[libcamera-devel] [PATCH v4 3/7] tests: delayed_controls: Add cookie value test

[Kieran Bingham]

Quoting Naushir Patuck via libcamera-devel (2022-10-19 10:01:03)
> Add a test for passing and returning cookie values in DelayedControls.
> 
> Signed-off-by: Naushir Patuck <naush at raspberrypi.com>
> Reviewed-by: David Plowman <david.plowman at raspberrypi.com>
> ---
>  test/delayed_controls.cpp | 44 +++++++++++++++++++++++++++++++++++++++
>  1 file changed, 44 insertions(+)
> 
> diff --git a/test/delayed_controls.cpp b/test/delayed_controls.cpp
> index 322c545998b2..5cc7d3aed4fd 100644
> --- a/test/delayed_controls.cpp
> +++ b/test/delayed_controls.cpp
> @@ -267,6 +267,45 @@ protected:
>                 return TestPass;
>         }
>  
> +       int cookieValue()
> +       {
> +               std::unordered_map<uint32_t, DelayedControls::ControlParams> delays = {
> +                       { V4L2_CID_BRIGHTNESS, { 1, false } },
> +               };
> +               std::unique_ptr<DelayedControls> delayed =
> +                       std::make_unique<DelayedControls>(dev_.get(), delays);
> +               ControlList ctrls;
> +
> +               /* Set a cookie to the reset value. */
> +               const unsigned int startCookie = 0x1234;
> +               ctrls.set(V4L2_CID_BRIGHTNESS, 1);
> +               dev_->setControls(&ctrls);
> +               delayed->reset(startCookie);
> +
> +               /* Trigger the first frame start event */
> +               delayed->applyControls(0);
> +
> +               for (unsigned int i = 1; i < 100; i++) {
> +                       ctrls.set(V4L2_CID_BRIGHTNESS, 1);
> +                       delayed->push(ctrls, startCookie + i);
> +
> +                       delayed->applyControls(i);

The interesting part might be what happens in the event that the pushs
and the applyControls() get out of sync. I think there's something that
internally propogates to push another set of controls on or such ?

Does that just propogate the cookie forwards from the previous one too?



> +
> +                       auto [result, cookie] = delayed->get(i);
> +                       unsigned int expected = startCookie + i - 1;
> +                       if (cookie != expected) {
> +                               cerr << "Failed cookie value"
> +                                    << " frame " << i
> +                                    << " expected cookie " << expected
> +                                    << " got cookie " << cookie
> +                                    << endl;
> +                               return TestFail;
> +                       }
> +               }
> +
> +               return TestPass;
> +       }
> +
>         int run() override
>         {
>                 int ret;
> @@ -291,6 +330,11 @@ protected:
>                 if (ret)
>                         return ret;
>  
> +               /* Test cookie values. */
> +               ret = cookieValue();
> +               if (ret)
> +                       return ret;
> +
>                 return TestPass;
>         }
>  
> -- 
> 2.25.1
>