1 files changed, 291 insertions, 0 deletions
diff --git a/spa/plugins/v4l2/v4l2-device.c b/spa/plugins/v4l2/v4l2-device.c
new file mode 100644
index 0000000..53fb033
--- /dev/null
+++ b/spa/plugins/v4l2/v4l2-device.c
@@ -0,0 +1,291 @@
+/* Spa V4l2 Source
+ *
+ * Copyright © 2018 Wim Taymans
+ *
+ * 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 <linux/videodev2.h>
+
+#include <spa/support/plugin.h>
+#include <spa/support/log.h>
+#include <spa/support/loop.h>
+#include <spa/utils/keys.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 "v4l2.h"
+
+#define NAME "v4l2-device"
+
+static const char default_device[] = "/dev/video0";
+
+struct props {
+	char device[64];
+	char product_id[6];
+	char vendor_id[6];
+	int device_fd;
+};
+
+static void reset_props(struct props *props)
+{
+	strncpy(props->device, default_device, 64);
+}
+
+struct impl {
+	struct spa_handle handle;
+	struct spa_device device;
+
+	struct spa_log *log;
+
+	struct props props;
+
+	struct spa_hook_list hooks;
+
+	struct spa_v4l2_device dev;
+};
+
+static int emit_info(struct impl *this, bool full)
+{
+	int res;
+	struct spa_dict_item items[12];
+	uint32_t n_items = 0;
+	struct spa_device_info info;
+	struct spa_param_info params[2];
+        char path[128], version[16], capabilities[16], device_caps[16];
+
+	if ((res = spa_v4l2_open(&this->dev, this->props.device)) < 0)
+		return res;
+
+	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), "v4l2:%s", this->props.device);
+	ADD_ITEM(SPA_KEY_OBJECT_PATH, path);
+	ADD_ITEM(SPA_KEY_DEVICE_API, "v4l2");
+	ADD_ITEM(SPA_KEY_MEDIA_CLASS, "Video/Device");
+	if (this->props.product_id[0])
+		ADD_ITEM(SPA_KEY_DEVICE_PRODUCT_ID, this->props.product_id);
+	if (this->props.vendor_id[0])
+		ADD_ITEM(SPA_KEY_DEVICE_VENDOR_ID, this->props.vendor_id);
+	ADD_ITEM(SPA_KEY_API_V4L2_PATH, (char *)this->props.device);
+	ADD_ITEM(SPA_KEY_API_V4L2_CAP_DRIVER, (char *)this->dev.cap.driver);
+	ADD_ITEM(SPA_KEY_API_V4L2_CAP_CARD, (char *)this->dev.cap.card);
+	ADD_ITEM(SPA_KEY_API_V4L2_CAP_BUS_INFO, (char *)this->dev.cap.bus_info);
+	snprintf(version, sizeof(version), "%u.%u.%u",
+			(this->dev.cap.version >> 16) & 0xFF,
+			(this->dev.cap.version >> 8) & 0xFF,
+			(this->dev.cap.version) & 0xFF);
+	ADD_ITEM(SPA_KEY_API_V4L2_CAP_VERSION, version);
+	snprintf(capabilities, sizeof(capabilities), "%08x", this->dev.cap.capabilities);
+	ADD_ITEM(SPA_KEY_API_V4L2_CAP_CAPABILITIES, capabilities);
+	snprintf(device_caps, sizeof(device_caps), "%08x", this->dev.cap.device_caps);
+	ADD_ITEM(SPA_KEY_API_V4L2_CAP_DEVICE_CAPS, device_caps);
+#undef ADD_ITEM
+	info.props = &SPA_DICT_INIT(items, n_items);
+
+	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 = 0;
+	info.params = params;
+
+	spa_device_emit_info(&this->hooks, &info);
+
+	if (spa_v4l2_is_capture(&this->dev)) {
+		struct spa_device_object_info oinfo;
+
+		oinfo = SPA_DEVICE_OBJECT_INFO_INIT();
+		oinfo.type = SPA_TYPE_INTERFACE_Node;
+		oinfo.factory_name = SPA_NAME_API_V4L2_SOURCE;
+		oinfo.change_mask = SPA_DEVICE_OBJECT_CHANGE_MASK_PROPS;
+		oinfo.props = &SPA_DICT_INIT(items, n_items);
+
+		spa_device_emit_object_info(&this->hooks, 0, &oinfo);
+	}
+
+	spa_v4l2_close(&this->dev);
+
+	return 0;
+}
+
+static int impl_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;
+	int res = 0;
+
+	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);
+
+	if (events->info || events->object_info)
+		res = emit_info(this, true);
+
+	spa_hook_list_join(&this->hooks, &save);
+
+	return res;
+}
+
+static int impl_sync(void *object, int seq)
+{
+	struct impl *this = object;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_device_emit_result(&this->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 *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)
+{
+	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;
+	const char *str;
+
+	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);
+
+	spa_hook_list_init(&this->hooks);
+
+	this->device.iface = SPA_INTERFACE_INIT(
+			SPA_TYPE_INTERFACE_Device,
+			SPA_VERSION_DEVICE,
+			&impl_device, this);
+	this->dev.log = this->log;
+	this->dev.fd = -1;
+
+	reset_props(&this->props);
+
+	if (info && (str = spa_dict_lookup(info, SPA_KEY_API_V4L2_PATH)))
+		strncpy(this->props.device, str, 63);
+	if (info && (str = spa_dict_lookup(info, SPA_KEY_DEVICE_PRODUCT_ID)))
+		strncpy(this->props.product_id, str, 5);
+	if (info && (str = spa_dict_lookup(info, SPA_KEY_DEVICE_VENDOR_ID)))
+		strncpy(this->props.vendor_id, str, 5);
+
+	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_v4l2_device_factory = {
+	SPA_VERSION_HANDLE_FACTORY,
+	SPA_NAME_API_V4L2_DEVICE,
+	NULL,
+	impl_get_size,
+	impl_init,
+	impl_enum_interface_info,
+};