mirror of
https://github.com/larsimmisch/pyalsaaudio.git
synced 2026-06-03 03:47:02 +00:00
Don't use setrate etc. in samples.
This commit is contained in:
Lars Immisch
@@ -56,10 +56,7 @@ class SinePlayer(Thread):
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def __init__(self, frequency = 440.0):
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Thread.__init__(self)
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self.setDaemon(True)
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self.device = alsaaudio.PCM()
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self.device.setchannels(channels)
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self.device.setformat(format)
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self.device.setrate(sampling_rate)
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self.device = alsaaudio.PCM(channels=channels, format=format, rate=sampling_rate)
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self.queue = Queue()
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self.change(frequency)
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+4
-10
@@ -1,4 +1,5 @@
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#!/usr/bin/env python
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#!/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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## playbacktest.py
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##
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@@ -38,18 +39,11 @@ if __name__ == '__main__':
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f = open(args[0], 'rb')
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# Open the device in playback mode.
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out = alsaaudio.PCM(alsaaudio.PCM_PLAYBACK, device=device)
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# Set attributes: Mono, 44100 Hz, 16 bit little endian frames
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out.setchannels(1)
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out.setrate(44100)
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out.setformat(alsaaudio.PCM_FORMAT_S16_LE)
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# Open the device in playback mode in Mono, 44100 Hz, 16 bit little endian frames
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# The period size controls the internal number of frames per period.
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# The significance of this parameter is documented in the ALSA api.
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out.setperiodsize(160)
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out = alsaaudio.PCM(alsaaudio.PCM_PLAYBACK, channels=1, rate=44100, format=alsaaudio.PCM_FORMAT_S16_LE, periodsize=160, device=device)
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# Read data from stdin
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data = f.read(320)
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while data:
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+39
-43
@@ -1,4 +1,5 @@
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#!/usr/bin/env python
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#!/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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@@ -9,57 +10,52 @@ 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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def play(device, f):
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print('%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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format = None
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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_3LE)
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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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# 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\n' % (f.getnchannels(),
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f.getframerate()))
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device.setperiodsize(periodsize)
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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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periodsize = f.getframerate() // 8
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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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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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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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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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f = wave.open(args[0], 'rb')
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device = alsaaudio.PCM(device=device)
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play(device, f)
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f.close()
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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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+33
-38
@@ -1,4 +1,5 @@
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#!/usr/bin/env python
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#!/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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## recordtest.py
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##
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@@ -22,48 +23,42 @@ import getopt
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import alsaaudio
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def usage():
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print('usage: recordtest.py [-d <device>] <file>', file=sys.stderr)
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sys.exit(2)
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print('usage: recordtest.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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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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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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if not args:
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usage()
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f = open(args[0], 'wb')
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f = open(args[0], 'wb')
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# Open the device in nonblocking capture mode. The last argument could
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# just as well have been zero for blocking mode. Then we could have
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# left out the sleep call in the bottom of the loop
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inp = alsaaudio.PCM(alsaaudio.PCM_CAPTURE, alsaaudio.PCM_NONBLOCK, device=device)
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# Open the device in nonblocking capture mode in mono, with a sampling rate of 44100 Hz
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# and 16 bit little endian samples
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# The period size controls the internal number of frames per period.
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# The significance of this parameter is documented in the ALSA api.
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# For our purposes, it is suficcient to know that reads from the device
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# will return this many frames. Each frame being 2 bytes long.
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# This means that the reads below will return either 320 bytes of data
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# or 0 bytes of data. The latter is possible because we are in nonblocking
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# mode.
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inp = alsaaudio.PCM(alsaaudio.PCM_CAPTURE, alsaaudio.PCM_NONBLOCK,
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channels=1, rate=44100, format=alsaaudio.PCM_FORMAT_S16_LE,
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periodsize=160, device=device)
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# Set attributes: Mono, 44100 Hz, 16 bit little endian samples
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inp.setchannels(1)
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inp.setrate(44100)
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inp.setformat(alsaaudio.PCM_FORMAT_S16_LE)
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# The period size controls the internal number of frames per period.
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# The significance of this parameter is documented in the ALSA api.
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# For our purposes, it is suficcient to know that reads from the device
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# will return this many frames. Each frame being 2 bytes long.
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# This means that the reads below will return either 320 bytes of data
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# or 0 bytes of data. The latter is possible because we are in nonblocking
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# mode.
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inp.setperiodsize(160)
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loops = 1000000
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while loops > 0:
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loops -= 1
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# Read data from device
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l, data = inp.read()
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if l:
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f.write(data)
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time.sleep(.001)
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loops = 1000000
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while loops > 0:
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loops -= 1
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# Read data from device
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l, data = inp.read()
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if l:
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f.write(data)
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time.sleep(.001)
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