2 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 * This file is part of FFmpeg.
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.
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.
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
21 #include "avio_internal.h"
22 #include "libavutil/opt.h"
26 * Options definition for AVFormatContext.
29 #include "options_table.h"
31 static const char* format_to_name(void* ptr)
33 AVFormatContext* fc = (AVFormatContext*) ptr;
34 if(fc->iformat) return fc->iformat->name;
35 else if(fc->oformat) return fc->oformat->name;
39 static void *format_child_next(void *obj, void *prev)
41 AVFormatContext *s = obj;
42 if (!prev && s->priv_data &&
43 ((s->iformat && s->iformat->priv_class) ||
44 s->oformat && s->oformat->priv_class))
46 if (s->pb && s->pb->av_class && prev != s->pb)
51 static const AVClass *format_child_class_next(const AVClass *prev)
53 AVInputFormat *ifmt = NULL;
54 AVOutputFormat *ofmt = NULL;
57 return &ffio_url_class;
59 while ((ifmt = av_iformat_next(ifmt)))
60 if (ifmt->priv_class == prev)
64 while ((ofmt = av_oformat_next(ofmt)))
65 if (ofmt->priv_class == prev)
68 while (ifmt = av_iformat_next(ifmt))
70 return ifmt->priv_class;
72 while (ofmt = av_oformat_next(ofmt))
74 return ofmt->priv_class;
79 static AVClassCategory get_category(void *ptr)
81 AVFormatContext* s = ptr;
82 if(s->iformat) return AV_CLASS_CATEGORY_DEMUXER;
83 else return AV_CLASS_CATEGORY_MUXER;
86 static const AVClass av_format_context_class = {
87 .class_name = "AVFormatContext",
88 .item_name = format_to_name,
89 .option = avformat_options,
90 .version = LIBAVUTIL_VERSION_INT,
91 .child_next = format_child_next,
92 .child_class_next = format_child_class_next,
93 .category = AV_CLASS_CATEGORY_MUXER,
94 .get_category = get_category,
97 static void avformat_get_context_defaults(AVFormatContext *s)
99 memset(s, 0, sizeof(AVFormatContext));
101 s->av_class = &av_format_context_class;
103 av_opt_set_defaults(s);
106 AVFormatContext *avformat_alloc_context(void)
109 ic = av_malloc(sizeof(AVFormatContext));
111 avformat_get_context_defaults(ic);
115 enum AVDurationEstimationMethod av_fmt_ctx_get_duration_estimation_method(const AVFormatContext* ctx)
117 return ctx->duration_estimation_method;
120 const AVClass *avformat_get_class(void)
122 return &av_format_context_class;