add some code

managed_components/espressif__esp-sr/include/esp32c5/esp_speech_features.h

@@ -0,0 +1,62 @@
+#pragma once
+#include "c_speech_features_config.h"
+#include "stdlib.h"
+#include <assert.h>
+#include <stdbool.h>
+
+#ifndef M_2PI
+#define M_2PI 6.283185307179586476925286766559005
+#endif
+
+typedef struct {
+    float *coeff;
+    int *bank_pos;
+    int nfilter;
+} esp_mel_filter_t;
+
+float *esp_mfcc_malloc(size_t size, bool from_psram);
+
+void esp_mfcc_free(void *ptr);
+
+/**
+ * @brief Initialize FFT table
+ * @warning For ESP-PLATFORM, use esp-dsp fft
+ *          For Other platform, use kiss fft
+ *
+ * @param nfft  The input samples number
+ * @return fft-table
+ **/
+void *esp_fft_init(int nfft);
+
+/**
+ * @brief Free FFT table
+ * @warning For ESP-PLATFORM, use esp-dsp fft
+ *          For Other platform, use kiss fft
+ *
+ * @param fft_table  The fft table initialized by esp_fft_init
+ * @param nfft       The input samples number
+ * @return fft-table
+ **/
+void esp_fft_deinit(void *fft_table, int nfft);
+
+/**
+ * @brief Initial window function
+ *        Currently support hanning, hamming, sine, povey, rectangular,
+ *        wn9(512-hanning to get wakenet9& multinet5 compatible)
+ **/
+float *esp_win_func_init(char *win_type, float *window_data, int frame_length);
+
+float *esp_fftr(float *x, int nfft, void *fft_table);
+
+float *esp_spectrum_step(float *x, int nfft, bool use_power, void *fft_handle);
+
+void esp_audio_short_to_float(short *samples, float *x, int len, int remove_dc);
+
+float *esp_preemphasis_step(float *x, unsigned int len, float coeff, float last);
+
+esp_mel_filter_t *esp_mel_filter_init(
+    int nfft, int nfilter, int low_freq, int high_freq, int samp_freq, bool from_psram);
+
+void esp_mel_filter_deinit(esp_mel_filter_t *mel_filter);
+
+float *esp_mel_dotprod_step(float *x, float *out, esp_mel_filter_t *mel_filter, int use_log_fbank, float epsilon);