CMusic.cpp

#include "StdAfx.h"
#include "CMusic.h"

string CMusic::ALIAS_NAME = "MEDIA_MP3";

CMusic::CMusic()
{
	isOpen = false;
	setMediaName("Vertigo.mp3");

	open_cmd = "OPEN " + mediaName + " TYPE MPEGVideo ALIAS " + ALIAS_NAME;
	status_cmd = "status " + ALIAS_NAME + " mode";
	play_cmd = "PLAY " + ALIAS_NAME + " FROM 0";
	close_cmd = "CLOSE " + ALIAS_NAME;
}

CMusic::CMusic(string mediaName)
{
	isOpen = false;
	setMediaName(mediaName);

	open_cmd = "OPEN " + mediaName + " ALIAS " + ALIAS_NAME;
	status_cmd = "status " + ALIAS_NAME + " mode";
	play_cmd = "PLAY " + ALIAS_NAME + " FROM 0";
	close_cmd = "CLOSE " + ALIAS_NAME;
}

//发送信息给MCI  
bool CMusic::SendMciCmd(string cmd)
{
	//播放多媒体文件的API指令
	if (!mciSendString(cmd.c_str(), NULL, 0, 0))
	{
		return true;
	}
	return false;
}

//从MCI获取信息  
string CMusic::GetMciStatus(string cmd)
{
	char message[20];
	mciSendString(cmd.c_str(), message, 20, 0);
	string str(message);
	return str;
}

void CMusic::ClosePlayer()
{
	if (isOpen)
	{
		SendMciCmd(close_cmd);
		isOpen = false;
	}
}

void CMusic::OpenMediaFile()
{
	ClosePlayer();

	SendMciCmd(open_cmd);

	isOpen = true;

}

void CMusic::PlayMediaFile()
{
	if (isOpen)
	{
		SendMciCmd(play_cmd);
	}
}

void CMusic::Play()
{
	OpenMediaFile();
	PlayMediaFile();
}

void CMusic::Stop()
{
	ClosePlayer();
}

bool CMusic::isStopped()
{
	string result = "";
	result = GetMciStatus(status_cmd);  //获取音乐状态  
	if (result == "stopped")
	{
		return true;
	}
	return false;
}