Added editor for automated chopping up of audiofiles into samples.

1 files changed, 508 insertions, 0 deletions

diff --git a/dgedit/canvas.cc b/dgedit/canvas.cc
new file mode 100644
index 0000000..a487e27
--- /dev/null
+++ b/dgedit/canvas.cc
@@ -0,0 +1,508 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            canvas.cc
+ *
+ *  Tue Nov 10 08:37:37 CET 2009
+ *  Copyright 2009 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "canvas.h"
+
+#include <sndfile.h>
+#include <QMouseEvent>
+#include <QPaintEvent>
+#include <QPainter>
+#include <QKeyEvent>
+
+#include <math.h>
+
+#define DEFYSCALE 200
+#define MIPMAPS 65536
+
+Canvas::Canvas(QWidget *parent)
+  : QWidget(parent)
+{
+  setAttribute(Qt::WA_StaticContents);
+  setMouseTracking(true);
+  setFocusPolicy(Qt::ClickFocus);
+  data = NULL;
+  size = 0;
+  xscale = 1.0;
+  yscale = 1.0;
+  xoffset = 0.0;
+  yoffset = 0.5;
+
+  threshold = 0.5;
+  threshold_is_moving = false;
+  selection_is_moving_left = false;
+  selection_is_moving_right = false;
+  active_selection = NULL;
+
+  colBg = QColor(180, 200, 180);
+  colSec = QColor(160, 180, 160);
+  colWavMax = QColor(100, 100, 100);
+  colWavAvg = QColor(0, 0, 0);
+  colMax = QColor(127, 127, 255);
+  colHalf = QColor(180, 180, 255);
+  colThreshold = QColor(255, 127, 127);
+  colThresholdMoving = QColor(180, 0, 0);
+  colSelBg = QColor(255, 0, 0, 60);
+  colSel = QColor(255, 0, 0, 160);
+  colActiveSelBg = QColor(255, 255, 0, 60);
+  colActiveSel = QColor(255, 255, 0, 160);
+
+  setCursor(Qt::ArrowCursor);
+  
+  wav = QImage(width(), height(), QImage::Format_RGB32);
+}
+
+Canvas::~Canvas()
+{
+  if(data) delete[] data;
+}
+
+
+#define VALL(x) (x*2)
+#define VALU(x) (x*2+1)
+#define POWL(x) (x*2+2)
+#define POWU(x) (x*2+3)
+void Canvas::load(QString file)
+{
+  if(data) {
+    delete[] data;
+    data = NULL;
+    size = 0;
+
+    QMap<int, float*>::iterator i = mipmaps.begin();
+    while(i != mipmaps.end()) {
+      delete[] i.value();
+      i++;
+    }
+
+  }
+
+  SF_INFO sf_info;
+	SNDFILE *fh = sf_open(file.toStdString().c_str(), SFM_READ, &sf_info);
+  if(!fh) {
+    printf("Load error...\n");
+  }
+
+	size = sf_seek(fh, 0, SEEK_END);
+  data = new float[size];
+
+	sf_seek(fh, 0, SEEK_SET);
+	sf_read_float(fh, data, size); 
+
+	sf_close(fh);
+
+  for(size_t dev = 2; dev <= MIPMAPS; dev*=2) {
+    size_t mipmapsize = size/dev;
+
+    float *lookup = new float[mipmapsize * 4];
+    for(size_t i = 0; i < mipmapsize; i++) {
+      lookup[VALL(i)] = 0.0;
+      lookup[VALU(i)] = 0.0;
+      lookup[POWL(i)] = 0.0;
+      lookup[POWU(i)] = 0.0;
+      for(size_t j = i * dev; j < (i + 1) * dev; j++) {
+        if(data[j] > lookup[VALU(i)]) lookup[VALU(i)] = data[j];
+        if(data[j] < lookup[VALL(i)]) lookup[VALL(i)] = data[j];
+        if(data[j] > 0) lookup[POWU(i)] += data[j];
+        if(data[j] < 0) lookup[POWL(i)] += data[j];
+      }
+    }
+
+    mipmaps[dev] = lookup;
+  }
+}
+
+
+#define SCALEX ((xscale * (float)size/(float)width()) + 0.1)
+#define OFFSETX (xoffset * (float)size)
+float Canvas::mapX(float x)
+{
+  float val = (x - OFFSETX) / SCALEX;
+  return val;
+}
+
+float Canvas::unmapX(float x)
+{
+  float val = x * SCALEX + OFFSETX;
+  return val;
+}
+
+#define SCALEY ((yscale * 999.0 + 1.0 ) * (float)DEFYSCALE)
+#define OFFSETY (((float)height() / 2.0) + ((yoffset * 2.0 - 1.0) * SCALEY))
+float Canvas::mapY(float y)
+{
+  float val = OFFSETY + (y * SCALEY);
+  return val;
+}
+
+float Canvas::unmapY(float y)
+{
+  float val = (y - OFFSETY) / SCALEY;
+  return val;
+}
+
+void Canvas::mouseMoveEvent(QMouseEvent *event)
+{
+  if(threshold_is_moving) {
+    float val = unmapY(event->y());
+    if(fabs(val) > 1.0) val = 1.0;
+    threshold = fabs(val);
+    update();
+    return;
+  }
+
+  if(selection_is_moving_left) {
+    float val = unmapX(event->x());
+    if(val > active_selection->to) val = active_selection->to - 1;
+    active_selection->from = val;
+    update();
+    return;
+  }
+
+  if(selection_is_moving_right) {
+    float val = unmapX(event->x());
+    if(val < active_selection->from) val = active_selection->from + 1;
+    active_selection->to = val;
+    update();
+    return;
+  }
+
+  if(event->button() != Qt::LeftButton) {
+    if(abs(event->y() - mapY(threshold)) < 2 ||
+       abs(event->y() - mapY(-threshold)) < 2 ) {
+      setCursor(Qt::SplitVCursor);
+    } else {
+      setCursor(Qt::ArrowCursor);
+    }
+
+    // Check if a selection is being dragged.
+    QMap<int, Selection>::iterator i = _selections.begin();
+    while(i != _selections.end()) {
+      if(abs(event->x() - mapX(i.value().from)) < 2
+        || abs(event->x() - mapX(i.value().to)) < 2) {
+        setCursor(Qt::SplitHCursor);
+      }
+      i++;
+    }
+  }
+}
+
+void Canvas::mousePressEvent(QMouseEvent *event)
+{
+  if(event->button() == Qt::LeftButton) {
+
+    // Check if threshold is being dragged.
+    if(abs(event->y() - mapY(threshold)) < 2 ||
+       abs(event->y() - mapY(-threshold)) < 2 ) {
+      threshold_is_moving = true;
+      update();
+      return;
+    }
+
+    // Check if a selection is being dragged.
+    QMap<int, Selection>::iterator i = _selections.begin();
+    while(i != _selections.end()) {
+      if(abs(event->x() - mapX(i.value().from)) < 2) {
+        active_selection = &i.value();
+        selection_is_moving_left = true;
+        return;
+      }
+
+      if(abs(event->x() - mapX(i.value().to)) < 2) {
+        active_selection = &i.value();
+        selection_is_moving_right = true;
+        return;
+      }
+
+      i++;
+    }
+
+    // Check if a selection is being selected.
+    i = _selections.begin();
+    while(i != _selections.end()) {
+      if(event->x() > mapX(i.value().from) &&
+         event->x() < mapX(i.value().to)) {
+        active_selection = &i.value();
+        update();
+        return;
+      }
+
+      i++;
+    }
+
+    // Make new selection
+    int from = unmapX(event->x());
+    _selections[from] = Selection(from, from);
+    active_selection = &_selections[from];
+    selection_is_moving_right = true;
+    update();
+    return;
+  }
+}
+
+void Canvas::mouseReleaseEvent(QMouseEvent *event)
+{
+  if(event->button() == Qt::LeftButton) {
+    if(threshold_is_moving) {
+      threshold_is_moving = false;
+      setCursor(Qt::ArrowCursor);
+      update();
+      return;
+    }
+    if(selection_is_moving_left || selection_is_moving_right) {
+      selection_is_moving_left = false;
+      selection_is_moving_right = false;
+      setCursor(Qt::ArrowCursor);
+      update();
+      return;
+    }
+  }
+}
+
+void Canvas::resizeEvent(QResizeEvent *)
+{
+  wav = QImage(width(), height(), QImage::Format_RGB32);
+  updateWav();
+  update();
+}
+
+void Canvas::getWavValues(int last, int lx, float *vu, float *vl, float *avgu, float *avgl)
+{
+  float *lookup = data;
+  int dev = 1;
+
+  int i = 2;
+  while(i < (lx - last) && mipmaps.find(i) != mipmaps.end()) {
+    lookup = mipmaps[i];
+    dev = i;
+    i *= 2;
+  }
+
+  *vu = *vl = *avgu = *avgl = 0;
+  for(int i = last / dev; i < lx / dev; i++) {
+    float lval;
+    float uval;
+    float lpow;
+    float upow;
+    if(dev > 1) {
+      lval = -lookup[VALL(i)];
+      uval = -lookup[VALU(i)];
+      upow = -lookup[POWL(i)];
+      lpow = -lookup[POWU(i)];
+    } else {
+      lpow = upow = lval = uval = -lookup[i];
+    }
+    if(lpow < 0.0) *avgl += lpow;
+    if(upow > 0.0) *avgu += upow;
+    if(lval > *vl) *vl = lval;
+    if(uval < *vu) *vu = uval;
+  }
+  
+  if((lx - last) != 0) {
+    *avgu /= (float)(lx - last);
+    *avgl /= (float)(lx - last);
+  }
+}
+
+void Canvas::updateWav()
+{
+  QPainter painter(&wav);
+
+  painter.setPen(colBg);
+  painter.setBrush(colBg);
+  painter.drawRect(0, 0, wav.width(), wav.height());
+
+  painter.setPen(colSec);
+  int step = 44100;
+  for(size_t i = 0; i < size; i += step) {
+    painter.drawLine(mapX(i), mapY(1.0), mapX(i), mapY(-1.0));
+  }
+
+  painter.setPen(colMax);
+  painter.drawLine(0, mapY(1.0), wav.width(), mapY(1.0));
+  painter.drawLine(0, mapY(-1.0), wav.width(), mapY(-1.0));
+
+  painter.setPen(colHalf);
+  painter.drawLine(0, mapY(0.5), wav.width(), mapY(0.5));
+  painter.drawLine(0, mapY(-0.5), wav.width(), mapY(-0.5));
+
+  if(data) {
+    int last = unmapX(0);
+    for(int x = 0; x < wav.width(); x++) {
+      int lx = unmapX(x);
+      if(lx > (int)size || lx < 0) break;
+      float vu = 0;
+      float vl = 0;
+      float avgu = 0;
+      float avgl = 0;
+
+      getWavValues(last, lx, &vu, &vl, &avgu, &avgl);
+      
+      int c = mapY(0.0);
+
+      painter.setPen(colWavMax);
+      painter.drawLine(x, c, x, mapY(vu));
+      painter.drawLine(x, c, x, mapY(vl));
+
+      painter.setPen(colWavAvg);
+      painter.drawLine(x, c, x, mapY(avgu));
+      painter.drawLine(x, c, x, mapY(avgl));
+
+      last = lx;
+    }
+  }
+}
+
+void Canvas::paintEvent(QPaintEvent *event)
+{
+  QPainter painter(this);
+
+  painter.drawImage(event->rect(),wav,event->rect());
+
+  if(threshold_is_moving) painter.setPen(colThresholdMoving);
+  else painter.setPen(colThreshold);
+  painter.drawLine(event->rect().x(), mapY(threshold),
+                   event->rect().x() + event->rect().width(), mapY(threshold));
+  painter.drawLine(event->rect().x(), mapY(-threshold),
+                   event->rect().x() + event->rect().width(), mapY(-threshold));
+
+  int pos = unmapX(event->rect().x());
+  int width = unmapX(event->rect().width());
+  QMap<int, Selection>::iterator i = _selections.begin();
+  while(i != _selections.end()) {
+    int from = i.value().from;
+    int to = i.value().to;
+    int fadein = i.value().fadein;
+    int fadeout = i.value().fadeout;
+    if(from > pos + width || to + width < pos) { i++; continue; }
+    if(active_selection == &i.value()) {
+      painter.setBrush(colActiveSelBg);
+      painter.setPen(colActiveSel);
+    } else {
+      painter.setBrush(colSelBg);
+      painter.setPen(colSel);
+    }
+    painter.drawRect(mapX(from), mapY(-1.0), mapX(to) - mapX(from), mapY(1.0) - mapY(-1.0));
+    painter.drawLine(mapX(from), mapY(0.0), mapX(from + fadein), mapY(-1.0));
+    painter.drawLine(mapX(from), mapY(0.0), mapX(from + fadein), mapY(1.0));
+    painter.drawLine(mapX(to - fadeout), mapY(-1.0), mapX(to), mapY(0.0));
+    painter.drawLine(mapX(to - fadeout), mapY(1.0), mapX(to), mapY(0.0));
+    i++;
+  }
+} 
+
+void Canvas::keyReleaseEvent(QKeyEvent *event)
+{
+  if(active_selection && event->key() == Qt::Key_Delete) {
+    _selections.remove(active_selection->from);
+    update();
+  }
+}
+
+void Canvas::setXScale(float scale)
+{
+  scale = (pow(100.0,scale) / 100.0) - (pow(100.0, 0.0)/ 100.0);
+  if(scale < 0.0) scale = 0.0;
+  if(scale > 1.0) scale = 1.0;
+  xscale = scale;
+  updateWav();
+  update();
+}
+
+void Canvas::setYScale(float scale)
+{ 
+  scale = (pow(100.0,scale) / 100.0) - (pow(100.0, 0.0)/ 100.0);
+  if(scale < 0.0) scale = 0.0;
+  if(scale > 1.0) scale = 1.0;
+  yscale = scale;
+  updateWav();
+  update();
+}
+
+void Canvas::setXOffset(float offset)
+{
+  if(offset < 0.0) offset = 0.0;
+  if(offset > 1.0) offset = 1.0;
+  xoffset = offset;
+  updateWav();
+  update();
+}
+
+void Canvas::setYOffset(float offset)
+{
+  if(offset < 0.0) offset = 0.0;
+  if(offset > 1.0) offset = 1.0;
+  yoffset = offset;
+  updateWav();
+  update();
+}
+
+void Canvas::autoCreateSelections()
+{
+  for(size_t i = 0; i < size; i++) {
+    if(fabs(data[i]) > fabs(threshold)) {
+      int from = i;
+
+      if(data[from] > 0.0) {
+        while(data[from] > data[from-1] // Falling
+              && data[from-1] > 0.0 // Not crossing zero
+              ) {
+          from--;
+        }
+      } else if(data[from] < 0.0) {
+        while(data[from] < data[from-1] // Rising
+              && data[from-1] < 0.0 // Not crossing zero
+              ) {
+          from--;
+        }
+      }
+
+      int to = i;
+      float runavg = fabs(data[to]);
+      while(runavg > 0.001 && to < (int)size) {
+        runavg = runavg * 0.99999 + fabs(data[to]) * 0.00001;
+        to++;
+      }
+      _selections[from] = Selection(from, to, 2, (to - from) / 3);
+
+      i = to+1;
+    }
+  }
+  update();
+}
+
+void Canvas::clearSelections()
+{
+  _selections.clear();
+  selection_is_moving_left = false;
+  selection_is_moving_right = false;
+  setCursor(Qt::ArrowCursor);
+  update();
+}
+
+Selections Canvas::selections()
+{
+  return _selections;
+}