#include <mfcc_comp.h>
Data Fields | |
| struct mfcc_buffer | buf |
| Circular buffer for input data. | |
| struct mfcc_pre_emph | emph |
| Pre-emphasis filter. | |
| struct mfcc_fft | fft |
| FFT related. | |
| struct dct_plan_16 | dct |
| DCT related. | |
| struct psy_mel_filterbank | melfb |
| Mel filter bank. | |
| struct mfcc_cepstral_lifter | lifter |
| Cepstral lifter coefficients. | |
| struct mat_matrix_16b * | mel_spectra |
| Pointer to scratch. | |
| struct mat_matrix_16b * | cepstral_coef |
| Pointer to scratch. | |
| int32_t * | power_spectra |
| Pointer to scratch. | |
| int32_t * | mel_log_32 |
| Pointer to scratch for 32-bit Mel output Q9.23. | |
| int32_t | mmax |
| Maximum Mel value in Q9.23. | |
| int16_t | buf_avail |
| int16_t * | buffers |
| int16_t * | prev_data |
| prev_data_size | |
| int16_t * | window |
| fft_size | |
| int16_t * | triangles |
| int | source_channel |
| int | buffer_size |
| int | prev_data_size |
| int | low_freq |
| int | high_freq |
| int | sample_rate |
| bool | mel_only |
| When true, output Mel spectra instead of cepstral coefficients. | |
| bool | waiting_fill |
| booleans | |
| bool | prev_samples_valid |
| bool | header_pending |
| True when data header not yet written for current output. | |
| struct mfcc_data_header | header |
| Data header for current output frame. | |
| size_t | sample_buffers_size |
| bytes | |
| int32_t * | out_data_ptr |
| Read pointer into staging data for multi-period output. | |
| int | out_remain |
| Remaining int32_t samples to write to sink from staging. | |
| int32_t * | out_stage |
| Dedicated staging buffer for pending output, decoupled from STFT scratch. | |
| int | out_stage_size |
| Capacity of out_stage in int32_t samples. | |
| uint32_t | hop_count |
| FFT hop counter, increments every processed hop. | |
| int | vad_silence_count |
| Consecutive VAD=0 hops since last speech. | |
| int16_t | dtx_trailing_silence |
| Number of trailing silence hops to send, from config. | |
| int16_t | dtx_silence_interval |
| Send silence frame every Nth hop, 0 = disable. | |
| int | dtx_silence_counter |
| Counter for periodic silence frame send. | |
Field Documentation
◆ buf
| struct mfcc_buffer mfcc_state::buf |
Circular buffer for input data.
◆ buf_avail
| int16_t mfcc_state::buf_avail |
◆ buffer_size
| int mfcc_state::buffer_size |
◆ buffers
| int16_t* mfcc_state::buffers |
◆ cepstral_coef
| struct mat_matrix_16b* mfcc_state::cepstral_coef |
Pointer to scratch.
◆ dct
| struct dct_plan_16 mfcc_state::dct |
DCT related.
◆ dtx_silence_counter
| int mfcc_state::dtx_silence_counter |
Counter for periodic silence frame send.
◆ dtx_silence_interval
| int16_t mfcc_state::dtx_silence_interval |
Send silence frame every Nth hop, 0 = disable.
◆ dtx_trailing_silence
| int16_t mfcc_state::dtx_trailing_silence |
Number of trailing silence hops to send, from config.
◆ emph
| struct mfcc_pre_emph mfcc_state::emph |
Pre-emphasis filter.
◆ fft
| struct mfcc_fft mfcc_state::fft |
FFT related.
◆ header
| struct mfcc_data_header mfcc_state::header |
Data header for current output frame.
◆ header_pending
| bool mfcc_state::header_pending |
True when data header not yet written for current output.
◆ high_freq
| int mfcc_state::high_freq |
◆ hop_count
| uint32_t mfcc_state::hop_count |
FFT hop counter, increments every processed hop.
◆ lifter
| struct mfcc_cepstral_lifter mfcc_state::lifter |
Cepstral lifter coefficients.
◆ low_freq
| int mfcc_state::low_freq |
◆ mel_log_32
| int32_t* mfcc_state::mel_log_32 |
Pointer to scratch for 32-bit Mel output Q9.23.
◆ mel_only
| bool mfcc_state::mel_only |
When true, output Mel spectra instead of cepstral coefficients.
◆ mel_spectra
| struct mat_matrix_16b* mfcc_state::mel_spectra |
Pointer to scratch.
◆ melfb
| struct psy_mel_filterbank mfcc_state::melfb |
Mel filter bank.
◆ mmax
| int32_t mfcc_state::mmax |
Maximum Mel value in Q9.23.
◆ out_data_ptr
| int32_t* mfcc_state::out_data_ptr |
Read pointer into staging data for multi-period output.
◆ out_remain
| int mfcc_state::out_remain |
Remaining int32_t samples to write to sink from staging.
◆ out_stage
| int32_t* mfcc_state::out_stage |
Dedicated staging buffer for pending output, decoupled from STFT scratch.
◆ out_stage_size
| int mfcc_state::out_stage_size |
Capacity of out_stage in int32_t samples.
◆ power_spectra
| int32_t* mfcc_state::power_spectra |
Pointer to scratch.
◆ prev_data
| int16_t* mfcc_state::prev_data |
prev_data_size
◆ prev_data_size
| int mfcc_state::prev_data_size |
◆ prev_samples_valid
| bool mfcc_state::prev_samples_valid |
◆ sample_buffers_size
| size_t mfcc_state::sample_buffers_size |
bytes
◆ sample_rate
| int mfcc_state::sample_rate |
◆ source_channel
| int mfcc_state::source_channel |
◆ triangles
| int16_t* mfcc_state::triangles |
◆ vad_silence_count
| int mfcc_state::vad_silence_count |
Consecutive VAD=0 hops since last speech.
◆ waiting_fill
| bool mfcc_state::waiting_fill |
booleans
◆ window
| int16_t* mfcc_state::window |
fft_size
The documentation for this struct was generated from the following file:
- /home/lrg/work/sof-dox-work/src/include/sof/audio/mfcc/mfcc_comp.h
