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#!/usr/bin/env python
# Simple test script that plays (some) wav files
from __future__ import print_function
import sys
import wave
import getopt
import alsaaudio
def play(device, f):
print('%d channels, %d sampling rate\n' % (f.getnchannels(),
f.getframerate()))
# Set attributes
device.setchannels(f.getnchannels())
device.setrate(f.getframerate())
# 8bit is unsigned in wav files
if f.getsampwidth() == 1:
device.setformat(alsaaudio.PCM_FORMAT_U8)
# Otherwise we assume signed data, little endian
elif f.getsampwidth() == 2:
device.setformat(alsaaudio.PCM_FORMAT_S16_LE)
elif f.getsampwidth() == 3:
device.setformat(alsaaudio.PCM_FORMAT_S24_LE)
elif f.getsampwidth() == 4:
device.setformat(alsaaudio.PCM_FORMAT_S32_LE)
else:
raise ValueError('Unsupported format')
periodsize = f.getframerate() // 8
device.setperiodsize(periodsize)
data = f.readframes(periodsize)
while data:
# Read data from stdin
device.write(data)
data = f.readframes(periodsize)
def usage():
print('usage: playwav.py [-d <device>] <file>', file=sys.stderr)
sys.exit(2)
if __name__ == '__main__':
device = 'default'
opts, args = getopt.getopt(sys.argv[1:], 'd:')
for o, a in opts:
if o == '-d':
device = a
if not args:
usage()
f = wave.open(args[0], 'rb')
device = alsaaudio.PCM(device=device)
play(device, f)
f.close()
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