usx2y.h

00001 /*
00002     Copyright (C) 2001 Paul Davis
00003     Copyright (C) 2004 Karsten Wiese, Rui Nuno Capela
00004     
00005     This program is free software; you can redistribute it and/or modify
00006     it under the terms of the GNU General Public License as published by
00007     the Free Software Foundation; either version 2 of the License, or
00008     (at your option) any later version.
00009 
00010     This program is distributed in the hope that it will be useful,
00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013     GNU General Public License for more details.
00014 
00015     You should have received a copy of the GNU General Public License
00016     along with this program; if not, write to the Free Software
00017     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00018 
00019     $Id: usx2y.h 855 2004-12-28 05:50:18Z joq $
00020 */
00021 
00022 #ifndef __jack_usx2y_h__
00023 #define __jack_usx2y_h__
00024 
00025 #define USX2Y_MAXPACK           50
00026 #define USX2Y_MAXBUFFERMS       100
00027 #define USX2Y_MAXSTRIDE 3
00028 
00029 #define USX2Y_SSS (((USX2Y_MAXPACK * USX2Y_MAXBUFFERMS * USX2Y_MAXSTRIDE + 4096) / 4096) * 4096)
00030 
00031 struct snd_usX2Y_hwdep_pcm_shm {
00032         char playback[USX2Y_SSS];
00033         char capture0x8[USX2Y_SSS];
00034         char capture0xA[USX2Y_SSS];
00035         volatile int playback_iso_head;
00036         int playback_iso_start;
00037         struct {
00038                 int     frame,
00039                         offset,
00040                         length;
00041         } captured_iso[128];
00042         volatile int captured_iso_head;
00043         volatile unsigned captured_iso_frames;
00044         int capture_iso_start;
00045 };
00046 typedef struct snd_usX2Y_hwdep_pcm_shm snd_usX2Y_hwdep_pcm_shm_t;
00047 
00048 typedef struct {
00049         alsa_driver_t *driver;
00050         snd_hwdep_t *hwdep_handle;
00051         struct pollfd pfds;
00052         struct snd_usX2Y_hwdep_pcm_shm *hwdep_pcm_shm;
00053         int playback_iso_start;
00054         int playback_iso_bytes_done;
00055         int capture_iso_start;
00056         int capture_iso_bytes_done;
00057 } usx2y_t;
00058 
00059 jack_hardware_t *
00060 jack_alsa_usx2y_hw_new (alsa_driver_t *driver);
00061 
00062 #endif /* __jack_usx2y_h__*/

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