1 #ifndef __SOUND_PCM_OSS_H 2 #define __SOUND_PCM_OSS_H 3 4 /* 5 * Digital Audio (PCM) - OSS compatibility abstract layer 6 * Copyright (c) by Jaroslav Kysela <perex@suse.cz> 7 * 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 */ 24 25 struct snd_pcm_oss_setup { 26 char *task_name; 27 unsigned int disable:1, 28 direct:1, 29 block:1, 30 nonblock:1, 31 partialfrag:1, 32 nosilence:1, 33 buggyptr:1; 34 unsigned int periods; 35 unsigned int period_size; 36 struct snd_pcm_oss_setup *next; 37 }; 38 39 struct snd_pcm_oss_runtime { 40 unsigned params: 1, /* format/parameter change */ 41 prepare: 1, /* need to prepare the operation */ 42 trigger: 1, /* trigger flag */ 43 sync_trigger: 1; /* sync trigger flag */ 44 int rate; /* requested rate */ 45 int format; /* requested OSS format */ 46 unsigned int channels; /* requested channels */ 47 unsigned int fragshift; 48 unsigned int maxfrags; 49 unsigned int subdivision; /* requested subdivision */ 50 size_t period_bytes; /* requested period size */ 51 size_t period_frames; /* period frames for poll */ 52 size_t period_ptr; /* actual write pointer to period */ 53 unsigned int periods; 54 size_t buffer_bytes; /* requested buffer size */ 55 size_t bytes; /* total # bytes processed */ 56 size_t mmap_bytes; 57 char *buffer; /* vmallocated period */ 58 size_t buffer_used; /* used length from period buffer */ 59 struct snd_pcm_plugin *plugin_first; 60 struct snd_pcm_plugin *plugin_last; 61 unsigned int prev_hw_ptr_interrupt; 62 }; 63 64 struct snd_pcm_oss_file { 65 struct snd_pcm_substream *streams[2]; 66 }; 67 68 struct snd_pcm_oss_substream { 69 unsigned oss: 1; /* oss mode */ 70 struct snd_pcm_oss_setup *setup; /* active setup */ 71 struct snd_pcm_oss_file *file; 72 }; 73 74 struct snd_pcm_oss_stream { 75 struct snd_pcm_oss_setup *setup_list; /* setup list */ 76 struct semaphore setup_mutex; 77 struct snd_info_entry *proc_entry; 78 }; 79 80 struct snd_pcm_oss { 81 int reg; 82 unsigned int reg_mask; 83 }; 84 85 #endif /* __SOUND_PCM_OSS_H */ 86