audio policy: optimize preferred device selection
Several optimizations to avoid redundant track invalidation
when a preferred device is specified for an AudioTrack.
1) in AudioTrack: only invalidate the track if the preferred device
differs from the actual device. If the track is not active,
immediately restore it instead of waiting for next start.
2) in AudioPolicyManager: avoid invalidating the track in startSource() and
stopSource() if another active client with the same preferred device
exists.
Also fix a problem in getOutput() preventing MediaPlayer to open a sink
for call assistant use case.
Bug: 272560885
Test: atest RoutingTest
Change-Id: Ia3fb06eaf2e292d2795d588226c7672b7ab6722f
diff --git a/media/libaudioclient/AudioTrack.cpp b/media/libaudioclient/AudioTrack.cpp
index 6ab8339..b899951 100644
--- a/media/libaudioclient/AudioTrack.cpp
+++ b/media/libaudioclient/AudioTrack.cpp
@@ -1789,13 +1789,21 @@
status_t AudioTrack::setOutputDevice(audio_port_handle_t deviceId) {
AutoMutex lock(mLock);
- ALOGV("%s(%d): deviceId=%d mSelectedDeviceId=%d",
- __func__, mPortId, deviceId, mSelectedDeviceId);
+ ALOGV("%s(%d): deviceId=%d mSelectedDeviceId=%d mRoutedDeviceId %d",
+ __func__, mPortId, deviceId, mSelectedDeviceId, mRoutedDeviceId);
if (mSelectedDeviceId != deviceId) {
mSelectedDeviceId = deviceId;
- if (mStatus == NO_ERROR) {
- android_atomic_or(CBLK_INVALID, &mCblk->mFlags);
- mProxy->interrupt();
+ if (mStatus == NO_ERROR && mSelectedDeviceId != mRoutedDeviceId) {
+ if (isPlaying_l()) {
+ android_atomic_or(CBLK_INVALID, &mCblk->mFlags);
+ mProxy->interrupt();
+ } else {
+ // if the track is idle, try to restore now and
+ // defer to next start if not possible
+ if (restoreTrack_l("setOutputDevice") != OK) {
+ android_atomic_or(CBLK_INVALID, &mCblk->mFlags);
+ }
+ }
}
}
return NO_ERROR;
diff --git a/media/libaudioclient/include/media/AudioTrack.h b/media/libaudioclient/include/media/AudioTrack.h
index 9f540e6..ee81ef8 100644
--- a/media/libaudioclient/include/media/AudioTrack.h
+++ b/media/libaudioclient/include/media/AudioTrack.h
@@ -1176,6 +1176,9 @@
bool isPlaying() {
AutoMutex lock(mLock);
+ return isPlaying_l();
+ }
+ bool isPlaying_l() {
return mState == STATE_ACTIVE || mState == STATE_STOPPING;
}
diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 8e19d02..e654bce 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -1836,7 +1836,6 @@
} else {
mAttributes = NULL;
}
-
setMinBufferCount();
}
@@ -2683,7 +2682,7 @@
// This is a benign busy-wait, with the next data request generated 10 ms or more later;
// nevertheless for power reasons, we don't want to see too many of these.
- ALOGV_IF(actualSize == 0 && buffer->size > 0, "callbackwrapper: empty buffer returned");
+ ALOGV_IF(actualSize == 0 && buffer.size() > 0, "callbackwrapper: empty buffer returned");
unlock();
return actualSize;
}
diff --git a/services/audiopolicy/common/managerdefinitions/include/AudioOutputDescriptor.h b/services/audiopolicy/common/managerdefinitions/include/AudioOutputDescriptor.h
index 75fa595..0e4bc6c 100644
--- a/services/audiopolicy/common/managerdefinitions/include/AudioOutputDescriptor.h
+++ b/services/audiopolicy/common/managerdefinitions/include/AudioOutputDescriptor.h
@@ -301,6 +301,10 @@
return mActiveClients;
}
+ // Returns 0 if not all active clients have the same exclusive preferred device
+ // or the number of active clients with the same exclusive preferred device
+ size_t sameExclusivePreferredDevicesCount() const;
+
bool useHwGain() const
{
return !devices().isEmpty() ? devices().itemAt(0)->hasGainController() : false;
diff --git a/services/audiopolicy/common/managerdefinitions/src/AudioOutputDescriptor.cpp b/services/audiopolicy/common/managerdefinitions/src/AudioOutputDescriptor.cpp
index 8eefe77..41fbebc 100644
--- a/services/audiopolicy/common/managerdefinitions/src/AudioOutputDescriptor.cpp
+++ b/services/audiopolicy/common/managerdefinitions/src/AudioOutputDescriptor.cpp
@@ -237,6 +237,27 @@
return clients;
}
+size_t AudioOutputDescriptor::sameExclusivePreferredDevicesCount() const
+{
+ audio_port_handle_t deviceId = AUDIO_PORT_HANDLE_NONE;
+ size_t count = 0;
+ for (const auto &client : getClientIterable()) {
+ if (client->active()) {
+ if (!(client->hasPreferredDevice() &&
+ client->isPreferredDeviceForExclusiveUse())) {
+ return 0;
+ }
+ if (deviceId == AUDIO_PORT_HANDLE_NONE) {
+ deviceId = client->preferredDeviceId();
+ } else if (deviceId != client->preferredDeviceId()) {
+ return 0;
+ }
+ count++;
+ }
+ }
+ return count;
+}
+
bool AudioOutputDescriptor::isAnyActive(VolumeSource volumeSourceToIgnore) const
{
return std::find_if(begin(mActiveClients), end(mActiveClients),
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 8d00a3d..f625fdb 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -2088,8 +2088,7 @@
outputDesc->setClientActive(client, true);
if (client->hasPreferredDevice(true)) {
- if (outputDesc->clientsList(true /*activeOnly*/).size() == 1 &&
- client->isPreferredDeviceForExclusiveUse()) {
+ if (outputDesc->sameExclusivePreferredDevicesCount() > 0) {
// Preferred device may be exclusive, use only if no other active clients on this output
devices = DeviceVector(
mAvailableOutputDevices.getDeviceFromId(client->preferredDeviceId()));
@@ -2293,7 +2292,8 @@
}
}
bool forceDeviceUpdate = false;
- if (client->hasPreferredDevice(true)) {
+ if (client->hasPreferredDevice(true) &&
+ outputDesc->sameExclusivePreferredDevicesCount() < 2) {
checkStrategyRoute(client->strategy(), AUDIO_IO_HANDLE_NONE);
forceDeviceUpdate = true;
}
diff --git a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
index 49224c5..04aeaba 100644
--- a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
@@ -301,7 +301,8 @@
audio_stream_type_t stream = VALUE_OR_RETURN_BINDER_STATUS(
aidl2legacy_AudioStreamType_audio_stream_type_t(streamAidl));
- if (uint32_t(stream) >= AUDIO_STREAM_PUBLIC_CNT) {
+ if (uint32_t(stream) >= AUDIO_STREAM_PUBLIC_CNT
+ && stream != AUDIO_STREAM_ASSISTANT && stream != AUDIO_STREAM_CALL_ASSISTANT) {
*_aidl_return = VALUE_OR_RETURN_BINDER_STATUS(
legacy2aidl_audio_io_handle_t_int32_t(AUDIO_IO_HANDLE_NONE));
return Status::ok();