-static void rpn(snd_midi_op_t *ops, void *drv, snd_midi_channel_t *chan, snd_midi_channel_set_t *chset);
-static void nrpn(snd_midi_op_t *ops, void *drv, snd_midi_channel_t *chan, snd_midi_channel_set_t *chset);
-static void sysex(snd_midi_op_t *ops, void *private, unsigned char *sysex, int len, snd_midi_channel_set_t *chset);
-static void all_sounds_off(snd_midi_op_t *ops, void *private, snd_midi_channel_t *chan);
-static void all_notes_off(snd_midi_op_t *ops, void *private, snd_midi_channel_t *chan);
-static void snd_midi_reset_controllers(snd_midi_channel_t *chan);
-static void reset_all_channels(snd_midi_channel_set_t *chset);
+static void rpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan,
+ struct snd_midi_channel_set *chset);
+static void nrpn(struct snd_midi_op *ops, void *drv, struct snd_midi_channel *chan,
+ struct snd_midi_channel_set *chset);
+static void sysex(struct snd_midi_op *ops, void *private, unsigned char *sysex,
+ int len, struct snd_midi_channel_set *chset);
+static void all_sounds_off(struct snd_midi_op *ops, void *private,
+ struct snd_midi_channel *chan);
+static void all_notes_off(struct snd_midi_op *ops, void *private,
+ struct snd_midi_channel *chan);
+static void snd_midi_reset_controllers(struct snd_midi_channel *chan);
+static void reset_all_channels(struct snd_midi_channel_set *chset);