Replace NULL with nullptr in all C++ files.

webrtc/voice_engine/output_mixer.cc

Index: webrtc/voice_engine/output_mixer.cc
diff --git a/webrtc/voice_engine/output_mixer.cc b/webrtc/voice_engine/output_mixer.cc
index 61babd2750b363b4a04793531bb898dd835cf3ba..aa73ae6137f308ac608d801198684ef2c737acb0 100644
--- a/webrtc/voice_engine/output_mixer.cc
+++ b/webrtc/voice_engine/output_mixer.cc
@@ -80,36 +80,33 @@ OutputMixer::Create(OutputMixer*& mixer, uint32_t instanceId)
     WEBRTC_TRACE(kTraceMemory, kTraceVoice, instanceId,
                  "OutputMixer::Create(instanceId=%d)", instanceId);
     mixer = new OutputMixer(instanceId);
-    if (mixer == NULL)
-    {
-        WEBRTC_TRACE(kTraceMemory, kTraceVoice, instanceId,
-                     "OutputMixer::Create() unable to allocate memory for"
-                     "mixer");
-        return -1;
+    if (mixer == nullptr) {
+      WEBRTC_TRACE(kTraceMemory, kTraceVoice, instanceId,
+                   "OutputMixer::Create() unable to allocate memory for"
+                   "mixer");
+      return -1;
     }
     return 0;
 }
 
-OutputMixer::OutputMixer(uint32_t instanceId) :
-    _mixerModule(*AudioConferenceMixer::Create(instanceId)),
-    _audioLevel(),
-    _instanceId(instanceId),
-    _externalMediaCallbackPtr(NULL),
-    _externalMedia(false),
-    _panLeft(1.0f),
-    _panRight(1.0f),
-    _mixingFrequencyHz(8000),
-    _outputFileRecording(false)
-{
-    WEBRTC_TRACE(kTraceMemory, kTraceVoice, VoEId(_instanceId,-1),
-                 "OutputMixer::OutputMixer() - ctor");
-
-    if (_mixerModule.RegisterMixedStreamCallback(this) == -1)
-    {
-        WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId,-1),
-                     "OutputMixer::OutputMixer() failed to register mixer"
-                     "callbacks");
-    }
+OutputMixer::OutputMixer(uint32_t instanceId)
+    : _mixerModule(*AudioConferenceMixer::Create(instanceId)),
+      _audioLevel(),
+      _instanceId(instanceId),
+      _externalMediaCallbackPtr(nullptr),
+      _externalMedia(false),
+      _panLeft(1.0f),
+      _panRight(1.0f),
+      _mixingFrequencyHz(8000),
+      _outputFileRecording(false) {
+  WEBRTC_TRACE(kTraceMemory, kTraceVoice, VoEId(_instanceId, -1),
+               "OutputMixer::OutputMixer() - ctor");
+
+  if (_mixerModule.RegisterMixedStreamCallback(this) == -1) {
+    WEBRTC_TRACE(kTraceError, kTraceVoice, VoEId(_instanceId, -1),
+                 "OutputMixer::OutputMixer() failed to register mixer"
+                 "callbacks");
+  }
 }
 
 void
@@ -118,7 +115,7 @@ OutputMixer::Destroy(OutputMixer*& mixer)
     if (mixer)
     {
         delete mixer;
-        mixer = NULL;
+        mixer = nullptr;
     }
 }
 
@@ -133,7 +130,7 @@ OutputMixer::~OutputMixer()
     {
         rtc::CritScope cs(&_fileCritSect);
         if (output_file_recorder_) {
-          output_file_recorder_->RegisterModuleFileCallback(NULL);
+          output_file_recorder_->RegisterModuleFileCallback(nullptr);
           output_file_recorder_->StopRecording();
         }
     }
@@ -180,7 +177,7 @@ int OutputMixer::DeRegisterExternalMediaProcessing()
 
     rtc::CritScope cs(&_callbackCritSect);
     _externalMedia = false;
-    _externalMediaCallbackPtr = NULL;
+    _externalMediaCallbackPtr = nullptr;
 
     return 0;
 }
@@ -264,18 +261,16 @@ int OutputMixer::StartRecordingPlayout(const char* fileName,
     const uint32_t notificationTime(0);
     CodecInst dummyCodec={100,"L16",16000,320,1,320000};
 
-    if ((codecInst != NULL) &&
-      ((codecInst->channels < 1) || (codecInst->channels > 2)))
-    {
-        _engineStatisticsPtr->SetLastError(
-            VE_BAD_ARGUMENT, kTraceError,
-            "StartRecordingPlayout() invalid compression");
-        return(-1);
+    if ((codecInst != nullptr) &&
+        ((codecInst->channels < 1) || (codecInst->channels > 2))) {
+      _engineStatisticsPtr->SetLastError(
+          VE_BAD_ARGUMENT, kTraceError,
+          "StartRecordingPlayout() invalid compression");
+      return (-1);
     }
-    if(codecInst == NULL)
-    {
-        format = kFileFormatPcm16kHzFile;
-        codecInst=&dummyCodec;
+    if (codecInst == nullptr) {
+      format = kFileFormatPcm16kHzFile;
+      codecInst = &dummyCodec;
     }
     else if((STR_CASE_CMP(codecInst->plname,"L16") == 0) ||
         (STR_CASE_CMP(codecInst->plname,"PCMU") == 0) ||
@@ -292,7 +287,7 @@ int OutputMixer::StartRecordingPlayout(const char* fileName,
 
     // Destroy the old instance
     if (output_file_recorder_) {
-      output_file_recorder_->RegisterModuleFileCallback(NULL);
+      output_file_recorder_->RegisterModuleFileCallback(nullptr);
       output_file_recorder_.reset();
     }
 
@@ -337,17 +332,15 @@ int OutputMixer::StartRecordingPlayout(OutStream* stream,
     const uint32_t notificationTime(0);
     CodecInst dummyCodec={100,"L16",16000,320,1,320000};
 
-    if (codecInst != NULL && codecInst->channels != 1)
-    {
-        _engineStatisticsPtr->SetLastError(
-            VE_BAD_ARGUMENT, kTraceError,
-            "StartRecordingPlayout() invalid compression");
-        return(-1);
+    if (codecInst != nullptr && codecInst->channels != 1) {
+      _engineStatisticsPtr->SetLastError(
+          VE_BAD_ARGUMENT, kTraceError,
+          "StartRecordingPlayout() invalid compression");
+      return (-1);
     }
-    if(codecInst == NULL)
-    {
-        format = kFileFormatPcm16kHzFile;
-        codecInst=&dummyCodec;
+    if (codecInst == nullptr) {
+      format = kFileFormatPcm16kHzFile;
+      codecInst = &dummyCodec;
     }
     else if((STR_CASE_CMP(codecInst->plname,"L16") == 0) ||
         (STR_CASE_CMP(codecInst->plname,"PCMU") == 0) ||
@@ -364,7 +357,7 @@ int OutputMixer::StartRecordingPlayout(OutStream* stream,
 
     // Destroy the old instance
     if (output_file_recorder_) {
-      output_file_recorder_->RegisterModuleFileCallback(NULL);
+      output_file_recorder_->RegisterModuleFileCallback(nullptr);
       output_file_recorder_.reset();
     }
 
@@ -413,7 +406,7 @@ int OutputMixer::StopRecordingPlayout()
           "StopRecording(), could not stop recording");
       return -1;
     }
-    output_file_recorder_->RegisterModuleFileCallback(NULL);
+    output_file_recorder_->RegisterModuleFileCallback(nullptr);
     output_file_recorder_.reset();
     _outputFileRecording = false;