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#!/usr/bin/env python
#Copyright (c) 2011, 2012 Walter Bender
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
from gettext import gettext as _
try:
from numpy import append
from numpy.fft import rfft
PITCH_AVAILABLE = True
except:
PITCH_AVAILABLE = False
from plugins.plugin import Plugin
from plugins.audio_sensors.audiograb import AudioGrab, \
SENSOR_DC_NO_BIAS, SENSOR_DC_BIAS, SENSOR_AC_BIAS
from plugins.audio_sensors.ringbuffer import RingBuffer1d
from TurtleArt.tapalette import make_palette
from TurtleArt.taconstants import XO1, XO15, XO175, XO30
from TurtleArt.talogo import primitive_dictionary
from TurtleArt.tautils import debug_output
import logging
_logger = logging.getLogger('turtleart-activity audio sensors plugin')
def _avg(array, abs_value=False):
''' Calc. the average value of an array '''
if len(array) == 0:
return 0
array_sum = 0
if abs_value:
for a in array:
array_sum += abs(a)
else:
for a in array:
array_sum += a
return float(array_sum) / len(array)
class Audio_sensors(Plugin):
def __init__(self, parent):
self._parent = parent
self._status = True # TODO: test for audio device
# These flags are referenced by audiograb
self.hw = self._parent.hw
self.running_sugar = self._parent.running_sugar
def setup(self):
''' set up audio-sensor-specific blocks '''
self.max_samples = 1500
self.input_step = 1
self.ringbuffer = []
palette = make_palette('sensor',
colors=["#FF6060", "#A06060"],
help_string=_('Palette of sensor blocks'),
position=6)
primitive_dictionary['sound'] = self.prim_sound
primitive_dictionary['volume'] = self.prim_volume
if self._status:
palette.add_block('sound',
style='box-style',
label=_('sound'),
help_string=_('raw microphone input signal'),
value_block=True,
prim_name='sound')
palette.add_block('volume',
style='box-style',
label=_('loudness'),
help_string=_('microphone input volume'),
value_block=True,
prim_name='volume')
else:
palette.add_block('sound',
hidden=True,
style='box-style',
label=_('sound'),
help_string=_('raw microphone input signal'),
value_block=True,
prim_name='sound')
palette.add_block('volume',
hidden=True,
style='box-style',
label=_('loudness'),
help_string=_('microphone input volume'),
value_block=True,
prim_name='volume')
self._parent.lc.def_prim(
'sound', 0, lambda self: primitive_dictionary['sound'](0))
self._parent.lc.def_prim(
'volume', 0, lambda self: primitive_dictionary['volume'](0))
primitive_dictionary['pitch'] = self.prim_pitch
if PITCH_AVAILABLE and self._status:
palette.add_block('pitch',
style='box-style',
label=_('pitch'),
help_string=_('microphone input pitch'),
value_block=True,
prim_name='pitch')
else:
palette.add_block('pitch',
hidden=True,
style='box-style',
label=_('pitch'),
help_string=_('microphone input pitch'),
value_block=True,
prim_name='pitch')
self._parent.lc.def_prim('pitch', 0,
lambda self: primitive_dictionary['pitch'](0))
primitive_dictionary['resistance'] = self.prim_resistance
primitive_dictionary['voltage'] = self.prim_voltage
if self.hw in [XO1, XO15, XO175, XO30] and self._status:
if self.hw == XO1:
self.voltage_gain = 0.00002225
self.voltage_bias = 1.140
elif self.hw == XO15:
self.voltage_gain = -0.0001471
self.voltage_bias = 1.695
elif self.hw == XO175:
self.voltage_gain = 0.000051
self.voltage_bias = 1.372
else: # XO 3.0
self.voltage_gain = 0.00007692
self.voltage_bias = 0.719
palette.add_block('resistance',
style='box-style',
label=_('resistance'),
help_string=_('microphone input resistance'),
value_block=True,
prim_name='resistance')
palette.add_block('voltage',
style='box-style',
label=_('voltage'),
help_string=_('microphone input voltage'),
value_block=True,
prim_name='voltage')
else:
palette.add_block('resistance',
hidden=True,
style='box-style',
label=_('resistance'),
help_string=_('microphone input resistance'),
prim_name='resistance')
palette.add_block('voltage',
hidden=True,
style='box-style',
label=_('voltage'),
help_string=_('microphone input voltage'),
prim_name='voltage')
if self.hw in [XO15, XO175, XO30] and self._status:
palette.add_block('resistance2',
style='box-style',
label=_('resistance') + '2',
help_string=_('microphone input resistance'),
value_block=True,
prim_name='resistance2')
palette.add_block('voltage2',
style='box-style',
label=_('voltage') + '2',
help_string=_('microphone input voltage'),
value_block=True,
prim_name='voltage2')
else:
palette.add_block('resistance2',
hidden=True,
style='box-style',
label=_('resistance') + '2',
help_string=_('microphone input resistance'),
prim_name='resistance2')
palette.add_block('voltage2',
hidden=True,
style='box-style',
label=_('voltage') + '2',
help_string=_('microphone input voltage'),
prim_name='voltage2')
self._parent.lc.def_prim(
'resistance', 0,
lambda self: primitive_dictionary['resistance'](0))
self._parent.lc.def_prim(
'voltage', 0, lambda self: primitive_dictionary['voltage'](0))
self._parent.lc.def_prim(
'resistance2', 0,
lambda self: primitive_dictionary['resistance'](1))
self._parent.lc.def_prim(
'voltage2', 0, lambda self: primitive_dictionary['voltage'](1))
self.audio_started = False
if self.hw in [XO175, XO30]:
self.PARAMETERS = {
SENSOR_AC_BIAS: (False, True, 80, True),
SENSOR_DC_NO_BIAS: (True, False, 80, False),
SENSOR_DC_BIAS: (True, True, 90, False)
}
elif self.hw == XO15:
self.PARAMETERS = {
SENSOR_AC_BIAS: (False, True, 80, True),
SENSOR_DC_NO_BIAS: (True, False, 80, False),
SENSOR_DC_BIAS: (True, True, 90, False)
}
elif self.hw == XO1:
self.PARAMETERS = {
SENSOR_AC_BIAS: (False, True, 40, True),
SENSOR_DC_NO_BIAS: (True, False, 0, False),
SENSOR_DC_BIAS: (True, True, 0, False)
}
else:
self.PARAMETERS = {
SENSOR_AC_BIAS: (None, True, 40, True),
SENSOR_DC_NO_BIAS: (True, False, 80, False),
SENSOR_DC_BIAS: (True, True, 90, False)
}
def start(self):
''' Start grabbing audio if there is an audio block in use '''
if not self._status:
return
if self.audio_started:
self.audiograb.stop_grabbing()
if len(self._parent.block_list.get_similar_blocks(
'block', ['volume', 'sound', 'pitch'])) > 0:
mode, bias, gain, boost = self.PARAMETERS[SENSOR_AC_BIAS]
elif len(self._parent.block_list.get_similar_blocks(
'block', ['resistance', 'resistance2'])) > 0:
mode, bias, gain, boost = self.PARAMETERS[SENSOR_DC_BIAS]
elif len(self._parent.block_list.get_similar_blocks(
'block', ['voltage', 'voltage2'])) > 0:
mode, bias, gain, boost = self.PARAMETERS[SENSOR_DC_NO_BIAS]
else:
return # No audio blocks in use.
self.audiograb = AudioGrab(self.new_buffer, self,
mode, bias, gain, boost)
self._channels = self.audiograb.channels
for i in range(self._channels):
self.ringbuffer.append(RingBuffer1d(self.max_samples,
dtype='int16'))
self.audiograb.start_grabbing()
self.audio_started = True
def new_buffer(self, buf, channel=0):
''' Append a new buffer to the ringbuffer '''
self.ringbuffer[channel].append(buf)
return True
def stop(self):
''' This gets called by the stop button '''
if self._status and self.audio_started:
self.audiograb.on_activity_quit() # reset all setting
self.audio_started = False
def goto_background(self):
''' This gets called when your process is sent to the background '''
pass
def return_to_foreground(self):
''' This gets called when your process returns from the background '''
pass
def quit(self):
''' This gets called by the quit button '''
if self._status and self.audio_started:
self.audiograb.on_activity_quit()
def _status_report(self):
debug_output(
'Reporting audio sensor status: %s' % (str(self._status)),
self._parent.running_sugar)
return self._status
# Block primitives used in talogo
def prim_volume(self, channel):
''' return mic in value '''
if not self._status:
return 0
buf = self.ringbuffer[channel].read(None, self.input_step)
if len(buf) > 0:
volume = float(_avg(buf, abs_value=True))
self._parent.lc.update_label_value('volume', volume)
return volume
else:
return 0
def prim_sound(self, channel):
''' return raw mic in value '''
if not self._status:
return 0
buf = self.ringbuffer[channel].read(None, self.input_step)
if len(buf) > 0:
sound = float(buf[0])
self._parent.lc.update_label_value('sound', sound)
return sound
else:
return 0
def prim_pitch(self, channel):
''' return index of max value in fft of mic in values '''
if not PITCH_AVAILABLE or not self._status:
return 0
buf = self.ringbuffer[channel].read(None, self.input_step)
if len(buf) > 0:
buf = rfft(buf)
buf = abs(buf)
maxi = buf.argmax()
if maxi == 0:
pitch = 0
else: # Simple interpolation
a, b, c = buf[maxi - 1], buf[maxi], buf[maxi + 1]
maxi -= a / float(a + b + c)
maxi += c / float(a + b + c)
pitch = maxi * 48000 / (len(buf) * 2)
self._parent.lc.update_label_value('pitch', pitch)
return pitch
else:
return 0
def prim_resistance(self, channel):
''' return resistance sensor value '''
if not self.hw in [XO1, XO15, XO175, XO30] or not self._status:
return 0
if self.hw == XO1 and channel != 0:
return 0
buf = self.ringbuffer[channel].read(None, self.input_step)
if len(buf) > 0:
# See <http://bugs.sugarlabs.org/ticket/552#comment:7>
# TODO: test this calibration on XO 1.5, XO 1.75
avg_buf = float(_avg(buf))
if self.hw == XO1:
resistance = 2.718 ** ((avg_buf * 0.000045788) + 8.0531)
elif self.hw == XO15:
if avg_buf > 0:
resistance = (420000000 / avg_buf) - 13500
else:
resistance = 420000000
elif self.hw == XO175:
if avg_buf < 30700:
resistance = (180000000 / (30700 - avg_buf)) - 3150
else:
resistance = 999999999
else: # XO 3.0
if avg_buf < 30514:
resistance = (46000000 / (30514 - avg_buf)) - 1150
else:
resistance = 999999999
if channel == 0:
self._parent.lc.update_label_value('resistance', resistance)
else:
self._parent.lc.update_label_value('resistance2', resistance)
if resistance < 0:
resistance = 0
return resistance
else:
return 0
def prim_voltage(self, channel):
''' return voltage sensor value '''
if not self.hw in [XO1, XO15, XO175, XO30] or not self._status:
return 0
if self.hw == XO1 and channel != 0:
return 0
buf = self.ringbuffer[channel].read(None, self.input_step)
if len(buf) > 0:
# See <http://bugs.sugarlabs.org/ticket/552#comment:7>
voltage = float(_avg(buf)) * self.voltage_gain + self.voltage_bias
if channel == 0:
self._parent.lc.update_label_value('voltage', voltage)
else:
self._parent.lc.update_label_value('voltage2', voltage)
return voltage
else:
return 0
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