52 lines
1.0 KiB
C
52 lines
1.0 KiB
C
/* Copyright (C) 2007-2010 Erik Faye-Lund and Egbert Teeselink
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* For conditions of distribution and use, see copyright notice in COPYING
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*/
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#ifndef SYNC_TRACK_H
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#define SYNC_TRACK_H
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#include <string.h>
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#include <stdlib.h>
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#include "base.h"
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enum key_type {
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KEY_STEP, /* stay constant */
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KEY_LINEAR, /* lerp to the next value */
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KEY_SMOOTH, /* smooth curve to the next value */
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KEY_RAMP,
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KEY_TYPE_COUNT
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};
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struct track_key {
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int row;
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float value;
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enum key_type type;
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};
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struct sync_track {
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char *name;
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struct track_key *keys;
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size_t num_keys;
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};
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int sync_find_key(const struct sync_track *, int);
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static inline int key_idx_floor(const struct sync_track *t, int row)
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{
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int idx = sync_find_key(t, row);
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if (idx < 0)
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idx = -idx - 2;
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return idx;
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}
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#ifndef SYNC_PLAYER
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void sync_set_key(struct sync_track *, const struct track_key *);
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void sync_del_key(struct sync_track *, int);
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static inline int is_key_frame(const struct sync_track *t, size_t row)
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{
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return sync_find_key(t, row) >= 0;
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}
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#endif /* !defined(SYNC_PLAYER) */
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#endif /* SYNC_TRACK_H */
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