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#include "config.h"
26#include "WebAudioBus.h"
27
28#if ENABLE(WEB_AUDIO)
29#include "AudioBus.h"
30#else
31namespace WebCore {
32class AudioBus {
33};
34} // namespace WebCore
35#endif
36
37#include <wtf/OwnPtr.h>
38#include <wtf/PassOwnPtr.h>
39
40using namespace WebCore;
41
42namespace WebKit {
43
44class WebAudioBusPrivate : public AudioBus {
45};
46
47void WebAudioBus::initialize(unsigned numberOfChannels, size_t length, double sampleRate)
48{
49#if ENABLE(WEB_AUDIO)
50    AudioBus* audioBus = new AudioBus(numberOfChannels, length);
51    audioBus->setSampleRate(sampleRate);
52
53    if (m_private)
54        delete m_private;
55    m_private = static_cast<WebAudioBusPrivate*>(audioBus);
56#else
57    ASSERT_NOT_REACHED();
58#endif
59}
60
61void WebAudioBus::reset()
62{
63#if ENABLE(WEB_AUDIO)
64    delete m_private;
65    m_private = 0;
66#else
67    ASSERT_NOT_REACHED();
68#endif
69}
70
71unsigned WebAudioBus::numberOfChannels() const
72{
73#if ENABLE(WEB_AUDIO)
74    if (!m_private)
75        return 0;
76    return m_private->numberOfChannels();
77#else
78    ASSERT_NOT_REACHED();
79    return 0;
80#endif
81}
82
83size_t WebAudioBus::length() const
84{
85#if ENABLE(WEB_AUDIO)
86    if (!m_private)
87        return 0;
88    return m_private->length();
89#else
90    ASSERT_NOT_REACHED();
91    return 0;
92#endif
93}
94
95double WebAudioBus::sampleRate() const
96{
97#if ENABLE(WEB_AUDIO)
98    if (!m_private)
99        return 0;
100    return m_private->sampleRate();
101#else
102    ASSERT_NOT_REACHED();
103    return 0;
104#endif
105}
106
107float* WebAudioBus::channelData(unsigned channelIndex)
108{
109#if ENABLE(WEB_AUDIO)
110    if (!m_private)
111        return 0;
112    ASSERT(channelIndex < numberOfChannels());
113    return m_private->channel(channelIndex)->data();
114#else
115    ASSERT_NOT_REACHED();
116    return 0;
117#endif
118}
119
120PassOwnPtr<AudioBus> WebAudioBus::release()
121{
122#if ENABLE(WEB_AUDIO)
123    OwnPtr<AudioBus> audioBus(adoptPtr(static_cast<AudioBus*>(m_private)));
124    m_private = 0;
125    return audioBus.release();
126#else
127    ASSERT_NOT_REACHED();
128    return 0;
129#endif
130}
131
132} // namespace WebKit
133