[PATCH v3 1/2] libcamera: Extend u32 control type
Cheng-Hao Yang
chenghaoyang at chromium.org
Fri Oct 25 17:40:02 CEST 2024
Hi Jacopo,
On Fri, Oct 25, 2024 at 5:15 PM Jacopo Mondi
<jacopo.mondi at ideasonboard.com> wrote:
>
> Hi Harvey
>
> On Fri, Oct 25, 2024 at 05:30:13AM +0000, Harvey Yang wrote:
> > From: Yudhistira Erlandinata <yerlandinata at chromium.org>
> >
> > V4L2 Controls support a wide variety of types not yet supported by the
> > ControlValue type system.
> >
> > Extend the libcamera ControlValue types to support an explicit 32 bit
> > unsigned integer type, and map that to the corresponding
> > V4L2_CTRL_TYPE_U32 type within the v4l2_device support class.
>
> V4L2_CTRL_TYPE_U32 is a control compound type.
>
> /* Compound types are >= 0x0100 */
> V4L2_CTRL_COMPOUND_TYPES = 0x0100,
> V4L2_CTRL_TYPE_U8 = 0x0100,
> V4L2_CTRL_TYPE_U16 = 0x0101,
> V4L2_CTRL_TYPE_U32 = 0x0102,
> V4L2_CTRL_TYPE_AREA = 0x0106,
>
> This means it carries a payload and needs to be handled like
> V4L2_CTRL_TYPE_U8 is, specifcially when it comes to parsing it from
> the V4L2 interface into a libcamera control.
>
> I'm surprised you don't hit this in V4L2Device::getControls()
>
> if (info.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD) {
> ControlType type;
>
> switch (info.type) {
> case V4L2_CTRL_TYPE_U8:
> type = ControlTypeByte;
> break;
>
> default:
> LOG(V4L2, Error)
> << "Unsupported payload control type "
> << info.type;
> return {};
> }
>
Thanks! Added for U32 and U16.
> >
> > Signed-off-by: Yudhistira Erlandinata <yerlandinata at chromium.org>
> > Co-developed-by: Harvey Yang <chenghaoyang at chromium.org>
> > Signed-off-by: Harvey Yang <chenghaoyang at chromium.org>
> > ---
> > include/libcamera/controls.h | 7 ++++++
> > src/libcamera/controls.cpp | 12 ++++++++--
> > src/libcamera/v4l2_device.cpp | 13 +++++++++++
> > test/controls/control_value.cpp | 40 +++++++++++++++++++++++++++++++++
> > 4 files changed, 70 insertions(+), 2 deletions(-)
> >
> > diff --git a/include/libcamera/controls.h b/include/libcamera/controls.h
> > index ca60bbaca..6da8ad2c3 100644
> > --- a/include/libcamera/controls.h
> > +++ b/include/libcamera/controls.h
> > @@ -29,6 +29,7 @@ enum ControlType {
> > ControlTypeNone,
> > ControlTypeBool,
> > ControlTypeByte,
> > + ControlTypeUnsigned32,
> > ControlTypeInteger32,
> > ControlTypeInteger64,
> > ControlTypeFloat,
> > @@ -62,6 +63,12 @@ struct control_type<uint8_t> {
> > static constexpr std::size_t size = 0;
> > };
> >
> > +template<>
> > +struct control_type<uint32_t> {
> > + static constexpr ControlType value = ControlTypeUnsigned32;
> > + static constexpr std::size_t size = 0;
> > +};
> > +
> > template<>
> > struct control_type<int32_t> {
> > static constexpr ControlType value = ControlTypeInteger32;
> > diff --git a/src/libcamera/controls.cpp b/src/libcamera/controls.cpp
> > index 62185d643..8ae295191 100644
> > --- a/src/libcamera/controls.cpp
> > +++ b/src/libcamera/controls.cpp
> > @@ -54,6 +54,7 @@ static constexpr size_t ControlValueSize[] = {
> > [ControlTypeNone] = 0,
> > [ControlTypeBool] = sizeof(bool),
> > [ControlTypeByte] = sizeof(uint8_t),
> > + [ControlTypeUnsigned32] = sizeof(uint32_t),
> > [ControlTypeInteger32] = sizeof(int32_t),
> > [ControlTypeInteger64] = sizeof(int64_t),
> > [ControlTypeFloat] = sizeof(float),
> > @@ -74,10 +75,12 @@ static constexpr size_t ControlValueSize[] = {
> > * The control stores a boolean value
> > * \var ControlTypeByte
> > * The control stores a byte value as an unsigned 8-bit integer
> > + * \var ControlTypeUnsigned32
> > + * The control stores an unsigned 32-bit integer value
> > * \var ControlTypeInteger32
> > - * The control stores a 32-bit integer value
> > + * The control stores a signed 32-bit integer value
> > * \var ControlTypeInteger64
> > - * The control stores a 64-bit integer value
> > + * The control stores a signed 64-bit integer value
> > * \var ControlTypeFloat
> > * The control stores a 32-bit floating point value
> > * \var ControlTypeString
> > @@ -230,6 +233,11 @@ std::string ControlValue::toString() const
> > str += std::to_string(*value);
> > break;
> > }
> > + case ControlTypeUnsigned32: {
> > + const uint32_t *value = reinterpret_cast<const uint32_t *>(data);
> > + str += std::to_string(*value);
> > + break;
> > + }
> > case ControlTypeInteger32: {
> > const int32_t *value = reinterpret_cast<const int32_t *>(data);
> > str += std::to_string(*value);
> > diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp
> > index 68add4f2e..0ba8dcfa0 100644
> > --- a/src/libcamera/v4l2_device.cpp
> > +++ b/src/libcamera/v4l2_device.cpp
> > @@ -9,6 +9,7 @@
> >
> > #include <fcntl.h>
> > #include <map>
> > +#include <stdint.h>
> > #include <stdlib.h>
> > #include <string.h>
> > #include <sys/ioctl.h>
> > @@ -17,11 +18,14 @@
> > #include <vector>
> >
> > #include <linux/v4l2-mediabus.h>
> > +#include <linux/videodev2.h>
>
> Included by the header file
Removed.
>
> >
> > #include <libcamera/base/event_notifier.h>
> > #include <libcamera/base/log.h>
> > #include <libcamera/base/utils.h>
> >
> > +#include <libcamera/controls.h>
> > +
>
> This as well
Removed.
BR,
Harvey
>
> > #include "libcamera/internal/formats.h"
> > #include "libcamera/internal/sysfs.h"
> >
> > @@ -488,6 +492,9 @@ ControlType V4L2Device::v4l2CtrlType(uint32_t ctrlType)
> > case V4L2_CTRL_TYPE_BOOLEAN:
> > return ControlTypeBool;
> >
> > + case V4L2_CTRL_TYPE_U32:
> > + return ControlTypeUnsigned32;
> > +
> > case V4L2_CTRL_TYPE_INTEGER:
> > return ControlTypeInteger32;
> >
> > @@ -536,6 +543,11 @@ std::optional<ControlInfo> V4L2Device::v4l2ControlInfo(const v4l2_query_ext_ctrl
> > static_cast<uint8_t>(ctrl.maximum),
> > static_cast<uint8_t>(ctrl.default_value));
> >
> > + case V4L2_CTRL_TYPE_U32:
> > + return ControlInfo(static_cast<uint32_t>(ctrl.minimum),
> > + static_cast<uint32_t>(ctrl.maximum),
> > + static_cast<uint32_t>(ctrl.default_value));
> > +
> > case V4L2_CTRL_TYPE_BOOLEAN:
> > return ControlInfo(static_cast<bool>(ctrl.minimum),
> > static_cast<bool>(ctrl.maximum),
> > @@ -622,6 +634,7 @@ void V4L2Device::listControls()
> > case V4L2_CTRL_TYPE_BITMASK:
> > case V4L2_CTRL_TYPE_INTEGER_MENU:
> > case V4L2_CTRL_TYPE_U8:
> > + case V4L2_CTRL_TYPE_U32:
> > break;
> > /* \todo Support other control types. */
> > default:
> > diff --git a/test/controls/control_value.cpp b/test/controls/control_value.cpp
> > index 344107fae..6ca85b739 100644
> > --- a/test/controls/control_value.cpp
> > +++ b/test/controls/control_value.cpp
> > @@ -109,6 +109,46 @@ protected:
> > return TestFail;
> > }
> >
> > + /*
> > + * Unsigned Integer32 type.
> > + */
> > + value.set(static_cast<uint32_t>(42));
> > + if (value.isNone() || value.isArray() ||
> > + value.type() != ControlTypeUnsigned32) {
> > + cerr << "Control type mismatch after setting to uint32_t" << endl;
> > + return TestFail;
> > + }
> > +
> > + if (value.get<uint32_t>() != 42) {
> > + cerr << "Control value mismatch after setting to uint32_t" << endl;
> > + return TestFail;
> > + }
> > +
> > + if (value.toString() != "42") {
> > + cerr << "Control string mismatch after setting to uint32_t" << endl;
> > + return TestFail;
> > + }
> > +
> > + std::array<uint32_t, 4> uint32s{ 3, 14, 15, 9 };
> > + value.set(Span<uint32_t>(uint32s));
> > + if (value.isNone() || !value.isArray() ||
> > + value.type() != ControlTypeUnsigned32) {
> > + cerr << "Control type mismatch after setting to uint32_t array" << endl;
> > + return TestFail;
> > + }
> > +
> > + Span<const uint32_t> uint32sResult = value.get<Span<const uint32_t>>();
> > + if (uint32s.size() != uint32sResult.size() ||
> > + !std::equal(uint32s.begin(), uint32s.end(), uint32sResult.begin())) {
> > + cerr << "Control value mismatch after setting to uint32_t array" << endl;
> > + return TestFail;
> > + }
> > +
> > + if (value.toString() != "[ 3, 14, 15, 9 ]") {
> > + cerr << "Control string mismatch after setting to uint32_t array" << endl;
> > + return TestFail;
> > + }
> > +
> > /*
> > * Integer32 type.
> > */
> > --
> > 2.47.0.163.g1226f6d8fa-goog
> >
More information about the libcamera-devel
mailing list