tempo_test.cc

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#include "ardour/tempo.h"
#include "tempo_test.h"

CPPUNIT_TEST_SUITE_REGISTRATION (TempoTest);

using namespace std;
using namespace ARDOUR;
using namespace Timecode;

void
TempoTest::recomputeMapTest ()
{
        int const sampling_rate = 48000;

        TempoMap map (sampling_rate);
        Meter meterA (4, 4);
        map.add_meter (meterA, 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 |

        */

        Tempo tempoA (120);
        map.add_tempo (tempoA, BBT_Time (1, 1, 0));
        Tempo tempoB (240);
        map.add_tempo (tempoB, BBT_Time (4, 1, 0));
        Meter meterB (3, 4);
        map.add_meter (meterB, BBT_Time (4, 1, 0));

        list<MetricSection*>::iterator i = map.metrics.begin();
        CPPUNIT_ASSERT_EQUAL (framepos_t (0), (*i)->frame ());

        i = map.metrics.end();
        --i;
        CPPUNIT_ASSERT_EQUAL (framepos_t (288e3), (*i)->frame ());
}