265 lines
8.2 KiB
C++
265 lines
8.2 KiB
C++
/*
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**
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** Copyright (C) 2008 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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#include <stdint.h>
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#include <sys/types.h>
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#include <binder/Parcel.h>
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#include <SkBitmap.h>
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#include <media/IMediaMetadataRetriever.h>
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// The binder is supposed to propagate the scheduler group across
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// the binder interface so that remote calls are executed with
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// the same priority as local calls. This is currently not working
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// so this change puts in a temporary hack to fix the issue with
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// metadata retrieval which can be a huge CPU hit if done on a
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// foreground thread.
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#ifndef DISABLE_GROUP_SCHEDULE_HACK
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/* desktop Linux needs a little help with gettid() */
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#if defined(HAVE_GETTID) && !defined(HAVE_ANDROID_OS)
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#define __KERNEL__
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# include <linux/unistd.h>
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#ifdef _syscall0
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_syscall0(pid_t,gettid)
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#else
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pid_t gettid() { return syscall(__NR_gettid);}
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#endif
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#undef __KERNEL__
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#endif
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static int myTid() {
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#ifdef HAVE_GETTID
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return gettid();
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#else
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return getpid();
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#endif
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}
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#undef LOG_TAG
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#define LOG_TAG "IMediaMetadataRetriever"
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#include <utils/Log.h>
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#include <cutils/sched_policy.h>
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namespace android {
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static void sendSchedPolicy(Parcel& data)
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{
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SchedPolicy policy;
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get_sched_policy(myTid(), &policy);
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data.writeInt32(policy);
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}
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static void setSchedPolicy(const Parcel& data)
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{
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SchedPolicy policy = (SchedPolicy) data.readInt32();
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set_sched_policy(myTid(), policy);
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}
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static void restoreSchedPolicy()
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{
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set_sched_policy(myTid(), SP_FOREGROUND);
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}
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}; // end namespace android
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#endif
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namespace android {
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enum {
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DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
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SET_DATA_SOURCE_URL,
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SET_DATA_SOURCE_FD,
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GET_FRAME_AT_TIME,
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EXTRACT_ALBUM_ART,
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EXTRACT_METADATA,
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};
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class BpMediaMetadataRetriever: public BpInterface<IMediaMetadataRetriever>
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{
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public:
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BpMediaMetadataRetriever(const sp<IBinder>& impl)
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: BpInterface<IMediaMetadataRetriever>(impl)
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{
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}
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// disconnect from media metadata retriever service
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void disconnect()
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{
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Parcel data, reply;
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data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
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remote()->transact(DISCONNECT, data, &reply);
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}
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status_t setDataSource(const char* srcUrl)
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{
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Parcel data, reply;
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data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
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data.writeCString(srcUrl);
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remote()->transact(SET_DATA_SOURCE_URL, data, &reply);
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return reply.readInt32();
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}
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status_t setDataSource(int fd, int64_t offset, int64_t length)
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{
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Parcel data, reply;
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data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
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data.writeFileDescriptor(fd);
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data.writeInt64(offset);
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data.writeInt64(length);
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remote()->transact(SET_DATA_SOURCE_FD, data, &reply);
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return reply.readInt32();
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}
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sp<IMemory> getFrameAtTime(int64_t timeUs, int option)
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{
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LOGV("getTimeAtTime: time(%lld us) and option(%d)", timeUs, option);
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Parcel data, reply;
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data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
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data.writeInt64(timeUs);
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data.writeInt32(option);
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#ifndef DISABLE_GROUP_SCHEDULE_HACK
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sendSchedPolicy(data);
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#endif
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remote()->transact(GET_FRAME_AT_TIME, data, &reply);
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status_t ret = reply.readInt32();
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if (ret != NO_ERROR) {
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return NULL;
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}
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return interface_cast<IMemory>(reply.readStrongBinder());
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}
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sp<IMemory> extractAlbumArt()
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{
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Parcel data, reply;
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data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
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#ifndef DISABLE_GROUP_SCHEDULE_HACK
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sendSchedPolicy(data);
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#endif
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remote()->transact(EXTRACT_ALBUM_ART, data, &reply);
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status_t ret = reply.readInt32();
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if (ret != NO_ERROR) {
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return NULL;
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}
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return interface_cast<IMemory>(reply.readStrongBinder());
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}
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const char* extractMetadata(int keyCode)
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{
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Parcel data, reply;
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data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
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#ifndef DISABLE_GROUP_SCHEDULE_HACK
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sendSchedPolicy(data);
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#endif
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data.writeInt32(keyCode);
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remote()->transact(EXTRACT_METADATA, data, &reply);
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status_t ret = reply.readInt32();
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if (ret != NO_ERROR) {
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return NULL;
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}
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return reply.readCString();
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}
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};
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IMPLEMENT_META_INTERFACE(MediaMetadataRetriever, "android.media.IMediaMetadataRetriever");
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// ----------------------------------------------------------------------
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status_t BnMediaMetadataRetriever::onTransact(
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uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
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{
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switch (code) {
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case DISCONNECT: {
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CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
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disconnect();
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return NO_ERROR;
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} break;
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case SET_DATA_SOURCE_URL: {
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CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
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const char* srcUrl = data.readCString();
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reply->writeInt32(setDataSource(srcUrl));
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return NO_ERROR;
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} break;
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case SET_DATA_SOURCE_FD: {
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CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
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int fd = dup(data.readFileDescriptor());
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int64_t offset = data.readInt64();
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int64_t length = data.readInt64();
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reply->writeInt32(setDataSource(fd, offset, length));
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return NO_ERROR;
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} break;
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case GET_FRAME_AT_TIME: {
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CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
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int64_t timeUs = data.readInt64();
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int option = data.readInt32();
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LOGV("getTimeAtTime: time(%lld us) and option(%d)", timeUs, option);
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#ifndef DISABLE_GROUP_SCHEDULE_HACK
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setSchedPolicy(data);
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#endif
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sp<IMemory> bitmap = getFrameAtTime(timeUs, option);
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if (bitmap != 0) { // Don't send NULL across the binder interface
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reply->writeInt32(NO_ERROR);
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reply->writeStrongBinder(bitmap->asBinder());
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} else {
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reply->writeInt32(UNKNOWN_ERROR);
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}
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#ifndef DISABLE_GROUP_SCHEDULE_HACK
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restoreSchedPolicy();
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#endif
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return NO_ERROR;
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} break;
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case EXTRACT_ALBUM_ART: {
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CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
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#ifndef DISABLE_GROUP_SCHEDULE_HACK
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setSchedPolicy(data);
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#endif
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sp<IMemory> albumArt = extractAlbumArt();
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if (albumArt != 0) { // Don't send NULL across the binder interface
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reply->writeInt32(NO_ERROR);
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reply->writeStrongBinder(albumArt->asBinder());
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} else {
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reply->writeInt32(UNKNOWN_ERROR);
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}
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#ifndef DISABLE_GROUP_SCHEDULE_HACK
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restoreSchedPolicy();
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#endif
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return NO_ERROR;
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} break;
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case EXTRACT_METADATA: {
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CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
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#ifndef DISABLE_GROUP_SCHEDULE_HACK
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setSchedPolicy(data);
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#endif
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int keyCode = data.readInt32();
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const char* value = extractMetadata(keyCode);
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if (value != NULL) { // Don't send NULL across the binder interface
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reply->writeInt32(NO_ERROR);
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reply->writeCString(value);
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} else {
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reply->writeInt32(UNKNOWN_ERROR);
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}
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#ifndef DISABLE_GROUP_SCHEDULE_HACK
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restoreSchedPolicy();
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#endif
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return NO_ERROR;
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} break;
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default:
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return BBinder::onTransact(code, data, reply, flags);
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}
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}
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// ----------------------------------------------------------------------------
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}; // namespace android
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