[Imp] Pressing Ctrl while moving loop points or clicking loop start/end spin buttons now moves the loop, keeping the loop length constant.

git-svn-id: https://source.openmpt.org/svn/openmpt/trunk/OpenMPT@22592 56274372-70c3-4bfc-bfc3-4c3a0b034d27

Author: sagamusix

mptrack/Ctrl_smp.cpp

@@ -2508,99 +2508,29 @@ void CCtrlSamples::OnSustainPointsChanged()
 }
 
 
-#define SMPLOOP_ACCURACY	7	// 5%
-#define BIDILOOP_ACCURACY	2	// 5%
-
-
-bool MPT_LoopCheck(int sstart0, int sstart1, int send0, int send1)
-{
-	int dse0 = send0 - sstart0;
-	if ((dse0 < -SMPLOOP_ACCURACY) || (dse0 > SMPLOOP_ACCURACY)) return false;
-	int dse1 = send1 - sstart1;
-	if ((dse1 < -SMPLOOP_ACCURACY) || (dse1 > SMPLOOP_ACCURACY)) return false;
-	int dstart = sstart1 - sstart0;
-	int dend = send1 - send0;
-	if (!dstart) dstart = dend >> 7;
-	if (!dend) dend = dstart >> 7;
-	if ((dstart ^ dend) < 0) return false;
-	int delta = dend - dstart;
-	return ((delta > -SMPLOOP_ACCURACY) && (delta < SMPLOOP_ACCURACY));
-}
-
-
-bool MPT_BidiEndCheck(int spos0, int spos1, int spos2)
-{
-	int delta0 = spos1 - spos0;
-	int delta1 = spos2 - spos1;
-	int delta2 = spos2 - spos0;
-	if (!delta0) delta0 = delta1 >> 7;
-	if (!delta1) delta1 = delta0 >> 7;
-	if ((delta1 ^ delta0) < 0) return false;
-	return ((delta0 >= -1) && (delta0 <= 0) && (delta1 >= -1) && (delta1 <= 0) && (delta2 >= -1) && (delta2 <= 0));
-}
-
-
-bool MPT_BidiStartCheck(int spos0, int spos1, int spos2)
-{
-	int delta1 = spos1 - spos0;
-	int delta0 = spos2 - spos1;
-	int delta2 = spos2 - spos0;
-	if (!delta0) delta0 = delta1 >> 7;
-	if (!delta1) delta1 = delta0 >> 7;
-	if ((delta1 ^ delta0) < 0) return false;
-	return ((delta0 >= -1) && (delta0 <= 0) && (delta1 > -1) && (delta1 <= 0) && (delta2 >= -1) && (delta2 <= 0));
-}
-
-
-
 void CCtrlSamples::OnVScroll(UINT nCode, UINT, CScrollBar *scrollBar)
 {
-	TCHAR s[256];
+	TCHAR s[32];
 	if(IsLocked()) return;
 	ModSample &sample = m_sndFile.GetSample(m_nSample);
-	const uint8 *pSample = mpt::byte_cast<const uint8 *>(sample.sampleb());
-	const uint32 inc = sample.GetBytesPerSample();
-	SmpLength i;
-	int pos;
+	const bool moveLoop = CMainFrame::GetInputHandler()->CtrlPressed();
 	bool redraw = false;
 	static CScrollBar *lastScrollbar = nullptr;
 
 	LockControls();
-	if ((!sample.nLength) || (!pSample)) goto NoSample;
-	if (sample.uFlags[CHN_16BIT])
-	{
-		pSample++;
-	}
 	// Loop Start
-	if ((pos = m_SpinLoopStart.GetPos32()) != 0 && sample.nLoopEnd > 0)
+	if(int pos = m_SpinLoopStart.GetPos32(); pos != 0 && sample.nLoopEnd > 0 && sample.HasSampleData())
 	{
-		bool bOk = false;
-		const uint8 *p = pSample + sample.nLoopStart * inc;
-		int find0 = (int)pSample[sample.nLoopEnd*inc-inc];
-		int find1 = (int)pSample[sample.nLoopEnd*inc];
-		// Find Next LoopStart Point
-		if (pos > 0)
-		{
-			for (i = sample.nLoopStart + 1; i + 16 < sample.nLoopEnd; i++)
-			{
-				p += inc;
-				bOk = sample.uFlags[CHN_PINGPONGLOOP] ? MPT_BidiStartCheck(p[0], p[inc], p[inc*2]) : MPT_LoopCheck(find0, find1, p[0], p[inc]);
-				if (bOk) break;
-			}
-		} else
-		// Find Prev LoopStart Point
+		if(SmpLength i = SampleEdit::FindLoopStart(sample, false, pos > 0, moveLoop); i < sample.nLength)
 		{
-			for (i = sample.nLoopStart; i; )
+			if(!m_startedEdit && lastScrollbar != scrollBar)
+				PrepareUndo(moveLoop ? "Move Loop" : "Set Loop Start");
+			if(moveLoop)
 			{
-				i--;
-				p -= inc;
-				bOk = sample.uFlags[CHN_PINGPONGLOOP] ? MPT_BidiStartCheck(p[0], p[inc], p[inc*2]) : MPT_LoopCheck(find0, find1, p[0], p[inc]);
-				if (bOk) break;
+				sample.nLoopEnd = i + (sample.nLoopEnd - sample.nLoopStart);
+				wsprintf(s, _T("%u"), sample.nLoopEnd);
+				m_EditLoopEnd.SetWindowText(s);
 			}
-		}
-		if (bOk)
-		{
-			if(!m_startedEdit && lastScrollbar != scrollBar) PrepareUndo("Set Loop Start");
 			sample.nLoopStart = i;
 			wsprintf(s, _T("%u"), sample.nLoopStart);
 			m_EditLoopStart.SetWindowText(s);
@@ -2610,34 +2540,18 @@ void CCtrlSamples::OnVScroll(UINT nCode, UINT, CScrollBar *scrollBar)
 		m_SpinLoopStart.SetPos(0);
 	}
 	// Loop End
-	if ((pos = m_SpinLoopEnd.GetPos32()) != 0)
+	if(int pos = m_SpinLoopEnd.GetPos32(); pos != 0 && sample.HasSampleData())
 	{
-		bool bOk = false;
-		const uint8 *p = pSample + sample.nLoopEnd * inc;
-		int find0 = (int)pSample[sample.nLoopStart*inc];
-		int find1 = (int)pSample[sample.nLoopStart*inc+inc];
-		// Find Next LoopEnd Point
-		if (pos > 0)
-		{
-			for (i = sample.nLoopEnd + 1; i <= sample.nLength; i++, p += inc)
-			{
-				bOk = sample.uFlags[CHN_PINGPONGLOOP] ? MPT_BidiEndCheck(p[0], p[inc], p[inc*2]) : MPT_LoopCheck(find0, find1, p[0], p[inc]);
-				if (bOk) break;
-			}
-		} else
-		// Find Prev LoopEnd Point
+		if(SmpLength i = SampleEdit::FindLoopEnd(sample, false, pos > 0, moveLoop); i > 0)
 		{
-			for (i = sample.nLoopEnd; i > sample.nLoopStart + 16; )
+			if(!m_startedEdit && lastScrollbar != scrollBar)
+				PrepareUndo(moveLoop ? "Move Loop" : "Set Loop End");
+			if(moveLoop)
 			{
-				i--;
-				p -= inc;
-				bOk = sample.uFlags[CHN_PINGPONGLOOP] ? MPT_BidiEndCheck(p[0], p[inc], p[inc*2]) : MPT_LoopCheck(find0, find1, p[0], p[inc]);
-				if (bOk) break;
+				sample.nLoopStart = i - (sample.nLoopEnd - sample.nLoopStart);
+				wsprintf(s, _T("%u"), sample.nLoopStart);
+				m_EditLoopStart.SetWindowText(s);
 			}
-		}
-		if (bOk)
-		{
-			if(!m_startedEdit && lastScrollbar != scrollBar) PrepareUndo("Set Loop End");
 			sample.nLoopEnd = i;
 			wsprintf(s, _T("%u"), sample.nLoopEnd);
 			m_EditLoopEnd.SetWindowText(s);
@@ -2647,35 +2561,18 @@ void CCtrlSamples::OnVScroll(UINT nCode, UINT, CScrollBar *scrollBar)
 		m_SpinLoopEnd.SetPos(0);
 	}
 	// Sustain Loop Start
-	if ((pos = m_SpinSustainStart.GetPos32()) != 0 && sample.nSustainEnd > 0)
+	if(int pos = m_SpinSustainStart.GetPos32(); pos != 0 && sample.nSustainEnd > 0 && sample.HasSampleData())
 	{
-		bool bOk = false;
-		const uint8 *p = pSample + sample.nSustainStart * inc;
-		int find0 = (int)pSample[sample.nSustainEnd*inc-inc];
-		int find1 = (int)pSample[sample.nSustainEnd*inc];
-		// Find Next Sustain LoopStart Point
-		if (pos > 0)
-		{
-			for (i = sample.nSustainStart + 1; i + 16 < sample.nSustainEnd; i++)
-			{
-				p += inc;
-				bOk = sample.uFlags[CHN_PINGPONGSUSTAIN] ? MPT_BidiStartCheck(p[0], p[inc], p[inc*2]) : MPT_LoopCheck(find0, find1, p[0], p[inc]);
-				if (bOk) break;
-			}
-		} else
-		// Find Prev Sustain LoopStart Point
+		if(SmpLength i = SampleEdit::FindLoopStart(sample, true, pos > 0, moveLoop); i < sample.nLength)
 		{
-			for (i = sample.nSustainStart; i; )
+			if(!m_startedEdit && lastScrollbar != scrollBar)
+				PrepareUndo(moveLoop ? "Move Sustain Loop" : "Set Sustain Loop Start");
+			if(moveLoop)
 			{
-				i--;
-				p -= inc;
-				bOk = sample.uFlags[CHN_PINGPONGSUSTAIN] ? MPT_BidiStartCheck(p[0], p[inc], p[inc*2]) : MPT_LoopCheck(find0, find1, p[0], p[inc]);
-				if (bOk) break;
+				sample.nSustainEnd = i + (sample.nSustainEnd - sample.nSustainStart);
+				wsprintf(s, _T("%u"), sample.nSustainEnd);
+				m_EditSustainEnd.SetWindowText(s);
 			}
-		}
-		if (bOk)
-		{
-			if(!m_startedEdit && lastScrollbar != scrollBar) PrepareUndo("Set Sustain Loop Start");
 			sample.nSustainStart = i;
 			wsprintf(s, _T("%u"), sample.nSustainStart);
 			m_EditSustainStart.SetWindowText(s);
@@ -2685,34 +2582,18 @@ void CCtrlSamples::OnVScroll(UINT nCode, UINT, CScrollBar *scrollBar)
 		m_SpinSustainStart.SetPos(0);
 	}
 	// Sustain Loop End
-	if ((pos = m_SpinSustainEnd.GetPos32()) != 0)
+	if(int pos = m_SpinSustainEnd.GetPos32(); pos != 0 && sample.HasSampleData())
 	{
-		bool bOk = false;
-		const uint8 *p = pSample + sample.nSustainEnd * inc;
-		int find0 = (int)pSample[sample.nSustainStart*inc];
-		int find1 = (int)pSample[sample.nSustainStart*inc+inc];
-		// Find Next LoopEnd Point
-		if (pos > 0)
-		{
-			for (i = sample.nSustainEnd + 1; i + 1 < sample.nLength; i++, p += inc)
-			{
-				bOk = sample.uFlags[CHN_PINGPONGSUSTAIN] ? MPT_BidiEndCheck(p[0], p[inc], p[inc*2]) : MPT_LoopCheck(find0, find1, p[0], p[inc]);
-				if (bOk) break;
-			}
-		} else
-		// Find Prev LoopEnd Point
+		if(SmpLength i = SampleEdit::FindLoopEnd(sample, true, pos > 0, moveLoop); i > 0)
 		{
-			for (i = sample.nSustainEnd; i > sample.nSustainStart + 16; )
+			if(!m_startedEdit && lastScrollbar != scrollBar)
+				PrepareUndo(moveLoop ? "Move Sustain Loop" : "Set Sustain Loop End");
+			if(moveLoop)
 			{
-				i--;
-				p -= inc;
-				bOk = sample.uFlags[CHN_PINGPONGSUSTAIN] ? MPT_BidiEndCheck(p[0], p[inc], p[inc*2]) : MPT_LoopCheck(find0, find1, p[0], p[inc]);
-				if (bOk) break;
+				sample.nSustainStart = i - (sample.nSustainEnd - sample.nSustainStart);
+				wsprintf(s, _T("%u"), sample.nSustainStart);
+				m_EditSustainStart.SetWindowText(s);
 			}
-		}
-		if (bOk)
-		{
-			if(!m_startedEdit && lastScrollbar != scrollBar) PrepareUndo("Set Sustain Loop End");
 			sample.nSustainEnd = i;
 			wsprintf(s, _T("%u"), sample.nSustainEnd);
 			m_EditSustainEnd.SetWindowText(s);
@@ -2721,9 +2602,8 @@ void CCtrlSamples::OnVScroll(UINT nCode, UINT, CScrollBar *scrollBar)
 		}
 		m_SpinSustainEnd.SetPos(0);
 	}
-NoSample:
 	// FineTune / C-5 Speed
-	if ((pos = m_SpinFineTune.GetPos32()) != 0)
+	if(int pos = m_SpinFineTune.GetPos32(); pos != 0)
 	{
 		if(!m_startedEdit && lastScrollbar != scrollBar)
 			PrepareUndo("Finetune");
@@ -2930,8 +2810,7 @@ void CCtrlSamples::OnXFade()
 	CSampleXFadeDlg dlg(this, sample);
 	if(dlg.DoModal() == IDOK)
 	{
-		const SmpLength loopStart = dlg.m_useSustainLoop ? sample.nSustainStart: sample.nLoopStart;
-		const SmpLength loopEnd = dlg.m_useSustainLoop ? sample.nSustainEnd: sample.nLoopEnd;
+		const auto [loopStart, loopEnd] = dlg.m_useSustainLoop ? sample.GetSustainLoop() : sample.GetLoop();
 		const SmpLength maxSamples = std::min({ sample.nLength, loopStart, loopEnd / 2 });
 		SmpLength fadeSamples = dlg.PercentToSamples(dlg.m_fadeLength);
 		LimitMax(fadeSamples, maxSamples);

mptrack/View_smp.cpp

@@ -1848,9 +1848,11 @@ void CViewSample::OnMouseMove(UINT flags, CPoint point)
 			m_startDragValue = ScreenToSample(point.x);
 		}
 
+		const bool moveLoop = (flags & MK_CONTROL);
 		bool update = false;
 		SmpLength *updateLoopPoint = nullptr;
 		const char *updateLoopDesc = nullptr;
+		SmpLength loopLength = 0;
 		switch(m_dragItem)
 		{
 		case HitTestItem::SelectionStart:
@@ -1863,28 +1865,50 @@ void CViewSample::OnMouseMove(UINT flags, CPoint point)
 			}
 			break;
 		case HitTestItem::LoopStart:
-			if(x < sample.nLoopEnd)
+			if(moveLoop)
+			{
+				updateLoopPoint = &sample.nLoopStart;
+				updateLoopDesc = "Move Loop";
+				loopLength = sample.nLoopEnd - sample.nLoopStart;
+			} else if(x < sample.nLoopEnd)
 			{
 				updateLoopPoint = &sample.nLoopStart;
 				updateLoopDesc = "Set Loop Start";
 			}
 			break;
 		case HitTestItem::LoopEnd:
-			if(x > sample.nLoopStart)
+			if(moveLoop)
+			{
+				updateLoopPoint = &sample.nLoopStart;
+				updateLoopDesc = "Move Loop";
+				loopLength = sample.nLoopEnd - sample.nLoopStart;
+				x = (x > loopLength) ? x - loopLength : 0;
+			} else if(x > sample.nLoopStart)
 			{
 				updateLoopPoint = &sample.nLoopEnd;
 				updateLoopDesc = "Set Loop End";
 			}
 			break;
 		case HitTestItem::SustainStart:
-			if(x < sample.nSustainEnd)
+			if(moveLoop)
+			{
+				updateLoopPoint = &sample.nSustainStart;
+				updateLoopDesc = "Move Sustain Loop";
+				loopLength = sample.nSustainEnd - sample.nSustainStart;
+			} else if(x < sample.nSustainEnd)
 			{
 				updateLoopPoint = &sample.nSustainStart;
 				updateLoopDesc = "Set Sustain Start";
 			}
 			break;
 		case HitTestItem::SustainEnd:
-			if(x > sample.nSustainStart)
+			if(moveLoop)
+			{
+				updateLoopPoint = &sample.nSustainStart;
+				updateLoopDesc = "Move Loop";
+				loopLength = sample.nSustainEnd - sample.nSustainStart;
+				x = (x > loopLength) ? x - loopLength : 0;
+			} else if(x > sample.nSustainStart)
 			{
 				updateLoopPoint = &sample.nSustainEnd;
 				updateLoopDesc = "Set Sustain End";
@@ -1900,13 +1924,20 @@ void CViewSample::OnMouseMove(UINT flags, CPoint point)
 			break;
 		}
 
+		if(loopLength)
+			LimitMax(x, sample.nLength - loopLength);
+
 		if(updateLoopPoint && updateLoopDesc && *updateLoopPoint != x)
 		{
 			if(!m_dragPreparedUndo)
 				pModDoc->GetSampleUndo().PrepareUndo(m_nSample, sundo_none, updateLoopDesc);
 			m_dragPreparedUndo = true;
 			update = true;
 			*updateLoopPoint = x;
+			if(loopLength && updateLoopPoint == &sample.nLoopStart)
+				sample.nLoopEnd = sample.nLoopStart + loopLength;
+			else if(loopLength && updateLoopPoint == &sample.nSustainStart)
+				sample.nSustainEnd = sample.nSustainStart + loopLength;
 			sample.PrecomputeLoops(sndFile, true);
 			SetModified(SampleHint().Info(), true, false);
 		}
@@ -2041,7 +2072,7 @@ void CViewSample::OnLButtonDown(UINT flags, CPoint point)
 	} else
 	{
 		// ctrl + click = play from cursor pos
-		if(flags & MK_CONTROL)
+		if((flags & MK_CONTROL) && point.y >= m_timelineHeight)
 			PlayNote(NOTE_MIDDLEC, ScreenToSample(point.x));
 	}
 }

soundlib/ModSample.h

@@ -148,6 +148,10 @@ struct ModSample
 	void SetLoop(SmpLength start, SmpLength end, bool enable, bool pingpong, CSoundFile &sndFile);
 	// Set sustain loop points and update loop wrap-around buffer
 	void SetSustainLoop(SmpLength start, SmpLength end, bool enable, bool pingpong, CSoundFile &sndFile);
+	// Retrieve the normal loop points
+	std::pair<SmpLength, SmpLength> GetLoop() const noexcept { return std::make_pair(nLoopStart, nLoopEnd); }
+	// Retrieve the sustain loop points
+	std::pair<SmpLength, SmpLength> GetSustainLoop() const noexcept { return std::make_pair(nSustainStart, nSustainEnd); }
 	// Update loop wrap-around buffer
 	void PrecomputeLoops(CSoundFile &sndFile, bool updateChannels = true);
 

soundlib/modsmp_ctrl.cpp

@@ -105,8 +105,7 @@ static void XFadeSampleImpl(const T *srcIn, const T *srcOut, T *output, const Sm
 bool XFadeSample(ModSample &smp, SmpLength fadeLength, int fadeLaw, bool afterloopFade, bool useSustainLoop, CSoundFile &sndFile)
 {
 	if(!smp.HasSampleData()) return false;
-	const SmpLength loopStart = useSustainLoop ? smp.nSustainStart : smp.nLoopStart;
-	const SmpLength loopEnd = useSustainLoop ? smp.nSustainEnd : smp.nLoopEnd;
+	const auto [loopStart, loopEnd] = useSustainLoop ? smp.GetSustainLoop() : smp.GetLoop();
 
 	if(loopEnd <= loopStart || loopEnd > smp.nLength) return false;
 	if(loopStart < fadeLength) return false;