/* * SSA/ASS decoder * 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 "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); if (!avctx->extradata) return AVERROR(ENOMEM); memcpy(avctx->subtitle_header, avctx->extradata, avctx->extradata_size); avctx->subtitle_header_size = avctx->extradata_size; return 0; } static int ass_decode_frame(AVCodecContext *avctx, void *data, int *got_sub_ptr, AVPacket *avpkt) { const char *ptr = avpkt->data; int len, size = avpkt->size; ff_ass_init(data); while (size > 0) { len = ff_ass_add_rect(data, ptr, 0, 0/* FIXME: duration */, 1); if (len < 0) return len; ptr += len; size -= len; } *got_sub_ptr = avpkt->size > 0; return avpkt->size; } AVCodec ff_ass_decoder = { .name = "ass", .long_name = NULL_IF_CONFIG_SMALL("SSA (SubStation Alpha) subtitle"), .type = AVMEDIA_TYPE_SUBTITLE, .id = AV_CODEC_ID_SSA, .init = ass_decode_init, .decode = ass_decode_frame, };