static int msf_read_header(AVFormatContext *s) { unsigned codec, align, size; AVStream *st; avio_skip(s->pb, 4); st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); st->codec->codec_type = AVMEDIA_TYPE_AUDIO; codec = avio_rb32(s->pb); st->codec->channels = avio_rb32(s->pb); if (st->codec->channels <= 0) return AVERROR_INVALIDDATA; size = avio_rb32(s->pb); st->codec->sample_rate = avio_rb32(s->pb); if (st->codec->sample_rate <= 0) return AVERROR_INVALIDDATA; align = avio_rb32(s->pb) ; if (align > INT_MAX / st->codec->channels) return AVERROR_INVALIDDATA; st->codec->block_align = align; switch (codec) { case 0: st->codec->codec_id = AV_CODEC_ID_PCM_S16BE; break; case 3: st->codec->block_align = 16 * st->codec->channels; st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX; break; case 7: st->need_parsing = AVSTREAM_PARSE_FULL_RAW; st->codec->codec_id = AV_CODEC_ID_MP3; break; default: avpriv_request_sample(s, "Codec %d", codec); return AVERROR_PATCHWELCOME; } st->duration = av_get_audio_frame_duration(st->codec, size); avio_skip(s->pb, 0x40 - avio_tell(s->pb)); avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); return 0; }