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Some applications (like Firefox) run open() many times on video device
nodes. This may lead to user confusion when they see "INFO V4L2Compat
v4l2_compat_manager.cpp:146 No camera found for /dev/videoX" over and
over again.
Lower the log level to debug so that we can still get this information
on debug, and so users won't see it all the time.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The V4L2 compatibility layer supports the single-planar API only, and
thus exposes a single V4L2 buffer plane to applications, regardless of
the number of planes in the FrameBuffer. For multi-planar frame buffers,
the bytesused value isn't correct as it only takes the first plane into
account. Fix it by summing the bytesused values for all FrameBuffer
planes.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
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The number of metadata planes should always match the number of frame
buffer planes. Enforce this by making the vector private and providing
accessor functions.
As this changes the public API, update all in-tree users accordingly.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
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Replace manual searches for V4L2 pixel format in the PixelFormatInfo
with the V4L2PixelFormat::fromPixelFormat() helper function. This
prepares for multi-planar support that will modify how V4L2 pixel
formats are stored in PixelFormatInfo.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Replace the open-coded PixelFormat lookup with the
V4L2PixelFormat::toPixelFormat() helper function. This simplifies the
implementation.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasoboard.com>
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Remove leftover inclusions of the sys/mman header file.
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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libcamera names header files based on the classes they define. The
buffer.h file is an exception. Rename it to framebuffer.h.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Headers which must not be exposed as part of the public libcamera API
should include base/private.h.
Any interface which includes the private.h header will only be able to
build if the libcamera_private dependency is used (or the
libcamera_base_private dependency directly).
Build targets which are intended to use the private API's will use the
libcamera_private to handle the automatic definition of the inclusion
guard.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Move the functionality for the following components to the new
base support library:
- BoundMethod
- EventDispatcher
- EventDispatcherPoll
- Log
- Message
- Object
- Signal
- Semaphore
- Thread
- Timer
While it would be preferable to see these split to move one component
per commit, these components are all interdependent upon each other,
which leaves us with one big change performing the move for all of them.
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Move the utils functionality to the libcamera/base library.
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Use the newly introduced utils::enumerate() to replace manual loop
counters. A local variable is needed, as utils::enumerate() requires an
lvalue reference.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add the application and adaptation layers being built to the meson
summary. The summary now prints
libcamera 0.0.0
Configuration
Enabled pipelines: ipu3
raspberrypi
rkisp1
simple
uvcvideo
vimc
Android support: True
GStreamer support: True
V4L2 emulation support: True
cam application: True
qcam application: True
Unit tests: True
Subprojects
libyuv: YES
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Hirokazu Honda <hiroh@chromium.org>
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The meson.build files mix array declarations with and without a space
after the opening and before the closing square bracket. The vast
majority of cases don't use spaces, so standardize on that.
While it it, fix indentation in a few places.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Simplify the src level meson file by moving the declaration of the v4l2
subdir to match the other invocations, making use of 'subdir_done()' to
break out if the adaptation layer is not enabled.
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Rename the internal member variables to use the post-fixed '_' member
variable naming style. This in turn ensures variable shadowing does not
occur in the member initializer list of the constructor.
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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LOG_DECLARE_CATEGORY macro contains the semicolon. The end
semicolon with the macro is unnecessary.
Signed-off-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Allow reuse of the Request object by implementing reuse(). This means
the applications now have the responsibility of freeing the Request
objects, so make all libcamera users (cam, qcam, v4l2-compat, gstreamer,
android) do so.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
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The V4L2CameraProxy always calls V4L2Camera::getStreamConfig() right
after V4L2Camera::open(), and never afterwards. Simplify the code by
returning the initial configuration from V4L2Camera::open() and removing
V4L2Camera::getStreamConfig().
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The V4L2 compatibility layer only uses the fmt.pix field of
curV4L2Format_. There's no need to cache the full v4l2_format, store
v4l2_pix_format only and rename the member variable from curV4L2Format_
to v4l2PixFormat_. While at it, group the V4L2-related member variables
together in the V4L2CameraProxy class.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The setFmtFromConfig() method doesn't modify its parameter, make it
const.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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We build libcamera with -Wno-unused-parameter and this doesn't cause
much issue internally. However, it prevents catching unused parameters
in inline functions defined in public headers. This can lead to
compilation warnings for applications compiled without
-Wno-unused-parameter.
To catch those issues, remove -Wno-unused-parameter and fix all the
related warnings with [[maybe_unused]].
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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Rename Camera::name() to camera::id() to better describe what it
represents, a unique and stable ID for the camera. While at it improve
the documentation for the camera ID to describe it needs to be stable
for a camera between resets of the system.
Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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For handling try_fmt, the values should be filled in by validating the
stream configuration, and not by recalculating them or manually checking
against the cached list of formats and sizes. Add a new
V4L2Camera::validateConfiguration() function to validate a configuration
and use it to obtain size, format, stride, and frameSize values.
If the format negotiation fails, return error from try_fmt and s_fmt.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The stride and frameSize should be obtained through StreamConfiguration
rather than PixelFormatInfo, as pipeline handlers might have different
values (eg. for alignment). Get the stride and frameSize values from
StreamConfiguration instead of from PixelFormatInfo.
This removes the need for V4L2CameraProxy's calculation helper functions
(bplMultiplier, imageSize, v4l2ToDrm, drmToV4L2, calculateSizeImage) and
formats, so remove them.
This also removes the need for V4L2CameraProxy::calculateSizeImage, so
remove it,.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The buffer operations in V4L2Camera were getting the stream from the
wrong place. Fix it.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
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Make the V4L2 compatibility layer thread-safe by serializing accesses to
the V4L2CameraProxy with a lock. Release the lock when blocking for
dqbuf.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Fix buffer flags related to queueing and dequeueing:
- don't allow a buffer with the same index that is already in the queue
to be enqueued again
- don't clear the done flag upon qbuf
- do clear the done flag upon dqbuf
- set the flags in V4L2CameraProxy's internal buffers, and not just in
the buffers returned from qbuf
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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In VIDIOC_REQBUFS with count = 0, if the buffers are still mmaped, they
should not be allowed to be freed. Add a check for this.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Make VIDIOC_STREAMON return -EINVAL if no buffers have been allocated
with reqbufs.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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There were no bounds checks for the index argument for VIDIOC_QUERYBUF,
VIDIOC_QBUF, and VIDIOC_DQBUF. Add them.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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V4L2 allows buffer queueing before streamon while libcamera does not.
The compatibility layer thus saves these buffers in a pending queue
until streamon, and then automatically queues them. However, this
pending queue is not cleared when the buffers are freed, so the
following sequence of actions will cause a use-after-free:
1. queue buffers
2. free buffers
- buffers from 1. stay in pending queue but have been freed
3. queue buffers
4. streamon
- buffers from 1. are enqueued, then the buffers from 3. are
enqueued. Use-after-free segfault when libcamera tries to handle
the enqueued buffers from 1.
Fix this by clearing the pending request queue upon buffers being freed.
Also clear the pending request queue on streamOff, for correctness.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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In V4L2, a blocked dqbuf should not not also block a streamoff. This
means that on streamoff, the blocked dqbuf must return (with error). We
cannot do this with the libcamera semaphore, so pull out the necessary
components of a semaphore, and put them into V4L2Camera, so that dqbuf
from V4L2CameraProxy can wait on a disjunct condition of the
availability of the semaphore or the stopping of the stream.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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If VIDIOC_REQBUFS with count = 0 is called when the stream is not on,
clear the proxy's internal vector of buffer. If the stream is on when
reqbufs 0 is called, return -EBUSY.
Note that this is contrary to what the V4L2 docs say (reqbufs 0 when
streaming should also streamoff), but it is how the V4L2 implementation
works. v4l2-compliance doesn't seem to care either way, however, so we
cater to the implementation, and no longer call streamoff on reqbufs 0.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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If VIDIOC_STREMAON is called when the stream is already on, do a noop.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Make VIDIOC_DQBUF return -EINVAL if the stream is not turned on.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add a method isRunning() to V4L2Camera so that V4L2CameraProxy can use
it for checks.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Implement VIDIOC_ENUM_FRAMESIZES in the V4L2 compatibility layer.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Implement VIDIOC_ENUMINPUT, VIDIOC_G_INPUT, and VIDIOC_S_INPUT. Only the
zeroth input device is supported, and the info returned by enuminput is
hardcoded and basic. This is sufficient to pass v4l2-compliance.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Implement VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY. The behaviour
documented in the V4L2 specification doesn't match the implementation in
the Linux kernel, implement the latter.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Fix the following v4l2-compliance error:
fail: v4l2-compliance.cpp(652): !(caps & V4L2_CAP_EXT_PIX_FORMAT)
Simply add V4L2_CAP_EXT_PIX_FORMAT to capabilities in querycap.
In addition, populate the necessary fields in struct v4l2_pix_format to
support extended pixel formats in try_fmt and g/s_fmt, and clear the
reserved field for enum_fmt.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Acked-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The ioctl handlers currently don't check if arg is null, so if it ever
is, it will cause a segfault. Check that arg is null and return -EFAULT
in the main vidioc ioctl handler.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Set buffer flag V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC at VIDIOC_REQBUFS
after the buffers have been allocated.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Clear the reserved field in arg struct v4l2_reqbuffers of
VIDIOC_REQBUFS.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Free buffers, if any were previously allocated, at VIDIOC_REQBUFS with
count > 0.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Previously, since we acquired the libcamera camera upon open(), it was
impossible to support multiple open, as any subsequent opens would
return error because the camera would already be acquired.
To fix this, we first initialize the camera in the first call to
V4L2CameraProxy::open(), just to heat up the stream format cache. We
then add ownership by a V4L2CameraFile of a V4L2Camera via the
V4L2CameraProxy. All vidioc ioctls prior to reqbufs > 0 (except for
s_fmt) are able to access the camera without ownership. A call to
reqbufs > 0 (and s_fmt) will take ownership, and the ownership will be
released at reqbufs = 0. While ownership is assigned, the eventfd that
should be signaled (and cleared) by V4L2Camera and V4L2CameraProxy is
set to the V4L2CameraFile that has ownership, and is cleared when the
ownership is released. In case close() is called without a
reqbufs = 0 first, the ownership is also released on close().
We also use the V4L2CameraFile to contain all the information specific
to an open instance of the file. This removes the need to keep track of
such information within V4L2CameraProxy via multiple maps from int fd to
info.
Since V4L2 does not expect reqbufs 0 to ever return error, make
V4L2CameraProxy::freeBuffers() return void.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Prepare for using the V4L2CameraFile as a container for file-specific
information in the V4L2 compatibility layer by making it a required
argument for all V4L2CameraProxy calls that are directed from
V4L2CompatManager, which are intercepted via LD_PRELOAD. Change
V4L2CameraFile accordingly.
Also change V4L2CompatManager accordingly. Instead of keeping a map of
file descriptors to V4L2CameraProxy instances, we keep a map of
V4L2CameraFile instances to V4L2CameraProxy instances. When the
proxy methods are called, feed the file as a parameter.
The dup function is also modified, in that it is removed from
V4L2CameraProxy, and is handled completely in V4L2CompatManager, as a
map from file descriptors to V4L2CameraFile instances.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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With relation to opening files, the kernel has three objects related to
files:
- inodes, that represent files on disk
- file objects, that are allocated at open() time and store all data
related to the open file
- file descriptors, that are integers that map to a file
In the V4L2 compatibility layer, V4L2CameraProxy, which wraps a single
libcamera camera via V4L2Camera, is more or less equivalent to the
inode. We also already have file descriptors (that are really eventfds)
that mirror the file descriptors. Here we create a V4L2CameraFile to
model the file objects, to contain information related to the open file,
namely if the file has been opened as non-blocking, and the V4L2
priority (to support VIDIOC_G/S_PRIORITY later on). This new class
allows us to more cleanly support multiple open later on, since we can
move out of V4L2CameraProxy the handling of mapping the fd to the open
file information.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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These formats can be helpful when downstream applications or libraries
support them natively (avoiding a costly conversion).
Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>
Tested-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Some applications (eg. Firefox, Google Chrome, Skype) use open64,
openat64, and mmap64 instead of their non-64 versions that we currently
intercept. Intercept these calls as well. _LARGEFILE64_SOURCE needs to
be set so that the 64-bit symbols are available and not synonymous to
the non-64-bit versions on 64-bit systems.
Also, since we set _FILE_OFFSET_BITS to 32 to force the various open and
mmap symbols that we export to not be the 64-bit versions, our dlsym to
get the original open and mmap calls will not automatically be converted
to their 64-bit versions. Since we intercept both 32-bit and 64-bit
versions of open and mmap, we should be using the 64-bit version to
service both. Fetch the 64-bit versions of openat and mmap directly.
musl defines the 64-bit symbols as macros that are equivalent to the
non-64-bit symbols, so we put compile guards that check if the 64-bit
symbols are defined.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # Compile with musl
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Use the new pixel format constants to replace usage of macros from
drm_fourcc.h.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
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