mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-09-19 21:06:42 +00:00
c0f867bf50
Change some internal APIs a bit to make it harder to make such mistakes. In particular, have the read chunk functions return an error when the result is incomplete. This might be less flexible, but since there has been no use-case for that so far, avoiding coding mistakes seems better. Add a function to queue a AVBPrint directly (ff_subtitles_queue_insert_bprint). Also fixes a leak in lrcdec when ff_subtitles_queue_insert fails. Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
136 lines
4.0 KiB
C
136 lines
4.0 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* SAMI subtitle demuxer
|
|
* @see http://msdn.microsoft.com/en-us/library/ms971327.aspx
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "subtitles.h"
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/bprint.h"
|
|
|
|
typedef struct {
|
|
FFDemuxSubtitlesQueue q;
|
|
} SAMIContext;
|
|
|
|
static int sami_probe(const AVProbeData *p)
|
|
{
|
|
char buf[6];
|
|
FFTextReader tr;
|
|
ff_text_init_buf(&tr, p->buf, p->buf_size);
|
|
ff_text_read(&tr, buf, sizeof(buf));
|
|
|
|
return !strncmp(buf, "<SAMI>", 6) ? AVPROBE_SCORE_MAX : 0;
|
|
}
|
|
|
|
static int sami_read_header(AVFormatContext *s)
|
|
{
|
|
SAMIContext *sami = s->priv_data;
|
|
AVStream *st = avformat_new_stream(s, NULL);
|
|
AVBPrint buf, hdr_buf;
|
|
char c = 0;
|
|
int res = 0, got_first_sync_point = 0;
|
|
FFTextReader tr;
|
|
ff_text_init_avio(s, &tr, s->pb);
|
|
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
avpriv_set_pts_info(st, 64, 1, 1000);
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
|
|
st->codecpar->codec_id = AV_CODEC_ID_SAMI;
|
|
|
|
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
|
|
av_bprint_init(&hdr_buf, 0, AV_BPRINT_SIZE_UNLIMITED);
|
|
|
|
while (!ff_text_eof(&tr)) {
|
|
AVPacket *sub;
|
|
const int64_t pos = ff_text_pos(&tr) - (c != 0);
|
|
int is_sync, is_body, n = ff_smil_extract_next_text_chunk(&tr, &buf, &c);
|
|
|
|
if (n < 0) {
|
|
res = n;
|
|
goto end;
|
|
}
|
|
if (n == 0)
|
|
break;
|
|
|
|
is_body = !av_strncasecmp(buf.str, "</BODY", 6);
|
|
if (is_body) {
|
|
av_bprint_clear(&buf);
|
|
break;
|
|
}
|
|
|
|
is_sync = !av_strncasecmp(buf.str, "<SYNC", 5);
|
|
if (is_sync)
|
|
got_first_sync_point = 1;
|
|
|
|
if (!got_first_sync_point) {
|
|
av_bprintf(&hdr_buf, "%s", buf.str);
|
|
} else {
|
|
sub = ff_subtitles_queue_insert_bprint(&sami->q, &buf, !is_sync);
|
|
if (!sub) {
|
|
res = AVERROR(ENOMEM);
|
|
av_bprint_finalize(&hdr_buf, NULL);
|
|
goto end;
|
|
}
|
|
if (is_sync) {
|
|
const char *p = ff_smil_get_attr_ptr(buf.str, "Start");
|
|
sub->pos = pos;
|
|
sub->pts = p ? strtol(p, NULL, 10) : 0;
|
|
if (sub->pts <= INT64_MIN/2 || sub->pts >= INT64_MAX/2) {
|
|
res = AVERROR_PATCHWELCOME;
|
|
av_bprint_finalize(&hdr_buf, NULL);
|
|
goto end;
|
|
}
|
|
|
|
sub->duration = -1;
|
|
}
|
|
}
|
|
av_bprint_clear(&buf);
|
|
}
|
|
|
|
res = ff_bprint_to_codecpar_extradata(st->codecpar, &hdr_buf);
|
|
if (res < 0)
|
|
goto end;
|
|
|
|
ff_subtitles_queue_finalize(s, &sami->q);
|
|
|
|
end:
|
|
av_bprint_finalize(&buf, NULL);
|
|
return res;
|
|
}
|
|
|
|
const AVInputFormat ff_sami_demuxer = {
|
|
.name = "sami",
|
|
.long_name = NULL_IF_CONFIG_SMALL("SAMI subtitle format"),
|
|
.priv_data_size = sizeof(SAMIContext),
|
|
.flags_internal = FF_FMT_INIT_CLEANUP,
|
|
.read_probe = sami_probe,
|
|
.read_header = sami_read_header,
|
|
.extensions = "smi,sami",
|
|
.read_packet = ff_subtitles_read_packet,
|
|
.read_seek2 = ff_subtitles_read_seek,
|
|
.read_close = ff_subtitles_read_close,
|
|
};
|