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libcamera: v4l2_subdevice: Add format information

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Define a map of static information associated with a media bus code.
Start by reporting the bits-per-pixel for each media bus code defined by
the V4L2 kernel API, to later expand it when necessary.

Add to the V4L2SubdeviceFormat class a method to return the bits per
pixel, retrieved by inspecting the static map of format information.

While at it, remove a rogue map inclusion from header file.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
This commit is contained in:
Jacopo Mondi 2020-03-31 13:01:19 +02:00
parent 56baa28a79
commit 5db1426b60
2 changed files with 103 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/libcamera/include/v4l2_subdevice.h
View file

@ -7,7 +7,6 @@
#ifndef __LIBCAMERA_V4L2_SUBDEVICE_H__
#define __LIBCAMERA_V4L2_SUBDEVICE_H__
#include <map>
#include <string>
#include <vector>
@ -27,6 +26,7 @@ struct V4L2SubdeviceFormat {
Size size;
const std::string toString() const;
uint8_t bitsPerPixel() const;
};
class V4L2Subdevice : public V4L2Device

102
src/libcamera/v4l2_subdevice.cpp
View file

@ -14,6 +14,7 @@
#include <sys/ioctl.h>
#include <unistd.h>
#include <linux/media-bus-format.h>
#include <linux/v4l2-subdev.h>
#include <libcamera/geometry.h>
@ -32,6 +33,90 @@ namespace libcamera {
LOG_DECLARE_CATEGORY(V4L2)
namespace {
/*
* \var formatInfoMap
* \brief A map that associates bits per pixel to V4L2 media bus codes
*/
const std::map<uint32_t, unsigned int> formatInfoMap = {
{ V4L2_MBUS_FMT_RGB444_2X8_PADHI_BE, 16 },
{ V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE, 16 },
{ V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE, 16 },
{ V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE, 16 },
{ V4L2_MBUS_FMT_BGR565_2X8_BE, 16 },
{ V4L2_MBUS_FMT_BGR565_2X8_LE, 16 },
{ V4L2_MBUS_FMT_RGB565_2X8_BE, 16 },
{ V4L2_MBUS_FMT_RGB565_2X8_LE, 16 },
{ V4L2_MBUS_FMT_RGB666_1X18, 18 },
{ V4L2_MBUS_FMT_RGB888_1X24, 24 },
{ V4L2_MBUS_FMT_RGB888_2X12_BE, 24 },
{ V4L2_MBUS_FMT_RGB888_2X12_LE, 24 },
{ V4L2_MBUS_FMT_ARGB8888_1X32, 32 },
{ V4L2_MBUS_FMT_Y8_1X8, 8 },
{ V4L2_MBUS_FMT_UV8_1X8, 8 },
{ V4L2_MBUS_FMT_UYVY8_1_5X8, 12 },
{ V4L2_MBUS_FMT_VYUY8_1_5X8, 12 },
{ V4L2_MBUS_FMT_YUYV8_1_5X8, 12 },
{ V4L2_MBUS_FMT_YVYU8_1_5X8, 12 },
{ V4L2_MBUS_FMT_UYVY8_2X8, 16 },
{ V4L2_MBUS_FMT_VYUY8_2X8, 16 },
{ V4L2_MBUS_FMT_YUYV8_2X8, 16 },
{ V4L2_MBUS_FMT_YVYU8_2X8, 16 },
{ V4L2_MBUS_FMT_Y10_1X10, 10 },
{ V4L2_MBUS_FMT_UYVY10_2X10, 20 },
{ V4L2_MBUS_FMT_VYUY10_2X10, 20 },
{ V4L2_MBUS_FMT_YUYV10_2X10, 20 },
{ V4L2_MBUS_FMT_YVYU10_2X10, 20 },
{ V4L2_MBUS_FMT_Y12_1X12, 12 },
{ V4L2_MBUS_FMT_UYVY8_1X16, 16 },
{ V4L2_MBUS_FMT_VYUY8_1X16, 16 },
{ V4L2_MBUS_FMT_YUYV8_1X16, 16 },
{ V4L2_MBUS_FMT_YVYU8_1X16, 16 },
{ V4L2_MBUS_FMT_YDYUYDYV8_1X16, 16 },
{ V4L2_MBUS_FMT_UYVY10_1X20, 20 },
{ V4L2_MBUS_FMT_VYUY10_1X20, 20 },
{ V4L2_MBUS_FMT_YUYV10_1X20, 20 },
{ V4L2_MBUS_FMT_YVYU10_1X20, 20 },
{ V4L2_MBUS_FMT_YUV10_1X30, 30 },
{ V4L2_MBUS_FMT_AYUV8_1X32, 32 },
{ V4L2_MBUS_FMT_UYVY12_2X12, 24 },
{ V4L2_MBUS_FMT_VYUY12_2X12, 24 },
{ V4L2_MBUS_FMT_YUYV12_2X12, 24 },
{ V4L2_MBUS_FMT_YVYU12_2X12, 24 },
{ V4L2_MBUS_FMT_UYVY12_1X24, 24 },
{ V4L2_MBUS_FMT_VYUY12_1X24, 24 },
{ V4L2_MBUS_FMT_YUYV12_1X24, 24 },
{ V4L2_MBUS_FMT_YVYU12_1X24, 24 },
{ V4L2_MBUS_FMT_SBGGR8_1X8, 8 },
{ V4L2_MBUS_FMT_SGBRG8_1X8, 8 },
{ V4L2_MBUS_FMT_SGRBG8_1X8, 8 },
{ V4L2_MBUS_FMT_SRGGB8_1X8, 8 },
{ V4L2_MBUS_FMT_SBGGR10_ALAW8_1X8, 8 },
{ V4L2_MBUS_FMT_SGBRG10_ALAW8_1X8, 8 },
{ V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8, 8 },
{ V4L2_MBUS_FMT_SRGGB10_ALAW8_1X8, 8 },
{ V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8, 8 },
{ V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8, 8 },
{ V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, 8 },
{ V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8, 8 },
{ V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE, 16 },
{ V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE, 16 },
{ V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE, 16 },
{ V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE, 16 },
{ V4L2_MBUS_FMT_SBGGR10_1X10, 10 },
{ V4L2_MBUS_FMT_SGBRG10_1X10, 10 },
{ V4L2_MBUS_FMT_SGRBG10_1X10, 10 },
{ V4L2_MBUS_FMT_SRGGB10_1X10, 10 },
{ V4L2_MBUS_FMT_SBGGR12_1X12, 12 },
{ V4L2_MBUS_FMT_SGBRG12_1X12, 12 },
{ V4L2_MBUS_FMT_SGRBG12_1X12, 12 },
{ V4L2_MBUS_FMT_SRGGB12_1X12, 12 },
{ V4L2_MBUS_FMT_AHSV8888_1X32, 32 },
};
} /* namespace */
/**
* \struct V4L2SubdeviceFormat
* \brief The V4L2 sub-device image format and sizes
@ -81,6 +166,23 @@ const std::string V4L2SubdeviceFormat::toString() const
return ss.str();
}
/**
* \brief Retrieve the number of bits per pixel for the V4L2 subdevice format
* \return The number of bits per pixel for the format, or 0 if the format is
* not supported
*/
uint8_t V4L2SubdeviceFormat::bitsPerPixel() const
{
const auto it = formatInfoMap.find(mbus_code);
if (it == formatInfoMap.end()) {
LOG(V4L2, Error) << "No information available for format '"
<< toString() << "'";
return 0;
}
return it->second;
}
/**
* \class V4L2Subdevice
* \brief A V4L2 subdevice as exposed by the Linux kernel