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Commit d5735d64 authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

[media] videodev2.h: improve colorspace support



Add support for the new AdobeRGB and BT.2020 colorspaces as needed for
HDMI 2.0.

Add support to specify the Y'CbCr encoding and quantization range explicitly.

Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent ac61e378
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+89 −10
Original line number Diff line number Diff line
@@ -178,30 +178,103 @@ enum v4l2_memory {

/* see also http://vektor.theorem.ca/graphics/ycbcr/ */
enum v4l2_colorspace {
	/* ITU-R 601 -- broadcast NTSC/PAL */
	/* SMPTE 170M: used for broadcast NTSC/PAL SDTV */
	V4L2_COLORSPACE_SMPTE170M     = 1,

	/* 1125-Line (US) HDTV */
	/* Obsolete pre-1998 SMPTE 240M HDTV standard, superseded by Rec 709 */
	V4L2_COLORSPACE_SMPTE240M     = 2,

	/* HD and modern captures. */
	/* Rec.709: used for HDTV */
	V4L2_COLORSPACE_REC709        = 3,

	/* broken BT878 extents (601, luma range 16-253 instead of 16-235) */
	/*
	 * Deprecated, do not use. No driver will ever return this. This was
	 * based on a misunderstanding of the bt878 datasheet.
	 */
	V4L2_COLORSPACE_BT878         = 4,

	/* These should be useful.  Assume 601 extents. */
	/*
	 * NTSC 1953 colorspace. This only makes sense when dealing with
	 * really, really old NTSC recordings. Superseded by SMPTE 170M.
	 */
	V4L2_COLORSPACE_470_SYSTEM_M  = 5,

	/*
	 * EBU Tech 3213 PAL/SECAM colorspace. This only makes sense when
	 * dealing with really old PAL/SECAM recordings. Superseded by
	 * SMPTE 170M.
	 */
	V4L2_COLORSPACE_470_SYSTEM_BG = 6,

	/* I know there will be cameras that send this.  So, this is
	 * unspecified chromaticities and full 0-255 on each of the
	 * Y'CbCr components
	/*
	 * Effectively shorthand for V4L2_COLORSPACE_SRGB, V4L2_YCBCR_ENC_601
	 * and V4L2_QUANTIZATION_FULL_RANGE. To be used for (Motion-)JPEG.
	 */
	V4L2_COLORSPACE_JPEG          = 7,

	/* For RGB colourspaces, this is probably a good start. */
	/* For RGB colorspaces such as produces by most webcams. */
	V4L2_COLORSPACE_SRGB          = 8,

	/* AdobeRGB colorspace */
	V4L2_COLORSPACE_ADOBERGB      = 9,

	/* BT.2020 colorspace, used for UHDTV. */
	V4L2_COLORSPACE_BT2020        = 10,
};

enum v4l2_ycbcr_encoding {
	/*
	 * Mapping of V4L2_YCBCR_ENC_DEFAULT to actual encodings for the
	 * various colorspaces:
	 *
	 * V4L2_COLORSPACE_SMPTE170M, V4L2_COLORSPACE_470_SYSTEM_M,
	 * V4L2_COLORSPACE_470_SYSTEM_BG, V4L2_COLORSPACE_ADOBERGB and
	 * V4L2_COLORSPACE_JPEG: V4L2_YCBCR_ENC_601
	 *
	 * V4L2_COLORSPACE_REC709: V4L2_YCBCR_ENC_709
	 *
	 * V4L2_COLORSPACE_SRGB: V4L2_YCBCR_ENC_SYCC
	 *
	 * V4L2_COLORSPACE_BT2020: V4L2_YCBCR_ENC_BT2020
	 *
	 * V4L2_COLORSPACE_SMPTE240M: V4L2_YCBCR_ENC_SMPTE240M
	 */
	V4L2_YCBCR_ENC_DEFAULT        = 0,

	/* ITU-R 601 -- SDTV */
	V4L2_YCBCR_ENC_601            = 1,

	/* Rec. 709 -- HDTV */
	V4L2_YCBCR_ENC_709            = 2,

	/* ITU-R 601/EN 61966-2-4 Extended Gamut -- SDTV */
	V4L2_YCBCR_ENC_XV601          = 3,

	/* Rec. 709/EN 61966-2-4 Extended Gamut -- HDTV */
	V4L2_YCBCR_ENC_XV709          = 4,

	/* sYCC (Y'CbCr encoding of sRGB) */
	V4L2_YCBCR_ENC_SYCC           = 5,

	/* BT.2020 Non-constant Luminance Y'CbCr */
	V4L2_YCBCR_ENC_BT2020         = 6,

	/* BT.2020 Constant Luminance Y'CbcCrc */
	V4L2_YCBCR_ENC_BT2020_CONST_LUM = 7,

	/* SMPTE 240M -- Obsolete HDTV */
	V4L2_YCBCR_ENC_SMPTE240M      = 8,
};

enum v4l2_quantization {
	/*
	 * The default for R'G'B' quantization is always full range. For
	 * Y'CbCr the quantization is always limited range, except for
	 * SYCC, XV601, XV709 or JPEG: those are full range.
	 */
	V4L2_QUANTIZATION_DEFAULT     = 0,
	V4L2_QUANTIZATION_FULL_RANGE  = 1,
	V4L2_QUANTIZATION_LIM_RANGE   = 2,
};

enum v4l2_priority {
@@ -294,6 +367,8 @@ struct v4l2_pix_format {
	__u32			colorspace;	/* enum v4l2_colorspace */
	__u32			priv;		/* private data, depends on pixelformat */
	__u32			flags;		/* format flags (V4L2_PIX_FMT_FLAG_*) */
	__u32			ycbcr_enc;	/* enum v4l2_ycbcr_encoding */
	__u32			quantization;	/* enum v4l2_quantization */
};

/*      Pixel format         FOURCC                          depth  Description  */
@@ -1777,6 +1852,8 @@ struct v4l2_plane_pix_format {
 * @plane_fmt:		per-plane information
 * @num_planes:		number of planes for this format
 * @flags:		format flags (V4L2_PIX_FMT_FLAG_*)
 * @ycbcr_enc:		enum v4l2_ycbcr_encoding, Y'CbCr encoding
 * @quantization:	enum v4l2_quantization, colorspace quantization
 */
struct v4l2_pix_format_mplane {
	__u32				width;
@@ -1788,7 +1865,9 @@ struct v4l2_pix_format_mplane {
	struct v4l2_plane_pix_format	plane_fmt[VIDEO_MAX_PLANES];
	__u8				num_planes;
	__u8				flags;
	__u8				reserved[10];
	__u8				ycbcr_enc;
	__u8				quantization;
	__u8				reserved[8];
} __attribute__ ((packed));

/**