display

pls refer to DVRRDK_02.80.00.10/dvr_rdk/mcfw/src_linux/mcfw_api/usecases/multich_vdec_vdis.c for a example first.  You can modify from this case to fit your need.

Hi.

I have refered to the usecase. But it used dupLink to connect 2 swLink and then had two ID.

But the dup Link is not duplicate 1 channel to 2 channel? The 2 channel is same, right?

I need to 2 different streamings in different display.

SwMS link creates a mosaic of multiple input channels and generates single mosaic output.

If you want two different outputs one going to display 0 & another going to display 1, you need to have 2 swMS link.

So, use dup after IpcInVpss & have 2 instances of SwMS each serving to one display.

Also, please migrate to latest DVR RDK release if you are starting new. 2.8 is a old version with no active support.

Supporting different channels on two displays is already supported by default in the decode display demo.No changes are required

A single decode link supports decode of multiple channels. So data flow for 2 channel case is

ipcBitsOutHLOS (ch0,ch1) --> decLink (ch0,ch1) --> ipcInVpssM3 (ch0,ch1) --> dup -- (ch0, ch1) --> Swms0 (Selected Layout --> display 0

                                                                                                                                         (ch0,ch1)  --> Swms1 (Selected Layout) --> display 1

To select 1x1 layout with different channels on display 0 and display 1 use the following demo options:

1. Display Settings -> Switch Layout --> Select 1x1 layout

2. Display Setting -> Switch Channel -> Select ch0 for HDMI

                                                                Select ch1 for DVO2

Hi,

I use IpcInVpss->dup->swMS[0], swMS[1]->display[0],display[1];

but I found swMS[0] and swMS[1] all had 2 same channel.

How can I make swMS[0] can only send the first channel to display[0], swMS[1] can only send the second channel to display[1]?

Thanks very much.

I already answered this in the above post. You can to select the correct channel to window mapping to display the required channel in SwMs.Did you try the sequence I mentioned.

Hi, Badri,

When I write the above post, I can not see your post. Now I am trying with your advice.

thanks very much.

Hi, Badri.

If VOUT0 display channel0, VOUT1 display channel1, now I want to set VOUT0 display channel1, so I use SwitchChn(0,1) and it can successfully display.

But I am not very clear about how the decode output data is associated with the display input data.

That if I use SwitchChn, how does the display know where it should get the decoded data?

Thanks very much.

As I explained in my previous post below is data flow.

ipcBitsOutHLOS (ch0,ch1) --> decLink (ch0,ch1) --> ipcInVpssM3 (ch0,ch1) --> dup -- (ch0, ch1) --> Swms0 (Selected Layout --> display 0

                                                                                                                                         (ch0,ch1)  --> Swms1 (Selected Layout) --> display 1

Decode Channel 0 == Display Channel 0.

Decode Channel 1 == Display Channel 1

Each frame sent from one link to another link has the channel number associated with the frame. The SwMs maps the input channel number to display window number .

Hi, Badri. Thanks very much for your reply.

There have another problems.

1.  If I select Layout_mode_1CH, it does not do scaling, right? Or  it firstly dose down-sampling and then up-sampling?

2. In the usecase cap-venc-dis, the ipcOutVpssPrm.notifyNextLink = FALSE; and the notifyNextLink of  other Link will TURE.

If the notifyNextLink is FALSE, how the next Link can get the new data?

Hi, Badri.

How about noNotifyMode is set to FALSE?