JavaCPP Presets for videoInput

Introduction

This directory contains the JavaCPP Presets module for:

• videoInput 0.200 https://github.com/ofTheo/videoInput

Please refer to the parent README.md file for more detailed information about the JavaCPP Presets.

Documentation

Java API documentation is available here:

• http://bytedeco.org/javacpp-presets/videoinput/apidocs/

Sample Usage

Here is a simple example of videoInput ported to Java from the "Example Usage" in this C++ source file:

• https://github.com/ofTheo/videoInput/blob/update2013/videoInputSrcAndDemos/libs/videoInput/videoInput.h

We can use Maven 3 to download and install automatically all the class files as well as the native binaries. To run this sample code, after creating the pom.xml and ExampleUsage.java source files below, simply execute on the command line:

 $ mvn compile exec:java

The pom.xml build file

<project>
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.bytedeco.videoinput</groupId>
    <artifactId>exampleusage</artifactId>
    <version>1.5</version>
    <properties>
        <exec.mainClass>ExampleUsage</exec.mainClass>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.bytedeco</groupId>
            <artifactId>videoinput-platform</artifactId>
            <version>0.200-1.5</version>
        </dependency>
    </dependencies>
    <build>
        <sourceDirectory>.</sourceDirectory>
    </build>
</project>

The ExampleUsage.java source file

import org.bytedeco.javacpp.*;
import org.bytedeco.videoinput.*;
import static org.bytedeco.videoinput.global.videoInputLib.*;

public class ExampleUsage {
    public static void main(String[] args) {
        //create a videoInput object
        videoInput VI = new videoInput();

        //Prints out a list of available devices and returns num of devices found
        int numDevices = VI.listDevices();

        int device1 = 0;  //this could be any deviceID that shows up in listDevices
        int device2 = 1;  //this could be any deviceID that shows up in listDevices

        //if you want to capture at a different frame rate (default is 30)
        //specify it here, you are not guaranteed to get this fps though.
        //VI.setIdealFramerate(dev, 60);

        //setup the first device - there are a number of options:

        VI.setupDevice(device1);                            //setup the first device with the default settings
        //VI.setupDevice(device1, VI_COMPOSITE);            //or setup device with specific connection type
        //VI.setupDevice(device1, 320, 240);                //or setup device with specified video size
        //VI.setupDevice(device1, 320, 240, VI_COMPOSITE);  //or setup device with video size and connection type

        //VI.setFormat(device1, VI_NTSC_M);                 //if your card doesn't remember what format it should be
                                                            //call this with the appropriate format listed above
                                                            //NOTE: must be called after setupDevice!

        //optionally setup a second (or third, fourth ...) device - same options as above
        VI.setupDevice(device2);

        //As requested width and height can not always be accomodated
        //make sure to check the size once the device is setup

        int width   = VI.getWidth(device1);
        int height  = VI.getHeight(device1);
        int size    = VI.getSize(device1);

        BytePointer yourBuffer1 = new BytePointer(size);
        BytePointer yourBuffer2 = new BytePointer(size);

        //to get the data from the device first check if the data is new
        if (VI.isFrameNew(device1)){
            VI.getPixels(device1, yourBuffer1, false, false);   //fills pixels as a BGR (for openCV) unsigned char array - no flipping
            VI.getPixels(device1, yourBuffer2, true, true);     //fills pixels as a RGB (for openGL) unsigned char array - flipping!
        }

        //same applies to device2 etc

        //to get a settings dialog for the device
        VI.showSettingsWindow(device1);


        //Shut down devices properly
        VI.stopDevice(device1);
        VI.stopDevice(device2);
    }
}