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; int16_t **samples_p; 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 = ff_get_buffer(avctx, &c->frame)) < 0) { av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); return ret; } samples = (short *)c->frame.data[0]; samples_p = (int16_t **)c->frame.extended_data; /* 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 = samples_p[channel]; for (m = 0; m < 64; m += 2) { int byte = bytestream2_get_byteu(&gb); samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F, 3); samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 , 3); } } break; case AV_CODEC_ID_ADPCM_IMA_WAV: for(i=0; i<avctx->channels; i++){ cs = &(c->status[i]); cs->predictor = samples_p[i][0] = 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 = 0; n < (nb_samples - 1) / 8; n++) { for (i = 0; i < avctx->channels; i++) { cs = &c->status[i]; samples = &samples_p[i][1 + n * 8]; for (m = 0; m < 8; m += 2) { int v = bytestream2_get_byteu(&gb); samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3); samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3); } } } 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 = (int16_t *)c->frame.data[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++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4); } } 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_OKI: while (bytestream2_get_bytes_left(&gb) > 0) { int v = bytestream2_get_byteu(&gb); *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 ); *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F); } break; case AV_CODEC_ID_ADPCM_IMA_WS: if (c->vqa_version == 3) { for (channel = 0; channel < avctx->channels; channel++) { int16_t *smp = samples_p[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++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3); } } } 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: { int16_t *out0 = samples_p[0]; int16_t *out1 = samples_p[1]; int samples_per_block = 28 * (3 - avctx->channels) * 4; int sample_offset = 0; while (bytestream2_get_bytes_left(&gb) >= 128) { if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb), &c->status[0], &c->status[1], avctx->channels, sample_offset)) < 0) return ret; bytestream2_skipu(&gb, 128); sample_offset += samples_per_block; } 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_p[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); } 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; } } } 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]; int16_t *s = samples_p[channel]; for (n = 0; n < 4; n++, s += 32) { 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[1] = val & ~0x0F; } for (m=2; m<32; m+=2) { s = &samples_p[channel][m]; for (n = 0; n < 4; n++, s += 32) { int level, pred; int byte = bytestream2_get_byteu(&gb); level = sign_extend(byte >> 4, 4) << shift[n]; pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n]; s[0] = av_clip_int16((level + pred + 0x80) >> 8); level = sign_extend(byte, 4) << shift[n]; pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n]; s[1] = av_clip_int16((level + pred + 0x80) >> 8); } } } break; case 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); 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 v = bytestream2_get_byteu(&gb); *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3); *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3); } break; case AV_CODEC_ID_ADPCM_IMA_SMJPEG: for (i = 0; i < avctx->channels; i++) { c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16); c->status[i].step_index = bytestream2_get_byteu(&gb); bytestream2_skipu(&gb, 1); if (c->status[i].step_index > 88u) { av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", c->status[i].step_index); return AVERROR_INVALIDDATA; } } for (n = nb_samples >> (1 - st); n > 0; n--) { int v = bytestream2_get_byteu(&gb); *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4, 3); *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf, 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_AFC: { int samples_per_block; int blocks; if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) { samples_per_block = avctx->extradata[0] / 16; blocks = nb_samples / avctx->extradata[0]; } else { samples_per_block = nb_samples / 16; blocks = 1; } for (m = 0; m < blocks; m++) { for (channel = 0; channel < avctx->channels; channel++) { int prev1 = c->status[channel].sample1; int prev2 = c->status[channel].sample2; samples = samples_p[channel] + m * 16; /* Read in every sample for this channel. */ for (i = 0; i < samples_per_block; i++) { int byte = bytestream2_get_byteu(&gb); int scale = 1 << (byte >> 4); int index = byte & 0xf; int factor1 = ff_adpcm_afc_coeffs[0][index]; int factor2 = ff_adpcm_afc_coeffs[1][index]; /* Decode 16 samples. */ for (n = 0; n < 16; 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 = ((prev1 * factor1 + prev2 * factor2) + ((sampledat * scale) << 11)) >> 11; *samples = av_clip_int16(sampledat); prev2 = prev1; prev1 = *samples++; } } c->status[channel].sample1 = prev1; c->status[channel].sample2 = prev2; } } bytestream2_seek(&gb, 0, SEEK_END); break; } case AV_CODEC_ID_ADPCM_THP: { int table[6][16]; int ch; for (i = 0; i < avctx->channels; 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 < avctx->channels; i++) { c->status[i].sample1 = sign_extend(bytestream2_get_be16u(&gb), 16); c->status[i].sample2 = sign_extend(bytestream2_get_be16u(&gb), 16); } for (ch = 0; ch < avctx->channels; ch++) { samples = samples_p[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 = ((c->status[ch].sample1 * factor1 + c->status[ch].sample2 * factor2) >> 11) + (sampledat << exp); *samples = av_clip_int16(sampledat); c->status[ch].sample2 = c->status[ch].sample1; c->status[ch].sample1 = *samples++; } } } break; } default: return -1; } if (avpkt->size && bytestream2_tell(&gb) == 0) { av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n"); return AVERROR_INVALIDDATA; } *got_frame_ptr = 1; *(AVFrame *)data = c->frame; return bytestream2_tell(&gb); }