| /* |
| ** |
| ** Copyright 2008, 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_NDEBUG 0 |
| #define LOG_TAG "MediaMetadataRetriever" |
| |
| #include <binder/IServiceManager.h> |
| #include <binder/IPCThreadState.h> |
| #include <media/mediametadataretriever.h> |
| #include <media/IMediaPlayerService.h> |
| #include <utils/Log.h> |
| #include <dlfcn.h> |
| |
| namespace android { |
| |
| // client singleton for binder interface to service |
| Mutex MediaMetadataRetriever::sServiceLock; |
| sp<IMediaPlayerService> MediaMetadataRetriever::sService; |
| sp<MediaMetadataRetriever::DeathNotifier> MediaMetadataRetriever::sDeathNotifier; |
| |
| const sp<IMediaPlayerService>& MediaMetadataRetriever::getService() |
| { |
| Mutex::Autolock lock(sServiceLock); |
| if (sService.get() == 0) { |
| sp<IServiceManager> sm = defaultServiceManager(); |
| sp<IBinder> binder; |
| do { |
| binder = sm->getService(String16("media.player")); |
| if (binder != 0) { |
| break; |
| } |
| LOGW("MediaPlayerService not published, waiting..."); |
| usleep(500000); // 0.5 s |
| } while(true); |
| if (sDeathNotifier == NULL) { |
| sDeathNotifier = new DeathNotifier(); |
| } |
| binder->linkToDeath(sDeathNotifier); |
| sService = interface_cast<IMediaPlayerService>(binder); |
| } |
| LOGE_IF(sService == 0, "no MediaPlayerService!?"); |
| return sService; |
| } |
| |
| MediaMetadataRetriever::MediaMetadataRetriever() |
| { |
| LOGV("constructor"); |
| const sp<IMediaPlayerService>& service(getService()); |
| if (service == 0) { |
| LOGE("failed to obtain MediaMetadataRetrieverService"); |
| return; |
| } |
| sp<IMediaMetadataRetriever> retriever(service->createMetadataRetriever(getpid())); |
| if (retriever == 0) { |
| LOGE("failed to create IMediaMetadataRetriever object from server"); |
| } |
| mRetriever = retriever; |
| } |
| |
| MediaMetadataRetriever::~MediaMetadataRetriever() |
| { |
| LOGV("destructor"); |
| disconnect(); |
| IPCThreadState::self()->flushCommands(); |
| } |
| |
| void MediaMetadataRetriever::disconnect() |
| { |
| LOGV("disconnect"); |
| sp<IMediaMetadataRetriever> retriever; |
| { |
| Mutex::Autolock _l(mLock); |
| retriever = mRetriever; |
| mRetriever.clear(); |
| } |
| if (retriever != 0) { |
| retriever->disconnect(); |
| } |
| } |
| |
| status_t MediaMetadataRetriever::setDataSource(const char* srcUrl) |
| { |
| LOGV("setDataSource"); |
| Mutex::Autolock _l(mLock); |
| if (mRetriever == 0) { |
| LOGE("retriever is not initialized"); |
| return INVALID_OPERATION; |
| } |
| if (srcUrl == NULL) { |
| LOGE("data source is a null pointer"); |
| return UNKNOWN_ERROR; |
| } |
| LOGV("data source (%s)", srcUrl); |
| return mRetriever->setDataSource(srcUrl); |
| } |
| |
| status_t MediaMetadataRetriever::setDataSource(int fd, int64_t offset, int64_t length) |
| { |
| LOGV("setDataSource(%d, %lld, %lld)", fd, offset, length); |
| Mutex::Autolock _l(mLock); |
| if (mRetriever == 0) { |
| LOGE("retriever is not initialized"); |
| return INVALID_OPERATION; |
| } |
| if (fd < 0 || offset < 0 || length < 0) { |
| LOGE("Invalid negative argument"); |
| return UNKNOWN_ERROR; |
| } |
| return mRetriever->setDataSource(fd, offset, length); |
| } |
| |
| status_t MediaMetadataRetriever::setMode(int mode) |
| { |
| LOGV("setMode(%d)", mode); |
| Mutex::Autolock _l(mLock); |
| if (mRetriever == 0) { |
| LOGE("retriever is not initialized"); |
| return INVALID_OPERATION; |
| } |
| return mRetriever->setMode(mode); |
| } |
| |
| status_t MediaMetadataRetriever::getMode(int* mode) |
| { |
| LOGV("getMode"); |
| Mutex::Autolock _l(mLock); |
| if (mRetriever == 0) { |
| LOGE("retriever is not initialized"); |
| return INVALID_OPERATION; |
| } |
| return mRetriever->getMode(mode); |
| } |
| |
| sp<IMemory> MediaMetadataRetriever::captureFrame() |
| { |
| LOGV("captureFrame"); |
| Mutex::Autolock _l(mLock); |
| if (mRetriever == 0) { |
| LOGE("retriever is not initialized"); |
| return NULL; |
| } |
| return mRetriever->captureFrame(); |
| } |
| |
| const char* MediaMetadataRetriever::extractMetadata(int keyCode) |
| { |
| LOGV("extractMetadata(%d)", keyCode); |
| Mutex::Autolock _l(mLock); |
| if (mRetriever == 0) { |
| LOGE("retriever is not initialized"); |
| return NULL; |
| } |
| return mRetriever->extractMetadata(keyCode); |
| } |
| |
| sp<IMemory> MediaMetadataRetriever::extractAlbumArt() |
| { |
| LOGV("extractAlbumArt"); |
| Mutex::Autolock _l(mLock); |
| if (mRetriever == 0) { |
| LOGE("retriever is not initialized"); |
| return NULL; |
| } |
| return mRetriever->extractAlbumArt(); |
| } |
| |
| void MediaMetadataRetriever::DeathNotifier::binderDied(const wp<IBinder>& who) { |
| Mutex::Autolock lock(MediaMetadataRetriever::sServiceLock); |
| MediaMetadataRetriever::sService.clear(); |
| LOGW("MediaMetadataRetriever server died!"); |
| } |
| |
| MediaMetadataRetriever::DeathNotifier::~DeathNotifier() |
| { |
| Mutex::Autolock lock(sServiceLock); |
| if (sService != 0) { |
| sService->asBinder()->unlinkToDeath(this); |
| } |
| } |
| |
| }; // namespace android |