Add SUP/PGS subtitle muxer

Fixes ticket #2208

Changelog

@@ -44,6 +44,7 @@ version <next>:
 - drop deprecated qtkit input device (use avfoundation instead)
 - despill video filter
 - haas audio filter
+- SUP/PGS subtitle muxer
 
 version 3.3:
 - CrystalHD decoder moved to new decode API

doc/general.texi

@@ -530,7 +530,7 @@ library:
 @item Sony Wave64 (W64)         @tab X @tab X
 @item SoX native format         @tab X @tab X
 @item SUN AU format             @tab X @tab X
-@item SUP raw PGS subtitles     @tab   @tab X
+@item SUP raw PGS subtitles     @tab X @tab X
 @item SVAG                      @tab   @tab X
     @tab Audio format used in Konami PS2 games.
 @item TDSC                      @tab   @tab X

libavformat/Makefile

@@ -474,6 +474,7 @@ OBJS-$(CONFIG_STR_DEMUXER)               += psxstr.o
 OBJS-$(CONFIG_SUBVIEWER1_DEMUXER)        += subviewer1dec.o subtitles.o
 OBJS-$(CONFIG_SUBVIEWER_DEMUXER)         += subviewerdec.o subtitles.o
 OBJS-$(CONFIG_SUP_DEMUXER)               += supdec.o
+OBJS-$(CONFIG_SUP_MUXER)                 += supenc.o
 OBJS-$(CONFIG_SVAG_DEMUXER)              += svag.o
 OBJS-$(CONFIG_SWF_DEMUXER)               += swfdec.o swf.o
 OBJS-$(CONFIG_SWF_MUXER)                 += swfenc.o swf.o

libavformat/allformats.c

@@ -303,7 +303,7 @@ static void register_all(void)
     REGISTER_DEMUXER (STL,              stl);
     REGISTER_DEMUXER (SUBVIEWER1,       subviewer1);
     REGISTER_DEMUXER (SUBVIEWER,        subviewer);
-    REGISTER_DEMUXER (SUP,              sup);
+    REGISTER_MUXDEMUX(SUP,              sup);
     REGISTER_DEMUXER (SVAG,             svag);
     REGISTER_MUXDEMUX(SWF,              swf);
     REGISTER_DEMUXER (TAK,              tak);

libavformat/supenc.c

@@ -0,0 +1,96 @@
+/*
+ * SUP muxer
+ * Copyright (c) 2014 Petri Hintukainen <phintuka@users.sourceforge.net>
+ *
+ * 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 "avformat.h"
+#include "internal.h"
+#include "libavutil/intreadwrite.h"
+
+#define SUP_PGS_MAGIC 0x5047 /* "PG", big endian */
+
+static int sup_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    uint8_t *data = pkt->data;
+    size_t size = pkt->size;
+    uint32_t pts = 0, dts = 0;
+
+    if (pkt->pts != AV_NOPTS_VALUE) {
+        pts = (uint32_t)pkt->pts;
+    }
+    if (pkt->dts != AV_NOPTS_VALUE) {
+        dts = (uint32_t)pkt->dts;
+    }
+
+    /*
+      Split frame to segments.
+      mkvmerge stores multiple segments in one frame.
+    */
+    while (size > 2) {
+        size_t len = AV_RB16(data + 1) + 3;
+
+        if (len > size) {
+            av_log(s, AV_LOG_ERROR, "Not enough data, skipping %d bytes\n",
+                     (int)size);
+            return AVERROR_INVALIDDATA;
+        }
+
+        /* header */
+        avio_wb16(s->pb, SUP_PGS_MAGIC);
+        avio_wb32(s->pb, pts);
+        avio_wb32(s->pb, dts);
+
+        avio_write(s->pb, data, len);
+
+        data += len;
+        size -= len;
+    }
+
+    if (size > 0) {
+        av_log(s, AV_LOG_ERROR, "Skipping %d bytes after last segment in frame\n",
+                 (int)size);
+        return AVERROR_INVALIDDATA;
+    }
+
+    return 0;
+}
+
+static int sup_write_header(AVFormatContext *s)
+{
+    if (s->nb_streams != 1) {
+        av_log(s, AV_LOG_ERROR, "%s files have exactly one stream\n",
+               s->oformat->name);
+        return AVERROR(EINVAL);
+    }
+
+    avpriv_set_pts_info(s->streams[0], 32, 1, 90000);
+
+    return 0;
+}
+
+AVOutputFormat ff_sup_muxer = {
+    .name           = "sup",
+    .long_name      = NULL_IF_CONFIG_SMALL("raw HDMV Presentation Graphic Stream subtitles"),
+    .extensions     = "sup",
+    .mime_type      = "application/x-pgs",
+    .subtitle_codec = AV_CODEC_ID_HDMV_PGS_SUBTITLE,
+    .write_header   = sup_write_header,
+    .write_packet   = sup_write_packet,
+    .flags          = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT,
+};

libavformat/version.h

@@ -32,7 +32,7 @@
 // Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
 // Also please add any ticket numbers that you believe might be affected here
 #define LIBAVFORMAT_VERSION_MAJOR  57
-#define LIBAVFORMAT_VERSION_MINOR  81
+#define LIBAVFORMAT_VERSION_MINOR  82
 #define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \