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