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libtizonia: nBufferSize is not updated on video output port #358

CapOM opened this issue Jul 25, 2017 · 3 comments


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commented Jul 25, 2017

When vp8dprc.c::update_output_port_params calls "tiz_krn_SetParameter_internal" it results that the video output port does not get its nBufferSize updated. Instead only the input port has its nBufferSize recomputed.
Here is the possible cause:

In there is A) tiz_port_apply_slaving_behaviour (p_mos_port, ap_port).
I wonder if it should be B) iz_port_apply_slaving_behaviour (ap_port, p_mos_port) instead of above.

Indeed here it is defined like this:
videoport_apply_slaving_behaviour (void * ap_obj, void * ap_mos_port)
So the order of the param is not the same.

The exact issue is that
nBufferSize gets updated on the input port see "p_base->portdef_.nBufferSize = new_buf_sz;" here
But this value is not reflected back to the output port.

Changing A to B fixes the issue but I guess this is wrong since this is to forward changes from one port to another. But here the nBufferSize is not copied from on port to another. It is computed: "const OMX_U32 new_buf_sz = y_sz + u_sz + v_sz; " so I am confused. Also I am confused because this is done on the bitstream port (ex: input port of a decoder).

Thx in advance for your clarifications !

@juanrubio juanrubio added the bug label Jul 31, 2017

@juanrubio juanrubio added this to the v0.9.0 milestone Jul 31, 2017

@juanrubio juanrubio self-assigned this Jul 31, 2017

@juanrubio juanrubio changed the title nBufferSize not updated on video output port libtizonia: nBufferSize is not updated on video output port Jul 31, 2017


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commented Aug 1, 2017

So in the end we only need:
if (new_buf_sz != p_base->portdef_.nBufferSize && OMX_VIDEO_CodingUnused == p_base->

I tested that changed and it worked but I do not have the fork at the moment so please submit the change, thx a lot!


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commented Aug 1, 2017

@CapOM : changes are committed here 4ef0f66

Could you please review and close this issue if everything looks ok?


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commented Aug 1, 2017

Works. Thx

@CapOM CapOM closed this Aug 1, 2017

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