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wasapi2: Use AUDCLNT_STREAMFLAGS_NOPERSIST flag

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... so that we can disable persistence of our mute/volume status

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2306>
This commit is contained in:
Seungha Yang 2021-06-06 17:32:59 +09:00
parent d5384ffbd0
commit 4b42671c99
1 changed files with 4 additions and 9 deletions
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13
sys/wasapi2/gstwasapi2client.cpp
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@ -1210,6 +1210,8 @@ gst_wasapi2_client_initialize_audio_client3 (GstWasapi2Client * self)
{
HRESULT hr = S_OK;
UINT32 default_period, fundamental_period, min_period, max_period;
/* AUDCLNT_STREAMFLAGS_NOPERSIST is not allowed for
* InitializeSharedAudioStream */
DWORD stream_flags = AUDCLNT_STREAMFLAGS_EVENTCALLBACK;
WAVEFORMATEX *format = NULL;
UINT32 period;
@ -1282,7 +1284,8 @@ gst_wasapi2_client_initialize_audio_client (GstWasapi2Client * self,
REFERENCE_TIME default_period, min_period;
REFERENCE_TIME device_period, device_buffer_duration;
guint rate;
DWORD stream_flags = AUDCLNT_STREAMFLAGS_EVENTCALLBACK;
DWORD stream_flags =
AUDCLNT_STREAMFLAGS_EVENTCALLBACK | AUDCLNT_STREAMFLAGS_NOPERSIST;
HRESULT hr;
IAudioClient3 *audio_client = self->audio_client;
@ -1440,14 +1443,6 @@ gst_wasapi2_client_open (GstWasapi2Client * client,
return hr;
client->audio_volume = audio_volume.Detach ();
/* this mute state seems to be global setting for this device
* but below documentation looks unclear why mute state is preserved
* even after process is terminated
* https://docs.microsoft.com/en-us/windows/win32/api/audioclient/nf-audioclient-isimpleaudiovolume-setmute
* Explicitly disable mute so that ensure we can produce or play audio
* regardless of previous status
*/
client->audio_volume->SetMute (FALSE, nullptr);
gst_audio_ring_buffer_set_channel_positions (buf, client->positions);