forked from auracaster/pyalsaaudio
3c0469c0fc
git-svn-id: svn://svn.code.sf.net/p/pyalsaaudio/code/trunk@37 ec2f30ec-7544-0410-870e-f70ca00c83f0
67 lines
1.6 KiB
Python
Executable File
67 lines
1.6 KiB
Python
Executable File
#!/usr/bin/env python
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# Simple test script that plays (some) wav files
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# Footnote: I'd normally use print instead of sys.std(out|err).write,
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# but this version runs on python 2 and python 3 without conversion
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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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sys.stdout.write('%d channels, %d sampling rate\n' % (f.getnchannels(),
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f.getframerate()))
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# Set attributes
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device.setchannels(f.getnchannels())
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device.setrate(f.getframerate())
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# 8bit is unsigned in wav files
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if f.getsampwidth() == 1:
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device.setformat(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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device.setformat(alsaaudio.PCM_FORMAT_S16_LE)
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elif f.getsampwidth() == 3:
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device.setformat(alsaaudio.PCM_FORMAT_S24_LE)
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elif f.getsampwidth() == 4:
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device.setformat(alsaaudio.PCM_FORMAT_S32_LE)
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else:
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raise ValueError('Unsupported format')
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device.setperiodsize(320)
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data = f.readframes(320)
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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(320)
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def usage():
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sys.stderr.write('usage: playwav.py [-c <card>] <file>\n')
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sys.exit(2)
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if __name__ == '__main__':
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card = 'default'
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opts, args = getopt.getopt(sys.argv[1:], 'c:')
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for o, a in opts:
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if o == '-c':
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card = a
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if not args:
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usage()
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f = wave.open(args[0], 'rb')
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device = alsaaudio.PCM(card=card)
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play(device, f)
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f.close()
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