From 1c0096d7517afca568e642dac6ffce894a5098fb Mon Sep 17 00:00:00 2001
From: Jacopo Mondi <jacopo@jmondi.org>
Date: Fri, 18 Dec 2020 15:51:39 +0100
Subject: libcamera: bayer_format: Add support for mbus codes
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The existing implementation of the BayerFormat class supports
converting a V4L2PixelFormat to a BayerFormat and vice-versa.
Expand the class by adding support for converting a media bus code
to a BayerFormat instance, by providing a conversion table and a
dedicated static methods.
Do not provide support for converting a BayerFormat to a media bus code
as there's no 1-to-1 mapping between the two.
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
---
src/libcamera/bayer_format.cpp | 55 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
(limited to 'src')
diff --git a/src/libcamera/bayer_format.cpp b/src/libcamera/bayer_format.cpp
index c42792ff..a6a40be0 100644
--- a/src/libcamera/bayer_format.cpp
+++ b/src/libcamera/bayer_format.cpp
@@ -8,6 +8,9 @@
#include "libcamera/internal/bayer_format.h"
#include <map>
+#include <unordered_map>
+
+#include <linux/media-bus-format.h>
#include <libcamera/transform.h>
@@ -140,6 +143,41 @@ const std::map<BayerFormat, V4L2PixelFormat, BayerFormatComparator> bayerToV4l2{
{ { BayerFormat::RGGB, 16, BayerFormat::None }, V4L2PixelFormat(V4L2_PIX_FMT_SRGGB16) },
};
+const std::unordered_map<unsigned int, BayerFormat> mbusCodeToBayer{
+ { MEDIA_BUS_FMT_SBGGR8_1X8, { BayerFormat::BGGR, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGBRG8_1X8, { BayerFormat::GBRG, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGRBG8_1X8, { BayerFormat::GRBG, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SRGGB8_1X8, { BayerFormat::RGGB, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SBGGR10_ALAW8_1X8, { BayerFormat::BGGR, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGBRG10_ALAW8_1X8, { BayerFormat::GBRG, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8, { BayerFormat::GRBG, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SRGGB10_ALAW8_1X8, { BayerFormat::RGGB, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8, { BayerFormat::BGGR, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8, { BayerFormat::GBRG, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8, { BayerFormat::GRBG, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8, { BayerFormat::RGGB, 8, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE, { BayerFormat::BGGR, 10, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, { BayerFormat::BGGR, 10, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE, { BayerFormat::BGGR, 10, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE, { BayerFormat::BGGR, 10, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SBGGR10_1X10, { BayerFormat::BGGR, 10, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGBRG10_1X10, { BayerFormat::GBRG, 10, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGRBG10_1X10, { BayerFormat::GRBG, 10, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SRGGB10_1X10, { BayerFormat::RGGB, 10, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SBGGR12_1X12, { BayerFormat::BGGR, 12, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGBRG12_1X12, { BayerFormat::GBRG, 12, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGRBG12_1X12, { BayerFormat::GRBG, 12, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SRGGB12_1X12, { BayerFormat::RGGB, 12, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SBGGR14_1X14, { BayerFormat::BGGR, 14, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGBRG14_1X14, { BayerFormat::GBRG, 14, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGRBG14_1X14, { BayerFormat::GRBG, 14, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SRGGB14_1X14, { BayerFormat::RGGB, 14, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SBGGR16_1X16, { BayerFormat::BGGR, 16, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGBRG16_1X16, { BayerFormat::GBRG, 16, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SGRBG16_1X16, { BayerFormat::GRBG, 16, BayerFormat::None } },
+ { MEDIA_BUS_FMT_SRGGB16_1X16, { BayerFormat::RGGB, 16, BayerFormat::None } },
+};
+
} /* namespace */
/**
@@ -169,6 +207,23 @@ BayerFormat::BayerFormat(V4L2PixelFormat v4l2Format)
*this = it->second;
}
+/**
+ * \brief Retrieve the BayerFormat associated with a media bus code
+ * \param[in] mbusCode The media bus code to convert into a BayerFormat
+ *
+ * The media bus code numeric identifiers are defined by the V4L2 specification.
+ */
+const BayerFormat &BayerFormat::fromMbusCode(unsigned int mbusCode)
+{
+ static BayerFormat empty;
+
+ const auto it = mbusCodeToBayer.find(mbusCode);
+ if (it == mbusCodeToBayer.end())
+ return empty;
+ else
+ return it->second;
+}
+
/**
* \fn BayerFormat::isValid()
* \brief Return whether a BayerFormat is valid
--
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