Le lundi 09 septembre 2024 à 19:25 +0000, Jonas Karlman a écrit :
> The VIDIOC_ENUM_FRAMESIZES ioctl should return all frame sizes (i. e.
> width and height in pixels) that the device supports for the given pixel
> format.
>
> For coded format returning the frame size used to enforce HW alignment
> requirements for CAPTURE buffers does not make fully sense.
>
> Instead, signal applications what the maximum frame size that is
> supported by the HW decoder using a frame size of continuous type.
>
> Fixes: cd33c830448b ("media: rkvdec: Add the rkvdec driver")
> Suggested-by: Alex Bee <knaerzche@xxxxxxxxx>
> Signed-off-by: Jonas Karlman <jonas@xxxxxxxxx>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@xxxxxxxxxxxxx>
> ---
> v6:
> - New patch
>
> With this change FFmpeg V4L2 Request API hwaccels can implement a strict
> check if frame size is supported by the video device:
> https://ffmpeg.org/pipermail/ffmpeg-devel/2024-August/332037.html
> ---
> drivers/staging/media/rkvdec/rkvdec.c | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c
> index c8c14f35ac44..9002eb3a59e5 100644
> --- a/drivers/staging/media/rkvdec/rkvdec.c
> +++ b/drivers/staging/media/rkvdec/rkvdec.c
> @@ -334,8 +334,14 @@ static int rkvdec_enum_framesizes(struct file *file, void *priv,
> if (!fmt)
> return -EINVAL;
>
> - fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
> - fsize->stepwise = fmt->frmsize;
> + fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
> + fsize->stepwise.min_width = 1;
> + fsize->stepwise.max_width = fmt->frmsize.max_width;
> + fsize->stepwise.step_width = 1;
> + fsize->stepwise.min_height = 1;
> + fsize->stepwise.max_height = fmt->frmsize.max_height;
> + fsize->stepwise.step_height = 1;
> +
> return 0;
> }
>
