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- /*
- * 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
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