ALSA: line6: Allow processing of raw incoming messages
Not all PODs use MIDI via USB data interface, thus allow avoiding
that code and instead using direct processing.
Signed-off-by: Andrej Krutak <dev@andree.sk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/line6/driver.h b/sound/usb/line6/driver.h
index d48c7d2..88cf1e7 100644
--- a/sound/usb/line6/driver.h
+++ b/sound/usb/line6/driver.h
@@ -147,15 +147,18 @@
/* URB for listening to POD data endpoint */
struct urb *urb_listen;
- /* Buffer for listening to POD data endpoint */
+ /* Buffer for incoming data from POD data endpoint */
unsigned char *buffer_listen;
- /* Buffer for message to be processed */
+ /* Buffer for message to be processed, generated from MIDI layer */
unsigned char *buffer_message;
- /* Length of message to be processed */
+ /* Length of message to be processed, generated from MIDI layer */
int message_length;
+ /* If MIDI is supported, buffer_message contains the pre-processed data;
+ * otherwise the data is only in urb_listen (buffer_incoming).
+ */
void (*process_message)(struct usb_line6 *);
void (*disconnect)(struct usb_line6 *line6);
};