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https://git.ffmpeg.org/ffmpeg.git
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20ca491664
Only used by muxers. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
146 lines
5.0 KiB
C
146 lines
5.0 KiB
C
/*
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* copyright (c) 2001 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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#ifndef AVFORMAT_MUX_H
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#define AVFORMAT_MUX_H
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#include <stdint.h>
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#include "libavcodec/packet.h"
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#include "avformat.h"
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/**
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* Add packet to an AVFormatContext's packet_buffer list, determining its
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* interleaved position using compare() function argument.
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* @return 0 on success, < 0 on error. pkt will always be blank on return.
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*/
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int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
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int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *));
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/**
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* Interleave an AVPacket per dts so it can be muxed.
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* See the documentation of AVOutputFormat.interleave_packet for details.
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*/
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int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *pkt,
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int flush, int has_packet);
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/**
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* Interleave packets directly in the order in which they arrive
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* without any sort of buffering.
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*/
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int ff_interleave_packet_passthrough(AVFormatContext *s, AVPacket *pkt,
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int flush, int has_packet);
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/**
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* Find the next packet in the interleaving queue for the given stream.
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*
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* @return a pointer to a packet if one was found, NULL otherwise.
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*/
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const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream);
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int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset);
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/**
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* Add a bitstream filter to a stream.
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*
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* @param st output stream to add a filter to
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* @param name the name of the filter to add
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* @param args filter-specific argument string
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* @return >0 on success;
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* AVERROR code on failure
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*/
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int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args);
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/**
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* Write a packet to another muxer than the one the user originally
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* intended. Useful when chaining muxers, where one muxer internally
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* writes a received packet to another muxer.
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*
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* @param dst the muxer to write the packet to
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* @param dst_stream the stream index within dst to write the packet to
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* @param pkt the packet to be written. It will be returned blank when
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* av_interleaved_write_frame() is used, unchanged otherwise.
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* @param src the muxer the packet originally was intended for
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* @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
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* @return the value av_write_frame returned
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*/
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int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
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AVFormatContext *src, int interleave);
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/**
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* Flags for AVFormatContext.write_uncoded_frame()
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*/
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enum AVWriteUncodedFrameFlags {
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/**
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* Query whether the feature is possible on this stream.
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* The frame argument is ignored.
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*/
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AV_WRITE_UNCODED_FRAME_QUERY = 0x0001,
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};
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/**
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* Make shift_size amount of space at read_start by shifting data in the output
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* at read_start until the current IO position. The underlying IO context must
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* be seekable.
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*/
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int ff_format_shift_data(AVFormatContext *s, int64_t read_start, int shift_size);
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/**
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* Utility function to open IO stream of output format.
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*
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* @param s AVFormatContext
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* @param url URL or file name to open for writing
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* @options optional options which will be passed to io_open callback
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* @return >=0 on success, negative AVERROR in case of failure
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*/
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int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options);
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/**
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* Copy encoding parameters from source to destination stream
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*
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* @param dst pointer to destination AVStream
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* @param src pointer to source AVStream
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* @return >=0 on success, AVERROR code on error
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*/
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int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src);
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/**
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* Parse creation_time in AVFormatContext metadata if exists and warn if the
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* parsing fails.
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*
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* @param s AVFormatContext
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* @param timestamp parsed timestamp in microseconds, only set on successful parsing
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* @param return_seconds set this to get the number of seconds in timestamp instead of microseconds
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* @return 1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error
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*/
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int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
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/**
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* Standardize creation_time metadata in AVFormatContext to an ISO-8601
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* timestamp string.
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*
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* @param s AVFormatContext
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* @return <0 on error
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*/
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int ff_standardize_creation_time(AVFormatContext *s);
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#endif /* AVFORMAT_MUX_H */
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