Add version to AVClass so we can add to and use fields of AVClass without ABI issues.
[libav.git] / libavformat / options.c
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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 "libavcodec/opt.h"
22
23/**
ba87f080 24 * @file
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25 * Options definition for AVFormatContext.
26 */
27
28static const char* format_to_name(void* ptr)
29{
30 AVFormatContext* fc = (AVFormatContext*) ptr;
31 if(fc->iformat) return fc->iformat->name;
32 else if(fc->oformat) return fc->oformat->name;
33 else return "NULL";
34}
35
36#define OFFSET(x) offsetof(AVFormatContext,x)
37#define DEFAULT 0 //should be NAN but it does not work as it is not a constant in glibc as required by ANSI/ISO C
38//these names are too long to be readable
39#define E AV_OPT_FLAG_ENCODING_PARAM
40#define D AV_OPT_FLAG_DECODING_PARAM
41
42static const AVOption options[]={
57011a13 43{"probesize", "set probing size", OFFSET(probesize), FF_OPT_TYPE_INT, 5000000, 32, INT_MAX, D},
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44{"muxrate", "set mux rate", OFFSET(mux_rate), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
45{"packetsize", "set packet size", OFFSET(packet_size), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
46{"fflags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, D|E, "fflags"},
47{"ignidx", "ignore index", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNIDX, INT_MIN, INT_MAX, D, "fflags"},
48{"genpts", "generate pts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_GENPTS, INT_MIN, INT_MAX, D, "fflags"},
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49{"nofillin", "do not fill in missing values that can be exactly calculated", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_NOFILLIN, INT_MIN, INT_MAX, D, "fflags"},
50{"noparse", "disable AVParsers, this needs nofillin too", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_NOPARSE, INT_MIN, INT_MAX, D, "fflags"},
c55806e3 51{"igndts", "ingore dts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNDTS, INT_MIN, INT_MAX, D, "fflags"},
827f7e28 52#if LIBAVFORMAT_VERSION_INT < (53<<16)
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53{"track", " set the track number", OFFSET(track), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
54{"year", "set the year", OFFSET(year), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, E},
827f7e28 55#endif
66ddc150 56{"analyzeduration", "how many microseconds are analyzed to estimate duration", OFFSET(max_analyze_duration), FF_OPT_TYPE_INT, 5*AV_TIME_BASE, 0, INT_MAX, D},
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57{"cryptokey", "decryption key", OFFSET(key), FF_OPT_TYPE_BINARY, 0, 0, 0, D},
58{"indexmem", "max memory used for timestamp index (per stream)", OFFSET(max_index_size), FF_OPT_TYPE_INT, 1<<20, 0, INT_MAX, D},
59{"rtbufsize", "max memory used for buffering real-time frames", OFFSET(max_picture_buffer), FF_OPT_TYPE_INT, 3041280, 0, INT_MAX, D}, /* defaults to 1s of 15fps 352x288 YUYV422 video */
60{"fdebug", "print specific debug info", OFFSET(debug), FF_OPT_TYPE_FLAGS, DEFAULT, 0, INT_MAX, E|D, "fdebug"},
61{"ts", NULL, 0, FF_OPT_TYPE_CONST, FF_FDEBUG_TS, INT_MIN, INT_MAX, E|D, "fdebug"},
62{NULL},
63};
64
65#undef E
66#undef D
67#undef DEFAULT
68
2308b6c1 69static const AVClass av_format_context_class = { "AVFormatContext", format_to_name, options, LIBAVUTIL_VERSION_INT };
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70
71static void avformat_get_context_defaults(AVFormatContext *s)
72{
73 memset(s, 0, sizeof(AVFormatContext));
74
75 s->av_class = &av_format_context_class;
76
77 av_opt_set_defaults(s);
78}
79
88a28965 80AVFormatContext *avformat_alloc_context(void)
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81{
82 AVFormatContext *ic;
83 ic = av_malloc(sizeof(AVFormatContext));
84 if (!ic) return ic;
85 avformat_get_context_defaults(ic);
86 ic->av_class = &av_format_context_class;
87 return ic;
88}
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89
90#if LIBAVFORMAT_VERSION_MAJOR < 53
91AVFormatContext *av_alloc_format_context(void)
92{
93 return avformat_alloc_context();
94}
95#endif