Data Structures

Here are the data structures with brief descriptions:

Cbiquad	State and coefficients for a single biquad filter section
CFIO_HTKheader	HTK file header structure (12 bytes total)
CLA_simpleData	Simple audio buffer with read/write positions
CMD_DTMFTone	A single detected DTMF tone with timing information
CMD_vad_params	Parameters for the VAD detector
CMD_vad_state	Internal state for the VAD detector