Source Code for Module timeside.encoder.wav

 1  # -*- coding: utf-8 -*- 
 2  # 
 3  # Copyright (c) 2007-2010 Parisson 
 4  # Copyright (c) 2010 Paul Brossier <piem@piem.org> 
 5  # 
 6  # This file is part of TimeSide. 
 7   
 8  # TimeSide is free software: you can redistribute it and/or modify 
 9  # it under the terms of the GNU General Public License as published by 
10  # the Free Software Foundation, either version 2 of the License, or 
11  # (at your option) any later version. 
12   
13  # TimeSide is distributed in the hope that it will be useful, 
14  # but WITHOUT ANY WARRANTY; without even the implied warranty of 
15  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
16  # GNU General Public License for more details. 
17   
18  # You should have received a copy of the GNU General Public License 
19  # along with TimeSide.  If not, see <http://www.gnu.org/licenses/>. 
20   
21  # Author: Paul Brossier <piem@piem.org> 
22   
23  from timeside.core import Processor, implements, interfacedoc 
24  from timeside.encoder.core import GstEncoder 
25  from timeside.api import IEncoder 
26  from timeside.tools import * 
27   
28   
29 -class WavEncoder(GstEncoder): 
30      """ gstreamer-based encoder """ 
31      implements(IEncoder) 
32   
33      @interfacedoc 
34 -    def setup(self, channels=None, samplerate=None, blocksize=None, totalframes=None): 
35          super(WavEncoder, self).setup(channels, samplerate, blocksize, totalframes) 
36   
37          self.pipe = ''' appsrc name=src 
38                    ! audioconvert 
39                    ! wavenc 
40                    ''' 
41          if self.filename and self.streaming: 
42              self.pipe += ''' ! tee name=t 
43              ! queue ! filesink location=%s 
44              t. ! queue ! appsink name=app sync=False 
45              ''' % self.filename 
46   
47          elif self.filename : 
48              self.pipe += '! filesink location=%s async=False sync=False ' % self.filename 
49          else: 
50              self.pipe += '! queue ! appsink name=app sync=False ' 
51   
52          self.start_pipeline(channels, samplerate) 
53   
54   
55      @staticmethod 
56      @interfacedoc 
57 -    def id(): 
58          return "gst_wav_enc" 
59   
60      @staticmethod 
61      @interfacedoc 
62 -    def description(): 
63          return "Wav GStreamer based encoder" 
64   
65      @staticmethod 
66      @interfacedoc 
67 -    def format(): 
68          return "WAV" 
69   
70      @staticmethod 
71      @interfacedoc 
72 -    def file_extension(): 
73          return "wav" 
74   
75      @staticmethod 
76      @interfacedoc 
77 -    def mime_type(): 
78          return "audio/x-wav" 
79   
80      @interfacedoc 
81 -    def set_metadata(self, metadata): 
82          #TODO 
83          pass 
84