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1 # -*- Mode: Python -*- 2 # vi:si:et:sw=4:sts=4:ts=4 3 # 4 # Flumotion - a streaming media server 5 # Copyright (C) 2004,2005,2006,2007 Fluendo, S.L. (www.fluendo.com). 6 # All rights reserved. 7 8 # This file may be distributed and/or modified under the terms of 9 # the GNU General Public License version 2 as published by 10 # the Free Software Foundation. 11 # This file is distributed without any warranty; without even the implied 12 # warranty of merchantability or fitness for a particular purpose. 13 # See "LICENSE.GPL" in the source distribution for more information. 14 15 # Licensees having purchased or holding a valid Flumotion Advanced 16 # Streaming Server license may use this file in accordance with the 17 # Flumotion Advanced Streaming Server Commercial License Agreement. 18 # See "LICENSE.Flumotion" in the source distribution for more information. 19 20 # Headers in this file shall remain intact. 21 22 23 import gst 24 25 from flumotion.component import feedcomponent 26 from vorbisutils import get_max_sample_rate, get_preferred_sample_rate 2729 checkTimestamp = True 30 checkOffset = True 319133 self.debug('running Vorbis check') 34 from flumotion.worker.checks import encoder 35 d = encoder.checkVorbis() 36 37 d.addCallback(self._checkCallback) 38 39 return d40 4446 self.bitrate = properties.get('bitrate', -1) 47 self.quality = properties.get('quality', 0.3) 48 self.channels = properties.get('channels', 2) 49 50 return ('audioresample name=ar ! audioconvert ! capsfilter name=cf ' 51 '! vorbisenc name=enc')5254 enc = pipeline.get_by_name('enc') 55 cf = pipeline.get_by_name('cf') 56 ar = pipeline.get_by_name('ar') 57 58 assert enc and cf and ar 59 60 if self.bitrate > -1: 61 enc.set_property('bitrate', self.bitrate) 62 else: 63 enc.set_property('quality', self.quality) 64 65 pad = ar.get_pad('sink') 66 handle = None 67 68 def buffer_probe(pad, buffer): 69 # this comes from another thread 70 caps = buffer.get_caps() 71 in_rate = caps[0]['rate'] 72 73 # now do necessary filtercaps 74 rate = in_rate 75 if self.bitrate > -1: 76 maxsamplerate = get_max_sample_rate(self.bitrate, self.channels) 77 if in_rate > maxsamplerate: 78 rate = get_preferred_sample_rate(maxsamplerate) 79 self.debug( 80 'rate %d > max rate %d (for %d kbit/sec), selecting rate %d instead' % ( 81 in_rate, maxsamplerate, self.bitrate, rate)) 82 83 caps_str = 'audio/x-raw-float, rate=%d, channels=%d' % (rate, 84 self.channels) 85 cf.set_property('caps', 86 gst.caps_from_string(caps_str)) 87 pad.remove_buffer_probe(handle) 88 return True89 90 handle = pad.add_buffer_probe(buffer_probe)
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