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 <android_runtime/AndroidRuntime.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:
NativeRemoteDisplayClient(JNIEnv * env,jobject remoteDisplayObj)53 NativeRemoteDisplayClient(JNIEnv* env, jobject remoteDisplayObj) :
54 mRemoteDisplayObjGlobal(env->NewGlobalRef(remoteDisplayObj)) {
55 }
56
57 protected:
~NativeRemoteDisplayClient()58 ~NativeRemoteDisplayClient() {
59 JNIEnv* env = AndroidRuntime::getJNIEnv();
60 env->DeleteGlobalRef(mRemoteDisplayObjGlobal);
61 }
62
63 public:
onDisplayConnected(const sp<IGraphicBufferProducer> & bufferProducer,uint32_t width,uint32_t height,uint32_t flags,uint32_t session)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
onDisplayDisconnected()82 virtual void onDisplayDisconnected() {
83 JNIEnv* env = AndroidRuntime::getJNIEnv();
84
85 env->CallVoidMethod(mRemoteDisplayObjGlobal,
86 gRemoteDisplayClassInfo.notifyDisplayDisconnected);
87 checkAndClearExceptionFromCallback(env, "notifyDisplayDisconnected");
88 }
89
onDisplayError(int32_t error)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
checkAndClearExceptionFromCallback(JNIEnv * env,const char * methodName)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:
NativeRemoteDisplay(const sp<IRemoteDisplay> & display,const sp<NativeRemoteDisplayClient> & client)112 NativeRemoteDisplay(const sp<IRemoteDisplay>& display,
113 const sp<NativeRemoteDisplayClient>& client) :
114 mDisplay(display), mClient(client) {
115 }
116
~NativeRemoteDisplay()117 ~NativeRemoteDisplay() {
118 mDisplay->dispose();
119 }
120
pause()121 void pause() {
122 mDisplay->pause();
123 }
124
resume()125 void resume() {
126 mDisplay->resume();
127 }
128
129 private:
130 sp<IRemoteDisplay> mDisplay;
131 sp<NativeRemoteDisplayClient> mClient;
132 };
133
134
135 // ----------------------------------------------------------------------------
136
nativeListen(JNIEnv * env,jobject remoteDisplayObj,jstring ifaceStr)137 static jlong nativeListen(JNIEnv* env, jobject remoteDisplayObj, jstring ifaceStr) {
138 ScopedUtfChars iface(env, ifaceStr);
139
140 sp<IServiceManager> sm = defaultServiceManager();
141 sp<IMediaPlayerService> service = interface_cast<IMediaPlayerService>(
142 sm->getService(String16("media.player")));
143 if (service == NULL) {
144 ALOGE("Could not obtain IMediaPlayerService from service manager");
145 return 0;
146 }
147
148 sp<NativeRemoteDisplayClient> client(new NativeRemoteDisplayClient(env, remoteDisplayObj));
149 sp<IRemoteDisplay> display = service->listenForRemoteDisplay(
150 client, String8(iface.c_str()));
151 if (display == NULL) {
152 ALOGE("Media player service rejected request to listen for remote display '%s'.",
153 iface.c_str());
154 return 0;
155 }
156
157 NativeRemoteDisplay* wrapper = new NativeRemoteDisplay(display, client);
158 return reinterpret_cast<jlong>(wrapper);
159 }
160
nativePause(JNIEnv * env,jobject remoteDisplayObj,jlong ptr)161 static void nativePause(JNIEnv* env, jobject remoteDisplayObj, jlong ptr) {
162 NativeRemoteDisplay* wrapper = reinterpret_cast<NativeRemoteDisplay*>(ptr);
163 wrapper->pause();
164 }
165
nativeResume(JNIEnv * env,jobject remoteDisplayObj,jlong ptr)166 static void nativeResume(JNIEnv* env, jobject remoteDisplayObj, jlong ptr) {
167 NativeRemoteDisplay* wrapper = reinterpret_cast<NativeRemoteDisplay*>(ptr);
168 wrapper->resume();
169 }
170
nativeDispose(JNIEnv * env,jobject remoteDisplayObj,jlong ptr)171 static void nativeDispose(JNIEnv* env, jobject remoteDisplayObj, jlong ptr) {
172 NativeRemoteDisplay* wrapper = reinterpret_cast<NativeRemoteDisplay*>(ptr);
173 delete wrapper;
174 }
175
176 // ----------------------------------------------------------------------------
177
178 static JNINativeMethod gMethods[] = {
179 {"nativeListen", "(Ljava/lang/String;)J",
180 (void*)nativeListen },
181 {"nativeDispose", "(J)V",
182 (void*)nativeDispose },
183 {"nativePause", "(J)V",
184 (void*)nativePause },
185 {"nativeResume", "(J)V",
186 (void*)nativeResume },
187 };
188
register_android_media_RemoteDisplay(JNIEnv * env)189 int register_android_media_RemoteDisplay(JNIEnv* env)
190 {
191 int err = AndroidRuntime::registerNativeMethods(env, "android/media/RemoteDisplay",
192 gMethods, NELEM(gMethods));
193
194 jclass clazz = env->FindClass("android/media/RemoteDisplay");
195 gRemoteDisplayClassInfo.notifyDisplayConnected =
196 env->GetMethodID(clazz, "notifyDisplayConnected",
197 "(Landroid/view/Surface;IIII)V");
198 gRemoteDisplayClassInfo.notifyDisplayDisconnected =
199 env->GetMethodID(clazz, "notifyDisplayDisconnected", "()V");
200 gRemoteDisplayClassInfo.notifyDisplayError =
201 env->GetMethodID(clazz, "notifyDisplayError", "(I)V");
202 return err;
203 }
204
205 };
206