mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-23 19:30:05 +00:00
466b39efaf
AVCodecContext.encode is currently used only for subtitles, encode2 is used for audio and video.
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/*
|
|
* SSA/ASS encoder
|
|
* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include "avcodec.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);
|
|
if (!avctx->extradata)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(avctx->extradata, avctx->subtitle_header, avctx->subtitle_header_size);
|
|
avctx->extradata_size = avctx->subtitle_header_size;
|
|
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++) {
|
|
if (sub->rects[i]->type != SUBTITLE_ASS) {
|
|
av_log(avctx, AV_LOG_ERROR, "Only SUBTITLE_ASS type supported.\n");
|
|
return -1;
|
|
}
|
|
|
|
len = av_strlcpy(buf+total_len, sub->rects[i]->ass, bufsize-total_len);
|
|
|
|
if (len > bufsize-total_len-1) {
|
|
av_log(avctx, AV_LOG_ERROR, "Buffer too small for ASS event.\n");
|
|
return -1;
|
|
}
|
|
|
|
total_len += len;
|
|
}
|
|
|
|
return total_len;
|
|
}
|
|
|
|
AVCodec ff_ass_encoder = {
|
|
.name = "ass",
|
|
.long_name = NULL_IF_CONFIG_SMALL("SSA (SubStation Alpha) subtitle"),
|
|
.type = AVMEDIA_TYPE_SUBTITLE,
|
|
.id = AV_CODEC_ID_SSA,
|
|
.init = ass_encode_init,
|
|
.encode_sub = ass_encode_frame,
|
|
};
|