Re: [mythtv] DVB service types

Rudy Zijlstra Sun, 04 Dec 2005 02:08:11 -0800

Rudy Zijlstra wrote:

Stuart, Daniel,

DVB has added the following service types which would be interesting to support in MythTv:

- 0x11 - MPEG2 HD Television Service
- 0x16 - Advanced Codec SD Television service
- 0x19 - Advanced Codec HD Television service

For Radio were added:
- 0x0A - Advanced Codec digital radio sound service

For TV any DVB reference to Advanced Codec must be read as a reference to H.264.

In Europe SAT broadcasts using type 0x19 have started (at least on Astra 19.2). It would be interesting to experiment with them.

Cheers,

Rudy

Looking at some code, i suspect the only changes needed are those listed below:

793    // The stream type can be detected in two ways:
794 // - by stream type field in PMT, if known
795 // - by a descriptor
796 switch (e.Orig_Type)
797 {
798 case 0x01:
799 e.Type = ES_TYPE_VIDEO_MPEG1;
800 break;
801 case 0x80: // OpenCable Mpeg2
802 case 0x02: // DVB/ATSC Mpeg2
                   case 0x11: // DVB MPEG2 HD
803 e.Type = ES_TYPE_VIDEO_MPEG2;
804 break;
805 case 0x03:
806 e.Type = ES_TYPE_AUDIO_MPEG1;
807 break;
808 case 0x04:
809 e.Type = ES_TYPE_AUDIO_MPEG2;
810 break;
811 case 0x08:
812 case 0x0B:
813 e.Type = ES_TYPE_DATA;
814 break;
                   case 0x0A: // DVB Advanced Codec digital radio sound service
815 case 0x0F:
816 e.Type = ES_TYPE_AUDIO_AAC;
817 break;
                   case 0x16: // DVB H.264 SD TV
                   case 0x19: // DVB H.264 HD TV
                        e.Type = ES_TYPE_VIDEO_H264;
                        break;
818 case 0x81:
819 // Where ATSC Puts the AC3 Descriptor
820 e.Type = ES_TYPE_AUDIO_AC3;
821 break;
822
823 }

Followed by:

891 switch (e.Type)
892 {
893 case ES_TYPE_VIDEO_MPEG1:
894 e.Description = QString("MPEG-1 Video");
895 p.hasVideo = true;
896 break;
897 case ES_TYPE_VIDEO_MPEG2:
898 e.Description = QString("MPEG-2 Video");
899 p.hasVideo = true;
900 break;
                   case ES_TYPE_VIDEO_H264;
                        e.Description = QString("MPEG4 H.264 Video");
                        p.hasVideo = true;
                        break;
901 case ES_TYPE_AUDIO_MPEG1:
902 e.Description = QString("MPEG-1 Audio");
903 p.hasAudio = true;
904 break;
905 case ES_TYPE_AUDIO_MPEG2:
906 e.Description = QString("MPEG-2 Audio");
907 p.hasAudio = true;
908 break;
909 case ES_TYPE_AUDIO_AC3:
910 e.Description = QString("AC3 Audio");
911 p.hasAudio = true;
912 break;
913 case ES_TYPE_AUDIO_DTS:
914 e.Description = QString("DTS Audio");
915 p.hasAudio = true;
916 break;
917 case ES_TYPE_AUDIO_AAC:
918 e.Description = QString("AAC Audio");
919 p.hasAudio = true;
920 break;
921 case ES_TYPE_TELETEXT:
922 e.Description = QString("Teletext");
923 break;
924 case ES_TYPE_SUBTITLE:
925 e.Description = QString("Subtitle");
926 break;
927 case ES_TYPE_DATA:
928 e.Description = QString("Data");
929 break;
930 default:
931 e.Description = QString("Unknown type: %1").arg(e.Orig_Type);
932 break;
933 }

I've started ordering components to build a test system. Considering the usage pattern in the home, i cannot afford to disturb the production mythtv... Would greatly lower the FAF!
So this change is without any testing.

some remarks:
- the ES_TYPE_VIDEO_MPEG4 type is a funny one because of the MPEG4 standard. H.264 is part 10 of the MPEG4 standard. It might be interesting to subdivide all the different parts into their own type definition.
- DVB uses the term Advanced Codec in the (draft versions) of the standard. It always refers to H.264.
- These added type definitions were taken from the latest DVB meeting, and are unlikely to change. Also because broadcast using them has started.
- I've not added the NVOD service type definitions.

Cheers,

Rudy

_______________________________________________
mythtv-dev mailing list
[email protected]
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-dev

Re: [mythtv] DVB service types

Reply via email to