mirror of https://github.com/ericonr/sndio.git
76 lines
3.0 KiB
C
76 lines
3.0 KiB
C
/* $OpenBSD: sock.h,v 1.17 2010/06/05 12:45:48 ratchov Exp $ */
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/*
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* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef SOCK_H
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#define SOCK_H
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#include "amsg.h"
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#include "aparams.h"
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#include "pipe.h"
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struct opt;
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struct sock {
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struct pipe pipe;
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/*
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* Socket and protocol specific stuff, mainly used
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* to decode/encode messages in the stream.
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*/
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struct amsg rmsg, wmsg; /* messages being sent/received */
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unsigned wmax; /* max frames we're allowed to write */
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unsigned rmax; /* max frames we're allowed to read */
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unsigned rtodo; /* input bytes not read yet */
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unsigned wtodo; /* output bytes not written yet */
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#define SOCK_RDATA 0 /* data chunk being read */
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#define SOCK_RMSG 1 /* amsg query being processed */
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#define SOCK_RRET 2 /* amsg reply being returned */
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unsigned rstate; /* state of the read-end FSM */
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#define SOCK_WIDLE 0 /* nothing to do */
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#define SOCK_WMSG 1 /* amsg being written */
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#define SOCK_WDATA 2 /* data chunk being written */
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unsigned wstate; /* state of the write-end FSM */
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#define SOCK_HELLO 0 /* waiting for HELLO message */
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#define SOCK_INIT 1 /* parameter negotiation */
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#define SOCK_START 2 /* filling play buffers */
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#define SOCK_READY 3 /* play buffers full */
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#define SOCK_RUN 4 /* attached to the mix / sub */
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#define SOCK_STOP 5 /* draining rec buffers */
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#define SOCK_MIDI 6 /* raw byte stream (midi) */
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unsigned pstate; /* one of the above */
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unsigned mode; /* a set of AMSG_PLAY, AMSG_REC */
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struct aparams rpar; /* read (ie play) parameters */
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struct aparams wpar; /* write (ie rec) parameters */
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int delta; /* pos. change to send */
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int startpos; /* initial pos. to send */
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int tickpending; /* delta waiting to be transmitted */
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int startpending; /* initial delta waiting to be transmitted */
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unsigned walign; /* align data packets to this */
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unsigned bufsz; /* total buffer size */
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unsigned round; /* block size */
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unsigned xrun; /* one of AMSG_IGNORE, ... */
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int vol; /* requested volume */
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int lastvol; /* last volume */
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int slot; /* mixer ctl slot number */
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struct opt *opt; /* "subdevice" definition */
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struct dev *dev; /* actual hardware device */
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char who[12]; /* label, mostly for debugging */
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};
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struct sock *sock_new(struct fileops *, int fd);
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extern struct fileops sock_ops;
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#endif /* !defined(SOCK_H) */
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