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Unlike in C where they have been standardized since C99, variable-length
arrays in C++ are an extension supported by gcc and clang. Clang started
warning about this with -Wall in version 18:
src/libcamera/ipc_unixsocket.cpp:250:11: error: variable length arrays in C++ are a Clang extension [-Werror,-Wvla-cxx-extension]
250 | char buf[CMSG_SPACE(num * sizeof(uint32_t))];
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
One simple option is to disable the warning. However, usage of VLAs in
C++ is discouraged by some, usually due to security reasons, based on
the rationale that developers are often unaware of unintentional use of
VLAs and how they may affect the security of the code when the array
size is not properly validated.
This rationale may sound dubious, as the most commonly proposed fix is
to replace VLAs with vectors (or just arrays dynamically allocated with
new() wrapped in unique pointers), without adding any size validation.
This will not produce much better results. However, keeping the VLA
warning and converting the code to dynamic allocation may still be
slightly better, as it can prompt developers to notice VLAs and check if
size validation is required.
For these reasons, convert all VLAs to std::vector. Most of the VLAs
don't need extra size validation, as the size is bound through different
constraints (e.g. image width for line buffers). An arguable exception
may be the buffers in IPCUnixSocket::sendData() and
IPCUnixSocket::recvData() as the number of fds is not bound-checked
locally, but we will run out of file descriptors before we could
overflow the buffer size calculation.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Acked-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
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The 16-bit padded raw 10 and raw 12 formats are stored in memory in
little endian order, regardless of the machine's endianness. Read pixel
data as uint8_t values and hardcode bit shifting to little endian to fix
scanline packing.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
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The 16-bit padded raw 10 and raw 12 formats are stored in memory in
little endian order, regardless of the machine's endianness. Swap the
16-bit values on big-endian machines when reading pixels from memory to
generate thumbnails.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
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Add support for RAW10 and RAW12 to the dng_writer. This is needed on
imx8mp to produce tuning images. Both formats were tested on a debix
som with a imx335.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add a thumbnail function for raw formats that are 16bit aligned.
This is needed for the upcoming RAW10 and RAW12 implemntation.
Use the new function for RAW16 as the thumbScanlineRaw_CSI2P produces
incorrect results for that format (it averages over adjacent bytes,
which works for the CSI formats).
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The old names lead to confusions. Rename to better express the intent.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Add support for RAW16 formats to the DNGWriter helpers so that we can
produce dng files from the mali-c55.
Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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In libtiff version 4.5.1 and later the CFA* tags were missing. This got
fixed in https://gitlab.com/libtiff/libtiff/-/commit/49856998c3d82e65444b47bb4fb11b7830a0c2be
Unfortunately the fix is not released yet, but the faulty libtiff is
contained in current buildroot. As a local fix is pretty easy and
without side effects, let's workaround that.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Multiple local functions are defined in the global namespace without the
static keyword. This compiles fine for now, but will cause a missing
declaration warning when we enable them. To prepare for that, move the
function declaration to an anonymous namespace.
While at it, for consistency, include an existing static function in the
namespace and drop the static keyword.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Source files in libcamera start by a comment block header, which
includes the file name and a one-line description of the file contents.
While the latter is useful to get a quick overview of the file contents
at a glance, the former is mostly a source of inconvenience. The name in
the comments can easily get out of sync with the file name when files
are renamed, and copy & paste during development have often lead to
incorrect names being used to start with.
Readers of the source code are expected to know which file they're
looking it. Drop the file name from the header comment block.
The change was generated with the following script:
----------------------------------------
dirs="include/libcamera src test utils"
declare -rA patterns=(
['c']=' \* '
['cpp']=' \* '
['h']=' \* '
['py']='# '
['sh']='# '
)
for ext in ${!patterns[@]} ; do
files=$(for dir in $dirs ; do find $dir -name "*.${ext}" ; done)
pattern=${patterns[${ext}]}
for file in $files ; do
name=$(basename ${file})
sed -i "s/^\(${pattern}\)${name} - /\1/" "$file"
done
done
----------------------------------------
This misses several files that are out of sync with the comment block
header. Those will be addressed separately and manually.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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Clearly all cases in the switch are already satisfied, but some
compilers fail to realize this and spit out an error:
Compiler version: gcc 11.2.0 "aarch64-buildroot-linux-gnu-gcc.br_real (Buildroot 2021.11) 11.2.0"
../../src/apps/common/dng_writer.cpp: In function ‘void thumbScanlineIPU3(const FormatInfo&, void*, const void*, unsigned int, unsigned int)’:
../../src/apps/common/dng_writer.cpp:277:55: error: ‘val4’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
277 | uint8_t value = (val1 + val2 + val3 + val4) >> 10;
| ^~~~
../../src/apps/common/dng_writer.cpp:277:48: error: ‘val3’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
277 | uint8_t value = (val1 + val2 + val3 + val4) >> 10;
| ^~~~
../../src/apps/common/dng_writer.cpp:277:41: error: ‘val2’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
277 | uint8_t value = (val1 + val2 + val3 + val4) >> 10;
| ^~~~
../../src/apps/common/dng_writer.cpp:277:34: error: ‘val1’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
277 | uint8_t value = (val1 + val2 + val3 + val4) >> 10;
| ^~~~
Add a default case for the switch-case on a modulo to silence this.
Bug: https://bugs.libcamera.org/show_bug.cgi?id=207
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>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Multiple source files in the src/apps/cam/ directory are used by cam,
qcam and lc-compliance. They are compiled separately for each
application. Move them to a new src/apps/common/ directory and compile
them in a static library to decrease the number of compilation
operations.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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