Update a ton of audio code to use size_t more correctly and in general reduce

webrtc/common_audio/signal_processing/resample_by_2.c

 /*
  *  Copyright (c) 2011 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.
  */
 
@@ skipping 49 matching lines @@
 
 // Multiply a 32-bit value with a 16-bit value and accumulate to another input:
 #define MUL_ACCUM_1(a, b, c) WEBRTC_SPL_SCALEDIFF32(a, b, c)
 #define MUL_ACCUM_2(a, b, c) WEBRTC_SPL_SCALEDIFF32(a, b, c)
 
 #endif  // WEBRTC_ARCH_ARM_V7
 
 
 // decimator
 #if !defined(MIPS32_LE)
-void WebRtcSpl_DownsampleBy2(const int16_t* in, int len,
+void WebRtcSpl_DownsampleBy2(const int16_t* in, size_t len,
                              int16_t* out, int32_t* filtState) {
   int32_t tmp1, tmp2, diff, in32, out32;
-  int i;
+  size_t i;
 
   register int32_t state0 = filtState[0];
   register int32_t state1 = filtState[1];
   register int32_t state2 = filtState[2];
   register int32_t state3 = filtState[3];
   register int32_t state4 = filtState[4];
   register int32_t state5 = filtState[5];
   register int32_t state6 = filtState[6];
   register int32_t state7 = filtState[7];
 
@@ skipping 34 matching lines @@
   filtState[2] = state2;
   filtState[3] = state3;
   filtState[4] = state4;
   filtState[5] = state5;
   filtState[6] = state6;
   filtState[7] = state7;
 }
 #endif  // #if defined(MIPS32_LE)
 
 
-void WebRtcSpl_UpsampleBy2(const int16_t* in, int len,
+void WebRtcSpl_UpsampleBy2(const int16_t* in, size_t len,
                            int16_t* out, int32_t* filtState) {
   int32_t tmp1, tmp2, diff, in32, out32;
-  int i;
+  size_t i;
 
   register int32_t state0 = filtState[0];
   register int32_t state1 = filtState[1];
   register int32_t state2 = filtState[2];
   register int32_t state3 = filtState[3];
   register int32_t state4 = filtState[4];
   register int32_t state5 = filtState[5];
   register int32_t state6 = filtState[6];
   register int32_t state7 = filtState[7];
 
@@ skipping 32 matching lines @@
 
   filtState[0] = state0;
   filtState[1] = state1;
   filtState[2] = state2;
   filtState[3] = state3;
   filtState[4] = state4;
   filtState[5] = state5;
   filtState[6] = state6;
   filtState[7] = state7;
 }