mirror of
https://github.com/FFmpeg/FFmpeg.git
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123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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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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#include "avformat.h"
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#include "avio_internal.h"
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#include "libavutil/opt.h"
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/**
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* @file
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* Options definition for AVFormatContext.
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*/
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#include "options_table.h"
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static const char* format_to_name(void* ptr)
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{
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AVFormatContext* fc = (AVFormatContext*) ptr;
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if(fc->iformat) return fc->iformat->name;
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else if(fc->oformat) return fc->oformat->name;
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else return "NULL";
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}
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static void *format_child_next(void *obj, void *prev)
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{
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AVFormatContext *s = obj;
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if (!prev && s->priv_data &&
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((s->iformat && s->iformat->priv_class) ||
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s->oformat && s->oformat->priv_class))
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return s->priv_data;
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if (s->pb && s->pb->av_class && prev != s->pb)
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return s->pb;
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return NULL;
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}
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static const AVClass *format_child_class_next(const AVClass *prev)
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{
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AVInputFormat *ifmt = NULL;
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AVOutputFormat *ofmt = NULL;
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if (!prev)
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return &ffio_url_class;
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while ((ifmt = av_iformat_next(ifmt)))
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if (ifmt->priv_class == prev)
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break;
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if (!ifmt)
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while ((ofmt = av_oformat_next(ofmt)))
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if (ofmt->priv_class == prev)
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break;
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if (!ofmt)
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while (ifmt = av_iformat_next(ifmt))
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if (ifmt->priv_class)
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return ifmt->priv_class;
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while (ofmt = av_oformat_next(ofmt))
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if (ofmt->priv_class)
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return ofmt->priv_class;
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return NULL;
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}
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static AVClassCategory get_category(AVFormatContext *s)
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{
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if(s->iformat) return AV_CLASS_CATEGORY_DEMUXER;
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else return AV_CLASS_CATEGORY_MUXER;
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}
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static const AVClass av_format_context_class = {
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.class_name = "AVFormatContext",
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.item_name = format_to_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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.child_next = format_child_next,
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.child_class_next = format_child_class_next,
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.category = AV_CLASS_CATEGORY_MUXER,
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.get_category = get_category,
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};
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static void avformat_get_context_defaults(AVFormatContext *s)
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{
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memset(s, 0, sizeof(AVFormatContext));
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s->av_class = &av_format_context_class;
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av_opt_set_defaults(s);
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}
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AVFormatContext *avformat_alloc_context(void)
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{
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AVFormatContext *ic;
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ic = av_malloc(sizeof(AVFormatContext));
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if (!ic) return ic;
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avformat_get_context_defaults(ic);
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return ic;
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}
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enum AVDurationEstimationMethod av_fmt_ctx_get_duration_estimation_method(const AVFormatContext* ctx)
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{
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return ctx->duration_estimation_method;
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}
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const AVClass *avformat_get_class(void)
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{
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return &av_format_context_class;
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}
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