diff options
Diffstat (limited to 'encoder.cc')
| -rw-r--r-- | encoder.cc | 42 |
1 files changed, 21 insertions, 21 deletions
@@ -75,7 +75,7 @@ int LZ_encoder::get_match_pairs( Pair * pairs ) while( maxlen < len_limit && data[maxlen-delta] == data[maxlen] ) ++maxlen; pairs[num_pairs-1].len = maxlen; - if( maxlen >= len_limit ) pairs = 0; /* done. now just skip */ + if( maxlen >= len_limit ) pairs = 0; // done. now just skip } if( maxlen < 3 ) maxlen = 3; } @@ -269,10 +269,10 @@ int LZ_encoder::sequence_optimizer( const int reps[num_rep_distances], } int cur = 0; - while( true ) /* price optimization loop */ + while( true ) // price optimization loop { move_pos(); - if( ++cur >= num_trials ) /* no more initialized trials */ + if( ++cur >= num_trials ) // no more initialized trials { backward( cur ); return cur; @@ -287,7 +287,7 @@ int LZ_encoder::sequence_optimizer( const int reps[num_rep_distances], return cur; } - /* give final values to current trial */ + // give final values to current trial Trial & cur_trial = trials[cur]; State cur_state; { @@ -298,7 +298,7 @@ int LZ_encoder::sequence_optimizer( const int reps[num_rep_distances], if( prev_index2 == single_step_trial ) { cur_state = trials[prev_index].state; - if( prev_index + 1 == cur ) /* len == 1 */ + if( prev_index + 1 == cur ) // len == 1 { if( dis == 0 ) cur_state.set_short_rep(); else cur_state.set_char(); // literal @@ -306,14 +306,14 @@ int LZ_encoder::sequence_optimizer( const int reps[num_rep_distances], else if( dis < num_rep_distances ) cur_state.set_rep(); else cur_state.set_match(); } - else if( prev_index2 == dual_step_trial ) /* dis == 0 */ + else if( prev_index2 == dual_step_trial ) // dis == 0 { --prev_index; cur_state = trials[prev_index].state; cur_state.set_char(); cur_state.set_rep(); } - else /* if( prev_index2 >= 0 ) */ + else // if( prev_index2 >= 0 ) { prev_index = prev_index2; cur_state = trials[prev_index].state; @@ -340,7 +340,7 @@ int LZ_encoder::sequence_optimizer( const int reps[num_rep_distances], else next_price += price_matched( prev_byte, cur_byte, match_byte ); - /* try last updates to next trial */ + // try last updates to next trial Trial & next_trial = trials[cur+1]; next_trial.update( next_price, -1, cur ); // literal @@ -366,7 +366,7 @@ int LZ_encoder::sequence_optimizer( const int reps[num_rep_distances], const int len_limit = std::min( match_len_limit, triable_bytes ); - /* try literal + rep0 */ + // try literal + rep0 if( match_byte != cur_byte && next_trial.prev_index != cur ) { const uint8_t * const data = ptr_to_current_pos(); @@ -390,7 +390,7 @@ int LZ_encoder::sequence_optimizer( const int reps[num_rep_distances], int start_len = min_match_len; - /* try rep distances */ + // try rep distances for( int rep = 0; rep < num_rep_distances; ++rep ) { const uint8_t * const data = ptr_to_current_pos(); @@ -407,9 +407,9 @@ int LZ_encoder::sequence_optimizer( const int reps[num_rep_distances], trials[cur+i].update( price + rep_len_prices.price( i, pos_state ), rep, cur ); - if( rep == 0 ) start_len = len + 1; /* discard shorter matches */ + if( rep == 0 ) start_len = len + 1; // discard shorter matches - /* try rep + literal + rep0 */ + // try rep + literal + rep0 int len2 = len + 1; const int limit = std::min( match_len_limit + len2, triable_bytes ); while( len2 < limit && data[len2-dis] == data[len2] ) ++len2; @@ -431,7 +431,7 @@ int LZ_encoder::sequence_optimizer( const int reps[num_rep_distances], trials[cur+len+1+len2].update3( price, rep, cur + len + 1, cur ); } - /* try matches */ + // try matches if( newlen >= start_len && newlen <= len_limit ) { const int normal_match_price = match_price + @@ -449,7 +449,7 @@ int LZ_encoder::sequence_optimizer( const int reps[num_rep_distances], trials[cur+len].update( price, dis + num_rep_distances, cur ); - /* try match + literal + rep0 */ + // try match + literal + rep0 if( len == pairs[i].len ) { const uint8_t * const data = ptr_to_current_pos(); @@ -500,7 +500,7 @@ bool LZ_encoder::encode_member( const unsigned long long member_size ) for( int i = 0; i < num_rep_distances; ++i ) reps[i] = 0; if( data_position() != 0 || renc.member_position() != File_header::size ) - return false; /* can be called only once */ + return false; // can be called only once if( !data_finished() ) // encode first byte { @@ -517,7 +517,7 @@ bool LZ_encoder::encode_member( const unsigned long long member_size ) { if( price_counter <= 0 && pending_num_pairs == 0 ) { - price_counter = price_count; /* recalculate prices every these bytes */ + price_counter = price_count; // recalculate prices every these bytes if( dis_price_counter <= 0 ) { dis_price_counter = dis_price_count; update_distance_prices(); } if( align_price_counter <= 0 ) @@ -531,7 +531,7 @@ bool LZ_encoder::encode_member( const unsigned long long member_size ) } int ahead = sequence_optimizer( reps, state ); - if( ahead <= 0 ) return false; /* can't happen */ + if( ahead <= 0 ) return false; // can't happen price_counter -= ahead; for( int i = 0; ahead > 0; ) @@ -542,7 +542,7 @@ bool LZ_encoder::encode_member( const unsigned long long member_size ) bool bit = ( dis < 0 ); renc.encode_bit( bm_match[state()][pos_state], !bit ); - if( bit ) /* literal byte */ + if( bit ) // literal byte { const uint8_t prev_byte = peek( ahead + 1 ); const uint8_t cur_byte = peek( ahead ); @@ -556,13 +556,13 @@ bool LZ_encoder::encode_member( const unsigned long long member_size ) } state.set_char(); } - else /* match or repeated match */ + else // match or repeated match { crc32.update_buf( crc_, ptr_to_current_pos() - ahead, len ); mtf_reps( dis, reps ); bit = ( dis < num_rep_distances ); renc.encode_bit( bm_rep[state()], bit ); - if( bit ) /* repeated match */ + if( bit ) // repeated match { bit = ( dis == 0 ); renc.encode_bit( bm_rep0[state()], !bit ); @@ -582,7 +582,7 @@ bool LZ_encoder::encode_member( const unsigned long long member_size ) state.set_rep(); } } - else /* match */ + else // match { encode_pair( dis - num_rep_distances, len, pos_state ); if( get_slot( dis - num_rep_distances ) >= end_dis_model ) |