From 76b7852f88b70bfb419bb1c6e9bef457c10e23a4 Mon Sep 17 00:00:00 2001
From: ZoRo <dos21h@gmail.com>
Date: Wed, 28 Jul 2021 08:02:21 +0100
Subject: Preparing usable webgui

---
 WasmAudio/main.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 65 insertions(+), 13 deletions(-)

(limited to 'WasmAudio')

diff --git a/WasmAudio/main.c b/WasmAudio/main.c
index 4987fff..ab17933 100644
--- a/WasmAudio/main.c
+++ b/WasmAudio/main.c
@@ -84,7 +84,8 @@ uint8_t *audio_rec_buffer=NULL;
 FILE *f_1,*f_2;
 fir_t fir_lp;
 firw_t firw_lp;
-const int N=200;
+//const int N=200;
+#define N (200)
 double h[N],w[N];
 int filter_N=60;
 int filter_FS_hz=48000;
@@ -164,13 +165,11 @@ int KEEPALIVE get_sample_rate() {
     return filter_FS_hz;
 }
 
-void set_sample_rate() {
-    
-}
-
-void set_cutoff_freq(int cutoff) {
-    if (cutoff < 0) {
+void KEEPALIVE set_cutoff_freq(int cutoff) {
+    printf(" cutoff=%d\n", cutoff);
+    if (cutoff <= 0) {
         cutoff = 0;
+        printf(" cutoff=%d\n", cutoff);
         filter_FC_hz = cutoff;
         return;
     }
@@ -178,9 +177,19 @@ void set_cutoff_freq(int cutoff) {
     if (cutoff > filter_FS_hz/2) {
         cutoff = filter_FS_hz/2;
         filter_FC_hz = cutoff;
-        filter_FC=1.0*cutoff/filter_FS_hz;
+        printf(" cutoff=%d\n", cutoff);
+        filter_FC=1.0*filter_FC_hz/filter_FS_hz;
         return;
     }
+    filter_FC_hz = cutoff;
+}
+
+void KEEPALIVE set_cutoff_plus_1k() {
+    set_cutoff_freq(filter_FC_hz+1000);
+}
+
+void KEEPALIVE set_cutoff_minus_1k() {
+    set_cutoff_freq(filter_FC_hz-1000);
 }
 
 int KEEPALIVE get_cutoff_freq() {
@@ -191,15 +200,31 @@ int KEEPALIVE get_tap_number() {
     return filter_N;
 }
 
-void set_tap_number(int tapN) {
+
+
+void KEEPALIVE set_tap_number(int tapN) {
     if (tapN<10) {
-        tapN = 10;
+        filter_N = 10;
         return;
-        
     }
+
+    if (tapN>N) {
+        filter_N = 100;
+        return;
+    }
+
+    filter_N = tapN;
+}
+
+void KEEPALIVE set_tap_number_plus_10() {
+    set_tap_number(filter_N+10);
+}
+
+void KEEPALIVE set_tap_number_minus_10() {
+    set_tap_number(filter_N-10);
 }
 
-int KEEPALIVE  recalculate_fir() {
+int KEEPALIVE  recalculate_fir(double *arr) {
     int i = 0;
     filter_FC=1.0*filter_FC_hz/filter_FS_hz;
     fir_lp.num_taps =filter_N;
@@ -220,7 +245,10 @@ int KEEPALIVE  recalculate_fir() {
     //firw_rect(&firw_lp);
     fir_convolute(&fir_lp, &firw_lp);
     //fir_print_matlab(&fir_lp);
-    return 0;
+    for (i=0;i<fir_lp.num_taps;i++) {
+        arr[i] = fir_lp.fir_coef[i];
+    }
+    return fir_lp.num_taps;
 }
 
 
@@ -236,6 +264,26 @@ void convert_dobule_up() {
     }
 }
 
+void cut_up() {
+    int i=0;
+    for (i=0;i<BUFSIZE4;i++) {
+        if (process_buf[i] > 1.0) process_buf[i] = 1.0;
+        if (process_buf[i] < -1.0) process_buf[i] = -1.0;
+    }
+}
+
+#ifdef __EMSCRIPTEN__
+int KEEPALIVE stop_loop() {
+    emscripten_pause_main_loop();
+    return 0;
+}
+
+int KEEPALIVE start_loop() {
+    emscripten_resume_main_loop();
+    return 0;
+}
+#endif
+
 void save_to_matlab(char *name) {
     int i;
     FILE *f=NULL;
@@ -368,6 +416,7 @@ int main_tick() {
                 
                                 fir_filter(&fir_lp, process_buf, PROCESS_BUF_SIZE, process_buf2, PROCESS_BUF_SIZE);
                                 memcpy(process_buf,process_buf2,PROCESS_BUF_SIZE*sizeof(double));
+                                cut_up();
                                 save_to_matlab("B2");
 #endif
                                 convert_double_to_f32();
@@ -403,7 +452,10 @@ int main_tick() {
             if( audio_buf_position > audio_rec_buffer_size )
             {
                 //Stop playing audio
+                //SDL_Delay(500);
                 SDL_PauseAudioDevice( playbackDeviceId, SDL_TRUE );
+                //printf("%d\n",SDL_GetQueuedAudioSize(playbackDeviceId));
+                //SDL_ClearQueuedAudio(playbackDeviceId);
                 current_state = RECORDED;
                 printf("State: RECORDED\n");
             }
-- 
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