speex_resampler_process_interleaved_float returns NaN

Hello all

I using 1.2beta3 on Windows and implementing resampler. Audio signals
are being retrieved by Windows Core Audio API (e.g.
*IAudioCaptureClient::GetBuffer*
<http://msdn.microsoft.com/en-us/library/windows/desktop/dd370859%28v=vs.85%29.aspx>)
that are interleaved 32-bit floating point signals (-1.0 - 1.0).
Then, speex_resampler_process_interleaved_float returns NaN in the
output buffer.
Why does this occur ?

I refered below sample. Can you all give me some correct samples to
treat interleaved floating point signals on libspeexdsp ?
http://svn.xiph.org/trunk/speex/libspeex/testresample.c

Truly Yours.

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