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

webrtc/common_audio/signal_processing/downsample_fast_mips.c

 /*
  *  Copyright (c) 2013 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"
 
 // Version of WebRtcSpl_DownsampleFast() for MIPS platforms.
 int WebRtcSpl_DownsampleFast_mips(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) {
+                                  size_t delay) {
   int i;
   int j;
   int k;
   int32_t out_s32 = 0;
-  int endpos = delay + factor * (data_out_length - 1) + 1;
+  size_t endpos = delay + factor * (data_out_length - 1) + 1;
 
   int32_t  tmp1, tmp2, tmp3, tmp4, factor_2;
   int16_t* p_coefficients;
   int16_t* p_data_in;
   int16_t* p_data_in_0 = (int16_t*)&data_in[delay];
   int16_t* p_coefficients_0 = (int16_t*)&coefficients[0];
 #if !defined(MIPS_DSP_R1_LE)
   int32_t max_16 = 0x7FFF;
   int32_t min_16 = 0xFFFF8000;
 #endif  // #if !defined(MIPS_DSP_R1_LE)
 
   // 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;
   }
 #if defined(MIPS_DSP_R2_LE)
   __asm __volatile (
     ".set        push                                                \n\t"
     ".set        noreorder                                           \n\t"
     "subu        %[i],            %[endpos],       %[delay]          \n\t"
     "sll         %[factor_2],     %[factor],       1                 \n\t"
    "1:                                                               \n\t"
@@ skipping 110 matching lines @@
       [p_coefs_0] "r" (p_coefficients_0), [endpos] "r" (endpos),
 #if !defined(MIPS_DSP_R1_LE)
       [max_16] "r" (max_16), [min_16] "r" (min_16),
 #endif  // #if !defined(MIPS_DSP_R1_LE)
       [delay] "r" (delay), [factor] "r" (factor)
     : "memory", "hi", "lo"
   );
 #endif  // #if defined(MIPS_DSP_R2_LE)
   return 0;
 }