uvc-gadget.git, branch v0.1.0

uvc-gadget v0.1.0

2022-11-25T16:50:32+00:00

This release culminates being able to integrate many historical changes
and updates that we had pending for quite some time along with some
bugfixes and clean ups.

Key new features already added to this release include:

- SuperSpeed descriptor support
- MJPEG support fixes
- Update to support new gadget locations
- Conversion to Meson build infrastructure
- A new test pattern source generator
- Support for JPEG sources
- Improved logging
- Commencement of control support

Signed-off-by: Kieran Bingham

scripts: Provide a release script

2022-11-25T16:29:24+00:00

Support making releases of uvc-gadget by introducing a helper script
which will facilitate the increment of any release version, along with
generating an associated tag, derived from the equivalent implementation
in libcamera [0].

[0] https://git.libcamera.org/libcamera/libcamera.git/tree/utils/release.sh?h=v0.0.2

Reviewed-by: Daniel Scally 
Signed-off-by: Kieran Bingham

scripts: semver: Add version helper

2022-11-25T13:52:26+00:00

Provide the semver utility (version 3.4.0) from [0] to make use of it
with our versioning and release scripts.

[0] https://raw.githubusercontent.com/fsaintjacques/semver-tool/3c76a6f9d113f4045f693845131185611a62162e/src/semver

Signed-off-by: Kieran Bingham

lib: uvc: Respond to control requests with dummy values

2022-11-22T16:08:30+00:00

Without a response, the host will assume there has been an error and
throw a bunch of errors. The noise of those errors makes it difficult
to see what's going on properly, so return a dummy response that
silences the errors until the functionality is properly implemented.

Reviewed-by: Kieran Bingham 
Signed-off-by: Daniel Scally 
Signed-off-by: Kieran Bingham

lib: uvc: Add control names in output prints

2022-11-22T16:08:30+00:00

It's easier to see what's going on at a glance when the output is
human-readable, so replace the control codes with their names.

Reviewed-by: Kieran Bingham 
Signed-off-by: Daniel Scally 
Signed-off-by: Kieran Bingham

lib: uvc: Drop maxsize

2022-11-22T16:08:24+00:00

The maxsize field of struct uvc_device is probably unecessary even if
it weren't currently fixed at 0. It's used to set dwMaxVideoFrameSize
in addition to the sizeimage member of a struct v4l2_pix_fmt (multiplied
in the latter instance by 1.5x). The documentary definitions for those
two values are such that they should be identical though, so simply
set dwMaxVideoFrameSize to width*height*2 (to maintain commonality
with other UVC Video devices) and use that to set the sizeimage.

Reviewed-by: Kieran Bingham 
Signed-off-by: Daniel Scally 
Signed-off-by: Kieran Bingham

lib: events: Use list_for_each_entry() instead of the _safe() version

2022-11-22T16:07:58+00:00

For the UVC_EVENT_STREAMOFF event, the callback frees _other_ events
because it's closing down the pipe. The use of the _safe() version
of the list iterator results in a use-after-free of those events
because they're fetched before the callback that frees them. The
_safe() version is unecessary here; no other callback's behaviour
requires it.

Reviewed-by: Kieran Bingham 
Signed-off-by: Daniel Scally 
Signed-off-by: Kieran Bingham

main: add support for jpg_source

2022-11-22T16:05:29+00:00

Add facilities in main() to allow selection and usage of jpg_source.

Reviewed-by: Kieran Bingham 
Reviewed-by: Daniel Scally 
Signed-off-by: Paul Elder 
Signed-off-by: Kieran Bingham

jpg-source: add jpg source class

2022-11-22T16:05:21+00:00

The jpg_source class is an implementation of the video_source class that
streams a still jpg image as video.

Reviewed-by: Kieran Bingham 
Signed-off-by: Paul Elder 
Signed-off-by: Daniel Scally 
Signed-off-by: Kieran Bingham

main: add default option to use test-source

2022-11-22T16:02:25+00:00

Now that we have test-source which provides video by generating a test
pattern in userspace, allow its selection in the command line options.
Since it isn't backed by anything, it is set as the default video source
if nothing else is specified.

Reviewed-by: Daniel Scally 
Reviewed-by: Kieran Bingham 
Signed-off-by: Paul Elder 
Signed-off-by: Kieran Bingham