Add a way for SystemUI to receive media resource (e.g. A/V codec) usage

Bug: 26175834
Change-Id: I16320fa41dd852768a370af0a0740691d1ddacdf
diff --git a/Android.mk b/Android.mk
index 41bf618..14be920 100644
--- a/Android.mk
+++ b/Android.mk
@@ -23,6 +23,7 @@
     IAppOpsService.cpp \
     IBatteryStats.cpp \
     IInterface.cpp \
+    IMediaResourceMonitor.cpp \
     IMemory.cpp \
     IPCThreadState.cpp \
     IPermissionController.cpp \
diff --git a/IMediaResourceMonitor.cpp b/IMediaResourceMonitor.cpp
new file mode 100644
index 0000000..e8deb4a
--- /dev/null
+++ b/IMediaResourceMonitor.cpp
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2016 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.
+ */
+
+#include <binder/IMediaResourceMonitor.h>
+#include <binder/Parcel.h>
+#include <utils/Errors.h>
+#include <sys/types.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------
+
+class BpMediaResourceMonitor : public BpInterface<IMediaResourceMonitor> {
+public:
+    BpMediaResourceMonitor(const sp<IBinder>& impl)
+        : BpInterface<IMediaResourceMonitor>(impl) {}
+
+    virtual void notifyResourceGranted(/*in*/ int32_t pid, /*in*/ const String16& type,
+            /*in*/ const String16& subType, /*in*/ int64_t value)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(IMediaResourceMonitor::getInterfaceDescriptor());
+        data.writeInt32(pid);
+        data.writeString16(type);
+        data.writeString16(subType);
+        data.writeInt64(value);
+        remote()->transact(NOTIFY_RESOURCE_GRANTED, data, &reply, IBinder::FLAG_ONEWAY);
+    }
+};
+
+IMPLEMENT_META_INTERFACE(MediaResourceMonitor, "android.media.IMediaResourceMonitor");
+
+// ----------------------------------------------------------------------
+
+status_t BnMediaResourceMonitor::onTransact( uint32_t code, const Parcel& data, Parcel* reply,
+        uint32_t flags) {
+    switch(code) {
+        case NOTIFY_RESOURCE_GRANTED: {
+            CHECK_INTERFACE(IMediaResourceMonitor, data, reply);
+            int32_t pid = data.readInt32();
+            const String16 type = data.readString16();
+            const String16 subType = data.readString16();
+            int64_t value = data.readInt64();
+            notifyResourceGranted(/*in*/ pid, /*in*/ type, /*in*/ subType, /*in*/ value);
+            return NO_ERROR;
+        } break;
+        default:
+            return BBinder::onTransact(code, data, reply, flags);
+    }
+}
+
+// ----------------------------------------------------------------------
+
+}; // namespace android
diff --git a/include/hwbinder/IMediaResourceMonitor.h b/include/hwbinder/IMediaResourceMonitor.h
new file mode 100644
index 0000000..b7b9c50
--- /dev/null
+++ b/include/hwbinder/IMediaResourceMonitor.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2016 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_I_MEDIA_RESOURCE_MONITOR_H
+#define ANDROID_I_MEDIA_RESOURCE_MONITOR_H
+
+#include <binder/IInterface.h>
+
+namespace android {
+
+// ----------------------------------------------------------------------
+
+class IMediaResourceMonitor : public IInterface {
+public:
+    DECLARE_META_INTERFACE(MediaResourceMonitor);
+
+    virtual void notifyResourceGranted(/*in*/ int32_t pid, /*in*/ const String16& type,
+            /*in*/ const String16& subType, /*in*/ int64_t value) = 0;
+
+    enum {
+        NOTIFY_RESOURCE_GRANTED = IBinder::FIRST_CALL_TRANSACTION,
+    };
+};
+
+// ----------------------------------------------------------------------
+
+class BnMediaResourceMonitor : public BnInterface<IMediaResourceMonitor> {
+public:
+    virtual status_t onTransact(uint32_t code, const Parcel& data, Parcel* reply,
+            uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_I_MEDIA_RESOURCE_MONITOR_H