Source Code for Module timeside.encoder.m4a

 1  # -*- coding: utf-8 -*- 
 2  # 
 3  # Copyright (c) 2010 Paul Brossier <piem@piem.org> 
 4  # Copyright (c) 2010 Guillaume Pellerin <yomguy@parisson.com> 
 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   
22  from timeside.core import implements, interfacedoc 
23  from timeside.encoder.core import GstEncoder 
24  from timeside.api import IEncoder 
25  from timeside.tools import * 
26   
27   
28 -class AacEncoder(GstEncoder): 
29      """ gstreamer-based AAC encoder """ 
30      implements(IEncoder) 
31   
32 -    def __init__(self, output, streaming = False, overwrite = False): 
33          super(AacEncoder, self).__init__(output, streaming, overwrite) 
34          if self.streaming: 
35              raise Exception("Streaming not supported") 
36   
37      @interfacedoc 
38 -    def setup(self, channels=None, samplerate=None, blocksize=None, totalframes=None): 
39          super(AacEncoder, self).setup(channels, samplerate, blocksize, totalframes) 
40   
41          self.streaming = False 
42          self.pipe = ''' appsrc name=src 
43              ! audioconvert 
44              ! voaacenc 
45              ! mp4mux 
46              ''' 
47   
48          if self.filename and self.streaming: 
49              self.pipe += ''' ! tee name=t 
50              ! queue ! filesink location=%s 
51              t. ! queue ! appsink name=app sync=False 
52              ''' % self.filename 
53   
54          elif self.filename : 
55              self.pipe += '! filesink location=%s async=False sync=False ' % self.filename 
56          else: 
57              self.pipe += '! queue ! appsink name=app sync=False ' 
58   
59          self.start_pipeline(channels, samplerate) 
60   
61   
62      @staticmethod 
63      @interfacedoc 
64 -    def id(): 
65          return "gst_aac_enc" 
66   
67      @staticmethod 
68      @interfacedoc 
69 -    def description(): 
70          return "AAC GStreamer based encoder" 
71   
72      @staticmethod 
73      @interfacedoc 
74 -    def format(): 
75          return "AAC" 
76   
77      @staticmethod 
78      @interfacedoc 
79 -    def file_extension(): 
80          return "m4a" 
81   
82      @staticmethod 
83      @interfacedoc 
84 -    def mime_type(): 
85          return "audio/x-m4a" 
86   
87      @interfacedoc 
88 -    def set_metadata(self, metadata): 
89          self.metadata = metadata 
90