mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
ff3624b1ad
This function is almost identical to lavf/assdec:read_seek2(). It performs a generic seek for text subtitles demuxers for the new seeking API. The only difference with assdec:read_seek2 is the ts_diff being unsigned to avoid overflows. The seek callback in the ASS demuxer will be removed when it is redesigned to use FFDemuxSubtitlesQueue.
85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2012 Clément Bœsch
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef AVFORMAT_SUBTITLES_H
|
|
#define AVFORMAT_SUBTITLES_H
|
|
|
|
#include <stdint.h>
|
|
#include "avformat.h"
|
|
#include "libavutil/bprint.h"
|
|
|
|
typedef struct {
|
|
AVPacket *subs; ///< array of subtitles packets
|
|
int nb_subs; ///< number of subtitles packets
|
|
int allocated_size; ///< allocated size for subs
|
|
int current_sub_idx; ///< current position for the read packet callback
|
|
} FFDemuxSubtitlesQueue;
|
|
|
|
/**
|
|
* Insert a new subtitle event.
|
|
*
|
|
* @param event the subtitle line, may not be zero terminated
|
|
* @param len the length of the event (in strlen() sense, so without '\0')
|
|
* @param merge set to 1 if the current event should be concatenated with the
|
|
* previous one instead of adding a new entry, 0 otherwise
|
|
*/
|
|
AVPacket *ff_subtitles_queue_insert(FFDemuxSubtitlesQueue *q,
|
|
const uint8_t *event, int len, int merge);
|
|
|
|
/**
|
|
* Set missing durations and sort subtitles by PTS, and then byte position.
|
|
*/
|
|
void ff_subtitles_queue_finalize(FFDemuxSubtitlesQueue *q);
|
|
|
|
/**
|
|
* Generic read_packet() callback for subtitles demuxers using this queue
|
|
* system.
|
|
*/
|
|
int ff_subtitles_queue_read_packet(FFDemuxSubtitlesQueue *q, AVPacket *pkt);
|
|
|
|
/**
|
|
* Update current_sub_idx to emulate a seek. Except the first parameter, it
|
|
* matches AVInputFormat->read_seek2 prototypes.
|
|
*/
|
|
int ff_subtitles_queue_seek(FFDemuxSubtitlesQueue *q, AVFormatContext *s, int stream_index,
|
|
int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
|
|
|
|
/**
|
|
* Remove and destroy all the subtitles packets.
|
|
*/
|
|
void ff_subtitles_queue_clean(FFDemuxSubtitlesQueue *q);
|
|
|
|
/**
|
|
* SMIL helper to load next chunk ("<...>" or untagged content) in buf.
|
|
*
|
|
* @param c cached character, to avoid a backward seek
|
|
*/
|
|
int ff_smil_extract_next_chunk(AVIOContext *pb, AVBPrint *buf, char *c);
|
|
|
|
/**
|
|
* SMIL helper to point on the value of an attribute in the given tag.
|
|
*
|
|
* @param s SMIL tag ("<...>")
|
|
* @param attr the attribute to look for
|
|
*/
|
|
const char *ff_smil_get_attr_ptr(const char *s, const char *attr);
|
|
|
|
#endif /* AVFORMAT_SUBTITLES_H */
|