# ----------------------------------------------------------------------------
# pyglet
# Copyright (c) 2006-2008 Alex Holkner
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'''Fallback driver producing no audio.
'''

__docformat__ = 'restructuredtext'
__version__ = '$Id$'

import time

from pyglet.media import AudioPlayer, Listener, AudioData
from pyglet.media import MediaException

class SilentAudioPlayer(AudioPlayer):
    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_system_time = time.time()

    def get_write_size(self):
        return max(0, 10000 - 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_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_system_time = system_time - head_time
            return head_time + self._audio_data_list[0].timestamp
        except IndexError:
            return 0.0

    def get_time(self):
        if not self._audio_data_list:
            return 0.0

        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

@@ -1959,24 +1959,53 @@
 dioPlayer):%0A
+    UPDATE_PERIOD = 0.1%0A    %0A
     def __in
@@ -2030,16 +2030,16 @@
 ormat):%0A
-
         
@@ -2209,32 +2209,67 @@
 head_time = 0.0%0A
+        self._head_timestamp = 0.0%0A
         self._he
@@ -2320,32 +2320,109 @@
 ite_size(self):%0A
+        bytes = int(self.audio_format.bytes_per_second * self.UPDATE_PERIOD)%0A
         return m
@@ -2431,13 +2431,13 @@
 (0, 
-10000
+bytes
  - s
@@ -2577,32 +2577,32 @@
 udio_data_list:%0A
-
             self
@@ -2611,32 +2611,88 @@
 head_time = 0.0%0A
+            self._head_timestamp = audio_data.timestamp%0A
             self
@@ -4022,111 +4022,115 @@
 ead_
-system_time = system_time - head_time%0A            return head
+timestamp = self._audio_data_list%5B0%5D.timestamp%0A            self._head_system
 _time 
-+ self._audio_data_list%5B0%5D.timestamp
+= system_time - head_time
 %0A   
@@ -4161,34 +4161,28 @@
             
-return 0.0
+pass
 %0A%0A    def ge
@@ -4252,19 +4252,75 @@
  return 
-0.0
+time.time() - self._head_system_time + self._head_timestamp
 %0A%0A      

Fix silent driver get_time