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