Adding WebRTC Auto Gain Control Test (linux)

media/audio/fake_audio_input_stream.cc

 // Copyright (c) 2012 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 "media/audio/fake_audio_input_stream.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file.h"
 #include "base/lazy_instance.h"
@@ skipping 197 matching lines @@
   wav_file_data_ = ReadWavFile(wav_filename, &file_length);
   wav_audio_handler_ = CreateWavAudioHandler(
       wav_filename, wav_file_data_.get(), file_length, params_);
 }
 
 bool FakeAudioInputStream::PlayingFromFile() {
   return wav_audio_handler_.get() != nullptr;
 }
 
 void FakeAudioInputStream::PlayFileLooping() {
+  // TODO(phoglund): reinstate looping/make optional after wrapping up AGC test.
+  if (wav_audio_handler_->AtEnd(wav_file_read_pos_))
+    //wav_file_read_pos_ = 0;
+    return;
+
   // Unfilled frames will be zeroed by CopyTo.
   size_t bytes_written;
   wav_audio_handler_->CopyTo(audio_bus_.get(), wav_file_read_pos_,
                              &bytes_written);
   wav_file_read_pos_ += bytes_written;
-  if (wav_audio_handler_->AtEnd(wav_file_read_pos_))
-    wav_file_read_pos_ = 0;
   callback_->OnData(this, audio_bus_.get(), buffer_size_, 1.0);
 }
 
 void FakeAudioInputStream::PlayBeep() {
   // Accumulate the time from the last beep.
   interval_from_last_beep_ += TimeTicks::Now() - last_callback_time_;
 
   memset(buffer_.get(), 0, buffer_size_);
   bool should_beep = false;
   {
@@ skipping 78 matching lines @@
   return false;
 }
 
 // static
 void FakeAudioInputStream::BeepOnce() {
   BeepContext* beep_context = g_beep_context.Pointer();
   beep_context->SetBeepOnce(true);
 }
 
 }  // namespace media