libwebp-0.6.0-rc1

third_party/libwebp/utils/random.h

Index: third_party/libwebp/utils/random.h
diff --git a/third_party/libwebp/utils/random.h b/third_party/libwebp/utils/random.h
deleted file mode 100644
index c392a615caf947cdc9913bd92175e6b4ec38b118..0000000000000000000000000000000000000000
--- a/third_party/libwebp/utils/random.h
+++ /dev/null
@@ -1,63 +0,0 @@
-// Copyright 2013 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.
-// -----------------------------------------------------------------------------
-//
-// Pseudo-random utilities
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#ifndef WEBP_UTILS_RANDOM_H_
-#define WEBP_UTILS_RANDOM_H_
-
-#include <assert.h>
-#include "../webp/types.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define VP8_RANDOM_DITHER_FIX 8   // fixed-point precision for dithering
-#define VP8_RANDOM_TABLE_SIZE 55
-
-typedef struct {
-  int index1_, index2_;
-  uint32_t tab_[VP8_RANDOM_TABLE_SIZE];
-  int amp_;
-} VP8Random;
-
-// Initializes random generator with an amplitude 'dithering' in range [0..1].
-void VP8InitRandom(VP8Random* const rg, float dithering);
-
-// Returns a centered pseudo-random number with 'num_bits' amplitude.
-// (uses D.Knuth's Difference-based random generator).
-// 'amp' is in VP8_RANDOM_DITHER_FIX fixed-point precision.
-static WEBP_INLINE int VP8RandomBits2(VP8Random* const rg, int num_bits,
-                                      int amp) {
-  int diff;
-  assert(num_bits + VP8_RANDOM_DITHER_FIX <= 31);
-  diff = rg->tab_[rg->index1_] - rg->tab_[rg->index2_];
-  if (diff < 0) diff += (1u << 31);
-  rg->tab_[rg->index1_] = diff;
-  if (++rg->index1_ == VP8_RANDOM_TABLE_SIZE) rg->index1_ = 0;
-  if (++rg->index2_ == VP8_RANDOM_TABLE_SIZE) rg->index2_ = 0;
-  // sign-extend, 0-center
-  diff = (int)((uint32_t)diff << 1) >> (32 - num_bits);
-  diff = (diff * amp) >> VP8_RANDOM_DITHER_FIX;  // restrict range
-  diff += 1 << (num_bits - 1);                   // shift back to 0.5-center
-  return diff;
-}
-
-static WEBP_INLINE int VP8RandomBits(VP8Random* const rg, int num_bits) {
-  return VP8RandomBits2(rg, num_bits, rg->amp_);
-}
-
-#ifdef __cplusplus
-}    // extern "C"
-#endif
-
-#endif  /* WEBP_UTILS_RANDOM_H_ */