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#include "framewalk_to_beats_test.h"
#include "ardour/tempo.h"
#include "timecode/bbt_time.h"
CPPUNIT_TEST_SUITE_REGISTRATION (FramewalkToBeatsTest);
using namespace std;
using namespace ARDOUR;
using namespace Timecode;
void
FramewalkToBeatsTest::singleTempoTest ()
{
int const sampling_rate = 48000;
int const bpm = 120;
double const frames_per_beat = (60 / double (bpm)) * double (sampling_rate);
TempoMap map (sampling_rate);
Tempo tempo (bpm);
Meter meter (4, 4);
map.add_meter (meter, BBT_Time (1, 1, 0));
map.add_tempo (tempo, BBT_Time (1, 1, 0));
/* Walk 1 beats-worth of frames from beat 3 */
double r = map.framewalk_to_beats (frames_per_beat * 2, frames_per_beat * 1);
CPPUNIT_ASSERT_EQUAL (r, 1.0);
/* Walk 6 beats-worth of frames from beat 4 */
r = map.framewalk_to_beats (frames_per_beat * 3, frames_per_beat * 6);
CPPUNIT_ASSERT_EQUAL (r, 6.0);
/* Walk 1.5 beats-worth of frames from beat 3 */
r = map.framewalk_to_beats (frames_per_beat * 2, frames_per_beat * 1.5);
CPPUNIT_ASSERT_EQUAL (r, 1.5);
/* Walk 1.5 beats-worth of frames from beat 2.5 */
r = map.framewalk_to_beats (frames_per_beat * 2.5, frames_per_beat * 1.5);
CPPUNIT_ASSERT_EQUAL (r, 1.5);
}
void
FramewalkToBeatsTest::doubleTempoTest ()
{
int const sampling_rate = 48000;
TempoMap map (sampling_rate);
Meter meter (4, 4);
map.add_meter (meter, BBT_Time (1, 1, 0));
/*
120bpm at bar 1, 240bpm at bar 4
120bpm = 24e3 samples per beat
240bpm = 12e3 samples per beat
*/
/*
120bpm 240bpm
0 beats 12 beats
0 frames 288e3 frames
| | | | |
| 1.1 1.2 1.3 1.4 | 2.1 2.2 2.3.2.4 | 3.1 3.2 3.3 3.4 | 4.1 4.2 4.3 4.4 |
*/
Tempo tempoA (120);
map.add_tempo (tempoA, BBT_Time (1, 1, 0));
Tempo tempoB (240);
map.add_tempo (tempoB, BBT_Time (4, 1, 0));
/* Now some tests */
/* Walk 1 beat from 1.2 */
double r = map.framewalk_to_beats (24e3, 24e3);
CPPUNIT_ASSERT_EQUAL (r, 1.0);
/* Walk 2 beats from 3.3 to 4.1 (over the tempo change) */
r = map.framewalk_to_beats (264e3, (24e3 + 12e3));
CPPUNIT_ASSERT_EQUAL (r, 2.0);
/* Walk 2.5 beats from 3.3-and-a-half to 4.2 (over the tempo change) */
r = map.framewalk_to_beats (264e3 - 12e3, (24e3 + 12e3 + 12e3));
CPPUNIT_ASSERT_EQUAL (r, 2.5);
/* Walk 3 beats from 3.4-and-a-half to 4.3-and-a-half (over the tempo change) */
r = map.framewalk_to_beats (264e3 - 12e3, (24e3 + 12e3 + 12e3 + 6e3));
CPPUNIT_ASSERT_EQUAL (r, 3.0);
/* Walk 3.5 beats from 3.4-and-a-half to 4.4 (over the tempo change) */
r = map.framewalk_to_beats (264e3 - 12e3, (24e3 + 12e3 + 12e3 + 12e3));
CPPUNIT_ASSERT_EQUAL (r, 3.5);
}
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