626172a16b
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>
626 lines
19 KiB
C++
626 lines
19 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2020, Google Inc.
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*
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* Image Processing Algorithm data serializer
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*/
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#include "libcamera/internal/ipa_data_serializer.h"
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#include <unistd.h>
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#include <libcamera/base/log.h>
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/**
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* \file ipa_data_serializer.h
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* \brief IPA Data Serializer
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*/
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namespace libcamera {
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LOG_DEFINE_CATEGORY(IPADataSerializer)
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/**
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* \class IPADataSerializer
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* \brief IPA Data Serializer
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*
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* Static template class that provides functions for serializing and
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* deserializing IPA data.
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*
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* \todo Switch to Span instead of byte and fd vector
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*
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* \todo Harden the vector and map deserializer
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*
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* \todo For SharedFDs, instead of storing a validity flag, store an
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* index into the fd array. This will allow us to use views instead of copying.
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*/
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namespace {
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/**
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* \fn template<typename T> void appendPOD(std::vector<uint8_t> &vec, T val)
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* \brief Append POD to end of byte vector, in little-endian order
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* \tparam T Type of POD to append
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* \param[in] vec Byte vector to append to
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* \param[in] val Value to append
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*
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* This function is meant to be used by the IPA data serializer, and the
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* generated IPA proxies.
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*/
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/**
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* \fn template<typename T> T readPOD(std::vector<uint8_t>::iterator it, size_t pos,
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* std::vector<uint8_t>::iterator end)
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* \brief Read POD from byte vector, in little-endian order
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* \tparam T Type of POD to read
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* \param[in] it Iterator of byte vector to read from
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* \param[in] pos Index in byte vector to read from
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* \param[in] end Iterator marking end of byte vector
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*
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* This function is meant to be used by the IPA data serializer, and the
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* generated IPA proxies.
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*
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* If the \a pos plus the byte-width of the desired POD is past \a end, it is
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* a fata error will occur, as it means there is insufficient data for
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* deserialization, which should never happen.
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*
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* \return The POD read from \a it at index \a pos
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*/
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/**
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* \fn template<typename T> T readPOD(std::vector<uint8_t> &vec, size_t pos)
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* \brief Read POD from byte vector, in little-endian order
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* \tparam T Type of POD to read
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* \param[in] vec Byte vector to read from
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* \param[in] pos Index in vec to start reading from
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*
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* This function is meant to be used by the IPA data serializer, and the
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* generated IPA proxies.
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*
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* If the \a pos plus the byte-width of the desired POD is past the end of
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* \a vec, a fatal error will occur, as it means there is insufficient data
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* for deserialization, which should never happen.
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*
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* \return The POD read from \a vec at index \a pos
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*/
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} /* namespace */
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/**
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* \fn template<typename T> IPADataSerializer<T>::serialize(
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* T data,
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* ControlSerializer *cs = nullptr)
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* \brief Serialize an object into byte vector and fd vector
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* \tparam T Type of object to serialize
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* \param[in] data Object to serialize
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* \param[in] cs ControlSerializer
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*
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* \a cs is only necessary if the object type \a T or its members contain
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* ControlList or ControlInfoMap.
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*
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* \return Tuple of byte vector and fd vector, that is the serialized form
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* of \a data
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*/
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/**
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* \fn template<typename T> IPADataSerializer<T>::deserialize(
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* const std::vector<uint8_t> &data,
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* ControlSerializer *cs = nullptr)
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* \brief Deserialize byte vector into an object
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* \tparam T Type of object to deserialize to
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* \param[in] data Byte vector to deserialize from
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* \param[in] cs ControlSerializer
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*
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* This version of deserialize() can be used if the object type \a T and its
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* members don't have any SharedFD.
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*
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* \a cs is only necessary if the object type \a T or its members contain
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* ControlList or ControlInfoMap.
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*
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* \return The deserialized object
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*/
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/**
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* \fn template<typename T> IPADataSerializer<T>::deserialize(
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* std::vector<uint8_t>::const_iterator dataBegin,
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* std::vector<uint8_t>::const_iterator dataEnd,
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* ControlSerializer *cs = nullptr)
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* \brief Deserialize byte vector into an object
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* \tparam T Type of object to deserialize to
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* \param[in] dataBegin Begin iterator of byte vector to deserialize from
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* \param[in] dataEnd End iterator of byte vector to deserialize from
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* \param[in] cs ControlSerializer
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*
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* This version of deserialize() can be used if the object type \a T and its
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* members don't have any SharedFD.
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*
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* \a cs is only necessary if the object type \a T or its members contain
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* ControlList or ControlInfoMap.
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*
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* \return The deserialized object
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*/
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/**
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* \fn template<typename T> IPADataSerializer<T>::deserialize(
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* const std::vector<uint8_t> &data,
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* const std::vector<SharedFD> &fds,
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* ControlSerializer *cs = nullptr)
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* \brief Deserialize byte vector and fd vector into an object
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* \tparam T Type of object to deserialize to
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* \param[in] data Byte vector to deserialize from
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* \param[in] fds Fd vector to deserialize from
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* \param[in] cs ControlSerializer
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*
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* This version of deserialize() (or the iterator version) must be used if
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* the object type \a T or its members contain SharedFD.
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*
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* \a cs is only necessary if the object type \a T or its members contain
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* ControlList or ControlInfoMap.
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*
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* \return The deserialized object
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*/
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/**
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* \fn template<typename T> IPADataSerializer::deserialize(
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* std::vector<uint8_t>::const_iterator dataBegin,
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* std::vector<uint8_t>::const_iterator dataEnd,
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* std::vector<SharedFD>::const_iterator fdsBegin,
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* std::vector<SharedFD>::const_iterator fdsEnd,
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* ControlSerializer *cs = nullptr)
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* \brief Deserialize byte vector and fd vector into an object
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* \tparam T Type of object to deserialize to
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* \param[in] dataBegin Begin iterator of byte vector to deserialize from
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* \param[in] dataEnd End iterator of byte vector to deserialize from
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* \param[in] fdsBegin Begin iterator of fd vector to deserialize from
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* \param[in] fdsEnd End iterator of fd vector to deserialize from
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* \param[in] cs ControlSerializer
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*
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* This version of deserialize() (or the vector version) must be used if
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* the object type \a T or its members contain SharedFD.
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*
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* \a cs is only necessary if the object type \a T or its members contain
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* ControlList or ControlInfoMap.
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*
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* \return The deserialized object
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*/
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#ifndef __DOXYGEN__
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#define DEFINE_POD_SERIALIZER(type) \
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\
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template<> \
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std::tuple<std::vector<uint8_t>, std::vector<SharedFD>> \
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IPADataSerializer<type>::serialize(const type &data, \
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[[maybe_unused]] ControlSerializer *cs) \
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{ \
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std::vector<uint8_t> dataVec; \
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dataVec.reserve(sizeof(type)); \
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appendPOD<type>(dataVec, data); \
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\
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return { dataVec, {} }; \
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} \
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\
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template<> \
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type IPADataSerializer<type>::deserialize(std::vector<uint8_t>::const_iterator dataBegin, \
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std::vector<uint8_t>::const_iterator dataEnd, \
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[[maybe_unused]] ControlSerializer *cs) \
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{ \
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return readPOD<type>(dataBegin, 0, dataEnd); \
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} \
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\
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template<> \
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type IPADataSerializer<type>::deserialize(const std::vector<uint8_t> &data, \
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ControlSerializer *cs) \
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{ \
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return deserialize(data.cbegin(), data.end(), cs); \
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} \
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\
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template<> \
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type IPADataSerializer<type>::deserialize(const std::vector<uint8_t> &data, \
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[[maybe_unused]] const std::vector<SharedFD> &fds, \
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ControlSerializer *cs) \
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{ \
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return deserialize(data.cbegin(), data.end(), cs); \
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} \
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\
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template<> \
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type IPADataSerializer<type>::deserialize(std::vector<uint8_t>::const_iterator dataBegin, \
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std::vector<uint8_t>::const_iterator dataEnd, \
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[[maybe_unused]] std::vector<SharedFD>::const_iterator fdsBegin, \
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[[maybe_unused]] std::vector<SharedFD>::const_iterator fdsEnd, \
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ControlSerializer *cs) \
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{ \
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return deserialize(dataBegin, dataEnd, cs); \
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}
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DEFINE_POD_SERIALIZER(bool)
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DEFINE_POD_SERIALIZER(uint8_t)
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DEFINE_POD_SERIALIZER(uint16_t)
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DEFINE_POD_SERIALIZER(uint32_t)
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DEFINE_POD_SERIALIZER(uint64_t)
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DEFINE_POD_SERIALIZER(int8_t)
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DEFINE_POD_SERIALIZER(int16_t)
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DEFINE_POD_SERIALIZER(int32_t)
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DEFINE_POD_SERIALIZER(int64_t)
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DEFINE_POD_SERIALIZER(float)
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DEFINE_POD_SERIALIZER(double)
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/*
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* Strings are serialized simply by converting by {string.cbegin(), string.end()}.
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* The size of the string is recorded by the container (struct, vector, map, or
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* function parameter serdes).
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*/
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template<>
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std::tuple<std::vector<uint8_t>, std::vector<SharedFD>>
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IPADataSerializer<std::string>::serialize(const std::string &data,
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[[maybe_unused]] ControlSerializer *cs)
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{
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return { { data.cbegin(), data.end() }, {} };
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}
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template<>
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std::string
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IPADataSerializer<std::string>::deserialize(const std::vector<uint8_t> &data,
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[[maybe_unused]] ControlSerializer *cs)
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{
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return { data.cbegin(), data.cend() };
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}
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template<>
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std::string
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IPADataSerializer<std::string>::deserialize(std::vector<uint8_t>::const_iterator dataBegin,
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std::vector<uint8_t>::const_iterator dataEnd,
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[[maybe_unused]] ControlSerializer *cs)
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{
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return { dataBegin, dataEnd };
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}
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template<>
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std::string
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IPADataSerializer<std::string>::deserialize(const std::vector<uint8_t> &data,
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[[maybe_unused]] const std::vector<SharedFD> &fds,
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[[maybe_unused]] ControlSerializer *cs)
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{
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return { data.cbegin(), data.cend() };
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}
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template<>
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std::string
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IPADataSerializer<std::string>::deserialize(std::vector<uint8_t>::const_iterator dataBegin,
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std::vector<uint8_t>::const_iterator dataEnd,
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[[maybe_unused]] std::vector<SharedFD>::const_iterator fdsBegin,
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[[maybe_unused]] std::vector<SharedFD>::const_iterator fdsEnd,
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[[maybe_unused]] ControlSerializer *cs)
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{
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return { dataBegin, dataEnd };
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}
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/*
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* ControlList is serialized as:
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*
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* 4 bytes - uint32_t Size of serialized ControlInfoMap, in bytes
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* 4 bytes - uint32_t Size of serialized ControlList, in bytes
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* X bytes - Serialized ControlInfoMap (using ControlSerializer)
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* X bytes - Serialized ControlList (using ControlSerializer)
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*
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* If data.infoMap() is nullptr, then the default controls::controls will
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* be used. The serialized ControlInfoMap will have zero length.
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*/
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template<>
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std::tuple<std::vector<uint8_t>, std::vector<SharedFD>>
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IPADataSerializer<ControlList>::serialize(const ControlList &data, ControlSerializer *cs)
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{
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if (!cs)
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LOG(IPADataSerializer, Fatal)
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<< "ControlSerializer not provided for serialization of ControlList";
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size_t size;
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std::vector<uint8_t> infoData;
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int ret;
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/*
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* \todo Revisit this opportunistic serialization of the
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* ControlInfoMap, as it could be fragile
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*/
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if (data.infoMap() && !cs->isCached(*data.infoMap())) {
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size = cs->binarySize(*data.infoMap());
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infoData.resize(size);
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ByteStreamBuffer buffer(infoData.data(), infoData.size());
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ret = cs->serialize(*data.infoMap(), buffer);
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if (ret < 0 || buffer.overflow()) {
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LOG(IPADataSerializer, Error) << "Failed to serialize ControlList's ControlInfoMap";
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return { {}, {} };
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}
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}
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size = cs->binarySize(data);
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std::vector<uint8_t> listData(size);
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ByteStreamBuffer buffer(listData.data(), listData.size());
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ret = cs->serialize(data, buffer);
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if (ret < 0 || buffer.overflow()) {
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LOG(IPADataSerializer, Error) << "Failed to serialize ControlList";
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return { {}, {} };
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}
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std::vector<uint8_t> dataVec;
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dataVec.reserve(8 + infoData.size() + listData.size());
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appendPOD<uint32_t>(dataVec, infoData.size());
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appendPOD<uint32_t>(dataVec, listData.size());
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dataVec.insert(dataVec.end(), infoData.begin(), infoData.end());
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dataVec.insert(dataVec.end(), listData.begin(), listData.end());
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return { dataVec, {} };
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}
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template<>
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ControlList
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IPADataSerializer<ControlList>::deserialize(std::vector<uint8_t>::const_iterator dataBegin,
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std::vector<uint8_t>::const_iterator dataEnd,
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ControlSerializer *cs)
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{
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if (!cs)
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LOG(IPADataSerializer, Fatal)
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<< "ControlSerializer not provided for deserialization of ControlList";
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if (std::distance(dataBegin, dataEnd) < 8)
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return {};
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uint32_t infoDataSize = readPOD<uint32_t>(dataBegin, 0, dataEnd);
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uint32_t listDataSize = readPOD<uint32_t>(dataBegin, 4, dataEnd);
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std::vector<uint8_t>::const_iterator it = dataBegin + 8;
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if (infoDataSize + listDataSize < infoDataSize ||
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static_cast<uint32_t>(std::distance(it, dataEnd)) < infoDataSize + listDataSize)
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return {};
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if (infoDataSize > 0) {
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ByteStreamBuffer buffer(&*it, infoDataSize);
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ControlInfoMap map = cs->deserialize<ControlInfoMap>(buffer);
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/* It's fine if map is empty. */
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if (buffer.overflow()) {
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LOG(IPADataSerializer, Error)
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<< "Failed to deserialize ControlLists's ControlInfoMap: buffer overflow";
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return ControlList();
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}
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}
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it += infoDataSize;
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ByteStreamBuffer buffer(&*it, listDataSize);
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ControlList list = cs->deserialize<ControlList>(buffer);
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if (buffer.overflow())
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LOG(IPADataSerializer, Error) << "Failed to deserialize ControlList: buffer overflow";
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return list;
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}
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template<>
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ControlList
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IPADataSerializer<ControlList>::deserialize(const std::vector<uint8_t> &data,
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ControlSerializer *cs)
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{
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return deserialize(data.cbegin(), data.end(), cs);
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}
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template<>
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ControlList
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IPADataSerializer<ControlList>::deserialize(const std::vector<uint8_t> &data,
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[[maybe_unused]] const std::vector<SharedFD> &fds,
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ControlSerializer *cs)
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{
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return deserialize(data.cbegin(), data.end(), cs);
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}
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template<>
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ControlList
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IPADataSerializer<ControlList>::deserialize(std::vector<uint8_t>::const_iterator dataBegin,
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std::vector<uint8_t>::const_iterator dataEnd,
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[[maybe_unused]] std::vector<SharedFD>::const_iterator fdsBegin,
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[[maybe_unused]] std::vector<SharedFD>::const_iterator fdsEnd,
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ControlSerializer *cs)
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{
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return deserialize(dataBegin, dataEnd, cs);
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}
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/*
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* const ControlInfoMap is serialized as:
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*
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* 4 bytes - uint32_t Size of serialized ControlInfoMap, in bytes
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* X bytes - Serialized ControlInfoMap (using ControlSerializer)
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*/
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template<>
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std::tuple<std::vector<uint8_t>, std::vector<SharedFD>>
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IPADataSerializer<ControlInfoMap>::serialize(const ControlInfoMap &map,
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ControlSerializer *cs)
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{
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if (!cs)
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LOG(IPADataSerializer, Fatal)
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<< "ControlSerializer not provided for serialization of ControlInfoMap";
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size_t size = cs->binarySize(map);
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std::vector<uint8_t> infoData(size);
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ByteStreamBuffer buffer(infoData.data(), infoData.size());
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int ret = cs->serialize(map, buffer);
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if (ret < 0 || buffer.overflow()) {
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LOG(IPADataSerializer, Error) << "Failed to serialize ControlInfoMap";
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return { {}, {} };
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}
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std::vector<uint8_t> dataVec;
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appendPOD<uint32_t>(dataVec, infoData.size());
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dataVec.insert(dataVec.end(), infoData.begin(), infoData.end());
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return { dataVec, {} };
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}
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template<>
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ControlInfoMap
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IPADataSerializer<ControlInfoMap>::deserialize(std::vector<uint8_t>::const_iterator dataBegin,
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std::vector<uint8_t>::const_iterator dataEnd,
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ControlSerializer *cs)
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{
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if (!cs)
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LOG(IPADataSerializer, Fatal)
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<< "ControlSerializer not provided for deserialization of ControlInfoMap";
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if (std::distance(dataBegin, dataEnd) < 4)
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return {};
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|
|
|
uint32_t infoDataSize = readPOD<uint32_t>(dataBegin, 0, dataEnd);
|
|
|
|
std::vector<uint8_t>::const_iterator it = dataBegin + 4;
|
|
|
|
if (static_cast<uint32_t>(std::distance(it, dataEnd)) < infoDataSize)
|
|
return {};
|
|
|
|
ByteStreamBuffer buffer(&*it, infoDataSize);
|
|
ControlInfoMap map = cs->deserialize<ControlInfoMap>(buffer);
|
|
|
|
return map;
|
|
}
|
|
|
|
template<>
|
|
ControlInfoMap
|
|
IPADataSerializer<ControlInfoMap>::deserialize(const std::vector<uint8_t> &data,
|
|
ControlSerializer *cs)
|
|
{
|
|
return deserialize(data.cbegin(), data.end(), cs);
|
|
}
|
|
|
|
template<>
|
|
ControlInfoMap
|
|
IPADataSerializer<ControlInfoMap>::deserialize(const std::vector<uint8_t> &data,
|
|
[[maybe_unused]] const std::vector<SharedFD> &fds,
|
|
ControlSerializer *cs)
|
|
{
|
|
return deserialize(data.cbegin(), data.end(), cs);
|
|
}
|
|
|
|
template<>
|
|
ControlInfoMap
|
|
IPADataSerializer<ControlInfoMap>::deserialize(std::vector<uint8_t>::const_iterator dataBegin,
|
|
std::vector<uint8_t>::const_iterator dataEnd,
|
|
[[maybe_unused]] std::vector<SharedFD>::const_iterator fdsBegin,
|
|
[[maybe_unused]] std::vector<SharedFD>::const_iterator fdsEnd,
|
|
ControlSerializer *cs)
|
|
{
|
|
return deserialize(dataBegin, dataEnd, cs);
|
|
}
|
|
|
|
/*
|
|
* SharedFD instances are serialized into four bytes that tells if the SharedFD
|
|
* is valid or not. If it is valid, then for serialization the fd will be
|
|
* written to the fd vector, or for deserialization the fd vector const_iterator
|
|
* will be valid.
|
|
*
|
|
* This validity is necessary so that we don't send -1 fd over sendmsg(). It
|
|
* also allows us to simply send the entire fd vector into the deserializer
|
|
* and it will be recursively consumed as necessary.
|
|
*/
|
|
template<>
|
|
std::tuple<std::vector<uint8_t>, std::vector<SharedFD>>
|
|
IPADataSerializer<SharedFD>::serialize(const SharedFD &data,
|
|
[[maybe_unused]] ControlSerializer *cs)
|
|
{
|
|
std::vector<uint8_t> dataVec;
|
|
std::vector<SharedFD> fdVec;
|
|
|
|
/*
|
|
* Store as uint32_t to prepare for conversion from validity flag
|
|
* to index, and for alignment.
|
|
*/
|
|
appendPOD<uint32_t>(dataVec, data.isValid());
|
|
|
|
if (data.isValid())
|
|
fdVec.push_back(data);
|
|
|
|
|
|
return { dataVec, fdVec };
|
|
}
|
|
|
|
template<>
|
|
SharedFD IPADataSerializer<SharedFD>::deserialize([[maybe_unused]] std::vector<uint8_t>::const_iterator dataBegin,
|
|
[[maybe_unused]] std::vector<uint8_t>::const_iterator dataEnd,
|
|
std::vector<SharedFD>::const_iterator fdsBegin,
|
|
std::vector<SharedFD>::const_iterator fdsEnd,
|
|
[[maybe_unused]] ControlSerializer *cs)
|
|
{
|
|
ASSERT(std::distance(dataBegin, dataEnd) >= 4);
|
|
|
|
uint32_t valid = readPOD<uint32_t>(dataBegin, 0, dataEnd);
|
|
|
|
ASSERT(!(valid && std::distance(fdsBegin, fdsEnd) < 1));
|
|
|
|
return valid ? *fdsBegin : SharedFD();
|
|
}
|
|
|
|
template<>
|
|
SharedFD IPADataSerializer<SharedFD>::deserialize(const std::vector<uint8_t> &data,
|
|
const std::vector<SharedFD> &fds,
|
|
[[maybe_unused]] ControlSerializer *cs)
|
|
{
|
|
return deserialize(data.cbegin(), data.end(), fds.cbegin(), fds.end());
|
|
}
|
|
|
|
/*
|
|
* FrameBuffer::Plane is serialized as:
|
|
*
|
|
* 4 byte - SharedFD
|
|
* 4 bytes - uint32_t Offset
|
|
* 4 bytes - uint32_t Length
|
|
*/
|
|
template<>
|
|
std::tuple<std::vector<uint8_t>, std::vector<SharedFD>>
|
|
IPADataSerializer<FrameBuffer::Plane>::serialize(const FrameBuffer::Plane &data,
|
|
[[maybe_unused]] ControlSerializer *cs)
|
|
{
|
|
std::vector<uint8_t> dataVec;
|
|
std::vector<SharedFD> fdsVec;
|
|
|
|
std::vector<uint8_t> fdBuf;
|
|
std::vector<SharedFD> fdFds;
|
|
std::tie(fdBuf, fdFds) =
|
|
IPADataSerializer<SharedFD>::serialize(data.fd);
|
|
dataVec.insert(dataVec.end(), fdBuf.begin(), fdBuf.end());
|
|
fdsVec.insert(fdsVec.end(), fdFds.begin(), fdFds.end());
|
|
|
|
appendPOD<uint32_t>(dataVec, data.offset);
|
|
appendPOD<uint32_t>(dataVec, data.length);
|
|
|
|
return { dataVec, fdsVec };
|
|
}
|
|
|
|
template<>
|
|
FrameBuffer::Plane
|
|
IPADataSerializer<FrameBuffer::Plane>::deserialize(std::vector<uint8_t>::const_iterator dataBegin,
|
|
std::vector<uint8_t>::const_iterator dataEnd,
|
|
std::vector<SharedFD>::const_iterator fdsBegin,
|
|
[[maybe_unused]] std::vector<SharedFD>::const_iterator fdsEnd,
|
|
[[maybe_unused]] ControlSerializer *cs)
|
|
{
|
|
FrameBuffer::Plane ret;
|
|
|
|
ret.fd = IPADataSerializer<SharedFD>::deserialize(dataBegin, dataBegin + 4,
|
|
fdsBegin, fdsBegin + 1);
|
|
ret.offset = readPOD<uint32_t>(dataBegin, 4, dataEnd);
|
|
ret.length = readPOD<uint32_t>(dataBegin, 8, dataEnd);
|
|
|
|
return ret;
|
|
}
|
|
|
|
template<>
|
|
FrameBuffer::Plane
|
|
IPADataSerializer<FrameBuffer::Plane>::deserialize(const std::vector<uint8_t> &data,
|
|
const std::vector<SharedFD> &fds,
|
|
ControlSerializer *cs)
|
|
{
|
|
return deserialize(data.cbegin(), data.end(), fds.cbegin(), fds.end(), cs);
|
|
}
|
|
|
|
#endif /* __DOXYGEN__ */
|
|
|
|
} /* namespace libcamera */
|