vcap: Initial implementation

This UPM module captures a still frame from a Linux V4L device, such
as a USB webcam, and and then allows you to save it as a JPEG image
into a file.

The camera and driver in use must support streaming, mmap-able buffers
and must provide data in YUYV format.  This should encompass most
video cameras out there.  It has been tested with a few off the shelf
USB cameras without any problems.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

examples/c++/CMakeLists.txt

@@ -264,6 +264,7 @@ if (BACNET_FOUND)
   include_directories(${PROJECT_SOURCE_DIR}/src/bacnetmstp)
   add_example (e50hx)
 endif()
+add_example (vcap)
 
 # These are special cases where you specify example binary, source file and module(s)
 include_directories (${PROJECT_SOURCE_DIR}/src)

examples/c++/vcap.cxx

@@ -0,0 +1,70 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2016 Intel Corporation.
+ *
+ * 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 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 <unistd.h>
+#include <iostream>
+
+#include "vcap.hpp"
+
+using namespace std;
+
+int main(int argc, char **argv)
+{
+//! [Interesting]
+
+  string defaultDev = "/dev/video0";
+
+  // if an argument was specified, use it as the device instead
+  if (argc > 1)
+    defaultDev = string(argv[1]);
+
+  cout << "Using device " << defaultDev << endl;
+  cout << "Initializing..." << endl;
+
+  // Instantiate an VCAP instance, using the specified video device
+  upm::VCAP *sensor = new upm::VCAP(defaultDev);
+
+  // enable some debug/verbose output
+  sensor->setDebug(true);
+
+  // This is just a hint.  The kernel can change this to a lower
+  // resolution that the hardware supports.  Use getWidth() and
+  // getHeight() methods to see what the kernel actually chose if you
+  // care.
+  sensor->setResolution(1920, 1080);
+
+  // capture an image
+  sensor->captureImage();
+
+  // convert and save it as a jpeg
+  sensor->saveImage("video-img1.jpg");
+
+  cout << "Exiting..." << endl;
+
+  delete sensor;
+
+//! [Interesting]
+
+  return 0;
+}

examples/java/CMakeLists.txt

@@ -120,6 +120,7 @@ endif()
 if (BACNET_FOUND)
   add_example(E50HX_Example e50hx)
 endif()
+add_example(VCAP_Example vcap)
 
 add_example_with_path(Jhd1313m1_lcdSample lcd i2clcd)
 add_example_with_path(Jhd1313m1Sample lcd i2clcd)

examples/java/VCAP_Example.java

@@ -0,0 +1,60 @@
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2016 Intel Corporation.
+ *
+ * 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 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.
+ */
+
+import upm_vcap.VCAP;
+
+public class VCAP_Example 
+{
+    private static String defaultDev = "/dev/video0";
+
+    public static void main(String[] args) throws InterruptedException
+    {
+// ! [Interesting]
+        if (args.length > 0)
+            defaultDev = args[0];
+
+        System.out.println("Using device " + defaultDev);
+        System.out.println("Initializing...");
+
+        // Instantiate an VCAP instance, using the specified video device
+        VCAP sensor = new VCAP(defaultDev);
+        
+        // enable some debug/verbose output
+        sensor.setDebug(true);
+
+        // This is just a hint.  The kernel can change this to a lower
+        // resolution that the hardware supports.  Use getWidth() and
+        // getHeight() methods to see what the kernel actually chose if you
+        // care.
+        sensor.setResolution(1920, 1080);
+
+        // capture an image
+        sensor.captureImage();
+        
+        // convert and save it as a jpeg
+        sensor.saveImage("video-img1.jpg");
+
+// ! [Interesting]
+    }
+}

examples/javascript/vcap.js

@@ -0,0 +1,69 @@
+/*jslint node:true, vars:true, bitwise:true, unparam:true */
+/*jshint unused:true */
+
+/*
+ * Author: Jon Trulson <jtrulson@ics.com>
+ * Copyright (c) 2016 Intel Corporation.
+ *
+ * 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 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.
+ */
+
+
+var sensorObj = require('jsupm_vcap');
+
+
+/************** Main code **************/
+
+var defaultDev = "/dev/video0";
+
+// if an argument was specified, use it as the device instead
+if (process.argv.length > 2)
+{
+    defaultDev = process.argv[2];
+}
+
+console.log("Using device " + defaultDev);
+console.log("Initializing...");
+
+// Instantiate an VCAP instance, using the specified video device
+var sensor = new sensorObj.VCAP(defaultDev);
+
+// enable some debug/verbose output
+sensor.setDebug(true);
+
+// This is just a hint.  The kernel can change this to a lower
+// resolution that the hardware supports.  Use getWidth() and
+// getHeight() methods to see what the kernel actually chose if you
+// care.
+sensor.setResolution(1920, 1080);
+
+// capture an image
+sensor.captureImage();
+
+// convert and save it as a jpeg
+sensor.saveImage("video-img1.jpg");
+
+// make sure we clean up
+sensor = null;
+sensorObj.cleanUp();
+sensorObj = null;
+console.log("Exiting...");
+process.exit(0);
+

examples/python/vcap.py

@@ -0,0 +1,67 @@
+#!/usr/bin/python
+# Author: Jon Trulson <jtrulson@ics.com>
+# Copyright (c) 2016 Intel Corporation.
+#
+# 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 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.
+
+import time, sys, signal, atexit
+import pyupm_vcap as sensorObj
+
+## Exit handlers ##
+# This function stops python from printing a stacktrace when you hit control-C
+def SIGINTHandler(signum, frame):
+	raise SystemExit
+
+# This function lets you run code on exit
+def exitHandler():
+	print "Exiting..."
+	sys.exit(0)
+
+# Register exit handlers
+atexit.register(exitHandler)
+signal.signal(signal.SIGINT, SIGINTHandler)
+
+defaultDev = "/dev/video0"
+
+# if an argument was specified, use it as the device instead
+if (len(sys.argv) > 1):
+        defaultDev = sys.argv[1]
+
+print "Using device", defaultDev
+print "Initializing..."
+
+# Instantiate an VCAP instance, using the specified video device
+sensor = sensorObj.VCAP(defaultDev)
+
+# enable some debug/verbose output
+sensor.setDebug(True);
+
+# This is just a hint.  The kernel can change this to a lower
+# resolution that the hardware supports.  Use getWidth() and
+# getHeight() methods to see what the kernel actually chose if you
+# care.
+sensor.setResolution(1920, 1080);
+
+# capture an image
+sensor.captureImage();
+
+# convert and save it as a jpeg
+sensor.saveImage("video-img1.jpg");
+