extracting wav samples from a buffer

[jeffmo77]

I'm fairly new to OpenAL.  I'm streaming some basic *.wav audio data using 4 buffers at a time of size 1024 each.  I'd like to apply some convolution EQ filtering on the audio, but the code I'm trying to use processes the data on a per audio sample basis.  

Can somebody help me figure out how to sequentially read out each individual sample and process it before stuffing it back into the buffer?  All this should happen just prior to the queue for playback.

should I be using fread()?

Thanks

[Daniel PEACOCK]

Hi,

You will need some code to parse a wavefile (i.e read the header to
determine the format of the sample data, and then the location of the
actual samples).   Once you know that information, you can indeed just use
something like fread() to pull in chunks of audio data.

If you have the OpenAL for Windows SDK (
http://connect.creativelabs.com/openal/Downloads/Forms/AllItems.aspx )
there is an example project called PlayStream that does everything you need
- except for putting the audio data through the convolution EQ effect -
which you can do just after reading the chunk of audio data from disk, and
before putting it in an OpenAL Buffer.

Dan
Creative Labs (UK) Ltd.

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                                       [Openal-devel] extracting wav      
             11/27/2008 05:24          samples from a buffer              
             PM                                                            
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           





I'm fairly new to OpenAL.  I'm streaming some basic *.wav audio data using
4
buffers at a time of size 1024 each.  I'd like to apply some convolution EQ
filtering on the audio, but the code I'm trying to use processes the data
on
a per audio sample basis.

Can somebody help me figure out how to sequentially read out each
individual
sample and process it before stuffing it back into the buffer?  All this
should happen just prior to the queue for playback.

should I be using fread()?

Thanks
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