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1 /*
2  * Copyright (C) 2010, Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1.  Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2.  Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23  */
24 
25 #ifndef DelayProcessor_h
26 #define DelayProcessor_h
27 
28 #include "platform/audio/AudioDSPKernelProcessor.h"
29 #include "modules/webaudio/AudioParam.h"
30 #include "wtf/PassOwnPtr.h"
31 #include "wtf/RefPtr.h"
32 
33 namespace blink {
34 
35 class AudioDSPKernel;
36 
37 class DelayProcessor FINAL : public AudioDSPKernelProcessor {
38 public:
39     DelayProcessor(AudioContext*, float sampleRate, unsigned numberOfChannels, double maxDelayTime);
40     virtual ~DelayProcessor();
41     virtual void trace(Visitor*) OVERRIDE;
42 
43     virtual PassOwnPtr<AudioDSPKernel> createKernel() OVERRIDE;
44 
delayTime()45     AudioParam* delayTime() const { return m_delayTime.get(); }
46 
maxDelayTime()47     double maxDelayTime() { return m_maxDelayTime; }
48 private:
49 
50     Member<AudioParam> m_delayTime;
51     double m_maxDelayTime;
52 };
53 
54 } // namespace blink
55 
56 #endif // DelayProcessor_h
57