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Date: Tue, 10 Nov 2020 12:13:09 +0200
From: Stanimir Varbanov <stanimir.varbanov@...aro.org>
To: Hans Verkuil <hverkuil-cisco@...all.nl>,
linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-msm@...r.kernel.org
Cc: Nicolas Dufresne <nicolas.dufresne@...labora.com>,
Ezequiel Garcia <ezequiel@...labora.com>
Subject: Re: [PATCH 1/3] v4l: Add HDR10 HEVC static metadata controls
On 11/10/20 11:43 AM, Hans Verkuil wrote:
> On 09/11/2020 18:31, Stanimir Varbanov wrote:
>> Add Content light level and Mastering display colour volume v4l2
>> compounf controls, relevant payload structures and validation.
>
> Typo: compounf -> compound
>
>>
>> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
>> ---
>> drivers/media/v4l2-core/v4l2-ctrls.c | 61 ++++++++++++++++++++++++++++
>> include/media/hevc-ctrls.h | 41 +++++++++++++++++++
>> include/media/v4l2-ctrls.h | 2 +
>> 3 files changed, 104 insertions(+)
>>
>> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
>> index bd7f330c941c..f70eaa6a46df 100644
>> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
>> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
>> @@ -1023,6 +1023,8 @@ const char *v4l2_ctrl_get_name(u32 id)
>> case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS: return "HEVC Slice Parameters";
>> case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE: return "HEVC Decode Mode";
>> case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE: return "HEVC Start Code";
>> + case V4L2_CID_MPEG_VIDEO_HEVC_CLL_INFO: return "HEVC Content Light Info";
>> + case V4L2_CID_MPEG_VIDEO_HEVC_MASTERING_DISPLAY: return "HEVC Mastering Display";
>
> Why is this split up in two controls? Can you have one, but not the other?
>
> From what I can tell they are always combined (see CTA-861-G, SMPTE 2086).
I split to two control IDs because in ITU-T Rec. H265 CLL and Mastering
Display colour volume are different SEI messages. I guessed that they
could exist in the bitstream independently, though I'm not sure about that.
I think, if we decide that hdr10-ctrls.h will be better place for these
controls we can combine CLL and Mastering display in one control -
V4L2_CID_MPEG_HDR10_STATIC_METADATA.
And later we could introduce V4L2_CID_MPEG_HDR10_DYNAMIC_METADATA for
hdr10+ (2094-40).
>
> Regards,
>
> Hans
>
>>
>> /* CAMERA controls */
>> /* Keep the order of the 'case's the same as in v4l2-controls.h! */
>> @@ -1461,6 +1463,12 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>> case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS:
>> *type = V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS;
>> break;
>> + case V4L2_CID_MPEG_VIDEO_HEVC_CLL_INFO:
>> + *type = V4L2_CTRL_TYPE_HEVC_CLL_INFO;
>> + break;
>> + case V4L2_CID_MPEG_VIDEO_HEVC_MASTERING_DISPLAY:
>> + *type = V4L2_CTRL_TYPE_HEVC_MASTERING_DISPLAY;
>> + break;
>> case V4L2_CID_UNIT_CELL_SIZE:
>> *type = V4L2_CTRL_TYPE_AREA;
>> *flags |= V4L2_CTRL_FLAG_READ_ONLY;
>> @@ -1775,6 +1783,7 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
>> struct v4l2_ctrl_hevc_sps *p_hevc_sps;
>> struct v4l2_ctrl_hevc_pps *p_hevc_pps;
>> struct v4l2_ctrl_hevc_slice_params *p_hevc_slice_params;
>> + struct v4l2_ctrl_hevc_mastering_display *p_hevc_mastering;
>> struct v4l2_area *area;
>> void *p = ptr.p + idx * ctrl->elem_size;
>> unsigned int i;
>> @@ -1934,6 +1943,52 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
>> zero_padding(*p_hevc_slice_params);
>> break;
>>
>> + case V4L2_CTRL_TYPE_HEVC_CLL_INFO:
>> + break;
>> +
>> + case V4L2_CTRL_TYPE_HEVC_MASTERING_DISPLAY:
>> + p_hevc_mastering = p;
>> +
>> + for (i = 0; i < 3; ++i) {
>> + if (p_hevc_mastering->display_primaries_x[i] <
>> + V4L2_HEVC_MASTERING_PRIMARIES_X_LOW ||
>> + p_hevc_mastering->display_primaries_x[i] >
>> + V4L2_HEVC_MASTERING_PRIMARIES_X_HIGH ||
>> + p_hevc_mastering->display_primaries_y[i] <
>> + V4L2_HEVC_MASTERING_PRIMARIES_Y_LOW ||
>> + p_hevc_mastering->display_primaries_y[i] >
>> + V4L2_HEVC_MASTERING_PRIMARIES_Y_HIGH)
>> + return -EINVAL;
>> + }
>> +
>> + if (p_hevc_mastering->white_point_x <
>> + V4L2_HEVC_MASTERING_WHITE_POINT_X_LOW ||
>> + p_hevc_mastering->white_point_x >
>> + V4L2_HEVC_MASTERING_WHITE_POINT_X_HIGH ||
>> + p_hevc_mastering->white_point_y <
>> + V4L2_HEVC_MASTERING_WHITE_POINT_Y_LOW ||
>> + p_hevc_mastering->white_point_y >
>> + V4L2_HEVC_MASTERING_WHITE_POINT_Y_HIGH)
>> + return -EINVAL;
>> +
>> + if (p_hevc_mastering->max_luminance <
>> + V4L2_HEVC_MASTERING_MAX_LUMA_LOW ||
>> + p_hevc_mastering->max_luminance >
>> + V4L2_HEVC_MASTERING_MAX_LUMA_HIGH ||
>> + p_hevc_mastering->min_luminance <
>> + V4L2_HEVC_MASTERING_MIN_LUMA_LOW ||
>> + p_hevc_mastering->min_luminance >
>> + V4L2_HEVC_MASTERING_MIN_LUMA_HIGH)
>> + return -EINVAL;
>> +
>> + if (p_hevc_mastering->max_luminance ==
>> + V4L2_HEVC_MASTERING_MAX_LUMA_LOW &&
>> + p_hevc_mastering->min_luminance ==
>> + V4L2_HEVC_MASTERING_MIN_LUMA_HIGH)
>> + return -EINVAL;
>> +
>> + break;
>> +
>> case V4L2_CTRL_TYPE_AREA:
>> area = p;
>> if (!area->width || !area->height)
>> @@ -2626,6 +2681,12 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
>> case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
>> elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params);
>> break;
>> + case V4L2_CTRL_TYPE_HEVC_CLL_INFO:
>> + elem_size = sizeof(struct v4l2_ctrl_hevc_cll_info);
>> + break;
>> + case V4L2_CTRL_TYPE_HEVC_MASTERING_DISPLAY:
>> + elem_size = sizeof(struct v4l2_ctrl_hevc_mastering_display);
>> + break;
>> case V4L2_CTRL_TYPE_AREA:
>> elem_size = sizeof(struct v4l2_area);
>> break;
>> diff --git a/include/media/hevc-ctrls.h b/include/media/hevc-ctrls.h
>> index 1009cf0891cc..d254457d2846 100644
>> --- a/include/media/hevc-ctrls.h
>> +++ b/include/media/hevc-ctrls.h
>> @@ -209,4 +209,45 @@ struct v4l2_ctrl_hevc_slice_params {
>> __u64 flags;
>> };
>>
>> +/*
>> + * Content light level information.
>> + * Source Rec. ITU-T H.265 v7 (11/2019) HEVC; D.2.35
>> + */
>> +#define V4L2_CID_MPEG_VIDEO_HEVC_CLL_INFO (V4L2_CID_MPEG_BASE + 1017)
>> +#define V4L2_CTRL_TYPE_HEVC_CLL_INFO 0x0123
>> +
>> +struct v4l2_ctrl_hevc_cll_info {
>> + __u16 max_content_light_level;
>> + __u16 max_pic_average_light_level;
>> +};
>> +
>> +/*
>> + * Mastering display colour volume.
>> + * Source Rec. ITU-T H.265 v7 (11/2019) HEVC; D.2.28
>> + */
>> +#define V4L2_CID_MPEG_VIDEO_HEVC_MASTERING_DISPLAY (V4L2_CID_MPEG_BASE + 1018)
>> +#define V4L2_CTRL_TYPE_HEVC_MASTERING_DISPLAY 0x0124
>> +
>> +#define V4L2_HEVC_MASTERING_PRIMARIES_X_LOW 5
>> +#define V4L2_HEVC_MASTERING_PRIMARIES_X_HIGH 37000
>> +#define V4L2_HEVC_MASTERING_PRIMARIES_Y_LOW 5
>> +#define V4L2_HEVC_MASTERING_PRIMARIES_Y_HIGH 42000
>> +#define V4L2_HEVC_MASTERING_WHITE_POINT_X_LOW 5
>> +#define V4L2_HEVC_MASTERING_WHITE_POINT_X_HIGH 37000
>> +#define V4L2_HEVC_MASTERING_WHITE_POINT_Y_LOW 5
>> +#define V4L2_HEVC_MASTERING_WHITE_POINT_Y_HIGH 42000
>> +#define V4L2_HEVC_MASTERING_MAX_LUMA_LOW 50000
>> +#define V4L2_HEVC_MASTERING_MAX_LUMA_HIGH 100000000
>> +#define V4L2_HEVC_MASTERING_MIN_LUMA_LOW 1
>> +#define V4L2_HEVC_MASTERING_MIN_LUMA_HIGH 50000
>> +
>> +struct v4l2_ctrl_hevc_mastering_display {
>> + __u16 display_primaries_x[3];
>> + __u16 display_primaries_y[3];
>> + __u16 white_point_x;
>> + __u16 white_point_y;
>> + __u32 max_luminance;
>> + __u32 min_luminance;
>> +};
>> +
>> #endif
>> diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
>> index cb25f345e9ad..6120e29945e1 100644
>> --- a/include/media/v4l2-ctrls.h
>> +++ b/include/media/v4l2-ctrls.h
>> @@ -80,6 +80,8 @@ union v4l2_ctrl_ptr {
>> struct v4l2_ctrl_hevc_sps *p_hevc_sps;
>> struct v4l2_ctrl_hevc_pps *p_hevc_pps;
>> struct v4l2_ctrl_hevc_slice_params *p_hevc_slice_params;
>> + struct v4l2_ctrl_hevc_cll_info *p_hevc_cll;
>> + struct v4l2_ctrl_hevc_mastering_display *p_hevc_mastering;
>> struct v4l2_area *p_area;
>> void *p;
>> const void *p_const;
>>
>
--
regards,
Stan
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