linux-stable/sound/usb/line6/playback.h
Bhumika Goyal e195a331c4 ALSA: line6: make snd_pcm_ops const
Make these const as they are only passed to a const argument of the
function snd_pcm_set_ops in the file referencing them. Also, add const
to the declaration in the headers.

Structures found using Coccinelle and changes done by hand.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-10-02 14:33:23 +02:00

35 lines
1.1 KiB
C

/*
* 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 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 const struct snd_pcm_ops snd_line6_playback_ops;
extern int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm);
extern int line6_submit_audio_out_all_urbs(struct snd_line6_pcm *line6pcm);
#endif