diff options
Diffstat (limited to 'decoder.c')
| -rw-r--r-- | decoder.c | 68 |
1 files changed, 33 insertions, 35 deletions
@@ -25,7 +25,7 @@ #include <string.h> #include <unistd.h> -#include "clzip.h" +#include "lzip.h" #include "decoder.h" @@ -124,10 +124,10 @@ bool LZd_verify_trailer( struct LZ_decoder * const decoder, File_trailer trailer; const int trailer_size = Ft_versioned_size( decoder->member_version ); const unsigned long long member_size = - Rd_member_position( decoder->range_decoder ) + trailer_size; + Rd_member_position( decoder->rdec ) + trailer_size; bool error = false; - int size = Rd_read_data( decoder->range_decoder, trailer, trailer_size ); + int size = Rd_read_data( decoder->rdec, trailer, trailer_size ); if( size < trailer_size ) { error = true; @@ -142,7 +142,7 @@ bool LZd_verify_trailer( struct LZ_decoder * const decoder, if( decoder->member_version == 0 ) Ft_set_member_size( trailer, member_size ); - if( decoder->range_decoder->code != 0 ) + if( decoder->rdec->code != 0 ) { error = true; Pp_show_msg( pp, "Range decoder final code is not zero" ); @@ -177,7 +177,7 @@ bool LZd_verify_trailer( struct LZ_decoder * const decoder, Ft_get_member_size( trailer ), member_size, member_size ); } } - if( !error && pp->verbosity >= 3 && LZd_data_position( decoder ) > 0 && member_size > 0 ) + if( !error && pp->verbosity >= 2 && LZd_data_position( decoder ) > 0 && member_size > 0 ) fprintf( stderr, "%6.3f:1, %6.3f bits/byte, %5.2f%% saved. ", (double)LZd_data_position( decoder ) / member_size, ( 8.0 * member_size ) / LZd_data_position( decoder ), @@ -199,84 +199,82 @@ int LZd_decode_member( struct LZ_decoder * const decoder, unsigned rep1 = 0; /* used for efficient coding of */ unsigned rep2 = 0; /* repeated distances */ unsigned rep3 = 0; - State state = 0; - Rd_load( decoder->range_decoder ); - while( !Rd_finished( decoder->range_decoder ) ) + Rd_load( decoder->rdec ); + while( !Rd_finished( decoder->rdec ) ) { const int pos_state = LZd_data_position( decoder ) & pos_state_mask; - if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_match[state][pos_state] ) == 0 ) + if( Rd_decode_bit( decoder->rdec, &decoder->bm_match[state][pos_state] ) == 0 ) /* 1st bit */ { const uint8_t prev_byte = LZd_get_prev_byte( decoder ); if( St_is_char( state ) ) { state -= ( state < 4 ) ? state : 3; - LZd_put_byte( decoder, Rd_decode_tree( decoder->range_decoder, + LZd_put_byte( decoder, Rd_decode_tree( decoder->rdec, decoder->bm_literal[get_lit_state(prev_byte)], 8 ) ); } else { state -= ( state < 10 ) ? 3 : 6; - LZd_put_byte( decoder, Rd_decode_matched( decoder->range_decoder, - decoder->bm_literal[get_lit_state(prev_byte)], LZd_get_byte( decoder, rep0 ) ) ); + LZd_put_byte( decoder, Rd_decode_matched( decoder->rdec, + decoder->bm_literal[get_lit_state(prev_byte)], + LZd_get_byte( decoder, rep0 ) ) ); } } else { int len; - if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep[state] ) == 1 ) + if( Rd_decode_bit( decoder->rdec, &decoder->bm_rep[state] ) == 1 ) /* 2nd bit */ { - len = 0; - if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep0[state] ) == 1 ) + if( Rd_decode_bit( decoder->rdec, &decoder->bm_rep0[state] ) == 0 ) /* 3rd bit */ + { + if( Rd_decode_bit( decoder->rdec, &decoder->bm_len[state][pos_state] ) == 0 ) /* 4th bit */ + { state = St_set_short_rep( state ); + LZd_put_byte( decoder, LZd_get_byte( decoder, rep0 ) ); continue; } + } + else { unsigned distance; - if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep1[state] ) == 0 ) + if( Rd_decode_bit( decoder->rdec, &decoder->bm_rep1[state] ) == 0 ) /* 4th bit */ distance = rep1; else { - if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_rep2[state] ) == 0 ) + if( Rd_decode_bit( decoder->rdec, &decoder->bm_rep2[state] ) == 0 ) /* 5th bit */ distance = rep2; - else { distance = rep3; rep3 = rep2; } + else + { distance = rep3; rep3 = rep2; } rep2 = rep1; } rep1 = rep0; rep0 = distance; } - else - { - if( Rd_decode_bit( decoder->range_decoder, &decoder->bm_len[state][pos_state] ) == 0 ) - { state = St_set_short_rep( state ); len = 1; } - } - if( len == 0 ) - { - state = St_set_rep( state ); - len = min_match_len + Led_decode( &decoder->rep_match_len_decoder, decoder->range_decoder, pos_state ); - } + state = St_set_rep( state ); + len = min_match_len + Rd_decode_len( decoder->rdec, &decoder->rep_len_model, pos_state ); } else { int dis_slot; const unsigned rep0_saved = rep0; - len = min_match_len + Led_decode( &decoder->len_decoder, decoder->range_decoder, pos_state ); - dis_slot = Rd_decode_tree6( decoder->range_decoder, decoder->bm_dis_slot[get_dis_state(len)] ); + len = min_match_len + Rd_decode_len( decoder->rdec, &decoder->match_len_model, pos_state ); + dis_slot = Rd_decode_tree6( decoder->rdec, decoder->bm_dis_slot[get_dis_state(len)] ); if( dis_slot < start_dis_model ) rep0 = dis_slot; else { const int direct_bits = ( dis_slot >> 1 ) - 1; rep0 = ( 2 | ( dis_slot & 1 ) ) << direct_bits; if( dis_slot < end_dis_model ) - rep0 += Rd_decode_tree_reversed( decoder->range_decoder, + rep0 += Rd_decode_tree_reversed( decoder->rdec, decoder->bm_dis + rep0 - dis_slot - 1, direct_bits ); else { - rep0 += Rd_decode( decoder->range_decoder, direct_bits - dis_align_bits ) << dis_align_bits; - rep0 += Rd_decode_tree_reversed4( decoder->range_decoder, decoder->bm_align ); + rep0 += Rd_decode( decoder->rdec, direct_bits - dis_align_bits ) << dis_align_bits; + rep0 += Rd_decode_tree_reversed4( decoder->rdec, decoder->bm_align ); if( rep0 == 0xFFFFFFFFU ) /* Marker found */ { rep0 = rep0_saved; - Rd_normalize( decoder->range_decoder ); + Rd_normalize( decoder->rdec ); LZd_flush_data( decoder ); if( len == min_match_len ) /* End Of Stream marker */ { @@ -284,7 +282,7 @@ int LZd_decode_member( struct LZ_decoder * const decoder, } if( len == min_match_len + 1 ) /* Sync Flush marker */ { - Rd_load( decoder->range_decoder ); continue; + Rd_load( decoder->rdec ); continue; } if( pp->verbosity >= 0 ) { |