Source Code for Module timeside.encoder.flac

 1  # -*- coding: utf-8 -*- 
 2  # 
 3  # Copyright (c) 2007-2009 Guillaume Pellerin <yomguy@parisson.com> 
 4   
 5  # This file is part of TimeSide. 
 6   
 7  # TimeSide is free software: you can redistribute it and/or modify 
 8  # it under the terms of the GNU General Public License as published by 
 9  # the Free Software Foundation, either version 2 of the License, or 
10  # (at your option) any later version. 
11   
12  # TimeSide is distributed in the hope that it will be useful, 
13  # but WITHOUT ANY WARRANTY; without even the implied warranty of 
14  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
15  # GNU General Public License for more details. 
16   
17  # You should have received a copy of the GNU General Public License 
18  # along with TimeSide.  If not, see <http://www.gnu.org/licenses/>. 
19   
20  # Author: Guillaume Pellerin <yomguy@parisson.com> 
21   
22  from timeside.core import Processor, implements, interfacedoc 
23  from timeside.encoder.core import GstEncoder 
24  from timeside.api import IEncoder 
25  from timeside.tools import * 
26   
27   
28 -class FlacEncoder(GstEncoder): 
29      """ gstreamer-based FLAC encoder """ 
30      implements(IEncoder) 
31   
32      @interfacedoc 
33 -    def setup(self, channels=None, samplerate=None, blocksize=None, totalframes=None): 
34          super(FlacEncoder, self).setup(channels, samplerate, blocksize, totalframes) 
35   
36          self.pipe = ''' appsrc name=src ! audioconvert 
37                          ! flacenc ''' 
38   
39          if self.filename and self.streaming: 
40              self.pipe += ''' ! tee name=t 
41              ! queue ! filesink location=%s 
42              t. ! queue ! appsink name=app sync=False 
43              ''' % self.filename 
44   
45          elif self.filename : 
46              self.pipe += '! filesink location=%s async=False sync=False ' % self.filename 
47          else: 
48              self.pipe += '! queue ! appsink name=app sync=False ' 
49   
50          self.start_pipeline(channels, samplerate) 
51   
52   
53      @staticmethod 
54      @interfacedoc 
55 -    def id(): 
56          return "gst_flac_enc" 
57   
58      @staticmethod 
59      @interfacedoc 
60 -    def description(): 
61          return "FLAC GStreamer based encoder" 
62   
63      @staticmethod 
64      @interfacedoc 
65 -    def format(): 
66          return "FLAC" 
67   
68      @staticmethod 
69      @interfacedoc 
70 -    def file_extension(): 
71          return "flac" 
72   
73      @staticmethod 
74      @interfacedoc 
75 -    def mime_type(): 
76          return 'audio/x-flac' 
77   
78      @interfacedoc 
79 -    def set_metadata(self, metadata): 
80          self.metadata = metadata 
81