From: Good Guy <good1.2guy@gmail.com>
Date: Sat, 12 Sep 2020 15:20:26 +0000 (-0600)
Subject: add transition caching with pref, rev read frame caching, cache lock tweaks, fix... 
X-Git-Tag: 2020-09~11
X-Git-Url: https://git.cinelerra-gg.org/git/?p=goodguy%2Fcinelerra.git;a=commitdiff_plain;h=45a8ba3455cf252332c03533a7590df5267ce9aa

add transition caching with pref, rev read frame caching, cache lock tweaks, fix cache aging, push pref changes to render_engine, update ru.po, tweak undo menu text, incr max asset geom
---

diff --git a/cinelerra-5.1/cinelerra/asset.C b/cinelerra-5.1/cinelerra/asset.C
index fab58403..2828fe31 100644
--- a/cinelerra-5.1/cinelerra/asset.C
+++ b/cinelerra-5.1/cinelerra/asset.C
@@ -181,9 +181,9 @@ void Asset::boundaries()
 // sample_rate & frame_rate are user defined
 // 	CLAMP(sample_rate, 1, 1000000);
 // 	CLAMP(frame_rate, 0.001, 1000000);
- 	CLAMP(channels, 0, 16);
- 	CLAMP(width, 0, 10000);
- 	CLAMP(height, 0, 10000);
+ 	CLAMP(channels, 0, MAX_CHANNELS-1);
+ 	CLAMP(width, 0, 32767);
+ 	CLAMP(height, 0, 32767);
 //printf("Asset::boundaries %d %d %f\n", __LINE__, sample_rate, frame_rate);
 }
 
diff --git a/cinelerra-5.1/cinelerra/cache.C b/cinelerra-5.1/cinelerra/cache.C
index 80bf347b..a93f1e1b 100644
--- a/cinelerra-5.1/cinelerra/cache.C
+++ b/cinelerra-5.1/cinelerra/cache.C
@@ -253,36 +253,29 @@ int CICache::get_oldest()
 int CICache::delete_oldest()
 {
 	int result = 0;
-	total_lock->lock("CICache::delete_oldest");
 	CICacheItem *oldest = 0;
-// at least 2
-	if( first != last ) {
-		oldest = first;
-		CICacheItem *current = oldest->next;
-		while( current ) {
+	total_lock->lock("CICache::delete_oldest");
+	if( first != last ) { // at least 2
+		CICacheItem *current = first;
+		for( ; !oldest && current; current=current->next )
+			if( !current->checked_out ) oldest = current;
+		for( ; current; current=current->next ) {
+			if( current->checked_out ) continue;
 			if( current->age < oldest->age )
 				oldest = current;
-			current = current->next;
+		}
+// delete oldest of at least 2 cache files
+		if( oldest ) {
+			remove_pointer(oldest);
+			result = 1;
 		}
 	}
 // settle for just deleting one frame
-	else if( first )
+	else if( first && !first->checked_out )
 		result = first->file->delete_oldest();
-	if( oldest ) {
-// Got the oldest file.  Try requesting cache purge from it.
-		if( oldest->file )
-			oldest->file->purge_cache();
-// Delete the file if cache already empty and not checked out.
-		if( !oldest->checked_out )
-			remove_pointer(oldest);
-		else
-			oldest = 0;
-	}
 	total_lock->unlock();
-	if( oldest ) {
+	if( oldest )
 		oldest->Garbage::remove_user();
-		result = 1;
-	}
 	return result;
 }
 
diff --git a/cinelerra-5.1/cinelerra/editpanel.C b/cinelerra-5.1/cinelerra/editpanel.C
index 1f75414f..bf33acba 100644
--- a/cinelerra-5.1/cinelerra/editpanel.C
+++ b/cinelerra-5.1/cinelerra/editpanel.C
@@ -1127,7 +1127,7 @@ EditUndo::EditUndo(MWindow *mwindow, EditPanel *panel, int x, int y)
 {
 	this->mwindow = mwindow;
 	this->panel = panel;
-	set_tooltip(_("Undo ( z )"));
+	set_tooltip(_("Undo ( z or Ctrl-z)"));
 }
 EditUndo::~EditUndo()
 {
diff --git a/cinelerra-5.1/cinelerra/ffmpeg.C b/cinelerra-5.1/cinelerra/ffmpeg.C
index c08a01db..57232271 100644
--- a/cinelerra-5.1/cinelerra/ffmpeg.C
+++ b/cinelerra-5.1/cinelerra/ffmpeg.C
@@ -270,7 +270,8 @@ FFStream::FFStream(FFMPEG *ffmpeg, AVStream *st, int fidx)
 	frm_count = 0;
 	nudge = AV_NOPTS_VALUE;
 	seek_pos = curr_pos = 0;
-	seeked = 1;  eof = 0;
+	seeking = 0; seeked = 1;
+	eof = 0;
 	reading = writing = 0;
 	hw_pixfmt = AV_PIX_FMT_NONE;
 	hw_device_ctx = 0;
@@ -714,6 +715,7 @@ int FFStream::seek(int64_t no, double rate)
 		}
 	}
 	if( pos == curr_pos ) return 0;
+	seeking = -1;
 	double secs = pos < 0 ? 0. : pos / rate;
 	AVRational time_base = st->time_base;
 	int64_t tstmp = time_base.num > 0 ? secs * time_base.den/time_base.num : 0;
@@ -1222,8 +1224,20 @@ int FFVideoStream::load(VFrame *vframe, int64_t pos)
 	int i = MAX_RETRY + pos - curr_pos;
 	while( ret>=0 && !flushed && curr_pos<=pos && --i>=0 ) {
 		ret = read_frame(frame);
-		if( ret > 0 ) ++curr_pos;
+		if( ret > 0 ) {
+			if( frame->key_frame && seeking < 0 )
+				seeking = 1;
+			if( ffmpeg->file_base->get_use_cache() && seeking > 0 && curr_pos < pos ) {
+				VFrame *cache_frame = ffmpeg->file_base->new_cache_frame(vframe, curr_pos);
+				if( cache_frame ) {
+					ret = convert_cmodel(cache_frame, frame);
+					ffmpeg->file_base->put_cache_frame();
+				}
+			}
+			++curr_pos;
+		}
 	}
+	seeking = 0;
 	if( frame->format == AV_PIX_FMT_NONE || frame->width <= 0 || frame->height <= 0 )
 		ret = -1;
 	if( ret >= 0 ) {
diff --git a/cinelerra-5.1/cinelerra/ffmpeg.h b/cinelerra-5.1/cinelerra/ffmpeg.h
index 1a514e1d..aa01785a 100644
--- a/cinelerra-5.1/cinelerra/ffmpeg.h
+++ b/cinelerra-5.1/cinelerra/ffmpeg.h
@@ -138,7 +138,7 @@ public:
 	int64_t seek_pos, curr_pos;
 	int fidx;
 	int reading, writing;
-	int seeked, eof;
+	int seeking, seeked, eof;
 
 	int hw_pixfmt;
 	AVBufferRef *hw_device_ctx;
diff --git a/cinelerra-5.1/cinelerra/file.C b/cinelerra-5.1/cinelerra/file.C
index f9571c9d..6459ebe8 100644
--- a/cinelerra-5.1/cinelerra/file.C
+++ b/cinelerra-5.1/cinelerra/file.C
@@ -344,6 +344,25 @@ int File::delete_oldest()
 	return frame_cache->delete_oldest();
 }
 
+// create cache frame using input vframe as template
+VFrame *File::new_cache_frame(VFrame *vframe, int64_t position, int first_frame)
+{
+	return frame_cache->new_cache_frame(position,
+		vframe->get_w(), vframe->get_h(), vframe->get_color_model(),
+		current_layer, asset->frame_rate, first_frame);
+}
+
+void File::put_cache_frame()
+{
+	return frame_cache->put_cache_frame();
+}
+
+int File::get_use_cache()
+{
+	return use_cache;
+}
+
+
 // file driver in order of probe precidence
 //  can be reordered in preferences->interface
 const char *File::default_probes[] = { 
diff --git a/cinelerra-5.1/cinelerra/file.h b/cinelerra-5.1/cinelerra/file.h
index 6b660b5e..e0cf4fa3 100644
--- a/cinelerra-5.1/cinelerra/file.h
+++ b/cinelerra-5.1/cinelerra/file.h
@@ -236,6 +236,11 @@ public:
 // Get nearest colormodel that can be decoded without a temporary frame.
 // Used by read_frame.
 	int colormodel_supported(int colormodel);
+// create frame_cache vframe for position, use template vframe
+// clear cache if first frame is a read miss
+	VFrame *new_cache_frame(VFrame *vframe, int64_t position, int first_frame);
+	void put_cache_frame();
+	int get_use_cache();
 
 // stubs for now
 	static const char *compressiontostr(const char *codec) { return codec; }
diff --git a/cinelerra-5.1/cinelerra/filebase.C b/cinelerra-5.1/cinelerra/filebase.C
index 4671fc4a..e2e14891 100644
--- a/cinelerra-5.1/cinelerra/filebase.C
+++ b/cinelerra-5.1/cinelerra/filebase.C
@@ -300,3 +300,16 @@ int64_t FileBase::base_memory_usage()
 }
 
 
+VFrame *FileBase::new_cache_frame(VFrame *vframe, int64_t position)
+{
+	return file->new_cache_frame(vframe, position, 0);
+}
+void FileBase::put_cache_frame()
+{
+	return file->put_cache_frame();
+}
+int FileBase::get_use_cache()
+{
+	return file->get_use_cache();
+}
+
diff --git a/cinelerra-5.1/cinelerra/filebase.h b/cinelerra-5.1/cinelerra/filebase.h
index 3fb8be42..77893f9e 100644
--- a/cinelerra-5.1/cinelerra/filebase.h
+++ b/cinelerra-5.1/cinelerra/filebase.h
@@ -132,6 +132,10 @@ public:
 		int channel,
 		int64_t len);
 	void allocate_history(int len);
+// create cache frames
+	VFrame *new_cache_frame(VFrame *vframe, int64_t position);
+	void put_cache_frame();
+	int get_use_cache();
 
 // For static functions to access it
 	Asset *asset;
diff --git a/cinelerra-5.1/cinelerra/framecache.C b/cinelerra-5.1/cinelerra/framecache.C
index fdf7ef35..be6be51c 100644
--- a/cinelerra-5.1/cinelerra/framecache.C
+++ b/cinelerra-5.1/cinelerra/framecache.C
@@ -204,87 +204,67 @@ void FrameCache::put_frame(VFrame *frame, int64_t position,
 	lock->unlock();
 }
 
-
-
+VFrame *FrameCache::new_cache_frame(int64_t position, int w, int h,
+		int color_model, int layer, double frame_rate, int first_frame)
+{
+	FrameCacheItem *item = 0;
+	lock->lock("FrameCache::put_vframe");
+	if( frame_exists(position, layer, frame_rate, color_model, w, h, &item, -1) ) {
+		lock->unlock();
+		return 0;
+	}
+	if( first_frame ) {
+		while( last ) delete last;
+		total_items = 0;
+		current_item = 0;
+	}
+	item = new FrameCacheItem;
+	item->data = new VFrame(w, h, color_model);
+	item->position = position;
+	item->layer = layer;
+	item->frame_rate = frame_rate;
+	item->source_id = -1;
+	item->age = position < 0 ? INT_MAX : get_age();
+	put_item(item);
+	return item->data;
+}
+void FrameCache::put_cache_frame()
+{
+	lock->unlock();
+}
 
 int FrameCache::frame_exists(VFrame *format, int64_t position,
 	int layer, double frame_rate, FrameCacheItem **item_return, int source_id)
 {
 	FrameCacheItem *item = (FrameCacheItem*)get_item(position);
-// printf("FrameCache::frame_exists %d item=%p item->position=%jd position=%jd\n",
-// __LINE__,
-// item,
-// item ? item->position : 0,
-// position);
-
-	while(item && item->position == position)
-	{
-// printf("FrameCache::frame_exists %d %f,%f %d,%d %d,%d format match=%d item->data=%p\n",
-// __LINE__,
-// item->frame_rate,
-// frame_rate,
-// item->layer,
-// layer,
-// item->source_id,
-// source_id,
-// format->equivalent(item->data, 1),
-// item->data);
-// format->dump_params();
-
-// This originally tested the frame stacks because a change in the
-// interpolate plugin could cause CR2 to interpolate or not interpolate.
-// This was disabled.
-		if(EQUIV(item->frame_rate, frame_rate) &&
-			layer == item->layer &&
-			format->equivalent(item->data, 0) &&
-			(source_id == -1 || item->source_id == -1 || source_id == item->source_id))
-		{
+	for( ; item && item->position == position; item = (FrameCacheItem*)item->next ) {
+		if( !EQUIV(item->frame_rate, frame_rate) ) continue;
+		if( layer != item->layer ) continue;
+		if( !format->equivalent(item->data, 0) ) continue;
+		if( source_id == -1 || item->source_id == -1 ||
+		    source_id == item->source_id ) {
 			*item_return = item;
 			return 1;
 		}
-		else
-			item = (FrameCacheItem*)item->next;
 	}
 	return 0;
 }
 
-int FrameCache::frame_exists(int64_t position,
-	int layer,
-	double frame_rate,
-	int color_model,
-	int w,
-	int h,
-	FrameCacheItem **item_return,
-	int source_id)
+int FrameCache::frame_exists(int64_t position, int layer, double frame_rate,
+		int color_model, int w, int h, FrameCacheItem **item_return, int source_id)
 {
 	FrameCacheItem *item = (FrameCacheItem*)get_item(position);
-	while(item && item->position == position)
-	{
-// printf("FrameCache::frame_exists %d %f,%f %d,%d %d,%d %d,%d\n",
-// __LINE__,
-// item->frame_rate,
-// frame_rate,
-// item->layer,
-// layer,
-// item->data->get_color_model(),
-// color_model,
-// item->data->get_w(),
-// w,
-// item->data->get_h(),
-// h);
-
-		if(EQUIV(item->frame_rate, frame_rate) &&
-			layer == item->layer &&
-			color_model == item->data->get_color_model() &&
-			w == item->data->get_w() &&
-			h == item->data->get_h() &&
-			(source_id == -1 || item->source_id == -1 || source_id == item->source_id))
-		{
+	for( ; item && item->position == position ; item = (FrameCacheItem*)item->next ) {
+		if( !EQUIV(item->frame_rate, frame_rate) ) continue;
+		if( layer != item->layer ) continue;
+		if( color_model != item->data->get_color_model() ) continue;
+		if( w != item->data->get_w() ) continue;
+		if( h != item->data->get_h() ) continue;
+		if( source_id == -1 || item->source_id == -1 ||
+		    source_id == item->source_id ) {
 			*item_return = item;
 			return 1;
 		}
-		else
-			item = (FrameCacheItem*)item->next;
 	}
 	return 0;
 }
diff --git a/cinelerra-5.1/cinelerra/framecache.h b/cinelerra-5.1/cinelerra/framecache.h
index 54222ff7..429c5bba 100644
--- a/cinelerra-5.1/cinelerra/framecache.h
+++ b/cinelerra-5.1/cinelerra/framecache.h
@@ -85,6 +85,13 @@ public:
 		double frame_rate,
 		int use_copy,
 		Indexable *indexable);
+// create new cache vframe at position, return 0 if it already exists
+// if first_frame set, clear cache before new vframe created
+// if new vframe created, leave cache locked for frame load
+	VFrame *new_cache_frame(int64_t position, int w, int h,
+			int color_model, int layer, double frame_rate,
+			int first_frame);
+	void put_cache_frame();
 
 	void dump();
 
diff --git a/cinelerra-5.1/cinelerra/mainmenu.C b/cinelerra-5.1/cinelerra/mainmenu.C
index 42e845c9..3a694f72 100644
--- a/cinelerra-5.1/cinelerra/mainmenu.C
+++ b/cinelerra-5.1/cinelerra/mainmenu.C
@@ -638,7 +638,7 @@ int DumpUndo::handle_event()
 
 // ================================================= edit
 
-Undo::Undo(MWindow *mwindow) : BC_MenuItem(_("Undo"), "z", 'z')
+Undo::Undo(MWindow *mwindow) : BC_MenuItem(_("Undo"), "z or Ctrl-z", 'z')
 {
 	this->mwindow = mwindow;
 }
diff --git a/cinelerra-5.1/cinelerra/mainundo.C b/cinelerra-5.1/cinelerra/mainundo.C
index 9f69f8eb..2e960b3b 100644
--- a/cinelerra-5.1/cinelerra/mainundo.C
+++ b/cinelerra-5.1/cinelerra/mainundo.C
@@ -219,12 +219,11 @@ int MainUndo::undo()
 		}
 	}
 
+	mwindow->reset_caches(1);
 	reset_creators();
-	mwindow->reset_caches();
 	return 0;
 }
 
-
 int MainUndo::redo()
 {
 	mwindow->gui->close_keyvalue_popup();
@@ -247,8 +246,8 @@ int MainUndo::redo()
 				update_caption(current ? current->get_description() : "");
 		}
 	}
+	mwindow->reset_caches(1);
 	reset_creators();
-	mwindow->reset_caches();
 //dump();
 	return 0;
 }
diff --git a/cinelerra-5.1/cinelerra/mwindow.C b/cinelerra-5.1/cinelerra/mwindow.C
index 8319bfbd..bb04335f 100644
--- a/cinelerra-5.1/cinelerra/mwindow.C
+++ b/cinelerra-5.1/cinelerra/mwindow.C
@@ -303,7 +303,7 @@ MWindow::~MWindow()
 	gui->del_keyboard_listener(
 		(int (BC_WindowBase::*)(BC_WindowBase *))
 		&MWindowGUI::keyboard_listener);
-	reset_caches();
+	reset_caches(0);
 #if 0
 // release the hounds
 	if( awindow && awindow->gui ) awindow->gui->close(0);
@@ -4089,18 +4089,18 @@ void MWindow::update_preferences(Preferences *prefs)
 	if( prefs != preferences )
 		preferences->copy_from(prefs);
 	if( cwindow->playback_engine )
-		cwindow->playback_engine->preferences->copy_from(prefs);
+		cwindow->playback_engine->update_preferences(prefs);
 	for(int i = 0; i < vwindows.size(); i++) {
 		VWindow *vwindow = vwindows[i];
 		if( !vwindow->is_running() ) continue;
 		if( vwindow->playback_engine )
-			vwindow->playback_engine->preferences->copy_from(prefs);
+			vwindow->playback_engine->update_preferences(prefs);
 	}
 	for(int i = 0; i < zwindows.size(); i++) {
 		ZWindow *zwindow = zwindows[i];
 		if( !zwindow->is_running() ) continue;
 		if( zwindow->zgui->playback_engine )
-			zwindow->zgui->playback_engine->preferences->copy_from(prefs);
+			zwindow->zgui->playback_engine->update_preferences(prefs);
 	}
 }
 
@@ -4475,9 +4475,8 @@ int MWindow::create_aspect_ratio(float &w, float &h, int width, int height)
 	return 0;
 }
 
-void MWindow::reset_caches()
+void MWindow::reset_caches(int locked)
 {
-	int locked  = gui->get_window_lock();
 	if( locked ) gui->unlock_window();
 	awindow->gui->stop_vicon_drawing(1);
 	if( cwindow->playback_engine )
diff --git a/cinelerra-5.1/cinelerra/mwindow.h b/cinelerra-5.1/cinelerra/mwindow.h
index 2f89d2d9..d7e54b1c 100644
--- a/cinelerra-5.1/cinelerra/mwindow.h
+++ b/cinelerra-5.1/cinelerra/mwindow.h
@@ -565,7 +565,7 @@ public:
 	void remove_indexfile(Indexable *indexable);
 	void rebuild_indices();
 // Asset removal from caches
-	void reset_caches();
+	void reset_caches(int locked);
 	void remove_from_caches(Indexable *idxbl);
 	void remove_assets_from_project(int push_undo, int redraw, int delete_indexes,
 		ArrayList<Indexable*> *drag_assets /* mwindow->session->drag_assets */,
diff --git a/cinelerra-5.1/cinelerra/mwindowedit.C b/cinelerra-5.1/cinelerra/mwindowedit.C
index f75896d7..2bf9a97c 100644
--- a/cinelerra-5.1/cinelerra/mwindowedit.C
+++ b/cinelerra-5.1/cinelerra/mwindowedit.C
@@ -1562,7 +1562,7 @@ int MWindow::paste_edls(ArrayList<EDL*> *new_edls, int load_mode,
 // Delete current project
 	if( load_mode == LOADMODE_REPLACE ||
 	    load_mode == LOADMODE_REPLACE_CONCATENATE ) {
-		reset_caches();
+		reset_caches(1);
 		edl->save_defaults(defaults);
 		hide_plugins();
 		edl->Garbage::remove_user();
diff --git a/cinelerra-5.1/cinelerra/new.C b/cinelerra-5.1/cinelerra/new.C
index f24876bc..a9f4aaf2 100644
--- a/cinelerra-5.1/cinelerra/new.C
+++ b/cinelerra-5.1/cinelerra/new.C
@@ -98,8 +98,8 @@ void New::create_new_edl()
 int New::create_new_project(int load_mode)
 {
 	mwindow->stop_playback(0);
+	mwindow->reset_caches(0);
 	mwindow->gui->lock_window();
-	mwindow->reset_caches();
 
 	memcpy(new_edl->session->achannel_positions,
 		&mwindow->preferences->channel_positions[new_edl->session->audio_channels - 1],
diff --git a/cinelerra-5.1/cinelerra/performanceprefs.C b/cinelerra-5.1/cinelerra/performanceprefs.C
index 12a8fc95..e13cb2f6 100644
--- a/cinelerra-5.1/cinelerra/performanceprefs.C
+++ b/cinelerra-5.1/cinelerra/performanceprefs.C
@@ -63,7 +63,6 @@ void PerformancePrefs::create_objects()
 	char string[BCTEXTLEN];
 	BC_Resources *resources = BC_WindowBase::get_resources();
 	BC_WindowBase *win;
-	int maxw, curw;
 
 	node_list = 0;
 	generate_node_list();
@@ -73,38 +72,31 @@ void PerformancePrefs::create_objects()
 
 	int y0 = y;
 	win = add_subwindow(new BC_Title(x, y + ys5, _("Cache size (MB):"), MEDIUMFONT, resources->text_default));
-	maxw = win->get_w();
-	int x1 = x + xmargin4;
-	win = add_subwindow(new BC_Title(x1, y + ys5, _("Use HW Device:")));
-	x1 += win->get_w() + xs5;
-	PrefsUseHWDev *use_hw_dev = new PrefsUseHWDev(pwindow, this, x1, y);
-	use_hw_dev->create_objects();
-
+	int maxw = win->get_w();
 	int y1 = y += ys30;
-	win = add_subwindow(new BC_Title(x, y + ys5, _("Seconds to preroll renders:")));
-	if((curw = win->get_w()) > maxw)
-		maxw = curw;
-	maxw += x + xs5;
-
-	cache_size = new CICacheSize(maxw, y0, pwindow, this);
+	win = add_subwindow(new BC_Title(x, y1 + ys5, _("Seconds to preroll renders:")));
+	maxw = bmax(win->get_w(), maxw);
+	int x2 = x + maxw + xs5;
+	int y2 = y += ys30;
+	cache_size = new CICacheSize(x2, y0, pwindow, this);
 	cache_size->create_objects();
-
-	add_subwindow(new BC_Title(x, y + ys5, _("Seconds to preroll renders:")));
-	PrefsRenderPreroll *preroll = new PrefsRenderPreroll(pwindow, this, maxw, y1);
+	PrefsRenderPreroll *preroll = new PrefsRenderPreroll(pwindow, this, x2, y1);
 	preroll->create_objects();
+	add_subwindow(new PrefsForceUniprocessor(pwindow, x, y2));
 	y += ys30;
 
-	x1 = x + xmargin4;
-	BC_Title *smp_title = new BC_Title(x1, y + ys5, _("Project SMP cpus:"));
-	add_subwindow(smp_title);
-	x1 += smp_title->get_w() + xs5;
-	PrefsProjectSMP *proj_smp = new PrefsProjectSMP(pwindow, this, x1, y);
+	int x1 = x + xmargin4;
+	add_subwindow(cache_transitions = new CacheTransitions(x1, y0, pwindow, this));
+	win = add_subwindow(new BC_Title(x1, y1, _("Use HW Device:")));
+	maxw = win->get_w();
+	win = add_subwindow(new BC_Title(x1, y2, _("Project SMP cpus:")));
+	maxw = bmax(win->get_w(), maxw);
+	x2 = x1 + maxw + xs5;
+	PrefsUseHWDev *use_hw_dev = new PrefsUseHWDev(pwindow, this, x2, y1);
+	use_hw_dev->create_objects();
+	PrefsProjectSMP *proj_smp = new PrefsProjectSMP(pwindow, this, x2, y2);
 	proj_smp->create_objects();
 
-	PrefsForceUniprocessor *force_1cpu = new PrefsForceUniprocessor(pwindow, x, y);
-	add_subwindow(force_1cpu);
-	y += ys30;
-
 // Background rendering
 	add_subwindow(new BC_Bar(xs5, y, get_w() - xs10));
 	y += ys5;
@@ -322,6 +314,20 @@ int CICacheSize::handle_event()
 	return 0;
 }
 
+CacheTransitions::CacheTransitions(int x, int y,
+	PreferencesWindow *pwindow, PerformancePrefs *subwindow)
+ : BC_CheckBox(x, y, pwindow->thread->preferences->cache_transitions,
+	_("Cache Transitions"))
+{
+	this->pwindow = pwindow;
+}
+
+int CacheTransitions::handle_event()
+{
+	pwindow->thread->preferences->cache_transitions = get_value();
+	return 0;
+}
+
 
 PrefsUseHWDev::PrefsUseHWDev(PreferencesWindow *pwindow,
 		PerformancePrefs *subwindow, int x, int y)
diff --git a/cinelerra-5.1/cinelerra/performanceprefs.h b/cinelerra-5.1/cinelerra/performanceprefs.h
index e9acd3c7..6d15a416 100644
--- a/cinelerra-5.1/cinelerra/performanceprefs.h
+++ b/cinelerra-5.1/cinelerra/performanceprefs.h
@@ -46,6 +46,7 @@ public:
 	int hot_node;
 
 	CICacheSize *cache_size;
+	CacheTransitions *cache_transitions;
 	PerfsUseHWDev *use_hw_dev;
 
 	enum
@@ -338,6 +339,18 @@ public:
 	PreferencesWindow *pwindow;
 };
 
+class CacheTransitions : public BC_CheckBox
+{
+public:
+	CacheTransitions(int x, int y,
+		PreferencesWindow *pwindow,
+		PerformancePrefs *subwindow);
+
+	int handle_event();
+
+	PreferencesWindow *pwindow;
+};
+
 class PrefsUseHWDevItems : public ArrayList<BC_ListBoxItem *>
 {
 public:
diff --git a/cinelerra-5.1/cinelerra/performanceprefs.inc b/cinelerra-5.1/cinelerra/performanceprefs.inc
index f034704c..d69da52a 100644
--- a/cinelerra-5.1/cinelerra/performanceprefs.inc
+++ b/cinelerra-5.1/cinelerra/performanceprefs.inc
@@ -44,6 +44,7 @@ class PrefsRenderFarmSortNodes;
 class PrefsRenderFarmReset;
 class PrefsRenderFarmWatchdog;
 class CICacheSize;
+class CacheTransitions;
 class PerfsUseHWDev;
 
 #endif
diff --git a/cinelerra-5.1/cinelerra/playbackengine.C b/cinelerra-5.1/cinelerra/playbackengine.C
index b15edd62..571afe2a 100644
--- a/cinelerra-5.1/cinelerra/playbackengine.C
+++ b/cinelerra-5.1/cinelerra/playbackengine.C
@@ -466,6 +466,12 @@ int PlaybackEngine::get_direction()
 	return TransportCommand::get_direction(curr_command);
 }
 
+void PlaybackEngine::update_preferences(Preferences *prefs)
+{
+	preferences->copy_from(prefs);
+	create_render_engine();
+}
+
 void PlaybackEngine::send_command(int command, EDL *edl, int wait_tracking, int use_inout)
 {
 //printf("PlaybackEngine::send_command 1 %d\n", command);
diff --git a/cinelerra-5.1/cinelerra/playbackengine.h b/cinelerra-5.1/cinelerra/playbackengine.h
index 65935c2b..9fdb45fb 100644
--- a/cinelerra-5.1/cinelerra/playbackengine.h
+++ b/cinelerra-5.1/cinelerra/playbackengine.h
@@ -86,6 +86,7 @@ public:
 	void stop_playback(int wait);
 	void refresh_frame(int change_type, EDL *edl, int dir=1);
 	int get_direction();
+	void update_preferences(Preferences *prefs);
 
 // Maintain caches through console changes
 	CICache *audio_cache, *video_cache;
diff --git a/cinelerra-5.1/cinelerra/preferences.C b/cinelerra-5.1/cinelerra/preferences.C
index f783fbfc..9800fcee 100644
--- a/cinelerra-5.1/cinelerra/preferences.C
+++ b/cinelerra-5.1/cinelerra/preferences.C
@@ -59,6 +59,7 @@ Preferences::Preferences()
 	if( strlen(index_directory) )
 		fs.complete_path(index_directory);
 	cache_size = 0x10000000;
+	cache_transitions = 1;
 	index_size = 0x400000;
 	index_count = 500;
 	use_thumbnails = 1;
@@ -206,6 +207,7 @@ void Preferences::copy_from(Preferences *that)
 	for( int i=0; i<that->file_probes.size(); ++i )
 		this->file_probes.append(new ProbePref(*that->file_probes[i]));
 	cache_size = that->cache_size;
+	cache_transitions = that->cache_transitions;
 	project_smp = that->project_smp;
 	force_uniprocessor = that->force_uniprocessor;
 	strcpy(lv2_path, that->lv2_path);
@@ -387,6 +389,7 @@ int Preferences::load_defaults(BC_Hash *defaults)
 	use_brender = defaults->get("USE_BRENDER", use_brender);
 	brender_fragment = defaults->get("BRENDER_FRAGMENT", brender_fragment);
 	cache_size = defaults->get("CACHE_SIZE", cache_size);
+	cache_transitions = defaults->get("CACHE_TRANSITIONS", cache_transitions);
 	local_rate = defaults->get("LOCAL_RATE", local_rate);
 	use_renderfarm = defaults->get("USE_RENDERFARM", use_renderfarm);
 	renderfarm_port = defaults->get("RENDERFARM_PORT", renderfarm_port);
@@ -485,6 +488,7 @@ int Preferences::save_defaults(BC_Hash *defaults)
 	defaults->update("ANDROID_PORT", android_port);
 
 	defaults->update("CACHE_SIZE", cache_size);
+	defaults->update("CACHE_TRANSITIONS", cache_transitions);
 	defaults->update("INDEX_DIRECTORY", index_directory);
 	defaults->update("INDEX_SIZE", index_size);
 	defaults->update("INDEX_COUNT", index_count);
diff --git a/cinelerra-5.1/cinelerra/preferences.h b/cinelerra-5.1/cinelerra/preferences.h
index dc658981..4b60577a 100644
--- a/cinelerra-5.1/cinelerra/preferences.h
+++ b/cinelerra-5.1/cinelerra/preferences.h
@@ -156,6 +156,7 @@ public:
 // Several caches of cache_size exist so multiply by 4.
 // rendering, playback, timeline, preview
 	int64_t cache_size;
+	int cache_transitions;
 
 	int use_renderfarm;
 	int renderfarm_port;
diff --git a/cinelerra-5.1/cinelerra/preferencesthread.C b/cinelerra-5.1/cinelerra/preferencesthread.C
index 52de4f55..47f16efd 100644
--- a/cinelerra-5.1/cinelerra/preferencesthread.C
+++ b/cinelerra-5.1/cinelerra/preferencesthread.C
@@ -124,6 +124,7 @@ BC_Window* PreferencesThread::new_gui()
 	redraw_overlays = 0;
 	close_assets = 0;
 	reload_plugins = 0;
+	reset_caches = 0;
 	//int need_new_indexes = 0;
 	rerender = 0;
 
@@ -251,6 +252,9 @@ int PreferencesThread::apply_settings()
 		File::setenv_path("LV2_PATH", preferences->lv2_path, 1);
 		mwindow->restart_status = -1;
 	}
+	if( preferences->cache_size != mwindow->preferences->cache_size ||
+	    preferences->cache_transitions != mwindow->preferences->cache_transitions )
+		reset_caches = 1;
 
 	if( mwindow->preferences->perpetual_session && !preferences->perpetual_session )
 		mwindow->remove_undo_data();
@@ -269,6 +273,8 @@ int PreferencesThread::apply_settings()
 	else {
 		BC_Trace::disable_locks();
 	}
+	if( reset_caches )
+		mwindow->reset_caches(0);
 
 	mwindow->reset_android_remote();
 	int ffmpeg_early_probe = mwindow->preferences->get_file_probe_armed("FFMPEG_Early");
diff --git a/cinelerra-5.1/cinelerra/preferencesthread.h b/cinelerra-5.1/cinelerra/preferencesthread.h
index 5309b22a..653199b6 100644
--- a/cinelerra-5.1/cinelerra/preferencesthread.h
+++ b/cinelerra-5.1/cinelerra/preferencesthread.h
@@ -71,6 +71,7 @@ public:
 	int rerender;
 	int close_assets;
 	int reload_plugins;
+	int reset_caches;
 	PreferencesWindow *window;
 	MWindow *mwindow;
 // Copy of mwindow preferences
diff --git a/cinelerra-5.1/cinelerra/vmodule.C b/cinelerra-5.1/cinelerra/vmodule.C
index 89d00f59..56444190 100644
--- a/cinelerra-5.1/cinelerra/vmodule.C
+++ b/cinelerra-5.1/cinelerra/vmodule.C
@@ -218,73 +218,50 @@ int VModule::import_frame(VFrame *output, VEdit *current_edit,
 //printf("VModule::import_frame %d cache=%p\n", __LINE__, get_cache());
 		if( current_edit->asset ) {
 			get_cache()->age();
-			file = get_cache()->check_out(current_edit->asset,
-				get_edl());
+			file = get_cache()->check_out(current_edit->asset, get_edl());
 //			get_cache()->dump();
 		}
 
 // File found
 		if( file || nested_edl ) {
-// Make all positions based on requested frame rate.
-			int64_t edit_startproject = Units::to_int64(current_edit->startproject *
-				frame_rate /
-				edl_rate);
-			int64_t edit_startsource = Units::to_int64(current_edit->startsource *
-				frame_rate /
-				edl_rate);
-// Source position going forward
-			uint64_t position = direction_position -
-				edit_startproject +
-				edit_startsource;
 			int64_t nested_position = 0;
-
-
-
-
-
-// apply speed curve to source position so the timeline agrees with the playback
-			if( track->has_speed() ) {
-// integrate position from start of edit.
-				double speed_position = edit_startsource;
-				FloatAutos *speed_autos = (FloatAutos*)track->automation->autos[AUTOMATION_SPEED];
-				speed_position += speed_autos->automation_integral(edit_startproject,
-						direction_position-edit_startproject, PLAY_FORWARD);
-//printf("VModule::import_frame %d %jd %jd\n", __LINE__, position, (int64_t)speed_position);
-				position = (int64_t)speed_position;
-			}
-
-
-
-
-
-			int asset_w;
-			int asset_h;
-			if( debug ) printf("VModule::import_frame %d\n", __LINE__);
-
-
-// maybe apply speed curve here, so timeline reflects actual playback
-
-
-
-// if we hit the end of stream, freeze at last frame
-			uint64_t max_position = 0;
+// Source position going forward, in edl framerate
+			int64_t pos = Units::to_int64((double)direction_position / frame_rate * edl_rate);
+			int64_t len = pos - current_edit->startproject;
+			FloatAutos *speed_autos = !track->has_speed() ? 0 :
+				(FloatAutos*)track->automation->autos[AUTOMATION_SPEED];
+			if( speed_autos && len > 0 )
+				len = speed_autos->automation_integral(current_edit->startproject, len, PLAY_FORWARD);
+			pos = current_edit->startsource + len;
+// Make positions based on requested frame rate.
+			int64_t position = Units::to_int64((double)pos * frame_rate / edl_rate);
+
+			int64_t max_position;
+			int asset_w, asset_h;
 			if( file ) {
+				asset_w = current_edit->asset->width;
+				asset_h = current_edit->asset->height;
 				max_position = Units::to_int64((double)file->get_video_length() *
-					frame_rate /
-					current_edit->asset->frame_rate - 1);
+					frame_rate / current_edit->asset->frame_rate - 1);
 			}
 			else {
+				asset_w = nested_edl->session->output_w;
+				asset_h = nested_edl->session->output_h;
 				max_position = Units::to_int64(nested_edl->tracks->total_length() *
 					frame_rate - 1);
 			}
+// if we hit the end of stream, freeze at last frame
+			CLAMP(position, 0, max_position);
 
-
-			if( position > max_position ) position = max_position;
-			else
-			if( position < 0 ) position = 0;
+			VFrame *&input = commonrender ?
+				((VRender*)commonrender)->input_temp : // Realtime playback
+				input_temp ; // Menu effect
+			VFrame::get_temp(input, asset_w, asset_h, get_edl()->session->color_model);
 
 			int use_cache = renderengine &&
-				renderengine->command->single_frame();
+				( renderengine->command->single_frame() ||
+				  renderengine->command->get_direction() == PLAY_REVERSE );
+
 //			int use_asynchronous = !use_cache &&
 //				renderengine &&
 // Try to make rendering go faster.
@@ -299,24 +276,54 @@ int VModule::import_frame(VFrame *output, VEdit *current_edit,
 //				else
 					file->stop_video_thread();
 
-				int64_t normalized_position = Units::to_int64(position *
-					current_edit->asset->frame_rate /
-					frame_rate);
-// printf("VModule::import_frame %d %lld %lld\n",
-// __LINE__,
-// position,
-// normalized_position);
+// cache transitions
+				VEdit *vnext = (VEdit *)current_edit->next;
+				pos = Units::to_int64((double)input_position / frame_rate * edl_rate);
+				if( renderengine && renderengine->preferences->cache_transitions &&
+				    renderengine->command->get_direction() == PLAY_FORWARD &&
+				    current_edit->next && current_edit->next->transition &&
+				    file->get_video_length() >= 0 && pos >= vnext->startproject &&
+				    pos < vnext->startproject + vnext->transition->length ) {
+					file->set_cache_frames(0);
+					file->set_layer(current_edit->channel);
+					VEdit *vnext = (VEdit *)current_edit->next;
+					Track *track = current_edit->track;
+					FloatAutos *speed_autos = (FloatAutos*)(track->has_speed() ?
+						track->automation->autos[AUTOMATION_SPEED] : 0);
+					int64_t end = vnext->startproject + vnext->transition->length;
+					int first_frame = 1;
+					int count = renderengine->preferences->cache_size /
+						input->get_data_size() / 2;  // try to burn only 1/2 of cache
+					while( !result && pos < end && count > 0 ) {
+						int64_t curr_pos = pos - current_edit->startproject;
+						if( curr_pos > 0 && speed_autos )
+							curr_pos = speed_autos->automation_integral(
+								current_edit->startproject, curr_pos, PLAY_FORWARD);
+						curr_pos += current_edit->startsource;
+						int64_t norm_pos = Units::to_int64((double)curr_pos *
+							current_edit->asset->frame_rate / edl_rate);
+						VFrame *cache_frame = file->new_cache_frame(input, norm_pos, first_frame);
+						if( cache_frame ) {
+							file->set_video_position(norm_pos, 0);
+							result = file->read_frame(cache_frame);
+							file->put_cache_frame();
+						}
+						else if( first_frame ) // already loaded
+							break;
+						first_frame = 0;
+						++pos;  --count;
+					}
+					use_cache = 1;
+				}
+
+				int64_t normalized_position = Units::to_int64((double)position *
+					current_edit->asset->frame_rate / frame_rate);
+//printf("VModule::import_frame %d %lld %lld\n", __LINE__, position, normalized_position);
 				file->set_layer(current_edit->channel);
-				file->set_video_position(normalized_position,
-					0);
-				asset_w = current_edit->asset->width;
-				asset_h = current_edit->asset->height;
-//printf("VModule::import_frame %d normalized_position=%lld\n", __LINE__, normalized_position);
+				file->set_video_position(normalized_position, 0);
 			}
 			else {
 				if( debug ) printf("VModule::import_frame %d\n", __LINE__);
-				asset_w = nested_edl->session->output_w;
-				asset_h = nested_edl->session->output_h;
 // Get source position in nested frame rate in direction of playback.
 				nested_position = Units::to_int64(position *
 					nested_edl->session->frame_rate /
@@ -375,35 +382,14 @@ int VModule::import_frame(VFrame *output, VEdit *current_edit,
 				!EQUIV(in_h, asset_h)) {
 //printf("VModule::import_frame %d file -> temp -> output\n", __LINE__);
 // Get temporary input buffer
-				VFrame **input = 0;
-// Realtime playback
-				if( commonrender ) {
-					VRender *vrender = (VRender*)commonrender;
-//printf("VModule::import_frame %d vrender->input_temp=%p\n", __LINE__, vrender->input_temp);
-					input = &vrender->input_temp;
-				}
-				else {
-// Menu effect
-					input = &input_temp;
-				}
-
-
-				if( (*input) &&
-				   ((*input)->get_w() != asset_w ||
-				   (*input)->get_h() != asset_h) ) {
-					delete (*input);
-					(*input) = 0;
-				}
-
-				if( !(*input) ) {
-					(*input) =
-						new VFrame(asset_w, asset_h,
-							get_edl()->session->color_model);
-				}
+				VFrame **input = commonrender ?  // Realtime playback
+					&((VRender*)commonrender)->input_temp :
+					&input_temp ; // Menu effect
+				VFrame::get_temp(*input, asset_w, asset_h,
+						get_edl()->session->color_model);
 				(*input)->copy_stacks(output);
-
 // file -> temp
-// Cache for single frame only
+// Cache for single frame, reverse playback
 				if( file ) {
 					if( debug ) printf("VModule::import_frame %d this=%p file=%s\n",
 						__LINE__,
diff --git a/cinelerra-5.1/cinelerra/vrender.C b/cinelerra-5.1/cinelerra/vrender.C
index 64384430..bcb87a4e 100644
--- a/cinelerra-5.1/cinelerra/vrender.C
+++ b/cinelerra-5.1/cinelerra/vrender.C
@@ -133,7 +133,8 @@ int VRender::process_buffer(int64_t input_position,
 	int use_vconsole = 1;
 	int use_brender = 0;
 	int result = 0;
-	int use_cache = renderengine->command->single_frame();
+	int use_cache = renderengine->command->single_frame() ||
+		renderengine->command->get_direction() == PLAY_REVERSE;
 // 	int use_asynchronous = 
 // 		renderengine->command->realtime && 
 // 		renderengine->get_edl()->session->video_every_frame &&
diff --git a/cinelerra-5.1/po/ru.po b/cinelerra-5.1/po/ru.po
index ccd575c7..93b35adc 100644
--- a/cinelerra-5.1/po/ru.po
+++ b/cinelerra-5.1/po/ru.po
@@ -1,20 +1,18 @@
-# translation of cin.po to russian
-# translation of ru-4.po to
-# translation of ru-3.po to
-# translation of ru-2.po to
-# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# Translation of Cinelerra-GG Infinity to Russian
+# Copyright (C) 2006-2019 Heroine Virtual Ltd. by Adam Williams
+# Copyright (C) 2007-2020 mods for Cinelerra-GG by W.P.Morrow aka goodguy
 # This file is distributed under the same license as the PACKAGE package.
 #
-# Andrew Randrianasulu <randrianasulu@gmail.com>, 2019, 2020.
 # Igor Vladimirsky aka igor_ubuntu <sitelve@gmail.com> 2016-2018
+# Andrew Randrianasulu randrianasulu@gmail.com> 2019-2020
 msgid ""
 msgstr ""
-"Project-Id-Version: CinelerraGG\n"
-"Report-Msgid-Bugs-To: \n"
+"Project-Id-Version: Cinelerra-GG Infinity\n"
+"Report-Msgid-Bugs-To: <cin@lists.cinelerra-gg.org>\n"
 "POT-Creation-Date: 2020-09-01 04:28+0300\n"
 "PO-Revision-Date: 2020-09-06 15:06+0300\n"
 "Last-Translator: Andrew Randrianasulu <randrianasulu@gmail.com>\n"
-"Language-Team: русский <Igor Vladimirsky aka igor_ubuntu <sitelve@gmail.com>>\n"
+"Language-Team: <randrianasulu@gmail.com>\n"
 "Language: ru_RU\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"