/usr/lib/python2.7/dist-packages/pyglet/media/drivers/silent.py is in python-pyglet 1.1.4.dfsg-3.
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# pyglet
# Copyright (c) 2006-2008 Alex Holkner
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# * Neither the name of pyglet nor the names of its
# contributors may be used to endorse or promote products
# derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ----------------------------------------------------------------------------
'''Fallback driver producing no audio.
'''
__docformat__ = 'restructuredtext'
__version__ = '$Id: silent.py 1680 2008-01-27 09:13:50Z Alex.Holkner $'
import time
from pyglet.media import AudioPlayer, Listener, AudioData
from pyglet.media import MediaException
class SilentAudioPlayer(AudioPlayer):
UPDATE_PERIOD = 0.1
def __init__(self, audio_format):
super(SilentAudioPlayer, self).__init__(audio_format)
self._playing = False
self._eos_count = 0
self._audio_data_list = []
self._head_time = 0.0
self._head_timestamp = 0.0
self._head_system_time = time.time()
def get_write_size(self):
bytes = int(self.audio_format.bytes_per_second * self.UPDATE_PERIOD)
return max(0, bytes - sum(
[a.length for a in self._audio_data_list if a is not None]))
def write(self, audio_data):
if not self._audio_data_list:
self._head_time = 0.0
self._head_timestamp = audio_data.timestamp
self._head_system_time = time.time()
self._audio_data_list.append(
AudioData(None,
audio_data.length,
audio_data.timestamp,
audio_data.duration))
audio_data.consume(audio_data.length, self.audio_format)
def write_eos(self):
if self._audio_data_list:
self._audio_data_list.append(None)
def write_end(self):
pass
def play(self):
self._playing = True
self._head_system_time = time.time()
def stop(self):
self._playing = False
self._head_time = time.time() - self._head_system_time
def clear(self):
self._audio_data_list = []
self._head_time = 0.0
self._head_system_time = time.time()
self._eos_count = 0
def pump(self):
if not self._playing:
return
system_time = time.time()
head_time = system_time - self._head_system_time
try:
while head_time >= self._audio_data_list[0].duration:
head_time -= self._audio_data_list[0].duration
self._audio_data_list.pop(0)
while self._audio_data_list[0] is None:
self._eos_count += 1
self._audio_data_list.pop(0)
self._head_timestamp = self._audio_data_list[0].timestamp
self._head_system_time = system_time - head_time
except IndexError:
pass
def get_time(self):
if not self._audio_data_list:
return time.time() - self._head_system_time + self._head_timestamp
if self._playing:
system_time = time.time()
head_time = system_time - self._head_system_time
return head_time + self._audio_data_list[0].timestamp
else:
return self._audio_data_list[0].timestamp + self._head_time
def clear_eos(self):
if self._eos_count:
self._eos_count -= 1
return True
return False
class SilentListener(Listener):
def _set_volume(self, volume):
self._volume = volume
def _set_position(self, position):
self._position = position
def _set_velocity(self, velocity):
self._velocity = velocity
def _set_forward_orientation(self, orientation):
self._forward_orientation = orientation
def _set_up_orientation(self, orientation):
self._up_orientation = orientation
def _set_doppler_factor(self, factor):
self._doppler_factor = factor
def _set_speed_of_sound(self, speed_of_sound):
self._speed_of_sound = speed_of_sound
def driver_init():
pass
driver_listener = SilentListener()
driver_audio_player_class = SilentAudioPlayer
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