/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2020, Collabora Ltd. * Author: Nicolas Dufresne * * gstlibcameraprovider.c - GStreamer Device Provider */ #include "gstlibcameraprovider.h" #include #include #include "gstlibcamerasrc.h" #include "gstlibcamera-utils.h" using namespace libcamera; GST_DEBUG_CATEGORY_STATIC(provider_debug); #define GST_CAT_DEFAULT provider_debug /** * \struct _GstLibcameraDevice * \brief libcamera GstDevice implementation * * This object is used by GstLibcameraProvider to abstract a libcamera * device. It also provides helpers to create and configure the * libcamerasrc GstElement to be used with this device. The implementation is * private to the plugin. */ enum { PROP_DEVICE_NAME = 1, }; #define GST_TYPE_LIBCAMERA_DEVICE gst_libcamera_device_get_type() G_DECLARE_FINAL_TYPE(GstLibcameraDevice, gst_libcamera_device, GST_LIBCAMERA, DEVICE, GstDevice) struct _GstLibcameraDevice { GstDevice parent; gchar *name; }; G_DEFINE_TYPE(GstLibcameraDevice, gst_libcamera_device, GST_TYPE_DEVICE) static GstElement * gst_libcamera_device_create_element(GstDevice *device, const gchar *name) { GstElement *source = gst_element_factory_make("libcamerasrc", name); /* * Provider and source lives in the same plugin, so making the source * should never fail. */ g_assert(source); g_object_set(source, "camera-name", GST_LIBCAMERA_DEVICE(device)->name, nullptr); return source; } static gboolean gst_libcamera_device_reconfigure_element(GstDevice *device, GstElement *element) { if (!GST_LIBCAMERA_IS_SRC(element)) return FALSE; g_object_set(element, "camera-name", GST_LIBCAMERA_DEVICE(device)->name, nullptr); return TRUE; } static void gst_libcamera_device_set_property(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GstLibcameraDevice *device = GST_LIBCAMERA_DEVICE(object); switch (prop_id) { case PROP_DEVICE_NAME: device->name = g_value_dup_string(value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec); break; } } static void gst_libcamera_device_init([[maybe_unused]] GstLibcameraDevice *self) { } static void gst_libcamera_device_finalize(GObject *object) { GstLibcameraDevice *self = GST_LIBCAMERA_DEVICE(object); gpointer klass = gst_libcamera_device_parent_class; g_free(self->name); G_OBJECT_GET_CLASS(klass)->finalize(object); } static void gst_libcamera_device_class_init(GstLibcameraDeviceClass *klass) { GstDeviceClass *device_class = GST_DEVICE_CLASS(klass); GObjectClass *object_class = G_OBJECT_CLASS(klass); device_class->create_element = gst_libcamera_device_create_element; device_class->reconfigure_element = gst_libcamera_device_reconfigure_element; object_class->set_property = gst_libcamera_device_set_property; object_class->finalize = gst_libcamera_device_finalize; GParamSpec *pspec = g_param_spec_string("name", "Name", "The name of the camera device", "", (GParamFlags)(G_PARAM_STATIC_STRINGS | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY)); g_object_class_install_property(object_class, PROP_DEVICE_NAME, pspec); } static GstDevice * gst_libcamera_device_new(const std::shared_ptr &camera) { g_autoptr(GstCaps) caps = gst_caps_new_empty(); const gchar *name = camera->id().c_str(); StreamRoles roles; roles.push_back(StreamRole::VideoRecording); std::unique_ptr config = camera->generateConfiguration(roles); for (const StreamConfiguration &stream_cfg : *config) { GstCaps *sub_caps = gst_libcamera_stream_formats_to_caps(stream_cfg.formats()); if (sub_caps) gst_caps_append(caps, sub_caps); } return GST_DEVICE(g_object_new(GST_TYPE_LIBCAMERA_DEVICE, /* \todo Use a unique identifier instead of camera name. */ "name", name, "display-name", name, "caps", caps, "device-class", "Source/Video", nullptr)); } /** * \struct _GstLibcameraProvider * \brief libcamera GstDeviceProvider implementation * * This GstFeature is used by GstDeviceMonitor to probe the available * libcamera devices. The implementation is private to the plugin. */ struct _GstLibcameraProvider { GstDeviceProvider parent; CameraManager *cm; }; G_DEFINE_TYPE_WITH_CODE(GstLibcameraProvider, gst_libcamera_provider, GST_TYPE_DEVICE_PROVIDER, GST_DEBUG_CATEGORY_INIT(provider_debug, "libcamera-provider", 0, "libcamera Device Provider")) static GList * gst_libcamera_provider_probe(GstDeviceProvider *provider) { GstLibcameraProvider *self = GST_LIBCAMERA_PROVIDER(provider); CameraManager *cm = self->cm; GList *devices = nullptr; gint ret; GST_INFO_OBJECT(self, "Probing cameras using libcamera"); /* \todo Move the CameraMananger start()/stop() calls into * GstDeviceProvider start()/stop() virtual function when CameraMananger * gains monitoring support. Meanwhile we need to cycle start()/stop() * to ensure every probe() calls return the latest list. */ ret = cm->start(); if (ret) { GST_ERROR_OBJECT(self, "Failed to retrieve device list: %s", g_strerror(-ret)); return nullptr; } for (const std::shared_ptr &camera : cm->cameras()) { GST_INFO_OBJECT(self, "Found camera '%s'", camera->id().c_str()); devices = g_list_append(devices, g_object_ref_sink(gst_libcamera_device_new(camera))); } cm->stop(); return devices; } static void gst_libcamera_provider_init(GstLibcameraProvider *self) { GstDeviceProvider *provider = GST_DEVICE_PROVIDER(self); self->cm = new CameraManager(); /* Avoid devices being duplicated. */ gst_device_provider_hide_provider(provider, "v4l2deviceprovider"); } static void gst_libcamera_provider_finalize(GObject *object) { GstLibcameraProvider *self = GST_LIBCAMERA_PROVIDER(object); gpointer klass = gst_libcamera_provider_parent_class; delete self->cm; return G_OBJECT_GET_CLASS(klass)->finalize(object); } static void gst_libcamera_provider_class_init(GstLibcameraProviderClass *klass) { GstDeviceProviderClass *provider_class = GST_DEVICE_PROVIDER_CLASS(klass); GObjectClass *object_class = G_OBJECT_CLASS(klass); provider_class->probe = gst_libcamera_provider_probe; object_class->finalize = gst_libcamera_provider_finalize; gst_device_provider_class_set_metadata(provider_class, "libcamera Device Provider", "Source/Video", "List camera device using libcamera", "Nicolas Dufresne "); } ref='#n112'>112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191