alcCaptureSamples crashes on stereo capturing

Hello,

I have got this code for capturing mono 8 bit data, the code works 
without any error:

m_device = alcCaptureOpenDevice( p_device.c_str(),  
static_cast<ALCuint>(p_sampingfrequency),  AL_FORMAT_MONO8,     
static_cast<ALCsizei>(p_buffersize));

ublas::vector<ALubyte> l_buffer(m_buffersize);
alcCaptureStart(m_device);
while(m_capturing)
{
        alcGetIntegerv(...)
        l_samplesread = std::min( 
static_cast<std::size_t>(l_samplesread), l_buffer.size()-i);
        alcCaptureSamples(m_device, (ALCvoid*)(&l_buffer[i]), l_samplesread);
}

If I switch the the AL_FORMAT_MONO8 to AL_FORMAT_STEREO8 and change the 
p_buffersize to 2*p_buffersize & m_buffersize to 2*m_buffersize the 
code crashes
on the alcCaptureSamples line and the buffer is not filled. IMHO the 
left channel should be the even elements in the l_buffer and the right 
the odd ones, so if I create
a double size buffer each l_buffer block should be started with the 
left channel data. If I disable the alcCaptureSample call, the correct 
number of samples are received.

Can anybody help me please to create the correct stereo working option?

Thx

Phil


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