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libavformat
subviewer1dec.c
Go to the documentation of this file.
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/*
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* Copyright (c) 2012 Clément Bœsch
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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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/**
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* @file
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* SubViewer v1 subtitle demuxer
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*/
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#include "
avformat.h
"
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#include "
internal.h
"
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#include "
subtitles.h
"
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typedef
struct
{
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FFDemuxSubtitlesQueue
q
;
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}
SubViewer1Context
;
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static
int
subviewer1_probe
(
AVProbeData
*p)
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{
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const
unsigned
char
*ptr = p->
buf
;
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if
(strstr(ptr,
"******** START SCRIPT ********"
))
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return
AVPROBE_SCORE_EXTENSION
;
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return
0;
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}
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static
int
subviewer1_read_header
(
AVFormatContext
*
s
)
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{
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int
delay = 0;
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AVPacket
*sub = NULL;
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SubViewer1Context
*subviewer1 = s->
priv_data
;
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AVStream
*st =
avformat_new_stream
(s, NULL);
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if
(!st)
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return
AVERROR
(ENOMEM);
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avpriv_set_pts_info
(st, 64, 1, 1);
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st->
codec
->
codec_type
=
AVMEDIA_TYPE_SUBTITLE
;
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st->
codec
->
codec_id
=
AV_CODEC_ID_SUBVIEWER1
;
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while
(!
url_feof
(s->
pb
)) {
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char
line
[4096];
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int
len
=
ff_get_line
(s->
pb
, line,
sizeof
(line));
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int
hh, mm, ss;
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if
(!len)
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break
;
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if
(!strncmp(line,
"[DELAY]"
, 7)) {
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ff_get_line
(s->
pb
, line,
sizeof
(line));
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sscanf(line,
"%d"
, &delay);
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}
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if
(sscanf(line,
"[%d:%d:%d]"
, &hh, &mm, &ss) == 3) {
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const
int64_t pos =
avio_tell
(s->
pb
);
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int64_t pts_start = hh*3600LL + mm*60LL + ss + delay;
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len =
ff_get_line
(s->
pb
, line,
sizeof
(line));
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line[strcspn(line,
"\r\n"
)] = 0;
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if
(!*line) {
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if
(sub)
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sub->
duration
= pts_start - sub->
pts
;
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}
else
{
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sub =
ff_subtitles_queue_insert
(&subviewer1->
q
, line, len, 0);
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if
(!sub)
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return
AVERROR
(ENOMEM);
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sub->
pos
= pos;
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sub->
pts
= pts_start;
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sub->
duration
= -1;
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}
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}
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}
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ff_subtitles_queue_finalize
(&subviewer1->
q
);
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return
0;
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}
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static
int
subviewer1_read_packet
(
AVFormatContext
*
s
,
AVPacket
*
pkt
)
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{
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SubViewer1Context
*subviewer1 = s->
priv_data
;
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return
ff_subtitles_queue_read_packet
(&subviewer1->
q
, pkt);
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}
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static
int
subviewer1_read_seek
(
AVFormatContext
*
s
,
int
stream_index,
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int64_t min_ts, int64_t ts, int64_t max_ts,
int
flags
)
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{
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SubViewer1Context
*subviewer1 = s->
priv_data
;
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return
ff_subtitles_queue_seek
(&subviewer1->
q
, s, stream_index,
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min_ts, ts, max_ts, flags);
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}
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static
int
subviewer1_read_close
(
AVFormatContext
*
s
)
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{
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SubViewer1Context
*subviewer1 = s->
priv_data
;
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ff_subtitles_queue_clean
(&subviewer1->
q
);
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return
0;
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}
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AVInputFormat
ff_subviewer1_demuxer
= {
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.
name
=
"subviewer1"
,
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.long_name =
NULL_IF_CONFIG_SMALL
(
"SubViewer v1 subtitle format"
),
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.priv_data_size =
sizeof
(
SubViewer1Context
),
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.
read_probe
=
subviewer1_probe
,
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.
read_header
=
subviewer1_read_header
,
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.
read_packet
=
subviewer1_read_packet
,
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.read_seek2 =
subviewer1_read_seek
,
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.
read_close
=
subviewer1_read_close
,
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.extensions =
"sub"
,
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};
Generated on Wed Jul 10 2013 23:48:14 for FFmpeg by
1.8.2