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Add utility functions in PortaudioBackend for re/setting MMCSS thread characteristics

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This commit is contained in:
Tim Mayberry 2015-09-01 09:57:17 +10:00
parent 77ce989dfa
commit b288a40220
2 changed files with 38 additions and 0 deletions
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35
libs/backends/portaudio/portaudio_backend.cc
View File

@ -699,6 +699,41 @@ PortAudioBackend::name_to_id(std::string device_name) const {
return device_id;
}
bool
PortAudioBackend::set_mmcss_pro_audio (HANDLE* task_handle)
{
bool mmcss_success = mmcss::set_thread_characteristics ("Pro Audio", task_handle);
if (!mmcss_success) {
PBD::warning << get_error_string(SettingAudioThreadPriorityError) << endmsg;
return false;
} else {
DEBUG_THREADS("Thread characteristics set to Pro Audio\n");
}
bool mmcss_priority =
mmcss::set_thread_priority(*task_handle, mmcss::AVRT_PRIORITY_NORMAL);
if (!mmcss_priority) {
PBD::warning << get_error_string(SettingAudioThreadPriorityError) << endmsg;
return false;
} else {
DEBUG_THREADS("Thread priority set to AVRT_PRIORITY_NORMAL\n");
}
return true;
}
bool
PortAudioBackend::reset_mmcss (HANDLE task_handle)
{
if (!mmcss::revert_thread_characteristics(task_handle)) {
DEBUG_THREADS("Unable to reset process thread characteristics\n");
return false;
}
return true;
}
void *
PortAudioBackend::portaudio_process_thread (void *arg)
{

3
libs/backends/portaudio/portaudio_backend.h
View File

@ -334,6 +334,9 @@ class PortAudioBackend : public AudioBackend {
bool engine_halted ();
bool running ();
static bool set_mmcss_pro_audio (HANDLE* task_handle);
static bool reset_mmcss (HANDLE task_handle);
private:
std::string _instance_name;
PortAudioIO *_pcmio;