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player: return interpolated value as double

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The heavy lifting was already done in double precision, so just
return the full value to the user without truncating to float.
This commit is contained in:
Erik Faye-Lund 2012-08-10 15:04:59 +02:00
parent 7c43db7385
commit 739fc21cfd
2 changed files with 8 additions and 8 deletions
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2
sync/sync.h
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@ -35,7 +35,7 @@ void sync_set_io_cb(struct sync_device *d, struct sync_io_cb *cb);
#endif /* defined(SYNC_PLAYER) */
const struct sync_track *sync_get_track(struct sync_device *, const char *);
float sync_get_val(const struct sync_track *, double);
double sync_get_val(const struct sync_track *, double);
#ifdef __cplusplus
}

14
sync/track.c
View File

@ -13,27 +13,27 @@
#include "track.h"
#include "base.h"
static float key_linear(const struct track_key k[2], double row)
static double key_linear(const struct track_key k[2], double row)
{
double t = (row - k[0].row) / (k[1].row - k[0].row);
return (float)(k[0].value + (k[1].value - k[0].value) * t);
return k[0].value + (k[1].value - k[0].value) * t;
}
static float key_smooth(const struct track_key k[2], double row)
static double key_smooth(const struct track_key k[2], double row)
{
double t = (row - k[0].row) / (k[1].row - k[0].row);
t = t * t * (3 - 2 * t);
return (float)(k[0].value + (k[1].value - k[0].value) * t);
return k[0].value + (k[1].value - k[0].value) * t;
}
static float key_ramp(const struct track_key k[2], double row)
static double key_ramp(const struct track_key k[2], double row)
{
double t = (row - k[0].row) / (k[1].row - k[0].row);
t = pow(t, 2.0);
return (float)(k[0].value + (k[1].value - k[0].value) * t);
return k[0].value + (k[1].value - k[0].value) * t;
}
float sync_get_val(const struct sync_track *t, double row)
double sync_get_val(const struct sync_track *t, double row)
{
int idx, irow;