[libcamera-devel] [PATCH v5 1/6] libcamera: controls: Add sensor test pattern mode

[Hirokazu Honda]

Gentle ping for reviewing this patch series. Thanks in advance.

On Wed, May 19, 2021 at 4:59 PM Hirokazu Honda <hiroh at chromium.org> wrote:

> The control is used to report available sensor test pattern modes
> and also specify the mode to sensor.
>
> Signed-off-by: Hirokazu Honda <hiroh at chromium.org>
> Reviewed-by: Jacopo Mondi <jacopo at jmondi.org>
> ---
>  src/libcamera/control_ids.yaml | 58 ++++++++++++++++++++++++++++++++++
>  1 file changed, 58 insertions(+)
>
> diff --git a/src/libcamera/control_ids.yaml
> b/src/libcamera/control_ids.yaml
> index 88d81ac4..b1fe1dc6 100644
> --- a/src/libcamera/control_ids.yaml
> +++ b/src/libcamera/control_ids.yaml
> @@ -615,4 +615,62 @@ controls:
>          detection, additional format conversions etc) count as an
> additional
>          pipeline stage.
>
> +  - TestPatternMode:
> +      type: int32_t
> +      draft: true
> +      description: |
> +        Control to select the test pattern mode. Currently identical to
> +        ANDROID_SENSOR_TEST_PATTERN_MODE.
> +      enum:
> +        - name: TestPatternModeOff
> +          value: 0
> +          description: |
> +            No test pattern mode is used. The camera device returns
> frames from
> +            the image sensor.
> +        - name: TestPatternModeSolidColor
> +          value: 1
> +          description: |
> +            Each pixel in [R, G_even, G_odd, B] is replaced by its
> respective
> +            color channel provided in test pattern data.
> +            \todo Add control for test pattern data.
> +        - name: TestPatternModeColorBars
> +          value: 2
> +          description: |
> +            All pixel data is replaced with an 8-bar color pattern. The
> vertical
> +            bars (left-to-right) are as follows; white, yellow, cyan,
> green,
> +            magenta, red, blue and black. Each bar should take up 1/8 of
> the
> +            sensor pixel array width. When this is not possible, the bar
> size
> +            should be rounded down to the nearest integer and the pattern
> can
> +            repeat on the right side. Each bar's height must always take
> up the
> +            full sensor pixel array height.
> +        - name: TestPatternModeColorBarsFadeToGray
> +          value: 3
> +          description: |
> +            The test pattern is similar to TestPatternModeColorBars,
> +            except that each bar should start at its specified color at
> the top
> +            and fade to gray at the bottom. Furthermore each bar is
> further
> +            subdevided into a left and right half. The left half should
> have a
> +            smooth gradient, and the right half should have a quantized
> +            gradient. In particular, the right half's should consist of
> blocks
> +            of the same color for 1/16th active sensor pixel array width.
> The
> +            least significant bits in the quantized gradient should be
> copied
> +            from the most significant bits of the smooth gradient. The
> height of
> +            each bar should always be a multiple of 128. When this is not
> the
> +            case, the pattern should repeat at the bottom of the image.
> +        - name: TestPatternModePn9
> +          value: 4
> +          description: |
> +            All pixel data is replaced by a pseudo-random sequence
> generated
> +            from a PN9 512-bit sequence (typically implemented in
> hardware with
> +            a linear feedback shift register). The generator should be
> reset at
> +            the beginning of each frame, and thus each subsequent raw
> frame with
> +            this test pattern should be exactly the same as the last.
> +        - name: TestPatternModeCustom1
> +          value: 5
> +          description: |
> +            The first custom test pattern. All custom patterns that are
> +            available only on this camera device are at least this numeric
> +            value. All of the custom test patterns will be static (that
> is the
> +            raw image must not vary from frame to frame).
> +
>  ...
> --
> 2.31.1.751.gd2f1c929bd-goog
>
>
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