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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* camera_hal_manager.cpp - libcamera Android Camera Manager
*/
#include "camera_hal_manager.h"
#include <libcamera/camera.h>
#include "libcamera/internal/log.h"
#include "camera_device.h"
using namespace libcamera;
LOG_DECLARE_CATEGORY(HAL);
/*
* \class CameraHalManager
*
* The HAL camera manager is initializated at camera_module_t 'hal_init()' time
* and spawns its own thread where libcamera related events are dispatched to.
* It wraps the libcamera CameraManager operations and provides helpers for the
* camera_module_t operations, to retrieve the number of cameras in the system,
* their static information and to open camera devices.
*/
CameraHalManager::CameraHalManager()
: cameraManager_(nullptr)
{
}
CameraHalManager::~CameraHalManager()
{
cameras_.clear();
if (cameraManager_) {
cameraManager_->stop();
delete cameraManager_;
cameraManager_ = nullptr;
}
}
int CameraHalManager::init()
{
cameraManager_ = new CameraManager();
int ret = cameraManager_->start();
if (ret) {
LOG(HAL, Error) << "Failed to start camera manager: "
<< strerror(-ret);
delete cameraManager_;
cameraManager_ = nullptr;
return ret;
}
/*
* For each Camera registered in the system, a CameraDevice
* gets created here to wraps a libcamera Camera instance.
*
* \todo Support camera hotplug.
*/
unsigned int index = 0;
for (auto &cam : cameraManager_->cameras()) {
CameraDevice *camera = new CameraDevice(index, cam);
cameras_.emplace_back(camera);
++index;
}
return 0;
}
CameraDevice *CameraHalManager::open(unsigned int id,
const hw_module_t *hardwareModule)
{
if (id >= numCameras()) {
LOG(HAL, Error) << "Invalid camera id '" << id << "'";
return nullptr;
}
CameraDevice *camera = cameras_[id].get();
if (camera->open(hardwareModule))
return nullptr;
LOG(HAL, Info) << "Open camera '" << id << "'";
return camera;
}
unsigned int CameraHalManager::numCameras() const
{
return cameraManager_->cameras().size();
}
int CameraHalManager::getCameraInfo(unsigned int id, struct camera_info *info)
{
if (!info)
return -EINVAL;
if (id >= numCameras()) {
LOG(HAL, Error) << "Invalid camera id '" << id << "'";
return -EINVAL;
}
CameraDevice *camera = cameras_[id].get();
/* \todo Get these info dynamically inspecting the camera module. */
info->facing = id ? CAMERA_FACING_FRONT : CAMERA_FACING_BACK;
info->orientation = 0;
info->device_version = 0;
info->resource_cost = 0;
info->static_camera_characteristics = camera->getStaticMetadata();
info->conflicting_devices = nullptr;
info->conflicting_devices_length = 0;
return 0;
}
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