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 typedef struct _snd_pcm_plugin snd_pcm_plugin_t; 26 typedef struct _snd_pcm_oss_setup snd_pcm_oss_setup_t; 27 28 struct _snd_pcm_oss_setup { 29 char *task_name; 30 unsigned int disable:1, 31 direct:1, 32 block:1, 33 nonblock:1, 34 partialfrag:1, 35 nosilence:1; 36 unsigned int periods; 37 unsigned int period_size; 38 snd_pcm_oss_setup_t *next; 39 }; 40 41 typedef struct _snd_pcm_oss_runtime { 42 unsigned params: 1, /* format/parameter change */ 43 prepare: 1, /* need to prepare the operation */ 44 trigger: 1, /* trigger flag */ 45 sync_trigger: 1; /* sync trigger flag */ 46 int rate; /* requested rate */ 47 int format; /* requested OSS format */ 48 unsigned int channels; /* requested channels */ 49 unsigned int fragshift; 50 unsigned int maxfrags; 51 unsigned int subdivision; /* requested subdivision */ 52 size_t period_bytes; /* requested period size */ 53 size_t period_frames; /* period frames for poll */ 54 size_t period_ptr; /* actual write pointer to period */ 55 unsigned int periods; 56 size_t buffer_bytes; /* requested buffer size */ 57 size_t bytes; /* total # bytes processed */ 58 size_t mmap_bytes; 59 char *buffer; /* vmallocated period */ 60 size_t buffer_used; /* used length from period buffer */ 61 snd_pcm_plugin_t *plugin_first; 62 snd_pcm_plugin_t *plugin_last; 63 unsigned int prev_hw_ptr_interrupt; 64 } snd_pcm_oss_runtime_t; 65 66 typedef struct _snd_pcm_oss_file { 67 snd_pcm_substream_t *streams[2]; 68 } snd_pcm_oss_file_t; 69 70 typedef struct _snd_pcm_oss_substream { 71 unsigned oss: 1; /* oss mode */ 72 snd_pcm_oss_setup_t *setup; /* active setup */ 73 snd_pcm_oss_file_t *file; 74 } snd_pcm_oss_substream_t; 75 76 typedef struct _snd_pcm_oss_stream { 77 snd_pcm_oss_setup_t *setup_list; /* setup list */ 78 struct semaphore setup_mutex; 79 snd_info_entry_t *proc_entry; 80 } snd_pcm_oss_stream_t; 81 82 typedef struct _snd_pcm_oss { 83 int reg; 84 unsigned int reg_mask; 85 } snd_pcm_oss_t; 86 87 #endif /* __SOUND_PCM_OSS_H */ 88