Re: blocking / non-blocking capturing

On 2012-07-29 00:56:21 +0200, Chris Robinson said:

> On 07/28/2012 01:41 PM, Philipp Kraus wrote:
>> If I show my l_buffer values, it generates always the same data, so it
>> seems, I have created an error dyring the alcCaptureSamples
>> or the interface results wrong data. I have initializate my interface
>> with the sampling frequency 44.1k and mono 8 bit. The interface is named
>> on OSX with "CoreAudio Default".
> 
> If you're capturing 8-bit, then you need to store it using ALubyte 
> instead of ALshort.
> 
> If the data it captures is always silence (values are all near 128), 
> then check to make sure other OSX apps can properly capture audio. Make 
> sure also that you've called alcCaptureStart(l_capturedevice), and that 
> no errors are being generated (check alcGetError(l_capturedevice)).

Sorry, I have not enough time to test it, but I will try it in the next days.
So imho I have create a C++ class and do this code for creating a 
capture audio device:

in the ctor I create the device

m_device is a pointer to ALCdevice and p_device the capture device name.

m_device( alcOpenDevice( p_device.c_str() ) )

in my capture methode I call this
ALCdevice* l_capturedevice = alcCaptureOpenDevice( 
alcGetString(m_device, ALC_CAPTURE_DEVICE_SPECIFIER),     
(ALCuint)p_samplefrequency,     AL_FORMAT_MONO8,        
(ALCsizei)p_buffersize)
alcCaptureStart(l_capturedevice);
// here I will read the samples with a blocking structure

Is this correct? 

Thanks

Phil

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