linux-kernel - Re: [PATCH v3 4/9] [media] vivid: code refactor for color encoding

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Date:	Mon, 18 Jul 2016 10:40:01 +0200
From:	Hans Verkuil <hverkuil@...all.nl>
To:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>,
	Jonathan Corbet <corbet@....net>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Markus Heiser <markus.heiser@...marIT.de>,
	Helen Mae Koike Fornazier <helen.koike@...labora.co.uk>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Antti Palosaari <crope@....fi>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Shuah Khan <shuahkh@....samsung.com>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org
Subject: Re: [PATCH v3 4/9] [media] vivid: code refactor for color encoding

On 07/16/2016 12:41 PM, Ricardo Ribalda Delgado wrote:
> Replace is_yuv with color_enc Which can be used by other
> color encodings such us HSV.
> 
> This change should ease the review of the following patches.
> 
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
> ---
>  drivers/media/common/v4l2-tpg/v4l2-tpg-core.c   | 49 +++++++++++++++--------
>  drivers/media/platform/vivid/vivid-core.h       |  2 +-
>  drivers/media/platform/vivid/vivid-vid-common.c | 52 ++++++++++++-------------
>  include/media/v4l2-tpg.h                        |  7 +++-
>  4 files changed, 66 insertions(+), 44 deletions(-)
> 
> diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> index 3ec3cebe62b9..e8d2bf388597 100644
> --- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> +++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> @@ -1889,11 +1893,24 @@ static int tpg_pattern_avg(const struct tpg_data *tpg,
>  	return -1;
>  }
>  
> +static const char *tpg_color_enc_str(enum tgp_color_enc
> +						 color_enc)
> +{
> +	switch (color_enc) {
> +	case TGP_COLOR_ENC_YUV:
> +		return "YCbCr";

Use "Y'CbCr"

> +	case TGP_COLOR_ENC_RGB:
> +	default:
> +		return "RGB";

and "R'G'B'".

That's more precise.

> +
> +	}
> +}
> +
>  void tpg_log_status(struct tpg_data *tpg)
>  {
>  	pr_info("tpg source WxH: %ux%u (%s)\n",
> -			tpg->src_width, tpg->src_height,
> -			tpg->is_yuv ? "YCbCr" : "RGB");
> +		tpg->src_width, tpg->src_height,
> +		tpg_color_enc_str(tpg->color_enc));
>  	pr_info("tpg field: %u\n", tpg->field);
>  	pr_info("tpg crop: %ux%u@...%d\n", tpg->crop.width, tpg->crop.height,
>  			tpg->crop.left, tpg->crop.top);
> diff --git a/include/media/v4l2-tpg.h b/include/media/v4l2-tpg.h
> index 329bebfa930c..e4da507d40e2 100644
> --- a/include/media/v4l2-tpg.h
> +++ b/include/media/v4l2-tpg.h
> @@ -87,6 +87,11 @@ enum tpg_move_mode {
>  	TPG_MOVE_POS_FAST,
>  };
>  
> +enum tgp_color_enc {
> +	TGP_COLOR_ENC_RGB,
> +	TGP_COLOR_ENC_YUV,

Rename this to YCBCR. It's the technically correct name.

Regards,

	Hans

> +};
> +
>  extern const char * const tpg_aspect_strings[];
>  
>  #define TPG_MAX_PLANES 3
> @@ -119,7 +124,7 @@ struct tpg_data {
>  	u8				saturation;
>  	s16				hue;
>  	u32				fourcc;
> -	bool				is_yuv;
> +	enum tgp_color_enc		color_enc;
>  	u32				colorspace;
>  	u32				xfer_func;
>  	u32				ycbcr_enc;
>