[libcamera-devel] [PATCH v4 5/7] libcamera: v4l2_subdevice: Add format information
Jacopo Mondi
jacopo at jmondi.org
Mon Apr 27 23:32:34 CEST 2020
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 there, remove a rouge map inclusion from header file.
Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
---
src/libcamera/include/v4l2_subdevice.h | 2 +-
src/libcamera/v4l2_subdevice.cpp | 104 +++++++++++++++++++++++++
2 files changed, 105 insertions(+), 1 deletion(-)
diff --git a/src/libcamera/include/v4l2_subdevice.h b/src/libcamera/include/v4l2_subdevice.h
index 27ba5b17f61e..d0e565dbdaab 100644
--- a/src/libcamera/include/v4l2_subdevice.h
+++ b/src/libcamera/include/v4l2_subdevice.h
@@ -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
diff --git a/src/libcamera/v4l2_subdevice.cpp b/src/libcamera/v4l2_subdevice.cpp
index 74788ce7cf4f..93fe4b8c3d32 100644
--- a/src/libcamera/v4l2_subdevice.cpp
+++ b/src/libcamera/v4l2_subdevice.cpp
@@ -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 +33,92 @@ 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, uint8_t> 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, 40 },
+ { V4L2_MBUS_FMT_VYUY8_1_5X8, 40 },
+ { V4L2_MBUS_FMT_YUYV8_1_5X8, 40 },
+ { V4L2_MBUS_FMT_YVYU8_1_5X8, 40 },
+ { 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, 24 },
+ { V4L2_MBUS_FMT_SGBRG12_1X12, 24 },
+ { V4L2_MBUS_FMT_SGRBG12_1X12, 24 },
+ { V4L2_MBUS_FMT_SRGGB12_1X12, 24 },
+ { V4L2_MBUS_FMT_JPEG_1X8, 8 },
+ { V4L2_MBUS_FMT_S5C_UYVY_JPEG_1X8, 8 },
+ { V4L2_MBUS_FMT_AHSV8888_1X32, 32 },
+};
+
+}; /* namespace */
+
/**
* \struct V4L2SubdeviceFormat
* \brief The V4L2 sub-device image format and sizes
@@ -81,6 +168,23 @@ 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 default it to 8 if
+ * the format's media bus code 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
--
2.26.1
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