Add block customization to visual search

core/constants.py

@@ -15,6 +15,7 @@
                   BLACK=(50, 50, 50, 255),
                   GREEN=(142, 219, 176, 255),
                   RED=(241, 100, 100, 255),
+                  YELLOW=(255, 215, 0, 255),
                   BACKGROUND=(240, 240, 240, 255),
                   LIGHTGREY=(220, 220, 220, 255),
                   DARKGREY=(50, 50, 50, 255),

plugins/communications.py

@@ -5,6 +5,7 @@
 from string import ascii_uppercase, digits, ascii_lowercase
 from math import copysign
 from pathlib import Path
+import wave
 from pyglet.media import Player, SourceGroup, load
 from plugins.abstractplugin import AbstractPlugin
 from core.widgets import Radio, Simpletext
@@ -75,6 +76,7 @@ def __init__(self, label='', taskplacement='bottomleft', taskupdatetime=80):
         self.lastradioselected = None
         self.frequency_modulation = 0.1
         self.sound_path = None
+        self._empty_sample_path = None
 
         self.set_sample_sounds()
 
@@ -91,6 +93,7 @@ def set_sample_sounds(self):
             return
 
         self.sound_path = new_path
+        self._ensure_empty_sample()
         self.samples_path = [self.sound_path.joinpath(f'{i}.wav')
                              for i in [s for s in digits + ascii_lowercase] +
                              [this_radio.lower() for this_radio in self.parameters['promptlist']] +
@@ -101,6 +104,35 @@ def set_sample_sounds(self):
                 print(sample_needed, _(' does not exist'))
 
 
+    def _ensure_empty_sample(self):
+        if self.sound_path is None:
+            return None
+
+        empty_path = self.sound_path.joinpath('empty.wav')
+        if empty_path.exists():
+            self._empty_sample_path = empty_path
+            return empty_path
+
+        empty_path.parent.mkdir(parents=True, exist_ok=True)
+        with wave.open(str(empty_path), 'wb') as silent_file:
+            silent_file.setnchannels(1)
+            silent_file.setsampwidth(2)
+            silent_file.setframerate(44100)
+            silent_file.writeframes(b'\x00\x00' * 4410)
+
+        self._empty_sample_path = empty_path
+        return empty_path
+
+
+    def _load_audio_segment(self, name):
+        target = self.sound_path.joinpath(f'{name}.wav')
+        if not target.exists():
+            if name != 'empty':
+                print(target, _(' missing, using silence instead'))
+            target = self._empty_sample_path or self._ensure_empty_sample()
+        return load(str(target), streaming=False)
+
+
     def regenerate_callsigns(self):
         self.parameters['owncallsign'] = self.get_callsign()
         for i in range(self.parameters['othercallsignnumber']):
@@ -157,8 +189,7 @@ def group_audio_files(self, callsign, radio_name, freq):
 
         group = SourceGroup()
         for f in list_of_sounds:
-            source = load(str(self.sound_path.joinpath(f'{f}.wav')), streaming=False)
-            # print(f)
+            source = self._load_audio_segment(f)
             group.add(source)
         return group