From: Hans Verkuil <hverkuil@xs4all.nl>
To: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>,
Jonathan Corbet <corbet@lwn.net>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Markus Heiser <markus.heiser@darmarIT.de>,
Helen Mae Koike Fornazier <helen.koike@collabora.co.uk>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Antti Palosaari <crope@iki.fi>,
Philipp Zabel <p.zabel@pengutronix.de>,
Shuah Khan <shuahkh@osg.samsung.com>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-media@vger.kernel.org
Subject: Re: [PATCH v3 8/9] [media] vivid: Fix YUV555 and YUV565 handling
Date: Mon, 18 Jul 2016 10:51:53 +0200 [thread overview]
Message-ID: <6224fd35-50f3-e1cd-a9b5-f377087fade6@xs4all.nl> (raw)
In-Reply-To: <1468665716-10178-9-git-send-email-ricardo.ribalda@gmail.com>
On 07/16/2016 12:41 PM, Ricardo Ribalda Delgado wrote:
> precalculate_color() had a optimization that avoided duplicated
> conversion for YUV formats. This optimization did not take into
> consideration YUV444, YUV555, YUV565 or limited range quantization.
>
> This patch keeps the optimization, but fixes the wrong handling.
>
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
> ---
> drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 19 ++++++++-----------
> 1 file changed, 8 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> index e91bf3cbaab9..1c862465e335 100644
> --- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> +++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> @@ -797,6 +797,8 @@ static void precalculate_color(struct tpg_data *tpg, int k)
> int r = tpg_colors[col].r;
> int g = tpg_colors[col].g;
> int b = tpg_colors[col].b;
> + int y, cb, cr;
> + bool ycbbr_valid = false;
I guess you mean ycbcr_valid?
Regards,
Hans
>
> if (k == TPG_COLOR_TEXTBG) {
> col = tpg_get_textbg_color(tpg);
> @@ -873,7 +875,6 @@ static void precalculate_color(struct tpg_data *tpg, int k)
> tpg->saturation != 128 || tpg->hue) &&
> tpg->color_enc != TGP_COLOR_ENC_LUMA) {
> /* Implement these operations */
> - int y, cb, cr;
> int tmp_cb, tmp_cr;
>
> /* First convert to YCbCr */
> @@ -890,13 +891,10 @@ static void precalculate_color(struct tpg_data *tpg, int k)
>
> cb = (128 << 4) + (tmp_cb * tpg->contrast * tpg->saturation) / (128 * 128);
> cr = (128 << 4) + (tmp_cr * tpg->contrast * tpg->saturation) / (128 * 128);
> - if (tpg->color_enc == TGP_COLOR_ENC_YUV) {
> - tpg->colors[k][0] = clamp(y >> 4, 1, 254);
> - tpg->colors[k][1] = clamp(cb >> 4, 1, 254);
> - tpg->colors[k][2] = clamp(cr >> 4, 1, 254);
> - return;
> - }
> - ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
> + if (tpg->color_enc == TGP_COLOR_ENC_YUV)
> + ycbbr_valid = true;
> + else
> + ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
> } else if ((tpg->brightness != 128 || tpg->contrast != 128) &&
> tpg->color_enc == TGP_COLOR_ENC_LUMA) {
> r = (16 << 4) + ((r - (16 << 4)) * tpg->contrast) / 128;
> @@ -917,9 +915,8 @@ static void precalculate_color(struct tpg_data *tpg, int k)
> case TGP_COLOR_ENC_YUV:
> {
> /* Convert to YCbCr */
> - int y, cb, cr;
> -
> - color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
> + if (!ycbbr_valid)
> + color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);
>
> if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
> y = clamp(y, 16 << 4, 235 << 4);
>
next prev parent reply other threads:[~2016-07-18 8:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-16 10:41 [PATCH v3 0/9] Add HSV format Ricardo Ribalda Delgado
2016-07-16 10:41 ` [PATCH v3 1/9] [media] videodev2.h Add HSV formats Ricardo Ribalda Delgado
2016-07-16 10:41 ` [PATCH v3 2/9] [media] Documentation: Add HSV format Ricardo Ribalda Delgado
2016-07-16 10:41 ` [PATCH v3 3/9] [media] Documentation: Add Ricardo Ribalda Ricardo Ribalda Delgado
2016-07-16 10:41 ` [PATCH v3 4/9] [media] vivid: code refactor for color encoding Ricardo Ribalda Delgado
2016-07-18 8:40 ` Hans Verkuil
2016-07-16 10:41 ` [PATCH v3 5/9] [media] vivid: Add support for HSV formats Ricardo Ribalda Delgado
2016-07-16 10:41 ` [PATCH v3 6/9] [media] vivid: Rename variable Ricardo Ribalda Delgado
2016-07-16 10:41 ` [PATCH v3 7/9] [media] vivid: Introduce TPG_COLOR_ENC_LUMA Ricardo Ribalda Delgado
2016-07-16 10:41 ` [PATCH v3 8/9] [media] vivid: Fix YUV555 and YUV565 handling Ricardo Ribalda Delgado
2016-07-18 8:51 ` Hans Verkuil [this message]
2016-07-18 9:03 ` Ricardo Ribalda Delgado
2016-07-16 10:41 ` [PATCH v3 9/9] [media] vivid: Local optimization Ricardo Ribalda Delgado
2016-07-16 10:52 ` Ricardo Ribalda Delgado
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