enhance translation for Exif.NikonAf2.AFAreaMode

Author: norbertwg

src/nikonmn_int.cpp

@@ -744,8 +744,8 @@ constexpr TagDetails nikonAfAreaMode[] = {
     {3, N_("Group Dynamic")}, {4, N_("Single Area (wide)")}, {5, N_("Dynamic Area (wide)")},
 };
 
-//! AF2 Area Mode
-constexpr TagDetails nikonAf2AreaMode[] = {
+//! AF2 Area Mode when Contrast Detect AF is off
+constexpr TagDetails nikonAf2AreaModeContrastDetectAfOff[] = {
     {0, N_("Single-point AF")},
     {1, N_("Dynamic-area AF")},
     {2, N_("Closest Subject")},
@@ -766,6 +766,12 @@ constexpr TagDetails nikonAf2AreaMode[] = {
     {17, N_("Group-area AF (VL)")},
 };
 
+//! AF2 Area Mode when Contrast Detect AF is on
+constexpr TagDetails nikonAf2AreaModeContrastDetectAfOn[] = {
+    {0, N_("Contrast AF")},      {1, N_("Normal-area AF")},      {2, N_("Wide-area AF")},
+    {3, N_("Face-priority AF")}, {4, N_("Subject-tracking AF")}, {5, N_("Pinpoint AF")},
+};
+
 //! AfPoint
 constexpr TagDetails nikonAfPoint[] = {
     {0, N_("Center")},      {1, N_("Top")},        {2, N_("Bottom")},      {3, N_("Mid-left")},
@@ -810,7 +816,7 @@ constexpr TagInfo Nikon3MakerNote::tagInfoAf21_[] = {
     {4, "ContrastDetectAF", N_("Contrast Detect AF"), N_("Contrast detect AF"), IfdId::nikonAf21Id,
      SectionId::makerTags, unsignedByte, 1, EXV_PRINT_TAG(nikonOffOn)},
     {5, "AFAreaMode", N_("AF Area Mode"), N_("AF area mode"), IfdId::nikonAf21Id, SectionId::makerTags, unsignedByte, 1,
-     EXV_PRINT_TAG(nikonAf2AreaMode)},
+     printAf2AreaMode},
     {6, "PhaseDetectAF", N_("Phase Detect AF"), N_("Phase detect AF"), IfdId::nikonAf21Id, SectionId::makerTags,
      unsignedByte, 1, EXV_PRINT_TAG(nikonPhaseDetectAF)},
     {7, "PrimaryAFPoint", N_("Primary AF Point"), N_("Primary AF point"), IfdId::nikonAf21Id, SectionId::makerTags,
@@ -1766,6 +1772,21 @@ std::ostream& Nikon3MakerNote::print0x0002(std::ostream& os, const Value& value,
   return os;
 }
 
+std::ostream& Nikon3MakerNote::printAf2AreaMode(std::ostream& os, const Value& value, const ExifData* metadata) {
+  int contrastDetectAF = 0;
+  if (metadata) {
+    auto pos = metadata->findKey(ExifKey("Exif.NikonAf2.ContrastDetectAF"));
+    if (pos != metadata->end() && pos->count() != 0) {
+      contrastDetectAF = pos->toUint32();
+    }
+  }
+
+  if (contrastDetectAF == 0)
+    return EXV_PRINT_TAG(nikonAf2AreaModeContrastDetectAfOff)(os, value, nullptr);
+  else
+    return EXV_PRINT_TAG(nikonAf2AreaModeContrastDetectAfOn)(os, value, nullptr);
+}
+
 std::ostream& Nikon3MakerNote::print0x0007(std::ostream& os, const Value& value, const ExifData*) {
   std::string focus = value.toString();
   if (focus == "AF-C  ")

src/nikonmn_int.hpp

@@ -144,6 +144,8 @@ class Nikon3MakerNote {
   //@{
   //! Print ISO setting
   static std::ostream& print0x0002(std::ostream& os, const Value& value, const ExifData*);
+  //! Print AF2 Area Mode
+  static std::ostream& printAf2AreaMode(std::ostream& os, const Value& value, const ExifData* metadata);
   //! Print autofocus mode
   static std::ostream& print0x0007(std::ostream& os, const Value& value, const ExifData*);
   //! Print lens type

test/data/test_reference_files/Tokina_AT-X_14-20_F2_PRO_DX.exv.out

@@ -149,7 +149,7 @@ Exif.NikonMe.MultiExposureAutoGain           Long        1  0  Off
 Exif.Nikon3.HighISONoiseReduction            Short       1  0  Off
 Exif.NikonAf2.Version                        Undefined   4  48 49 48 48  1.00
 Exif.NikonAf2.ContrastDetectAF               Byte        1  1  On
-Exif.NikonAf2.AFAreaMode                     Byte        1  2  Closest Subject
+Exif.NikonAf2.AFAreaMode                     Byte        1  2  Wide-area AF
 Exif.NikonAf2.PhaseDetectAF                  Byte        1  0  Off
 Exif.NikonAf2.PrimaryAFPoint                 Byte        1  0  0
 Exif.NikonAf2.AFPointsUsed                   Byte        7  0 0 0 0 0 0 0  0 0 0 0 0 0 0