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Delphi-OpenCV/component/uOCVCamera.pas
Laex b3cf77748c OCVSplitter 
Signed-off-by: Laex <laex@bk.ru>
2013-09-16 15:49:10 +04:00

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(* /*****************************************************************
// 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.
******************************************************************* *)
unit uOCVCamera;
interface
uses
System.SysUtils,
System.Classes,
core.types_c,
highgui_c,
uOCVTypes;
type
TocvCameraCaptureSource =
//
(CAP_ANY { = 0 } , // autodetect
CAP_CAM_0 { =0 } , //
CAP_CAM_1 { =1 } , //
CAP_CAM_2 { =2 } , //
CAP_CAM_3 { =3 } , //
CAP_CAM_4 { =4 } , //
CAP_CAM_5 { =5 } , //
CAP_MIL { = 100 } , // MIL proprietary drivers
CAP_VFW { = 200 } , // platform native
CAP_V4L { = 200 } , //
CAP_V4L2 { = 200 } , //
CAP_FIREWARE { = 300 } , // IEEE 1394 drivers
CAP_FIREWIRE { = 300 } , //
CAP_IEEE1394 { = 300 } , //
CAP_DC1394 { = 300 } , //
CAP_CMU1394 { = 300 } , //
CAP_STEREO { = 400 } , // TYZX proprietary drivers
CAP_TYZX { = 400 } , //
TYZX_LEFT { = 400 } , //
TYZX_RIGHT { = 401 } , //
TYZX_COLOR { = 402 } , //
TYZX_Z { = 403 } , //
CAP_QT { = 500 } , // QuickTime
CAP_UNICAP { = 600 } , // Unicap drivers
CAP_DSHOW { = 700 } , // DirectShow (via videoInput)
CAP_PVAPI { = 800 } , // PvAPI, Prosilica GigE SDK
CAP_OPENNI { = 900 } , // OpenNI (for Kinect)
CAP_OPENNI_ASUS { = 910 } , // OpenNI (for Asus Xtion)
CAP_ANDROID { = 1000 } , // Android
CAP_XIAPI { = 1100 } , // XIMEA Camera API
CAP_AVFOUNDATION { = 1200 } );
type
TocvOnDataNotify = procedure(const IplImage: pIplImage) of object;
TocvCameraThread = class(TThread)
private
FOnNotifyData: TocvOnDataNotify;
protected
FCapture: pCvCapture;
procedure Execute; override;
public
property OnNotifyData: TocvOnDataNotify Read FOnNotifyData write FOnNotifyData;
end;
TocvResolution = (r160x120, r320x240, r424x240, r640x360, r800x448, r960x544, r1280x720);
TocvCamera = class(TocvDataSource)
private
FEnabled : Boolean;
FCameraCaptureSource: TocvCameraCaptureSource;
FResolution : TocvResolution;
procedure SetEnabled(const Value: Boolean);
procedure SetCameraCaptureSource(const Value: TocvCameraCaptureSource);
procedure setResolution(const Value: TocvResolution);
procedure TerminateCameraThread;
procedure ReleaseCamera;
procedure SetCameraResolution;
protected
FCapture : pCvCapture;
FOpenCVCameraThread: TocvCameraThread;
procedure OnNotifyData(const IplImage: pIplImage);
public
constructor Create(AOwner: TComponent); //override;
destructor Destroy; override;
published
property Enabled : Boolean Read FEnabled write SetEnabled default False;
property CameraCaptureSource: TocvCameraCaptureSource read FCameraCaptureSource write SetCameraCaptureSource
default CAP_ANY;
property Resolution: TocvResolution read FResolution write setResolution;
end;
implementation
const
ocvCameraCaptureSource: array [TocvCameraCaptureSource] of Longint =
//
(CV_CAP_ANY, // autodetect
CV_CAP_CAM_0, //
CV_CAP_CAM_1, //
CV_CAP_CAM_2, //
CV_CAP_CAM_3, //
CV_CAP_CAM_4, //
CV_CAP_CAM_5, //
CV_CAP_MIL, // MIL proprietary drivers
CV_CAP_VFW, // platform native
CV_CAP_V4L, //
CV_CAP_V4L2, //
CV_CAP_FIREWARE, // IEEE 1394 drivers
CV_CAP_FIREWIRE, //
CV_CAP_IEEE1394, //
CV_CAP_DC1394, //
CV_CAP_CMU1394, //
CV_CAP_STEREO, // TYZX proprietary drivers
CV_CAP_TYZX, //
CV_TYZX_LEFT, //
CV_TYZX_RIGHT, //
CV_TYZX_COLOR, //
CV_TYZX_Z, //
CV_CAP_QT, // QuickTime
CV_CAP_UNICAP, // Unicap drivers
CV_CAP_DSHOW, // DirectShow (via videoInput)
CV_CAP_PVAPI, // PvAPI; Prosilica GigE SDK
CV_CAP_OPENNI, // OpenNI (for Kinect)
CV_CAP_OPENNI_ASUS, // OpenNI (for Asus Xtion)
CV_CAP_ANDROID, // Android
CV_CAP_XIAPI, // XIMEA Camera API
CV_CAP_AVFOUNDATION);
ThreadSleepConst = 20;
Type
TCameraResolution = record
cWidth, cHeight: Integer;
end;
Const
CameraResolution: array [TocvResolution] of TCameraResolution = ((cWidth: 160; cHeight: 120), (cWidth: 320;
cHeight: 240), (cWidth: 424; cHeight: 240), (cWidth: 640; cHeight: 360), (cWidth: 800; cHeight: 448), (cWidth: 960;
cHeight: 544), (cWidth: 1280; cHeight: 720));
{ TOpenCVCameraThread }
procedure TocvCameraThread.Execute;
Var
frame: pIplImage;
begin
while not Terminated do
if Assigned(FCapture) then
begin
try
frame := cvQueryFrame(FCapture);
if Assigned(frame) then
begin
if Assigned(OnNotifyData) then
Synchronize(
procedure
begin
OnNotifyData(frame);
end);
Sleep(ThreadSleepConst);
end;
except
end;
end
else
Suspend;
end;
{ TOpenCVCamera }
constructor TocvCamera.Create(AOwner: TComponent);
begin
inherited;
// if not(csDesigning in ComponentState) then
begin
FOpenCVCameraThread := TocvCameraThread.Create(True);
// FOpenCVCameraThread.Priority := tpHigher;
FOpenCVCameraThread.OnNotifyData := OnNotifyData;
FEnabled := False;
FResolution := r160x120;
end;
end;
destructor TocvCamera.Destroy;
begin
TerminateCameraThread;
ReleaseCamera;
inherited;
end;
procedure TocvCamera.ReleaseCamera;
begin
if Assigned(FCapture) then
begin
cvReleaseCapture(FCapture);
FCapture := nil;
end;
end;
procedure TocvCamera.TerminateCameraThread;
begin
if Assigned(FOpenCVCameraThread) then
begin
FOpenCVCameraThread.Terminate;
FOpenCVCameraThread.Resume;
FOpenCVCameraThread.WaitFor;
FOpenCVCameraThread.Free;
FOpenCVCameraThread := Nil;
end;
end;
procedure TocvCamera.OnNotifyData(const IplImage: pIplImage);
begin
NotifyReceiver(IplImage);
end;
procedure TocvCamera.SetCameraCaptureSource(const Value: TocvCameraCaptureSource);
Var
isEnabled: Boolean;
begin
if FCameraCaptureSource <> Value then
begin
isEnabled := Enabled;
if Assigned(FCapture) and FEnabled then
Enabled := False;
FCameraCaptureSource := Value;
Enabled := isEnabled;
end;
end;
procedure TocvCamera.SetEnabled(const Value: Boolean);
begin
if FEnabled <> Value then
begin
// if not(csDesigning in ComponentState) then
begin
if Assigned(FCapture) and FEnabled then
begin
FOpenCVCameraThread.Suspend;
FOpenCVCameraThread.FCapture := nil;
cvReleaseCapture(FCapture);
FCapture := Nil;
end;
if Value then
begin
FCapture := cvCreateCameraCapture(ocvCameraCaptureSource[FCameraCaptureSource]);
SetCameraResolution;
FOpenCVCameraThread.FCapture := FCapture;
FOpenCVCameraThread.Resume;
end;
end;
FEnabled := Value;
end;
end;
procedure TocvCamera.SetCameraResolution;
begin
cvSetCaptureProperty(
FCapture,
CV_CAP_PROP_FRAME_WIDTH,
CameraResolution[FResolution].cWidth);
cvSetCaptureProperty(
FCapture,
CV_CAP_PROP_FRAME_HEIGHT,
CameraResolution[FResolution].cHeight);
end;
procedure TocvCamera.setResolution(const Value: TocvResolution);
begin
if FResolution <> Value then
begin
FResolution := Value;
if Enabled then
begin
Enabled := False;
Enabled := True;
end;
end;
end;
end.
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