"""High-level sound and video player.""" import time from collections import deque import pyglet from pyglet.gl import GL_TEXTURE_2D from pyglet.media import buffered_logger as bl from pyglet.media.drivers import get_audio_driver from pyglet.media.codecs.base import Source, SourceGroup _debug = pyglet.options['debug_media'] class PlaybackTimer: """Playback Timer. This is a simple timer object which tracks the time elapsed. It can be paused and reset. """ def __init__(self): """Initialize the timer with time 0.""" self._time = 0.0 self._systime = None def start(self): """Start the timer.""" self._systime = time.time() def pause(self): """Pause the timer.""" self._time = self.get_time() self._systime = None def reset(self): """Reset the timer to 0.""" self._time = 0.0 if self._systime is not None: self._systime = time.time() def get_time(self): """Get the elapsed time.""" if self._systime is None: now = self._time else: now = time.time() - self._systime + self._time return now def set_time(self, value): """ Manually set the elapsed time. Args: value (float): the new elapsed time value """ self.reset() self._time = value class _PlayerProperty: """Descriptor for Player attributes to forward to the AudioPlayer. We want the Player to have attributes like volume, pitch, etc. These are actually implemented by the AudioPlayer. So this descriptor will forward an assignement to one of the attributes to the AudioPlayer. For example `player.volume = 0.5` will call `player._audio_player.set_volume(0.5)`. The Player class has default values at the class level which are retrieved if not found on the instance. """ def __init__(self, attribute, doc=None): self.attribute = attribute self.__doc__ = doc or '' def __get__(self, obj, objtype=None): if obj is None: return self if '_' + self.attribute in obj.__dict__: return obj.__dict__['_' + self.attribute] return getattr(objtype, '_' + self.attribute) def __set__(self, obj, value): obj.__dict__['_' + self.attribute] = value if obj._audio_player: getattr(obj._audio_player, 'set_' + self.attribute)(value) class Player(pyglet.event.EventDispatcher): """High-level sound and video player.""" # Spacialisation attributes, preserved between audio players _volume = 1.0 _min_distance = 1.0 _max_distance = 100000000. _position = (0, 0, 0) _pitch = 1.0 _cone_orientation = (0, 0, 1) _cone_inner_angle = 360. _cone_outer_angle = 360. _cone_outer_gain = 1. def __init__(self): """Initialize the Player with a MasterClock.""" self._source = None self._playlists = deque() self._audio_player = None self._context = pyglet.gl.current_context self._texture = None # Desired play state (not an indication of actual state). self._playing = False self._timer = PlaybackTimer() #: Loop the current source indefinitely or until #: :meth:`~Player.next_source` is called. Defaults to ``False``. #: #: :type: bool #: #: .. versionadded:: 1.4 self.loop = False def __del__(self): """Release the Player resources.""" self.delete() def queue(self, source): """ Queue the source on this player. If the player has no source, the player will start to play immediately or pause depending on its :attr:`.playing` attribute. Args: source (Source or Iterable[Source]): The source to queue. """ if isinstance(source, (Source, SourceGroup)): source = _one_item_playlist(source) else: try: source = iter(source) except TypeError: raise TypeError("source must be either a Source or an iterable." " Received type {0}".format(type(source))) self._playlists.append(source) if self.source is None: source = next(self._playlists[0]) self._source = source.get_queue_source() self._set_playing(self._playing) def _set_playing(self, playing): # stopping = self._playing and not playing # starting = not self._playing and playing self._playing = playing source = self.source if playing and source: if source.audio_format: if self._audio_player is None: self._create_audio_player() if self._audio_player: # We succesfully created an audio player self._audio_player.prefill_audio() if bl.logger is not None: bl.logger.init_wall_time() bl.logger.log("p.P._sp", 0.0) if source.video_format: if not self._texture: self._create_texture() if self._audio_player: self._audio_player.play() if source.video_format: pyglet.clock.schedule_once(self.update_texture, 0) # For audio synchronization tests, the following will # add a delay to de-synchronize the audio. # Negative number means audio runs ahead. # self._mclock._systime += -0.3 self._timer.start() if self._audio_player is None and source.video_format is None: pyglet.clock.schedule_once(lambda dt: self.dispatch_event("on_eos"), source.duration) else: if self._audio_player: self._audio_player.stop() pyglet.clock.unschedule(self.update_texture) self._timer.pause() @property def playing(self): """ bool: Read-only. Determine if the player state is playing. The *playing* property is irrespective of whether or not there is actually a source to play. If *playing* is ``True`` and a source is queued, it will begin to play immediately. If *playing* is ``False``, it is implied that the player is paused. There is no other possible state. """ return self._playing def play(self): """Begin playing the current source. This has no effect if the player is already playing. """ self._set_playing(True) def pause(self): """Pause playback of the current source. This has no effect if the player is already paused. """ self._set_playing(False) def delete(self): """Release the resources acquired by this player. The internal audio player and the texture will be deleted. """ if self._source: self.source.is_player_source = False if self._audio_player: self._audio_player.delete() self._audio_player = None if self._texture: self._texture = None def next_source(self): """Move immediately to the next source in the current playlist. If the playlist is empty, discard it and check if another playlist is queued. There may be a gap in playback while the audio buffer is refilled. """ was_playing = self._playing self.pause() self._timer.reset() if self._source: # Reset source to the beginning self.seek(0.0) self.source.is_player_source = False playlists = self._playlists if not playlists: return try: new_source = next(playlists[0]) except StopIteration: self._playlists.popleft() if not self._playlists: new_source = None else: # Could someone queue an iterator which is empty?? new_source = next(self._playlists[0]) if new_source is None: self._source = None self.delete() self.dispatch_event('on_player_eos') else: old_audio_format = self._source.audio_format old_video_format = self._source.video_format self._source = new_source.get_queue_source() if self._audio_player: if old_audio_format == self._source.audio_format: self._audio_player.clear() self._audio_player.source = self._source else: self._audio_player.delete() self._audio_player = None if old_video_format != self._source.video_format: self._texture = None pyglet.clock.unschedule(self.update_texture) self._set_playing(was_playing) self.dispatch_event('on_player_next_source') def seek(self, timestamp): """ Seek for playback to the indicated timestamp on the current source. Timestamp is expressed in seconds. If the timestamp is outside the duration of the source, it will be clamped to the end. Args: timestamp (float): The time where to seek in the source, clamped to the beginning and end of the source. """ playing = self._playing if playing: self.pause() if not self.source: return if bl.logger is not None: bl.logger.log("p.P.sk", timestamp) timestamp = max(timestamp, 0) self._timer.set_time(timestamp) self._source.seek(timestamp) if self._audio_player: # XXX: According to docstring in AbstractAudioPlayer this cannot # be called when the player is not stopped self._audio_player.clear() if self.source.video_format: self.update_texture() pyglet.clock.unschedule(self.update_texture) self._set_playing(playing) def _create_audio_player(self): assert not self._audio_player assert self.source source = self.source audio_driver = get_audio_driver() if audio_driver is None: # Failed to find a valid audio driver return self._audio_player = audio_driver.create_audio_player(source, self) # Set the audio player attributes for attr in ('volume', 'min_distance', 'max_distance', 'position', 'pitch', 'cone_orientation', 'cone_inner_angle', 'cone_outer_angle', 'cone_outer_gain'): value = getattr(self, attr) setattr(self, attr, value) @property def source(self): """Source: Read-only. The current :class:`Source`, or ``None``.""" return self._source @property def time(self): """ float: Read-only. Current playback time of the current source. The playback time is a float expressed in seconds, with 0.0 being the beginning of the media. The playback time returned represents the player master clock time which is used to synchronize both the audio and the video. """ return self._timer.get_time() def _create_texture(self): video_format = self.source.video_format self._texture = pyglet.image.Texture.create(video_format.width, video_format.height, GL_TEXTURE_2D) self._texture = self._texture.get_transform(flip_y=True) # After flipping the texture along the y axis, the anchor_y is set # to the top of the image. We want to keep it at the bottom. self._texture.anchor_y = 0 return self._texture @property def texture(self): """ :class:`pyglet.image.Texture`: Get the texture for the current video frame. You should call this method every time you display a frame of video, as multiple textures might be used. The return value will be None if there is no video in the current source. """ return self._texture def get_texture(self): """ Get the texture for the current video frame. You should call this method every time you display a frame of video, as multiple textures might be used. The return value will be None if there is no video in the current source. Returns: :class:`pyglet.image.Texture` .. deprecated:: 1.4 Use :attr:`~texture` instead """ return self.texture def refill_buffer(self): raise NotImplemented def seek_next_frame(self): """Step forwards one video frame in the current source.""" time = self.source.get_next_video_timestamp() if time is None: return self.seek(time) def update_texture(self, dt=None): """Manually update the texture from the current source. This happens automatically, so you shouldn't need to call this method. Args: dt (float): The time elapsed since the last call to ``update_texture``. """ # self.pr.disable() # if dt > 0.05: # print("update_texture dt:", dt) # import pstats # ps = pstats.Stats(self.pr).sort_stats("cumulative") # ps.print_stats() source = self.source time = self.time if bl.logger is not None: bl.logger.log( "p.P.ut.1.0", dt, time, self._audio_player.get_time() if self._audio_player else 0, bl.logger.rebased_wall_time() ) frame_rate = source.video_format.frame_rate frame_duration = 1 / frame_rate ts = source.get_next_video_timestamp() # Allow up to frame_duration difference while ts is not None and ts + frame_duration < time: source.get_next_video_frame() # Discard frame if bl.logger is not None: bl.logger.log("p.P.ut.1.5", ts) ts = source.get_next_video_timestamp() if bl.logger is not None: bl.logger.log("p.P.ut.1.6", ts) if ts is None: # No more video frames to show. End of video stream. if bl.logger is not None: bl.logger.log("p.P.ut.1.7", frame_duration) pyglet.clock.schedule_once(self._video_finished, 0) return elif ts > time: # update_texture called too early (probably manually!) pyglet.clock.schedule_once(self.update_texture, ts - time) return image = source.get_next_video_frame() if image is not None: with self._context: if self._texture is None: self._create_texture() self._texture.blit_into(image, 0, 0, 0) elif bl.logger is not None: bl.logger.log("p.P.ut.1.8") ts = source.get_next_video_timestamp() if ts is None: delay = frame_duration else: delay = ts - time delay = max(0.0, delay) if bl.logger is not None: bl.logger.log("p.P.ut.1.9", delay, ts) pyglet.clock.schedule_once(self.update_texture, delay) # self.pr.enable() def _video_finished(self, dt): if self._audio_player is None: self.dispatch_event("on_eos") volume = _PlayerProperty('volume', doc=""" The volume level of sound playback. The nominal level is 1.0, and 0.0 is silence. The volume level is affected by the distance from the listener (if positioned). """) min_distance = _PlayerProperty('min_distance', doc=""" The distance beyond which the sound volume drops by half, and within which no attenuation is applied. The minimum distance controls how quickly a sound is attenuated as it moves away from the listener. The gain is clamped at the nominal value within the min distance. By default the value is 1.0. The unit defaults to meters, but can be modified with the listener properties. """) max_distance = _PlayerProperty('max_distance', doc=""" The distance at which no further attenuation is applied. When the distance from the listener to the player is greater than this value, attenuation is calculated as if the distance were value. By default the maximum distance is infinity. The unit defaults to meters, but can be modified with the listener properties. """) position = _PlayerProperty('position', doc=""" The position of the sound in 3D space. The position is given as a tuple of floats (x, y, z). The unit defaults to meters, but can be modified with the listener properties. """) pitch = _PlayerProperty('pitch', doc=""" The pitch shift to apply to the sound. The nominal pitch is 1.0. A pitch of 2.0 will sound one octave higher, and play twice as fast. A pitch of 0.5 will sound one octave lower, and play twice as slow. A pitch of 0.0 is not permitted. """) cone_orientation = _PlayerProperty('cone_orientation', doc=""" The direction of the sound in 3D space. The direction is specified as a tuple of floats (x, y, z), and has no unit. The default direction is (0, 0, -1). Directional effects are only noticeable if the other cone properties are changed from their default values. """) cone_inner_angle = _PlayerProperty('cone_inner_angle', doc=""" The interior angle of the inner cone. The angle is given in degrees, and defaults to 360. When the listener is positioned within the volume defined by the inner cone, the sound is played at normal gain (see :attr:`volume`). """) cone_outer_angle = _PlayerProperty('cone_outer_angle', doc=""" The interior angle of the outer cone. The angle is given in degrees, and defaults to 360. When the listener is positioned within the volume defined by the outer cone, but outside the volume defined by the inner cone, the gain applied is a smooth interpolation between :attr:`volume` and :attr:`cone_outer_gain`. """) cone_outer_gain = _PlayerProperty('cone_outer_gain', doc=""" The gain applied outside the cone. When the listener is positioned outside the volume defined by the outer cone, this gain is applied instead of :attr:`volume`. """) # Events def on_player_eos(self): """The player ran out of sources. The playlist is empty. :event: """ if _debug: print('Player.on_player_eos') def on_eos(self): """The current source ran out of data. The default behaviour is to advance to the next source in the playlist if the :attr:`.loop` attribute is set to ``False``. If :attr:`.loop` attribute is set to ``True``, the current source will start to play again until :meth:`next_source` is called or :attr:`.loop` is set to ``False``. :event: """ if _debug: print('Player.on_eos') if bl.logger is not None: bl.logger.log("p.P.oe") bl.logger.close() if self.loop: was_playing = self._playing self.pause() self._timer.reset() if self.source: # Reset source to the beginning self.seek(0.0) if self._audio_player: self._audio_player.clear() self._set_playing(was_playing) else: self.next_source() def on_player_next_source(self): """The player starts to play the next queued source in the playlist. This is a useful event for adjusting the window size to the new source :class:`VideoFormat` for example. :event: """ pass def on_driver_reset(self): """The audio driver has been reset, by default this will kill the current audio player and create a new one, and requeue the buffers. Any buffers that may have been queued in a player will be resubmitted. It will continue from the last buffers submitted, not played and may cause sync issues if using video. :event: """ if self._audio_player: self._audio_player.on_driver_reset() # Voice has been changed, will need to reset all options on the voice. for attr in ('volume', 'min_distance', 'max_distance', 'position', 'pitch', 'cone_orientation', 'cone_inner_angle', 'cone_outer_angle', 'cone_outer_gain'): value = getattr(self, attr) setattr(self, attr, value) if self._playing: self._audio_player.play() Player.register_event_type('on_eos') Player.register_event_type('on_player_eos') Player.register_event_type('on_player_next_source') Player.register_event_type('on_driver_reset') def _one_item_playlist(source): yield source class PlayerGroup: """Group of players that can be played and paused simultaneously. Create a player group for the given list of players. All players in the group must currently not belong to any other group. Args: players (List[Player]): List of :class:`.Player` s in this group. """ def __init__(self, players): """Initialize the PlayerGroup with the players.""" self.players = list(players) def play(self): """Begin playing all players in the group simultaneously.""" audio_players = [p._audio_player for p in self.players if p._audio_player] if audio_players: audio_players[0]._play_group(audio_players) for player in self.players: player.play() def pause(self): """Pause all players in the group simultaneously.""" audio_players = [p._audio_player for p in self.players if p._audio_player] if audio_players: audio_players[0]._stop_group(audio_players) for player in self.players: player.pause()