#include?
#include?

#pragma?comment（lib?“winmm.lib“）

#define?DATASIZE?1024*512?//分次截取數據大小
FILE*			pcmfile;??//音頻文件
HWAVEOUT????????hwo;

void?CALLBACK?WaveCallback（HWAVEOUT?hWave?UINT?uMsg?DWORD?dwInstance?DWORD?dw1?DWORD?dw2）//回調函數
{
	switch?（uMsg）
	{
		case?WOM_DONE://上次緩存播放完成觸發該事件
		{
			LPWAVEHDR?pWaveHeader?=?（LPWAVEHDR）dw1;
			pWaveHeader->dwBufferLength?=?fread（pWaveHeader->lpData?1?DATASIZE?pcmfile）;;
			waveOutPrepareHeader（hwo?pWaveHeader?sizeof（WAVEHDR））;
			waveOutWrite（hwo?pWaveHeader?sizeof（WAVEHDR））;
			break;
		}
	}
}

void?main（）?
{
	int?????????????cnt;
	WAVEHDR?????????wh1;
	WAVEHDR?????????wh2;
	WAVEFORMATEX????wfx;

	fopen_s（&pcmfile?“paomo.pcm“?“rb“）;//打開文件

	wfx.wFormatTag?=?WAVE_FORMAT_PCM;//設置波形聲音的格式
	wfx.nChannels?=?1;//設置音頻文件的通道數量
	wfx.nSamplesPerSec?=?8000;//設置每個聲道播放和記錄時的樣本頻率
	wfx.nAvgBytesPerSec?=?16000;//設置請求的平均數據傳輸率單位byte/s。這個值對于創建緩沖大小是很有用的
	wfx.nBlockAlign?=?2;//以字節為單位設置塊對齊
	wfx.wBitsPerSample?=?16;
	wfx.cbSize?=?0;//額外信息的大小

	waveOutOpen（&hwo?WAVE_MAPPER?&wfx?（DWORD）WaveCallback?0L?CALLBACK_FUNCTION）;//打開一個給定的波形音頻輸出裝置來進行聲音播放，方式為回調函數方式。如果是對話框程序，可以將第五個參數改為（DWORD）this，操作跟本Demo程序相似

	wh1.dwLoops?=?0L;//播放區一
	wh1.lpData?=?new?char[DATASIZE];
	wh1.dwBufferLength?=?DATASIZE;?
	fread（wh1.lpData?1?DATASIZE?pcmfile）;
	wh1.dwFlags?=?0L;
	waveOutPrepareHeader（hwo?&wh1?sizeof（WAVEHDR））;//準備一個波形數據塊用于播放
	waveOutWrite（hwo?&wh1?sizeof（WAVEHDR））;//在音頻媒體中播放第二個參數指定的數據，也相當于開啟一個播放區的意思

	wh2.dwLoops?=?0L;//播放區二，基本同上
	wh2.lpData?=?new?char[DATASIZE];
	wh2.dwBufferLength?=?DATASIZE;
	fread（wh2.lpData?1?DATASIZE?pcmfile）;
	wh2.dwFlags?=?0L;
	waveOutPrepareHeader（hwo?&wh2?sizeof（WAVEHDR））;
	waveOutWrite（hwo?&wh2?sizeof（WAVEHDR））;

	while?（wh1.dwBufferLength?!=?0?||?wh2.dwBufferLength?!=?0）//如果文件還在沒播放完則等待500ms
	{
		Sleep（500）;
	}
	waveOutUnprepareHeader（hwo?&wh1?sizeof（WAVEHDR））;//清理數據
	waveOutUnprepareHeader（hwo?&wh2?sizeof（WAVEHDR））;

	delete?[]wh1.lpData;
	delete?[]wh2.lpData;
	fclose（pcmfile）;//關閉文件
	return;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2015-03-22?02:20??PcmDoubleBufferPlayer\
?????目錄???????????0??2015-03-22?02:20??PcmDoubleBufferPlayer\Debug\
?????目錄???????????0??2015-03-22?02:20??PcmDoubleBufferPlayer\PcmDoubleBufferPlayer\
?????文件????????1009??2015-03-21?18:20??PcmDoubleBufferPlayer\PcmDoubleBufferPlayer.sln
?????文件???????18944??2015-03-22?02:20??PcmDoubleBufferPlayer\PcmDoubleBufferPlayer.v12.suo
?????目錄???????????0??2015-03-22?02:20??PcmDoubleBufferPlayer\PcmDoubleBufferPlayer\Debug\
?????文件?????4144064??2014-06-09?21:51??PcmDoubleBufferPlayer\PcmDoubleBufferPlayer\paomo.pcm
?????文件????????2343??2015-03-22?02:20??PcmDoubleBufferPlayer\PcmDoubleBufferPlayer\PcmDoubleBufferPlayer.cpp
?????文件????????4115??2015-03-21?18:22??PcmDoubleBufferPlayer\PcmDoubleBufferPlayer\PcmDoubleBufferPlayer.vcxproj
?????文件?????????962??2015-03-21?18:22??PcmDoubleBufferPlayer\PcmDoubleBufferPlayer\PcmDoubleBufferPlayer.vcxproj.filters