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