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

webrtc/modules/audio_coding/codecs/ilbc/decode.c

 /*
  *  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.
  */
 
@@ skipping 26 matching lines @@
  *---------------------------------------------------------------*/
 
 void WebRtcIlbcfix_DecodeImpl(
     int16_t *decblock,    /* (o) decoded signal block */
     const uint16_t *bytes, /* (i) encoded signal bits */
     IlbcDecoder *iLBCdec_inst, /* (i/o) the decoder state
                                            structure */
     int16_t mode      /* (i) 0: bad packet, PLC,
                                                                    1: normal */
                            ) {
-  int i;
+  size_t i;
   int16_t order_plus_one;
 
   int16_t last_bit;
   int16_t *data;
   /* Stack based */
   int16_t decresidual[BLOCKL_MAX];
   int16_t PLCresidual[BLOCKL_MAX + LPC_FILTERORDER];
   int16_t syntdenum[NSUB_MAX*(LPC_FILTERORDER+1)];
   int16_t PLClpc[LPC_FILTERORDER + 1];
 #ifndef WEBRTC_ARCH_BIG_ENDIAN
@@ skipping 41 matching lines @@
       WebRtcIlbcfix_DecoderInterpolateLsp(syntdenum, weightdenum,
                                           lsfdeq, LPC_FILTERORDER, iLBCdec_inst);
 
       /* Decode the residual using the cb and gain indexes */
       WebRtcIlbcfix_DecodeResidual(iLBCdec_inst, iLBCbits_inst, decresidual, syntdenum);
 
       /* preparing the plc for a future loss! */
       WebRtcIlbcfix_DoThePlc(
           PLCresidual, PLClpc, 0, decresidual,
           syntdenum + (LPC_FILTERORDER + 1) * (iLBCdec_inst->nsub - 1),
-          (int16_t)(iLBCdec_inst->last_lag), iLBCdec_inst);
+          iLBCdec_inst->last_lag, iLBCdec_inst);
 
       /* Use the output from doThePLC */
       WEBRTC_SPL_MEMCPY_W16(decresidual, PLCresidual, iLBCdec_inst->blockl);
     }
 
   }
 
   if (mode == 0) {
     /* the data is bad (either a PLC call
      * was made or a bit error was detected)
      */
 
     /* packet loss conceal */
 
     WebRtcIlbcfix_DoThePlc(PLCresidual, PLClpc, 1, decresidual, syntdenum,
-                           (int16_t)(iLBCdec_inst->last_lag), iLBCdec_inst);
+                           iLBCdec_inst->last_lag, iLBCdec_inst);
 
     WEBRTC_SPL_MEMCPY_W16(decresidual, PLCresidual, iLBCdec_inst->blockl);
 
     order_plus_one = LPC_FILTERORDER + 1;
 
     for (i = 0; i < iLBCdec_inst->nsub; i++) {
       WEBRTC_SPL_MEMCPY_W16(syntdenum+(i*order_plus_one),
                             PLClpc, order_plus_one);
     }
   }
@@ skipping 45 matching lines @@
             data+i*SUBL, data+i*SUBL,
             syntdenum+(i-2)*(LPC_FILTERORDER+1),
             LPC_FILTERORDER+1, SUBL);
       }
     }
 
     /* Save the filter state */
     WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->syntMem, &data[iLBCdec_inst->blockl-LPC_FILTERORDER], LPC_FILTERORDER);
 
   } else { /* Enhancer not activated */
-    int16_t lag;
+    size_t lag;
 
     /* Find last lag (since the enhancer is not called to give this info) */
     lag = 20;
     if (iLBCdec_inst->mode==20) {
-      lag = (int16_t)WebRtcIlbcfix_XcorrCoef(
+      lag = WebRtcIlbcfix_XcorrCoef(
           &decresidual[iLBCdec_inst->blockl-60],
           &decresidual[iLBCdec_inst->blockl-60-lag],
           60,
           80, lag, -1);
     } else {
-      lag = (int16_t)WebRtcIlbcfix_XcorrCoef(
+      lag = WebRtcIlbcfix_XcorrCoef(
           &decresidual[iLBCdec_inst->blockl-ENH_BLOCKL],
           &decresidual[iLBCdec_inst->blockl-ENH_BLOCKL-lag],
           ENH_BLOCKL,
           100, lag, -1);
     }
 
     /* Store lag (it is needed if next packet is lost) */
     (*iLBCdec_inst).last_lag = lag;
 
     /* copy data and run synthesis filter */
@@ skipping 22 matching lines @@
 
   WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->old_syntdenum,
                         syntdenum, iLBCdec_inst->nsub*(LPC_FILTERORDER+1));
 
   iLBCdec_inst->prev_enh_pl=0;
 
   if (mode==0) { /* PLC was used */
     iLBCdec_inst->prev_enh_pl=1;
   }
 }