112 lines
3.4 KiB
C++
112 lines
3.4 KiB
C++
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/*
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** Copyright 2010, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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//#define LOG_NDEBUG 0
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#define LOG_TAG "IMediaDeathNotifier"
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#include <utils/Log.h>
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#include <binder/IServiceManager.h>
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#include <binder/IPCThreadState.h>
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#include <media/IMediaDeathNotifier.h>
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namespace android {
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// client singleton for binder interface to services
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Mutex IMediaDeathNotifier::sServiceLock;
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sp<IMediaPlayerService> IMediaDeathNotifier::sMediaPlayerService;
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sp<IMediaDeathNotifier::DeathNotifier> IMediaDeathNotifier::sDeathNotifier;
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SortedVector< wp<IMediaDeathNotifier> > IMediaDeathNotifier::sObitRecipients;
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// establish binder interface to MediaPlayerService
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/*static*/const sp<IMediaPlayerService>&
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IMediaDeathNotifier::getMediaPlayerService()
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{
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LOGV("getMediaPlayerService");
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Mutex::Autolock _l(sServiceLock);
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if (sMediaPlayerService.get() == 0) {
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sp<IServiceManager> sm = defaultServiceManager();
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sp<IBinder> binder;
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do {
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binder = sm->getService(String16("media.player"));
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if (binder != 0) {
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break;
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}
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LOGW("Media player service not published, waiting...");
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usleep(500000); // 0.5 s
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} while(true);
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if (sDeathNotifier == NULL) {
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sDeathNotifier = new DeathNotifier();
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}
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binder->linkToDeath(sDeathNotifier);
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sMediaPlayerService = interface_cast<IMediaPlayerService>(binder);
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}
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LOGE_IF(sMediaPlayerService == 0, "no media player service!?");
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return sMediaPlayerService;
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}
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/*static*/ void
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IMediaDeathNotifier::addObitRecipient(const wp<IMediaDeathNotifier>& recipient)
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{
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LOGV("addObitRecipient");
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Mutex::Autolock _l(sServiceLock);
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sObitRecipients.add(recipient);
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}
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/*static*/ void
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IMediaDeathNotifier::removeObitRecipient(const wp<IMediaDeathNotifier>& recipient)
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{
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LOGV("removeObitRecipient");
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Mutex::Autolock _l(sServiceLock);
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sObitRecipients.remove(recipient);
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}
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void
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IMediaDeathNotifier::DeathNotifier::binderDied(const wp<IBinder>& who) {
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LOGW("media server died");
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// Need to do this with the lock held
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SortedVector< wp<IMediaDeathNotifier> > list;
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{
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Mutex::Autolock _l(sServiceLock);
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sMediaPlayerService.clear();
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list = sObitRecipients;
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}
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// Notify application when media server dies.
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// Don't hold the static lock during callback in case app
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// makes a call that needs the lock.
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size_t count = list.size();
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for (size_t iter = 0; iter < count; ++iter) {
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sp<IMediaDeathNotifier> notifier = list[iter].promote();
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if (notifier != 0) {
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notifier->died();
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}
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}
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}
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IMediaDeathNotifier::DeathNotifier::~DeathNotifier()
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{
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LOGV("DeathNotifier::~DeathNotifier");
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Mutex::Autolock _l(sServiceLock);
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sObitRecipients.clear();
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if (sMediaPlayerService != 0) {
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sMediaPlayerService->asBinder()->unlinkToDeath(this);
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}
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}
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}; // namespace android
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