Commit all testing programs

beepemu-pyaudio

@@ -0,0 +1,46 @@
+#!/usr/bin/python
+
+import math
+import os
+import sys
+import time
+import pyaudio
+
+p = pyaudio.PyAudio()
+sample_rate=44100
+stream = p.open(
+    format=pyaudio.paInt16,
+    channels=1,
+    rate=sample_rate,
+    output=True
+)
+stream.start_stream()
+
+i = 1
+f = 0
+l = 0
+while i < len(sys.argv):
+    if sys.argv[i] == '-f':
+        i += 1
+        f = float(sys.argv[i])
+    elif sys.argv[i] == '-l':
+        i += 1
+        l = float(sys.argv[i])/1000
+    elif sys.argv[i] == '-D':
+        i += 1
+        time.sleep(float(sys.argv[i])/1000)
+    if f != 0 and l != 0:
+        print(f, l)
+        # https://stackoverflow.com/questions/974071/python-library-for-playing-fixed-frequency-sound
+        num_samples = int(sample_rate * l)
+        rest_frames = num_samples % sample_rate
+        s = lambda i: 0.25 * math.sin(2 * math.pi * f * i / sample_rate)
+        samples = (int(s(i) * 0x7F + 0x80) for i in range(num_samples))
+        # write several samples at a time
+        for buf in zip( *([samples] * sample_rate) ):
+            stream.write(bytes(buf))
+        # fill remainder of frameset with silence
+        stream.write(b'\x80' * rest_frames)
+        f = 0
+        l = 0
+    i += 1