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/*
**
** 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()
{
ALOGV("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()
{
ALOGV("destructor");
disconnect();
IPCThreadState::self()->flushCommands();
}
void MediaMetadataRetriever::disconnect()
{
ALOGV("disconnect");
sp<IMediaMetadataRetriever> retriever;
{
Mutex::Autolock _l(mLock);
retriever = mRetriever;
mRetriever.clear();
}
if (retriever != 0) {
retriever->disconnect();
}
}
status_t MediaMetadataRetriever::setDataSource(
const char *srcUrl, const KeyedVector<String8, String8> *headers)
{
ALOGV("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;
}
ALOGV("data source (%s)", srcUrl);
return mRetriever->setDataSource(srcUrl, headers);
}
status_t MediaMetadataRetriever::setDataSource(int fd, int64_t offset, int64_t length)
{
ALOGV("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);
}
sp<IMemory> MediaMetadataRetriever::getFrameAtTime(int64_t timeUs, int option)
{
ALOGV("getFrameAtTime: time(%lld us) option(%d)", timeUs, option);
Mutex::Autolock _l(mLock);
if (mRetriever == 0) {
LOGE("retriever is not initialized");
return NULL;
}
return mRetriever->getFrameAtTime(timeUs, option);
}
const char* MediaMetadataRetriever::extractMetadata(int keyCode)
{
ALOGV("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()
{
ALOGV("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
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