| /* |
| * 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 "get_bits.h" |
| #include "put_bits.h" |
| #include "bytestream.h" |
| #include "adpcm.h" |
| #include "adpcm_data.h" |
| |
| /** |
| * @file |
| * ADPCM decoders |
| * First version by Francois Revol (revol@free.fr) |
| * Fringe ADPCM codecs (e.g., DK3, DK4, Westwood) |
| * by Mike Melanson (melanson@pcisys.net) |
| * 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) |
| * MAXIS EA ADPCM decoder by Robert Marston (rmarston@gmail.com) |
| * THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl) |
| * |
| * Features and limitations: |
| * |
| * Reference documents: |
| * http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs |
| * http://www.pcisys.net/~melanson/codecs/simpleaudio.html [dead] |
| * http://www.geocities.com/SiliconValley/8682/aud3.txt [dead] |
| * http://openquicktime.sourceforge.net/ |
| * XAnim sources (xa_codec.c) http://xanim.polter.net/ |
| * http://www.cs.ucla.edu/~leec/mediabench/applications.html [dead] |
| * SoX source code http://sox.sourceforge.net/ |
| * |
| * CD-ROM XA: |
| * http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html [dead] |
| * vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html [dead] |
| * readstr http://www.geocities.co.jp/Playtown/2004/ |
| */ |
| |
| /* 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 |
| }; |
| |
| // 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 } |
| }; |
| |
| /* end of tables */ |
| |
| typedef struct ADPCMDecodeContext { |
| AVFrame frame; |
| ADPCMChannelStatus status[6]; |
| int vqa_version; /**< VQA version. Used for ADPCM_IMA_WS */ |
| } ADPCMDecodeContext; |
| |
| static av_cold int adpcm_decode_init(AVCodecContext * avctx) |
| { |
| ADPCMDecodeContext *c = avctx->priv_data; |
| unsigned int min_channels = 1; |
| unsigned int max_channels = 2; |
| |
| switch(avctx->codec->id) { |
| case AV_CODEC_ID_ADPCM_EA: |
| min_channels = 2; |
| break; |
| case AV_CODEC_ID_ADPCM_EA_R1: |
| case AV_CODEC_ID_ADPCM_EA_R2: |
| case AV_CODEC_ID_ADPCM_EA_R3: |
| case AV_CODEC_ID_ADPCM_EA_XAS: |
| max_channels = 6; |
| break; |
| } |
| if (avctx->channels < min_channels || avctx->channels > max_channels) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| switch(avctx->codec->id) { |
| case AV_CODEC_ID_ADPCM_CT: |
| c->status[0].step = c->status[1].step = 511; |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_WAV: |
| if (avctx->bits_per_coded_sample != 4) { |
| av_log(avctx, AV_LOG_ERROR, "Only 4-bit ADPCM IMA WAV files are supported\n"); |
| return -1; |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_APC: |
| if (avctx->extradata && avctx->extradata_size >= 8) { |
| c->status[0].predictor = AV_RL32(avctx->extradata); |
| c->status[1].predictor = AV_RL32(avctx->extradata + 4); |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_WS: |
| if (avctx->extradata && avctx->extradata_size >= 2) |
| c->vqa_version = AV_RL16(avctx->extradata); |
| break; |
| default: |
| break; |
| } |
| avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
| |
| avcodec_get_frame_defaults(&c->frame); |
| avctx->coded_frame = &c->frame; |
| |
| 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 = ff_adpcm_step_table[c->step_index]; |
| step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble]; |
| step_index = av_clip(step_index, 0, 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 int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble, int shift) |
| { |
| int step_index; |
| int predictor; |
| int diff, step; |
| |
| step = ff_adpcm_step_table[c->step_index]; |
| step_index = c->step_index + ff_adpcm_index_table[nibble]; |
| step_index = av_clip(step_index, 0, 88); |
| |
| diff = step >> 3; |
| if (nibble & 4) diff += step; |
| if (nibble & 2) diff += step >> 1; |
| if (nibble & 1) diff += step >> 2; |
| |
| if (nibble & 8) |
| predictor = c->predictor - diff; |
| else |
| predictor = c->predictor + diff; |
| |
| c->predictor = av_clip_int16(predictor); |
| c->step_index = step_index; |
| |
| return c->predictor; |
| } |
| |
| static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble) |
| { |
| int predictor; |
| |
| predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64; |
| predictor += ((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta; |
| |
| c->sample2 = c->sample1; |
| c->sample1 = av_clip_int16(predictor); |
| c->idelta = (ff_adpcm_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 = (ff_adpcm_AdaptationTable[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 * ff_adpcm_yamaha_difflookup[nibble]) / 8; |
| c->predictor = av_clip_int16(c->predictor); |
| c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8; |
| c->step = av_clip(c->step, 127, 24567); |
| return c->predictor; |
| } |
| |
| static int xa_decode(AVCodecContext *avctx, |
| 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; |
| if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) { |
| av_log_ask_for_sample(avctx, "unknown XA-ADPCM filter %d\n", filter); |
| filter=0; |
| } |
| 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 = sign_extend(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 */ |
| 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; |
| if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) { |
| av_log_ask_for_sample(avctx, "unknown XA-ADPCM filter %d\n", filter); |
| filter=0; |
| } |
| |
| 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 = sign_extend(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 */ |
| right->sample1 = s_1; |
| right->sample2 = s_2; |
| out -= 1; |
| } else { |
| left->sample1 = s_1; |
| left->sample2 = s_2; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples) |
| { |
| ADPCMDecodeContext *c = avctx->priv_data; |
| GetBitContext gb; |
| const int *table; |
| int k0, signmask, nb_bits, count; |
| int size = buf_size*8; |
| int i; |
| |
| 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 = ff_adpcm_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; |
| } |
| } |
| } |
| } |
| |
| /** |
| * Get the number of samples that will be decoded from the packet. |
| * In one case, this is actually the maximum number of samples possible to |
| * decode with the given buf_size. |
| * |
| * @param[out] coded_samples set to the number of samples as coded in the |
| * packet, or 0 if the codec does not encode the |
| * number of samples in each frame. |
| */ |
| static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb, |
| int buf_size, int *coded_samples) |
| { |
| ADPCMDecodeContext *s = avctx->priv_data; |
| int nb_samples = 0; |
| int ch = avctx->channels; |
| int has_coded_samples = 0; |
| int header_size; |
| |
| *coded_samples = 0; |
| |
| if(ch <= 0) |
| return 0; |
| |
| switch (avctx->codec->id) { |
| /* constant, only check buf_size */ |
| case AV_CODEC_ID_ADPCM_EA_XAS: |
| if (buf_size < 76 * ch) |
| return 0; |
| nb_samples = 128; |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_QT: |
| if (buf_size < 34 * ch) |
| return 0; |
| nb_samples = 64; |
| break; |
| /* simple 4-bit adpcm */ |
| case AV_CODEC_ID_ADPCM_CT: |
| case AV_CODEC_ID_ADPCM_IMA_APC: |
| case AV_CODEC_ID_ADPCM_IMA_EA_SEAD: |
| case AV_CODEC_ID_ADPCM_IMA_WS: |
| case AV_CODEC_ID_ADPCM_YAMAHA: |
| nb_samples = buf_size * 2 / ch; |
| break; |
| } |
| if (nb_samples) |
| return nb_samples; |
| |
| /* simple 4-bit adpcm, with header */ |
| header_size = 0; |
| switch (avctx->codec->id) { |
| case AV_CODEC_ID_ADPCM_4XM: |
| case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break; |
| case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break; |
| case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4; break; |
| } |
| if (header_size > 0) |
| return (buf_size - header_size) * 2 / ch; |
| |
| /* more complex formats */ |
| switch (avctx->codec->id) { |
| case AV_CODEC_ID_ADPCM_EA: |
| has_coded_samples = 1; |
| *coded_samples = bytestream2_get_le32(gb); |
| *coded_samples -= *coded_samples % 28; |
| nb_samples = (buf_size - 12) / 30 * 28; |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_EA_EACS: |
| has_coded_samples = 1; |
| *coded_samples = bytestream2_get_le32(gb); |
| nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch; |
| break; |
| case AV_CODEC_ID_ADPCM_EA_MAXIS_XA: |
| nb_samples = (buf_size - ch) / ch * 2; |
| break; |
| case AV_CODEC_ID_ADPCM_EA_R1: |
| case AV_CODEC_ID_ADPCM_EA_R2: |
| case AV_CODEC_ID_ADPCM_EA_R3: |
| /* maximum number of samples */ |
| /* has internal offsets and a per-frame switch to signal raw 16-bit */ |
| has_coded_samples = 1; |
| switch (avctx->codec->id) { |
| case AV_CODEC_ID_ADPCM_EA_R1: |
| header_size = 4 + 9 * ch; |
| *coded_samples = bytestream2_get_le32(gb); |
| break; |
| case AV_CODEC_ID_ADPCM_EA_R2: |
| header_size = 4 + 5 * ch; |
| *coded_samples = bytestream2_get_le32(gb); |
| break; |
| case AV_CODEC_ID_ADPCM_EA_R3: |
| header_size = 4 + 5 * ch; |
| *coded_samples = bytestream2_get_be32(gb); |
| break; |
| } |
| *coded_samples -= *coded_samples % 28; |
| nb_samples = (buf_size - header_size) * 2 / ch; |
| nb_samples -= nb_samples % 28; |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_DK3: |
| if (avctx->block_align > 0) |
| buf_size = FFMIN(buf_size, avctx->block_align); |
| nb_samples = ((buf_size - 16) * 2 / 3 * 4) / ch; |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_DK4: |
| if (avctx->block_align > 0) |
| buf_size = FFMIN(buf_size, avctx->block_align); |
| nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch; |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_WAV: |
| if (avctx->block_align > 0) |
| buf_size = FFMIN(buf_size, avctx->block_align); |
| nb_samples = 1 + (buf_size - 4 * ch) / (4 * ch) * 8; |
| break; |
| case AV_CODEC_ID_ADPCM_MS: |
| if (avctx->block_align > 0) |
| buf_size = FFMIN(buf_size, avctx->block_align); |
| nb_samples = 2 + (buf_size - 7 * ch) * 2 / ch; |
| break; |
| case AV_CODEC_ID_ADPCM_SBPRO_2: |
| case AV_CODEC_ID_ADPCM_SBPRO_3: |
| case AV_CODEC_ID_ADPCM_SBPRO_4: |
| { |
| int samples_per_byte; |
| switch (avctx->codec->id) { |
| case AV_CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break; |
| case AV_CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break; |
| case AV_CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break; |
| } |
| if (!s->status[0].step_index) { |
| nb_samples++; |
| buf_size -= ch; |
| } |
| nb_samples += buf_size * samples_per_byte / ch; |
| break; |
| } |
| case AV_CODEC_ID_ADPCM_SWF: |
| { |
| int buf_bits = buf_size * 8 - 2; |
| int nbits = (bytestream2_get_byte(gb) >> 6) + 2; |
| int block_hdr_size = 22 * ch; |
| int block_size = block_hdr_size + nbits * ch * 4095; |
| int nblocks = buf_bits / block_size; |
| int bits_left = buf_bits - nblocks * block_size; |
| nb_samples = nblocks * 4096; |
| if (bits_left >= block_hdr_size) |
| nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch); |
| break; |
| } |
| case AV_CODEC_ID_ADPCM_THP: |
| has_coded_samples = 1; |
| bytestream2_skip(gb, 4); // channel size |
| *coded_samples = bytestream2_get_be32(gb); |
| *coded_samples -= *coded_samples % 14; |
| nb_samples = (buf_size - 80) / (8 * ch) * 14; |
| break; |
| case AV_CODEC_ID_ADPCM_XA: |
| nb_samples = (buf_size / 128) * 224 / ch; |
| break; |
| } |
| |
| /* validate coded sample count */ |
| if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples)) |
| return AVERROR_INVALIDDATA; |
| |
| return nb_samples; |
| } |
| |
| static int adpcm_decode_frame(AVCodecContext *avctx, void *data, |
| int *got_frame_ptr, AVPacket *avpkt) |
| { |
| const uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| ADPCMDecodeContext *c = avctx->priv_data; |
| ADPCMChannelStatus *cs; |
| int n, m, channel, i; |
| short *samples; |
| int st; /* stereo */ |
| int count1, count2; |
| int nb_samples, coded_samples, ret; |
| GetByteContext gb; |
| |
| bytestream2_init(&gb, buf, buf_size); |
| nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples); |
| if (nb_samples <= 0) { |
| av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* get output buffer */ |
| c->frame.nb_samples = nb_samples; |
| if ((ret = avctx->get_buffer(avctx, &c->frame)) < 0) { |
| av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
| return ret; |
| } |
| samples = (short *)c->frame.data[0]; |
| |
| /* use coded_samples when applicable */ |
| /* it is always <= nb_samples, so the output buffer will be large enough */ |
| if (coded_samples) { |
| if (coded_samples != nb_samples) |
| av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n"); |
| c->frame.nb_samples = nb_samples = coded_samples; |
| } |
| |
| st = avctx->channels == 2 ? 1 : 0; |
| |
| switch(avctx->codec->id) { |
| case AV_CODEC_ID_ADPCM_IMA_QT: |
| /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples). |
| Channel data is interleaved per-chunk. */ |
| for (channel = 0; channel < avctx->channels; channel++) { |
| int predictor; |
| int step_index; |
| cs = &(c->status[channel]); |
| /* (pppppp) (piiiiiii) */ |
| |
| /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */ |
| predictor = sign_extend(bytestream2_get_be16u(&gb), 16); |
| step_index = predictor & 0x7F; |
| predictor &= ~0x7F; |
| |
| if (cs->step_index == step_index) { |
| int diff = predictor - cs->predictor; |
| if (diff < 0) |
| diff = - diff; |
| if (diff > 0x7f) |
| goto update; |
| } else { |
| update: |
| cs->step_index = step_index; |
| cs->predictor = predictor; |
| } |
| |
| if (cs->step_index > 88u){ |
| av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| channel, cs->step_index); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| samples = (short *)c->frame.data[0] + channel; |
| |
| for (m = 0; m < 32; m++) { |
| int byte = bytestream2_get_byteu(&gb); |
| *samples = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F, 3); |
| samples += avctx->channels; |
| *samples = adpcm_ima_qt_expand_nibble(cs, byte >> 4 , 3); |
| samples += avctx->channels; |
| } |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_WAV: |
| for(i=0; i<avctx->channels; i++){ |
| cs = &(c->status[i]); |
| cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16); |
| |
| cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16); |
| if (cs->step_index > 88u){ |
| av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| i, cs->step_index); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| for (n = (nb_samples - 1) / 8; n > 0; n--) { |
| for (i = 0; i < avctx->channels; i++) { |
| cs = &c->status[i]; |
| for (m = 0; m < 4; m++) { |
| int v = bytestream2_get_byteu(&gb); |
| *samples = adpcm_ima_expand_nibble(cs, v & 0x0F, 3); |
| samples += avctx->channels; |
| *samples = adpcm_ima_expand_nibble(cs, v >> 4 , 3); |
| samples += avctx->channels; |
| } |
| samples -= 8 * avctx->channels - 1; |
| } |
| samples += 7 * avctx->channels; |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_4XM: |
| for (i = 0; i < avctx->channels; i++) |
| c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16); |
| |
| for (i = 0; i < avctx->channels; i++) { |
| c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16); |
| if (c->status[i].step_index > 88u) { |
| av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| i, c->status[i].step_index); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| for (i = 0; i < avctx->channels; i++) { |
| samples = (short *)c->frame.data[0] + i; |
| cs = &c->status[i]; |
| for (n = nb_samples >> 1; n > 0; n--) { |
| int v = bytestream2_get_byteu(&gb); |
| *samples = adpcm_ima_expand_nibble(cs, v & 0x0F, 4); |
| samples += avctx->channels; |
| *samples = adpcm_ima_expand_nibble(cs, v >> 4 , 4); |
| samples += avctx->channels; |
| } |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_MS: |
| { |
| int block_predictor; |
| |
| block_predictor = bytestream2_get_byteu(&gb); |
| if (block_predictor > 6) { |
| av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n", |
| block_predictor); |
| return AVERROR_INVALIDDATA; |
| } |
| c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor]; |
| c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor]; |
| if (st) { |
| block_predictor = bytestream2_get_byteu(&gb); |
| if (block_predictor > 6) { |
| av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n", |
| block_predictor); |
| return AVERROR_INVALIDDATA; |
| } |
| c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor]; |
| c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor]; |
| } |
| c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16); |
| if (st){ |
| c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16); |
| } |
| |
| c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16); |
| if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16); |
| c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16); |
| if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16); |
| |
| *samples++ = c->status[0].sample2; |
| if (st) *samples++ = c->status[1].sample2; |
| *samples++ = c->status[0].sample1; |
| if (st) *samples++ = c->status[1].sample1; |
| for(n = (nb_samples - 2) >> (1 - st); n > 0; n--) { |
| int byte = bytestream2_get_byteu(&gb); |
| *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 ); |
| *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F); |
| } |
| break; |
| } |
| case AV_CODEC_ID_ADPCM_IMA_DK4: |
| for (channel = 0; channel < avctx->channels; channel++) { |
| cs = &c->status[channel]; |
| cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16); |
| cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16); |
| if (cs->step_index > 88u){ |
| av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| channel, cs->step_index); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| for (n = nb_samples >> (1 - st); n > 0; n--) { |
| int v = bytestream2_get_byteu(&gb); |
| *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3); |
| *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3); |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_DK3: |
| { |
| int last_byte = 0; |
| int nibble; |
| int decode_top_nibble_next = 0; |
| int diff_channel; |
| const int16_t *samples_end = samples + avctx->channels * nb_samples; |
| |
| bytestream2_skipu(&gb, 10); |
| c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16); |
| c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16); |
| c->status[0].step_index = bytestream2_get_byteu(&gb); |
| c->status[1].step_index = bytestream2_get_byteu(&gb); |
| if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){ |
| av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n", |
| c->status[0].step_index, c->status[1].step_index); |
| return AVERROR_INVALIDDATA; |
| } |
| /* sign extend the predictors */ |
| diff_channel = c->status[1].predictor; |
| |
| /* DK3 ADPCM support macro */ |
| #define DK3_GET_NEXT_NIBBLE() \ |
| if (decode_top_nibble_next) { \ |
| nibble = last_byte >> 4; \ |
| decode_top_nibble_next = 0; \ |
| } else { \ |
| last_byte = bytestream2_get_byteu(&gb); \ |
| nibble = last_byte & 0x0F; \ |
| decode_top_nibble_next = 1; \ |
| } |
| |
| while (samples < samples_end) { |
| |
| /* 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 AV_CODEC_ID_ADPCM_IMA_ISS: |
| for (channel = 0; channel < avctx->channels; channel++) { |
| cs = &c->status[channel]; |
| cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16); |
| cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16); |
| if (cs->step_index > 88u){ |
| av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| channel, cs->step_index); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| for (n = nb_samples >> (1 - st); n > 0; n--) { |
| int v1, v2; |
| int v = bytestream2_get_byteu(&gb); |
| /* nibbles are swapped for mono */ |
| if (st) { |
| v1 = v >> 4; |
| v2 = v & 0x0F; |
| } else { |
| v2 = v >> 4; |
| v1 = v & 0x0F; |
| } |
| *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3); |
| *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3); |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_APC: |
| while (bytestream2_get_bytes_left(&gb) > 0) { |
| int v = bytestream2_get_byteu(&gb); |
| *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3); |
| *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3); |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_WS: |
| if (c->vqa_version == 3) { |
| for (channel = 0; channel < avctx->channels; channel++) { |
| int16_t *smp = samples + channel; |
| |
| for (n = nb_samples / 2; n > 0; n--) { |
| int v = bytestream2_get_byteu(&gb); |
| *smp = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3); |
| smp += avctx->channels; |
| *smp = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3); |
| smp += avctx->channels; |
| } |
| } |
| } else { |
| for (n = nb_samples / 2; n > 0; n--) { |
| for (channel = 0; channel < avctx->channels; channel++) { |
| int v = bytestream2_get_byteu(&gb); |
| *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3); |
| samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3); |
| } |
| samples += avctx->channels; |
| } |
| } |
| bytestream2_seek(&gb, 0, SEEK_END); |
| break; |
| case AV_CODEC_ID_ADPCM_XA: |
| while (bytestream2_get_bytes_left(&gb) >= 128) { |
| if ((ret = xa_decode(avctx, samples, buf + bytestream2_tell(&gb), &c->status[0], |
| &c->status[1], avctx->channels)) < 0) |
| return ret; |
| bytestream2_skipu(&gb, 128); |
| samples += 28 * 8; |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_EA_EACS: |
| for (i=0; i<=st; i++) { |
| c->status[i].step_index = bytestream2_get_le32u(&gb); |
| if (c->status[i].step_index > 88u) { |
| av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| i, c->status[i].step_index); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| for (i=0; i<=st; i++) |
| c->status[i].predictor = bytestream2_get_le32u(&gb); |
| |
| for (n = nb_samples >> (1 - st); n > 0; n--) { |
| int byte = bytestream2_get_byteu(&gb); |
| *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3); |
| *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3); |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_EA_SEAD: |
| for (n = nb_samples >> (1 - st); n > 0; n--) { |
| int byte = bytestream2_get_byteu(&gb); |
| *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6); |
| *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6); |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_EA: |
| { |
| int previous_left_sample, previous_right_sample; |
| int current_left_sample, current_right_sample; |
| int next_left_sample, next_right_sample; |
| int coeff1l, coeff2l, coeff1r, coeff2r; |
| int shift_left, shift_right; |
| |
| /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces, |
| each coding 28 stereo samples. */ |
| |
| if(avctx->channels != 2) |
| return AVERROR_INVALIDDATA; |
| |
| current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16); |
| previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16); |
| current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16); |
| previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16); |
| |
| for (count1 = 0; count1 < nb_samples / 28; count1++) { |
| int byte = bytestream2_get_byteu(&gb); |
| coeff1l = ea_adpcm_table[ byte >> 4 ]; |
| coeff2l = ea_adpcm_table[(byte >> 4 ) + 4]; |
| coeff1r = ea_adpcm_table[ byte & 0x0F]; |
| coeff2r = ea_adpcm_table[(byte & 0x0F) + 4]; |
| |
| byte = bytestream2_get_byteu(&gb); |
| shift_left = 20 - (byte >> 4); |
| shift_right = 20 - (byte & 0x0F); |
| |
| for (count2 = 0; count2 < 28; count2++) { |
| byte = bytestream2_get_byteu(&gb); |
| next_left_sample = sign_extend(byte >> 4, 4) << shift_left; |
| next_right_sample = sign_extend(byte, 4) << shift_right; |
| |
| 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++ = current_left_sample; |
| *samples++ = current_right_sample; |
| } |
| } |
| |
| bytestream2_skip(&gb, 2); // Skip terminating 0x0000 |
| |
| break; |
| } |
| case AV_CODEC_ID_ADPCM_EA_MAXIS_XA: |
| { |
| int coeff[2][2], shift[2]; |
| |
| for(channel = 0; channel < avctx->channels; channel++) { |
| int byte = bytestream2_get_byteu(&gb); |
| for (i=0; i<2; i++) |
| coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i]; |
| shift[channel] = 20 - (byte & 0x0F); |
| } |
| for (count1 = 0; count1 < nb_samples / 2; count1++) { |
| int byte[2]; |
| |
| byte[0] = bytestream2_get_byteu(&gb); |
| if (st) byte[1] = bytestream2_get_byteu(&gb); |
| for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */ |
| for(channel = 0; channel < avctx->channels; channel++) { |
| int sample = sign_extend(byte[channel] >> i, 4) << shift[channel]; |
| sample = (sample + |
| c->status[channel].sample1 * coeff[channel][0] + |
| c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8; |
| c->status[channel].sample2 = c->status[channel].sample1; |
| c->status[channel].sample1 = av_clip_int16(sample); |
| *samples++ = c->status[channel].sample1; |
| } |
| } |
| } |
| bytestream2_seek(&gb, 0, SEEK_END); |
| break; |
| } |
| case AV_CODEC_ID_ADPCM_EA_R1: |
| case AV_CODEC_ID_ADPCM_EA_R2: |
| case AV_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 == AV_CODEC_ID_ADPCM_EA_R3; |
| int previous_sample, current_sample, next_sample; |
| int coeff1, coeff2; |
| int shift; |
| unsigned int channel; |
| uint16_t *samplesC; |
| int count = 0; |
| int offsets[6]; |
| |
| for (channel=0; channel<avctx->channels; channel++) |
| offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) : |
| bytestream2_get_le32(&gb)) + |
| (avctx->channels + 1) * 4; |
| |
| for (channel=0; channel<avctx->channels; channel++) { |
| bytestream2_seek(&gb, offsets[channel], SEEK_SET); |
| samplesC = samples + channel; |
| |
| if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) { |
| current_sample = sign_extend(bytestream2_get_le16(&gb), 16); |
| previous_sample = sign_extend(bytestream2_get_le16(&gb), 16); |
| } else { |
| current_sample = c->status[channel].predictor; |
| previous_sample = c->status[channel].prev_sample; |
| } |
| |
| for (count1 = 0; count1 < nb_samples / 28; count1++) { |
| int byte = bytestream2_get_byte(&gb); |
| if (byte == 0xEE) { /* only seen in R2 and R3 */ |
| current_sample = sign_extend(bytestream2_get_be16(&gb), 16); |
| previous_sample = sign_extend(bytestream2_get_be16(&gb), 16); |
| |
| for (count2=0; count2<28; count2++) { |
| *samplesC = sign_extend(bytestream2_get_be16(&gb), 16); |
| samplesC += avctx->channels; |
| } |
| } else { |
| coeff1 = ea_adpcm_table[ byte >> 4 ]; |
| coeff2 = ea_adpcm_table[(byte >> 4) + 4]; |
| shift = 20 - (byte & 0x0F); |
| |
| for (count2=0; count2<28; count2++) { |
| if (count2 & 1) |
| next_sample = sign_extend(byte, 4) << shift; |
| else { |
| byte = bytestream2_get_byte(&gb); |
| next_sample = sign_extend(byte >> 4, 4) << 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 (!count) { |
| count = count1; |
| } else if (count != count1) { |
| av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n"); |
| count = FFMAX(count, count1); |
| } |
| |
| if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) { |
| c->status[channel].predictor = current_sample; |
| c->status[channel].prev_sample = previous_sample; |
| } |
| } |
| |
| c->frame.nb_samples = count * 28; |
| bytestream2_seek(&gb, 0, SEEK_END); |
| break; |
| } |
| case AV_CODEC_ID_ADPCM_EA_XAS: |
| 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) { |
| int val = sign_extend(bytestream2_get_le16u(&gb), 16); |
| for (i=0; i<2; i++) |
| coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i]; |
| s[0] = val & ~0x0F; |
| |
| val = sign_extend(bytestream2_get_le16u(&gb), 16); |
| shift[n] = 20 - (val & 0x0F); |
| s[avctx->channels] = val & ~0x0F; |
| } |
| |
| for (m=2; m<32; m+=2) { |
| s = &samples[m*avctx->channels + channel]; |
| for (n=0; n<4; n++, s+=32*avctx->channels) { |
| int byte = bytestream2_get_byteu(&gb); |
| for (s2=s, i=0; i<8; i+=4, s2+=avctx->channels) { |
| int level = sign_extend(byte >> (4 - i), 4) << shift[n]; |
| int pred = s2[-1*avctx->channels] * coeff[0][n] |
| + s2[-2*avctx->channels] * coeff[1][n]; |
| s2[0] = av_clip_int16((level + pred + 0x80) >> 8); |
| } |
| } |
| } |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_IMA_AMV: |
| case AV_CODEC_ID_ADPCM_IMA_SMJPEG: |
| if (avctx->codec->id == AV_CODEC_ID_ADPCM_IMA_AMV) { |
| c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16); |
| c->status[0].step_index = bytestream2_get_le16u(&gb); |
| bytestream2_skipu(&gb, 4); |
| } else { |
| c->status[0].predictor = sign_extend(bytestream2_get_be16u(&gb), 16); |
| c->status[0].step_index = bytestream2_get_byteu(&gb); |
| bytestream2_skipu(&gb, 1); |
| } |
| if (c->status[0].step_index > 88u) { |
| av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", |
| c->status[0].step_index); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| for (n = nb_samples >> (1 - st); n > 0; n--) { |
| int hi, lo, v = bytestream2_get_byteu(&gb); |
| |
| if (avctx->codec->id == AV_CODEC_ID_ADPCM_IMA_AMV) { |
| hi = v & 0x0F; |
| lo = v >> 4; |
| } else { |
| lo = v & 0x0F; |
| hi = v >> 4; |
| } |
| |
| *samples++ = adpcm_ima_expand_nibble(&c->status[0], lo, 3); |
| *samples++ = adpcm_ima_expand_nibble(&c->status[0], hi, 3); |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_CT: |
| for (n = nb_samples >> (1 - st); n > 0; n--) { |
| int v = bytestream2_get_byteu(&gb); |
| *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 ); |
| *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F); |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_SBPRO_4: |
| case AV_CODEC_ID_ADPCM_SBPRO_3: |
| case AV_CODEC_ID_ADPCM_SBPRO_2: |
| if (!c->status[0].step_index) { |
| /* the first byte is a raw sample */ |
| *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80); |
| if (st) |
| *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80); |
| c->status[0].step_index = 1; |
| nb_samples--; |
| } |
| if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) { |
| for (n = nb_samples >> (1 - st); n > 0; n--) { |
| int byte = bytestream2_get_byteu(&gb); |
| *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| byte >> 4, 4, 0); |
| *samples++ = adpcm_sbpro_expand_nibble(&c->status[st], |
| byte & 0x0F, 4, 0); |
| } |
| } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) { |
| for (n = nb_samples / 3; n > 0; n--) { |
| int byte = bytestream2_get_byteu(&gb); |
| *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| byte >> 5 , 3, 0); |
| *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| (byte >> 2) & 0x07, 3, 0); |
| *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| byte & 0x03, 2, 0); |
| } |
| } else { |
| for (n = nb_samples >> (2 - st); n > 0; n--) { |
| int byte = bytestream2_get_byteu(&gb); |
| *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| byte >> 6 , 2, 2); |
| *samples++ = adpcm_sbpro_expand_nibble(&c->status[st], |
| (byte >> 4) & 0x03, 2, 2); |
| *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| (byte >> 2) & 0x03, 2, 2); |
| *samples++ = adpcm_sbpro_expand_nibble(&c->status[st], |
| byte & 0x03, 2, 2); |
| } |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_SWF: |
| adpcm_swf_decode(avctx, buf, buf_size, samples); |
| bytestream2_seek(&gb, 0, SEEK_END); |
| break; |
| case AV_CODEC_ID_ADPCM_YAMAHA: |
| for (n = nb_samples >> (1 - st); n > 0; n--) { |
| int v = bytestream2_get_byteu(&gb); |
| *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F); |
| *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 ); |
| } |
| break; |
| case AV_CODEC_ID_ADPCM_THP: |
| { |
| int table[2][16]; |
| int prev[2][2]; |
| int ch; |
| |
| for (i = 0; i < 2; i++) |
| for (n = 0; n < 16; n++) |
| table[i][n] = sign_extend(bytestream2_get_be16u(&gb), 16); |
| |
| /* Initialize the previous sample. */ |
| for (i = 0; i < 2; i++) |
| for (n = 0; n < 2; n++) |
| prev[i][n] = sign_extend(bytestream2_get_be16u(&gb), 16); |
| |
| for (ch = 0; ch <= st; ch++) { |
| samples = (short *)c->frame.data[0] + ch; |
| |
| /* Read in every sample for this channel. */ |
| for (i = 0; i < nb_samples / 14; i++) { |
| int byte = bytestream2_get_byteu(&gb); |
| int index = (byte >> 4) & 7; |
| unsigned int exp = byte & 0x0F; |
| 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 = sign_extend(byte, 4); |
| } else { |
| byte = bytestream2_get_byteu(&gb); |
| sampledat = sign_extend(byte >> 4, 4); |
| } |
| |
| 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; |
| } |
| } |
| } |
| break; |
| } |
| |
| default: |
| return -1; |
| } |
| |
| *got_frame_ptr = 1; |
| *(AVFrame *)data = c->frame; |
| |
| return bytestream2_tell(&gb); |
| } |
| |
| |
| #define ADPCM_DECODER(id_, name_, long_name_) \ |
| AVCodec ff_ ## name_ ## _decoder = { \ |
| .name = #name_, \ |
| .type = AVMEDIA_TYPE_AUDIO, \ |
| .id = id_, \ |
| .priv_data_size = sizeof(ADPCMDecodeContext), \ |
| .init = adpcm_decode_init, \ |
| .decode = adpcm_decode_frame, \ |
| .capabilities = CODEC_CAP_DR1, \ |
| .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ |
| } |
| |
| /* Note: Do not forget to add new entries to the Makefile as well. */ |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, adpcm_4xm, "ADPCM 4X Movie"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, adpcm_ct, "ADPCM Creative Technology"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, adpcm_ea, "ADPCM Electronic Arts"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_MAXIS_XA, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, adpcm_ea_r1, "ADPCM Electronic Arts R1"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, adpcm_ea_r2, "ADPCM Electronic Arts R2"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, adpcm_ea_r3, "ADPCM Electronic Arts R3"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, adpcm_ea_xas, "ADPCM Electronic Arts XAS"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv, "ADPCM IMA AMV"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, adpcm_ima_apc, "ADPCM IMA CRYO APC"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3, "ADPCM IMA Duck DK3"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4, "ADPCM IMA Duck DK4"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, adpcm_ima_iss, "ADPCM IMA Funcom ISS"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt, "ADPCM IMA QuickTime"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav, "ADPCM IMA WAV"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws, "ADPCM IMA Westwood"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_MS, adpcm_ms, "ADPCM Microsoft"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF, adpcm_swf, "ADPCM Shockwave Flash"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP, adpcm_thp, "ADPCM Nintendo Gamecube THP"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA, adpcm_xa, "ADPCM CDROM XA"); |
| ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha, "ADPCM Yamaha"); |