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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Line 6 Linux USB driver4 *5 * Copyright (C) 2004-2010 Markus Grabner (line6@grabner-graz.at)6 */7 8#ifndef PLAYBACK_H9#define PLAYBACK_H10 11#include <sound/pcm.h>12 13#include "driver.h"14 15/*16 * When the TonePort is used with jack in full duplex mode and the outputs are17 * not connected, the software monitor produces an ugly noise since everything18 * written to the output buffer (i.e., the input signal) will be repeated in19 * the next period (sounds like a delay effect). As a workaround, the output20 * buffer is cleared after the data have been read, but there must be a better21 * solution. Until one is found, this workaround can be used to fix the22 * problem.23 */24#define USE_CLEAR_BUFFER_WORKAROUND 125 26extern const struct snd_pcm_ops snd_line6_playback_ops;27 28extern int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm);29extern int line6_submit_audio_out_all_urbs(struct snd_line6_pcm *line6pcm);30 31#endif32