Hi all,
I'm trying to play a simple sound for a game that I'm currently working on. I don't want to use SDL if I can help it and came across OpenAL. I found an example and tutorial for creating and playing sound without the alut header but I'm still having issues. The log output is fine, it's reading the file, knows the size and so on but nothing is played. I thought that maybe it was my game loop that was affecting it so created a new project with just the sound code to test and same result. any help is hugely appreciated. Thanks.
#include <cstdlib>
#include <iostream>
#include <OPENAL/al.h>
#include <OPENAL/alc.h>
using namespace std;
typedef uint32_t DWORD;
int endWithError(char* msg, int error=0)
{
//Display error message in console
cout << msg << "\n";
system("PAUSE");
return error;
}
int main(int argc, char *argv[])
{
//Loading of the WAVE file
FILE *fp = NULL; //Create FILE pointer for the WAVE file
fp=fopen("Sounds/mushroom_jump.wav","rb"); //Open the WAVE file
if (!fp) return endWithError("Failed to open file"); //Could not open file
//Variables to store info about the WAVE file (all of them is not needed for OpenAL)
char type[4];
DWORD size,chunkSize;
short formatType,channels;
DWORD sampleRate,avgBytesPerSec;
short bytesPerSample,bitsPerSample;
DWORD dataSize;
//Check that the WAVE file is OK
fread(type,sizeof(char),4,fp); //Reads the first bytes in the file
if(type[0]!='R' || type[1]!='I' || type[2]!='F' || type[3]!='F') //Should be "RIFF"
return endWithError ("No RIFF"); //Not RIFF
fread(&size, sizeof(DWORD),1,fp); //Continue to read the file
fread(type, sizeof(char),4,fp); //Continue to read the file
if (type[0]!='W' || type[1]!='A' || type[2]!='V' || type[3]!='E') //This part should be "WAVE"
return endWithError("not WAVE"); //Not WAVE
fread(type,sizeof(char),4,fp); //Continue to read the file
if (type[0]!='f' || type[1]!='m' || type[2]!='t' || type[3]!=' ') //This part should be "fmt "
return endWithError("not fmt "); //Not fmt
//Now we know that the file is a acceptable WAVE file
//Info about the WAVE data is now read and stored
fread(&chunkSize,sizeof(DWORD),1,fp);
fread(&formatType,sizeof(short),1,fp);
fread(&channels,sizeof(short),1,fp);
fread(&sampleRate,sizeof(DWORD),1,fp);
fread(&avgBytesPerSec,sizeof(DWORD),1,fp);
fread(&bytesPerSample,sizeof(short),1,fp);
fread(&bitsPerSample,sizeof(short),1,fp);
fread(type,sizeof(char),4,fp);
if (type[0]!='d' || type[1]!='a' || type[2]!='t' || type[3]!='a') //This part should be "data"
return endWithError("Missing DATA"); //not data
fread(&dataSize,sizeof(DWORD),1,fp); //The size of the sound data is read
//Display the info about the WAVE file
cout << "Chunk Size: " << chunkSize << "\n";
cout << "Format Type: " << formatType << "\n";
cout << "Channels: " << channels << "\n";
cout << "Sample Rate: " << sampleRate << "\n";
cout << "Average Bytes Per Second: " << avgBytesPerSec << "\n";
cout << "Bytes Per Sample: " << bytesPerSample << "\n";
cout << "Bits Per Sample: " << bitsPerSample << "\n";
cout << "Data Size: " << dataSize << "\n";
unsigned char* buf= new unsigned char[dataSize]; //Allocate memory for the sound data
//cout << fread(buf,sizeof(BYTE),dataSize,fp) << " bytes loaded\n"; //Read the sound data and display the
//number of bytes loaded.
//Should be the same as the Data Size if OK
//Now OpenAL needs to be initialized
ALCdevice *device; //Create an OpenAL Device
ALCcontext *context; //And an OpenAL Context
device = alcOpenDevice(NULL); //Open the device
if(!device) return endWithError("no sound device"); //Error during device oening
context = alcCreateContext(device, NULL); //Give the device a context
alcMakeContextCurrent(context); //Make the context the current
if(!context) return endWithError("no sound context"); //Error during context handeling
ALuint source; //Is the name of source (where the sound come from)
ALuint buffer; //Stores the sound data
ALuint frequency=sampleRate;; //The Sample Rate of the WAVE file
ALenum format=0; //The audio format (bits per sample, number of channels)
alGenBuffers(1, &buffer); //Generate one OpenAL Buffer and link to "buffer"
alGenSources(1, &source); //Generate one OpenAL Source and link to "source"
if(alGetError() != AL_NO_ERROR) return endWithError("Error GenSource"); //Error during buffer/source generation
//Figure out the format of the WAVE file
if(bitsPerSample == 8)
{
if(channels == 1)
format = AL_FORMAT_MONO8;
else if(channels == 2)
format = AL_FORMAT_STEREO8;
}
else if(bitsPerSample == 16)
{
if(channels == 1)
format = AL_FORMAT_MONO16;
else if(channels == 2)
format = AL_FORMAT_STEREO16;
}
if(!format) return endWithError("Wrong BitPerSample"); //Not valid forma
alBufferData(buffer, format, buf, dataSize, frequency); //Store the sound data in the OpenAL Buffer
if(alGetError() != AL_NO_ERROR)
return endWithError("Error loading ALBuffer"); //Error during buffer loading
//Sound setting variables
ALfloat SourcePos[] = { 0.0, 0.0, 0.0 }; //Position of the source sound
ALfloat SourceVel[] = { 0.0, 0.0, 0.0 }; //Velocity of the source sound
ALfloat ListenerPos[] = { 0.0, 0.0, 0.0 }; //Position of the listener
ALfloat ListenerVel[] = { 0.0, 0.0, 0.0 }; //Velocity of the listener
ALfloat ListenerOri[] = { 0.0, 0.0, -1.0, 0.0, 1.0, 0.0 }; //Orientation of the listener //First direction vector, then vector pointing up) //Listener
alListenerfv(AL_POSITION, ListenerPos); //Set position of the listener
alListenerfv(AL_VELOCITY, ListenerVel); //Set velocity of the listener
alListenerfv(AL_ORIENTATION, ListenerOri); //Set orientation of the listener
//Source
alSourcei (source, AL_BUFFER, buffer); //Link the buffer to the source
alSourcef (source, AL_PITCH, 1.0f ); //Set the pitch of the source
alSourcef (source, AL_GAIN, 1.0f ); //Set the gain of the source
alSourcefv(source, AL_POSITION, SourcePos); //Set the position of the source
alSourcefv(source, AL_VELOCITY, SourceVel); //Set the velocity of the source
alSourcei (source, AL_LOOPING, AL_FALSE ); //Set if source is looping sound
//PLAY
alSourcePlay(source); //Play the sound buffer linked to the source
if(alGetError() != AL_NO_ERROR) return endWithError("Error playing sound"); //Error when playing sound
// system("PAUSE");
std::cout << "Press any key to continue ..."; getchar();//Pause to let the sound play
std::cout<<"memememe"<<std::endl;
//Clean-up
fclose(fp); //Close the WAVE file
delete[] buf; //Delete the sound data buffer
alDeleteSources(1, &source); //Delete the OpenAL Source
alDeleteBuffers(1, &buffer); //Delete the OpenAL Buffer
alcMakeContextCurrent(NULL); //Make no context current
alcDestroyContext(context); //Destroy the OpenAL Context
alcCloseDevice(device); //Close the OpenAL Device
return EXIT_SUCCESS;
}
