/* Copyright 2015 Google Inc. All Rights Reserved.

   Distributed under MIT license.

   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT

*/

/* Algorithms for distributing the literals and commands of a metablock between

   block types and contexts. */

#ifndef BROTLI_ENC_METABLOCK_H_

#define BROTLI_ENC_METABLOCK_H_

#include <brotli/types.h>

#include "./block_splitter.h"

#include "./command.h"

#include "./context.h"

#include "./histogram.h"

#include "./memory.h"

#include "./port.h"

#include "./quality.h"

#if defined(__cplusplus) || defined(c_plusplus)

extern "C" {

#endif

typedef struct MetaBlockSplit {

  BlockSplit literal_split;

  BlockSplit command_split;

  BlockSplit distance_split;

  uint32_t* literal_context_map;

  size_t literal_context_map_size;

  uint32_t* distance_context_map;

  size_t distance_context_map_size;

  HistogramLiteral* literal_histograms;

  size_t literal_histograms_size;

  HistogramCommand* command_histograms;

  size_t command_histograms_size;

  HistogramDistance* distance_histograms;

  size_t distance_histograms_size;

} MetaBlockSplit;

static BROTLI_INLINE void InitMetaBlockSplit(MetaBlockSplit* mb) {

  BrotliInitBlockSplit(&mb->literal_split);

  BrotliInitBlockSplit(&mb->command_split);

  BrotliInitBlockSplit(&mb->distance_split);

  mb->literal_context_map = 0;

  mb->literal_context_map_size = 0;

  mb->distance_context_map = 0;

  mb->distance_context_map_size = 0;

  mb->literal_histograms = 0;

  mb->literal_histograms_size = 0;

  mb->command_histograms = 0;

  mb->command_histograms_size = 0;

  mb->distance_histograms = 0;

  mb->distance_histograms_size = 0;

}

Unexecuted instantiation: brotli_bit_stream.c:InitMetaBlockSplit

Unexecuted instantiation: compress_fragment.c:InitMetaBlockSplit

Unexecuted instantiation: compress_fragment_two_pass.c:InitMetaBlockSplit

Unexecuted instantiation: encode.c:InitMetaBlockSplit

Unexecuted instantiation: metablock.c:InitMetaBlockSplit

static BROTLI_INLINE void DestroyMetaBlockSplit(

    MemoryManager* m, MetaBlockSplit* mb) {

  BrotliDestroyBlockSplit(m, &mb->literal_split);

  BrotliDestroyBlockSplit(m, &mb->command_split);

  BrotliDestroyBlockSplit(m, &mb->distance_split);

  BROTLI_FREE(m, mb->literal_context_map);

  BROTLI_FREE(m, mb->distance_context_map);

  BROTLI_FREE(m, mb->literal_histograms);

  BROTLI_FREE(m, mb->command_histograms);

  BROTLI_FREE(m, mb->distance_histograms);

}

Unexecuted instantiation: brotli_bit_stream.c:DestroyMetaBlockSplit

Unexecuted instantiation: compress_fragment.c:DestroyMetaBlockSplit

Unexecuted instantiation: compress_fragment_two_pass.c:DestroyMetaBlockSplit

Unexecuted instantiation: encode.c:DestroyMetaBlockSplit

Unexecuted instantiation: metablock.c:DestroyMetaBlockSplit

/* Uses the slow shortest-path block splitter and does context clustering. */

BROTLI_INTERNAL void BrotliBuildMetaBlock(MemoryManager* m,

                                          const uint8_t* ringbuffer,

                                          const size_t pos,

                                          const size_t mask,

                                          const BrotliEncoderParams* params,

                                          uint8_t prev_byte,

                                          uint8_t prev_byte2,

                                          const Command* cmds,

                                          size_t num_commands,

                                          ContextType literal_context_mode,

                                          MetaBlockSplit* mb);

/* Uses a fast greedy block splitter that tries to merge current block with the

   last or the second last block and uses a static context clustering which

   is the same for all block types. */

BROTLI_INTERNAL void BrotliBuildMetaBlockGreedy(

    MemoryManager* m, const uint8_t* ringbuffer, size_t pos, size_t mask,

    uint8_t prev_byte, uint8_t prev_byte2, ContextType literal_context_mode,

    size_t num_contexts, const uint32_t* static_context_map,

    const Command* commands, size_t n_commands, MetaBlockSplit* mb);

BROTLI_INTERNAL void BrotliOptimizeHistograms(size_t num_direct_distance_codes,

                                              size_t distance_postfix_bits,

                                              MetaBlockSplit* mb);

#if defined(__cplusplus) || defined(c_plusplus)

}  /* extern "C" */

#endif

#endif  /* BROTLI_ENC_METABLOCK_H_ */