1 | /* |
2 | * Copyright (C) 2012, 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 "AudioSummingJunction.h" |
30 | |
31 | #include "AudioContext.h" |
32 | #include "AudioNodeOutput.h" |
33 | #include <algorithm> |
34 | |
35 | namespace WebCore { |
36 | |
37 | AudioSummingJunction::AudioSummingJunction(AudioContext& context) |
38 | : m_context(context) |
39 | , m_renderingStateNeedUpdating(false) |
40 | { |
41 | } |
42 | |
43 | AudioSummingJunction::~AudioSummingJunction() |
44 | { |
45 | if (m_renderingStateNeedUpdating) |
46 | context().removeMarkedSummingJunction(this); |
47 | } |
48 | |
49 | void AudioSummingJunction::changedOutputs() |
50 | { |
51 | ASSERT(context().isGraphOwner()); |
52 | if (!m_renderingStateNeedUpdating && canUpdateState()) { |
53 | context().markSummingJunctionDirty(this); |
54 | m_renderingStateNeedUpdating = true; |
55 | } |
56 | } |
57 | |
58 | void AudioSummingJunction::updateRenderingState() |
59 | { |
60 | ASSERT(context().isAudioThread() && context().isGraphOwner()); |
61 | |
62 | if (m_renderingStateNeedUpdating && canUpdateState()) { |
63 | // Copy from m_outputs to m_renderingOutputs. |
64 | m_renderingOutputs.resize(m_outputs.size()); |
65 | unsigned i = 0; |
66 | for (auto& output : m_outputs) { |
67 | m_renderingOutputs[i++] = output; |
68 | output->updateRenderingState(); |
69 | } |
70 | |
71 | didUpdate(); |
72 | |
73 | m_renderingStateNeedUpdating = false; |
74 | } |
75 | } |
76 | |
77 | } // namespace WebCore |
78 | |
79 | #endif // ENABLE(WEB_AUDIO) |
80 | |