def __init_alsa(self):
try:
self._device = PCM()
except ALSAAudioError as e:
logger.error('ERROR: Error al inicializar dispositivo ALSA: %s' %
str(e))
return
else:
for mixer in MIXER_PRIO:
try:
self._mixers[mixer] = Mixer(mixer)
except ALSAAudioError as e:
err = 'Warning: Error al inicializar mixer ALSA: %s'
logger.warning(err % str(e))
else:
if self._default_mixer is None:
self._default_mixer = mixer
import numpy
from numpy.fft import fft, ifft
from numpy.random import random_sample
from alsaaudio import PCM, PCM_NONBLOCK, PCM_FORMAT_FLOAT_LE
pcm = PCM() #mode=PCM_NONBLOCK)
pcm.setrate(44100)
pcm.setformat(PCM_FORMAT_FLOAT_LE)
pcm.setchannels(1)
pcm.setperiodsize(4096)
def sine_wave(x, freq=100):
sample = numpy.arange(x * 4096, (x + 1) * 4096, dtype=numpy.float32)
sample *= numpy.pi * 2 / 44100
sample *= freq
return numpy.sin(sample)
for x in xrange(1000):
sample = sine_wave(x, 100)
pcm.write(sample.tostring())
def build_playback_device(self):
self.playback_device = PCM(mode=PCM_NONBLOCK)
self.playback_device.setrate(48000)
self.playback_device.setperiodsize(960)
self.playback_device.setchannels(1)
def build_capture_device(self):
self.capture_device = PCM(PCM_CAPTURE, PCM_NONBLOCK)
self.capture_device.setrate(48000)
self.capture_device.setperiodsize(960)
self.capture_device.setchannels(1)
def capturarAudio(self):
self.captura = PCM(PCM_CAPTURE)
self.captura.setchannels(1) # default 2
self.captura.setrate(44100) # default 44100
self.captura.setformat(PCM_FORMAT_S16_LE) # default PCM_FORMAT_S16_LE
self.captura.setperiodsize(1024) # default 32
