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diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv-luma.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv-luma.rst new file mode 100644 index 000000000..6a387f9df --- /dev/null +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv-luma.rst @@ -0,0 +1,148 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _yuv-luma-only: + +***************** +Luma-Only Formats +***************** + +This family of formats only store the luma component of a Y'CbCr image. They +are often referred to as greyscale formats. + +.. note:: + + - In all the tables that follow, bit 7 is the most significant bit in a byte. + - Formats are described with the minimum number of pixels needed to create a + byte-aligned repeating pattern. `...` indicates repetition of the pattern. + - Y'\ :sub:`x`\ [9:2] denotes bits 9 to 2 of the Y' value for pixel at colum + `x`. + - `0` denotes padding bits set to 0. + + +.. raw:: latex + + \scriptsize + +.. tabularcolumns:: |p{3.6cm}|p{3.0cm}|p{1.3cm}|p{2.6cm}|p{1.3cm}|p{1.3cm}|p{1.3cm}| + +.. flat-table:: Luma-Only Image Formats + :header-rows: 1 + :stub-columns: 0 + + * - Identifier + - Code + - Byte 0 + - Byte 1 + - Byte 2 + - Byte 3 + - Byte 4 + + * .. _V4L2-PIX-FMT-GREY: + + - ``V4L2_PIX_FMT_GREY`` + - 'GREY' + + - Y'\ :sub:`0`\ [7:0] + - ... + - ... + - ... + - ... + + * .. _V4L2-PIX-FMT-IPU3-Y10: + + - ``V4L2_PIX_FMT_IPU3_Y10`` + - 'ip3y' + + - Y'\ :sub:`0`\ [7:0] + - Y'\ :sub:`1`\ [5:0] Y'\ :sub:`0`\ [9:8] + - Y'\ :sub:`2`\ [3:0] Y'\ :sub:`1`\ [9:6] + - Y'\ :sub:`3`\ [1:0] Y'\ :sub:`2`\ [9:4] + - Y'\ :sub:`3`\ [9:2] + + * .. _V4L2-PIX-FMT-Y10: + + - ``V4L2_PIX_FMT_Y10`` + - 'Y10 ' + + - Y'\ :sub:`0`\ [7:0] + - `000000` Y'\ :sub:`0`\ [9:8] + - ... + - ... + - ... + + * .. _V4L2-PIX-FMT-Y10BPACK: + + - ``V4L2_PIX_FMT_Y10BPACK`` + - 'Y10B' + + - Y'\ :sub:`0`\ [9:2] + - Y'\ :sub:`0`\ [1:0] Y'\ :sub:`1`\ [9:4] + - Y'\ :sub:`1`\ [3:0] Y'\ :sub:`2`\ [9:6] + - Y'\ :sub:`2`\ [5:0] Y'\ :sub:`3`\ [9:8] + - Y'\ :sub:`3`\ [7:0] + + * .. _V4L2-PIX-FMT-Y10P: + + - ``V4L2_PIX_FMT_Y10P`` + - 'Y10P' + + - Y'\ :sub:`0`\ [9:2] + - Y'\ :sub:`1`\ [9:2] + - Y'\ :sub:`2`\ [9:2] + - Y'\ :sub:`3`\ [9:2] + - Y'\ :sub:`3`\ [1:0] Y'\ :sub:`2`\ [1:0] Y'\ :sub:`1`\ [1:0] Y'\ :sub:`0`\ [1:0] + + * .. _V4L2-PIX-FMT-Y12: + + - ``V4L2_PIX_FMT_Y12`` + - 'Y12 ' + + - Y'\ :sub:`0`\ [7:0] + - `0000` Y'\ :sub:`0`\ [11:8] + - ... + - ... + - ... + + * .. _V4L2-PIX-FMT-Y14: + + - ``V4L2_PIX_FMT_Y14`` + - 'Y14 ' + + - Y'\ :sub:`0`\ [7:0] + - `00` Y'\ :sub:`0`\ [13:8] + - ... + - ... + - ... + + * .. _V4L2-PIX-FMT-Y16: + + - ``V4L2_PIX_FMT_Y16`` + - 'Y16 ' + + - Y'\ :sub:`0`\ [7:0] + - Y'\ :sub:`0`\ [15:8] + - ... + - ... + - ... + + * .. _V4L2-PIX-FMT-Y16-BE: + + - ``V4L2_PIX_FMT_Y16_BE`` + - 'Y16 ' | (1U << 31) + + - Y'\ :sub:`0`\ [15:8] + - Y'\ :sub:`0`\ [7:0] + - ... + - ... + - ... + +.. raw:: latex + + \normalsize + +.. note:: + + For the Y16 and Y16_BE formats, the actual sampling precision may be lower + than 16 bits. For example, 10 bits per pixel uses values in the range 0 to + 1023. For the IPU3_Y10 format 25 pixels are packed into 32 bytes, which + leaves the 6 most significant bits of the last byte padded with 0. |