aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* SSA/ASS decoder
* 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 <string.h>
#include "avcodec.h"
#include "ass.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
static av_cold int ass_decode_init(AVCodecContext *avctx)
{
avctx->subtitle_header = av_malloc(avctx->extradata_size + 1);
if (!avctx->subtitle_header)
return AVERROR(ENOMEM);
if (avctx->extradata_size)
memcpy(avctx->subtitle_header, avctx->extradata, avctx->extradata_size);
avctx->subtitle_header[avctx->extradata_size] = 0;
avctx->subtitle_header_size = avctx->extradata_size;
return 0;
}
static int ass_decode_frame(AVCodecContext *avctx, void *data, int *got_sub_ptr,
AVPacket *avpkt)
{
AVSubtitle *sub = data;
if (avpkt->size <= 0)
return avpkt->size;
sub->rects = av_malloc(sizeof(*sub->rects));
if (!sub->rects)
return AVERROR(ENOMEM);
sub->rects[0] = av_mallocz(sizeof(*sub->rects[0]));
if (!sub->rects[0])
return AVERROR(ENOMEM);
sub->num_rects = 1;
sub->rects[0]->type = SUBTITLE_ASS;
sub->rects[0]->ass = av_strdup(avpkt->data);
if (!sub->rects[0]->ass)
return AVERROR(ENOMEM);
*got_sub_ptr = 1;
return avpkt->size;
}
#if CONFIG_SSA_DECODER
AVCodec ff_ssa_decoder = {
.name = "ssa",
.long_name = NULL_IF_CONFIG_SMALL("ASS (Advanced SubStation Alpha) subtitle"),
.type = AVMEDIA_TYPE_SUBTITLE,
.id = AV_CODEC_ID_ASS,
.init = ass_decode_init,
.decode = ass_decode_frame,
};
#endif
#if CONFIG_ASS_DECODER
AVCodec ff_ass_decoder = {
.name = "ass",
.long_name = NULL_IF_CONFIG_SMALL("ASS (Advanced SubStation Alpha) subtitle"),
.type = AVMEDIA_TYPE_SUBTITLE,
.id = AV_CODEC_ID_ASS,
.init = ass_decode_init,
.decode = ass_decode_frame,
};
#endif
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