aarch64: Add assembly support for -fsanitize=hwaddress tagged globals.
[libav.git] / libavformat / options.c
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1/*
2 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
3 *
2912e87a 4 * This file is part of Libav.
708ec8fb 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
2912e87a 11 * Libav is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
2912e87a 17 * License along with Libav; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20#include "avformat.h"
32caa7b1 21#include "avio_internal.h"
33c859c1 22#include "internal.h"
ec4c4839 23#include "url.h"
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24
25#include "libavutil/internal.h"
6ed04040 26#include "libavutil/opt.h"
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27
28/**
ba87f080 29 * @file
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30 * Options definition for AVFormatContext.
31 */
32
f046c3b5 33FF_DISABLE_DEPRECATION_WARNINGS
56266971 34#include "options_table.h"
f046c3b5 35FF_ENABLE_DEPRECATION_WARNINGS
56266971 36
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37static const char* format_to_name(void* ptr)
38{
39 AVFormatContext* fc = (AVFormatContext*) ptr;
40 if(fc->iformat) return fc->iformat->name;
41 else if(fc->oformat) return fc->oformat->name;
42 else return "NULL";
43}
44
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45static void *format_child_next(void *obj, void *prev)
46{
47 AVFormatContext *s = obj;
48 if (!prev && s->priv_data &&
49 ((s->iformat && s->iformat->priv_class) ||
50 s->oformat && s->oformat->priv_class))
51 return s->priv_data;
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52 if (s->pb && s->pb->av_class && prev != s->pb)
53 return s->pb;
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54 return NULL;
55}
56
57static const AVClass *format_child_class_next(const AVClass *prev)
05e84c95 58{
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59 AVInputFormat *ifmt = NULL;
60 AVOutputFormat *ofmt = NULL;
641c7afe 61
caf27e37 62 if (!prev)
c86d8aed 63 return &ff_avio_class;
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64
65 while ((ifmt = av_iformat_next(ifmt)))
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66 if (ifmt->priv_class == prev)
67 break;
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68
69 if (!ifmt)
70 while ((ofmt = av_oformat_next(ofmt)))
71 if (ofmt->priv_class == prev)
72 break;
73 if (!ofmt)
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74 while (ifmt = av_iformat_next(ifmt))
75 if (ifmt->priv_class)
76 return ifmt->priv_class;
77
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78 while (ofmt = av_oformat_next(ofmt))
79 if (ofmt->priv_class)
80 return ofmt->priv_class;
641c7afe 81
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82 return NULL;
83}
84
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85static const AVClass av_format_context_class = {
86 .class_name = "AVFormatContext",
87 .item_name = format_to_name,
b5a13865 88 .option = avformat_options,
f0029cbc 89 .version = LIBAVUTIL_VERSION_INT,
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90 .child_next = format_child_next,
91 .child_class_next = format_child_class_next,
f0029cbc 92};
708ec8fb 93
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94static int io_open_default(AVFormatContext *s, AVIOContext **pb,
95 const char *url, int flags, AVDictionary **options)
96{
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97 AVDictionary *opts_local = NULL;
98 int ret;
99
100 if (!options)
101 options = &opts_local;
102
103 if (s->protocol_whitelist) {
104 ret = av_dict_set(options, "protocol_whitelist", s->protocol_whitelist, 0);
105 if (ret < 0)
106 goto finish;
107 }
108 if (s->protocol_blacklist) {
109 ret = av_dict_set(options, "protocol_blacklist", s->protocol_blacklist, 0);
110 if (ret < 0)
111 goto finish;
112 }
113 ret = avio_open2(pb, url, flags, &s->interrupt_callback, options);
114finish:
115 av_dict_free(&opts_local);
116 return ret;
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117}
118
119static void io_close_default(AVFormatContext *s, AVIOContext *pb)
120{
121 avio_close(pb);
122}
123
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124static void avformat_get_context_defaults(AVFormatContext *s)
125{
126 memset(s, 0, sizeof(AVFormatContext));
127
128 s->av_class = &av_format_context_class;
129
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130 s->io_open = io_open_default;
131 s->io_close = io_close_default;
132
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133 av_opt_set_defaults(s);
134}
135
88a28965 136AVFormatContext *avformat_alloc_context(void)
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137{
138 AVFormatContext *ic;
139 ic = av_malloc(sizeof(AVFormatContext));
140 if (!ic) return ic;
141 avformat_get_context_defaults(ic);
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142
143 ic->internal = av_mallocz(sizeof(*ic->internal));
144 if (!ic->internal) {
145 avformat_free_context(ic);
146 return NULL;
147 }
9deaec78 148 ic->internal->offset = AV_NOPTS_VALUE;
33c859c1 149
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150 return ic;
151}
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152
153const AVClass *avformat_get_class(void)
154{
155 return &av_format_context_class;
156}