/* * 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){    size_t len;     if (sub->num_rects != 1) {        av_log(avctx, AV_LOG_ERROR, "Only one rect per AVSubtitle is supported in ASS.\n");        return AVERROR_INVALIDDATA;    }     if (sub->rects[0]->type != SUBTITLE_ASS) {        av_log(avctx, AV_LOG_ERROR, "Only SUBTITLE_ASS type supported.\n");        return AVERROR(EINVAL);    }     len = av_strlcpy(buf, sub->rects[0]->ass, bufsize);     if (len >= bufsize) {        av_log(avctx, AV_LOG_ERROR, "Buffer too small for ASS event.\n");        return AVERROR_BUFFER_TOO_SMALL;    }     return len;} #if CONFIG_SSA_ENCODERconst 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_ENCODERconst 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