TDA2HG: [TDA2HG-IHA-Decoder] the memory shared within gstreamer plugin

user5312037

Part Number: TDA2HG

we are using gstreamer to decode mp4 file and send decoded yuv data to another process ,but ddr bandwidth almost have run out. so we need a way without memory copy. gstreamer pipeline is as follows.

gst-launch-1.0 -e filesrc location=test.mp4 ! qtdemux ! h264parse ! ducatih264dec ! videoshmsink

videoshmsink is our customized sink which send data to another process. the data is transmitted through cmem(in videoshmsink) and mmap(in another process) with memory copy.
Is there a way to do it without memory copy to send data to another process from videoshmsink?

over 4 years ago

0 Gaviraju Doddabettahalli Bettegowda over 4 years ago

TI__Genius 14305 points

Hi,

We are not using any memcpy operation in our TI plugins & we are using dmabuf to avoid memcpy. Kmssink and waylandsink takes buffers from Ducati as dmabuf , so no memcpy happens there.

So implement the same in your custom plugin.

Thanks

Gaviraju

0 li you over 4 years ago in reply to Gaviraju Doddabettahalli Bettegowda

Prodigy 10 points

Hi,

Thanks for reply,but the yuv data is not displayed in gstreamer pipeline,displayed in another qt program.Is there any way to transfer dmbuf to another process？。

Thanks

0 Gaviraju Doddabettahalli Bettegowda over 4 years ago in reply to li you

TI__Genius 14305 points

Hi,

I think it's possible to use the dmabuf fd in another process & we need to use IPC to transfer the dmabuf fd to another process.

Note: As we know kmssink & waylandsink are open source & by default dmabuf fd is not supported, so we applying some patches to support this feature. recommending go through those patches once. (These patch files are available in the yocto build setup).

Thanks

Gaviraju

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TDA2HG: [TDA2HG-IHA-Decoder] the memory shared within gstreamer plugin