Statistics
| Branch: | Revision:

ffmpeg / libavformat / options.c @ 4df001d7

History | View | Annotate | Download (3.89 KB)

1
/*
2
 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
3
 *
4
 * This file is part of Libav.
5
 *
6
 * Libav 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
 * Libav 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 Libav; 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 "libavutil/opt.h"
22

    
23
/**
24
 * @file
25
 * Options definition for AVFormatContext.
26
 */
27

    
28
static 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

    
42
static const AVOption options[]={
43
{"probesize", "set probing size", OFFSET(probesize), FF_OPT_TYPE_INT, 5000000, 32, INT_MAX, D},
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"},
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"},
51
{"igndts", "ignore dts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNDTS, INT_MIN, INT_MAX, D, "fflags"},
52
{"rtphint", "add rtp hinting", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_RTP_HINT, INT_MIN, INT_MAX, E, "fflags"},
53
{"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},
54
{"cryptokey", "decryption key", OFFSET(key), FF_OPT_TYPE_BINARY, 0, 0, 0, D},
55
{"indexmem", "max memory used for timestamp index (per stream)", OFFSET(max_index_size), FF_OPT_TYPE_INT, 1<<20, 0, INT_MAX, D},
56
{"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 */
57
{"fdebug", "print specific debug info", OFFSET(debug), FF_OPT_TYPE_FLAGS, DEFAULT, 0, INT_MAX, E|D, "fdebug"},
58
{"ts", NULL, 0, FF_OPT_TYPE_CONST, FF_FDEBUG_TS, INT_MIN, INT_MAX, E|D, "fdebug"},
59
{"max_delay", "maximum muxing or demuxing delay in microseconds", OFFSET(max_delay), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E|D},
60
{NULL},
61
};
62

    
63
#undef E
64
#undef D
65
#undef DEFAULT
66

    
67
static const AVClass av_format_context_class = { "AVFormatContext", format_to_name, options, LIBAVUTIL_VERSION_INT };
68

    
69
static void avformat_get_context_defaults(AVFormatContext *s)
70
{
71
    memset(s, 0, sizeof(AVFormatContext));
72

    
73
    s->av_class = &av_format_context_class;
74

    
75
    av_opt_set_defaults(s);
76
}
77

    
78
AVFormatContext *avformat_alloc_context(void)
79
{
80
    AVFormatContext *ic;
81
    ic = av_malloc(sizeof(AVFormatContext));
82
    if (!ic) return ic;
83
    avformat_get_context_defaults(ic);
84
    ic->av_class = &av_format_context_class;
85
    return ic;
86
}