int gWaveform::alloc(int datasize) {
ratio = chan->wave->size / (float) datasize;
if (ratio < 2)
return 0;
freeData();
data.size = datasize;
data.sup = (int*) malloc(data.size * sizeof(int));
data.inf = (int*) malloc(data.size * sizeof(int));
int offset = h() / 2;
int zero = y() + offset; // center, zero amplitude (-inf dB)
for (int i=0; i<data.size; i++) {
int pp; // point prev
int pn; // point next
/* resampling the waveform, hardcore way. Many thanks to
* http://fourier.eng.hmc.edu/e161/lectures/resize/node3.html
* Note: we use
* p = j * (m-1 / n)
* instead of
* p = j * (m-1 / n-1)
* in order to obtain 'datasize' cells to parse (and not datasize-1) */
pp = i * ((chan->wave->size - 1) / (float) datasize);
pn = (i+1) * ((chan->wave->size - 1) / (float) datasize);
if (pp % 2 != 0) pp -= 1;
if (pn % 2 != 0) pn -= 1;
float peaksup = 0.0f;
float peakinf = 0.0f;
int k = pp;
while (k < pn) {
if (chan->wave->data[k] > peaksup)
peaksup = chan->wave->data[k]; // Left data only
else
if (chan->wave->data[k] <= peakinf)
peakinf = chan->wave->data[k]; // Left data only
k += 2;
}
data.sup[i] = zero - (peaksup * chan->boost * offset);
data.inf[i] = zero - (peakinf * chan->boost * offset);
// avoid window overflow
if (data.sup[i] < y()) data.sup[i] = y();
if (data.inf[i] > y()+h()-1) data.inf[i] = y()+h()-1;
}
recalcPoints();
return 1;
}
void gWaveform::openEditMenu() {
if (selectionA == selectionB)
return;
menuOpen = true;
Fl_Menu_Item menu[] = {
{"Cut"},
{"Trim"},
{"Silence"},
{"Fade in"},
{"Fade out"},
{"Smooth edges"},
{"Set start/end here"},
{0}
};
if (chan->status == STATUS_PLAY) {
menu[0].deactivate();
menu[1].deactivate();
}
Fl_Menu_Button *b = new Fl_Menu_Button(0, 0, 100, 50);
b->box(G_BOX);
b->textsize(11);
b->textcolor(COLOR_TEXT_0);
b->color(COLOR_BG_0);
const Fl_Menu_Item *m = menu->popup(Fl::event_x(), Fl::event_y(), 0, 0, b);
if (!m) {
menuOpen = false;
return;
}
/* straightSel() to ensure that point A is always lower than B */
straightSel();
if (strcmp(m->label(), "Silence") == 0) {
wfx_silence(chan->wave, absolutePoint(selectionA), absolutePoint(selectionB));
selectionA = 0;
selectionB = 0;
stretchToWindow();
redraw();
menuOpen = false;
return;
}
if (strcmp(m->label(), "Set start/end here") == 0) {
glue_setBeginEndChannel(
(gdEditor *) window(), // parent
chan,
absolutePoint(selectionA) * 2, // stereo!
absolutePoint(selectionB) * 2, // stereo!
false, // no recalc (we do it here)
false // don't check
);
selectionA = 0;
selectionB = 0;
selectionA_abs = 0;
selectionB_abs = 0;
recalcPoints();
redraw();
menuOpen = false;
return;
}
if (strcmp(m->label(), "Cut") == 0) {
wfx_cut(chan->wave, absolutePoint(selectionA), absolutePoint(selectionB));
/* for convenience reset start/end points */
glue_setBeginEndChannel(
(gdEditor *) window(),
chan,
0,
chan->wave->size,
false);
selectionA = 0;
selectionB = 0;
selectionA_abs = 0;
selectionB_abs = 0;
setZoom(0);
menuOpen = false;
return;
}
if (strcmp(m->label(), "Trim") == 0) {
wfx_trim(chan->wave, absolutePoint(selectionA), absolutePoint(selectionB));
glue_setBeginEndChannel(
(gdEditor *) window(),
chan,
0,
chan->wave->size,
false);
selectionA = 0;
selectionB = 0;
selectionA_abs = 0;
selectionB_abs = 0;
stretchToWindow();
menuOpen = false;
redraw();
return;
}
if (!strcmp(m->label(), "Fade in") || !strcmp(m->label(), "Fade out")) {
int type = !strcmp(m->label(), "Fade in") ? 0 : 1;
wfx_fade(chan->wave, absolutePoint(selectionA), absolutePoint(selectionB), type);
selectionA = 0;
selectionB = 0;
stretchToWindow();
redraw();
menuOpen = false;
return;
}
if (!strcmp(m->label(), "Smooth edges")) {
wfx_smooth(chan->wave, absolutePoint(selectionA), absolutePoint(selectionB));
selectionA = 0;
selectionB = 0;
stretchToWindow();
redraw();
menuOpen = false;
return;
}
}
int gWaveform::alloc(int datasize)
{
ratio = chan->wave->size / (float) datasize;
if (ratio < 2)
return 0;
freeData();
data.size = datasize;
data.sup = (int*) malloc(data.size * sizeof(int));
data.inf = (int*) malloc(data.size * sizeof(int));
int offset = h() / 2;
int zero = y() + offset; // center, zero amplitude (-inf dB)
/* grid frequency: store a grid point every 'gridFreq' pixel. Must be
* even, as always */
int gridFreq = 0;
if (grid.level != 0) {
gridFreq = chan->wave->size / grid.level;
if (gridFreq % 2 != 0)
gridFreq--;
}
for (int i=0; i<data.size; i++) {
int pp; // point prev
int pn; // point next
/* resampling the waveform, hardcore way. Many thanks to
* http://fourier.eng.hmc.edu/e161/lectures/resize/node3.html
* Note: we use
* p = j * (m-1 / n)
* instead of
* p = j * (m-1 / n-1)
* in order to obtain 'datasize' cells to parse (and not datasize-1) */
pp = i * ((chan->wave->size - 1) / (float) datasize);
pn = (i+1) * ((chan->wave->size - 1) / (float) datasize);
if (pp % 2 != 0) pp -= 1;
if (pn % 2 != 0) pn -= 1;
float peaksup = 0.0f;
float peakinf = 0.0f;
/* scan the original data in chunks */
int k = pp;
while (k < pn) {
if (chan->wave->data[k] > peaksup)
peaksup = chan->wave->data[k]; // FIXME - Left data only
else
if (chan->wave->data[k] <= peakinf)
peakinf = chan->wave->data[k]; // FIXME - Left data only
/* print grid */
if (gridFreq != 0)
if (k % gridFreq == 0 && k != 0)
grid.points.add(i);
k += 2;
}
data.sup[i] = zero - (peaksup * chan->boost * offset);
data.inf[i] = zero - (peakinf * chan->boost * offset);
// avoid window overflow
if (data.sup[i] < y()) data.sup[i] = y();
if (data.inf[i] > y()+h()-1) data.inf[i] = y()+h()-1;
}
recalcPoints();
return 1;
}
