Update libwebp to version 1.0.2

This resolves #939.

11 files changed, 30 insertions, 24 deletions

diff --git a/media/libwebp/utils/bit_reader_inl_utils.h b/media/libwebp/utils/bit_reader_inl_utils.h
index 2bb9a1918..8d1249ef9 100644
--- a/media/libwebp/utils/bit_reader_inl_utils.h
+++ b/media/libwebp/utils/bit_reader_inl_utils.h
@@ -187,4 +187,4 @@ static WEBP_INLINE int VP8GetBitAlt(VP8BitReader* const br, int prob) {
 }    // extern "C"
 #endif
 
-#endif   // WEBP_UTILS_BIT_READER_INL_UTILS_H_
+#endif  // WEBP_UTILS_BIT_READER_INL_UTILS_H_
diff --git a/media/libwebp/utils/bit_reader_utils.h b/media/libwebp/utils/bit_reader_utils.h
index 53e9db6ad..377a7821a 100644
--- a/media/libwebp/utils/bit_reader_utils.h
+++ b/media/libwebp/utils/bit_reader_utils.h
@@ -172,4 +172,4 @@ static WEBP_INLINE void VP8LFillBitWindow(VP8LBitReader* const br) {
 }    // extern "C"
 #endif
 
-#endif  /* WEBP_UTILS_BIT_READER_UTILS_H_ */
+#endif  // WEBP_UTILS_BIT_READER_UTILS_H_
diff --git a/media/libwebp/utils/bit_writer_utils.h b/media/libwebp/utils/bit_writer_utils.h
index 9e9c2b729..b854fae73 100644
--- a/media/libwebp/utils/bit_writer_utils.h
+++ b/media/libwebp/utils/bit_writer_utils.h
@@ -151,4 +151,4 @@ static WEBP_INLINE void VP8LPutBits(VP8LBitWriter* const bw,
 }    // extern "C"
 #endif
 
-#endif  /* WEBP_UTILS_BIT_WRITER_UTILS_H_ */
+#endif  // WEBP_UTILS_BIT_WRITER_UTILS_H_
diff --git a/media/libwebp/utils/filters_utils.h b/media/libwebp/utils/filters_utils.h
index 9466030e5..891771ddc 100644
--- a/media/libwebp/utils/filters_utils.h
+++ b/media/libwebp/utils/filters_utils.h
@@ -29,4 +29,4 @@ WEBP_FILTER_TYPE WebPEstimateBestFilter(const uint8_t* data,
 }    // extern "C"
 #endif
 
-#endif  /* WEBP_UTILS_FILTERS_UTILS_H_ */
+#endif  // WEBP_UTILS_FILTERS_UTILS_H_
diff --git a/media/libwebp/utils/quant_levels_dec_utils.c b/media/libwebp/utils/quant_levels_dec_utils.c
index 5c498382d..a60de3444 100644
--- a/media/libwebp/utils/quant_levels_dec_utils.c
+++ b/media/libwebp/utils/quant_levels_dec_utils.c
@@ -261,9 +261,15 @@ static void CleanupParams(SmoothParams* const p) {
 
 int WebPDequantizeLevels(uint8_t* const data, int width, int height, int stride,
                          int strength) {
-  const int radius = 4 * strength / 100;
+  int radius = 4 * strength / 100;
+
   if (strength < 0 || strength > 100) return 0;
   if (data == NULL || width <= 0 || height <= 0) return 0;  // bad params
+
+  // limit the filter size to not exceed the image dimensions
+  if (2 * radius + 1 > width) radius = (width - 1) >> 1;
+  if (2 * radius + 1 > height) radius = (height - 1) >> 1;
+
   if (radius > 0) {
     SmoothParams p;
     memset(&p, 0, sizeof(p));
diff --git a/media/libwebp/utils/quant_levels_dec_utils.h b/media/libwebp/utils/quant_levels_dec_utils.h
index 4a59e06fe..c05376c67 100644
--- a/media/libwebp/utils/quant_levels_dec_utils.h
+++ b/media/libwebp/utils/quant_levels_dec_utils.h
@@ -32,4 +32,4 @@ int WebPDequantizeLevels(uint8_t* const data, int width, int height, int stride,
 }    // extern "C"
 #endif
 
-#endif  /* WEBP_UTILS_QUANT_LEVELS_DEC_UTILS_H_ */
+#endif  // WEBP_UTILS_QUANT_LEVELS_DEC_UTILS_H_
diff --git a/media/libwebp/utils/quant_levels_utils.h b/media/libwebp/utils/quant_levels_utils.h
index 837bd2730..52a25a5f9 100644
--- a/media/libwebp/utils/quant_levels_utils.h
+++ b/media/libwebp/utils/quant_levels_utils.h
@@ -33,4 +33,4 @@ int QuantizeLevels(uint8_t* const data, int width, int height, int num_levels,
 }    // extern "C"
 #endif
 
-#endif  /* WEBP_UTILS_QUANT_LEVELS_UTILS_H_ */
+#endif  // WEBP_UTILS_QUANT_LEVELS_UTILS_H_
diff --git a/media/libwebp/utils/random_utils.h b/media/libwebp/utils/random_utils.h
index 7b58de8c9..6688d2801 100644
--- a/media/libwebp/utils/random_utils.h
+++ b/media/libwebp/utils/random_utils.h
@@ -60,4 +60,4 @@ static WEBP_INLINE int VP8RandomBits(VP8Random* const rg, int num_bits) {
 }    // extern "C"
 #endif
 
-#endif  /* WEBP_UTILS_RANDOM_UTILS_H_ */
+#endif  // WEBP_UTILS_RANDOM_UTILS_H_
diff --git a/media/libwebp/utils/rescaler_utils.h b/media/libwebp/utils/rescaler_utils.h
index 1c7b31d7f..b5d176ecf 100644
--- a/media/libwebp/utils/rescaler_utils.h
+++ b/media/libwebp/utils/rescaler_utils.h
@@ -98,4 +98,4 @@ int WebPRescalerHasPendingOutput(const WebPRescaler* const rescaler) {
 }    // extern "C"
 #endif
 
-#endif  /* WEBP_UTILS_RESCALER_UTILS_H_ */
+#endif  // WEBP_UTILS_RESCALER_UTILS_H_
diff --git a/media/libwebp/utils/thread_utils.h b/media/libwebp/utils/thread_utils.h
index 0e88c2470..eb788f6e0 100644
--- a/media/libwebp/utils/thread_utils.h
+++ b/media/libwebp/utils/thread_utils.h
@@ -87,4 +87,4 @@ WEBP_EXTERN const WebPWorkerInterface* WebPGetWorkerInterface(void);
 }    // extern "C"
 #endif
 
-#endif  /* WEBP_UTILS_THREAD_UTILS_H_ */
+#endif  // WEBP_UTILS_THREAD_UTILS_H_
diff --git a/media/libwebp/utils/utils.h b/media/libwebp/utils/utils.h
index 27dc7e090..d22151b0f 100644
--- a/media/libwebp/utils/utils.h
+++ b/media/libwebp/utils/utils.h
@@ -107,19 +107,6 @@ static WEBP_INLINE void PutLE32(uint8_t* const data, uint32_t val) {
   PutLE16(data + 2, (int)(val >> 16));
 }
 
-// Returns 31 ^ clz(n) = log2(n). This is the default C-implementation, either
-// based on table or not. Can be used as fallback if clz() is not available.
-#define WEBP_NEED_LOG_TABLE_8BIT
-extern const uint8_t WebPLogTable8bit[256];
-static WEBP_INLINE int WebPLog2FloorC(uint32_t n) {
-  int log_value = 0;
-  while (n >= 256) {
-    log_value += 8;
-    n >>= 8;
-  }
-  return log_value + WebPLogTable8bit[n];
-}
-
 // Returns (int)floor(log2(n)). n must be > 0.
 // use GNU builtins where available.
 #if defined(__GNUC__) && \
@@ -138,6 +125,19 @@ static WEBP_INLINE int BitsLog2Floor(uint32_t n) {
   return first_set_bit;
 }
 #else   // default: use the C-version.
+// Returns 31 ^ clz(n) = log2(n). This is the default C-implementation, either
+// based on table or not. Can be used as fallback if clz() is not available.
+#define WEBP_NEED_LOG_TABLE_8BIT
+extern const uint8_t WebPLogTable8bit[256];
+static WEBP_INLINE int WebPLog2FloorC(uint32_t n) {
+  int log_value = 0;
+  while (n >= 256) {
+    log_value += 8;
+    n >>= 8;
+  }
+  return log_value + WebPLogTable8bit[n];
+}
+
 static WEBP_INLINE int BitsLog2Floor(uint32_t n) { return WebPLog2FloorC(n); }
 #endif
 
@@ -175,4 +175,4 @@ WEBP_EXTERN int WebPGetColorPalette(const struct WebPPicture* const pic,
 }    // extern "C"
 #endif
 
-#endif  /* WEBP_UTILS_UTILS_H_ */
+#endif  // WEBP_UTILS_UTILS_H_