From a30b335beb55dcd08b33f5822eb35c02dd4e1ebf Mon Sep 17 00:00:00 2001
From: Wim Taymans <wtaymans@redhat.com>
Date: Thu, 29 Sep 2022 12:44:42 +0200
Subject: [PATCH] channelmix: leave volume unchanged for unknown channel
 volumes

When we get an unknown number of channels, don't do anything, like it
used to be.
---
 spa/plugins/audioconvert/channelmix-ops.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spa/plugins/audioconvert/channelmix-ops.c b/spa/plugins/audioconvert/channelmix-ops.c
index 885fa9bcc..025b2a8eb 100644
--- a/spa/plugins/audioconvert/channelmix-ops.c
+++ b/spa/plugins/audioconvert/channelmix-ops.c
@@ -540,7 +540,7 @@ static void impl_channelmix_set_volume(struct channelmix *mix, float volume, boo
 				mix->matrix[i][j] = mix->matrix_orig[i][j] * volumes[i];
 			}
 		}
-	} else {
+	} else if (n_channel_volumes == 0) {
 		for (i = 0; i < dst_chan; i++) {
 			for (j = 0; j < src_chan; j++) {
 				mix->matrix[i][j] = mix->matrix_orig[i][j] * vol;