From 5952be07dc3fdd7bb9fa497b2a3fd12fc7287b41 Mon Sep 17 00:00:00 2001 From: Aurelien Jacobs Date: Sat, 13 Nov 2010 14:18:59 +0000 Subject: add missing files in previous commit (ASS encoder and decoder) Originally committed as revision 25747 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/assenc.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 libavcodec/assenc.c (limited to 'libavcodec/assenc.c') diff --git a/libavcodec/assenc.c b/libavcodec/assenc.c new file mode 100644 index 0000000000..c6f017ce5d --- /dev/null +++ b/libavcodec/assenc.c @@ -0,0 +1,67 @@ +/* + * SSA/ASS encoder + * Copyright (c) 2010 Aurelien Jacobs + * + * 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 "avcodec.h" +#include "libavutil/avstring.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, void *data) +{ + AVSubtitle *sub = data; + int i, len, total_len = 0; + + for (i=0; inum_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 ass_encoder = { + .name = "ass", + .long_name = NULL_IF_CONFIG_SMALL("Advanced SubStation Alpha subtitle"), + .type = AVMEDIA_TYPE_SUBTITLE, + .id = CODEC_ID_SSA, + .init = ass_encode_init, + .encode = ass_encode_frame, +}; -- cgit v1.2.3