apps: Share common source between applications

Multiple source files in the src/apps/cam/ directory are used by cam,
qcam and lc-compliance. They are compiled separately for each
application. Move them to a new src/apps/common/ directory and compile
them in a static library to decrease the number of compilation
operations.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 0 insertions, 653 deletions

diff --git a/src/apps/cam/dng_writer.cpp b/src/apps/cam/dng_writer.cpp
deleted file mode 100644
index c945edce..00000000
--- a/src/apps/cam/dng_writer.cpp
+++ /dev/null
@@ -1,653 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-/*
- * Copyright (C) 2020, Raspberry Pi Ltd
- *
- * dng_writer.cpp - DNG writer
- */
-
-#include "dng_writer.h"
-
-#include <algorithm>
-#include <iostream>
-#include <map>
-
-#include <tiffio.h>
-
-#include <libcamera/control_ids.h>
-#include <libcamera/formats.h>
-#include <libcamera/property_ids.h>
-
-using namespace libcamera;
-
-enum CFAPatternColour : uint8_t {
-	CFAPatternRed = 0,
-	CFAPatternGreen = 1,
-	CFAPatternBlue = 2,
-};
-
-struct FormatInfo {
-	uint8_t bitsPerSample;
-	CFAPatternColour pattern[4];
-	void (*packScanline)(void *output, const void *input,
-			     unsigned int width);
-	void (*thumbScanline)(const FormatInfo &info, void *output,
-			      const void *input, unsigned int width,
-			      unsigned int stride);
-};
-
-struct Matrix3d {
-	Matrix3d()
-	{
-	}
-
-	Matrix3d(float m0, float m1, float m2,
-		 float m3, float m4, float m5,
-		 float m6, float m7, float m8)
-	{
-		m[0] = m0, m[1] = m1, m[2] = m2;
-		m[3] = m3, m[4] = m4, m[5] = m5;
-		m[6] = m6, m[7] = m7, m[8] = m8;
-	}
-
-	Matrix3d(const Span<const float> &span)
-		: Matrix3d(span[0], span[1], span[2],
-			   span[3], span[4], span[5],
-			   span[6], span[7], span[8])
-	{
-	}
-
-	static Matrix3d diag(float diag0, float diag1, float diag2)
-	{
-		return Matrix3d(diag0, 0, 0, 0, diag1, 0, 0, 0, diag2);
-	}
-
-	static Matrix3d identity()
-	{
-		return Matrix3d(1, 0, 0, 0, 1, 0, 0, 0, 1);
-	}
-
-	Matrix3d transpose() const
-	{
-		return { m[0], m[3], m[6], m[1], m[4], m[7], m[2], m[5], m[8] };
-	}
-
-	Matrix3d cofactors() const
-	{
-		return { m[4] * m[8] - m[5] * m[7],
-			 -(m[3] * m[8] - m[5] * m[6]),
-			 m[3] * m[7] - m[4] * m[6],
-			 -(m[1] * m[8] - m[2] * m[7]),
-			 m[0] * m[8] - m[2] * m[6],
-			 -(m[0] * m[7] - m[1] * m[6]),
-			 m[1] * m[5] - m[2] * m[4],
-			 -(m[0] * m[5] - m[2] * m[3]),
-			 m[0] * m[4] - m[1] * m[3] };
-	}
-
-	Matrix3d adjugate() const
-	{
-		return cofactors().transpose();
-	}
-
-	float determinant() const
-	{
-		return m[0] * (m[4] * m[8] - m[5] * m[7]) -
-		       m[1] * (m[3] * m[8] - m[5] * m[6]) +
-		       m[2] * (m[3] * m[7] - m[4] * m[6]);
-	}
-
-	Matrix3d inverse() const
-	{
-		return adjugate() * (1.0 / determinant());
-	}
-
-	Matrix3d operator*(const Matrix3d &other) const
-	{
-		Matrix3d result;
-		for (unsigned int i = 0; i < 3; i++) {
-			for (unsigned int j = 0; j < 3; j++) {
-				result.m[i * 3 + j] =
-					m[i * 3 + 0] * other.m[0 + j] +
-					m[i * 3 + 1] * other.m[3 + j] +
-					m[i * 3 + 2] * other.m[6 + j];
-			}
-		}
-		return result;
-	}
-
-	Matrix3d operator*(float f) const
-	{
-		Matrix3d result;
-		for (unsigned int i = 0; i < 9; i++)
-			result.m[i] = m[i] * f;
-		return result;
-	}
-
-	float m[9];
-};
-
-void packScanlineSBGGR8(void *output, const void *input, unsigned int width)
-{
-	const uint8_t *in = static_cast<const uint8_t *>(input);
-	uint8_t *out = static_cast<uint8_t *>(output);
-
-	std::copy(in, in + width, out);
-}
-
-void packScanlineSBGGR10P(void *output, const void *input, unsigned int width)
-{
-	const uint8_t *in = static_cast<const uint8_t *>(input);
-	uint8_t *out = static_cast<uint8_t *>(output);
-
-	/* \todo Can this be made more efficient? */
-	for (unsigned int x = 0; x < width; x += 4) {
-		*out++ = in[0];
-		*out++ = (in[4] & 0x03) << 6 | in[1] >> 2;
-		*out++ = (in[1] & 0x03) << 6 | (in[4] & 0x0c) << 2 | in[2] >> 4;
-		*out++ = (in[2] & 0x0f) << 4 | (in[4] & 0x30) >> 2 | in[3] >> 6;
-		*out++ = (in[3] & 0x3f) << 2 | (in[4] & 0xc0) >> 6;
-		in += 5;
-	}
-}
-
-void packScanlineSBGGR12P(void *output, const void *input, unsigned int width)
-{
-	const uint8_t *in = static_cast<const uint8_t *>(input);
-	uint8_t *out = static_cast<uint8_t *>(output);
-
-	/* \todo Can this be made more efficient? */
-	for (unsigned int i = 0; i < width; i += 2) {
-		*out++ = in[0];
-		*out++ = (in[2] & 0x0f) << 4 | in[1] >> 4;
-		*out++ = (in[1] & 0x0f) << 4 | in[2] >> 4;
-		in += 3;
-	}
-}
-
-void thumbScanlineSBGGRxxP(const FormatInfo &info, void *output,
-			   const void *input, unsigned int width,
-			   unsigned int stride)
-{
-	const uint8_t *in = static_cast<const uint8_t *>(input);
-	uint8_t *out = static_cast<uint8_t *>(output);
-
-	/* Number of bytes corresponding to 16 pixels. */
-	unsigned int skip = info.bitsPerSample * 16 / 8;
-
-	for (unsigned int x = 0; x < width; x++) {
-		uint8_t value = (in[0] + in[1] + in[stride] + in[stride + 1]) >> 2;
-		*out++ = value;
-		*out++ = value;
-		*out++ = value;
-		in += skip;
-	}
-}
-
-void packScanlineIPU3(void *output, const void *input, unsigned int width)
-{
-	const uint8_t *in = static_cast<const uint8_t *>(input);
-	uint16_t *out = static_cast<uint16_t *>(output);
-
-	/*
-	 * Upscale the 10-bit format to 16-bit as it's not trivial to pack it
-	 * as 10-bit without gaps.
-	 *
-	 * \todo Improve packing to keep the 10-bit sample size.
-	 */
-	unsigned int x = 0;
-	while (true) {
-		for (unsigned int i = 0; i < 6; i++) {
-			*out++ = (in[1] & 0x03) << 14 | (in[0] & 0xff) << 6;
-			if (++x >= width)
-				return;
-
-			*out++ = (in[2] & 0x0f) << 12 | (in[1] & 0xfc) << 4;
-			if (++x >= width)
-				return;
-
-			*out++ = (in[3] & 0x3f) << 10 | (in[2] & 0xf0) << 2;
-			if (++x >= width)
-				return;
-
-			*out++ = (in[4] & 0xff) <<  8 | (in[3] & 0xc0) << 0;
-			if (++x >= width)
-				return;
-
-			in += 5;
-		}
-
-		*out++ = (in[1] & 0x03) << 14 | (in[0] & 0xff) << 6;
-		if (++x >= width)
-			return;
-
-		in += 2;
-	}
-}
-
-void thumbScanlineIPU3([[maybe_unused]] const FormatInfo &info, void *output,
-		       const void *input, unsigned int width,
-		       unsigned int stride)
-{
-	uint8_t *out = static_cast<uint8_t *>(output);
-
-	for (unsigned int x = 0; x < width; x++) {
-		unsigned int pixel = x * 16;
-		unsigned int block = pixel / 25;
-		unsigned int pixelInBlock = pixel - block * 25;
-
-		/*
-		 * If the pixel is the last in the block cheat a little and
-		 * move one pixel backward to avoid reading between two blocks
-		 * and having to deal with the padding bits.
-		 */
-		if (pixelInBlock == 24)
-			pixelInBlock--;
-
-		const uint8_t *in = static_cast<const uint8_t *>(input)
-				  + block * 32 + (pixelInBlock / 4) * 5;
-
-		uint16_t val1, val2, val3, val4;
-		switch (pixelInBlock % 4) {
-		case 0:
-			val1 = (in[1] & 0x03) << 14 | (in[0] & 0xff) << 6;
-			val2 = (in[2] & 0x0f) << 12 | (in[1] & 0xfc) << 4;
-			val3 = (in[stride + 1] & 0x03) << 14 | (in[stride + 0] & 0xff) << 6;
-			val4 = (in[stride + 2] & 0x0f) << 12 | (in[stride + 1] & 0xfc) << 4;
-			break;
-		case 1:
-			val1 = (in[2] & 0x0f) << 12 | (in[1] & 0xfc) << 4;
-			val2 = (in[3] & 0x3f) << 10 | (in[2] & 0xf0) << 2;
-			val3 = (in[stride + 2] & 0x0f) << 12 | (in[stride + 1] & 0xfc) << 4;
-			val4 = (in[stride + 3] & 0x3f) << 10 | (in[stride + 2] & 0xf0) << 2;
-			break;
-		case 2:
-			val1 = (in[3] & 0x3f) << 10 | (in[2] & 0xf0) << 2;
-			val2 = (in[4] & 0xff) <<  8 | (in[3] & 0xc0) << 0;
-			val3 = (in[stride + 3] & 0x3f) << 10 | (in[stride + 2] & 0xf0) << 2;
-			val4 = (in[stride + 4] & 0xff) <<  8 | (in[stride + 3] & 0xc0) << 0;
-			break;
-		case 3:
-			val1 = (in[4] & 0xff) <<  8 | (in[3] & 0xc0) << 0;
-			val2 = (in[6] & 0x03) << 14 | (in[5] & 0xff) << 6;
-			val3 = (in[stride + 4] & 0xff) <<  8 | (in[stride + 3] & 0xc0) << 0;
-			val4 = (in[stride + 6] & 0x03) << 14 | (in[stride + 5] & 0xff) << 6;
-			break;
-		}
-
-		uint8_t value = (val1 + val2 + val3 + val4) >> 10;
-		*out++ = value;
-		*out++ = value;
-		*out++ = value;
-	}
-}
-
-static const std::map<PixelFormat, FormatInfo> formatInfo = {
-	{ formats::SBGGR8, {
-		.bitsPerSample = 8,
-		.pattern = { CFAPatternBlue, CFAPatternGreen, CFAPatternGreen, CFAPatternRed },
-		.packScanline = packScanlineSBGGR8,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SGBRG8, {
-		.bitsPerSample = 8,
-		.pattern = { CFAPatternGreen, CFAPatternBlue, CFAPatternRed, CFAPatternGreen },
-		.packScanline = packScanlineSBGGR8,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SGRBG8, {
-		.bitsPerSample = 8,
-		.pattern = { CFAPatternGreen, CFAPatternRed, CFAPatternBlue, CFAPatternGreen },
-		.packScanline = packScanlineSBGGR8,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SRGGB8, {
-		.bitsPerSample = 8,
-		.pattern = { CFAPatternRed, CFAPatternGreen, CFAPatternGreen, CFAPatternBlue },
-		.packScanline = packScanlineSBGGR8,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SBGGR10_CSI2P, {
-		.bitsPerSample = 10,
-		.pattern = { CFAPatternBlue, CFAPatternGreen, CFAPatternGreen, CFAPatternRed },
-		.packScanline = packScanlineSBGGR10P,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SGBRG10_CSI2P, {
-		.bitsPerSample = 10,
-		.pattern = { CFAPatternGreen, CFAPatternBlue, CFAPatternRed, CFAPatternGreen },
-		.packScanline = packScanlineSBGGR10P,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SGRBG10_CSI2P, {
-		.bitsPerSample = 10,
-		.pattern = { CFAPatternGreen, CFAPatternRed, CFAPatternBlue, CFAPatternGreen },
-		.packScanline = packScanlineSBGGR10P,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SRGGB10_CSI2P, {
-		.bitsPerSample = 10,
-		.pattern = { CFAPatternRed, CFAPatternGreen, CFAPatternGreen, CFAPatternBlue },
-		.packScanline = packScanlineSBGGR10P,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SBGGR12_CSI2P, {
-		.bitsPerSample = 12,
-		.pattern = { CFAPatternBlue, CFAPatternGreen, CFAPatternGreen, CFAPatternRed },
-		.packScanline = packScanlineSBGGR12P,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SGBRG12_CSI2P, {
-		.bitsPerSample = 12,
-		.pattern = { CFAPatternGreen, CFAPatternBlue, CFAPatternRed, CFAPatternGreen },
-		.packScanline = packScanlineSBGGR12P,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SGRBG12_CSI2P, {
-		.bitsPerSample = 12,
-		.pattern = { CFAPatternGreen, CFAPatternRed, CFAPatternBlue, CFAPatternGreen },
-		.packScanline = packScanlineSBGGR12P,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SRGGB12_CSI2P, {
-		.bitsPerSample = 12,
-		.pattern = { CFAPatternRed, CFAPatternGreen, CFAPatternGreen, CFAPatternBlue },
-		.packScanline = packScanlineSBGGR12P,
-		.thumbScanline = thumbScanlineSBGGRxxP,
-	} },
-	{ formats::SBGGR10_IPU3, {
-		.bitsPerSample = 16,
-		.pattern = { CFAPatternBlue, CFAPatternGreen, CFAPatternGreen, CFAPatternRed },
-		.packScanline = packScanlineIPU3,
-		.thumbScanline = thumbScanlineIPU3,
-	} },
-	{ formats::SGBRG10_IPU3, {
-		.bitsPerSample = 16,
-		.pattern = { CFAPatternGreen, CFAPatternBlue, CFAPatternRed, CFAPatternGreen },
-		.packScanline = packScanlineIPU3,
-		.thumbScanline = thumbScanlineIPU3,
-	} },
-	{ formats::SGRBG10_IPU3, {
-		.bitsPerSample = 16,
-		.pattern = { CFAPatternGreen, CFAPatternRed, CFAPatternBlue, CFAPatternGreen },
-		.packScanline = packScanlineIPU3,
-		.thumbScanline = thumbScanlineIPU3,
-	} },
-	{ formats::SRGGB10_IPU3, {
-		.bitsPerSample = 16,
-		.pattern = { CFAPatternRed, CFAPatternGreen, CFAPatternGreen, CFAPatternBlue },
-		.packScanline = packScanlineIPU3,
-		.thumbScanline = thumbScanlineIPU3,
-	} },
-};
-
-int DNGWriter::write(const char *filename, const Camera *camera,
-		     const StreamConfiguration &config,
-		     const ControlList &metadata,
-		     [[maybe_unused]] const FrameBuffer *buffer,
-		     const void *data)
-{
-	const ControlList &cameraProperties = camera->properties();
-
-	const auto it = formatInfo.find(config.pixelFormat);
-	if (it == formatInfo.cend()) {
-		std::cerr << "Unsupported pixel format" << std::endl;
-		return -EINVAL;
-	}
-	const FormatInfo *info = &it->second;
-
-	TIFF *tif = TIFFOpen(filename, "w");
-	if (!tif) {
-		std::cerr << "Failed to open tiff file" << std::endl;
-		return -EINVAL;
-	}
-
-	/*
-	 * Scanline buffer, has to be large enough to store both a RAW scanline
-	 * or a thumbnail scanline. The latter will always be much smaller than
-	 * the former as we downscale by 16 in both directions.
-	 */
-	uint8_t scanline[(config.size.width * info->bitsPerSample + 7) / 8];
-
-	toff_t rawIFDOffset = 0;
-	toff_t exifIFDOffset = 0;
-
-	/*
-	 * Start with a thumbnail in IFD 0 for compatibility with TIFF baseline
-	 * readers, as required by the TIFF/EP specification. Tags that apply to
-	 * the whole file are stored here.
-	 */
-	const uint8_t version[] = { 1, 2, 0, 0 };
-
-	TIFFSetField(tif, TIFFTAG_DNGVERSION, version);
-	TIFFSetField(tif, TIFFTAG_DNGBACKWARDVERSION, version);
-	TIFFSetField(tif, TIFFTAG_FILLORDER, FILLORDER_MSB2LSB);
-	TIFFSetField(tif, TIFFTAG_MAKE, "libcamera");
-
-	const auto &model = cameraProperties.get(properties::Model);
-	if (model) {
-		TIFFSetField(tif, TIFFTAG_MODEL, model->c_str());
-		/* \todo set TIFFTAG_UNIQUECAMERAMODEL. */
-	}
-
-	TIFFSetField(tif, TIFFTAG_SOFTWARE, "qcam");
-	TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
-
-	/*
-	 * Thumbnail-specific tags. The thumbnail is stored as an RGB image
-	 * with 1/16 of the raw image resolution. Greyscale would save space,
-	 * but doesn't seem well supported by RawTherapee.
-	 */
-	TIFFSetField(tif, TIFFTAG_SUBFILETYPE, FILETYPE_REDUCEDIMAGE);
-	TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, config.size.width / 16);
-	TIFFSetField(tif, TIFFTAG_IMAGELENGTH, config.size.height / 16);
-	TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
-	TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
-	TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
-	TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 3);
-	TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
-	TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
-
-	/*
-	 * Fill in some reasonable colour information in the DNG. We supply
-	 * the "neutral" colour values which determine the white balance, and the
-	 * "ColorMatrix1" which converts XYZ to (un-white-balanced) camera RGB.
-	 * Note that this is not a "proper" colour calibration for the DNG,
-	 * nonetheless, many tools should be able to render the colours better.
-	 */
-	float neutral[3] = { 1, 1, 1 };
-	Matrix3d wbGain = Matrix3d::identity();
-	/* From http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html */
-	const Matrix3d rgb2xyz(0.4124564, 0.3575761, 0.1804375,
-			       0.2126729, 0.7151522, 0.0721750,
-			       0.0193339, 0.1191920, 0.9503041);
-	Matrix3d ccm = Matrix3d::identity();
-	/*
-	 * Pick a reasonable number eps to protect against singularities. It
-	 * should be comfortably larger than the point at which we run into
-	 * numerical trouble, yet smaller than any plausible gain that we might
-	 * apply to a colour, either explicitly or as part of the colour matrix.
-	 */
-	const double eps = 1e-2;
-
-	const auto &colourGains = metadata.get(controls::ColourGains);
-	if (colourGains) {
-		if ((*colourGains)[0] > eps && (*colourGains)[1] > eps) {
-			wbGain = Matrix3d::diag((*colourGains)[0], 1, (*colourGains)[1]);
-			neutral[0] = 1.0 / (*colourGains)[0]; /* red */
-			neutral[2] = 1.0 / (*colourGains)[1]; /* blue */
-		}
-	}
-
-	const auto &ccmControl = metadata.get(controls::ColourCorrectionMatrix);
-	if (ccmControl) {
-		Matrix3d ccmSupplied(*ccmControl);
-		if (ccmSupplied.determinant() > eps)
-			ccm = ccmSupplied;
-	}
-
-	/*
-	 * rgb2xyz is known to be invertible, and we've ensured above that both
-	 * the ccm and wbGain matrices are non-singular, so the product of all
-	 * three is guaranteed to be invertible too.
-	 */
-	Matrix3d colorMatrix1 = (rgb2xyz * ccm * wbGain).inverse();
-
-	TIFFSetField(tif, TIFFTAG_COLORMATRIX1, 9, colorMatrix1.m);
-	TIFFSetField(tif, TIFFTAG_ASSHOTNEUTRAL, 3, neutral);
-
-	/*
-	 * Reserve space for the SubIFD and ExifIFD tags, pointing to the IFD
-	 * for the raw image and EXIF data respectively. The real offsets will
-	 * be set later.
-	 */
-	TIFFSetField(tif, TIFFTAG_SUBIFD, 1, &rawIFDOffset);
-	TIFFSetField(tif, TIFFTAG_EXIFIFD, exifIFDOffset);
-
-	/* Write the thumbnail. */
-	const uint8_t *row = static_cast<const uint8_t *>(data);
-	for (unsigned int y = 0; y < config.size.height / 16; y++) {
-		info->thumbScanline(*info, &scanline, row,
-				    config.size.width / 16, config.stride);
-
-		if (TIFFWriteScanline(tif, &scanline, y, 0) != 1) {
-			std::cerr << "Failed to write thumbnail scanline"
-				  << std::endl;
-			TIFFClose(tif);
-			return -EINVAL;
-		}
-
-		row += config.stride * 16;
-	}
-
-	TIFFWriteDirectory(tif);
-
-	/* Create a new IFD for the RAW image. */
-	const uint16_t cfaRepeatPatternDim[] = { 2, 2 };
-	const uint8_t cfaPlaneColor[] = {
-		CFAPatternRed,
-		CFAPatternGreen,
-		CFAPatternBlue
-	};
-
-	TIFFSetField(tif, TIFFTAG_SUBFILETYPE, 0);
-	TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, config.size.width);
-	TIFFSetField(tif, TIFFTAG_IMAGELENGTH, config.size.height);
-	TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, info->bitsPerSample);
-	TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
-	TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_CFA);
-	TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1);
-	TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
-	TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
-	TIFFSetField(tif, TIFFTAG_CFAREPEATPATTERNDIM, cfaRepeatPatternDim);
-	if (TIFFLIB_VERSION < 20201219)
-		TIFFSetField(tif, TIFFTAG_CFAPATTERN, info->pattern);
-	else
-		TIFFSetField(tif, TIFFTAG_CFAPATTERN, 4, info->pattern);
-	TIFFSetField(tif, TIFFTAG_CFAPLANECOLOR, 3, cfaPlaneColor);
-	TIFFSetField(tif, TIFFTAG_CFALAYOUT, 1);
-
-	const uint16_t blackLevelRepeatDim[] = { 2, 2 };
-	float blackLevel[] = { 0.0f, 0.0f, 0.0f, 0.0f };
-	uint32_t whiteLevel = (1 << info->bitsPerSample) - 1;
-
-	const auto &blackLevels = metadata.get(controls::SensorBlackLevels);
-	if (blackLevels) {
-		Span<const int32_t, 4> levels = *blackLevels;
-
-		/*
-		 * The black levels control is specified in R, Gr, Gb, B order.
-		 * Map it to the TIFF tag that is specified in CFA pattern
-		 * order.
-		 */
-		unsigned int green = (info->pattern[0] == CFAPatternRed ||
-				      info->pattern[1] == CFAPatternRed)
-				   ? 0 : 1;
-
-		for (unsigned int i = 0; i < 4; ++i) {
-			unsigned int level;
-
-			switch (info->pattern[i]) {
-			case CFAPatternRed:
-				level = levels[0];
-				break;
-			case CFAPatternGreen:
-				level = levels[green + 1];
-				green = (green + 1) % 2;
-				break;
-			case CFAPatternBlue:
-			default:
-				level = levels[3];
-				break;
-			}
-
-			/* Map the 16-bit value to the bits per sample range. */
-			blackLevel[i] = level >> (16 - info->bitsPerSample);
-		}
-	}
-
-	TIFFSetField(tif, TIFFTAG_BLACKLEVELREPEATDIM, &blackLevelRepeatDim);
-	TIFFSetField(tif, TIFFTAG_BLACKLEVEL, 4, &blackLevel);
-	TIFFSetField(tif, TIFFTAG_WHITELEVEL, 1, &whiteLevel);
-
-	/* Write RAW content. */
-	row = static_cast<const uint8_t *>(data);
-	for (unsigned int y = 0; y < config.size.height; y++) {
-		info->packScanline(&scanline, row, config.size.width);
-
-		if (TIFFWriteScanline(tif, &scanline, y, 0) != 1) {
-			std::cerr << "Failed to write RAW scanline"
-				  << std::endl;
-			TIFFClose(tif);
-			return -EINVAL;
-		}
-
-		row += config.stride;
-	}
-
-	/* Checkpoint the IFD to retrieve its offset, and write it out. */
-	TIFFCheckpointDirectory(tif);
-	rawIFDOffset = TIFFCurrentDirOffset(tif);
-	TIFFWriteDirectory(tif);
-
-	/* Create a new IFD for the EXIF data and fill it. */
-	TIFFCreateEXIFDirectory(tif);
-
-	/* Store creation time. */
-	time_t rawtime;
-	struct tm *timeinfo;
-	char strTime[20];
-
-	time(&rawtime);
-	timeinfo = localtime(&rawtime);
-	strftime(strTime, 20, "%Y:%m:%d %H:%M:%S", timeinfo);
-
-	/*
-	 * \todo Handle timezone information by setting OffsetTimeOriginal and
-	 * OffsetTimeDigitized once libtiff catches up to the specification and
-	 * has EXIFTAG_ defines to handle them.
-	 */
-	TIFFSetField(tif, EXIFTAG_DATETIMEORIGINAL, strTime);
-	TIFFSetField(tif, EXIFTAG_DATETIMEDIGITIZED, strTime);
-
-	const auto &analogGain = metadata.get(controls::AnalogueGain);
-	if (analogGain) {
-		uint16_t iso = std::min(std::max(*analogGain * 100, 0.0f), 65535.0f);
-		TIFFSetField(tif, EXIFTAG_ISOSPEEDRATINGS, 1, &iso);
-	}
-
-	const auto &exposureTime = metadata.get(controls::ExposureTime);
-	if (exposureTime)
-		TIFFSetField(tif, EXIFTAG_EXPOSURETIME, *exposureTime / 1e6);
-
-	TIFFWriteCustomDirectory(tif, &exifIFDOffset);
-
-	/* Update the IFD offsets and close the file. */
-	TIFFSetDirectory(tif, 0);
-	TIFFSetField(tif, TIFFTAG_SUBIFD, 1, &rawIFDOffset);
-	TIFFSetField(tif, TIFFTAG_EXIFIFD, exifIFDOffset);
-	TIFFWriteDirectory(tif);
-
-	TIFFClose(tif);
-
-	return 0;
-}