How to get a sound to stop playing in OpenAL - c++

Question

I am trying to have a play sound method execute on a click event, followed by a stop method being called on the release, using OpenAL in in C++. My problem is that I cannot get it to stop playing on the release. My source code to play the sound is as follows:
bool SoundManager::play(QString fileName, float pitch, float gain)
{
static uint sourceIndex = 0;
ALint state;
// Get the corresponding buffer id set up in the init function.
ALuint bufferID = mSoundBuffers[fileName];
if (bufferID != 0) {
// Increment which source we are using, so that we play in a "free" source.
sourceIndex = (sourceIndex + 1) % SOUNDMANAGER_MAX_NBR_OF_SOURCES;
// Get the source in which the sound will be played.
ALuint source = mSoundSources[sourceIndex];
if (alIsSource (source) == AL_TRUE) {
// Attach the buffer to an available source.
alSourcei(source, AL_BUFFER, bufferID);
if (alGetError() != AL_NO_ERROR) {
reportOpenALError();
return false;
}
// Set the source pitch value.
alSourcef(source, AL_PITCH, pitch);
if (alGetError() != AL_NO_ERROR) {
reportOpenALError();
return false;
}
// Set the source gain value.
alSourcef(source, AL_GAIN, gain);
if (alGetError() != AL_NO_ERROR) {
reportOpenALError();
return false;
}
alGetSourcei(source, AL_SOURCE_STATE, &state);
if (state!=AL_PLAYING)
alSourcePlay(source);
else if(state==AL_PLAYING)
alSourceStop(source);
if (alGetError() != AL_NO_ERROR) {
reportOpenALError();
return false;
}
}
} else {
// The buffer was not found.
return false;
}`
I think that the issue is that when it is called the second time, when it should be stopped, it is a different source, and that is why its state is not playing. If this is the issue, then how can I access the same source?

Answer 1

Of course it's not the same source as before, you increase the sourceIndex variable each call.
So the first call, to play, sourceIndex will be 1 (sourceIndex + 1). The next time you call the function (which btw. is badly named for something that toggles playing) then sourceIndex again will be increased by one, which will give you a new index into the source vector.