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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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cef8a55b55
Original commit message from CVS: * gst/extend/jukebox.py: * gst/extend/sources.py: Fixes for thread-safety, changes in behaviour with gst.Pad and cleanup. Still has some issues.
165 lines
5 KiB
Python
165 lines
5 KiB
Python
#!/usr/bin/env python
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# -*- Mode: Python -*-
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# vi:si:et:sw=4:sts=4:ts=4
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#
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# GStreamer python bindings
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# Copyright (C) 2005 Edward Hervey <edward at fluendo dot com>
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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import os
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import sys
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import gobject
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import pygst
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pygst.require('0.10')
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import gst
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from pygobject import gsignal
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EOS = 'EOS'
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ERROR = 'ERROR'
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WRONG_TYPE = 'WRONG_TYPE'
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UNKNOWN_TYPE = 'UNKNOWN_TYPE'
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class AudioSource(gst.Bin):
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"""A bin for audio sources with proper audio converters"""
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gsignal('done', str)
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gsignal('prerolled')
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def __init__(self, filename, caps="audio/x-raw-int,channels=2,rate=44100"):
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# with pygtk 2.4 this call is needed for the gsignal to work
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gst.Bin.__init__(self)
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self.filename = filename
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self.outcaps = caps
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self.filesrc = gst.element_factory_make("filesrc")
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self.filesrc.set_property("location", self.filename)
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self.dbin = gst.element_factory_make("decodebin")
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self.audioconvert = gst.element_factory_make("audioconvert")
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self.audioresample = gst.element_factory_make("audioresample")
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self.volume = gst.element_factory_make("volume")
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self.add(self.filesrc, self.dbin,
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self.audioconvert, self.audioresample, self.volume)
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self.filesrc.link(self.dbin)
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self.audioconvert.link(self.audioresample)
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self.audioresample.link(self.volume, caps)
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self.dbin.connect("new-decoded-pad", self._new_decoded_pad_cb)
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self.dbin.connect("unknown-type", self._unknown_type_cb)
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self._srcpad = None
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def __repr__(self):
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return "<AudioSource for %s>" % self.filename
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def set_volume(self, volume):
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gst.debug("setting volume to %f" % volume)
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self.volume.set_property("volume", volume)
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def _new_decoded_pad_cb(self, dbin, pad, is_last):
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gst.debug("new decoded pad: pad %r [%s]" % (pad, pad.get_caps().to_string()))
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if not "audio" in pad.get_caps().to_string() or self._srcpad:
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return
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gst.debug("linking pad %r to audioconvert" % pad)
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pad.link(self.audioconvert.get_pad("sink"))
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self._srcpad = gst.GhostPad("src", self.volume.get_pad("src"))
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self._srcpad.set_active(True)
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self.add_pad(self._srcpad)
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def _unknown_type_cb(self, pad, caps):
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self.emit('done', UNKNOWN_TYPE)
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def stop(self):
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self.set_state(gst.STATE_NULL)
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def clean(self):
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self.stop()
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self.remove(self.filesrc)
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self.remove(self.dbin)
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self.remove(self.audioconvert)
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self.remove(self.audioresample)
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self.remove(self.volume)
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self.filesrc = None
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self.dbin = None
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self.audioconvert = None
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self.volume = None
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gobject.type_register(AudioSource)
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# run us to test
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if __name__ == "__main__":
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main = gobject.MainLoop()
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def _done_cb(source, reason):
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print "Done"
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sys.stdout.flush()
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if reason != EOS:
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print "Some error happened: %s" % reason
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main.quit()
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def _error_cb(source, element, gerror, message):
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print "Error: %s" % gerror
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main.quit()
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try:
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source = AudioSource(sys.argv[1])
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except IndexError:
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sys.stderr.write("Please give a filename to play\n")
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sys.exit(1)
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pipeline = gst.Pipeline("playing")
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# connecting on the source also catches eos emit when
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# no audio pad
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source.connect('done', _done_cb)
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pipeline.connect('error', _error_cb)
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p = "osssink"
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if len(sys.argv) > 2:
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p = " ".join(sys.argv[2:])
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pipeline.add(source)
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sink = gst.parse_launch(p)
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pipeline.add(sink)
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source.link(sink)
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# we schedule this as a timeout so that we are definately in the main
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# loop when it goes to PLAYING, and errors make main.quit() work correctly
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def _start(pipeline):
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print "setting pipeline to PLAYING"
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pipeline.set_state(gst.STATE_PLAYING)
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print "set pipeline to PLAYING"
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gobject.timeout_add(0, _start, pipeline)
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gobject.idle_add(pipeline.iterate)
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print "Going into main loop"
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main.run()
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print "Left main loop"
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pipeline.set_state(gst.STATE_NULL)
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pipeline.remove(source)
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pipeline.remove(sink)
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utils.gc_collect('cleaned out pipeline')
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source.clean()
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utils.gc_collect('cleaned up source')
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source = None
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utils.gc_collect('set source to None')
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