/* * 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_DECODERAVCodec 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_DECODERAVCodec 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