1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* vim:set ts=2 sw=2 sts=2 et cindent: */
3 : /* ***** BEGIN LICENSE BLOCK *****
4 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
5 : *
6 : * The contents of this file are subject to the Mozilla Public License Version
7 : * 1.1 (the "License"); you may not use this file except in compliance with
8 : * the License. You may obtain a copy of the License at
9 : * http://www.mozilla.org/MPL/
10 : *
11 : * Software distributed under the License is distributed on an "AS IS" basis,
12 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13 : * for the specific language governing rights and limitations under the
14 : * License.
15 : *
16 : * The Original Code is Mozilla code.
17 : *
18 : * The Initial Developer of the Original Code is the Mozilla Foundation.
19 : * Portions created by the Initial Developer are Copyright (C) 2010
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : * Matthew Gregan <kinetik@flim.org>
24 : *
25 : * Alternatively, the contents of this file may be used under the terms of
26 : * either the GNU General Public License Version 2 or later (the "GPL"), or
27 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 : * in which case the provisions of the GPL or the LGPL are applicable instead
29 : * of those above. If you wish to allow use of your version of this file only
30 : * under the terms of either the GPL or the LGPL, and not to allow others to
31 : * use your version of this file under the terms of the MPL, indicate your
32 : * decision by deleting the provisions above and replace them with the notice
33 : * and other provisions required by the GPL or the LGPL. If you do not delete
34 : * the provisions above, a recipient may use your version of this file under
35 : * the terms of any one of the MPL, the GPL or the LGPL.
36 : *
37 : * ***** END LICENSE BLOCK ***** */
38 : #if !defined(nsWaveDecoder_h_)
39 : #define nsWaveDecoder_h_
40 :
41 : #include "nsBuiltinDecoder.h"
42 :
43 : /**
44 : * The decoder implementation is currently limited to Linear PCM encoded
45 : * audio data with one or two channels of 8- or 16-bit samples at sample
46 : * rates from 100 Hz to 96 kHz. The number of channels is limited by what
47 : * the audio backend (sydneyaudio via nsAudioStream) currently supports. The
48 : * supported sample rate is artificially limited to arbitrarily selected sane
49 : * values. Support for additional channels (and other new features) would
50 : * require extending nsWaveDecoder to support parsing the newer
51 : * WAVE_FORMAT_EXTENSIBLE chunk format.
52 : **/
53 :
54 :
55 : class nsWaveDecoder : public nsBuiltinDecoder
56 0 : {
57 : public:
58 : virtual nsMediaDecoder* Clone() { return new nsWaveDecoder(); }
59 : virtual nsDecoderStateMachine* CreateStateMachine();
60 : };
61 :
62 : #endif
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