Added some sample audio tracks to always be available

data/sampleaudio/SOURCE

@@ -0,0 +1 @@
+https://www2.cs.uic.edu/~i101/SoundFiles/

fileradio.py

@@ -0,0 +1,50 @@
+from streamer import Streamer, is_alive
+import subprocess
+import time
+import sys
+import os
+
+class FileRadio(Streamer):
+    PORT = 8554
+
+    def __init__(self, path):
+        self.path = path
+        self.basename = os.path.basename(self.path)
+        self.name, self.ext = os.path.splitext(self.basename)
+
+        super().__init__()
+
+    def _stream_path(self):
+        return f":{FileRadio.PORT}/sample/{self.name}"
+
+    def _stream_thread(self):
+        self.playback = subprocess.Popen(
+            [
+                '/usr/bin/ffmpeg', '-re', '-stream_loop', '-1', '-i',
+                f"{self.path}", '-c', 'copy',
+                '-f', 'rtsp', f"rtsp://localhost{self._stream_path()}"
+            ],
+            stdin=subprocess.PIPE,
+            stdout=subprocess.DEVNULL,
+            stderr=subprocess.DEVNULL
+        )
+
+        while self.run:
+            if not is_alive(self.playback):
+                print('Playback failed, aborting stream.', file=sys.stderr)
+                break
+            time.sleep(0.1)
+
+        self.run = False
+
+        self.playback.kill()
+        self.playback.wait()
+        self.playback = None
+
+
+if __name__ == '__main__':
+    fr = FileRadio('./data/sampleaudio/taunt.mp3')
+    fr.start_stream()
+
+    while True:
+        time.sleep(1)

microservice.py

@@ -1,9 +1,12 @@
 #! /usr/bin/env python3
 
+import os
+import sys
 import requests
 import SoapySDR as soapy
 from radio import Radio
 from tuuube import Tuuube
+from fileradio import FileRadio
 
 from flask import Flask, jsonify
 from flasgger import Swagger
@@ -257,6 +260,13 @@ if __name__ == '__main__':
         stderr=subprocess.DEVNULL
     )
 
+    for path, _, files in os.walk('./data/sampleaudio'):
+        for file in files:
+            name,ext = os.path.splitext(file)
+            if ext == '.mp3':
+              tubes[name] = FileRadio(f"{path}/{file}")
+              tubes[name].start_stream()
+
     app.run(
         host='0.0.0.0',
         threaded=True,

scripts/wav2mp3.sh

@@ -0,0 +1,8 @@
+#! /bin/bash
+
+for arg in "$@"; do
+    path="${arg%/*}"
+    file="${arg##*/}"
+    filename="${file%%.*}"
+    ffmpeg -i $path/$file -vn -ar 44100 -ac 2 -b:a 100k $path/$filename.mp3
+done