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Diffstat (limited to 'src/libffmpeg/libavcodec/adpcm.c')
-rw-r--r--src/libffmpeg/libavcodec/adpcm.c1370
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diff --git a/src/libffmpeg/libavcodec/adpcm.c b/src/libffmpeg/libavcodec/adpcm.c
deleted file mode 100644
index 9be4c2274..000000000
--- a/src/libffmpeg/libavcodec/adpcm.c
+++ /dev/null
@@ -1,1370 +0,0 @@
-/*
- * 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"
-
-/**
- * @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)
- *
- * 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
-
-#define CLAMP_TO_SHORT(value) \
-if (value > 32767) \
- value = 32767; \
-else if (value < -32768) \
- value = -32768; \
-
-/* 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[2];
- short sample_buffer[32]; /* hold left samples while waiting for right samples */
-
- /* SWF only */
- int nb_bits;
- int nb_samples;
-} 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;
- 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 = c->prev_sample + ((step_table[c->step_index] * yamaha_difflookup[nibble]) / 8);
- CLAMP_TO_SHORT(c->prev_sample);
- c->step_index = 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= clip(nibble, -8, 7)&0x0F;
-
- predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
- CLAMP_TO_SHORT(predictor);
-
- c->sample2 = c->sample1;
- c->sample1 = 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->predictor + ((c->step * yamaha_difflookup[nibble]) / 8);
- CLAMP_TO_SHORT(c->predictor);
- c->step = (c->step * yamaha_indexscale[nibble]) >> 8;
- c->step = 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)
- 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 = clip(div-range, -8, 6);
- const int nmax = 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;\
- CLAMP_TO_SHORT(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) {
-#define LOOP_NODES(NAME, STEP_TABLE, STEP_INDEX)\
- const int predictor = nodes[j]->sample1;\
- const int div = (sample - predictor) * 4 / STEP_TABLE;\
- int nmin = clip(div-range, -7, 6);\
- int nmax = 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], clip(step + index_table[nibble], 0, 88));
- } else { //CODEC_ID_ADPCM_YAMAHA
- LOOP_NODES(yamaha, step, 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 */
- *dst++ = (c->status[0].prev_sample) & 0xFF; /* little endian */
- *dst++ = (c->status[0].prev_sample >> 8) & 0xFF;
- *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; */
- *dst++ = (c->status[1].prev_sample) & 0xFF;
- *dst++ = (c->status[1].prev_sample >> 8) & 0xFF;
- *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]) & 0x0F;
- *dst |= (adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels]) << 4) & 0xF0;
- dst++;
- *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 2]) & 0x0F;
- *dst |= (adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 3]) << 4) & 0xF0;
- dst++;
- *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 4]) & 0x0F;
- *dst |= (adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 5]) << 4) & 0xF0;
- dst++;
- *dst = adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 6]) & 0x0F;
- *dst |= (adpcm_ima_compress_sample(&c->status[0], samples[avctx->channels * 7]) << 4) & 0xF0;
- 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_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;
-
- *dst++ = c->status[i].idelta & 0xFF;
- *dst++ = c->status[i].idelta >> 8;
- }
- for(i=0; i<avctx->channels; i++){
- c->status[i].sample1= *samples++;
-
- *dst++ = c->status[i].sample1 & 0xFF;
- *dst++ = c->status[i].sample1 >> 8;
- }
- for(i=0; i<avctx->channels; i++){
- c->status[i].sample2= *samples++;
-
- *dst++ = c->status[i].sample2 & 0xFF;
- *dst++ = c->status[i].sample2 >> 8;
- }
-
- 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;
-
- c->channel = 0;
- c->status[0].predictor = c->status[1].predictor = 0;
- c->status[0].step_index = c->status[1].step_index = 0;
- c->status[0].step = c->status[1].step = 0;
-
- switch(avctx->codec->id) {
- case CODEC_ID_ADPCM_CT:
- c->status[0].step = c->status[1].step = 511;
- 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;
-
- CLAMP_TO_SHORT(predictor);
- c->predictor = predictor;
- c->step_index = step_index;
-
- return (short)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;
- CLAMP_TO_SHORT(predictor);
-
- c->sample2 = c->sample1;
- c->sample1 = predictor;
- c->idelta = (AdaptationTable[(int)nibble] * c->idelta) >> 8;
- if (c->idelta < 16) c->idelta = 16;
-
- return (short)predictor;
-}
-
-static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble)
-{
- int predictor;
- 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 = c->predictor;
- /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
- if(sign)
- predictor = ((predictor * 254) >> 8) - diff;
- else
- predictor = ((predictor * 254) >> 8) + diff;
- /* calculate new step and clamp it to range 511..32767 */
- new_step = (ct_adpcm_table[nibble & 7] * c->step) >> 8;
- c->step = new_step;
- if(c->step < 511)
- c->step = 511;
- if(c->step > 32767)
- c->step = 32767;
-
- CLAMP_TO_SHORT(predictor);
- c->predictor = predictor;
- return (short)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);
-
- if (sign)
- c->predictor -= diff;
- else
- c->predictor += diff;
-
- /* clamp result */
- if (c->predictor > 16256)
- c->predictor = 16256;
- else if (c->predictor < -16384)
- c->predictor = -16384;
-
- /* 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;
- CLAMP_TO_SHORT(c->predictor);
- c->step = (c->step * yamaha_indexscale[nibble]) >> 8;
- c->step = 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);
- CLAMP_TO_SHORT(s);
- *out = s;
- out += inc;
- s_2 = s_1;
- s_1 = s;
- }
-
- 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);
- CLAMP_TO_SHORT(s);
- *out = s;
- out += inc;
- s_2 = s_1;
- s_1 = s;
- }
-
- 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;
- 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;
-
- samples = data;
- 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;
-
- CLAMP_TO_SHORT(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] = clip(*src++, 0, 7);
- block_predictor[1] = 0;
- if (st)
- block_predictor[1] = 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;
-
- 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;
- CLAMP_TO_SHORT(next_left_sample);
- CLAMP_TO_SHORT(next_right_sample);
-
- previous_left_sample = current_left_sample;
- current_left_sample = next_left_sample;
- previous_right_sample = current_right_sample;
- current_right_sample = next_right_sample;
- *samples++ = (unsigned short)current_left_sample;
- *samples++ = (unsigned short)current_right_sample;
- }
- }
- break;
- case CODEC_ID_ADPCM_IMA_SMJPEG:
- c->status[0].predictor = *src;
- src += 2;
- c->status[0].step_index = *src++;
- src++; /* skip another byte before getting to the meat */
- while (src < buf + buf_size) {
- *samples++ = adpcm_ima_expand_nibble(&c->status[0],
- *src & 0x0F, 3);
- *samples++ = adpcm_ima_expand_nibble(&c->status[0],
- (*src >> 4) & 0x0F, 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++ = 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++ = 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;
- int size = buf_size*8;
-
- init_get_bits(&gb, buf, size);
-
- // first frame, read bits & inital values
- if (!c->nb_bits)
- {
- c->nb_bits = get_bits(&gb, 2)+2;
-// av_log(NULL,AV_LOG_INFO,"nb_bits: %d\n", c->nb_bits);
- }
-
- table = swf_index_tables[c->nb_bits-2];
- k0 = 1 << (c->nb_bits-2);
- signmask = 1 << (c->nb_bits-1);
-
- while (get_bits_count(&gb) <= size)
- {
- int i;
-
- c->nb_samples++;
- // wrap around at every 4096 samples...
- if ((c->nb_samples & 0xfff) == 1)
- {
- for (i = 0; i <= st; i++)
- {
- *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
- c->status[i].step_index = get_bits(&gb, 6);
- }
- }
-
- // similar to IMA adpcm
- for (i = 0; i <= st; i++)
- {
- int delta = get_bits(&gb, c->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 = clip(c->status[i].step_index, 0, 88);
- c->status[i].predictor = clip(c->status[i].predictor, -32768, 32767);
-
- *samples++ = c->status[i].predictor;
- }
- }
-
-// src += get_bits_count(&gb)*8;
- src += 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;
- 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_IMA_QT, adpcm_ima_qt);
-ADPCM_CODEC(CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav);
-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_WS, adpcm_ima_ws);
-ADPCM_CODEC(CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg);
-ADPCM_CODEC(CODEC_ID_ADPCM_MS, adpcm_ms);
-ADPCM_CODEC(CODEC_ID_ADPCM_4XM, adpcm_4xm);
-ADPCM_CODEC(CODEC_ID_ADPCM_XA, adpcm_xa);
-ADPCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
-ADPCM_CODEC(CODEC_ID_ADPCM_CT, adpcm_ct);
-ADPCM_CODEC(CODEC_ID_ADPCM_SWF, adpcm_swf);
-ADPCM_CODEC(CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha);
-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);
-
-#undef ADPCM_CODEC
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 14:15:59 +0000