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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* camera_proxy.cpp - Proxy to camera devices
*/
#include "camera_proxy.h"
#include <system/camera_metadata.h>
#include "log.h"
#include "message.h"
#include "utils.h"
#include "camera_device.h"
#include "thread_rpc.h"
using namespace libcamera;
LOG_DECLARE_CATEGORY(HAL);
/*
* \class CameraProxy
*
* The CameraProxy wraps a CameraDevice and implements the camera3_device_t
* API, bridging calls received from the camera framework to the CameraDevice.
*
* Bridging operation calls between the framework and the CameraDevice is
* required as the two run in two different threads and certain operations,
* such as queueing a new capture request to the camera, shall be called in
* the thread that dispatches events. Other operations do not require any
* bridging and resolve to direct function calls on the CameraDevice instance
* instead.
*/
static int hal_dev_initialize(const struct camera3_device *dev,
const camera3_callback_ops_t *callback_ops)
{
if (!dev)
return -EINVAL;
CameraProxy *proxy = reinterpret_cast<CameraProxy *>(dev->priv);
proxy->initialize(callback_ops);
return 0;
}
static int hal_dev_configure_streams(const struct camera3_device *dev,
camera3_stream_configuration_t *stream_list)
{
if (!dev)
return -EINVAL;
CameraProxy *proxy = reinterpret_cast<CameraProxy *>(dev->priv);
return proxy->configureStreams(stream_list);
}
static const camera_metadata_t *
hal_dev_construct_default_request_settings(const struct camera3_device *dev,
int type)
{
if (!dev)
return nullptr;
CameraProxy *proxy = reinterpret_cast<CameraProxy *>(dev->priv);
return proxy->constructDefaultRequestSettings(type);
}
static int hal_dev_process_capture_request(const struct camera3_device *dev,
camera3_capture_request_t *request)
{
if (!dev)
return -EINVAL;
CameraProxy *proxy = reinterpret_cast<CameraProxy *>(dev->priv);
return proxy->processCaptureRequest(request);
}
static void hal_dev_dump(const struct camera3_device *dev, int fd)
{
}
static int hal_dev_flush(const struct camera3_device *dev)
{
return 0;
}
static int hal_dev_close(hw_device_t *hw_device)
{
if (!hw_device)
return -EINVAL;
camera3_device_t *dev = reinterpret_cast<camera3_device_t *>(hw_device);
CameraProxy *proxy = reinterpret_cast<CameraProxy *>(dev->priv);
proxy->close();
return 0;
}
static camera3_device_ops hal_dev_ops = {
.initialize = hal_dev_initialize,
.configure_streams = hal_dev_configure_streams,
.register_stream_buffers = nullptr,
.construct_default_request_settings = hal_dev_construct_default_request_settings,
.process_capture_request = hal_dev_process_capture_request,
.get_metadata_vendor_tag_ops = nullptr,
.dump = hal_dev_dump,
.flush = hal_dev_flush,
.reserved = { nullptr },
};
CameraProxy::CameraProxy(unsigned int id, std::shared_ptr<Camera> camera)
: id_(id)
{
cameraDevice_ = new CameraDevice(id, camera);
}
CameraProxy::~CameraProxy()
{
delete cameraDevice_;
}
int CameraProxy::open(const hw_module_t *hardwareModule)
{
int ret = cameraDevice_->open();
if (ret)
return ret;
/* Initialize the hw_device_t in the instance camera3_module_t. */
camera3Device_.common.tag = HARDWARE_DEVICE_TAG;
camera3Device_.common.version = CAMERA_DEVICE_API_VERSION_3_3;
camera3Device_.common.module = (hw_module_t *)hardwareModule;
camera3Device_.common.close = hal_dev_close;
/*
* The camera device operations. These actually implement
* the Android Camera HALv3 interface.
*/
camera3Device_.ops = &hal_dev_ops;
camera3Device_.priv = this;
return 0;
}
void CameraProxy::close()
{
ThreadRpc rpcRequest;
rpcRequest.tag = ThreadRpc::Close;
threadRpcCall(rpcRequest);
}
void CameraProxy::initialize(const camera3_callback_ops_t *callbacks)
{
cameraDevice_->setCallbacks(callbacks);
}
const camera_metadata_t *CameraProxy::getStaticMetadata()
{
return cameraDevice_->getStaticMetadata();
}
const camera_metadata_t *CameraProxy::constructDefaultRequestSettings(int type)
{
return cameraDevice_->constructDefaultRequestSettings(type);
}
int CameraProxy::configureStreams(camera3_stream_configuration_t *stream_list)
{
return cameraDevice_->configureStreams(stream_list);
}
int CameraProxy::processCaptureRequest(camera3_capture_request_t *request)
{
ThreadRpc rpcRequest;
rpcRequest.tag = ThreadRpc::ProcessCaptureRequest;
rpcRequest.request = request;
threadRpcCall(rpcRequest);
return 0;
}
void CameraProxy::threadRpcCall(ThreadRpc &rpcRequest)
{
std::unique_ptr<ThreadRpcMessage> message =
utils::make_unique<ThreadRpcMessage>();
message->rpc = &rpcRequest;
cameraDevice_->postMessage(std::move(message));
rpcRequest.waitDelivery();
}
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