Added PyDub

sbapp/pydub/playback.py

@@ -0,0 +1,71 @@
+"""
+Support for playing AudioSegments. Pyaudio will be used if it's installed,
+otherwise will fallback to ffplay. Pyaudio is a *much* nicer solution, but
+is tricky to install. See my notes on installing pyaudio in a virtualenv (on
+OSX 10.10): https://gist.github.com/jiaaro/9767512210a1d80a8a0d
+"""
+
+import subprocess
+from tempfile import NamedTemporaryFile
+from .utils import get_player_name, make_chunks
+
+def _play_with_ffplay(seg):
+    PLAYER = get_player_name()
+    with NamedTemporaryFile("w+b", suffix=".wav") as f:
+        seg.export(f.name, "wav")
+        subprocess.call([PLAYER, "-nodisp", "-autoexit", "-hide_banner", f.name])
+
+
+def _play_with_pyaudio(seg):
+    import pyaudio
+
+    p = pyaudio.PyAudio()
+    stream = p.open(format=p.get_format_from_width(seg.sample_width),
+                    channels=seg.channels,
+                    rate=seg.frame_rate,
+                    output=True)
+
+    # Just in case there were any exceptions/interrupts, we release the resource
+    # So as not to raise OSError: Device Unavailable should play() be used again
+    try:
+        # break audio into half-second chunks (to allows keyboard interrupts)
+        for chunk in make_chunks(seg, 500):
+            stream.write(chunk._data)
+    finally:
+        stream.stop_stream()
+        stream.close()
+
+        p.terminate()
+
+
+def _play_with_simpleaudio(seg):
+    import simpleaudio
+    return simpleaudio.play_buffer(
+        seg.raw_data,
+        num_channels=seg.channels,
+        bytes_per_sample=seg.sample_width,
+        sample_rate=seg.frame_rate
+    )
+
+
+def play(audio_segment):
+    try:
+        playback = _play_with_simpleaudio(audio_segment)
+        try:
+            playback.wait_done()
+        except KeyboardInterrupt:
+            playback.stop()
+    except ImportError:
+        pass
+    else:
+        return
+
+    try:
+        _play_with_pyaudio(audio_segment)
+        return
+    except ImportError:
+        pass
+    else:
+        return
+
+    _play_with_ffplay(audio_segment)