From dbc376fc2ffae75a0fb1f3e1382eab79c0550092 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Barnab=C3=A1s=20P=C5=91cze?= <pobrn@protonmail.com>
Date: Wed, 23 Jul 2025 14:39:46 +0200
Subject: [PATCH] spa: libcamera: source: provide value labels if available

For enumerated controls of type `libcamera::ControlTypeInteger32`, libcamera
provides the names of the enumerators, so add them to `SPA_PROP_INFO_labels`.

(cherry picked from commit 8673f17c0ab8937ac304edd06348569edf999af7)
---
 spa/plugins/libcamera/libcamera-source.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/spa/plugins/libcamera/libcamera-source.cpp b/spa/plugins/libcamera/libcamera-source.cpp
index 3f3d6b2d9..d3b6ca49b 100644
--- a/spa/plugins/libcamera/libcamera-source.cpp
+++ b/spa/plugins/libcamera/libcamera-source.cpp
@@ -856,6 +856,21 @@ spa_pod *control_details_to_pod(spa_pod_builder& b,
 		}
 
 		spa_pod_builder_pop(&b, &f);
+
+		if (cid.type() == libcamera::ControlTypeInteger32) {
+			spa_pod_builder_prop(&b, SPA_PROP_INFO_labels, 0);
+
+			spa_pod_builder_push_struct(&b, &f);
+			for (const auto& cv : cinfo.values()) {
+				auto it = cid.enumerators().find(cv.get<int32_t>());
+				if (it == cid.enumerators().end())
+					continue;
+
+				spa_pod_builder_int(&b, it->first);
+				spa_pod_builder_string_len(&b, it->second.data(), it->second.size());
+			}
+			spa_pod_builder_pop(&b, &f);
+		}
 	}
 
 	return reinterpret_cast<spa_pod *>(spa_pod_builder_pop(&b, &f));