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// 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.
//
// API for Brotli compression
#ifndef BROTLI_ENC_ENCODE_H_
#define BROTLI_ENC_ENCODE_H_
#include <stddef.h>
#include <stdint.h>
#include <string>
#include <vector>
#include "./hash.h"
#include "./ringbuffer.h"
namespace brotli {
class BrotliCompressor {
public:
BrotliCompressor();
~BrotliCompressor();
// Writes the stream header into the internal output buffer.
void WriteStreamHeader();
// Encodes the data in input_buffer as a meta-block and writes it to
// encoded_buffer and sets *encoded_size to the number of bytes that was
// written.
void WriteMetaBlock(const size_t input_size,
const uint8_t* input_buffer,
size_t* encoded_size,
uint8_t* encoded_buffer);
// Writes a zero-length meta-block with end-of-input bit set to the
// internal output buffer and copies the output buffer to encoded_buffer and
// sets *encoded_size to the number of bytes written.
void FinishStream(size_t* encoded_size, uint8_t* encoded_buffer);
private:
Hasher* hasher_;
int dist_ringbuffer_[4];
size_t dist_ringbuffer_idx_;
size_t input_pos_;
RingBuffer ringbuffer_;
std::vector<float> literal_cost_;
int storage_ix_;
uint8_t* storage_;
};
// Compresses the data in input_buffer into encoded_buffer, and sets
// *encoded_size to the compressed length.
// Returns 0 if there was an error and 1 otherwise.
int BrotliCompressBuffer(size_t input_size,
const uint8_t* input_buffer,
size_t* encoded_size,
uint8_t* encoded_buffer);
} // namespace brotli
#endif // BROTLI_ENC_ENCODE_H_
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