1 files changed, 182 insertions, 0 deletions
diff --git a/core/jni/android_media_RemoteDisplay.cpp b/core/jni/android_media_RemoteDisplay.cpp
new file mode 100644
index 0000000..5d24f61
--- /dev/null
+++ b/core/jni/android_media_RemoteDisplay.cpp
@@ -0,0 +1,182 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+#define LOG_TAG "RemoteDisplay"
+
+#include "jni.h"
+#include "JNIHelp.h"
+
+#include "android_os_Parcel.h"
+#include "android_util_Binder.h"
+
+#include <android_runtime/AndroidRuntime.h>
+#include <android_runtime/android_view_Surface.h>
+
+#include <binder/IServiceManager.h>
+
+#include <gui/ISurfaceTexture.h>
+
+#include <media/IMediaPlayerService.h>
+#include <media/IRemoteDisplay.h>
+#include <media/IRemoteDisplayClient.h>
+
+#include <utils/Log.h>
+
+#include <ScopedUtfChars.h>
+
+namespace android {
+
+static struct {
+    jmethodID notifyDisplayConnected;
+    jmethodID notifyDisplayDisconnected;
+    jmethodID notifyDisplayError;
+} gRemoteDisplayClassInfo;
+
+// ----------------------------------------------------------------------------
+
+class NativeRemoteDisplayClient : public BnRemoteDisplayClient {
+public:
+    NativeRemoteDisplayClient(JNIEnv* env, jobject remoteDisplayObj) :
+            mRemoteDisplayObjGlobal(env->NewGlobalRef(remoteDisplayObj)) {
+    }
+
+protected:
+    ~NativeRemoteDisplayClient() {
+        JNIEnv* env = AndroidRuntime::getJNIEnv();
+        env->DeleteGlobalRef(mRemoteDisplayObjGlobal);
+    }
+
+public:
+    virtual void onDisplayConnected(const sp<ISurfaceTexture>& surfaceTexture,
+            uint32_t width, uint32_t height, uint32_t flags) {
+        JNIEnv* env = AndroidRuntime::getJNIEnv();
+
+        jobject surfaceObj = android_view_Surface_createFromISurfaceTexture(env, surfaceTexture);
+        if (surfaceObj == NULL) {
+            ALOGE("Could not create Surface from surface texture %p provided by media server.",
+                    surfaceTexture.get());
+            return;
+        }
+
+        env->CallVoidMethod(mRemoteDisplayObjGlobal,
+                gRemoteDisplayClassInfo.notifyDisplayConnected,
+                surfaceObj, width, height, flags);
+        env->DeleteLocalRef(surfaceObj);
+        checkAndClearExceptionFromCallback(env, "notifyDisplayConnected");
+    }
+
+    virtual void onDisplayDisconnected() {
+        JNIEnv* env = AndroidRuntime::getJNIEnv();
+
+        env->CallVoidMethod(mRemoteDisplayObjGlobal,
+                gRemoteDisplayClassInfo.notifyDisplayDisconnected);
+        checkAndClearExceptionFromCallback(env, "notifyDisplayDisconnected");
+    }
+
+    virtual void onDisplayError(int32_t error) {
+        JNIEnv* env = AndroidRuntime::getJNIEnv();
+
+        env->CallVoidMethod(mRemoteDisplayObjGlobal,
+                gRemoteDisplayClassInfo.notifyDisplayError, error);
+        checkAndClearExceptionFromCallback(env, "notifyDisplayError");
+    }
+
+private:
+    jobject mRemoteDisplayObjGlobal;
+
+    static void checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) {
+        if (env->ExceptionCheck()) {
+            ALOGE("An exception was thrown by callback '%s'.", methodName);
+            LOGE_EX(env);
+            env->ExceptionClear();
+        }
+    }
+};
+
+class NativeRemoteDisplay {
+public:
+    NativeRemoteDisplay(const sp<IRemoteDisplay>& display,
+            const sp<NativeRemoteDisplayClient>& client) :
+            mDisplay(display), mClient(client) {
+    }
+
+    ~NativeRemoteDisplay() {
+        mDisplay->dispose();
+    }
+
+private:
+    sp<IRemoteDisplay> mDisplay;
+    sp<NativeRemoteDisplayClient> mClient;
+};
+
+
+// ----------------------------------------------------------------------------
+
+static jint nativeListen(JNIEnv* env, jobject remoteDisplayObj, jstring ifaceStr) {
+    ScopedUtfChars iface(env, ifaceStr);
+
+    sp<IServiceManager> sm = defaultServiceManager();
+    sp<IMediaPlayerService> service = interface_cast<IMediaPlayerService>(
+            sm->getService(String16("media.player")));
+    if (service == NULL) {
+        ALOGE("Could not obtain IMediaPlayerService from service manager");
+        return 0;
+    }
+
+    sp<NativeRemoteDisplayClient> client(new NativeRemoteDisplayClient(env, remoteDisplayObj));
+    sp<IRemoteDisplay> display = service->listenForRemoteDisplay(
+            client, String8(iface.c_str()));
+    if (display == NULL) {
+        ALOGE("Media player service rejected request to listen for remote display '%s'.",
+                iface.c_str());
+        return 0;
+    }
+
+    NativeRemoteDisplay* wrapper = new NativeRemoteDisplay(display, client);
+    return reinterpret_cast<jint>(wrapper);
+}
+
+static void nativeDispose(JNIEnv* env, jobject remoteDisplayObj, jint ptr) {
+    NativeRemoteDisplay* wrapper = reinterpret_cast<NativeRemoteDisplay*>(ptr);
+    delete wrapper;
+}
+
+// ----------------------------------------------------------------------------
+
+static JNINativeMethod gMethods[] = {
+    {"nativeListen", "(Ljava/lang/String;)I",
+            (void*)nativeListen },
+    {"nativeDispose", "(I)V",
+            (void*)nativeDispose },
+};
+
+int register_android_media_RemoteDisplay(JNIEnv* env)
+{
+    int err = AndroidRuntime::registerNativeMethods(env, "android/media/RemoteDisplay",
+            gMethods, NELEM(gMethods));
+
+    jclass clazz = env->FindClass("android/media/RemoteDisplay");
+    gRemoteDisplayClassInfo.notifyDisplayConnected =
+            env->GetMethodID(clazz, "notifyDisplayConnected",
+                    "(Landroid/view/Surface;III)V");
+    gRemoteDisplayClassInfo.notifyDisplayDisconnected =
+            env->GetMethodID(clazz, "notifyDisplayDisconnected", "()V");
+    gRemoteDisplayClassInfo.notifyDisplayError =
+            env->GetMethodID(clazz, "notifyDisplayError", "(I)V");
+    return err;
+}
+
+};