This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.
## Frame Info exported from libAVC
### Introduction
QP and block type maps for H264 are defined for each 8x8 MB sub-block.
The QP values defined as unsigned 8-bit numbers can range from <0,51> and the block type can
be INTER/INTRA/SKIP. Set the “u4_frame_info_enable” flag to enable encoder/decoder to populate
and return the qp values and block type data in their output structures ih264e_video_encode_op_t
and ih264d_video_decode_op_t respectively via pu1_8x8_blk_qp_map and pu1_8x8_blk_type_map.
### Mapping to the frame
Let’s say, a frame has a total of ‘n’ MBs (each 16x16). Since the QP and block type are defined
for each 8x8 block, hence each MB will have 4 entries in the maps. Thus, a total of n x 4 entries
for each frame. Qp and block type values for each 8x8 block are stored in raster scan order. Refer
to ih264d.h for details.
### Plugin/Application
The encoder/decoder keeps the QP and block type map as a part of its output handle. The plugins can