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1 #ifndef DSYS2_H_
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2 #define DSYS2_H_
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3
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4 #include <stdio.h>
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5
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6 struct dsys_demo;
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7 struct dsys_event;
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8
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9 typedef float demotime_t;
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10
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11 enum dsys_evtype {
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12 DSYS_SINGLE,
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13 DSYS_PERIODIC
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14 };
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15
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16 #ifdef __cplusplus
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17 extern "C" {
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18 #endif
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19
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20 struct dsys_demo *dsys_open(const char *fname);
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21 struct dsys_demo *dsys_open_stream(FILE *fp);
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22 void dsys_close(struct dsys_demo *demo);
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23
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24 void dsys_update(struct dsys_demo *demo, demotime_t tm);
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25
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26
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27 void dsys_start(struct dsys_demo *demo);
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28 void dsys_stop(struct dsys_demo *demo);
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29 int dsys_is_running(struct dsys_demo *demo);
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30
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31
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32 demotime_t dsys_duration(struct dsys_demo *demo);
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33 demotime_t dsys_time(struct dsys_demo *demo);
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34 float dsys_progress(struct dsys_demo *demo);
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35
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36 /* seek without continuity */
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37 void dsys_seek(struct dsys_demo *demo, demotime_t tm);
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38 void dsys_seek_norm(struct dsys_demo *demo, float t);
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39
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40 /* seek by accelerating time */
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41 void dsys_warp(struct dsys_demo *demo, demotime_t tm);
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42 void dsys_warp_norm(struct dsys_demo *demo, float t);
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43
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44
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45 /* events */
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46 struct dsys_event *dsys_event(struct dsys_demo *demo, const char *name);
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47
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48 enum dsys_evtype dsys_event_type(struct dsys_event *ev);
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49 float dsys_event_value(struct dsys_event *ev);
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50
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51 int dsys_event_callback(struct dsys_event *ev, void (*func)(struct dsys_event*, void*), void *cls);
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52 int dsys_event_link(struct dsys_event *ev, float *link);
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53
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54 /* event evaluators */
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55 float dsys_eval_step(struct dsys_event *ev, demotime_t t);
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56 float dsys_eval_lerp(struct dsys_event *ev, demotime_t t);
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57 float dsys_eval_sigmoid(struct dsys_event *ev, demotime_t t);
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58
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59 /* time conversion */
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60 demotime_t dsys_sec_to_dtime(float sec);
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61 demotime_t dsys_msec_to_dtime(unsigned long msec);
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62
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63 float dsys_dtime_to_sec(demotime_t tm);
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64 unsigned long dsys_dtime_to_msec(demotime_t tm);
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65
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66 #ifdef __cplusplus
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67 }
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68 #endif
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69
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70
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71 #endif /* DSYS2_H_ */
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