audio: make mp_chmap_to_str() return a stack-allocated string

Simplifies memory management.

1 files changed, 3 insertions, 1 deletions

diff --git a/audio/chmap.h b/audio/chmap.h
index c7851a8657..d0b9806ff5 100644
--- a/audio/chmap.h
+++ b/audio/chmap.h
@@ -120,7 +120,9 @@ void mp_chmap_reorder_to_lavc(struct mp_chmap *map);
 void mp_chmap_get_reorder(int dst[MP_NUM_CHANNELS], const struct mp_chmap *from,
                           const struct mp_chmap *to);
 
-char *mp_chmap_to_str(const struct mp_chmap *src);
+char *mp_chmap_to_str_buf(char *buf, size_t buf_size, const struct mp_chmap *src);
+#define mp_chmap_to_str(m) mp_chmap_to_str_buf((char[64]){0}, 64, (m))
+
 bool mp_chmap_from_str(struct mp_chmap *dst, bstr src);
 
 struct mp_log;