livetrax/libs/evoral/test/CurveTest.cpp

#include "CurveTest.hpp"
#include "evoral/ControlList.hpp"
#include "evoral/Curve.hpp"
#include <stdlib.h>

CPPUNIT_TEST_SUITE_REGISTRATION (CurveTest);

using namespace Evoral;

// linear y = Y0 + YS * x ;  with x = i * (X1 - X0) + X0; and i = [0..1023]
#define VEC1024LINCMP(X0, X1, Y0, YS)                                        \
    cl->curve ().get_vector ((X0), (X1), vec, 1024);                         \
    for (int i = 0; i < 1024; ++i) {                                         \
        char msg[64];                                                        \
        snprintf (msg, 64, "at i=%d (x0=%.1f, x1=%.1f, y0=%.1f, ys=%.3f)",   \
            i, X0, X1, Y0, YS);                                              \
        CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE (                               \
            msg,                                                             \
            (Y0) + i * (YS), vec[i],                                         \
            1e-24                                                            \
            );                                                               \
    }

void
CurveTest::twoPointLinear ()
{
	float vec[1024];

	boost::shared_ptr<Evoral::ControlList> cl = TestCtrlList();

	cl->create_curve ();
	cl->set_interpolation (ControlList::Linear);

	// add two points to curve
	cl->fast_simple_add (   0.0 , 2048.0);
	cl->fast_simple_add (8192.0 , 4096.0);

	cl->curve ().get_vector (1024.0, 2047.0, vec, 1024);

	VEC1024LINCMP (1024.0, 2047.0, 2304.f,  .25f);
	VEC1024LINCMP (2048.0, 2559.5, 2560.f,  .125f);
	VEC1024LINCMP (   0.0, 4092.0, 2048.f, 1.f);

	// greetings to tartina
	cl->curve ().get_vector (2048.0, 2048.0, vec, 1);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=1 @ 2048-2048", 2560.f, vec[0]);

	/* XXX WHAT DO WE EXPECT WITH veclen=1 AND  x1 > x0 ? */
#if 0
	/* .. interpolated value at (x1+x0)/2 */
	cl->curve ().get_vector (2048.0, 2049.0, vec, 1);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=1 @ 2048-2049", 2560.125f, vec[0]);

	cl->curve ().get_vector (2048.0, 2056.0, vec, 1);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=1 @ 2048-2049", 2561.f, vec[0]);
#else
	/* .. value at x0 */
	cl->curve ().get_vector (2048.0, 2049.0, vec, 1);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=1 , 2048-2049", 2560.f, vec[0]);

	cl->curve ().get_vector (2048.0, 2056.0, vec, 1);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=1 , 2048-2049", 2560.f, vec[0]);
#endif

	cl->curve ().get_vector (2048.0, 2048.0, vec, 2);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=2 , 2048-2048 @ 0", 2560.f, vec[0]);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=2 , 2048-2048 @ 1", 2560.f, vec[1]);

	cl->curve ().get_vector (2048.0, 2056.0, vec, 2);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=2 , 2048-2056 @ 0", 2560.f, vec[0]);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=2 , 2048-2056 @ 0", 2562.f, vec[1]);

	cl->curve ().get_vector (2048.0, 2056.0, vec, 3);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=3 , 2048-2056 @ 0", 2560.f, vec[0]);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=3 , 2048-2056 @ 1", 2561.f, vec[1]);
	CPPUNIT_ASSERT_EQUAL_MESSAGE ("veclen=3 , 2048-2056 @ 2", 2562.f, vec[2]);
}