mpegts: demux BluRay text subtitles

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/avcodec.h

@@ -530,6 +530,7 @@ enum AVCodecID {
     AV_CODEC_ID_VPLAYER    = MKBETAG('V','P','l','r'),
     AV_CODEC_ID_PJS        = MKBETAG('P','h','J','S'),
     AV_CODEC_ID_ASS        = MKBETAG('A','S','S',' '),  ///< ASS as defined in Matroska
+    AV_CODEC_ID_HDMV_TEXT_SUBTITLE = MKBETAG('B','D','T','X'),
 
     /* other specific kind of codecs (generally used for attachments) */
     AV_CODEC_ID_FIRST_UNKNOWN = 0x18000,           ///< A dummy ID pointing at the start of various fake codecs.

libavcodec/codec_desc.c

@@ -2735,6 +2735,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .long_name = NULL_IF_CONFIG_SMALL("WebVTT subtitle"),
         .props     = AV_CODEC_PROP_TEXT_SUB,
     },
+    {
+        .id        = AV_CODEC_ID_HDMV_TEXT_SUBTITLE,
+        .type      = AVMEDIA_TYPE_SUBTITLE,
+        .name      = "hdmv_text_subtitle",
+        .long_name = NULL_IF_CONFIG_SMALL("HDMV Text subtitle"),
+        .props     = AV_CODEC_PROP_TEXT_SUB,
+    },
 
     /* other kind of codecs and pseudo-codecs */
     {

libavformat/mpegts.c

@@ -718,6 +718,7 @@ static const StreamType HDMV_types[] = {
     { 0xa1, AVMEDIA_TYPE_AUDIO,    AV_CODEC_ID_EAC3              }, /* E-AC3 Secondary Audio */
     { 0xa2, AVMEDIA_TYPE_AUDIO,    AV_CODEC_ID_DTS               }, /* DTS Express Secondary Audio */
     { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
+    { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
     { 0 },
 };