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158 lines
6.8 KiB
158 lines
6.8 KiB
/* |
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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{"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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{"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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/* this is a crutch for avconv, since it cannot deal with identically named options in different contexts. |
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* to be removed when avconv is fixed */ |
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{"f_err_detect", "set error detection flags (deprecated; use err_detect, save via avconv)", OFFSET(error_recognition), AV_OPT_TYPE_FLAGS, {.dbl = AV_EF_CRCCHECK }, INT_MIN, INT_MAX, D, "err_detect"}, |
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{"err_detect", "set error detection flags", OFFSET(error_recognition), AV_OPT_TYPE_FLAGS, {.dbl = AV_EF_CRCCHECK }, INT_MIN, INT_MAX, D, "err_detect"}, |
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{"crccheck", "verify embedded CRCs", 0, AV_OPT_TYPE_CONST, {.dbl = AV_EF_CRCCHECK }, INT_MIN, INT_MAX, D, "err_detect"}, |
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{"bitstream", "detect bitstream specification deviations", 0, AV_OPT_TYPE_CONST, {.dbl = AV_EF_BITSTREAM }, INT_MIN, INT_MAX, D, "err_detect"}, |
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{"buffer", "detect improper bitstream length", 0, AV_OPT_TYPE_CONST, {.dbl = AV_EF_BUFFER }, INT_MIN, INT_MAX, D, "err_detect"}, |
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{"explode", "abort decoding on minor error detection", 0, AV_OPT_TYPE_CONST, {.dbl = AV_EF_EXPLODE }, INT_MIN, INT_MAX, D, "err_detect"}, |
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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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