Spatializer: control audio HAL latency mode
Add support of HAL stream latency mode control to Spatializer
effect controller.
- Query supported latency modes when attached to a new output stream
and register a callback to be notified of changes
- Only use a head tracker sensor if the HAL stream supports low
latency or does not support latency mode control.
- Set the requested latency mode according to head tracking state.
Bug: 218273231
Test: make
Change-Id: Ia78156d1e190bb49a67988567df066c1ab90f9bd
diff --git a/services/audiopolicy/service/Spatializer.h b/services/audiopolicy/service/Spatializer.h
index 29f4b08..0921a90 100644
--- a/services/audiopolicy/service/Spatializer.h
+++ b/services/audiopolicy/service/Spatializer.h
@@ -85,7 +85,8 @@
*/
class Spatializer : public media::BnSpatializer,
public IBinder::DeathRecipient,
- private SpatializerPoseController::Listener {
+ private SpatializerPoseController::Listener,
+ public virtual AudioSystem::SupportedLatencyModesCallback {
public:
static sp<Spatializer> create(SpatializerPolicyCallback *callback);
@@ -122,6 +123,10 @@
/** IBinder::DeathRecipient. Listen to the death of the INativeSpatializerCallback. */
virtual void binderDied(const wp<IBinder>& who);
+ /** SupportedLatencyModesCallback */
+ void onSupportedLatencyModesChanged(
+ audio_io_handle_t output, const std::vector<audio_latency_mode_t>& modes) override;
+
/** Registers a INativeSpatializerCallback when a client is attached to this Spatializer
* by audio policy service.
*/
@@ -354,6 +359,7 @@
sp<EngineCallbackHandler> mHandler;
size_t mNumActiveTracks GUARDED_BY(mLock) = 0;
+ std::vector<audio_latency_mode_t> mSupportedLatencyModes GUARDED_BY(mLock);
static const std::vector<const char *> sHeadPoseKeys;
};