1/*
2 * Copyright (C) 2011 Ericsson AB. All rights reserved.
3 * Copyright (C) 2013 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer
13 *    in the documentation and/or other materials provided with the
14 *    distribution.
15 * 3. Neither the name of Ericsson nor the names of its contributors
16 *    may be used to endorse or promote products derived from this
17 *    software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef MediaStreamComponent_h
33#define MediaStreamComponent_h
34
35#include "platform/audio/AudioSourceProvider.h"
36#include "wtf/PassRefPtr.h"
37#include "wtf/RefCounted.h"
38#include "wtf/ThreadingPrimitives.h"
39#include "wtf/text/WTFString.h"
40
41namespace blink {
42class WebAudioSourceProvider;
43}
44
45namespace WebCore {
46
47class MediaStreamDescriptor;
48class MediaStreamSource;
49
50class PLATFORM_EXPORT MediaStreamComponent : public RefCounted<MediaStreamComponent> {
51public:
52    class ExtraData : public RefCounted<ExtraData> {
53    public:
54        virtual ~ExtraData() { }
55    };
56
57    static PassRefPtr<MediaStreamComponent> create(PassRefPtr<MediaStreamSource>);
58    static PassRefPtr<MediaStreamComponent> create(const String& id, PassRefPtr<MediaStreamSource>);
59    static PassRefPtr<MediaStreamComponent> create(MediaStreamDescriptor*, PassRefPtr<MediaStreamSource>);
60
61    MediaStreamDescriptor* stream() const { return m_stream; }
62    void setStream(MediaStreamDescriptor* stream) { m_stream = stream; }
63
64    MediaStreamSource* source() const { return m_source.get(); }
65
66    String id() const { return m_id; }
67    bool enabled() const { return m_enabled; }
68    void setEnabled(bool enabled) { m_enabled = enabled; }
69
70#if ENABLE(WEB_AUDIO)
71    AudioSourceProvider* audioSourceProvider() { return &m_sourceProvider; }
72    void setSourceProvider(blink::WebAudioSourceProvider* provider) { m_sourceProvider.wrap(provider); }
73#endif // ENABLE(WEB_AUDIO)
74
75    ExtraData* extraData() const { return m_extraData.get(); }
76    void setExtraData(PassRefPtr<ExtraData> extraData) { m_extraData = extraData; }
77
78private:
79    MediaStreamComponent(const String& id, MediaStreamDescriptor*, PassRefPtr<MediaStreamSource>);
80
81#if ENABLE(WEB_AUDIO)
82    // AudioSourceProviderImpl wraps a WebAudioSourceProvider::provideInput()
83    // calls into chromium to get a rendered audio stream.
84
85    class AudioSourceProviderImpl : public AudioSourceProvider {
86    public:
87        AudioSourceProviderImpl()
88            : m_webAudioSourceProvider(0)
89        {
90        }
91
92        virtual ~AudioSourceProviderImpl() { }
93
94        // Wraps the given blink::WebAudioSourceProvider to WebCore::AudioSourceProvider.
95        void wrap(blink::WebAudioSourceProvider*);
96
97        // WebCore::AudioSourceProvider
98        virtual void provideInput(WebCore::AudioBus*, size_t framesToProcess);
99
100    private:
101        blink::WebAudioSourceProvider* m_webAudioSourceProvider;
102        Mutex m_provideInputLock;
103    };
104
105    AudioSourceProviderImpl m_sourceProvider;
106#endif // ENABLE(WEB_AUDIO)
107
108    MediaStreamDescriptor* m_stream;
109    RefPtr<MediaStreamSource> m_source;
110    String m_id;
111    bool m_enabled;
112    RefPtr<ExtraData> m_extraData;
113};
114
115typedef Vector<RefPtr<MediaStreamComponent> > MediaStreamComponentVector;
116
117} // namespace WebCore
118
119#endif // MediaStreamComponent_h
120