1 /* 2 * Line 6 Linux USB driver 3 * 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 * 10 */ 11 12 #ifndef PLAYBACK_H 13 #define PLAYBACK_H 14 15 #include <sound/pcm.h> 16 17 #include "driver.h" 18 19 /* 20 * When the TonePort is used with jack in full duplex mode and the outputs are 21 * not connected, the software monitor produces an ugly noise since everything 22 * written to the output buffer (i.e., the input signal) will be repeated in 23 * the next period (sounds like a delay effect). As a workaround, the output 24 * buffer is cleared after the data have been read, but there must be a better 25 * solution. Until one is found, this workaround can be used to fix the 26 * problem. 27 */ 28 #define USE_CLEAR_BUFFER_WORKAROUND 1 29 30 extern const struct snd_pcm_ops snd_line6_playback_ops; 31 32 extern int line6_create_audio_out_urbs(struct snd_line6_pcm *line6pcm); 33 extern int line6_submit_audio_out_all_urbs(struct snd_line6_pcm *line6pcm); 34 35 #endif 36