Libav
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00001 /* 00002 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard 00003 * 00004 * This file is part of FFmpeg. 00005 * 00006 * FFmpeg is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public 00008 * License as published by the Free Software Foundation; either 00009 * version 2.1 of the License, or (at your option) any later version. 00010 * 00011 * FFmpeg is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public 00017 * License along with FFmpeg; if not, write to the Free Software 00018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00019 */ 00020 #include "avformat.h" 00021 #include "libavcodec/opt.h" 00022 00028 static const char* format_to_name(void* ptr) 00029 { 00030 AVFormatContext* fc = (AVFormatContext*) ptr; 00031 if(fc->iformat) return fc->iformat->name; 00032 else if(fc->oformat) return fc->oformat->name; 00033 else return "NULL"; 00034 } 00035 00036 #define OFFSET(x) offsetof(AVFormatContext,x) 00037 #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 00038 //these names are too long to be readable 00039 #define E AV_OPT_FLAG_ENCODING_PARAM 00040 #define D AV_OPT_FLAG_DECODING_PARAM 00041 00042 static const AVOption options[]={ 00043 {"probesize", "set probing size", OFFSET(probesize), FF_OPT_TYPE_INT, 5000000, 32, INT_MAX, D}, 00044 {"muxrate", "set mux rate", OFFSET(mux_rate), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E}, 00045 {"packetsize", "set packet size", OFFSET(packet_size), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E}, 00046 {"fflags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, D|E, "fflags"}, 00047 {"ignidx", "ignore index", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNIDX, INT_MIN, INT_MAX, D, "fflags"}, 00048 {"genpts", "generate pts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_GENPTS, INT_MIN, INT_MAX, D, "fflags"}, 00049 {"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"}, 00050 {"noparse", "disable AVParsers, this needs nofillin too", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_NOPARSE, INT_MIN, INT_MAX, D, "fflags"}, 00051 {"igndts", "ingore dts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_IGNDTS, INT_MIN, INT_MAX, D, "fflags"}, 00052 {"rtphint", "add rtp hinting", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_RTP_HINT, INT_MIN, INT_MAX, E, "fflags"}, 00053 #if LIBAVFORMAT_VERSION_INT < (53<<16) 00054 {"track", " set the track number", OFFSET(track), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E}, 00055 {"year", "set the year", OFFSET(year), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, E}, 00056 #endif 00057 {"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}, 00058 {"cryptokey", "decryption key", OFFSET(key), FF_OPT_TYPE_BINARY, 0, 0, 0, D}, 00059 {"indexmem", "max memory used for timestamp index (per stream)", OFFSET(max_index_size), FF_OPT_TYPE_INT, 1<<20, 0, INT_MAX, D}, 00060 {"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 */ 00061 {"fdebug", "print specific debug info", OFFSET(debug), FF_OPT_TYPE_FLAGS, DEFAULT, 0, INT_MAX, E|D, "fdebug"}, 00062 {"ts", NULL, 0, FF_OPT_TYPE_CONST, FF_FDEBUG_TS, INT_MIN, INT_MAX, E|D, "fdebug"}, 00063 {NULL}, 00064 }; 00065 00066 #undef E 00067 #undef D 00068 #undef DEFAULT 00069 00070 static const AVClass av_format_context_class = { "AVFormatContext", format_to_name, options, LIBAVUTIL_VERSION_INT }; 00071 00072 static void avformat_get_context_defaults(AVFormatContext *s) 00073 { 00074 memset(s, 0, sizeof(AVFormatContext)); 00075 00076 s->av_class = &av_format_context_class; 00077 00078 av_opt_set_defaults(s); 00079 } 00080 00081 AVFormatContext *avformat_alloc_context(void) 00082 { 00083 AVFormatContext *ic; 00084 ic = av_malloc(sizeof(AVFormatContext)); 00085 if (!ic) return ic; 00086 avformat_get_context_defaults(ic); 00087 ic->av_class = &av_format_context_class; 00088 return ic; 00089 } 00090 00091 #if LIBAVFORMAT_VERSION_MAJOR < 53 00092 AVFormatContext *av_alloc_format_context(void) 00093 { 00094 return avformat_alloc_context(); 00095 } 00096 #endif