| /* |
| * 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 |
