aviplayerview.cpp

这是一个编程开发用的AVI的播放器对初学者有启发作用

// AVIPlayerView.cpp : implementation of the CAVIPlayerView class
//

#include "stdafx.h"
#include "AVIPlayer.h"

#include "AVIPlayerDoc.h"
#include "AVIPlayerView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CAVIPlayerView

IMPLEMENT_DYNCREATE(CAVIPlayerView, CView)

BEGIN_MESSAGE_MAP(CAVIPlayerView, CView)
	//{{AFX_MSG_MAP(CAVIPlayerView)
	ON_WM_PAINT()
	ON_WM_TIMER()
	ON_COMMAND(ID_PLAY, OnPlay)
	ON_COMMAND(ID_PAUSE, OnPause)
	ON_COMMAND(ID_STOP, OnStop)
	ON_UPDATE_COMMAND_UI(ID_PLAY, OnUpdatePlay)
	ON_UPDATE_COMMAND_UI(ID_PAUSE, OnUpdatePause)
	ON_UPDATE_COMMAND_UI(ID_STOP, OnUpdateStop)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CAVIPlayerView construction/destruction

CAVIPlayerView::CAVIPlayerView()
{
	// TODO: add construction code here
	m_bPaused = FALSE;
	m_bPlaying = FALSE;
}

CAVIPlayerView::~CAVIPlayerView()
{
}

BOOL CAVIPlayerView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CAVIPlayerView drawing

void CAVIPlayerView::OnDraw(CDC* pDC)
{
	CAVIPlayerDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
}

/////////////////////////////////////////////////////////////////////////////
// CAVIPlayerView printing

BOOL CAVIPlayerView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CAVIPlayerView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CAVIPlayerView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CAVIPlayerView diagnostics

#ifdef _DEBUG
void CAVIPlayerView::AssertValid() const
{
	CView::AssertValid();
}

void CAVIPlayerView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CAVIPlayerDoc* CAVIPlayerView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CAVIPlayerDoc)));
	return (CAVIPlayerDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CAVIPlayerView message handlers

void CAVIPlayerView::OnPaint() 
{
	CPaintDC dc(this); // device context for painting
	
	// TODO: Add your message handler code here
	CAVIPlayerDoc* pDoc=GetDocument();
	if(pDoc->m_bOpened)
	{
		//得到当前要播放的帧的图象数据
		AVIStreamRead(
			pDoc->m_pStream, 
			pDoc->m_nCurFrame,     
			1,   
			pDoc->m_lpBuffer, 
			pDoc->m_strtInfo.bmiHeader.biSizeImage,   
			NULL,
			NULL);

		//显示
		SetDIBitsToDevice(dc.m_hDC,    //DIB将输出的设备描述表 
        0,		 //设备描述表中位图输出起始逻辑X坐标 
        0,       //设备描述表中位图输出起始逻辑Y坐标 
        pDoc->m_nWidth,   //DIB的宽度 
        pDoc->m_nHeight,   //DIB的高度 
        0,      //DIB开始读取输出的象素数据的X位置 
        0,      //DIB开始读取输出的象素数据的Y位置 
        0,      //DIB中象素的水平行号,它对应lpBits内存缓冲区第一行数据 
        pDoc->m_nHeight,   //DIB的行数,对应包含在由lpBits所指内存缓冲区中的数据 
        pDoc->m_lpBuffer,     //包含象素数据的内存缓冲区的指针 
        &pDoc->m_strtInfo,//指向初始化了的BITMAPINFO数据结构的指针, 
       						//描述了位图的大小和色彩数据 
        DIB_RGB_COLORS);  //指定是显示的颜色 
	}
	// Do not call CView::OnPaint() for painting messages
}

void CAVIPlayerView::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	CAVIPlayerDoc* pDoc=GetDocument();

	if(pDoc->m_bOpened && nIDEvent == IDEVENTPLAY)
	{
		// 已打开了一个AVI文件并且是特定的定时器事件
		pDoc->m_nCurFrame++;
		if (pDoc->m_nCurFrame >= pDoc->m_nFrame)
			pDoc->m_nCurFrame = 0;
		pDoc->UpdateAllViews(NULL,0,0);
	}

	CView::OnTimer(nIDEvent);
}

void CAVIPlayerView::OnPlay() 
{
	// TODO: Add your command handler code here
	m_bPlaying = TRUE;

	//启动定时器
	this->Invalidate();
	SetTimer(IDEVENTPLAY,(UINT)(1000.0 / GetDocument()->m_nRate),NULL);
}

void CAVIPlayerView::OnPause() 
{
	// TODO: Add your command handler code here
	m_bPaused = !m_bPaused;
	if (!m_bPaused)
		OnPlay();
	else
		KillTimer(IDEVENTPLAY);
}

void CAVIPlayerView::OnStop() 
{
	// TODO: Add your command handler code here
	KillTimer(IDEVENTPLAY);
	GetDocument()->m_nCurFrame = 0;
	m_bPlaying = FALSE;
	m_bPaused = FALSE;
}

void CAVIPlayerView::OnUpdatePlay(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(GetDocument()->m_bOpened && !m_bPlaying);
}

void CAVIPlayerView::OnUpdatePause(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(GetDocument()->m_bOpened && m_bPlaying);
}

void CAVIPlayerView::OnUpdateStop(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(GetDocument()->m_bOpened && m_bPlaying);
}

void CAVIPlayerView::Play(int nFrame)
{

}