libwebp: update to 0.5.0

third_party/libwebp/dec/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 decoder: internal header.
@@ skipping 25 matching lines @@
   VP8LImageTransformType type_;   // transform type.
   int                    bits_;   // subsampling bits defining transform window.
   int                    xsize_;  // transform window X index.
   int                    ysize_;  // transform window Y index.
   uint32_t              *data_;   // transform data.
 };
 
 typedef struct {
   int             color_cache_size_;
   VP8LColorCache  color_cache_;
+  VP8LColorCache  saved_color_cache_;  // for incremental
 
   int             huffman_mask_;
   int             huffman_subsample_bits_;
   int             huffman_xsize_;
   uint32_t       *huffman_image_;
   int             num_htree_groups_;
   HTreeGroup     *htree_groups_;
+  HuffmanCode    *huffman_tables_;
 } VP8LMetadata;
 
 typedef struct VP8LDecoder VP8LDecoder;
 struct VP8LDecoder {
   VP8StatusCode    status_;
-  VP8LDecodeState  action_;
   VP8LDecodeState  state_;
   VP8Io           *io_;
 
   const WebPDecBuffer *output_;    // shortcut to io->opaque->output
 
   uint32_t        *pixels_;        // Internal data: either uint8_t* for alpha
                                    // or uint32_t* for BGRA.
   uint32_t        *argb_cache_;    // Scratch buffer for temporary BGRA storage.
 
   VP8LBitReader    br_;
+  int              incremental_;   // if true, incremental decoding is expected
+  VP8LBitReader    saved_br_;      // note: could be local variables too
+  int              saved_last_pixel_;
 
   int              width_;
   int              height_;
   int              last_row_;      // last input row decoded so far.
   int              last_pixel_;    // last pixel decoded so far. However, it may
                                    // not be transformed, scaled and
                                    // color-converted yet.
   int              last_out_row_;  // last row output so far.
 
   VP8LMetadata     hdr_;
@@ skipping 44 matching lines @@
 // Clears and deallocate a lossless decoder instance.
 void VP8LDelete(VP8LDecoder* const dec);
 
 //------------------------------------------------------------------------------
 
 #ifdef __cplusplus
 }    // extern "C"
 #endif
 
 #endif  /* WEBP_DEC_VP8LI_H_ */