linux/alsa/usx2y.h

   1 /*
   2     Copyright (C) 2001 Paul Davis
   3     Copyright (C) 2004 Karsten Wiese, Rui Nuno Capela
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19     $Id: usx2y.h 855 2004-12-28 05:50:18Z joq $
  20 */
  21
  22 #ifndef __jack_usx2y_h__
  23 #define __jack_usx2y_h__
  24
  25 #define USX2Y_MAXPACK           50
  26 #define USX2Y_MAXBUFFERMS       100
  27 #define USX2Y_MAXSTRIDE 3
  28
  29 #define USX2Y_SSS (((USX2Y_MAXPACK * USX2Y_MAXBUFFERMS * USX2Y_MAXSTRIDE + 4096) / 4096) * 4096)
  30
  31 struct snd_usX2Y_hwdep_pcm_shm
  32 {
  33     char playback[USX2Y_SSS];
  34     char capture0x8[USX2Y_SSS];
  35     char capture0xA[USX2Y_SSS];
  36     volatile int playback_iso_head;
  37     int playback_iso_start;
  38     struct
  39     {
  40         int     frame,
  41         offset,
  42         length;
  43     }
  44     captured_iso[128];
  45     volatile int captured_iso_head;
  46     volatile unsigned captured_iso_frames;
  47     int capture_iso_start;
  48 };
  49 typedef struct snd_usX2Y_hwdep_pcm_shm snd_usX2Y_hwdep_pcm_shm_t;
  50
  51 typedef struct
  52 {
  53     alsa_driver_t *driver;
  54     snd_hwdep_t *hwdep_handle;
  55     struct pollfd pfds;
  56     struct snd_usX2Y_hwdep_pcm_shm *hwdep_pcm_shm;
  57     int playback_iso_start;
  58     int playback_iso_bytes_done;
  59     int capture_iso_start;
  60     int capture_iso_bytes_done;
  61 }
  62 usx2y_t;
  63
  64 jack_hardware_t *
  65 jack_alsa_usx2y_hw_new (alsa_driver_t *driver);
  66
  67 #endif /* __jack_usx2y_h__*/