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/*
**
** Copyright (C) 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.
*/
#include <stdint.h>
#include <sys/types.h>
#include <binder/Parcel.h>
#include <media/IMediaMetadataRetriever.h>
#include <utils/String8.h>
// The binder is supposed to propagate the scheduler group across
// the binder interface so that remote calls are executed with
// the same priority as local calls. This is currently not working
// so this change puts in a temporary hack to fix the issue with
// metadata retrieval which can be a huge CPU hit if done on a
// foreground thread.
#ifndef DISABLE_GROUP_SCHEDULE_HACK
#undef LOG_TAG
#define LOG_TAG "IMediaMetadataRetriever"
#include <utils/Log.h>
#include <cutils/sched_policy.h>
namespace android {
static void sendSchedPolicy(Parcel& data)
{
SchedPolicy policy;
get_sched_policy(gettid(), &policy);
data.writeInt32(policy);
}
static void setSchedPolicy(const Parcel& data)
{
SchedPolicy policy = (SchedPolicy) data.readInt32();
set_sched_policy(gettid(), policy);
}
static void restoreSchedPolicy()
{
set_sched_policy(gettid(), SP_FOREGROUND);
}
}; // end namespace android
#endif
namespace android {
enum {
DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
SET_DATA_SOURCE_URL,
SET_DATA_SOURCE_FD,
GET_FRAME_AT_TIME,
EXTRACT_ALBUM_ART,
EXTRACT_METADATA,
};
class BpMediaMetadataRetriever: public BpInterface<IMediaMetadataRetriever>
{
public:
BpMediaMetadataRetriever(const sp<IBinder>& impl)
: BpInterface<IMediaMetadataRetriever>(impl)
{
}
// disconnect from media metadata retriever service
void disconnect()
{
Parcel data, reply;
data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
remote()->transact(DISCONNECT, data, &reply);
}
status_t setDataSource(
const char *srcUrl, const KeyedVector<String8, String8> *headers)
{
Parcel data, reply;
data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
data.writeCString(srcUrl);
if (headers == NULL) {
data.writeInt32(0);
} else {
// serialize the headers
data.writeInt32(headers->size());
for (size_t i = 0; i < headers->size(); ++i) {
data.writeString8(headers->keyAt(i));
data.writeString8(headers->valueAt(i));
}
}
remote()->transact(SET_DATA_SOURCE_URL, data, &reply);
return reply.readInt32();
}
status_t setDataSource(int fd, int64_t offset, int64_t length)
{
Parcel data, reply;
data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
data.writeFileDescriptor(fd);
data.writeInt64(offset);
data.writeInt64(length);
remote()->transact(SET_DATA_SOURCE_FD, data, &reply);
return reply.readInt32();
}
sp<IMemory> getFrameAtTime(int64_t timeUs, int option)
{
ALOGV("getTimeAtTime: time(%lld us) and option(%d)", timeUs, option);
Parcel data, reply;
data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
data.writeInt64(timeUs);
data.writeInt32(option);
#ifndef DISABLE_GROUP_SCHEDULE_HACK
sendSchedPolicy(data);
#endif
remote()->transact(GET_FRAME_AT_TIME, data, &reply);
status_t ret = reply.readInt32();
if (ret != NO_ERROR) {
return NULL;
}
return interface_cast<IMemory>(reply.readStrongBinder());
}
sp<IMemory> extractAlbumArt()
{
Parcel data, reply;
data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
#ifndef DISABLE_GROUP_SCHEDULE_HACK
sendSchedPolicy(data);
#endif
remote()->transact(EXTRACT_ALBUM_ART, data, &reply);
status_t ret = reply.readInt32();
if (ret != NO_ERROR) {
return NULL;
}
return interface_cast<IMemory>(reply.readStrongBinder());
}
const char* extractMetadata(int keyCode)
{
Parcel data, reply;
data.writeInterfaceToken(IMediaMetadataRetriever::getInterfaceDescriptor());
#ifndef DISABLE_GROUP_SCHEDULE_HACK
sendSchedPolicy(data);
#endif
data.writeInt32(keyCode);
remote()->transact(EXTRACT_METADATA, data, &reply);
status_t ret = reply.readInt32();
if (ret != NO_ERROR) {
return NULL;
}
return reply.readCString();
}
};
IMPLEMENT_META_INTERFACE(MediaMetadataRetriever, "android.media.IMediaMetadataRetriever");
// ----------------------------------------------------------------------
status_t BnMediaMetadataRetriever::onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
switch (code) {
case DISCONNECT: {
CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
disconnect();
return NO_ERROR;
} break;
case SET_DATA_SOURCE_URL: {
CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
const char* srcUrl = data.readCString();
KeyedVector<String8, String8> headers;
int32_t numHeaders = data.readInt32();
for (int i = 0; i < numHeaders; ++i) {
String8 key = data.readString8();
String8 value = data.readString8();
headers.add(key, value);
}
reply->writeInt32(
setDataSource(srcUrl, numHeaders > 0 ? &headers : NULL));
return NO_ERROR;
} break;
case SET_DATA_SOURCE_FD: {
CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
int fd = dup(data.readFileDescriptor());
int64_t offset = data.readInt64();
int64_t length = data.readInt64();
reply->writeInt32(setDataSource(fd, offset, length));
return NO_ERROR;
} break;
case GET_FRAME_AT_TIME: {
CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
int64_t timeUs = data.readInt64();
int option = data.readInt32();
ALOGV("getTimeAtTime: time(%lld us) and option(%d)", timeUs, option);
#ifndef DISABLE_GROUP_SCHEDULE_HACK
setSchedPolicy(data);
#endif
sp<IMemory> bitmap = getFrameAtTime(timeUs, option);
if (bitmap != 0) { // Don't send NULL across the binder interface
reply->writeInt32(NO_ERROR);
reply->writeStrongBinder(bitmap->asBinder());
} else {
reply->writeInt32(UNKNOWN_ERROR);
}
#ifndef DISABLE_GROUP_SCHEDULE_HACK
restoreSchedPolicy();
#endif
return NO_ERROR;
} break;
case EXTRACT_ALBUM_ART: {
CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
#ifndef DISABLE_GROUP_SCHEDULE_HACK
setSchedPolicy(data);
#endif
sp<IMemory> albumArt = extractAlbumArt();
if (albumArt != 0) { // Don't send NULL across the binder interface
reply->writeInt32(NO_ERROR);
reply->writeStrongBinder(albumArt->asBinder());
} else {
reply->writeInt32(UNKNOWN_ERROR);
}
#ifndef DISABLE_GROUP_SCHEDULE_HACK
restoreSchedPolicy();
#endif
return NO_ERROR;
} break;
case EXTRACT_METADATA: {
CHECK_INTERFACE(IMediaMetadataRetriever, data, reply);
#ifndef DISABLE_GROUP_SCHEDULE_HACK
setSchedPolicy(data);
#endif
int keyCode = data.readInt32();
const char* value = extractMetadata(keyCode);
if (value != NULL) { // Don't send NULL across the binder interface
reply->writeInt32(NO_ERROR);
reply->writeCString(value);
} else {
reply->writeInt32(UNKNOWN_ERROR);
}
#ifndef DISABLE_GROUP_SCHEDULE_HACK
restoreSchedPolicy();
#endif
return NO_ERROR;
} break;
default:
return BBinder::onTransact(code, data, reply, flags);
}
}
// ----------------------------------------------------------------------------
}; // namespace android
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