mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-03 06:56:46 +00:00
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
|
|
# -*- Mode: Python -*-
|
|
# vi:si:et:sw=4:sts=4:ts=4
|
|
#
|
|
# GStreamer python bindings
|
|
# Copyright (C) 2005 Edward Hervey <edward at fluendo dot com>
|
|
|
|
# This library is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU Lesser General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2.1 of the License, or (at your option) any later version.
|
|
#
|
|
# This library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with this library; if not, write to the Free Software
|
|
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
import os
|
|
import sys
|
|
|
|
import gobject
|
|
import pygst
|
|
pygst.require('0.10')
|
|
import gst
|
|
|
|
from pygobject import gsignal
|
|
|
|
EOS = 'EOS'
|
|
ERROR = 'ERROR'
|
|
WRONG_TYPE = 'WRONG_TYPE'
|
|
UNKNOWN_TYPE = 'UNKNOWN_TYPE'
|
|
|
|
class AudioSource(gst.Bin):
|
|
"""A bin for audio sources with proper audio converters"""
|
|
|
|
gsignal('done', str)
|
|
gsignal('prerolled')
|
|
|
|
def __init__(self, filename, caps="audio/x-raw-int,channels=2,rate=44100"):
|
|
# with pygtk 2.4 this call is needed for the gsignal to work
|
|
gst.Bin.__init__(self)
|
|
|
|
self.filename = filename
|
|
self.outcaps = caps
|
|
|
|
self.filesrc = gst.element_factory_make("filesrc")
|
|
self.filesrc.set_property("location", self.filename)
|
|
self.dbin = gst.element_factory_make("decodebin")
|
|
self.audioconvert = gst.element_factory_make("audioconvert")
|
|
self.audioresample = gst.element_factory_make("audioresample")
|
|
self.volume = gst.element_factory_make("volume")
|
|
|
|
self.add(self.filesrc, self.dbin,
|
|
self.audioconvert, self.audioresample, self.volume)
|
|
self.filesrc.link(self.dbin)
|
|
self.audioconvert.link(self.audioresample)
|
|
self.audioresample.link(self.volume, caps)
|
|
|
|
self.dbin.connect("new-decoded-pad", self._new_decoded_pad_cb)
|
|
self.dbin.connect("unknown-type", self._unknown_type_cb)
|
|
|
|
self._srcpad = None
|
|
|
|
def __repr__(self):
|
|
return "<AudioSource for %s>" % self.filename
|
|
|
|
def set_volume(self, volume):
|
|
gst.debug("setting volume to %f" % volume)
|
|
self.volume.set_property("volume", volume)
|
|
|
|
def _new_decoded_pad_cb(self, dbin, pad, is_last):
|
|
gst.debug("new decoded pad: pad %r [%s]" % (pad, pad.get_caps().to_string()))
|
|
if not "audio" in pad.get_caps().to_string() or self._srcpad:
|
|
return
|
|
|
|
gst.debug("linking pad %r to audioconvert" % pad)
|
|
pad.link(self.audioconvert.get_pad("sink"))
|
|
|
|
self._srcpad = gst.GhostPad("src", self.volume.get_pad("src"))
|
|
self._srcpad.set_active(True)
|
|
self.add_pad(self._srcpad)
|
|
|
|
def _unknown_type_cb(self, pad, caps):
|
|
self.emit('done', UNKNOWN_TYPE)
|
|
|
|
def stop(self):
|
|
self.set_state(gst.STATE_NULL)
|
|
|
|
def clean(self):
|
|
self.stop()
|
|
self.remove(self.filesrc)
|
|
self.remove(self.dbin)
|
|
self.remove(self.audioconvert)
|
|
self.remove(self.audioresample)
|
|
self.remove(self.volume)
|
|
self.filesrc = None
|
|
self.dbin = None
|
|
self.audioconvert = None
|
|
self.volume = None
|
|
|
|
gobject.type_register(AudioSource)
|
|
|
|
|
|
# run us to test
|
|
if __name__ == "__main__":
|
|
main = gobject.MainLoop()
|
|
|
|
def _done_cb(source, reason):
|
|
print "Done"
|
|
sys.stdout.flush()
|
|
if reason != EOS:
|
|
print "Some error happened: %s" % reason
|
|
main.quit()
|
|
|
|
def _error_cb(source, element, gerror, message):
|
|
print "Error: %s" % gerror
|
|
main.quit()
|
|
|
|
try:
|
|
source = AudioSource(sys.argv[1])
|
|
except IndexError:
|
|
sys.stderr.write("Please give a filename to play\n")
|
|
sys.exit(1)
|
|
|
|
pipeline = gst.Pipeline("playing")
|
|
# connecting on the source also catches eos emit when
|
|
# no audio pad
|
|
source.connect('done', _done_cb)
|
|
pipeline.connect('error', _error_cb)
|
|
|
|
p = "osssink"
|
|
if len(sys.argv) > 2:
|
|
p = " ".join(sys.argv[2:])
|
|
|
|
pipeline.add(source)
|
|
sink = gst.parse_launch(p)
|
|
pipeline.add(sink)
|
|
source.link(sink)
|
|
|
|
# we schedule this as a timeout so that we are definately in the main
|
|
# loop when it goes to PLAYING, and errors make main.quit() work correctly
|
|
def _start(pipeline):
|
|
print "setting pipeline to PLAYING"
|
|
pipeline.set_state(gst.STATE_PLAYING)
|
|
print "set pipeline to PLAYING"
|
|
|
|
gobject.timeout_add(0, _start, pipeline)
|
|
gobject.idle_add(pipeline.iterate)
|
|
|
|
print "Going into main loop"
|
|
main.run()
|
|
print "Left main loop"
|
|
|
|
pipeline.set_state(gst.STATE_NULL)
|
|
pipeline.remove(source)
|
|
pipeline.remove(sink)
|
|
utils.gc_collect('cleaned out pipeline')
|
|
source.clean()
|
|
utils.gc_collect('cleaned up source')
|
|
source = None
|
|
utils.gc_collect('set source to None')
|