Reland "Replacing rtc::Thread with task queue for TestAudioDeviceModule."

This is a reland of 1b871d07532c25d2f27e4db192cb9ce2229b1cee

Original change's description:
> Replacing rtc::Thread with task queue for TestAudioDeviceModule.
>
> This prepares for running it in simulated time.
>
> TBR=henrika@webrtc.org
>
> Bug: webrtc:10465
> Change-Id: I9b29b8af9aeba7f0c8209ca77294a63d8068ff1a
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/126481
> Reviewed-by: Sebastian Jansson <srte@webrtc.org>
> Reviewed-by: Oskar Sundbom <ossu@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#27083}

TBR=henrika@webrtc.org

Bug: webrtc:10465
Change-Id: Icda8043fb5b1156129bc3b706bf8f190782b0921
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/127520
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27093}

modules/audio_device/BUILD.gn

@@ -203,6 +203,8 @@ rtc_source_set("audio_device_impl") {
     ":audio_device_generic",
     "../../api:array_view",
     "../../api:scoped_refptr",
+    "../../api/task_queue:global_task_queue_factory",
+    "../../api/task_queue:task_queue",
     "../../common_audio",
     "../../common_audio:common_audio_c",
     "../../rtc_base:checks",
@@ -212,6 +214,7 @@ rtc_source_set("audio_device_impl") {
     "../../rtc_base:rtc_task_queue",
     "../../rtc_base/system:arch",
     "../../rtc_base/system:file_wrapper",
+    "../../rtc_base/task_utils:repeating_task",
     "../../system_wrappers",
     "../../system_wrappers:metrics",
     "../utility",

modules/audio_device/include/test_audio_device.cc

@@ -18,6 +18,7 @@
 
 #include "absl/memory/memory.h"
 #include "api/array_view.h"
+#include "api/task_queue/global_task_queue_factory.h"
 #include "common_audio/wav_file.h"
 #include "modules/audio_device/include/audio_device_default.h"
 #include "modules/audio_device/include/test_audio_device.h"
@@ -30,7 +31,8 @@
 #include "rtc_base/platform_thread.h"
 #include "rtc_base/random.h"
 #include "rtc_base/ref_counted_object.h"
-#include "rtc_base/thread.h"
+#include "rtc_base/task_queue.h"
+#include "rtc_base/task_utils/repeating_task.h"
 #include "rtc_base/thread_annotations.h"
 #include "rtc_base/time_utils.h"
 
@@ -53,16 +55,17 @@ class TestAudioDeviceModuleImpl
   // |renderer| is an object that receives audio data that would have been
   // played out. Can be nullptr if this device is never used for playing.
   // Use one of the Create... functions to get these instances.
-  TestAudioDeviceModuleImpl(std::unique_ptr<Capturer> capturer,
+  TestAudioDeviceModuleImpl(TaskQueueFactory* task_queue_factory,
+                            std::unique_ptr<Capturer> capturer,
                             std::unique_ptr<Renderer> renderer,
                             float speed = 1)
-      : capturer_(std::move(capturer)),
+      : task_queue_factory_(task_queue_factory),
+        capturer_(std::move(capturer)),
         renderer_(std::move(renderer)),
         process_interval_us_(kFrameLengthUs / speed),
         audio_callback_(nullptr),
         rendering_(false),
-        capturing_(false),
-        stop_thread_(false) {
+        capturing_(false) {
     auto good_sample_rate = [](int sr) {
       return sr == 8000 || sr == 16000 || sr == 32000 || sr == 44100 ||
              sr == 48000;
@@ -82,20 +85,17 @@ class TestAudioDeviceModuleImpl
   ~TestAudioDeviceModuleImpl() override {
     StopPlayout();
     StopRecording();
-    if (thread_) {
-      {
-        rtc::CritScope cs(&lock_);
-        stop_thread_ = true;
-      }
-      thread_->Stop();
-    }
   }
 
   int32_t Init() override {
-    thread_ = absl::make_unique<rtc::PlatformThread>(
-        TestAudioDeviceModuleImpl::Run, this, "TestAudioDeviceModuleImpl",
-        rtc::kHighPriority);
-    thread_->Start();
+    task_queue_ =
+        absl::make_unique<rtc::TaskQueue>(task_queue_factory_->CreateTaskQueue(
+            "TestAudioDeviceModuleImpl", TaskQueueFactory::Priority::NORMAL));
+
+    RepeatingTaskHandle::Start(task_queue_->Get(), [this]() {
+      ProcessAudio();
+      return TimeDelta::us(process_interval_us_);
+    });
     return 0;
   }
 
@@ -156,14 +156,7 @@ class TestAudioDeviceModuleImpl
 
  private:
   void ProcessAudio() {
-    int64_t time_us = rtc::TimeMicros();
-    bool logged_once = false;
-    for (;;) {
-      {
     rtc::CritScope cs(&lock_);
-        if (stop_thread_) {
-          return;
-        }
     if (capturing_) {
       // Capture 10ms of audio. 2 bytes per sample.
       const bool keep_capturing = capturer_->Capture(&recording_buffer_);
@@ -187,40 +180,17 @@ class TestAudioDeviceModuleImpl
       const int sampling_frequency = renderer_->SamplingFrequency();
       audio_callback_->NeedMorePlayData(
           SamplesPerFrame(sampling_frequency), 2 * renderer_->NumChannels(),
-              renderer_->NumChannels(), sampling_frequency,
-              playout_buffer_.data(), samples_out, &elapsed_time_ms,
-              &ntp_time_ms);
-          const bool keep_rendering =
-              renderer_->Render(rtc::ArrayView<const int16_t>(
-                  playout_buffer_.data(), samples_out));
+          renderer_->NumChannels(), sampling_frequency, playout_buffer_.data(),
+          samples_out, &elapsed_time_ms, &ntp_time_ms);
+      const bool keep_rendering = renderer_->Render(
+          rtc::ArrayView<const int16_t>(playout_buffer_.data(), samples_out));
       if (!keep_rendering) {
         rendering_ = false;
         done_rendering_.Set();
       }
     }
   }
-      time_us += process_interval_us_;
-
-      int64_t time_left_us = time_us - rtc::TimeMicros();
-      if (time_left_us < 0) {
-        if (!logged_once) {
-          RTC_LOG(LS_ERROR) << "ProcessAudio is too slow";
-          logged_once = true;
-        }
-      } else {
-        while (time_left_us > 1000) {
-          if (rtc::Thread::SleepMs(time_left_us / 1000))
-            break;
-          time_left_us = time_us - rtc::TimeMicros();
-        }
-      }
-    }
-  }
-
-  static void Run(void* obj) {
-    static_cast<TestAudioDeviceModuleImpl*>(obj)->ProcessAudio();
-  }
-
+  TaskQueueFactory* const task_queue_factory_;
   const std::unique_ptr<Capturer> capturer_ RTC_GUARDED_BY(lock_);
   const std::unique_ptr<Renderer> renderer_ RTC_GUARDED_BY(lock_);
   const int64_t process_interval_us_;
@@ -234,9 +204,7 @@ class TestAudioDeviceModuleImpl
 
   std::vector<int16_t> playout_buffer_ RTC_GUARDED_BY(lock_);
   rtc::BufferT<int16_t> recording_buffer_ RTC_GUARDED_BY(lock_);
-
-  std::unique_ptr<rtc::PlatformThread> thread_;
-  bool stop_thread_ RTC_GUARDED_BY(lock_);
+  std::unique_ptr<rtc::TaskQueue> task_queue_;
 };
 
 // A fake capturer that generates pulses with random samples between
@@ -494,8 +462,17 @@ TestAudioDeviceModule::CreateTestAudioDeviceModule(
     std::unique_ptr<Capturer> capturer,
     std::unique_ptr<Renderer> renderer,
     float speed) {
+  return Create(&GlobalTaskQueueFactory(), std::move(capturer),
+                std::move(renderer), speed);
+}
+
+rtc::scoped_refptr<TestAudioDeviceModule> TestAudioDeviceModule::Create(
+    TaskQueueFactory* task_queue_factory,
+    std::unique_ptr<TestAudioDeviceModule::Capturer> capturer,
+    std::unique_ptr<TestAudioDeviceModule::Renderer> renderer,
+    float speed) {
   return new rtc::RefCountedObject<TestAudioDeviceModuleImpl>(
-      std::move(capturer), std::move(renderer), speed);
+      task_queue_factory, std::move(capturer), std::move(renderer), speed);
 }
 
 std::unique_ptr<TestAudioDeviceModule::PulsedNoiseCapturer>

modules/audio_device/include/test_audio_device.h

@@ -17,6 +17,7 @@
 
 #include "api/array_view.h"
 #include "api/scoped_refptr.h"
+#include "api/task_queue/task_queue_factory.h"
 #include "modules/audio_device/include/audio_device.h"
 #include "modules/audio_device/include/audio_device_defines.h"
 #include "rtc_base/buffer.h"
@@ -82,6 +83,11 @@ class TestAudioDeviceModule : public AudioDeviceModule {
       std::unique_ptr<Capturer> capturer,
       std::unique_ptr<Renderer> renderer,
       float speed = 1);
+  static rtc::scoped_refptr<TestAudioDeviceModule> Create(
+      TaskQueueFactory* task_queue_factory,
+      std::unique_ptr<Capturer> capturer,
+      std::unique_ptr<Renderer> renderer,
+      float speed = 1);
 
   // Returns a Capturer instance that generates a signal of |num_channels|
   // channels where every second frame is zero and every second frame is evenly