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#!/usr/bin/env python
#Copyright (c) 2011 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_Unknown, AudioGrab_XO1, \
AudioGrab_XO15, SENSOR_DC_NO_BIAS, SENSOR_DC_BIAS
from plugins.audio_sensors.ringbuffer import RingBuffer1d
from TurtleArt.tapalette import make_palette
from TurtleArt.taconstants import XO1, XO15, XO175
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 = RingBuffer1d(self.max_samples, dtype='int16')
palette = make_palette('sensor',
colors=["#FF6060", "#A06060"],
help_string=_('Palette of sensor blocks'))
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']())
self._parent.lc.def_prim(
'volume', 0, lambda self: primitive_dictionary['volume']())
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']())
primitive_dictionary['resistance'] = self.prim_resistance
primitive_dictionary['voltage'] = self.prim_voltage
# FIXME: XO175 drivers don't work yet
if self.hw in [XO1, XO15] 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
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'),
value_block=True,
prim_name='resistance')
palette.add_block('voltage',
hidden=True,
style='box-style',
label=_('voltage'),
help_string=_('microphone input voltage'),
value_block=True,
prim_name='resistance')
self._parent.lc.def_prim(
'resistance', 0, lambda self: primitive_dictionary['resistance']())
self._parent.lc.def_prim(
'voltage', 0, lambda self: primitive_dictionary['voltage']())
self.audio_started = False
def start(self):
# This gets called by the start button
if not self._status:
return
''' Start grabbing audio if there is an audio block in use '''
if len(self._parent.block_list.get_similar_blocks('block',
['volume', 'sound', 'pitch', 'resistance', 'voltage'])) > 0:
if self.audio_started:
self.audiograb.resume_grabbing()
else:
if self.hw == XO15:
self.audiograb = AudioGrab_XO15(self.new_buffer, self)
elif self.hw == XO1:
self.audiograb = AudioGrab_XO1(self.new_buffer, self)
else:
self.audiograb = AudioGrab_Unknown(self.new_buffer, self)
self.audiograb.start_grabbing()
self.audio_started = True
self._update_audio_mode()
def new_buffer(self, buf):
''' Append a new buffer to the ringbuffer '''
self.ringbuffer.append(buf)
return True
def _update_audio_mode(self):
''' If there are sensor blocks, set the appropriate audio mode '''
if not hasattr(self._parent.lc, 'value_blocks_to_update'):
return
for name in ['sound', 'volume', 'pitch']:
if name in self._parent.lc.value_blocks_to_update:
if len(self._parent.lc.value_blocks_to_update[name]) > 0:
self.audiograb.set_sensor_type()
return
if 'resistance' in self._parent.lc.value_blocks_to_update:
if len(self._parent.lc.value_blocks_to_update['resistance']) > 0:
self.audiograb.set_sensor_type(SENSOR_DC_BIAS)
return
if 'voltage' in self._parent.lc.value_blocks_to_update:
if len(self._parent.lc.value_blocks_to_update['voltage']) > 0:
self.audiograb.set_sensor_type(SENSOR_DC_NO_BIAS)
return
def stop(self):
# This gets called by the stop button
if self._status and self.audio_started:
self.audiograb.pause_grabbing()
def goto_background(self):
# This gets called when your process is sent to the background
# TODO: handle this case
pass
def return_to_foreground(self):
# This gets called when your process returns from the background
# TODO: handle this case
pass
def quit(self):
# This gets called by the quit button
if self._status and self.audio_started:
self.audiograb.stop_grabbing()
def _status_report(self):
debug_output('Reporting audio sensor status: %s' % (str(self._status)))
return self._status
# Block primitives used in talogo
def prim_volume(self):
''' return mic in value '''
#TODO: Adjust gain for different HW
if not self._status:
return 0
buf = self.ringbuffer.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):
''' return raw mic in value '''
if not self._status:
return 0
buf = self.ringbuffer.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):
''' return index of max value in fft of mic in values '''
if not PITCH_AVAILABLE or not self._status:
return 0
buf = []
for i in range(4):
buf = append(buf, self.ringbuffer.read(None, self.input_step))
if len(buf) > 0:
r = []
for j in rfft(buf):
r.append(abs(j))
# Convert output to Hertz
pitch = r.index(max(r)) * 48000 / len(buf)
self._parent.lc.update_label_value('pitch', pitch)
return pitch
else:
return 0
def prim_resistance(self):
''' return resistance sensor value '''
if not self.hw in [XO1, XO15] or not self._status:
return 0
buf = self.ringbuffer.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
if self.hw == XO1:
resistance = 2.718 ** ((float(_avg(buf)) * 0.000045788) + \
8.0531)
else:
avg_buf = float(_avg(buf))
if avg_buf > 0:
resistance = (420000000 / avg_buf) - 13500
else:
resistance = 420000000
self._parent.lc.update_label_value('resistance', resistance)
return resistance
else:
return 0
def prim_voltage(self):
''' return voltage sensor value '''
if not self.hw in [XO1, XO15] or not self._status:
return 0
buf = self.ringbuffer.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
self._parent.lc.update_label_value('voltage', voltage)
return voltage
else:
return 0
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