A Simple and Powerful Game Engine

//DirectShow.cpp

/********************************************************

Description: Game Direct Show

Date: 1/7/2007

Auther: Shalom Keller

Contact: szkeller@gmail.com

Note:	If you find any bugs or you think that some thing 
		is wrong, Please send me an e-mail on it.

********************************************************/


#include <AfxWin.h>
//#include <Windows.h>// If you replace the code that uses MFC, you can include Windows.h instead of AfxWin.h
#include <dshow.h>
#include "DirectShow.h"
#include "DirectX3D.h"
#include "WinMain.h"


///////////////////////////////////////
//
///////////////////////////////////////
CDirectShow::CDirectShow()
{
	m_pGraph			=0;
	m_pMediaControl		=0;
	m_pVidWin			=0;
	m_pEvent			=0;
}
///////////////////////////////////////
//
///////////////////////////////////////
BOOL CDirectShow::Play(LPCWSTR lpwstrFile,HWND hWnd)
{
    CoInitialize(NULL);

	HRESULT ret;
	//-----------------------------------
    // Create the filter graph manager.
    CoCreateInstance(CLSID_FilterGraph,
		NULL,
		CLSCTX_INPROC, 
        IID_IGraphBuilder,
		(void **)&m_pGraph);

	if(!m_pGraph)
	{
		DisplayErrorMessage("CDirectShow::Play !IID_IGraphBuilder");
		return FALSE;
	}
	//-----------------------------------
	//Get a Media Control Interface.
    m_pGraph->QueryInterface(
		IID_IMediaControl,
		(void **)&m_pMediaControl);

	if(!m_pMediaControl)
	{
		DisplayErrorMessage("CDirectShow::Play !IID_IMediaControl");
		return FALSE;
	}
	//-----------------------------------
	//Get a Media Event Interface.
	m_pGraph->QueryInterface(
		IID_IMediaEvent,
		(void **)&m_pEvent);

	if(!m_pEvent)
	{
		DisplayErrorMessage("CDirectShow::Play !IID_IMediaEvent");
		return FALSE;
	}
	//-----------------------------------
	//Get a Video Window Interface.
	m_pGraph->QueryInterface(
		IID_IVideoWindow, 
		(void **)&m_pVidWin);

	if(!m_pVidWin)
	{
		DisplayErrorMessage("CDirectShow::Play !IID_IVideoWindow");
		return FALSE;
	}
	//-----------------------------------
    // Build the graph. 
	ret=m_pGraph->RenderFile(
		lpwstrFile, 
		NULL);
	if(ret!=S_OK)
	{
		DisplayDirectXErrorCode(ret);
		DisplayErrorMessage("CDirectShow::Play RenderFile");
		return FALSE;
	}
	//-----------------------------------

    //Set the Video window.
    ret=m_pVidWin->put_Owner(
		(OAHWND)hWnd);

	if(ret!=S_OK)
	{
		DisplayDirectXErrorCode(ret);
		DisplayErrorMessage("CDirectShow::Play put_Owner");
		return FALSE;
	}
	//-----------------------------------
	//Set Window Style.
    ret=m_pVidWin->put_WindowStyle(
		WS_CHILD | WS_CLIPSIBLINGS);

	if(ret!=S_OK)
	{
		DisplayDirectXErrorCode(ret);
		DisplayErrorMessage("CDirectShow::Play put_WindowStyle");
		return FALSE;
	}
	//-----------------------------------
	//Set Window Position
    RECT grc;
    GetClientRect(hWnd, &grc);
    ret=m_pVidWin->SetWindowPosition(0, 
								0,
								grc.right, 
								grc.bottom);
	if(ret!=S_OK)
	{
		DisplayDirectXErrorCode(ret);
		DisplayErrorMessage("CDirectShow::Play SetWindowPosition");
		return FALSE;
	}
	//-----------------------------------
    // Run the graph.
    ret=m_pMediaControl->Run();

	if(ret!=S_OK)//Try Again.
	{
		::Sleep(2*1000);//Aleep for 2 seconds.
		// Run the graph.
		ret=m_pMediaControl->Run();
	}

	if(ret!=S_OK)
	{
		DisplayDirectXErrorCode(ret);
		DisplayErrorMessage("CDirectShow::Play Run");
		return FALSE;
	}
	//-----------------------------------
	//Don't Continue until the video is finish.
	long EvCode;
	MSG msg;
	while(1)
	{
		ret=m_pEvent->WaitForCompletion(
			10,//INFINITE
			&EvCode);

		if( ret==E_ABORT )
		{
			if( PeekMessage( &msg, NULL, 0, 0, PM_NOREMOVE ) )
			{
				if( !GetMessage( &msg, NULL, 0, 0 ) )
					return msg.wParam;

				TranslateMessage(&msg); 
				DispatchMessage(&msg);
			}
		}
		else if(ret!=S_OK)
		{
			DisplayErrorMessage("CDirectShow::Play WaitForCompletion");
			DisplayDirectXErrorCode(ret);
			return FALSE;
		}
		else if( ret==S_OK)
		{
			break;
		}
	}
	
	//-----------------------------------
	return TRUE;
}
///////////////////////////////////////
//
///////////////////////////////////////
void CDirectShow::Release()
{
	//-----------------------------------
    if(m_pVidWin)
		m_pVidWin->put_Visible(OAFALSE);
    if(m_pVidWin)
		m_pVidWin->put_Owner(NULL);
    if(m_pMediaControl)
		m_pMediaControl->Release();
    if(m_pVidWin)
		m_pVidWin->Release();
    if(m_pEvent)
		m_pEvent->Release();
    if(m_pGraph)
		m_pGraph->Release();

	m_pGraph			=NULL;
	m_pMediaControl		=NULL;
	m_pVidWin			=NULL;
	m_pEvent			=NULL;
	//-----------------------------------
}
///////////////////////////////////////
//
///////////////////////////////////////
bool CDirectShow::Stop()
{
	if(!m_pMediaControl)
		return false;

	HRESULT hr;

	hr = m_pMediaControl->Stop();

	if(hr!=S_OK)
	{
		DisplayErrorMessage("CDirectShow::Stop");
		DisplayDirectXErrorCode(hr);
		return FALSE;
	}

	return true;
}