static inline int wv_unpack_mono(WavpackFrameContext *s, GetBitContext *gb, void *dst, const int type) { int i, j, count = 0; int last, t; int A, S, T; int pos = s->pos; uint32_t crc = s->sc.crc; uint32_t crc_extra_bits = s->extra_sc.crc; int16_t *dst16 = dst; int32_t *dst32 = dst; float *dstfl = dst; const int channel_stride = s->avctx->channels; if(s->samples_left == s->samples) s->one = s->zero = s->zeroes = 0; do{ T = wv_get_value(s, gb, 0, &last); S = 0; if(last) break; for(i = 0; i < s->terms; i++){ t = s->decorr[i].value; if(t > 8){ if(t & 1) A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]; else A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1; s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0]; j = 0; }else{ A = s->decorr[i].samplesA[pos]; j = (pos + t) & 7; } if(type != AV_SAMPLE_FMT_S16) S = T + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10); else S = T + ((s->decorr[i].weightA * A + 512) >> 10); if(A && T) s->decorr[i].weightA -= ((((T ^ A) >> 30) & 2) - 1) * s->decorr[i].delta; s->decorr[i].samplesA[j] = T = S; } pos = (pos + 1) & 7; crc = crc * 3 + S; if(type == AV_SAMPLE_FMT_FLT){ *dstfl = wv_get_value_float(s, &crc_extra_bits, S); dstfl += channel_stride; }else if(type == AV_SAMPLE_FMT_S32){ *dst32 = wv_get_value_integer(s, &crc_extra_bits, S); dst32 += channel_stride; }else{ *dst16 = wv_get_value_integer(s, &crc_extra_bits, S); dst16 += channel_stride; } count++; }while(!last && count < s->max_samples); s->samples_left -= count; if(!s->samples_left){ wv_reset_saved_context(s); if(crc != s->CRC){ av_log(s->avctx, AV_LOG_ERROR, "CRC error\n"); return -1; } if(s->got_extra_bits && crc_extra_bits != s->crc_extra_bits){ av_log(s->avctx, AV_LOG_ERROR, "Extra bits CRC error\n"); return -1; } }else{ s->pos = pos; s->sc.crc = crc; s->sc.bits_used = get_bits_count(&s->gb); if(s->got_extra_bits){ s->extra_sc.crc = crc_extra_bits; s->extra_sc.bits_used = get_bits_count(&s->gb_extra_bits); } } return count; }