sp500/log_mel.h Source File

sp500/log_mel.h Source File#

Mobilint REGULUS: sp500/log_mel.h Source File
Mobilint REGULUS v4.1
SP500 DSP API
sp500
#ifndef SP500_LOG_MEL_H
#define SP500_LOG_MEL_H
 
#include <sp500/dsp.h>
 
#ifdef __cplusplus
extern "C" {
#endif
#define SP500_LOG_MEL_MAX_MELS 256
#define SP500_LOG_MEL_MAX_FFT 2048
typedef struct sp500_log_mel_params
{
    int32_t n_samples;        
    int32_t sample_rate;      
    int32_t n_fft;            
    int32_t hop_length;       
    int32_t n_mels;           
    float   min_frequency;    
    float   max_frequency;    
    uint8_t normalize;        
    uint8_t reserved0[3];     
    const float* mel_filters;
    uint32_t mel_filters_count;
 
    uint32_t reserved[5];     
} sp500_log_mel_params;
SP500_API void sp500_log_mel_params_init(sp500_log_mel_params* params);
SP500_API int32_t sp500_log_mel_num_frames(int32_t n_samples, int32_t hop_length);
SP500_API int32_t sp500_log_mel_num_freq(int32_t n_fft);
typedef struct sp500_log_mel_result
{
    int32_t  n_frames;      
    float    max_log;       
    double   host_seconds;  
    uint32_t reserved[4];   
} sp500_log_mel_result;
SP500_API sp500_status sp500_log_mel(const sp500_buffer* audio,
                                     const sp500_log_mel_params* params,
                                     sp500_buffer* features,
                                     sp500_log_mel_result* result);
SP500_API sp500_status sp500_log_mel_cpu(const float* audio,
                                         const sp500_log_mel_params* params,
                                         float* features, int32_t features_count,
                                         sp500_log_mel_result* result);
 
#ifdef __cplusplus
} /* extern "C" */
#endif
 
#endif /* SP500_LOG_MEL_H */