/* 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 #include #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), callbacks_(nullptr), numInternalCameras_(0), nextExternalCameraId_(firstExternalCameraId_) { } CameraHalManager::~CameraHalManager() { cameras_.clear(); if (cameraManager_) { cameraManager_->stop(); delete cameraManager_; cameraManager_ = nullptr; } } int CameraHalManager::init() { cameraManager_ = new CameraManager(); /* Support camera hotplug. */ cameraManager_->cameraAdded.connect(this, &CameraHalManager::cameraAdded); cameraManager_->cameraRemoved.connect(this, &CameraHalManager::cameraRemoved); int ret = cameraManager_->start(); if (ret) { LOG(HAL, Error) << "Failed to start camera manager: " << strerror(-ret); delete cameraManager_; cameraManager_ = nullptr; return ret; } return 0; } CameraDevice *CameraHalManager::open(unsigned int id, const hw_module_t *hardwareModule) { MutexLocker locker(mutex_); if (!callbacks_) { LOG(HAL, Error) << "Can't open camera before callbacks are set"; return nullptr; } CameraDevice *camera = cameraDeviceFromHalId(id); if (!camera) { LOG(HAL, Error) << "Invalid camera id '" << id << "'"; return nullptr; } if (camera->open(hardwareModule)) return nullptr; LOG(HAL, Info) << "Open camera '" << id << "'"; return camera; } void CameraHalManager::cameraAdded(std::shared_ptr cam) { unsigned int id; bool isCameraExternal = false; bool isCameraNew = false; MutexLocker locker(mutex_); /* * Each camera is assigned a unique integer ID when it is seen for the * first time. If the camera has been seen before, the previous ID is * re-used. * * IDs starts from '0' for internal cameras and '1000' for external * cameras. */ auto iter = cameraIdsMap_.find(cam->id()); if (iter != cameraIdsMap_.end()) { id = iter->second; } else { isCameraNew = true; /* * Now check if this is an external camera and assign * its id accordingly. */ if (cameraLocation(cam.get()) == properties::CameraLocationExternal) { isCameraExternal = true; id = nextExternalCameraId_; } else { id = numInternalCameras_; } } /* Create a CameraDevice instance to wrap the libcamera Camera. */ std::shared_ptr camera = CameraDevice::create(id, std::move(cam)); int ret = camera->initialize(); if (ret) { LOG(HAL, Error) << "Failed to initialize camera: " << cam->id(); return; } if (isCameraNew) { cameraIdsMap_.emplace(cam->id(), id); if (isCameraExternal) nextExternalCameraId_++; else numInternalCameras_++; } cameras_.emplace_back(std::move(camera)); if (callbacks_) callbacks_->camera_device_status_change(callbacks_, id, CAMERA_DEVICE_STATUS_PRESENT); LOG(HAL, Debug) << "Camera ID: " << id << " added successfully."; } void CameraHalManager::cameraRemoved(std::shared_ptr cam) { MutexLocker locker(mutex_); auto iter = std::find_if(cameras_.begin(), cameras_.end(), [&cam](std::shared_ptr &camera) { return cam.get() == camera->camera(); }); if (iter == cameras_.end()) return; /* * CAMERA_DEVICE_STATUS_NOT_PRESENT should be set for external cameras * only. */ unsigned int id = (*iter)->id(); if (id >= firstExternalCameraId_) callbacks_->camera_device_status_change(callbacks_, id, CAMERA_DEVICE_STATUS_NOT_PRESENT); /* * \todo Check if the camera is already open and running. * Inform the framework about its absence before deleting its * reference here. */ cameras_.erase(iter); LOG(HAL, Debug) << "Camera ID: " << id << " removed successfully."; } int32_t CameraHalManager::cameraLocation(const Camera *cam) { const ControlList &properties = cam->properties(); if (!properties.contains(properties::Location)) return -1; return properties.get(properties::Location); } CameraDevice *CameraHalManager::cameraDeviceFromHalId(unsigned int id) { auto iter = std::find_if(cameras_.begin(), cameras_.end(), [id](std::shared_ptr &camera) { return camera->id() == id; }); if (iter == cameras_.end()) return nullptr; return iter->get(); } unsigned int CameraHalManager::numCameras() const { return numInternalCameras_; } int CameraHalManager::getCameraInfo(unsigned int id, struct camera_info *info) { if (!info) return -EINVAL; MutexLocker locker(mutex_); CameraDevice *camera = cameraDeviceFromHalId(id); if (!camera) { LOG(HAL, Error) << "Invalid camera id '" << id << "'"; return -EINVAL; } info->facing = camera->facing(); info->orientation = camera->orientation(); info->device_version = CAMERA_DEVICE_API_VERSION_3_3; info->resource_cost = 0; info->static_camera_characteristics = camera->getStaticMetadata(); info->conflicting_devices = nullptr; info->conflicting_devices_length = 0; return 0; } void CameraHalManager::setCallbacks(const camera_module_callbacks_t *callbacks) { callbacks_ = callbacks; MutexLocker locker(mutex_); /* * Some external cameras may have been identified before the callbacks_ * were set. Iterate all existing external cameras and mark them as * CAMERA_DEVICE_STATUS_PRESENT explicitly. * * Internal cameras are already assumed to be present at module load * time by the Android framework. */ for (std::shared_ptr &camera : cameras_) { unsigned int id = camera->id(); if (id >= firstExternalCameraId_) callbacks_->camera_device_status_change(callbacks_, id, CAMERA_DEVICE_STATUS_PRESENT); } } 'n108' href='#n108'>108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150

# SPDX-License-Identifier: CC0-1.0

libcamera_sources = files([
    'bound_method.cpp',
    'buffer.cpp',
    'byte_stream_buffer.cpp',
    'camera.cpp',
    'camera_controls.cpp',
    'camera_manager.cpp',
    'camera_sensor.cpp',
    'controls.cpp',
    'control_serializer.cpp',
    'control_validator.cpp',
    'device_enumerator.cpp',
    'device_enumerator_sysfs.cpp',
    'event_dispatcher.cpp',
    'event_dispatcher_poll.cpp',
    'event_notifier.cpp',
    'file.cpp',
    'file_descriptor.cpp',
    'formats.cpp',
    'framebuffer_allocator.cpp',
    'geometry.cpp',
    'ipa_context_wrapper.cpp',
    'ipa_controls.cpp',
    'ipa_interface.cpp',
    'ipa_manager.cpp',
    'ipa_module.cpp',
    'ipa_proxy.cpp',
    'ipc_unixsocket.cpp',
    'log.cpp',
    'media_device.cpp',
    'media_object.cpp',
    'message.cpp',
    'object.cpp',
    'pipeline_handler.cpp',
    'pixel_format.cpp',
    'process.cpp',
    'pub_key.cpp',
    'request.cpp',
    'semaphore.cpp',
    'signal.cpp',
    'stream.cpp',
    'sysfs.cpp',
    'thread.cpp',
    'timer.cpp',
    'transform.cpp',
    'utils.cpp',
    'v4l2_controls.cpp',
    'v4l2_device.cpp',
    'v4l2_pixelformat.cpp',
    'v4l2_subdevice.cpp',
    'v4l2_videodevice.cpp',
])

libcamera_sources += libcamera_public_headers

includes = [
    libcamera_includes,
]

subdir('pipeline')
subdir('proxy')

libatomic = cc.find_library('atomic', required : false)
libdl = cc.find_library('dl')
libgnutls = cc.find_library('gnutls', required : true)
libudev = dependency('libudev', required : false)

if libgnutls.found()
    config_h.set('HAVE_GNUTLS', 1)
endif

if libudev.found()
    config_h.set('HAVE_LIBUDEV', 1)
    libcamera_sources += files([
        'device_enumerator_udev.cpp',
    ])
endif

control_sources = []

foreach source : control_source_files
    input_files = files(source +'.yaml', source + '.cpp.in')
    control_sources += custom_target(source + '_cpp',
                                     input : input_files,
                                     output : source + '.cpp',
                                     depend_files : gen_controls,
                                     command : [gen_controls, '-o', '@OUTPUT@', '@INPUT@'])
endforeach

libcamera_sources += control_sources

gen_version = join_paths(meson.source_root(), 'utils', 'gen-version.sh')

version_cpp = vcs_tag(command : [gen_version, meson.build_root()],
                      input : 'version.cpp.in',
                      output : 'version.cpp',
                      fallback : meson.project_version())

libcamera_sources += version_cpp

if ipa_sign_module
    ipa_pub_key_cpp = custom_target('ipa_pub_key_cpp',
                                    input : [ ipa_priv_key, 'ipa_pub_key.cpp.in' ],
                                    output : 'ipa_pub_key.cpp',
                                    command : [ gen_ipa_pub_key, '@INPUT@', '@OUTPUT@' ])

    libcamera_sources += ipa_pub_key_cpp
endif

libcamera_deps = [
    libatomic,
    libdl,
    libgnutls,
    libudev,
    dependency('threads'),
]

libcamera_link_with = []

if android_enabled
    libcamera_sources += android_hal_sources
    includes += android_includes
    libcamera_link_with += android_camera_metadata

    libcamera_deps += android_deps