
- src++;
+ for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
+ uint8_t v = *src;
+ *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
+ *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
}
break;
case CODEC_ID_ADPCM_SBPRO_4:
if (st)
*samples++ = 128 * (*src++ - 0x80);
c->status[0].step_index = 1;
+ nb_samples--;
}
if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_4) {
- while (src < buf + buf_size) {
+ for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
- (src[0] >> 4) & 0x0F, 4, 0);
+ src[0] >> 4, 4, 0);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
src[0] & 0x0F, 4, 0);
- src++;
}
} else if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_3) {
- while (src < buf + buf_size && samples + 2 < samples_end) {
+ for (n = nb_samples / 3; n > 0; n--, src++) {
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
- (src[0] >> 5) & 0x07, 3, 0);
+ src[0] >> 5 , 3, 0);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
(src[0] >> 2) & 0x07, 3, 0);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
src[0] & 0x03, 2, 0);
- src++;
}
} else {
- while (src < buf + buf_size && samples + 3 < samples_end) {
+ for (n = nb_samples >> (2 - st); n > 0; n--, src++) {
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
- (src[0] >> 6) & 0x03, 2, 2);
+ src[0] >> 6 , 2, 2);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
(src[0] >> 4) & 0x03, 2, 2);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
(src[0] >> 2) & 0x03, 2, 2);
*samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
src[0] & 0x03, 2, 2);
- src++;
}
}
break;
for (i = 0; i < avctx->channels; i++) {
// similar to IMA adpcm
int delta = get_bits(&gb, nb_bits);
- int step = step_table[c->status[i].step_index];
+ int step = ff_adpcm_step_table[c->status[i].step_index];
long vpdiff = 0; // vpdiff = (delta+0.5)*step/4
int k = k0;
c->status[i].predictor = av_clip_int16(c->status[i].predictor);
*samples++ = c->status[i].predictor;
- if (samples >= samples_end) {
- av_log(avctx, AV_LOG_ERROR, "allocated output buffer is too small\n");
- return -1;
- }
}
}
}
break;
}
case CODEC_ID_ADPCM_YAMAHA:
- while (src < buf + buf_size) {
- if (st) {
- *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
- src[0] & 0x0F);
- *samples++ = adpcm_yamaha_expand_nibble(&c->status[1],
- (src[0] >> 4) & 0x0F);
- } else {
- *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
- src[0] & 0x0F);
- *samples++ = adpcm_yamaha_expand_nibble(&c->status[0],
- (src[0] >> 4) & 0x0F);
- }
- src++;
+ for (n = nb_samples >> (1 - st); n > 0; n--, src++) {
+ uint8_t v = *src;
+ *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
+ *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
}
break;
case CODEC_ID_ADPCM_THP:
{
int table[2][16];
- unsigned int samplecnt;
int prev[2][2];
int ch;
- if (buf_size < 80) {
- av_log(avctx, AV_LOG_ERROR, "frame too small\n");
- return -1;
- }
-
- src+=4;
- samplecnt = bytestream_get_be32(&src);
+ src += 4; // skip channel size
+ src += 4; // skip number of samples (already read)
for (i = 0; i < 32; i++)
table[0][i] = (int16_t)bytestream_get_be16(&src);
for (i = 0; i < 4; i++)
prev[0][i] = (int16_t)bytestream_get_be16(&src);
- if (samplecnt >= (samples_end - samples) / (st + 1)) {
- av_log(avctx, AV_LOG_ERROR, "allocated output buffer is too small\n");
- return -1;
- }
-
for (ch = 0; ch <= st; ch++) {
- samples = (unsigned short *) data + ch;
+ samples = (short *)c->frame.data[0] + ch;
/* Read in every sample for this channel. */
- for (i = 0; i < samplecnt / 14; i++) {
+ for (i = 0; i < nb_samples / 14; i++) {
int index = (*src >> 4) & 7;
- unsigned int exp = 28 - (*src++ & 15);
+ unsigned int exp = *src++ & 15;
int factor1 = table[ch][index * 2];
int factor2 = table[ch][index * 2 + 1];
/* Decode 14 samples. */
for (n = 0; n < 14; n++) {
int32_t sampledat;
- if(n&1) sampledat= *src++ <<28;
- else sampledat= (*src&0xF0)<<24;
+ if(n&1) sampledat = sign_extend(*src++, 4);
+ else sampledat = sign_extend(*src >> 4, 4);
sampledat = ((prev[ch][0]*factor1
- + prev[ch][1]*factor2) >> 11) + (sampledat>>exp);
+ + prev[ch][1]*factor2) >> 11) + (sampledat << exp);
*samples = av_clip_int16(sampledat);
prev[ch][1] = prev[ch][0];
prev[ch][0] = *samples++;
}
}
}
-
- /* In the previous loop, in case stereo is used, samples is
- increased exactly one time too often. */
- samples -= st;
break;
}
default:
return -1;
}
- *data_size = (uint8_t *)samples - (uint8_t *)data;
+
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = c->frame;
+
return src - buf;
}
+#define ADPCM_DECODER(id_, name_, long_name_) \
+AVCodec ff_ ## name_ ## _decoder = { \
+ .name = #name_, \
+ .type = AVMEDIA_TYPE_AUDIO, \
+ .id = id_, \
+ .priv_data_size = sizeof(ADPCMDecodeContext), \
+ .init = adpcm_decode_init, \
+ .decode = adpcm_decode_frame, \
+ .capabilities = CODEC_CAP_DR1, \
+ .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
+}
-#ifdef CONFIG_ENCODERS
-#define ADPCM_ENCODER(id,name) \
-AVCodec name ## _encoder = { \
- #name, \
- CODEC_TYPE_AUDIO, \
- id, \
- sizeof(ADPCMContext), \
- adpcm_encode_init, \
- adpcm_encode_frame, \
- adpcm_encode_close, \
- NULL, \
-};
-#else
-#define ADPCM_ENCODER(id,name)
-#endif
-
-#ifdef CONFIG_DECODERS
-#define ADPCM_DECODER(id,name) \
-AVCodec name ## _decoder = { \
- #name, \
- CODEC_TYPE_AUDIO, \
- id, \
- sizeof(ADPCMContext), \
- adpcm_decode_init, \
- NULL, \
- NULL, \
- adpcm_decode_frame, \
-};
-#else
-#define ADPCM_DECODER(id,name)
-#endif
-
-#define ADPCM_CODEC(id, name) \
-ADPCM_ENCODER(id,name) ADPCM_DECODER(id,name)
-
-ADPCM_DECODER(CODEC_ID_ADPCM_4XM, adpcm_4xm);
-ADPCM_DECODER(CODEC_ID_ADPCM_CT, adpcm_ct);
-ADPCM_DECODER(CODEC_ID_ADPCM_EA, adpcm_ea);
-ADPCM_DECODER(CODEC_ID_ADPCM_EA_R1, adpcm_ea_r1);
-ADPCM_DECODER(CODEC_ID_ADPCM_EA_R2, adpcm_ea_r2);
-ADPCM_DECODER(CODEC_ID_ADPCM_EA_R3, adpcm_ea_r3);
-ADPCM_DECODER(CODEC_ID_ADPCM_EA_XAS, adpcm_ea_xas);
-ADPCM_DECODER(CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv);
-ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
-ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
-ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs);
-ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead);
-ADPCM_CODEC (CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
-ADPCM_DECODER(CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg);
-ADPCM_CODEC (CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
-ADPCM_DECODER(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
-ADPCM_CODEC (CODEC_ID_ADPCM_MS, adpcm_ms);
-ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
-ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
-ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
-ADPCM_CODEC (CODEC_ID_ADPCM_SWF, adpcm_swf);
-ADPCM_DECODER(CODEC_ID_ADPCM_THP, adpcm_thp);
-ADPCM_DECODER(CODEC_ID_ADPCM_XA, adpcm_xa);
-ADPCM_CODEC (CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
+/* Note: Do not forget to add new entries to the Makefile as well. */
+ADPCM_DECODER(CODEC_ID_ADPCM_4XM, adpcm_4xm, "ADPCM 4X Movie");
+ADPCM_DECODER(CODEC_ID_ADPCM_CT, adpcm_ct, "ADPCM Creative Technology");
+ADPCM_DECODER(CODEC_ID_ADPCM_EA, adpcm_ea, "ADPCM Electronic Arts");
+ADPCM_DECODER(CODEC_ID_ADPCM_EA_MAXIS_XA, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA");
+ADPCM_DECODER(CODEC_ID_ADPCM_EA_R1, adpcm_ea_r1, "ADPCM Electronic Arts R1");
+ADPCM_DECODER(CODEC_ID_ADPCM_EA_R2, adpcm_ea_r2, "ADPCM Electronic Arts R2");
+ADPCM_DECODER(CODEC_ID_ADPCM_EA_R3, adpcm_ea_r3, "ADPCM Electronic Arts R3");
+ADPCM_DECODER(CODEC_ID_ADPCM_EA_XAS, adpcm_ea_xas, "ADPCM Electronic Arts XAS");
+ADPCM_DECODER(CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv, "ADPCM IMA AMV");
+ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3, "ADPCM IMA Duck DK3");
+ADPCM_DECODER(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4, "ADPCM IMA Duck DK4");
+ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS");
+ADPCM_DECODER(CODEC_ID_ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD");
+ADPCM_DECODER(CODEC_ID_ADPCM_IMA_ISS, adpcm_ima_iss, "ADPCM IMA Funcom ISS");
+ADPCM_DECODER(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt, "ADPCM IMA QuickTime");
+ADPCM_DECODER(CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG");
+ADPCM_DECODER(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav, "ADPCM IMA WAV");
+ADPCM_DECODER(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws, "ADPCM IMA Westwood");
+ADPCM_DECODER(CODEC_ID_ADPCM_MS, adpcm_ms, "ADPCM Microsoft");
+ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit");
+ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit");
+ADPCM_DECODER(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit");
+ADPCM_DECODER(CODEC_ID_ADPCM_SWF, adpcm_swf, "ADPCM Shockwave Flash");
+ADPCM_DECODER(CODEC_ID_ADPCM_THP, adpcm_thp, "ADPCM Nintendo Gamecube THP");
+ADPCM_DECODER(CODEC_ID_ADPCM_XA, adpcm_xa, "ADPCM CDROM XA");
+ADPCM_DECODER(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha, "ADPCM Yamaha");
projects / ffmpeg / blobdiff