libcamera: v4l2subdev: Print mbus string instead of code

Modify toString() to print mbus format name instead of its hex code as
the name is easier to understand.

Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Acked-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 99 insertions, 79 deletions

diff --git a/src/libcamera/v4l2_subdevice.cpp b/src/libcamera/v4l2_subdevice.cpp
index 7aefc1be..32c6c7ac 100644
--- a/src/libcamera/v4l2_subdevice.cpp
+++ b/src/libcamera/v4l2_subdevice.cpp
@@ -36,83 +36,95 @@ LOG_DECLARE_CATEGORY(V4L2)
 namespace {
 
 /*
+ * \struct V4L2SubdeviceFormatInfo
+ * \brief Information about media bus formats
+ * \param bitsPerPixel Bits per pixel
+ * \param name Name of MBUS format
+ */
+struct V4L2SubdeviceFormatInfo {
+	unsigned int bitsPerPixel;
+	const char *name;
+};
+
+/*
  * \var formatInfoMap
- * \brief A map that associates bits per pixel to V4L2 media bus codes
+ * \brief A map that associates V4L2SubdeviceFormatInfo struct 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 },
+const std::map<uint32_t, V4L2SubdeviceFormatInfo> formatInfoMap = {
+	{ V4L2_MBUS_FMT_RGB444_2X8_PADHI_BE, { 16, "RGB444_2X8_PADHI_BE" } },
+	{ V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE, { 16, "RGB444_2X8_PADHI_LE" } },
+	{ V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE, { 16, "RGB555_2X8_PADHI_BE" } },
+	{ V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE, { 16, "RGB555_2X8_PADHI_LE" } },
+	{ V4L2_MBUS_FMT_BGR565_2X8_BE, { 16, "BGR565_2X8_BE" } },
+	{ V4L2_MBUS_FMT_BGR565_2X8_LE, { 16, "BGR565_2X8_LE" } },
+	{ V4L2_MBUS_FMT_RGB565_2X8_BE, { 16, "RGB565_2X8_BE" } },
+	{ V4L2_MBUS_FMT_RGB565_2X8_LE, { 16, "RGB565_2X8_LE" } },
+	{ V4L2_MBUS_FMT_RGB666_1X18, { 18, "RGB666_1X18" } },
+	{ V4L2_MBUS_FMT_RGB888_1X24, { 24, "RGB888_1X24" } },
+	{ V4L2_MBUS_FMT_RGB888_2X12_BE, { 24, "RGB888_2X12_BE" } },
+	{ V4L2_MBUS_FMT_RGB888_2X12_LE, { 24, "RGB888_2X12_LE" } },
+	{ V4L2_MBUS_FMT_ARGB8888_1X32, { 32, "ARGB8888_1X32" } },
+	{ V4L2_MBUS_FMT_Y8_1X8, { 8, "Y8_1X8" } },
+	{ V4L2_MBUS_FMT_UV8_1X8, { 8, "UV8_1X8" } },
+	{ V4L2_MBUS_FMT_UYVY8_1_5X8, { 12, "UYVY8_1_5X8" } },
+	{ V4L2_MBUS_FMT_VYUY8_1_5X8, { 12, "VYUY8_1_5X8" } },
+	{ V4L2_MBUS_FMT_YUYV8_1_5X8, { 12, "YUYV8_1_5X8" } },
+	{ V4L2_MBUS_FMT_YVYU8_1_5X8, { 12, "YVYU8_1_5X8" } },
+	{ V4L2_MBUS_FMT_UYVY8_2X8, { 16, "UYVY8_2X8" } },
+	{ V4L2_MBUS_FMT_VYUY8_2X8, { 16, "VYUY8_2X8" } },
+	{ V4L2_MBUS_FMT_YUYV8_2X8, { 16, "YUYV8_2X8" } },
+	{ V4L2_MBUS_FMT_YVYU8_2X8, { 16, "YVYU8_2X8" } },
+	{ V4L2_MBUS_FMT_Y10_1X10, { 10, "Y10_1X10" } },
+	{ V4L2_MBUS_FMT_UYVY10_2X10, { 20, "UYVY10_2X10" } },
+	{ V4L2_MBUS_FMT_VYUY10_2X10, { 20, "VYUY10_2X10" } },
+	{ V4L2_MBUS_FMT_YUYV10_2X10, { 20, "YUYV10_2X10" } },
+	{ V4L2_MBUS_FMT_YVYU10_2X10, { 20, "YVYU10_2X10" } },
+	{ V4L2_MBUS_FMT_Y12_1X12, { 12, "Y12_1X12" } },
+	{ V4L2_MBUS_FMT_UYVY8_1X16, { 16, "UYVY8_1X16" } },
+	{ V4L2_MBUS_FMT_VYUY8_1X16, { 16, "VYUY8_1X16" } },
+	{ V4L2_MBUS_FMT_YUYV8_1X16, { 16, "YUYV8_1X16" } },
+	{ V4L2_MBUS_FMT_YVYU8_1X16, { 16, "YVYU8_1X16" } },
+	{ V4L2_MBUS_FMT_YDYUYDYV8_1X16, { 16, "YDYUYDYV8_1X16" } },
+	{ V4L2_MBUS_FMT_UYVY10_1X20, { 20, "UYVY10_1X20" } },
+	{ V4L2_MBUS_FMT_VYUY10_1X20, { 20, "VYUY10_1X20" } },
+	{ V4L2_MBUS_FMT_YUYV10_1X20, { 20, "YUYV10_1X20" } },
+	{ V4L2_MBUS_FMT_YVYU10_1X20, { 20, "YVYU10_1X20" } },
+	{ V4L2_MBUS_FMT_YUV10_1X30, { 30, "YUV10_1X30" } },
+	{ V4L2_MBUS_FMT_AYUV8_1X32, { 32, "AYUV8_1X32" } },
+	{ V4L2_MBUS_FMT_UYVY12_2X12, { 24, "UYVY12_2X12" } },
+	{ V4L2_MBUS_FMT_VYUY12_2X12, { 24, "VYUY12_2X12" } },
+	{ V4L2_MBUS_FMT_YUYV12_2X12, { 24, "YUYV12_2X12" } },
+	{ V4L2_MBUS_FMT_YVYU12_2X12, { 24, "YVYU12_2X12" } },
+	{ V4L2_MBUS_FMT_UYVY12_1X24, { 24, "UYVY12_1X24" } },
+	{ V4L2_MBUS_FMT_VYUY12_1X24, { 24, "VYUY12_1X24" } },
+	{ V4L2_MBUS_FMT_YUYV12_1X24, { 24, "YUYV12_1X24" } },
+	{ V4L2_MBUS_FMT_YVYU12_1X24, { 24, "YVYU12_1X24" } },
+	{ V4L2_MBUS_FMT_SBGGR8_1X8, { 8, "SBGGR8_1X8" } },
+	{ V4L2_MBUS_FMT_SGBRG8_1X8, { 8, "SGBRG8_1X8" } },
+	{ V4L2_MBUS_FMT_SGRBG8_1X8, { 8, "SGRBG8_1X8" } },
+	{ V4L2_MBUS_FMT_SRGGB8_1X8, { 8, "SRGGB8_1X8" } },
+	{ V4L2_MBUS_FMT_SBGGR10_ALAW8_1X8, { 8, "SBGGR10_ALAW8_1X8" } },
+	{ V4L2_MBUS_FMT_SGBRG10_ALAW8_1X8, { 8, "SGBRG10_ALAW8_1X8" } },
+	{ V4L2_MBUS_FMT_SGRBG10_ALAW8_1X8, { 8, "SGRBG10_ALAW8_1X8" } },
+	{ V4L2_MBUS_FMT_SRGGB10_ALAW8_1X8, { 8, "SRGGB10_ALAW8_1X8" } },
+	{ V4L2_MBUS_FMT_SBGGR10_DPCM8_1X8, { 8, "SBGGR10_DPCM8_1X8" } },
+	{ V4L2_MBUS_FMT_SGBRG10_DPCM8_1X8, { 8, "SGBRG10_DPCM8_1X8" } },
+	{ V4L2_MBUS_FMT_SGRBG10_DPCM8_1X8, { 8, "SGRBG10_DPCM8_1X8" } },
+	{ V4L2_MBUS_FMT_SRGGB10_DPCM8_1X8, { 8, "SRGGB10_DPCM8_1X8" } },
+	{ V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE, { 16, "SBGGR10_2X8_PADHI_BE" } },
+	{ V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE, { 16, "SBGGR10_2X8_PADHI_LE" } },
+	{ V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE, { 16, "SBGGR10_2X8_PADLO_BE" } },
+	{ V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE, { 16, "SBGGR10_2X8_PADLO_LE" } },
+	{ V4L2_MBUS_FMT_SBGGR10_1X10, { 10, "SBGGR10_1X10" } },
+	{ V4L2_MBUS_FMT_SGBRG10_1X10, { 10, "SGBRG10_1X10" } },
+	{ V4L2_MBUS_FMT_SGRBG10_1X10, { 10, "SGRBG10_1X10" } },
+	{ V4L2_MBUS_FMT_SRGGB10_1X10, { 10, "SRGGB10_1X10" } },
+	{ V4L2_MBUS_FMT_SBGGR12_1X12, { 12, "SBGGR12_1X12" } },
+	{ V4L2_MBUS_FMT_SGBRG12_1X12, { 12, "SGBRG12_1X12" } },
+	{ V4L2_MBUS_FMT_SGRBG12_1X12, { 12, "SGRBG12_1X12" } },
+	{ V4L2_MBUS_FMT_SRGGB12_1X12, { 12, "SRGGB12_1X12" } },
+	{ V4L2_MBUS_FMT_AHSV8888_1X32, { 32, "AHSV8888_1X32" } },
 };
 
 } /* namespace */
@@ -161,9 +173,17 @@ const std::map<uint32_t, unsigned int> formatInfoMap = {
  */
 const std::string V4L2SubdeviceFormat::toString() const
 {
-	std::stringstream ss;
-	ss << size.toString() << "-" << utils::hex(mbus_code, 4);
-	return ss.str();
+	std::stringstream mbus;
+	mbus << size.toString() << "-";
+
+	const auto it = formatInfoMap.find(mbus_code);
+
+	if (it == formatInfoMap.end())
+		mbus << utils::hex(mbus_code, 4);
+	else
+		mbus << it->second.name;
+
+	return mbus.str();
 }
 
 /**
@@ -180,7 +200,7 @@ uint8_t V4L2SubdeviceFormat::bitsPerPixel() const
 		return 0;
 	}
 
-	return it->second;
+	return it->second.bitsPerPixel;
 }
 
 /**