SimpleDirectShowAcq.cpp

/****************************************************************************	
*	Operator Console - an extensible user interface for the Imatest IT 		*
*	library																	*
*	Copyright (C) 2013 Imatest LLC.											*
*																			*
*	This program is free software: you can redistribute it and/or modify	*
*	it under the terms of the GNU General Public License as published by	*
*	the Free Software Foundation, either version 3 of the License, or		*
*	(at your option) any later version.										*
*																			*
*	This program is distributed in the hope that it will be useful,			*
*	but WITHOUT ANY WARRANTY; without even the implied warranty of			*
*	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the			*
*	GNU General Public License for more details.							*
*																			*
*	You should have received a copy of the GNU General Public License		*
*	along with this program.  If not, see <http://www.gnu.org/licenses/>. 	*
****************************************************************************/

#include "stdafx.h"
#include "escapi21\escapi.h"
#include "SimpleDirectShowAcq.h"
#include "ThreadControl.h"

SimpleDirectShowAcq::SimpleDirectShowAcq(void)
{
	m_width     = 0;
	m_height    = 0;
	m_numBytes  = 0;
	m_numPixels = 0;
	m_buf       = NULL;
}


SimpleDirectShowAcq::~SimpleDirectShowAcq(void)
{
}
///
/// @return Returns the value of m_inited after initialization, e.g. returns TRUE if the camera is successfully initialized
///
bool SimpleDirectShowAcq::Open()
{
	struct SimpleCapParams	params;
	bool					success = false;


	if (m_width == 0 || m_height == 0)	// these get set in Init()
	{
		m_logMsg = "Unable to Open camera:  width and height are not set.";
	}
	else
	{
		m_numCameras = setupESCAPI();

		if (m_numCameras == 0)
		{
			m_logMsg.Format("%s: no cameras found.\n", __FUNCTION__);
		}
		else
		{
			params.mWidth     = m_width;
			params.mHeight    = m_height;
			params.mTargetBuf = (int *)m_buf;	// m_buf gets set in Init()
			m_cameraIndex     = 0;
			
			if (initCapture(m_cameraIndex, &params))
			{
				m_inited = true;	// assigning it here avoids an annoying compiler warning
			}
		}
	}

	return m_inited;
}


///
/// @return Returns TRUE upon completion
///
bool SimpleDirectShowAcq::Close()
{
	if (m_inited)
	{
		deinitCapture(m_cameraIndex);
	}

	return true;
}

///
/// @return Returns TRUE upon completion
///
bool SimpleDirectShowAcq::CaptureFrame()
{
	doCapture(m_cameraIndex);

	while (!isCaptureDone(m_cameraIndex))	// captures into m_buf
	{
		Sleep(1);
	}

	return true;
}