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-rw-r--r--audio/chmap.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/audio/chmap.h b/audio/chmap.h
index d4cdc3ea85..fb3c118bf2 100644
--- a/audio/chmap.h
+++ b/audio/chmap.h
@@ -125,6 +125,7 @@ void mp_chmap_get_reorder(int src[MP_NUM_CHANNELS], const struct mp_chmap *from,
void mp_chmap_diff(const struct mp_chmap *a, const struct mp_chmap *b,
struct mp_chmap *diff);
+int mp_chmap_diffn(const struct mp_chmap *a, const struct mp_chmap *b);
bool mp_chmap_contains(const struct mp_chmap *a, const struct mp_chmap *b);