Tool/software:
In the TDA4VH 11.00 SDK, we observe that in the makefile file, when the image_preprocess node is running on C7X, the default compiled file is vx_image_preprocessing_target_no_dma.c.
We attempted to forcibly modify the makefile file, but the time consumed by image_preprocess was reduced, but the output result was incorrect. As shown in the figure below：
The output image is as follows：
1、The demo program we developed ourselves has verified that it is possible to convert NV12 to RGB.
2、We verified that the "image_preprocess" node without DMA was able to produce correct RGB results, but the DMA operation failed.
3、The bin file stores NV12 data. We can view it using yuvplayer. The size is 1920 x 1536.
4、I encountered a macro definition error. I only made the modification here in the entire file.
Hi,
Hi,
While reviewing the vx_image_preprocessing_target code, I noticed that it is written for C6x architecture, not for C7x.
To use vx_image_preprocessing_target on C7x, you need to configure the DMA and other memory settings accordingly.
Attached is the dataflow diagram for Object Detection.
The preprocessing step, which was previously handled by C6x, is now performed by C7x. The no_dma code contains a natural C implementation of the same, which runs on the C7x.
Regards,
Sivadeep
