/// <summary>
/// Applies a resolution function over all runs in the data.
/// </summary>
public RunResolution Resolve(Func <Run, int> resolver)
{
var resolution = new RunResolution.Builder();
for (int index = 0; index < data.Length;)
{
byte symbol = data[index];
if (symbol == 0)
{
int runLength = GetRunLength(index);
int retained = runLength < Run.MinSpecialCodeLength ? runLength : resolver(new Run(runLength));
if (retained > runLength)
{
throw new InvalidOperationException("Cannot request encoding a run longer than originally asked for (" + retained + " > " + runLength + ").");
}
if (retained < Run.MinSpecialCodeLength)
{
if (retained == 0)
{
retained = runLength;
}
for (int i = 0; i < retained; i++)
{
resolution.AddRaw(0);
}
}
else
{
resolution.AddRun(retained);
}
index += retained;
}
else
{
resolution.AddRaw(symbol);
index += 1;
}
}
return(resolution.Build());
}
/// <summary>
/// Applies a resolution function over all runs in the data.
/// </summary>
public RunResolution Resolve(Func <Run, int> resolver)
{
var resolution = new RunResolution.Builder(symbolLengths);
for (int entryIndex = 0, lastRepeatStartIndex = 1, lastRepeatedCode = InitialRepeatedCode; entryIndex < resolution.CodeCount + 1; entryIndex++)
{
int nextCode = entryIndex < resolution.CodeCount ? resolution.GetCodeAt(entryIndex) : -1;
if (nextCode != lastRepeatedCode)
{
if (lastRepeatedCode == 0 || lastRepeatedCode == resolution.FindLastNonRepetitionNonZeroCode(lastRepeatStartIndex - 2))
{
--lastRepeatStartIndex;
}
int runLength = entryIndex - lastRepeatStartIndex;
if (runLength >= Run.MinSpecialCodeLength)
{
int retained = resolver(new Run((byte)lastRepeatedCode, runLength));
if (retained > runLength)
{
throw new InvalidOperationException("Cannot request encoding a run longer than originally asked for (" + retained + " > " + runLength + ").");
}
if (retained >= Run.MinSpecialCodeLength)
{
int runStartIndex = lastRepeatStartIndex + runLength - retained;
entryIndex = lastRepeatedCode == 0 ? resolution.EncodeRepetition(runStartIndex, Skip, retained, 1 << SkipCodeExtraBits)
: resolution.EncodeRepetition(runStartIndex, Repeat, retained, 1 << RepeatCodeExtraBits);
}
}
lastRepeatedCode = nextCode;
lastRepeatStartIndex = entryIndex + 1;
}
}
return(resolution.Build());
}
