include/aserver.h

   1 /*
   2  *  ALSA client/server header file
   3  *  Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
   4  *
   5  *   This library is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU Lesser General Public License as
   7  *   published by the Free Software Foundation; either version 2.1 of
   8  *   the License, or (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 Lesser General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU Lesser General Public
  16  *   License along with this library; if not, write to the Free Software
  17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  *
  19  */
  20
  21 #include <netdb.h>
  22 #include "../src/pcm/pcm_local.h"
  23 #include "../src/control/control_local.h"
  24
  25 int snd_receive_fd(int sock, void *data, size_t len, int *fd);
  26
  27 typedef enum _snd_dev_type {
  28         SND_DEV_TYPE_PCM,
  29         SND_DEV_TYPE_CONTROL,
  30         SND_DEV_TYPE_RAWMIDI,
  31         SND_DEV_TYPE_TIMER,
  32         SND_DEV_TYPE_HWDEP,
  33         SND_DEV_TYPE_SEQ,
  34 } snd_dev_type_t;
  35
  36 typedef enum _snd_transport_type {
  37         SND_TRANSPORT_TYPE_SHM,
  38         SND_TRANSPORT_TYPE_TCP,
  39 } snd_transport_type_t;
  40
  41 #define SND_PCM_IOCTL_HWSYNC            _IO ('A', 0x22)
  42 #define SND_PCM_IOCTL_STATE             _IO ('A', 0xf1)
  43 #define SND_PCM_IOCTL_MMAP              _IO ('A', 0xf2)
  44 #define SND_PCM_IOCTL_MUNMAP            _IO ('A', 0xf3)
  45 #define SND_PCM_IOCTL_MMAP_COMMIT       _IO ('A', 0xf4)
  46 #define SND_PCM_IOCTL_AVAIL_UPDATE      _IO ('A', 0xf5)
  47 #define SND_PCM_IOCTL_ASYNC             _IO ('A', 0xf6)
  48 #define SND_PCM_IOCTL_CLOSE             _IO ('A', 0xf7)
  49 #define SND_PCM_IOCTL_POLL_DESCRIPTOR   _IO ('A', 0xf8)
  50 #define SND_PCM_IOCTL_HW_PTR_FD         _IO ('A', 0xf9)
  51 #define SND_PCM_IOCTL_APPL_PTR_FD       _IO ('A', 0xfa)
  52 #define SND_PCM_IOCTL_FORWARD           _IO ('A', 0xfb)
  53
  54 typedef struct {
  55         snd_pcm_uframes_t ptr;
  56         int use_mmap;
  57         off_t offset;           /* for mmap */
  58         int changed;
  59 } snd_pcm_shm_rbptr_t;
  60
  61 typedef struct {
  62         long result;
  63         int cmd;
  64         snd_pcm_shm_rbptr_t hw;
  65         snd_pcm_shm_rbptr_t appl;
  66         union {
  67                 struct {
  68                         int sig;
  69                         pid_t pid;
  70                 } async;
  71                 snd_pcm_info_t info;
  72                 snd_pcm_hw_params_t hw_refine;
  73                 snd_pcm_hw_params_t hw_params;
  74                 snd_pcm_sw_params_t sw_params;
  75                 snd_pcm_status_t status;
  76                 struct {
  77                         snd_pcm_uframes_t frames;
  78                 } avail;
  79                 struct {
  80                         snd_pcm_sframes_t frames;
  81                 } delay;
  82                 struct {
  83                         int enable;
  84                 } pause;
  85                 snd_pcm_channel_info_t channel_info;
  86                 struct {
  87                         snd_pcm_uframes_t frames;
  88                 } rewind;
  89                 struct {
  90                         snd_pcm_uframes_t frames;
  91                 } forward;
  92                 struct {
  93                         int fd;
  94                 } link;
  95                 struct {
  96                         snd_pcm_uframes_t offset;
  97                         snd_pcm_uframes_t frames;
  98                 } mmap_commit;
  99                 struct {
 100                         char use_mmap;
 101                         int shmid;
 102                         off_t offset;
 103                 } rbptr;
 104         } u;
 105         char data[0];
 106 } snd_pcm_shm_ctrl_t;
 107
 108 #define PCM_SHM_SIZE sizeof(snd_pcm_shm_ctrl_t)
 109
 110 #define SND_CTL_IOCTL_READ              _IOR('U', 0xf1, snd_ctl_event_t)
 111 #define SND_CTL_IOCTL_CLOSE             _IO ('U', 0xf2)
 112 #define SND_CTL_IOCTL_POLL_DESCRIPTOR   _IO ('U', 0xf3)
 113 #define SND_CTL_IOCTL_ASYNC             _IO ('U', 0xf4)
 114
 115 typedef struct {
 116         int result;
 117         int cmd;
 118         union {
 119                 struct {
 120                         int sig;
 121                         pid_t pid;
 122                 } async;
 123                 int device;
 124                 int subscribe_events;
 125                 snd_ctl_card_info_t card_info;
 126                 snd_ctl_elem_list_t element_list;
 127                 snd_ctl_elem_info_t element_info;
 128                 snd_ctl_elem_value_t element_read;
 129                 snd_ctl_elem_value_t element_write;
 130                 snd_ctl_elem_id_t element_lock;
 131                 snd_ctl_elem_id_t element_unlock;
 132                 snd_hwdep_info_t hwdep_info;
 133                 snd_pcm_info_t pcm_info;
 134                 int pcm_prefer_subdevice;
 135                 snd_rawmidi_info_t rawmidi_info;
 136                 int rawmidi_prefer_subdevice;
 137                 unsigned int power_state;
 138                 snd_ctl_event_t read;
 139         } u;
 140         char data[0];
 141 } snd_ctl_shm_ctrl_t;
 142
 143 #define CTL_SHM_SIZE 65536
 144 #define CTL_SHM_DATA_MAXLEN (CTL_SHM_SIZE - offsetof(snd_ctl_shm_ctrl_t, data))
 145
 146 typedef struct {
 147         unsigned char dev_type;
 148         unsigned char transport_type;
 149         unsigned char stream;
 150         unsigned char mode;
 151         unsigned char namelen;
 152         char name[0];
 153 } snd_client_open_request_t;
 154
 155 typedef struct {
 156         long result;
 157         int cookie;
 158 } snd_client_open_answer_t;
 159