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 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef AudioDestinationChromium_h
30#define AudioDestinationChromium_h
31
32#include "AudioBus.h"
33#include "AudioDestination.h"
34#include "WebAudioDevice.h"
35#include "WebVector.h"
36
37namespace WebKit { class WebAudioDevice; }
38
39namespace WebCore {
40
41// An AudioDestination using Chromium's audio system
42
43class AudioDestinationChromium : public AudioDestination, public WebKit::WebAudioDevice::RenderCallback {
44public:
45    AudioDestinationChromium(AudioSourceProvider&, double sampleRate);
46    virtual ~AudioDestinationChromium();
47
48    virtual void start();
49    virtual void stop();
50    bool isPlaying() { return m_isPlaying; }
51
52    double sampleRate() const { return m_sampleRate; }
53
54    // WebKit::WebAudioDevice::RenderCallback
55    virtual void render(const WebKit::WebVector<float*>& audioData, size_t numberOfFrames);
56
57private:
58    AudioSourceProvider& m_provider;
59    AudioBus m_renderBus;
60    double m_sampleRate;
61    bool m_isPlaying;
62    OwnPtr<WebKit::WebAudioDevice> m_audioDevice;
63};
64
65} // namespace WebCore
66
67#endif // AudioDestinationChromium_h
68