| /* |
| * Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #include "avformat.h" |
| #include "libavutil/opt.h" |
| |
| /** |
| * @file |
| * Options definition for AVFormatContext. |
| */ |
| |
| static const char* format_to_name(void* ptr) |
| { |
| AVFormatContext* fc = (AVFormatContext*) ptr; |
| if(fc->iformat) return fc->iformat->name; |
| else if(fc->oformat) return fc->oformat->name; |
| else return "NULL"; |
| } |
| |
| static const AVOption *opt_find(void *obj, const char *name, const char *unit, int opt_flags, int search_flags) |
| { |
| AVFormatContext *s = obj; |
| AVInputFormat *ifmt = NULL; |
| AVOutputFormat *ofmt = NULL; |
| if (s->priv_data) { |
| if ((s->iformat && !s->iformat->priv_class) || |
| (s->oformat && !s->oformat->priv_class)) |
| return NULL; |
| return av_opt_find(s->priv_data, name, unit, opt_flags, search_flags); |
| } |
| |
| while ((ifmt = av_iformat_next(ifmt))) { |
| const AVOption *o; |
| |
| if (ifmt->priv_class && (o = av_opt_find(&ifmt->priv_class, name, unit, opt_flags, search_flags))) |
| return o; |
| } |
| while ((ofmt = av_oformat_next(ofmt))) { |
| const AVOption *o; |
| |
| if (ofmt->priv_class && (o = av_opt_find(&ofmt->priv_class, name, unit, opt_flags, search_flags))) |
| return o; |
| } |
| return NULL; |
| } |
| |
| #define OFFSET(x) offsetof(AVFormatContext,x) |
| #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 |
| //these names are too long to be readable |
| #define E AV_OPT_FLAG_ENCODING_PARAM |
| #define D AV_OPT_FLAG_DECODING_PARAM |
| |
| static const AVOption options[]={ |
| {"probesize", "set probing size", OFFSET(probesize), FF_OPT_TYPE_INT, {.dbl = 5000000 }, 32, INT_MAX, D}, |
| {"muxrate", "set mux rate", OFFSET(mux_rate), FF_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, INT_MAX, E}, |
| {"packetsize", "set packet size", OFFSET(packet_size), FF_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, INT_MAX, E}, |
| {"fflags", NULL, OFFSET(flags), FF_OPT_TYPE_FLAGS, {.dbl = DEFAULT }, INT_MIN, INT_MAX, D|E, "fflags"}, |
| {"ignidx", "ignore index", 0, FF_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_IGNIDX }, INT_MIN, INT_MAX, D, "fflags"}, |
| {"genpts", "generate pts", 0, FF_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_GENPTS }, INT_MIN, INT_MAX, D, "fflags"}, |
| {"nofillin", "do not fill in missing values that can be exactly calculated", 0, FF_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_NOFILLIN }, INT_MIN, INT_MAX, D, "fflags"}, |
| {"noparse", "disable AVParsers, this needs nofillin too", 0, FF_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_NOPARSE }, INT_MIN, INT_MAX, D, "fflags"}, |
| {"igndts", "ignore dts", 0, FF_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_IGNDTS }, INT_MIN, INT_MAX, D, "fflags"}, |
| #if FF_API_FLAG_RTP_HINT |
| {"rtphint", "add rtp hinting (deprecated, use the -movflags rtphint option instead)", 0, FF_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_RTP_HINT }, INT_MIN, INT_MAX, E, "fflags"}, |
| #endif |
| {"sortdts", "try to interleave outputted packets by dts", 0, FF_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_SORT_DTS }, INT_MIN, INT_MAX, D, "fflags"}, |
| {"keepside", "dont merge side data", 0, FF_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_KEEP_SIDE_DATA }, INT_MIN, INT_MAX, D, "fflags"}, |
| {"latm", "enable RTP MP4A-LATM payload", 0, FF_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_MP4A_LATM }, INT_MIN, INT_MAX, E, "fflags"}, |
| {"analyzeduration", "how many microseconds are analyzed to estimate duration", OFFSET(max_analyze_duration), FF_OPT_TYPE_INT, {.dbl = 5*AV_TIME_BASE }, 0, INT_MAX, D}, |
| {"cryptokey", "decryption key", OFFSET(key), FF_OPT_TYPE_BINARY, {.dbl = 0}, 0, 0, D}, |
| {"indexmem", "max memory used for timestamp index (per stream)", OFFSET(max_index_size), FF_OPT_TYPE_INT, {.dbl = 1<<20 }, 0, INT_MAX, D}, |
| {"rtbufsize", "max memory used for buffering real-time frames", OFFSET(max_picture_buffer), FF_OPT_TYPE_INT, {.dbl = 3041280 }, 0, INT_MAX, D}, /* defaults to 1s of 15fps 352x288 YUYV422 video */ |
| {"fdebug", "print specific debug info", OFFSET(debug), FF_OPT_TYPE_FLAGS, {.dbl = DEFAULT }, 0, INT_MAX, E|D, "fdebug"}, |
| {"ts", NULL, 0, FF_OPT_TYPE_CONST, {.dbl = FF_FDEBUG_TS }, INT_MIN, INT_MAX, E|D, "fdebug"}, |
| {"max_delay", "maximum muxing or demuxing delay in microseconds", OFFSET(max_delay), FF_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, INT_MAX, E|D}, |
| {"fpsprobesize", "number of frames used to probe fps", OFFSET(fps_probe_size), FF_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX-1, D}, |
| {NULL}, |
| }; |
| |
| #undef E |
| #undef D |
| #undef DEFAULT |
| |
| static const AVClass av_format_context_class = { |
| .class_name = "AVFormatContext", |
| .item_name = format_to_name, |
| .option = options, |
| .version = LIBAVUTIL_VERSION_INT, |
| .opt_find = opt_find, |
| }; |
| |
| static void avformat_get_context_defaults(AVFormatContext *s) |
| { |
| memset(s, 0, sizeof(AVFormatContext)); |
| |
| s->av_class = &av_format_context_class; |
| |
| av_opt_set_defaults(s); |
| } |
| |
| AVFormatContext *avformat_alloc_context(void) |
| { |
| AVFormatContext *ic; |
| ic = av_malloc(sizeof(AVFormatContext)); |
| if (!ic) return ic; |
| avformat_get_context_defaults(ic); |
| return ic; |
| } |