File syn_mfcc.c

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Zero-Heap Fixed-Point Mel-Frequency Cepstral Coefficients (MFCC) Implementation.

• #include "syn_mfcc.h"
• #include <string.h>

Public Functions

Type	Name
SYN_Status	syn_mfcc_init (SYN_MFCC * mfcc, uint16_t sample_rate_hz, uint16_t fft_size) Initialize MFCC Extractor Context.
SYN_Status	syn_mfcc_process_frame (SYN_MFCC * mfcc, const int16_t * pcm_in, q7_t mfcc_out) Process one window of 16-bit PCM audio samples and compute 13 Q7 MFCC coefficients.

Public Functions Documentation

function syn_mfcc_init

Initialize MFCC Extractor Context.

SYN_Status syn_mfcc_init (
    SYN_MFCC * mfcc,
    uint16_t sample_rate_hz,
    uint16_t fft_size
) 

Parameters:

• mfcc Pointer to MFCC context.
• sample_rate_hz Audio sample rate in Hz.
• fft_size FFT window size (must be 64 or 128).

Returns:

SYN_OK on success, SYN_INVALID_PARAM if invalid.

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function syn_mfcc_process_frame

Process one window of 16-bit PCM audio samples and compute 13 Q7 MFCC coefficients.

SYN_Status syn_mfcc_process_frame (
    SYN_MFCC * mfcc,
    const int16_t * pcm_in,
    q7_t mfcc_out
) 

Parameters:

• mfcc Pointer to MFCC context.
• pcm_in Array of 16-bit PCM input samples (length = fft_size).
• mfcc_out Output buffer for 13 Q7 MFCC coefficients.

Returns:

SYN_OK on success, SYN_INVALID_PARAM if NULL.

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The documentation for this class was generated from the following file src/syntropic/dsp/syn_mfcc.c