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options for sample rate syncing and device hogging

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This commit is contained in:
Yue Wang
2016-09-18 19:12:45 -07:00
committed by GitHub
parent 2bf2bd8932
commit e4b9d679fb
1 changed files with 9 additions and 3 deletions
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12
src/output/plugins/OSXOutputPlugin.cxx
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@@ -41,6 +41,8 @@ struct OSXOutput {
/* only applicable with kAudioUnitSubType_HALOutput */
const char *device_name;
const char *channel_map;
bool hog_device;
bool sync_sample_rate;
AudioDeviceID dev_id;
AudioComponentInstance au;
@@ -101,6 +103,8 @@ osx_output_configure(OSXOutput *oo, const ConfigBlock &block)
}
oo->channel_map = block.GetBlockValue("channel_map");
oo->hog_device = block.GetBlockValue("hog_device", false);
oo->sync_sample_rate = block.GetBlockValue("sync_sample_rate", false);
}
static AudioOutput *
@@ -631,7 +635,7 @@ osx_output_enable(AudioOutput *ao, Error &error)
return false;
}
if (oo->component_subtype == kAudioUnitSubType_HALOutput) {
if (oo->hog_device) {
osx_output_hog_device(oo->dev_id, true);
}
@@ -661,7 +665,7 @@ osx_output_disable(AudioOutput *ao)
AudioComponentInstanceDispose(oo->au);
if (oo->component_subtype == kAudioUnitSubType_HALOutput) {
if (oo->hog_device) {
osx_output_hog_device(oo->dev_id, false);
}
}
@@ -717,7 +721,9 @@ osx_output_open(AudioOutput *ao, AudioFormat &audio_format,
od->asbd.mBytesPerFrame = od->asbd.mBytesPerPacket;
od->asbd.mChannelsPerFrame = audio_format.channels;
osx_output_sync_device_sample_rate(od->dev_id, od->asbd);
if (od->sync_sample_rate) {
osx_output_sync_device_sample_rate(od->dev_id, od->asbd);
}
OSStatus status =
AudioUnitSetProperty(od->au, kAudioUnitProperty_StreamFormat,