dshow.cpp

歌词制作工具 简单的歌词5555566666

#include "StdAfx.h"
#include ".\dshow.h"

CDShow::CDShow(void)
{	
}

CDShow::~CDShow(void)
{	
}

void CDShow::Init()
{
	m_pGraph = NULL;
	m_pMediaControl = NULL;
	m_pMediaPosition = NULL;
	g_pBaseAudio=NULL;
	CoInitialize(NULL);
	CoCreateInstance(CLSID_FilterGraph, NULL,
                   CLSCTX_INPROC, IID_IGraphBuilder, (void**)&m_pGraph);
	m_pGraph->QueryInterface(IID_IMediaControl, (void**)&m_pMediaControl);
	m_pGraph->QueryInterface(IID_IMediaPosition, (void**)&m_pMediaPosition);
	m_pGraph->QueryInterface(IID_IBasicAudio,   (void**)&g_pBaseAudio); 
}

void CDShow::Load(char *szSoundFileName,HWND hwnd)
{
	MultiByteToWideChar(CP_ACP, 0, szSoundFileName, -1, wstrSoundPath, MAX_PATH);
	m_pGraph->RenderFile(wstrSoundPath, NULL);
	m_pMediaPosition->put_CurrentPosition(0);
	m_pMediaPosition->get_Rate(&rate);
}

void CDShow::Stop()
{
	m_pMediaControl->Stop();
}

void CDShow::play()
{
	
	m_pMediaControl->Run();
}

void CDShow::SetV(long v)
{
	if(g_pBaseAudio)
		g_pBaseAudio->put_Volume(v);
}

void CDShow::pause()
{
	m_pMediaControl->Pause();
}

void CDShow::setTime(int time)
{
	m_pMediaControl->Stop();
	m_pMediaPosition->put_CurrentPosition(time);
	m_pMediaControl->Run();	
}

int CDShow::GetAllTime()
{
	if(m_pMediaPosition)
	{
		REFTIME AllTime;
		m_pMediaPosition->get_Duration(&AllTime);		
		return (int)AllTime;
	}
	return -1;
}

int CDShow::GetPosTime()
{
	if(m_pMediaPosition)
	{
		REFTIME PosTime;
		m_pMediaPosition->get_CurrentPosition(&PosTime);
		return (int)PosTime;
	}
	return -2;
}

void CDShow::Release()
{
	if(m_pMediaControl!=NULL)
	{
		m_pMediaControl->Stop();
	}
	SafeRelease(m_pMediaControl)
	SafeRelease(m_pMediaPosition)
	SafeRelease(m_pGraph)
	SafeRelease(g_pBaseAudio)
	CoUninitialize();
}

double CDShow::GetRate()
{		
	return rate;
}