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Diffstat (limited to 'contrib/ffmpeg/libavcodec/adpcm.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/adpcm.c | 1602 |
1 files changed, 0 insertions, 1602 deletions
diff --git a/contrib/ffmpeg/libavcodec/adpcm.c b/contrib/ffmpeg/libavcodec/adpcm.c deleted file mode 100644 index eadcfaedd..000000000 --- a/contrib/ffmpeg/libavcodec/adpcm.c +++ /dev/null @@ -1,1602 +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" -#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) - * 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) - * 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_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_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_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, - const 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; - 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; - - 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 = *samples++ = (int16_t)(src[0] + (src[1]<<8)); - src+=2; - - 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: - 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_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; - } - - 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++) { - *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++) { - *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]; - 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; - const 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_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; - for (s2=s, i=0; i<2; i++, src+=2, s2+=avctx->channels) - s2[0] = (src[0]&0xF0) + (src[1]<<8); - } - - for (m=2; m<32; m+=2) { - 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 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: - 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_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_DECODER(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); |