You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
146 lines
4.8 KiB
146 lines
4.8 KiB
/*
|
|
* Copyright (c) 2022 Pierre-Anthony Lemieux <pal@palemieux.com>
|
|
* Zane van Iperen <zane@zanevaniperen.com>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* UUID parsing and serialization utilities.
|
|
* The library treats the UUID as an opaque sequence of 16 unsigned bytes,
|
|
* i.e. ignoring the internal layout of the UUID, which depends on the type
|
|
* of the UUID.
|
|
*
|
|
* @author Pierre-Anthony Lemieux <pal@palemieux.com>
|
|
* @author Zane van Iperen <zane@zanevaniperen.com>
|
|
*/
|
|
|
|
#ifndef AVUTIL_UUID_H
|
|
#define AVUTIL_UUID_H
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#define AV_PRI_UUID \
|
|
"%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-" \
|
|
"%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
|
|
|
|
#define AV_PRI_URN_UUID \
|
|
"urn:uuid:%02hhx%02hhx%02hhx%02hhx-%02hhx%02hhx-" \
|
|
"%02hhx%02hhx-%02hhx%02hhx-%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
|
|
|
|
/* AV_UUID_ARG() is used together with AV_PRI_UUID() or AV_PRI_URN_UUID
|
|
* to print UUIDs, e.g.
|
|
* av_log(NULL, AV_LOG_DEBUG, "UUID: " AV_PRI_UUID, AV_UUID_ARG(uuid));
|
|
*/
|
|
#define AV_UUID_ARG(x) \
|
|
(x)[ 0], (x)[ 1], (x)[ 2], (x)[ 3], \
|
|
(x)[ 4], (x)[ 5], (x)[ 6], (x)[ 7], \
|
|
(x)[ 8], (x)[ 9], (x)[10], (x)[11], \
|
|
(x)[12], (x)[13], (x)[14], (x)[15]
|
|
|
|
#define AV_UUID_LEN 16
|
|
|
|
/* Binary representation of a UUID */
|
|
typedef uint8_t AVUUID[AV_UUID_LEN];
|
|
|
|
/**
|
|
* Parses a string representation of a UUID formatted according to IETF RFC 4122
|
|
* into an AVUUID. The parsing is case-insensitive. The string must be 37
|
|
* characters long, including the terminating NUL character.
|
|
*
|
|
* Example string representation: "2fceebd0-7017-433d-bafb-d073a7116696"
|
|
*
|
|
* @param[in] in String representation of a UUID,
|
|
* e.g. 2fceebd0-7017-433d-bafb-d073a7116696
|
|
* @param[out] uu AVUUID
|
|
* @return A non-zero value in case of an error.
|
|
*/
|
|
int av_uuid_parse(const char *in, AVUUID uu);
|
|
|
|
/**
|
|
* Parses a URN representation of a UUID, as specified at IETF RFC 4122,
|
|
* into an AVUUID. The parsing is case-insensitive. The string must be 46
|
|
* characters long, including the terminating NUL character.
|
|
*
|
|
* Example string representation: "urn:uuid:2fceebd0-7017-433d-bafb-d073a7116696"
|
|
*
|
|
* @param[in] in URN UUID
|
|
* @param[out] uu AVUUID
|
|
* @return A non-zero value in case of an error.
|
|
*/
|
|
int av_uuid_urn_parse(const char *in, AVUUID uu);
|
|
|
|
/**
|
|
* Parses a string representation of a UUID formatted according to IETF RFC 4122
|
|
* into an AVUUID. The parsing is case-insensitive.
|
|
*
|
|
* @param[in] in_start Pointer to the first character of the string representation
|
|
* @param[in] in_end Pointer to the character after the last character of the
|
|
* string representation. That memory location is never
|
|
* accessed. It is an error if `in_end - in_start != 36`.
|
|
* @param[out] uu AVUUID
|
|
* @return A non-zero value in case of an error.
|
|
*/
|
|
int av_uuid_parse_range(const char *in_start, const char *in_end, AVUUID uu);
|
|
|
|
/**
|
|
* Serializes a AVUUID into a string representation according to IETF RFC 4122.
|
|
* The string is lowercase and always 37 characters long, including the
|
|
* terminating NUL character.
|
|
*
|
|
* @param[in] uu AVUUID
|
|
* @param[out] out Pointer to an array of no less than 37 characters.
|
|
*/
|
|
void av_uuid_unparse(const AVUUID uu, char *out);
|
|
|
|
/**
|
|
* Compares two UUIDs for equality.
|
|
*
|
|
* @param[in] uu1 AVUUID
|
|
* @param[in] uu2 AVUUID
|
|
* @return Nonzero if uu1 and uu2 are identical, 0 otherwise
|
|
*/
|
|
static inline int av_uuid_equal(const AVUUID uu1, const AVUUID uu2)
|
|
{
|
|
return memcmp(uu1, uu2, AV_UUID_LEN) == 0;
|
|
}
|
|
|
|
/**
|
|
* Copies the bytes of src into dest.
|
|
*
|
|
* @param[out] dest AVUUID
|
|
* @param[in] src AVUUID
|
|
*/
|
|
static inline void av_uuid_copy(AVUUID dest, const AVUUID src)
|
|
{
|
|
memcpy(dest, src, AV_UUID_LEN);
|
|
}
|
|
|
|
/**
|
|
* Sets a UUID to the nil UUID, i.e. a UUID with have all
|
|
* its 128 bits set to zero.
|
|
*
|
|
* @param[in,out] uu UUID to be set to the nil UUID
|
|
*/
|
|
static inline void av_uuid_nil(AVUUID uu)
|
|
{
|
|
memset(uu, 0, AV_UUID_LEN);
|
|
}
|
|
|
|
#endif /* AVUTIL_UUID_H */
|
|
|