def __init__(self,conf,directory):
""" Create the audiobook playing abstraction.
Arguments:
conf A configuration object like that from the result of the
parser in pstorytime.coreparser.
directory Directory of the audiobook to play.
"""
gobject.GObject.__init__(self)
self._lock = threading.RLock()
with self._lock:
self._playing = False
self.notify("playing")
self._conf = conf
self._directory = normcase(expanduser(directory))
self._player = pstorytime.player.Player(self,self._directory)
self._player.connect("notify::eos",self._on_eos)
self._log = Log(self,
self._player,
self._directory,
self._conf)
self._log.connect("notify::playlog",self._on_playlog)
self._filename = None
self._eob = False
# Try to load last entry from play log.
if len(self._log.playlog)>0:
start_file = self._log.playlog[-1].filename
start_pos = self._log.playlog[-1].position
self._play(start_file, start_pos, log=False, seek=True)
else:
# Otherwise use first file in directory.
dirlist = self.list_files()
if len(dirlist)>0:
start_file = dirlist[0]
self._play(start_file, log=False, seek=True)
else:
# Nothing to play!
self.emit("error","No valid files in audiobook directory.")
class AudioBook(gobject.GObject):
"""Audiobook-playing abstraction for gstreamer.
The same callback system as in gstreamer (and also GTK) is used. Read up on
python gobject (or GTK if appropriate) bindings if unsure on how to use them.
Signals:
error Contains error messages as strings.
position Contains no additional information, but signals that it
is appropriate to update position information. This is
done when playing, pausing and seeking (also when
paused.)
notify::eob eob property updated.
notify::filename filename property updated.
notify::playing playing property updated.
notify::playlog playlog property updated.
"""
SECOND = pstorytime.player.Player.SECOND
"""Time unit of a second according to gstreamer.
"""
__gsignals__ = {
'error' : ( gobject.SIGNAL_RUN_LAST,
gobject.TYPE_NONE,
(gobject.TYPE_STRING,)),
'position' : (gobject.SIGNAL_RUN_LAST,
gobject.TYPE_NONE,
tuple())
}
core_extensions = ["m4b"]
"""Extensions to treat as audio files in addition to those registered as such in the system mime type database."""
@withdoc(gobject.property)
def playing(self):
"""True if the audiobook is playing. """
with self._lock:
return self._playing
@withdoc(gobject.property)
def eob(self):
"""True if the audiobook player is currently at the end of the book. """
with self._lock:
return self._eob
@withdoc(gobject.property)
def filename(self):
"""The currently loaded filename. """
with self._lock:
return self._filename
@withdoc(gobject.property)
def playlog(self):
"""The current playlog containing walltime, event type, filename and
position. """
with self._lock:
return self._log.playlog
def __init__(self,conf,directory):
""" Create the audiobook playing abstraction.
Arguments:
conf A configuration object like that from the result of the
parser in pstorytime.coreparser.
directory Directory of the audiobook to play.
"""
gobject.GObject.__init__(self)
self._lock = threading.RLock()
with self._lock:
self._playing = False
self.notify("playing")
self._conf = conf
self._directory = normcase(expanduser(directory))
self._player = pstorytime.player.Player(self,self._directory)
self._player.connect("notify::eos",self._on_eos)
self._log = Log(self,
self._player,
self._directory,
self._conf)
self._log.connect("notify::playlog",self._on_playlog)
self._filename = None
self._eob = False
# Try to load last entry from play log.
if len(self._log.playlog)>0:
start_file = self._log.playlog[-1].filename
start_pos = self._log.playlog[-1].position
self._play(start_file, start_pos, log=False, seek=True)
else:
# Otherwise use first file in directory.
dirlist = self.list_files()
if len(dirlist)>0:
start_file = dirlist[0]
self._play(start_file, log=False, seek=True)
else:
# Nothing to play!
self.emit("error","No valid files in audiobook directory.")
def _on_playlog(self,log,property):
"""The playlog was updated.
Arguments:
log The logger object.
property The property object that was updated.
"""
with self._lock:
self.notify("playlog")
def _on_eos(self,player,property):
"""Gstreamer reached the end of a file.
Arguments:
player The player that reached the end of a stream.
property The property that was updated.
"""
with self._lock:
if player.eos:
# The player reported an end of stream, go to next file.
next_file = self.get_file(1)
if next_file != None:
self._play(next_file)
else:
# No next file, we are at the end of the book.
self._eob = True
self.notify("eob")
self._playing = False
self.notify("playing")
self.emit("position")
self._log.lognow("eob")
self._log.stop()
def mark(self, name):
"""Manually add an event in the playlog.
Arguments:
name Name of the event.
"""
with self._lock:
self._log.lognow(name)
def _play(self, start_file=None, start_pos=None, pos_relative_end=False, log=False, seek=False):
"""Internal general play abstraction.
Arguments:
start_file The file to start playing at, use None to use the
current file. (Optional, defaults to None.)
start_pos The position to start playing at in ns, use None to use
the current position. (Or beginning of file if
start_file was given.) (Optional, defaults to None.)
pos_relative_end True if the length of the track should be added to
start_pos. (Optional, defaults to False.)
log True if this should be logged as an event. (Optional,
defaults to False.)
seek True if this is a seeking operation. (Optional,
defaults to False.)
Returns: True if successfull.
"""
with self._lock:
self._eob = False
self.notify("eob")
# Is this a seek while the player is paused?
paused_seek = seek and (not self._playing)
# Make sure we are not playing anything.
self._pause(log=log, seek=seek)
if start_file != None and start_file != self._filename:
# Try to load new file.
self._filename = start_file
self.notify("filename")
if not self._player.load(start_file):
# Failed to load file.
self._log.lognow("loadfail")
self._log.stop()
self._playing = False
self.notify("playing")
return False
if start_pos != None:
duration = self.duration()
if pos_relative_end:
start_pos += duration
if start_pos < 0:
# Position in an earlier file.
prev_file = self.get_file(-1)
if prev_file == None:
# Already in first book!
start_pos = 0
pos_relative_end = False
self._player.seek(start_pos)
else:
self._play(prev_file, start_pos, pos_relative_end=True, seek=True)
elif start_pos < duration:
# Position in this file.
self._player.seek(start_pos)
else:
# Position in a later file.
next_file = self.get_file(1)
if next_file == None:
# Already in last book!
self._player.seek(duration)
else:
self._play(next_file, start_pos-duration, seek=True)
if log:
if seek:
self._log.lognow("seekto")
else:
self._log.lognow("start")
if not paused_seek:
self._log.start()
if not paused_seek:
self._playing = True
self._player.play()
self.notify("playing")
self.emit("position")
return True
def _pause(self, log=False, seek=False):
"""Internal general pause abstraction.
Arguments:
log True if this should be logged as an event.
seek True if this is part of a seek operation.
"""
with self._lock:
if self._playing:
self._playing = False
self.notify("playing")
self._player.pause()
if log:
if seek:
self._log.lognow("seekfrom")
else:
self._log.lognow("stop")
self._log.stop()
self.emit("position")
def play(self, start_file=None, start_pos=None):
"""Start playing the audiobook at current location, unless given another
location.
Arguments:
start_file The file to start playing at, use None to use the current
file. (Optional, defaults to None.)
start_pos The position to start playing at in ns, use None to use the
current position. (Or beginning of file if start_file was
given.) (Optional, defaults to None.)
"""
with self._lock:
# Only propagate if we are not playing, or we have given a position to
# start playing at.
if (not self._playing) or start_file != None or start_pos != None:
return self._play(start_file, start_pos, log=True)
def seek(self, start_file=None, start_pos=None):
"""Seek to the given position, otherwise works the same as play.
Arguments:
start_file The file to seek to, use None to indicate the current file.
(Optional, defaults to None.)
start_pos The position to seek to in ns, use None to indicatethe
current position. (Or beginning of file if start_file was
given.) (Optional, defaults to None.)
"""
with self._lock:
if start_file!=None or start_pos!=None:
return self._play(start_file, start_pos, log=True, seek=True)
def dseek(self, delta):
"""Seek relative to the current position.
Arguments:
delta Positive or negative distance to seek in ns.
"""
with self._lock:
(filename,pos,_) = self.position()
return self._play(filename, pos+delta, log=True, seek=True)
def pause(self):
"""Pause audiobook now. """
with self._lock:
if self._playing:
self._pause(log=True)
backtrack = self._conf.backtrack
if backtrack!=None and backtrack>0:
self.dseek(-backtrack*self.SECOND)
def play_pause(self):
"""Toggle play/pause. """
with self._lock:
if self._playing:
self.pause()
else:
self.play()
def position(self):
"""Get current filename, position and duration (in ns) as a tuple.
Returns: (filename,position,duration)
"""
with self._lock:
return self._player.position()
def duration(self):
"""Get the duration of the current file.
Returns: Duration in ns.
"""
with self._lock:
return self._player.duration()
def list_files(self):
"""List all audio files in audiobook directory.
Returns: List of filenames as strings.
"""
with self._lock:
entries = os.listdir(self._directory)
entries.sort()
return filter(self._is_audio_file, entries)
def _is_audio_file(self,filename):
"""Internal function to check if a file is to be considered an audiobook.
Returns: True if so.
"""
with self._lock:
if not isfile(join(self._directory,filename)):
return False
# Check if the filename ends with any of the given extensions.
exts = AudioBook.core_extensions + self._conf.extensions
exts = tuple(map(lambda e: '.'+e, exts))
if filename.endswith(exts):
return True
# Check if the mimetype database indicates sais the extension
# corresponds to an audio file.
(mime, _) = mimetypes.guess_type(filename)
if mime != None:
data = mime.split("/",1)
return len(data)==2 and data[0] == "audio"
else:
return False
def get_file(self,delta):
"""Get a file relative to the current one.
Argements:
delta Adds this number to the position of the current file in the
audiobook directory, to get the new file.
Returns: New filename.
"""
try:
files = self.list_files()
i = files.index(self._filename)
if 0 <= i+delta < len(files):
return files[i+delta]
else:
return None
except ValueError:
return None
def gst(self):
"""Get the gstreamer playbin2 object.
Please do not touch play/pause/seek functionality, or it will seriously
mess things up. Though feel free to adjust volume/playback speed etc.
Returns: Gstreamer playbin2 object.
"""
return self._player.gst
def quit(self):
"""Shut down the audiobook player.
"""
with self._lock:
self.pause()
self._player.quit()
