1 /*
2 * Copyright (C) 2011, 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
27 #if ENABLE(WEB_AUDIO)
28
29 #include "DefaultAudioDestinationNode.h"
30
31 #ifndef NDEBUG
32 #include <stdio.h>
33 #endif
34
35 namespace WebCore {
36
DefaultAudioDestinationNode(AudioContext * context)37 DefaultAudioDestinationNode::DefaultAudioDestinationNode(AudioContext* context)
38 : AudioDestinationNode(context, AudioDestination::hardwareSampleRate())
39 {
40 initialize();
41 }
42
~DefaultAudioDestinationNode()43 DefaultAudioDestinationNode::~DefaultAudioDestinationNode()
44 {
45 uninitialize();
46 }
47
initialize()48 void DefaultAudioDestinationNode::initialize()
49 {
50 if (isInitialized())
51 return;
52
53 double hardwareSampleRate = AudioDestination::hardwareSampleRate();
54 #ifndef NDEBUG
55 fprintf(stderr, ">>>> hardwareSampleRate = %f\n", hardwareSampleRate);
56 #endif
57
58 m_destination = AudioDestination::create(*this, hardwareSampleRate);
59
60 AudioNode::initialize();
61 }
62
uninitialize()63 void DefaultAudioDestinationNode::uninitialize()
64 {
65 if (!isInitialized())
66 return;
67
68 m_destination->stop();
69
70 AudioNode::uninitialize();
71 }
72
startRendering()73 void DefaultAudioDestinationNode::startRendering()
74 {
75 ASSERT(isInitialized());
76 if (isInitialized())
77 m_destination->start();
78 }
79
80 } // namespace WebCore
81
82 #endif // ENABLE(WEB_AUDIO)
83