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2.2.7.2.10.1.1 Bitmap Codec (TS_BITMAPCODEC)

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The TS_BITMAPCODEC structure is used to describe the encoding parameters of a bitmap codec.


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codecGUID (16 bytes)

...

...

codecID

codecPropertiesLength

codecProperties (variable)

...

codecGUID (16 bytes): A Globally Unique Identifier (section 2.2.7.2.10.1.1.1) that functions as a unique ID for each bitmap codec.

Value

Meaning

CODEC_GUID_NSCODEC

{0xCA8D1BB9, 0x000F, 0x154F, 0x58, 0x9F, 0xAE, 0x2D, 0x1A, 0x87, 0xE2, 0xD6}

The Bitmap Codec structure defines encoding parameters for the NSCodec Bitmap Codec ([MS-RDPNSC] sections 2 and 3). The codecProperties field MUST contain an NSCodec Capability Set ([MS-RDPNSC] section 2.2.1) structure.

CODEC_GUID_REMOTEFX

{0x76772F12, 0xBD72, 0x4463, 0xAF, 0xB3, 0xB7, 0x3C, 0x9C, 0x6F, 0x78, 0x86}

The Bitmap Codec structure defines encoding parameters for the RemoteFX Bitmap Codec ([MS-RDPRFX] sections 2 and 3). The codecProperties field MUST contain a TS_RFX_CLNT_CAPS_CONTAINER ([MS-RDPRFX] section 2.2.1.1) structure or a TS_RFX_SRVR_CAPS_CONTAINER ([MS-RDPRFX] section 2.2.1.2) structure.

CODEC_GUID_IMAGE_REMOTEFX

{0x2744CCD4, 0x9D8A, 0x4E74, 0x80, 0x3C, 0x0E, 0xCB, 0xEE, 0xA1, 0x9C, 0x54}

The Bitmap Codec structure defines encoding parameters for the RemoteFX Bitmap Codec ([MS-RDPRFX] sections 2 and 3) operating in image mode ([MS-RDPRFX] section 2.2.1.1.1.1). The codecProperties field MUST contain a TS_RFX_CLNT_CAPS_CONTAINER ([MS-RDPRFX] section 2.2.1.1) structure or a TS_RFX_SRVR_CAPS_CONTAINER ([MS-RDPRFX] section 2.2.1.2) structure.<31>

CODEC_GUID_IGNORE

{0x9C4351A6, 0x3535, 0x42AE, 0x91, 0x0C, 0xCD, 0xFC, 0xE5, 0x76, 0x0B, 0x58}

The Bitmap Codec structure MUST be ignored.

codecID (1 byte): An 8-bit unsigned integer. When sent from the client to the server, this field contains a unique 8-bit ID that can be used to identify bitmap data encoded using the codec in wire traffic associated with the current connection - this ID is used in subsequent Set Surface Bits commands (section 2.2.9.2.1) and Cache Bitmap (Revision 3) orders ([MS-RDPEGDI] section 2.2.2.2.1.2.8). When sent from the server to the client, the value in this field is ignored by the client - the client determines the 8-bit ID to use for the codec. If the codecGUID field contains the CODEC_GUID_NSCODEC GUID, then this field MUST be set to 0x01 (the codec ID 0x01 MUST NOT be associated with any other bitmap codec).

codecPropertiesLength (2 bytes): A 16-bit, unsigned integer. The size in bytes of the codecProperties field.

codecProperties (variable): A variable-length array of bytes containing data that describes the encoding parameter of the bitmap codec. If the codecGUID field is set to CODEC_GUID_NSCODEC, this field MUST contain an NSCodec Capability Set ([MS-RDPNSC] section 2.2.1) structure. Otherwise, if the codecGUID field is set to CODEC_GUID_REMOTEFX, this field MUST contain a TS_RFX_CLNT_CAPS_CONTAINER ([MS-RDPRFX] section 2.2.1.1) structure when sent from client to server, and a TS_RFX_SRVR_CAPS_CONTAINER ([MS-RDPRFX] section 2.2.1.2) structure when sent from server to client.