From d9dfcc39ecac1c13cf2569367b172c8729791cb0 Mon Sep 17 00:00:00 2001
From: liuyihui <liuyihui02@gmail.com>
Date: Mon, 24 Apr 2023 23:37:57 +0800
Subject: [PATCH] remove: Rcos and hann

---
 src/sstv.c | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/src/sstv.c b/src/sstv.c
index 3808249..a6b4f49 100644
--- a/src/sstv.c
+++ b/src/sstv.c
@@ -1,28 +1,20 @@
+#include "derivative.h"
 #include "fft/fft.h"
 #include "fft/table.h"
 #include "math.h"
 #include "sstv.h"
 #include "stdio.h"
 
-static q15_t buffer[MN];
 static q15_t data[N];
+static q15_t buffer[MN];
 static q15_t* pData = &data[0];
-static q15_t img[1843202];
-static q15_t* pImg = &img[0];
 static uint8_t colorBuf[960];
 
 static const float32_t color_re = (float32_t)(FREQ_RANGE) / (COLOR_SCALE - 1);
 #define fre2lum(fre) (uint8_t)((fre - FREQ_BLACK) / color_re)
 
-// #define Rcos(x, N) (0.5 - 0.5 * cos(2.0 * PI * x / (N - 1.0)))
-
-// static q15_t hann(uint16_t x, uint16_t len) {
-//     q31_t v = round(Rcos(x, len) * 32768);
-//     if (v > 32767) v = 32767;
-//     if (v < -32768) v = -32768;
-//     return (q15_t)v;
-// }
-
+static q15_t img[1843202];
+static q15_t* pImg = &img[0];
 void init() {
     FILE* fp;
     fp = fopen("temp/data.txt", "r");
@@ -45,7 +37,6 @@ static uint16_t find_peak(uint16_t L, uint16_t R) {
 
 static void hanning(uint16_t len) {
     for (uint16_t i = len; i < N; i++) data[i] = 0;
-    // for (uint16_t i = 0; i < len; i++) data[i] = ((q31_t)data[i] * hann(i, len)) >> 15;
     if (len == 160)
         for (uint16_t i = 0; i < len; i++) data[i] = ((q31_t)data[i] * hanning_160[i]) >> 15;
     else