auracaster/sw_pyalsaaudio
3
0
Fork 0
forked from auracaster/pyalsaaudio
Code Pull Requests Activity

Don't use setrate etc. in samples.

Browse Source
This commit is contained in:
Lars Immisch
2020-07-09 21:22:06 +02:00
parent 2a21bf6c42
commit df889b94ef
5 changed files with 78 additions and 96 deletions
Download Patch File Download Diff File Expand all files Collapse all files

82
playwav.py
View File

@@ -1,4 +1,5 @@
#!/usr/bin/env python
#!/usr/bin/env python3
# -*- mode: python; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*-
# Simple test script that plays (some) wav files
@@ -9,57 +10,52 @@ import wave
import getopt
import alsaaudio
def play(device, f):
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())
format = None
# 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_3LE)
elif f.getsampwidth() == 4:
device.setformat(alsaaudio.PCM_FORMAT_S32_LE)
else:
raise ValueError('Unsupported format')
# 8bit is unsigned in wav files
if f.getsampwidth() == 1:
format = alsaaudio.PCM_FORMAT_U8
# Otherwise we assume signed data, little endian
elif f.getsampwidth() == 2:
format = alsaaudio.PCM_FORMAT_S16_LE
elif f.getsampwidth() == 3:
format = alsaaudio.PCM_FORMAT_S24_3LE
elif f.getsampwidth() == 4:
format = alsaaudio.PCM_FORMAT_S32_LE
else:
raise ValueError('Unsupported format')
periodsize = f.getframerate() // 8
print('%d channels, %d sampling rate\n' % (f.getnchannels(),
f.getframerate()))
device.setperiodsize(periodsize)
data = f.readframes(periodsize)
while data:
# Read data from stdin
device.write(data)
data = f.readframes(periodsize)
periodsize = f.getframerate() // 8
device = alsaaudio.PCM(channels=f.getnchannels(), rate=f.getframerate(), format=format, periodsize=periodsize, device=device)
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)
print('usage: playwav.py [-d <device>] <file>', file=sys.stderr)
sys.exit(2)
if __name__ == '__main__':
device = 'default'
device = 'default'
opts, args = getopt.getopt(sys.argv[1:], 'd:')
for o, a in opts:
if o == '-d':
device = a
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()
if not args:
usage()
with wave.open(args[0], 'rb') as f:
play(device, f)