diff options
Diffstat (limited to 'sound/usb/line6/playback.h')
| -rw-r--r-- | sound/usb/line6/playback.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/sound/usb/line6/playback.h b/sound/usb/line6/playback.h new file mode 100644 index 000000000000..743bd6f74c57 --- /dev/null +++ b/sound/usb/line6/playback.h @@ -0,0 +1,41 @@ +/* + * Line6 Linux USB driver - 0.9.1beta + * + * 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 PLAYBACK_H +#define PLAYBACK_H + +#include <sound/pcm.h> + +#include "driver.h" + +/* + * When the TonePort is used with jack in full duplex mode and the outputs are + * not connected, the software monitor produces an ugly noise since everything + * written to the output buffer (i.e., the input signal) will be repeated in + * the next period (sounds like a delay effect). As a workaround, the output + * buffer is cleared after the data have been read, but there must be a better + * solution. Until one is found, this workaround can be used to fix the + * problem. + */ +#define USE_CLEAR_BUFFER_WORKAROUND 1 + +extern struct snd_pcm_ops snd_line6_playback_ops; + +extern int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm); +extern void line6_free_playback_buffer(struct snd_line6_pcm *line6pcm); +extern int line6_submit_audio_out_all_urbs(struct snd_line6_pcm *line6pcm); +extern void line6_unlink_audio_out_urbs(struct snd_line6_pcm *line6pcm); +extern void line6_unlink_wait_clear_audio_out_urbs(struct snd_line6_pcm + *line6pcm); +extern void line6_wait_clear_audio_out_urbs(struct snd_line6_pcm *line6pcm); +extern int snd_line6_playback_trigger(struct snd_line6_pcm *line6pcm, int cmd); + +#endif |