Introduce new constructor to PlatformThread.

webrtc/common_video/incoming_video_stream.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/common_video/include/incoming_video_stream.h"
 
 #include "webrtc/base/timeutils.h"
 #include "webrtc/common_video/video_render_frames.h"
 #include "webrtc/system_wrappers/include/critical_section_wrapper.h"
 #include "webrtc/system_wrappers/include/event_wrapper.h"
 
 namespace webrtc {
+namespace {
+const int kEventStartupTimeMs = 10;
+const int kEventMaxWaitTimeMs = 100;
+}  // namespace
 
 IncomingVideoStream::IncomingVideoStream(
     int32_t delay_ms,
     rtc::VideoSinkInterface<VideoFrame>* callback)
     : incoming_render_thread_(&IncomingVideoStreamThreadFun,
                               this,
-                              "IncomingVideoStreamThread"),
+                              "IncomingVideoStreamThread",
+                              rtc::kRealtimePriority),
       deliver_buffer_event_(EventTimerWrapper::Create()),
       external_callback_(callback),
       render_buffers_(new VideoRenderFrames(delay_ms)) {
   RTC_DCHECK(external_callback_);
 
   render_thread_checker_.DetachFromThread();
 
   deliver_buffer_event_->StartTimer(false, kEventStartupTimeMs);
   incoming_render_thread_.Start();
-  incoming_render_thread_.SetPriority(rtc::kRealtimePriority);
 }
 
 IncomingVideoStream::~IncomingVideoStream() {
   RTC_DCHECK(main_thread_checker_.CalledOnValidThread());
 
   {
     rtc::CritScope cs(&buffer_critsect_);
     render_buffers_.reset();
   }
 
   deliver_buffer_event_->Set();
   incoming_render_thread_.Stop();
   deliver_buffer_event_->StopTimer();
 }
 
 void IncomingVideoStream::OnFrame(const VideoFrame& video_frame) {
   RTC_CHECK_RUNS_SERIALIZED(&decoder_race_checker_);
   // Hand over or insert frame.
   rtc::CritScope csB(&buffer_critsect_);
   if (render_buffers_->AddFrame(video_frame) == 1) {
     deliver_buffer_event_->Set();
   }
 }
 
-bool IncomingVideoStream::IncomingVideoStreamThreadFun(void* obj) {
-  return static_cast<IncomingVideoStream*>(obj)->IncomingVideoStreamProcess();
+// static
+void IncomingVideoStream::IncomingVideoStreamThreadFun(void* obj) {
+  static_cast<IncomingVideoStream*>(obj)->IncomingVideoStreamProcess();
 }
 
-bool IncomingVideoStream::IncomingVideoStreamProcess() {
+void IncomingVideoStream::IncomingVideoStreamProcess() {
   RTC_DCHECK_RUN_ON(&render_thread_checker_);
 
-  if (kEventError != deliver_buffer_event_->Wait(kEventMaxWaitTimeMs)) {
-    // Get a new frame to render and the time for the frame after this one.
-    rtc::Optional<VideoFrame> frame_to_render;
-    uint32_t wait_time;
-    {
-      rtc::CritScope cs(&buffer_critsect_);
-      if (!render_buffers_.get()) {
-        // Terminating
-        return false;
+  while (true) {
+    if (kEventError != deliver_buffer_event_->Wait(kEventMaxWaitTimeMs)) {
+      // Get a new frame to render and the time for the frame after this one.
+      rtc::Optional<VideoFrame> frame_to_render;
+      uint32_t wait_time;
+      {
+        rtc::CritScope cs(&buffer_critsect_);
+        if (!render_buffers_.get()) {
+          // Terminating
+          return;
+        }
+
+        frame_to_render = render_buffers_->FrameToRender();
+        wait_time = render_buffers_->TimeToNextFrameRelease();
       }
-      frame_to_render = render_buffers_->FrameToRender();
-      wait_time = render_buffers_->TimeToNextFrameRelease();
-    }
 
-    // Set timer for next frame to render.
-    if (wait_time > kEventMaxWaitTimeMs) {
-      wait_time = kEventMaxWaitTimeMs;
-    }
+      // Set timer for next frame to render.
+      if (wait_time > kEventMaxWaitTimeMs) {
+        wait_time = kEventMaxWaitTimeMs;
+      }
 
-    deliver_buffer_event_->StartTimer(false, wait_time);
+      deliver_buffer_event_->StartTimer(false, wait_time);
 
-    if (frame_to_render) {
-      external_callback_->OnFrame(*frame_to_render);
+      if (frame_to_render) {
+        external_callback_->OnFrame(*frame_to_render);
+      }
+    } else {
+      RTC_NOTREACHED();
     }
   }
-  return true;
 }
 
 }  // namespace webrtc