From 25e51d815efa3f30b337fd79bdd831ade6a88033 Mon Sep 17 00:00:00 2001
From: Chris Kirmse <chris@athenascope.com>
Date: Thu, 30 May 2019 09:40:18 -0700
Subject: [PATCH] free cache in FrameMapper::Close()

- this hugely reduces the memory used by rendering a timeline
  with a lot of clips
- could be related to issue #239
---
 src/FrameMapper.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/FrameMapper.cpp b/src/FrameMapper.cpp
index ca2038a9..113171a2 100644
--- a/src/FrameMapper.cpp
+++ b/src/FrameMapper.cpp
@@ -651,6 +651,16 @@ void FrameMapper::Close()
 		// Close internal reader
 		reader->Close();
 
+		// Clear the fields & frames lists
+		fields.clear();
+		frames.clear();
+
+		// Mark as dirty
+		is_dirty = true;
+
+		// Clear cache
+		final_cache.Clear();
+
 		// Deallocate resample buffer
 		if (avr) {
 			SWR_CLOSE(avr);