public virtual void WarmupHashHashLongestMatch(int size, uint[] dict, global::encode.hash.HashLongestMatch hasher)
{
int _g1 = 0;
while ((_g1 < size))
{
hasher.Store(dict, 0, _g1++);
}
}
public static void __hx_ctor_encode_hash_HashLongestMatch(global::encode.hash.HashLongestMatch __hx_this, int kBucketBits, int kBlockBits, int kNumLastDistancesToCheck)
{
unchecked {
__hx_this.kBucketBits = kBucketBits;
__hx_this.kBlockBits = kBlockBits;
__hx_this.kNumLastDistancesToCheck = kNumLastDistancesToCheck;
__hx_this.kBucketSize = ((uint)((1 << kBucketBits)));
__hx_this.kBlockSize = ((uint)((1 << kBlockBits)));
__hx_this.kBlockMask = ((uint)((((1 << kBlockBits)) - 1)));
__hx_this.num_ = ((uint[])(new uint[((int)(__hx_this.kBucketSize))]));
__hx_this.buckets_ = ((int[][])(new int[((int)(__hx_this.kBucketSize))][]));
{
int _g1 = 0;
int _g = ((int)(__hx_this.kBucketSize));
while ((_g1 < _g))
{
((int[][])(__hx_this.buckets_))[_g1++] = ((int[])(new int[((int)(__hx_this.kBlockSize))]));
}
}
__hx_this.Reset();
}
}
public override object __hx_setField(string field, int hash, object @value, bool handleProperties)
{
unchecked {
switch (hash)
{
case 695309794:
{
this.hash_h9 = ((global::encode.hash.HashLongestMatch)(@value));
return(@value);
}
case 695309793:
{
this.hash_h8 = ((global::encode.hash.HashLongestMatch)(@value));
return(@value);
}
case 695309792:
{
this.hash_h7 = ((global::encode.hash.HashLongestMatch)(@value));
return(@value);
}
case 695309791:
{
this.hash_h6 = ((global::encode.hash.HashLongestMatch)(@value));
return(@value);
}
case 695309790:
{
this.hash_h5 = ((global::encode.hash.HashLongestMatch)(@value));
return(@value);
}
case 695309789:
{
this.hash_h4 = ((global::encode.hash.HashLongestMatchQuickly)(@value));
return(@value);
}
case 695309788:
{
this.hash_h3 = ((global::encode.hash.HashLongestMatchQuickly)(@value));
return(@value);
}
case 695309787:
{
this.hash_h2 = ((global::encode.hash.HashLongestMatchQuickly)(@value));
return(@value);
}
case 695309786:
{
this.hash_h1 = ((global::encode.hash.HashLongestMatchQuickly)(@value));
return(@value);
}
default:
{
return(base.__hx_setField(field, hash, @value, handleProperties));
}
}
}
}
public static void CreateBackwardReferences(int num_bytes, int position, uint[] ringbuffer, int ringbuffer_mask, double[] literal_cost, int literal_cost_mask, int max_backward_limit, int quality, global::encode.hash.Hashers hashers, int hash_type, int[] dist_cache, global::Array <int> last_insert_len, global::Array <object> commands, int commands_off, global::Array <int> num_commands, global::Array <int> num_literals)
{
unchecked {
if ((quality > 9))
{
global::encode.hash.HashLongestMatch hasher = hashers.hash_h9;
if (((num_bytes >= 3) && (position >= 3)))
{
hasher.Store(ringbuffer, ((position - 3) & ringbuffer_mask), (position - 3));
hasher.Store(ringbuffer, ((position - 2) & ringbuffer_mask), (position - 2));
hasher.Store(ringbuffer, ((position - 1) & ringbuffer_mask), (position - 1));
}
int[] num_matches = global::FunctionMalloc.mallocInt(num_bytes);
global::Array <object> matches = global::FunctionMalloc.mallocArray_encode_hash_BackwardMatch(typeof(global::encode.hash.BackwardMatch), (3 * num_bytes));
int cur_match_pos = 0;
int i = 0;
while (((i + 3) < num_bytes))
{
int max_distance = ((int)(global::System.Math.Min(((double)((position + i))), ((double)(max_backward_limit)))));
if ((matches.length < (cur_match_pos + 325)))
{
matches.concat(global::FunctionMalloc.mallocArray_encode_hash_BackwardMatch(typeof(global::encode.hash.BackwardMatch), ((cur_match_pos + 325) - matches.length)));
}
hasher.FindAllMatches(ringbuffer, ringbuffer_mask, ((uint)((position + i))), ((uint)((num_bytes - i))), ((uint)(max_distance)), num_matches, i, matches, cur_match_pos);
hasher.Store(ringbuffer, ((position + i) & ringbuffer_mask), (position + i));
cur_match_pos += ((int)(((int[])(num_matches))[i]));
if ((((int)(((int[])(num_matches))[i])) == 1))
{
int match_len = ((global::encode.hash.BackwardMatch)(matches[(cur_match_pos - 1)])).length();
if ((match_len > 325))
{
int _g1 = 1;
while ((_g1 < match_len))
{
++_g1;
++i;
hasher.Store(ringbuffer, ((position + i) & ringbuffer_mask), (position + i));
((int[])(num_matches))[i] = 0;
}
}
}
++i;
}
int orig_num_literals = num_literals[0];
int orig_last_insert_len = last_insert_len[0];
int[] orig_dist_cache = ((int[])(new int[4]));
((int[])(orig_dist_cache))[0] = ((int)(((int[])(dist_cache))[0]));
((int[])(orig_dist_cache))[1] = ((int)(((int[])(dist_cache))[1]));
((int[])(orig_dist_cache))[2] = ((int)(((int[])(dist_cache))[2]));
((int[])(orig_dist_cache))[3] = ((int)(((int[])(dist_cache))[3]));
int orig_num_commands = num_commands[0];
{
int _g11 = 0;
while ((_g11 < 2))
{
global::encode.backward_references.ZopfliCostModel model = new global::encode.backward_references.ZopfliCostModel();
if ((_g11++ == 0))
{
model.SetFromLiteralCosts(num_bytes, position, literal_cost, literal_cost_mask);
}
else
{
model.SetFromCommands(num_bytes, position, ringbuffer, ringbuffer_mask, commands, ((commands_off + num_commands[0]) - orig_num_commands), orig_last_insert_len);
}
num_commands[0] = orig_num_commands;
num_literals[0] = orig_num_literals;
last_insert_len[0] = orig_last_insert_len;
global::DefaultFunctions.memcpy_Int(dist_cache, 0, orig_dist_cache, 0, 4);
global::encode.Backward_references.ZopfliIterate(num_bytes, position, ringbuffer, ringbuffer_mask, max_backward_limit, model, num_matches, matches, dist_cache, last_insert_len, commands, commands_off, num_commands, num_literals);
}
}
return;
}
switch (hash_type)
{
case 1:
{
global::encode.Backward_references.CreateBackwardReferences_HashLongestMatchQuickly(num_bytes, position, ringbuffer, ringbuffer_mask, max_backward_limit, quality, hashers.hash_h1, dist_cache, last_insert_len, commands, commands_off, num_commands, num_literals);
break;
}
case 2:
{
global::encode.Backward_references.CreateBackwardReferences_HashLongestMatchQuickly(num_bytes, position, ringbuffer, ringbuffer_mask, max_backward_limit, quality, hashers.hash_h2, dist_cache, last_insert_len, commands, commands_off, num_commands, num_literals);
break;
}
case 3:
{
global::encode.Backward_references.CreateBackwardReferences_HashLongestMatchQuickly(num_bytes, position, ringbuffer, ringbuffer_mask, max_backward_limit, quality, hashers.hash_h3, dist_cache, last_insert_len, commands, commands_off, num_commands, num_literals);
break;
}
case 4:
{
global::encode.Backward_references.CreateBackwardReferences_HashLongestMatchQuickly(num_bytes, position, ringbuffer, ringbuffer_mask, max_backward_limit, quality, hashers.hash_h4, dist_cache, last_insert_len, commands, commands_off, num_commands, num_literals);
break;
}
case 5:
{
global::encode.Backward_references.CreateBackwardReferences_HashLongestMatch(num_bytes, position, ringbuffer, ringbuffer_mask, max_backward_limit, quality, hashers.hash_h5, dist_cache, last_insert_len, commands, commands_off, num_commands, num_literals);
break;
}
case 6:
{
global::encode.Backward_references.CreateBackwardReferences_HashLongestMatch(num_bytes, position, ringbuffer, ringbuffer_mask, max_backward_limit, quality, hashers.hash_h6, dist_cache, last_insert_len, commands, commands_off, num_commands, num_literals);
break;
}
case 7:
{
global::encode.Backward_references.CreateBackwardReferences_HashLongestMatch(num_bytes, position, ringbuffer, ringbuffer_mask, max_backward_limit, quality, hashers.hash_h7, dist_cache, last_insert_len, commands, commands_off, num_commands, num_literals);
break;
}
case 8:
{
global::encode.Backward_references.CreateBackwardReferences_HashLongestMatch(num_bytes, position, ringbuffer, ringbuffer_mask, max_backward_limit, quality, hashers.hash_h8, dist_cache, last_insert_len, commands, commands_off, num_commands, num_literals);
break;
}
case 9:
{
global::encode.Backward_references.CreateBackwardReferences_HashLongestMatch(num_bytes, position, ringbuffer, ringbuffer_mask, max_backward_limit, quality, hashers.hash_h9, dist_cache, last_insert_len, commands, commands_off, num_commands, num_literals);
break;
}
default:
{
break;
}
}
}
}
public static void CreateBackwardReferences_HashLongestMatch(int num_bytes, int position, uint[] ringbuffer, int ringbuffer_mask, int max_backward_limit, int quality, global::encode.hash.HashLongestMatch hasher, int[] dist_cache, global::Array <int> last_insert_len, global::Array <object> commands, int commands_off, global::Array <int> num_commands, global::Array <int> num_literals)
{
unchecked {
if (((num_bytes >= 3) && (position >= 3)))
{
hasher.Store(ringbuffer, ((position - 3) & ringbuffer_mask), (position - 3));
hasher.Store(ringbuffer, ((position - 2) & ringbuffer_mask), (position - 2));
hasher.Store(ringbuffer, ((position - 1) & ringbuffer_mask), (position - 1));
}
int orig_commands_off = commands_off;
int insert_length = last_insert_len[0];
int i = (position & ringbuffer_mask);
int i_diff = (position - i);
int i_end = (i + num_bytes);
int random_heuristics_window_size = (((quality < 9)) ? (64) : (512));
int apply_random_heuristics = (i + random_heuristics_window_size);
while (((i + 3) < i_end))
{
int max_length = (i_end - i);
int max_distance = ((int)(global::System.Math.Min(((double)((i + i_diff))), ((double)(max_backward_limit)))));
global::Array <int> best_len = new global::Array <int>(new int[] { 0 });
global::Array <int> best_len_code = new global::Array <int>(new int[] { 0 });
global::Array <int> best_dist = new global::Array <int>(new int[] { 0 });
global::Array <double> best_score = new global::Array <double>(new double[] { 4.0 });
bool match_found = hasher.FindLongestMatch(ringbuffer, ringbuffer_mask, dist_cache, ((uint)((i + i_diff))), ((uint)(max_length)), ((uint)(max_distance)), best_len, best_len_code, best_dist, best_score);
if (match_found)
{
int delayed_backward_references_in_row = 0;
while (true)
{
--max_length;
global::Array <int> best_len_2 = new global::Array <int>(new int[] { (((quality < 5)) ? (((int)(global::System.Math.Min(((double)((best_len[0] - 1))), ((double)(max_length)))))) : (0)) });
global::Array <int> best_len_code_2 = new global::Array <int>(new int[] { 0 });
global::Array <int> best_dist_2 = new global::Array <int>(new int[] { 0 });
global::Array <double> best_score_2 = new global::Array <double>(new double[] { 4.0 });
max_distance = ((int)(global::System.Math.Min(((double)(((i + i_diff) + 1))), ((double)(max_backward_limit)))));
hasher.Store(ringbuffer, i, (i + i_diff));
match_found = hasher.FindLongestMatch(ringbuffer, ringbuffer_mask, dist_cache, ((uint)(((i + i_diff) + 1))), ((uint)(max_length)), ((uint)(max_distance)), best_len_2, best_len_code_2, best_dist_2, best_score_2);
if ((match_found && (best_score_2[0] >= (best_score[0] + 7.0))))
{
++i;
++insert_length;
best_len[0] = best_len_2[0];
best_len_code[0] = best_len_code_2[0];
best_dist[0] = best_dist_2[0];
best_score[0] = best_score_2[0];
if ((++delayed_backward_references_in_row < 4))
{
continue;
}
}
break;
}
apply_random_heuristics = ((i + (2 * best_len[0])) + random_heuristics_window_size);
max_distance = ((int)(global::System.Math.Min(((double)((i + i_diff))), ((double)(max_backward_limit)))));
int distance_code = global::encode.Backward_references.ComputeDistanceCode(best_dist[0], max_distance, quality, dist_cache);
if (((best_dist[0] <= max_distance) && (distance_code > 0)))
{
((int[])(dist_cache))[3] = ((int)(((int[])(dist_cache))[2]));
((int[])(dist_cache))[2] = ((int)(((int[])(dist_cache))[1]));
((int[])(dist_cache))[1] = ((int)(((int[])(dist_cache))[0]));
((int[])(dist_cache))[0] = best_dist[0];
}
global::encode.command.Command command = new global::encode.command.Command();
command.Command4(insert_length, best_len[0], best_len_code[0], distance_code);
commands[commands_off++] = command;
num_literals[0] += insert_length;
insert_length = 0;
{
int _g1 = 1;
int _g = best_len[0];
while ((_g1 < _g))
{
int j = _g1++;
hasher.Store(ringbuffer, (i + j), ((i + i_diff) + j));
}
}
i += best_len[0];
}
else
{
++insert_length;
hasher.Store(ringbuffer, i, (i + i_diff));
++i;
if ((i > apply_random_heuristics))
{
if ((i > (apply_random_heuristics + (4 * random_heuristics_window_size))))
{
int i_jump = ((int)(global::System.Math.Min(((double)((i + 16))), ((double)((i_end - 4))))));
while ((i < i_jump))
{
hasher.Store(ringbuffer, i, (i + i_diff));
insert_length += 4;
i += 4;
}
}
else
{
int i_jump1 = ((int)(global::System.Math.Min(((double)((i + 8))), ((double)((i_end - 3))))));
while ((i < i_jump1))
{
hasher.Store(ringbuffer, i, (i + i_diff));
insert_length += 2;
i += 2;
}
}
}
}
}
insert_length += (i_end - i);
last_insert_len[0] = insert_length;
num_commands[0] += (commands_off - orig_commands_off);
}
}
