2.2.4.4.2 RDPGFX_AVC420_QUANT_QUALITY
The RDPGFX_AVC420_QUANT_QUALITY structure describes the quantization parameter and quality level associated with a rectangular region.
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qpVal |
qualityVal |
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qpVal (1 byte): An 8-bit unsigned integer that specifies the progressive indicator and quantization parameter associated with a rectangular region. The format of the qpVal field is described by the following bitmask diagram.
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1qp
r
p
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qp (6 bits): A 6-bit, unsigned integer that that specifies the quantization parameter associated with a rectangular region. This value MUST be in the range required by [ITU-H.264-201201] sections 7.4.2.1.1 and 7.4.3 for high profiles ([ITU-H.264-201201] section A.2.4).
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r (1 bit): A 1-bit field that is reserved for future use. This field SHOULD be set to zero.
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p (1 bit): A 1-bit field that indicates whether a rectangular region is progressively encoded. A value of 0x1 indicates that the region is progressively encoded.
qualityVal (1 byte): An 8-bit unsigned integer that specifies the quality level associated with a rectangular region. This value MUST be in the range 0 to 100 inclusive.