/usr/share/pyshared/quodlibet/player/gstbe.py is in exfalso 2.3.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation
import gobject
import os
import pygst
pygst.require("0.10")
import gst
if gst.pygst_version >= (0, 10, 10):
import gst.pbutils
from quodlibet import config
from quodlibet import const
from quodlibet.util import fver
from quodlibet.player import error as PlayerError
from quodlibet.player._base import BasePlayer
from quodlibet.qltk.msg import ErrorMessage
def GStreamerSink(pipeline):
"""Try to create a GStreamer pipeline:
* Try making the pipeline (defaulting to gconfaudiosink or
autoaudiosink on Windows).
* If it fails, fall back to autoaudiosink.
* If that fails, return None
Returns the pipeline's description and a list of disconnected elements."""
if not pipeline and not gst.element_factory_find('gconfaudiosink'):
pipeline = "autoaudiosink"
elif not pipeline or pipeline == "gconf":
pipeline = "gconfaudiosink profile=music"
try: pipe = [gst.parse_launch(element) for element in pipeline.split('!')]
except gobject.GError, err:
print_w(_("Invalid GStreamer output pipeline, trying default."))
try: pipe = [gst.parse_launch("autoaudiosink")]
except gobject.GError: pipe = None
else: pipeline = "autoaudiosink"
if pipe:
# In case the last element is linkable with a fakesink
# it is not an audiosink, so we append the default pipeline
fake = gst.element_factory_make('fakesink')
try:
gst.element_link_many(pipe[-1], fake)
except gst.LinkError: pass
else:
gst.element_unlink_many(pipe[-1], fake)
default, default_text = GStreamerSink("")
if default:
return pipe + default, pipeline + " ! " + default_text
else:
print_w(_("Could not create default GStreamer pipeline."))
return pipe, pipeline
class GStreamerPlayer(BasePlayer):
__gproperties__ = BasePlayer._gproperties_
__gsignals__ = BasePlayer._gsignals_
def __init__(self, librarian=None):
super(GStreamerPlayer, self).__init__()
self.version_info = "GStreamer: %s / PyGSt: %s" % (
fver(gst.version()), fver(gst.pygst_version))
self.librarian = librarian
self.name = ''
self.bin = None
self.connect('destroy', lambda s: self.__destroy_pipeline())
self._in_gapless_transition = False
self.paused = True
self._inhibit_play = False
def __init_pipeline(self):
if self.bin: return True
pipeline = config.get("player", "gst_pipeline")
pipeline, self.name = GStreamerSink(pipeline)
if gst.version() >= (0, 10, 24):
# The output buffer is necessary to run the song-ended and
# song-started events through QL's signal handlers before the
# playbin2 hits EOF inside a gapless transition.
bufbin = gst.Bin()
queue = gst.element_factory_make('queue')
queue.set_property('max-size-time', 500 * gst.MSECOND)
self._vol_element = vol = gst.element_factory_make('volume')
pipeline = [queue, vol] + pipeline
if gst.element_factory_find('equalizer-10bands'):
# The equalizer only operates on 16-bit ints or floats, and
# will only pass these types through even when inactive.
# We push floats through to this point, then let the second
# audioconvert handle pushing to whatever the rest of the
# pipeline supports. As a bonus, this seems to automatically
# select the highest-precision format supported by the
# rest of the chain.
filt = gst.element_factory_make('capsfilter')
filt.set_property('caps',
gst.caps_from_string('audio/x-raw-float'))
eq = gst.element_factory_make('equalizer-10bands')
self._eq_element = eq
self.update_eq_values()
conv = gst.element_factory_make('audioconvert')
pipeline[:2] += [filt, eq, conv]
for idx, elem in enumerate(pipeline):
bufbin.add(elem)
if idx > 0:
pipeline[idx-1].link(elem)
# Test to ensure output pipeline can preroll
bufbin.set_state(gst.STATE_READY)
result, state, oldstate = bufbin.get_state()
bufbin.set_state(gst.STATE_NULL)
if result == gst.STATE_CHANGE_FAILURE: return False
gpad = gst.GhostPad('sink', queue.get_pad('sink'))
bufbin.add_pad(gpad)
self.bin = gst.element_factory_make('playbin2')
id = self.bin.connect('about-to-finish', self.__about_to_finish)
self.__atf_id = id
self.bin.set_property('audio-sink', bufbin)
else:
self.bin = gst.element_factory_make('playbin')
self.bin.set_property('audio-sink', pipeline[-1])
self._vol_element = self.bin
self.__atf_id = None
self.bin.set_property('video-sink', None)
# ReplayGain information gets lost when destroying
self.volume = self.volume
bus = self.bin.get_bus()
bus.add_signal_watch()
self.__bus_id = bus.connect('message', self.__message, self.librarian)
if gst.pygst_version >= (0, 10, 10):
self.__elem_id = bus.connect('message::element',
self.__message_elem)
return True
def __destroy_pipeline(self):
self._inhibit_play = False
if self.bin is None: return
self.bin.set_state(gst.STATE_NULL)
bus = self.bin.get_bus()
bus.disconnect(self.__bus_id)
if gst.pygst_version >= (0, 10, 10):
bus.disconnect(self.__elem_id)
bus.remove_signal_watch()
if self.__atf_id is not None:
self.bin.disconnect(self.__atf_id)
del self.bin
del self._vol_element
self.bin = None
return True
def __message(self, bus, message, librarian):
if message.type == gst.MESSAGE_EOS:
if not self._in_gapless_transition:
self._source.next_ended()
self._end(False)
elif message.type == gst.MESSAGE_TAG:
self.__tag(message.parse_tag(), librarian)
elif message.type == gst.MESSAGE_ERROR:
err, debug = message.parse_error()
err = str(err).decode(const.ENCODING, 'replace')
self.error(err, True)
elif message.type == gst.MESSAGE_BUFFERING:
percent = message.parse_buffering()
self._set_inhibit_play(percent < 100)
return True
def __message_elem(self, bus, message):
if not message.structure.get_name().startswith('missing-'):
return True
d = gst.pbutils.missing_plugin_message_get_installer_detail(message)
ctx = gst.pbutils.InstallPluginsContext()
gobject.idle_add(self.stop)
gst.pbutils.install_plugins_async([d], ctx, self.__message_elem_cb)
return True
def __message_elem_cb(self, result):
gst.update_registry()
def __about_to_finish(self, pipeline):
self._in_gapless_transition = True
self._source.next_ended()
if self._source.current:
self.bin.set_property('uri', self._source.current("~uri"))
gobject.timeout_add(0, self._end, False, True,
priority = gobject.PRIORITY_HIGH)
def stop(self):
# On GStreamer, we can release the device when stopped.
if not self.paused:
self._paused = True
if self.song:
self.emit('paused')
self.__destroy_pipeline()
def do_set_property(self, property, v):
if property.name == 'volume':
if self._in_gapless_transition:
return
self._volume = v
if self.song and config.getboolean("player", "replaygain"):
profiles = filter(None, self.replaygain_profiles)[0]
fb_gain = config.getfloat("player", "fallback_gain")
pa_gain = config.getfloat("player", "pre_amp_gain")
scale = self.song.replay_gain(profiles, pa_gain, fb_gain)
v = max(0.0, v * scale)
if self.bin:
self._vol_element.set_property('volume', v)
else:
raise AttributeError
def get_position(self):
"""Return the current playback position in milliseconds,
or 0 if no song is playing."""
if self.song and self.bin:
try: p = self.bin.query_position(gst.FORMAT_TIME)[0]
except gst.QueryError: p = 0
p //= gst.MSECOND
return p
else:
return 0
def _set_inhibit_play(self, inhibit):
"""Set the inhibit play flag. If set, this will pause the pipeline
without giving the appearance of being paused to the outside. This
is for internal uses of pausing, such as for waiting while the buffer
is being filled for network streams."""
if inhibit == self._inhibit_play:
return
self._inhibit_play = inhibit
if inhibit:
self.bin.set_state(gst.STATE_PAUSED)
elif not self.paused:
self.bin.set_state(gst.STATE_PLAYING)
def _set_paused(self, paused):
if paused != self._paused:
self._paused = paused
if self.song:
if not self.bin:
if self.__init_pipeline():
self.bin.set_property('uri', self.song("~uri"))
else:
# Backend error; show message and halt playback
ErrorMessage(None, _("Output Error"),
_("GStreamer output pipeline could not be "
"initialized. The pipeline might be invalid, "
"or the device may be in use. Check the "
"player preferences.")).run()
self._paused = paused = True
self.emit((paused and 'paused') or 'unpaused')
if self.bin:
if not self._paused:
if not self._inhibit_play:
self.bin.set_state(gst.STATE_PLAYING)
elif self.song.is_file or self.info.get('~#length'):
self.bin.set_state(gst.STATE_PAUSED)
else:
self.__destroy_pipeline()
elif paused is True:
# Something wants us to pause between songs, or when
# we've got no song playing (probably StopAfterMenu).
self.emit('paused')
self.__destroy_pipeline()
def _get_paused(self): return self._paused
paused = property(_get_paused, _set_paused)
def error(self, message, lock):
print_w(message)
self.emit('error', self.song, message, lock)
if not self.paused:
self.next()
def seek(self, pos):
"""Seek to a position in the song, in milliseconds."""
if self.bin is not None and self.song is not None:
# ensure any pending state changes have completed
self.bin.get_state()
pos = max(0, int(pos))
if pos >= self._length:
self.paused = True
pos = self._length
gst_time = pos * gst.MSECOND
event = gst.event_new_seek(
1.0, gst.FORMAT_TIME, gst.SEEK_FLAG_FLUSH,
gst.SEEK_TYPE_SET, gst_time, gst.SEEK_TYPE_NONE, 0)
if self.bin.send_event(event):
self.emit('seek', self.song, pos)
def _end(self, stopped, gapless = False):
# We need to set self.song to None before calling our signal
# handlers. Otherwise, if they try to end the song they're given
# (e.g. by removing it), then we get in an infinite loop.
song = self.song
self.song = self.info = None
self.emit('song-ended', song, stopped)
# Then, set up the next song.
self._in_gapless_transition = False
self.song = self.info = self._source.current
self.emit('song-started', self.song)
if self.song is not None:
self._length = self.info.get("~#length", 0) * 1000
if not gapless:
# Due to extensive problems with playbin2, we destroy the
# entire pipeline and recreate it each time we're not in
# a gapless transition.
self.__destroy_pipeline()
if self.__init_pipeline():
self.bin.set_property('uri', self.song("~uri"))
self.volume = self.volume
else: self.paused = True
if self.bin:
if self._paused:
self.bin.set_state(gst.STATE_PAUSED)
else:
self.bin.set_state(gst.STATE_PLAYING)
else:
self.__destroy_pipeline()
self.paused = True
def __tag(self, tags, librarian):
if self.song and self.song.multisong:
self._fill_stream(tags, librarian)
elif self.song and self.song.fill_metadata:
pass
def _fill_stream(self, tags, librarian):
changed = False
started = False
if self.info is self.song:
self.info = type(self.song)(self.song["~filename"])
self.info.multisong = False
for k in tags.keys():
value = str(tags[k]).strip()
if not value: continue
if k == "bitrate":
try: bitrate = int(value) / 1000
except (ValueError, TypeError): pass
else:
if bitrate != self.song.get("~#bitrate"):
changed = True
self.song["~#bitrate"] = bitrate
self.info["~#bitrate"] = bitrate
elif k == "duration":
try: length = int(long(value) / gst.SECOND)
except (ValueError, TypeError): pass
else:
if length != self.song.get("~#length"):
changed = True
self.info["~#length"] = length
elif k in ["emphasis", "mode", "layer"]:
continue
elif isinstance(value, basestring):
value = unicode(value, errors='replace')
k = {"track-number": "tracknumber",
"location": "website"}.get(k, k)
if self.info.get(k) == value:
continue
elif k == "title":
self.info[k] = value
started = True
else:
self.song[k] = self.info[k] = value
changed = True
if started:
self.emit('song-started', self.info)
elif changed and librarian is not None:
librarian.changed([self.song])
@property
def eq_bands(self):
if gst.element_factory_find('equalizer-10bands'):
return [29, 59, 119, 237, 474, 947, 1889, 3770, 7523, 15011]
else:
return []
def update_eq_values(self):
if hasattr(self, '_eq_element'):
for band, val in enumerate(self._eq_values):
self._eq_element.set_property('band%d' % band, val)
def can_play_uri(uri):
return gst.element_make_from_uri(gst.URI_SRC, uri, '') is not None
def init(librarian):
gst.debug_set_default_threshold(gst.LEVEL_ERROR)
if gst.element_make_from_uri(
gst.URI_SRC,
"file:///fake/path/for/gst", ""):
return GStreamerPlayer(librarian)
else:
raise PlayerError(
_("Unable to open input files"),
_("GStreamer has no element to handle reading files. Check "
"your GStreamer installation settings."))
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