Added a level indicator to new mixer.

webrtc/voice_engine/level_indicator.cc

 /*
  *  Copyright (c) 2012 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 "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/voice_engine/level_indicator.h"
 
 namespace webrtc {
 
 namespace voe {
 
 // Number of bars on the indicator.
 // Note that the number of elements is specified because we are indexing it
 // in the range of 0-32
-const int8_t permutation[33] =
-    {0,1,2,3,4,4,5,5,5,5,6,6,6,6,6,7,7,7,7,8,8,8,9,9,9,9,9,9,9,9,9,9,9};
-
+const int8_t permutation[33] = {0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6,
+                                6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8,
+                                9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9};
 
 AudioLevel::AudioLevel() :
     _absMax(0),
     _count(0),
     _currentLevel(0),
     _currentLevelFullRange(0) {
+  WebRtcSpl_Init();

[minyue-webrtc, 2016/08/15 06:26:15]

I think clang format made irrelevant changes to the CL and hard to discern the
actual change.

[aleloi, 2016/08/15 11:52:13]

Acknowledged.

[minyue-webrtc, 2016/08/15 15:58:37]

I think there are still too many lines of changes.

 }
 
 AudioLevel::~AudioLevel() {
 }
 
-void AudioLevel::Clear()
-{
-    rtc::CritScope cs(&_critSect);
-    _absMax = 0;
-    _count = 0;
-    _currentLevel = 0;
-    _currentLevelFullRange = 0;
+void AudioLevel::Clear() {
+  rtc::CritScope cs(&_critSect);
+  _absMax = 0;
+  _count = 0;
+  _currentLevel = 0;
+  _currentLevelFullRange = 0;
 }
 
-void AudioLevel::ComputeLevel(const AudioFrame& audioFrame)
-{
-    int16_t absValue(0);
+void AudioLevel::ComputeLevel(const AudioFrame& audioFrame) {
+  int16_t absValue(0);
 
-    // Check speech level (works for 2 channels as well)
-    absValue = WebRtcSpl_MaxAbsValueW16(
-        audioFrame.data_,
-        audioFrame.samples_per_channel_*audioFrame.num_channels_);
+  // Check speech level (works for 2 channels as well)
+  absValue = WebRtcSpl_MaxAbsValueW16(
+      audioFrame.data_,
+      audioFrame.samples_per_channel_ * audioFrame.num_channels_);
 
-    // Protect member access using a lock since this method is called on a
-    // dedicated audio thread in the RecordedDataIsAvailable() callback.
-    rtc::CritScope cs(&_critSect);
+  // Protect member access using a lock since this method is called on a
+  // dedicated audio thread in the RecordedDataIsAvailable() callback.
+  rtc::CritScope cs(&_critSect);
 
-    if (absValue > _absMax)
+  if (absValue > _absMax)
     _absMax = absValue;
 
     // Update level approximately 10 times per second
-    if (_count++ == kUpdateFrequency)
-    {
-        _currentLevelFullRange = _absMax;
+    if (_count++ == kUpdateFrequency) {
+      _currentLevelFullRange = _absMax;
 
-        _count = 0;
+      _count = 0;
 
-        // Highest value for a int16_t is 0x7fff = 32767
-        // Divide with 1000 to get in the range of 0-32 which is the range of
-        // the permutation vector
-        int32_t position = _absMax/1000;
+      // Highest value for a int16_t is 0x7fff = 32767
+      // Divide with 1000 to get in the range of 0-32 which is the range of
+      // the permutation vector
+      int32_t position = _absMax / 1000;
 
-        // Make it less likely that the bar stays at position 0. I.e. only if
-        // its in the range 0-250 (instead of 0-1000)
-        if ((position == 0) && (_absMax > 250))
-        {
-            position = 1;
-        }
-        _currentLevel = permutation[position];
+      // Make it less likely that the bar stays at position 0. I.e. only if
+      // its in the range 0-250 (instead of 0-1000)
+      if ((position == 0) && (_absMax > 250)) {
+        position = 1;
+      }
+      _currentLevel = permutation[position];
 
-        // Decay the absolute maximum (divide by 4)
-        _absMax >>= 2;
+      // Decay the absolute maximum (divide by 4)
+      _absMax >>= 2;
     }
 }
 
-int8_t AudioLevel::Level() const
-{
-    rtc::CritScope cs(&_critSect);
-    return _currentLevel;
+int8_t AudioLevel::Level() const {
+  rtc::CritScope cs(&_critSect);
+  return _currentLevel;
 }
 
-int16_t AudioLevel::LevelFullRange() const
-{
-    rtc::CritScope cs(&_critSect);
-    return _currentLevelFullRange;
+int16_t AudioLevel::LevelFullRange() const {
+  rtc::CritScope cs(&_critSect);
+  return _currentLevelFullRange;
 }
 
 }  // namespace voe
 
 }  // namespace webrtc