static int genh_read_header(AVFormatContext *s) { unsigned start_offset, header_size, codec, coef_type, coef[2]; GENHDemuxContext *c = s->priv_data; av_unused unsigned coef_splitted[2]; int align, ch, ret; AVStream *st; avio_skip(s->pb, 4); st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; st->codecpar->channels = avio_rl32(s->pb); if (st->codecpar->channels <= 0) return AVERROR_INVALIDDATA; if (st->codecpar->channels == 1) st->codecpar->channel_layout = AV_CH_LAYOUT_MONO; else if (st->codecpar->channels == 2) st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO; align = c->interleave_size = avio_rl32(s->pb); if (align < 0 || align > INT_MAX / st->codecpar->channels) return AVERROR_INVALIDDATA; st->codecpar->block_align = align * st->codecpar->channels; st->codecpar->sample_rate = avio_rl32(s->pb); avio_skip(s->pb, 4); st->duration = avio_rl32(s->pb); codec = avio_rl32(s->pb); switch (codec) { case 0: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; break; case 1: case 11: st->codecpar->bits_per_coded_sample = 4; st->codecpar->block_align = 36 * st->codecpar->channels; st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_WAV; break; case 2: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_DTK; break; case 3: st->codecpar->codec_id = st->codecpar->block_align > 0 ? AV_CODEC_ID_PCM_S16BE_PLANAR : AV_CODEC_ID_PCM_S16BE; break; case 4: st->codecpar->codec_id = st->codecpar->block_align > 0 ? AV_CODEC_ID_PCM_S16LE_PLANAR : AV_CODEC_ID_PCM_S16LE; break; case 5: st->codecpar->codec_id = st->codecpar->block_align > 0 ? AV_CODEC_ID_PCM_S8_PLANAR : AV_CODEC_ID_PCM_S8; break; case 6: st->codecpar->codec_id = AV_CODEC_ID_SDX2_DPCM; break; case 7: ret = ff_alloc_extradata(st->codecpar, 2); if (ret < 0) return ret; AV_WL16(st->codecpar->extradata, 3); st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_WS; break; case 10: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_AICA; break; case 12: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_THP; break; case 13: st->codecpar->codec_id = AV_CODEC_ID_PCM_U8; break; case 17: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_QT; break; default: avpriv_request_sample(s, "codec %d", codec); return AVERROR_PATCHWELCOME; } start_offset = avio_rl32(s->pb); header_size = avio_rl32(s->pb); if (header_size > start_offset) return AVERROR_INVALIDDATA; if (header_size == 0) start_offset = 0x800; coef[0] = avio_rl32(s->pb); coef[1] = avio_rl32(s->pb); c->dsp_int_type = avio_rl32(s->pb); coef_type = avio_rl32(s->pb); coef_splitted[0] = avio_rl32(s->pb); coef_splitted[1] = avio_rl32(s->pb); if (st->codecpar->codec_id == AV_CODEC_ID_ADPCM_THP) { if (st->codecpar->channels > 2) { avpriv_request_sample(s, "channels %d>2", st->codecpar->channels); return AVERROR_PATCHWELCOME; } ff_alloc_extradata(st->codecpar, 32 * st->codecpar->channels); for (ch = 0; ch < st->codecpar->channels; ch++) { if (coef_type & 1) { avpriv_request_sample(s, "coef_type & 1"); return AVERROR_PATCHWELCOME; } else { avio_seek(s->pb, coef[ch], SEEK_SET); avio_read(s->pb, st->codecpar->extradata + 32 * ch, 32); } } if (c->dsp_int_type == 1) { st->codecpar->block_align = 8 * st->codecpar->channels; if (c->interleave_size != 1 && c->interleave_size != 2 && c->interleave_size != 4) return AVERROR_INVALIDDATA; } } avio_skip(s->pb, start_offset - avio_tell(s->pb)); avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); return 0; }