****************************
In V4L2 colorspaces are defined by four values. The first is the
-colorspace identifier (enum :ref:`v4l2_colorspace <v4l2-colorspace>`)
+colorspace identifier (enum :c:type:`v4l2_colorspace`)
which defines the chromaticities, the default transfer function, the
default Y'CbCr encoding and the default quantization method. The second
is the transfer function identifier (enum
-:ref:`v4l2_xfer_func <v4l2-xfer-func>`) to specify non-standard
+:c:type:`v4l2_xfer_func`) to specify non-standard
transfer functions. The third is the Y'CbCr encoding identifier (enum
-:ref:`v4l2_ycbcr_encoding <v4l2-ycbcr-encoding>`) to specify
+:c:type:`v4l2_ycbcr_encoding`) to specify
non-standard Y'CbCr encodings and the fourth is the quantization
-identifier (enum :ref:`v4l2_quantization <v4l2-quantization>`) to
+identifier (enum :c:type:`v4l2_quantization`) to
specify non-standard quantization methods. Most of the time only the
-colorspace field of struct :ref:`v4l2_pix_format <v4l2-pix-format>`
-or struct :ref:`v4l2_pix_format_mplane <v4l2-pix-format-mplane>`
+colorspace field of struct :c:type:`v4l2_pix_format`
+or struct :c:type:`v4l2_pix_format_mplane`
needs to be filled in.
-.. note:: The default R'G'B' quantization is full range for all
+.. note::
+
+ The default R'G'B' quantization is full range for all
colorspaces except for BT.2020 which uses limited range R'G'B'
quantization.
+.. tabularcolumns:: |p{6.0cm}|p{11.5cm}|
-.. _v4l2-colorspace:
+.. c:type:: v4l2_colorspace
.. flat-table:: V4L2 Colorspaces
:header-rows: 1
:stub-columns: 0
-
- - .. row 1
-
- - Identifier
-
- - Details
-
- - .. row 2
-
- - ``V4L2_COLORSPACE_DEFAULT``
-
- - The default colorspace. This can be used by applications to let
- the driver fill in the colorspace.
-
- - .. row 3
-
- - ``V4L2_COLORSPACE_SMPTE170M``
-
- - See :ref:`col-smpte-170m`.
-
- - .. row 4
-
- - ``V4L2_COLORSPACE_REC709``
-
- - See :ref:`col-rec709`.
-
- - .. row 5
-
- - ``V4L2_COLORSPACE_SRGB``
-
- - See :ref:`col-srgb`.
-
- - .. row 6
-
- - ``V4L2_COLORSPACE_ADOBERGB``
-
- - See :ref:`col-adobergb`.
-
- - .. row 7
-
- - ``V4L2_COLORSPACE_BT2020``
-
- - See :ref:`col-bt2020`.
-
- - .. row 8
-
- - ``V4L2_COLORSPACE_DCI_P3``
-
- - See :ref:`col-dcip3`.
-
- - .. row 9
-
- - ``V4L2_COLORSPACE_SMPTE240M``
-
- - See :ref:`col-smpte-240m`.
-
- - .. row 10
-
- - ``V4L2_COLORSPACE_470_SYSTEM_M``
-
- - See :ref:`col-sysm`.
-
- - .. row 11
-
- - ``V4L2_COLORSPACE_470_SYSTEM_BG``
-
- - See :ref:`col-sysbg`.
-
- - .. row 12
-
- - ``V4L2_COLORSPACE_JPEG``
-
- - See :ref:`col-jpeg`.
-
- - .. row 13
-
- - ``V4L2_COLORSPACE_RAW``
-
- - The raw colorspace. This is used for raw image capture where the
- image is minimally processed and is using the internal colorspace
- of the device. The software that processes an image using this
- 'colorspace' will have to know the internals of the capture
- device.
-
-
-
-.. _v4l2-xfer-func:
+ * - Identifier
+ - Details
+ * - ``V4L2_COLORSPACE_DEFAULT``
+ - The default colorspace. This can be used by applications to let
+ the driver fill in the colorspace.
+ * - ``V4L2_COLORSPACE_SMPTE170M``
+ - See :ref:`col-smpte-170m`.
+ * - ``V4L2_COLORSPACE_REC709``
+ - See :ref:`col-rec709`.
+ * - ``V4L2_COLORSPACE_SRGB``
+ - See :ref:`col-srgb`.
+ * - ``V4L2_COLORSPACE_ADOBERGB``
+ - See :ref:`col-adobergb`.
+ * - ``V4L2_COLORSPACE_BT2020``
+ - See :ref:`col-bt2020`.
+ * - ``V4L2_COLORSPACE_DCI_P3``
+ - See :ref:`col-dcip3`.
+ * - ``V4L2_COLORSPACE_SMPTE240M``
+ - See :ref:`col-smpte-240m`.
+ * - ``V4L2_COLORSPACE_470_SYSTEM_M``
+ - See :ref:`col-sysm`.
+ * - ``V4L2_COLORSPACE_470_SYSTEM_BG``
+ - See :ref:`col-sysbg`.
+ * - ``V4L2_COLORSPACE_JPEG``
+ - See :ref:`col-jpeg`.
+ * - ``V4L2_COLORSPACE_RAW``
+ - The raw colorspace. This is used for raw image capture where the
+ image is minimally processed and is using the internal colorspace
+ of the device. The software that processes an image using this
+ 'colorspace' will have to know the internals of the capture
+ device.
+
+
+
+.. c:type:: v4l2_xfer_func
.. flat-table:: V4L2 Transfer Function
:header-rows: 1
:stub-columns: 0
+ * - Identifier
+ - Details
+ * - ``V4L2_XFER_FUNC_DEFAULT``
+ - Use the default transfer function as defined by the colorspace.
+ * - ``V4L2_XFER_FUNC_709``
+ - Use the Rec. 709 transfer function.
+ * - ``V4L2_XFER_FUNC_SRGB``
+ - Use the sRGB transfer function.
+ * - ``V4L2_XFER_FUNC_ADOBERGB``
+ - Use the AdobeRGB transfer function.
+ * - ``V4L2_XFER_FUNC_SMPTE240M``
+ - Use the SMPTE 240M transfer function.
+ * - ``V4L2_XFER_FUNC_NONE``
+ - Do not use a transfer function (i.e. use linear RGB values).
+ * - ``V4L2_XFER_FUNC_DCI_P3``
+ - Use the DCI-P3 transfer function.
+ * - ``V4L2_XFER_FUNC_SMPTE2084``
+ - Use the SMPTE 2084 transfer function.
- - .. row 1
-
- - Identifier
-
- - Details
-
- - .. row 2
-
- - ``V4L2_XFER_FUNC_DEFAULT``
-
- - Use the default transfer function as defined by the colorspace.
-
- - .. row 3
-
- - ``V4L2_XFER_FUNC_709``
-
- - Use the Rec. 709 transfer function.
-
- - .. row 4
-
- - ``V4L2_XFER_FUNC_SRGB``
-
- - Use the sRGB transfer function.
-
- - .. row 5
- - ``V4L2_XFER_FUNC_ADOBERGB``
- - Use the AdobeRGB transfer function.
+.. c:type:: v4l2_ycbcr_encoding
- - .. row 6
-
- - ``V4L2_XFER_FUNC_SMPTE240M``
-
- - Use the SMPTE 240M transfer function.
-
- - .. row 7
-
- - ``V4L2_XFER_FUNC_NONE``
-
- - Do not use a transfer function (i.e. use linear RGB values).
-
- - .. row 8
-
- - ``V4L2_XFER_FUNC_DCI_P3``
-
- - Use the DCI-P3 transfer function.
-
- - .. row 9
-
- - ``V4L2_XFER_FUNC_SMPTE2084``
-
- - Use the SMPTE 2084 transfer function.
-
-
-
-.. _v4l2-ycbcr-encoding:
+.. tabularcolumns:: |p{6.5cm}|p{11.0cm}|
.. flat-table:: V4L2 Y'CbCr Encodings
:header-rows: 1
:stub-columns: 0
+ * - Identifier
+ - Details
+ * - ``V4L2_YCBCR_ENC_DEFAULT``
+ - Use the default Y'CbCr encoding as defined by the colorspace.
+ * - ``V4L2_YCBCR_ENC_601``
+ - Use the BT.601 Y'CbCr encoding.
+ * - ``V4L2_YCBCR_ENC_709``
+ - Use the Rec. 709 Y'CbCr encoding.
+ * - ``V4L2_YCBCR_ENC_XV601``
+ - Use the extended gamut xvYCC BT.601 encoding.
+ * - ``V4L2_YCBCR_ENC_XV709``
+ - Use the extended gamut xvYCC Rec. 709 encoding.
+ * - ``V4L2_YCBCR_ENC_BT2020``
+ - Use the default non-constant luminance BT.2020 Y'CbCr encoding.
+ * - ``V4L2_YCBCR_ENC_BT2020_CONST_LUM``
+ - Use the constant luminance BT.2020 Yc'CbcCrc encoding.
+ * - ``V4L2_YCBCR_ENC_SMPTE_240M``
+ - Use the SMPTE 240M Y'CbCr encoding.
- - .. row 1
-
- - Identifier
-
- - Details
-
- - .. row 2
-
- - ``V4L2_YCBCR_ENC_DEFAULT``
-
- - Use the default Y'CbCr encoding as defined by the colorspace.
-
- - .. row 3
-
- - ``V4L2_YCBCR_ENC_601``
-
- - Use the BT.601 Y'CbCr encoding.
-
- - .. row 4
-
- - ``V4L2_YCBCR_ENC_709``
-
- - Use the Rec. 709 Y'CbCr encoding.
-
- - .. row 5
-
- - ``V4L2_YCBCR_ENC_XV601``
-
- - Use the extended gamut xvYCC BT.601 encoding.
- - .. row 6
- - ``V4L2_YCBCR_ENC_XV709``
+.. c:type:: v4l2_quantization
- - Use the extended gamut xvYCC Rec. 709 encoding.
-
- - .. row 7
-
- - ``V4L2_YCBCR_ENC_SYCC``
-
- - Use the extended gamut sYCC encoding.
-
- - .. row 8
-
- - ``V4L2_YCBCR_ENC_BT2020``
-
- - Use the default non-constant luminance BT.2020 Y'CbCr encoding.
-
- - .. row 9
-
- - ``V4L2_YCBCR_ENC_BT2020_CONST_LUM``
-
- - Use the constant luminance BT.2020 Yc'CbcCrc encoding.
-
- - .. row 10
-
- - ``V4L2_YCBCR_ENC_SMPTE_240M``
-
- - Use the SMPTE 240M Y'CbCr encoding.
-
-
-
-.. _v4l2-quantization:
+.. tabularcolumns:: |p{6.5cm}|p{11.0cm}|
.. flat-table:: V4L2 Quantization Methods
:header-rows: 1
:stub-columns: 0
-
- - .. row 1
-
- - Identifier
-
- - Details
-
- - .. row 2
-
- - ``V4L2_QUANTIZATION_DEFAULT``
-
- - Use the default quantization encoding as defined by the
- colorspace. This is always full range for R'G'B' (except for the
- BT.2020 colorspace) and usually limited range for Y'CbCr.
-
- - .. row 3
-
- - ``V4L2_QUANTIZATION_FULL_RANGE``
-
- - Use the full range quantization encoding. I.e. the range [0…1] is
- mapped to [0…255] (with possible clipping to [1…254] to avoid the
- 0x00 and 0xff values). Cb and Cr are mapped from [-0.5…0.5] to
- [0…255] (with possible clipping to [1…254] to avoid the 0x00 and
- 0xff values).
-
- - .. row 4
-
- - ``V4L2_QUANTIZATION_LIM_RANGE``
-
- - Use the limited range quantization encoding. I.e. the range [0…1]
- is mapped to [16…235]. Cb and Cr are mapped from [-0.5…0.5] to
- [16…240].
+ * - Identifier
+ - Details
+ * - ``V4L2_QUANTIZATION_DEFAULT``
+ - Use the default quantization encoding as defined by the
+ colorspace. This is always full range for R'G'B' (except for the
+ BT.2020 colorspace) and usually limited range for Y'CbCr.
+ * - ``V4L2_QUANTIZATION_FULL_RANGE``
+ - Use the full range quantization encoding. I.e. the range [0…1] is
+ mapped to [0…255] (with possible clipping to [1…254] to avoid the
+ 0x00 and 0xff values). Cb and Cr are mapped from [-0.5…0.5] to
+ [0…255] (with possible clipping to [1…254] to avoid the 0x00 and
+ 0xff values).
+ * - ``V4L2_QUANTIZATION_LIM_RANGE``
+ - Use the limited range quantization encoding. I.e. the range [0…1]
+ is mapped to [16…235]. Cb and Cr are mapped from [-0.5…0.5] to
+ [16…240].
projects / cascardo / linux.git / blobdiff