text: /* This file is part of the Pangolin Project.
   * http://github.com/stevenlovegrove/Pangolin
   *
   * Copyright (c) 2013 Steven Lovegrove
   *
   * 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 <pangolin/video/drivers/test.h>
  #include <pangolin/factory/factory_registry.h>
  #include <pangolin/video/iostream_operators.h>
  
  namespace pangolin
  {
  
  void setRandomData(unsigned char * arr, size_t size){
    for(size_t i = 0 ; i < size;i++) {
  //      arr[i] = (unsigned char)(i * 255.0 / size);
        arr[i] = (unsigned char)(rand()/(RAND_MAX/255.0));
    }
  }
  
  TestVideo::TestVideo(size_t w, size_t h, size_t n, std::string pix_fmt)
  {
      const PixelFormat pfmt = PixelFormatFromString(pix_fmt);
  
      size_bytes = 0;
  
      for(size_t c=0; c < n; ++c) {
          const StreamInfo stream_info(pfmt, w, h, (w*pfmt.bpp)/8, 0);
          streams.push_back(stream_info);
          size_bytes += w*h*(pfmt.bpp)/8;
      }
  }
  
  TestVideo::~TestVideo()
  {
  
  }
  
  //! Implement VideoInput::Start()
  void TestVideo::Start()
  {
  
  }
  
  //! Implement VideoInput::Stop()
  void TestVideo::Stop()
  {
  
  }
  
  //! Implement VideoInput::SizeBytes()
  size_t TestVideo::SizeBytes() const
  {
      return size_bytes;
  }
  
  //! Implement VideoInput::Streams()
  const std::vector<StreamInfo>& TestVideo::Streams() const
  {
      return streams;
  }
  
  //! Implement VideoInput::GrabNext()
  bool TestVideo::GrabNext( unsigned char* image, bool /*wait*/ )
  {
      setRandomData(image, size_bytes);
      return true;
  }
  
  //! Implement VideoInput::GrabNewest()
  bool TestVideo::GrabNewest( unsigned char* image, bool wait )
  {
      return GrabNext(image,wait);
  }
  
  PANGOLIN_REGISTER_FACTORY(TestVideo)
  {
      struct TestVideoFactory final : public FactoryInterface<VideoInterface> {
          std::unique_ptr<VideoInterface> Open(const Uri& uri) override {
              const ImageDim dim = uri.Get<ImageDim>("size", ImageDim(640,480));
              const int n = uri.Get<int>("n", 1);
              std::string fmt  = uri.Get<std::string>("fmt","RGB24");
              return std::unique_ptr<VideoInterface>(new TestVideo(dim.x,dim.y,n,fmt));
          }
      };
  
      FactoryRegistry<VideoInterface>::I().RegisterFactory(std::make_shared<TestVideoFactory>(), 10, "test");
  }
  
  }
  