Get all currently playing sounds (or get number of playing sounds for buffer)

I need to erase not playing buffer. For this I must check that there are no currently playing sounds attached to the buffer.

I took a look at alGetSourcei (source, AL_SOURCE_STATE, &state) and alGetSourcei (source, AL_BUFFER, &buffer), but I need also list of all "alive" sources. Is it possible? Or is there alternat开发者_开发百科ive solution?

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It is your responsibility to manage the buffers and know which are in-use and which are not, I believe.