- Plugin latency/delay compensation is now introduced

  as an option to tracks only (cf. Track/Properties...
  /Latency compensation). (HIGHLY EXPERIMENTAL)

ChangeLog

@@ -6,8 +6,9 @@ ChangeLog
 
 GIT HEAD
 
-- Plugin latency/delay compensation is now intrduced
-  as an option to tracks only. (HIGHLY EXPERIMENTAL)
+- Plugin latency/delay compensation is now introduced
+  as an option to tracks only (cf. Track/Properties...
+  /Latency compensation). (HIGHLY EXPERIMENTAL)
 
 - Refactored all singleton/unique application instance
   setup logic away from X11/Xcb hackery. (EXPERIMENTAL)

src/qtractorAudioEngine.cpp

@@ -502,6 +502,7 @@ qtractorAudioEngine::qtractorAudioEngine ( qtractorSession *pSession )
 	m_pExportFile  = NULL;
 	m_pExportBuses = NULL;
 	m_pExportBuffer = NULL;
+	m_iExportOffset = 0;
 	m_iExportStart = 0;
 	m_iExportEnd   = 0;
 	m_bExportDone  = true;
@@ -1173,7 +1174,7 @@ void qtractorAudioEngine::process_export ( unsigned int nframes )
 	const unsigned long iFrameEnd   = iFrameStart + nframes;
 
 	// Write output bus buffers to export audio file...
-	if (iFrameStart < m_iExportEnd && iFrameEnd > m_iExportStart) {
+	if (iFrameStart < m_iExportEnd) {
 		// Prepare mix-down buffer...
 		m_pExportBuffer->process_prepare(nframes);
 		// Force/sync every audio clip approaching...
@@ -1442,6 +1443,24 @@ bool qtractorAudioEngine::isExporting (void) const
 }
 
 
+// Last known export accessors.
+unsigned long qtractorAudioEngine::exportStart (void) const
+{
+	return m_iExportStart;
+}
+
+unsigned long qtractorAudioEngine::exportOffset (void) const
+{
+	return m_iExportOffset;
+}
+
+unsigned long qtractorAudioEngine::exportLength (void) const
+{
+	return (m_iExportEnd > m_iExportStart ? m_iExportEnd - m_iExportStart : 0);
+}
+
+
+
 // Audio-export method.
 bool qtractorAudioEngine::fileExport (
 	const QString& sExportPath, const QList<qtractorAudioBus *>& exportBuses,
@@ -1525,9 +1544,29 @@ bool qtractorAudioEngine::fileExport (
 		pAudioBus->setMonitor(false);
 	}
 
+	// Make sure all track latencies are reset and
+	// maximum track latency is acquainted as offset...
+	m_iExportOffset = 0;
+
+	for (qtractorTrack *pTrack = pSession->tracks().first();
+			pTrack; pTrack = pTrack->next()) {
+		if (!pTrack->isMute() && (!pSession->soloTracks() || pTrack->isSolo())) {
+			qtractorPluginList *pPluginList = pTrack->pluginList();
+			if (pPluginList) {
+				pPluginList->resetLatency();
+				const unsigned long iLatency = pPluginList->latency();
+				if (m_iExportOffset < iLatency)
+					m_iExportOffset = iLatency;
+			}
+		}
+	}
+
+	if (m_iExportOffset > m_iExportStart)
+		m_iExportOffset = m_iExportStart;
+
 	// Because we'll have to set the export conditions...
 	pSession->setLoop(0, 0);
-	pSession->setPlayHead(m_iExportStart);
+	pSession->setPlayHead(m_iExportStart - m_iExportOffset);
 
 	// Special initialization.
 	m_iBufferOffset = 0;
@@ -1582,8 +1621,8 @@ bool qtractorAudioEngine::fileExport (
 	m_pExportBuses = NULL;
 	m_pExportFile  = NULL;
 	m_pExportBuffer = NULL;
-	m_iExportStart = 0;
-	m_iExportEnd   = 0;
+//	m_iExportStart = 0;
+//	m_iExportEnd   = 0;
 	m_bExportDone  = true;
 
 	// Back to business..

src/qtractorAudioEngine.h

@@ -145,6 +145,11 @@ class qtractorAudioEngine : public qtractorEngine
 	void setExporting(bool bExporting);
 	bool isExporting() const;
 
+	// Last known export extents accessors.
+	unsigned long exportStart() const;
+	unsigned long exportOffset() const;
+	unsigned long exportLength() const;
+
 	// Audio-export method.
 	bool fileExport(const QString& sExportPath,
 		const QList<qtractorAudioBus *>& exportBuses,
@@ -289,6 +294,7 @@ class qtractorAudioEngine : public qtractorEngine
 	// Audio-export (in)active state.
 	volatile bool        m_bExporting;
 	qtractorAudioFile   *m_pExportFile;
+	unsigned long        m_iExportOffset;
 	unsigned long        m_iExportStart;
 	unsigned long        m_iExportEnd;
 	volatile bool        m_bExportDone;

src/qtractorExportForm.cpp

@@ -1,7 +1,7 @@
 // qtractorExportForm.cpp
 //
 /****************************************************************************
-   Copyright (C) 2005-2018, rncbc aka Rui Nuno Capela. All rights reserved.
+   Copyright (C) 2005-2019, rncbc aka Rui Nuno Capela. All rights reserved.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -282,7 +282,9 @@ void qtractorExportForm::accept (void)
 					if (pTracks && m_ui.AddTrackCheckBox->isChecked()) {
 						pTracks->addAudioTracks(
 							QStringList(sExportPath),
-							m_ui.ExportStartSpinBox->value(),
+							pAudioEngine->exportStart(),
+							pAudioEngine->exportOffset(),
+							pAudioEngine->exportLength(),
 							pTracks->currentTrack());
 					}
 					else pMainForm->addAudioFile(sExportPath);

src/qtractorExportForm.h

@@ -1,7 +1,7 @@
 // qtractorExportForm.h
 //
 /****************************************************************************
-   Copyright (C) 2005-2018, rncbc aka Rui Nuno Capela. All rights reserved.
+   Copyright (C) 2005-2019, rncbc aka Rui Nuno Capela. All rights reserved.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License

src/qtractorExportForm.ui

@@ -3,7 +3,7 @@
  <author>rncbc aka Rui Nuno Capela</author>
  <comment>qtractor - An Audio/MIDI multi-track sequencer.
 
-   Copyright (C) 2005-2018, rncbc aka Rui Nuno Capela. All rights reserved.
+   Copyright (C) 2005-2019, rncbc aka Rui Nuno Capela. All rights reserved.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License

src/qtractorMainForm.cpp

@@ -3833,7 +3833,7 @@ void qtractorMainForm::trackImportAudio (void)
 		const unsigned long iClipStart = m_pSession->editHead();
 		qtractorTrack *pTrack = m_pTracks->currentTrack();
 		m_pTracks->addAudioTracks(
-			m_pFiles->audioListView()->openFileNames(), iClipStart, pTrack);
+			m_pFiles->audioListView()->openFileNames(), iClipStart, 0, 0, pTrack);
 		m_pTracks->trackView()->ensureVisibleFrame(iClipStart);
 	}
 }

src/qtractorTrackList.cpp

@@ -1715,7 +1715,7 @@ void qtractorTrackList::dropEvent ( QDropEvent *pDropEvent )
 	if (!midi_files.isEmpty())
 		m_pTracks->addMidiTracks(midi_files, iClipStart, pAfterTrack);
 	if (!audio_files.isEmpty())
-		m_pTracks->addAudioTracks(audio_files, iClipStart, pAfterTrack);
+		m_pTracks->addAudioTracks(audio_files, iClipStart, 0, 0, pAfterTrack);
 
 	if (midi_files.isEmpty() && audio_files.isEmpty()) {
 		qtractorMainForm *pMainForm = qtractorMainForm::getInstance();

src/qtractorTracks.cpp

@@ -2711,7 +2711,8 @@ bool qtractorTracks::copyTrack ( qtractorTrack *pTrack )
 
 // Import Audio files into new tracks...
 bool qtractorTracks::addAudioTracks ( const QStringList& files,
-	unsigned long iClipStart, qtractorTrack *pAfterTrack )
+	unsigned long iClipStart, unsigned long iClipOffset,
+	unsigned long iClipLength, qtractorTrack *pAfterTrack )
 {
 	// Have we some?
 	if (files.isEmpty())
@@ -2763,6 +2764,10 @@ bool qtractorTracks::addAudioTracks ( const QStringList& files,
 		qtractorAudioClip *pAudioClip = new qtractorAudioClip(pTrack);
 		pAudioClip->setFilename(sPath);
 		pAudioClip->setClipStart(iClipStart);
+		if (iClipOffset > 0)
+			pAudioClip->setClipOffset(iClipOffset);
+		if (iClipLength > 0)
+			pAudioClip->setClipLength(iClipLength);
 		// Time to add the new track/clip into session;
 		// actuallly, this is when the given audio file gets open...
 		pTrack->addClip(pAudioClip);

src/qtractorTracks.h

@@ -69,7 +69,8 @@ class qtractorTracks : public QSplitter
 
 	// Import Audio/MIDI files into new tracks...
 	bool addAudioTracks(const QStringList& files,
-		unsigned long iClipStart, qtractorTrack *pAfterTrack = NULL);
+		unsigned long iClipStart, unsigned long iClipOffset = 0,
+		unsigned long iClipLength = 0, qtractorTrack *pAfterTrack = NULL);
 	bool addMidiTracks(const QStringList& files,
 		unsigned long iClipStart, qtractorTrack *pAfterTrack = NULL);
 	bool addMidiTrackChannel(const QString& sPath, int iTrackChannel,

src/translations/qtractor_cs.ts

@@ -34,16 +34,16 @@ Audio:	%1 channels, %2 Hz</source>
 	(posunutí výšky tónu v půltónech %1)</translation>
     </message>
     <message>
-        <location filename="../qtractorAudioEngine.cpp" line="2593"/>
-        <location filename="../qtractorAudioEngine.cpp" line="2877"/>
+        <location filename="../qtractorAudioEngine.cpp" line="2632"/>
+        <location filename="../qtractorAudioEngine.cpp" line="2916"/>
         <location filename="../qtractorMidiEngine.cpp" line="3994"/>
         <location filename="../qtractorMidiEngine.cpp" line="4559"/>
         <source>%1 In</source>
         <translation>%1 Vstup</translation>
     </message>
     <message>
-        <location filename="../qtractorAudioEngine.cpp" line="2602"/>
-        <location filename="../qtractorAudioEngine.cpp" line="2877"/>
+        <location filename="../qtractorAudioEngine.cpp" line="2641"/>
+        <location filename="../qtractorAudioEngine.cpp" line="2916"/>
         <location filename="../qtractorMidiEngine.cpp" line="4003"/>
         <location filename="../qtractorMidiEngine.cpp" line="4559"/>
         <source>%1 Out</source>
@@ -638,15 +638,15 @@ Stopa: &quot;%1&quot; Vstup: &quot;%2&quot; Výstup: &quot;%3&quot;</translation
         <translation>%1 Hlasitost</translation>
     </message>
     <message>
-        <location filename="../qtractorAudioEngine.cpp" line="2595"/>
-        <location filename="../qtractorAudioEngine.cpp" line="2604"/>
+        <location filename="../qtractorAudioEngine.cpp" line="2634"/>
+        <location filename="../qtractorAudioEngine.cpp" line="2643"/>
         <location filename="../qtractorTrack.cpp" line="695"/>
         <source>%1 Gain</source>
         <translation>%1 Zesílení</translation>
     </message>
     <message>
-        <location filename="../qtractorAudioEngine.cpp" line="2597"/>
-        <location filename="../qtractorAudioEngine.cpp" line="2606"/>
+        <location filename="../qtractorAudioEngine.cpp" line="2636"/>
+        <location filename="../qtractorAudioEngine.cpp" line="2645"/>
         <location filename="../qtractorMidiEngine.cpp" line="3998"/>
         <location filename="../qtractorMidiEngine.cpp" line="4007"/>
         <location filename="../qtractorTrack.cpp" line="698"/>
@@ -1826,12 +1826,12 @@ Chcete jej nahradit?</translation>
         <translation>Vyvedení zvukového souboru: &quot;%1&quot; právě začalo...</translation>
     </message>
     <message>
-        <location filename="../qtractorExportForm.cpp" line="291"/>
+        <location filename="../qtractorExportForm.cpp" line="293"/>
         <source>Audio file export: &quot;%1&quot; complete.</source>
         <translation>Vyvedení zvukového souboru: &quot;%1&quot; je hotovo.</translation>
     </message>
     <message>
-        <location filename="../qtractorExportForm.cpp" line="296"/>
+        <location filename="../qtractorExportForm.cpp" line="298"/>
         <source>Audio file export:
 
 &quot;%1&quot;
@@ -1844,17 +1844,17 @@ failed.</source>
 selhalo.</translation>
     </message>
     <message>
-        <location filename="../qtractorExportForm.cpp" line="322"/>
+        <location filename="../qtractorExportForm.cpp" line="324"/>
         <source>MIDI file export: &quot;%1&quot; started...</source>
         <translation>Vyvedení souboru MIDI: &quot;%1&quot; právě začalo...</translation>
     </message>
     <message>
-        <location filename="../qtractorExportForm.cpp" line="343"/>
+        <location filename="../qtractorExportForm.cpp" line="345"/>
         <source>MIDI file export: &quot;%1&quot; complete.</source>
         <translation>Vyvedení souboru MIDI: &quot;%1&quot; je hotovo.</translation>
     </message>
     <message>
-        <location filename="../qtractorExportForm.cpp" line="348"/>
+        <location filename="../qtractorExportForm.cpp" line="350"/>
         <source>MIDI file export:
 
 &quot;%1&quot;
@@ -1867,17 +1867,17 @@ failed.</source>
 selhalo.</translation>
     </message>
     <message>
-        <location filename="../qtractorExportForm.cpp" line="405"/>
+        <location filename="../qtractorExportForm.cpp" line="407"/>
         <source>Export %1 File</source>
         <translation>Vyvést %1 soubor</translation>
     </message>
     <message>
-        <location filename="../qtractorExportForm.cpp" line="408"/>
+        <location filename="../qtractorExportForm.cpp" line="410"/>
         <source>%1 files (*.%1)</source>
         <translation>%1 soborů (*.%1)</translation>
     </message>
     <message>
-        <location filename="../qtractorExportForm.cpp" line="409"/>
+        <location filename="../qtractorExportForm.cpp" line="411"/>
         <source>All files (*.*)</source>
         <translation>Všechny soubory (*.*)</translation>
     </message>
@@ -13170,21 +13170,21 @@ Jste si jistý?</translation>
     </message>
     <message>
         <location filename="../qtractorTracks.cpp" line="1009"/>
-        <location filename="../qtractorTracks.cpp" line="2782"/>
+        <location filename="../qtractorTracks.cpp" line="2787"/>
         <source>Audio file import &quot;%1&quot; on %2 %3.
 </source>
         <translation>Zavedení zvukového souboru &quot;%1&quot; do %2 %3.
 </translation>
     </message>
     <message>
         <location filename="../qtractorTracks.cpp" line="1014"/>
-        <location filename="../qtractorTracks.cpp" line="2787"/>
+        <location filename="../qtractorTracks.cpp" line="2792"/>
         <source>Audio file import: &quot;%1&quot;.</source>
         <translation>Zavedení zvukového souboru: &quot;%1&quot;.</translation>
     </message>
     <message>
         <location filename="../qtractorTracks.cpp" line="1044"/>
-        <location filename="../qtractorTracks.cpp" line="2973"/>
+        <location filename="../qtractorTracks.cpp" line="2978"/>
         <source>MIDI file import &quot;%1&quot; track-channel %2 on %3 %4.
 </source>
         <translation>Zavedení MIDI souboru: &quot;%1&quot;, stopa-kanál %2 %3 %4.
@@ -13271,20 +13271,20 @@ Jste si jistý?</translation>
         <translation>Odstranit rozsah stopy</translation>
     </message>
     <message>
-        <location filename="../qtractorTracks.cpp" line="2902"/>
+        <location filename="../qtractorTracks.cpp" line="2907"/>
         <source>MIDI file import &quot;%1&quot; on %2 %3.
 </source>
         <translation>Zavedení MIDI souboru &quot;%1&quot; do %2 %3.
 </translation>
     </message>
     <message>
-        <location filename="../qtractorTracks.cpp" line="2907"/>
+        <location filename="../qtractorTracks.cpp" line="2912"/>
         <source>MIDI file import: &quot;%1&quot;.</source>
         <translation>Zavedení MIDI souboru: &quot;%1&quot;.</translation>
     </message>
     <message>
         <location filename="../qtractorTracks.cpp" line="1050"/>
-        <location filename="../qtractorTracks.cpp" line="2979"/>
+        <location filename="../qtractorTracks.cpp" line="2984"/>
         <source>MIDI file import: &quot;%1&quot;, track-channel: %2.</source>
         <translation>Zavedení MIDI souboru: &quot;%1&quot;, stopa-kanál: %2.</translation>
     </message>