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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.
*/
#include <stdint.h>
#include <sys/types.h>
#include <utils/Parcel.h>
#include <ui/ICamera.h>
#define LOG_TAG "@@@@@@@@@@@ CAMERA @@@@@@@@@@@"
#include <utils/Log.h>
namespace android {
enum {
DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
SET_PREVIEW_DISPLAY,
SET_HAS_FRAME_CALLBACK,
START_PREVIEW,
STOP_PREVIEW,
AUTO_FOCUS,
TAKE_PICTURE,
SET_PARAMETERS,
GET_PARAMETERS
};
class BpCamera: public BpInterface<ICamera>
{
public:
BpCamera(const sp<IBinder>& impl)
: BpInterface<ICamera>(impl)
{
}
// disconnect from camera service
void disconnect()
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(DISCONNECT, data, &reply);
}
// pass the buffered ISurface to the camera service
status_t setPreviewDisplay(const sp<ISurface>& surface)
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
data.writeStrongBinder(surface->asBinder());
remote()->transact(SET_PREVIEW_DISPLAY, data, &reply);
return reply.readInt32();
}
// tell the service whether to callback with each preview frame
void setHasFrameCallback(bool installed)
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
data.writeInt32((int32_t)installed);
remote()->transact(SET_HAS_FRAME_CALLBACK, data, &reply);
}
// start preview mode, must call setPreviewDisplay first
status_t startPreview()
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(START_PREVIEW, data, &reply);
return reply.readInt32();
}
// stop preview mode
void stopPreview()
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(STOP_PREVIEW, data, &reply);
}
// auto focus
status_t autoFocus()
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(AUTO_FOCUS, data, &reply);
status_t ret = reply.readInt32();
return ret;
}
// take a picture - returns an IMemory (ref-counted mmap)
status_t takePicture()
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(TAKE_PICTURE, data, &reply);
status_t ret = reply.readInt32();
return ret;
}
// set preview/capture parameters - key/value pairs
status_t setParameters(const String8& params)
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
data.writeString8(params);
remote()->transact(SET_PARAMETERS, data, &reply);
return reply.readInt32();
}
// get preview/capture parameters - key/value pairs
String8 getParameters() const
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(GET_PARAMETERS, data, &reply);
return reply.readString8();
}
};
IMPLEMENT_META_INTERFACE(Camera, "android.hardware.ICamera");
// ----------------------------------------------------------------------
#define CHECK_INTERFACE(interface, data, reply) \
do { if (!data.enforceInterface(interface::getInterfaceDescriptor())) { \
LOGW("Call incorrectly routed to " #interface); \
return PERMISSION_DENIED; \
} } while (0)
status_t BnCamera::onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
switch(code) {
case DISCONNECT: {
CHECK_INTERFACE(ICamera, data, reply);
disconnect();
return NO_ERROR;
} break;
case SET_PREVIEW_DISPLAY: {
CHECK_INTERFACE(ICamera, data, reply);
sp<ISurface> surface = interface_cast<ISurface>(data.readStrongBinder());
reply->writeInt32(setPreviewDisplay(surface));
return NO_ERROR;
} break;
case SET_HAS_FRAME_CALLBACK: {
CHECK_INTERFACE(ICamera, data, reply);
bool installed = (bool)data.readInt32();
setHasFrameCallback(installed);
return NO_ERROR;
} break;
case START_PREVIEW: {
CHECK_INTERFACE(ICamera, data, reply);
reply->writeInt32(startPreview());
return NO_ERROR;
} break;
case STOP_PREVIEW: {
CHECK_INTERFACE(ICamera, data, reply);
stopPreview();
return NO_ERROR;
} break;
case AUTO_FOCUS: {
CHECK_INTERFACE(ICamera, data, reply);
reply->writeInt32(autoFocus());
return NO_ERROR;
} break;
case TAKE_PICTURE: {
CHECK_INTERFACE(ICamera, data, reply);
reply->writeInt32(takePicture());
return NO_ERROR;
} break;
case SET_PARAMETERS: {
CHECK_INTERFACE(ICamera, data, reply);
String8 params(data.readString8());
reply->writeInt32(setParameters(params));
return NO_ERROR;
} break;
case GET_PARAMETERS: {
CHECK_INTERFACE(ICamera, data, reply);
reply->writeString8(getParameters());
return NO_ERROR;
} break;
default:
return BBinder::onTransact(code, data, reply, flags);
}
}
// ----------------------------------------------------------------------------
}; // namespace android
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