Cast: Basic cast_receiver API for chrome.

content/renderer/media/media_stream_video_capturer_source.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/media_stream_video_capturer_source.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "content/renderer/media/video_capture_impl_manager.h"
@@ skipping 87 matching lines @@
       session_id_,
       media::BindToCurrentLoop(
           base::Bind(
               &VideoCapturerDelegate::OnDeviceFormatsInUseReceived,
               weak_factory_.GetWeakPtr())));
 }
 
 void VideoCapturerDelegate::StartCapture(
     const media::VideoCaptureParams& params,
     const VideoCaptureDeliverFrameCB& new_frame_callback,
+    scoped_refptr<base::SingleThreadTaskRunner> frame_callback_task_runner,
     const RunningCallback& running_callback) {
   DCHECK(params.requested_format.IsValid());
   DCHECK(thread_checker_.CalledOnValidThread());
   running_callback_ = running_callback;
 
+
   // NULL in unit test.
   if (!RenderThreadImpl::current())
     return;
   VideoCaptureImplManager* manager =
       RenderThreadImpl::current()->video_capture_impl_manager();
   if (!manager)
     return;
+  if (frame_callback_task_runner !=
+      RenderThreadImpl::current()->GetIOMessageLoopProxy()) {
+    DCHECK(false) << "Only IO thread supported right now.";
+    running_callback.Run(false);
+    return;
+  }
+
   stop_capture_cb_ =
       manager->StartCapture(
           session_id_,
           params,
           media::BindToCurrentLoop(base::Bind(
               &VideoCapturerDelegate::OnStateUpdateOnRenderThread,
               weak_factory_.GetWeakPtr())),
           new_frame_callback);
 }
 
 void VideoCapturerDelegate::StopCapture() {
   // Immediately make sure we don't provide more frames.
   DVLOG(3) << "VideoCapturerDelegate::StopCapture()";
   DCHECK(thread_checker_.CalledOnValidThread());
   if (!stop_capture_cb_.is_null()) {
     base::ResetAndReturn(&stop_capture_cb_).Run();
   }
   running_callback_.Reset();
   source_formats_callback_.Reset();
 }
 
 void VideoCapturerDelegate::OnStateUpdateOnRenderThread(
     VideoCaptureState state) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DVLOG(3) << "OnStateUpdateOnRenderThread state = " << state;
   if (state == VIDEO_CAPTURE_STATE_STARTED && !running_callback_.is_null()) {
-    running_callback_.Run(MEDIA_DEVICE_OK);
+    running_callback_.Run(true);
     return;
   }
   if (state > VIDEO_CAPTURE_STATE_STARTED && !running_callback_.is_null()) {
-    base::ResetAndReturn(&running_callback_).Run(
-        MEDIA_DEVICE_TRACK_START_FAILURE);
+    base::ResetAndReturn(&running_callback_).Run(false);
   }
 }
 
 void VideoCapturerDelegate::OnDeviceFormatsInUseReceived(
     const media::VideoCaptureFormats& formats_in_use) {
   DVLOG(3) << "OnDeviceFormatsInUseReceived: " << formats_in_use.size();
   DCHECK(thread_checker_.CalledOnValidThread());
   // StopCapture() might have destroyed |source_formats_callback_| before
   // arriving here.
   if (source_formats_callback_.is_null())
@@ skipping 44 matching lines @@
             kVideoFrameRates[j], media::PIXEL_FORMAT_I420));
       }
     }
     base::ResetAndReturn(&source_formats_callback_).Run(default_formats);
   }
 }
 
 MediaStreamVideoCapturerSource::MediaStreamVideoCapturerSource(
     const StreamDeviceInfo& device_info,
     const SourceStoppedCallback& stop_callback,
-    scoped_ptr<VideoCapturerDelegate> delegate)
-    : delegate_(delegate.Pass()) {
+    scoped_refptr<media::VideoCapturerSource> delegate)
+    : delegate_(delegate) {
   SetDeviceInfo(device_info);
   SetStopCallback(stop_callback);
 }
 
 MediaStreamVideoCapturerSource::~MediaStreamVideoCapturerSource() {
 }
 
 void MediaStreamVideoCapturerSource::GetCurrentSupportedFormats(
     int max_requested_width,
     int max_requested_height,
@@ skipping 12 matching lines @@
   media::VideoCaptureParams new_params;
   new_params.requested_format = format;
   if (device_info().device.type == MEDIA_TAB_VIDEO_CAPTURE ||
       device_info().device.type == MEDIA_DESKTOP_VIDEO_CAPTURE) {
     new_params.resolution_change_policy =
         media::RESOLUTION_POLICY_DYNAMIC_WITHIN_LIMIT;
   }
   delegate_->StartCapture(
       new_params,
       frame_callback,
-      base::Bind(&MediaStreamVideoCapturerSource::OnStartDone,
+      RenderThreadImpl::current() ? NULL :
+      RenderThreadImpl::current()->GetIOMessageLoopProxy(),

[perkj_chrome, 2015/02/09 14:50:27]

indentation

+      base::Bind(&MediaStreamVideoCapturerSource::OnStarted,
                  base::Unretained(this)));
 }
 
+void MediaStreamVideoCapturerSource::OnStarted(bool result) {
+  OnStartDone(result ? MEDIA_DEVICE_OK : MEDIA_DEVICE_TRACK_START_FAILURE);
+}
+
 void MediaStreamVideoCapturerSource::StopSourceImpl() {
   delegate_->StopCapture();
 }
 
 }  // namespace content