From 5b42da1be86b0388254f0d3acdb732a7874ebf14 Mon Sep 17 00:00:00 2001
From: "Juan A. Suarez Romero" <jasuarez@igalia.com>
Date: Wed, 9 Oct 2024 12:32:53 +0200
Subject: [PATCH] util/format: nr_channels is always <= 4

While the nr_channels is defined with 3 bits, which allows up to 7
channels, actually the number of channels is less or equal to 4.

This adds an assertion that helps static analyzers to avoid several
false positives related with this.

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Signed-off-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32589>
---
 src/util/format/u_format.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/util/format/u_format.h b/src/util/format/u_format.h
index 818c073025f..95976ec14a6 100644
--- a/src/util/format/u_format.h
+++ b/src/util/format/u_format.h
@@ -1361,6 +1361,8 @@ static inline unsigned
 util_format_get_nr_components(enum pipe_format format)
 {
    const struct util_format_description *desc = util_format_description(format);
+   assert(desc->nr_channels <= 4);
+
    return desc->nr_channels;
 }