libwebp: update to v0.5.1

third_party/libwebp/enc/vp8li.h

 // Copyright 2012 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.
 // -----------------------------------------------------------------------------
 //
 // Lossless encoder: internal header.
 //
 // Author: Vikas Arora (vikaas.arora@gmail.com)
 
 #ifndef WEBP_ENC_VP8LI_H_
 #define WEBP_ENC_VP8LI_H_
 
 #include "./backward_references.h"
 #include "./histogram.h"
 #include "../utils/bit_writer.h"
 #include "../webp/encode.h"
 #include "../webp/format_constants.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 typedef struct {
-  const WebPConfig* config_;    // user configuration and parameters
-  const WebPPicture* pic_;      // input picture.
+  const WebPConfig* config_;      // user configuration and parameters
+  const WebPPicture* pic_;        // input picture.
 
-  uint32_t* argb_;              // Transformed argb image data.
-  uint32_t* argb_scratch_;      // Scratch memory for argb rows
-                                // (used for prediction).
-  uint32_t* transform_data_;    // Scratch memory for transform data.
-  int       current_width_;     // Corresponds to packed image width.
+  uint32_t* argb_;                // Transformed argb image data.
+  uint32_t* argb_scratch_;        // Scratch memory for argb rows
+                                  // (used for prediction).
+  uint32_t* transform_data_;      // Scratch memory for transform data.
+  uint32_t* transform_mem_;       // Currently allocated memory.
+  size_t    transform_mem_size_;  // Currently allocated memory size.
+
+  int       current_width_;       // Corresponds to packed image width.
 
   // Encoding parameters derived from quality parameter.
   int histo_bits_;
   int transform_bits_;
   int cache_bits_;        // If equal to 0, don't use color cache.
 
   // Encoding parameters derived from image characteristics.
   int use_cross_color_;
   int use_subtract_green_;
   int use_predict_;
@@ skipping 11 matching lines @@
 //------------------------------------------------------------------------------
 // internal functions. Not public.
 
 // Encodes the picture.
 // Returns 0 if config or picture is NULL or picture doesn't have valid argb
 // input.
 int VP8LEncodeImage(const WebPConfig* const config,
                     const WebPPicture* const picture);
 
 // Encodes the main image stream using the supplied bit writer.
+// If 'use_cache' is false, disables the use of color cache.
 WebPEncodingError VP8LEncodeStream(const WebPConfig* const config,
                                    const WebPPicture* const picture,
-                                   VP8LBitWriter* const bw);
+                                   VP8LBitWriter* const bw, int use_cache);
 
 //------------------------------------------------------------------------------
 
 #ifdef __cplusplus
 }    // extern "C"
 #endif
 
 #endif  /* WEBP_ENC_VP8LI_H_ */