1 files changed, 247 insertions, 0 deletions
diff --git a/spa/plugins/libcamera/libcamera-client.c b/spa/plugins/libcamera/libcamera-client.c
new file mode 100644
index 0000000..a31a41f
--- /dev/null
+++ b/spa/plugins/libcamera/libcamera-client.c
@@ -0,0 +1,247 @@
+/* Spa libcamera client
+ *
+ * Copyright (C) 2020, Collabora Ltd.
+ *     Author: Raghavendra Rao Sidlagatta <raghavendra.rao@collabora.com>
+ *
+ * libcamera-client.c
+ *
+ * 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 <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include <spa/support/log.h>
+#include <spa/support/loop.h>
+#include <spa/support/plugin.h>
+#include <spa/utils/type.h>
+#include <spa/utils/keys.h>
+#include <spa/utils/names.h>
+#include <spa/utils/string.h>
+#include <spa/monitor/device.h>
+#include <spa/monitor/utils.h>
+
+#include "libcamera.h"
+
+struct impl {
+	struct spa_handle handle;
+	struct spa_device device;
+
+	struct spa_log *log;
+	struct spa_loop *main_loop;
+
+	struct spa_hook_list hooks;
+
+	uint64_t info_all;
+	struct spa_device_info info;
+
+	struct spa_source source;
+};
+
+static int emit_object_info(struct impl *this, uint32_t id)
+{
+	struct spa_device_object_info info;
+	struct spa_dict_item items[20];
+	uint32_t n_items = 0;
+
+	info = SPA_DEVICE_OBJECT_INFO_INIT();
+
+	info.type = SPA_TYPE_INTERFACE_Device;
+	info.factory_name = SPA_NAME_API_LIBCAMERA_DEVICE;
+	info.change_mask = (SPA_DEVICE_OBJECT_CHANGE_MASK_FLAGS |
+		SPA_DEVICE_OBJECT_CHANGE_MASK_PROPS);
+	info.flags = 0;
+
+	items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_DEVICE_ENUM_API,"libcamera-client");
+	items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_DEVICE_API, "libcamera");
+	items[n_items++] = SPA_DICT_ITEM_INIT(SPA_KEY_MEDIA_CLASS, "Video/Device");
+
+	info.props = &SPA_DICT_INIT(items, n_items);
+	spa_device_emit_object_info(&this->hooks, id, &info);
+
+	return 1;
+}
+
+static const struct spa_dict_item device_info_items[] = {
+	{ SPA_KEY_DEVICE_API, "libcamera" },
+	{ SPA_KEY_DEVICE_NICK, "libcamera-client" },
+	{ SPA_KEY_API_UDEV_MATCH, "libcamera" },
+};
+
+
+static void emit_device_info(struct impl *this, bool full)
+{
+	uint64_t old = full ? this->info.change_mask : 0;
+	if (full)
+		this->info.change_mask = this->info_all;
+	if (this->info.change_mask) {
+		this->info.props = &SPA_DICT_INIT_ARRAY(device_info_items);
+		spa_device_emit_info(&this->hooks, &this->info);
+		this->info.change_mask = old;
+	}
+}
+
+static void impl_hook_removed(struct spa_hook *hook)
+{
+	return;
+}
+
+static int
+impl_device_add_listener(void *object, struct spa_hook *listener,
+		const struct spa_device_events *events, void *data)
+{
+	struct impl *this = object;
+	struct spa_hook_list save;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(events != NULL, -EINVAL);
+
+	spa_hook_list_isolate(&this->hooks, &save, listener, events, data);
+
+	emit_device_info(this, true);
+
+	emit_object_info(this, 0);
+
+	spa_hook_list_join(&this->hooks, &save);
+
+	listener->removed = impl_hook_removed;
+	listener->priv = this;
+
+	return 0;
+}
+
+static const struct spa_device_methods impl_device = {
+	SPA_VERSION_DEVICE_METHODS,
+	.add_listener = impl_device_add_listener,
+};
+
+static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
+{
+	struct impl *this;
+
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+	spa_return_val_if_fail(interface != NULL, -EINVAL);
+
+	this = (struct impl *) handle;
+
+	if (spa_streq(type, SPA_TYPE_INTERFACE_Device))
+		*interface = &this->device;
+	else
+		return -ENOENT;
+
+	return 0;
+}
+
+static int impl_clear(struct spa_handle *handle)
+{
+	struct impl *this = (struct impl *) handle;
+
+	if(this->dev.camera) {
+		deleteLibCamera(this->dev.camera);
+		this->dev.camera = NULL;
+	}
+	return 0;
+}
+
+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)
+{
+	struct impl *this;
+
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+
+	handle->get_interface = impl_get_interface;
+	handle->clear = impl_clear;
+
+	this = (struct impl *) handle;
+
+	this->log = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log);
+	libcamera_log_topic_init(this->log);
+
+	this->main_loop = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Loop);
+
+	if (this->main_loop == NULL) {
+		spa_log_error(this->log, "a main-loop is needed");
+		return -EINVAL;
+	}
+	spa_hook_list_init(&this->hooks);
+
+	this->device.iface = SPA_INTERFACE_INIT(
+			SPA_TYPE_INTERFACE_Device,
+			SPA_VERSION_DEVICE,
+			&impl_device, this);
+
+	this->info = SPA_DEVICE_INFO_INIT();
+	this->info_all = SPA_DEVICE_CHANGE_MASK_FLAGS |
+			SPA_DEVICE_CHANGE_MASK_PROPS;
+	this->info.flags = 0;
+
+	if(this->dev.camera == NULL)
+		this->dev.camera = (LibCamera*)newLibCamera();
+	if(this->dev.camera != NULL)
+		libcamera_set_log(this->dev.camera, this->dev.log);
+
+	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;
+}
+
+const struct spa_handle_factory spa_libcamera_client_factory = {
+	SPA_VERSION_HANDLE_FACTORY,
+	SPA_NAME_API_LIBCAMERA_ENUM_CLIENT,
+	NULL,
+	impl_get_size,
+	impl_init,
+	impl_enum_interface_info,
+};