static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap) { int64_t size; AVIOContext *pb = s->pb; WAVContext *wav = s->priv_data; AVStream *st; uint8_t guid[16]; avio_read(pb, guid, 16); if (memcmp(guid, guid_riff, 16)) return -1; if (avio_rl64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */ return -1; avio_read(pb, guid, 16); if (memcmp(guid, guid_wave, 16)) { av_log(s, AV_LOG_ERROR, "could not find wave guid\n"); return -1; } size = find_guid(pb, guid_fmt); if (size < 0) { av_log(s, AV_LOG_ERROR, "could not find fmt guid\n"); return -1; } st = av_new_stream(s, 0); if (!st) return AVERROR(ENOMEM); /* subtract chunk header size - normal wav file doesn't count it */ ff_get_wav_header(pb, st->codec, size - 24); avio_skip(pb, FFALIGN(size, INT64_C(8)) - size); st->need_parsing = AVSTREAM_PARSE_FULL; av_set_pts_info(st, 64, 1, st->codec->sample_rate); size = find_guid(pb, guid_data); if (size < 0) { av_log(s, AV_LOG_ERROR, "could not find data guid\n"); return -1; } wav->data_end = avio_tell(pb) + size - 24; wav->w64 = 1; return 0; }