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https://github.com/mpv-player/mpv
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fb5273985c
In the previous change, I added the uuid files. In this change, we check the libavutil version and if it's too old, we compile in our local copy. We have to change the include paths of the uuid code to find some other libavutil headers, but nothing beyond that.
142 lines
4.2 KiB
C
142 lines
4.2 KiB
C
/*
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* Copyright (c) 2022 Pierre-Anthony Lemieux <pal@palemieux.com>
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* Zane van Iperen <zane@zanevaniperen.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* Copyright (C) 1996, 1997 Theodore Ts'o.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, and the entire permission notice in its entirety,
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* including the disclaimer of warranties.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
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* WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*/
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/**
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* @file
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* UUID parsing and serialization utilities.
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* The library treat the UUID as an opaque sequence of 16 unsigned bytes,
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* i.e. ignoring the internal layout of the UUID, which depends on the type
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* of the UUID.
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*
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* @author Pierre-Anthony Lemieux <pal@palemieux.com>
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* @author Zane van Iperen <zane@zanevaniperen.com>
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*/
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#include "uuid.h"
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#include "libavutil/error.h"
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#include "libavutil/avstring.h"
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int av_uuid_parse(const char *in, AVUUID uu)
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{
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if (strlen(in) != 36)
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return AVERROR(EINVAL);
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return av_uuid_parse_range(in, in + 36, uu);
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}
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static int xdigit_to_int(char c)
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{
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c = av_tolower(c);
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if (c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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if (c >= '0' && c <= '9')
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return c - '0';
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return -1;
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}
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int av_uuid_parse_range(const char *in_start, const char *in_end, AVUUID uu)
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{
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int i;
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const char *cp;
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if ((in_end - in_start) != 36)
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return AVERROR(EINVAL);
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for (i = 0, cp = in_start; i < 16; i++) {
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int hi;
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int lo;
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if (i == 4 || i == 6 || i == 8 || i == 10)
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cp++;
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hi = xdigit_to_int(*cp++);
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lo = xdigit_to_int(*cp++);
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if (hi == -1 || lo == -1)
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return AVERROR(EINVAL);
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uu[i] = (hi << 4) + lo;
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}
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return 0;
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}
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static const char hexdigits_lower[16] = "0123456789abcdef";
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void av_uuid_unparse(const AVUUID uuid, char *out)
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{
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char *p = out;
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for (int i = 0; i < 16; i++) {
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uint8_t tmp;
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if (i == 4 || i == 6 || i == 8 || i == 10)
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*p++ = '-';
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tmp = uuid[i];
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*p++ = hexdigits_lower[tmp >> 4];
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*p++ = hexdigits_lower[tmp & 15];
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}
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*p = '\0';
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}
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int av_uuid_urn_parse(const char *in, AVUUID uu)
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{
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if (av_stristr(in, "urn:uuid:") != in)
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return AVERROR(EINVAL);
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return av_uuid_parse(in + 9, uu);
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}
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