From 4f8a6e8e80a5e3ca9c85b3fc61be43f73429b17a Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Thu, 3 Apr 2025 21:01:45 +0200
Subject: [PATCH] Fix stretching mono files on multi-channel trigger slots

Like in the non-stretch case `chn % data.size ()` is used.
---
 libs/ardour/triggerbox.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libs/ardour/triggerbox.cc b/libs/ardour/triggerbox.cc
index 637060aa64..03d2593219 100644
--- a/libs/ardour/triggerbox.cc
+++ b/libs/ardour/triggerbox.cc
@@ -2178,10 +2178,10 @@ AudioTrigger::audio_run (BufferSet& bufs, samplepos_t start_sample, samplepos_t
 					 * the end of the region
 					 */
 
-					std::vector<Sample*> in(nchans);
+					float** in = (float**)alloca(nchans * sizeof (float*));
 
 					for (uint32_t chn = 0; chn < nchans; ++chn) {
-						in[chn] = data[chn] + read_index;
+						in[chn] = data[chn % data.size ()] + read_index;
 					}
 
 					/* Note: RubberBandStretcher's process() and retrieve() API's accepts Sample**