1  ///////////////////////////////////////////////////////////////////////////////
       2  //
       3  /// \file       filter_common.h
       4  /// \brief      Filter-specific stuff common for both encoder and decoder
       5  //
       6  //  Author:     Lasse Collin
       7  //
       8  //  This file has been put into the public domain.
       9  //  You can do whatever you want with this file.
      10  //
      11  ///////////////////////////////////////////////////////////////////////////////
      12  
      13  #ifndef LZMA_FILTER_COMMON_H
      14  #define LZMA_FILTER_COMMON_H
      15  
      16  #include "common.h"
      17  
      18  
      19  /// Both lzma_filter_encoder and lzma_filter_decoder begin with these members.
      20  typedef struct {
      21  	/// Filter ID
      22  	lzma_vli id;
      23  
      24  	/// Initializes the filter encoder and calls lzma_next_filter_init()
      25  	/// for filters + 1.
      26  	lzma_init_function init;
      27  
      28  	/// Calculates memory usage of the encoder. If the options are
      29  	/// invalid, UINT64_MAX is returned.
      30  	uint64_t (*memusage)(const void *options);
      31  
      32  } lzma_filter_coder;
      33  
      34  
      35  typedef const lzma_filter_coder *(*lzma_filter_find)(lzma_vli id);
      36  
      37  
      38  extern lzma_ret lzma_validate_chain(const lzma_filter *filters, size_t *count);
      39  
      40  
      41  extern lzma_ret lzma_raw_coder_init(
      42  		lzma_next_coder *next, const lzma_allocator *allocator,
      43  		const lzma_filter *filters,
      44  		lzma_filter_find coder_find, bool is_encoder);
      45  
      46  
      47  extern uint64_t lzma_raw_coder_memusage(lzma_filter_find coder_find,
      48  		const lzma_filter *filters);
      49  
      50  
      51  #endif