[Openal] Get Audio time or buffer position

[Casey Borders]

That's perfect!!  Thanks!!

On Nov 24, 2007 7:20 PM, Chris Robinson <chris.kcat at gmail.com> wrote:

> On Saturday 24 November 2007 03:46:43 pm Casey Borders wrote:
> > I want to be able to "save" the current position in an audio stream so I
> > can come back and start that source right where it left off.  I want to
> be
> > able to do this because I am working on some code to manage hardware
> > sources and I'll need to steal sources and shift them around from time
> to
> > time, so when I start a sound back up I'll need to know where to start
> it
> > up at.  Does anyone have any suggestions?
>
> You can use the AL_SAMPLE_OFFSET (or AL_BYTE_OFFSET or AL_SEC_OFFSET(*))
> source attribute. eg:
>
> ALint stop_source(ALint source)
> {
>    ALint pos;
>    // Pause the source to prevent the offset from incrementing between
>    // getting it and stopping the source (alSourceStop rewinds the source
>    // back to 0)
>    alSourcePause(source);
>    alGetSourcei(source, AL_SAMPLE_OFFSET,  &pos);
>    alSourceStop(source);
>
>    return pos;
> }
>
> void restore_source(ALint source, ALint pos)
> {
>    alSourcei(source, AL_SAMPLE_OFFSET, pos);
>    alSourcePlay(source);
> }
>
> (*) Using AL_BYTE_OFFSET may behave a little quirky with compressed
> formats,
> but should be fine otherwise. AL_SEC_OFFSET uses a float (ALfloat,
> alGetSourcef, alSourcef).
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