diff options
Diffstat (limited to 'encoder.cc')
| -rw-r--r-- | encoder.cc | 26 |
1 files changed, 17 insertions, 9 deletions
@@ -309,6 +309,7 @@ int LZ_encoder::best_pair_sequence( const int reps[num_rep_distances], trials[0].state = state; for( int i = 0; i < num_rep_distances; ++i ) trials[0].reps[i] = reps[i]; + const uint8_t prev_byte = matchfinder[-1]; const uint8_t cur_byte = matchfinder[0]; const uint8_t match_byte = matchfinder[-reps[0]-1]; unsigned int position = matchfinder.data_position(); @@ -318,9 +319,9 @@ int LZ_encoder::best_pair_sequence( const int reps[num_rep_distances], trials[1].prev_index = 0; trials[1].price = price0( bm_match[state()][pos_state] ); if( state.is_char() ) - trials[1].price += literal_encoder.price_symbol( matchfinder[-1], cur_byte ); + trials[1].price += literal_encoder.price_symbol( prev_byte, cur_byte ); else - trials[1].price += literal_encoder.price_matched( matchfinder[-1], cur_byte, match_byte ); + trials[1].price += literal_encoder.price_matched( prev_byte, cur_byte, match_byte ); const int match_price = price1( bm_match[state()][pos_state] ); const int rep_match_price = match_price + price1( bm_rep[state()] ); @@ -354,9 +355,13 @@ int LZ_encoder::best_pair_sequence( const int reps[num_rep_distances], } for( int rep = 0; rep < num_rep_distances; ++rep ) + { + const int price = rep_match_price + + price_rep( rep, state, pos_state ); for( int len = min_match_len; len <= replens[rep]; ++len ) - trials[len].update( rep, 0, rep_match_price + - price_rep( rep, len, state, pos_state ) ); + trials[len].update( rep, 0, price + + rep_match_len_encoder.price( len, pos_state ) ); + } int cur = 0; int num_trials = main_len; @@ -396,14 +401,15 @@ int LZ_encoder::best_pair_sequence( const int reps[num_rep_distances], mtf_reps( cur_trial.dis, cur_trial.reps ); } + const uint8_t prev_byte = matchfinder[-1]; const uint8_t cur_byte = matchfinder[0]; const uint8_t match_byte = matchfinder[-cur_trial.reps[0]-1]; const int pos_state = ++position & pos_state_mask; int next_price = cur_trial.price + price0( bm_match[cur_trial.state()][pos_state] ); if( cur_trial.state.is_char() ) - next_price += literal_encoder.price_symbol( matchfinder[-1], cur_byte ); + next_price += literal_encoder.price_symbol( prev_byte, cur_byte ); else - next_price += literal_encoder.price_matched( matchfinder[-1], cur_byte, match_byte ); + next_price += literal_encoder.price_matched( prev_byte, cur_byte, match_byte ); if( !matchfinder.move_pos() ) return 0; Trial & next_trial = trials[cur+1]; @@ -429,11 +435,13 @@ int LZ_encoder::best_pair_sequence( const int reps[num_rep_distances], while( len < len_limit && data[len] == data[len-dis] ) ++len; if( len >= min_match_len ) { + const int price = rep_match_price + + price_rep( rep, cur_trial.state, pos_state ); while( num_trials < cur + len ) trials[++num_trials].price = infinite_price; for( ; len >= min_match_len; --len ) - trials[cur+len].update( rep, cur, rep_match_price + - price_rep( rep, len, cur_trial.state, pos_state ) ); + trials[cur+len].update( rep, cur, price + + rep_match_len_encoder.price( len, pos_state ) ); } } @@ -447,7 +455,7 @@ int LZ_encoder::best_pair_sequence( const int reps[num_rep_distances], while( num_trials < cur + newlen ) trials[++num_trials].price = infinite_price; - for( int len = newlen; len >= min_match_len; --len ) + for( int len = min_match_len; len <= newlen; ++len ) trials[cur+len].update( match_distances[len] + num_rep_distances, cur, normal_match_price + price_pair( match_distances[len], len, pos_state ) ); |