v01

thirdparty/Pangolin/examples/SimpleVideo/main.cpp

@@ -0,0 +1,111 @@
+/**
+ * @author  Steven Lovegrove
+ * Copyright (C) 2010  Steven Lovegrove
+ *                     Imperial College London
+ **/
+
+#include <pangolin/pangolin.h>
+
+void SetGlFormat(GLint& glformat, GLenum& gltype, const pangolin::PixelFormat& fmt)
+{
+    switch( fmt.channels) {
+    case 1: glformat = GL_LUMINANCE; break;
+    case 3: glformat = GL_RGB; break;
+    case 4: glformat = GL_RGBA; break;
+    default: throw std::runtime_error("Unable to display video format");
+    }
+
+    switch (fmt.channel_bits[0]) {
+    case 8: gltype = GL_UNSIGNED_BYTE; break;
+    case 16: gltype = GL_UNSIGNED_SHORT; break;
+    case 32: gltype = GL_FLOAT; break;
+    default: throw std::runtime_error("Unknown channel format");
+    }
+}
+
+void VideoSample(const std::string uri)
+{
+    // Setup Video Source
+    pangolin::VideoInput video(uri);
+    const pangolin::PixelFormat vid_fmt = video.PixFormat();
+    const unsigned w = video.Width();
+    const unsigned h = video.Height();
+
+    // Work out appropriate GL channel and format options
+    GLint glformat;
+    GLenum gltype;
+    SetGlFormat(glformat, gltype, vid_fmt);
+    
+    // Create OpenGL window
+    pangolin::CreateWindowAndBind("Main",w,h);
+
+    // Create viewport for video with fixed aspect
+    pangolin::View& vVideo = pangolin::Display("Video").SetAspect((float)w/h);
+
+    // OpenGl Texture for video frame.
+    pangolin::GlTexture texVideo(w,h,glformat,false,0,glformat,gltype);
+
+    unsigned char* img = new unsigned char[video.SizeBytes()];
+
+    for(int frame=0; !pangolin::ShouldQuit(); ++frame)
+    {
+        glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
+
+        if( video.GrabNext(img,true) ) {
+            texVideo.Upload( img, glformat, gltype );
+        }
+
+        // Activate video viewport and render texture
+        vVideo.Activate();
+        texVideo.RenderToViewportFlipY();
+
+        // Swap back buffer with front and process window events
+        pangolin::FinishFrame();
+    }
+
+    delete[] img;
+}
+
+
+int main( int argc, char* argv[] )
+{
+    std::string uris[] = {
+        "dc1394:[fps=30,dma=10,size=640x480,iso=400]//0",
+        "convert:[fmt=RGB24]//v4l:///dev/video0",
+        "convert:[fmt=RGB24]//v4l:///dev/video1",
+        "openni:[img1=rgb]//",
+        "pleora:[sn=00000215,size=640x480,pos=64x64]//",
+        "test:[size=160x120,n=1,fmt=RGB24]//"
+        ""
+    };
+
+    if( argc > 1 ) {
+        const std::string uri = std::string(argv[1]);
+        VideoSample(uri);
+    }else{
+        std::cout << "Usage  : SimpleRecord [video-uri]" << std::endl << std::endl;
+        std::cout << "Where video-uri describes a stream or file resource, e.g." << std::endl;
+        std::cout << "\tfile:[realtime=1]///home/user/video/movie.pvn" << std::endl;
+        std::cout << "\tfile:///home/user/video/movie.avi" << std::endl;
+        std::cout << "\tfiles:///home/user/seqiemce/foo%03d.jpeg" << std::endl;
+        std::cout << "\tdc1394:[fmt=RGB24,size=640x480,fps=30,iso=400,dma=10]//0" << std::endl;
+        std::cout << "\tdc1394:[fmt=FORMAT7_1,size=640x480,pos=2+2,iso=400,dma=10]//0" << std::endl;
+        std::cout << "\tv4l:///dev/video0" << std::endl;
+        std::cout << "\tconvert:[fmt=RGB24]//v4l:///dev/video0" << std::endl;
+        std::cout << "\tmjpeg://http://127.0.0.1/?action=stream" << std::endl;
+        std::cout << "\topenni:[img1=rgb]//" << std::endl;
+        std::cout << std::endl;
+
+        // Try to open some video device
+        for(int i=0; !uris[i].empty(); ++i )
+        {
+            try{
+                std::cout << "Trying: " << uris[i] << std::endl;
+                VideoSample(uris[i]);
+                return 0;
+            }catch(const pangolin::VideoException&) { }
+        }
+    }
+
+    return 0;
+}