[mythtv] This piece of code is driving me nuts!

[roger]

On 18/11/16 19:31, Gary Buhrmaster wrote:
> On Fri, Nov 18, 2016 at 5:53 PM, roger <roger at beardandsandals.co.uk> wrote:
>> This piece of code in mpgestreamdata.cpp is driving me nuts.
> I suspect that you have not looked at the implementation
> of a Qt vector resize method, which only sets values for
> new elements.  So, from quick look, it sets the initial
> (0-31, depending on endz) elements to 0x00, and than
> the rest (to 32) to 0xff.
>
> Or maybe I am as confused as you are.
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Hi Gary,

Unfortunately, sections_t is a std::vector not Qt QVector.

However, I have got a bit further.

I worked out the number. Start off with 0xff and zeroise bits starting 
from the least significant.

11111110 0xfe
11111110 0xfc
11111000 0xf8
11110000 0xf0
11100000 0xe0
11000000 0xc0
10000000 0x80
00000000 0x00

I still think the extra resize is a red herring.

So I assume you knock out the bits of the whole array as sections are 
received. When they are all zeroed you have a complete table. Only 
problem is this does not work  for segmented DVB tables such as the EIT 
schedule table, because they can have gaps in them.

Roger