audiolfinger: implement latency mode control in spatializer mixer
Add audio HAL stream latency mode control logic to
Spatialier mixer thread:
- Query supported latency modes from HAL stream and register mode
change callback: when mode changes either from callback or routing
change, notify Spatializer effect client via IAudioFlingerClient
interface.
- Compute requested latency mode based on the requested mode and
active spatialized tracks and request it from HAL stream.
Bug: 218273231
Test: make
Change-Id: Ifc4445e1ce554631dbcffaf478fbe8a33ec1b5ab
diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h
index b2962ed8..a401048 100644
--- a/services/audioflinger/Threads.h
+++ b/services/audioflinger/Threads.h
@@ -55,7 +55,8 @@
CFG_EVENT_RELEASE_AUDIO_PATCH,
CFG_EVENT_UPDATE_OUT_DEVICE,
CFG_EVENT_RESIZE_BUFFER,
- CFG_EVENT_CHECK_OUTPUT_STAGE_EFFECTS
+ CFG_EVENT_CHECK_OUTPUT_STAGE_EFFECTS,
+ CFG_EVENT_HAL_LATENCY_MODES_CHANGED,
};
class ConfigEventData: public RefBase {
@@ -282,6 +283,15 @@
virtual ~CheckOutputStageEffectsEvent() {}
};
+ class HalLatencyModesChangedEvent : public ConfigEvent {
+ public:
+ HalLatencyModesChangedEvent() :
+ ConfigEvent(CFG_EVENT_HAL_LATENCY_MODES_CHANGED) {
+ }
+
+ virtual ~HalLatencyModesChangedEvent() {}
+ };
+
class PMDeathRecipient : public IBinder::DeathRecipient {
public:
@@ -353,6 +363,7 @@
void sendResizeBufferConfigEvent_l(int32_t maxSharedAudioHistoryMs);
void sendCheckOutputStageEffectsEvent();
void sendCheckOutputStageEffectsEvent_l();
+ void sendHalLatencyModesChangedEvent_l();
void processConfigEvents_l();
virtual void setCheckOutputStageEffects() {}
@@ -364,7 +375,7 @@
virtual void toAudioPortConfig(struct audio_port_config *config) = 0;
virtual void resizeInputBuffer_l(int32_t maxSharedAudioHistoryMs);
-
+ virtual void onHalLatencyModesChanged_l() {}
// see note at declaration of mStandby, mOutDevice and mInDevice
@@ -921,6 +932,8 @@
}
virtual void checkOutputStageEffects() {}
+ virtual void setHalLatencyMode_l() {}
+
void dumpInternals_l(int fd, const Vector<String16>& args) override;
void dumpTracks_l(int fd, const Vector<String16>& args) override;
@@ -1064,6 +1077,15 @@
bool hasMixer() const {
return mType == MIXER || mType == DUPLICATING || mType == SPATIALIZER;
}
+
+ virtual status_t setRequestedLatencyMode(
+ audio_latency_mode_t mode __unused) { return INVALID_OPERATION; }
+
+ virtual status_t getSupportedLatencyModes(
+ std::vector<audio_latency_mode_t>* modes __unused) {
+ return INVALID_OPERATION;
+ }
+
protected:
// updated by readOutputParameters_l()
size_t mNormalFrameCount; // normal mixer and effects
@@ -1682,7 +1704,8 @@
}
};
-class SpatializerThread : public MixerThread {
+class SpatializerThread : public MixerThread,
+ public StreamOutHalInterfaceLatencyModeCallback {
public:
SpatializerThread(const sp<AudioFlinger>& audioFlinger,
AudioStreamOut* output,
@@ -1693,10 +1716,35 @@
bool hasFastMixer() const override { return false; }
+ status_t createAudioPatch_l(const struct audio_patch *patch,
+ audio_patch_handle_t *handle) override;
+
+ // RefBase
+ virtual void onFirstRef();
+
+ // StreamOutHalInterfaceLatencyModeCallback
+ void onRecommendedLatencyModeChanged(std::vector<audio_latency_mode_t> modes) override;
+
+ status_t setRequestedLatencyMode(audio_latency_mode_t mode) override;
+ status_t getSupportedLatencyModes(std::vector<audio_latency_mode_t>* modes) override;
+
protected:
void checkOutputStageEffects() override;
+ void onHalLatencyModesChanged_l() override;
+ void setHalLatencyMode_l() override;
private:
+ void updateHalSupportedLatencyModes_l();
+
+ // Support low latency mode by default as unless explicitly indicated by the audio HAL
+ // we assume the audio path is compatible with the head tracking latency requirements
+ std::vector<audio_latency_mode_t> mSupportedLatencyModes = {AUDIO_LATENCY_MODE_LOW};
+ // default to invalid value to force first update to the audio HAL
+ audio_latency_mode_t mSetLatencyMode =
+ (audio_latency_mode_t)AUDIO_LATENCY_MODE_INVALID;
+ // Do not request a specific mode by default
+ audio_latency_mode_t mRequestedLatencyMode = AUDIO_LATENCY_MODE_FREE;
+
sp<EffectHandle> mFinalDownMixer;
};