Use Openal to play audio in Linux

Header file

/** Soundplay. H * 1: You need to download and develop the openal Development Kit (software implementation of the openal API (Devlopment files) and ALUT Development Kit * 2: add the header file path:/usr/include/Al * 3: add libraries: openal and ALUT */# ifndef soundplay_h _ # define soundplay_h _ # include <Al. h> # include <Alb. h> # include <ALUT. h> # include <iostream> # include <stdlib. h> # include <stdio. h> # define numbuffer 4 // four sounds can be played simultaneously # define numsource 4 // four sounds can be played simultaneously using namespace STD; Class soundplay { Public: soundplay (); Virtual ~ Soundplay (); void playsound (string filename, int index, float volume); // when Index = 0: loop playback; index! = 0: play once void setvolume (INT index, float volume); void releasesound (INT index); void musicpause (INT index); void musiccontinue (INT index ); bool checkplaystate (int I); Private: void playlongsound (const char * filename, int index); void opendevice (); void closedevice (); string getalcerrorstring (alenum ERR); Private: aluint buffers [numbuffer]; aluint sources [numsource]; alccontext * cc; alcdevice * dev; bool checkstate; alenum result ;}; # endif/* soundplay_h _*/

Cpp File

/** Soundplay. cpp */# include "soundplay. H" soundplay: soundplay () {alutinit (null, 0); If (result = algeterror ())! = Al_no_error) cout <"alutinit --" <result <Endl; opendevice (); // playsound ("Media/music/bgsound1.wav", 0,100);} soundplay :: ~ Soundplay () {closedevice ();} void soundplay: opendevice () {alcchar devicename [] = "ALSA software"; // ALSA software, directsound3ddev = alcopendevice (devicename ); cc = alccreatecontext (Dev, null); alcmakecontextcurrent (CC);} void soundplay: closedevice () {alccontext * context = alcgetcurrentcontext (); alcdevice * Device = alcgetcontextsdevice (context ); alcmakecontextcurrent (null); alcdestroycontext (context); ALB Closedevice (device);} void soundplay: releasesound (INT index) {aldeletesources (1, & sources [Index]); aldeletebuffers (1, & buffers [Index]);} void soundplay: playlongsound (const char * filename, int index) {algensources (1, & sources [Index]); algenbuffers (1, & buffers [Index]); alvoid * data; alsizei size = 0, freq = 0; alenum format; alboolean loop; alutloadwavfile (albyte *) filename, & format, & Data, & size, & freq, & Loop); albuffe RDATA (buffers [Index], format, Data, size, freq); If (result = algeterror ())! = Al_no_error) cout <"playlongsound albufferdata errno" <result <Endl; alutunloadwav (format, Data, size, freq); alsourcei (sources [Index], al_buffer, buffers [Index]); // use the audio source to associate the buffer if (Index = 0) alsourcei (sources [Index], al_looping, al_true); alsourceplay (sources [Index]);} void soundplay: playsound (string filename, int index, float volume) {algensources (1, & sources [Index]); algenbuffers (1, & buffers [Index]); releasesound (INDE X); playlongsound (filename. data (), index); alsourcef (sources [Index], al_gain, volume);} void soundplay: setvolume (INT index, float volume) // volume value range (0 ~ 1) {alsourcef (sources [Index], al_gain, volume);} void soundplay: musicpause (INT index) {alsourcepause (sources [Index]); alsourcestop (sources [Index]);} void soundplay: musiccontinue (INT index) {alsourceplay (sources [Index]);} bool soundplay: checkplaystate (int I) {alint state; algetsourcei (sources [I], al_source_state, & State); If (State! = Al_playing) {checkstate = false; return true;} return false;} int main () {soundplay sp; SP. playsound ("Media/music/bgsound1.wav", 0,100); While (1) {} return 0 ;}