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LibAudio: Add a test for creating and destructing a PlaybackStream

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This will ensure that we don't leak any memory while playing back
audio.

There is an expectation value in the test that is only set to true when
PulseAudio is present for the moment. When any new implementation is
added for other libraries/platforms, we should hopefully get a CI
failure due to unexpected success in creating the `PlaybackStream`.

To ensure that we clean up our PulseAudio connection whenever audio
output is not needed, add `PulseAudioContext::weak_instance()` to allow
us to check whether an instance exists without creating one.
This commit is contained in:
Zaggy1024 2023-08-06 01:59:47 -05:00 • committed by Andrew Kaster
parent 515b255fa4
commit 50c73d02f0
5 changed files with 58 additions and 1 deletions
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8
Userland/Libraries/LibAudio/PulseAudioWrappers.cpp
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@ -11,10 +11,15 @@
namespace Audio {
ErrorOr<NonnullRefPtr<PulseAudioContext>> PulseAudioContext::instance()
WeakPtr<PulseAudioContext> PulseAudioContext::weak_instance()
{
// Use a weak pointer to allow the context to be shut down if we stop outputting audio.
static WeakPtr<PulseAudioContext> the_instance;
return the_instance;
}
ErrorOr<NonnullRefPtr<PulseAudioContext>> PulseAudioContext::instance()
{
static Threading::Mutex instantiation_mutex;
// Lock and unlock the mutex to ensure that the mutex is fully unlocked at application
// exit.
@ -25,6 +30,7 @@ ErrorOr<NonnullRefPtr<PulseAudioContext>> PulseAudioContext::instance()
auto instantiation_locker = Threading::MutexLocker(instantiation_mutex);
auto the_instance = weak_instance();
RefPtr<PulseAudioContext> strong_instance_pointer = the_instance.strong_ref();
if (strong_instance_pointer == nullptr) {