Adding some fixes to MMT code

[trollcop]

Heya,

I'm using this to go through some TLV/MMT files and I noticed a bug in the code which skips MPT_descriptors, you do bs.Read(&std::vector) but it's size remains at zero, causing a crash. I guess your sample MMT files didn't have such descriptors, so you didn't notice.

That's commit #1, and second one adds support for --pid to go up to 0xffff (mmt can have PIDs above 1fff since the field is 16bit there). I haven't tested it but it should work.

Anyway, there's some issues still as the

DumpTS.exe input.tlv --srcfmt=mmt --output=output.hevc --outputfmt=es --pid=0xa041

Exits after unsynching with 7F header after few 100kbytes, but that's to be determined with further debugging (my source file should be clean).

[wangf1978]

Thanks.

0x1fff is NULL packet for TS stream, it is invalid for MMT.

[trollcop]

0x1fff is NULL packet for TS stream, it is invalid for MMT.

Yes, but what I mean is that MMT PIDs are 16bit, where TS PIDs are 12bit. So pid such as 0xa000 is valid for MMT, and --pid should not have been limited to 12-bit.

[wangf1978]

Yes, you are right, I have merged your changes. Thanks for your contribution.