From f6ce23cbe32fdd17e2593c7bd37dfcba0e6e72cc Mon Sep 17 00:00:00 2001
From: Wim Taymans <wtaymans@redhat.com>
Date: Wed, 16 Jun 2021 11:45:49 +0200
Subject: [PATCH] metadata: add vargs format method for metadata values

---
 src/pipewire/impl-metadata.c | 32 ++++++++++++++++++++++++++++++++
 src/pipewire/impl-metadata.h |  4 ++++
 2 files changed, 36 insertions(+)

diff --git a/src/pipewire/impl-metadata.c b/src/pipewire/impl-metadata.c
index 2a49ff1d3..6b7a2f548 100644
--- a/src/pipewire/impl-metadata.c
+++ b/src/pipewire/impl-metadata.c
@@ -570,3 +570,35 @@ int pw_impl_metadata_set_property(struct pw_impl_metadata *metadata,
 {
 	return impl_set_property(metadata->metadata, subject, key, type, value);
 }
+
+SPA_EXPORT
+int pw_impl_metadata_set_propertyf(struct pw_impl_metadata *metadata,
+			uint32_t subject, const char *key, const char *type,
+			const char *fmt, ...)
+{
+	va_list args;
+	int n = 0;
+	size_t size = 0;
+	char *p = NULL;
+
+	va_start(args, fmt);
+	n = vsnprintf(p, size, fmt, args);
+	va_end(args);
+	if (n < 0)
+		return -errno;
+
+	size = (size_t) n + 1;
+	p = malloc(size);
+	if (p == NULL)
+		return -errno;
+
+	va_start(args, fmt);
+	n = vsnprintf(p, size, fmt, args);
+	va_end(args);
+
+	if (n < 0) {
+		free(p);
+		return -errno;
+	}
+	return pw_impl_metadata_set_property(metadata, subject, key, type, p);
+}
diff --git a/src/pipewire/impl-metadata.h b/src/pipewire/impl-metadata.h
index a2ceb0b94..4e3076668 100644
--- a/src/pipewire/impl-metadata.h
+++ b/src/pipewire/impl-metadata.h
@@ -99,6 +99,10 @@ int pw_impl_metadata_set_property(struct pw_impl_metadata *metadata,
 			uint32_t subject, const char *key, const char *type,
 			const char *value);
 
+int pw_impl_metadata_set_propertyf(struct pw_impl_metadata *metadata,
+			uint32_t subject, const char *key, const char *type,
+			const char *fmt, ...) SPA_PRINTF_FUNC(5,6);
+
 /**
  * \}
  */