1 files changed, 332 insertions, 0 deletions
diff --git a/spa/plugins/libcamera/libcamera-device.cpp b/spa/plugins/libcamera/libcamera-device.cpp
new file mode 100644
index 0000000..ff206a4
--- /dev/null
+++ b/spa/plugins/libcamera/libcamera-device.cpp
@@ -0,0 +1,332 @@
+/* Spa libcamera Device
+ *
+ * Copyright (C) 2020, Collabora Ltd.
+ *     Author: Raghavendra Rao Sidlagatta <raghavendra.rao@collabora.com>
+ * Copyright (C) 2021 Wim Taymans <wim.taymans@gmail.com>
+ *
+ * libcamera-device.cpp
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stddef.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include <sys/ioctl.h>
+
+#include <spa/support/plugin.h>
+#include <spa/support/log.h>
+#include <spa/support/loop.h>
+#include <spa/utils/keys.h>
+#include <spa/utils/result.h>
+#include <spa/utils/names.h>
+#include <spa/utils/string.h>
+#include <spa/node/node.h>
+#include <spa/pod/builder.h>
+#include <spa/monitor/device.h>
+#include <spa/monitor/utils.h>
+#include <spa/param/param.h>
+
+#include "libcamera.h"
+#include "libcamera-manager.hpp"
+
+#include <libcamera/camera.h>
+#include <libcamera/property_ids.h>
+
+using namespace libcamera;
+
+namespace {
+
+struct impl {
+	struct spa_handle handle;
+	struct spa_device device = {};
+
+	struct spa_log *log;
+
+	std::string device_id;
+
+	struct spa_hook_list hooks;
+
+	std::shared_ptr<CameraManager> manager;
+	std::shared_ptr<Camera> camera;
+
+	impl(spa_log *log,
+	     std::shared_ptr<CameraManager> manager,
+	     std::shared_ptr<Camera> camera,
+	     std::string device_id);
+};
+
+}
+
+static std::string cameraModel(const Camera *camera)
+{
+	const ControlList &props = camera->properties();
+
+	if (auto model = props.get(properties::Model))
+		return std::move(model.value());
+
+	return camera->id();
+}
+
+static const char *cameraLoc(const Camera *camera)
+{
+	const ControlList &props = camera->properties();
+
+	if (auto location = props.get(properties::Location)) {
+		switch (location.value()) {
+		case properties::CameraLocationFront:
+			return "front";
+		case properties::CameraLocationBack:
+			return "back";
+		case properties::CameraLocationExternal:
+			return "external";
+		}
+	}
+
+	return nullptr;
+}
+
+static int emit_info(struct impl *impl, bool full)
+{
+	struct spa_dict_item items[10];
+	struct spa_dict dict;
+	uint32_t n_items = 0;
+	struct spa_device_info info;
+	struct spa_param_info params[2];
+	char path[256], model[256], name[256];
+
+	info = SPA_DEVICE_INFO_INIT();
+
+	info.change_mask = SPA_DEVICE_CHANGE_MASK_PROPS;
+
+#define ADD_ITEM(key, value) items[n_items++] = SPA_DICT_ITEM_INIT(key, value)
+	snprintf(path, sizeof(path), "libcamera:%s", impl->device_id.c_str());
+	ADD_ITEM(SPA_KEY_OBJECT_PATH, path);
+	ADD_ITEM(SPA_KEY_DEVICE_API, "libcamera");
+	ADD_ITEM(SPA_KEY_MEDIA_CLASS, "Video/Device");
+	ADD_ITEM(SPA_KEY_API_LIBCAMERA_PATH, impl->device_id.c_str());
+
+	if (auto location = cameraLoc(impl->camera.get()))
+		ADD_ITEM(SPA_KEY_API_LIBCAMERA_LOCATION, location);
+
+	snprintf(model, sizeof(model), "%s", cameraModel(impl->camera.get()).c_str());
+	ADD_ITEM(SPA_KEY_DEVICE_PRODUCT_NAME, model);
+	ADD_ITEM(SPA_KEY_DEVICE_DESCRIPTION, model);
+	snprintf(name, sizeof(name), "libcamera_device.%s", impl->device_id.c_str());
+	ADD_ITEM(SPA_KEY_DEVICE_NAME, name);
+#undef ADD_ITEM
+
+	dict = SPA_DICT_INIT(items, n_items);
+	info.props = &dict;
+
+	info.change_mask |= SPA_DEVICE_CHANGE_MASK_PARAMS;
+	params[0] = SPA_PARAM_INFO(SPA_PARAM_EnumProfile, SPA_PARAM_INFO_READ);
+	params[1] = SPA_PARAM_INFO(SPA_PARAM_Profile, SPA_PARAM_INFO_WRITE);
+	info.n_params = SPA_N_ELEMENTS(params);
+	info.params = params;
+
+	spa_device_emit_info(&impl->hooks, &info);
+
+	if (true) {
+		struct spa_device_object_info oinfo;
+
+		oinfo = SPA_DEVICE_OBJECT_INFO_INIT();
+		oinfo.type = SPA_TYPE_INTERFACE_Node;
+		oinfo.factory_name = SPA_NAME_API_LIBCAMERA_SOURCE;
+		oinfo.change_mask = SPA_DEVICE_OBJECT_CHANGE_MASK_PROPS;
+		oinfo.props = &dict;
+
+		spa_device_emit_object_info(&impl->hooks, 0, &oinfo);
+	}
+	return 0;
+}
+
+static int impl_add_listener(void *object,
+			struct spa_hook *listener,
+			const struct spa_device_events *events,
+			void *data)
+{
+	struct impl *impl = (struct impl*)object;
+	struct spa_hook_list save;
+	int res = 0;
+
+	spa_return_val_if_fail(impl != NULL, -EINVAL);
+	spa_return_val_if_fail(events != NULL, -EINVAL);
+
+	spa_hook_list_isolate(&impl->hooks, &save, listener, events, data);
+
+	if (events->info || events->object_info)
+		res = emit_info(impl, true);
+
+	spa_hook_list_join(&impl->hooks, &save);
+
+	return res;
+}
+
+static int impl_sync(void *object, int seq)
+{
+	struct impl *impl = (struct impl*) object;
+
+	spa_return_val_if_fail(impl != NULL, -EINVAL);
+
+	spa_device_emit_result(&impl->hooks, seq, 0, 0, NULL);
+
+	return 0;
+}
+
+static int impl_enum_params(void *object, int seq,
+			    uint32_t id, uint32_t start, uint32_t num,
+			    const struct spa_pod *filter)
+{
+	return -ENOTSUP;
+}
+
+static int impl_set_param(void *object,
+			  uint32_t id, uint32_t flags,
+			  const struct spa_pod *param)
+{
+	return -ENOTSUP;
+}
+
+static const struct spa_device_methods impl_device = {
+	SPA_VERSION_DEVICE_METHODS,
+	.add_listener = impl_add_listener,
+	.sync = impl_sync,
+	.enum_params = impl_enum_params,
+	.set_param = impl_set_param,
+};
+
+static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
+{
+	struct impl *impl;
+
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+	spa_return_val_if_fail(interface != NULL, -EINVAL);
+
+	impl = (struct impl *) handle;
+
+	if (spa_streq(type, SPA_TYPE_INTERFACE_Device))
+		*interface = &impl->device;
+	else
+		return -ENOENT;
+
+	return 0;
+}
+
+static int impl_clear(struct spa_handle *handle)
+{
+	std::destroy_at(reinterpret_cast<impl *>(handle));
+	return 0;
+}
+
+impl::impl(spa_log *log,
+	   std::shared_ptr<CameraManager> manager,
+	   std::shared_ptr<Camera> camera,
+	   std::string device_id)
+	: handle({ SPA_VERSION_HANDLE, impl_get_interface, impl_clear }),
+	  log(log),
+	  device_id(std::move(device_id)),
+	  manager(std::move(manager)),
+	  camera(std::move(camera))
+{
+	libcamera_log_topic_init(log);
+
+	spa_hook_list_init(&hooks);
+
+	device.iface = SPA_INTERFACE_INIT(
+			SPA_TYPE_INTERFACE_Device,
+			SPA_VERSION_DEVICE,
+			&impl_device, this);
+}
+
+static size_t
+impl_get_size(const struct spa_handle_factory *factory,
+	      const struct spa_dict *params)
+{
+	return sizeof(struct impl);
+}
+
+static int
+impl_init(const struct spa_handle_factory *factory,
+	  struct spa_handle *handle,
+	  const struct spa_dict *info,
+	  const struct spa_support *support,
+	  uint32_t n_support)
+{
+	const char *str;
+	int res;
+
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+
+	auto log = static_cast<spa_log *>(spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log));
+
+	auto manager = libcamera_manager_acquire(res);
+	if (!manager) {
+		spa_log_error(log, "can't start camera manager: %s", spa_strerror(res));
+		return res;
+	}
+
+	std::string device_id;
+	if (info && (str = spa_dict_lookup(info, SPA_KEY_API_LIBCAMERA_PATH)))
+		device_id = str;
+
+	auto camera = manager->get(device_id);
+	if (!camera) {
+		spa_log_error(log, "unknown camera id %s", device_id.c_str());
+		return -ENOENT;
+	}
+
+	new (handle) impl(log, std::move(manager), std::move(camera), std::move(device_id));
+
+	return 0;
+}
+
+static const struct spa_interface_info impl_interfaces[] = {
+	{SPA_TYPE_INTERFACE_Device,},
+};
+
+static int impl_enum_interface_info(const struct spa_handle_factory *factory,
+				    const struct spa_interface_info **info,
+				    uint32_t *index)
+{
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(info != NULL, -EINVAL);
+	spa_return_val_if_fail(index != NULL, -EINVAL);
+
+	if (*index >= SPA_N_ELEMENTS(impl_interfaces))
+		return 0;
+
+	*info = &impl_interfaces[(*index)++];
+	return 1;
+}
+
+extern "C" {
+const struct spa_handle_factory spa_libcamera_device_factory = {
+	SPA_VERSION_HANDLE_FACTORY,
+	SPA_NAME_API_LIBCAMERA_DEVICE,
+	NULL,
+	impl_get_size,
+	impl_init,
+	impl_enum_interface_info,
+};
+}