(* /*****************************************************************
  //                       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.
  *******************************************************************
  // Original file:
  // opencv\samples\c\adaptiveskindetector.cpp
  // *************************************************************** *)

// JCL_DEBUG_EXPERT_GENERATEJDBG OFF
// JCL_DEBUG_EXPERT_INSERTJDBG OFF
// JCL_DEBUG_EXPERT_DELETEMAPFILE OFF
program cv_AdaptiveSkinDetector;

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

uses
  System.SysUtils,
  Windows,
  uLibName in '..\..\..\include\uLibName.pas',
  highgui_c in '..\..\..\include\highgui\highgui_c.pas',
  core_c in '..\..\..\include\core\core_c.pas',
  Core.types_c in '..\..\..\include\core\Core.types_c.pas',
  imgproc.types_c in '..\..\..\include\imgproc\imgproc.types_c.pas',
  imgproc_c in '..\..\..\include\imgproc\imgproc_c.pas',
  legacy in '..\..\..\include\legacy\legacy.pas',
  calib3d in '..\..\..\include\calib3d\calib3d.pas',
  imgproc in '..\..\..\include\imgproc\imgproc.pas',
  haar in '..\..\..\include\objdetect\haar.pas',
  objdetect in '..\..\..\include\objdetect\objdetect.pas',
  tracking in '..\..\..\include\video\tracking.pas',
  Core in '..\..\..\include\core\core.pas',
  contrib in '..\..\..\include\contrib\contrib.pas',
  Mat in '..\..\..\include\core\Mat.pas',
  core.types in '..\..\..\include\core\core.types.pas',
  cvUtils in '..\..\..\include\cvUtils.pas';

const
  CLOCKS_PER_SEC = 1000;

procedure help;
begin
  Writeln('This program demonstrates the contributed flesh detector CvAdaptiveSkinDetector which can be found in contrib.cpp');
  Writeln('Usage: ');
  Writeln(ExtractFileName(ParamStr(0)), ' fileMask firstFrame lastFrame');
  Writeln('Example:');
  Writeln(ExtractFileName(ParamStr(0)), ' C:\VideoSequences\sample1\right_view\temp_%05d.jpg  0  1000');
  Writeln('   iterates through temp_00000.jpg  to  temp_01000.jpg');
  Writeln('If no parameter specified, this application will try to capture from the default Webcam.');
  Writeln('Please note: Background should not contain large surfaces with skin tone.');
  Writeln(' ESC will stop');
  Writeln('Using OpenCV version ', CV_VERSION);
end;

Type
  TASDFrameHolder = class
  private
    image: pIplImage;
    timeStamp: double;
  public
    constructor Create;
    destructor Destroy; override;
    procedure assignFrame(sourceImage: pIplImage; frameTime: double); virtual;
    function getImage: pIplImage;
    function getTimeStamp: double;
    procedure setImage(sourceImage: pIplImage); virtual;
  end;

  TASDFrameSequencer = class
  public
    destructor Destroy; override;
    function getNextImage: pIplImage; virtual;
    procedure close; virtual;
    function isOpen: bool; virtual;
    procedure getFrameCaption(var caption: AnsiString); virtual;
  end;

  TASDCVFrameSequencer = class(TASDFrameSequencer)
  protected
    capture: pCvCapture;
  public
    function getNextImage: pIplImage; override;
    procedure close; override;
    function isOpen: bool; override;
  end;

  TASDFrameSequencerWebCam = class(TASDCVFrameSequencer)
  public
    function open(cameraIndex: Integer): boolean; virtual;
    procedure getFrameCaption(var caption: AnsiString); override;
  end;

  TASDFrameSequencerVideoFile = class(TASDCVFrameSequencer)
  public
    function open(const fileName: pCvChar): bool; virtual;
  end;

  TASDFrameSequencerImageFile = class(TASDFrameSequencer)
  private
    sFileNameMask: AnsiString;
    nCurrentIndex, nStartIndex, nEndIndex: Integer;
  public
    procedure open(const fileNameMask: AnsiString; startIndex, endIndex: Integer); virtual;
    procedure getFrameCaption(var caption: AnsiString); override;
    function getNextImage: pIplImage; override;
    procedure close; override;
    function isOpen: bool; override;
  end;

  { TASDFrameHolder }

procedure TASDFrameHolder.assignFrame(sourceImage: pIplImage; frameTime: double);
begin
  if Assigned(image) then
  begin
    cvReleaseImage(image);
    image := nil;
  end;
  image := cvCloneImage(sourceImage);
  timeStamp := frameTime;
end;

constructor TASDFrameHolder.Create;
begin
  image := nil;
  timeStamp := 0;
end;

destructor TASDFrameHolder.Destroy;
begin
  cvReleaseImage(image);
  inherited;
end;

function TASDFrameHolder.getImage: pIplImage;
begin
  Result := image;
end;

function TASDFrameHolder.getTimeStamp: double;
begin
  Result := timeStamp;
end;

procedure TASDFrameHolder.setImage(sourceImage: pIplImage);
begin
  image := sourceImage;
end;

{ TASDFrameSequencer }

procedure TASDFrameSequencer.close;
begin

end;

destructor TASDFrameSequencer.Destroy;
begin
  close;
  inherited;
end;

procedure TASDFrameSequencer.getFrameCaption(var caption: AnsiString);
begin

end;

function TASDFrameSequencer.getNextImage: pIplImage;
begin
  Result := nil;
end;

function TASDFrameSequencer.isOpen: bool;
begin
  Result := False;
end;

{ TASDFrameSequencerImageFile }

procedure TASDFrameSequencerImageFile.close;
begin
  nCurrentIndex := nEndIndex + 1;
end;

procedure TASDFrameSequencerImageFile.getFrameCaption(var caption: AnsiString);
begin
  caption := Format(sFileNameMask, [nCurrentIndex]);
end;

function TASDFrameSequencerImageFile.getNextImage: pIplImage;
Var
  fileName: AnsiString;
begin
  Inc(nCurrentIndex);
  if (nCurrentIndex > nEndIndex) then
    Exit(nil);
  fileName := Format(sFileNameMask, [nCurrentIndex]);
  Result := cvLoadImage(pCvChar(@fileName[1]));
end;

function TASDFrameSequencerImageFile.isOpen: bool;
begin
  Result := (nCurrentIndex <= nEndIndex);
end;

procedure TASDFrameSequencerImageFile.open(const fileNameMask: AnsiString; startIndex, endIndex: Integer);
begin
  nCurrentIndex := startIndex - 1;
  nStartIndex := startIndex;
  nEndIndex := endIndex;
  sFileNameMask := Format('%s', [fileNameMask]);
end;

{ TASDFrameSequencerVideoFile }

function TASDFrameSequencerVideoFile.open(const fileName: pCvChar): bool;
begin
  close();
  capture := cvCreateFileCapture(fileName);
  Result := Assigned(capture);
end;

{ TASDFrameSequencerWebCam }

procedure TASDFrameSequencerWebCam.getFrameCaption(var caption: AnsiString);
begin
  caption := 'Web cam';
end;

function TASDFrameSequencerWebCam.open(cameraIndex: Integer): boolean;
begin
  close();
  capture := cvCreateCameraCapture(cameraIndex);
  Result := Assigned(capture);
end;

{ TASDCVFrameSequencer }

procedure TASDCVFrameSequencer.close;
begin
  inherited;
  if (capture <> nil) then
    cvReleaseCapture(capture);
end;

function TASDCVFrameSequencer.getNextImage: pIplImage;
Var
  image: pIplImage;
begin
  image := cvQueryFrame(capture);
  if (image <> nil) then
    Exit(cvCloneImage(image))
  else
    Exit(nil);
end;

function TASDCVFrameSequencer.isOpen: bool;
begin
  Result := (capture <> nil);
end;

// ---------------------------------------------------------------------
procedure putTextWithShadow(img: pIplImage; const str: pCvChar; point: TCvPoint; font: pCvFont;
  color: TCvScalar { = CV_RGB(255, 255, 128) } );
begin
  cvPutText(img, str, cvPoint(point.x - 1, point.y - 1), font, CV_RGB(0, 0, 0));
  cvPutText(img, str, point, font, color);
end;

procedure ASD_RGB_SET_PIXEL(ptr: pByte; r, g, b: uchar); inline;
begin
  // (*pointer) = (unsigned char)b;
  ptr[0] := b;
  // (*(pointer+1)) = (unsigned char)g;
  ptr[1] := g;
  // (*(pointer+2)) = (unsigned char)r;
  ptr[2] := r;
end;

procedure ASD_RGB_GET_PIXEL(ptr: pByte; Var r, g, b: uchar); inline;
begin
  // b = (unsigned char)(*(pointer));
  b := ptr[0];
  // g = (unsigned char)(*(pointer+1));
  g := ptr[1];
  // r = (unsigned char)(*(pointer+2));
  r := ptr[2];
end;

procedure displayBuffer(rgbDestImage: pIplImage; buffer: pIplImage; rValue, gValue, bValue: Integer);
Var
  x, y, nWidth, nHeight: Integer;
  destX, destY, dx, dy: double;
  c: uchar;
  pSrc: pByte;
begin
  nWidth := buffer^.width;
  nHeight := buffer^.height;

  dx := rgbDestImage^.width / nWidth;
  dy := rgbDestImage^.height / nHeight;

  destX := 0;
  for x := 0 to nWidth - 1 do
  begin
    destY := 0;
    for y := 0 to nHeight - 1 do
    begin
      c := (buffer^.imageData + buffer^.widthStep * y)[x];

      if (c <> 0) then
      begin
        pSrc := rgbDestImage^.imageData + rgbDestImage^.widthStep * Trunc(destY) +
          (Trunc(destX) * rgbDestImage^.nChannels);
        ASD_RGB_SET_PIXEL(pSrc, rValue, gValue, bValue);
      end;
      destY := destY + dy;
    end;
    destY := 0;
    destX := destX + dx;
  end;
end;

Var
  caption, s, windowName: AnsiString;
  img: pIplImage;
  filterMask: pIplImage = nil;
  filter: TCvAdaptiveSkinDetector;
  sequencer: TASDFrameSequencer;
  base_font: TCvFont;
  clockTotal, numFrames: LongInt;
  clock: Cardinal;

begin
  try
    help;
    filter := TCvAdaptiveSkinDetector.Create(1, TCvAdaptiveSkinDetector.MORPHING_METHOD_ERODE_DILATE);
    clockTotal := 0;
    numFrames := 0;

    if (ParamCount < 3) then
    begin
      help;
      sequencer := TASDFrameSequencerWebCam.Create;
      (sequencer as TASDFrameSequencerWebCam).open(-1);
      if (not sequencer.isOpen()) then
      begin
        Writeln('Error: Cannot initialize the default Webcam');
      end;
    end
    else
    begin
      sequencer := TASDFrameSequencerImageFile.Create;
      // A sequence of images captured from video source, is stored here
      (sequencer as TASDFrameSequencerImageFile).open(ParamStr(1), StrToInt(ParamStr(2)), StrToInt(ParamStr(3)));
    end;

    windowName := 'Adaptive Skin Detection Algorithm for Video Sequences';

    cvNamedWindow(pCvChar(@windowName[1]), CV_WINDOW_AUTOSIZE);
    cvInitFont(@base_font, CV_FONT_VECTOR0, 0.5, 0.5);

    // Usage:
    // c:\>CvASDSample 'C:\VideoSequences\sample1\right_view\temp_%05d.jpg' 0 1000

    Writeln('Press ESC to stop.');
    img := sequencer.getNextImage();
    while Assigned(img) do
    begin
      Inc(numFrames);

      if not Assigned(filterMask) then
        filterMask := cvCreateImage(cvSize(img^.width, img^.height), IPL_DEPTH_8U, 1);
      clock := GetTickCount;
      filter.process(img, filterMask); // DETECT SKIN
      clockTotal := clockTotal + (GetTickCount - clock);

      displayBuffer(img, filterMask, 0, 255, 0);

      sequencer.getFrameCaption(caption);
      s := Format('%s - %d x %d', [caption, img^.width, img^.height]);
      putTextWithShadow(img, pCvChar(@s[1]), cvPoint(10, img^.height - 35), @base_font, CV_RGB(0, 255, 128));

      s := Format('Average processing time per frame: %5.2fms', [((clockTotal * 1000) / CLOCKS_PER_SEC) / numFrames]);
      putTextWithShadow(img, pCvChar(@s[1]), cvPoint(10, img^.height - 15), @base_font, CV_RGB(255, 255, 128));

      cvShowImage(pCvChar(@windowName[1]), img);
      cvReleaseImage(img);

      if (cvWaitKey(1) = 27) then
        break;
      img := sequencer.getNextImage();
    end;

    sequencer.close();
    sequencer.Free;
    filter.Free;

    cvReleaseImage(filterMask);

    cvDestroyAllWindows;

    Writeln('Finished, ', numFrames, ' frames processed.');

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

end.