Statistics
| Branch: | Revision:

ffmpeg / libavformat / options.c @ 708ec8fb

History | View | Annotate | Download (3.49 KB)

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
/**
24
 * @file options.c
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", NULL, OFFSET(probesize), FF_OPT_TYPE_INT, 32000, 32, INT_MAX, D}, /* 32000 from mpegts.c: 1.0 second at 24Mbit/s */
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
{"track", " set the track number", OFFSET(track), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E},
50
{"year", "set the year", OFFSET(year), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, E},
51
{"analyzeduration", "how many microseconds are analyzed to estimate duration", OFFSET(max_analyze_duration), FF_OPT_TYPE_INT, 3*AV_TIME_BASE, 0, INT_MAX, D},
52
{"cryptokey", "decryption key", OFFSET(key), FF_OPT_TYPE_BINARY, 0, 0, 0, D},
53
{"indexmem", "max memory used for timestamp index (per stream)", OFFSET(max_index_size), FF_OPT_TYPE_INT, 1<<20, 0, INT_MAX, D},
54
{"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 */
55
{"fdebug", "print specific debug info", OFFSET(debug), FF_OPT_TYPE_FLAGS, DEFAULT, 0, INT_MAX, E|D, "fdebug"},
56
{"ts", NULL, 0, FF_OPT_TYPE_CONST, FF_FDEBUG_TS, INT_MIN, INT_MAX, E|D, "fdebug"},
57
{NULL},
58
};
59

    
60
#undef E
61
#undef D
62
#undef DEFAULT
63

    
64
static const AVClass av_format_context_class = { "AVFormatContext", format_to_name, options };
65

    
66
static void avformat_get_context_defaults(AVFormatContext *s)
67
{
68
    memset(s, 0, sizeof(AVFormatContext));
69

    
70
    s->av_class = &av_format_context_class;
71

    
72
    av_opt_set_defaults(s);
73
}
74

    
75
AVFormatContext *av_alloc_format_context(void)
76
{
77
    AVFormatContext *ic;
78
    ic = av_malloc(sizeof(AVFormatContext));
79
    if (!ic) return ic;
80
    avformat_get_context_defaults(ic);
81
    ic->av_class = &av_format_context_class;
82
    return ic;
83
}