libwebp-0.5.2-rc2

third_party/libwebp/dsp/enc.c

 // Copyright 2011 Google Inc. All Rights Reserved.
 //
 // Use of this source code is governed by a BSD-style license
 // that can be found in the COPYING 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.
 // -----------------------------------------------------------------------------
 //
 // Speed-critical encoding functions.
@@ skipping 317 matching lines @@
   DCMode(I16DC16 + dst, left, top, 16, 16, 5);
   VerticalPred(I16VE16 + dst, top, 16);
   HorizontalPred(I16HE16 + dst, left, 16);
   TrueMotion(I16TM16 + dst, left, top, 16);
 }
 
 //------------------------------------------------------------------------------
 // luma 4x4 prediction
 
 #define DST(x, y) dst[(x) + (y) * BPS]
-#define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2)
+#define AVG3(a, b, c) ((uint8_t)(((a) + 2 * (b) + (c) + 2) >> 2))
 #define AVG2(a, b) (((a) + (b) + 1) >> 1)
 
 static void VE4(uint8_t* dst, const uint8_t* top) {    // vertical
   const uint8_t vals[4] = {
     AVG3(top[-1], top[0], top[1]),
     AVG3(top[ 0], top[1], top[2]),
     AVG3(top[ 1], top[2], top[3]),
     AVG3(top[ 2], top[3], top[4])
   };
   int i;
@@ skipping 505 matching lines @@
     }
 #endif
 #if defined(WEBP_USE_MIPS_DSP_R2)
     if (VP8GetCPUInfo(kMIPSdspR2)) {
       VP8EncDspInitMIPSdspR2();
     }
 #endif
   }
   enc_last_cpuinfo_used = VP8GetCPUInfo;
 }