Revert of Rewrite frame generator capturer to use TaskQueue instead of EventTimeWrapper

webrtc/test/frame_generator_capturer.cc

Index: webrtc/test/frame_generator_capturer.cc
diff --git a/webrtc/test/frame_generator_capturer.cc b/webrtc/test/frame_generator_capturer.cc
index 0b2f1d64bdf49dbfbed487fefdc65622193d2b6a..00efbc8b40b467e2248169349ac498997b8de3d2 100644
--- a/webrtc/test/frame_generator_capturer.cc
+++ b/webrtc/test/frame_generator_capturer.cc
@@ -10,44 +10,16 @@
 
 #include "webrtc/test/frame_generator_capturer.h"
 
-#include <utility>
-#include <vector>
-
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/platform_thread.h"
-#include "webrtc/base/task_queue.h"
 #include "webrtc/system_wrappers/include/clock.h"
+#include "webrtc/system_wrappers/include/event_wrapper.h"
 #include "webrtc/system_wrappers/include/sleep.h"
 #include "webrtc/test/frame_generator.h"
 #include "webrtc/video_send_stream.h"
 
 namespace webrtc {
 namespace test {
-
-class FrameGeneratorCapturer::InsertFrameTask : public rtc::QueuedTask {
- public:
-  // Repeats in |repeat_interval_ms|. One-time if |repeat_interval_ms| == 0.
-  InsertFrameTask(
-      webrtc::test::FrameGeneratorCapturer* frame_generator_capturer,
-      uint32_t repeat_interval_ms)
-      : frame_generator_capturer_(frame_generator_capturer),
-        repeat_interval_ms_(repeat_interval_ms) {}
-
- private:
-  bool Run() override {
-    if (repeat_interval_ms_ > 0) {
-      rtc::TaskQueue::Current()->PostDelayedTask(
-          std::unique_ptr<rtc::QueuedTask>(this),
-          repeat_interval_ms_);
-    }
-    frame_generator_capturer_->InsertFrame();
-    // Task should be deleted only if it's not repeating.
-    return repeat_interval_ms_ == 0;
-  }
-
-  webrtc::test::FrameGeneratorCapturer* const frame_generator_capturer_;
-  const uint32_t repeat_interval_ms_;
-};
 
 FrameGeneratorCapturer* FrameGeneratorCapturer::Create(int width,
                                                        int height,
@@ -89,7 +61,8 @@
       sending_(false),
       sink_(nullptr),
       sink_wants_observer_(nullptr),
-      task_queue_("FrameGeneratorQueue", rtc::TaskQueue::Priority::HIGH),
+      tick_(EventTimerWrapper::Create()),
+      thread_(FrameGeneratorCapturer::Run, this, "FrameGeneratorCapturer"),
       frame_generator_(std::move(frame_generator)),
       target_fps_(target_fps),
       first_frame_capture_time_(-1) {
@@ -99,6 +72,8 @@
 
 FrameGeneratorCapturer::~FrameGeneratorCapturer() {
   Stop();
+
+  thread_.Stop();
 }
 
 void FrameGeneratorCapturer::SetFakeRotation(VideoRotation rotation) {
@@ -112,11 +87,15 @@
   if (frame_generator_.get() == NULL)
     return false;
 
-  task_queue_.PostDelayedTask(
-      std::unique_ptr<rtc::QueuedTask>(
-          new InsertFrameTask(this, 1000 / target_fps_)),
-          1000 / target_fps_);
+  if (!tick_->StartTimer(true, 1000 / target_fps_))
+    return false;
+  thread_.Start();
+  thread_.SetPriority(rtc::kHighPriority);
+  return true;
+}
 
+bool FrameGeneratorCapturer::Run(void* obj) {
+  static_cast<FrameGeneratorCapturer*>(obj)->InsertFrame();
   return true;
 }
 
@@ -134,6 +113,7 @@
         sink_->OnFrame(*frame);
     }
   }
+  tick_->Wait(WEBRTC_EVENT_INFINITE);
 }
 
 void FrameGeneratorCapturer::Start() {
@@ -175,11 +155,7 @@
 }
 
 void FrameGeneratorCapturer::ForceFrame() {
-  // One-time non-repeating task,
-  // therefore repeat_interval_ms is 0 in InsertFrameTask()
-  task_queue_.PostTask(
-      std::unique_ptr<rtc::QueuedTask>(new InsertFrameTask(this, 0)));
+  tick_->Set();
 }
-
-}  // namespace test
-}  // namespace webrtc
+}  // test
+}  // webrtc