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+/* exif_nikon.c
+
+Copyright (C) 2012 Dennis Real.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies of the Software and its documentation and acknowledgment shall be
+given in the documentation and software packages that this Software was
+used.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+
+#ifdef HAVE_LIBEXIF
+
+#include <stdio.h>
+#include <string.h>
+#include <libexif/exif-data.h>
+
+#include "feh.h"
+#include "debug.h"
+#include "exif.h"
+#include "exif_nikon.h"
+
+
+/* Flash control mode */
+/* http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html#FlashControlMode */
+#define EXN_FLASH_CONTROL_MODES_MAX 9
+char *EXN_NikonFlashControlModeValues[EXN_FLASH_CONTROL_MODES_MAX] = {"Off",
+ "iTTL-BL", "iTTL", "Auto Aperture",
+ "Automatic", "GN (distance priority)",
+ "Manual", "Repeating Flash",
+ "N/A" /* "N/A" is not a nikon setting */
+ };
+
+#define EXN_FLASH_CONTROL_MODE_MASK 0x7F
+
+
+/* AFInfo2 */
+/* http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/Nikon.html#AFInfo2 */
+#define EXN_CONTRAST_DETECT_AF_MAX 2
+char *EXN_NikonContrastDetectAF[EXN_CONTRAST_DETECT_AF_MAX] = {"Off", "On"};
+
+/* AFArea Mode for ContrastDetectAF Off */
+#define EXN_AF_AREA_MODE_P_MAX 13
+char *EXN_NikonAFAreaModePhase[EXN_AF_AREA_MODE_P_MAX] = {
+ "Single Area", "Dynamic Area", "Dynamic Area (closest subject)",
+ "Group Dynamic ", "Dynamic Area (9 points) ", "Dynamic Area (21 points)",
+ "Dynamic Area (51 points) ", "Dynamic Area (51 points, 3D-tracking)",
+ "Auto-area", "Dynamic Area (3D-tracking)", "Single Area (wide)",
+ "Dynamic Area (wide)", "Dynamic Area (wide, 3D-tracking)"};
+
+/* AFArea Mode for ContrastDetectAF On */
+#define EXN_AF_AREA_MODE_C_MAX 5
+char *EXN_NikonAFAreaModeContr[EXN_AF_AREA_MODE_C_MAX] = {
+ "Contrast-detect",
+ "Contrast-detect (normal area)",
+ "Contrast-detect (wide area)",
+ "Contrast-detect (face priority)",
+ "Contrast-detect (subject tracking)"};
+
+#define EXN_PHASE_DETECT_AF_MAX 4
+char *EXN_NikonPhaseDetectAF[EXN_PHASE_DETECT_AF_MAX] = {"Off", "On (51-point)",
+ "On (11-point)", "On (39-point)"};
+
+/* PrimaryAFPoint and AFPointsUsed only valid with PhaseDetectAF == On */
+
+#define EXN_PRIM_AF_PT_51_MAX 52
+char * EXN_Prim_AF_Pt_51[EXN_PRIM_AF_PT_51_MAX] = {"(none)", "C6 (Center)", "B6", "A5",
+ "D6", "E5", "C7", "B7", "A6", "D7", "E6", "C5", "B5", "A4", "D5", "E4", "C8", "B8",
+ "A7", "D8", "E7", "C9", "B9", "A8", "D9", "E8", "C10", "B10", "A9", "D10", "E9",
+ "C11", "B11", "D11", "C4", "B4", "A3", "D4", "E3", "C3", "B3", "A2", "D3", "E2",
+ "C2", "B2", "A1", "D2", "E1", "C1", "B1", "D1"};
+
+#define EXN_PRIM_AF_PT_11_MAX 12
+char * EXN_Prim_AF_Pt_11[EXN_PRIM_AF_PT_11_MAX] = {"(none)", "Center", "Top", "Bottom",
+ "Mid-left", "Upper-left", "Lower-left", "Far Left", "Mid-right", "Upper-right",
+ "Lower-right", "Far Right"};
+
+#define EXN_PRIM_AF_PT_39_MAX 40
+char * EXN_Prim_AF_Pt_39[EXN_PRIM_AF_PT_39_MAX] = {"(none)", "C6 (Center)", "B6", "A2",
+ "D6", "E2", "C7", "B7", "A3", "D7", "E3", "C5", "B5", "A1", "D5", "E1", "C8", "B8",
+ "D8", "C9", "B9", "D9", "C10", "B10", "D10", "C11", "B11", "D11", "C4", "B4", "D4",
+ "C3", "B3", "D3", "C2", "B2", "D2", "C1", "B1", "D1"};
+
+
+static void exn_get_prim_af_pt(unsigned int phasedetectaf,
+ unsigned int primafpt,
+ char * buffer,
+ unsigned int maxsize);
+
+
+
+
+static void exn_get_prim_af_pt(unsigned int phasedetectaf,
+ unsigned int primafpt,
+ char * buffer,
+ unsigned int maxsize)
+{
+
+ switch(phasedetectaf)
+ {
+ case 0:
+ {
+ /* phasedetect not used. should not happen */
+ snprintf(buffer, maxsize, "FAIL");
+ return;
+ }
+ break;
+ case 1:
+ {
+ /* 51 pt */
+ if ( primafpt < EXN_PRIM_AF_PT_51_MAX )
+ {
+ snprintf(buffer, maxsize, "%s", EXN_Prim_AF_Pt_51[primafpt]);
+ }
+ return;
+ }
+ break;
+ case 2:
+ {
+ /* 11 pt */
+ if ( primafpt < EXN_PRIM_AF_PT_11_MAX )
+ {
+ snprintf(buffer, maxsize, "%s", EXN_Prim_AF_Pt_11[primafpt]);
+ }
+ return;
+ }
+ break;
+ case 3:
+ {
+ /* 39 pt */
+ if ( primafpt < EXN_PRIM_AF_PT_39_MAX )
+ {
+ snprintf(buffer, maxsize, "%s", EXN_Prim_AF_Pt_39[primafpt]);
+ }
+ return;
+ }
+ break;
+ default:
+ {
+ snprintf(buffer, maxsize, "?");
+ return;
+ }
+ break;
+
+ }
+
+}
+
+
+
+/* get interesting nikon maker note tags in readable form */
+void exn_get_mnote_nikon_tags(ExifData *ed, char * buffer, unsigned int maxsize)
+{
+ char buf[EXIF_STD_BUF_LEN];
+ unsigned int exn_fcm = (EXN_FLASH_CONTROL_MODES_MAX-1); /* default to N/A */
+ unsigned int version = 0;
+ unsigned int length = 0;
+ unsigned int contrastdetectaf = 0;
+ unsigned int afareamode = 0;
+ unsigned int phasedetectaf = 0;
+ unsigned int primaryafpoint = 0;
+
+ buf[0] = '\0';
+ exif_get_tag(ed, EXIF_IFD_EXIF, EXIF_TAG_FLASH, buf, sizeof(buf));
+ exif_trim_spaces(buf);
+
+ if ( !(strcmp("Flash: Flash did not fire\n", buf) == 0) )
+ {
+ /* show extended flash info if flash was fired */
+
+ /* Flash Setting */
+ exif_get_mnote_tag(ed, 8, buffer + strlen(buffer), maxsize - strlen(buffer));
+ /* Flash Mode */
+ exif_get_mnote_tag(ed, 9, buffer + strlen(buffer), maxsize - strlen(buffer));
+ /* flash exposure bracket value */
+ exif_get_mnote_tag(ed, 24, buffer + strlen(buffer), maxsize - strlen(buffer));
+ /* Flash used */
+ exif_get_mnote_tag(ed, 135, buffer + strlen(buffer), maxsize - strlen(buffer));
+
+ /* Flash info: control mode. */
+ /* libexif does not support flash info 168 yet. so we have to parse the debug data :-( */
+ buf[0] = '\0';
+ exif_get_mnote_tag(ed, 168, buf, sizeof(buf));
+ sscanf(buf, "(null): %u bytes unknown data: 303130%02X%*10s%02X", &length, &version, &exn_fcm);
+ exn_fcm = exn_fcm & EXN_FLASH_CONTROL_MODE_MASK;
+
+ if ( (exn_fcm < EXN_FLASH_CONTROL_MODES_MAX)
+ && ( ((length == 22) && (version == '3')) /* Nikon FlashInfo0103 */
+ || ((length == 22) && (version == '4')) /* Nikon FlashInfo0104 */
+ || ((length == 21) && (version == '2')) /* Nikon FlashInfo0102 */
+ || ((length == 19) && (version == '0')) /* Nikon FlashInfo0100 */
+ )
+ )
+ {
+ snprintf(buffer + strlen(buffer), maxsize - strlen(buffer), "NikonFlashControlMode: %s\n",
+ EXN_NikonFlashControlModeValues[exn_fcm]);
+ }
+ }
+
+ /* Lens */
+ exif_get_mnote_tag(ed, 132, buffer + strlen(buffer), maxsize - strlen(buffer));
+ /* Digital Vari-Program */
+ exif_get_mnote_tag(ed, 171, buffer + strlen(buffer), maxsize - strlen(buffer));
+
+ /* AFInfo2 */
+ /* libexif does not support AFInfo2 183 yet. so we have to parse the debug data :-( */
+ buf[0] = '\0';
+ exif_get_mnote_tag(ed, 183, buf, sizeof(buf));
+ sscanf(buf, "(null): %u bytes unknown data: 303130%02X%02X%02X%02X%02X", &length, &version,
+ &contrastdetectaf,
+ &afareamode,
+ &phasedetectaf,
+ &primaryafpoint
+ );
+
+
+ if ( ((length == 30) && (version == '0'))
+ && (contrastdetectaf < EXN_CONTRAST_DETECT_AF_MAX)
+ && (phasedetectaf < EXN_PHASE_DETECT_AF_MAX)
+
+ )
+ {
+ if ( (contrastdetectaf != 0) && (afareamode < EXN_AF_AREA_MODE_C_MAX) )
+ {
+ /* Contrast AF (live view) */
+ snprintf(buffer + strlen(buffer), maxsize - strlen(buffer),
+ "ContrastDetectAF: %s; AFAreaMode: %s\n",
+ EXN_NikonContrastDetectAF[contrastdetectaf],
+ EXN_NikonAFAreaModeContr[afareamode]);
+
+ }
+ else if ( (phasedetectaf != 0) && (afareamode < EXN_AF_AREA_MODE_P_MAX) )
+ {
+ /* Phase AF */
+ buf[0] = '\0';
+ exn_get_prim_af_pt(phasedetectaf, primaryafpoint, buf, EXIF_STD_BUF_LEN);
+
+ snprintf(buffer + strlen(buffer), maxsize - strlen(buffer),
+ "PhaseDetectAF: %s; AreaMode: %s; PrimaryAFPoint: %s\n",
+ EXN_NikonPhaseDetectAF[phasedetectaf],
+ EXN_NikonAFAreaModePhase[afareamode],
+ buf
+ );
+ }
+
+ }
+
+ return;
+}
+
+#endif
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