From: Good Guy <good1.2guy@gmail.com>
Date: Thu, 28 Nov 2019 20:19:55 +0000 (-0700)
Subject: rework audio import_samples + resample + playback speed sampling, fix clear_boarder... 
X-Git-Tag: 2019-11~2
X-Git-Url: https://cinelerra-gg.org/git/?a=commitdiff_plain;h=83c58d6d78f6bf0d1d1fd4cfba8654906fe6ec29;p=goodguy%2Fcinelerra.git

rework audio import_samples + resample + playback speed sampling, fix clear_boarder segv, index rebuild fixes, fix libzmpeg3 large audio buffer segv
---

diff --git a/cinelerra-5.1/cinelerra/amodule.C b/cinelerra-5.1/cinelerra/amodule.C
index 50b58884..9e2c59b6 100644
--- a/cinelerra-5.1/cinelerra/amodule.C
+++ b/cinelerra-5.1/cinelerra/amodule.C
@@ -72,75 +72,12 @@ AModuleResample::~AModuleResample()
 		delete nested_output[i];
 }
 
-int AModuleResample::read_samples(Samples *buffer, int64_t start, int64_t len)
+int AModuleResample::read_samples(Samples *buffer,
+		int64_t start, int64_t len, int direction)
 {
-	int result = 0;
-
-
-	if(module->asset)
-	{
-// Files only read going forward.
-		if(get_direction() == PLAY_REVERSE)
-		{
-			start -= len;
-		}
-
-//printf("AModuleResample::read_samples start=%jd len=%jd\n", start, len);
-		module->file->set_audio_position(start);
-		module->file->set_channel(module->channel);
-		result = module->file->read_samples(buffer, len);
-
-// Reverse buffer so resampling filter renders forward.
-		if(get_direction() == PLAY_REVERSE)
-			Resample::reverse_buffer(buffer->get_data(), len);
-	}
-	else
-	if(module->nested_edl)
-	{
-
-
-// Nested EDL generates reversed buffer.
-		for(int i = 0; i < module->nested_edl->session->audio_channels; i++)
-		{
-			if(nested_allocation < len)
-			{
-				delete nested_output[i];
-				nested_output[i] = 0;
-			}
-
-			if(!nested_output[i])
-			{
-				nested_output[i] = new Samples(len);
-			}
-		}
-
-
-		result = module->nested_renderengine->arender->process_buffer(
-			nested_output,
-			len,
-			start);
-// printf("AModuleResample::read_samples buffer=%p module=%p len=%d\n",
-// buffer,
-// module,
-// len);
-		memcpy(buffer->get_data(),
-			nested_output[module->channel]->get_data(),
-			len * sizeof(double));
-
-	}
-	return result;
+	return module->read_samples(buffer, start, len, direction);
 }
 
-
-
-
-
-
-
-
-
-
-
 AModule::AModule(RenderEngine *renderengine,
 	CommonRender *commonrender,
 	PluginArray *plugin_array,
@@ -148,6 +85,7 @@ AModule::AModule(RenderEngine *renderengine,
  : Module(renderengine, commonrender, plugin_array, track)
 {
 	data_type = TRACK_AUDIO;
+	channel = 0;
 	transition_temp = 0;
 	speed_temp = 0;
 	bzero(nested_output, sizeof(Samples*) * MAX_CHANNELS);
@@ -171,6 +109,52 @@ AModule::~AModule()
 	delete resample;
 }
 
+int AModule::read_samples(Samples *buffer, int64_t start, int64_t len, int direction)
+{
+	if( len < 0 ) return 1;
+	double *buffer_data = buffer->get_data();
+// if start < 0, zero fill prefix.  if error, zero fill buffer
+	int64_t zeros = len;
+	int result = 0;
+	if( asset ) {
+// Files only read going forward.
+		if( direction == PLAY_REVERSE ) start -= len;
+		int64_t sz = start >= 0 ? len : len + start;
+		if( start < 0 ) start = 0;
+		if( sz > 0 ) {
+			file->set_audio_position(start);
+			file->set_channel(channel);
+			result = file->read_samples(buffer, sz);
+			if( !result && (zeros-=sz) > 0 ) {
+				double *top_data = buffer_data + zeros;
+				memmove(top_data, buffer_data, sz*sizeof(*buffer_data));
+			}
+		}
+		if( !result && direction == PLAY_REVERSE )
+			Resample::reverse_buffer(buffer_data, len);
+	}
+	else if( nested_edl ) {
+		if( nested_allocation < len ) {
+			nested_allocation = len;
+			for( int i=0; i<nested_edl->session->audio_channels; ++i ) {
+				delete nested_output[i];
+				nested_output[i] = new Samples(nested_allocation);
+			}
+		}
+		result = nested_renderengine->arender->
+			process_buffer(nested_output, len, start);
+		if( !result ) {
+			double *sample_data = nested_output[channel]->get_data();
+			int buffer_size = len * sizeof(*buffer_data);
+			memcpy(buffer_data, sample_data, buffer_size);
+			zeros = 0;
+		}
+	}
+	if( zeros > 0 )
+		memset(buffer_data, 0, zeros*sizeof(*buffer_data));
+	return result;
+}
+
 AttachmentPoint* AModule::new_attachment(Plugin *plugin)
 {
 	return new AAttachmentPoint(renderengine, plugin);
@@ -206,258 +190,179 @@ CICache* AModule::get_cache()
 
 
 int AModule::import_samples(AEdit *edit,
-	int64_t start_project,
-	int64_t edit_startproject,
-	int64_t edit_startsource,
-	int direction,
-	int sample_rate,
-	Samples *buffer,
-	int64_t fragment_len)
+	int64_t start_project, int64_t edit_startproject, int64_t edit_startsource,
+	int direction, int sample_rate, Samples *buffer, int64_t fragment_len)
 {
-	const int debug = 0;
 	int result = 0;
-// start in EDL samplerate
-	int64_t start_source = start_project - edit_startproject + edit_startsource;
-// fragment size adjusted for speed curve
-	int64_t speed_fragment_len = fragment_len;
-// boundaries of input fragment required for speed curve
-	double max_position = 0;
-	double min_position = 0;
-
-	double speed_position = edit_startsource;
-// position in source where speed curve starts reading
-	double speed_position1 = speed_position;
-// position in source where speed curve finishes
-	double speed_position2 = speed_position;
-// Need speed curve processing
-	int have_speed = 0;
-// Temporary buffer for rendering speed curve
+	if( fragment_len <= 0 )
+		result = 1;
+	if( nested_edl && edit->channel >= nested_edl->session->audio_channels )
+		result = 1;
+	double *buffer_data = buffer->get_data();
+// buffer fragment adjusted for speed curve
 	Samples *speed_buffer = buffer;
+	double *speed_data = speed_buffer->get_data();
+	int64_t speed_fragment_len = fragment_len;
+	int dir = direction == PLAY_FORWARD ? 1 : -1;
+// normal speed source boundaries in EDL samplerate
+	int64_t start_source = start_project - edit_startproject + edit_startsource;
+	double end_source = start_source + dir*speed_fragment_len;
+	double start_position = start_source;
+//	double end_position = end_source;
+// normal speed playback boundaries
+	double min_source = bmin(start_source, end_source);
+	double max_source = bmax(start_source, end_source);
 
-	if( nested_edl && edit->channel >= nested_edl->session->audio_channels )
-		return 1;
 	this->channel = edit->channel;
-	int dir = direction == PLAY_FORWARD ? 1 : -1;
+	int have_speed = track->has_speed();
 
 // apply speed curve to source position so the timeline agrees with the playback
-	if( track->has_speed() ) {
-// get speed adjusted position from start of edit.
+	if( !result && have_speed ) {
+// get speed adjusted start position from start of edit.
 		FloatAuto *previous = 0, *next = 0;
 		FloatAutos *speed_autos = (FloatAutos*)track->automation->autos[AUTOMATION_SPEED];
-		speed_position += speed_autos->automation_integral(edit_startproject,
+		double source_position = edit_startsource +
+			speed_autos->automation_integral(edit_startproject,
 				start_project-edit_startproject, PLAY_FORWARD);
-		speed_position1 = speed_position;
-
+		min_source = source_position;
+		max_source = source_position;
 // calculate boundaries of input fragment required for speed curve
-		max_position = speed_position;
-		min_position = speed_position;
 		int64_t pos = start_project;
-		for( int64_t i=0; i<fragment_len; ++i,pos+=dir ) {
+		start_position = source_position;
+		for( int64_t i=fragment_len; --i>=0; pos+=dir ) {
 			double speed = speed_autos->get_value(pos, direction, previous, next);
-			speed_position += dir*speed;
-			if(speed_position > max_position) max_position = speed_position;
-			if(speed_position < min_position) min_position = speed_position;
-		}
-
-		speed_position2 = speed_position;
-		if(speed_position2 < speed_position1)
-		{
-			max_position += 1.0;
-//			min_position -= 1.0;
-			speed_fragment_len = (int64_t)(max_position - min_position);
-		}
-		else
-		{
-			max_position += 1.0;
-			speed_fragment_len = (int64_t)(max_position - min_position);
+			source_position += dir*speed;
+			if( source_position > max_source ) max_source = source_position;
+			if( source_position < min_source ) min_source = source_position;
 		}
-
-//printf("AModule::import_samples %d %f %f %f %f\n",
-// __LINE__, min_position, max_position, speed_position1, speed_position2);
-
-// new start of source to read from file
-		start_source = (int64_t)min_position;
-		have_speed = 1;
-
+//		end_position = source_position;
+		speed_fragment_len = (int64_t)(max_source - min_source);
+		start_source = direction == PLAY_FORWARD ? min_source : max_source;
+		if( speed_fragment_len > 0 ) {
 // swap in the temp buffer
-		if(speed_temp && speed_temp->get_allocated() < speed_fragment_len) {
-			delete speed_temp;  speed_temp = 0;
+			if( speed_temp && speed_temp->get_allocated() < speed_fragment_len ) {
+				delete speed_temp;  speed_temp = 0;
+			}
+			if( !speed_temp )
+				speed_temp = new Samples(speed_fragment_len);
+			speed_buffer = speed_temp;
+			speed_data = speed_buffer->get_data();
 		}
-		if(!speed_temp)
-			speed_temp = new Samples(speed_fragment_len);
-		speed_buffer = speed_temp;
 	}
 
-	if( speed_fragment_len == 0 )
-		return 1;
+	int edit_sample_rate = 0;
+	if( speed_fragment_len <= 0 )
+		result = 1;
 
-// Source is a nested EDL
-	if( edit->nested_edl ) {
-		int command = direction == PLAY_REVERSE ?
-			NORMAL_REWIND : NORMAL_FWD;
+	if( !result && edit->asset ) {
+		nested_edl = 0;
+		if( nested_renderengine ) {
+			delete nested_renderengine;  nested_renderengine = 0;
+		}
+// Source is an asset
+		asset = edit->asset;
+		edit_sample_rate = asset->sample_rate;
+		get_cache()->age();
+		file = get_cache()->check_out(asset, get_edl());
+		if( !file ) {
+			printf(_("AModule::import_samples Couldn't open %s.\n"), asset->path);
+			result = 1;
+		}
+	}
+	else if( !result && edit->nested_edl ) {
 		asset = 0;
-
+// Source is a nested EDL
 		if( !nested_edl || nested_edl->id != edit->nested_edl->id ) {
 			nested_edl = edit->nested_edl;
-			if( nested_renderengine ) {
-				delete nested_renderengine;  nested_renderengine = 0;
-			}
-			if( !nested_command )
-				nested_command = new TransportCommand;
-			if( !nested_renderengine ) {
-				nested_command->command = command;
-				nested_command->get_edl()->copy_all(nested_edl);
-				nested_command->change_type = CHANGE_ALL;
-				nested_command->realtime = renderengine->command->realtime;
-				nested_renderengine = new RenderEngine(0, get_preferences(), 0, 1);
-				nested_renderengine->set_acache(get_cache());
-// Must use a private cache for the audio
-// 				if(!cache)
-// 				{
-// 					cache = new CICache(get_preferences());
-// 					private_cache = 1;
-// 				}
-// 				nested_renderengine->set_acache(cache);
-				nested_renderengine->arm_command(nested_command);
-			}
+			delete nested_renderengine;
+			nested_renderengine = 0;
 		}
-if(debug) printf("AModule::import_samples %d speed_fragment_len=%d\n", __LINE__, (int)speed_fragment_len);
-
-// Allocate output buffers for all channels
-		for( int i=0; i<nested_edl->session->audio_channels; ++i ) {
-			if( nested_allocation < speed_fragment_len ) {
-				delete nested_output[i];  nested_output[i] = 0;
-			}
-			if(!nested_output[i])
-				nested_output[i] = new Samples(speed_fragment_len);
+		edit_sample_rate = nested_edl->session->sample_rate;
+		int command = direction == PLAY_REVERSE ?
+			NORMAL_REWIND : NORMAL_FWD;
+		if( !nested_command ) {
+			nested_command = new TransportCommand;
+			nested_command->command = command;
+			nested_command->get_edl()->copy_all(nested_edl);
+			nested_command->change_type = CHANGE_ALL;
+			nested_command->realtime = renderengine->command->realtime;
+		}
+		if( !nested_renderengine ) {
+			nested_renderengine = new RenderEngine(0, get_preferences(), 0, 1);
+			nested_renderengine->set_acache(get_cache());
+			nested_renderengine->arm_command(nested_command);
 		}
-
-		if( nested_allocation < speed_fragment_len )
-			nested_allocation = speed_fragment_len;
-
-// Update direction command
 		nested_renderengine->command->command = command;
+		result = 0;
+	}
 
-// Render the segment
-		if( !nested_renderengine->arender )
-			bzero(speed_buffer->get_data(), speed_fragment_len * sizeof(double));
-		else if(sample_rate != nested_edl->session->sample_rate) {
+	if( !result ) {
+// speed_buffer is (have_speed ? speed_temp : buffer)
+		if( sample_rate != edit_sample_rate ) {
 			if( !resample )
 				resample = new AModuleResample(this);
 			result = resample->resample(speed_buffer,
-				speed_fragment_len, nested_edl->session->sample_rate,
+				speed_fragment_len, edit_sample_rate,
 				sample_rate, start_source, direction);
-// Resample reverses to keep it running forward.
 		}
 		else {
-// Render without resampling
-			result = nested_renderengine->arender->process_buffer(
-				nested_output, speed_fragment_len, start_source);
-			memcpy(speed_buffer->get_data(),
-				nested_output[edit->channel]->get_data(),
-				speed_fragment_len * sizeof(double));
-
-// Reverse fragment so ::render can apply transitions going forward.
-			if( direction == PLAY_REVERSE ) {
-				Resample::reverse_buffer(speed_buffer->get_data(), speed_fragment_len);
-			}
+			result = read_samples(speed_buffer,
+				start_source, speed_fragment_len, direction);
 		}
 	}
-	else if( edit->asset ) {
-// Source is an asset
-		nested_edl = 0;
-		asset = edit->asset;
-		get_cache()->age();
-
-		if( nested_renderengine ) {
-			delete nested_renderengine;  nested_renderengine = 0;
-		}
-
-		if( !(file = get_cache()->check_out( asset, get_edl())) ) {
-// couldn't open source file / skip the edit
-			printf(_("AModule::import_samples Couldn't open %s.\n"), asset->path);
-			result = 1;
-		}
-		else {
-			result = 0;
-
-			if( sample_rate != asset->sample_rate ) {
-// Read through sample rate converter.
-				if( !resample )
-					resample = new AModuleResample(this);
-				result = resample->resample(speed_buffer,
-					speed_fragment_len, asset->sample_rate,
-					sample_rate, start_source, direction);
-// Resample reverses to keep it running forward.
-			}
-			else {
-				file->set_audio_position(start_source);
-				file->set_channel(edit->channel);
-				result = file->read_samples(speed_buffer, speed_fragment_len);
-// Reverse fragment so ::render can apply transitions going forward.
-				if(direction == PLAY_REVERSE)
-					Resample::reverse_buffer(speed_buffer->get_data(), speed_fragment_len);
-			}
-
-			get_cache()->check_in(asset);
-			file = 0;
-		}
-	}
-	else {
-		nested_edl = 0;
-		asset = 0;
-		if( speed_fragment_len > 0 )
-			bzero(speed_buffer->get_data(), speed_fragment_len * sizeof(double));
+	if( asset && file ) {
+		file = 0;
+		get_cache()->check_in(asset);
 	}
-
 // Stretch it to fit the speed curve
 // Need overlapping buffers to get the interpolation to work, but this
 // screws up sequential effects.
-	if( have_speed ) {
-		double *buffer_samples = buffer->get_data();
-		if( speed_fragment_len > 0 ) {
-			FloatAuto *previous = 0;
-			FloatAuto *next = 0;
-			FloatAutos *speed_autos = (FloatAutos*)track->automation->autos[AUTOMATION_SPEED];
-			double *speed_samples = speed_buffer->get_data();
-			int len1 = speed_fragment_len-1;
-			int out_offset = dir>0 ? 0 : fragment_len-1;
-			speed_position = speed_position1;
+	if( !result && have_speed ) {
+		FloatAuto *previous = 0, *next = 0;
+		FloatAutos *speed_autos = (FloatAutos*)track->automation->autos[AUTOMATION_SPEED];
+		int len1 = speed_fragment_len-1;
+		double speed_position = start_position;
+		double pos = start_project;
+// speed		gnuplot> plot "/tmp/x.dat" using($1) with lines
+// speed_position	gnuplot> plot "/tmp/x.dat" using($2) with lines
+//FILE *fp = 0;
+//if( !channel ) { fp = fopen("/tmp/x.dat", "a"); fprintf(fp," %f %f\n",0.,0.); }
+		for( int64_t i=0; i<fragment_len; ++i,pos+=dir ) {
 			int64_t speed_pos = speed_position;
-
-			int64_t pos = start_project;
-			for( int64_t i=0; i<fragment_len; ++i,pos+=dir ) {
-				double speed = speed_autos->get_value(pos,
-					direction, previous, next);
-				double next_position = speed_position + dir*speed;
-				int64_t next_pos = next_position;
+			double speed = speed_autos->get_value(pos,
+				direction, previous, next);
+//if(fp) fprintf(fp," %f %f\n", speed, speed_position);
+			double next_position = speed_position + dir*speed;
+			int64_t next_pos = next_position;
+			int total = abs(next_pos - speed_pos);
+			int k = speed_pos - min_source;
+			if( dir < 0 ) k = len1 - k; // if buffer reversed
+			double sample = speed_data[bclip(k, 0,len1)];
+			if( total > 1 ) {
 				int d = next_pos >= speed_pos ? 1 : -1;
-				int k = speed_pos - start_source;
-				double sample = speed_samples[bclip(k, 0,len1)];
-				int total = abs(next_pos - speed_pos);
-				if( total > 1 ) {
-					for( int j=total; --j>0; ) {
-						k += d;
-						sample += speed_samples[bclip(k, 0,len1)];
-					}
-					sample /= total;
-				}
-#if 0
-				else if( total < 1 ) {
+				for( int j=total; --j>0; ) {
 					k += d;
-					double next_sample = speed_samples[bclip(k, 0,len1)];
-					double v = speed_position - speed_pos;
-					sample = (1.-v) * sample + v * next_sample;
+					sample += speed_data[bclip(k, 0,len1)];
 				}
-#endif
-				buffer_samples[out_offset] = sample;
-				out_offset += dir;
-				speed_position = next_position;
-				speed_pos = next_pos;
+				sample /= total;
+			}
+#if 0
+			else if( total < 1 ) {
+				int d = next_pos >= speed_pos ? 1 : -1;
+				k += d;
+				double next_sample = speed_data[bclip(k, 0,len1)];
+				double v = speed_position - speed_pos;
+				sample = (1.-v) * sample + v * next_sample;
 			}
+#endif
+			buffer_data[i] = sample;
+			speed_position = next_position;
 		}
+//if(fp) fclose(fp);
 	}
 
+	if( result )
+		bzero(buffer_data, fragment_len*sizeof(*buffer_data));
 	return result;
 }
 
@@ -704,10 +609,7 @@ if(debug) printf("AModule::render %d %jd\n", __LINE__, fragment_len);
 				}
 			}
 if(debug) printf("AModule::render %d start_position=%jd end_position=%jd fragment_len=%jd\n",
-__LINE__,
-start_position,
-end_position,
-fragment_len);
+ __LINE__, start_position, end_position, fragment_len);
 
 			if(direction == PLAY_REVERSE)
 			{
diff --git a/cinelerra-5.1/cinelerra/amodule.h b/cinelerra-5.1/cinelerra/amodule.h
index 1d17bf0f..128b2808 100644
--- a/cinelerra-5.1/cinelerra/amodule.h
+++ b/cinelerra-5.1/cinelerra/amodule.h
@@ -55,7 +55,8 @@ public:
 	~AModuleResample();
 
 // All positions are in source sample rate
-	int read_samples(Samples *buffer, int64_t start, int64_t len);
+	int read_samples(Samples *buffer,
+		int64_t start, int64_t len, int direction);
 
 	AModule *module;
 // output for nested EDL if resampled
@@ -77,21 +78,13 @@ public:
 	CICache* get_cache();
 
 	int import_samples(AEdit *playable_edit,
-		int64_t start_project,
-		int64_t edit_startproject,
-		int64_t edit_startsource,
-		int direction,
-		int sample_rate,
-		Samples *buffer,
-		int64_t fragment_len);
-
-
+		int64_t start_project, int64_t edit_startproject, int64_t edit_startsource,
+		int direction, int sample_rate, Samples *buffer, int64_t fragment_len);
 	int render(Samples *buffer,
-		int64_t input_len,
-		int64_t input_position,
-		int direction,
-		int sample_rate,
-		int use_nudge);
+		int64_t input_len, int64_t input_position, int direction,
+		int sample_rate, int use_nudge);
+	int read_samples(Samples *buffer,
+		int64_t start, int64_t len, int direction);
 	int get_buffer_size();
 
 	AttachmentPoint* new_attachment(Plugin *plugin);
diff --git a/cinelerra-5.1/cinelerra/canvas.C b/cinelerra-5.1/cinelerra/canvas.C
index 93507c3e..410145f0 100644
--- a/cinelerra-5.1/cinelerra/canvas.C
+++ b/cinelerra-5.1/cinelerra/canvas.C
@@ -767,16 +767,22 @@ void Canvas::clear_borders(EDL *edl)
 {
 	BC_WindowBase *window = get_canvas();
 	if( !window ) return;
-
 	int window_w = window->get_w();
 	int window_h = window->get_h();
+	int color = get_clear_color();
+	window->set_color(color);
+
+	if( !edl ) {
+		window->draw_box(0, 0, window_w, window_h);
+		window->flash(0);
+		return;
+	}
+
 	float output_x1,output_y1, output_x2,output_y2;
 	float canvas_x1,canvas_y1, canvas_x2,canvas_y2;
 	get_transfers(edl,
 		output_x1, output_y1, output_x2, output_y2,
 		canvas_x1, canvas_y1, canvas_x2, canvas_y2);
-	int color = get_clear_color();
-	window->set_color(color);
 
 	if( canvas_y1 > 0 ) {
 		window->draw_box(0, 0, window_w, canvas_y1);
diff --git a/cinelerra-5.1/cinelerra/indexfile.C b/cinelerra-5.1/cinelerra/indexfile.C
index 3e1ce389..3c6fd97f 100644
--- a/cinelerra-5.1/cinelerra/indexfile.C
+++ b/cinelerra-5.1/cinelerra/indexfile.C
@@ -232,6 +232,15 @@ void IndexFile::delete_index(Preferences *preferences,
 	remove_file(index_filename);
 }
 
+void IndexFile::delete_index_files(Preferences *preferences,
+	Indexable *indexable)
+{
+	delete_index(preferences, indexable, ".toc");
+	delete_index(preferences, indexable, ".idx");
+	delete_index(preferences, indexable, ".mkr");
+}
+
+
 int IndexFile::open_file()
 {
 	int result = 0;
diff --git a/cinelerra-5.1/cinelerra/indexfile.h b/cinelerra-5.1/cinelerra/indexfile.h
index dd38e9b8..63204631 100644
--- a/cinelerra-5.1/cinelerra/indexfile.h
+++ b/cinelerra-5.1/cinelerra/indexfile.h
@@ -60,6 +60,8 @@ public:
 	int interrupt_index();
 	static void delete_index(Preferences *preferences,
 		Indexable *indexable, const char *suffix=0);
+	static void delete_index_files(Preferences *preferences,
+		Indexable *indexable);
 	static int get_index_filename(char *source_filename,
 		char *index_directory,
 		char *index_filename,
diff --git a/cinelerra-5.1/cinelerra/main.C b/cinelerra-5.1/cinelerra/main.C
index 6e0b6d5e..4b04a11b 100644
--- a/cinelerra-5.1/cinelerra/main.C
+++ b/cinelerra-5.1/cinelerra/main.C
@@ -145,6 +145,7 @@ int main(int argc, char *argv[])
 // handle command line arguments first
 	srand(time(0));
 	ArrayList<char*> filenames;
+	filenames.set_array_delete();
 	FileSystem fs;
 
 	time_t st; time(&st);
diff --git a/cinelerra-5.1/cinelerra/mwindow.C b/cinelerra-5.1/cinelerra/mwindow.C
index 89d188de..03e265e6 100644
--- a/cinelerra-5.1/cinelerra/mwindow.C
+++ b/cinelerra-5.1/cinelerra/mwindow.C
@@ -3688,6 +3688,26 @@ void MWindow::update_project(int load_mode)
 	if(debug) PRINT_TRACE
 }
 
+void MWindow::update_preferences(Preferences *prefs)
+{
+	if( prefs != preferences )
+		preferences->copy_from(prefs);
+	if( cwindow->playback_engine )
+		cwindow->playback_engine->preferences->copy_from(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);
+	}
+	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);
+	}
+}
+
 void MWindow::update_vwindow()
 {
 	for( int i=0; i<vwindows.size(); ++i ) {
@@ -3718,8 +3738,9 @@ void MWindow::rebuild_indices()
 //printf("MWindow::rebuild_indices 1 %s\n", indexable->path);
 		remove_indexfile(indexable);
 // Schedule index build
-		IndexState *index_state = indexable->index_state;
-		index_state->index_status = INDEX_NOTTESTED;
+		indexable->index_state->remove_user();
+		indexable->index_state = new IndexState;
+		IndexFile::delete_index_files(preferences, indexable);
 		if( indexable->is_asset ) {
 			Asset *asset = (Asset *)indexable;
 			if( asset->format != FILE_PCM ) {
@@ -3733,6 +3754,9 @@ void MWindow::rebuild_indices()
 		}
 		mainindexes->add_next_asset(0, indexable);
 	}
+// still in render engine
+	sync_parameters(CHANGE_ALL);
+	awindow->gui->async_update_assets();
 	mainindexes->start_build();
 }
 
@@ -4078,9 +4102,16 @@ void MWindow::remove_asset_from_caches(Asset *asset)
 		if( vwindow->playback_engine->video_cache )
 			vwindow->playback_engine->video_cache->delete_entry(asset);
 	}
+	for(int i = 0; i < zwindows.size(); i++) {
+		ZWindow *zwindow = zwindows[i];
+		if( !zwindow->is_running() ) continue;
+		if( zwindow->zgui->playback_engine->audio_cache )
+			zwindow->zgui->playback_engine->audio_cache->delete_entry(asset);
+		if( zwindow->zgui->playback_engine->video_cache )
+			zwindow->zgui->playback_engine->video_cache->delete_entry(asset);
+	}
 }
 
-
 void MWindow::remove_assets_from_project(int push_undo, int redraw, int delete_indexes,
 		ArrayList<Indexable*> *drag_assets, ArrayList<EDL*> *drag_clips)
 {
diff --git a/cinelerra-5.1/cinelerra/mwindow.h b/cinelerra-5.1/cinelerra/mwindow.h
index 0e6db95e..513e1bfe 100644
--- a/cinelerra-5.1/cinelerra/mwindow.h
+++ b/cinelerra-5.1/cinelerra/mwindow.h
@@ -181,6 +181,7 @@ public:
 		int overwrite);
 // Reset everything for a load
 	void update_project(int load_mode);
+	void update_preferences(Preferences *prefs);
 	void update_vwindow();
 // Fit selected time to horizontal display range
 	void fit_selection();
@@ -231,7 +232,6 @@ public:
 // Not wanted for loading backups.
 		int update_filename = 1);
 
-
 // Print out plugins which are referenced in the EDL but not loaded.
 	void test_plugins(EDL *new_edl, char *path);
 
diff --git a/cinelerra-5.1/cinelerra/mwindowgui.C b/cinelerra-5.1/cinelerra/mwindowgui.C
index 2350f92e..248a5600 100644
--- a/cinelerra-5.1/cinelerra/mwindowgui.C
+++ b/cinelerra-5.1/cinelerra/mwindowgui.C
@@ -2291,7 +2291,7 @@ int FFMpegToggle::handle_event()
 	set_tooltip(ffmpeg_early_probe ? FFMPEG_EARLY_TIP : FFMPEG_LATE_TIP);
 	mwindow->preferences->set_file_probe_armed("FFMPEG_Early", ffmpeg_early_probe);
 	mwindow->preferences->set_file_probe_armed("FFMPEG_Late", !ffmpeg_early_probe);
-
+	mwindow->update_preferences(mwindow->preferences);
 	mwindow->show_warning(&mwindow->preferences->warn_indexes,
 		_("Changing the base codecs may require rebuilding indexes."));
 	return 1;
diff --git a/cinelerra-5.1/cinelerra/preferencesthread.C b/cinelerra-5.1/cinelerra/preferencesthread.C
index b085e13b..e4f050be 100644
--- a/cinelerra-5.1/cinelerra/preferencesthread.C
+++ b/cinelerra-5.1/cinelerra/preferencesthread.C
@@ -252,7 +252,7 @@ int PreferencesThread::apply_settings()
 	}
 
 	mwindow->edl->copy_session(edl, 1);
-	mwindow->preferences->copy_from(preferences);
+	mwindow->update_preferences(preferences);
 
 	BC_Signals::set_catch_segv(mwindow->preferences->trap_sigsegv);
 	BC_Signals::set_catch_intr(mwindow->preferences->trap_sigintr);
diff --git a/cinelerra-5.1/cinelerra/record.C b/cinelerra-5.1/cinelerra/record.C
index 4b8accd3..2dd9e2c5 100644
--- a/cinelerra-5.1/cinelerra/record.C
+++ b/cinelerra-5.1/cinelerra/record.C
@@ -474,9 +474,7 @@ void Record::activate_batch(int number)
 
 void Record::delete_index_file(Asset *asset)
 {
-	IndexFile::delete_index(mwindow->preferences, asset, ".toc");
-	IndexFile::delete_index(mwindow->preferences, asset, ".idx");
-	IndexFile::delete_index(mwindow->preferences, asset, ".mkr");
+	IndexFile::delete_index_files(mwindow->preferences, asset);
 }
 
 void Record::delete_batch()
diff --git a/cinelerra-5.1/cinelerra/resample.C b/cinelerra-5.1/cinelerra/resample.C
index 9e51a994..8ebd90dc 100644
--- a/cinelerra-5.1/cinelerra/resample.C
+++ b/cinelerra-5.1/cinelerra/resample.C
@@ -34,7 +34,9 @@
 
 Resample::Resample()
 {
-	old = new double[BLACKSIZE];
+	old.allocate(BLACKSIZE, 0);
+	double *old_data = old.get_data();
+	memset(old_data, 0, BLACKSIZE*sizeof(*old_data));
 	resample_init = 0;
 	last_ratio = 0;
 	output_temp = 0;
@@ -51,22 +53,15 @@ Resample::Resample()
 
 Resample::~Resample()
 {
-	delete [] old;
 	delete [] output_temp;
 	delete input;
 }
 
-int Resample::read_samples(Samples *buffer, int64_t start, int64_t len)
+int Resample::read_samples(Samples *buffer, int64_t start, int64_t len, int direction)
 {
 	return 0;
 }
 
-int Resample::get_direction()
-{
-	return direction;
-}
-
-
 void Resample::reset()
 {
 	resample_init = 0;
@@ -75,26 +70,28 @@ void Resample::reset()
 	input_position = 0;
 }
 
-double Resample::blackman(int i, double offset, double fcn, int l)
+void Resample::blackman(double fcn, int filter_l)
 {
-  /* This algorithm from:
-SIGNAL PROCESSING ALGORITHMS IN FORTRAN AND C
-S.D. Stearns and R.A. David, Prentice-Hall, 1992
-  */
-
-	double bkwn;
-	double wcn = (M_PI * fcn);
-	double dly = l / 2.0;
-	double x = i-offset;
-	if(x < 0) x = 0;
-	else
-	if(x > l) x = l;
-
-	bkwn = 0.42 - 0.5 * cos((x * 2) * M_PI /l) + 0.08 * cos((x * 4) * M_PI /l);
-	if(fabs(x - dly) < 1e-9)
-  		return wcn / M_PI;
-    else
-    	return (sin((wcn * (x - dly))) / (M_PI * (x - dly)) * bkwn);
+	double wcn = M_PI * fcn;
+	double ctr = filter_l / 2.0;
+	double cir = 2*M_PI/filter_l;
+	for( int j=0; j<=2*BPC; ++j ) {
+		double offset = (j-BPC) / (2.*BPC);  // -0.5 ... 0.5
+		for( int i=0; i<=filter_l; ++i ) {
+			double x = i - offset;
+			bclamp(x, 0,filter_l);
+			double v, dx = x - ctr;
+			if( fabs(dx) >= 1e-9 ) {
+				double curve = sin(wcn * dx) / (M_PI * dx);
+				double th = x * cir;
+				double blkmn = 0.42 - 0.5 * cos(th) + 0.08 * cos(2*th);
+				v = blkmn * curve;
+			}
+			else
+				v = fcn;
+			blackfilt[j][i] = v;
+		}
+	}
 }
 
 
@@ -107,148 +104,83 @@ int Resample::get_output_size()
 // {
 // 	memcpy(output, output_temp, size * sizeof(double));
 // // Shift leftover forward
-// 	for(int i = size; i < output_size; i++)
+// 	for( int i = size; i < output_size; i++ )
 // 		output_temp[i - size] = output_temp[i];
 // 	output_size -= size;
 // }
 
 
+// starts odd = (even-1)
+#define FILTER_N (BLACKSIZE-6)
+#define FILTER_L (FILTER_N - (~FILTER_N & 1));
 
-void Resample::resample_chunk(Samples *input_buffer,
-	int64_t in_len,
-	int in_rate,
-	int out_rate)
+void Resample::resample_chunk(Samples *input_buffer, int64_t in_len,
+	int in_rate, int out_rate)
 {
-	double resample_ratio = (double)in_rate / out_rate;
-  	int filter_l;
-	double fcn, intratio;
-	double offset, xvalue;
-	int num_used;
-	int i, j, k;
-	double *input = input_buffer->get_data();
 //printf("Resample::resample_chunk %d in_len=%jd input_size=%d\n",
 // __LINE__, in_len, input_size);
-
-  	intratio = (fabs(resample_ratio - floor(.5 + resample_ratio)) < .0001);
-	fcn = .90 / resample_ratio;
-	if(fcn > .90) fcn = .90;
-	filter_l = BLACKSIZE - 6;
-/* must be odd */
-	if(0 == filter_l % 2 ) --filter_l;
-
-/* if resample_ratio = int, filter_l should be even */
-  	filter_l += (int)intratio;
-
+	double *input = input_buffer->get_data();
+	double resample_ratio = (double)in_rate / out_rate;
+	double fcn = .90 / resample_ratio;
+	if( fcn > .90 ) fcn = .90;
+	int filter_l = FILTER_L;
+// if resample_ratio = int, filter_l should include right edge
+	if( fabs(resample_ratio - floor(.5 + resample_ratio)) < .0001 )
+		++filter_l;
 // Blackman filter initialization must be called whenever there is a
 // sampling ratio change
-	if(!resample_init || last_ratio != resample_ratio)
-	{
+	if( !resample_init || last_ratio != resample_ratio ) {
 		resample_init = 1;
+		last_ratio = resample_ratio;
+		blackman(fcn, filter_l);
 		itime = 0;
-		bzero(old, sizeof(double) * BLACKSIZE);
+	}
 
-// precompute blackman filter coefficients
-    	for (j = 0; j <= 2 * BPC; ++j)
-		{
-			for(j = 0; j <= 2 * BPC; j++)
-			{
-				offset = (double)(j - BPC) / (2 * BPC);
-				for(i = 0; i <= filter_l; i++)
-				{
-					blackfilt[j][i] = blackman(i, offset, fcn, filter_l);
-				}
-			}
+	double filter_l2 = filter_l/2.;
+	int l2 = filter_l2;
+	int64_t end_time = itime + in_len + l2;
+	int64_t out_time = end_time / resample_ratio + 1;
+	int64_t demand = out_time - output_position;
+	if( demand >= output_allocation ) {
+// demand 2**n buffer
+		int64_t new_allocation = output_allocation ? output_allocation : 16384;
+		while( new_allocation < demand ) new_allocation <<= 1;
+		double *new_output = new double[new_allocation];
+		if( output_temp ) {
+			memmove(new_output, output_temp, output_allocation*sizeof(double));
+			delete [] output_temp;
 		}
+		output_temp = new_output;
+		output_allocation = new_allocation;
 	}
 
 // Main loop
-	double *inbuf_old = old;
-	for(k = 0; 1; k++)
-	{
-		double time0;
-		int joff;
-
-		time0 = k * resample_ratio;
-		j = (int)floor(time0 - itime);
-
-//		if(j + filter_l / 2 >= input_size) break;
-		if(j + filter_l / 2 >= in_len) break;
-
-/* blackman filter.  by default, window centered at j+.5(filter_l%2) */
-/* but we want a window centered at time0.   */
-		offset = (time0 - itime - (j + .5 * (filter_l % 2)));
-		joff = (int)floor((offset * 2 * BPC) + BPC + .5);
-		xvalue = 0;
-
-
-		for(i = 0; i <= filter_l; i++)
-		{
-			int j2 = i + j - filter_l / 2;
-//printf("j2=%d\n", j2);
-			double y = ((j2 < 0) ? inbuf_old[BLACKSIZE + j2] : input[j2]);
-
-			xvalue += y * blackfilt[joff][i];
-		}
-
-
-		if(output_allocation <= output_size)
-		{
-			double *new_output = 0;
-			int64_t new_allocation = output_allocation ? (output_allocation * 2) : 16384;
-			new_output = new double[new_allocation];
-			if(output_temp)
-			{
-				bcopy(output_temp, new_output, output_allocation * sizeof(double));
-				delete [] output_temp;
-			}
-
-			output_temp = new_output;
-			output_allocation = new_allocation;
-		}
-
+	double *old_data = old.get_data();
+	double ctr_pos = 0;
+	int otime = 0, last_used = 0;
+	while( output_size < output_allocation ) {
+		double in_pos = otime * resample_ratio;
+// window centered at ctr_pos
+		ctr_pos = in_pos + itime;
+		double pos = ctr_pos - filter_l2;
+		int ipos = floor(pos);
+		last_used = ipos + filter_l;
+		if( last_used >= in_len ) break;
+		double fraction = pos - ipos;
+		int phase = floor(fraction * 2*BPC + .5);
+		int i = ipos, j = filter_l;  // fir filter
+		double xvalue = 0, *filt = blackfilt[phase];
+		for( ; j>=0 && i<0; ++i,--j ) xvalue += *filt++ * old_data[BLACKSIZE + i];
+		for( ; j>=0;        ++i,--j ) xvalue += *filt++ * input[i];
 		output_temp[output_size++] = xvalue;
+		++otime;
 	}
-
-	num_used = MIN(in_len, j + filter_l / 2);
-	itime += num_used - k * resample_ratio;
-	for(i = 0; i < BLACKSIZE; i++)
-		inbuf_old[i] = input[num_used + i - BLACKSIZE];
-
-	last_ratio = resample_ratio;
-
-}
-
-int Resample::read_chunk(Samples *input,
-	int64_t len)
-{
-	int fragment = len;
-	if(direction == PLAY_REVERSE &&
-		input_position - len < 0)
-	{
-		fragment = input_position;
-	}
-
-	int result = read_samples(input, input_position, fragment);
-
-	if(direction == PLAY_FORWARD)
-	{
-		input_position += fragment;
-	}
-	else
-	{
-		input_position -= fragment;
-// Mute unused part of buffer
-		if(fragment < len)
-		{
-			bzero(input->get_data() + fragment,
-				(len - fragment) * sizeof(double));
-		}
-	}
-
-	return result;
+// move ctr_pos backward by in_len as new itime offset
+// the next read will be in the history, itime is negative
+	itime = ctr_pos - in_len;
+	memmove(old_data, input+in_len-BLACKSIZE, BLACKSIZE*sizeof(double));
 }
 
-
 void Resample::reverse_buffer(double *buffer, int64_t len)
 {
 	double *ap = buffer;
@@ -260,76 +192,50 @@ void Resample::reverse_buffer(double *buffer, int64_t len)
 	}
 }
 
+int Resample::set_input_position(int64_t in_pos, int in_dir)
+{
+	reset();
+	input_position = in_pos;
+	direction = in_dir;
+// update old, just before/after input going fwd/rev;
+	int dir = direction == PLAY_FORWARD ? -1 : 1;
+	in_pos += dir * BLACKSIZE;
+	return read_samples(&old, in_pos, BLACKSIZE, in_dir);
+}
 
-int Resample::resample(Samples *output,
-	int64_t out_len,
-	int in_rate,
-	int out_rate,
-	int64_t out_position,
-	int direction)
+int Resample::resample(Samples *output, int64_t out_len,
+		int in_rate, int out_rate, int64_t out_position, int direction)
 {
 	int result = 0;
-
-
-//printf("Resample::resample 1 output_position=%jd out_position=%jd out_len=%jd\n",
-// output_position, out_position, out_len);
-// Changed position
-	if(labs(this->output_position - out_position) > 0 ||
-		direction != this->direction)
-	{
-		reset();
-
-// Compute starting point in input rate.
-		this->input_position = out_position * in_rate / out_rate;
-		this->direction = direction;
+	if( this->output_position != out_position ||
+	    this->direction != direction ) {
+//printf("missed  %jd!=%jd\n", output_position, out_position);
+// starting point in input rate.
+		int64_t in_pos = out_position * in_rate / out_rate;
+		set_input_position(in_pos, direction);
 	}
+//else
+//printf("matched %jd==%jd\n", output_position, out_position);
 
-
+	int dir = direction == PLAY_REVERSE ? -1 : 1;
 	int remaining_len = out_len;
 	double *output_ptr = output->get_data();
-	while(remaining_len > 0 && !result)
-	{
-// Drain output buffer
-		if(output_size)
-		{
-			int fragment_len = output_size;
-			if(fragment_len > remaining_len) fragment_len = remaining_len;
-
-//printf("Resample::resample 1 %d %d\n", remaining_len, output_size);
-			bcopy(output_temp, output_ptr, fragment_len * sizeof(double));
-
-// Shift leftover forward
-			for(int i = fragment_len; i < output_size; i++)
-				output_temp[i - fragment_len] = output_temp[i];
-
-			output_size -= fragment_len;
-			remaining_len -= fragment_len;
-			output_ptr += fragment_len;
+	while( remaining_len > 0 && !result ) {
+		if( output_size ) {
+			int len = bmin(output_size, remaining_len);
+			memmove(output_ptr, output_temp, len*sizeof(double));
+			memmove(output_temp, output_temp+len, (output_size-=len)*sizeof(double));
+			output_ptr += len;  remaining_len -= len;
 		}
-
-// Import new samples
-//printf("Resample::resample 2 %d\n", remaining_len);
-		if(remaining_len > 0)
-		{
-//printf("Resample::resample 3 input_size=%d out_position=%d\n", input_size, out_position);
-			result = read_chunk(input, input_size);
-			resample_chunk(input,
-				input_size,
-				in_rate,
-				out_rate);
+		if( remaining_len > 0 ) {
+			result = read_samples(input, input_position, input_size, direction);
+			if( result ) break;
+			resample_chunk(input, input_size, in_rate, out_rate);
+			input_position += dir * input_size;
 		}
 	}
-
-
-	if(direction == PLAY_FORWARD)
-		this->output_position = out_position + out_len;
-	else
-		this->output_position = out_position - out_len;
-
-//printf("Resample::resample 2 %d %d\n", this->output_position, out_position);
-//printf("Resample::resample 2 %d %d\n", out_len, output_size);
-
-//printf("Resample::resample 2 %d\n", output_size);
+	if( !result )
+		this->output_position = out_position + dir * out_len;
 	return result;
 }
 
diff --git a/cinelerra-5.1/cinelerra/resample.h b/cinelerra-5.1/cinelerra/resample.h
index b80bb6bd..d58e1e52 100644
--- a/cinelerra-5.1/cinelerra/resample.h
+++ b/cinelerra-5.1/cinelerra/resample.h
@@ -29,7 +29,7 @@
 #define BLACKSIZE 25
 
 #include "resample.inc"
-#include "samples.inc"
+#include "samples.h"
 #include <stdint.h>
 
 class Resample
@@ -41,57 +41,43 @@ public:
 // All positions are in file sample rate
 // This must reverse the buffer during reverse playback
 // so the filter always renders forward.
-	virtual int read_samples(Samples *buffer, int64_t start, int64_t len);
+	virtual int read_samples(Samples *buffer,
+		int64_t start, int64_t len, int direction);
 
 // Resample from the file handler and store in *output.
 // Returns 1 if the input reader failed.
-	int resample(Samples *samples,
-		int64_t out_len,
-		int in_rate,
-		int out_rate,
 // Starting sample in output samplerate
 // If reverse, the end of the buffer.
-		int64_t out_position,
-		int direction);
-
-	int get_direction();
-
+	int resample(Samples *samples,
+		int64_t out_len, int in_rate, int out_rate,
+		int64_t out_position, int direction);
 	static void reverse_buffer(double *buffer, int64_t len);
 
 // Reset after seeking
 	void reset();
 
 private:
-	double blackman(int i, double offset, double fcn, int l);
+	void blackman(double fcn, int l);
+	int set_input_position(int64_t in_pos, int in_dir);
 // Query output temp
 	int get_output_size();
 //	void read_output(Samples *output, int size);
 // Resamples input and dumps it to output_temp
-	void resample_chunk(Samples *input,
-		int64_t in_len,
-		int in_rate,
-		int out_rate);
-	int read_chunk(Samples *input,
-		int64_t len);
-
-// History buffer for resampling.
-	double *old;
-	double itime;
-
-
+	void resample_chunk(Samples *input, int64_t in_len,
+			int in_rate, int out_rate);
 
+	int direction;
 // Unaligned resampled output
 	double *output_temp;
-
-
 // Total samples in unaligned output
 	int64_t output_size;
-
-	int direction;
 // Allocation of unaligned output
 	int64_t output_allocation;
+// History buffer for resampling.
+	Samples old;
 // input chunk
 	Samples *input;
+	double itime;
 // Position of source in source sample rate.
 	int64_t input_position;
 	int64_t input_size;
diff --git a/cinelerra-5.1/cinelerra/virtualaconsole.C b/cinelerra-5.1/cinelerra/virtualaconsole.C
index 4afc12f7..fab1b6a7 100644
--- a/cinelerra-5.1/cinelerra/virtualaconsole.C
+++ b/cinelerra-5.1/cinelerra/virtualaconsole.C
@@ -205,31 +205,30 @@ if(debug) printf("VirtualAConsole::process_buffer %d\n", __LINE__);
 		for( int i=0; i<audio_channels; ++i )
 			audio_out_packed[i] = arender->audio_out[i]->get_data();
 
+// Time stretch the fragment to the real_output size
 		for( int i=0; i<audio_channels; ++i ) {
 			double *current_buffer = audio_out_packed[i];
-// Time stretch the fragment to the real_output size
-			if( speed > 1 ) {
-				int out = 0;
-				for( int in=0; in<len; ) {
-// samples in real output buffer for each to sample rendered.
-					int end = (out+1) * speed;
-					if( end > len ) end = len;
-					int k = end - in;
-					double sample = 0;
-					while( in < end ) sample += current_buffer[in++];
-					if( k > 0 ) sample /= k;
+			if( speed > 1 ) {  // buffer gets shorter
+				int in = 0, out = 0;
+				while( in < len ) {
+					int next = (out+1) * speed;
+					if( next > len) next = len;
+					double sample = current_buffer[in];
+					for( int i=in; ++i<next; ) sample += current_buffer[i];
+					int l = next - in;
+					if( l > 1 ) sample /= l;
 					current_buffer[out++] = sample;
+					in = next;
 				}
 				real_output_len = out;
 			}
-			else if( speed < 1 ) {
-				int end = len / speed;
-				real_output_len = end;
-				for( int in=len, out=end; --in>=0; ) {
-// samples rendered in real output buffer sample.
-					int start = in / speed;
-					double v = current_buffer[in];
-					while( --out >= start ) current_buffer[out] = v;
+			else if( speed < 1 ) {  // buffer gets longer
+				real_output_len = len / speed;
+				int in = len, out = real_output_len;
+				while( in > 0 && out > 0 ) {
+					double sample = current_buffer[--in];
+					int next = in / speed;
+					while( out > next ) current_buffer[--out] = sample;
 				}
 			}
 			else
diff --git a/cinelerra-5.1/cinelerra/zwindow.h b/cinelerra-5.1/cinelerra/zwindow.h
index 3019d438..fcd05699 100644
--- a/cinelerra-5.1/cinelerra/zwindow.h
+++ b/cinelerra-5.1/cinelerra/zwindow.h
@@ -28,7 +28,6 @@
 #include "edl.inc"
 #include "filexml.inc"
 #include "mwindow.inc"
-#include "playbackengine.inc"
 #include "renderengine.inc"
 #include "zwindowgui.inc"
 
diff --git a/cinelerra-5.1/ffmpeg/video/pro.dfl b/cinelerra-5.1/ffmpeg/video/pro.dfl
index b317d6b6..f1137e2f 100644
--- a/cinelerra-5.1/ffmpeg/video/pro.dfl
+++ b/cinelerra-5.1/ffmpeg/video/pro.dfl
@@ -1 +1 @@
-med422p10.pro
+prores.pro
diff --git a/cinelerra-5.1/libzmpeg3/audio/audio.C b/cinelerra-5.1/libzmpeg3/audio/audio.C
index 4a98bbf4..5d88c169 100644
--- a/cinelerra-5.1/libzmpeg3/audio/audio.C
+++ b/cinelerra-5.1/libzmpeg3/audio/audio.C
@@ -720,9 +720,10 @@ decode_audio(void *output_v, int atyp, int channel, int len)
 //  tell/eof %jd/%d\n", output_position, output_size, aud_pos, end_pos,
 //  demand, demux->tell_byte(), demux->eof());
     if( demux->eof() ) break;
+    int needed_history = len > AUDIO_HISTORY ? len : AUDIO_HISTORY;
     /* if overflowing, shift audio back */
-    if( src->seekable && output_size > AUDIO_HISTORY ) {
-      int diff = demand + output_size - AUDIO_HISTORY;
+    if( src->seekable && output_size > needed_history ) {
+      int diff = demand + output_size - needed_history;
       shift_audio(diff);
     }
     int samples = read_frame(1);
@@ -742,7 +743,7 @@ decode_audio(void *output_v, int atyp, int channel, int len)
   j = track->track_position() - output_position;
   k = output_size - j;
   if( k > len ) k = len;
-  float *out = channel < output_channels ?
+  float *out = j >= 0 && channel < output_channels ?
     output[channel] + j : 0;
 
   /* transmit data in specified format */