mirror of
https://github.com/larsimmisch/pyalsaaudio.git
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64 lines
1.4 KiB
Python
Executable File
64 lines
1.4 KiB
Python
Executable File
#!/usr/bin/env python3
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# -*- mode: python; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*-
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# Simple test script that plays (some) wav files
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from __future__ import print_function
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import sys
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import wave
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import getopt
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import alsaaudio
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def play(device, f):
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format = None
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# 8bit is unsigned in wav files
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if f.getsampwidth() == 1:
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format = alsaaudio.PCM_FORMAT_U8
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# Otherwise we assume signed data, little endian
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elif f.getsampwidth() == 2:
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format = alsaaudio.PCM_FORMAT_S16_LE
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elif f.getsampwidth() == 3:
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format = alsaaudio.PCM_FORMAT_S24_3LE
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elif f.getsampwidth() == 4:
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format = alsaaudio.PCM_FORMAT_S32_LE
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else:
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raise ValueError('Unsupported format')
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periodsize = f.getframerate() // 8
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print('%d channels, %d sampling rate, format %d, periodsize %d\n' % (f.getnchannels(),
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f.getframerate(),
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format,
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periodsize))
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device = alsaaudio.PCM(channels=f.getnchannels(), rate=f.getframerate(), format=format, periodsize=periodsize, device=device)
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data = f.readframes(periodsize)
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while data:
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# Read data from stdin
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device.write(data)
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data = f.readframes(periodsize)
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def usage():
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print('usage: playwav.py [-d <device>] <file>', file=sys.stderr)
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sys.exit(2)
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if __name__ == '__main__':
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device = 'default'
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opts, args = getopt.getopt(sys.argv[1:], 'd:')
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for o, a in opts:
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if o == '-d':
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device = a
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if not args:
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usage()
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with wave.open(args[0], 'rb') as f:
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play(device, f)
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