mirror of https://github.com/FFmpeg/FFmpeg.git
And move those stuff already in demuxer-only files to it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>release/5.1
Andreas Rheinhardt
3 years ago
parent
20ca491664
commit
35ec5c819b
33 changed files with 175 additions and 130 deletions
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/*
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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_DEMUX_H |
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#define AVFORMAT_DEMUX_H |
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#include <stdint.h> |
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#include "libavutil/rational.h" |
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#include "libavcodec/packet.h" |
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#include "avformat.h" |
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#define RELATIVE_TS_BASE (INT64_MAX - (1LL << 48)) |
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static av_always_inline int is_relative(int64_t ts) |
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{ |
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return ts > (RELATIVE_TS_BASE - (1LL << 48)); |
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} |
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/**
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* Wrap a given time stamp, if there is an indication for an overflow |
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* |
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* @param st stream |
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* @param timestamp the time stamp to wrap |
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* @return resulting time stamp |
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*/ |
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int64_t ff_wrap_timestamp(const AVStream *st, int64_t timestamp); |
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/**
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* Read a transport packet from a media file. |
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* |
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* @param s media file handle |
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* @param pkt is filled |
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* @return 0 if OK, AVERROR_xxx on error |
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*/ |
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int ff_read_packet(AVFormatContext *s, AVPacket *pkt); |
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void ff_read_frame_flush(AVFormatContext *s); |
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/**
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* Perform a binary search using av_index_search_timestamp() and |
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* AVInputFormat.read_timestamp(). |
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* |
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* @param target_ts target timestamp in the time base of the given stream |
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* @param stream_index stream number |
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*/ |
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int ff_seek_frame_binary(AVFormatContext *s, int stream_index, |
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int64_t target_ts, int flags); |
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/**
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* Update cur_dts of all streams based on the given timestamp and AVStream. |
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* |
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* Stream ref_st unchanged, others set cur_dts in their native time base. |
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* Only needed for timestamp wrapping or if (dts not set and pts!=dts). |
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* @param timestamp new dts expressed in time_base of param ref_st |
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* @param ref_st reference stream giving time_base of param timestamp |
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*/ |
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void avpriv_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp); |
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int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos, |
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int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )); |
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/**
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* Perform a binary search using read_timestamp(). |
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* |
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* @param target_ts target timestamp in the time base of the given stream |
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* @param stream_index stream number |
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*/ |
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int64_t ff_gen_search(AVFormatContext *s, int stream_index, |
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int64_t target_ts, int64_t pos_min, |
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int64_t pos_max, int64_t pos_limit, |
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int64_t ts_min, int64_t ts_max, |
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int flags, int64_t *ts_ret, |
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int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )); |
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/**
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* Internal version of av_index_search_timestamp |
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*/ |
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int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries, |
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int64_t wanted_timestamp, int flags); |
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/**
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* Internal version of av_add_index_entry |
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*/ |
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int ff_add_index_entry(AVIndexEntry **index_entries, |
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int *nb_index_entries, |
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unsigned int *index_entries_allocated_size, |
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int64_t pos, int64_t timestamp, int size, int distance, int flags); |
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void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance); |
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/**
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* Ensure the index uses less memory than the maximum specified in |
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* AVFormatContext.max_index_size by discarding entries if it grows |
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* too large. |
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*/ |
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void ff_reduce_index(AVFormatContext *s, int stream_index); |
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/**
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* add frame for rfps calculation. |
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* |
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* @param dts timestamp of the i-th frame |
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* @return 0 if OK, AVERROR_xxx on error |
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*/ |
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int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts); |
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void ff_rfps_calculate(AVFormatContext *ic); |
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/**
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* Rescales a timestamp and the endpoints of an interval to which the temstamp |
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* belongs, from a timebase `tb_in` to a timebase `tb_out`. |
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* |
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* The upper (lower) bound of the output interval is rounded up (down) such that |
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* the output interval always falls within the intput interval. The timestamp is |
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* rounded to the nearest integer and halfway cases away from zero, and can |
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* therefore fall outside of the output interval. |
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* |
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* Useful to simplify the rescaling of the arguments of AVInputFormat::read_seek2() |
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* |
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* @param[in] tb_in Timebase of the input `min_ts`, `ts` and `max_ts` |
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* @param[in] tb_out Timebase of the ouput `min_ts`, `ts` and `max_ts` |
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* @param[in,out] min_ts Lower bound of the interval |
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* @param[in,out] ts Timestamp |
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* @param[in,out] max_ts Upper bound of the interval |
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*/ |
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void ff_rescale_interval(AVRational tb_in, AVRational tb_out, |
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int64_t *min_ts, int64_t *ts, int64_t *max_ts); |
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#endif /* AVFORMAT_DEMUX_H */ |
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