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Diffstat (limited to 'Documentation/media/uapi/v4l/ext-ctrls-codec.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/ext-ctrls-codec.rst | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst index 3a0fe41549f7..0aaee04f81dd 100644 --- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst +++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst @@ -1704,6 +1704,122 @@ enum v4l2_mpeg_mfc51_video_force_frame_type - - Force a non-coded frame. +.. _v4l2-mpeg-fwht: + +``V4L2_CID_MPEG_VIDEO_FWHT_PARAMS (struct)`` + Specifies the fwht parameters (as extracted from the bitstream) for the + associated FWHT data. This includes the necessary parameters for + configuring a stateless hardware decoding pipeline for FWHT. + + .. note:: + + This compound control is not yet part of the public kernel API and + it is expected to change. + +.. c:type:: v4l2_ctrl_fwht_params + +.. cssclass:: longtable + +.. flat-table:: struct v4l2_ctrl_fwht_params + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - __u64 + - ``backward_ref_ts`` + - Timestamp of the V4L2 capture buffer to use as backward reference, used + with P-coded frames. The timestamp refers to the + ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the + :c:func:`v4l2_timeval_to_ns()` function to convert the struct + :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64. + * - __u32 + - ``version`` + - The version of the codec + * - __u32 + - ``width`` + - The width of the frame + * - __u32 + - ``height`` + - The height of the frame + * - __u32 + - ``flags`` + - The flags of the frame, see :ref:`fwht-flags`. + * - __u32 + - ``colorspace`` + - The colorspace of the frame, from enum :c:type:`v4l2_colorspace`. + * - __u32 + - ``xfer_func`` + - The transfer function, from enum :c:type:`v4l2_xfer_func`. + * - __u32 + - ``ycbcr_enc`` + - The Y'CbCr encoding, from enum :c:type:`v4l2_ycbcr_encoding`. + * - __u32 + - ``quantization`` + - The quantization range, from enum :c:type:`v4l2_quantization`. + + + +.. _fwht-flags: + +FWHT Flags +============ +.. tabularcolumns:: |p{7.0cm}|p{2.2cm}|p{8.3cm}| + +.. cssclass:: longtable + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 4 + + * - ``FWHT_FL_IS_INTERLACED`` + - 0x00000001 + - Set if this is an interlaced format + * - ``FWHT_FL_IS_BOTTOM_FIRST`` + - 0x00000002 + - Set if this is a bottom-first (NTSC) interlaced format + * - ``FWHT_FL_IS_ALTERNATE`` + - 0x00000004 + - Set if each 'frame' contains just one field + * - ``FWHT_FL_IS_BOTTOM_FIELD`` + - 0x00000008 + - If FWHT_FL_IS_ALTERNATE was set, then this is set if this 'frame' is the + bottom field, else it is the top field. + * - ``FWHT_FL_LUMA_IS_UNCOMPRESSED`` + - 0x00000010 + - Set if the luma plane is uncompressed + * - ``FWHT_FL_CB_IS_UNCOMPRESSED`` + - 0x00000020 + - Set if the cb plane is uncompressed + * - ``FWHT_FL_CR_IS_UNCOMPRESSED`` + - 0x00000040 + - Set if the cr plane is uncompressed + * - ``FWHT_FL_CHROMA_FULL_HEIGHT`` + - 0x00000080 + - Set if the chroma plane has the same height as the luma plane, + else the chroma plane is half the height of the luma plane + * - ``FWHT_FL_CHROMA_FULL_WIDTH`` + - 0x00000100 + - Set if the chroma plane has the same width as the luma plane, + else the chroma plane is half the width of the luma plane + * - ``FWHT_FL_ALPHA_IS_UNCOMPRESSED`` + - 0x00000200 + - Set if the alpha plane is uncompressed + * - ``FWHT_FL_I_FRAME`` + - 0x00000400 + - Set if this is an I-frame + * - ``FWHT_FL_COMPONENTS_NUM_MSK`` + - 0x00070000 + - A 4-values flag - the number of components - 1 + * - ``FWHT_FL_PIXENC_YUV`` + - 0x00080000 + - Set if the pixel encoding is YUV + * - ``FWHT_FL_PIXENC_RGB`` + - 0x00100000 + - Set if the pixel encoding is RGB + * - ``FWHT_FL_PIXENC_HSV`` + - 0x00180000 + - Set if the pixel encoding is HSV CX2341x MPEG Controls |