Initial release

SW V La confrontation culte.py

@@ -0,0 +1,40 @@
+import wave
+
+filename = "message"
+sound = wave.open(filename+".wav")
+
+sound_secret = wave.open(filename+"_decode.wav", "wb")
+sound_secret.setnchannels(1)
+sound_secret.setsampwidth(sound.getsampwidth())
+sound_secret.setframerate(sound.getframerate()*1.25)
+
+frames = sound.getnframes()
+framerate = sound.getframerate()
+
+f1 = framerate//12
+f2 = framerate//2
+
+offset = 0
+while offset < frames:
+    for f in range(offset, offset+f1):
+        if f <= frames:
+            frame = sound.readframes(1)
+            sound_secret.writeframes(frame)
+            sound_secret.writeframes(frame)
+            sound_secret.writeframes(frame)
+        else:
+            sound_secret.writeframes(b'\x00\x00')
+    offset += f1
+
+    for f in range(offset, offset+f2):
+        if f <= frames:
+            if f%2 == 0:
+                sound_secret.writeframes(sound.readframes(1))
+            else:
+                sound.readframes(1)
+        else:
+            sound_secret.writeframes(b'\x00\x00')
+    offset += f2
+
+sound_secret.close()
+sound.close()