From 263f1aeb66c5ec1231e80303a48e5ffde2c0026b Mon Sep 17 00:00:00 2001
From: Mattias Wadman <mattias.wadman@gmail.com>
Date: Tue, 18 Jan 2022 11:58:57 +0100
Subject: [PATCH] flac: Don't allow zero subframe sample size

Spec says sample size can be 4-32 but that is probably before correcting for waste bits
---
 format/flac/flac_frame.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/format/flac/flac_frame.go b/format/flac/flac_frame.go
index d1b1e43e..5401483c 100644
--- a/format/flac/flac_frame.go
+++ b/format/flac/flac_frame.go
@@ -378,8 +378,8 @@ func frameDecode(d *decode.D, in interface{}) interface{} {
 				}
 
 				subframeSampleSize := sampleSize - wastedBitsK
-				if subframeSampleSize < 0 {
-					d.Fatalf("negative subframeSampleSize %d", subframeSampleSize)
+				if subframeSampleSize < 1 {
+					d.Fatalf("subframeSampleSize %d < 1", subframeSampleSize)
 				}
 				// if channel is side, add en extra sample bit
 				// https://github.com/xiph/flac/blob/37e675b777d4e0de53ac9ff69e2aea10d92e729c/src/libFLAC/stream_decoder.c#L2040