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 "modules/webaudio/MediaStreamAudioDestinationNode.h"
30
31 #include "modules/webaudio/AudioContext.h"
32 #include "modules/webaudio/AudioNodeInput.h"
33 #include "platform/UUID.h"
34 #include "platform/mediastream/MediaStreamCenter.h"
35 #include "public/platform/WebRTCPeerConnectionHandler.h"
36 #include "wtf/Locker.h"
37
38 namespace WebCore {
39
create(AudioContext * context,size_t numberOfChannels)40 PassRefPtrWillBeRawPtr<MediaStreamAudioDestinationNode> MediaStreamAudioDestinationNode::create(AudioContext* context, size_t numberOfChannels)
41 {
42 return adoptRefWillBeNoop(new MediaStreamAudioDestinationNode(context, numberOfChannels));
43 }
44
MediaStreamAudioDestinationNode(AudioContext * context,size_t numberOfChannels)45 MediaStreamAudioDestinationNode::MediaStreamAudioDestinationNode(AudioContext* context, size_t numberOfChannels)
46 : AudioBasicInspectorNode(context, context->sampleRate(), numberOfChannels)
47 , m_mixBus(AudioBus::create(numberOfChannels, ProcessingSizeInFrames))
48 {
49 ScriptWrappable::init(this);
50 setNodeType(NodeTypeMediaStreamAudioDestination);
51
52 m_source = MediaStreamSource::create("WebAudio-" + createCanonicalUUIDString(), MediaStreamSource::TypeAudio, "MediaStreamAudioDestinationNode", MediaStreamSource::ReadyStateLive, true);
53 MediaStreamSourceVector audioSources;
54 audioSources.append(m_source);
55 MediaStreamSourceVector videoSources;
56 m_stream = MediaStream::create(context->executionContext(), MediaStreamDescriptor::create(audioSources, videoSources));
57 MediaStreamCenter::instance().didCreateMediaStreamAndTracks(m_stream->descriptor());
58
59 m_source->setAudioFormat(numberOfChannels, context->sampleRate());
60
61 initialize();
62 }
63
~MediaStreamAudioDestinationNode()64 MediaStreamAudioDestinationNode::~MediaStreamAudioDestinationNode()
65 {
66 uninitialize();
67 }
68
process(size_t numberOfFrames)69 void MediaStreamAudioDestinationNode::process(size_t numberOfFrames)
70 {
71 m_mixBus->copyFrom(*input(0)->bus());
72 m_source->consumeAudio(m_mixBus.get(), numberOfFrames);
73 }
74
75 } // namespace WebCore
76
77 #endif // ENABLE(WEB_AUDIO)
78