This source file includes following definitions.
- live_histogram_read_y
- live_histogram_get_range
- shooting_calc_autoiso_coef
- shooting_recalc_conf_autoiso_values
- shooting_set_autoiso
1 #include "camera_info.h"
2 #include "math.h"
3 #include "conf.h"
4 #include "viewport.h"
5 #include "shooting.h"
6 #include "modes.h"
7 #include "lens.h"
8
9
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22
23
24 #ifdef THUMB_FW
25
26 #define HISTO_STEP_SIZE 48
27 #else
28
29 #define HISTO_STEP_SIZE 36
30 #endif
31
32 static unsigned short live_histogram_proc[256];
33
34
35
36
37
38 int live_histogram_read_y(unsigned short *h)
39 {
40 int yscale = vid_get_viewport_yscale();
41 #ifdef THUMB_FW
42 int vp_width = vid_get_viewport_width_proper() * 2;
43 #else
44 int vp_width = vid_get_viewport_width_proper() * 6 / 4;
45 #endif
46 int vp_height = vid_get_viewport_height_proper() / yscale;
47
48 int total = (vp_width * vp_height) / HISTO_STEP_SIZE;
49
50 unsigned char *img = vid_get_viewport_active_buffer();
51 if (img)
52 {
53 if (h == 0) h = live_histogram_proc;
54 memset(h, 0, sizeof(unsigned short)*256);
55
56 int vp_offset = vid_get_viewport_byte_width() * yscale;
57 img += vid_get_viewport_image_offset() + 1;
58
59 int x, y;
60 for (y=0; y<vp_height; y+=1, img+=vp_offset)
61 {
62 for (x=HISTO_STEP_SIZE/2; x<vp_width; x+=HISTO_STEP_SIZE)
63 {
64 h[img[x]] += 1;
65
66 }
67 }
68 }
69
70 return total;
71 }
72
73 static int live_histogram_get_range(int total,int from, int to)
74 {
75 if (from < 0) from = 0;
76 if (to > 255) to = 255;
77
78 int rv = 0;
79 for(; from<=to; from++)
80 rv += live_histogram_proc[from];
81
82 return (rv * 100) / total;
83 }
84
85
86
87 static const int shutter1_values[] = { 0, 2, 4, 6, 8, 15, 30, 60, 125, 250, 500, 1000, 2000 };
88 static const int shutter2_values[] = { 0, 1, 2, 4, 6, 8, 12, 15, 20, 25, 30, 40, 50, 60, 80, 100, 125, 160, 200, 250, 500, 1000, 2000 };
89
90 static void shooting_calc_autoiso_coef( int min_shutter )
91 {
92 if (shutter2_values[conf.autoiso2_shutter_enum] >= min_shutter)
93 {
94 conf.autoiso2_coef = 0.0;
95 }
96 else
97 {
98 conf.autoiso2_coef = (float)(conf.autoiso2_max_iso_auto_real - conf.autoiso_max_iso_auto_real) /
99 (float)( shutter2_values[conf.autoiso2_shutter_enum] - min_shutter);
100 }
101 }
102
103 static void shooting_recalc_conf_autoiso_values()
104 {
105
106 conf.autoiso_max_iso_hi_real = shooting_iso_market_to_real(conf.autoiso_max_iso_hi) ;
107 conf.autoiso_max_iso_auto_real = shooting_iso_market_to_real(conf.autoiso_max_iso_auto) ;
108 conf.autoiso_min_iso_real = shooting_iso_market_to_real(conf.autoiso_min_iso) ;
109 conf.autoiso2_max_iso_auto_real = shooting_iso_market_to_real(conf.autoiso2_max_iso_auto) ;
110
111
112
113
114 if ( !shutter2_values[conf.autoiso2_shutter_enum] )
115 conf.autoiso2_max_iso_auto_real = conf.autoiso_max_iso_auto_real;
116
117
118 shooting_calc_autoiso_coef( shutter1_values[conf.autoiso_shutter_enum] );
119 }
120
121 void shooting_set_autoiso(int iso_mode)
122 {
123 short max_iso;
124
125 if (iso_mode<=0)
126 shooting_recalc_conf_autoiso_values();
127
128 switch (iso_mode)
129 {
130 case -1:
131
132 max_iso = conf.autoiso_max_iso_hi_real;
133 break;
134 case 0:
135
136 max_iso = conf.autoiso_max_iso_auto_real;
137 break;
138 default:
139 return;
140 }
141
142
143 if (camera_info.state.mode_shooting==MODE_M || camera_info.state.mode_shooting==MODE_TV || camera_info.state.mode_shooting==MODE_STITCH)
144 return;
145
146 int ev_overexp = 0;
147 if (conf.overexp_ev_enum)
148 {
149
150 int total = live_histogram_read_y(live_histogram_proc);
151
152
153 if (live_histogram_get_range(total,255-conf.autoiso2_over,255) >= conf.overexp_threshold)
154 ev_overexp = conf.overexp_ev_enum << 5;
155 }
156
157 float current_shutter = shooting_get_shutter_speed_from_tv96(shooting_get_tv96());
158
159 short current_iso = shooting_get_iso_real();
160
161 short min_shutter = shutter1_values[conf.autoiso_shutter_enum];
162 if (min_shutter == 0)
163 {
164 short IS_factor = (shooting_get_is_mode()<=1)?conf.autoiso_is_factor:1;
165 min_shutter = get_focal_length(lens_get_zoom_point())*conf.autoiso_user_factor / (IS_factor*1000);
166
167 if (shutter2_values[conf.autoiso2_shutter_enum])
168 shooting_calc_autoiso_coef( min_shutter );
169 }
170
171 short target_iso = current_iso * min_shutter * current_shutter;
172 short min_iso = conf.autoiso_min_iso_real;
173
174 if (target_iso > max_iso)
175 {
176 ev_overexp=0;
177
178
179
180
181
182 if ( !iso_mode && conf.autoiso2_coef < 0.0 )
183 {
184 target_iso = (max_iso - min_shutter*conf.autoiso2_coef) / ( 1.0 - conf.autoiso2_coef / (current_shutter * current_iso) );
185 if ( target_iso > conf.autoiso2_max_iso_auto_real )
186 target_iso = conf.autoiso2_max_iso_auto_real;
187 }
188 else
189 {
190 target_iso = max_iso;
191 }
192 }
193 else if (target_iso < min_iso)
194 {
195 target_iso = min_iso;
196 }
197
198 float target_shutter = current_shutter * current_iso / target_iso;
199
200 if (target_shutter > 0)
201 shooting_set_tv96_direct(shooting_get_tv96_from_shutter_speed(target_shutter) + ev_overexp, SET_NOW);
202
203 shooting_set_iso_real(target_iso, SET_NOW);
204 }
205
206