mirror of
https://github.com/cookiengineer/audacity
synced 2026-02-05 03:03:10 +01:00
Locate and position the current Audacity source code, and clear a variety of old junk out of the way into junk-branches
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ra
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src/TimeTrack.cpp
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269
src/TimeTrack.cpp
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/**********************************************************************
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Audacity: A Digital Audio Editor
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TimeTrack.cpp
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Dr William Bland
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*******************************************************************//*!
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\class TimeTrack
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\brief A kind of Track used to 'warp time'
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*//*******************************************************************/
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#include <wx/intl.h>
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#include "Audacity.h"
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#include "AColor.h"
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#include "TimeTrack.h"
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#include "widgets/Ruler.h"
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#include "Prefs.h"
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#include "Internat.h"
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#include "Resample.h"
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TimeTrack *TrackFactory::NewTimeTrack()
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{
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return new TimeTrack(mDirManager);
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}
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TimeTrack::TimeTrack(DirManager *projDirManager):
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Track(projDirManager)
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{
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mHeight = 50;
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mRangeLower = 90;
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mRangeUpper = 110;
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mEnvelope = new Envelope();
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mEnvelope->SetTrackLen(1000000000.0);
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mEnvelope->SetInterpolateDB(false);
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mEnvelope->Flatten(0.5);
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mEnvelope->Mirror(false);
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SetDefaultName(_("Time Track"));
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SetName(GetDefaultName());
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mRuler = new Ruler();
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mRuler->SetLabelEdges(false);
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mRuler->SetFormat(Ruler::TimeFormat);
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blankBrush.SetColour(214, 214, 214);
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blankPen.SetColour(214, 214, 214);
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}
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TimeTrack::TimeTrack(TimeTrack &orig):
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Track(orig)
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{
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Init(orig);
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mHeight = 50;
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mRangeLower = 90;
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mRangeUpper = 110;
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mEnvelope = new Envelope();
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mEnvelope->SetTrackLen(1000000000.0);
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mEnvelope->SetInterpolateDB(false);
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mEnvelope->Flatten(0.5);
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mEnvelope->Mirror(false);
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mEnvelope->Paste(0.0, orig.mEnvelope);
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mEnvelope->SetOffset(0);
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mRuler = new Ruler();
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mRuler->SetLabelEdges(false);
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mRuler->SetFormat(Ruler::TimeFormat);
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blankBrush.SetColour(214, 214, 214);
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blankPen.SetColour(214, 214, 214);
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}
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// Copy the track metadata but not the contents.
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void TimeTrack::Init(const TimeTrack &orig)
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{
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Track::Init(orig);
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SetDefaultName(orig.GetDefaultName());
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SetName(orig.GetName());
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}
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TimeTrack::~TimeTrack()
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{
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delete mEnvelope;
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delete mRuler;
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}
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Track *TimeTrack::Duplicate()
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{
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return new TimeTrack(*this);
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}
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// Our envelope represents the playback speed, which is the rate of change of
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// playback position. We want to find the playback position at time t, so
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// we have to integrate the playback speed.
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double TimeTrack::warp( double t )
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{
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double result = GetEnvelope()->Integral( 0.0, t,
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GetRangeLower()/100.0,
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GetRangeUpper()/100.0 );
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//printf( "Warping %.2f to %.2f\n", t, result );
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return result;
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}
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bool TimeTrack::HandleXMLTag(const wxChar *tag, const wxChar **attrs)
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{
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if (!wxStrcmp(tag, wxT("timetrack"))) {
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double dblValue;
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long nValue;
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while(*attrs) {
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const wxChar *attr = *attrs++;
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const wxChar *value = *attrs++;
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if (!value)
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break;
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const wxString strValue = value;
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if (!wxStrcmp(attr, wxT("offset")))
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{
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if (!XMLValueChecker::IsGoodString(strValue) ||
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!Internat::CompatibleToDouble(strValue, &dblValue))
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return false;
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mOffset = dblValue;
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mEnvelope->SetOffset(mOffset);
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}
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else if (!wxStrcmp(attr, wxT("name")) && XMLValueChecker::IsGoodString(strValue))
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mName = strValue;
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else if (!wxStrcmp(attr, wxT("channel")))
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{
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if (!XMLValueChecker::IsGoodInt(strValue) || !strValue.ToLong(&nValue) ||
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!XMLValueChecker::IsValidChannel(nValue))
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return false;
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mChannel = nValue;
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}
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else if (!wxStrcmp(attr, wxT("height")) &&
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XMLValueChecker::IsGoodInt(strValue) && strValue.ToLong(&nValue))
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mHeight = nValue;
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else if (!wxStrcmp(attr, wxT("minimized")) &&
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XMLValueChecker::IsGoodInt(strValue) && strValue.ToLong(&nValue))
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mMinimized = (nValue != 0);
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} // while
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return true;
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}
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return false;
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}
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XMLTagHandler *TimeTrack::HandleXMLChild(const wxChar *tag)
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{
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if (!wxStrcmp(tag, wxT("envelope")))
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return mEnvelope;
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return NULL;
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}
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void TimeTrack::WriteXML(XMLWriter &xmlFile)
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{
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xmlFile.StartTag(wxT("timetrack"));
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xmlFile.WriteAttr(wxT("name"), mName);
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xmlFile.WriteAttr(wxT("channel"), mChannel);
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xmlFile.WriteAttr(wxT("offset"), mOffset, 8);
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xmlFile.WriteAttr(wxT("height"), this->GetActualHeight());
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xmlFile.WriteAttr(wxT("minimized"), this->GetMinimized());
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mEnvelope->WriteXML(xmlFile);
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xmlFile.EndTag(wxT("timetrack"));
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}
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void TimeTrack::Draw(wxDC & dc, const wxRect & r, double h, double pps)
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{
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double tstep = 1.0 / pps; // Seconds per point
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double t0 = h;
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double t1 = h + (r.width * tstep);
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//Make sure t1 (the right bound) is greater than 0
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if (t1 < 0.0)
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t1 = 0.0;
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//make sure t1 is greater than t0
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if (t0 > t1)
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t0 = t1;
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dc.SetBrush(blankBrush);
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dc.SetPen(blankPen);
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dc.DrawRectangle(r);
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//copy this rectangle away for future use.
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wxRect mid = r;
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// Draw the Ruler
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mRuler->SetBounds(r.x, r.y, r.x + r.width - 1, r.y + r.height - 1);
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double min = t0;
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double max = min + r.width / pps;
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mRuler->SetRange(min, max);
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mRuler->SetFlip(false); // If we don't do this, the Ruler doesn't redraw itself when the envelope is modified.
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// I have no idea why!
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//
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// LL: It's because the ruler only Invalidate()s when the new value is different
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// than the current value.
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mRuler->SetFlip(GetHeight() > 75 ? true : true);
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mRuler->Draw(dc, GetEnvelope(), GetRangeLower(), GetRangeUpper());
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int *heights = new int[mid.width];
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double *envValues = new double[mid.width];
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GetEnvelope()->GetValues(envValues, mid.width, t0, tstep);
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double t = t0;
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int x;
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for (x = 0; x < mid.width; x++)
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{
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heights[x] = (int)(mid.height * (1 - envValues[x]));
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t += tstep;
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}
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dc.SetPen(AColor::envelopePen);
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for (x = 0; x < mid.width; x++)
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{
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int thisy = r.y + heights[x];
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AColor::Line(dc, mid.x + x, thisy, mid.x + x, thisy+3);
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}
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if (heights)
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delete[]heights;
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if (envValues)
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delete[]envValues;
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}
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void TimeTrack::testMe()
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{
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GetEnvelope()->SetDefaultValue(0.5);
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GetEnvelope()->Flatten(0.0);
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GetEnvelope()->Insert( 0.0, 0.0 );
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GetEnvelope()->Insert( 5.0, 1.0 );
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GetEnvelope()->Insert( 10.0, 0.0 );
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double reqt0 = 10.0 - .1;
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double reqt1 = 10.0 + .1;
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double t0 = warp( reqt0 );
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double t1 = warp( reqt1 );
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if( t0 > t1 )
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{
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printf( "TimeTrack: Warping reverses an interval! [%.2f,%.2f] -> [%.2f,%.2f]\n",
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reqt0, reqt1,
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t0, t1 );
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}
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}
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// Indentation settings for Vim and Emacs and unique identifier for Arch, a
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// version control system. Please do not modify past this point.
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//
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// Local Variables:
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// c-basic-offset: 3
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// indent-tabs-mode: nil
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// End:
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//
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// vim: et sts=3 sw=3
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// arch-tag: 8622daf1-c09a-4dcd-8b71-615d194343c7
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