dsps_conv_f32_ansi.c File Reference

#include "dsps_conv.h"
#include "esp_log.h"

Include dependency graph for dsps_conv_f32_ansi.c:

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Functions
esp_err_t	dsps_conv_f32_ansi (const float *Signal, const int siglen, const float *Kernel, const int kernlen, float *convout)

Variables
static const char *	TAG = "dsps_conv"

Function Documentation

dsps_conv_f32_ansi()

esp_err_t dsps_conv_f32_ansi	(	const float *	Signal,
		const int	siglen,
		const float *	Kernel,
		const int	kernlen,
		float *	convout )

Definition at line 20 of file dsps_conv_f32_ansi.c.

{
    if (NULL == Signal) {
        return ESP_ERR_DSP_PARAM_OUTOFRANGE;
    }
    if (NULL == Kernel) {
        return ESP_ERR_DSP_PARAM_OUTOFRANGE;
    }
    if (NULL == convout) {
        return ESP_ERR_DSP_PARAM_OUTOFRANGE;
    }
 
    float *sig = (float *)Signal;
    float *kern = (float *)Kernel;
    int lsig = siglen;
    int lkern = kernlen;
 
    if (siglen < kernlen) {
        sig = (float *)Kernel;
        kern = (float *)Signal;
        lsig = kernlen;
        lkern = siglen;
    }
 
    for (int n = 0; n < lkern; n++) {
        size_t k;
 
        convout[n] = 0;
 
        for (k = 0; k <= n; k++) {
            convout[n] += sig[k] * kern[n - k];
        }
        ESP_LOGV(TAG, "L1 kmin = %i, kmax = %i , n-kmin = %i", 0, n, n);
    }
    for (int n = lkern; n < lsig; n++) {
        int kmin, kmax, k;
 
        convout[n] = 0;
 
        kmin = n - lkern + 1;
        kmax = n;
        ESP_LOGV(TAG, "L2 n=%i, kmin = %i, kmax = %i , n-kmin = %i", n, kmin, kmax, n - kmin);
        for (k = kmin; k <= kmax; k++) {
            convout[n] += sig[k] * kern[n - k];
        }
    }
 
    for (int n = lsig; n < lsig + lkern - 1; n++) {
        int kmin, kmax, k;
 
        convout[n] = 0;
 
        kmin = n - lkern + 1;
        kmax =  lsig - 1;
 
        for (k = kmin; k <= kmax; k++) {
            convout[n] += sig[k] * kern[n - k];
        }
        ESP_LOGV(TAG, "L3 n=%i, kmin = %i, kmax = %i , n-kmin = %i", n, kmin, kmax, n - kmin);
    }
    return ESP_OK;
}

References ESP_ERR_DSP_PARAM_OUTOFRANGE, ESP_OK, k, n, and TAG.

Variable Documentation

TAG

const char* TAG = "dsps_conv"

static

Definition at line 18 of file dsps_conv_f32_ansi.c.