Use libdng to write the output images

src/process_pipeline.c

@@ -9,18 +9,15 @@
 #include <assert.h>
 #include <gtk/gtk.h>
 #include <math.h>
-#include <tiffio.h>
 #ifndef SYSCONFDIR
 #include "config.h"
 #endif
 
 #include "dcp.h"
 #include "gl_util.h"
+#include "libdng.h"
 #include <sys/mman.h>
 
-#define TIFFTAG_FORWARDMATRIX1 50964
-#define TIFFTAG_FORWARDMATRIX2 50965
-
 static const float colormatrix_srgb[] = { 3.2409f,  -1.5373f, -0.4986f,
                                           -0.9692f, 1.8759f,  0.0415f,
                                           0.0556f,  -0.2039f, 1.0569f };
@@ -45,66 +42,6 @@ static char capture_fname[255];
 
 static GSettings *settings;
 
-static void
-register_custom_tiff_tags(TIFF *tif)
-{
-        static const TIFFFieldInfo custom_fields[] = {
-                { TIFFTAG_FORWARDMATRIX1,
-                  -1,
-                  -1,
-                  TIFF_SRATIONAL,
-                  FIELD_CUSTOM,
-                  1,
-                  1,
-                  "ForwardMatrix1" },
-                { TIFFTAG_FORWARDMATRIX2,
-                  -1,
-                  -1,
-                  TIFF_SRATIONAL,
-                  FIELD_CUSTOM,
-                  1,
-                  1,
-                  "ForwardMatrix2" },
-                { DCPTAG_PROFILE_TONE_CURVE,
-                  -1,
-                  -1,
-                  TIFF_FLOAT,
-                  FIELD_CUSTOM,
-                  1,
-                  1,
-                  "ProfileToneCurve" },
-                { DCPTAG_PROFILE_HUE_SAT_MAP_DIMS,
-                  -1,
-                  -1,
-                  TIFF_FLOAT,
-                  FIELD_CUSTOM,
-                  1,
-                  1,
-                  "ProfileHueSatMapDims" },
-                { DCPTAG_PROFILE_HUE_SAT_MAP_DATA_1,
-                  -1,
-                  -1,
-                  TIFF_FLOAT,
-                  FIELD_CUSTOM,
-                  1,
-                  1,
-                  "ProfileHueSatMapData1" },
-                { DCPTAG_PROFILE_HUE_SAT_MAP_DATA_2,
-                  -1,
-                  -1,
-                  TIFF_FLOAT,
-                  FIELD_CUSTOM,
-                  1,
-                  1,
-                  "ProfileHueSatMapData2" },
-        };
-
-        // Add missing dng fields
-        TIFFMergeFieldInfo(tif,
-                           custom_fields,
-                           sizeof(custom_fields) / sizeof(custom_fields[0]));
-}
-
 void
 mp_process_find_all_processors(GtkListStore *store)
 {
@@ -212,7 +149,7 @@ mp_process_find_processor(char *script)
 static void
 setup(MPPipeline *pipeline, const void *data)
 {
-        TIFFSetTagExtender(register_custom_tiff_tags);
+        libdng_init();
         settings = g_settings_new("org.postmarketos.Megapixels");
 }
 
@@ -554,20 +491,21 @@ process_image_for_capture(const uint8_t *image, int count)
         char fname[255];
         sprintf(fname, "%s/%d.dng", burst_dir, count);
 
-        TIFF *tif = TIFFOpen(fname, "w");
-        if (!tif) {
-                printf("Could not open tiff\n");
-        }
+        libdng_info dng = { 0 };
+        libdng_new(&dng);
+
+        libdng_set_mode_from_pixfmt(&dng, state_proc.mode->v4l_pixfmt);
+        libdng_set_make_model(&dng,
+                              state_proc.configuration->make,
+                              state_proc.configuration->model);
 
-        // Define TIFF thumbnail
-        TIFFSetField(tif, TIFFTAG_SUBFILETYPE, 1);
-        TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, state_proc.mode->width >> 4);
-        TIFFSetField(tif, TIFFTAG_IMAGELENGTH, state_proc.mode->height >> 4);
-        TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
-        TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
-        TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
-        TIFFSetField(tif, TIFFTAG_MAKE, state_proc.configuration->make);
-        TIFFSetField(tif, TIFFTAG_MODEL, state_proc.configuration->model);
+        libdng_write(&dng,
+                     fname,
+                     state_proc.mode->width,
+                     state_proc.mode->height,
+                     image,
+                     count);
+        libdng_free(&dng);
 
         uint16_t orientation;
         if (state_proc.device_rotation == 0) {
@@ -585,19 +523,7 @@ process_image_for_capture(const uint8_t *image, int count)
         }
         TIFFSetField(tif, TIFFTAG_ORIENTATION, orientation);
         TIFFSetField(tif, TIFFTAG_DATETIME, datetime);
-        TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 3);
-        TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
         TIFFSetField(tif, TIFFTAG_SOFTWARE, "Megapixels");
-        long sub_offset = 0;
-        TIFFSetField(tif, TIFFTAG_SUBIFD, 1, &sub_offset);
-        TIFFSetField(tif, TIFFTAG_DNGVERSION, "\001\001\0\0");
-        TIFFSetField(tif, TIFFTAG_DNGBACKWARDVERSION, "\001\0\0\0");
-        char uniquecameramodel[255];
-        sprintf(uniquecameramodel,
-                "%s %s",
-                state_proc.configuration->make,
-                state_proc.configuration->model);
-        TIFFSetField(tif, TIFFTAG_UNIQUECAMERAMODEL, uniquecameramodel);
 
         static float neutral[] = { 1.0f, 1.0f, 1.0f };
         neutral[0] = state_proc.red;
@@ -616,28 +542,6 @@ process_image_for_capture(const uint8_t *image, int count)
         }
         TIFFWriteDirectory(tif);
 
-        // Define main photo
-        TIFFSetField(tif, TIFFTAG_SUBFILETYPE, 0);
-        TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, state_proc.mode->width);
-        TIFFSetField(tif, TIFFTAG_IMAGELENGTH, state_proc.mode->height);
-        TIFFSetField(tif,
-                     TIFFTAG_BITSPERSAMPLE,
-                     libmegapixels_format_bits_per_pixel(state_proc.mode->format));
-        TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_CFA);
-        TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1);
-        TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
-        static const short cfapatterndim[] = { 2, 2 };
-        TIFFSetField(tif, TIFFTAG_CFAREPEATPATTERNDIM, cfapatterndim);
-#if (TIFFLIB_VERSION < 20201219) && !LIBTIFF_CFA_PATTERN
-        TIFFSetField(tif,
-                     TIFFTAG_CFAPATTERN,
-                     mp_pixel_format_cfa_pattern(mode.pixel_format));
-#else
-        TIFFSetField(tif,
-                     TIFFTAG_CFAPATTERN,
-                     4,
-                     libmegapixels_format_cfa_pattern(state_proc.mode->format));
-#endif
         printf("TIFF version %d\n", TIFFLIB_VERSION);
         int whitelevel =
                 (1 << libmegapixels_format_bits_per_pixel(state_proc.mode->format)) -