tsdemux: Adds support for ARIB subtitles

Submitted by Andreea Fulger

Link to original bug (#729244)

Description

Created attachment 275469
Adds support for ARIB subtitles

In ISDB streams, subtitles are sent as private data and according to ISDB ARIB B10 v4.6 the corresponding descriptor is 0xfd (Data Component descriptor), which has been omitted in GstMpegTsISDBDescriptorType.

Here is a patch that adds the support for ARIB subtitles only (described in ARIB STD-B24 v5.2) - once the stream corresponding to the ISDB Data Component Descriptor is identified, we must see in the descriptor's data if the data component id is either 0x0008 - ARIB-Subtitle & teletext coding or 0X0012 - Subtitle coding for digital terrestrial broadcasting (C profile).

I thus added a new mime-type "application/x-arib".

Patch 275469, "Adds support for ARIB subtitles":
0001-DEV-tsdemux-Adds-the-support-for-ARIB-subtitles.patch