Add mute state field to AudioFrame.

webrtc/modules/audio_mixer/audio_frame_manipulator_unittest.cc

 /*
  *  Copyright (c) 2016 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 <algorithm>
 
 #include "webrtc/modules/audio_mixer/audio_frame_manipulator.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
 namespace {
 
 void FillFrameWithConstants(size_t samples_per_channel,
                             size_t number_of_channels,
                             int16_t value,
                             AudioFrame* frame) {
   frame->num_channels_ = number_of_channels;
   frame->samples_per_channel_ = samples_per_channel;
-  std::fill(frame->data_,
-            frame->data_ + samples_per_channel * number_of_channels, value);
+  int16_t* frame_data = frame->mutable_data();
+  std::fill(frame_data,
+            frame_data + samples_per_channel * number_of_channels, value);
 }
 }  // namespace
 
 TEST(AudioFrameManipulator, CompareForwardRampWithExpectedResultStereo) {
   constexpr int kSamplesPerChannel = 5;
   constexpr int kNumberOfChannels = 2;
 
   // Create a frame with values 5, 5, 5, ... and channels & samples as above.
   AudioFrame frame;
   FillFrameWithConstants(kSamplesPerChannel, kNumberOfChannels, 5, &frame);
 
   Ramp(0.0f, 1.0f, &frame);
 
   const int total_samples = kSamplesPerChannel * kNumberOfChannels;
   const int16_t expected_result[total_samples] = {0, 0, 1, 1, 2, 2, 3, 3, 4, 4};
+  const int16_t* frame_data = frame.data();
   EXPECT_TRUE(
-      std::equal(frame.data_, frame.data_ + total_samples, expected_result));
+      std::equal(frame_data, frame_data + total_samples, expected_result));
 }
 
 TEST(AudioFrameManipulator, CompareBackwardRampWithExpectedResultMono) {
   constexpr int kSamplesPerChannel = 5;
   constexpr int kNumberOfChannels = 1;
 
   // Create a frame with values 5, 5, 5, ... and channels & samples as above.
   AudioFrame frame;
   FillFrameWithConstants(kSamplesPerChannel, kNumberOfChannels, 5, &frame);
 
   Ramp(1.0f, 0.0f, &frame);
 
   const int total_samples = kSamplesPerChannel * kNumberOfChannels;
   const int16_t expected_result[total_samples] = {5, 4, 3, 2, 1};
+  const int16_t* frame_data = frame.data();
   EXPECT_TRUE(
-      std::equal(frame.data_, frame.data_ + total_samples, expected_result));
+      std::equal(frame_data, frame_data + total_samples, expected_result));
 }
 
 }  // namespace webrtc