canvasframe.cpp

DirectX 组件中的DirectSound程序编写方法

// canvasFrame.cpp : implementation file
//

#include "stdafx.h"
#include "canvasr.h"
#include "canvasFrame.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// canvasFrame

IMPLEMENT_DYNCREATE(canvasFrame, CFrameWnd)

LPDIRECTDRAW7              pDD7;  
LPDIRECTDRAWSURFACE7       pPSur; 
LPDIRECTDRAWSURFACE7       pBBuf;
LPDIRECTDRAWSURFACE7	   pOPla[8];
DDSCAPS2  caps;                 
DDSURFACEDESC2             desc; 
HRESULT result;                
DDCOLORKEY key;				
int i;
LPDIRECTSOUND pDS;      
LPDIRECTSOUNDBUFFER pPBuf; 
LPDIRECTSOUNDBUFFER pSBuf[2];  
WAVEFORMATEX pwfmt;    
WAVEFORMATEX swfmt;     
DSBUFFERDESC dsdesc;    
MMCKINFO      ckRiff;    
MMCKINFO      ckInfo;    
MMRESULT	  mmresult;  
HMMIO hmmio;              
DWORD size;              
LPVOID pAudio;
DWORD bytesAudio;
canvasFrame::canvasFrame()
{
	hdc = ::CreateCompatibleDC(NULL);
	Create(NULL,"绘图视窗",WS_POPUP);
	pSBuf[0] = createbuffer("bground.wav"); 
	pSBuf[1] = createbuffer("foot.wav"); 
	pSBuf[0]->Play(0,0,1); 
}

void canvasFrame::ColorKey(int i)
{
	key.dwColorSpaceHighValue = 0x001f;
	key.dwColorSpaceLowValue = 0x001f;
	pOPla[i]->SetColorKey(DDCKEY_SRCBLT,&key);
	return;
}
canvasFrame::~canvasFrame()
{
	delete hdc;
	delete hdc1;
	delete bitmap;
	pDD7->Release();
	pPSur->Release();
	for(i=0;i<8;i++)
		pOPla[i]->Release();
	pDS->Release();
	pPBuf->Release();
	for(i=0;i<1;i++)
		pSBuf[i]->Release();
}


BEGIN_MESSAGE_MAP(canvasFrame, CFrameWnd)
	//{{AFX_MSG_MAP(canvasFrame)
	ON_WM_CREATE()
	ON_WM_CHAR()
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// canvasFrame message handlers

int canvasFrame::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
    result = DirectDrawCreateEx(NULL, (VOID**)&pDD7, IID_IDirectDraw7, NULL);

    if (result != DD_OK)
		MessageBox("建立DirectDraw对象失败!");
	result = pDD7->SetCooperativeLevel(m_hWnd,DDSCL_EXCLUSIVE |
			         DDSCL_FULLSCREEN|DDSCL_ALLOWREBOOT );

	if(result !=DD_OK)
		MessageBox("设定程序协调层级失败!");
	result = pDD7->SetDisplayMode(640,480,16,0,DDSDM_STANDARDVGAMODE); 

	if(result !=DD_OK)
		MessageBox("设定屏幕显示模式失败!");
	memset(&desc,0,sizeof(desc));       
	desc.dwSize = sizeof(desc);           
	desc.dwFlags = DDSD_CAPS | DDSD_BACKBUFFERCOUNT;
	desc.dwBackBufferCount = 1;        
	desc.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE | DDSCAPS_COMPLEX | DDSCAPS_FLIP;
	result = pDD7->CreateSurface(&desc,&pPSur,NULL);

	if(result !=DD_OK)
	 	MessageBox("建立主绘图页失败!");
	caps.dwCaps = DDSCAPS_BACKBUFFER;  
	result = pPSur->GetAttachedSurface(&caps,&pBBuf); 

	if(result !=DD_OK)
		MessageBox("连接后缓冲区失败!");
	memset(&desc,0,sizeof(desc));        
	desc.dwSize = sizeof(desc);
	desc.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH; 
	desc.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN ;
	desc.dwWidth = 640; 
	desc.dwHeight = 480; 
	char file[10];
	char num[5];
	for(i=0;i<=7;i++)
	{
		result = pDD7->CreateSurface(&desc, &pOPla[i], NULL); 

		if(result !=DD_OK)
  			MessageBox("建立幕後暂存区失败!");
		ColorKey(i);  
		sprintf( file , "b%d.bmp" , i ); 
		bitmap = (HBITMAP)::LoadImage(NULL,file,IMAGE_BITMAP,640,480,LR_LOADFROMFILE); 
		if(bitmap==NULL)
			MessageBox("无法载入点阵图!");
		::SelectObject(hdc,bitmap);     
		pOPla[i]->GetDC( &hdc1 );          
		::BitBlt( hdc1 , 0 , 0 , 640 , 480 , hdc , 0 , 0 , SRCCOPY );
   		sprintf( num , "第 %d 张图" , i ); 
		::TextOut(hdc1, 0, 0, num, lstrlen(num));  
		pOPla[i]->ReleaseDC( hdc1 );    
	}
	SetTimer(1,300,NULL); 
	i=0;                  
    result = DirectSoundCreate( NULL, &pDS, NULL ); 
	if(result != DS_OK)
		MessageBox("建立 DirectSound 物件失败!");
    result = pDS->SetCooperativeLevel( m_hWnd, DSSCL_PRIORITY );
	if(result != DS_OK)
		MessageBox("设定协调层级失败!");
    memset( &dsdesc,0, sizeof(dsdesc) );        
    dsdesc.dwSize        = sizeof(dsdesc);      
    dsdesc.dwFlags       = DSBCAPS_PRIMARYBUFFER;
    dsdesc.dwBufferBytes = 0;
    dsdesc.lpwfxFormat   = NULL;
    result = pDS->CreateSoundBuffer( &dsdesc, &pPBuf, NULL );
	if(result != DS_OK)
		MessageBox("建立主缓冲区失败!");
    memset( &pwfmt,0, sizeof(pwfmt) );
    pwfmt.wFormatTag      = WAVE_FORMAT_PCM;
    pwfmt.nChannels       = 2;           
    pwfmt.nSamplesPerSec  = 44100;       
    pwfmt.wBitsPerSample  = 16;            
    pwfmt.nBlockAlign     = pwfmt.wBitsPerSample / 8 * pwfmt.nChannels;
    pwfmt.nAvgBytesPerSec = pwfmt.nSamplesPerSec * pwfmt.nBlockAlign;
    result = pPBuf->SetFormat(&pwfmt);      
	if(result != DS_OK)
		MessageBox("设定播放格式失败!");
	return 0;
}

void canvasFrame::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	CFrameWnd::OnChar(nChar, nRepCnt, nFlags);
	if( nChar== VK_ESCAPE )  
		PostMessage(WM_CLOSE ); 
}

void canvasFrame::OnTimer(UINT nIDEvent) 
{
	CFrameWnd::OnTimer(nIDEvent);
	if(i==7)
		i=0;
	if(i==1 || i==4)  
		pSBuf[1]->Play(0,0,0);  
	pBBuf->BltFast( 0 , 0 , pOPla[7], CRect(0,0,640,480) , DDBLTFAST_WAIT); 
	pBBuf->BltFast( 0 , 0 , pOPla[i], CRect(0,0,640,480) , DDBLTFAST_WAIT|DDBLTFAST_SRCCOLORKEY );

	pPSur->Flip( NULL , DDFLIP_WAIT );
	i++;
}

LPDIRECTSOUNDBUFFER canvasFrame::createbuffer(char* filename)
{	
	LPDIRECTSOUNDBUFFER buf;
	hmmio = mmioOpen(filename, NULL, MMIO_ALLOCBUF|MMIO_READ );

	if(hmmio == NULL)                         
		MessageBox("文件不存在!");
	ckRiff.fccType = mmioFOURCC('W', 'A', 'V', 'E');

	mmresult = mmioDescend(hmmio,&ckRiff,NULL,MMIO_FINDRIFF);

	if(mmresult != MMSYSERR_NOERROR)
		MessageBox("档案格式错误!");
	ckInfo.ckid = mmioFOURCC('f','m','t',' ');  
	mmresult = mmioDescend(hmmio,&ckInfo,&ckRiff,MMIO_FINDCHUNK);
	//搜寻区块
	if(mmresult != MMSYSERR_NOERROR)
		MessageBox("文件格式错误!");
	if(mmioRead(hmmio,(HPSTR)&swfmt,sizeof(swfmt)) == -1)
		MessageBox("读取格式失败!");
	mmresult = mmioAscend(hmmio,&ckInfo,0);    
	ckInfo.ckid = mmioFOURCC('d','a','t','a');  
	mmresult = mmioDescend(hmmio,&ckInfo,&ckRiff,MMIO_FINDCHUNK);

	if(mmresult != MMSYSERR_NOERROR)
		MessageBox("文件格式错误!");
	size = ckInfo.cksize;                   
	memset( &dsdesc,0,sizeof(dsdesc)); 
    dsdesc.dwSize  = sizeof(dsdesc);   
    dsdesc.dwFlags = 	 DSBCAPS_STATIC |DSBCAPS_CTRLPAN |DSBCAPS_CTRLVOLUME| DSBCAPS_GLOBALFOCUS;
    dsdesc.dwBufferBytes = size;     
    dsdesc.lpwfxFormat   = &swfmt;     
    result = pDS->CreateSoundBuffer( &dsdesc, &buf, NULL );
	if(result != DS_OK)
		MessageBox("建立次缓冲区失败!");

	result = buf->Lock(0,size,&pAudio,&bytesAudio,NULL,NULL,NULL);

	if(result != DS_OK)
		MessageBox("锁定缓冲区失败!");
	mmresult = mmioRead(hmmio,(HPSTR)pAudio,bytesAudio);

	if(mmresult == -1)
		MessageBox("读取音效文件失败!");
	result = buf->Unlock(pAudio,bytesAudio,NULL,NULL);

	if(result != DS_OK)
		MessageBox("解除锁定缓冲区失败!");
	mmioClose(hmmio,0);
	return buf;
}