From 588649236b6ae38da7c8627ff7439aeff3c78798 Mon Sep 17 00:00:00 2001
From: Good Guy <good1.2guy@gmail.com>
Date: Sat, 12 Sep 2020 14:01:52 -0600
Subject: [PATCH] purge file_cache when starting rev read cache burst

---
 cinelerra-5.1/cinelerra/ffmpeg.C   | 30 ++++++++++++++++++++++++++----
 cinelerra-5.1/cinelerra/ffmpeg.h   |  5 +++++
 cinelerra-5.1/cinelerra/filebase.C | 14 --------------
 cinelerra-5.1/cinelerra/filebase.h |  4 ----
 4 files changed, 31 insertions(+), 22 deletions(-)

diff --git a/cinelerra-5.1/cinelerra/ffmpeg.C b/cinelerra-5.1/cinelerra/ffmpeg.C
index 57232271..f0eea9c5 100644
--- a/cinelerra-5.1/cinelerra/ffmpeg.C
+++ b/cinelerra-5.1/cinelerra/ffmpeg.C
@@ -1225,13 +1225,15 @@ int FFVideoStream::load(VFrame *vframe, int64_t pos)
 	while( ret>=0 && !flushed && curr_pos<=pos && --i>=0 ) {
 		ret = read_frame(frame);
 		if( ret > 0 ) {
-			if( frame->key_frame && seeking < 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);
+				ffmpeg->purge_cache();
+			}
+			if( ffmpeg->get_use_cache() && seeking > 0 && curr_pos < pos ) {
+				VFrame *cache_frame = ffmpeg->new_cache_frame(vframe, curr_pos);
 				if( cache_frame ) {
 					ret = convert_cmodel(cache_frame, frame);
-					ffmpeg->file_base->put_cache_frame();
+					ffmpeg->put_cache_frame();
 				}
 			}
 			++curr_pos;
@@ -2231,6 +2233,26 @@ int FFMPEG::scan_options(const char *options, AVDictionary *&opts, AVStream *st)
 	return ret;
 }
 
+VFrame *FFMPEG::new_cache_frame(VFrame *vframe, int64_t position)
+{
+	return file_base->file->new_cache_frame(vframe, position, 0);
+}
+
+void FFMPEG::put_cache_frame()
+{
+	return file_base->file->put_cache_frame();
+}
+
+int FFMPEG::get_use_cache()
+{
+	return file_base->file->get_use_cache();
+}
+
+void FFMPEG::purge_cache()
+{
+	file_base->file->purge_cache();
+}
+
 FFCodecRemap::FFCodecRemap()
 {
 	old_codec = 0;
diff --git a/cinelerra-5.1/cinelerra/ffmpeg.h b/cinelerra-5.1/cinelerra/ffmpeg.h
index aa01785a..9ceef154 100644
--- a/cinelerra-5.1/cinelerra/ffmpeg.h
+++ b/cinelerra-5.1/cinelerra/ffmpeg.h
@@ -368,6 +368,11 @@ public:
 	static double to_secs(int64_t time, AVRational time_base);
 	int info(char *text, int len);
 
+	VFrame *new_cache_frame(VFrame *vframe, int64_t position);
+	void put_cache_frame();
+	int get_use_cache();
+	void purge_cache();
+
 	int init_decoder(const char *filename);
 	int open_decoder();
 	int init_encoder(const char *filename);
diff --git a/cinelerra-5.1/cinelerra/filebase.C b/cinelerra-5.1/cinelerra/filebase.C
index e2e14891..dc73ccc5 100644
--- a/cinelerra-5.1/cinelerra/filebase.C
+++ b/cinelerra-5.1/cinelerra/filebase.C
@@ -299,17 +299,3 @@ int64_t FileBase::base_memory_usage()
 		history_allocated * history_channels * sizeof(double);
 }
 
-
-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 77893f9e..3fb8be42 100644
--- a/cinelerra-5.1/cinelerra/filebase.h
+++ b/cinelerra-5.1/cinelerra/filebase.h
@@ -132,10 +132,6 @@ 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;
-- 
2.26.2