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"""
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)
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