Add const to MIDI pkt pointer arguments

1 files changed, 2 insertions, 4 deletions

diff --git a/src/midi.h b/src/midi.h
index cab35e3..fb85833 100644
--- a/src/midi.h
+++ b/src/midi.h
@@ -59,14 +59,13 @@ typedef struct {
 
 // allocation / dellocation 
 extern midi_message_t *midi_alloc_message(size_t data_size);
-extern void midi_free_message(midi_message_t *pkt);
-extern size_t midi_message_size(midi_message_t *pkt);
+extern void midi_free_message(const midi_message_t *pkt);
+extern size_t midi_message_size(const midi_message_t *pkt);
 
 #endif
 
 
 // helper functions
-
 extern int midi_set_status(midi_message_t *pkt, midi_status_t status);
 extern int midi_set_channel(midi_message_t *pkt, unsigned channel);
 
@@ -77,6 +76,5 @@ extern int midi_note_off(midi_message_t *pkt, unsigned channel, midi_note_t note
 // optimization
 // extern int midi_thin_data(void *buffer, midi_message_t pkt[]);
 
-
 #endif	/* MIDI_H */