2.2.1 NSCodec Capability Set (TS_NSCODEC_CAPABILITYSET)
The TS_NSCODEC_CAPABILITYSET structure advertises properties of the NSCodec Bitmap Codec. This capability set is encapsulated in the codecProperties field of the Bitmap Codec ([MS-RDPBCGR] section 2.2.7.2.10.1.1) structure, which is ultimately encapsulated in the Bitmap Codecs Capability Set ([MS-RDPBCGR] section 2.2.7.2.10), which is encapsulated in a server-to-client Demand Active PDU ([MS-RDPBCGR] section 2.2.1.13.1) or client-to-server Confirm Active PDU ([MS-RDPBCGR] section 2.2.1.13.2).
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fAllowDynamicFidelity |
fAllowSubsampling |
colorLossLevel |
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fAllowDynamicFidelity (1 byte): An 8-bit unsigned integer that indicates support for lossy bitmap compression by reducing color fidelity ([MS-RDPEGDI] section 3.1.9.1.4).
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Value
Meaning
FALSE
0x00
Lossy compression is not supported.
TRUE
0x01
Lossy compression is supported.
fAllowSubsampling (1 byte): An 8-bit unsigned integer that indicates support for chroma subsampling ([MS-RDPEGDI] section 3.1.9.1.3).
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Value
Meaning
FALSE
0x00
Chroma subsampling is not supported.
TRUE
0x01
Chroma subsampling is supported.
colorLossLevel (1 byte): An 8-bit unsigned integer that indicates the maximum supported Color Loss Level ([MS-RDPEGDI] section 3.1.9.1.4). This value MUST be between 1 and 7 (inclusive).