commit e8d9947be259ebc93b032e26fedda343cb95bf0e
author Vlad Popa <pvlad@google.com> Thu Jun 30 16:02:48 2022 +0200
committer Vlad Popa <pvlad@google.com> Fri Jul 29 11:34:41 2022 +0200
tree 16b84ebcd1f7a2421bff92c1bdfb190f9d4d01aa
parent b9b1db7d6303555f1f6eef7a31082198a9bddd0b

Send playback mute events from audio server

The events are sent by the AudioFlinger which communicates directly
through oneway ipc methods with the AudioService. The mute reasons are
described with a PersistableBundle to keep the interface generic for future
extensions.

Test: dumpsys audio
Bug: 235521198
Change-Id: I82cf7100a80e3fc71b629739ce5a5701ab3afc84

services/audioflinger/AudioFlinger.cpp

diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 7a9027c..a68f63e 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -54,7 +54,7 @@
 #include <cutils/properties.h>
 
 #include <system/audio.h>
-#include <audiomanager/AudioManager.h>
+#include <audiomanager/IAudioManager.h>
 
 #include "AudioFlinger.h"
 #include "NBAIO_Tee.h"
@@ -114,11 +114,12 @@
 using media::audio::common::AudioMMapPolicyType;
 using android::content::AttributionSourceState;
 
-static const char kDeadlockedString[] = "AudioFlinger may be deadlocked\n";
-static const char kHardwareLockedString[] = "Hardware lock is taken\n";
-static const char kClientLockedString[] = "Client lock is taken\n";
-static const char kNoEffectsFactory[] = "Effects Factory is absent\n";
+static constexpr char kDeadlockedString[] = "AudioFlinger may be deadlocked\n";
+static constexpr char kHardwareLockedString[] = "Hardware lock is taken\n";
+static constexpr char kClientLockedString[] = "Client lock is taken\n";
+static constexpr char kNoEffectsFactory[] = "Effects Factory is absent\n";
 
+static constexpr char kAudioServiceName[] = "audio";
 
 nsecs_t AudioFlinger::mStandbyTimeInNsecs = kDefaultStandbyTimeInNsecs;
 
@@ -2722,9 +2723,28 @@
         ThreadBase *thread = (ThreadBase *)mMmapThreads.valueAt(i).get();
         thread->systemReady();
     }
+
+    // Java services are ready, so we can create a reference to AudioService
+    getOrCreateAudioManager();
+
     return NO_ERROR;
 }
 
+sp<IAudioManager> AudioFlinger::getOrCreateAudioManager()
+{
+    if (mAudioManager.load() == nullptr) {
+        // use checkService() to avoid blocking
+        sp<IBinder> binder =
+            defaultServiceManager()->checkService(String16(kAudioServiceName));
+        if (binder != nullptr) {
+            mAudioManager = interface_cast<IAudioManager>(binder);
+        } else {
+            ALOGE("%s(): binding to audio service failed.", __func__);
+        }
+    }
+    return mAudioManager.load();
+}
+
 status_t AudioFlinger::getMicrophones(std::vector<media::MicrophoneInfo> *microphones)
 {
     AutoMutex lock(mHardwareLock);