1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "RemoteDisplay" 18 19 #include "jni.h" 20 #include "JNIHelp.h" 21 22 #include "android_os_Parcel.h" 23 #include "android_util_Binder.h" 24 25 #include "core_jni_helpers.h" 26 #include <android_runtime/android_view_Surface.h> 27 #include <android_runtime/Log.h> 28 29 #include <binder/IServiceManager.h> 30 31 #include <gui/IGraphicBufferProducer.h> 32 33 #include <media/IMediaPlayerService.h> 34 #include <media/IRemoteDisplay.h> 35 #include <media/IRemoteDisplayClient.h> 36 37 #include <utils/Log.h> 38 39 #include <ScopedUtfChars.h> 40 41 namespace android { 42 43 static struct { 44 jmethodID notifyDisplayConnected; 45 jmethodID notifyDisplayDisconnected; 46 jmethodID notifyDisplayError; 47 } gRemoteDisplayClassInfo; 48 49 // ---------------------------------------------------------------------------- 50 51 class NativeRemoteDisplayClient : public BnRemoteDisplayClient { 52 public: 53 NativeRemoteDisplayClient(JNIEnv* env, jobject remoteDisplayObj) : 54 mRemoteDisplayObjGlobal(env->NewGlobalRef(remoteDisplayObj)) { 55 } 56 57 protected: 58 ~NativeRemoteDisplayClient() { 59 JNIEnv* env = AndroidRuntime::getJNIEnv(); 60 env->DeleteGlobalRef(mRemoteDisplayObjGlobal); 61 } 62 63 public: 64 virtual void onDisplayConnected(const sp<IGraphicBufferProducer>& bufferProducer, 65 uint32_t width, uint32_t height, uint32_t flags, uint32_t session) { 66 JNIEnv* env = AndroidRuntime::getJNIEnv(); 67 68 jobject surfaceObj = android_view_Surface_createFromIGraphicBufferProducer(env, bufferProducer); 69 if (surfaceObj == NULL) { 70 ALOGE("Could not create Surface from surface texture %p provided by media server.", 71 bufferProducer.get()); 72 return; 73 } 74 75 env->CallVoidMethod(mRemoteDisplayObjGlobal, 76 gRemoteDisplayClassInfo.notifyDisplayConnected, 77 surfaceObj, width, height, flags, session); 78 env->DeleteLocalRef(surfaceObj); 79 checkAndClearExceptionFromCallback(env, "notifyDisplayConnected"); 80 } 81 82 virtual void onDisplayDisconnected() { 83 JNIEnv* env = AndroidRuntime::getJNIEnv(); 84 85 env->CallVoidMethod(mRemoteDisplayObjGlobal, 86 gRemoteDisplayClassInfo.notifyDisplayDisconnected); 87 checkAndClearExceptionFromCallback(env, "notifyDisplayDisconnected"); 88 } 89 90 virtual void onDisplayError(int32_t error) { 91 JNIEnv* env = AndroidRuntime::getJNIEnv(); 92 93 env->CallVoidMethod(mRemoteDisplayObjGlobal, 94 gRemoteDisplayClassInfo.notifyDisplayError, error); 95 checkAndClearExceptionFromCallback(env, "notifyDisplayError"); 96 } 97 98 private: 99 jobject mRemoteDisplayObjGlobal; 100 101 static void checkAndClearExceptionFromCallback(JNIEnv* env, const char* methodName) { 102 if (env->ExceptionCheck()) { 103 ALOGE("An exception was thrown by callback '%s'.", methodName); 104 LOGE_EX(env); 105 env->ExceptionClear(); 106 } 107 } 108 }; 109 110 class NativeRemoteDisplay { 111 public: 112 NativeRemoteDisplay(const sp<IRemoteDisplay>& display, 113 const sp<NativeRemoteDisplayClient>& client) : 114 mDisplay(display), mClient(client) { 115 } 116 117 ~NativeRemoteDisplay() { 118 mDisplay->dispose(); 119 } 120 121 void pause() { 122 mDisplay->pause(); 123 } 124 125 void resume() { 126 mDisplay->resume(); 127 } 128 129 private: 130 sp<IRemoteDisplay> mDisplay; 131 sp<NativeRemoteDisplayClient> mClient; 132 }; 133 134 135 // ---------------------------------------------------------------------------- 136 137 static jlong nativeListen(JNIEnv* env, jobject remoteDisplayObj, jstring ifaceStr, 138 jstring opPackageNameStr) { 139 ScopedUtfChars iface(env, ifaceStr); 140 ScopedUtfChars opPackageName(env, opPackageNameStr); 141 142 sp<IServiceManager> sm = defaultServiceManager(); 143 sp<IMediaPlayerService> service = interface_cast<IMediaPlayerService>( 144 sm->getService(String16("media.player"))); 145 if (service == NULL) { 146 ALOGE("Could not obtain IMediaPlayerService from service manager"); 147 return 0; 148 } 149 150 sp<NativeRemoteDisplayClient> client(new NativeRemoteDisplayClient(env, remoteDisplayObj)); 151 sp<IRemoteDisplay> display = service->listenForRemoteDisplay(String16(opPackageName.c_str()), 152 client, String8(iface.c_str())); 153 if (display == NULL) { 154 ALOGE("Media player service rejected request to listen for remote display '%s'.", 155 iface.c_str()); 156 return 0; 157 } 158 159 NativeRemoteDisplay* wrapper = new NativeRemoteDisplay(display, client); 160 return reinterpret_cast<jlong>(wrapper); 161 } 162 163 static void nativePause(JNIEnv* env, jobject remoteDisplayObj, jlong ptr) { 164 NativeRemoteDisplay* wrapper = reinterpret_cast<NativeRemoteDisplay*>(ptr); 165 wrapper->pause(); 166 } 167 168 static void nativeResume(JNIEnv* env, jobject remoteDisplayObj, jlong ptr) { 169 NativeRemoteDisplay* wrapper = reinterpret_cast<NativeRemoteDisplay*>(ptr); 170 wrapper->resume(); 171 } 172 173 static void nativeDispose(JNIEnv* env, jobject remoteDisplayObj, jlong ptr) { 174 NativeRemoteDisplay* wrapper = reinterpret_cast<NativeRemoteDisplay*>(ptr); 175 delete wrapper; 176 } 177 178 // ---------------------------------------------------------------------------- 179 180 static const JNINativeMethod gMethods[] = { 181 {"nativeListen", "(Ljava/lang/String;Ljava/lang/String;)J", 182 (void*)nativeListen }, 183 {"nativeDispose", "(J)V", 184 (void*)nativeDispose }, 185 {"nativePause", "(J)V", 186 (void*)nativePause }, 187 {"nativeResume", "(J)V", 188 (void*)nativeResume }, 189 }; 190 191 int register_android_media_RemoteDisplay(JNIEnv* env) 192 { 193 int err = RegisterMethodsOrDie(env, "android/media/RemoteDisplay", gMethods, NELEM(gMethods)); 194 195 jclass clazz = FindClassOrDie(env, "android/media/RemoteDisplay"); 196 gRemoteDisplayClassInfo.notifyDisplayConnected = GetMethodIDOrDie(env, 197 clazz, "notifyDisplayConnected", "(Landroid/view/Surface;IIII)V"); 198 gRemoteDisplayClassInfo.notifyDisplayDisconnected = GetMethodIDOrDie(env, 199 clazz, "notifyDisplayDisconnected", "()V"); 200 gRemoteDisplayClassInfo.notifyDisplayError = GetMethodIDOrDie(env, 201 clazz, "notifyDisplayError", "(I)V"); 202 return err; 203 } 204 205 }; 206
