Decoder Buffer Requirements - 1.0 English

H.264/H.265 Video Decode Unit Solutions LogiCORE IP Product Guide (PG414)

Document ID
PG414
Release Date
2022-07-08
Version
1.0 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
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: It is not possible to reduce the output buffer requirements because the VDU uses multiple internal decoder engines.