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replicant-frameworks_native/libs/ui/ICamera.cpp
Mathias Agopian 83c0446f27 some work to try to reduce the code size of some native libraries 
- make sure that all binder Bn classes define a ctor and dtor in their respective library.
  This avoids duplication of the ctor/dtor in libraries where these objects are instantiated.
  This is also cleaner, should we want these ctor/dtor to do something one day.

- same change as above for some Bp classes and various other non-binder classes

- moved the definition of CHECK_INTERFACE() in IInterface.h instead of having it everywhere.

- improved the CHECK_INTERFACE() macro so it calls a single method in Parcel, instead of inlining its code everywhere

- IBinder::getInterfaceDescriptor() now returns a "const String16&" instead of String16, which saves calls to String16 and ~String16

- implemented a cache for BpBinder::getInterfaceDescriptor(), since this does an IPC. HOWEVER, this method never seems to be called.
  The cache makes BpBinder bigger, so we need to figure out if we need this method at all.
2009-05-26 16:12:20 -07:00

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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 "ICamera"
#include <utils/Log.h>
#include <stdint.h>
#include <sys/types.h>
#include <binder/Parcel.h>
#include <ui/ICamera.h>
namespace android {
enum {
DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
SET_PREVIEW_DISPLAY,
SET_PREVIEW_CALLBACK_FLAG,
START_PREVIEW,
STOP_PREVIEW,
AUTO_FOCUS,
TAKE_PICTURE,
SET_PARAMETERS,
GET_PARAMETERS,
CONNECT,
LOCK,
UNLOCK,
PREVIEW_ENABLED,
START_RECORDING,
STOP_RECORDING,
RECORDING_ENABLED,
RELEASE_RECORDING_FRAME,
};
class BpCamera: public BpInterface<ICamera>
{
public:
BpCamera(const sp<IBinder>& impl)
: BpInterface<ICamera>(impl)
{
}
// disconnect from camera service
void disconnect()
{
LOGV("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)
{
LOGV("setPreviewDisplay");
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
data.writeStrongBinder(surface->asBinder());
remote()->transact(SET_PREVIEW_DISPLAY, data, &reply);
return reply.readInt32();
}
// set the preview callback flag to affect how the received frames from
// preview are handled. See Camera.h for details.
void setPreviewCallbackFlag(int flag)
{
LOGV("setPreviewCallbackFlag(%d)", flag);
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
data.writeInt32(flag);
remote()->transact(SET_PREVIEW_CALLBACK_FLAG, data, &reply);
}
// start preview mode, must call setPreviewDisplay first
status_t startPreview()
{
LOGV("startPreview");
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(START_PREVIEW, data, &reply);
return reply.readInt32();
}
// start recording mode, must call setPreviewDisplay first
status_t startRecording()
{
LOGV("startRecording");
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(START_RECORDING, data, &reply);
return reply.readInt32();
}
// stop preview mode
void stopPreview()
{
LOGV("stopPreview");
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(STOP_PREVIEW, data, &reply);
}
// stop recording mode
void stopRecording()
{
LOGV("stopRecording");
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(STOP_RECORDING, data, &reply);
}
void releaseRecordingFrame(const sp<IMemory>& mem)
{
LOGV("releaseRecordingFrame");
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
data.writeStrongBinder(mem->asBinder());
remote()->transact(RELEASE_RECORDING_FRAME, data, &reply);
}
// check preview state
bool previewEnabled()
{
LOGV("previewEnabled");
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(PREVIEW_ENABLED, data, &reply);
return reply.readInt32();
}
// check recording state
bool recordingEnabled()
{
LOGV("recordingEnabled");
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(RECORDING_ENABLED, data, &reply);
return reply.readInt32();
}
// auto focus
status_t autoFocus()
{
LOGV("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()
{
LOGV("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)
{
LOGV("setParameters");
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
{
LOGV("getParameters");
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(GET_PARAMETERS, data, &reply);
return reply.readString8();
}
virtual status_t connect(const sp<ICameraClient>& cameraClient)
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
data.writeStrongBinder(cameraClient->asBinder());
remote()->transact(CONNECT, data, &reply);
return reply.readInt32();
}
virtual status_t lock()
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(LOCK, data, &reply);
return reply.readInt32();
}
virtual status_t unlock()
{
Parcel data, reply;
data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
remote()->transact(UNLOCK, data, &reply);
return reply.readInt32();
}
};
IMPLEMENT_META_INTERFACE(Camera, "android.hardware.ICamera");
// ----------------------------------------------------------------------
status_t BnCamera::onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
switch(code) {
case DISCONNECT: {
LOGV("DISCONNECT");
CHECK_INTERFACE(ICamera, data, reply);
disconnect();
return NO_ERROR;
} break;
case SET_PREVIEW_DISPLAY: {
LOGV("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_PREVIEW_CALLBACK_FLAG: {
LOGV("SET_PREVIEW_CALLBACK_TYPE");
CHECK_INTERFACE(ICamera, data, reply);
int callback_flag = data.readInt32();
setPreviewCallbackFlag(callback_flag);
return NO_ERROR;
} break;
case START_PREVIEW: {
LOGV("START_PREVIEW");
CHECK_INTERFACE(ICamera, data, reply);
reply->writeInt32(startPreview());
return NO_ERROR;
} break;
case START_RECORDING: {
LOGV("START_RECORDING");
CHECK_INTERFACE(ICamera, data, reply);
reply->writeInt32(startRecording());
return NO_ERROR;
} break;
case STOP_PREVIEW: {
LOGV("STOP_PREVIEW");
CHECK_INTERFACE(ICamera, data, reply);
stopPreview();
return NO_ERROR;
} break;
case STOP_RECORDING: {
LOGV("STOP_RECORDING");
CHECK_INTERFACE(ICamera, data, reply);
stopRecording();
return NO_ERROR;
} break;
case RELEASE_RECORDING_FRAME: {
LOGV("RELEASE_RECORDING_FRAME");
CHECK_INTERFACE(ICamera, data, reply);
sp<IMemory> mem = interface_cast<IMemory>(data.readStrongBinder());
releaseRecordingFrame(mem);
return NO_ERROR;
} break;
case PREVIEW_ENABLED: {
LOGV("PREVIEW_ENABLED");
CHECK_INTERFACE(ICamera, data, reply);
reply->writeInt32(previewEnabled());
return NO_ERROR;
} break;
case RECORDING_ENABLED: {
LOGV("RECORDING_ENABLED");
CHECK_INTERFACE(ICamera, data, reply);
reply->writeInt32(recordingEnabled());
return NO_ERROR;
} break;
case AUTO_FOCUS: {
LOGV("AUTO_FOCUS");
CHECK_INTERFACE(ICamera, data, reply);
reply->writeInt32(autoFocus());
return NO_ERROR;
} break;
case TAKE_PICTURE: {
LOGV("TAKE_PICTURE");
CHECK_INTERFACE(ICamera, data, reply);
reply->writeInt32(takePicture());
return NO_ERROR;
} break;
case SET_PARAMETERS: {
LOGV("SET_PARAMETERS");
CHECK_INTERFACE(ICamera, data, reply);
String8 params(data.readString8());
reply->writeInt32(setParameters(params));
return NO_ERROR;
} break;
case GET_PARAMETERS: {
LOGV("GET_PARAMETERS");
CHECK_INTERFACE(ICamera, data, reply);
reply->writeString8(getParameters());
return NO_ERROR;
} break;
case CONNECT: {
CHECK_INTERFACE(ICamera, data, reply);
sp<ICameraClient> cameraClient = interface_cast<ICameraClient>(data.readStrongBinder());
reply->writeInt32(connect(cameraClient));
return NO_ERROR;
} break;
case LOCK: {
CHECK_INTERFACE(ICamera, data, reply);
reply->writeInt32(lock());
return NO_ERROR;
} break;
case UNLOCK: {
CHECK_INTERFACE(ICamera, data, reply);
reply->writeInt32(unlock());
return NO_ERROR;
} break;
default:
return BBinder::onTransact(code, data, reply, flags);
}
}
// ----------------------------------------------------------------------------
}; // namespace android
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