2.2.4.4 RFX_AVC420_BITMAP_STREAM
The RFX_AVC420_BITMAP_STREAM structure encapsulates regions of a graphics frame compressed using the MPEG-4 AVC/H.264 codec in YUV420p mode (as specified in [ITU-H.264-201201]) and conforming to the byte stream format specified in [ITU-H.264-201201] Annex B. The data compressed using these techniques is transported in the bitmapData field of the RD PGFX_WIRE_TO_SURFACE_PDU_1 (section 2.2.2.1) message or encapsulated in the RFX_AVC444_BITMAP_STREAM structure (section 2.2.4.5) or the RFX_AVC444V2_BITMAP_STREAM structure (section 2.2.4.6).
Note that the width and height of the MPEG-4 AVC/H.264 codec bitstream MUST be aligned to a multiple of 16 and MUST be cropped by the region mask specified in the regionRects field that is embedded in the avc420MetaData field.
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avc420MetaData (variable) |
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avc420EncodedBitstream (variable) |
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avc420MetaData (variable): A variable-length RFX_AVC420_METABLOCK (section 2.2.4.4.1) structure.
avc420EncodedBitstream (variable): An array of bytes that represents a single frame encoded using the MPEG-4 AVC/H.264 codec in YUV420p mode (as specified in [ITU-H.264-201201]) and conforming to the byte stream format specified in [ITU-H.264-201201] Annex B. Color conversion is described in section 3.3.8.3.1.