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diff --git a/Documentation/media/uapi/v4l/pixfmt-packed-rgb.rst b/Documentation/media/uapi/v4l/pixfmt-packed-rgb.rst new file mode 100644 index 000000000..4938d9655 --- /dev/null +++ b/Documentation/media/uapi/v4l/pixfmt-packed-rgb.rst @@ -0,0 +1,863 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _packed-rgb: + +****************** +Packed RGB formats +****************** + +Description +=========== + +These formats are designed to match the pixel formats of typical PC +graphics frame buffers. They occupy 8, 16, 24 or 32 bits per pixel. +These are all packed-pixel formats, meaning all the data for a pixel lie +next to each other in memory. + +.. raw:: latex + + \begingroup + \tiny + \setlength{\tabcolsep}{2pt} + +.. tabularcolumns:: |p{2.3cm}|p{1.6cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| + + +.. _rgb-formats: + +.. flat-table:: Packed RGB Image Formats + :header-rows: 2 + :stub-columns: 0 + + * - Identifier + - Code + - :cspan:`7` Byte 0 in memory + - :cspan:`7` Byte 1 + - :cspan:`7` Byte 2 + - :cspan:`7` Byte 3 + * - + - + - 7 + - 6 + - 5 + - 4 + - 3 + - 2 + - 1 + - 0 + + - 7 + - 6 + - 5 + - 4 + - 3 + - 2 + - 1 + - 0 + + - 7 + - 6 + - 5 + - 4 + - 3 + - 2 + - 1 + - 0 + + - 7 + - 6 + - 5 + - 4 + - 3 + - 2 + - 1 + - 0 + * .. _V4L2-PIX-FMT-RGB332: + + - ``V4L2_PIX_FMT_RGB332`` + - 'RGB1' + + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`1` + - b\ :sub:`0` + - + * .. _V4L2-PIX-FMT-ARGB444: + + - ``V4L2_PIX_FMT_ARGB444`` + - 'AR12' + + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + + - a\ :sub:`3` + - a\ :sub:`2` + - a\ :sub:`1` + - a\ :sub:`0` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - + * .. _V4L2-PIX-FMT-XRGB444: + + - ``V4L2_PIX_FMT_XRGB444`` + - 'XR12' + + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + + - + - + - + - + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - + * .. _V4L2-PIX-FMT-ARGB555: + + - ``V4L2_PIX_FMT_ARGB555`` + - 'AR15' + + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + + - a + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - g\ :sub:`4` + - g\ :sub:`3` + - + * .. _V4L2-PIX-FMT-XRGB555: + + - ``V4L2_PIX_FMT_XRGB555`` + - 'XR15' + + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + + - + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - g\ :sub:`4` + - g\ :sub:`3` + - + * .. _V4L2-PIX-FMT-RGB565: + + - ``V4L2_PIX_FMT_RGB565`` + - 'RGBP' + + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - g\ :sub:`5` + - g\ :sub:`4` + - g\ :sub:`3` + - + * .. _V4L2-PIX-FMT-ARGB555X: + + - ``V4L2_PIX_FMT_ARGB555X`` + - 'AR15' | (1 << 31) + + - a + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - g\ :sub:`4` + - g\ :sub:`3` + + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + - + * .. _V4L2-PIX-FMT-XRGB555X: + + - ``V4L2_PIX_FMT_XRGB555X`` + - 'XR15' | (1 << 31) + + - + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - g\ :sub:`4` + - g\ :sub:`3` + + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + - + * .. _V4L2-PIX-FMT-RGB565X: + + - ``V4L2_PIX_FMT_RGB565X`` + - 'RGBR' + + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - g\ :sub:`5` + - g\ :sub:`4` + - g\ :sub:`3` + + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + - + * .. _V4L2-PIX-FMT-BGR24: + + - ``V4L2_PIX_FMT_BGR24`` + - 'BGR3' + + - b\ :sub:`7` + - b\ :sub:`6` + - b\ :sub:`5` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + + - g\ :sub:`7` + - g\ :sub:`6` + - g\ :sub:`5` + - g\ :sub:`4` + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + + - r\ :sub:`7` + - r\ :sub:`6` + - r\ :sub:`5` + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - + * .. _V4L2-PIX-FMT-RGB24: + + - ``V4L2_PIX_FMT_RGB24`` + - 'RGB3' + + - r\ :sub:`7` + - r\ :sub:`6` + - r\ :sub:`5` + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + + - g\ :sub:`7` + - g\ :sub:`6` + - g\ :sub:`5` + - g\ :sub:`4` + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + + - b\ :sub:`7` + - b\ :sub:`6` + - b\ :sub:`5` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + - + * .. _V4L2-PIX-FMT-BGR666: + + - ``V4L2_PIX_FMT_BGR666`` + - 'BGRH' + + - b\ :sub:`5` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + - g\ :sub:`5` + - g\ :sub:`4` + + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - r\ :sub:`5` + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + + - r\ :sub:`1` + - r\ :sub:`0` + - + - + - + - + - + - + + - + - + - + - + - + - + - + - + * .. _V4L2-PIX-FMT-ABGR32: + + - ``V4L2_PIX_FMT_ABGR32`` + - 'AR24' + + - b\ :sub:`7` + - b\ :sub:`6` + - b\ :sub:`5` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + + - g\ :sub:`7` + - g\ :sub:`6` + - g\ :sub:`5` + - g\ :sub:`4` + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + + - r\ :sub:`7` + - r\ :sub:`6` + - r\ :sub:`5` + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + + - a\ :sub:`7` + - a\ :sub:`6` + - a\ :sub:`5` + - a\ :sub:`4` + - a\ :sub:`3` + - a\ :sub:`2` + - a\ :sub:`1` + - a\ :sub:`0` + * .. _V4L2-PIX-FMT-XBGR32: + + - ``V4L2_PIX_FMT_XBGR32`` + - 'XR24' + + - b\ :sub:`7` + - b\ :sub:`6` + - b\ :sub:`5` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + + - g\ :sub:`7` + - g\ :sub:`6` + - g\ :sub:`5` + - g\ :sub:`4` + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + + - r\ :sub:`7` + - r\ :sub:`6` + - r\ :sub:`5` + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + + - + - + - + - + - + - + - + - + * .. _V4L2-PIX-FMT-ARGB32: + + - ``V4L2_PIX_FMT_ARGB32`` + - 'BA24' + + - a\ :sub:`7` + - a\ :sub:`6` + - a\ :sub:`5` + - a\ :sub:`4` + - a\ :sub:`3` + - a\ :sub:`2` + - a\ :sub:`1` + - a\ :sub:`0` + + - r\ :sub:`7` + - r\ :sub:`6` + - r\ :sub:`5` + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + + - g\ :sub:`7` + - g\ :sub:`6` + - g\ :sub:`5` + - g\ :sub:`4` + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + + - b\ :sub:`7` + - b\ :sub:`6` + - b\ :sub:`5` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + * .. _V4L2-PIX-FMT-XRGB32: + + - ``V4L2_PIX_FMT_XRGB32`` + - 'BX24' + + - + - + - + - + - + - + - + - + + - r\ :sub:`7` + - r\ :sub:`6` + - r\ :sub:`5` + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + + - g\ :sub:`7` + - g\ :sub:`6` + - g\ :sub:`5` + - g\ :sub:`4` + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + + - b\ :sub:`7` + - b\ :sub:`6` + - b\ :sub:`5` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + +.. raw:: latex + + \endgroup + +.. note:: Bit 7 is the most significant bit. + +The usage and value of the alpha bits (a) in the ARGB and ABGR formats +(collectively referred to as alpha formats) depend on the device type +and hardware operation. :ref:`Capture <capture>` devices (including +capture queues of mem-to-mem devices) fill the alpha component in +memory. When the device outputs an alpha channel the alpha component +will have a meaningful value. Otherwise, when the device doesn't output +an alpha channel but can set the alpha bit to a user-configurable value, +the :ref:`V4L2_CID_ALPHA_COMPONENT <v4l2-alpha-component>` control +is used to specify that alpha value, and the alpha component of all +pixels will be set to the value specified by that control. Otherwise a +corresponding format without an alpha component (XRGB or XBGR) must be +used instead of an alpha format. + +:ref:`Output <output>` devices (including output queues of mem-to-mem +devices and :ref:`video output overlay <osd>` devices) read the alpha +component from memory. When the device processes the alpha channel the +alpha component must be filled with meaningful values by applications. +Otherwise a corresponding format without an alpha component (XRGB or +XBGR) must be used instead of an alpha format. + +The XRGB and XBGR formats contain undefined bits (-). Applications, +devices and drivers must ignore those bits, for both +:ref:`capture` and :ref:`output` devices. + +**Byte Order.** +Each cell is one byte. + + +.. raw:: latex + + \small + +.. tabularcolumns:: |p{3.1cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}|p{0.8cm}| + +.. flat-table:: RGB byte order + :header-rows: 0 + :stub-columns: 0 + :widths: 11 3 3 3 3 3 3 3 3 3 3 3 3 + + * - start + 0: + - B\ :sub:`00` + - G\ :sub:`00` + - R\ :sub:`00` + - B\ :sub:`01` + - G\ :sub:`01` + - R\ :sub:`01` + - B\ :sub:`02` + - G\ :sub:`02` + - R\ :sub:`02` + - B\ :sub:`03` + - G\ :sub:`03` + - R\ :sub:`03` + * - start + 12: + - B\ :sub:`10` + - G\ :sub:`10` + - R\ :sub:`10` + - B\ :sub:`11` + - G\ :sub:`11` + - R\ :sub:`11` + - B\ :sub:`12` + - G\ :sub:`12` + - R\ :sub:`12` + - B\ :sub:`13` + - G\ :sub:`13` + - R\ :sub:`13` + * - start + 24: + - B\ :sub:`20` + - G\ :sub:`20` + - R\ :sub:`20` + - B\ :sub:`21` + - G\ :sub:`21` + - R\ :sub:`21` + - B\ :sub:`22` + - G\ :sub:`22` + - R\ :sub:`22` + - B\ :sub:`23` + - G\ :sub:`23` + - R\ :sub:`23` + * - start + 36: + - B\ :sub:`30` + - G\ :sub:`30` + - R\ :sub:`30` + - B\ :sub:`31` + - G\ :sub:`31` + - R\ :sub:`31` + - B\ :sub:`32` + - G\ :sub:`32` + - R\ :sub:`32` + - B\ :sub:`33` + - G\ :sub:`33` + - R\ :sub:`33` + +.. raw:: latex + + \normalsize + +Formats defined in :ref:`rgb-formats-deprecated` are deprecated and +must not be used by new drivers. They are documented here for reference. +The meaning of their alpha bits ``(a)`` are ill-defined and interpreted as in +either the corresponding ARGB or XRGB format, depending on the driver. + + +.. raw:: latex + + \begingroup + \tiny + \setlength{\tabcolsep}{2pt} + +.. tabularcolumns:: |p{2.2cm}|p{0.60cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}|p{0.22cm}| + +.. _rgb-formats-deprecated: + +.. flat-table:: Deprecated Packed RGB Image Formats + :header-rows: 2 + :stub-columns: 0 + + * - Identifier + - Code + - :cspan:`7` Byte 0 in memory + + - :cspan:`7` Byte 1 + + - :cspan:`7` Byte 2 + + - :cspan:`7` Byte 3 + * - + - + - 7 + - 6 + - 5 + - 4 + - 3 + - 2 + - 1 + - 0 + + - 7 + - 6 + - 5 + - 4 + - 3 + - 2 + - 1 + - 0 + + - 7 + - 6 + - 5 + - 4 + - 3 + - 2 + - 1 + - 0 + + - 7 + - 6 + - 5 + - 4 + - 3 + - 2 + - 1 + - 0 + * .. _V4L2-PIX-FMT-RGB444: + + - ``V4L2_PIX_FMT_RGB444`` + - 'R444' + + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + + - a\ :sub:`3` + - a\ :sub:`2` + - a\ :sub:`1` + - a\ :sub:`0` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - + * .. _V4L2-PIX-FMT-RGB555: + + - ``V4L2_PIX_FMT_RGB555`` + - 'RGBO' + + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + + - a + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - g\ :sub:`4` + - g\ :sub:`3` + - + * .. _V4L2-PIX-FMT-RGB555X: + + - ``V4L2_PIX_FMT_RGB555X`` + - 'RGBQ' + + - a + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + - g\ :sub:`4` + - g\ :sub:`3` + + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + - + * .. _V4L2-PIX-FMT-BGR32: + + - ``V4L2_PIX_FMT_BGR32`` + - 'BGR4' + + - b\ :sub:`7` + - b\ :sub:`6` + - b\ :sub:`5` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + + - g\ :sub:`7` + - g\ :sub:`6` + - g\ :sub:`5` + - g\ :sub:`4` + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + + - r\ :sub:`7` + - r\ :sub:`6` + - r\ :sub:`5` + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + + - a\ :sub:`7` + - a\ :sub:`6` + - a\ :sub:`5` + - a\ :sub:`4` + - a\ :sub:`3` + - a\ :sub:`2` + - a\ :sub:`1` + - a\ :sub:`0` + * .. _V4L2-PIX-FMT-RGB32: + + - ``V4L2_PIX_FMT_RGB32`` + - 'RGB4' + + - a\ :sub:`7` + - a\ :sub:`6` + - a\ :sub:`5` + - a\ :sub:`4` + - a\ :sub:`3` + - a\ :sub:`2` + - a\ :sub:`1` + - a\ :sub:`0` + + - r\ :sub:`7` + - r\ :sub:`6` + - r\ :sub:`5` + - r\ :sub:`4` + - r\ :sub:`3` + - r\ :sub:`2` + - r\ :sub:`1` + - r\ :sub:`0` + + - g\ :sub:`7` + - g\ :sub:`6` + - g\ :sub:`5` + - g\ :sub:`4` + - g\ :sub:`3` + - g\ :sub:`2` + - g\ :sub:`1` + - g\ :sub:`0` + + - b\ :sub:`7` + - b\ :sub:`6` + - b\ :sub:`5` + - b\ :sub:`4` + - b\ :sub:`3` + - b\ :sub:`2` + - b\ :sub:`1` + - b\ :sub:`0` + +.. raw:: latex + + \endgroup + +A test utility to determine which RGB formats a driver actually supports +is available from the LinuxTV v4l-dvb repository. See +`https://linuxtv.org/repo/ <https://linuxtv.org/repo/>`__ for access +instructions. |