Decoder Buffer Requirements - 2023.1 English

H.264/H.265 Video Codec Unit v1.2 Solutions LogiCORE IP Product Guide (PG252)

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2023.1 English

The Decoder input and output requirements are shown in the following table.

Table 1. Decoder Buffer Requirements
Requirement Description
Input Buffer
Number of Buffers >=1
Contiguous No
Alignment 0
Size Any > 0
Output Buffer
Number of Buffers For AVC: AL_AVC_GetMinOutputBuffersNeeded (AL_TStreamSettings tStreamSettings, int iStack).

For HEVC: AL_HEVC_GetMinOutputBuffersNeeded (AL_TStreamSettings tStreamSettings, int iStack).

Note: Dimension, chroma-mode and bit-depth are in stream-settings.
Contiguous Yes
Alignment 32
Size stride * slice-height * chroma-mode.
Note: stride and slice-height should be 64-aligned.
Note: Because the VCU uses multiple internal decoder engines, it is not possible to reduce the output buffer requirements.