private static bool Equal(RelativeTone left, RelativeTone right)
{
return(ToneEqual(left, right) &&
left.CycleTo == right.CycleTo &&
left.CycleCount == right.CycleCount &&
left.Next == right.Next);
}
private static RelativeTone[] Relative(Span <MediaToneMessage.Tone> tones)
{
var result = new RelativeTone[tones.Length];
for (int i = 0; i < tones.Length; i++)
{
result[i] = new RelativeTone(tones[i],
tones[i].CycleCount,
tones[i].CycleCount == 0 ? 0 : tones[i].CycleTo - i,
(tones[i].Next - i));
}
return(result);
}
private RelativeTone[] Limit(IndexedTone[] tones)
{
var indexed = tones.AsMemory(0, _limit);
while (HasCycleIntoBoundary(indexed, indexed.Length + 1, indexed.Length + 1))
{
indexed = indexed.Slice(0, indexed.Length - 2);
}
var result = new RelativeTone[indexed.Length];
for (int i = 0; i < indexed.Length; i++)
{
result[i] = indexed.Span[i].Tone;
}
return(result);
}
private static bool ToneEqual(RelativeTone left, RelativeTone right)
{
if (left == null)
{
return(false);
}
if (right == null)
{
return(false);
}
return(left.CB1 == right.CB1 &&
left.CB2 == right.CB2 &&
left.CB3 == right.CB3 &&
left.CB4 == right.CB4 &&
left.Frequency1 == right.Frequency1 &&
left.Frequency2 == right.Frequency2 &&
left.Frequency3 == right.Frequency3 &&
left.Frequency4 == right.Frequency4 &&
left.Duration == right.Duration);
}
private static RelativeTone[] Merge(RelativeTone[] tones)
{
RelativeTone last = tones[0];
var result = new List <RelativeTone> {
last
};
for (int i = 1; i < tones.Length; i++)
{
if (Equal(last, tones[i]))
{
//merge
last.Duration += tones[i].Duration;
}
else
{
last = tones[i];
result.Add(last);
}
}
return(result.ToArray());
}
private static RelativeTone[] ReplaceMatch(List <SequenceMatch> matches, IndexedTone[] indexed)
{
foreach (var match in matches)
{
if (!CanBeReplaced(match, indexed, out var adjustBeforeCycles, out var adjustAfterCycles, out var cycleIntoBefore))
{
continue;
}
var leftEnd = match.Left.Span[match.Length - 1];
if (leftEnd.Tone.Next != 1)
{
throw new NotImplementedException();
}
if (leftEnd.Tone.CycleCount != 0)
{
if (!match.IsGapless)
{
throw new NotImplementedException();
}
}
var rightEnd = match.Right.Span[match.Length - 1];
if (rightEnd.Tone.Next != 1 || rightEnd.Tone.CycleCount != 0)
{
throw new NotImplementedException();
}
var leftStart = match.Left.Span[0];
if (leftStart.Tone.Next != 1 || leftStart.Tone.CycleCount != 0)
{
throw new NotImplementedException();
}
var rightStart = match.Right.Span[0];
if (rightStart.Tone.Next != 1 || rightStart.Tone.CycleCount != 0)
{
throw new NotImplementedException();
}
var before = indexed.AsMemory(0, match.Start);
var after = indexed.AsMemory(match.End + 1);
Memory <IndexedTone> between;
if (match.IsGapless)
{
between = Memory <IndexedTone> .Empty;
leftEnd.Tone.CycleTo = 1 - match.Length;
leftEnd.Tone.CycleCount++;
}
else
{
between = indexed.AsMemory(match.Start + match.Length, match.Between);
leftEnd.Tone.CycleTo = 1;
leftEnd.Tone.CycleCount = 1;
leftEnd.Tone.Next = between.Length + 1;
var lastBetween = between.Span[between.Length - 1];
lastBetween.Tone.CycleTo = 1; //marker
lastBetween.Tone.Next = 1 - between.Length - match.Length;
}
var result = new List <RelativeTone>();
foreach (var tone in before.Span)
{
if (adjustBeforeCycles)
{
var next = tone.Tone.Next + tone.Index;
if (next > before.Length)
{
tone.Tone.Next -= match.Length;
}
var cycle = tone.Tone.CycleTo + tone.Index;
if (cycle > before.Length)
{
tone.Tone.CycleTo -= match.Length;
}
}
result.Add(tone.Tone);
}
foreach (var tone in match.Left.Span)
{
result.Add(tone.Tone);
}
if (cycleIntoBefore)
{
var injected = new RelativeTone(leftEnd.Tone.Tone(), 1, -match.Length, 1 + between.Length);
leftEnd.Tone.Next++;
var beforeLeftEnd = match.Left.Span[match.Length - 2];
beforeLeftEnd.Tone.CycleCount = 2;
beforeLeftEnd.Tone.CycleTo = 2;
if (!match.IsGapless)
{
injected.CycleTo = 1; //between
injected.CycleCount = 1;
injected.Next = 1 + between.Length; //after between
var lastBetween = between.Span[between.Length - 1];
lastBetween.Tone.Next--;
leftEnd.Tone.CycleTo++;
}
result.Add(injected);
}
foreach (var tone in between.Span)
{
result.Add(tone.Tone);
}
foreach (var tone in after.Span)
{
if (adjustAfterCycles)
{
var next = tone.Tone.Next + tone.Index;
if (next < before.Length)
{
//pointed to before
if (cycleIntoBefore)
{
tone.Tone.Next += match.Length - 1;
}
else
{
throw new NotImplementedException();
}
}
else if (next < before.Length + match.Length + between.Length)
{
//pointed to between
tone.Tone.Next += match.Length;
}
else if (next < before.Length + 2 * match.Length + between.Length)
{
//pointed to right
tone.Tone.Next -= between.Length;
}
var cycle = tone.Tone.CycleTo + tone.Index;
if (cycle < before.Length)
{
//pointed to before
if (cycleIntoBefore)
{
tone.Tone.CycleTo += match.Length - 1;
}
else
{
throw new NotImplementedException();
}
}
else if (cycle < before.Length + match.Length + between.Length)
{
//pointed to between
tone.Tone.CycleTo += match.Length;
}
else if (cycle < before.Length + 2 * match.Length + between.Length)
{
//pointed to right
tone.Tone.CycleTo -= between.Length;
}
}
result.Add(tone.Tone);
}
return(result.ToArray());
}
return(null);
}