+static const AVOption options[] = {
+ { "sample_rate", "", offsetof(AlsaData, sample_rate), AV_OPT_TYPE_INT, {.dbl = 48000}, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
+ { "channels", "", offsetof(AlsaData, channels), AV_OPT_TYPE_INT, {.dbl = 2}, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
+ { NULL },
+};
+
+static const AVClass alsa_demuxer_class = {
+ .class_name = "ALSA demuxer",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_alsa_demuxer = {
+ .name = "alsa",
+ .long_name = NULL_IF_CONFIG_SMALL("ALSA audio input"),
+ .priv_data_size = sizeof(AlsaData),
+ .read_header = audio_read_header,
+ .read_packet = audio_read_packet,
+ .read_close = ff_alsa_close,
+ .flags = AVFMT_NOFILE,
+ .priv_class = &alsa_demuxer_class,