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Diffstat (limited to 'usr.bin/aucat/amsg.h')
| -rw-r--r-- | usr.bin/aucat/amsg.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/usr.bin/aucat/amsg.h b/usr.bin/aucat/amsg.h new file mode 100644 index 00000000000..510d45ad1ea --- /dev/null +++ b/usr.bin/aucat/amsg.h @@ -0,0 +1,92 @@ +/* $OpenBSD: amsg.h,v 1.1 2008/10/26 08:49:43 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 SOCKET_H +#define SOCKET_H + +#include <stdint.h> + +/* + * WARNING: since the protocol may be simultaneously used by static + * binaries or by different versions of a shared library, we are not + * allowed to change the packet binary representation in a backward + * incompatible way. + */ +struct amsg { +#define AMSG_ACK 0 /* ack for START/STOP */ +#define AMSG_GETPAR 1 /* get the current parameters */ +#define AMSG_SETPAR 2 /* set the current parameters */ +#define AMSG_START 3 /* request the server to start the stream */ +#define AMSG_STOP 4 /* request the server to stop the stream */ +#define AMSG_DATA 5 /* data block */ +#define AMSG_MOVE 6 /* position changed */ +#define AMSG_GETCAP 7 /* get capabilities */ + uint32_t cmd; + uint32_t __pad; + union { + struct amsg_par { +#define AMSG_PLAY 1 /* will play */ +#define AMSG_REC 2 /* will record */ + uint8_t mode; /* a bitmap of above */ +#define AMSG_IGNORE 0 /* loose sync */ +#define AMSG_SYNC 1 /* resync after xrun */ +#define AMSG_ERROR 2 /* kill the stream */ + uint8_t xrun; /* one of above */ + uint8_t bps; /* bytes per sample */ + uint8_t bits; /* actually used bits */ + uint8_t msb; /* 1 if MSB justified */ + uint8_t le; /* 1 if little endian */ + uint8_t sig; /* 1 if signed */ + uint8_t __pad1; + uint16_t pchan; /* play channels */ + uint16_t rchan; /* record channels */ + uint32_t rate; /* frames per second */ + uint32_t bufsz; /* buffered frames */ + uint32_t round; + uint32_t _reserved[2]; /* for future use */ + } par; + struct amsg_cap { + uint32_t rate; /* native rate */ + uint32_t rate_div; /* divisor of emul. rates */ + uint16_t rchan; /* native rec channels */ + uint16_t pchan; /* native play channels */ + uint8_t bits; /* native bits per sample */ + uint8_t bps; /* native ytes per sample */ + uint8_t _reserved[10]; /* for future use */ + } cap; + struct amsg_data { +#define AMSG_DATAMAX 0x1000 + uint32_t size; + } data; + struct amsg_ts { + int32_t delta; + } ts; + } u; +}; + +/* + * initialize an amsg structure: fill all fields with 0xff, so the read + * can test which fields were set + */ +#define AMSG_INIT(m) do { memset((m), 0xff, sizeof(struct amsg)); } while (0) + +/* + * since the structure is memset to 0xff, the MSB can be used to check + * if any filed was set + */ +#define AMSG_ISSET(x) (((x) & (1 << (8 * sizeof(x) - 1))) == 0) + +#endif /* !defined(SOCKET_H) */ |