1 /*
2 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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 *
11 * FFmpeg is distributed in the hope that it will be useful,
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
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20 #include "avformat.h"
21 #include "avio_internal.h"
22 #include "internal.h"
23
24 #include "libavutil/internal.h"
25 #include "libavutil/opt.h"
26
27 /**
28 * @file
29 * Options definition for AVFormatContext.
30 */
31
32 FF_DISABLE_DEPRECATION_WARNINGS
33 #include "options_table.h"
34 FF_ENABLE_DEPRECATION_WARNINGS
35
format_to_name(void * ptr)36 static const char* format_to_name(void* ptr)
37 {
38 AVFormatContext* fc = (AVFormatContext*) ptr;
39 if(fc->iformat) return fc->iformat->name;
40 else if(fc->oformat) return fc->oformat->name;
41 else return "NULL";
42 }
43
format_child_next(void * obj,void * prev)44 static void *format_child_next(void *obj, void *prev)
45 {
46 AVFormatContext *s = obj;
47 if (!prev && s->priv_data &&
48 ((s->iformat && s->iformat->priv_class) ||
49 s->oformat && s->oformat->priv_class))
50 return s->priv_data;
51 if (s->pb && s->pb->av_class && prev != s->pb)
52 return s->pb;
53 return NULL;
54 }
55
format_child_class_next(const AVClass * prev)56 static const AVClass *format_child_class_next(const AVClass *prev)
57 {
58 AVInputFormat *ifmt = NULL;
59 AVOutputFormat *ofmt = NULL;
60
61 if (!prev)
62 return &ff_avio_class;
63
64 while ((ifmt = av_iformat_next(ifmt)))
65 if (ifmt->priv_class == prev)
66 break;
67
68 if (!ifmt)
69 while ((ofmt = av_oformat_next(ofmt)))
70 if (ofmt->priv_class == prev)
71 break;
72 if (!ofmt)
73 while (ifmt = av_iformat_next(ifmt))
74 if (ifmt->priv_class)
75 return ifmt->priv_class;
76
77 while (ofmt = av_oformat_next(ofmt))
78 if (ofmt->priv_class)
79 return ofmt->priv_class;
80
81 return NULL;
82 }
83
get_category(void * ptr)84 static AVClassCategory get_category(void *ptr)
85 {
86 AVFormatContext* s = ptr;
87 if(s->iformat) return AV_CLASS_CATEGORY_DEMUXER;
88 else return AV_CLASS_CATEGORY_MUXER;
89 }
90
91 static const AVClass av_format_context_class = {
92 .class_name = "AVFormatContext",
93 .item_name = format_to_name,
94 .option = avformat_options,
95 .version = LIBAVUTIL_VERSION_INT,
96 .child_next = format_child_next,
97 .child_class_next = format_child_class_next,
98 .category = AV_CLASS_CATEGORY_MUXER,
99 .get_category = get_category,
100 };
101
io_open_default(AVFormatContext * s,AVIOContext ** pb,const char * url,int flags,AVDictionary ** options)102 static int io_open_default(AVFormatContext *s, AVIOContext **pb,
103 const char *url, int flags, AVDictionary **options)
104 {
105 int loglevel;
106
107 if (!strcmp(url, s->url) ||
108 s->iformat && !strcmp(s->iformat->name, "image2") ||
109 s->oformat && !strcmp(s->oformat->name, "image2")
110 ) {
111 loglevel = AV_LOG_DEBUG;
112 } else
113 loglevel = AV_LOG_INFO;
114
115 av_log(s, loglevel, "Opening \'%s\' for %s\n", url, flags & AVIO_FLAG_WRITE ? "writing" : "reading");
116
117 #if FF_API_OLD_OPEN_CALLBACKS
118 FF_DISABLE_DEPRECATION_WARNINGS
119 if (s->open_cb)
120 return s->open_cb(s, pb, url, flags, &s->interrupt_callback, options);
121 FF_ENABLE_DEPRECATION_WARNINGS
122 #endif
123
124 return ffio_open_whitelist(pb, url, flags, &s->interrupt_callback, options, s->protocol_whitelist, s->protocol_blacklist);
125 }
126
io_close_default(AVFormatContext * s,AVIOContext * pb)127 static void io_close_default(AVFormatContext *s, AVIOContext *pb)
128 {
129 avio_close(pb);
130 }
131
avformat_get_context_defaults(AVFormatContext * s)132 static void avformat_get_context_defaults(AVFormatContext *s)
133 {
134 memset(s, 0, sizeof(AVFormatContext));
135
136 s->av_class = &av_format_context_class;
137
138 s->io_open = io_open_default;
139 s->io_close = io_close_default;
140
141 av_opt_set_defaults(s);
142 }
143
avformat_alloc_context(void)144 AVFormatContext *avformat_alloc_context(void)
145 {
146 AVFormatContext *ic;
147 AVFormatInternal *internal;
148 ic = av_malloc(sizeof(AVFormatContext));
149 if (!ic) return ic;
150
151 internal = av_mallocz(sizeof(*internal));
152 if (!internal) {
153 av_free(ic);
154 return NULL;
155 }
156 avformat_get_context_defaults(ic);
157 ic->internal = internal;
158 ic->internal->offset = AV_NOPTS_VALUE;
159 ic->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
160 ic->internal->shortest_end = AV_NOPTS_VALUE;
161
162 return ic;
163 }
164
av_fmt_ctx_get_duration_estimation_method(const AVFormatContext * ctx)165 enum AVDurationEstimationMethod av_fmt_ctx_get_duration_estimation_method(const AVFormatContext* ctx)
166 {
167 return ctx->duration_estimation_method;
168 }
169
avformat_get_class(void)170 const AVClass *avformat_get_class(void)
171 {
172 return &av_format_context_class;
173 }
174