1 // Copyright (c) 2013 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_WEBRTC_VIDEO_DESTINATION_HANDLER_H_ 6 #define CONTENT_RENDERER_MEDIA_WEBRTC_VIDEO_DESTINATION_HANDLER_H_ 7 8 #include <string> 9 #include <vector> 10 11 #include "base/compiler_specific.h" 12 #include "base/memory/weak_ptr.h" 13 #include "content/common/content_export.h" 14 #include "content/renderer/media/media_stream_video_source.h" 15 #include "media/base/video_frame_pool.h" 16 17 namespace content { 18 19 class PeerConnectionDependencyFactory; 20 class MediaStreamRegistryInterface; 21 class PPB_ImageData_Impl; 22 23 // Interface used by the effects pepper plugin to output the processed frame 24 // to the video track. 25 class CONTENT_EXPORT FrameWriterInterface { 26 public: 27 // The ownership of the |image_data| deosn't transfer. So the implementation 28 // of this interface should make a copy of the |image_data| before return. 29 virtual void PutFrame(PPB_ImageData_Impl* image_data, 30 int64 time_stamp_ns) = 0; ~FrameWriterInterface()31 virtual ~FrameWriterInterface() {} 32 }; 33 34 // PpFrameWriter implements MediaStreamVideoSource and can therefore provide 35 // video frames to MediaStreamVideoTracks. It also implements 36 // FrameWriterInterface, which will be used by the effects pepper plugin to 37 // inject the processed frame. 38 class CONTENT_EXPORT PpFrameWriter NON_EXPORTED_BASE(public MediaStreamVideoSource)39 : NON_EXPORTED_BASE(public MediaStreamVideoSource), 40 public FrameWriterInterface, 41 NON_EXPORTED_BASE(public base::SupportsWeakPtr<PpFrameWriter>) { 42 public: 43 PpFrameWriter(); 44 virtual ~PpFrameWriter(); 45 46 // FrameWriterInterface implementation. 47 // This method will be called by the Pepper host from render thread. 48 virtual void PutFrame(PPB_ImageData_Impl* image_data, 49 int64 time_stamp_ns) OVERRIDE; 50 protected: 51 // MediaStreamVideoSource implementation. 52 virtual void GetCurrentSupportedFormats( 53 int max_requested_width, 54 int max_requested_height, 55 const VideoCaptureDeviceFormatsCB& callback) OVERRIDE; 56 virtual void StartSourceImpl( 57 const media::VideoCaptureParams& params, 58 const VideoCaptureDeliverFrameCB& frame_callback) OVERRIDE; 59 virtual void StopSourceImpl() OVERRIDE; 60 61 private: 62 media::VideoFramePool frame_pool_; 63 64 class FrameWriterDelegate; 65 scoped_refptr<FrameWriterDelegate> delegate_; 66 67 DISALLOW_COPY_AND_ASSIGN(PpFrameWriter); 68 }; 69 70 // VideoDestinationHandler is a glue class between the content MediaStream and 71 // the effects pepper plugin host. 72 class CONTENT_EXPORT VideoDestinationHandler { 73 public: 74 // Instantiates and adds a new video track to the MediaStream specified by 75 // |url|. Returns a handler for delivering frames to the new video track as 76 // |frame_writer|. 77 // If |registry| is NULL the global blink::WebMediaStreamRegistry will be 78 // used to look up the media stream. 79 // The caller of the function takes the ownership of |frame_writer|. 80 // Returns true on success and false on failure. 81 static bool Open(MediaStreamRegistryInterface* registry, 82 const std::string& url, 83 FrameWriterInterface** frame_writer); 84 85 private: 86 DISALLOW_COPY_AND_ASSIGN(VideoDestinationHandler); 87 }; 88 89 } // namespace content 90 91 #endif // CONTENT_RENDERER_MEDIA_VIDEO_DESTINATION_HANDLER_H_ 92 93