From eebe4e467b45e051f6738e307da9eedbfb92491f Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Mon, 29 Mar 2021 14:48:01 +0200
Subject: [PATCH] VST3: pass a read-only state stream to the plugin #8642

see also 9e7cfdd8806 - this is a workaround for some plugins
that do not use the SDK and seek the stream using absolute
offsets.
---
 libs/ardour/vst3_plugin.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libs/ardour/vst3_plugin.cc b/libs/ardour/vst3_plugin.cc
index 0506f2d9a8..73fe843b97 100644
--- a/libs/ardour/vst3_plugin.cc
+++ b/libs/ardour/vst3_plugin.cc
@@ -2287,8 +2287,8 @@ VST3PI::load_state (RAMStream& stream)
 				rv = false;
 			}
 		} else if (is_equal_ID (i->_id, Vst::getChunkID (Vst::kControllerState))) {
-			stream.seek (i->_offset, IBStream::kIBSeekSet, &seek_result);
-			tresult res = _controller->setState (&stream);
+			ROMStream s (stream, i->_offset, i->_size);
+			tresult res = _controller->setState (&s);
 			if (res == kResultOk) {
 				synced = true;
 			}