Adding WebRTC Auto Gain Control Test (linux)

chrome/browser/media/webrtc_browsertest_audio.h

+// 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.
+
+#ifndef CHROME_BROWSER_MEDIA_WEBRTC_BROWSERTEST_AUDIO_H_
+#define CHROME_BROWSER_MEDIA_WEBRTC_BROWSERTEST_AUDIO_H_
+
+#include <vector>
+
+namespace base {
+class FilePath;
+}
+
+namespace media {
+class AudioParameters;
+}
+
+namespace test {
+
+// Computes the average power of the audio signal seen over the entire file.
+//
+// The |file_parameters| pointer is filled with a copy of the audio file's
+// parameters as deduced by wav_audio_handler.h (i.e. what's in the header).
+//
+// Returns a audio dBFS (decibels relative to full-scale) value.
+// See media/audio/audio_power_monitor.h for more details.
+float ComputeAudioEnergyForWavFile(const base::FilePath& wav_file_path,
+                                   media::AudioParameters* file_parameters);
+
+}  // namespace test
+
+#endif  // CHROME_BROWSER_MEDIA_WEBRTC_BROWSERTEST_AUDIO_H_