From: Good Guy <good1.2guy@gmail.com>
Date: Sat, 4 Jul 2020 03:55:56 +0000 (-0600)
Subject: pluginclient cr=apply in option value textbox, add loop_mode for vwdw
X-Git-Tag: 2020-07~10
X-Git-Url: https://cinelerra-gg.org/git/?a=commitdiff_plain;h=f5725c7e12def18fec49a295dad688652edaa4b3;p=goodguy%2Fcinelerra.git

pluginclient cr=apply in option value textbox, add loop_mode for vwdw
playback, add swap track up/dn, change reset_cache to use ref counts,
change gang_media,gang_chans pngs, add shift switch gang mode btn, tweak
mask_engine for high cpu count, change patchbay btn layout, fix track
redraw interrupted by index builder, fix scollable textbox resize
positioning, wsiwyg gang_master tweak.
---

diff --git a/cinelerra-5.1/cinelerra/assetpopup.C b/cinelerra-5.1/cinelerra/assetpopup.C
index 56832ca9..bc428164 100644
--- a/cinelerra-5.1/cinelerra/assetpopup.C
+++ b/cinelerra-5.1/cinelerra/assetpopup.C
@@ -951,8 +951,8 @@ int SnapshotMenuItem::handle_event()
 		command.realtime = 0;
 
 		RenderEngine render_engine(0, preferences, 0, 0);
-		CICache video_cache(preferences);
-		render_engine.set_vcache(&video_cache);
+		CICache *video_cache = new CICache(preferences);
+		render_engine.set_vcache(video_cache);
 		render_engine.arm_command(&command);
 
 		double position = edl->local_session->get_selectionstart(1);
@@ -962,6 +962,7 @@ int SnapshotMenuItem::handle_event()
 		if( !ret )
 			ret = file.write_video_buffer(1);
 		file.close_file();
+		video_cache->remove_user();
 	}
 	if( !ret ) {
 		asset->folder_no = AW_MEDIA_FOLDER;
diff --git a/cinelerra-5.1/cinelerra/cache.C b/cinelerra-5.1/cinelerra/cache.C
index 3a0d118e..80bf347b 100644
--- a/cinelerra-5.1/cinelerra/cache.C
+++ b/cinelerra-5.1/cinelerra/cache.C
@@ -37,7 +37,7 @@
 
 // edl came from a command which won't exist anymore
 CICache::CICache(Preferences *preferences)
- : List<CICacheItem>()
+ : Garbage("CICache"), List<CICacheItem>()
 {
 	this->preferences = preferences;
 	edl = 0;
@@ -69,11 +69,11 @@ File* CICache::check_out(Asset *asset, EDL *edl, int block)
 	CICacheItem *current = 0;
 	long tid = (long)Thread::get_self();
 	if( !tid ) tid = 1;
+	total_lock->lock("CICache::check_out");
+	add_user();
 
-	while(1)
-	{
+	while( users > 1 ) {
 		File *file = 0;
-		total_lock->lock("CICache::check_out");
 // Scan directory for item
 		current = first;
 		while(current && strcmp(current->asset->path, asset->path) != 0)
@@ -108,12 +108,21 @@ File* CICache::check_out(Asset *asset, EDL *edl, int block)
 			else
 				current = 0;
 		}
-		total_lock->unlock();
 		if( current || !file || !block ) break;
 // Try again after blocking
+		total_lock->unlock();
 		check_out_lock->lock("CICache::check_out");
+		total_lock->lock("CICache::check_out");
+	}
+
+// cache deleted during checkout, destroy this
+	if( users == 1 ) {
+		remove_user();
+		return 0;
 	}
 
+	remove_user();
+	total_lock->unlock();
 //printf("check out %p %lx %s\n", current, tid, asset->path);
 	return current ? current->file : 0;
 }
diff --git a/cinelerra-5.1/cinelerra/cache.h b/cinelerra-5.1/cinelerra/cache.h
index 8ab4457f..15329e69 100644
--- a/cinelerra-5.1/cinelerra/cache.h
+++ b/cinelerra-5.1/cinelerra/cache.h
@@ -61,7 +61,7 @@ private:
 	CICache *cache;
 };
 
-class CICache : public List<CICacheItem>
+class CICache : public Garbage, public List<CICacheItem>
 {
 public:
 	CICache(Preferences *preferences);
diff --git a/cinelerra-5.1/cinelerra/editpanel.C b/cinelerra-5.1/cinelerra/editpanel.C
index ddc7595a..41394277 100644
--- a/cinelerra-5.1/cinelerra/editpanel.C
+++ b/cinelerra-5.1/cinelerra/editpanel.C
@@ -1355,10 +1355,11 @@ void EditPanelGangTracks::update(int gang)
 int EditPanelGangTracks::handle_event()
 {
 	int gang = mwindow->edl->session->gang_tracks;
-	switch( gang ) {
-	case GANG_NONE:      gang = GANG_CHANNELS;  break;
-	case GANG_CHANNELS:  gang = GANG_MEDIA;     break;
-	case GANG_MEDIA:     gang = GANG_NONE;      break;
+	if( !shift_down() ) {
+		if( ++gang > GANG_MEDIA ) gang = GANG_NONE;
+	}
+	else {
+		if( --gang < GANG_NONE ) gang = GANG_MEDIA;
 	}
 	update(gang);
 	panel->panel_set_gang_tracks(gang);
diff --git a/cinelerra-5.1/cinelerra/fileref.C b/cinelerra-5.1/cinelerra/fileref.C
index ab8ecd7f..ade91c48 100644
--- a/cinelerra-5.1/cinelerra/fileref.C
+++ b/cinelerra-5.1/cinelerra/fileref.C
@@ -101,8 +101,8 @@ int FileREF::close_file()
 	ref = 0;
 	delete render_engine;  render_engine = 0;
 	delete command;  command = 0;
-	delete acache;   acache = 0;
-	delete vcache;   vcache = 0;
+	if( acache ) { acache->remove_user();  acache = 0; }
+	if( vcache ) { vcache->remove_user();  vcache = 0; }
 	delete temp;     temp = 0;
 	for( int i=0; i<MAX_CHANNELS; ++i ) {
 		delete samples[i];  samples[i] = 0;
diff --git a/cinelerra-5.1/cinelerra/indexfile.C b/cinelerra-5.1/cinelerra/indexfile.C
index 0e6469e2..b8c0af69 100644
--- a/cinelerra-5.1/cinelerra/indexfile.C
+++ b/cinelerra-5.1/cinelerra/indexfile.C
@@ -374,9 +374,10 @@ void IndexFile::close_source()
 
 	delete render_engine;
 	render_engine = 0;
-
-	delete cache;
-	cache = 0;
+	if( cache ) {
+		cache->remove_user();
+		cache = 0;
+	}
 }
 
 int64_t IndexFile::get_required_scale()
diff --git a/cinelerra-5.1/cinelerra/mainmenu.C b/cinelerra-5.1/cinelerra/mainmenu.C
index de902545..64e90885 100644
--- a/cinelerra-5.1/cinelerra/mainmenu.C
+++ b/cinelerra-5.1/cinelerra/mainmenu.C
@@ -209,6 +209,8 @@ void MainMenu::create_objects()
 	trackmenu->add_item(new DeleteFirstTrack(mwindow));
 	trackmenu->add_item(new DeleteLastTrack(mwindow));
 	trackmenu->add_item(new ConcatenateTracks(mwindow));
+	trackmenu->add_item(new SwapTracksUp(mwindow));
+	trackmenu->add_item(new SwapTracksDown(mwindow));
 	AppendTracks *append_tracks;
 	trackmenu->add_item(append_tracks = new AppendTracks(mwindow));
 	append_tracks->create_objects();
@@ -1290,6 +1292,34 @@ int MoveTracksDown::handle_event()
 }
 
 
+SwapTracksUp::SwapTracksUp(MWindow *mwindow)
+ : BC_MenuItem(_("Swap tracks up"), 0, UP)
+{
+	this->mwindow = mwindow;
+	set_shift();
+}
+
+int SwapTracksUp::handle_event()
+{
+	if( mwindow->session->current_operation == NO_OPERATION )
+		mwindow->swap_tracks_up();
+	return 1;
+}
+
+SwapTracksDown::SwapTracksDown(MWindow *mwindow)
+ : BC_MenuItem(_("Swap tracks down"), 0, DOWN)
+{
+	set_shift(); this->mwindow = mwindow;
+}
+
+int SwapTracksDown::handle_event()
+{
+	if( mwindow->session->current_operation == NO_OPERATION )
+		mwindow->swap_tracks_down();
+	return 1;
+}
+
+
 
 
 ConcatenateTracks::ConcatenateTracks(MWindow *mwindow)
diff --git a/cinelerra-5.1/cinelerra/mainmenu.h b/cinelerra-5.1/cinelerra/mainmenu.h
index 681ba384..bf14888f 100644
--- a/cinelerra-5.1/cinelerra/mainmenu.h
+++ b/cinelerra-5.1/cinelerra/mainmenu.h
@@ -655,6 +655,22 @@ public:
 	MWindow *mwindow;
 };
 
+class SwapTracksUp : public BC_MenuItem
+{
+public:
+	SwapTracksUp(MWindow *mwindow);
+	int handle_event();
+	MWindow *mwindow;
+};
+
+class SwapTracksDown : public BC_MenuItem
+{
+public:
+	SwapTracksDown(MWindow *mwindow);
+	int handle_event();
+	MWindow *mwindow;
+};
+
 class DeleteTracks : public BC_MenuItem
 {
 public:
diff --git a/cinelerra-5.1/cinelerra/maskengine.C b/cinelerra-5.1/cinelerra/maskengine.C
index 564d1fe8..efe37ccc 100644
--- a/cinelerra-5.1/cinelerra/maskengine.C
+++ b/cinelerra-5.1/cinelerra/maskengine.C
@@ -301,7 +301,6 @@ void MaskUnit::process_package(LoadPackage *package)
 	pkg = (MaskPackage*)package;
 	start_x = pkg->start_x;  end_x = pkg->end_x;
 	start_y = pkg->start_y;  end_y = pkg->end_y;
-	if( start_y >= end_y ) return;
 	MaskEdge *edge = engine->edge;
 	float r = engine->r, v = engine->v;
 	VFrame *in = engine->in;
diff --git a/cinelerra-5.1/cinelerra/module.C b/cinelerra-5.1/cinelerra/module.C
index 01f3095f..c6990275 100644
--- a/cinelerra-5.1/cinelerra/module.C
+++ b/cinelerra-5.1/cinelerra/module.C
@@ -59,7 +59,6 @@ Module::Module(RenderEngine *renderengine,
 	nested_edl = 0;
 	nested_renderengine = 0;
 	nested_command = 0;
-	private_cache = 0;
 	cache = 0;
 }
 
@@ -86,7 +85,6 @@ Module::~Module()
 
 	delete nested_renderengine;
 	delete nested_command;
-	if(private_cache) delete cache;
 }
 
 void Module::create_objects()
diff --git a/cinelerra-5.1/cinelerra/module.h b/cinelerra-5.1/cinelerra/module.h
index 85b50677..1203f3b6 100644
--- a/cinelerra-5.1/cinelerra/module.h
+++ b/cinelerra-5.1/cinelerra/module.h
@@ -82,8 +82,6 @@ public:
 
 // CICache used during effect & nested EDL
 	CICache *cache;
-// If the cache was allocated by the module
-	int private_cache;
 // Parent EDL of this module when used for effect rendering.
 // Used by APluginArray.
 	EDL *edl;
diff --git a/cinelerra-5.1/cinelerra/mwindow.C b/cinelerra-5.1/cinelerra/mwindow.C
index 702bd8a7..1466b445 100644
--- a/cinelerra-5.1/cinelerra/mwindow.C
+++ b/cinelerra-5.1/cinelerra/mwindow.C
@@ -349,8 +349,9 @@ MWindow::~MWindow()
 	delete gui;		gui = 0;
 	delete mainindexes;     mainindexes = 0;
 	delete mainprogress;    mainprogress = 0;
-	delete audio_cache;     audio_cache = 0;  // delete the cache after the assets
-	delete video_cache;     video_cache = 0;  // delete the cache after the assets
+ // delete the caches after the assets
+	if( audio_cache ) { audio_cache->remove_user();  audio_cache = 0; }
+	if( video_cache ) { video_cache->remove_user();  video_cache = 0; }
 	delete frame_cache;     frame_cache = 0;
 	delete wave_cache;      wave_cache = 0;
 	delete plugin_guis;     plugin_guis = 0;
diff --git a/cinelerra-5.1/cinelerra/mwindow.h b/cinelerra-5.1/cinelerra/mwindow.h
index 049694ed..8f80280f 100644
--- a/cinelerra-5.1/cinelerra/mwindow.h
+++ b/cinelerra-5.1/cinelerra/mwindow.h
@@ -500,6 +500,10 @@ public:
 	void move_tracks_down();
 	void move_track_up(Track *track);
 	void move_tracks_up();
+	void swap_track_down(Track *track);
+	void swap_tracks_down();
+	void swap_track_up(Track *track);
+	void swap_tracks_up();
 	void mute_selection();
 	void new_folder(const char *new_folder, int is_clips);
 	void delete_folder(char *folder);
diff --git a/cinelerra-5.1/cinelerra/mwindowedit.C b/cinelerra-5.1/cinelerra/mwindowedit.C
index 5e4b797b..6242b788 100644
--- a/cinelerra-5.1/cinelerra/mwindowedit.C
+++ b/cinelerra-5.1/cinelerra/mwindowedit.C
@@ -1205,6 +1205,56 @@ void MWindow::move_tracks_up()
 }
 
 
+void MWindow::swap_track_down(Track *track)
+{
+	undo_before();
+	edl->tracks->swap_track_down(track);
+	save_backup();
+	undo_after(_("swap track down"), LOAD_ALL);
+
+	restart_brender();
+	gui->update(1, NORMAL_DRAW, 0, 0, 1, 0, 0);
+	sync_parameters(CHANGE_EDL);
+	save_backup();
+}
+
+void MWindow::swap_tracks_down()
+{
+	undo_before();
+	edl->tracks->swap_tracks_down();
+	save_backup();
+	undo_after(_("swap tracks down"), LOAD_ALL);
+
+	restart_brender();
+	gui->update(1, NORMAL_DRAW, 0, 0, 1, 0, 0);
+	sync_parameters(CHANGE_EDL);
+	save_backup();
+}
+
+void MWindow::swap_track_up(Track *track)
+{
+	undo_before();
+	edl->tracks->swap_track_up(track);
+	save_backup();
+	undo_after(_("swap track up"), LOAD_ALL);
+	restart_brender();
+	gui->update(1, NORMAL_DRAW, 0, 0, 1, 0, 0);
+	sync_parameters(CHANGE_EDL);
+	save_backup();
+}
+
+void MWindow::swap_tracks_up()
+{
+	undo_before();
+	edl->tracks->swap_tracks_up();
+	save_backup();
+	undo_after(_("swap tracks up"), LOAD_ALL);
+	restart_brender();
+	gui->update(1, NORMAL_DRAW, 0, 0, 1, 0, 0);
+	sync_parameters(CHANGE_EDL);
+}
+
+
 void MWindow::mute_selection()
 {
 	double start = edl->local_session->get_selectionstart();
diff --git a/cinelerra-5.1/cinelerra/packagerenderer.C b/cinelerra-5.1/cinelerra/packagerenderer.C
index d60a5be0..a76d736a 100644
--- a/cinelerra-5.1/cinelerra/packagerenderer.C
+++ b/cinelerra-5.1/cinelerra/packagerenderer.C
@@ -101,8 +101,10 @@ PackageRenderer::PackageRenderer()
 PackageRenderer::~PackageRenderer()
 {
 	delete command;
-	delete audio_cache;
-	delete video_cache;
+	if( audio_cache )
+		audio_cache->remove_user();
+	if( video_cache )
+		video_cache->remove_user();
 	delete vconfig;
 	delete aconfig;
 	delete timer;
diff --git a/cinelerra-5.1/cinelerra/patchgui.C b/cinelerra-5.1/cinelerra/patchgui.C
index dc518b5c..f99601c1 100644
--- a/cinelerra-5.1/cinelerra/patchgui.C
+++ b/cinelerra-5.1/cinelerra/patchgui.C
@@ -60,11 +60,11 @@ PatchGUI::PatchGUI(MWindow *mwindow,
 	record = 0;
 	play = 0;
 //	automate = 0;
-	gang = 0;
 	draw = 0;
 	mute = 0;
-	zoom = 0;
+	gang = 0;
 	master = 0;
+	zoom = 0;
 	expand = 0;
 	nudge = 0;
 	mix = 0;
@@ -79,11 +79,11 @@ PatchGUI::~PatchGUI()
 	delete record;
 	delete play;
 //	delete automate;
-	delete gang;
 	delete draw;
 	delete mute;
-	delete zoom;
+	delete gang;
 	delete master;
+	delete zoom;
 	delete expand;
 	delete nudge;
 	delete mix;
@@ -117,15 +117,16 @@ int PatchGUI::reposition(int x, int y)
 			x1 += record->get_w();
 //			automate->reposition_window(x1, y1 + y);
 //			x1 += automate->get_w();
-			gang->reposition_window(gang->get_x(), y1 + y);
-			x1 += gang->get_w();
 			draw->reposition_window(draw->get_x(), y1 + y);
 			x1 += draw->get_w();
 			mute->reposition_window(mute->get_x(), y1 + y);
 			x1 += mute->get_w();
-			zoom->reposition_window(zoom->get_x(), y1 + y);
-			x1 += zoom->get_w();
+			gang->reposition_window(gang->get_x(), y1 + y);
+			x1 += gang->get_w();
 			master->reposition_window(master->get_x(), y1 + y);
+			x1 += master->get_w();
+			zoom->reposition_window(zoom->get_x(), y1 + y);
+//			x1 += zoom->get_w();
 		}
 		y1 += mwindow->theme->play_h;
 	}
@@ -177,18 +178,19 @@ int PatchGUI::update(int x, int y)
 		if( h < y2 ) {
 			delete play;    play = 0;
 			delete record;  record = 0;
-			delete gang;    gang = 0;
 			delete draw;    draw = 0;
 			delete mute;    mute = 0;
-			delete zoom;    zoom = 0;
+			delete gang;    gang = 0;
 			delete master;  master = 0;
+			delete zoom;    zoom = 0;
 		}
 		else {
 			play->update(track->play);
 			record->update(track->armed);
-			gang->update(track->ganged);
 			draw->update(track->draw);
 			mute->update(mwindow->get_int_auto(this, AUTOMATION_MUTE)->value);
+			gang->update(track->ganged);
+			master->update(track->master);
 		}
 	}
 	else if( h >= y2 ) {
@@ -197,15 +199,16 @@ int PatchGUI::update(int x, int y)
 		x1 += play->get_w();
 		patchbay->add_subwindow(record = new RecordPatch(mwindow, this, x1 + x, y1 + y));
 		x1 += record->get_w();
-		patchbay->add_subwindow(gang = new GangPatch(mwindow, this, x1 + x, y1 + y));
-		x1 += gang->get_w();
 		patchbay->add_subwindow(draw = new DrawPatch(mwindow, this, x1 + x, y1 + y));
 		x1 += draw->get_w();
 		patchbay->add_subwindow(mute = new MutePatch(mwindow, this, x1 + x, y1 + y));
 		x1 += mute->get_w();
-		patchbay->add_subwindow(zoom = new ZoomPatch(mwindow, this, x1 + x, y1 + y));
-		x1 += zoom->get_w();
+		patchbay->add_subwindow(gang = new GangPatch(mwindow, this, x1 + x, y1 + y));
+		x1 += gang->get_w();
 		patchbay->add_subwindow(master = new MasterPatch(mwindow, this, x1 + x, y1 + y));
+		x1 += master->get_w();
+		patchbay->add_subwindow(zoom = new ZoomPatch(mwindow, this, x1 + x, y1 + y));
+//		x1 += zoom->get_w();
 	}
 	if( play )
 		y1 = y2;
diff --git a/cinelerra-5.1/cinelerra/playbackengine.C b/cinelerra-5.1/cinelerra/playbackengine.C
index 8ce98234..82bd7bb6 100644
--- a/cinelerra-5.1/cinelerra/playbackengine.C
+++ b/cinelerra-5.1/cinelerra/playbackengine.C
@@ -85,8 +85,10 @@ PlaybackEngine::~PlaybackEngine()
 	Thread::join();
 	delete preferences;
 	delete_render_engine();
-	delete audio_cache;
-	delete video_cache;
+	if( audio_cache )
+		audio_cache->remove_user();
+	if( video_cache )
+		video_cache->remove_user();
 	delete tracking_lock;
 	delete tracking_done;
 	delete pause_lock;
@@ -162,10 +164,12 @@ void PlaybackEngine::wait_render_engine()
 
 void PlaybackEngine::create_cache()
 {
-	if(audio_cache) { delete audio_cache;  audio_cache = 0; }
-	if(video_cache) { delete video_cache;  video_cache = 0; }
-	if(!audio_cache) audio_cache = new CICache(preferences);
-	if(!video_cache) video_cache = new CICache(preferences);
+	if( audio_cache )
+		audio_cache->remove_user();
+	if( video_cache )
+		video_cache->remove_user();
+	audio_cache = new CICache(preferences);
+	video_cache = new CICache(preferences);
 }
 
 
diff --git a/cinelerra-5.1/cinelerra/playtransport.C b/cinelerra-5.1/cinelerra/playtransport.C
index d9d9a48a..8caf4678 100644
--- a/cinelerra-5.1/cinelerra/playtransport.C
+++ b/cinelerra-5.1/cinelerra/playtransport.C
@@ -30,6 +30,7 @@
 #include "preferences.h"
 #include "shuttle.h"
 #include "theme.h"
+#include "tracks.h"
 #include "transportque.h"
 #include "vframe.h"
 
@@ -329,21 +330,14 @@ EDL* PlayTransport::get_edl()
 	return mwindow->edl;
 }
 
-int PlayTransport::pause_transport()
+int PlayTransport::set_transport(int mode)
 {
-	if(active_button) active_button->set_mode(PLAY_MODE);
-	return 0;
-}
-
-
-int PlayTransport::reset_transport()
-{
-	fast_reverse->set_mode(PLAY_MODE);
-	reverse_play->set_mode(PLAY_MODE);
-	forward_play->set_mode(PLAY_MODE);
-	frame_reverse_play->set_mode(PLAY_MODE);
-	frame_forward_play->set_mode(PLAY_MODE);
-	fast_play->set_mode(PLAY_MODE);
+	fast_reverse->set_mode(mode);
+	reverse_play->set_mode(mode);
+	forward_play->set_mode(mode);
+	frame_reverse_play->set_mode(mode);
+	frame_forward_play->set_mode(mode);
+	fast_play->set_mode(mode);
 	return 0;
 }
 
@@ -358,10 +352,29 @@ PTransportButton::~PTransportButton()
 {
 }
 
-int PTransportButton::set_mode(int mode)
+void PTransportButton::set_mode(int mode)
 {
 	this->mode = mode;
-	return 0;
+}
+
+void PTransportButton::loop_mode(int dir)
+{
+	if( mode != LOOP_MODE ) return;
+	EDL *edl = transport->get_edl();
+	if( !edl ) return;
+	PlaybackEngine *engine = transport->engine;
+	if( !engine || engine->is_playing_back ) return;
+	double position = engine->get_tracking_position();
+	switch( dir ) {
+	case PLAY_FORWARD:
+		if( position >= edl->tracks->total_playable_length() )
+			transport->goto_start();
+		break;
+	case PLAY_REVERSE:
+		if( position <= 0 )
+			transport->goto_end();
+		break;
+	}
 }
 
 int PTransportButton::play_command(const char *lock_msg, int command)
@@ -398,6 +411,7 @@ FastReverseButton::FastReverseButton(MWindow *mwindow, PlayTransport *transport,
 }
 int FastReverseButton::handle_event()
 {
+	loop_mode(PLAY_REVERSE);
 	return play_command("FastReverseButton::handle_event", FAST_REWIND);
 }
 
@@ -410,6 +424,7 @@ ReverseButton::ReverseButton(MWindow *mwindow, PlayTransport *transport, int x,
 }
 int ReverseButton::handle_event()
 {
+	loop_mode(PLAY_REVERSE);
 	return play_command("ReverseButton::handle_event", NORMAL_REWIND);
 }
 
@@ -437,6 +452,7 @@ PlayButton::PlayButton(MWindow *mwindow, PlayTransport *transport, int x, int y)
 }
 int PlayButton::handle_event()
 {
+	loop_mode(PLAY_FORWARD);
 	return play_command("PlayButton::handle_event", NORMAL_FWD);
 }
 
@@ -466,6 +482,7 @@ FastPlayButton::FastPlayButton(MWindow *mwindow, PlayTransport *transport, int x
 }
 int FastPlayButton::handle_event()
 {
+	loop_mode(PLAY_FORWARD);
 	return play_command("FastPlayButton::handle_event", FAST_FWD);
 }
 
diff --git a/cinelerra-5.1/cinelerra/playtransport.h b/cinelerra-5.1/cinelerra/playtransport.h
index 20d98999..791a801f 100644
--- a/cinelerra-5.1/cinelerra/playtransport.h
+++ b/cinelerra-5.1/cinelerra/playtransport.h
@@ -29,8 +29,7 @@
 #include "playtransport.inc"
 
 #define PLAY_MODE 0
-#define PAUSE_MODE 1
-#define PAUSEDOWN_MODE 2
+#define LOOP_MODE 1
 
 class PlayTransport
 {
@@ -62,8 +61,7 @@ public:
 // speed - play speed for SLOW/FAST playback, zero defaults to slow=.5,fast=2.
 	void handle_transport(int command, int wait_tracking=0,
 		int use_inout=0, int toggle_audio=0, int loop_play=0, float speed=0);
-	int pause_transport();
-	int reset_transport();
+	int set_transport(int mode);
 	int get_w();
 	int is_stopped();
 // Get the EDL to play back with default to mwindow->edl
@@ -100,7 +98,8 @@ class PTransportButton : public BC_Button
 public:
 	PTransportButton(MWindow *mwindow, PlayTransport *transport, int x, int y, VFrame **data);
 	virtual ~PTransportButton();
-	virtual int set_mode(int mode);
+	void set_mode(int mode);
+	void loop_mode(int dir);
 	int play_command(const char *lock_msg, int command);
 
 	int mode;
diff --git a/cinelerra-5.1/cinelerra/pluginarray.C b/cinelerra-5.1/cinelerra/pluginarray.C
index a04e9858..7d971a69 100644
--- a/cinelerra-5.1/cinelerra/pluginarray.C
+++ b/cinelerra-5.1/cinelerra/pluginarray.C
@@ -266,8 +266,10 @@ int PluginArray::stop_plugins()
 			values[i]->close_plugin();
 		}
 	}
-
-	delete cache;
+	if( cache ) {
+		cache->remove_user();
+		cache = 0;
+	}
 	return 0;
 }
 
diff --git a/cinelerra-5.1/cinelerra/pluginfclient.C b/cinelerra-5.1/cinelerra/pluginfclient.C
index 2cc12d62..486d7319 100644
--- a/cinelerra-5.1/cinelerra/pluginfclient.C
+++ b/cinelerra-5.1/cinelerra/pluginfclient.C
@@ -8,6 +8,7 @@
 #include "bcwindowbase.h"
 #include "bctitle.h"
 #include "cstrdup.h"
+#include "keys.h"
 #include "language.h"
 #include "mwindow.h"
 #include "pluginfclient.h"
@@ -186,6 +187,10 @@ PluginFClientText::
 
 int PluginFClientText::handle_event()
 {
+	if( get_keypress() == RETURN ) {
+		fwin->update();
+		activate();
+	}
 	return 0;
 }
 
diff --git a/cinelerra-5.1/cinelerra/proxy.C b/cinelerra-5.1/cinelerra/proxy.C
index 34f833fb..fff64f37 100644
--- a/cinelerra-5.1/cinelerra/proxy.C
+++ b/cinelerra-5.1/cinelerra/proxy.C
@@ -657,7 +657,8 @@ ProxyClient::ProxyClient(MWindow *mwindow,
 ProxyClient::~ProxyClient()
 {
 	delete render_engine;
-	delete video_cache;
+	if( video_cache )
+		video_cache->remove_user();
 	delete src_file;
 }
 
diff --git a/cinelerra-5.1/cinelerra/render.C b/cinelerra-5.1/cinelerra/render.C
index 746b4187..741d6ff3 100644
--- a/cinelerra-5.1/cinelerra/render.C
+++ b/cinelerra-5.1/cinelerra/render.C
@@ -882,8 +882,8 @@ printf("Render::render_single: Session finished.\n");
 		mwindow->restart_brender();
 	if( farm_server ) delete farm_server;
 	delete command;
-	delete audio_cache;
-	delete video_cache;
+	audio_cache->remove_user();
+	video_cache->remove_user();
 // Must delete packages after server
 	delete render->packages;
 
diff --git a/cinelerra-5.1/cinelerra/resourcethread.C b/cinelerra-5.1/cinelerra/resourcethread.C
index 308e902d..4c28c032 100644
--- a/cinelerra-5.1/cinelerra/resourcethread.C
+++ b/cinelerra-5.1/cinelerra/resourcethread.C
@@ -670,10 +670,11 @@ void ResourceThread::stop()
 	video_thread->stop();
 }
 
-void ResourceThread::reset(int pane_number)
+void ResourceThread::reset(int pane_number, int indexes_only)
 {
 	audio_thread->reset(pane_number);
-	video_thread->reset(pane_number);
+	if( !indexes_only )
+		video_thread->reset(pane_number);
 }
 
 void ResourceThread::close_indexable(Indexable *idxbl)
diff --git a/cinelerra-5.1/cinelerra/resourcethread.h b/cinelerra-5.1/cinelerra/resourcethread.h
index 1f8fada5..8434553d 100644
--- a/cinelerra-5.1/cinelerra/resourcethread.h
+++ b/cinelerra-5.1/cinelerra/resourcethread.h
@@ -205,7 +205,7 @@ public:
 
 	void run();
 	void stop();
-	void reset(int pane_number);
+	void reset(int pane_number, int indexes_only);
 	void close_indexable(Indexable*);
 
 	MWindow *mwindow;
diff --git a/cinelerra-5.1/cinelerra/track.C b/cinelerra-5.1/cinelerra/track.C
index 264bd95f..9e86481c 100644
--- a/cinelerra-5.1/cinelerra/track.C
+++ b/cinelerra-5.1/cinelerra/track.C
@@ -1793,10 +1793,25 @@ void Track::set_camera(float x, float y, float z)
 
 Track *Track::gang_master()
 {
-	if( edl->session->gang_tracks == GANG_NONE ) return this;
 	Track *track = this;
-	while( track && !track->master ) track = track->previous;
-	return !track ? tracks->first : track;
+	switch( edl->session->gang_tracks ) {
+	case GANG_NONE:
+		return track;
+	case GANG_CHANNELS: {
+		Track *current = track;
+		int data_type = track->data_type;
+		while( current && !track->master ) {
+			if( !(current = current->previous) ) break;
+			if( current->data_type == data_type ) track = current;
+			if( track->master ) break;
+		}
+		break; }
+	case GANG_MEDIA: {
+		while( track && !track->master ) track = track->previous;
+		break; }
+	}
+	if( !track ) track = tracks->first;
+	return track;
 }
 
 int Track::is_hidden()
@@ -1815,6 +1830,7 @@ int Track::is_armed()
 {
 	return gang_master()->armed;
 }
+
 int Track::is_ganged()
 {
 	return gang_master()->ganged;
diff --git a/cinelerra-5.1/cinelerra/trackcanvas.C b/cinelerra-5.1/cinelerra/trackcanvas.C
index dda88761..c0f8f995 100644
--- a/cinelerra-5.1/cinelerra/trackcanvas.C
+++ b/cinelerra-5.1/cinelerra/trackcanvas.C
@@ -781,7 +781,7 @@ void TrackCanvas::draw_resources(int mode,
 
 	if(debug) PRINT_TRACE
 	if(mode != IGNORE_THREAD)
-		gui->resource_thread->reset(pane->number);
+		gui->resource_thread->reset(pane->number, indexes_only);
 
 // Search every edit
 	for(Track *current = mwindow->edl->tracks->first;
@@ -3902,7 +3902,7 @@ int TrackCanvas::render_handle_frame(EDL *edl, int64_t pos, int mode)
 			!vrender->process_buffer(&vlt, left, 0) &&
 			!vrender->process_buffer(&vrt, pos , 0) ? 0 : 1;
 		delete render_engine;
-		delete video_cache;
+		video_cache->remove_user();
 		mwindow->cwindow->gui->lock_window("TrackCanvas::render_handle_frame 0");
 		Canvas *canvas = mwindow->cwindow->gui->canvas;
 		float ox1, oy1, ox2, oy2, cx1, cy1, cx2, cy2;
diff --git a/cinelerra-5.1/cinelerra/trackpopup.C b/cinelerra-5.1/cinelerra/trackpopup.C
index 077fa9cb..6dd1512e 100644
--- a/cinelerra-5.1/cinelerra/trackpopup.C
+++ b/cinelerra-5.1/cinelerra/trackpopup.C
@@ -72,6 +72,8 @@ void TrackPopup::create_objects()
 	add_item(new TrackPopupShow(mwindow, this));
 	add_item(new TrackPopupUserTitle(mwindow, this));
 	add_item(new TrackPopupTitleColor(mwindow, this));
+	add_item(new TrackSwapUp(mwindow, this));
+	add_item(new TrackSwapDown(mwindow, this));
 	resize_option = 0;
 	matchsize_option = 0;
 }
@@ -135,8 +137,6 @@ int TrackMoveUp::handle_event()
 	return 1;
 }
 
-
-
 TrackMoveDown::TrackMoveDown(MWindow *mwindow, TrackPopup *popup)
  : BC_MenuItem(_("Move down"))
 {
@@ -153,6 +153,37 @@ int TrackMoveDown::handle_event()
 }
 
 
+TrackSwapUp::TrackSwapUp(MWindow *mwindow, TrackPopup *popup)
+ : BC_MenuItem(_("Swap up"))
+{
+	this->mwindow = mwindow;
+	this->popup = popup;
+}
+TrackSwapUp::~TrackSwapUp()
+{
+}
+int TrackSwapUp::handle_event()
+{
+	mwindow->swap_track_up(popup->track);
+	return 1;
+}
+
+TrackSwapDown::TrackSwapDown(MWindow *mwindow, TrackPopup *popup)
+ : BC_MenuItem(_("Swap down"))
+{
+	this->mwindow = mwindow;
+	this->popup = popup;
+}
+TrackSwapDown::~TrackSwapDown()
+{
+}
+int TrackSwapDown::handle_event()
+{
+	mwindow->swap_track_down(popup->track);
+	return 1;
+}
+
+
 TrackPopupResize::TrackPopupResize(MWindow *mwindow, TrackPopup *popup)
  : BC_MenuItem(_("Resize track..."))
 {
diff --git a/cinelerra-5.1/cinelerra/trackpopup.h b/cinelerra-5.1/cinelerra/trackpopup.h
index b8042f34..b44a62d5 100644
--- a/cinelerra-5.1/cinelerra/trackpopup.h
+++ b/cinelerra-5.1/cinelerra/trackpopup.h
@@ -130,6 +130,30 @@ public:
 	TrackPopup *popup;
 };
 
+class TrackSwapUp : public BC_MenuItem
+{
+public:
+	TrackSwapUp(MWindow *mwindow, TrackPopup *popup);
+	~TrackSwapUp();
+
+	int handle_event();
+
+	MWindow *mwindow;
+	TrackPopup *popup;
+};
+
+class TrackSwapDown : public BC_MenuItem
+{
+public:
+	TrackSwapDown(MWindow *mwindow, TrackPopup *popup);
+	~TrackSwapDown();
+
+	int handle_event();
+
+	MWindow *mwindow;
+	TrackPopup *popup;
+};
+
 class TrackPopupFindAsset : public BC_MenuItem
 {
 public:
diff --git a/cinelerra-5.1/cinelerra/tracks.h b/cinelerra-5.1/cinelerra/tracks.h
index 3d676713..dd1a92f6 100644
--- a/cinelerra-5.1/cinelerra/tracks.h
+++ b/cinelerra-5.1/cinelerra/tracks.h
@@ -73,10 +73,14 @@ public:
 	void equivalent_output(Tracks *tracks, double *result);
 
 	void move_tracks(Track *src, Track *dst, int n);
-	int move_track_up(Track *track);        // move recordable tracks up
-	int move_track_down(Track *track);      // move recordable tracks down
-	int move_tracks_up();                   // move recordable tracks up
-	int move_tracks_down();                 // move recordable tracks down
+	int move_track_up(Track *track);
+	int move_track_down(Track *track);
+	int move_tracks_up();
+	int move_tracks_down();
+	int swap_track_up(Track *track);
+	int swap_track_down(Track *track);
+	int swap_tracks_up();
+	int swap_tracks_down();
 	void paste_audio_transition(PluginServer *server);
 	void paste_video_transition(PluginServer *server, int first_track = 0);
 
diff --git a/cinelerra-5.1/cinelerra/tracksedit.C b/cinelerra-5.1/cinelerra/tracksedit.C
index f1684204..29584b23 100644
--- a/cinelerra-5.1/cinelerra/tracksedit.C
+++ b/cinelerra-5.1/cinelerra/tracksedit.C
@@ -922,6 +922,61 @@ int Tracks::move_tracks_down()
 }
 
 
+int Tracks::swap_track_up(Track *track)
+{
+	Track *next_track = track->previous;
+	if(!next_track) next_track = last;
+
+	change_modules(number_of(track), number_of(next_track), 1);
+	swap(track, next_track);
+	return 0;
+}
+
+int Tracks::swap_track_down(Track *track)
+{
+	Track *next_track = track->next;
+	if(!next_track) next_track = first;
+
+	change_modules(number_of(track), number_of(next_track), 1);
+	swap(track, next_track);
+	return 0;
+}
+
+
+int Tracks::swap_tracks_up()
+{
+	int result = 0;
+	Track *next = first;
+	while( next ) {
+		Track *track = next;  next = track->next;
+		if( !track->armed ) continue;
+		if( track->previous ) {
+			change_modules(number_of(track->previous), number_of(track), 1);
+			swap(track->previous, track);
+			result = 1;
+		}
+	}
+
+	return result;
+}
+
+int Tracks::swap_tracks_down()
+{
+	int result = 0;
+	Track *prev = last;
+	while( prev ) {
+		Track *track = prev;  prev = track->previous;
+		if( !track->armed ) continue;
+		if( track->next ) {
+			change_modules(number_of(track), number_of(track->next), 1);
+			swap(track, track->next);
+			result = 1;
+		}
+	}
+
+	return result;
+}
+
 void Tracks::paste_audio_transition(PluginServer *server)
 {
 	for(Track *current = first; current; current = NEXT)
diff --git a/cinelerra-5.1/cinelerra/vwindowgui.C b/cinelerra-5.1/cinelerra/vwindowgui.C
index 1217633f..09d3e6f5 100644
--- a/cinelerra-5.1/cinelerra/vwindowgui.C
+++ b/cinelerra-5.1/cinelerra/vwindowgui.C
@@ -129,7 +129,7 @@ void VWindowGUI::draw_wave()
 
 	for( int i=channels; --i>=0; ) delete samples[i];
 	delete render_engine;
-	delete cache;
+	cache->remove_user();
 	delete canvas->refresh_frame;
 	canvas->refresh_frame = vframe;
 	canvas->refresh(1);
@@ -227,6 +227,7 @@ void VWindowGUI::create_objects()
 		mwindow->theme->vtransport_x,
 		mwindow->theme->vtransport_y);
 	transport->create_objects();
+	transport->set_transport(LOOP_MODE);
 
 //printf("VWindowGUI::create_objects 1\n");
 //	add_subwindow(fps_title = new BC_Title(mwindow->theme->vedit_x, y, ""));
diff --git a/cinelerra-5.1/guicast/bctextbox.C b/cinelerra-5.1/guicast/bctextbox.C
index f300e66c..b81da1fb 100644
--- a/cinelerra-5.1/guicast/bctextbox.C
+++ b/cinelerra-5.1/guicast/bctextbox.C
@@ -2377,7 +2377,8 @@ void BC_ScrollTextBox::update_scrollbars()
 		delete yscroll;  yscroll = 0;
 	}
 
-	if( view_rows != text->get_rows() || view_w != text->get_w() ) {
+	if( view_rows != text->get_rows() || view_w != text->get_w() ||
+	    x != text->get_x() || y != text->get_y() ) {
 		text->reposition_window(x, y, view_w, view_rows);
 	}
 	if( need_xscroll && !xscroll ) {
diff --git a/cinelerra-5.1/plugins/theme_blond/data/gang1.png b/cinelerra-5.1/plugins/theme_blond/data/gang1.png
index ac658091..0d9ffe84 100644
Binary files a/cinelerra-5.1/plugins/theme_blond/data/gang1.png and b/cinelerra-5.1/plugins/theme_blond/data/gang1.png differ
diff --git a/cinelerra-5.1/plugins/theme_blond/data/gang2.png b/cinelerra-5.1/plugins/theme_blond/data/gang2.png
index 483afee9..b845849e 100644
Binary files a/cinelerra-5.1/plugins/theme_blond/data/gang2.png and b/cinelerra-5.1/plugins/theme_blond/data/gang2.png differ
diff --git a/cinelerra-5.1/plugins/theme_blond_cv/data/gang1.png b/cinelerra-5.1/plugins/theme_blond_cv/data/gang1.png
index e3bbd85b..3537b41b 100644
Binary files a/cinelerra-5.1/plugins/theme_blond_cv/data/gang1.png and b/cinelerra-5.1/plugins/theme_blond_cv/data/gang1.png differ
diff --git a/cinelerra-5.1/plugins/theme_blond_cv/data/gang2.png b/cinelerra-5.1/plugins/theme_blond_cv/data/gang2.png
index 4d99ae1a..e1f564c5 100644
Binary files a/cinelerra-5.1/plugins/theme_blond_cv/data/gang2.png and b/cinelerra-5.1/plugins/theme_blond_cv/data/gang2.png differ
diff --git a/cinelerra-5.1/plugins/theme_blue/data/gang1.png b/cinelerra-5.1/plugins/theme_blue/data/gang1.png
index ac658091..0d9ffe84 100644
Binary files a/cinelerra-5.1/plugins/theme_blue/data/gang1.png and b/cinelerra-5.1/plugins/theme_blue/data/gang1.png differ
diff --git a/cinelerra-5.1/plugins/theme_blue/data/gang2.png b/cinelerra-5.1/plugins/theme_blue/data/gang2.png
index 483afee9..b845849e 100644
Binary files a/cinelerra-5.1/plugins/theme_blue/data/gang2.png and b/cinelerra-5.1/plugins/theme_blue/data/gang2.png differ
diff --git a/cinelerra-5.1/plugins/theme_blue_dot/data/gang1.png b/cinelerra-5.1/plugins/theme_blue_dot/data/gang1.png
index 8bfbdf44..f95d5635 100644
Binary files a/cinelerra-5.1/plugins/theme_blue_dot/data/gang1.png and b/cinelerra-5.1/plugins/theme_blue_dot/data/gang1.png differ
diff --git a/cinelerra-5.1/plugins/theme_blue_dot/data/gang2.png b/cinelerra-5.1/plugins/theme_blue_dot/data/gang2.png
index a2346a16..2ad644ee 100644
Binary files a/cinelerra-5.1/plugins/theme_blue_dot/data/gang2.png and b/cinelerra-5.1/plugins/theme_blue_dot/data/gang2.png differ
diff --git a/cinelerra-5.1/plugins/theme_bright/data/gang1.png b/cinelerra-5.1/plugins/theme_bright/data/gang1.png
index 70c3bdbb..f5a95e55 100644
Binary files a/cinelerra-5.1/plugins/theme_bright/data/gang1.png and b/cinelerra-5.1/plugins/theme_bright/data/gang1.png differ
diff --git a/cinelerra-5.1/plugins/theme_bright/data/gang2.png b/cinelerra-5.1/plugins/theme_bright/data/gang2.png
index cdcc5c15..4d989dd7 100644
Binary files a/cinelerra-5.1/plugins/theme_bright/data/gang2.png and b/cinelerra-5.1/plugins/theme_bright/data/gang2.png differ
diff --git a/cinelerra-5.1/plugins/theme_cakewalk/data/gang1.png b/cinelerra-5.1/plugins/theme_cakewalk/data/gang1.png
index ac658091..0d9ffe84 100644
Binary files a/cinelerra-5.1/plugins/theme_cakewalk/data/gang1.png and b/cinelerra-5.1/plugins/theme_cakewalk/data/gang1.png differ
diff --git a/cinelerra-5.1/plugins/theme_cakewalk/data/gang2.png b/cinelerra-5.1/plugins/theme_cakewalk/data/gang2.png
index 483afee9..b845849e 100644
Binary files a/cinelerra-5.1/plugins/theme_cakewalk/data/gang2.png and b/cinelerra-5.1/plugins/theme_cakewalk/data/gang2.png differ
diff --git a/cinelerra-5.1/plugins/theme_hulk/data/gang1.png b/cinelerra-5.1/plugins/theme_hulk/data/gang1.png
index a99c6263..0d9ffe84 100644
Binary files a/cinelerra-5.1/plugins/theme_hulk/data/gang1.png and b/cinelerra-5.1/plugins/theme_hulk/data/gang1.png differ
diff --git a/cinelerra-5.1/plugins/theme_hulk/data/gang2.png b/cinelerra-5.1/plugins/theme_hulk/data/gang2.png
index f6738f0c..b845849e 100644
Binary files a/cinelerra-5.1/plugins/theme_hulk/data/gang2.png and b/cinelerra-5.1/plugins/theme_hulk/data/gang2.png differ
diff --git a/cinelerra-5.1/plugins/theme_neophyte/data/gang1.png b/cinelerra-5.1/plugins/theme_neophyte/data/gang1.png
index ac658091..0d9ffe84 100644
Binary files a/cinelerra-5.1/plugins/theme_neophyte/data/gang1.png and b/cinelerra-5.1/plugins/theme_neophyte/data/gang1.png differ
diff --git a/cinelerra-5.1/plugins/theme_neophyte/data/gang2.png b/cinelerra-5.1/plugins/theme_neophyte/data/gang2.png
index 483afee9..b845849e 100644
Binary files a/cinelerra-5.1/plugins/theme_neophyte/data/gang2.png and b/cinelerra-5.1/plugins/theme_neophyte/data/gang2.png differ
diff --git a/cinelerra-5.1/plugins/theme_pinklady/data/gang1.png b/cinelerra-5.1/plugins/theme_pinklady/data/gang1.png
index ac658091..0d9ffe84 100644
Binary files a/cinelerra-5.1/plugins/theme_pinklady/data/gang1.png and b/cinelerra-5.1/plugins/theme_pinklady/data/gang1.png differ
diff --git a/cinelerra-5.1/plugins/theme_pinklady/data/gang2.png b/cinelerra-5.1/plugins/theme_pinklady/data/gang2.png
index 483afee9..b845849e 100644
Binary files a/cinelerra-5.1/plugins/theme_pinklady/data/gang2.png and b/cinelerra-5.1/plugins/theme_pinklady/data/gang2.png differ
diff --git a/cinelerra-5.1/plugins/theme_suv/data/gang1.png b/cinelerra-5.1/plugins/theme_suv/data/gang1.png
index ac658091..0d9ffe84 100644
Binary files a/cinelerra-5.1/plugins/theme_suv/data/gang1.png and b/cinelerra-5.1/plugins/theme_suv/data/gang1.png differ
diff --git a/cinelerra-5.1/plugins/theme_suv/data/gang2.png b/cinelerra-5.1/plugins/theme_suv/data/gang2.png
index 483afee9..b845849e 100644
Binary files a/cinelerra-5.1/plugins/theme_suv/data/gang2.png and b/cinelerra-5.1/plugins/theme_suv/data/gang2.png differ
diff --git a/cinelerra-5.1/plugins/theme_unflat/data/gang1.png b/cinelerra-5.1/plugins/theme_unflat/data/gang1.png
index ac658091..0d9ffe84 100644
Binary files a/cinelerra-5.1/plugins/theme_unflat/data/gang1.png and b/cinelerra-5.1/plugins/theme_unflat/data/gang1.png differ
diff --git a/cinelerra-5.1/plugins/theme_unflat/data/gang2.png b/cinelerra-5.1/plugins/theme_unflat/data/gang2.png
index 483afee9..b845849e 100644
Binary files a/cinelerra-5.1/plugins/theme_unflat/data/gang2.png and b/cinelerra-5.1/plugins/theme_unflat/data/gang2.png differ
diff --git a/cinelerra-5.1/plugins/titler/titler.C b/cinelerra-5.1/plugins/titler/titler.C
index 11e454ec..6722704d 100644
--- a/cinelerra-5.1/plugins/titler/titler.C
+++ b/cinelerra-5.1/plugins/titler/titler.C
@@ -944,7 +944,8 @@ TitleMain::~TitleMain()
 		background = 0;
 	}
 	delete render_engine;
-	delete video_cache;
+	if( video_cache )
+		video_cache->remove_user(); 
 	delete overlay_frame;
 	delete bg_file;
 	delete bg_frame;
@@ -1186,7 +1187,7 @@ int TitleMain::load_font(BC_FontEntry *font)
 Indexable *TitleMain::open_background(const char *filename)
 {
 	delete render_engine;  render_engine = 0;
-	delete video_cache;    video_cache = 0;
+	if( video_cache ) { video_cache->remove_user();  video_cache = 0; }
 	delete bg_file;        bg_file = new File;
 
 	Asset *asset = new Asset(filename);