static int svag_read_header(AVFormatContext *s) { unsigned size, align; AVStream *st; avio_skip(s->pb, 4); st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); size = avio_rl32(s->pb); st->codec->codec_type = AVMEDIA_TYPE_AUDIO; st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX; st->codec->sample_rate = avio_rl32(s->pb); if (st->codec->sample_rate <= 0) return AVERROR_INVALIDDATA; st->codec->channels = avio_rl32(s->pb); if (st->codec->channels <= 0) return AVERROR_INVALIDDATA; st->duration = size / (16 * st->codec->channels) * 28; align = avio_rl32(s->pb); if (align <= 0 || align > INT_MAX / st->codec->channels) return AVERROR_INVALIDDATA; st->codec->block_align = align * st->codec->channels; avio_skip(s->pb, 0x800 - avio_tell(s->pb)); avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); return 0; }