+
+static void parse_waveformatex(AVIOContext *pb, AVCodecContext *c)
+{
+ ff_asf_guid subformat;
+ c->bits_per_coded_sample = avio_rl16(pb);
+ c->channel_layout = avio_rl32(pb); /* dwChannelMask */
+
+ ff_get_guid(pb, &subformat);
+ if (!memcmp(subformat + 4,
+ (const uint8_t[]){ FF_MEDIASUBTYPE_BASE_GUID }, 12)) {
+ c->codec_tag = AV_RL32(subformat);
+ c->codec_id = ff_wav_codec_get_id(c->codec_tag,
+ c->bits_per_coded_sample);
+ } else {
+ c->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subformat);
+ if (!c->codec_id)
+ av_log(c, AV_LOG_WARNING,
+ "unknown subformat:"FF_PRI_GUID"\n",
+ FF_ARG_GUID(subformat));
+ }
+}
+