1 // Copyright 2014 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_RENDERER_MEDIA_MEDIA_STREAM_SOURCE_H_ 6 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_SOURCE_H_ 7 8 #include "base/callback.h" 9 #include "base/compiler_specific.h" 10 #include "base/logging.h" 11 #include "content/common/content_export.h" 12 #include "content/common/media/media_stream_options.h" 13 #include "third_party/WebKit/public/platform/WebMediaStreamSource.h" 14 15 namespace blink { 16 class WebMediaStreamTrack; 17 } // namespace blink 18 19 namespace content { 20 21 class CONTENT_EXPORT MediaStreamSource 22 : NON_EXPORTED_BASE(public blink::WebMediaStreamSource::ExtraData) { 23 public: 24 typedef base::Callback<void(const blink::WebMediaStreamSource& source)> 25 SourceStoppedCallback; 26 27 typedef base::Callback<void(MediaStreamSource* source, 28 bool success)> ConstraintsCallback; 29 30 // Source constraints key for 31 // http://dev.w3.org/2011/webrtc/editor/getusermedia.html. 32 static const char kSourceId[]; 33 34 MediaStreamSource(); 35 virtual ~MediaStreamSource(); 36 37 // Returns device information about a source that has been created by a 38 // JavaScript call to GetUserMedia, e.g., a camera or microphone. 39 const StreamDeviceInfo& device_info() const { 40 return device_info_; 41 } 42 43 // Stops the source (by calling DoStopSource()). This sets the 44 // WebMediaStreamSource::readyState to ended, triggers the |stop_callback_| 45 // if set. All pointers to this object are invalid after calling this. 46 void StopSource(); 47 48 void ResetSourceStoppedCallback() { 49 DCHECK(!stop_callback_.is_null()); 50 stop_callback_.Reset(); 51 } 52 53 protected: 54 // Called when StopSource is called. It allows derived classes to implement 55 // its own Stop method. 56 virtual void DoStopSource() = 0; 57 58 // Sets device information about a source that has been created by a 59 // JavaScript call to GetUserMedia. F.E a camera or microphone. 60 void SetDeviceInfo(const StreamDeviceInfo& device_info) { 61 device_info_ = device_info; 62 } 63 64 // Sets a callback that will be triggered when StopSource is called. 65 void SetStopCallback(const SourceStoppedCallback& stop_callback) { 66 DCHECK(stop_callback_.is_null()); 67 stop_callback_ = stop_callback; 68 } 69 70 private: 71 StreamDeviceInfo device_info_; 72 SourceStoppedCallback stop_callback_; 73 74 DISALLOW_COPY_AND_ASSIGN(MediaStreamSource); 75 }; 76 77 } // namespace content 78 79 #endif // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_SOURCE_H_ 80
