camera/IProCameraUser.cpp - platform/frameworks/av - Git at Google

 /*
 **
 ** Copyright 2013, 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 "IProCameraUser"
 #include <utils/Log.h>
 #include <stdint.h>
 #include <sys/types.h>
 #include <binder/Parcel.h>
 #include <camera/IProCameraUser.h>
 #include <gui/IGraphicBufferProducer.h>
 #include <gui/Surface.h>
 #include <system/camera_metadata.h>

 namespace android {

 typedef Parcel::WritableBlob WritableBlob;
 typedef Parcel::ReadableBlob ReadableBlob;

 enum {
     DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
     CONNECT,
     EXCLUSIVE_TRY_LOCK,
     EXCLUSIVE_LOCK,
     EXCLUSIVE_UNLOCK,
     HAS_EXCLUSIVE_LOCK,
     SUBMIT_REQUEST,
     CANCEL_REQUEST,
     DELETE_STREAM,
     CREATE_STREAM,
     CREATE_DEFAULT_REQUEST,
     GET_CAMERA_INFO,
 };

 /**
   * Caller becomes the owner of the new metadata
   * 'const Parcel' doesnt prevent us from calling the read functions.
   *  which is interesting since it changes the internal state
   */
 void readMetadata(const Parcel& data, camera_metadata_t** out) {
     camera_metadata_t* metadata;

     // arg0 = metadataSize (int32)
     size_t metadataSize = static_cast<size_t>(data.readInt32());

     if (metadataSize == 0) {
         if (out) {
             *out = NULL;
         }
         return;
     }

     // NOTE: this doesn't make sense to me. shouldnt the blob
     // know how big it is? why do we have to specify the size
     // to Parcel::readBlob ?

     ReadableBlob blob;
     // arg1 = metadata (blob)
     {
         data.readBlob(metadataSize, &blob);
         const camera_metadata_t* tmp =
                        reinterpret_cast<const camera_metadata_t*>(blob.data());
         size_t entry_capacity = get_camera_metadata_entry_capacity(tmp);
         size_t data_capacity = get_camera_metadata_data_capacity(tmp);

         metadata = allocate_camera_metadata(entry_capacity, data_capacity);
         copy_camera_metadata(metadata, metadataSize, tmp);
     }
     blob.release();

     if (out) {
         *out = metadata;
     } else {
         free_camera_metadata(metadata);
     }
 }

 /**
   * Caller retains ownership of metadata
   * - Write 2 (int32 + blob) args in the current position
   */
 void writeMetadata(Parcel& data, camera_metadata_t* metadata) {
     // arg0 = metadataSize (int32)
     size_t metadataSize;

     if (metadata == NULL) {
         data.writeInt32(0);
         return;
     }

     metadataSize = get_camera_metadata_compact_size(metadata);
     data.writeInt32(static_cast<int32_t>(metadataSize));

     // arg1 = metadata (blob)
     WritableBlob blob;
     {
         data.writeBlob(metadataSize, &blob);
         copy_camera_metadata(blob.data(), metadataSize, metadata);
     }
     blob.release();
 }

 class BpProCameraUser: public BpInterface<IProCameraUser>
 {
 public:
     BpProCameraUser(const sp<IBinder>& impl)
         : BpInterface<IProCameraUser>(impl)
     {
     }

     // disconnect from camera service
     void disconnect()
     {
         ALOGV("disconnect");
         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
         remote()->transact(DISCONNECT, data, &reply);
     }

     virtual status_t connect(const sp<IProCameraCallbacks>& cameraClient)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
         data.writeStrongBinder(cameraClient->asBinder());
         remote()->transact(CONNECT, data, &reply);
         return reply.readInt32();
     }

     /* Shared ProCameraUser */

     virtual status_t exclusiveTryLock()
     {
         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
         remote()->transact(EXCLUSIVE_TRY_LOCK, data, &reply);
         return reply.readInt32();
     }
     virtual status_t exclusiveLock()
     {
         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
         remote()->transact(EXCLUSIVE_LOCK, data, &reply);
         return reply.readInt32();
     }

     virtual status_t exclusiveUnlock()
     {
         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
         remote()->transact(EXCLUSIVE_UNLOCK, data, &reply);
         return reply.readInt32();
     }

     virtual bool hasExclusiveLock()
     {
         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
         remote()->transact(HAS_EXCLUSIVE_LOCK, data, &reply);
         return !!reply.readInt32();
     }

     virtual int submitRequest(camera_metadata_t* metadata, bool streaming)
     {

         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());

         // arg0+arg1
         writeMetadata(data, metadata);

         // arg2 = streaming (bool)
         data.writeInt32(streaming);

         remote()->transact(SUBMIT_REQUEST, data, &reply);
         return reply.readInt32();
     }

     virtual status_t cancelRequest(int requestId)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
         data.writeInt32(requestId);

         remote()->transact(CANCEL_REQUEST, data, &reply);
         return reply.readInt32();
     }

     virtual status_t deleteStream(int streamId)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
         data.writeInt32(streamId);

         remote()->transact(DELETE_STREAM, data, &reply);
         return reply.readInt32();
     }

     virtual status_t createStream(int width, int height, int format,
                           const sp<IGraphicBufferProducer>& bufferProducer,
                           /*out*/
                           int* streamId)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
         data.writeInt32(width);
         data.writeInt32(height);
         data.writeInt32(format);

         sp<IBinder> b(bufferProducer->asBinder());
         data.writeStrongBinder(b);

         remote()->transact(CREATE_STREAM, data, &reply);

         int sId = reply.readInt32();
         if (streamId) {
             *streamId = sId;
         }
         return reply.readInt32();
     }

     // Create a request object from a template.
     virtual status_t createDefaultRequest(int templateId,
                                  /*out*/
                                   camera_metadata** request)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
         data.writeInt32(templateId);
         remote()->transact(CREATE_DEFAULT_REQUEST, data, &reply);
         readMetadata(reply, /*out*/request);
         return reply.readInt32();
     }


     virtual status_t getCameraInfo(int cameraId, camera_metadata** info)
     {
         Parcel data, reply;
         data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
         data.writeInt32(cameraId);
         remote()->transact(GET_CAMERA_INFO, data, &reply);
         readMetadata(reply, /*out*/info);
         return reply.readInt32();
     }


 private:


 };

 IMPLEMENT_META_INTERFACE(ProCameraUser, "android.hardware.IProCameraUser");

 // ----------------------------------------------------------------------

 status_t BnProCameraUser::onTransact(
     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
 {
     switch(code) {
         case DISCONNECT: {
             ALOGV("DISCONNECT");
             CHECK_INTERFACE(IProCameraUser, data, reply);
             disconnect();
             return NO_ERROR;
         } break;
         case CONNECT: {
             CHECK_INTERFACE(IProCameraUser, data, reply);
             sp<IProCameraCallbacks> cameraClient =
                    interface_cast<IProCameraCallbacks>(data.readStrongBinder());
             reply->writeInt32(connect(cameraClient));
             return NO_ERROR;
         } break;

         /* Shared ProCameraUser */
         case EXCLUSIVE_TRY_LOCK: {
             CHECK_INTERFACE(IProCameraUser, data, reply);
             reply->writeInt32(exclusiveTryLock());
             return NO_ERROR;
         } break;
         case EXCLUSIVE_LOCK: {
             CHECK_INTERFACE(IProCameraUser, data, reply);
             reply->writeInt32(exclusiveLock());
             return NO_ERROR;
         } break;
         case EXCLUSIVE_UNLOCK: {
             CHECK_INTERFACE(IProCameraUser, data, reply);
             reply->writeInt32(exclusiveUnlock());
             return NO_ERROR;
         } break;
         case HAS_EXCLUSIVE_LOCK: {
             CHECK_INTERFACE(IProCameraUser, data, reply);
             reply->writeInt32(hasExclusiveLock());
             return NO_ERROR;
         } break;
         case SUBMIT_REQUEST: {
             CHECK_INTERFACE(IProCameraUser, data, reply);
             camera_metadata_t* metadata;
             readMetadata(data, /*out*/&metadata);

             // arg2 = streaming (bool)
             bool streaming = data.readInt32();

             // return code: requestId (int32)
             reply->writeInt32(submitRequest(metadata, streaming));

             return NO_ERROR;
         } break;
         case CANCEL_REQUEST: {
             CHECK_INTERFACE(IProCameraUser, data, reply);
             int requestId = data.readInt32();
             reply->writeInt32(cancelRequest(requestId));
             return NO_ERROR;
         } break;
         case DELETE_STREAM: {
             CHECK_INTERFACE(IProCameraUser, data, reply);
             int streamId = data.readInt32();
             reply->writeInt32(deleteStream(streamId));
             return NO_ERROR;
         } break;
         case CREATE_STREAM: {
             CHECK_INTERFACE(IProCameraUser, data, reply);
             int width, height, format;

             width = data.readInt32();
             height = data.readInt32();
             format = data.readInt32();

             sp<IGraphicBufferProducer> bp =
                interface_cast<IGraphicBufferProducer>(data.readStrongBinder());

             int streamId = -1;
             status_t ret;
             ret = createStream(width, height, format, bp, &streamId);

             reply->writeInt32(streamId);
             reply->writeInt32(ret);

             return NO_ERROR;
         } break;

         case CREATE_DEFAULT_REQUEST: {
             CHECK_INTERFACE(IProCameraUser, data, reply);

             int templateId = data.readInt32();

             camera_metadata_t* request = NULL;
             status_t ret;
             ret = createDefaultRequest(templateId, &request);

             writeMetadata(*reply, request);
             reply->writeInt32(ret);

             free_camera_metadata(request);

             return NO_ERROR;
         } break;
         case GET_CAMERA_INFO: {
             CHECK_INTERFACE(IProCameraUser, data, reply);

             int cameraId = data.readInt32();

             camera_metadata_t* info = NULL;
             status_t ret;
             ret = getCameraInfo(cameraId, &info);

             writeMetadata(*reply, info);
             reply->writeInt32(ret);

             free_camera_metadata(info);

             return NO_ERROR;
         } break;
         default:
             return BBinder::onTransact(code, data, reply, flags);
     }
 }

 // ----------------------------------------------------------------------------

 }; // namespace android
	/*
	**
	** Copyright 2013, 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 "IProCameraUser"
	#include <utils/Log.h>
	#include <stdint.h>
	#include <sys/types.h>
	#include <binder/Parcel.h>
	#include <camera/IProCameraUser.h>
	#include <gui/IGraphicBufferProducer.h>
	#include <gui/Surface.h>
	#include <system/camera_metadata.h>

	namespace android {

	typedef Parcel::WritableBlob WritableBlob;
	typedef Parcel::ReadableBlob ReadableBlob;

	enum {
	DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
	CONNECT,
	EXCLUSIVE_TRY_LOCK,
	EXCLUSIVE_LOCK,
	EXCLUSIVE_UNLOCK,
	HAS_EXCLUSIVE_LOCK,
	SUBMIT_REQUEST,
	CANCEL_REQUEST,
	DELETE_STREAM,
	CREATE_STREAM,
	CREATE_DEFAULT_REQUEST,
	GET_CAMERA_INFO,
	};

	/**
	* Caller becomes the owner of the new metadata
	* 'const Parcel' doesnt prevent us from calling the read functions.
	* which is interesting since it changes the internal state
	*/
	void readMetadata(const Parcel& data, camera_metadata_t** out) {
	camera_metadata_t* metadata;

	// arg0 = metadataSize (int32)
	size_t metadataSize = static_cast<size_t>(data.readInt32());

	if (metadataSize == 0) {
	if (out) {
	*out = NULL;
	}
	return;
	}

	// NOTE: this doesn't make sense to me. shouldnt the blob
	// know how big it is? why do we have to specify the size
	// to Parcel::readBlob ?

	ReadableBlob blob;
	// arg1 = metadata (blob)
	{
	data.readBlob(metadataSize, &blob);
	const camera_metadata_t* tmp =
	reinterpret_cast<const camera_metadata_t*>(blob.data());
	size_t entry_capacity = get_camera_metadata_entry_capacity(tmp);
	size_t data_capacity = get_camera_metadata_data_capacity(tmp);

	metadata = allocate_camera_metadata(entry_capacity, data_capacity);
	copy_camera_metadata(metadata, metadataSize, tmp);
	}
	blob.release();

	if (out) {
	*out = metadata;
	} else {
	free_camera_metadata(metadata);
	}
	}

	/**
	* Caller retains ownership of metadata
	* - Write 2 (int32 + blob) args in the current position
	*/
	void writeMetadata(Parcel& data, camera_metadata_t* metadata) {
	// arg0 = metadataSize (int32)
	size_t metadataSize;

	if (metadata == NULL) {
	data.writeInt32(0);
	return;
	}

	metadataSize = get_camera_metadata_compact_size(metadata);
	data.writeInt32(static_cast<int32_t>(metadataSize));

	// arg1 = metadata (blob)
	WritableBlob blob;
	{
	data.writeBlob(metadataSize, &blob);
	copy_camera_metadata(blob.data(), metadataSize, metadata);
	}
	blob.release();
	}

	class BpProCameraUser: public BpInterface<IProCameraUser>
	{
	public:
	BpProCameraUser(const sp<IBinder>& impl)
	: BpInterface<IProCameraUser>(impl)
	{
	}

	// disconnect from camera service
	void disconnect()
	{
	ALOGV("disconnect");
	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
	remote()->transact(DISCONNECT, data, &reply);
	}

	virtual status_t connect(const sp<IProCameraCallbacks>& cameraClient)
	{
	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
	data.writeStrongBinder(cameraClient->asBinder());
	remote()->transact(CONNECT, data, &reply);
	return reply.readInt32();
	}

	/* Shared ProCameraUser */

	virtual status_t exclusiveTryLock()
	{
	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
	remote()->transact(EXCLUSIVE_TRY_LOCK, data, &reply);
	return reply.readInt32();
	}
	virtual status_t exclusiveLock()
	{
	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
	remote()->transact(EXCLUSIVE_LOCK, data, &reply);
	return reply.readInt32();
	}

	virtual status_t exclusiveUnlock()
	{
	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
	remote()->transact(EXCLUSIVE_UNLOCK, data, &reply);
	return reply.readInt32();
	}

	virtual bool hasExclusiveLock()
	{
	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
	remote()->transact(HAS_EXCLUSIVE_LOCK, data, &reply);
	return !!reply.readInt32();
	}

	virtual int submitRequest(camera_metadata_t* metadata, bool streaming)
	{

	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());

	// arg0+arg1
	writeMetadata(data, metadata);

	// arg2 = streaming (bool)
	data.writeInt32(streaming);

	remote()->transact(SUBMIT_REQUEST, data, &reply);
	return reply.readInt32();
	}

	virtual status_t cancelRequest(int requestId)
	{
	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
	data.writeInt32(requestId);

	remote()->transact(CANCEL_REQUEST, data, &reply);
	return reply.readInt32();
	}

	virtual status_t deleteStream(int streamId)
	{
	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
	data.writeInt32(streamId);

	remote()->transact(DELETE_STREAM, data, &reply);
	return reply.readInt32();
	}

	virtual status_t createStream(int width, int height, int format,
	const sp<IGraphicBufferProducer>& bufferProducer,
	/out/
	int* streamId)
	{
	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
	data.writeInt32(width);
	data.writeInt32(height);
	data.writeInt32(format);

	sp<IBinder> b(bufferProducer->asBinder());
	data.writeStrongBinder(b);

	remote()->transact(CREATE_STREAM, data, &reply);

	int sId = reply.readInt32();
	if (streamId) {
	*streamId = sId;
	}
	return reply.readInt32();
	}

	// Create a request object from a template.
	virtual status_t createDefaultRequest(int templateId,
	/out/
	camera_metadata** request)
	{
	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
	data.writeInt32(templateId);
	remote()->transact(CREATE_DEFAULT_REQUEST, data, &reply);
	readMetadata(reply, /out/request);
	return reply.readInt32();
	}


	virtual status_t getCameraInfo(int cameraId, camera_metadata** info)
	{
	Parcel data, reply;
	data.writeInterfaceToken(IProCameraUser::getInterfaceDescriptor());
	data.writeInt32(cameraId);
	remote()->transact(GET_CAMERA_INFO, data, &reply);
	readMetadata(reply, /out/info);
	return reply.readInt32();
	}


	private:


	};

	IMPLEMENT_META_INTERFACE(ProCameraUser, "android.hardware.IProCameraUser");

	// ----------------------------------------------------------------------

	status_t BnProCameraUser::onTransact(
	uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
	{
	switch(code) {
	case DISCONNECT: {
	ALOGV("DISCONNECT");
	CHECK_INTERFACE(IProCameraUser, data, reply);
	disconnect();
	return NO_ERROR;
	} break;
	case CONNECT: {
	CHECK_INTERFACE(IProCameraUser, data, reply);
	sp<IProCameraCallbacks> cameraClient =
	interface_cast<IProCameraCallbacks>(data.readStrongBinder());
	reply->writeInt32(connect(cameraClient));
	return NO_ERROR;
	} break;

	/* Shared ProCameraUser */
	case EXCLUSIVE_TRY_LOCK: {
	CHECK_INTERFACE(IProCameraUser, data, reply);
	reply->writeInt32(exclusiveTryLock());
	return NO_ERROR;
	} break;
	case EXCLUSIVE_LOCK: {
	CHECK_INTERFACE(IProCameraUser, data, reply);
	reply->writeInt32(exclusiveLock());
	return NO_ERROR;
	} break;
	case EXCLUSIVE_UNLOCK: {
	CHECK_INTERFACE(IProCameraUser, data, reply);
	reply->writeInt32(exclusiveUnlock());
	return NO_ERROR;
	} break;
	case HAS_EXCLUSIVE_LOCK: {
	CHECK_INTERFACE(IProCameraUser, data, reply);
	reply->writeInt32(hasExclusiveLock());
	return NO_ERROR;
	} break;
	case SUBMIT_REQUEST: {
	CHECK_INTERFACE(IProCameraUser, data, reply);
	camera_metadata_t* metadata;
	readMetadata(data, /out/&metadata);

	// arg2 = streaming (bool)
	bool streaming = data.readInt32();

	// return code: requestId (int32)
	reply->writeInt32(submitRequest(metadata, streaming));

	return NO_ERROR;
	} break;
	case CANCEL_REQUEST: {
	CHECK_INTERFACE(IProCameraUser, data, reply);
	int requestId = data.readInt32();
	reply->writeInt32(cancelRequest(requestId));
	return NO_ERROR;
	} break;
	case DELETE_STREAM: {
	CHECK_INTERFACE(IProCameraUser, data, reply);
	int streamId = data.readInt32();
	reply->writeInt32(deleteStream(streamId));
	return NO_ERROR;
	} break;
	case CREATE_STREAM: {
	CHECK_INTERFACE(IProCameraUser, data, reply);
	int width, height, format;

	width = data.readInt32();
	height = data.readInt32();
	format = data.readInt32();

	sp<IGraphicBufferProducer> bp =
	interface_cast<IGraphicBufferProducer>(data.readStrongBinder());

	int streamId = -1;
	status_t ret;
	ret = createStream(width, height, format, bp, &streamId);

	reply->writeInt32(streamId);
	reply->writeInt32(ret);

	return NO_ERROR;
	} break;

	case CREATE_DEFAULT_REQUEST: {
	CHECK_INTERFACE(IProCameraUser, data, reply);

	int templateId = data.readInt32();

	camera_metadata_t* request = NULL;
	status_t ret;
	ret = createDefaultRequest(templateId, &request);

	writeMetadata(*reply, request);
	reply->writeInt32(ret);

	free_camera_metadata(request);

	return NO_ERROR;
	} break;
	case GET_CAMERA_INFO: {
	CHECK_INTERFACE(IProCameraUser, data, reply);

	int cameraId = data.readInt32();

	camera_metadata_t* info = NULL;
	status_t ret;
	ret = getCameraInfo(cameraId, &info);

	writeMetadata(*reply, info);
	reply->writeInt32(ret);

	free_camera_metadata(info);

	return NO_ERROR;
	} break;
	default:
	return BBinder::onTransact(code, data, reply, flags);
	}
	}

	// ----------------------------------------------------------------------------

	}; // namespace android