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Start sound with offset

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Start sound with offset
« on: November 29, 2010, 16:48:36 »
Hello everyone,

I'm using OpenAL to read wav files, however, I sometimes need to start playing other than from beginning.
Let's say, I've a 3minute wav, and I want to play it from 1min35sec the end.
How can I do that using OpenAL ? I've found alSourcePlay/Stop, but now way to control where to start.

Thanks,
Estraven.

Re: Start sound with offset
« Reply #1 on: December 08, 2010, 06:22:09 »
You'll need to use either AL11.AL_BYTE_OFFSET, AL11.AL_SAMPLE_OFFSET, or AL11.AL_SEC_OFFSET.
You'll probably want to use AL11.AL_SEC_OFFSET, but beware that it rounds the seconds as best it can to the bytes, so bytes and samples will be more accurate.

//Code:
IntBuffer secondsOffset = BufferUtils.createIntBuffer(1).put(5); //Play at 5 seconds in
secondsOffset.rewind();
AL11.alSource(source,AL11.AL_SEC_OFFSET,secondsOffset);
AL10.alSourcePlay(source);


It's kind of dumb that they didn't add this until version 1.1; I'm not sure if this was on purpose or on accident, unless there is another way to do this in version 1.0.  This code works for me though in LWJGL.  8)
cool story, bro