// *****************************************************************
// Delphi-OpenCV Demo
// Copyright (C) 2013 Project Delphi-OpenCV
// ****************************************************************
// Contributor:
// Laentir Valetov
// email:laex@bk.ru
// ****************************************************************
// You may retrieve the latest version of this file at the GitHub,
// located at git://github.com/Laex/Delphi-OpenCV.git
// ****************************************************************
// The contents of this file are used with permission, subject to
// the Mozilla Public License Version 1.1 (the "License"); you may
// not use this file except in compliance with the License. You may
// obtain a copy of the License at
// http://www.mozilla.org/MPL/MPL-1_1Final.html
//
// Software distributed under the License is distributed on an
// "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
// implied. See the License for the specific language governing
// rights and limitations under the License.
// *******************************************************************

program TwoCameras_C;

{$APPTYPE CONSOLE}
{$R *.res}

uses
  System.SysUtils,
  ocv.highgui_c,
  ocv.core_c,
  ocv.core.types_c,
  ocv.imgproc_c,
  ocv.imgproc.types_c;

var
  frame1: PIplImage = nil;
  frame2: PIplImage = nil;
  video1: PCvCapture = nil;
  video2: PCvCapture = nil;
  c, i: integer;

begin
  try
    i := 0;
    Writeln('Camera 1');
    While (not Assigned(video1)) and (i < CV_CAP_MIL) do
    begin
      Writeln(i);
      video1 := cvCreateCameraCapture(i);
      Inc(i);
      if Assigned(video1) then
      begin
        cvSetCaptureProperty(video1, CV_CAP_PROP_FRAME_WIDTH, 320);
        cvSetCaptureProperty(video1, CV_CAP_PROP_FRAME_HEIGHT, 240);
        cvNamedWindow('Camera 1');
        Break;
      end;
    end;

    Writeln('Camera 2');
    While (not Assigned(video2)) and (i < CV_CAP_MIL) do
    begin
      Writeln(i);
      video2 := cvCreateCameraCapture(i);
      Inc(i);
      if Assigned(video2) then
      begin
        cvSetCaptureProperty(video2, CV_CAP_PROP_FRAME_WIDTH, 320);
        cvSetCaptureProperty(video2, CV_CAP_PROP_FRAME_HEIGHT, 240);
        cvNamedWindow('Camera 2');
        Break;
      end;
    end;

    while True do
    begin
      if Assigned(video1) then
      begin
        frame1 := cvQueryFrame(video1);
        if Assigned(frame1) then
          cvShowImage('Camera 1', frame1);
      end;
      if Assigned(video2) then
      begin
        frame2 := cvQueryFrame(video2);
        if Assigned(frame2) then
          cvShowImage('Camera 2', frame2);
      end;

      if cvWaitKey(30) = 27 then
        Break;
    end;

    cvDestroyAllWindows;

    if Assigned(video1) then
      cvReleaseCapture(video1);

    if Assigned(video2) then
      cvReleaseCapture(video2);

  except
    on E: Exception do
      WriteLn(E.ClassName, ': ', E.Message);
  end;

end.