kc3-lang/brotli/enc/backward_references.h

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• Hash : c6b9c7c5
  Author :
  Date : 2013-11-15T19:02:17
  

  Updates to Brotli compression format, decoder and encoder
  
  This commit contains a batch of changes that were made to the Brotli
  compression algorithm in the last three weeks. Most important changes:
  
    * Added UTF8 context model for good text compression.
    * Simplified context modeling by having only 4 context modes.
    * Per-block context mode selection.
    * Faster backward copying and bit reading functions.
    * More efficient histogram coding.
    * Streaming support for the decoder and encoder.
  

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• enc/backward_references.h

• // Copyright 2013 Google Inc. All Rights Reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  // http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  //
  // Function to find backward reference copies.
  
  #ifndef BROTLI_ENC_BACKWARD_REFERENCES_H_
  #define BROTLI_ENC_BACKWARD_REFERENCES_H_
  
  #include <stdint.h>
  #include <vector>
  
  #include "./hash.h"
  #include "./command.h"
  
  namespace brotli {
  
  void CreateBackwardReferences(size_t num_bytes,
                                size_t position,
                                const uint8_t* ringbuffer,
                                const float* literal_cost,
                                size_t ringbuffer_mask,
                                const size_t max_backward_limit,
                                Hasher* hasher,
                                std::vector<Command>* commands);
  
  }  // namespace brotli
  
  #endif  // BROTLI_ENC_BACKWARD_REFERENCES_H_
  

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