diff options
Diffstat (limited to 'drivers/staging/line6/midi.h')
-rw-r--r-- | drivers/staging/line6/midi.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/staging/line6/midi.h b/drivers/staging/line6/midi.h new file mode 100644 index 000000000000..c69fd118957b --- /dev/null +++ b/drivers/staging/line6/midi.h @@ -0,0 +1,87 @@ +/* + * Line6 Linux USB driver - 0.8.0 + * + * Copyright (C) 2004-2009 Markus Grabner (grabner@icg.tugraz.at) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, version 2. + * + */ + +#ifndef MIDI_H +#define MIDI_H + + +#include <sound/rawmidi.h> + +#include "midibuf.h" + + +#define MIDI_BUFFER_SIZE 1024 + + +struct snd_line6_midi { + /** + Pointer back to the Line6 driver data structure. + */ + struct usb_line6 *line6; + + /** + MIDI substream for receiving (or NULL if not active). + */ + struct snd_rawmidi_substream *substream_receive; + + /** + MIDI substream for transmitting (or NULL if not active). + */ + struct snd_rawmidi_substream *substream_transmit; + + /** + Number of currently active MIDI send URBs. + */ + int num_active_send_urbs; + + /** + Spin lock to protect updates of send_urb. + */ + spinlock_t send_urb_lock; + + /** + Spin lock to protect MIDI buffer handling. + */ + spinlock_t midi_transmit_lock; + + /** + Wait queue for MIDI transmission. + */ + wait_queue_head_t send_wait; + + /** + Bit mask for output MIDI channels. + */ + int midi_mask_transmit; + + /** + Bit mask for input MIDI channels. + */ + int midi_mask_receive; + + /** + Buffer for incoming MIDI stream. + */ + struct MidiBuffer midibuf_in; + + /** + Buffer for outgoing MIDI stream. + */ + struct MidiBuffer midibuf_out; +}; + + +extern int line6_init_midi(struct usb_line6 *line6); +extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data, + int length); + + +#endif |