OpenAL学习笔记(一)---播放音频（*.wav）

1.简介

OpenAL和OpenGL编码风格很像，跟OpenGL中我们常用的glut类似，OpenAL中也用alut.

2.实现

实现中参考了samples里的loadfile.c；

源码：

TEAudio.h

//! Created 2013/04/22;//! c++;#include <stdlib.h>#include <stdio.h>#include <string>#include <iostream>//! OpenAl;#include "al/alut.h"using namespace std;namespace TE{class TEAudio{private:static TEAudio* m_pAudio;public:TEAudio(void);~TEAudio(void);//! Singleton. Return the single instance;static TEAudio* sharedAudio(void);//! Load file and play the media(only *.wav...now)void loadFile(const char* strFilePath);};}

TEAudio.cpp (main.cpp)

#include "TEAudio.h"using namespace TE;TEAudio* TEAudio::m_pAudio = NULL;TE::TEAudio::TEAudio( void ){int argc = 1;char* argv = "TEApp";if (!alutInit (&argc, &argv)){ALenum error = alutGetError ();fprintf (stderr, "%s\n", alutGetErrorString (error));exit (EXIT_FAILURE);}}TE::TEAudio::~TEAudio( void ){}TEAudio* TE::TEAudio::sharedAudio( void ){if (NULL == m_pAudio){m_pAudio = new TEAudio();}return m_pAudio;}void TE::TEAudio::loadFile( const char* strFilePath ){ALuint buffer;ALuint source;ALenum error;ALint status;/* Create an AL buffer from the given sound file. */buffer = alutCreateBufferFromFile (strFilePath);if (buffer == AL_NONE){error = alutGetError ();fprintf (stderr, "Error loading file: '%s'\n",alutGetErrorString (error));alutExit ();exit (EXIT_FAILURE);}/* Generate a single source, attach the buffer to it and start playing. */alGenSources (1, &source);alSourcei (source, AL_BUFFER, buffer);alSourcePlay (source);/* Normally nothing should go wrong above, but one never knows... */error = alGetError ();if (error != ALUT_ERROR_NO_ERROR){fprintf (stderr, "%s\n", alGetString (error));alutExit ();exit (EXIT_FAILURE);}/* Check every 0.3 seconds if the sound is still playing. */do{alutSleep (0.3f);alGetSourcei (source, AL_SOURCE_STATE, &status);std::cout << ".";}while (status == AL_PLAYING);}int main(int argc, char** argv){//F:\\backup\\c++\\TEGameTest\\Debug\\;TEAudio::sharedAudio()->loadFile("lovesong.wav");return 0;}

3.待续....

①加入播放控制（播放、暂停、恢复、动态加载资源）；

②与GL mainloop结合（防止图像和音频单独进入死循环）；

4.下载链接

相关库和源码下载