1/* mnote-canon-entry.c
2 *
3 * Copyright (c) 2002 Lutz Mueller <lutz@users.sourceforge.net>
4 * Copyright (c) 2003 Matthieu Castet <mat-c@users.sourceforge.net>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA  02110-1301  USA.
20 */
21
22#include "config.h"
23#include "mnote-canon-entry.h"
24
25#include <stdio.h>
26#include <stdlib.h>
27#include <string.h>
28#include <math.h>
29
30#include <libexif/exif-format.h>
31#include <libexif/exif-utils.h>
32#include <libexif/i18n.h>
33
34/* #define DEBUG */
35
36#define CF(format,target,v,maxlen)                              \
37{                                                               \
38        if (format != target) {                                 \
39                snprintf (v, maxlen,                            \
40                        _("Invalid format '%s', "               \
41                        "expected '%s'."),                      \
42                        exif_format_get_name (format),          \
43                        exif_format_get_name (target));         \
44                break;                                          \
45        }                                                       \
46}
47
48#define CC(number,target,v,maxlen)                                      \
49{                                                                       \
50        if (number != target) {                                         \
51                snprintf (v, maxlen,                                    \
52                        _("Invalid number of components (%i, "          \
53                        "expected %i)."), (int) number, (int) target);  \
54                break;                                                  \
55        }                                                               \
56}
57#define CC2(number,t1,t2,v,maxlen)                                      \
58{                                                                       \
59	if ((number != t1) && (number != t2)) {                         \
60		snprintf (v, maxlen,                                    \
61			_("Invalid number of components (%i, "          \
62			"expected %i or %i)."), (int) number,		\
63			(int) t1, (int) t2);  				\
64		break;                                                  \
65	}                                                               \
66}
67
68#define UNDEFINED 0xFF
69
70static const struct canon_entry_table_t {
71  unsigned int subtag;
72  ExifShort value;
73  const char *name;
74} entries_settings_1 [] = {
75#ifndef NO_VERBOSE_TAG_DATA
76  { 0,  1, N_("Macro")},
77  { 0,  2, N_("Normal")},
78  { 2,  1, N_("Economy")},
79  { 2,  2, N_("Normal")},
80  { 2,  3, N_("Fine")},
81  { 2,  4, N_("RAW")},
82  { 2,  5, N_("Superfine")},
83  { 3,  0, N_("Off")},
84  { 3,  1, N_("Auto")},
85  { 3,  2, N_("On")},
86  { 3,  3, N_("Red-eye reduction")},
87  { 3,  4, N_("Slow synchro")},
88  { 3,  5, N_("Auto, red-eye reduction")},
89  { 3,  6, N_("On, red-eye reduction")},
90  { 3, 16, N_("External flash")},
91  { 4,  0, N_("Single")},
92  { 4,  1, N_("Continuous")},
93  { 4,  2, N_("Movie")},
94  { 4,  3, N_("Continuous, speed priority")},
95  { 4,  4, N_("Continuous, low")},
96  { 4,  5, N_("Continuous, high")},
97  { 6,  0, N_("One-shot AF")},
98  { 6,  1, N_("AI servo AF")},
99  { 6,  2, N_("AI focus AF")},
100  { 6,  3, N_("Manual focus")},
101  { 6,  4, N_("Single")},
102  { 6,  5, N_("Continuous")},
103  { 6,  6, N_("Manual focus")},
104  { 6,  16, N_("Pan focus")},
105  { 8,  1, N_("JPEG")},
106  { 8,  2, N_("CRW+THM")},
107  { 8,  3, N_("AVI+THM")},
108  { 8,  4, N_("TIF")},
109  { 8,  5, N_("TIF+JPEG")},
110  { 8,  6, N_("CR2")},
111  { 8,  7, N_("CR2+JPEG")},
112  { 9,  0, N_("Large")},
113  { 9,  1, N_("Medium")},
114  { 9,  2, N_("Small")},
115  { 9,  5, N_("Medium 1")},
116  { 9,  6, N_("Medium 2")},
117  { 9,  7, N_("Medium 3")},
118  { 9,  8, N_("Postcard")},
119  { 9,  9, N_("Widescreen")},
120  {10,  0, N_("Full auto")},
121  {10,  1, N_("Manual")},
122  {10,  2, N_("Landscape")},
123  {10,  3, N_("Fast shutter")},
124  {10,  4, N_("Slow shutter")},
125  {10,  5, N_("Night")},
126  {10,  6, N_("Grayscale")},
127  {10,  7, N_("Sepia")},
128  {10,  8, N_("Portrait")},
129  {10,  9, N_("Sports")},
130  {10, 10, N_("Macro")},
131  {10, 11, N_("Black & white")},
132  {10, 12, N_("Pan focus")},
133  {10, 13, N_("Vivid")},
134  {10, 14, N_("Neutral")},
135  {10, 15, N_("Flash off")},
136  {10, 16, N_("Long shutter")},
137  {10, 17, N_("Super macro")},
138  {10, 18, N_("Foliage")},
139  {10, 19, N_("Indoor")},
140  {10, 20, N_("Fireworks")},
141  {10, 21, N_("Beach")},
142  {10, 22, N_("Underwater")},
143  {10, 23, N_("Snow")},
144  {10, 24, N_("Kids & pets")},
145  {10, 25, N_("Night snapshot")},
146  {10, 26, N_("Digital macro")},
147  {10, 27, N_("My colors")},
148  {10, 28, N_("Still image")},
149  {10, 30, N_("Color accent")},
150  {10, 31, N_("Color swap")},
151  {10, 32, N_("Aquarium")},
152  {10, 33, N_("ISO 3200")},
153  {11, 0, N_("None")},
154  {11, 1, N_("2x")},
155  {11, 2, N_("4x")},
156  {11, 3, N_("Other")},
157  {12, 0x0000, N_("Normal")},
158  {12, 0x0001, N_("High")},
159  {12, 0xffff, N_("Low")},
160  {13, 0x0000, N_("Normal")},
161  {13, 0x0001, N_("High")},
162  {13, 0xffff, N_("Low")},
163  {14, 0x0000, N_("Normal")},
164  {14, 0x0001, N_("High")},
165  {14, 0xffff, N_("Low")},
166  {15, 14, N_("Auto high")},
167  {15, 15, N_("Auto")},
168  {15, 16, N_("50")},
169  {15, 17, N_("100")},
170  {15, 18, N_("200")},
171  {15, 19, N_("400")},
172  {15, 20, N_("800")},
173  {16,  0, N_("Default")},
174  {16,  1, N_("Spot")},
175  {16,  2, N_("Average")},
176  {16,  3, N_("Evaluative")},
177  {16,  4, N_("Partial")},
178  {16,  5, N_("Center-weighted average")},
179  {17,  0, N_("Manual")},
180  {17,  1, N_("Auto")},
181  {17,  2, N_("Not known")},
182  {17,  3, N_("Macro")},
183  {17,  4, N_("Very close")},
184  {17,  5, N_("Close")},
185  {17,  6, N_("Middle range")},
186  {17,  7, N_("Far range")},
187  {17,  8, N_("Pan focus")},
188  {17,  9, N_("Super macro")},
189  {17,  10, N_("Infinity")},
190  {18, 0x2005, N_("Manual AF point selection")},
191  {18, 0x3000, N_("None (MF)")},
192  {18, 0x3001, N_("Auto-selected")},
193  {18, 0x3002, N_("Right")},
194  {18, 0x3003, N_("Center")},
195  {18, 0x3004, N_("Left")},
196  {18, 0x4001, N_("Auto AF point selection")},
197  {19,  0, N_("Easy shooting")},
198  {19,  1, N_("Program")},
199  {19,  2, N_("Tv-priority")},
200  {19,  3, N_("Av-priority")},
201  {19,  4, N_("Manual")},
202  {19,  5, N_("A-DEP")},
203  {19,  6, N_("M-DEP")},
204  {21,   1, N_("Canon EF 50mm f/1.8")},
205  {21,   2, N_("Canon EF 28mm f/2.8")},
206  {21,   4, N_("Sigma UC Zoom 35-135mm f/4-5.6")},
207  {21,   6, N_("Tokina AF193-2 19-35mm f/3.5-4.5")},
208  {21,   7, N_("Canon EF 100-300mm F5.6L")},
209  {21,  10, N_("Sigma 50mm f/2.8 EX or 28mm f/1.8")},
210  {21,  11, N_("Canon EF 35mm f/2")},
211  {21,  13, N_("Canon EF 15mm f/2.8")},
212  {21,  21, N_("Canon EF 80-200mm f/2.8L")},
213  {21,  22, N_("Tokina AT-X280AF PRO 28-80mm F2.8 Aspherical")},
214  {21,  26, N_("Cosina 100mm f/3.5 Macro AF")},
215  {21,  28, N_("Tamron AF Aspherical 28-200mm f/3.8-5.6")},
216  {21,  29, N_("Canon EF 50mm f/1.8 MkII")},
217  {21,  31, N_("Tamron SP AF 300mm f/2.8 LD IF")},
218  {21,  32, N_("Canon EF 24mm f/2.8 or Sigma 15mm f/2.8 EX Fisheye")},
219  {21,  37, N_("Canon EF 35-80mm f/4-5.6")},
220  {21,  39, N_("Canon EF 75-300mm f/4-5.6")},
221  {21,  40, N_("Canon EF 28-80mm f/3.5-5.6")},
222  {21,  43, N_("Canon EF 28-105mm f/4-5.6")},
223  {21,  45, N_("Canon EF-S 18-55mm f/3.5-5.6")},
224  {21,  52, N_("Canon EF-S 18-55mm f/3.5-5.6 IS II")},
225  {21, 124, N_("Canon MP-E 65mm f/2.8 1-5x Macro Photo")},
226  {21, 125, N_("Canon TS-E 24mm f/3.5L")},
227  {21, 126, N_("Canon TS-E 45mm f/2.8")},
228  {21, 127, N_("Canon TS-E 90mm f/2.8")},
229  {21, 130, N_("Canon EF 50mm f/1.0L")},
230  {21, 131, N_("Sigma 17-35mm f2.8-4 EX Aspherical HSM")},
231  {21, 134, N_("Canon EF 600mm f/4L IS")},
232  {21, 135, N_("Canon EF 200mm f/1.8L")},
233  {21, 136, N_("Canon EF 300mm f/2.8L")},
234  {21, 137, N_("Canon EF 85mm f/1.2L")},
235  {21, 139, N_("Canon EF 400mm f/2.8L")},
236  {21, 141, N_("Canon EF 500mm f/4.5L")},
237  {21, 142, N_("Canon EF 300mm f/2.8L IS")},
238  {21, 143, N_("Canon EF 500mm f/4L IS")},
239  {21, 149, N_("Canon EF 100mm f/2")},
240  {21, 150, N_("Sigma 20mm EX f/1.8")},
241  {21, 151, N_("Canon EF 200mm f/2.8L")},
242  {21, 152, N_("Sigma 10-20mm F4-5.6 or 12-24mm f/4.5-5.6 or 14mm f/2.8")},
243  {21, 153, N_("Canon EF 35-350mm f/3.5-5.6L")},
244  {21, 155, N_("Canon EF 85mm f/1.8 USM")},
245  {21, 156, N_("Canon EF 28-105mm f/3.5-4.5 USM")},
246  {21, 160, N_("Canon EF 20-35mm f/3.5-4.5 USM")},
247  {21, 161, N_("Canon EF 28-70mm f/2.8L or Sigma 24-70mm EX f/2.8")},
248  {21, 165, N_("Canon EF 70-200mm f/2.8 L")},
249  {21, 166, N_("Canon EF 70-200mm f/2.8 L + x1.4")},
250  {21, 167, N_("Canon EF 70-200mm f/2.8 L + x2")},
251  {21, 168, N_("Canon EF 28mm f/1.8 USM")},
252  {21, 169, N_("Sigma 15-30mm f/3.5-4.5 EX DG Aspherical")},
253  {21, 170, N_("Canon EF 200mm f/2.8L II")},
254  {21, 173, N_("Canon EF 180mm Macro f/3.5L or Sigma 180mm EX HSM Macro f/3.5")},
255  {21, 174, N_("Canon EF 135mm f/2L")},
256  {21, 176, N_("Canon EF 24-85mm f/3.5-4.5 USM")},
257  {21, 177, N_("Canon EF 300mm f/4L IS")},
258  {21, 178, N_("Canon EF 28-135mm f/3.5-5.6 IS")},
259  {21, 180, N_("Canon EF 35mm f/1.4L")},
260  {21, 181, N_("Canon EF 100-400mm f/4.5-5.6L IS + x1.4")},
261  {21, 182, N_("Canon EF 100-400mm f/4.5-5.6L IS + x2")},
262  {21, 183, N_("Canon EF 100-400mm f/4.5-5.6L IS")},
263  {21, 184, N_("Canon EF 400mm f/2.8L + x2")},
264  {21, 186, N_("Canon EF 70-200mm f/4L")},
265  {21, 190, N_("Canon EF 100mm f/2.8 Macro")},
266  {21, 191, N_("Canon EF 400mm f/4 DO IS")},
267  {21, 197, N_("Canon EF 75-300mm f/4-5.6 IS")},
268  {21, 198, N_("Canon EF 50mm f/1.4")},
269  {21, 202, N_("Canon EF 28-80 f/3.5-5.6 USM IV")},
270  {21, 211, N_("Canon EF 28-200mm f/3.5-5.6")},
271  {21, 213, N_("Canon EF 90-300mm f/4.5-5.6")},
272  {21, 214, N_("Canon EF-S 18-55mm f/3.5-4.5 USM")},
273  {21, 224, N_("Canon EF 70-200mm f/2.8L IS USM")},
274  {21, 225, N_("Canon EF 70-200mm f/2.8L IS USM + x1.4")},
275  {21, 226, N_("Canon EF 70-200mm f/2.8L IS USM + x2")},
276  {21, 229, N_("Canon EF 16-35mm f/2.8L")},
277  {21, 230, N_("Canon EF 24-70mm f/2.8L")},
278  {21, 231, N_("Canon EF 17-40mm f/4L")},
279  {21, 232, N_("Canon EF 70-300mm f/4.5-5.6 DO IS USM")},
280  {21, 234, N_("Canon EF-S 17-85mm f4-5.6 IS USM")},
281  {21, 235, N_("Canon EF-S10-22mm F3.5-4.5 USM")},
282  {21, 236, N_("Canon EF-S60mm F2.8 Macro USM")},
283  {21, 237, N_("Canon EF 24-105mm f/4L IS")},
284  {21, 238, N_("Canon EF 70-300mm F4-5.6 IS USM")},
285  {21, 241, N_("Canon EF 50mm F1.2L USM")},
286  {21, 242, N_("Canon EF 70-200mm f/4L IS USM")},
287  {21, 251, N_("Canon EF 70-200mm f/2.8L IS II USM")},
288  {28, 0, N_("Manual")},
289  {28, 1, N_("TTL")},
290  {28, 2, N_("A-TTL")},
291  {28, 3, N_("E-TTL")},
292  {28, 4, N_("FP sync enabled")},
293  {28, 7, N_("2nd-curtain sync used")},
294  {28, 11, N_("FP sync used")},
295  {28, 13, N_("Internal")},
296  {28, 14, N_("External")},
297  {31,  0, N_("Single")},
298  {31,  1, N_("Continuous")},
299  {32, 0, N_("Normal AE")},
300  {32, 1, N_("Exposure compensation")},
301  {32, 2, N_("AE lock")},
302  {32, 3, N_("AE lock + exposure compensation")},
303  {32, 4, N_("No AE")},
304  {33, 0, N_("Off")},
305  {33, 1, N_("On")},
306  {33, 2, N_("On, shot only")},
307  {39, 0, N_("Off")},
308  {39, 1, N_("Vivid")},
309  {39, 2, N_("Neutral")},
310  {39, 3, N_("Smooth")},
311  {39, 4, N_("Sepia")},
312  {39, 5, N_("Black & white")},
313  {39, 6, N_("Custom")},
314  {39, 100, N_("My color data")},
315  {40, 0, N_("Off")},
316  {40, 0x0500, N_("Full")},
317  {40, 0x0502, N_("2/3")},
318  {40, 0x0504, N_("1/3")},
319#endif
320  { 0,  0, NULL}
321},
322entries_focal_length [] = {
323#ifndef NO_VERBOSE_TAG_DATA
324	{0, 1, N_("Fixed")},
325	{0, 2, N_("Zoom")},
326#endif
327	{0, 0, NULL}
328},
329entries_settings_2 [] = {
330#ifndef NO_VERBOSE_TAG_DATA
331  { 6,  0, N_("Auto")},
332  { 6,  1, N_("Sunny")},
333  { 6,  2, N_("Cloudy")},
334  { 6,  3, N_("Tungsten")},
335  { 6,  4, N_("Fluorescent")},
336  { 6,  5, N_("Flash")},
337  { 6,  6, N_("Custom")},
338  { 6,  7, N_("Black & white")},
339  { 6,  8, N_("Shade")},
340  { 6,  9, N_("Manual temperature (Kelvin)")},
341  { 6,  10, N_("PC set 1")},
342  { 6,  11, N_("PC set 2")},
343  { 6,  12, N_("PC set 3")},
344  { 6,  14, N_("Daylight fluorescent")},
345  { 6,  15, N_("Custom 1")},
346  { 6,  16, N_("Custom 2")},
347  { 6,  17, N_("Underwater")},
348  { 7,  0, N_("Off")},
349  { 7,  1, N_("Night scene")},
350  { 7,  2, N_("On")},
351  { 7,  3, N_("None")},
352  { 13,  0x3000, N_("None (MF)")},
353  { 13,  0x3001, N_("Right")},
354  { 13,  0x3002, N_("Center")},
355  { 13,  0x3003, N_("Center-right")},
356  { 13,  0x3004, N_("Left")},
357  { 13,  0x3005, N_("Left-right")},
358  { 13,  0x3006, N_("Left-center")},
359  { 13,  0x3007, N_("All")},
360  { 15,  0, N_("Off")},
361  { 15,  1, N_("On (shot 1)")},
362  { 15,  2, N_("On (shot 2)")},
363  { 15,  3, N_("On (shot 3)")},
364  { 15,  0xffff, N_("On")},
365  { 25,  248, N_("EOS high-end")},
366  { 25,  250, N_("Compact")},
367  { 25,  252, N_("EOS mid-range")},
368  { 26,  0, N_("None")},
369  { 26,  1, N_("Rotate 90 CW")},
370  { 26,  2, N_("Rotate 180")},
371  { 26,  3, N_("Rotate 270 CW")},
372  { 26,  0xffff, N_("Rotated by software")},
373  { 27,  0, N_("Off")},
374  { 27,  1, N_("On")},
375  { 32,  0, N_("Off")},
376  { 32,  0x0014, N_("1/3")},
377  { 32,  0x008c, N_("2/3")},
378  { 32,  0x07d0, N_("Full")},
379#endif
380  {0, 0, NULL}
381},
382entries_panorama [] = {
383#ifndef NO_VERBOSE_TAG_DATA
384	{0, 0, N_("Left to right")},
385	{0, 1, N_("Right to left")},
386	{0, 2, N_("Bottom to top")},
387	{0, 3, N_("Top to bottom")},
388	{0, 4, N_("2x2 matrix (clockwise)")},
389#endif
390	{0, 0, NULL}
391},
392color_information [] = {
393#ifndef NO_VERBOSE_TAG_DATA
394  {0, 0, N_("Standard")},
395  {0, 1, N_("Manual")},
396  {0, 2, N_("Custom")},
397  {2, 0, N_("N/A")},
398  {2, 1, N_("Lowest")},
399  {2, 2, N_("Low")},
400  {2, 3, N_("Standard")},
401  {2, 4, N_("High")},
402  {2, 5, N_("Highest")},
403  {7,  0, N_("Auto")},
404  {7,  1, N_("Daylight")},
405  {7,  2, N_("Cloudy")},
406  {7,  3, N_("Tungsten")},
407  {7,  4, N_("Fluorescent")},
408  {7,  5, N_("Flash")},
409  {7,  6, N_("Custom")},
410  {7,  7, N_("Black & white")},
411  {7,  8, N_("Shade")},
412  {7,  9, N_("Manual temperature (Kelvin)")},
413  {7, 10, N_("PC set 1")},
414  {7, 11, N_("PC set 2")},
415  {7, 12, N_("PC set 3")},
416  {7, 14, N_("Daylight fluorescent")},
417  {7, 15, N_("Custom 1")},
418  {7, 16, N_("Custom 2")},
419  {7, 17, N_("Underwater")},
420  {9, 0x00, N_("None")},
421  {9, 0x01, N_("Standard")},
422  {9, 0x02, N_("Set 1")},
423  {9, 0x03, N_("Set 2")},
424  {9, 0x04, N_("Set 3")},
425  {9, 0x21, N_("User def. 1")},
426  {9, 0x22, N_("User def. 2")},
427  {9, 0x23, N_("User def. 3")},
428  {9, 0x41, N_("External 1")},
429  {9, 0x42, N_("External 2")},
430  {9, 0x43, N_("External 3")},
431  {9, 0x81, N_("Standard")},
432  {9, 0x82, N_("Portrait")},
433  {9, 0x83, N_("Landscape")},
434  {9, 0x84, N_("Neutral")},
435  {9, 0x85, N_("Faithful")},
436  {9, 0x86, N_("Monochrome")},
437#endif
438  {0, 0, NULL}
439};
440
441static void
442canon_search_table_value (const struct canon_entry_table_t table[],
443    unsigned int t, ExifShort vs, char *val, unsigned int maxlen)
444{
445	unsigned int j;
446
447	/* Search the table for the first matching subtag and value. */
448	for (j = 0; table[j].name && ((table[j].subtag < t) ||
449			((table[j].subtag == t) && table[j].value <= vs)); j++) {
450		if ((table[j].subtag == t) && (table[j].value == vs)) {
451			break;
452		}
453	}
454	if ((table[j].subtag == t) && (table[j].value == vs) && table[j].name) {
455		/* Matching subtag and value found. */
456		strncpy (val, _(table[j].name), maxlen);
457	} else {
458		/* No matching subtag and/or value found. */
459		snprintf (val, maxlen, "0x%04x", vs);
460	}
461}
462
463static void
464canon_search_table_bitfield (const struct canon_entry_table_t table[],
465    unsigned int t, ExifShort vs, char *val, unsigned int maxlen)
466{
467	unsigned int j;
468
469	/* Search the table for the first matching subtag. */
470	for (j = 0; table[j].name && (table[j].subtag <= t); j++) {
471		if (table[j].subtag == t) {
472			break;
473		}
474	}
475	if ((table[j].subtag == t) && table[j].name) {
476		unsigned int i, bit, lastbit = 0;
477
478		/*
479		 * Search the table for the last matching bit, because
480		 * that one needs no additional comma appended.
481		 */
482		for (i = j; table[i].name && (table[i].subtag == t); i++) {
483			bit = table[i].value;
484			if ((vs >> bit) & 1) {
485				lastbit = bit;
486			}
487		}
488		/* Search the table for all matching bits. */
489		for (i = j; table[i].name && (table[i].subtag == t); i++) {
490			bit = table[i].value;
491			if ((vs >> bit) & 1) {
492				strncat(val, _(table[i].name), maxlen - strlen (val));
493				if (bit != lastbit)
494					strncat (val, _(", "), maxlen - strlen (val));
495			}
496		}
497	} else {
498		/* No matching subtag found. */
499		snprintf (val, maxlen, "0x%04x", vs);
500	}
501}
502
503unsigned int
504mnote_canon_entry_count_values (const MnoteCanonEntry *entry)
505{
506	unsigned int  val;
507
508	if (!entry) return 0;
509
510	switch (entry->tag) {
511	case MNOTE_CANON_TAG_FOCAL_LENGTH:
512	case MNOTE_CANON_TAG_PANORAMA:
513		return entry->components;
514	case MNOTE_CANON_TAG_SETTINGS_1:
515	case MNOTE_CANON_TAG_SETTINGS_2:
516	case MNOTE_CANON_TAG_CUSTOM_FUNCS:
517	case MNOTE_CANON_TAG_COLOR_INFORMATION:
518		if (entry->format != EXIF_FORMAT_SHORT) return 0;
519
520		val = exif_get_short (entry->data, entry->order);
521		/* val is buffer size, i.e. # of values plus 1 */
522		return MIN (entry->size - 2, val) / 2;
523	default:
524		return 1;
525	}
526}
527
528/*
529 * For reference, see Exif 2.1 specification (Appendix C),
530 * or http://en.wikipedia.org/wiki/APEX_system
531 */
532static double
533apex_value_to_aperture (double x)
534{
535	return pow (2, x / 2.);
536}
537
538static double
539apex_value_to_shutter_speed(double x)
540{
541	return 1.0 / pow (2, x);
542}
543
544static double
545apex_value_to_iso_speed (double x)
546{
547	return 3.125 * pow (2, x);
548}
549
550char *
551mnote_canon_entry_get_value (const MnoteCanonEntry *entry, unsigned int t, char *val, unsigned int maxlen)
552{
553	char buf[128];
554	ExifLong vl;
555	ExifShort vs, n;
556	unsigned char *data;
557	double d;
558
559	if (!entry)
560		return NULL;
561
562	data = entry->data;
563
564	memset (val, 0, maxlen);
565	maxlen--;
566
567	switch (entry->tag) {
568	case MNOTE_CANON_TAG_SETTINGS_1:
569		CF (entry->format, EXIF_FORMAT_SHORT, val, maxlen);
570		n = exif_get_short (data, entry->order) / 2;
571		if (t >= n) return NULL;
572		CC (entry->components, n, val, maxlen);
573		vs = exif_get_short (data + 2 + t * 2, entry->order);
574		switch (t) {
575		case 1:
576			if (!vs) {
577				strncpy(val, _("Off"), maxlen);
578				break;
579			}
580			snprintf (val, maxlen, _("%i (ms)"), vs * 100);
581			break;
582		case 15:
583			if (((vs & 0xC000) == 0x4000) && (vs != 0x7FFF)) {
584				/* Canon S3 IS - directly specified value */
585				snprintf (val, maxlen, "%i", vs & ~0x4000);
586			} else {
587				/* Standard Canon - index into lookup table */
588				canon_search_table_value (entries_settings_1, t, vs, val, maxlen);
589			}
590			break;
591		case 22:
592		case 23:
593		case 24:
594			snprintf (val, maxlen, "%u", vs);
595			break;
596		case 25:
597		case 26:
598			snprintf (val, maxlen, "%.2f", apex_value_to_aperture (vs / 32.0));
599			break;
600		case 28:
601			canon_search_table_bitfield(entries_settings_1, t, vs, val, maxlen);
602			break;
603		case 34:
604			snprintf (val, maxlen, "%.2f", vs / 10.0);
605			break;
606		case 35:
607		case 36:
608			snprintf (val, maxlen, "%u", vs);
609			break;
610		default:
611			canon_search_table_value (entries_settings_1, t, vs, val, maxlen);
612		}
613		break;
614
615	case MNOTE_CANON_TAG_FOCAL_LENGTH:
616		CF (entry->format, EXIF_FORMAT_SHORT, val, maxlen);
617		vs = exif_get_short (data + t * 2, entry->order);
618		switch (t) {
619		case 1:
620			snprintf (val, maxlen, "%u", vs);
621			break;
622		case 2:
623		case 3:
624			snprintf (val, maxlen, _("%.2f mm"), vs * 25.4 / 1000);
625			break;
626		default:
627			canon_search_table_value (entries_focal_length, t, vs, val, maxlen);
628		}
629		break;
630
631	case MNOTE_CANON_TAG_SETTINGS_2:
632		CF (entry->format, EXIF_FORMAT_SHORT, val, maxlen);
633		n = exif_get_short (data, entry->order) / 2;
634		if (t >= n) return NULL;
635		CC (entry->components, n, val, maxlen);
636		vs = exif_get_short (data + 2 + t * 2, entry->order);
637		switch (t) {
638		case 0:
639			snprintf (val, maxlen, "%.3f", pow (2, (ExifSShort)vs / 32.0));
640			break;
641		case 1:
642			snprintf (val, maxlen, "%.0f", apex_value_to_iso_speed ((ExifSShort)vs / 32.0));
643			break;
644		case 2:
645		case 5:
646		case 14:
647		case 16:
648			snprintf (val, maxlen, _("%.2f EV"), (ExifSShort)vs / 32.0);
649			break;
650		case 3:
651		case 20:
652			snprintf (val, maxlen, "%.2f", apex_value_to_aperture (vs / 32.0));
653			break;
654		case 4:
655		case 21:
656			d = apex_value_to_shutter_speed ((ExifSShort)vs / 32.0);
657			if (d < 1)
658				snprintf (val, maxlen, _("1/%i"),(int)(1.0 / d));
659			else
660				snprintf (val, maxlen, "%i", (int) d);
661			break;
662		case 8:
663			snprintf (val, maxlen, "%u", vs);
664			break;
665		case 12:
666			snprintf (val, maxlen, "%.2f", vs / 32.0);
667			break;
668		case 18:
669		case 19:
670			snprintf (val, maxlen, _("%u mm"), vs);
671			break;
672		case 28:
673			if ((ExifSShort)vs <= 0) {
674				strncpy(val, _("Off"), maxlen);
675				break;
676			}
677			snprintf (val, maxlen, _("%i (ms)"), vs * 100);
678			break;
679		default:
680			canon_search_table_value (entries_settings_2, t, vs, val, maxlen);
681		}
682		break;
683
684	case MNOTE_CANON_TAG_PANORAMA:
685		CF (entry->format, EXIF_FORMAT_SHORT, val, maxlen);
686		vs = exif_get_short (data + t * 2, entry->order);
687		canon_search_table_value (entries_panorama, t, vs, val, maxlen);
688		break;
689
690	case MNOTE_CANON_TAG_OWNER:
691		CC (entry->components, 32, val, maxlen);
692		/* Fall through; ImageType can have many sizes */
693	case MNOTE_CANON_TAG_IMAGE_TYPE:
694		CF (entry->format, EXIF_FORMAT_ASCII, val, maxlen);
695		strncpy (val, (char *)data, MIN (entry->size, maxlen));
696		break;
697
698	case MNOTE_CANON_TAG_FIRMWARE:
699		CF (entry->format, EXIF_FORMAT_ASCII, val, maxlen);
700/*		CC2 (entry->components, 24, 32, val, maxlen); Can also be 22 */
701		strncpy (val, (char *)data, MIN (entry->size, maxlen));
702		break;
703
704	case MNOTE_CANON_TAG_IMAGE_NUMBER:
705		CF (entry->format, EXIF_FORMAT_LONG, val, maxlen);
706		CC (entry->components, 1, val, maxlen);
707		vl = exif_get_long (data, entry->order);
708		snprintf (val, maxlen, "%03lu-%04lu",
709				(unsigned long) vl/10000,
710				(unsigned long) vl%10000);
711		break;
712
713	case MNOTE_CANON_TAG_SERIAL_NUMBER:
714		CF (entry->format, EXIF_FORMAT_LONG, val, maxlen);
715		CC (entry->components, 1, val, maxlen);
716		vl = exif_get_long (data, entry->order);
717		snprintf (val, maxlen, "%04X-%05d", (int)vl>>16,(int)vl&0xffff);
718		break;
719
720	case MNOTE_CANON_TAG_CUSTOM_FUNCS:
721		CF (entry->format, EXIF_FORMAT_SHORT, val, maxlen);
722		n = exif_get_short (data, entry->order) / 2;
723		if (t >= n) return NULL;
724		CC (entry->components, n, val, maxlen);
725		vs = exif_get_short (data + 2 + t * 2, entry->order);
726		snprintf (buf, sizeof (buf), "%u", vs);
727		strncat (val, buf, maxlen - strlen (val));
728		break;
729
730	case MNOTE_CANON_TAG_COLOR_INFORMATION:
731		CF (entry->format, EXIF_FORMAT_SHORT, val, maxlen);
732		n = exif_get_short (data, entry->order) / 2;
733		if (t >= n) return NULL;
734		CC (entry->components, n, val, maxlen);
735		vs = exif_get_short (data + 2 + t * 2, entry->order);
736		canon_search_table_value (color_information, t, vs, val, maxlen);
737		break;
738
739	default:
740#ifdef DEBUG
741	  {
742		int i;
743		if (entry->format == EXIF_FORMAT_SHORT)
744		for(i=0;i<entry->components;i++) {
745			vs = exif_get_short (data, entry->order);
746			data+=2;
747			printf ("Value%d=%d\n", i, vs);
748		}
749		else if (entry->format == EXIF_FORMAT_LONG)
750		for(i=0;i<entry->components;i++) {
751			vl = exif_get_long (data, entry->order);
752			data+=4;
753			printf ("Value%d=%d\n", i, vs);
754		}
755		else if (entry->format == EXIF_FORMAT_ASCII)
756		    strncpy (val, data, MIN (entry->size, maxlen));
757	  }
758#endif
759		break;
760	}
761	return val;
762}
763