From 9c46370234fe45437f0f64fab963a232cb3e9a46 Mon Sep 17 00:00:00 2001
From: Johannes Lorenz <j.git@lorenz-ho.me>
Date: Sat, 23 Sep 2023 00:00:02 +0200
Subject: [PATCH] Support LV2_BUF_SIZE__powerOf2BlockLength

---
 src/core/lv2/Lv2Manager.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/core/lv2/Lv2Manager.cpp b/src/core/lv2/Lv2Manager.cpp
index 9c62703e0..df6e5a7c1 100644
--- a/src/core/lv2/Lv2Manager.cpp
+++ b/src/core/lv2/Lv2Manager.cpp
@@ -35,6 +35,7 @@
 #include <QDebug>
 #include <QElapsedTimer>
 
+#include "AudioEngine.h"
 #include "Engine.h"
 #include "Plugin.h"
 #include "Lv2ControlBase.h"
@@ -156,6 +157,10 @@ Lv2Manager::Lv2Manager() :
 	m_supportedFeatureURIs.insert(LV2_BUF_SIZE__boundedBlockLength);
 	// block length is only changed initially in AudioEngine CTOR
 	m_supportedFeatureURIs.insert(LV2_BUF_SIZE__fixedBlockLength);
+	if (const auto fpp = Engine::audioEngine()->framesPerPeriod(); (fpp & (fpp - 1)) == 0)  // <=> ffp is power of 2 (for ffp > 0)
+	{
+		m_supportedFeatureURIs.insert(LV2_BUF_SIZE__powerOf2BlockLength);
+	}
 
 	auto supportOpt = [this](Lv2UridCache::Id id)
 	{