[libcamera-devel] [PATCH 1/3] libcamera: controls: Add std::string and double ControlValue type.
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Tue Feb 18 02:03:32 CET 2020
Hi Naush,
Thank you for the patch.
On Mon, Feb 17, 2020 at 02:26:07PM +0000, Naushir Patuck wrote:
> Strings are a convenient control type for controls such as
> AWB mode ("indoor", "outdoor", "halogen", etc.) or AGC mode ("sports",
> "long exposure", "spot", etc.).
>
> Double control values are useful for control values such as EV and even
> gains.
>
> This commit adds support for std::string and double control types.
> Functionality such as ControlRange on std::string types do not really
> make sense, so do nothing with that for now. Also add appropriate test
> for the new ControlValue types.
Jacopo has posted a patch that adds support for Float controls. I'm
currently reworking it as part of the work on compound controls. Do you
think there's a need to support both float and double, or is one of the
For strings, the feature is useful, but I'd like to implement it as part
of the compound controls work (or on top of it) if you don't mind, as
I'm already adding support for dynamic allocation of control data which
can be useful for strings. Would that be OK with you ?
> Signed-off-by: Naushir Patuck <naush at raspberrypi.com>
> ---
> include/libcamera/controls.h | 6 +++
> src/libcamera/controls.cpp | 72 ++++++++++++++++++++++++++++++++-
> test/controls/control_value.cpp | 26 ++++++++++++
> 3 files changed, 103 insertions(+), 1 deletion(-)
>
> diff --git a/include/libcamera/controls.h b/include/libcamera/controls.h
> index 458b84e..ac74122 100644
> --- a/include/libcamera/controls.h
> +++ b/include/libcamera/controls.h
> @@ -20,6 +20,8 @@ enum ControlType {
> ControlTypeBool,
> ControlTypeInteger32,
> ControlTypeInteger64,
> + ControlTypeString,
> + ControlTypeDouble,
> };
>
> class ControlValue
> @@ -29,6 +31,8 @@ public:
> ControlValue(bool value);
> ControlValue(int32_t value);
> ControlValue(int64_t value);
> + ControlValue(std::string value);
> + ControlValue(double value);
>
> ControlType type() const { return type_; }
> bool isNone() const { return type_ == ControlTypeNone; }
> @@ -53,7 +57,9 @@ private:
> bool bool_;
> int32_t integer32_;
> int64_t integer64_;
> + double double_;
> };
> + std::string string_;
> };
>
> class ControlId
> diff --git a/src/libcamera/controls.cpp b/src/libcamera/controls.cpp
> index 0031cd0..6eb79c9 100644
> --- a/src/libcamera/controls.cpp
> +++ b/src/libcamera/controls.cpp
> @@ -58,6 +58,10 @@ LOG_DEFINE_CATEGORY(Controls)
> * The control stores a 32-bit integer value
> * \var ControlTypeInteger64
> * The control stores a 64-bit integer value
> + * \var ControlTypeString
> + * The control stores a std::string value
> + * \var ControlTypeDouble
> + * The control stores a double value
> */
>
> /**
> @@ -100,6 +104,24 @@ ControlValue::ControlValue(int64_t value)
> {
> }
>
> +/**
> + * \brief Construct a std::string ControlValue
> + * \param[in] value String value to store
> + */
> +ControlValue::ControlValue(std::string value)
> + : type_(ControlTypeString), string_(value)
> +{
> +}
> +
> +/**
> + * \brief Construct a double ControlValue
> + * \param[in] value Double value to store
> + */
> +ControlValue::ControlValue(double value)
> + : type_(ControlTypeDouble), double_(value)
> +{
> +}
> +
> /**
> * \fn ControlValue::type()
> * \brief Retrieve the data type of the value
> @@ -153,6 +175,18 @@ const int64_t &ControlValue::get<int64_t>() const
> return integer64_;
> }
>
> +template<>
> +const std::string &ControlValue::get<std::string>() const
> +{
> + return string_;
> +}
> +
> +template<>
> +const double &ControlValue::get<double>() const
> +{
> + return double_;
> +}
> +
> template<>
> void ControlValue::set<bool>(const bool &value)
> {
> @@ -173,6 +207,21 @@ void ControlValue::set<int64_t>(const int64_t &value)
> type_ = ControlTypeInteger64;
> integer64_ = value;
> }
> +
> +template<>
> +void ControlValue::set<std::string>(const std::string &value)
> +{
> + type_ = ControlTypeString;
> + string_ = value;
> +}
> +
> +template<>
> +void ControlValue::set<double>(const double &value)
> +{
> + type_ = ControlTypeDouble;
> + double_ = value;
> +}
> +
> #endif /* __DOXYGEN__ */
>
> /**
> @@ -190,6 +239,10 @@ std::string ControlValue::toString() const
> return std::to_string(integer32_);
> case ControlTypeInteger64:
> return std::to_string(integer64_);
> + case ControlTypeString:
> + return string_;
> + case ControlTypeDouble:
> + return std::to_string(double_);
> }
>
> return "<ValueType Error>";
> @@ -211,6 +264,10 @@ bool ControlValue::operator==(const ControlValue &other) const
> return integer32_ == other.integer32_;
> case ControlTypeInteger64:
> return integer64_ == other.integer64_;
> + case ControlTypeString:
> + return string_ == other.string_;
> + case ControlTypeDouble:
> + return double_ == other.double_;
> default:
> return false;
> }
> @@ -341,6 +398,18 @@ Control<int64_t>::Control(unsigned int id, const char *name)
> : ControlId(id, name, ControlTypeInteger64)
> {
> }
> +
> +template<>
> +Control<std::string>::Control(unsigned int id, const char *name)
> + : ControlId(id, name, ControlTypeString)
> +{
> +}
> +
> +template<>
> +Control<double>::Control(unsigned int id, const char *name)
> + : ControlId(id, name, ControlTypeDouble)
> +{
> +}
> #endif /* __DOXYGEN__ */
>
> /**
> @@ -583,7 +652,8 @@ void ControlInfoMap::generateIdmap()
> idmap_.clear();
>
> for (const auto &ctrl : *this) {
> - if (ctrl.first->type() != ctrl.second.min().type()) {
> + if (ctrl.first->type() != ControlTypeString &&
> + (ctrl.first->type() != ctrl.second.min().type())) {
> LOG(Controls, Error)
> << "Control " << utils::hex(ctrl.first->id())
> << " type and range type mismatch";
> diff --git a/test/controls/control_value.cpp b/test/controls/control_value.cpp
> index a1ffa84..55174da 100644
> --- a/test/controls/control_value.cpp
> +++ b/test/controls/control_value.cpp
> @@ -21,10 +21,14 @@ protected:
> {
> ControlValue integer(1234);
> ControlValue boolean(true);
> + ControlValue fractional(3.142);
Let's not name this fractional, as I think we'll need rational controls
in the future. Maybe s/fractional/real/ ?
> + ControlValue string(std::string("MyString"));
>
> /* Just a string conversion output test... no validation */
> cout << "Int: " << integer.toString()
> << " Bool: " << boolean.toString()
> + << " Frac: " << fractional.toString()
> + << " String: " << string.toString()
> << endl;
>
> if (integer.get<int32_t>() != 1234) {
> @@ -37,6 +41,16 @@ protected:
> return TestFail;
> }
>
> + if (fractional.get<double>() != 3.142) {
> + cerr << "Failed to get Fractional" << endl;
> + return TestFail;
> + }
> +
> + if (string.get<std::string>() != std::string("MyString")) {
> + cerr << "Failed to get String" << endl;
> + return TestFail;
> + }
> +
> /* Test an uninitialised value, and updating it. */
>
> ControlValue value;
> @@ -62,6 +76,18 @@ protected:
> return TestFail;
> }
>
> + value.set<double>(2.718);
> + if (value.get<double>() != 2.718) {
> + cerr << "Failed to get Fractional" << endl;
> + return TestFail;
> + }
> +
> + value.set<std::string>(std::string("Test"));
> + if (value.get<std::string>() != std::string("Test")) {
> + cerr << "Failed to get String" << endl;
> + return TestFail;
> + }
> +
> return TestPass;
> }
> };
--
Regards,
Laurent Pinchart
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