Spatializer: fix deadlock in onSupportedLatencyModesChanged
The Spatializer controller must not call AudioFlinger methods from
AudioFlinger callbacks to avoid risks of deadlock with AudioFlinger or
AudioFlinger threads mutexes.
Process the onSupportedLatencyModesChanged() callbakc in the handler
thread instead of synchronously
Bug: 239540985
Test: repro steps in bug
Change-Id: Ia7af5631f26a72adce6ef8dc762196ae58d3f695
diff --git a/services/audiopolicy/service/Spatializer.cpp b/services/audiopolicy/service/Spatializer.cpp
index f4263b0..9f0a901 100644
--- a/services/audiopolicy/service/Spatializer.cpp
+++ b/services/audiopolicy/service/Spatializer.cpp
@@ -84,6 +84,7 @@
kWhatOnFramesProcessed, // AudioEffect::EVENT_FRAMES_PROCESSED
kWhatOnHeadToStagePose, // SpatializerPoseController::Listener::onHeadToStagePose
kWhatOnActualModeChange, // SpatializerPoseController::Listener::onActualModeChange
+ kWhatOnLatencyModesChanged, // Spatializer::onSupportedLatencyModesChanged
};
static constexpr const char *kNumFramesKey = "numFrames";
static constexpr const char *kModeKey = "mode";
@@ -93,15 +94,27 @@
static constexpr const char *kRotation0Key = "rotation0";
static constexpr const char *kRotation1Key = "rotation1";
static constexpr const char *kRotation2Key = "rotation2";
+ static constexpr const char *kLatencyModesKey = "latencyModes";
+
+ class LatencyModes : public RefBase {
+ public:
+ LatencyModes(audio_io_handle_t output,
+ const std::vector<audio_latency_mode_t>& latencyModes)
+ : mOutput(output), mLatencyModes(latencyModes) {}
+ ~LatencyModes() = default;
+
+ audio_io_handle_t mOutput;
+ std::vector<audio_latency_mode_t> mLatencyModes;
+ };
void onMessageReceived(const sp<AMessage> &msg) override {
+ sp<Spatializer> spatializer = mSpatializer.promote();
+ if (spatializer == nullptr) {
+ ALOGW("%s: Cannot promote spatializer", __func__);
+ return;
+ }
switch (msg->what()) {
case kWhatOnFramesProcessed: {
- sp<Spatializer> spatializer = mSpatializer.promote();
- if (spatializer == nullptr) {
- ALOGW("%s: Cannot promote spatializer", __func__);
- return;
- }
int numFrames;
if (!msg->findInt32(kNumFramesKey, &numFrames)) {
ALOGE("%s: Cannot find num frames!", __func__);
@@ -112,11 +125,6 @@
}
} break;
case kWhatOnHeadToStagePose: {
- sp<Spatializer> spatializer = mSpatializer.promote();
- if (spatializer == nullptr) {
- ALOGW("%s: Cannot promote spatializer", __func__);
- return;
- }
std::vector<float> headToStage(sHeadPoseKeys.size());
for (size_t i = 0 ; i < sHeadPoseKeys.size(); i++) {
if (!msg->findFloat(sHeadPoseKeys[i], &headToStage[i])) {
@@ -127,18 +135,25 @@
spatializer->onHeadToStagePoseMsg(headToStage);
} break;
case kWhatOnActualModeChange: {
- sp<Spatializer> spatializer = mSpatializer.promote();
- if (spatializer == nullptr) {
- ALOGW("%s: Cannot promote spatializer", __func__);
- return;
- }
int mode;
- if (!msg->findInt32(EngineCallbackHandler::kModeKey, &mode)) {
+ if (!msg->findInt32(kModeKey, &mode)) {
ALOGE("%s: Cannot find actualMode!", __func__);
return;
}
spatializer->onActualModeChangeMsg(static_cast<HeadTrackingMode>(mode));
} break;
+
+ case kWhatOnLatencyModesChanged: {
+ sp<RefBase> object;
+ if (!msg->findObject(kLatencyModesKey, &object)) {
+ ALOGE("%s: Cannot find latency modes!", __func__);
+ return;
+ }
+ sp<LatencyModes> latencyModes = static_cast<LatencyModes*>(object.get());
+ spatializer->onSupportedLatencyModesChangedMsg(
+ latencyModes->mOutput, std::move(latencyModes->mLatencyModes));
+ } break;
+
default:
LOG_ALWAYS_FATAL("Invalid callback message %d", msg->what());
}
@@ -783,9 +798,21 @@
void Spatializer::onSupportedLatencyModesChanged(
audio_io_handle_t output, const std::vector<audio_latency_mode_t>& modes) {
+ ALOGV("%s output %d num modes %zu", __func__, (int)output, modes.size());
+ sp<AMessage> msg =
+ new AMessage(EngineCallbackHandler::kWhatOnLatencyModesChanged, mHandler);
+ msg->setObject(EngineCallbackHandler::kLatencyModesKey,
+ sp<EngineCallbackHandler::LatencyModes>::make(output, modes));
+ msg->post();
+}
+
+void Spatializer::onSupportedLatencyModesChangedMsg(
+ audio_io_handle_t output, std::vector<audio_latency_mode_t>&& modes) {
std::lock_guard lock(mLock);
+ ALOGV("%s output %d mOutput %d num modes %zu",
+ __func__, (int)output, (int)mOutput, modes.size());
if (output == mOutput) {
- mSupportedLatencyModes = modes;
+ mSupportedLatencyModes = std::move(modes);
checkSensorsState_l();
}
}
diff --git a/services/audiopolicy/service/Spatializer.h b/services/audiopolicy/service/Spatializer.h
index 0921a90..a7d9f32 100644
--- a/services/audiopolicy/service/Spatializer.h
+++ b/services/audiopolicy/service/Spatializer.h
@@ -167,6 +167,8 @@
void onHeadToStagePoseMsg(const std::vector<float>& headToStage);
void onActualModeChangeMsg(media::HeadTrackingMode mode);
+ void onSupportedLatencyModesChangedMsg(
+ audio_io_handle_t output, std::vector<audio_latency_mode_t>&& modes);
static constexpr int kMaxEffectParamValues = 10;
/**