>From cf822ea7fc1885d0a47f24928359ee05fdbf76a0 Mon Sep 17 00:00:00 2001
From: Evgeny <k...@obninsk.ru>
Date: Fri, 16 Nov 2018 15:54:44 +0300
Subject: [PATCH 5/6] Alsa: pause/resume control
---
libavdevice/alsa_enc.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/libavdevice/alsa_enc.c b/libavdevice/alsa_enc.c
index 0bef625..df14c85 100644
--- a/libavdevice/alsa_enc.c
+++ b/libavdevice/alsa_enc.c
@@ -134,6 +134,38 @@ static int audio_write_frame(AVFormatContext *s1, int stream_index,
return audio_write_packet(s1, &pkt);
}
+static int alsa_control_message(AVFormatContext *h, int type,
+ void *data, size_t data_size)
+{
+ AlsaData *s = h->priv_data;
+ snd_pcm_t *handle = s->h;
+ int ret = -ENOSYS;
+
+ switch(type) {
+ case AV_APP_TO_DEV_PAUSE:
+ return snd_pcm_pause(handle, 1);
+ case AV_APP_TO_DEV_PLAY:
+ return snd_pcm_pause(handle, 0);
+ case AV_APP_TO_DEV_TOGGLE_PAUSE:
+ return ret;
+ case AV_APP_TO_DEV_MUTE:
+ return ret;
+ case AV_APP_TO_DEV_UNMUTE:
+ return ret;
+ case AV_APP_TO_DEV_TOGGLE_MUTE:
+ return ret;
+ case AV_APP_TO_DEV_SET_VOLUME:
+ return ret;
+ case AV_APP_TO_DEV_GET_VOLUME:
+ return ret;
+ case AV_APP_TO_DEV_GET_MUTE:
+ return ret;
+ default:
+ break;
+ }
+ return AVERROR(ENOSYS);
+}
+
static void
audio_get_output_timestamp(AVFormatContext *s1, int stream,
int64_t *dts, int64_t *wall)
@@ -169,6 +201,7 @@ AVOutputFormat ff_alsa_muxer = {
.write_uncoded_frame = audio_write_frame,
.get_device_list = audio_get_device_list,
.get_output_timestamp = audio_get_output_timestamp,
+ .control_message = alsa_control_message,
.flags = AVFMT_NOFILE,
.priv_class = &alsa_muxer_class,
};
--
2.1.4
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