本文整理汇总了C++中Annotation::getTargetEnd方法的典型用法代码示例。如果您正苦于以下问题：C++ Annotation::getTargetEnd方法的具体用法？C++ Annotation::getTargetEnd怎么用？C++ Annotation::getTargetEnd使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Annotation的用法示例。
在下文中一共展示了Annotation::getTargetEnd方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: pitch_track
static bool pitch_track(Annotation &ann, get_f0_session *session)
{
QString p = ann.getAudioPath();
if (p.isEmpty())
return false;
SF_INFO sfinfo;
SNDFILE *sndfile = sf_open(p.toUtf8().constData(), SFM_READ, &sfinfo);
if (sndfile == 0)
return false;
sf_close(sndfile);
double fend = ((double) sfinfo.frames) / sfinfo.samplerate;
double beg = ann.getTargetStart() - 0.5;
double end = ann.getTargetEnd() + 0.5;
if (beg < 0.0)
beg = 0.0;
if (end > fend)
end = fend;
QVector<float> v;
get_f0(p.toUtf8().constData(), session, beg, end, callback, &v);
double t0 = ann.getTargetStart() - beg;
double step = (ann.getTargetEnd() - ann.getTargetStart()) / 29.0;
QVector<float> pitch_sample;
for (int i=0; i < 30; ++i) {
double t = t0 + step * i;
double x = t / session->par->frame_step;
double x1 = floor(x);
double x2 = ceil(x);
double x0 = x1 - 1.0;
double x3 = x2 + 1.0;
int i0 = int(x0) * 2;
int i1 = int(x1) * 2;
int i2 = int(x2) * 2;
int i3 = int(x3) * 2;
float vp0 = i0 >= 0 ? v.at(i0+1) : 0.0;
float vp1 = v.at(i1+1);
float vp2 = v.at(i2+1);
float vp3 = i3 < 60 ? v.at(i3+1) : 0.0;
double y;
if (vp1 < 0.5) {
// x1 unvoiced
if (vp2 < 0.5) {
// x1, x2 unvoiced
y = -1.0;
}
else {
// x1 unvoiced, x2 voiced
if (x - x1 < 0.5) {
// x is closer to unvoiced x1
y = -1.0;
}
else {
// x is closer to voiced x2
if (vp3 < 0.5) {
// x3 is unvoiced or ob
y = v.at(i2);
}
else {
// x3 is voiced
// extrapolate with x2 and x3
int y2 = v.at(i2);
int y3 = v.at(i3);
y = (x3*y2 - x2*y3 + (y3-y2)*x) / (x3 - x2);
}
}
}
}
else {
// x1 is voiced
if (vp2 < 0.5) {
// x1 voiced, x2 unvoiced
if (x2 - x < 0.5) {
// x is closer to unvoiced x2
y = -1.0;
}
else {
// x is closer to voiced x1
if (vp0 < 0.5) {
// x0 is unvoiced or ob
y = v.at(i1);
}
else {
// x0 is voiced
// extraploate with x0 and x1
int y0 = v.at(i0);
int y1 = v.at(i1);
y = (x1*y0 - x0*y1 + (y1-y0)*x) / (x1 - x0);
}
}
}
else {
// interpolate with x1 and x2
double y1 = v.at(i1);
double y2 = v.at(i2);
y = (y2 - y1) / (x2 - x1) * (x - x1) + y1;
}
//.........这里部分代码省略.........