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0b0393d59e
Clarify that the expected order of scaling lists should follow the order they are listed in the H264 standard. The expected scaling list order, for 4x4: Intra Y, Intra Cb, Intra Cr, Inter Y, Inter Cb, Inter Cr, for 8x8: Intra Y, Inter Y, Intra Cb, Inter Cb, Intra Cr, Inter Cr. Also clarify that the values in a scaling list should be in matrix order, the same value order that vaapi, vdpau and nvdec use. Signed-off-by: Jonas Karlman <jonas@kwiboo.se> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
4249 lines
121 KiB
ReStructuredText
4249 lines
121 KiB
ReStructuredText
.. Permission is granted to copy, distribute and/or modify this
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.. document under the terms of the GNU Free Documentation License,
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.. Version 1.1 or any later version published by the Free Software
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.. Foundation, with no Invariant Sections, no Front-Cover Texts
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.. and no Back-Cover Texts. A copy of the license is included at
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.. Documentation/media/uapi/fdl-appendix.rst.
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..
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.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
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.. _mpeg-controls:
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***********************
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Codec Control Reference
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***********************
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Below all controls within the Codec control class are described. First
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the generic controls, then controls specific for certain hardware.
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.. note::
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These controls are applicable to all codecs and not just MPEG. The
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defines are prefixed with V4L2_CID_MPEG/V4L2_MPEG as the controls
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were originally made for MPEG codecs and later extended to cover all
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encoding formats.
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Generic Codec Controls
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======================
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.. _mpeg-control-id:
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Codec Control IDs
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-----------------
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``V4L2_CID_MPEG_CLASS (class)``
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The Codec class descriptor. Calling
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:ref:`VIDIOC_QUERYCTRL` for this control will
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return a description of this control class. This description can be
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used as the caption of a Tab page in a GUI, for example.
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.. _v4l2-mpeg-stream-type:
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``V4L2_CID_MPEG_STREAM_TYPE``
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(enum)
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enum v4l2_mpeg_stream_type -
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The MPEG-1, -2 or -4 output stream type. One cannot assume anything
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here. Each hardware MPEG encoder tends to support different subsets
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of the available MPEG stream types. This control is specific to
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multiplexed MPEG streams. The currently defined stream types are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG2_PS``
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- MPEG-2 program stream
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG2_TS``
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- MPEG-2 transport stream
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG1_SS``
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- MPEG-1 system stream
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG2_DVD``
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- MPEG-2 DVD-compatible stream
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG1_VCD``
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- MPEG-1 VCD-compatible stream
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* - ``V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD``
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- MPEG-2 SVCD-compatible stream
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``V4L2_CID_MPEG_STREAM_PID_PMT (integer)``
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Program Map Table Packet ID for the MPEG transport stream (default
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16)
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``V4L2_CID_MPEG_STREAM_PID_AUDIO (integer)``
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Audio Packet ID for the MPEG transport stream (default 256)
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``V4L2_CID_MPEG_STREAM_PID_VIDEO (integer)``
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Video Packet ID for the MPEG transport stream (default 260)
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``V4L2_CID_MPEG_STREAM_PID_PCR (integer)``
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Packet ID for the MPEG transport stream carrying PCR fields (default
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259)
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``V4L2_CID_MPEG_STREAM_PES_ID_AUDIO (integer)``
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Audio ID for MPEG PES
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``V4L2_CID_MPEG_STREAM_PES_ID_VIDEO (integer)``
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Video ID for MPEG PES
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.. _v4l2-mpeg-stream-vbi-fmt:
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``V4L2_CID_MPEG_STREAM_VBI_FMT``
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(enum)
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enum v4l2_mpeg_stream_vbi_fmt -
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Some cards can embed VBI data (e. g. Closed Caption, Teletext) into
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the MPEG stream. This control selects whether VBI data should be
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embedded, and if so, what embedding method should be used. The list
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of possible VBI formats depends on the driver. The currently defined
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VBI format types are:
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.. tabularcolumns:: |p{6.6 cm}|p{10.9cm}|
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_STREAM_VBI_FMT_NONE``
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- No VBI in the MPEG stream
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* - ``V4L2_MPEG_STREAM_VBI_FMT_IVTV``
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- VBI in private packets, IVTV format (documented in the kernel
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sources in the file
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``Documentation/media/v4l-drivers/cx2341x.rst``)
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.. _v4l2-mpeg-audio-sampling-freq:
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``V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ``
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(enum)
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enum v4l2_mpeg_audio_sampling_freq -
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MPEG Audio sampling frequency. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100``
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- 44.1 kHz
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* - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000``
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- 48 kHz
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* - ``V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000``
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- 32 kHz
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.. _v4l2-mpeg-audio-encoding:
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``V4L2_CID_MPEG_AUDIO_ENCODING``
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(enum)
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enum v4l2_mpeg_audio_encoding -
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MPEG Audio encoding. This control is specific to multiplexed MPEG
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streams. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_1``
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- MPEG-1/2 Layer I encoding
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* - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_2``
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- MPEG-1/2 Layer II encoding
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* - ``V4L2_MPEG_AUDIO_ENCODING_LAYER_3``
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- MPEG-1/2 Layer III encoding
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* - ``V4L2_MPEG_AUDIO_ENCODING_AAC``
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- MPEG-2/4 AAC (Advanced Audio Coding)
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* - ``V4L2_MPEG_AUDIO_ENCODING_AC3``
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- AC-3 aka ATSC A/52 encoding
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.. _v4l2-mpeg-audio-l1-bitrate:
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``V4L2_CID_MPEG_AUDIO_L1_BITRATE``
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(enum)
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enum v4l2_mpeg_audio_l1_bitrate -
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MPEG-1/2 Layer I bitrate. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_32K``
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- 32 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_64K``
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- 64 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_96K``
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- 96 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_128K``
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- 128 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_160K``
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- 160 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_192K``
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- 192 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_224K``
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- 224 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_256K``
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- 256 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_288K``
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- 288 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_320K``
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- 320 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_352K``
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- 352 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_384K``
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- 384 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_416K``
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- 416 kbit/s
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* - ``V4L2_MPEG_AUDIO_L1_BITRATE_448K``
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- 448 kbit/s
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.. _v4l2-mpeg-audio-l2-bitrate:
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``V4L2_CID_MPEG_AUDIO_L2_BITRATE``
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(enum)
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enum v4l2_mpeg_audio_l2_bitrate -
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MPEG-1/2 Layer II bitrate. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_32K``
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- 32 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_48K``
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- 48 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_56K``
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- 56 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_64K``
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- 64 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_80K``
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- 80 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_96K``
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- 96 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_112K``
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- 112 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_128K``
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- 128 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_160K``
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- 160 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_192K``
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- 192 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_224K``
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- 224 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_256K``
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- 256 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_320K``
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- 320 kbit/s
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* - ``V4L2_MPEG_AUDIO_L2_BITRATE_384K``
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- 384 kbit/s
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.. _v4l2-mpeg-audio-l3-bitrate:
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``V4L2_CID_MPEG_AUDIO_L3_BITRATE``
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(enum)
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enum v4l2_mpeg_audio_l3_bitrate -
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MPEG-1/2 Layer III bitrate. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_32K``
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- 32 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_40K``
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- 40 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_48K``
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- 48 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_56K``
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- 56 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_64K``
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- 64 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_80K``
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- 80 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_96K``
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- 96 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_112K``
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- 112 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_128K``
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- 128 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_160K``
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- 160 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_192K``
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- 192 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_224K``
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- 224 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_256K``
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- 256 kbit/s
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* - ``V4L2_MPEG_AUDIO_L3_BITRATE_320K``
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- 320 kbit/s
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``V4L2_CID_MPEG_AUDIO_AAC_BITRATE (integer)``
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AAC bitrate in bits per second.
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.. _v4l2-mpeg-audio-ac3-bitrate:
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``V4L2_CID_MPEG_AUDIO_AC3_BITRATE``
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(enum)
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enum v4l2_mpeg_audio_ac3_bitrate -
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AC-3 bitrate. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_32K``
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- 32 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_40K``
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- 40 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_48K``
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- 48 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_56K``
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- 56 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_64K``
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- 64 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_80K``
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- 80 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_96K``
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- 96 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_112K``
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- 112 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_128K``
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- 128 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_160K``
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- 160 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_192K``
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- 192 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_224K``
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- 224 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_256K``
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- 256 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_320K``
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- 320 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_384K``
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- 384 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_448K``
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- 448 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_512K``
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- 512 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_576K``
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- 576 kbit/s
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* - ``V4L2_MPEG_AUDIO_AC3_BITRATE_640K``
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- 640 kbit/s
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.. _v4l2-mpeg-audio-mode:
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``V4L2_CID_MPEG_AUDIO_MODE``
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(enum)
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enum v4l2_mpeg_audio_mode -
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MPEG Audio mode. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_MODE_STEREO``
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- Stereo
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* - ``V4L2_MPEG_AUDIO_MODE_JOINT_STEREO``
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- Joint Stereo
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* - ``V4L2_MPEG_AUDIO_MODE_DUAL``
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- Bilingual
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* - ``V4L2_MPEG_AUDIO_MODE_MONO``
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- Mono
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.. _v4l2-mpeg-audio-mode-extension:
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``V4L2_CID_MPEG_AUDIO_MODE_EXTENSION``
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(enum)
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enum v4l2_mpeg_audio_mode_extension -
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Joint Stereo audio mode extension. In Layer I and II they indicate
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which subbands are in intensity stereo. All other subbands are coded
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in stereo. Layer III is not (yet) supported. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4``
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- Subbands 4-31 in intensity stereo
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* - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_8``
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- Subbands 8-31 in intensity stereo
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* - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_12``
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- Subbands 12-31 in intensity stereo
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* - ``V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16``
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- Subbands 16-31 in intensity stereo
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.. _v4l2-mpeg-audio-emphasis:
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``V4L2_CID_MPEG_AUDIO_EMPHASIS``
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(enum)
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enum v4l2_mpeg_audio_emphasis -
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Audio Emphasis. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_EMPHASIS_NONE``
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- None
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* - ``V4L2_MPEG_AUDIO_EMPHASIS_50_DIV_15_uS``
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- 50/15 microsecond emphasis
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* - ``V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17``
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- CCITT J.17
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.. _v4l2-mpeg-audio-crc:
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``V4L2_CID_MPEG_AUDIO_CRC``
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(enum)
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enum v4l2_mpeg_audio_crc -
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CRC method. Possible values are:
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_AUDIO_CRC_NONE``
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- None
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* - ``V4L2_MPEG_AUDIO_CRC_CRC16``
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- 16 bit parity check
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``V4L2_CID_MPEG_AUDIO_MUTE (boolean)``
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Mutes the audio when capturing. This is not done by muting audio
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hardware, which can still produce a slight hiss, but in the encoder
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itself, guaranteeing a fixed and reproducible audio bitstream. 0 =
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unmuted, 1 = muted.
|
|
|
|
.. _v4l2-mpeg-audio-dec-playback:
|
|
|
|
``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_audio_dec_playback -
|
|
Determines how monolingual audio should be played back. Possible
|
|
values are:
|
|
|
|
|
|
|
|
.. tabularcolumns:: |p{9.8cm}|p{7.7cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_AUTO``
|
|
- Automatically determines the best playback mode.
|
|
* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_STEREO``
|
|
- Stereo playback.
|
|
* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_LEFT``
|
|
- Left channel playback.
|
|
* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_RIGHT``
|
|
- Right channel playback.
|
|
* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_MONO``
|
|
- Mono playback.
|
|
* - ``V4L2_MPEG_AUDIO_DEC_PLAYBACK_SWAPPED_STEREO``
|
|
- Stereo playback with swapped left and right channels.
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-audio-dec-multilingual-playback:
|
|
|
|
``V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_audio_dec_playback -
|
|
Determines how multilingual audio should be played back.
|
|
|
|
.. _v4l2-mpeg-video-encoding:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_ENCODING``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_encoding -
|
|
MPEG Video encoding method. This control is specific to multiplexed
|
|
MPEG streams. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_1``
|
|
- MPEG-1 Video encoding
|
|
* - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_2``
|
|
- MPEG-2 Video encoding
|
|
* - ``V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC``
|
|
- MPEG-4 AVC (H.264) Video encoding
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-aspect:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_ASPECT``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_aspect -
|
|
Video aspect. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_ASPECT_1x1``
|
|
* - ``V4L2_MPEG_VIDEO_ASPECT_4x3``
|
|
* - ``V4L2_MPEG_VIDEO_ASPECT_16x9``
|
|
* - ``V4L2_MPEG_VIDEO_ASPECT_221x100``
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_B_FRAMES (integer)``
|
|
Number of B-Frames (default 2)
|
|
|
|
``V4L2_CID_MPEG_VIDEO_GOP_SIZE (integer)``
|
|
GOP size (default 12)
|
|
|
|
``V4L2_CID_MPEG_VIDEO_GOP_CLOSURE (boolean)``
|
|
GOP closure (default 1)
|
|
|
|
``V4L2_CID_MPEG_VIDEO_PULLDOWN (boolean)``
|
|
Enable 3:2 pulldown (default 0)
|
|
|
|
.. _v4l2-mpeg-video-bitrate-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_BITRATE_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_bitrate_mode -
|
|
Video bitrate mode. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_BITRATE_MODE_VBR``
|
|
- Variable bitrate
|
|
* - ``V4L2_MPEG_VIDEO_BITRATE_MODE_CBR``
|
|
- Constant bitrate
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_BITRATE (integer)``
|
|
Video bitrate in bits per second.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_BITRATE_PEAK (integer)``
|
|
Peak video bitrate in bits per second. Must be larger or equal to
|
|
the average video bitrate. It is ignored if the video bitrate mode
|
|
is set to constant bitrate.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION (integer)``
|
|
For every captured frame, skip this many subsequent frames (default
|
|
0).
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MUTE (boolean)``
|
|
"Mutes" the video to a fixed color when capturing. This is useful
|
|
for testing, to produce a fixed video bitstream. 0 = unmuted, 1 =
|
|
muted.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MUTE_YUV (integer)``
|
|
Sets the "mute" color of the video. The supplied 32-bit integer is
|
|
interpreted as follows (bit 0 = least significant bit):
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - Bit 0:7
|
|
- V chrominance information
|
|
* - Bit 8:15
|
|
- U chrominance information
|
|
* - Bit 16:23
|
|
- Y luminance information
|
|
* - Bit 24:31
|
|
- Must be zero.
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-dec-pts:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_DEC_PTS (integer64)``
|
|
This read-only control returns the 33-bit video Presentation Time
|
|
Stamp as defined in ITU T-REC-H.222.0 and ISO/IEC 13818-1 of the
|
|
currently displayed frame. This is the same PTS as is used in
|
|
:ref:`VIDIOC_DECODER_CMD`.
|
|
|
|
.. _v4l2-mpeg-video-dec-frame:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_DEC_FRAME (integer64)``
|
|
This read-only control returns the frame counter of the frame that
|
|
is currently displayed (decoded). This value is reset to 0 whenever
|
|
the decoder is started.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE (boolean)``
|
|
If enabled the decoder expects to receive a single slice per buffer,
|
|
otherwise the decoder expects a single frame in per buffer.
|
|
Applicable to the decoder, all codecs.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)``
|
|
Enable writing sample aspect ratio in the Video Usability
|
|
Information. Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-vui-sar-idc:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_vui_sar_idc -
|
|
VUI sample aspect ratio indicator for H.264 encoding. The value is
|
|
defined in the table E-1 in the standard. Applicable to the H264
|
|
encoder.
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_UNSPECIFIED``
|
|
- Unspecified
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_1x1``
|
|
- 1x1
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_12x11``
|
|
- 12x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_10x11``
|
|
- 10x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_16x11``
|
|
- 16x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_40x33``
|
|
- 40x33
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_24x11``
|
|
- 24x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_20x11``
|
|
- 20x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_32x11``
|
|
- 32x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_80x33``
|
|
- 80x33
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_18x11``
|
|
- 18x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_15x11``
|
|
- 15x11
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_64x33``
|
|
- 64x33
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_160x99``
|
|
- 160x99
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_4x3``
|
|
- 4x3
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_3x2``
|
|
- 3x2
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_2x1``
|
|
- 2x1
|
|
* - ``V4L2_MPEG_VIDEO_H264_VUI_SAR_IDC_EXTENDED``
|
|
- Extended SAR
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH (integer)``
|
|
Extended sample aspect ratio width for H.264 VUI encoding.
|
|
Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT (integer)``
|
|
Extended sample aspect ratio height for H.264 VUI encoding.
|
|
Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-level:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_LEVEL``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_level -
|
|
The level information for the H264 video elementary stream.
|
|
Applicable to the H264 encoder. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_0``
|
|
- Level 1.0
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_1B``
|
|
- Level 1B
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_1``
|
|
- Level 1.1
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_2``
|
|
- Level 1.2
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_1_3``
|
|
- Level 1.3
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_0``
|
|
- Level 2.0
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_1``
|
|
- Level 2.1
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_2_2``
|
|
- Level 2.2
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_0``
|
|
- Level 3.0
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_1``
|
|
- Level 3.1
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_3_2``
|
|
- Level 3.2
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_0``
|
|
- Level 4.0
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_1``
|
|
- Level 4.1
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_4_2``
|
|
- Level 4.2
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_0``
|
|
- Level 5.0
|
|
* - ``V4L2_MPEG_VIDEO_H264_LEVEL_5_1``
|
|
- Level 5.1
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-mpeg2-level:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_mpeg2_level -
|
|
The level information for the MPEG2 elementary stream. Applicable to
|
|
MPEG2 codecs. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_LOW``
|
|
- Low Level (LL)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_MAIN``
|
|
- Main Level (ML)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH_1440``
|
|
- High-1440 Level (H-14)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_LEVEL_HIGH``
|
|
- High Level (HL)
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-mpeg4-level:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_mpeg4_level -
|
|
The level information for the MPEG4 elementary stream. Applicable to
|
|
the MPEG4 encoder. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0``
|
|
- Level 0
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_0B``
|
|
- Level 0b
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_1``
|
|
- Level 1
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_2``
|
|
- Level 2
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3``
|
|
- Level 3
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_3B``
|
|
- Level 3b
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_4``
|
|
- Level 4
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_LEVEL_5``
|
|
- Level 5
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-h264-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_profile -
|
|
The profile information for H264. Applicable to the H264 encoder.
|
|
Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE``
|
|
- Baseline profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_CONSTRAINED_BASELINE``
|
|
- Constrained Baseline profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_MAIN``
|
|
- Main profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_EXTENDED``
|
|
- Extended profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH``
|
|
- High profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10``
|
|
- High 10 profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422``
|
|
- High 422 profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_PREDICTIVE``
|
|
- High 444 Predictive profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_10_INTRA``
|
|
- High 10 Intra profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_422_INTRA``
|
|
- High 422 Intra profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_HIGH_444_INTRA``
|
|
- High 444 Intra profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_CAVLC_444_INTRA``
|
|
- CAVLC 444 Intra profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_BASELINE``
|
|
- Scalable Baseline profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH``
|
|
- Scalable High profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_SCALABLE_HIGH_INTRA``
|
|
- Scalable High Intra profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_STEREO_HIGH``
|
|
- Stereo High profile
|
|
* - ``V4L2_MPEG_VIDEO_H264_PROFILE_MULTIVIEW_HIGH``
|
|
- Multiview High profile
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-mpeg2-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_mpeg2_profile -
|
|
The profile information for MPEG2. Applicable to MPEG2 codecs.
|
|
Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SIMPLE``
|
|
- Simple profile (SP)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MAIN``
|
|
- Main profile (MP)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SNR_SCALABLE``
|
|
- SNR Scalable profile (SNR)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_SPATIALLY_SCALABLE``
|
|
- Spatially Scalable profile (Spt)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_HIGH``
|
|
- High profile (HP)
|
|
* - ``V4L2_MPEG_VIDEO_MPEG2_PROFILE_MULTIVIEW``
|
|
- Multi-view profile (MVP)
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-video-mpeg4-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_mpeg4_profile -
|
|
The profile information for MPEG4. Applicable to the MPEG4 encoder.
|
|
Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE``
|
|
- Simple profile
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_SIMPLE``
|
|
- Advanced Simple profile
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_CORE``
|
|
- Core profile
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_SIMPLE_SCALABLE``
|
|
- Simple Scalable profile
|
|
* - ``V4L2_MPEG_VIDEO_MPEG4_PROFILE_ADVANCED_CODING_EFFICIENCY``
|
|
-
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MAX_REF_PIC (integer)``
|
|
The maximum number of reference pictures used for encoding.
|
|
Applicable to the encoder.
|
|
|
|
.. _v4l2-mpeg-video-multi-slice-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_multi_slice_mode -
|
|
Determines how the encoder should handle division of frame into
|
|
slices. Applicable to the encoder. Possible values are:
|
|
|
|
|
|
|
|
.. tabularcolumns:: |p{9.6cm}|p{7.9cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_SINGLE``
|
|
- Single slice per frame.
|
|
* - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB``
|
|
- Multiple slices with set maximum number of macroblocks per slice.
|
|
* - ``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES``
|
|
- Multiple slice with set maximum size in bytes per slice.
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB (integer)``
|
|
The maximum number of macroblocks in a slice. Used when
|
|
``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to
|
|
``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_MB``. Applicable to the
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES (integer)``
|
|
The maximum size of a slice in bytes. Used when
|
|
``V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE`` is set to
|
|
``V4L2_MPEG_VIDEO_MULTI_SLICE_MODE_MAX_BYTES``. Applicable to the
|
|
encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-loop-filter-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_loop_filter_mode -
|
|
Loop filter mode for H264 encoder. Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{13.6cm}|p{3.9cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_ENABLED``
|
|
- Loop filter is enabled.
|
|
* - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED``
|
|
- Loop filter is disabled.
|
|
* - ``V4L2_MPEG_VIDEO_H264_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY``
|
|
- Loop filter is disabled at the slice boundary.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA (integer)``
|
|
Loop filter alpha coefficient, defined in the H264 standard.
|
|
This value corresponds to the slice_alpha_c0_offset_div2 slice header
|
|
field, and should be in the range of -6 to +6, inclusive. The actual alpha
|
|
offset FilterOffsetA is twice this value.
|
|
Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA (integer)``
|
|
Loop filter beta coefficient, defined in the H264 standard.
|
|
This corresponds to the slice_beta_offset_div2 slice header field, and
|
|
should be in the range of -6 to +6, inclusive. The actual beta offset
|
|
FilterOffsetB is twice this value.
|
|
Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-entropy-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_entropy_mode -
|
|
Entropy coding mode for H264 - CABAC/CAVALC. Applicable to the H264
|
|
encoder. Possible values are:
|
|
|
|
|
|
.. tabularcolumns:: |p{9.0cm}|p{8.5cm}|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CAVLC``
|
|
- Use CAVLC entropy coding.
|
|
* - ``V4L2_MPEG_VIDEO_H264_ENTROPY_MODE_CABAC``
|
|
- Use CABAC entropy coding.
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM (boolean)``
|
|
Enable 8X8 transform for H264. Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_CONSTRAINED_INTRA_PREDICTION (boolean)``
|
|
Enable constrained intra prediction for H264. Applicable to the H264
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_CHROMA_QP_INDEX_OFFSET (integer)``
|
|
Specify the offset that should be added to the luma quantization
|
|
parameter to determine the chroma quantization parameter. Applicable
|
|
to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB (integer)``
|
|
Cyclic intra macroblock refresh. This is the number of continuous
|
|
macroblocks refreshed every frame. Each frame a successive set of
|
|
macroblocks is refreshed until the cycle completes and starts from
|
|
the top of the frame. Applicable to H264, H263 and MPEG4 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE (boolean)``
|
|
Frame level rate control enable. If this control is disabled then
|
|
the quantization parameter for each frame type is constant and set
|
|
with appropriate controls (e.g.
|
|
``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP``). If frame rate control is
|
|
enabled then quantization parameter is adjusted to meet the chosen
|
|
bitrate. Minimum and maximum value for the quantization parameter
|
|
can be set with appropriate controls (e.g.
|
|
``V4L2_CID_MPEG_VIDEO_H263_MIN_QP``). Applicable to encoders.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE (boolean)``
|
|
Macroblock level rate control enable. Applicable to the MPEG4 and
|
|
H264 encoders.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_QPEL (boolean)``
|
|
Quarter pixel motion estimation for MPEG4. Applicable to the MPEG4
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for H263. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H263_MIN_QP (integer)``
|
|
Minimum quantization parameter for H263. Valid range: from 1 to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H263_MAX_QP (integer)``
|
|
Maximum quantization parameter for H263. Valid range: from 1 to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP (integer)``
|
|
Quantization parameter for an P frame for H263. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP (integer)``
|
|
Quantization parameter for an B frame for H263. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for H264. Valid range: from 0
|
|
to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_MIN_QP (integer)``
|
|
Minimum quantization parameter for H264. Valid range: from 0 to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_MAX_QP (integer)``
|
|
Maximum quantization parameter for H264. Valid range: from 0 to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP (integer)``
|
|
Quantization parameter for an P frame for H264. Valid range: from 0
|
|
to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP (integer)``
|
|
Quantization parameter for an B frame for H264. Valid range: from 0
|
|
to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP (integer)``
|
|
Minimum quantization parameter for the H264 I frame to limit I frame
|
|
quality to a range. Valid range: from 0 to 51. If
|
|
V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP (integer)``
|
|
Maximum quantization parameter for the H264 I frame to limit I frame
|
|
quality to a range. Valid range: from 0 to 51. If
|
|
V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP (integer)``
|
|
Minimum quantization parameter for the H264 P frame to limit P frame
|
|
quality to a range. Valid range: from 0 to 51. If
|
|
V4L2_CID_MPEG_VIDEO_H264_MIN_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP (integer)``
|
|
Maximum quantization parameter for the H264 P frame to limit P frame
|
|
quality to a range. Valid range: from 0 to 51. If
|
|
V4L2_CID_MPEG_VIDEO_H264_MAX_QP is also set, the quantization parameter
|
|
should be chosen to meet both requirements.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for MPEG4. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP (integer)``
|
|
Minimum quantization parameter for MPEG4. Valid range: from 1 to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP (integer)``
|
|
Maximum quantization parameter for MPEG4. Valid range: from 1 to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP (integer)``
|
|
Quantization parameter for an P frame for MPEG4. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP (integer)``
|
|
Quantization parameter for an B frame for MPEG4. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VBV_SIZE (integer)``
|
|
The Video Buffer Verifier size in kilobytes, it is used as a
|
|
limitation of frame skip. The VBV is defined in the standard as a
|
|
mean to verify that the produced stream will be successfully
|
|
decoded. The standard describes it as "Part of a hypothetical
|
|
decoder that is conceptually connected to the output of the encoder.
|
|
Its purpose is to provide a constraint on the variability of the
|
|
data rate that an encoder or editing process may produce.".
|
|
Applicable to the MPEG1, MPEG2, MPEG4 encoders.
|
|
|
|
.. _v4l2-mpeg-video-vbv-delay:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VBV_DELAY (integer)``
|
|
Sets the initial delay in milliseconds for VBV buffer control.
|
|
|
|
.. _v4l2-mpeg-video-hor-search-range:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE (integer)``
|
|
Horizontal search range defines maximum horizontal search area in
|
|
pixels to search and match for the present Macroblock (MB) in the
|
|
reference picture. This V4L2 control macro is used to set horizontal
|
|
search range for motion estimation module in video encoder.
|
|
|
|
.. _v4l2-mpeg-video-vert-search-range:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE (integer)``
|
|
Vertical search range defines maximum vertical search area in pixels
|
|
to search and match for the present Macroblock (MB) in the reference
|
|
picture. This V4L2 control macro is used to set vertical search
|
|
range for motion estimation module in video encoder.
|
|
|
|
.. _v4l2-mpeg-video-force-key-frame:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME (button)``
|
|
Force a key frame for the next queued buffer. Applicable to
|
|
encoders. This is a general, codec-agnostic keyframe control.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE (integer)``
|
|
The Coded Picture Buffer size in kilobytes, it is used as a
|
|
limitation of frame skip. The CPB is defined in the H264 standard as
|
|
a mean to verify that the produced stream will be successfully
|
|
decoded. Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_I_PERIOD (integer)``
|
|
Period between I-frames in the open GOP for H264. In case of an open
|
|
GOP this is the period between two I-frames. The period between IDR
|
|
(Instantaneous Decoding Refresh) frames is taken from the GOP_SIZE
|
|
control. An IDR frame, which stands for Instantaneous Decoding
|
|
Refresh is an I-frame after which no prior frames are referenced.
|
|
This means that a stream can be restarted from an IDR frame without
|
|
the need to store or decode any previous frames. Applicable to the
|
|
H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-header-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEADER_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_header_mode -
|
|
Determines whether the header is returned as the first buffer or is
|
|
it returned together with the first frame. Applicable to encoders.
|
|
Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{10.3cm}|p{7.2cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE``
|
|
- The stream header is returned separately in the first buffer.
|
|
* - ``V4L2_MPEG_VIDEO_HEADER_MODE_JOINED_WITH_1ST_FRAME``
|
|
- The stream header is returned together with the first encoded
|
|
frame.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER (boolean)``
|
|
Repeat the video sequence headers. Repeating these headers makes
|
|
random access to the video stream easier. Applicable to the MPEG1, 2
|
|
and 4 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER (boolean)``
|
|
Enabled the deblocking post processing filter for MPEG4 decoder.
|
|
Applicable to the MPEG4 decoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_RES (integer)``
|
|
vop_time_increment_resolution value for MPEG4. Applicable to the
|
|
MPEG4 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG4_VOP_TIME_INC (integer)``
|
|
vop_time_increment value for MPEG4. Applicable to the MPEG4
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING (boolean)``
|
|
Enable generation of frame packing supplemental enhancement
|
|
information in the encoded bitstream. The frame packing SEI message
|
|
contains the arrangement of L and R planes for 3D viewing.
|
|
Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0 (boolean)``
|
|
Sets current frame as frame0 in frame packing SEI. Applicable to the
|
|
H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-sei-fp-arrangement-type:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_sei_fp_arrangement_type -
|
|
Frame packing arrangement type for H264 SEI. Applicable to the H264
|
|
encoder. Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{12cm}|p{5.5cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_CHEKERBOARD``
|
|
- Pixels are alternatively from L and R.
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_COLUMN``
|
|
- L and R are interlaced by column.
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_ROW``
|
|
- L and R are interlaced by row.
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_SIDE_BY_SIDE``
|
|
- L is on the left, R on the right.
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TOP_BOTTOM``
|
|
- L is on top, R on bottom.
|
|
* - ``V4L2_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE_TEMPORAL``
|
|
- One view per frame.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO (boolean)``
|
|
Enables flexible macroblock ordering in the encoded bitstream. It is
|
|
a technique used for restructuring the ordering of macroblocks in
|
|
pictures. Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-fmo-map-type:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_fmo_map_type -
|
|
When using FMO, the map type divides the image in different scan
|
|
patterns of macroblocks. Applicable to the H264 encoder. Possible
|
|
values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. tabularcolumns:: |p{12.5cm}|p{5.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_INTERLEAVED_SLICES``
|
|
- Slices are interleaved one after other with macroblocks in run
|
|
length order.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_SCATTERED_SLICES``
|
|
- Scatters the macroblocks based on a mathematical function known to
|
|
both encoder and decoder.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_FOREGROUND_WITH_LEFT_OVER``
|
|
- Macroblocks arranged in rectangular areas or regions of interest.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_BOX_OUT``
|
|
- Slice groups grow in a cyclic way from centre to outwards.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_RASTER_SCAN``
|
|
- Slice groups grow in raster scan pattern from left to right.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_WIPE_SCAN``
|
|
- Slice groups grow in wipe scan pattern from top to bottom.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_MAP_TYPE_EXPLICIT``
|
|
- User defined map type.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP (integer)``
|
|
Number of slice groups in FMO. Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-fmo-change-direction:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_fmo_change_dir -
|
|
Specifies a direction of the slice group change for raster and wipe
|
|
maps. Applicable to the H264 encoder. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_RIGHT``
|
|
- Raster scan or wipe right.
|
|
* - ``V4L2_MPEG_VIDEO_H264_FMO_CHANGE_DIR_LEFT``
|
|
- Reverse raster scan or wipe left.
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE (integer)``
|
|
Specifies the size of the first slice group for raster and wipe map.
|
|
Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH (integer)``
|
|
Specifies the number of consecutive macroblocks for the interleaved
|
|
map. Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_ASO (boolean)``
|
|
Enables arbitrary slice ordering in encoded bitstream. Applicable to
|
|
the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER (integer)``
|
|
Specifies the slice order in ASO. Applicable to the H264 encoder.
|
|
The supplied 32-bit integer is interpreted as follows (bit 0 = least
|
|
significant bit):
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - Bit 0:15
|
|
- Slice ID
|
|
* - Bit 16:32
|
|
- Slice position or order
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING (boolean)``
|
|
Enables H264 hierarchical coding. Applicable to the H264 encoder.
|
|
|
|
.. _v4l2-mpeg-video-h264-hierarchical-coding-type:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_h264_hierarchical_coding_type -
|
|
Specifies the hierarchical coding type. Applicable to the H264
|
|
encoder. Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_B``
|
|
- Hierarchical B coding.
|
|
* - ``V4L2_MPEG_VIDEO_H264_HIERARCHICAL_CODING_P``
|
|
- Hierarchical P coding.
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER (integer)``
|
|
Specifies the number of hierarchical coding layers. Applicable to
|
|
the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP (integer)``
|
|
Specifies a user defined QP for each layer. Applicable to the H264
|
|
encoder. The supplied 32-bit integer is interpreted as follows (bit
|
|
0 = least significant bit):
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - Bit 0:15
|
|
- QP value
|
|
* - Bit 16:32
|
|
- Layer number
|
|
|
|
|
|
.. _v4l2-mpeg-h264:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_SPS (struct)``
|
|
Specifies the sequence parameter set (as extracted from the
|
|
bitstream) for the associated H264 slice data. This includes the
|
|
necessary parameters for configuring a stateless hardware decoding
|
|
pipeline for H264. The bitstream parameters are defined according
|
|
to :ref:`h264`, section 7.4.2.1.1 "Sequence Parameter Set Data
|
|
Semantics". For further documentation, refer to the above
|
|
specification, unless there is an explicit comment stating
|
|
otherwise.
|
|
|
|
.. note::
|
|
|
|
This compound control is not yet part of the public kernel API and
|
|
it is expected to change.
|
|
|
|
.. c:type:: v4l2_ctrl_h264_sps
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_ctrl_h264_sps
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u8
|
|
- ``profile_idc``
|
|
-
|
|
* - __u8
|
|
- ``constraint_set_flags``
|
|
- See :ref:`Sequence Parameter Set Constraints Set Flags <h264_sps_constraints_set_flags>`
|
|
* - __u8
|
|
- ``level_idc``
|
|
-
|
|
* - __u8
|
|
- ``seq_parameter_set_id``
|
|
-
|
|
* - __u8
|
|
- ``chroma_format_idc``
|
|
-
|
|
* - __u8
|
|
- ``bit_depth_luma_minus8``
|
|
-
|
|
* - __u8
|
|
- ``bit_depth_chroma_minus8``
|
|
-
|
|
* - __u8
|
|
- ``log2_max_frame_num_minus4``
|
|
-
|
|
* - __u8
|
|
- ``pic_order_cnt_type``
|
|
-
|
|
* - __u8
|
|
- ``log2_max_pic_order_cnt_lsb_minus4``
|
|
-
|
|
* - __u8
|
|
- ``max_num_ref_frames``
|
|
-
|
|
* - __u8
|
|
- ``num_ref_frames_in_pic_order_cnt_cycle``
|
|
-
|
|
* - __s32
|
|
- ``offset_for_ref_frame[255]``
|
|
-
|
|
* - __s32
|
|
- ``offset_for_non_ref_pic``
|
|
-
|
|
* - __s32
|
|
- ``offset_for_top_to_bottom_field``
|
|
-
|
|
* - __u16
|
|
- ``pic_width_in_mbs_minus1``
|
|
-
|
|
* - __u16
|
|
- ``pic_height_in_map_units_minus1``
|
|
-
|
|
* - __u32
|
|
- ``flags``
|
|
- See :ref:`Sequence Parameter Set Flags <h264_sps_flags>`
|
|
|
|
.. _h264_sps_constraints_set_flags:
|
|
|
|
``Sequence Parameter Set Constraints Set Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_H264_SPS_CONSTRAINT_SET0_FLAG``
|
|
- 0x00000001
|
|
-
|
|
* - ``V4L2_H264_SPS_CONSTRAINT_SET1_FLAG``
|
|
- 0x00000002
|
|
-
|
|
* - ``V4L2_H264_SPS_CONSTRAINT_SET2_FLAG``
|
|
- 0x00000004
|
|
-
|
|
* - ``V4L2_H264_SPS_CONSTRAINT_SET3_FLAG``
|
|
- 0x00000008
|
|
-
|
|
* - ``V4L2_H264_SPS_CONSTRAINT_SET4_FLAG``
|
|
- 0x00000010
|
|
-
|
|
* - ``V4L2_H264_SPS_CONSTRAINT_SET5_FLAG``
|
|
- 0x00000020
|
|
-
|
|
|
|
.. _h264_sps_flags:
|
|
|
|
``Sequence Parameter Set Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE``
|
|
- 0x00000001
|
|
-
|
|
* - ``V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS``
|
|
- 0x00000002
|
|
-
|
|
* - ``V4L2_H264_SPS_FLAG_DELTA_PIC_ORDER_ALWAYS_ZERO``
|
|
- 0x00000004
|
|
-
|
|
* - ``V4L2_H264_SPS_FLAG_GAPS_IN_FRAME_NUM_VALUE_ALLOWED``
|
|
- 0x00000008
|
|
-
|
|
* - ``V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY``
|
|
- 0x00000010
|
|
-
|
|
* - ``V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD``
|
|
- 0x00000020
|
|
-
|
|
* - ``V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE``
|
|
- 0x00000040
|
|
-
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_PPS (struct)``
|
|
Specifies the picture parameter set (as extracted from the
|
|
bitstream) for the associated H264 slice data. This includes the
|
|
necessary parameters for configuring a stateless hardware decoding
|
|
pipeline for H264. The bitstream parameters are defined according
|
|
to :ref:`h264`, section 7.4.2.2 "Picture Parameter Set RBSP
|
|
Semantics". For further documentation, refer to the above
|
|
specification, unless there is an explicit comment stating
|
|
otherwise.
|
|
|
|
.. note::
|
|
|
|
This compound control is not yet part of the public kernel API and
|
|
it is expected to change.
|
|
|
|
.. c:type:: v4l2_ctrl_h264_pps
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_ctrl_h264_pps
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u8
|
|
- ``pic_parameter_set_id``
|
|
-
|
|
* - __u8
|
|
- ``seq_parameter_set_id``
|
|
-
|
|
* - __u8
|
|
- ``num_slice_groups_minus1``
|
|
-
|
|
* - __u8
|
|
- ``num_ref_idx_l0_default_active_minus1``
|
|
-
|
|
* - __u8
|
|
- ``num_ref_idx_l1_default_active_minus1``
|
|
-
|
|
* - __u8
|
|
- ``weighted_bipred_idc``
|
|
-
|
|
* - __s8
|
|
- ``pic_init_qp_minus26``
|
|
-
|
|
* - __s8
|
|
- ``pic_init_qs_minus26``
|
|
-
|
|
* - __s8
|
|
- ``chroma_qp_index_offset``
|
|
-
|
|
* - __s8
|
|
- ``second_chroma_qp_index_offset``
|
|
-
|
|
* - __u16
|
|
- ``flags``
|
|
- See :ref:`Picture Parameter Set Flags <h264_pps_flags>`
|
|
|
|
.. _h264_pps_flags:
|
|
|
|
``Picture Parameter Set Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE``
|
|
- 0x00000001
|
|
-
|
|
* - ``V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT``
|
|
- 0x00000002
|
|
-
|
|
* - ``V4L2_H264_PPS_FLAG_WEIGHTED_PRED``
|
|
- 0x00000004
|
|
-
|
|
* - ``V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT``
|
|
- 0x00000008
|
|
-
|
|
* - ``V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED``
|
|
- 0x00000010
|
|
-
|
|
* - ``V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT``
|
|
- 0x00000020
|
|
-
|
|
* - ``V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE``
|
|
- 0x00000040
|
|
-
|
|
* - ``V4L2_H264_PPS_FLAG_PIC_SCALING_MATRIX_PRESENT``
|
|
- 0x00000080
|
|
-
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX (struct)``
|
|
Specifies the scaling matrix (as extracted from the bitstream) for
|
|
the associated H264 slice data. The bitstream parameters are
|
|
defined according to :ref:`h264`, section 7.4.2.1.1.1 "Scaling
|
|
List Semantics". For further documentation, refer to the above
|
|
specification, unless there is an explicit comment stating
|
|
otherwise.
|
|
|
|
.. note::
|
|
|
|
This compound control is not yet part of the public kernel API and
|
|
it is expected to change.
|
|
|
|
.. c:type:: v4l2_ctrl_h264_scaling_matrix
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_ctrl_h264_scaling_matrix
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u8
|
|
- ``scaling_list_4x4[6][16]``
|
|
- Scaling matrix after applying the inverse scanning process.
|
|
Expected list order is Intra Y, Intra Cb, Intra Cr, Inter Y,
|
|
Inter Cb, Inter Cr.
|
|
* - __u8
|
|
- ``scaling_list_8x8[6][64]``
|
|
- Scaling matrix after applying the inverse scanning process.
|
|
Expected list order is Intra Y, Inter Y, Intra Cb, Inter Cb,
|
|
Intra Cr, Inter Cr.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS (struct)``
|
|
Specifies the slice parameters (as extracted from the bitstream)
|
|
for the associated H264 slice data. This includes the necessary
|
|
parameters for configuring a stateless hardware decoding pipeline
|
|
for H264. The bitstream parameters are defined according to
|
|
:ref:`h264`, section 7.4.3 "Slice Header Semantics". For further
|
|
documentation, refer to the above specification, unless there is
|
|
an explicit comment stating otherwise.
|
|
|
|
.. note::
|
|
|
|
This compound control is not yet part of the public kernel API
|
|
and it is expected to change.
|
|
|
|
This structure is expected to be passed as an array, with one
|
|
entry for each slice included in the bitstream buffer.
|
|
|
|
.. c:type:: v4l2_ctrl_h264_slice_params
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_ctrl_h264_slice_params
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u32
|
|
- ``size``
|
|
-
|
|
* - __u32
|
|
- ``start_byte_offset``
|
|
Offset (in bytes) from the beginning of the OUTPUT buffer to the start
|
|
of the slice. If the slice starts with a start code, then this is the
|
|
offset to such start code. When operating in slice-based decoding mode
|
|
(see :c:type:`v4l2_mpeg_video_h264_decode_mode`), this field should
|
|
be set to 0. When operating in frame-based decoding mode, this field
|
|
should be 0 for the first slice.
|
|
* - __u32
|
|
- ``header_bit_size``
|
|
-
|
|
* - __u16
|
|
- ``first_mb_in_slice``
|
|
-
|
|
* - __u8
|
|
- ``slice_type``
|
|
-
|
|
* - __u8
|
|
- ``pic_parameter_set_id``
|
|
-
|
|
* - __u8
|
|
- ``colour_plane_id``
|
|
-
|
|
* - __u8
|
|
- ``redundant_pic_cnt``
|
|
-
|
|
* - __u16
|
|
- ``frame_num``
|
|
-
|
|
* - __u16
|
|
- ``idr_pic_id``
|
|
-
|
|
* - __u16
|
|
- ``pic_order_cnt_lsb``
|
|
-
|
|
* - __s32
|
|
- ``delta_pic_order_cnt_bottom``
|
|
-
|
|
* - __s32
|
|
- ``delta_pic_order_cnt0``
|
|
-
|
|
* - __s32
|
|
- ``delta_pic_order_cnt1``
|
|
-
|
|
* - struct :c:type:`v4l2_h264_pred_weight_table`
|
|
- ``pred_weight_table``
|
|
-
|
|
* - __u32
|
|
- ``dec_ref_pic_marking_bit_size``
|
|
- Size in bits of the dec_ref_pic_marking() syntax element.
|
|
* - __u32
|
|
- ``pic_order_cnt_bit_size``
|
|
-
|
|
* - __u8
|
|
- ``cabac_init_idc``
|
|
-
|
|
* - __s8
|
|
- ``slice_qp_delta``
|
|
-
|
|
* - __s8
|
|
- ``slice_qs_delta``
|
|
-
|
|
* - __u8
|
|
- ``disable_deblocking_filter_idc``
|
|
-
|
|
* - __s8
|
|
- ``slice_alpha_c0_offset_div2``
|
|
-
|
|
* - __s8
|
|
- ``slice_beta_offset_div2``
|
|
-
|
|
* - __u8
|
|
- ``num_ref_idx_l0_active_minus1``
|
|
- If num_ref_idx_active_override_flag is not set, this field must be
|
|
set to the value of num_ref_idx_l0_default_active_minus1.
|
|
* - __u8
|
|
- ``num_ref_idx_l1_active_minus1``
|
|
- If num_ref_idx_active_override_flag is not set, this field must be
|
|
set to the value of num_ref_idx_l1_default_active_minus1.
|
|
* - __u32
|
|
- ``slice_group_change_cycle``
|
|
-
|
|
* - __u8
|
|
- ``ref_pic_list0[32]``
|
|
- Reference picture list after applying the per-slice modifications
|
|
* - __u8
|
|
- ``ref_pic_list1[32]``
|
|
- Reference picture list after applying the per-slice modifications
|
|
* - __u32
|
|
- ``flags``
|
|
- See :ref:`Slice Parameter Flags <h264_slice_flags>`
|
|
|
|
.. _h264_slice_flags:
|
|
|
|
``Slice Parameter Set Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_H264_SLICE_FLAG_FIELD_PIC``
|
|
- 0x00000001
|
|
-
|
|
* - ``V4L2_H264_SLICE_FLAG_BOTTOM_FIELD``
|
|
- 0x00000002
|
|
-
|
|
* - ``V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED``
|
|
- 0x00000004
|
|
-
|
|
* - ``V4L2_H264_SLICE_FLAG_SP_FOR_SWITCH``
|
|
- 0x00000008
|
|
-
|
|
|
|
``Prediction Weight Table``
|
|
|
|
The bitstream parameters are defined according to :ref:`h264`,
|
|
section 7.4.3.2 "Prediction Weight Table Semantics". For further
|
|
documentation, refer to the above specification, unless there is
|
|
an explicit comment stating otherwise.
|
|
|
|
.. c:type:: v4l2_h264_pred_weight_table
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_h264_pred_weight_table
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u16
|
|
- ``luma_log2_weight_denom``
|
|
-
|
|
* - __u16
|
|
- ``chroma_log2_weight_denom``
|
|
-
|
|
* - struct :c:type:`v4l2_h264_weight_factors`
|
|
- ``weight_factors[2]``
|
|
- The weight factors at index 0 are the weight factors for the reference
|
|
list 0, the one at index 1 for the reference list 1.
|
|
|
|
.. c:type:: v4l2_h264_weight_factors
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_h264_weight_factors
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __s16
|
|
- ``luma_weight[32]``
|
|
-
|
|
* - __s16
|
|
- ``luma_offset[32]``
|
|
-
|
|
* - __s16
|
|
- ``chroma_weight[32][2]``
|
|
-
|
|
* - __s16
|
|
- ``chroma_offset[32][2]``
|
|
-
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS (struct)``
|
|
Specifies the decode parameters (as extracted from the bitstream)
|
|
for the associated H264 slice data. This includes the necessary
|
|
parameters for configuring a stateless hardware decoding pipeline
|
|
for H264. The bitstream parameters are defined according to
|
|
:ref:`h264`. For further documentation, refer to the above
|
|
specification, unless there is an explicit comment stating
|
|
otherwise.
|
|
|
|
.. note::
|
|
|
|
This compound control is not yet part of the public kernel API and
|
|
it is expected to change.
|
|
|
|
.. c:type:: v4l2_ctrl_h264_decode_params
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_ctrl_h264_decode_params
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - struct :c:type:`v4l2_h264_dpb_entry`
|
|
- ``dpb[16]``
|
|
-
|
|
* - __u16
|
|
- ``num_slices``
|
|
- Number of slices needed to decode the current frame/field. When
|
|
operating in slice-based decoding mode (see
|
|
:c:type:`v4l2_mpeg_video_h264_decode_mode`), this field
|
|
should always be set to one.
|
|
* - __u16
|
|
- ``nal_ref_idc``
|
|
- NAL reference ID value coming from the NAL Unit header
|
|
* - __s32
|
|
- ``top_field_order_cnt``
|
|
- Picture Order Count for the coded top field
|
|
* - __s32
|
|
- ``bottom_field_order_cnt``
|
|
- Picture Order Count for the coded bottom field
|
|
* - __u32
|
|
- ``flags``
|
|
- See :ref:`Decode Parameters Flags <h264_decode_params_flags>`
|
|
|
|
.. _h264_decode_params_flags:
|
|
|
|
``Decode Parameters Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC``
|
|
- 0x00000001
|
|
- That picture is an IDR picture
|
|
|
|
.. c:type:: v4l2_h264_dpb_entry
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_h264_dpb_entry
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u64
|
|
- ``reference_ts``
|
|
- Timestamp of the V4L2 capture buffer to use as reference, used
|
|
with B-coded and 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.
|
|
* - __u16
|
|
- ``frame_num``
|
|
-
|
|
* - __u16
|
|
- ``pic_num``
|
|
-
|
|
* - __s32
|
|
- ``top_field_order_cnt``
|
|
-
|
|
* - __s32
|
|
- ``bottom_field_order_cnt``
|
|
-
|
|
* - __u32
|
|
- ``flags``
|
|
- See :ref:`DPB Entry Flags <h264_dpb_flags>`
|
|
|
|
.. _h264_dpb_flags:
|
|
|
|
``DPB Entries Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_H264_DPB_ENTRY_FLAG_VALID``
|
|
- 0x00000001
|
|
- The DPB entry is valid and should be considered
|
|
* - ``V4L2_H264_DPB_ENTRY_FLAG_ACTIVE``
|
|
- 0x00000002
|
|
- The DPB entry is currently being used as a reference frame
|
|
* - ``V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM``
|
|
- 0x00000004
|
|
- The DPB entry is a long term reference frame
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE (enum)``
|
|
Specifies the decoding mode to use. Currently exposes slice-based and
|
|
frame-based decoding but new modes might be added later on.
|
|
This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE
|
|
pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE
|
|
are required to set this control in order to specify the decoding mode
|
|
that is expected for the buffer.
|
|
Drivers may expose a single or multiple decoding modes, depending
|
|
on what they can support.
|
|
|
|
.. note::
|
|
|
|
This menu control is not yet part of the public kernel API and
|
|
it is expected to change.
|
|
|
|
.. c:type:: v4l2_mpeg_video_h264_decode_mode
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_DECODE_MODE_SLICE_BASED``
|
|
- 0
|
|
- Decoding is done at the slice granularity.
|
|
In this mode, ``num_slices`` field in struct
|
|
:c:type:`v4l2_ctrl_h264_decode_params` should be set to 1,
|
|
and ``start_byte_offset`` in struct
|
|
:c:type:`v4l2_ctrl_h264_slice_params` should be set to 0.
|
|
The OUTPUT buffer must contain a single slice.
|
|
* - ``V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED``
|
|
- 1
|
|
- Decoding is done at the frame granularity.
|
|
In this mode, ``num_slices`` field in struct
|
|
:c:type:`v4l2_ctrl_h264_decode_params` should be set to the number
|
|
of slices in the frame, and ``start_byte_offset`` in struct
|
|
:c:type:`v4l2_ctrl_h264_slice_params` should be set accordingly
|
|
for each slice. For the first slice, ``start_byte_offset`` should
|
|
be zero.
|
|
The OUTPUT buffer must contain all slices needed to decode the
|
|
frame. The OUTPUT buffer must also contain both fields.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_H264_START_CODE (enum)``
|
|
Specifies the H264 slice start code expected for each slice.
|
|
This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE
|
|
pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE
|
|
are required to set this control in order to specify the start code
|
|
that is expected for the buffer.
|
|
Drivers may expose a single or multiple start codes, depending
|
|
on what they can support.
|
|
|
|
.. note::
|
|
|
|
This menu control is not yet part of the public kernel API and
|
|
it is expected to change.
|
|
|
|
.. c:type:: v4l2_mpeg_video_h264_start_code
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_MPEG_VIDEO_H264_START_CODE_NONE``
|
|
- 0
|
|
- Selecting this value specifies that H264 slices are passed
|
|
to the driver without any start code.
|
|
* - ``V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B``
|
|
- 1
|
|
- Selecting this value specifies that H264 slices are expected
|
|
to be prefixed by Annex B start codes. According to :ref:`h264`
|
|
valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001.
|
|
|
|
.. _v4l2-mpeg-mpeg2:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS (struct)``
|
|
Specifies the slice parameters (as extracted from the bitstream) for the
|
|
associated MPEG-2 slice data. This includes the necessary parameters for
|
|
configuring a stateless hardware decoding pipeline for MPEG-2.
|
|
The bitstream parameters are defined according to :ref:`mpeg2part2`.
|
|
|
|
.. note::
|
|
|
|
This compound control is not yet part of the public kernel API and
|
|
it is expected to change.
|
|
|
|
.. c:type:: v4l2_ctrl_mpeg2_slice_params
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
|
|
|
|
.. flat-table:: struct v4l2_ctrl_mpeg2_slice_params
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u32
|
|
- ``bit_size``
|
|
- Size (in bits) of the current slice data.
|
|
* - __u32
|
|
- ``data_bit_offset``
|
|
- Offset (in bits) to the video data in the current slice data.
|
|
* - struct :c:type:`v4l2_mpeg2_sequence`
|
|
- ``sequence``
|
|
- Structure with MPEG-2 sequence metadata, merging relevant fields from
|
|
the sequence header and sequence extension parts of the bitstream.
|
|
* - struct :c:type:`v4l2_mpeg2_picture`
|
|
- ``picture``
|
|
- Structure with MPEG-2 picture metadata, merging relevant fields from
|
|
the picture header and picture coding extension parts of the bitstream.
|
|
* - __u64
|
|
- ``backward_ref_ts``
|
|
- Timestamp of the V4L2 capture buffer to use as backward reference, used
|
|
with B-coded and 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.
|
|
* - __u64
|
|
- ``forward_ref_ts``
|
|
- Timestamp for the V4L2 capture buffer to use as forward reference, used
|
|
with B-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
|
|
- ``quantiser_scale_code``
|
|
- Code used to determine the quantization scale to use for the IDCT.
|
|
|
|
.. c:type:: v4l2_mpeg2_sequence
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
|
|
|
|
.. flat-table:: struct v4l2_mpeg2_sequence
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u16
|
|
- ``horizontal_size``
|
|
- The width of the displayable part of the frame's luminance component.
|
|
* - __u16
|
|
- ``vertical_size``
|
|
- The height of the displayable part of the frame's luminance component.
|
|
* - __u32
|
|
- ``vbv_buffer_size``
|
|
- Used to calculate the required size of the video buffering verifier,
|
|
defined (in bits) as: 16 * 1024 * vbv_buffer_size.
|
|
* - __u16
|
|
- ``profile_and_level_indication``
|
|
- The current profile and level indication as extracted from the
|
|
bitstream.
|
|
* - __u8
|
|
- ``progressive_sequence``
|
|
- Indication that all the frames for the sequence are progressive instead
|
|
of interlaced.
|
|
* - __u8
|
|
- ``chroma_format``
|
|
- The chrominance sub-sampling format (1: 4:2:0, 2: 4:2:2, 3: 4:4:4).
|
|
|
|
.. c:type:: v4l2_mpeg2_picture
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
|
|
|
|
.. flat-table:: struct v4l2_mpeg2_picture
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u8
|
|
- ``picture_coding_type``
|
|
- Picture coding type for the frame covered by the current slice
|
|
(V4L2_MPEG2_PICTURE_CODING_TYPE_I, V4L2_MPEG2_PICTURE_CODING_TYPE_P or
|
|
V4L2_MPEG2_PICTURE_CODING_TYPE_B).
|
|
* - __u8
|
|
- ``f_code[2][2]``
|
|
- Motion vector codes.
|
|
* - __u8
|
|
- ``intra_dc_precision``
|
|
- Precision of Discrete Cosine transform (0: 8 bits precision,
|
|
1: 9 bits precision, 2: 10 bits precision, 3: 11 bits precision).
|
|
* - __u8
|
|
- ``picture_structure``
|
|
- Picture structure (1: interlaced top field, 2: interlaced bottom field,
|
|
3: progressive frame).
|
|
* - __u8
|
|
- ``top_field_first``
|
|
- If set to 1 and interlaced stream, top field is output first.
|
|
* - __u8
|
|
- ``frame_pred_frame_dct``
|
|
- If set to 1, only frame-DCT and frame prediction are used.
|
|
* - __u8
|
|
- ``concealment_motion_vectors``
|
|
- If set to 1, motion vectors are coded for intra macroblocks.
|
|
* - __u8
|
|
- ``q_scale_type``
|
|
- This flag affects the inverse quantization process.
|
|
* - __u8
|
|
- ``intra_vlc_format``
|
|
- This flag affects the decoding of transform coefficient data.
|
|
* - __u8
|
|
- ``alternate_scan``
|
|
- This flag affects the decoding of transform coefficient data.
|
|
* - __u8
|
|
- ``repeat_first_field``
|
|
- This flag affects the decoding process of progressive frames.
|
|
* - __u16
|
|
- ``progressive_frame``
|
|
- Indicates whether the current frame is progressive.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION (struct)``
|
|
Specifies quantization matrices (as extracted from the bitstream) for the
|
|
associated MPEG-2 slice data.
|
|
|
|
.. note::
|
|
|
|
This compound control is not yet part of the public kernel API and
|
|
it is expected to change.
|
|
|
|
.. c:type:: v4l2_ctrl_mpeg2_quantization
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. tabularcolumns:: |p{1.2cm}|p{8.0cm}|p{7.4cm}|
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. flat-table:: struct v4l2_ctrl_mpeg2_quantization
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u8
|
|
- ``load_intra_quantiser_matrix``
|
|
- One bit to indicate whether to load the ``intra_quantiser_matrix`` data.
|
|
* - __u8
|
|
- ``load_non_intra_quantiser_matrix``
|
|
- One bit to indicate whether to load the ``non_intra_quantiser_matrix``
|
|
data.
|
|
* - __u8
|
|
- ``load_chroma_intra_quantiser_matrix``
|
|
- One bit to indicate whether to load the
|
|
``chroma_intra_quantiser_matrix`` data, only relevant for non-4:2:0 YUV
|
|
formats.
|
|
* - __u8
|
|
- ``load_chroma_non_intra_quantiser_matrix``
|
|
- One bit to indicate whether to load the
|
|
``chroma_non_intra_quantiser_matrix`` data, only relevant for non-4:2:0
|
|
YUV formats.
|
|
* - __u8
|
|
- ``intra_quantiser_matrix[64]``
|
|
- The quantization matrix coefficients for intra-coded frames, in zigzag
|
|
scanning order. It is relevant for both luma and chroma components,
|
|
although it can be superseded by the chroma-specific matrix for
|
|
non-4:2:0 YUV formats.
|
|
* - __u8
|
|
- ``non_intra_quantiser_matrix[64]``
|
|
- The quantization matrix coefficients for non-intra-coded frames, in
|
|
zigzag scanning order. It is relevant for both luma and chroma
|
|
components, although it can be superseded by the chroma-specific matrix
|
|
for non-4:2:0 YUV formats.
|
|
* - __u8
|
|
- ``chroma_intra_quantiser_matrix[64]``
|
|
- The quantization matrix coefficients for the chominance component of
|
|
intra-coded frames, in zigzag scanning order. Only relevant for
|
|
non-4:2:0 YUV formats.
|
|
* - __u8
|
|
- ``chroma_non_intra_quantiser_matrix[64]``
|
|
- The quantization matrix coefficients for the chrominance component of
|
|
non-intra-coded frames, in zigzag scanning order. Only relevant for
|
|
non-4:2:0 YUV formats.
|
|
|
|
``V4L2_CID_FWHT_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for FWHT. Valid range: from 1
|
|
to 31.
|
|
|
|
``V4L2_CID_FWHT_P_FRAME_QP (integer)``
|
|
Quantization parameter for a P frame for FWHT. Valid range: from 1
|
|
to 31.
|
|
|
|
.. _v4l2-mpeg-vp8:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER (struct)``
|
|
Specifies the frame parameters for the associated VP8 parsed frame data.
|
|
This includes the necessary parameters for
|
|
configuring a stateless hardware decoding pipeline for VP8.
|
|
The bitstream parameters are defined according to :ref:`vp8`.
|
|
|
|
.. note::
|
|
|
|
This compound control is not yet part of the public kernel API and
|
|
it is expected to change.
|
|
|
|
.. c:type:: v4l2_ctrl_vp8_frame_header
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
|
|
|
|
.. flat-table:: struct v4l2_ctrl_vp8_frame_header
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - struct :c:type:`v4l2_vp8_segment_header`
|
|
- ``segment_header``
|
|
- Structure with segment-based adjustments metadata.
|
|
* - struct :c:type:`v4l2_vp8_loopfilter_header`
|
|
- ``loopfilter_header``
|
|
- Structure with loop filter level adjustments metadata.
|
|
* - struct :c:type:`v4l2_vp8_quantization_header`
|
|
- ``quant_header``
|
|
- Structure with VP8 dequantization indices metadata.
|
|
* - struct :c:type:`v4l2_vp8_entropy_header`
|
|
- ``entropy_header``
|
|
- Structure with VP8 entropy coder probabilities metadata.
|
|
* - struct :c:type:`v4l2_vp8_entropy_coder_state`
|
|
- ``coder_state``
|
|
- Structure with VP8 entropy coder state.
|
|
* - __u16
|
|
- ``width``
|
|
- The width of the frame. Must be set for all frames.
|
|
* - __u16
|
|
- ``height``
|
|
- The height of the frame. Must be set for all frames.
|
|
* - __u8
|
|
- ``horizontal_scale``
|
|
- Horizontal scaling factor.
|
|
* - __u8
|
|
- ``vertical_scaling factor``
|
|
- Vertical scale.
|
|
* - __u8
|
|
- ``version``
|
|
- Bitstream version.
|
|
* - __u8
|
|
- ``prob_skip_false``
|
|
- Indicates the probability that the macroblock is not skipped.
|
|
* - __u8
|
|
- ``prob_intra``
|
|
- Indicates the probability that a macroblock is intra-predicted.
|
|
* - __u8
|
|
- ``prob_last``
|
|
- Indicates the probability that the last reference frame is used
|
|
for inter-prediction
|
|
* - __u8
|
|
- ``prob_gf``
|
|
- Indicates the probability that the golden reference frame is used
|
|
for inter-prediction
|
|
* - __u8
|
|
- ``num_dct_parts``
|
|
- Number of DCT coefficients partitions. Must be one of: 1, 2, 4, or 8.
|
|
* - __u32
|
|
- ``first_part_size``
|
|
- Size of the first partition, i.e. the control partition.
|
|
* - __u32
|
|
- ``first_part_header_bits``
|
|
- Size in bits of the first partition header portion.
|
|
* - __u32
|
|
- ``dct_part_sizes[8]``
|
|
- DCT coefficients sizes.
|
|
* - __u64
|
|
- ``last_frame_ts``
|
|
- Timestamp for the V4L2 capture buffer to use as last reference frame, used
|
|
with inter-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.
|
|
* - __u64
|
|
- ``golden_frame_ts``
|
|
- Timestamp for the V4L2 capture buffer to use as last reference frame, used
|
|
with inter-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.
|
|
* - __u64
|
|
- ``alt_frame_ts``
|
|
- Timestamp for the V4L2 capture buffer to use as alternate reference frame, used
|
|
with inter-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.
|
|
* - __u64
|
|
- ``flags``
|
|
- See :ref:`Frame Header Flags <vp8_frame_header_flags>`
|
|
|
|
.. _vp8_frame_header_flags:
|
|
|
|
``Frame Header Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_VP8_FRAME_HEADER_FLAG_KEY_FRAME``
|
|
- 0x01
|
|
- Indicates if the frame is a key frame.
|
|
* - ``V4L2_VP8_FRAME_HEADER_FLAG_EXPERIMENTAL``
|
|
- 0x02
|
|
- Experimental bitstream.
|
|
* - ``V4L2_VP8_FRAME_HEADER_FLAG_SHOW_FRAME``
|
|
- 0x04
|
|
- Show frame flag, indicates if the frame is for display.
|
|
* - ``V4L2_VP8_FRAME_HEADER_FLAG_MB_NO_SKIP_COEFF``
|
|
- 0x08
|
|
- Enable/disable skipping of macroblocks with no non-zero coefficients.
|
|
* - ``V4L2_VP8_FRAME_HEADER_FLAG_SIGN_BIAS_GOLDEN``
|
|
- 0x10
|
|
- Sign of motion vectors when the golden frame is referenced.
|
|
* - ``V4L2_VP8_FRAME_HEADER_FLAG_SIGN_BIAS_ALT``
|
|
- 0x20
|
|
- Sign of motion vectors when the alt frame is referenced.
|
|
|
|
.. c:type:: v4l2_vp8_entropy_coder_state
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
|
|
|
|
.. flat-table:: struct v4l2_vp8_entropy_coder_state
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u8
|
|
- ``range``
|
|
-
|
|
* - __u8
|
|
- ``value``
|
|
-
|
|
* - __u8
|
|
- ``bit_count``
|
|
-
|
|
* - __u8
|
|
- ``padding``
|
|
- Applications and drivers must set this to zero.
|
|
|
|
.. c:type:: v4l2_vp8_segment_header
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
|
|
|
|
.. flat-table:: struct v4l2_vp8_segment_header
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __s8
|
|
- ``quant_update[4]``
|
|
- Signed quantizer value update.
|
|
* - __s8
|
|
- ``lf_update[4]``
|
|
- Signed loop filter level value update.
|
|
* - __u8
|
|
- ``segment_probs[3]``
|
|
- Segment probabilities.
|
|
* - __u8
|
|
- ``padding``
|
|
- Applications and drivers must set this to zero.
|
|
* - __u32
|
|
- ``flags``
|
|
- See :ref:`Segment Header Flags <vp8_segment_header_flags>`
|
|
|
|
.. _vp8_segment_header_flags:
|
|
|
|
``Segment Header Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_VP8_SEGMENT_HEADER_FLAG_ENABLED``
|
|
- 0x01
|
|
- Enable/disable segment-based adjustments.
|
|
* - ``V4L2_VP8_SEGMENT_HEADER_FLAG_UPDATE_MAP``
|
|
- 0x02
|
|
- Indicates if the macroblock segmentation map is updated in this frame.
|
|
* - ``V4L2_VP8_SEGMENT_HEADER_FLAG_UPDATE_FEATURE_DATA``
|
|
- 0x04
|
|
- Indicates if the segment feature data is updated in this frame.
|
|
* - ``V4L2_VP8_SEGMENT_HEADER_FLAG_DELTA_VALUE_MODE``
|
|
- 0x08
|
|
- If is set, the segment feature data mode is delta-value.
|
|
If cleared, it's absolute-value.
|
|
|
|
.. c:type:: v4l2_vp8_loopfilter_header
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
|
|
|
|
.. flat-table:: struct v4l2_vp8_loopfilter_header
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __s8
|
|
- ``ref_frm_delta[4]``
|
|
- Reference adjustment (signed) delta value.
|
|
* - __s8
|
|
- ``mb_mode_delta[4]``
|
|
- Macroblock prediction mode adjustment (signed) delta value.
|
|
* - __u8
|
|
- ``sharpness_level``
|
|
- Sharpness level
|
|
* - __u8
|
|
- ``level``
|
|
- Filter level
|
|
* - __u16
|
|
- ``padding``
|
|
- Applications and drivers must set this to zero.
|
|
* - __u32
|
|
- ``flags``
|
|
- See :ref:`Loopfilter Header Flags <vp8_loopfilter_header_flags>`
|
|
|
|
.. _vp8_loopfilter_header_flags:
|
|
|
|
``Loopfilter Header Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_VP8_LF_HEADER_ADJ_ENABLE``
|
|
- 0x01
|
|
- Enable/disable macroblock-level loop filter adjustment.
|
|
* - ``V4L2_VP8_LF_HEADER_DELTA_UPDATE``
|
|
- 0x02
|
|
- Indicates if the delta values used in an adjustment are updated.
|
|
* - ``V4L2_VP8_LF_FILTER_TYPE_SIMPLE``
|
|
- 0x04
|
|
- If set, indicates the filter type is simple.
|
|
If cleared, the filter type is normal.
|
|
|
|
.. c:type:: v4l2_vp8_quantization_header
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
|
|
|
|
.. flat-table:: struct v4l2_vp8_quantization_header
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u8
|
|
- ``y_ac_qi``
|
|
- Luma AC coefficient table index.
|
|
* - __s8
|
|
- ``y_dc_delta``
|
|
- Luma DC delta vaue.
|
|
* - __s8
|
|
- ``y2_dc_delta``
|
|
- Y2 block DC delta value.
|
|
* - __s8
|
|
- ``y2_ac_delta``
|
|
- Y2 block AC delta value.
|
|
* - __s8
|
|
- ``uv_dc_delta``
|
|
- Chroma DC delta value.
|
|
* - __s8
|
|
- ``uv_ac_delta``
|
|
- Chroma AC delta value.
|
|
* - __u16
|
|
- ``padding``
|
|
- Applications and drivers must set this to zero.
|
|
|
|
.. c:type:: v4l2_vp8_entropy_header
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
|
|
|
|
.. flat-table:: struct v4l2_vp8_entropy_header
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u8
|
|
- ``coeff_probs[4][8][3][11]``
|
|
- Coefficient update probabilities.
|
|
* - __u8
|
|
- ``y_mode_probs[4]``
|
|
- Luma mode update probabilities.
|
|
* - __u8
|
|
- ``uv_mode_probs[3]``
|
|
- Chroma mode update probabilities.
|
|
* - __u8
|
|
- ``mv_probs[2][19]``
|
|
- MV decoding update probabilities.
|
|
* - __u8
|
|
- ``padding[3]``
|
|
- Applications and drivers must set this to zero.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
MFC 5.1 MPEG Controls
|
|
=====================
|
|
|
|
The following MPEG class controls deal with MPEG decoding and encoding
|
|
settings that are specific to the Multi Format Codec 5.1 device present
|
|
in the S5P family of SoCs by Samsung.
|
|
|
|
|
|
.. _mfc51-control-id:
|
|
|
|
MFC 5.1 Control IDs
|
|
-------------------
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE (boolean)``
|
|
If the display delay is enabled then the decoder is forced to return
|
|
a CAPTURE buffer (decoded frame) after processing a certain number
|
|
of OUTPUT buffers. The delay can be set through
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY``. This
|
|
feature can be used for example for generating thumbnails of videos.
|
|
Applicable to the H264 decoder.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY (integer)``
|
|
Display delay value for H264 decoder. The decoder is forced to
|
|
return a decoded frame after the set 'display delay' number of
|
|
frames. If this number is low it may result in frames returned out
|
|
of display order, in addition the hardware may still be using the
|
|
returned buffer as a reference picture for subsequent frames.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_H264_NUM_REF_PIC_FOR_P (integer)``
|
|
The number of reference pictures used for encoding a P picture.
|
|
Applicable to the H264 encoder.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_PADDING (boolean)``
|
|
Padding enable in the encoder - use a color instead of repeating
|
|
border pixels. Applicable to encoders.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_PADDING_YUV (integer)``
|
|
Padding color in the encoder. Applicable to encoders. The supplied
|
|
32-bit integer is interpreted as follows (bit 0 = least significant
|
|
bit):
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - Bit 0:7
|
|
- V chrominance information
|
|
* - Bit 8:15
|
|
- U chrominance information
|
|
* - Bit 16:23
|
|
- Y luminance information
|
|
* - Bit 24:31
|
|
- Must be zero.
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_RC_REACTION_COEFF (integer)``
|
|
Reaction coefficient for MFC rate control. Applicable to encoders.
|
|
|
|
.. note::
|
|
|
|
#. Valid only when the frame level RC is enabled.
|
|
|
|
#. For tight CBR, this field must be small (ex. 2 ~ 10). For
|
|
VBR, this field must be large (ex. 100 ~ 1000).
|
|
|
|
#. It is not recommended to use the greater number than
|
|
FRAME_RATE * (10^9 / BIT_RATE).
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_DARK (boolean)``
|
|
Adaptive rate control for dark region. Valid only when H.264 and
|
|
macroblock level RC is enabled
|
|
(``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_SMOOTH (boolean)``
|
|
Adaptive rate control for smooth region. Valid only when H.264 and
|
|
macroblock level RC is enabled
|
|
(``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_STATIC (boolean)``
|
|
Adaptive rate control for static region. Valid only when H.264 and
|
|
macroblock level RC is enabled
|
|
(``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_H264_ADAPTIVE_RC_ACTIVITY (boolean)``
|
|
Adaptive rate control for activity region. Valid only when H.264 and
|
|
macroblock level RC is enabled
|
|
(``V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE``). Applicable to the H264
|
|
encoder.
|
|
|
|
.. _v4l2-mpeg-mfc51-video-frame-skip-mode:
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_FRAME_SKIP_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_mfc51_video_frame_skip_mode -
|
|
Indicates in what conditions the encoder should skip frames. If
|
|
encoding a frame would cause the encoded stream to be larger then a
|
|
chosen data limit then the frame will be skipped. Possible values
|
|
are:
|
|
|
|
|
|
.. tabularcolumns:: |p{9.2cm}|p{8.3cm}|
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_MFC51_FRAME_SKIP_MODE_DISABLED``
|
|
- Frame skip mode is disabled.
|
|
* - ``V4L2_MPEG_MFC51_FRAME_SKIP_MODE_LEVEL_LIMIT``
|
|
- Frame skip mode enabled and buffer limit is set by the chosen
|
|
level and is defined by the standard.
|
|
* - ``V4L2_MPEG_MFC51_FRAME_SKIP_MODE_BUF_LIMIT``
|
|
- Frame skip mode enabled and buffer limit is set by the VBV
|
|
(MPEG1/2/4) or CPB (H264) buffer size control.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_RC_FIXED_TARGET_BIT (integer)``
|
|
Enable rate-control with fixed target bit. If this setting is
|
|
enabled, then the rate control logic of the encoder will calculate
|
|
the average bitrate for a GOP and keep it below or equal the set
|
|
bitrate target. Otherwise the rate control logic calculates the
|
|
overall average bitrate for the stream and keeps it below or equal
|
|
to the set bitrate. In the first case the average bitrate for the
|
|
whole stream will be smaller then the set bitrate. This is caused
|
|
because the average is calculated for smaller number of frames, on
|
|
the other hand enabling this setting will ensure that the stream
|
|
will meet tight bandwidth constraints. Applicable to encoders.
|
|
|
|
.. _v4l2-mpeg-mfc51-video-force-frame-type:
|
|
|
|
``V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_mfc51_video_force_frame_type -
|
|
Force a frame type for the next queued buffer. Applicable to
|
|
encoders. Possible values are:
|
|
|
|
.. tabularcolumns:: |p{9.5cm}|p{8.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_DISABLED``
|
|
- Forcing a specific frame type disabled.
|
|
* - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_I_FRAME``
|
|
- Force an I-frame.
|
|
* - ``V4L2_MPEG_MFC51_FORCE_FRAME_TYPE_NOT_CODED``
|
|
- 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
|
|
|
|
.. tabularcolumns:: |p{1.4cm}|p{4.3cm}|p{11.8cm}|
|
|
|
|
.. 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
|
|
============
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. tabularcolumns:: |p{6.8cm}|p{2.4cm}|p{8.3cm}|
|
|
|
|
.. 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
|
|
=====================
|
|
|
|
The following MPEG class controls deal with MPEG encoding settings that
|
|
are specific to the Conexant CX23415 and CX23416 MPEG encoding chips.
|
|
|
|
|
|
.. _cx2341x-control-id:
|
|
|
|
CX2341x Control IDs
|
|
-------------------
|
|
|
|
.. _v4l2-mpeg-cx2341x-video-spatial-filter-mode:
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_cx2341x_video_spatial_filter_mode -
|
|
Sets the Spatial Filter mode (default ``MANUAL``). Possible values
|
|
are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_MANUAL``
|
|
- Choose the filter manually
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_SPATIAL_FILTER_MODE_AUTO``
|
|
- Choose the filter automatically
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_SPATIAL_FILTER (integer (0-15))``
|
|
The setting for the Spatial Filter. 0 = off, 15 = maximum. (Default
|
|
is 0.)
|
|
|
|
.. _luma-spatial-filter-type:
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_cx2341x_video_luma_spatial_filter_type -
|
|
Select the algorithm to use for the Luma Spatial Filter (default
|
|
``1D_HOR``). Possible values:
|
|
|
|
.. tabularcolumns:: |p{14.5cm}|p{3.0cm}|
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_OFF``
|
|
- No filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_HOR``
|
|
- One-dimensional horizontal
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_VERT``
|
|
- One-dimensional vertical
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_HV_SEPARABLE``
|
|
- Two-dimensional separable
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_2D_SYM_NON_SEPARABLE``
|
|
- Two-dimensional symmetrical non-separable
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
|
|
.. _chroma-spatial-filter-type:
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_cx2341x_video_chroma_spatial_filter_type -
|
|
Select the algorithm for the Chroma Spatial Filter (default
|
|
``1D_HOR``). Possible values are:
|
|
|
|
|
|
.. tabularcolumns:: |p{14.0cm}|p{3.5cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_OFF``
|
|
- No filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_1D_HOR``
|
|
- One-dimensional horizontal
|
|
|
|
|
|
|
|
.. _v4l2-mpeg-cx2341x-video-temporal-filter-mode:
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_cx2341x_video_temporal_filter_mode -
|
|
Sets the Temporal Filter mode (default ``MANUAL``). Possible values
|
|
are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_MANUAL``
|
|
- Choose the filter manually
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_AUTO``
|
|
- Choose the filter automatically
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER (integer (0-31))``
|
|
The setting for the Temporal Filter. 0 = off, 31 = maximum. (Default
|
|
is 8 for full-scale capturing and 0 for scaled capturing.)
|
|
|
|
.. _v4l2-mpeg-cx2341x-video-median-filter-type:
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_cx2341x_video_median_filter_type -
|
|
Median Filter Type (default ``OFF``). Possible values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_OFF``
|
|
- No filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR``
|
|
- Horizontal filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_VERT``
|
|
- Vertical filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_HOR_VERT``
|
|
- Horizontal and vertical filter
|
|
* - ``V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_DIAG``
|
|
- Diagonal filter
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_BOTTOM (integer (0-255))``
|
|
Threshold above which the luminance median filter is enabled
|
|
(default 0)
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_LUMA_MEDIAN_FILTER_TOP (integer (0-255))``
|
|
Threshold below which the luminance median filter is enabled
|
|
(default 255)
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_BOTTOM (integer (0-255))``
|
|
Threshold above which the chroma median filter is enabled (default
|
|
0)
|
|
|
|
``V4L2_CID_MPEG_CX2341X_VIDEO_CHROMA_MEDIAN_FILTER_TOP (integer (0-255))``
|
|
Threshold below which the chroma median filter is enabled (default
|
|
255)
|
|
|
|
``V4L2_CID_MPEG_CX2341X_STREAM_INSERT_NAV_PACKETS (boolean)``
|
|
The CX2341X MPEG encoder can insert one empty MPEG-2 PES packet into
|
|
the stream between every four video frames. The packet size is 2048
|
|
bytes, including the packet_start_code_prefix and stream_id
|
|
fields. The stream_id is 0xBF (private stream 2). The payload
|
|
consists of 0x00 bytes, to be filled in by the application. 0 = do
|
|
not insert, 1 = insert packets.
|
|
|
|
|
|
VPX Control Reference
|
|
=====================
|
|
|
|
The VPX controls include controls for encoding parameters of VPx video
|
|
codec.
|
|
|
|
|
|
.. _vpx-control-id:
|
|
|
|
VPX Control IDs
|
|
---------------
|
|
|
|
.. _v4l2-vpx-num-partitions:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS``
|
|
(enum)
|
|
|
|
enum v4l2_vp8_num_partitions -
|
|
The number of token partitions to use in VP8 encoder. Possible
|
|
values are:
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_1_PARTITION``
|
|
- 1 coefficient partition
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_2_PARTITIONS``
|
|
- 2 coefficient partitions
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_4_PARTITIONS``
|
|
- 4 coefficient partitions
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_8_PARTITIONS``
|
|
- 8 coefficient partitions
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4 (boolean)``
|
|
Setting this prevents intra 4x4 mode in the intra mode decision.
|
|
|
|
.. _v4l2-vpx-num-ref-frames:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES``
|
|
(enum)
|
|
|
|
enum v4l2_vp8_num_ref_frames -
|
|
The number of reference pictures for encoding P frames. Possible
|
|
values are:
|
|
|
|
.. tabularcolumns:: |p{7.9cm}|p{9.6cm}|
|
|
|
|
.. raw:: latex
|
|
|
|
\small
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_1_REF_FRAME``
|
|
- Last encoded frame will be searched
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_2_REF_FRAME``
|
|
- Two frames will be searched among the last encoded frame, the
|
|
golden frame and the alternate reference (altref) frame. The
|
|
encoder implementation will decide which two are chosen.
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_3_REF_FRAME``
|
|
- The last encoded frame, the golden frame and the altref frame will
|
|
be searched.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL (integer)``
|
|
Indicates the loop filter level. The adjustment of the loop filter
|
|
level is done via a delta value against a baseline loop filter
|
|
value.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS (integer)``
|
|
This parameter affects the loop filter. Anything above zero weakens
|
|
the deblocking effect on the loop filter.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD (integer)``
|
|
Sets the refresh period for the golden frame. The period is defined
|
|
in number of frames. For a value of 'n', every nth frame starting
|
|
from the first key frame will be taken as a golden frame. For eg.
|
|
for encoding sequence of 0, 1, 2, 3, 4, 5, 6, 7 where the golden
|
|
frame refresh period is set as 4, the frames 0, 4, 8 etc will be
|
|
taken as the golden frames as frame 0 is always a key frame.
|
|
|
|
.. _v4l2-vpx-golden-frame-sel:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL``
|
|
(enum)
|
|
|
|
enum v4l2_vp8_golden_frame_sel -
|
|
Selects the golden frame for encoding. Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\scriptsize
|
|
|
|
.. tabularcolumns:: |p{9.0cm}|p{8.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_PREV``
|
|
- Use the (n-2)th frame as a golden frame, current frame index being
|
|
'n'.
|
|
* - ``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_USE_REF_PERIOD``
|
|
- Use the previous specific frame indicated by
|
|
``V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD`` as a
|
|
golden frame.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_MIN_QP (integer)``
|
|
Minimum quantization parameter for VP8.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_MAX_QP (integer)``
|
|
Maximum quantization parameter for VP8.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for VP8.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP (integer)``
|
|
Quantization parameter for a P frame for VP8.
|
|
|
|
.. _v4l2-mpeg-video-vp8-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VP8_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_vp8_profile -
|
|
This control allows selecting the profile for VP8 encoder.
|
|
This is also used to enumerate supported profiles by VP8 encoder or decoder.
|
|
Possible values are:
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_VP8_PROFILE_0``
|
|
- Profile 0
|
|
* - ``V4L2_MPEG_VIDEO_VP8_PROFILE_1``
|
|
- Profile 1
|
|
* - ``V4L2_MPEG_VIDEO_VP8_PROFILE_2``
|
|
- Profile 2
|
|
* - ``V4L2_MPEG_VIDEO_VP8_PROFILE_3``
|
|
- Profile 3
|
|
|
|
.. _v4l2-mpeg-video-vp9-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_VP9_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_vp9_profile -
|
|
This control allows selecting the profile for VP9 encoder.
|
|
This is also used to enumerate supported profiles by VP9 encoder or decoder.
|
|
Possible values are:
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_VP9_PROFILE_0``
|
|
- Profile 0
|
|
* - ``V4L2_MPEG_VIDEO_VP9_PROFILE_1``
|
|
- Profile 1
|
|
* - ``V4L2_MPEG_VIDEO_VP9_PROFILE_2``
|
|
- Profile 2
|
|
* - ``V4L2_MPEG_VIDEO_VP9_PROFILE_3``
|
|
- Profile 3
|
|
|
|
|
|
High Efficiency Video Coding (HEVC/H.265) Control Reference
|
|
===========================================================
|
|
|
|
The HEVC/H.265 controls include controls for encoding parameters of HEVC/H.265
|
|
video codec.
|
|
|
|
|
|
.. _hevc-control-id:
|
|
|
|
HEVC/H.265 Control IDs
|
|
----------------------
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP (integer)``
|
|
Minimum quantization parameter for HEVC.
|
|
Valid range: from 0 to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP (integer)``
|
|
Maximum quantization parameter for HEVC.
|
|
Valid range: from 0 to 51.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP (integer)``
|
|
Quantization parameter for an I frame for HEVC.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_P_FRAME_QP (integer)``
|
|
Quantization parameter for a P frame for HEVC.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_B_FRAME_QP (integer)``
|
|
Quantization parameter for a B frame for HEVC.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_QP (boolean)``
|
|
HIERARCHICAL_QP allows the host to specify the quantization parameter
|
|
values for each temporal layer through HIERARCHICAL_QP_LAYER. This is
|
|
valid only if HIERARCHICAL_CODING_LAYER is greater than 1. Setting the
|
|
control value to 1 enables setting of the QP values for the layers.
|
|
|
|
.. _v4l2-hevc-hier-coding-type:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_hier_coding_type -
|
|
Selects the hierarchical coding type for encoding. Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{9.0cm}|p{8.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_B``
|
|
- Use the B frame for hierarchical coding.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_HIERARCHICAL_CODING_P``
|
|
- Use the P frame for hierarchical coding.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_LAYER (integer)``
|
|
Selects the hierarchical coding layer. In normal encoding
|
|
(non-hierarchial coding), it should be zero. Possible values are [0, 6].
|
|
0 indicates HIERARCHICAL CODING LAYER 0, 1 indicates HIERARCHICAL CODING
|
|
LAYER 1 and so on.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 0.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 1.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 2.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 3.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 4.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 5.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_QP (integer)``
|
|
Indicates quantization parameter for hierarchical coding layer 6.
|
|
Valid range: [V4L2_CID_MPEG_VIDEO_HEVC_MIN_QP,
|
|
V4L2_CID_MPEG_VIDEO_HEVC_MAX_QP].
|
|
|
|
.. _v4l2-hevc-profile:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_PROFILE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_profile -
|
|
Select the desired profile for HEVC encoder.
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{9.0cm}|p{8.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN``
|
|
- Main profile.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_STILL_PICTURE``
|
|
- Main still picture profile.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_PROFILE_MAIN_10``
|
|
- Main 10 profile.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
.. _v4l2-hevc-level:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_LEVEL``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_level -
|
|
Selects the desired level for HEVC encoder.
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{9.0cm}|p{8.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_1``
|
|
- Level 1.0
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_2``
|
|
- Level 2.0
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_2_1``
|
|
- Level 2.1
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_3``
|
|
- Level 3.0
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_3_1``
|
|
- Level 3.1
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_4``
|
|
- Level 4.0
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1``
|
|
- Level 4.1
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5``
|
|
- Level 5.0
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1``
|
|
- Level 5.1
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_5_2``
|
|
- Level 5.2
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6``
|
|
- Level 6.0
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_1``
|
|
- Level 6.1
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LEVEL_6_2``
|
|
- Level 6.2
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_FRAME_RATE_RESOLUTION (integer)``
|
|
Indicates the number of evenly spaced subintervals, called ticks, within
|
|
one second. This is a 16 bit unsigned integer and has a maximum value up to
|
|
0xffff and a minimum value of 1.
|
|
|
|
.. _v4l2-hevc-tier:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_TIER``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_tier -
|
|
TIER_FLAG specifies tiers information of the HEVC encoded picture. Tier
|
|
were made to deal with applications that differ in terms of maximum bit
|
|
rate. Setting the flag to 0 selects HEVC tier as Main tier and setting
|
|
this flag to 1 indicates High tier. High tier is for applications requiring
|
|
high bit rates.
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{9.0cm}|p{8.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_TIER_MAIN``
|
|
- Main tier.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_TIER_HIGH``
|
|
- High tier.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_MAX_PARTITION_DEPTH (integer)``
|
|
Selects HEVC maximum coding unit depth.
|
|
|
|
.. _v4l2-hevc-loop-filter-mode:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_loop_filter_mode -
|
|
Loop filter mode for HEVC encoder. Possible values are:
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{12.1cm}|p{5.4cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED``
|
|
- Loop filter is disabled.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_ENABLED``
|
|
- Loop filter is enabled.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_LOOP_FILTER_MODE_DISABLED_AT_SLICE_BOUNDARY``
|
|
- Loop filter is disabled at the slice boundary.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_LF_BETA_OFFSET_DIV2 (integer)``
|
|
Selects HEVC loop filter beta offset. The valid range is [-6, +6].
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_LF_TC_OFFSET_DIV2 (integer)``
|
|
Selects HEVC loop filter tc offset. The valid range is [-6, +6].
|
|
|
|
.. _v4l2-hevc-refresh-type:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_TYPE``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_hier_refresh_type -
|
|
Selects refresh type for HEVC encoder.
|
|
Host has to specify the period into
|
|
V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD.
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{8.0cm}|p{9.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_NONE``
|
|
- Use the B frame for hierarchical coding.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_CRA``
|
|
- Use CRA (Clean Random Access Unit) picture encoding.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_REFRESH_IDR``
|
|
- Use IDR (Instantaneous Decoding Refresh) picture encoding.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_REFRESH_PERIOD (integer)``
|
|
Selects the refresh period for HEVC encoder.
|
|
This specifies the number of I pictures between two CRA/IDR pictures.
|
|
This is valid only if REFRESH_TYPE is not 0.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_LOSSLESS_CU (boolean)``
|
|
Indicates HEVC lossless encoding. Setting it to 0 disables lossless
|
|
encoding. Setting it to 1 enables lossless encoding.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_CONST_INTRA_PRED (boolean)``
|
|
Indicates constant intra prediction for HEVC encoder. Specifies the
|
|
constrained intra prediction in which intra largest coding unit (LCU)
|
|
prediction is performed by using residual data and decoded samples of
|
|
neighboring intra LCU only. Setting the value to 1 enables constant intra
|
|
prediction and setting the value to 0 disables constant intra prediction.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_WAVEFRONT (boolean)``
|
|
Indicates wavefront parallel processing for HEVC encoder. Setting it to 0
|
|
disables the feature and setting it to 1 enables the wavefront parallel
|
|
processing.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_GENERAL_PB (boolean)``
|
|
Setting the value to 1 enables combination of P and B frame for HEVC
|
|
encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_TEMPORAL_ID (boolean)``
|
|
Indicates temporal identifier for HEVC encoder which is enabled by
|
|
setting the value to 1.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_STRONG_SMOOTHING (boolean)``
|
|
Indicates bi-linear interpolation is conditionally used in the intra
|
|
prediction filtering process in the CVS when set to 1. Indicates bi-linear
|
|
interpolation is not used in the CVS when set to 0.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_MAX_NUM_MERGE_MV_MINUS1 (integer)``
|
|
Indicates maximum number of merge candidate motion vectors.
|
|
Values are from 0 to 4.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_TMV_PREDICTION (boolean)``
|
|
Indicates temporal motion vector prediction for HEVC encoder. Setting it to
|
|
1 enables the prediction. Setting it to 0 disables the prediction.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_WITHOUT_STARTCODE (boolean)``
|
|
Specifies if HEVC generates a stream with a size of the length field
|
|
instead of start code pattern. The size of the length field is configurable
|
|
through the V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD control. Setting
|
|
the value to 0 disables encoding without startcode pattern. Setting the
|
|
value to 1 will enables encoding without startcode pattern.
|
|
|
|
.. _v4l2-hevc-size-of-length-field:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_SIZE_OF_LENGTH_FIELD``
|
|
(enum)
|
|
|
|
enum v4l2_mpeg_video_hevc_size_of_length_field -
|
|
Indicates the size of length field.
|
|
This is valid when encoding WITHOUT_STARTCODE_ENABLE is enabled.
|
|
|
|
.. raw:: latex
|
|
|
|
\footnotesize
|
|
|
|
.. tabularcolumns:: |p{6.0cm}|p{11.0cm}|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_SIZE_0``
|
|
- Generate start code pattern (Normal).
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_SIZE_1``
|
|
- Generate size of length field instead of start code pattern and length is 1.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_SIZE_2``
|
|
- Generate size of length field instead of start code pattern and length is 2.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_SIZE_4``
|
|
- Generate size of length field instead of start code pattern and length is 4.
|
|
|
|
.. raw:: latex
|
|
|
|
\normalsize
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L0_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 0 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L1_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 1 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L2_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 2 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L3_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 3 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L4_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 4 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L5_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 5 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_HIER_CODING_L6_BR (integer)``
|
|
Indicates bit rate for hierarchical coding layer 6 for HEVC encoder.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES (integer)``
|
|
Selects number of P reference pictures required for HEVC encoder.
|
|
P-Frame can use 1 or 2 frames for reference.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR (integer)``
|
|
Indicates whether to generate SPS and PPS at every IDR. Setting it to 0
|
|
disables generating SPS and PPS at every IDR. Setting it to one enables
|
|
generating SPS and PPS at every IDR.
|
|
|
|
.. _v4l2-mpeg-hevc:
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_SPS (struct)``
|
|
Specifies the Sequence Parameter Set fields (as extracted from the
|
|
bitstream) for the associated HEVC slice data.
|
|
These bitstream parameters are defined according to :ref:`hevc`.
|
|
They are described in section 7.4.3.2 "Sequence parameter set RBSP
|
|
semantics" of the specification.
|
|
|
|
.. c:type:: v4l2_ctrl_hevc_sps
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_ctrl_hevc_sps
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u16
|
|
- ``pic_width_in_luma_samples``
|
|
-
|
|
* - __u16
|
|
- ``pic_height_in_luma_samples``
|
|
-
|
|
* - __u8
|
|
- ``bit_depth_luma_minus8``
|
|
-
|
|
* - __u8
|
|
- ``bit_depth_chroma_minus8``
|
|
-
|
|
* - __u8
|
|
- ``log2_max_pic_order_cnt_lsb_minus4``
|
|
-
|
|
* - __u8
|
|
- ``sps_max_dec_pic_buffering_minus1``
|
|
-
|
|
* - __u8
|
|
- ``sps_max_num_reorder_pics``
|
|
-
|
|
* - __u8
|
|
- ``sps_max_latency_increase_plus1``
|
|
-
|
|
* - __u8
|
|
- ``log2_min_luma_coding_block_size_minus3``
|
|
-
|
|
* - __u8
|
|
- ``log2_diff_max_min_luma_coding_block_size``
|
|
-
|
|
* - __u8
|
|
- ``log2_min_luma_transform_block_size_minus2``
|
|
-
|
|
* - __u8
|
|
- ``log2_diff_max_min_luma_transform_block_size``
|
|
-
|
|
* - __u8
|
|
- ``max_transform_hierarchy_depth_inter``
|
|
-
|
|
* - __u8
|
|
- ``max_transform_hierarchy_depth_intra``
|
|
-
|
|
* - __u8
|
|
- ``pcm_sample_bit_depth_luma_minus1``
|
|
-
|
|
* - __u8
|
|
- ``pcm_sample_bit_depth_chroma_minus1``
|
|
-
|
|
* - __u8
|
|
- ``log2_min_pcm_luma_coding_block_size_minus3``
|
|
-
|
|
* - __u8
|
|
- ``log2_diff_max_min_pcm_luma_coding_block_size``
|
|
-
|
|
* - __u8
|
|
- ``num_short_term_ref_pic_sets``
|
|
-
|
|
* - __u8
|
|
- ``num_long_term_ref_pics_sps``
|
|
-
|
|
* - __u8
|
|
- ``chroma_format_idc``
|
|
-
|
|
* - __u64
|
|
- ``flags``
|
|
- See :ref:`Sequence Parameter Set Flags <hevc_sps_flags>`
|
|
|
|
.. _hevc_sps_flags:
|
|
|
|
``Sequence Parameter Set Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_HEVC_SPS_FLAG_SEPARATE_COLOUR_PLANE``
|
|
- 0x00000001
|
|
-
|
|
* - ``V4L2_HEVC_SPS_FLAG_SCALING_LIST_ENABLED``
|
|
- 0x00000002
|
|
-
|
|
* - ``V4L2_HEVC_SPS_FLAG_AMP_ENABLED``
|
|
- 0x00000004
|
|
-
|
|
* - ``V4L2_HEVC_SPS_FLAG_SAMPLE_ADAPTIVE_OFFSET``
|
|
- 0x00000008
|
|
-
|
|
* - ``V4L2_HEVC_SPS_FLAG_PCM_ENABLED``
|
|
- 0x00000010
|
|
-
|
|
* - ``V4L2_HEVC_SPS_FLAG_PCM_LOOP_FILTER_DISABLED``
|
|
- 0x00000020
|
|
-
|
|
* - ``V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT``
|
|
- 0x00000040
|
|
-
|
|
* - ``V4L2_HEVC_SPS_FLAG_SPS_TEMPORAL_MVP_ENABLED``
|
|
- 0x00000080
|
|
-
|
|
* - ``V4L2_HEVC_SPS_FLAG_STRONG_INTRA_SMOOTHING_ENABLED``
|
|
- 0x00000100
|
|
-
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_PPS (struct)``
|
|
Specifies the Picture Parameter Set fields (as extracted from the
|
|
bitstream) for the associated HEVC slice data.
|
|
These bitstream parameters are defined according to :ref:`hevc`.
|
|
They are described in section 7.4.3.3 "Picture parameter set RBSP
|
|
semantics" of the specification.
|
|
|
|
.. c:type:: v4l2_ctrl_hevc_pps
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_ctrl_hevc_pps
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u8
|
|
- ``num_extra_slice_header_bits``
|
|
-
|
|
* - __s8
|
|
- ``init_qp_minus26``
|
|
-
|
|
* - __u8
|
|
- ``diff_cu_qp_delta_depth``
|
|
-
|
|
* - __s8
|
|
- ``pps_cb_qp_offset``
|
|
-
|
|
* - __s8
|
|
- ``pps_cr_qp_offset``
|
|
-
|
|
* - __u8
|
|
- ``num_tile_columns_minus1``
|
|
-
|
|
* - __u8
|
|
- ``num_tile_rows_minus1``
|
|
-
|
|
* - __u8
|
|
- ``column_width_minus1[20]``
|
|
-
|
|
* - __u8
|
|
- ``row_height_minus1[22]``
|
|
-
|
|
* - __s8
|
|
- ``pps_beta_offset_div2``
|
|
-
|
|
* - __s8
|
|
- ``pps_tc_offset_div2``
|
|
-
|
|
* - __u8
|
|
- ``log2_parallel_merge_level_minus2``
|
|
-
|
|
* - __u8
|
|
- ``padding[4]``
|
|
- Applications and drivers must set this to zero.
|
|
* - __u64
|
|
- ``flags``
|
|
- See :ref:`Picture Parameter Set Flags <hevc_pps_flags>`
|
|
|
|
.. _hevc_pps_flags:
|
|
|
|
``Picture Parameter Set Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_HEVC_PPS_FLAG_DEPENDENT_SLICE_SEGMENT``
|
|
- 0x00000001
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_OUTPUT_FLAG_PRESENT``
|
|
- 0x00000002
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_SIGN_DATA_HIDING_ENABLED``
|
|
- 0x00000004
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_CABAC_INIT_PRESENT``
|
|
- 0x00000008
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_CONSTRAINED_INTRA_PRED``
|
|
- 0x00000010
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_TRANSFORM_SKIP_ENABLED``
|
|
- 0x00000020
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED``
|
|
- 0x00000040
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_PPS_SLICE_CHROMA_QP_OFFSETS_PRESENT``
|
|
- 0x00000080
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_PRED``
|
|
- 0x00000100
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_BIPRED``
|
|
- 0x00000200
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_TRANSQUANT_BYPASS_ENABLED``
|
|
- 0x00000400
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_TILES_ENABLED``
|
|
- 0x00000800
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_ENTROPY_CODING_SYNC_ENABLED``
|
|
- 0x00001000
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED``
|
|
- 0x00002000
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED``
|
|
- 0x00004000
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_OVERRIDE_ENABLED``
|
|
- 0x00008000
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER``
|
|
- 0x00010000
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_LISTS_MODIFICATION_PRESENT``
|
|
- 0x00020000
|
|
-
|
|
* - ``V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT``
|
|
- 0x00040000
|
|
-
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS (struct)``
|
|
Specifies various slice-specific parameters, especially from the NAL unit
|
|
header, general slice segment header and weighted prediction parameter
|
|
parts of the bitstream.
|
|
These bitstream parameters are defined according to :ref:`hevc`.
|
|
They are described in section 7.4.7 "General slice segment header
|
|
semantics" of the specification.
|
|
|
|
.. c:type:: v4l2_ctrl_hevc_slice_params
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_ctrl_hevc_slice_params
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u32
|
|
- ``bit_size``
|
|
- Size (in bits) of the current slice data.
|
|
* - __u32
|
|
- ``data_bit_offset``
|
|
- Offset (in bits) to the video data in the current slice data.
|
|
* - __u8
|
|
- ``nal_unit_type``
|
|
-
|
|
* - __u8
|
|
- ``nuh_temporal_id_plus1``
|
|
-
|
|
* - __u8
|
|
- ``slice_type``
|
|
-
|
|
(V4L2_HEVC_SLICE_TYPE_I, V4L2_HEVC_SLICE_TYPE_P or
|
|
V4L2_HEVC_SLICE_TYPE_B).
|
|
* - __u8
|
|
- ``colour_plane_id``
|
|
-
|
|
* - __u16
|
|
- ``slice_pic_order_cnt``
|
|
-
|
|
* - __u8
|
|
- ``num_ref_idx_l0_active_minus1``
|
|
-
|
|
* - __u8
|
|
- ``num_ref_idx_l1_active_minus1``
|
|
-
|
|
* - __u8
|
|
- ``collocated_ref_idx``
|
|
-
|
|
* - __u8
|
|
- ``five_minus_max_num_merge_cand``
|
|
-
|
|
* - __s8
|
|
- ``slice_qp_delta``
|
|
-
|
|
* - __s8
|
|
- ``slice_cb_qp_offset``
|
|
-
|
|
* - __s8
|
|
- ``slice_cr_qp_offset``
|
|
-
|
|
* - __s8
|
|
- ``slice_act_y_qp_offset``
|
|
-
|
|
* - __s8
|
|
- ``slice_act_cb_qp_offset``
|
|
-
|
|
* - __s8
|
|
- ``slice_act_cr_qp_offset``
|
|
-
|
|
* - __s8
|
|
- ``slice_beta_offset_div2``
|
|
-
|
|
* - __s8
|
|
- ``slice_tc_offset_div2``
|
|
-
|
|
* - __u8
|
|
- ``pic_struct``
|
|
-
|
|
* - __u8
|
|
- ``num_active_dpb_entries``
|
|
- The number of entries in ``dpb``.
|
|
* - __u8
|
|
- ``ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
|
|
- The list of L0 reference elements as indices in the DPB.
|
|
* - __u8
|
|
- ``ref_idx_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
|
|
- The list of L1 reference elements as indices in the DPB.
|
|
* - __u8
|
|
- ``num_rps_poc_st_curr_before``
|
|
- The number of reference pictures in the short-term set that come before
|
|
the current frame.
|
|
* - __u8
|
|
- ``num_rps_poc_st_curr_after``
|
|
- The number of reference pictures in the short-term set that come after
|
|
the current frame.
|
|
* - __u8
|
|
- ``num_rps_poc_lt_curr``
|
|
- The number of reference pictures in the long-term set.
|
|
* - __u8
|
|
- ``padding[7]``
|
|
- Applications and drivers must set this to zero.
|
|
* - struct :c:type:`v4l2_hevc_dpb_entry`
|
|
- ``dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
|
|
- The decoded picture buffer, for meta-data about reference frames.
|
|
* - struct :c:type:`v4l2_hevc_pred_weight_table`
|
|
- ``pred_weight_table``
|
|
- The prediction weight coefficients for inter-picture prediction.
|
|
* - __u64
|
|
- ``flags``
|
|
- See :ref:`Slice Parameters Flags <hevc_slice_params_flags>`
|
|
|
|
.. _hevc_slice_params_flags:
|
|
|
|
``Slice Parameters Flags``
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_LUMA``
|
|
- 0x00000001
|
|
-
|
|
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_CHROMA``
|
|
- 0x00000002
|
|
-
|
|
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_TEMPORAL_MVP_ENABLED``
|
|
- 0x00000004
|
|
-
|
|
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_MVD_L1_ZERO``
|
|
- 0x00000008
|
|
-
|
|
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_CABAC_INIT``
|
|
- 0x00000010
|
|
-
|
|
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_COLLOCATED_FROM_L0``
|
|
- 0x00000020
|
|
-
|
|
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_USE_INTEGER_MV``
|
|
- 0x00000040
|
|
-
|
|
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_DEBLOCKING_FILTER_DISABLED``
|
|
- 0x00000080
|
|
-
|
|
* - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED``
|
|
- 0x00000100
|
|
-
|
|
|
|
.. c:type:: v4l2_hevc_dpb_entry
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_hevc_dpb_entry
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u64
|
|
- ``timestamp``
|
|
- Timestamp of the V4L2 capture buffer to use as reference, used
|
|
with B-coded and 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.
|
|
* - __u8
|
|
- ``rps``
|
|
- The reference set for the reference frame
|
|
(V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_BEFORE,
|
|
V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_AFTER or
|
|
V4L2_HEVC_DPB_ENTRY_RPS_LT_CURR)
|
|
* - __u8
|
|
- ``field_pic``
|
|
- Whether the reference is a field picture or a frame.
|
|
* - __u16
|
|
- ``pic_order_cnt[2]``
|
|
- The picture order count of the reference. Only the first element of the
|
|
array is used for frame pictures, while the first element identifies the
|
|
top field and the second the bottom field in field-coded pictures.
|
|
* - __u8
|
|
- ``padding[2]``
|
|
- Applications and drivers must set this to zero.
|
|
|
|
.. c:type:: v4l2_hevc_pred_weight_table
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table:: struct v4l2_hevc_pred_weight_table
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - __u8
|
|
- ``luma_log2_weight_denom``
|
|
-
|
|
* - __s8
|
|
- ``delta_chroma_log2_weight_denom``
|
|
-
|
|
* - __s8
|
|
- ``delta_luma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
|
|
-
|
|
* - __s8
|
|
- ``luma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
|
|
-
|
|
* - __s8
|
|
- ``delta_chroma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
|
|
-
|
|
* - __s8
|
|
- ``chroma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
|
|
-
|
|
* - __s8
|
|
- ``delta_luma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
|
|
-
|
|
* - __s8
|
|
- ``luma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
|
|
-
|
|
* - __s8
|
|
- ``delta_chroma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
|
|
-
|
|
* - __s8
|
|
- ``chroma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]``
|
|
-
|
|
* - __u8
|
|
- ``padding[6]``
|
|
- Applications and drivers must set this to zero.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE (enum)``
|
|
Specifies the decoding mode to use. Currently exposes slice-based and
|
|
frame-based decoding but new modes might be added later on.
|
|
This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE
|
|
pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE
|
|
are required to set this control in order to specify the decoding mode
|
|
that is expected for the buffer.
|
|
Drivers may expose a single or multiple decoding modes, depending
|
|
on what they can support.
|
|
|
|
.. note::
|
|
|
|
This menu control is not yet part of the public kernel API and
|
|
it is expected to change.
|
|
|
|
.. c:type:: v4l2_mpeg_video_hevc_decode_mode
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_SLICE_BASED``
|
|
- 0
|
|
- Decoding is done at the slice granularity.
|
|
The OUTPUT buffer must contain a single slice.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_FRAME_BASED``
|
|
- 1
|
|
- Decoding is done at the frame granularity.
|
|
The OUTPUT buffer must contain all slices needed to decode the
|
|
frame. The OUTPUT buffer must also contain both fields.
|
|
|
|
``V4L2_CID_MPEG_VIDEO_HEVC_START_CODE (enum)``
|
|
Specifies the HEVC slice start code expected for each slice.
|
|
This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE
|
|
pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE
|
|
are required to set this control in order to specify the start code
|
|
that is expected for the buffer.
|
|
Drivers may expose a single or multiple start codes, depending
|
|
on what they can support.
|
|
|
|
.. note::
|
|
|
|
This menu control is not yet part of the public kernel API and
|
|
it is expected to change.
|
|
|
|
.. c:type:: v4l2_mpeg_video_hevc_start_code
|
|
|
|
.. cssclass:: longtable
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
:widths: 1 1 2
|
|
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_START_CODE_NONE``
|
|
- 0
|
|
- Selecting this value specifies that HEVC slices are passed
|
|
to the driver without any start code.
|
|
* - ``V4L2_MPEG_VIDEO_HEVC_START_CODE_ANNEX_B``
|
|
- 1
|
|
- Selecting this value specifies that HEVC slices are expected
|
|
to be prefixed by Annex B start codes. According to :ref:`hevc`
|
|
valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001.
|