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-rw-r--r--src/qcam/dng_writer.cpp621
1 files changed, 0 insertions, 621 deletions
diff --git a/src/qcam/dng_writer.cpp b/src/qcam/dng_writer.cpp
deleted file mode 100644
index 6dd7d0f4..00000000
--- a/src/qcam/dng_writer.cpp
+++ /dev/null
@@ -1,621 +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 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::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;
-}