Add jriver media centre as a config generation target

[3ll3d00d]

MC v27.0.46 adds load/save dsp config from a file format which is some custom internal format containing fragments of XML

the outer DSP Studio block is of the form

<Key Name="Parametric Equalizer">
    <Data>
        <Name>Filters</Name>
        <Value>(1:1)(1:COUNT)FILTERS</Value>
    </Data>
    <Data>
        <Name>Enabled</Name>
        <Value>0</Value>
    </Data>
</Key>

where

COUNT = the no of filters
FILTERS = 1 block per filter of the form

(BYTES:FILTER_XML)

where

BYTES = no of bytes in FILTER_XML + 1
FILTER_XML = escaped xml definition of the filter

e.g.

(238:<XMLPH version="1.1">
<Item Name="Enabled">1</Item>
<Item Name="Slope">12</Item>
<Item Name="Q">0</Item>
<Item Name="Type">3</Item>
<Item Name="Gain">0</Item>
<Item Name="Frequency">0</Item>
<Item Name="Channels">2</Item>
</XMLPH>)

content varies per filter type, required types are just peaking EQ and shelf filters which require

text divider

Enabled = 1
Type = 20
Text

PEQ/LS/HS

Enabled = 1
Slope = 12 
Q  (NB: set value to S for shelf filter)
Type 
    PEQ = 3
    LS = 10
    HS = 11
Gain
Frequency
Channels

gain

Enabled = 1
Type = 4
Gain
Channels

Channels is a ; separated list of channel numbers

Mains = 2 - 9
U1/2 = 11 - 12
9 - 32 = 13 - 36

User needs to choose where to write the filters (PEQ or PEQ2) and which channels to apply the filter to

Default values should be PEQ2 (assumes post BM BEQ) and 5 (assumes standard SW out)