| /* |
| * 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); |
| |
| /** |
| * @brief Read a subtitles chunk. |
| * |
| * A chunk is defined by a multiline "event", ending with a second line break. |
| * The trailing line breaks are trimmed. CRLF are supported. |
| * Example: "foo\r\nbar\r\n\r\nnext" will print "foo\r\nbar" into buf, and pb |
| * will focus on the 'n' of the "next" string. |
| * |
| * @param pb I/O context |
| * @param buf an initialized buf where the chunk is written |
| * |
| * @note buf is cleared before writing into it. |
| */ |
| void ff_subtitles_read_chunk(AVIOContext *pb, AVBPrint *buf); |
| |
| #endif /* AVFORMAT_SUBTITLES_H */ |