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f4167842c1
More exactly: Not more than one stream of each type for which a default codec (i.e. AVOutputFormat.(audio|video|subtitle)_codec) is set; for those types for which no such codec is set (or for which no designated default codec in AVOutputFormat exists at all) no streams are permitted. Given that with this flag set the default codecs become more important, they are now set explicitly to AV_CODEC_ID_NONE for "unset"; the earlier code relied on AV_CODEC_ID_NONE being equal to zero, so that default static initialization set it accordingly; but this is not how one is supposed to use an enum. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/*
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* SUP muxer
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* Copyright (c) 2014 Petri Hintukainen <phintuka@users.sourceforge.net>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "internal.h"
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#include "mux.h"
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#include "libavutil/intreadwrite.h"
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#define SUP_PGS_MAGIC 0x5047 /* "PG", big endian */
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static int sup_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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const uint8_t *data = pkt->data;
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size_t size = pkt->size;
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uint32_t pts = 0, dts = 0;
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if (pkt->pts != AV_NOPTS_VALUE) {
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pts = pkt->pts;
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}
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if (pkt->dts != AV_NOPTS_VALUE) {
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dts = pkt->dts;
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}
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/*
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Split frame to segments.
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mkvmerge stores multiple segments in one frame.
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*/
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while (size > 2) {
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size_t len = AV_RB16(data + 1) + 3;
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if (len > size) {
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av_log(s, AV_LOG_ERROR, "Not enough data, skipping %"SIZE_SPECIFIER" bytes\n",
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size);
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return AVERROR_INVALIDDATA;
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}
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/* header */
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avio_wb16(s->pb, SUP_PGS_MAGIC);
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avio_wb32(s->pb, pts);
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avio_wb32(s->pb, dts);
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avio_write(s->pb, data, len);
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data += len;
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size -= len;
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}
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if (size > 0) {
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av_log(s, AV_LOG_ERROR, "Skipping %"SIZE_SPECIFIER" bytes after last segment in frame\n",
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size);
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return AVERROR_INVALIDDATA;
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}
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return 0;
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}
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static int sup_write_header(AVFormatContext *s)
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{
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avpriv_set_pts_info(s->streams[0], 32, 1, 90000);
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return 0;
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}
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const FFOutputFormat ff_sup_muxer = {
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.p.name = "sup",
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.p.long_name = NULL_IF_CONFIG_SMALL("raw HDMV Presentation Graphic Stream subtitles"),
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.p.extensions = "sup",
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.p.mime_type = "application/x-pgs",
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.p.video_codec = AV_CODEC_ID_NONE,
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.p.audio_codec = AV_CODEC_ID_NONE,
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.p.subtitle_codec = AV_CODEC_ID_HDMV_PGS_SUBTITLE,
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.p.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT,
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.flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH,
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.write_header = sup_write_header,
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.write_packet = sup_write_packet,
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};
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