From cb84f7469e9e703c2ed0995eca9dcd37a5dd4f53 Mon Sep 17 00:00:00 2001
From: lwvmobile <lwvmobile@gmail.com>
Date: Mon, 26 Sep 2022 19:13:49 -0400
Subject: [PATCH] Mute Audio Option (-o null)

---
 src/dsd_audio.c   | 22 +++++++++++-----------
 src/dsd_main.c    | 10 ++++++++--
 src/dsd_ncurses.c | 34 +++++++++++++++++++++++++---------
 3 files changed, 44 insertions(+), 22 deletions(-)

diff --git a/src/dsd_audio.c b/src/dsd_audio.c
index 0c298f3..25ada7a 100644
--- a/src/dsd_audio.c
+++ b/src/dsd_audio.c
@@ -526,18 +526,18 @@ openAudioOutDevice (dsd_opts * opts, int speed)
 	else
 	{
 		struct stat stat_buf;
-  if(stat(opts->audio_out_dev, &stat_buf) != 0 && strncmp(opts->audio_out_dev, "pulse", 5 != 0)) //HERE
-    {
-      fprintf (stderr,"Error, couldn't open %s\n", opts->audio_out_dev);
-      exit(1);
-    }
+  // if(stat(opts->audio_out_dev, &stat_buf) != 0 && strncmp(opts->audio_out_dev, "pulse", 5 != 0)) //HERE
+  //   {
+  //     fprintf (stderr,"Error, couldn't open %s\n", opts->audio_out_dev);
+  //     exit(1);
+  //   }
 
-  if( (!(S_ISCHR(stat_buf.st_mode) || S_ISBLK(stat_buf.st_mode))) && strncmp(opts->audio_out_dev, "pulse", 5 != 0))
-    {
-      // this is not a device
-      fprintf (stderr,"Error, %s is not a device. use -w filename for wav output.\n", opts->audio_out_dev);
-      exit(1);
-    }
+  // if( (!(S_ISCHR(stat_buf.st_mode) || S_ISBLK(stat_buf.st_mode))) && strncmp(opts->audio_out_dev, "pulse", 5 != 0))
+  //   {
+  //     // this is not a device
+  //     fprintf (stderr,"Error, %s is not a device. use -w filename for wav output.\n", opts->audio_out_dev);
+  //     exit(1);
+  //   }
 	}
   fprintf (stderr,"Audio Out Device: %s\n", opts->audio_out_dev);
 }
diff --git a/src/dsd_main.c b/src/dsd_main.c
index ac1bfe7..6a60fd3 100644
--- a/src/dsd_main.c
+++ b/src/dsd_main.c
@@ -1596,12 +1596,18 @@ main (int argc, char **argv)
 
     if((strncmp(opts.audio_in_dev, "pulse", 5) == 0))
     {
-      opts.audio_in_type == 0;
+      opts.audio_in_type = 0;
     }
 
     if((strncmp(opts.audio_out_dev, "pulse", 5) == 0))
     {
-      opts.audio_out_type == 0;
+      opts.audio_out_type = 0;
+    }
+
+    if((strncmp(opts.audio_out_dev, "null", 4) == 0))
+    {
+      opts.audio_out_type = 9; //9 for NULL, or mute output
+      opts.audio_out = 0; //turn off so we won't playSynthesized
     }
 
     if (opts.playfiles == 1)
diff --git a/src/dsd_ncurses.c b/src/dsd_ncurses.c
index 325ff45..9e53f01 100644
--- a/src/dsd_ncurses.c
+++ b/src/dsd_ncurses.c
@@ -189,15 +189,15 @@ void beeper (dsd_opts * opts, dsd_state * state, int type)
       if (loop == 1)
       {
         //only beep on R if dmr_stereo is active and slot 2, else beep on L
-        if (type == 0 && state->dmr_stereo == 1)
+        if (type == 0 && state->dmr_stereo == 1 && opts->audio_out == 1)
         {
           pa_simple_write(opts->pulse_digi_dev_out, buf, sizeof(buf), NULL);
         }
-        if (type == 1 && state->dmr_stereo == 1)
+        if (type == 1 && state->dmr_stereo == 1 && opts->audio_out == 1)
         {
           pa_simple_write(opts->pulse_digi_dev_outR, buf, sizeof(buf), NULL);
         }
-        if (state->dmr_stereo == 0)
+        if (state->dmr_stereo == 0 && opts->audio_out == 1)
         {
           pa_simple_write(opts->pulse_digi_dev_out, buf, sizeof(buf), NULL);
         }
@@ -256,7 +256,7 @@ char *choicesc[] = {
       "Setup and Start RTL Input ",
       "Retune RTL Dongle         ",
       "                          ",
-      "                          ", //removing options no longer necesary or not recommended
+      "Toggle Audio Mute         ", //removing options no longer necesary or not recommended
       "Toggle NCurses Compact Mode",
       "Toggle NCurses Call History",
       "Stop All Decoded WAV Saving",
@@ -380,8 +380,11 @@ void ncursesOpen (dsd_opts * opts, dsd_state * state)
 //ncursesMenu
 void ncursesMenu (dsd_opts * opts, dsd_state * state)
 {
-  // state->menuopen = 1; //flag the menu is open, stop processing getFrameSync
-  closePulseOutput (opts);
+  //close pulse output if not null output
+  if (opts->audio_out == 1 && opts->audio_out_type == 0)
+  {
+    closePulseOutput (opts);
+  }
 
   if (opts->audio_in_type == 0) //close pulse input if it is the specified input method
   {
@@ -707,7 +710,16 @@ void ncursesMenu (dsd_opts * opts, dsd_state * state)
 
         if (choicec == 9)
         {
-          //vacant box
+          if (opts->audio_out == 0)
+          {
+            opts->audio_out = 1;
+            opts->audio_out_type = 0; 
+          }
+          else
+          {
+            opts->audio_out = 0;
+            opts->audio_out_type = 9;
+          }
         }
 
         if (choicec == 10)
@@ -1451,8 +1463,12 @@ void ncursesMenu (dsd_opts * opts, dsd_state * state)
 	refresh();
   state->menuopen = 0; //flag the menu is closed, resume processing getFrameSync
 
-  //reopen pulse output with new parameters
-  openPulseOutput (opts);
+  //reopen pulse output with new parameters, if not null output type
+  if (opts->audio_out == 1 && opts->audio_out_type == 0)
+  {
+    openPulseOutput (opts);
+  }
+  
 
   if (opts->audio_in_type == 0) //reopen pulse input if it is the specified input method
   {