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