Add type used for describing the mute state

This is used by the playback notification API to inform about a
mute/unmute event and also describe the reason for mute (stream, master,
playback restricted by apops mute)

Test: dumpsys audio
Bug: 235521198
Change-Id: I22e57e78e75a276dcb60e2820ec2cf26734b93c1

3 files changed, 50 insertions, 0 deletions

diff --git a/include/audiomanager/AudioManager.h b/include/audiomanager/AudioManager.h
index caf13a0f4b..86e5e352a6 100644
--- a/include/audiomanager/AudioManager.h
+++ b/include/audiomanager/AudioManager.h
@@ -39,8 +39,43 @@ typedef enum {
     PLAYER_STATE_STOPPED  = 4,
     PLAYER_UPDATE_DEVICE_ID = 5,
     PLAYER_UPDATE_PORT_ID = 6,
+    PLAYER_UPDATE_MUTED = 7,
 } player_state_t;
 
+static constexpr char
+    kExtraPlayerEventMuteKey[] = "android.media.extra.PLAYER_EVENT_MUTE";
+enum {
+    PLAYER_MUTE_MASTER = (1 << 0),
+    PLAYER_MUTE_STREAM_VOLUME = (1 << 1),
+    PLAYER_MUTE_STREAM_MUTED = (1 << 2),
+    PLAYER_MUTE_PLAYBACK_RESTRICTED = (1 << 3),
+};
+
+struct mute_state_t {
+    /** Flag used when the master volume is causing the mute state. */
+    bool muteFromMasterMute = false;
+    /** Flag used when the stream volume is causing the mute state. */
+    bool muteFromStreamVolume = false;
+    /** Flag used when the stream muted is causing the mute state. */
+    bool muteFromStreamMuted = false;
+    /** Flag used when playback is restricted by AppOps manager with OP_PLAY_AUDIO. */
+    bool muteFromPlaybackRestricted = false;
+
+    explicit operator int() const
+    {
+        int result = muteFromMasterMute * PLAYER_MUTE_MASTER;
+        result |= muteFromStreamVolume * PLAYER_MUTE_STREAM_VOLUME;
+        result |= muteFromStreamMuted * PLAYER_MUTE_STREAM_MUTED;
+        result |= muteFromPlaybackRestricted * PLAYER_MUTE_PLAYBACK_RESTRICTED;
+        return result;
+    }
+
+    bool operator==(const mute_state_t& other) const
+    {
+        return static_cast<int>(*this) == static_cast<int>(other);
+    }
+};
+
 // must be kept in sync with definitions in AudioManager.java
 #define RECORD_RIID_INVALID -1
 
diff --git a/include/audiomanager/IAudioManager.h b/include/audiomanager/IAudioManager.h
index 3d531feeac..769670ea99 100644
--- a/include/audiomanager/IAudioManager.h
+++ b/include/audiomanager/IAudioManager.h
@@ -20,6 +20,7 @@
 #include <audiomanager/AudioManager.h>
 #include <utils/Errors.h>
 #include <binder/IInterface.h>
+#include <binder/PersistableBundle.h>
 #include <hardware/power.h>
 #include <system/audio.h>
 
@@ -41,6 +42,7 @@ public:
         RECORDER_EVENT                        = IBinder::FIRST_CALL_TRANSACTION + 5,
         RELEASE_RECORDER                      = IBinder::FIRST_CALL_TRANSACTION + 6,
         PLAYER_SESSION_ID                     = IBinder::FIRST_CALL_TRANSACTION + 7,
+        PORT_EVENT                            = IBinder::FIRST_CALL_TRANSACTION + 8,
     };
 
     DECLARE_META_INTERFACE(AudioManager)
@@ -59,6 +61,8 @@ public:
     /*oneway*/ virtual status_t recorderEvent(audio_unique_id_t riid, recorder_state_t event) = 0;
     /*oneway*/ virtual status_t releaseRecorder(audio_unique_id_t riid) = 0;
     /*oneway*/ virtual status_t playerSessionId(audio_unique_id_t piid, audio_session_t sessionId) = 0;
+    /*oneway*/ virtual status_t portEvent(audio_port_handle_t portId, player_state_t event,
+                const std::unique_ptr<os::PersistableBundle>& extras) = 0;
 };
 
 // ----------------------------------------------------------------------------
diff --git a/services/audiomanager/IAudioManager.cpp b/services/audiomanager/IAudioManager.cpp
index 700074acd2..3ef5049230 100644
--- a/services/audiomanager/IAudioManager.cpp
+++ b/services/audiomanager/IAudioManager.cpp
@@ -141,6 +141,17 @@ public:
         data.writeInt32((int32_t) sessionId);
         return remote()->transact(PLAYER_SESSION_ID, data, &reply, IBinder::FLAG_ONEWAY);
     }
+
+    virtual status_t portEvent(audio_port_handle_t portId, player_state_t event,
+            const std::unique_ptr<os::PersistableBundle>& extras) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IAudioManager::getInterfaceDescriptor());
+        data.writeInt32((int32_t) portId);
+        data.writeInt32((int32_t) event);
+        // TODO: replace PersistableBundle with own struct
+        data.writeNullableParcelable(extras);
+        return remote()->transact(PORT_EVENT, data, &reply, IBinder::FLAG_ONEWAY);
+    }
 };
 
 IMPLEMENT_META_INTERFACE(AudioManager, "android.media.IAudioService");