wav格式音频文件播放并显示波形

// WaveView.cpp : implementation file // #include "stdafx.h" #include "Define.h" #include "WaveView.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif ///////////////////////////////////////////////////////////////////////////// // CWaveView IMPLEMENT_DYNCREATE(CWaveView, CView) CWaveView::CWaveView() { //各个画笔的颜色 m_crBkground = RGB(0, 0, 0); m_crPosLine = RGB(255, 255, 255); m_crCurPosLine=RGB(255, 255, 0); m_crMidLine = RGB(0, 0, 255); m_crWaveForm = RGB(24, 243, 173); //波形显示控制 WaveSetVShowRange(30000); WaveSetShowRange(0, 0); WaveSetMark(0, 0); WaveSetHScale(1); WaveSetVScale(1); m_bOnMark = FALSE; //波形播放/录制控制 m_bOnPlay = FALSE; m_bOnRecord= FALSE; //合成控制 m_crSepStart = RGB(0, 100, 255); m_crSepEnd = RGB(225, 100, 155); m_bShowSep = FALSE; m_bOnWaveDrag = FALSE; m_bOnSepDrag = FALSE; } CWaveView::~CWaveView() { //清空位图 m_bmpWaveForm.DeleteObject(); } BEGIN_MESSAGE_MAP(CWaveView, CView) //{{AFX_MSG_MAP(CWaveView) ON_WM_CREATE() ON_WM_SIZE() ON_WM_ERASEBKGND() ON_WM_LBUTTONDOWN() ON_WM_LBUTTONUP() ON_WM_MOUSEMOVE() ON_WM_LBUTTONDBLCLK() ON_MESSAGE(WM_WAVECHANGED,OnWaveChanged) ON_MESSAGE(MM_WOM_DONE, OnWaveDone) ON_WM_TIMER() ON_WM_DESTROY() ON_WM_RBUTTONDOWN() ON_WM_RBUTTONUP() //}}AFX_MSG_MAP END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CWaveView diagnostics #ifdef _DEBUG void CWaveView::AssertValid() const { CView::AssertValid(); } void CWaveView::Dump(CDumpContext& dc) const { CView::Dump(dc); } #endif //_DEBUG ///////////////////////////////////////////////////////////////////////////// // CWaveView message handlers /////////////////////////////////////////////////////////////////////////////////// // // 用于语音波形显示控制 // /////////////////////////////////////////////////////////////////////////////////// void CWaveView::WaveSetMark(long lStart, long lEnd) { //ASSERT(lStart>=0 && lStart<=m_tWaveShowRange.end && lEnd>=0 && lEnd<=m_tWaveShowRange.end); ASSERT(lStart>=0 && lEnd>=0); m_tWaveMark.start = lStart; m_tWaveMark.end = lEnd; } void CWaveView::WaveGetMark(long *plStart, long *plEnd) { if( m_tWaveMark.start<m_tWaveMark.end ) { *plStart = m_tWaveMark.start; *plEnd = m_tWaveMark.end; } else { *plStart = m_tWaveMark.end; *plEnd = m_tWaveMark.start; } } void CWaveView::WaveGetShowRange(long *plStart, long *plEnd) { *plStart = m_tWaveShowRange.start; *plEnd = m_tWaveShowRange.end; } void CWaveView::WaveSetShowRange(long lStart, long lEnd) { m_tWaveShowRange.start = lStart; m_tWaveShowRange.end = lEnd; } void CWaveView::WaveSetHScale(float fHScale) { m_fWaveHScale = fHScale; } float CWaveView::WaveGetHScale() { return m_fWaveHScale; } void CWaveView::WaveSetVScale(float fVScale) { m_fWaveVScale = fVScale; } float CWaveView::WaveGetVScale() { return m_fWaveVScale; } long CWaveView::WaveGetLength() { return m_WaveFile.GetWaveLength(); } int CWaveView::WaveGetChannels() { return m_WaveFile.GetChannels(); } BOOL CWaveView::WaveGetLeftChannelShow() { return TRUE; } BOOL CWaveView::WaveGetRightChannelShow() { return m_WaveFile.GetChannels()==2; } void CWaveView::WaveSetLeftChannelShow(BOOL bShow) { } void CWaveView::WaveSetRightChannelShow() { } byte* CWaveView::WaveGetChannelData(int nChannel) { return m_WaveFile.GetChannelData(nChannel); } byte* CWaveView::WaveGetWaveData() { return m_WaveFile.GetWaveData(); } void CWaveView::WaveSetVShowRange(float fRange) { m_fWaveVShowRange = fRange; } float CWaveView::WaveGetVShowRange() { return m_fWaveVShowRange; } int CWaveView::WaveGetBitsPerSample() { return m_WaveFile.GetBitsPerSample(); } int CWaveView::WaveGetSamplesPerSec() { return m_WaveFile.GetSamplesPerSec(); } int CWaveView::WaveChangePosToShow(long pos) { long ShowStart,ShowEnd; WaveGetShowRange(&ShowStart,&ShowEnd); float fScale = WaveGetHScale(); return (int)((float)(pos-ShowStart)/fScale); } /////////////////////////////////////////////////////////////////////////////////// // // 用于语音波形播放控制 // /////////////////////////////////////////////////////////////////////////////////// // // WaveCurrentPosChange - 改变当前播放位置显示 orgpos -> pos // void CWaveView::WaveCurrentPosChange(int orgpos, int pos) { DrawPosLine(orgpos); DrawPosLine(pos); } // // WavePlay - 播放波形 // BOOL CWaveView::WavePlay() { byte* pBuffer; int nChannel; if( WaveGetLeftChannelShow() ) { if( WaveGetRightChannelShow() ) { //播放两个声道的数据 pBuffer = WaveGetWaveData(); nChannel = WaveGetChannels(); } else { //播放左声道的数据 pBuffer = WaveGetChannelData(0); nChannel = 1; } } else { if( WaveGetRightChannelShow() ) { //播放右声道的数据 pBuffer = WaveGetChannelData(1); nChannel = 1; } else { //没有任何数据，直接退出 pBuffer = NULL; } } if( pBuffer ) { long BufLen; long MarkStart,MarkEnd,ShowStart,ShowEnd; WaveGetMark(&MarkStart,&MarkEnd); WaveGetShowRange(&ShowStart,&ShowEnd); if(MarkEnd!=MarkStart) BufLen=MarkEnd-MarkStart; else BufLen=ShowEnd-MarkStart; if(BufLen==0) return FALSE; //保存位置(开始播放,播放) m_lPlayStartPos = MarkStart; m_lPlayPos = MarkStart; //开始播放 MarkStart *= WaveGetBitsPerSample()/8*nChannel; BufLen *= WaveGetBitsPerSample()/8*nChannel; m_WavePlay.Open(m_hWnd, WaveGetSamplesPerSec(), nChannel, WaveGetBitsPerSample()); m_WavePlay.PlayData(pBuffer+MarkStart, BufLen); m_bOnPlay = TRUE; DrawPosLine(WaveChangePosToShow(m_lPlayStartPos)); SetTimer(TIMER_WAVE_PLAY, TIME_LONG_WAVE_PLAY, NULL); return TRUE; } else return FALSE; } // // WaveRecord - 录制波形 // BOOL CWaveView::WaveRecord() { return FALSE; } // // WaveStop - 停止播放 // BOOL CWaveView::WaveStop() { if( m_bOnRecord ) { m_WavePlay.WaveInGetPosition(); m_WavePlay.InStop(); m_WavePlay.InClose(); int Bits = WaveGetBitsPerSample()/8*WaveGetChannels(); long WavePos = m_WavePlay.GetRecordBytes()/Bits; m_WaveFile.SetWaveLength(WavePos); //必须重新分配声道数据 m_WaveFile.FillChannelData(); m_bOnRecord = FALSE; //显示波形 WaveSetShowRange(0,WavePos); SendMessage(WM_WAVECHANGED, 0, 0); Invalidate(); UpdateWindow(); return TRUE; } else if( m_bOnPlay ) { m_WavePlay.Stop(); m_WavePlay.Close(); return TRUE; } return FALSE; } // // WavePause - 暂停播放/录制 // BOOL CWaveView::WavePause() { if( m_bOnPlay ) { m_WavePlay.Pause(); } return FALSE; } // // OnWaveDone - 播放/录制完成(响应MM_WOM_DONE消息) // long CWaveView::OnWaveDone(WPARAM,LPARAM) { KillTimer(TIMER_WAVE_PLAY); if( m_bOnPlay ) { //停止播放 m_WavePlay.Stop(); m_WavePlay.Close(); m_bOnPlay = FALSE; //显示当前播放位置 long orgplaypos = m_lPlayPos; int orgshowpos = WaveChangePosToShow(orgplaypos); long curpos = m_lPlayStartPos; int curshowpos = WaveChangePosToShow(curpos); WaveCurrentPosChange(orgshowpos, curshowpos); DrawPosLine(curshowpos); return TRUE; } else if( m_bOnRecord ) { m_WavePlay.WaveInGetPosition(); m_WavePlay.InStop(); m_WavePlay.InClose(); int Bits = WaveGetBitsPerSample()/8*WaveGetChannels(); long WavePos=m_WavePlay.GetRecordBytes()/Bits; m_WaveFile.SetWaveLength(WavePos); //必须重新分配声道数据 m_WaveFile.FillChannelData(); m_bOnRecord = FALSE; //显示波形 WaveSetShowRange(0,WavePos); SendMessage(WM_WAVECHANGED, 0, 0); Invalidate(); UpdateWindow(); } return 0; } // // OnTimer - 响应时钟消息 // TIMER_WAVE_PLAY 用于改变当前波形播