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Diffstat (limited to '')
| -rw-r--r-- | sound/usb/line6/midi.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/sound/usb/line6/midi.h b/sound/usb/line6/midi.h new file mode 100644 index 000000000..cf82d69e2 --- /dev/null +++ b/sound/usb/line6/midi.h @@ -0,0 +1,51 @@ +/* + * Line 6 Linux USB driver + * + * Copyright (C) 2004-2010 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 Line 6 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 MIDI buffer handling */ + spinlock_t lock; + + /* Wait queue for MIDI transmission */ + wait_queue_head_t send_wait; + + /* Buffer for incoming MIDI stream */ + struct midi_buffer midibuf_in; + + /* Buffer for outgoing MIDI stream */ + struct midi_buffer 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 |