mirror of https://git.ffmpeg.org/ffmpeg.git
92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
|
|
* SSA/ASS encoder
|
|
* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "config_components.h"
|
|
|
|
#include <string.h>
|
|
|
|
#include "avcodec.h"
|
|
#include "ass.h"
|
|
#include "codec_internal.h"
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/internal.h"
|
|
#include "libavutil/mem.h"
|
|
|
|
static av_cold int ass_encode_init(AVCodecContext *avctx)
|
|
{
|
|
avctx->extradata = av_malloc(avctx->subtitle_header_size + 1);
|
|
if (!avctx->extradata)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(avctx->extradata, avctx->subtitle_header, avctx->subtitle_header_size);
|
|
avctx->extradata_size = avctx->subtitle_header_size;
|
|
avctx->extradata[avctx->extradata_size] = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int ass_encode_frame(AVCodecContext *avctx,
|
|
unsigned char *buf, int bufsize,
|
|
const AVSubtitle *sub)
|
|
{
|
|
int i, len, total_len = 0;
|
|
|
|
for (i=0; i<sub->num_rects; i++) {
|
|
const char *ass = sub->rects[i]->ass;
|
|
|
|
if (sub->rects[i]->type != SUBTITLE_ASS) {
|
|
av_log(avctx, AV_LOG_ERROR, "Only SUBTITLE_ASS type supported.\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
len = av_strlcpy(buf+total_len, ass, bufsize-total_len);
|
|
|
|
if (len > bufsize-total_len-1) {
|
|
av_log(avctx, AV_LOG_ERROR, "Buffer too small for ASS event.\n");
|
|
return AVERROR_BUFFER_TOO_SMALL;
|
|
}
|
|
|
|
total_len += len;
|
|
}
|
|
|
|
return total_len;
|
|
}
|
|
|
|
#if CONFIG_SSA_ENCODER
|
|
const FFCodec ff_ssa_encoder = {
|
|
.p.name = "ssa",
|
|
CODEC_LONG_NAME("ASS (Advanced SubStation Alpha) subtitle"),
|
|
.p.type = AVMEDIA_TYPE_SUBTITLE,
|
|
.p.id = AV_CODEC_ID_ASS,
|
|
.init = ass_encode_init,
|
|
FF_CODEC_ENCODE_SUB_CB(ass_encode_frame),
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_ASS_ENCODER
|
|
const FFCodec ff_ass_encoder = {
|
|
.p.name = "ass",
|
|
CODEC_LONG_NAME("ASS (Advanced SubStation Alpha) subtitle"),
|
|
.p.type = AVMEDIA_TYPE_SUBTITLE,
|
|
.p.id = AV_CODEC_ID_ASS,
|
|
.init = ass_encode_init,
|
|
FF_CODEC_ENCODE_SUB_CB(ass_encode_frame),
|
|
};
|
|
#endif
|