Update audio code to use size_t more correctly, webrtc/common_audio/ portion.

webrtc/common_audio/vad/vad_sp_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 "testing/gtest/include/gtest/gtest.h"
 #include "webrtc/common_audio/vad/vad_unittest.h"
 #include "webrtc/typedefs.h"
 
 extern "C" {
 #include "webrtc/common_audio/vad/vad_core.h"
 #include "webrtc/common_audio/vad/vad_sp.h"
 }
 
 namespace {
 
 TEST_F(VadTest, vad_sp) {
   VadInstT* self = reinterpret_cast<VadInstT*>(malloc(sizeof(VadInstT)));
-  const int kMaxFrameLenSp = 960;  // Maximum frame length in this unittest.
+  const size_t kMaxFrameLenSp = 960;  // Maximum frame length in this unittest.
   int16_t zeros[kMaxFrameLenSp] = { 0 };
   int32_t state[2] = { 0 };
   int16_t data_in[kMaxFrameLenSp];
   int16_t data_out[kMaxFrameLenSp];
 
   // We expect the first value to be 1600 as long as |frame_counter| is zero,
   // which is true for the first iteration.
   static const int16_t kReferenceMin[32] = {
       1600, 720, 509, 512, 532, 552, 570, 588,
        606, 624, 642, 659, 675, 691, 707, 723,
       1600, 544, 502, 522, 542, 561, 579, 597,
        615, 633, 651, 667, 683, 699, 715, 731
   };
 
   // Construct a speech signal that will trigger the VAD in all modes. It is
   // known that (i * i) will wrap around, but that doesn't matter in this case.
-  for (int16_t i = 0; i < kMaxFrameLenSp; ++i) {
+  for (size_t i = 0; i < kMaxFrameLenSp; ++i) {
     data_in[i] = static_cast<int16_t>(i * i);
   }
   // Input values all zeros, expect all zeros out.
   WebRtcVad_Downsampling(zeros, data_out, state, kMaxFrameLenSp);
   EXPECT_EQ(0, state[0]);
   EXPECT_EQ(0, state[1]);
-  for (int16_t i = 0; i < kMaxFrameLenSp / 2; ++i) {
+  for (size_t i = 0; i < kMaxFrameLenSp / 2; ++i) {
     EXPECT_EQ(0, data_out[i]);
   }
   // Make a simple non-zero data test.
   WebRtcVad_Downsampling(data_in, data_out, state, kMaxFrameLenSp);
   EXPECT_EQ(207, state[0]);
   EXPECT_EQ(2270, state[1]);
 
   ASSERT_EQ(0, WebRtcVad_InitCore(self));
   // TODO(bjornv): Replace this part of the test with taking values from an
   // array and calculate the reference value here. Make sure the values are not
   // ordered.
   for (int16_t i = 0; i < 16; ++i) {
     int16_t value = 500 * (i + 1);
     for (int j = 0; j < kNumChannels; ++j) {
       // Use values both above and below initialized value.
       EXPECT_EQ(kReferenceMin[i], WebRtcVad_FindMinimum(self, value, j));
       EXPECT_EQ(kReferenceMin[i + 16], WebRtcVad_FindMinimum(self, 12000, j));
     }
     self->frame_counter++;
   }
 
   free(self);
 }
 }  // namespace