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/* $OpenBSD: sock.h,v 1.18 2010/10/21 18:57:42 ratchov Exp $ */
/*
* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef SOCK_H
#define SOCK_H
#include "amsg.h"
#include "aparams.h"
#include "pipe.h"
struct opt;
struct sock {
struct pipe pipe;
/*
* Socket and protocol specific stuff, mainly used
* to decode/encode messages in the stream.
*/
struct amsg rmsg, wmsg; /* messages being sent/received */
unsigned wmax; /* max frames we're allowed to write */
unsigned rmax; /* max frames we're allowed to read */
unsigned rtodo; /* input bytes not read yet */
unsigned wtodo; /* output bytes not written yet */
#define SOCK_RDATA 0 /* data chunk being read */
#define SOCK_RMSG 1 /* amsg query being processed */
#define SOCK_RRET 2 /* amsg reply being returned */
unsigned rstate; /* state of the read-end FSM */
#define SOCK_WIDLE 0 /* nothing to do */
#define SOCK_WMSG 1 /* amsg being written */
#define SOCK_WDATA 2 /* data chunk being written */
unsigned wstate; /* state of the write-end FSM */
#define SOCK_HELLO 0 /* waiting for HELLO message */
#define SOCK_INIT 1 /* parameter negotiation */
#define SOCK_START 2 /* filling play buffers */
#define SOCK_READY 3 /* play buffers full */
#define SOCK_RUN 4 /* attached to the mix / sub */
#define SOCK_STOP 5 /* draining rec buffers */
#define SOCK_MIDI 6 /* raw byte stream (midi) */
unsigned pstate; /* one of the above */
unsigned mode; /* bitmask of MODE_XXX */
struct aparams rpar; /* read (ie play) parameters */
struct aparams wpar; /* write (ie rec) parameters */
int delta; /* pos. change to send */
int startpos; /* initial pos. to send */
int tickpending; /* delta waiting to be transmitted */
int startpending; /* initial delta waiting to be transmitted */
unsigned walign; /* align data packets to this */
unsigned bufsz; /* total buffer size */
unsigned round; /* block size */
unsigned xrun; /* one of AMSG_IGNORE, ... */
int vol; /* requested volume */
int lastvol; /* last volume */
int slot; /* mixer ctl slot number */
struct opt *opt; /* "subdevice" definition */
struct dev *dev; /* actual hardware device */
char who[12]; /* label, mostly for debugging */
};
struct sock *sock_new(struct fileops *, int fd);
extern struct fileops sock_ops;
#endif /* !defined(SOCK_H) */
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