1 /* SPDX-License-Identifier: GPL-2.0-only */ <<
2 /* 1 /*
3 * Line 6 Linux USB driver 2 * Line 6 Linux USB driver
4 * 3 *
5 * Copyright (C) 2004-2010 Markus Grabner (lin !! 4 * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
>> 5 *
>> 6 * This program is free software; you can redistribute it and/or
>> 7 * modify it under the terms of the GNU General Public License as
>> 8 * published by the Free Software Foundation, version 2.
>> 9 *
6 */ 10 */
7 11
8 #ifndef PLAYBACK_H 12 #ifndef PLAYBACK_H
9 #define PLAYBACK_H 13 #define PLAYBACK_H
10 14
11 #include <sound/pcm.h> 15 #include <sound/pcm.h>
12 16
13 #include "driver.h" 17 #include "driver.h"
14 18
15 /* 19 /*
16 * When the TonePort is used with jack in full 20 * When the TonePort is used with jack in full duplex mode and the outputs are
17 * not connected, the software monitor produce 21 * not connected, the software monitor produces an ugly noise since everything
18 * written to the output buffer (i.e., the inp 22 * written to the output buffer (i.e., the input signal) will be repeated in
19 * the next period (sounds like a delay effect 23 * the next period (sounds like a delay effect). As a workaround, the output
20 * buffer is cleared after the data have been 24 * buffer is cleared after the data have been read, but there must be a better
21 * solution. Until one is found, this workarou 25 * solution. Until one is found, this workaround can be used to fix the
22 * problem. 26 * problem.
23 */ 27 */
24 #define USE_CLEAR_BUFFER_WORKAROUND 1 28 #define USE_CLEAR_BUFFER_WORKAROUND 1
25 29
26 extern const struct snd_pcm_ops snd_line6_play !! 30 extern struct snd_pcm_ops snd_line6_playback_ops;
27 31
28 extern int line6_create_audio_out_urbs(struct 32 extern int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm);
29 extern int line6_submit_audio_out_all_urbs(str 33 extern int line6_submit_audio_out_all_urbs(struct snd_line6_pcm *line6pcm);
30 34
31 #endif 35 #endif
32 36
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