demux: dash: add support for WebVTT

modules/demux/adaptative/Streams.cpp

@@ -89,6 +89,8 @@ StreamType AbstractStream::mimeToType(const std::string &mime)
         mimetype = AUDIO;
     else if (!mime.compare(0, 12, "application/"))
         mimetype = APPLICATION;
+    else if (!mime.compare(0, 5, "text/"))
+        mimetype = SUBTITLE;
     else /* unknown of unsupported */
         mimetype = UNKNOWN;
     return mimetype;

modules/demux/adaptative/StreamsType.hpp

@@ -28,6 +28,7 @@ namespace adaptative
         UNKNOWN = 0,
         VIDEO,
         AUDIO,
+        SUBTITLE,
         APPLICATION
     };
 

modules/demux/dash/DASHStream.cpp

@@ -45,6 +45,10 @@ AbstractDemuxer * DASHStream::createDemux(const StreamFormat &format)
             ret = new Demuxer(p_realdemux, "ts", fakeesout->getEsOut(), demuxersource);
             break;
 
+        case DASHStreamFormat::WEBVTT:
+            ret = new SlaveDemuxer(p_realdemux, "subtitle", fakeesout->getEsOut(), demuxersource);
+            break;
+
         default:
         case StreamFormat::UNSUPPORTED:
             break;

modules/demux/dash/DASHStreamFormat.hpp

@@ -32,6 +32,7 @@ namespace dash
         public:
             static const unsigned MPEG2TS = StreamFormat::UNSUPPORTED + 1;
             static const unsigned MP4    = StreamFormat::UNSUPPORTED + 2;
+            static const unsigned WEBVTT = StreamFormat::UNSUPPORTED + 3;
 
             static StreamFormat mimeToFormat(const std::string &mime)
             {
@@ -43,6 +44,8 @@ namespace dash
                         return StreamFormat(DASHStreamFormat::MP4);
                     else if (tail == "mp2t")
                         return StreamFormat(DASHStreamFormat::MPEG2TS);
+                    else if (tail == "vtt")
+                        return StreamFormat(DASHStreamFormat::WEBVTT);
                 }
                 return StreamFormat();
             }