Documentation: Fix typos

Fix typos in Documentation.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230814212822.193684-4-helgaas@kernel.org
Signed-off-by: Jon

Documentation: Fix typos

Fix typos in Documentation.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20230814212822.193684-4-helgaas@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

show more ...

media: Add AV1 uAPI

This patch adds the AOMedia Video 1 (AV1) kernel uAPI.

This design is based on currently available AV1 API implementations and
aims to support the development of AV1 stateless

media: Add AV1 uAPI

This patch adds the AOMedia Video 1 (AV1) kernel uAPI.

This design is based on currently available AV1 API implementations and
aims to support the development of AV1 stateless video codecs
on Linux.

Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com>
Co-developed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

show more ...

media: uapi: HEVC: Add num_delta_pocs_of_ref_rps_idx field

Some drivers firmwares parse by themselves slice header and need
num_delta_pocs_of_ref_rps_idx value to parse slice header
short_term_ref_p

media: uapi: HEVC: Add num_delta_pocs_of_ref_rps_idx field

Some drivers firmwares parse by themselves slice header and need
num_delta_pocs_of_ref_rps_idx value to parse slice header
short_term_ref_pic_set().
Use one of the 4 reserved bytes to store this value without
changing the v4l2_ctrl_hevc_decode_params structure size and padding.

This value also exist in DXVA API.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil: fix typo in num_delta_pocs_of_ref_rps_idx doc]

show more ...

Documentation: userspace-api: correct spelling

Correct spelling problems for Documentation/userspace-api/ as reported
by codespell.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jonathan

Documentation: userspace-api: correct spelling

Correct spelling problems for Documentation/userspace-api/ as reported
by codespell.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: Sean Young <sean@mess.org>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linux-media@vger.kernel.org
Link: https://lore.kernel.org/r/20230129231053.20863-10-rdunlap@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

show more ...

media: uapi: move HEVC stateless controls out of staging

HEVC uAPI is used by 2 mainline drivers (Hantro, Cedrus)
and at least 2 out-of-tree drivers (rkvdec, RPi).
The uAPI has been reviewed so it i

media: uapi: move HEVC stateless controls out of staging

HEVC uAPI is used by 2 mainline drivers (Hantro, Cedrus)
and at least 2 out-of-tree drivers (rkvdec, RPi).
The uAPI has been reviewed so it is time to make it 'public' by
un-staging it.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Acked-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Tested-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

show more ...

media: doc: Document dual use of H.264 pic_num/frame_num

These two fields need documentation as they have dual meaning. It is also
confusing since pic_num is a derived value from frame_num, so this

media: doc: Document dual use of H.264 pic_num/frame_num

These two fields need documentation as they have dual meaning. It is also
confusing since pic_num is a derived value from frame_num, so this should
help application developers. If we ever need to make a V2 of this API, I
would suggest to remove pic_num entirely.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Sebastian Fricke <sebastian.fricke@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

show more ...

media: v4l2-ctrls: Add new V4L2_H264_DECODE_PARAM_FLAG_P/BFRAME flags

Add new V4L2_H264_DECODE_PARAM_FLAG_P/BFRAME flags that are needed by
NVIDIA Tegra video decoder. Userspace will have to set the

media: v4l2-ctrls: Add new V4L2_H264_DECODE_PARAM_FLAG_P/BFRAME flags

Add new V4L2_H264_DECODE_PARAM_FLAG_P/BFRAME flags that are needed by
NVIDIA Tegra video decoder. Userspace will have to set these flags in
accordance to the type of a decoded frame.

Reviewed-by: Nicolas Dufresne <nicolas@collabora.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

show more ...

doc: media: Document VP9 reference_mode miss-placement

The reference_mode derived syntax is part of the compressed headers and
should have been moved into the corresponding control structure. Docume

doc: media: Document VP9 reference_mode miss-placement

The reference_mode derived syntax is part of the compressed headers and
should have been moved into the corresponding control structure. Document
this mistake. The value can be set to 0 if the driver does not require
compressed headers information.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil: fix small typo in comment]

show more ...

media: uapi: Add VP9 stateless decoder controls

Add the VP9 stateless decoder controls plus the documentation that goes
with it.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Co-de

media: uapi: Add VP9 stateless decoder controls

Add the VP9 stateless decoder controls plus the documentation that goes
with it.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Co-developed-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Co-developed-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

show more ...

media: v4l2-ctrls: split up into four source files

The v4l2-ctrls.c source has become much too big, so split it up
into four separate parts:

v4l2-ctrls-core.c: contains the core framework code
v4l2

media: v4l2-ctrls: split up into four source files

The v4l2-ctrls.c source has become much too big, so split it up
into four separate parts:

v4l2-ctrls-core.c: contains the core framework code
v4l2-ctrls-api.c: contains the uAPI interface to the framework
v4l2-ctrls-defs.c: contains the control definitions
v4l2-ctrls-request.c: contains the Request API helpers

And it adds a new v4l2-ctrls-priv.h.

No code was changed, but a number of checkpatch.pl warnings were
fixed (alignment, f == NULL -> !f, long comment block coding style,
unsigned -> unsigned int).

The copyright statements were updated as well since they were
quite out of date.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

show more ...

media: uapi: move MPEG-2 stateless controls out of staging

Until now, the MPEG-2 V4L2 API was not exported as a public API,
and only defined in a private media header (media/mpeg2-ctrls.h).

After r

media: uapi: move MPEG-2 stateless controls out of staging

Until now, the MPEG-2 V4L2 API was not exported as a public API,
and only defined in a private media header (media/mpeg2-ctrls.h).

After reviewing the MPEG-2 specification in detail, and reworking
the controls so they match the MPEG-2 semantics properly,
we can consider it ready.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Tested-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Tested-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

show more ...

media: uapi: move VP8 stateless controls out of staging

Until now, the VP8 V4L2 API was not exported as a public API,
and only defined in a private media header (media/vp8-ctrls.h).

The reason for

media: uapi: move VP8 stateless controls out of staging

Until now, the VP8 V4L2 API was not exported as a public API,
and only defined in a private media header (media/vp8-ctrls.h).

The reason for this was a concern about the API not complete
and ready to support VP8 decoding hardware accelerators.

After reviewing the VP8 specification in detail, and now
that the API is able to support Cedrus and Hantro G1,
we can consider this ready.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

show more ...

media: doc: h264/hevc: Clarify _START_CODE_NONE meaning

As some hardware have a knob to enable or disable emulation prevention
bytes removal, driver writers ended up wondering what exactly the
START

media: doc: h264/hevc: Clarify _START_CODE_NONE meaning

As some hardware have a knob to enable or disable emulation prevention
bytes removal, driver writers ended up wondering what exactly the
START_CODE_NONE modes meant in this regards. This patch clarify what is
expected with a reference to the specification.

Reported-by: John Cox <jc@kynesim.co.uk>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

show more ...

media: docs: uAPI: fix table output in LaTeX/PDF format

There are lots of tables that are not properly displayed
in LaTeX/PDF.

Fix the tablecolumns, add longtable where needed and LaTeX
formatting

media: docs: uAPI: fix table output in LaTeX/PDF format

There are lots of tables that are not properly displayed
in LaTeX/PDF.

Fix the tablecolumns, add longtable where needed and LaTeX
formatting macros, in order to address such issues.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

show more ...

media: ext-ctrls-codec-stateless.rst: fix an H-264 table format

The Picture Parameter Set Flags table for H-264 doesn't output
well on PDF. There are missing format instructions for LaTeX, and
the c

media: ext-ctrls-codec-stateless.rst: fix an H-264 table format

The Picture Parameter Set Flags table for H-264 doesn't output
well on PDF. There are missing format instructions for LaTeX, and
the columns are too long.

Reduce the size of the second column, as 16 bits is more than enough
for the current flags usage, and add the needed bits for it to be
properly output in PDF format.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

show more ...

media: ext-ctrls-codec-stateless.rst: change a FWHT flag description

Instead of using "- 1", use "minus one".

The reason is that, if the table is split like:

V4L2_FWHT_FL_COMPONENTS_NUM_MSK 0x0

media: ext-ctrls-codec-stateless.rst: change a FWHT flag description

Instead of using "- 1", use "minus one".

The reason is that, if the table is split like:

V4L2_FWHT_FL_COMPONENTS_NUM_MSK 0x00070000 The number of color components
- 1.

One might not realize the meaning of the second line.

As a side effect, using text instead of arabic numbers is
more appropriate for formal documents like this spec.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

show more ...

media: ext-ctrls-codec.rst: move FWHT docs to ext-ctrls-codec-stateless.rst

Move the documentation for the stateless FWHT codec to
ext-ctrls-codec-stateless.rst since that is the proper place
for th

media: ext-ctrls-codec.rst: move FWHT docs to ext-ctrls-codec-stateless.rst

Move the documentation for the stateless FWHT codec to
ext-ctrls-codec-stateless.rst since that is the proper place
for the stable stateless API documentation.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

show more ...

media: docs: Move the H264 stateless codec uAPI

Now that we've destaged the H264 stateless codec controls,
and with all the pieces in place, update the documentation
and move it to its own section.

media: docs: Move the H264 stateless codec uAPI

Now that we've destaged the H264 stateless codec controls,
and with all the pieces in place, update the documentation
and move it to its own section.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

show more ...