Replace NULL with nullptr or null in webrtc/audio/ and common_audio/.

webrtc/common_audio/vad/vad_core_unittest.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 <stdlib.h>
 
 #include "webrtc/common_audio/vad/vad_unittest.h"
 #include "webrtc/test/gtest.h"
 #include "webrtc/typedefs.h"
 
 extern "C" {
 #include "webrtc/common_audio/vad/vad_core.h"
 }
 
 namespace {
 
 TEST_F(VadTest, InitCore) {
   // Test WebRtcVad_InitCore().
   VadInstT* self = reinterpret_cast<VadInstT*>(malloc(sizeof(VadInstT)));
 
-  // NULL pointer test.
-  EXPECT_EQ(-1, WebRtcVad_InitCore(NULL));
+  // null pointer test.
+  EXPECT_EQ(-1, WebRtcVad_InitCore(nullptr));
 
-  // Verify return = 0 for non-NULL pointer.
+  // Verify return = 0 for non-null pointer.
   EXPECT_EQ(0, WebRtcVad_InitCore(self));
   // Verify init_flag is set.
   EXPECT_EQ(42, self->init_flag);
 
   free(self);
 }
 
 TEST_F(VadTest, set_mode_core) {
   VadInstT* self = reinterpret_cast<VadInstT*>(malloc(sizeof(VadInstT)));
 
-  // TODO(bjornv): Add NULL pointer check if we take care of it in
+  // TODO(bjornv): Add null pointer check if we take care of it in
   // vad_core.c
 
   ASSERT_EQ(0, WebRtcVad_InitCore(self));
   // Test WebRtcVad_set_mode_core().
   // Invalid modes should return -1.
   EXPECT_EQ(-1, WebRtcVad_set_mode_core(self, -1));
   EXPECT_EQ(-1, WebRtcVad_set_mode_core(self, 1000));
   // Valid modes should return 0.
   for (size_t j = 0; j < kModesSize; ++j) {
     EXPECT_EQ(0, WebRtcVad_set_mode_core(self, kModes[j]));
   }
 
   free(self);
 }
 
 TEST_F(VadTest, CalcVad) {
   VadInstT* self = reinterpret_cast<VadInstT*>(malloc(sizeof(VadInstT)));
   int16_t speech[kMaxFrameLength];
 
-  // TODO(bjornv): Add NULL pointer check if we take care of it in
+  // TODO(bjornv): Add null pointer check if we take care of it in
   // vad_core.c
 
   // Test WebRtcVad_CalcVadXXkhz()
   // Verify that all zeros in gives VAD = 0 out.
   memset(speech, 0, sizeof(speech));
   ASSERT_EQ(0, WebRtcVad_InitCore(self));
   for (size_t j = 0; j < kFrameLengthsSize; ++j) {
     if (ValidRatesAndFrameLengths(8000, kFrameLengths[j])) {
       EXPECT_EQ(0, WebRtcVad_CalcVad8khz(self, speech, kFrameLengths[j]));
     }
@@ skipping 24 matching lines @@
       EXPECT_EQ(1, WebRtcVad_CalcVad32khz(self, speech, kFrameLengths[j]));
     }
     if (ValidRatesAndFrameLengths(48000, kFrameLengths[j])) {
       EXPECT_EQ(1, WebRtcVad_CalcVad48khz(self, speech, kFrameLengths[j]));
     }
   }
 
   free(self);
 }
 }  // namespace