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libcamera: controls: Make ControlValue get/set accessors template methods

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The ControlValue get accessors are implemented with functions of
different names, whlie the set accessors use polymorphism to support
different control types. This isn't very consistent and intuitive. Make
the API clearer by using template methods. This will also have the added
advantage that support for the new types will only require adding
template specialisations, without adding new methods.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
This commit is contained in:
Laurent Pinchart
2019-09-28 00:40:51 +03:00
parent c5dfd9d57e
commit 224ef9776a
7 changed files with 69 additions and 81 deletions
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src/libcamera/controls.cpp
+41 -50
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@@ -90,77 +90,68 @@ ControlValue::ControlValue(int64_t value)
*/
/**
* \brief Set the value with a boolean
* \param[in] value Boolean value to store
*/
void ControlValue::set(bool value)
{
type_ = ControlTypeBool;
bool_ = value;
}
/**
* \brief Set the value with an integer
* \param[in] value Integer value to store
*/
void ControlValue::set(int value)
{
type_ = ControlTypeInteger;
integer_ = value;
}
/**
* \brief Set the value with a 64 bit integer
* \param[in] value 64 bit integer value to store
*/
void ControlValue::set(int64_t value)
{
type_ = ControlTypeInteger64;
integer64_ = value;
}
/**
* \brief Get the boolean value
* \fn template<typename T> const T &ControlValue::get() const
* \brief Get the control value
*
* The value type must be Boolean.
* The control value type shall match the type T, otherwise the behaviour is
* undefined.
*
* \return The boolean value
* \return The control value
*/
bool ControlValue::getBool() const
/**
* \fn template<typename T> void ControlValue::set(const T &value)
* \brief Set the control value to \a value
* \param[in] value The control value
*/
#ifndef __DOXYGEN__
template<>
const bool &ControlValue::get<bool>() const
{
ASSERT(type_ == ControlTypeBool);
return bool_;
}
/**
* \brief Get the integer value
*
* The value type must be Integer or Integer64.
*
* \return The integer value
*/
int ControlValue::getInt() const
template<>
const int &ControlValue::get<int>() const
{
ASSERT(type_ == ControlTypeInteger || type_ == ControlTypeInteger64);
return integer_;
}
/**
* \brief Get the 64-bit integer value
*
* The value type must be Integer or Integer64.
*
* \return The 64-bit integer value
*/
int64_t ControlValue::getInt64() const
template<>
const int64_t &ControlValue::get<int64_t>() const
{
ASSERT(type_ == ControlTypeInteger || type_ == ControlTypeInteger64);
return integer64_;
}
template<>
void ControlValue::set<bool>(const bool &value)
{
type_ = ControlTypeBool;
bool_ = value;
}
template<>
void ControlValue::set<int>(const int &value)
{
type_ = ControlTypeInteger;
integer_ = value;
}
template<>
void ControlValue::set<int64_t>(const int64_t &value)
{
type_ = ControlTypeInteger64;
integer64_ = value;
}
#endif /* __DOXYGEN__ */
/**
* \brief Assemble and return a string describing the value
* \return A string describing the ControlValue