Prepare to convert various types to size_t.

webrtc/modules/audio_coding/codecs/isac/fix/source/lattice.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 261 matching lines @@
     for (i=0;i<HALF_SUBFRAMELEN;i++)
     {
 
       tmp32 = lat_inQ25[i + temp1] << 1;  // Q25->Q26
       tmp32 = WEBRTC_SPL_MUL_16_32_RSFT16(inv_gain16, tmp32); //lat_in[]*inv_gain in (Q(18-sh)*Q26)>>16 = Q(28-sh)
       tmp32 = WEBRTC_SPL_SHIFT_W32(tmp32, -(28-sh)); // lat_in[]*inv_gain in Q0
 
       ARfQ0vec[i] = (int16_t)WebRtcSpl_SatW32ToW16(tmp32); // Q0
     }
 
-    for (i=orderCoef-1;i>=0;i--) //get the state of f&g for the first input, for all orders
+    for (i=orderCoef;i>0;i--) //get the state of f&g for the first input, for all orders
     {
-      tmp32 = (cthQ15[i] * ARfQ0vec[0] - sthQ15[i] * stateGQ0[i] + 16384) >> 15;
+      tmp32 = (cthQ15[i - 1] * ARfQ0vec[0] - sthQ15[i - 1] * stateGQ0[i - 1] +
+               16384) >> 15;
       tmpAR = (int16_t)WebRtcSpl_SatW32ToW16(tmp32); // Q0
 
-      tmp32 = (sthQ15[i] * ARfQ0vec[0] + cthQ15[i] * stateGQ0[i] + 16384) >> 15;
-      ARgQ0vec[i+1] = (int16_t)WebRtcSpl_SatW32ToW16(tmp32); // Q0
+      tmp32 = (sthQ15[i - 1] * ARfQ0vec[0] + cthQ15[i - 1] * stateGQ0[i - 1] +
+               16384) >> 15;
+      ARgQ0vec[i] = (int16_t)WebRtcSpl_SatW32ToW16(tmp32); // Q0
       ARfQ0vec[0] = tmpAR;
     }
     ARgQ0vec[0] = ARfQ0vec[0];
 
     // Filter ARgQ0vec[] and ARfQ0vec[] through coefficients cthQ15[] and sthQ15[].
     WebRtcIsacfix_FilterArLoop(ARgQ0vec, ARfQ0vec, cthQ15, sthQ15, orderCoef);
 
     for(n=0;n<HALF_SUBFRAMELEN;n++)
     {
       lat_outQ0[n + temp1] = ARfQ0vec[n];
     }
 
 
     /* cannot use memcpy in the following */
 
     for (i=0;i<ord_1;i++)
     {
       stateGQ0[i] = ARgQ0vec[i];
     }
   }
 
   return;
 }