audio policy: add routing update client interface

Added IAudioPolicyServiceClient client binder interface
for client process to receive notifications from AudioPolicyService
when audio ports are added/removed or audio patches created/released.

The audio patches owned by a given client are automatically released when
this client binder dies.

Bug: 14815883.

Change-Id: I6013f6aec03b50565cffb1ad2cd1f0f8852032c5

1 files changed, 56 insertions, 0 deletions

diff --git a/include/media/IAudioPolicyServiceClient.h b/include/media/IAudioPolicyServiceClient.h
new file mode 100644
index 0000000..59df046
--- /dev/null
+++ b/include/media/IAudioPolicyServiceClient.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_IAUDIOPOLICYSERVICECLIENT_H
+#define ANDROID_IAUDIOPOLICYSERVICECLIENT_H
+
+
+#include <utils/RefBase.h>
+#include <binder/IInterface.h>
+#include <system/audio.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+class IAudioPolicyServiceClient : public IInterface
+{
+public:
+    DECLARE_META_INTERFACE(AudioPolicyServiceClient);
+
+    // Notifies a change of audio port configuration.
+    virtual void onAudioPortListUpdate() = 0;
+    // Notifies a change of audio patch configuration.
+    virtual void onAudioPatchListUpdate() = 0;
+};
+
+
+// ----------------------------------------------------------------------------
+
+class BnAudioPolicyServiceClient : public BnInterface<IAudioPolicyServiceClient>
+{
+public:
+    virtual status_t    onTransact( uint32_t code,
+                                    const Parcel& data,
+                                    Parcel* reply,
+                                    uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_IAUDIOPOLICYSERVICECLIENT_H