Re: Get current volume for a source

> The Big Uno wrote:
>> Hello all,
>>
>> I am trying to implement a VU Meter style widget by pulling the
>> currently playing volume of a given source.  Note that this is not
>> the gain of the source; I want the number to be either the raw value
>> of the sound frame at the time I call the function, or the raw value
>> * current gain set for the source.  Does anyone have an idea on what
>> function I could call for this?
>>
>> I would like to get this value for just a certain source, not the
>> entire OpenAL environment.  The VU meters I am making are going to be
>> on a per-channel level, with each source logically mapped to a
>> certain channel.  Think of the giant mixing boards with a VU meter
>> for each input source for an idea of what I am trying to do here.
>>  
>
> The only way to do this is to retain your own copy of each source's
> buffer data after you pass it to OpenAL, and then get the current
> position of each source as you update your meter.  You can either call
> alGetIntegerv with AL_SAMPLE_OFFSET or AL_BYTE_OFFSET, or you can call
> alGetFloatv or alGetDoublev with AL_SEC_OFFSET, whichever you prefer.
>
>
>> (On a side note, I am actually using JOAL - Java wrappers for the
>> OpenAL functions - which I believe is currently using the OpenAL 1.0
>> specification.  The JOAL methods map quite closely to the underlying
>> OpenAL API, which is why I am asking here and not on the JOAL
>> forums.  If you can get me the OpenAL function, that would be good
>> enough for me.)
>>  
>
> Oh, then you're out of luck.  The AL_*_OFFSET queries are 1.1
> features.  As far as I know, there isn't any reliable way to do what
> you want in OpenAL 1.0.
>
> --"J"
>