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| 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 #include "content/renderer/media/video_source_handler.h" |
| 6 |
| 7 #include <string> |
| 8 |
| 9 #include "base/logging.h" |
| 10 #include "content/renderer/media/media_stream_dependency_factory.h" |
| 11 #include "content/renderer/render_thread_impl.h" |
| 12 #include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaStreamRegistr
y.h" |
| 13 |
| 14 using cricket::VideoFrame; |
| 15 using webrtc::VideoSourceInterface; |
| 16 |
| 17 namespace content { |
| 18 |
| 19 PpFrameReader::PpFrameReader() { |
| 20 } |
| 21 |
| 22 PpFrameReader::~PpFrameReader() { |
| 23 } |
| 24 |
| 25 bool PpFrameReader::SetSize(int width, int height, int reserved) { |
| 26 return true; |
| 27 } |
| 28 |
| 29 bool PpFrameReader::RenderFrame(const VideoFrame* frame) { |
| 30 base::AutoLock auto_lock(lock_); |
| 31 // Make a shallow copy of the frame. Both frames will share a single |
| 32 // reference-counted frame buffer. |
| 33 last_frame_.reset(frame->Copy()); |
| 34 return true; |
| 35 } |
| 36 |
| 37 bool PpFrameReader::GetFrame(VideoFrame** frame) { |
| 38 base::AutoLock auto_lock(lock_); |
| 39 *frame = last_frame_.release(); |
| 40 return true; |
| 41 } |
| 42 |
| 43 VideoSourceHandler::VideoSourceHandler( |
| 44 MediaStreamDependencyFactory* factory, |
| 45 MediaStreamRegistryInterface* registry) |
| 46 : factory_(factory), |
| 47 registry_(registry) { |
| 48 ASSERT(factory_ != NULL); |
| 49 } |
| 50 |
| 51 bool VideoSourceHandler::Open(const std::string& url, |
| 52 FrameReaderInterface** frame_reader) { |
| 53 scoped_refptr<webrtc::VideoSourceInterface> source = GetFirstVideoSource(url); |
| 54 if (!source.get()) { |
| 55 return false; |
| 56 } |
| 57 PpFrameReader* new_frame_reader = new PpFrameReader(); |
| 58 source->AddSink(new_frame_reader); |
| 59 *frame_reader = new_frame_reader; |
| 60 return true; |
| 61 } |
| 62 |
| 63 bool VideoSourceHandler::Close(const std::string& url, |
| 64 FrameReaderInterface* frame_reader) { |
| 65 scoped_refptr<webrtc::VideoSourceInterface> source = GetFirstVideoSource(url); |
| 66 if (!source.get()) { |
| 67 return false; |
| 68 } |
| 69 PpFrameReader* pp_frame_reader = static_cast<PpFrameReader*>(frame_reader); |
| 70 source->RemoveSink(pp_frame_reader); |
| 71 return true; |
| 72 } |
| 73 |
| 74 scoped_refptr<VideoSourceInterface> VideoSourceHandler::GetFirstVideoSource( |
| 75 const std::string& url) { |
| 76 scoped_refptr<webrtc::VideoSourceInterface> source; |
| 77 WebKit::WebMediaStream stream; |
| 78 if (registry_) { |
| 79 stream = registry_->GetMediaStream(url); |
| 80 } else { |
| 81 stream = |
| 82 WebKit::WebMediaStreamRegistry::lookupMediaStreamDescriptor(GURL(url)); |
| 83 } |
| 84 if (stream.isNull() || !stream.extraData()) { |
| 85 LOG(ERROR) << "GetFirstVideoSource - invalid url: " << url; |
| 86 return source; |
| 87 } |
| 88 |
| 89 // Get the first video track from the stream. |
| 90 MediaStreamExtraData* extra_data = |
| 91 static_cast<MediaStreamExtraData*>(stream.extraData()); |
| 92 if (!extra_data) { |
| 93 LOG(ERROR) << "GetFirstVideoSource - MediaStreamExtraData is NULL."; |
| 94 return source; |
| 95 } |
| 96 webrtc::MediaStreamInterface* native_stream = extra_data->stream(); |
| 97 if (!native_stream) { |
| 98 LOG(ERROR) << "GetFirstVideoSource - native stream is NULL."; |
| 99 return source; |
| 100 } |
| 101 webrtc::VideoTrackVector native_video_tracks = |
| 102 native_stream->GetVideoTracks(); |
| 103 if (native_video_tracks.empty()) { |
| 104 LOG(ERROR) << "GetFirstVideoSource - stream has no video track."; |
| 105 return source; |
| 106 } |
| 107 source = native_video_tracks[0]->GetSource(); |
| 108 return source; |
| 109 } |
| 110 |
| 111 } // namespace content |
| 112 |
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