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Add frame counting capabilities to time conversion lib.

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This commit is contained in:
Stefan Kangas 2010-12-10 12:53:39 +01:00 committed by Ichthyostega
parent ebd93b0f12
commit d2702e8254
3 changed files with 36 additions and 0 deletions
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13
src/lib/time.c
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@ -91,3 +91,16 @@ lumiera_time_millis(gavl_time_t time)
{
return (time / GAVL_TIME_SCALE_MS) % 1000;
}
int
lumiera_time_frames(gavl_time_t time, float fps)
{
return (fps * (lumiera_time_millis(time))) / 1000;
}
int
lumiera_time_frame_count(gavl_time_t time, float fps)
{
int ms = (time / GAVL_TIME_SCALE_MS);
return fps * ms / 1000;
}

14
src/lib/time.h
View file

@ -60,5 +60,19 @@ int lumiera_time_seconds(gavl_time_t time);
*/
int lumiera_time_millis(gavl_time_t time);
/**
* Get the frame part of given time, using the given number of frames.
* @param gavl_time_t the time we are interested in converting
* @param fps Frame rate (float for now, but should be a rational)
*/
int lumiera_time_frames(gavl_time_t time, float fps);
/**
* Get the frame count for the given time.
* @param gavl_time_t the time we are interested in converting
* @param fps Frame rate (float for now, but should be a rational)
*/
int lumiera_time_frame_count(gavl_time_t time, float fps);
#endif

9
tests/library/test-time.c
View file

@ -32,6 +32,7 @@ const int MILLIS = 700;
const int SECONDS = 20;
const int MINUTES = 55;
const int HOURS = 3;
const float FPS = 24.0;
/*
* 1. Basic functionality
@ -46,6 +47,10 @@ TEST (basic) {
CHECK (lumiera_time_seconds(t) == 0);
CHECK (lumiera_time_minutes(t) == 0);
CHECK (lumiera_time_hours(t) == 0);
CHECK (lumiera_time_frames(t, FPS) == 0);
CHECK (lumiera_time_frames(t, FPS+5) == 0);
CHECK (lumiera_time_frame_count(t, FPS) == 0);
CHECK (lumiera_time_frame_count(t, FPS+5) == 0);
ECHO ("%s", lumiera_tmpbuf_print_time(t));
@ -56,6 +61,10 @@ TEST (basic) {
CHECK (lumiera_time_seconds(t) == SECONDS);
CHECK (lumiera_time_minutes(t) == MINUTES);
CHECK (lumiera_time_hours(t) == HOURS);
CHECK (lumiera_time_frames(t, FPS) == (int)((FPS * MILLIS) / 1000));
CHECK (lumiera_time_frames(t, FPS+5) == (int)(((FPS+5) * MILLIS) / 1000));
CHECK (lumiera_time_frame_count(t, FPS) == 338896);
CHECK (lumiera_time_frame_count(t, FPS+5) == 409500);
ECHO ("%s", lumiera_tmpbuf_print_time(t));
}