GstVideo.VideoColorPrimariesInfo

Since : 1.6

GstVideo.VideoColorimetry

GstVideo.VideoColorimetry.prototype.from_string

function GstVideo.VideoColorimetry.prototype.from_string(color: String): {
    // javascript wrapper for 'gst_video_colorimetry_from_string'
}

Parse the colorimetry string and update cinfo with the parsed values.

GstVideo.VideoColorimetry.prototype.is_equal

function GstVideo.VideoColorimetry.prototype.is_equal(other: GstVideo.VideoColorimetry): {
    // javascript wrapper for 'gst_video_colorimetry_is_equal'
}

Compare the 2 colorimetry sets for equality

Since : 1.6

GstVideo.VideoColorimetry.prototype.is_equivalent

function GstVideo.VideoColorimetry.prototype.is_equivalent(bitdepth: Number, other: GstVideo.VideoColorimetry, other_bitdepth: Number): {
    // javascript wrapper for 'gst_video_colorimetry_is_equivalent'
}

Compare the 2 colorimetry sets for functionally equality

Since : 1.22

GstVideo.VideoColorimetry.prototype.matches

function GstVideo.VideoColorimetry.prototype.matches(color: String): {
    // javascript wrapper for 'gst_video_colorimetry_matches'
}

Check if the colorimetry information in info matches that of the string color.

GstVideo.VideoColorimetry.prototype.to_string

function GstVideo.VideoColorimetry.prototype.to_string(): {
    // javascript wrapper for 'gst_video_colorimetry_to_string'
}

Make a string representation of cinfo.

GstVideo.prototype.video_color_matrix_from_iso

function GstVideo.prototype.video_color_matrix_from_iso(value: Number): {
    // javascript wrapper for 'gst_video_color_matrix_from_iso'
}

Converts the value to the GstVideo.VideoColorMatrix The matrix coefficients (MatrixCoefficients) value is defined by "ISO/IEC 23001-8 Section 7.3 Table 4" and "ITU-T H.273 Table 4". "H.264 Table E-5" and "H.265 Table E.5" share the identical values.

Since : 1.18

GstVideo.prototype.video_color_matrix_get_Kr_Kb

function GstVideo.prototype.video_color_matrix_get_Kr_Kb(matrix: GstVideo.VideoColorMatrix): {
    // javascript wrapper for 'gst_video_color_matrix_get_Kr_Kb'
}

Get the coefficients used to convert between Y'PbPr and R'G'B' using matrix.

When:

   0.0 <= [Y',R',G',B'] <= 1.0)
   (-0.5 <= [Pb,Pr] <= 0.5)

the general conversion is given by:

   Y' = Kr*R' + (1-Kr-Kb)*G' + Kb*B'
   Pb = (B'-Y')/(2*(1-Kb))
   Pr = (R'-Y')/(2*(1-Kr))

and the other way around:

   R' = Y' + Cr*2*(1-Kr)
   G' = Y' - Cb*2*(1-Kb)*Kb/(1-Kr-Kb) - Cr*2*(1-Kr)*Kr/(1-Kr-Kb)
   B' = Y' + Cb*2*(1-Kb)

Since : 1.6

GstVideo.prototype.video_color_matrix_to_iso

function GstVideo.prototype.video_color_matrix_to_iso(matrix: GstVideo.VideoColorMatrix): {
    // javascript wrapper for 'gst_video_color_matrix_to_iso'
}

Converts GstVideo.VideoColorMatrix to the "matrix coefficients" (MatrixCoefficients) value defined by "ISO/IEC 23001-8 Section 7.3 Table 4" and "ITU-T H.273 Table 4". "H.264 Table E-5" and "H.265 Table E.5" share the identical values.

Since : 1.18

GstVideo.prototype.video_color_primaries_from_iso

function GstVideo.prototype.video_color_primaries_from_iso(value: Number): {
    // javascript wrapper for 'gst_video_color_primaries_from_iso'
}

Converts the value to the GstVideo.VideoColorPrimaries The colour primaries (ColourPrimaries) value is defined by "ISO/IEC 23001-8 Section 7.1 Table 2" and "ITU-T H.273 Table 2". "H.264 Table E-3" and "H.265 Table E.3" share the identical values.

Since : 1.18

GstVideo.prototype.video_color_primaries_get_info

function GstVideo.prototype.video_color_primaries_get_info(primaries: GstVideo.VideoColorPrimaries): {
    // javascript wrapper for 'gst_video_color_primaries_get_info'
}

Get information about the chromaticity coordinates of primaries.

Since : 1.6

GstVideo.prototype.video_color_primaries_is_equivalent

function GstVideo.prototype.video_color_primaries_is_equivalent(primaries: GstVideo.VideoColorPrimaries, other: GstVideo.VideoColorPrimaries): {
    // javascript wrapper for 'gst_video_color_primaries_is_equivalent'
}

Checks whether primaries and other are functionally equivalent

Since : 1.22

GstVideo.prototype.video_color_primaries_to_iso

function GstVideo.prototype.video_color_primaries_to_iso(primaries: GstVideo.VideoColorPrimaries): {
    // javascript wrapper for 'gst_video_color_primaries_to_iso'
}

Converts GstVideo.VideoColorPrimaries to the "colour primaries" (ColourPrimaries) value defined by "ISO/IEC 23001-8 Section 7.1 Table 2" and "ITU-T H.273 Table 2". "H.264 Table E-3" and "H.265 Table E.3" share the identical values.

Since : 1.18

GstVideo.prototype.video_color_range_offsets

function GstVideo.prototype.video_color_range_offsets(range: GstVideo.VideoColorRange, info: GstVideo.VideoFormatInfo): {
    // javascript wrapper for 'gst_video_color_range_offsets'
}

Compute the offset and scale values for each component of info. For each component, (c[i] - offset[i]) / scale[i] will scale the component c[i] to the range [0.0 .. 1.0].

The reverse operation (c[i] * scale[i]) + offset[i] can be used to convert the component values in range [0.0 .. 1.0] back to their representation in info and range.

GstVideo.prototype.video_color_transfer_decode

function GstVideo.prototype.video_color_transfer_decode(func: GstVideo.VideoTransferFunction, val: Number): {
    // javascript wrapper for 'gst_video_color_transfer_decode'
}

deprecated : 1.20: Use gst_video_transfer_function_decode() instead.

Since : 1.6

GstVideo.prototype.video_color_transfer_encode

function GstVideo.prototype.video_color_transfer_encode(func: GstVideo.VideoTransferFunction, val: Number): {
    // javascript wrapper for 'gst_video_color_transfer_encode'
}

deprecated : 1.20: Use gst_video_transfer_function_encode() instead.

Since : 1.6

GstVideo.prototype.video_transfer_function_decode

function GstVideo.prototype.video_transfer_function_decode(func: GstVideo.VideoTransferFunction, val: Number): {
    // javascript wrapper for 'gst_video_transfer_function_decode'
}

Convert val to its gamma decoded value. This is the inverse operation of GstVideo.prototype.video_color_transfer_encode.

For a non-linear value L' in the range [0..1], conversion to the linear L is in general performed with a power function like:

    L = L' ^ gamma

Depending on func, different formulas might be applied. Some formulas encode a linear segment in the lower range.

Since : 1.20

GstVideo.prototype.video_transfer_function_encode

function GstVideo.prototype.video_transfer_function_encode(func: GstVideo.VideoTransferFunction, val: Number): {
    // javascript wrapper for 'gst_video_transfer_function_encode'
}

Convert val to its gamma encoded value.

For a linear value L in the range [0..1], conversion to the non-linear (gamma encoded) L' is in general performed with a power function like:

    L' = L ^ (1 / gamma)

Depending on func, different formulas might be applied. Some formulas encode a linear segment in the lower range.

Since : 1.20

GstVideo.prototype.video_transfer_function_from_iso

function GstVideo.prototype.video_transfer_function_from_iso(value: Number): {
    // javascript wrapper for 'gst_video_transfer_function_from_iso'
}

Converts the value to the GstVideo.VideoTransferFunction The transfer characteristics (TransferCharacteristics) value is defined by "ISO/IEC 23001-8 Section 7.2 Table 3" and "ITU-T H.273 Table 3". "H.264 Table E-4" and "H.265 Table E.4" share the identical values.

Since : 1.18

GstVideo.prototype.video_transfer_function_is_equivalent

function GstVideo.prototype.video_transfer_function_is_equivalent(from_func: GstVideo.VideoTransferFunction, from_bpp: Number, to_func: GstVideo.VideoTransferFunction, to_bpp: Number): {
    // javascript wrapper for 'gst_video_transfer_function_is_equivalent'
}

Returns whether from_func and to_func are equivalent. There are cases (e.g. BT601, BT709, and BT2020_10) where several functions are functionally identical. In these cases, when doing conversion, we should consider them as equivalent. Also, BT2020_12 is the same as the aforementioned three for less than 12 bits per pixel.

Since : 1.18

GstVideo.prototype.video_transfer_function_to_iso

function GstVideo.prototype.video_transfer_function_to_iso(func: GstVideo.VideoTransferFunction): {
    // javascript wrapper for 'gst_video_transfer_function_to_iso'
}

Converts GstVideo.VideoTransferFunction to the "transfer characteristics" (TransferCharacteristics) value defined by "ISO/IEC 23001-8 Section 7.2 Table 3" and "ITU-T H.273 Table 3". "H.264 Table E-4" and "H.265 Table E.4" share the identical values.

Since : 1.18

GstVideo.VideoColorMatrix

The color matrix is used to convert between Y'PbPr and non-linear RGB (R'G'B')

GstVideo.VideoColorPrimaries

The color primaries define the how to transform linear RGB values to and from the CIE XYZ colorspace.

GstVideo.VideoColorRange

Possible color range values. These constants are defined for 8 bit color values and can be scaled for other bit depths.

GstVideo.VideoTransferFunction

The video transfer function defines the formula for converting between non-linear RGB (R'G'B') and linear RGB

GstVideo.VIDEO_COLORIMETRY_BT2020

GstVideo.VIDEO_COLORIMETRY_BT2020_10

GstVideo.VIDEO_COLORIMETRY_BT2100_HLG

GstVideo.VIDEO_COLORIMETRY_BT2100_PQ

GstVideo.VIDEO_COLORIMETRY_BT601

GstVideo.VIDEO_COLORIMETRY_BT709

GstVideo.VIDEO_COLORIMETRY_SMPTE240M

GstVideo.VIDEO_COLORIMETRY_SRGB