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 | #pragma once |
26 | |
27 | #include "AudioBuffer.h" |
28 | #include "AudioDestinationNode.h" |
29 | #include <wtf/RefPtr.h> |
30 | #include <wtf/Threading.h> |
31 | |
32 | namespace WebCore { |
33 | |
34 | class AudioBus; |
35 | class AudioContext; |
36 | |
37 | class OfflineAudioDestinationNode final : public AudioDestinationNode { |
38 | WTF_MAKE_ISO_ALLOCATED(OfflineAudioDestinationNode); |
39 | public: |
40 | static Ref<OfflineAudioDestinationNode> create(AudioContext& context, AudioBuffer* renderTarget) |
41 | { |
42 | return adoptRef(*new OfflineAudioDestinationNode(context, renderTarget)); |
43 | } |
44 | |
45 | virtual ~OfflineAudioDestinationNode(); |
46 | |
47 | // AudioNode |
48 | void initialize() override; |
49 | void uninitialize() override; |
50 | |
51 | // AudioDestinationNode |
52 | void enableInput(const String&) override { } |
53 | void startRendering() override; |
54 | |
55 | float sampleRate() const override { return m_renderTarget->sampleRate(); } |
56 | |
57 | private: |
58 | OfflineAudioDestinationNode(AudioContext&, AudioBuffer* renderTarget); |
59 | |
60 | // This AudioNode renders into this AudioBuffer. |
61 | RefPtr<AudioBuffer> m_renderTarget; |
62 | |
63 | // Temporary AudioBus for each render quantum. |
64 | RefPtr<AudioBus> m_renderBus; |
65 | |
66 | // Rendering thread. |
67 | RefPtr<Thread> m_renderThread; |
68 | bool m_startedRendering; |
69 | bool offlineRender(); |
70 | }; |
71 | |
72 | } // namespace WebCore |
73 | |