From 3799771e0a972f83d1052fc37e65191e27fed505 Mon Sep 17 00:00:00 2001
From: Steffen Pohle <steffen@gulpe.de>
Date: Tue, 7 Sep 2021 00:17:36 +0200
Subject: [PATCH] reading name of device

---
 video.cc    | 37 ++++++++++++++++++++++++++
 video.h     | 40 ++++++++++++++++++++++++++++
 videodev.cc | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 152 insertions(+)
 create mode 100644 video.cc
 create mode 100644 video.h
 create mode 100644 videodev.cc

diff --git a/video.cc b/video.cc
new file mode 100644
index 0000000..f112426
--- /dev/null
+++ b/video.cc
@@ -0,0 +1,37 @@
+/***************************************************************************************
+ *
+ * video.cc is part of SimpleSkyCam.
+ *
+ *****************************************************************************************/
+
+#include <list>
+#include <string>
+#include "gui.h"
+#include "video.h"
+
+VideoDev videodev;
+
+void cb_video_refreshlist  (GtkWidget *widget, gpointer data) {
+	GtkWidget *cbox = GTK_WIDGET(gtk_builder_get_object (GTK_BUILDER(_builder_), "cb-videodev"));
+	GtkListStore *model = GTK_LIST_STORE(gtk_combo_box_get_model(GTK_COMBO_BOX(cbox)));
+
+	std::list<std::string> devlist;
+	std::list<std::string>::iterator iter;
+
+	printf ("%s:%d %s\n", __FILE__, __LINE__, __FUNCTION__);
+
+	if (model == NULL) {
+		model = gtk_list_store_new(1, G_TYPE_STRING);
+		gtk_combo_box_set_model(GTK_COMBO_BOX(cbox),GTK_TREE_MODEL(model));
+	}
+
+	gtk_list_store_clear(GTK_LIST_STORE(model));
+
+	if (videodev.GetDeviceList(&devlist)) {
+		for (iter = devlist.begin(); iter != devlist.end(); iter++) {
+			gtk_list_store_insert_with_values(GTK_LIST_STORE(model), NULL, -1,
+			                                      0, iter->c_str(),
+			                                      -1);
+		}
+	}
+}
diff --git a/video.h b/video.h
new file mode 100644
index 0000000..b25b6bb
--- /dev/null
+++ b/video.h
@@ -0,0 +1,40 @@
+/***************************************************************************************
+ *
+ * video.h is part of SimpleSkyCam.
+ *
+ ***************************************************************************************/
+
+#ifndef _VIDEO_H_
+#define _VIDEO_H_
+
+#include <string>
+#include <list>
+#include "gui.h"
+#include "config.h"
+
+enum {
+	VDEV_STATUS_UNKNOWN,
+	VDEV_STATUS_OK,
+	VDEV_STATUS_ERROR
+};
+
+class VideoDev {
+private:
+	std::string conf_device;
+	std::string conf_devicename;
+	gboolean (*callback)(gpointer data);
+	int status;
+public:
+	VideoDev();
+	~VideoDev();
+
+	int Start(std::string dev, gboolean (*callback_func)(gpointer data));		// will start a new thread
+	int Stop();		// stop video processing and stop the pthread
+
+	int GetDeviceList(std::list<std::string> *list);
+
+	int GetStatus() { return status; };
+};
+
+#endif // _VIDEO_H_
+
diff --git a/videodev.cc b/videodev.cc
new file mode 100644
index 0000000..ee5d643
--- /dev/null
+++ b/videodev.cc
@@ -0,0 +1,75 @@
+/***************************************************************************************
+ *
+ * videodev.cc is part of SimpleSkyCam.
+ *
+ *****************************************************************************************/
+
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <linux/videodev2.h>
+
+#include <list>
+#include <string>
+
+#include "video.h"
+
+
+VideoDev::VideoDev() {
+	conf_device = "";
+	conf_devicename = "";
+	status = VDEV_STATUS_OK;
+	callback = NULL;
+};
+
+
+VideoDev::~VideoDev() {
+	Stop();
+}
+
+
+//
+// return list of devices in form of /dev/videoYY [Name]
+int VideoDev::GetDeviceList(std::list<std::string> *list) {
+	std::string device;
+	int devnum;
+
+	if (list == NULL) return 0;
+
+	list->clear();
+	for (devnum = 0; devnum < 255; devnum++) {
+		device = "/dev/video"+std::to_string(devnum);
+
+		if (device.compare (conf_device) != 0) {
+			int fd;
+			struct v4l2_capability vcap;
+
+			if((fd = open(device.c_str(), O_RDONLY)) == -1){
+				continue;
+			}
+
+			if(ioctl(fd, VIDIOC_QUERYCAP, &vcap) == -1)
+				strncpy ((char*)&vcap.card, "unknown", sizeof(vcap.card));
+			close(fd);
+			device += " [" + (std::string) ((char*)vcap.card) + "]";
+		}
+		else {
+			device += " [" + (std::string) conf_devicename + "]";
+		}
+
+		list->push_back(device);
+	}
+
+	return 1;
+}
+
+
+int VideoDev::Start(std::string dev, gboolean (*callback_func)(gpointer data)) {
+	return VDEV_STATUS_ERROR;
+};
+
+
+int VideoDev::Stop() {
+	return VDEV_STATUS_OK;
+}