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/PassOwnPtr.h" 37 #include "wtf/PassRefPtr.h" 38 #include "wtf/RefCounted.h" 39 #include "wtf/ThreadingPrimitives.h" 40 #include "wtf/text/WTFString.h" 41 42 namespace blink { 43 class WebAudioSourceProvider; 44 } 45 46 namespace WebCore { 47 48 class MediaStreamDescriptor; 49 class MediaStreamSource; 50 51 class PLATFORM_EXPORT MediaStreamComponent : public RefCounted<MediaStreamComponent> { 52 public: 53 class ExtraData { 54 public: ~ExtraData()55 virtual ~ExtraData() { } 56 }; 57 58 static PassRefPtr<MediaStreamComponent> create(PassRefPtr<MediaStreamSource>); 59 static PassRefPtr<MediaStreamComponent> create(const String& id, PassRefPtr<MediaStreamSource>); 60 source()61 MediaStreamSource* source() const { return m_source.get(); } 62 id()63 String id() const { return m_id; } enabled()64 bool enabled() const { return m_enabled; } setEnabled(bool enabled)65 void setEnabled(bool enabled) { m_enabled = enabled; } 66 67 #if ENABLE(WEB_AUDIO) audioSourceProvider()68 AudioSourceProvider* audioSourceProvider() { return &m_sourceProvider; } setSourceProvider(blink::WebAudioSourceProvider * provider)69 void setSourceProvider(blink::WebAudioSourceProvider* provider) { m_sourceProvider.wrap(provider); } 70 #endif // ENABLE(WEB_AUDIO) 71 extraData()72 ExtraData* extraData() const { return m_extraData.get(); } setExtraData(PassOwnPtr<ExtraData> extraData)73 void setExtraData(PassOwnPtr<ExtraData> extraData) { m_extraData = extraData; } 74 75 private: 76 MediaStreamComponent(const String& id, PassRefPtr<MediaStreamSource>); 77 78 #if ENABLE(WEB_AUDIO) 79 // AudioSourceProviderImpl wraps a WebAudioSourceProvider::provideInput() 80 // calls into chromium to get a rendered audio stream. 81 82 class PLATFORM_EXPORT AudioSourceProviderImpl FINAL: public AudioSourceProvider { 83 public: AudioSourceProviderImpl()84 AudioSourceProviderImpl() 85 : m_webAudioSourceProvider(0) 86 { 87 } 88 ~AudioSourceProviderImpl()89 virtual ~AudioSourceProviderImpl() { } 90 91 // Wraps the given blink::WebAudioSourceProvider to WebCore::AudioSourceProvider. 92 void wrap(blink::WebAudioSourceProvider*); 93 94 // WebCore::AudioSourceProvider 95 virtual void provideInput(WebCore::AudioBus*, size_t framesToProcess) OVERRIDE; 96 97 private: 98 blink::WebAudioSourceProvider* m_webAudioSourceProvider; 99 Mutex m_provideInputLock; 100 }; 101 102 AudioSourceProviderImpl m_sourceProvider; 103 #endif // ENABLE(WEB_AUDIO) 104 105 RefPtr<MediaStreamSource> m_source; 106 String m_id; 107 bool m_enabled; 108 OwnPtr<ExtraData> m_extraData; 109 }; 110 111 typedef Vector<RefPtr<MediaStreamComponent> > MediaStreamComponentVector; 112 113 } // namespace WebCore 114 115 #endif // MediaStreamComponent_h 116