mirror of https://git.ffmpeg.org/ffmpeg.git
1555 lines
55 KiB
C
1555 lines
55 KiB
C
/*
|
|
* ADPCM codecs
|
|
* Copyright (c) 2001-2003 The ffmpeg Project
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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,
|
|
* 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
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#include "avcodec.h"
|
|
#include "bitstream.h"
|
|
#include "bytestream.h"
|
|
|
|
/**
|
|
* @file adpcm.c
|
|
* ADPCM codecs.
|
|
* First version by Francois Revol (revol@free.fr)
|
|
* Fringe ADPCM codecs (e.g., DK3, DK4, Westwood)
|
|
* by Mike Melanson (melanson@pcisys.net)
|
|
* CD-ROM XA ADPCM codec by BERO
|
|
* EA ADPCM decoder by Robin Kay (komadori@myrealbox.com)
|
|
* EA ADPCM R1/R2/R3 decoder by Peter Ross (pross@xvid.org)
|
|
* 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
|
|
*
|
|
* CD-ROM XA:
|
|
* http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html
|
|
* vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html
|
|
* 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 }
|
|
};
|
|
|
|
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
|
|
};
|
|
|
|
// padded to zero where table size is less then 16
|
|
static const int swf_index_tables[4][16] = {
|
|
/*2*/ { -1, 2 },
|
|
/*3*/ { -1, -1, 2, 4 },
|
|
/*4*/ { -1, -1, -1, -1, 2, 4, 6, 8 },
|
|
/*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 */
|
|
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_QT:
|
|
av_log(avctx, AV_LOG_ERROR, "ADPCM: codec adpcm_ima_qt unsupported for encoding !\n");
|
|
avctx->frame_size = 64; /* XXX: can multiple of avctx->channels * 64 (left and right blocks are interleaved) */
|
|
return -1;
|
|
break;
|
|
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_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_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_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_QT: /* XXX: can't test until we get .mov writer */
|
|
break;
|
|
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[1];
|
|
/* 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_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
|
|
|
|
static int adpcm_decode_init(AVCodecContext * avctx)
|
|
{
|
|
ADPCMContext *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:
|
|
max_channels = 6;
|
|
break;
|
|
}
|
|
if(avctx->channels > max_channels){
|
|
return -1;
|
|
}
|
|
|
|
switch(avctx->codec->id) {
|
|
case CODEC_ID_ADPCM_CT:
|
|
c->status[0].step = c->status[1].step = 511;
|
|
break;
|
|
case CODEC_ID_ADPCM_IMA_WS:
|
|
if (avctx->extradata && avctx->extradata_size == 2 * 4) {
|
|
c->status[0].predictor = AV_RL32(avctx->extradata);
|
|
c->status[1].predictor = AV_RL32(avctx->extradata + 4);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline short adpcm_ima_expand_nibble(ADPCMChannelStatus *c, char nibble, int shift)
|
|
{
|
|
int step_index;
|
|
int predictor;
|
|
int sign, delta, diff, step;
|
|
|
|
step = step_table[c->step_index];
|
|
step_index = c->step_index + index_table[(unsigned)nibble];
|
|
if (step_index < 0) step_index = 0;
|
|
else if (step_index > 88) step_index = 88;
|
|
|
|
sign = nibble & 8;
|
|
delta = nibble & 7;
|
|
/* perform direct multiplication instead of series of jumps proposed by
|
|
* the reference ADPCM implementation since modern CPUs can do the mults
|
|
* quickly enough */
|
|
diff = ((2 * delta + 1) * step) >> shift;
|
|
predictor = c->predictor;
|
|
if (sign) predictor -= diff;
|
|
else predictor += diff;
|
|
|
|
c->predictor = av_clip_int16(predictor);
|
|
c->step_index = step_index;
|
|
|
|
return (short)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 += (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 c->sample1;
|
|
}
|
|
|
|
static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
|
|
{
|
|
int sign, delta, diff;
|
|
int new_step;
|
|
|
|
sign = nibble & 8;
|
|
delta = nibble & 7;
|
|
/* perform direct multiplication instead of series of jumps proposed by
|
|
* the reference ADPCM implementation since modern CPUs can do the mults
|
|
* quickly enough */
|
|
diff = ((2 * delta + 1) * c->step) >> 3;
|
|
/* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
|
|
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;
|
|
c->step = av_clip(new_step, 511, 32767);
|
|
|
|
return (short)c->predictor;
|
|
}
|
|
|
|
static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble, int size, int shift)
|
|
{
|
|
int sign, delta, diff;
|
|
|
|
sign = nibble & (1<<(size-1));
|
|
delta = nibble & ((1<<(size-1))-1);
|
|
diff = delta << (7 + c->step + shift);
|
|
|
|
/* clamp result */
|
|
c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
|
|
|
|
/* calculate new step */
|
|
if (delta >= (2*size - 3) && c->step < 3)
|
|
c->step++;
|
|
else if (delta == 0 && c->step > 0)
|
|
c->step--;
|
|
|
|
return (short) c->predictor;
|
|
}
|
|
|
|
static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned char nibble)
|
|
{
|
|
if(!c->step) {
|
|
c->predictor = 0;
|
|
c->step = 127;
|
|
}
|
|
|
|
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 c->predictor;
|
|
}
|
|
|
|
static void xa_decode(short *out, const unsigned char *in,
|
|
ADPCMChannelStatus *left, ADPCMChannelStatus *right, int inc)
|
|
{
|
|
int i, j;
|
|
int shift,filter,f0,f1;
|
|
int s_1,s_2;
|
|
int d,s,t;
|
|
|
|
for(i=0;i<4;i++) {
|
|
|
|
shift = 12 - (in[4+i*2] & 15);
|
|
filter = in[4+i*2] >> 4;
|
|
f0 = xa_adpcm_table[filter][0];
|
|
f1 = xa_adpcm_table[filter][1];
|
|
|
|
s_1 = left->sample1;
|
|
s_2 = left->sample2;
|
|
|
|
for(j=0;j<28;j++) {
|
|
d = in[16+i+j*4];
|
|
|
|
t = (signed char)(d<<4)>>4;
|
|
s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
|
|
s_2 = s_1;
|
|
s_1 = av_clip_int16(s);
|
|
*out = s_1;
|
|
out += inc;
|
|
}
|
|
|
|
if (inc==2) { /* stereo */
|
|
left->sample1 = s_1;
|
|
left->sample2 = s_2;
|
|
s_1 = right->sample1;
|
|
s_2 = right->sample2;
|
|
out = out + 1 - 28*2;
|
|
}
|
|
|
|
shift = 12 - (in[5+i*2] & 15);
|
|
filter = in[5+i*2] >> 4;
|
|
|
|
f0 = xa_adpcm_table[filter][0];
|
|
f1 = xa_adpcm_table[filter][1];
|
|
|
|
for(j=0;j<28;j++) {
|
|
d = in[16+i+j*4];
|
|
|
|
t = (signed char)d >> 4;
|
|
s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6);
|
|
s_2 = s_1;
|
|
s_1 = av_clip_int16(s);
|
|
*out = s_1;
|
|
out += inc;
|
|
}
|
|
|
|
if (inc==2) { /* stereo */
|
|
right->sample1 = s_1;
|
|
right->sample2 = s_2;
|
|
out -= 1;
|
|
} else {
|
|
left->sample1 = s_1;
|
|
left->sample2 = s_2;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* DK3 ADPCM support macro */
|
|
#define DK3_GET_NEXT_NIBBLE() \
|
|
if (decode_top_nibble_next) \
|
|
{ \
|
|
nibble = (last_byte >> 4) & 0x0F; \
|
|
decode_top_nibble_next = 0; \
|
|
} \
|
|
else \
|
|
{ \
|
|
last_byte = *src++; \
|
|
if (src >= buf + buf_size) break; \
|
|
nibble = last_byte & 0x0F; \
|
|
decode_top_nibble_next = 1; \
|
|
}
|
|
|
|
static int adpcm_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
uint8_t *buf, int buf_size)
|
|
{
|
|
ADPCMContext *c = avctx->priv_data;
|
|
ADPCMChannelStatus *cs;
|
|
int n, m, channel, i;
|
|
int block_predictor[2];
|
|
short *samples;
|
|
short *samples_end;
|
|
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;
|
|
|
|
if (!buf_size)
|
|
return 0;
|
|
|
|
//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;
|
|
|
|
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];
|
|
|
|
if (st && channel)
|
|
samples++;
|
|
|
|
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 ++;
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
break;
|
|
case CODEC_ID_ADPCM_IMA_WAV:
|
|
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 = (int16_t)(src[0] + (src[1]<<8));
|
|
src+=2;
|
|
|
|
// XXX: is this correct ??: *samples++ = cs->predictor;
|
|
|
|
cs->step_index = *src++;
|
|
if (cs->step_index > 88){
|
|
av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", cs->step_index);
|
|
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++;
|
|
}
|
|
src += 4*st;
|
|
}
|
|
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;
|
|
|
|
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);
|
|
}
|
|
|
|
src += m<<st;
|
|
|
|
break;
|
|
case CODEC_ID_ADPCM_MS:
|
|
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;
|
|
if (st){
|
|
c->status[1].idelta = (int16_t)((*src & 0xFF) | ((src[1] << 8) & 0xFF00));
|
|
src+=2;
|
|
}
|
|
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;
|
|
*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++ = 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);
|
|
|
|
src++;
|
|
}
|
|
break;
|
|
case CODEC_ID_ADPCM_IMA_DK3:
|
|
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].step_index = src[14];
|
|
c->status[1].step_index = src[15];
|
|
/* sign extend the predictors */
|
|
src += 16;
|
|
diff_channel = c->status[1].predictor;
|
|
|
|
/* the DK3_GET_NEXT_NIBBLE macro issues the break statement when
|
|
* the buffer is consumed */
|
|
while (1) {
|
|
|
|
/* for this algorithm, c->status[0] is the sum channel and
|
|
* c->status[1] is the diff channel */
|
|
|
|
/* process the first predictor of the sum channel */
|
|
DK3_GET_NEXT_NIBBLE();
|
|
adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
|
|
|
|
/* process the diff channel predictor */
|
|
DK3_GET_NEXT_NIBBLE();
|
|
adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
|
|
|
|
/* process the first pair of stereo PCM samples */
|
|
diff_channel = (diff_channel + c->status[1].predictor) / 2;
|
|
*samples++ = c->status[0].predictor + c->status[1].predictor;
|
|
*samples++ = c->status[0].predictor - c->status[1].predictor;
|
|
|
|
/* process the second predictor of the sum channel */
|
|
DK3_GET_NEXT_NIBBLE();
|
|
adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
|
|
|
|
/* process the second pair of stereo PCM samples */
|
|
diff_channel = (diff_channel + c->status[1].predictor) / 2;
|
|
*samples++ = c->status[0].predictor + c->status[1].predictor;
|
|
*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) {
|
|
|
|
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);
|
|
} 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);
|
|
}
|
|
|
|
src++;
|
|
}
|
|
break;
|
|
case CODEC_ID_ADPCM_XA:
|
|
c->status[0].sample1 = c->status[0].sample2 =
|
|
c->status[1].sample1 = c->status[1].sample2 = 0;
|
|
while (buf_size >= 128) {
|
|
xa_decode(samples, src, &c->status[0], &c->status[1],
|
|
avctx->channels);
|
|
src += 128;
|
|
samples += 28 * 8;
|
|
buf_size -= 128;
|
|
}
|
|
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];
|
|
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;
|
|
src++;
|
|
|
|
for (count2 = 0; count2 < 28; count2++) {
|
|
next_left_sample = (((*src & 0xF0) << 24) >> shift_left);
|
|
next_right_sample = (((*src & 0x0F) << 28) >> shift_right);
|
|
src++;
|
|
|
|
next_left_sample = (next_left_sample +
|
|
(current_left_sample * coeff1l) +
|
|
(previous_left_sample * coeff2l) + 0x80) >> 8;
|
|
next_right_sample = (next_right_sample +
|
|
(current_right_sample * coeff1r) +
|
|
(previous_right_sample * coeff2r) + 0x80) >> 8;
|
|
|
|
previous_left_sample = current_left_sample;
|
|
current_left_sample = av_clip_int16(next_left_sample);
|
|
previous_right_sample = current_right_sample;
|
|
current_right_sample = av_clip_int16(next_right_sample);
|
|
*samples++ = (unsigned short)current_left_sample;
|
|
*samples++ = (unsigned short)current_right_sample;
|
|
}
|
|
}
|
|
break;
|
|
case CODEC_ID_ADPCM_EA_R1:
|
|
case CODEC_ID_ADPCM_EA_R2:
|
|
case CODEC_ID_ADPCM_EA_R3: {
|
|
/* channel numbering
|
|
2chan: 0=fl, 1=fr
|
|
4chan: 0=fl, 1=rl, 2=fr, 3=rr
|
|
6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
|
|
const int big_endian = avctx->codec->id == CODEC_ID_ADPCM_EA_R3;
|
|
int32_t previous_sample, current_sample, next_sample;
|
|
int32_t coeff1, coeff2;
|
|
uint8_t shift;
|
|
unsigned int channel;
|
|
uint16_t *samplesC;
|
|
uint8_t *srcC;
|
|
|
|
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;
|
|
}
|
|
|
|
for (channel=0; channel<avctx->channels; channel++) {
|
|
srcC = src + (big_endian ? bytestream_get_be32(&src)
|
|
: bytestream_get_le32(&src))
|
|
+ (avctx->channels-channel-1) * 4;
|
|
samplesC = samples + channel;
|
|
|
|
if (avctx->codec->id == CODEC_ID_ADPCM_EA_R1) {
|
|
current_sample = (int16_t)bytestream_get_le16(&srcC);
|
|
previous_sample = (int16_t)bytestream_get_le16(&srcC);
|
|
} else {
|
|
current_sample = c->status[channel].predictor;
|
|
previous_sample = c->status[channel].prev_sample;
|
|
}
|
|
|
|
for (count1=0; count1<samples_in_chunk; count1++) {
|
|
if (*srcC == 0xEE) { /* only seen in R2 and R3 */
|
|
srcC++;
|
|
current_sample = (int16_t)bytestream_get_be16(&srcC);
|
|
previous_sample = (int16_t)bytestream_get_be16(&srcC);
|
|
|
|
for (count2=0; count2<28; count2++) {
|
|
*samplesC = (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;
|
|
|
|
for (count2=0; count2<28; count2++) {
|
|
if (count2 & 1)
|
|
next_sample = ((*srcC++ & 0x0F) << 28) >> shift;
|
|
else
|
|
next_sample = ((*srcC & 0xF0) << 24) >> shift;
|
|
|
|
next_sample += (current_sample * coeff1) +
|
|
(previous_sample * coeff2);
|
|
next_sample = av_clip_int16(next_sample >> 8);
|
|
|
|
previous_sample = current_sample;
|
|
current_sample = next_sample;
|
|
*samplesC = current_sample;
|
|
samplesC += avctx->channels;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (avctx->codec->id != CODEC_ID_ADPCM_EA_R1) {
|
|
c->status[channel].predictor = current_sample;
|
|
c->status[channel].prev_sample = previous_sample;
|
|
}
|
|
}
|
|
|
|
src = src + buf_size - (4 + 4*avctx->channels);
|
|
samples += 28 * samples_in_chunk * avctx->channels;
|
|
break;
|
|
}
|
|
case CODEC_ID_ADPCM_IMA_AMV:
|
|
case CODEC_ID_ADPCM_IMA_SMJPEG:
|
|
c->status[0].predictor = (int16_t)bytestream_get_le16(&src);
|
|
c->status[0].step_index = bytestream_get_le16(&src);
|
|
|
|
if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV)
|
|
src+=4;
|
|
|
|
while (src < buf + buf_size) {
|
|
char hi, lo;
|
|
lo = *src & 0x0F;
|
|
hi = (*src >> 4) & 0x0F;
|
|
|
|
if (avctx->codec->id == CODEC_ID_ADPCM_IMA_AMV)
|
|
FFSWAP(char, hi, lo);
|
|
|
|
*samples++ = adpcm_ima_expand_nibble(&c->status[0],
|
|
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++;
|
|
}
|
|
break;
|
|
case CODEC_ID_ADPCM_SBPRO_4:
|
|
case CODEC_ID_ADPCM_SBPRO_3:
|
|
case CODEC_ID_ADPCM_SBPRO_2:
|
|
if (!c->status[0].step_index) {
|
|
/* the first byte is a raw sample */
|
|
*samples++ = 128 * (*src++ - 0x80);
|
|
if (st)
|
|
*samples++ = 128 * (*src++ - 0x80);
|
|
c->status[0].step_index = 1;
|
|
}
|
|
if (avctx->codec->id == CODEC_ID_ADPCM_SBPRO_4) {
|
|
while (src < buf + buf_size) {
|
|
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
|
|
(src[0] >> 4) & 0x0F, 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) {
|
|
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
|
|
(src[0] >> 5) & 0x07, 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) {
|
|
*samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
|
|
(src[0] >> 6) & 0x03, 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;
|
|
case CODEC_ID_ADPCM_SWF:
|
|
{
|
|
GetBitContext gb;
|
|
const int *table;
|
|
int k0, signmask, nb_bits, count;
|
|
int size = buf_size*8;
|
|
|
|
init_get_bits(&gb, buf, size);
|
|
|
|
//read bits & initial values
|
|
nb_bits = get_bits(&gb, 2)+2;
|
|
//av_log(NULL,AV_LOG_INFO,"nb_bits: %d\n", nb_bits);
|
|
table = swf_index_tables[nb_bits-2];
|
|
k0 = 1 << (nb_bits-2);
|
|
signmask = 1 << (nb_bits-1);
|
|
|
|
while (get_bits_count(&gb) <= size - 22*avctx->channels) {
|
|
for (i = 0; i < avctx->channels; i++) {
|
|
*samples++ = c->status[i].predictor = get_sbits(&gb, 16);
|
|
c->status[i].step_index = get_bits(&gb, 6);
|
|
}
|
|
|
|
for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
|
|
int i;
|
|
|
|
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];
|
|
long vpdiff = 0; // vpdiff = (delta+0.5)*step/4
|
|
int k = k0;
|
|
|
|
do {
|
|
if (delta & k)
|
|
vpdiff += step;
|
|
step >>= 1;
|
|
k >>= 1;
|
|
} while(k);
|
|
vpdiff += step;
|
|
|
|
if (delta & signmask)
|
|
c->status[i].predictor -= vpdiff;
|
|
else
|
|
c->status[i].predictor += vpdiff;
|
|
|
|
c->status[i].step_index += table[delta & (~signmask)];
|
|
|
|
c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
src += buf_size;
|
|
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++;
|
|
}
|
|
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);
|
|
|
|
for (i = 0; i < 32; i++)
|
|
table[0][i] = (int16_t)bytestream_get_be16(&src);
|
|
|
|
/* Initialize the previous sample. */
|
|
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;
|
|
|
|
/* Read in every sample for this channel. */
|
|
for (i = 0; i < samplecnt / 14; i++) {
|
|
int index = (*src >> 4) & 7;
|
|
unsigned int exp = 28 - (*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;
|
|
|
|
sampledat = ((prev[ch][0]*factor1
|
|
+ prev[ch][1]*factor2) >> 11) + (sampledat>>exp);
|
|
*samples = av_clip_int16(sampledat);
|
|
prev[ch][1] = prev[ch][0];
|
|
prev[ch][0] = *samples++;
|
|
|
|
/* In case of stereo, skip one sample, this sample
|
|
is for the other channel. */
|
|
samples += st;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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;
|
|
return src - buf;
|
|
}
|
|
|
|
|
|
|
|
#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_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_EA_R1, adpcm_ea_r1);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_EA_R2, adpcm_ea_r2);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_EA_R3, adpcm_ea_r3);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_THP, adpcm_thp);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
|
|
ADPCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
|
|
|
|
#undef ADPCM_CODEC
|