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

webrtc/common_audio/signal_processing/downsample_fast_neon.c

 /*
  *  Copyright (c) 2014 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 <arm_neon.h>
 
 // NEON intrinsics version of WebRtcSpl_DownsampleFast()
 // for ARM 32-bit/64-bit platforms.
 int WebRtcSpl_DownsampleFastNeon(const int16_t* data_in,
-                                 int data_in_length,
+                                 size_t data_in_length,
                                  int16_t* data_out,
-                                 int data_out_length,
+                                 size_t data_out_length,
                                  const int16_t* __restrict coefficients,
-                                 int coefficients_length,
+                                 size_t coefficients_length,
                                  int factor,
-                                 int delay) {
-  int i = 0;
-  int j = 0;
+                                 size_t delay) {
+  size_t i = 0;
+  size_t j = 0;
   int32_t out_s32 = 0;
-  int endpos = delay + factor * (data_out_length - 1) + 1;
-  int res = data_out_length & 0x7;
-  int endpos1 = endpos - factor * res;
+  size_t endpos = delay + factor * (data_out_length - 1) + 1;
+  size_t res = data_out_length & 0x7;
+  size_t endpos1 = endpos - factor * res;
 
   // Return error if any of the running conditions doesn't meet.
-  if (data_out_length <= 0 || coefficients_length <= 0
+  if (data_out_length == 0 || coefficients_length == 0
                            || data_in_length < endpos) {
     return -1;
   }
 
   // First part, unroll the loop 8 times, with 3 subcases
   // (factor == 2, 4, others).
   switch (factor) {
     case 2: {
       for (i = delay; i < endpos1; i += 16) {
         // Round value, 0.5 in Q12.
@@ skipping 164 matching lines @@
       out_s32 = WebRtc_MulAccumW16(coefficients[j], data_in[i - j], out_s32);
     }
 
     // Saturate and store the output.
     out_s32 >>= 12;
     *data_out++ = WebRtcSpl_SatW32ToW16(out_s32);
   }
 
   return 0;
 }