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audacia/src/NoteTrack.cpp

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/**********************************************************************
Audacity: A Digital Audio Editor
NoteTrack.cpp
Dominic Mazzoni
*******************************************************************//*!
\class NoteTrack
\brief A Track that is used for Midi notes. (Somewhat old code).
*//*******************************************************************/
#include "Audacity.h"
#include "NoteTrack.h"
#include <wx/dc.h>
#include <wx/brush.h>
#include <wx/pen.h>
#include <wx/intl.h>
#if defined(USE_MIDI)
#include <sstream>
#define ROUND(x) ((int) ((x) + 0.5))
#include "AColor.h"
#include "DirManager.h"
#include "Internat.h"
#include "Prefs.h"
#include "effects/TimeWarper.h"
#include "Experimental.h"
#ifdef SONIFY
#include "portmidi.h"
#define SON_PROGRAM 0
#define SON_AutoSave 67
#define SON_ModifyState 60
#define SON_NoteBackground 72
#define SON_NoteForeground 74
#define SON_Measures 76 /* "bar line" */
#define SON_Serialize 77
#define SON_Unserialize 79
#define SON_VEL 100
PmStream *sonMidiStream;
bool sonificationStarted = false;
void SonifyBeginSonification()
{
PmError err = Pm_OpenOutput(&sonMidiStream, Pm_GetDefaultOutputDeviceID(),
NULL, 0, NULL, NULL, 0);
if (err) sonMidiStream = NULL;
if (sonMidiStream)
Pm_WriteShort(sonMidiStream, 0, Pm_Message(0xC0, SON_PROGRAM, 0));
sonificationStarted = true;
}
void SonifyEndSonification()
{
if (sonMidiStream) Pm_Close(sonMidiStream);
sonificationStarted = false;
}
void SonifyNoteOnOff(int p, int v)
{
if (!sonificationStarted)
SonifyBeginSonification();
if (sonMidiStream)
Pm_WriteShort(sonMidiStream, 0, Pm_Message(0x90, p, v));
}
#define SONFNS(name) \
void SonifyBegin ## name() { SonifyNoteOnOff(SON_ ## name, SON_VEL); } \
void SonifyEnd ## name() { SonifyNoteOnOff(SON_ ## name, 0); }
SONFNS(NoteBackground)
SONFNS(NoteForeground)
SONFNS(Measures)
SONFNS(Serialize)
SONFNS(Unserialize)
SONFNS(ModifyState)
SONFNS(AutoSave)
#undef SONFNS
#endif
NoteTrack::Holder TrackFactory::NewNoteTrack()
{
return std::make_unique<NoteTrack>(mDirManager);
}
NoteTrack::NoteTrack(DirManager * projDirManager):
Track(projDirManager)
{
SetDefaultName(_("Note Track"));
SetName(GetDefaultName());
mSeq = NULL;
mSerializationBuffer = NULL;
mSerializationLength = 0;
mDirManager = projDirManager;
#ifdef EXPERIMENTAL_MIDI_OUT
mGain = 0;
#endif
mBottomNote = 24;
mPitchHeight = 5;
mVisibleChannels = ALL_CHANNELS;
mLastMidiPosition = 0;
}
NoteTrack::~NoteTrack()
{
if (mSerializationBuffer) {
delete [] mSerializationBuffer;
}
}
Track::Holder NoteTrack::Duplicate() const
{
auto duplicate = std::make_unique<NoteTrack>(mDirManager);
duplicate->Init(*this);
// Duplicate on NoteTrack moves data from mSeq to mSerializationBuffer
// and from mSerializationBuffer to mSeq on alternate calls. Duplicate
// to the undo stack and Duplicate back to the project should result
// in serialized blobs on the undo stack and traversable data in the
// project object.
if (mSeq) {
SonifyBeginSerialize();
assert(!mSerializationBuffer);
// serialize from this to duplicate's mSerializationBuffer
mSeq->serialize((void**)&duplicate->mSerializationBuffer,
&duplicate->mSerializationLength);
SonifyEndSerialize();
} else if (mSerializationBuffer) {
SonifyBeginUnserialize();
assert(!mSeq);
std::unique_ptr<Alg_track> alg_track{ Alg_seq::unserialize(mSerializationBuffer,
mSerializationLength) };
assert(alg_track->get_type() == 's');
duplicate->mSeq.reset(static_cast<Alg_seq*>(alg_track.release()));
SonifyEndUnserialize();
} else assert(false); // bug if neither mSeq nor mSerializationBuffer
// copy some other fields here
duplicate->SetBottomNote(mBottomNote);
duplicate->SetPitchHeight(mPitchHeight);
duplicate->mLastMidiPosition = mLastMidiPosition;
duplicate->mVisibleChannels = mVisibleChannels;
duplicate->SetOffset(GetOffset());
#ifdef EXPERIMENTAL_MIDI_OUT
duplicate->SetGain(GetGain());
#endif
return std::move(duplicate);
}
double NoteTrack::GetOffset() const
{
return mOffset;
}
double NoteTrack::GetStartTime() const
{
return GetOffset();
}
double NoteTrack::GetEndTime() const
{
return GetStartTime() + (mSeq ? mSeq->get_real_dur() : 0.0);
}
void NoteTrack::WarpAndTransposeNotes(double t0, double t1,
const TimeWarper &warper,
double semitones)
{
// Since this is a duplicate and duplicates convert mSeq to
// a text string for saving as XML, we probably have to
// duplicate again to get back an mSeq
double offset = this->GetOffset(); // track is shifted this amount
if (!mSeq) { // replace saveme with an (unserialized) duplicate
Track::Holder unt{ Duplicate() };
const auto nt = static_cast<NoteTrack*>(unt.get());
wxASSERT(!mSeq && nt->mSeq && !nt->mSerializationBuffer);
// swap mSeq and Buffer between this and nt
nt->mSerializationBuffer = mSerializationBuffer;
nt->mSerializationLength = mSerializationLength;
mSerializationBuffer = NULL;
mSerializationLength = 0;
mSeq = std::move(nt->mSeq);
}
mSeq->convert_to_seconds(); // make sure time units are right
t1 -= offset; // adjust time range to compensate for track offset
t0 -= offset;
if (t1 > mSeq->get_dur()) { // make sure t0, t1 are within sequence
t1 = mSeq->get_dur();
if (t0 >= t1) return;
}
Alg_iterator iter(mSeq.get(), false);
iter.begin();
Alg_event_ptr event;
while (0 != (event = iter.next()) && event->time < t1) {
if (event->is_note() && event->time >= t0 &&
// Allegro data structure does not restrict channels to 16.
// Since there is not way to select more than 16 channels,
// map all channel numbers mod 16. This will have no effect
// on MIDI files, but it will allow users to at least select
// all channels on non-MIDI event sequence data.
IsVisibleChan(event->chan % 16)) {
event->set_pitch(event->get_pitch() + semitones);
}
}
iter.end();
// now, use warper to warp the tempo map
mSeq->convert_to_beats(); // beats remain the same
Alg_time_map_ptr map = mSeq->get_time_map();
map->insert_beat(t0, map->time_to_beat(t0));
map->insert_beat(t1, map->time_to_beat(t1));
int i, len = map->length();
for (i = 0; i < len; i++) {
Alg_beat &beat = map->beats[i];
beat.time = warper.Warp(beat.time + offset) - offset;
}
// about to redisplay, so might as well convert back to time now
mSeq->convert_to_seconds();
}
int NoteTrack::DrawLabelControls(wxDC & dc, wxRect & r)
{
int wid = 23;
int ht = 16;
if (r.height < ht * 4) {
return r.y + 5 + ht * 4;
}
int x = r.x + (r.width / 2 - wid * 2) + 2;
int y = r.y + 5;
wxRect box;
for (int row = 0; row < 4; row++) {
for (int col = 0; col < 4; col++) {
// chanName is the "external" channel number (1-16)
// used by AColor and button labels
int chanName = row * 4 + col + 1;
box.x = x + col * wid;
box.y = y + row * ht;
box.width = wid;
box.height = ht;
if (IsVisibleChan(chanName - 1)) {
AColor::MIDIChannel(&dc, chanName);
dc.DrawRectangle(box);
// two choices: channel is enabled (to see and play) when button is in
// "up" position (original Audacity style) or in "down" position
//
#define CHANNEL_ON_IS_DOWN 1
#if CHANNEL_ON_IS_DOWN
AColor::DarkMIDIChannel(&dc, chanName);
#else
AColor::LightMIDIChannel(&dc, chanName);
#endif
AColor::Line(dc, box.x, box.y, box.x + box.width - 1, box.y);
AColor::Line(dc, box.x, box.y, box.x, box.y + box.height - 1);
#if CHANNEL_ON_IS_DOWN
AColor::LightMIDIChannel(&dc, chanName);
#else
AColor::DarkMIDIChannel(&dc, chanName);
#endif
AColor::Line(dc,
box.x + box.width - 1, box.y,
box.x + box.width - 1, box.y + box.height - 1);
AColor::Line(dc,
box.x, box.y + box.height - 1,
box.x + box.width - 1, box.y + box.height - 1);
} else {
AColor::MIDIChannel(&dc, 0);
dc.DrawRectangle(box);
#if CHANNEL_ON_IS_DOWN
AColor::LightMIDIChannel(&dc, 0);
#else
AColor::DarkMIDIChannel(&dc, 0);
#endif
AColor::Line(dc, box.x, box.y, box.x + box.width - 1, box.y);
AColor::Line(dc, box.x, box.y, box.x, box.y + box.height - 1);
#if CHANNEL_ON_IS_DOWN
AColor::DarkMIDIChannel(&dc, 0);
#else
AColor::LightMIDIChannel(&dc, 0);
#endif
AColor::Line(dc,
box.x + box.width - 1, box.y,
box.x + box.width - 1, box.y + box.height - 1);
AColor::Line(dc,
box.x, box.y + box.height - 1,
box.x + box.width - 1, box.y + box.height - 1);
}
wxString t;
wxCoord w;
wxCoord h;
t.Printf(wxT("%d"), chanName);
dc.GetTextExtent(t, &w, &h);
dc.DrawText(t, box.x + (box.width - w) / 2, box.y + (box.height - h) / 2);
}
}
AColor::MIDIChannel(&dc, 0); // always return with gray color selected
return box.GetBottom();
}
bool NoteTrack::LabelClick(wxRect & r, int mx, int my, bool right)
{
int wid = 23;
int ht = 16;
if (r.height < ht * 4)
return false;
int x = r.x + (r.width / 2 - wid * 2);
int y = r.y + 1;
// after adding Mute and Solo buttons, mapping is broken, so hack in the offset
y += 12;
int col = (mx - x) / wid;
int row = (my - y) / ht;
if (row < 0 || row >= 4 || col < 0 || col >= 4)
return false;
int channel = row * 4 + col;
if (right) {
if (mVisibleChannels == CHANNEL_BIT(channel))
mVisibleChannels = ALL_CHANNELS;
else
mVisibleChannels = CHANNEL_BIT(channel);
} else
ToggleVisibleChan(channel);
return true;
}
void NoteTrack::SetSequence(std::unique_ptr<Alg_seq> &&seq)
{
mSeq = std::move(seq);
}
Alg_seq* NoteTrack::GetSequence()
{
return mSeq.get();
}
void NoteTrack::PrintSequence()
{
FILE *debugOutput;
debugOutput = fopen("debugOutput.txt", "wt");
fprintf(debugOutput, "Importing MIDI...\n");
if (mSeq) {
int i = 0;
while(i < mSeq->length()) {
fprintf(debugOutput, "--\n");
fprintf(debugOutput, "type: %c\n",
((Alg_event_ptr)mSeq->track_list.tracks[i])->get_type());
fprintf(debugOutput, "time: %f\n",
((Alg_event_ptr)mSeq->track_list.tracks[i])->time);
fprintf(debugOutput, "channel: %li\n",
((Alg_event_ptr)mSeq->track_list.tracks[i])->chan);
if(((Alg_event_ptr)mSeq->track_list.tracks[i])->get_type() == wxT('n'))
{
fprintf(debugOutput, "pitch: %f\n",
((Alg_note_ptr)mSeq->track_list.tracks[i])->pitch);
fprintf(debugOutput, "duration: %f\n",
((Alg_note_ptr)mSeq->track_list.tracks[i])->dur);
fprintf(debugOutput, "velocity: %f\n",
((Alg_note_ptr)mSeq->track_list.tracks[i])->loud);
}
else if(((Alg_event_ptr)mSeq->track_list.tracks[i])->get_type() == wxT('n'))
{
fprintf(debugOutput, "key: %li\n", ((Alg_update_ptr)mSeq->track_list.tracks[i])->get_identifier());
fprintf(debugOutput, "attribute type: %c\n", ((Alg_update_ptr)mSeq->track_list.tracks[i])->parameter.attr_type());
fprintf(debugOutput, "attribute: %s\n", ((Alg_update_ptr)mSeq->track_list.tracks[i])->parameter.attr_name());
if(((Alg_update_ptr)mSeq->track_list.tracks[i])->parameter.attr_type() == wxT('r'))
{
fprintf(debugOutput, "value: %f\n", ((Alg_update_ptr)mSeq->track_list.tracks[i])->parameter.r);
}
else if(((Alg_update_ptr)mSeq->track_list.tracks[i])->parameter.attr_type() == wxT('i')) {
fprintf(debugOutput, "value: %li\n", ((Alg_update_ptr)mSeq->track_list.tracks[i])->parameter.i);
}
else if(((Alg_update_ptr)mSeq->track_list.tracks[i])->parameter.attr_type() == wxT('s')) {
fprintf(debugOutput, "value: %s\n", ((Alg_update_ptr)mSeq->track_list.tracks[i])->parameter.s);
}
else {}
}
i++;
}
}
else {
fprintf(debugOutput, "No sequence defined!\n");
}
fclose(debugOutput);
}
int NoteTrack::GetVisibleChannels()
{
return mVisibleChannels;
}
Track::Holder NoteTrack::Cut(double t0, double t1)
{
if (t1 <= t0)
return{};
double len = t1-t0;
auto newTrack = std::make_unique<NoteTrack>(mDirManager);
newTrack->Init(*this);
mSeq->convert_to_seconds();
newTrack->mSeq.reset(mSeq->cut(t0 - GetOffset(), len, false));
newTrack->SetOffset(GetOffset());
// What should be done with the rest of newTrack's members?
//(mBottomNote, mDirManager, mLastMidiPosition,
// mSerializationBuffer, mSerializationLength, mVisibleChannels)
return std::move(newTrack);
}
Track::Holder NoteTrack::Copy(double t0, double t1) const
{
if (t1 <= t0)
return{};
double len = t1-t0;
auto newTrack = std::make_unique<NoteTrack>(mDirManager);
newTrack->Init(*this);
mSeq->convert_to_seconds();
newTrack->mSeq.reset(mSeq->copy(t0 - GetOffset(), len, false));
newTrack->SetOffset(GetOffset());
// What should be done with the rest of newTrack's members?
//(mBottomNote, mDirManager, mLastMidiPosition,
// mSerializationBuffer, mSerializationLength, mVisibleChannels)
return std::move(newTrack);
}
bool NoteTrack::Trim(double t0, double t1)
{
if (t1 <= t0)
return false;
mSeq->convert_to_seconds();
// DELETE way beyond duration just in case something is out there:
mSeq->clear(t1 - GetOffset(), mSeq->get_dur() + 10000.0, false);
// Now that stuff beyond selection is cleared, clear before selection:
mSeq->clear(0.0, t0 - GetOffset(), false);
// want starting time to be t0
SetOffset(t0);
return true;
}
bool NoteTrack::Clear(double t0, double t1)
{
// If t1 = t0, should Clear return true?
if (t1 <= t0)
return false;
double len = t1-t0;
mSeq->clear(t0 - GetOffset(), len, false);
return true;
}
bool NoteTrack::Paste(double t, const Track *src)
{
// Paste inserts src at time t. If src has a positive offset,
// the offset is treated as silence which is also inserted. If
// the offset is negative, the offset is ignored and the ENTIRE
// src is inserted (otherwise, we would either lose data from
// src by not inserting things at negative times, or inserting
// things at negative times could overlap things already in
// the destination track).
//Check that src is a non-NULL NoteTrack
if (src == NULL || src->GetKind() != Track::Note)
return false;
NoteTrack* other = (NoteTrack*)src;
if (other->mSeq == NULL)
return false;
if(!mSeq)
mSeq = std::make_unique<Alg_seq>();
if (other->GetOffset() > 0) {
mSeq->convert_to_seconds();
mSeq->insert_silence(t - GetOffset(), other->GetOffset());
t += other->GetOffset();
}
mSeq->paste(t - GetOffset(), other->mSeq.get());
return true;
}
// Call this function to manipulate the underlying sequence data. This is
// NOT the function that handles horizontal dragging.
bool NoteTrack::Shift(double t) // t is always seconds
{
if (t > 0) {
// insert an even number of measures
mSeq->convert_to_beats();
// get initial tempo
double tempo = mSeq->get_tempo(0.0);
double beats_per_measure = mSeq->get_bar_len(0.0);
int m = ROUND(t * tempo / beats_per_measure);
// need at least 1 measure, so if we rounded down to zero, fix it
if (m == 0) m = 1;
// compute NEW tempo so that m measures at NEW tempo take t seconds
tempo = beats_per_measure * m / t; // in beats per second
mSeq->insert_silence(0.0, beats_per_measure * m);
mSeq->set_tempo(tempo * 60.0 /* bpm */, 0.0, beats_per_measure * m);
mSeq->write("afterShift.gro");
} else if (t < 0) {
mSeq->convert_to_seconds();
mSeq->clear(0, t, true);
} else { // offset is zero, no modifications
return false;
}
return true;
}
double NoteTrack::NearestBeatTime(double time, double *beat)
{
wxASSERT(mSeq);
// Alg_seq knows nothing about offset, so remove offset time
double seq_time = time - GetOffset();
seq_time = mSeq->nearest_beat_time(seq_time, beat);
// add the offset back in to get "actual" audacity track time
return seq_time + GetOffset();
}
bool NoteTrack::StretchRegion(double t0, double t1, double dur)
{
wxASSERT(mSeq);
// Alg_seq::stretch_region uses beats, so we translate time
// to beats first:
t0 -= GetOffset();
t1 -= GetOffset();
double b0 = mSeq->get_time_map()->time_to_beat(t0);
double b1 = mSeq->get_time_map()->time_to_beat(t1);
bool result = mSeq->stretch_region(b0, b1, dur);
if (result) {
mSeq->convert_to_seconds();
mSeq->set_dur(mSeq->get_dur() + dur - (t1 - t0));
}
return result;
}
namespace
{
void swap(std::unique_ptr<Alg_seq> &a, std::unique_ptr<Alg_seq> &b)
{
std::unique_ptr<Alg_seq> tmp = std::move(a);
a = std::move(b);
b = std::move(tmp);
}
}
Alg_seq *NoteTrack::MakeExportableSeq(std::unique_ptr<Alg_seq> &cleanup)
{
cleanup.reset();
double offset = GetOffset();
if (offset == 0)
return mSeq.get();
// make a copy, deleting events that are shifted before time 0
double start = -offset;
if (start < 0) start = 0;
// notes that begin before "start" are not included even if they
// extend past "start" (because "all" parameter is set to false)
cleanup.reset( mSeq->copy(start, mSeq->get_dur() - start, false) );
auto seq = cleanup.get();
if (offset > 0) {
// swap cleanup and mSeq so that Shift operates on the NEW copy
swap(mSeq, cleanup);
Shift(offset);
swap(mSeq, cleanup); // undo the swap
#ifdef OLD_CODE
// now shift events by offset. This must be done with an integer
// number of measures, so first, find the beats-per-measure
double beats_per_measure = 4.0;
Alg_time_sig_ptr tsp = NULL;
if (seq->time_sig.length() > 0 && seq->time_sig[0].beat < ALG_EPS) {
// there is an initial time signature
tsp = &(seq->time_sig[0]);
beats_per_measure = (tsp->num * 4) / tsp->den;
}
// also need the initial tempo
double bps = ALG_DEFAULT_BPM / 60;
Alg_time_map_ptr map = seq->get_time_map();
Alg_beat_ptr bp = &(map->beats[0]);
if (bp->time < ALG_EPS) { // tempo change at time 0
if (map->beats.len > 1) { // compute slope to get tempo
bps = (map->beats[1].beat - map->beats[0].beat) /
(map->beats[1].time - map->beats[0].time);
} else if (seq->get_time_map()->last_tempo_flag) {
bps = seq->get_time_map()->last_tempo;
}
}
// find closest number of measures to fit in the gap
// number of measures is offset / measure_time
double measure_time = beats_per_measure / bps; // seconds per measure
int n = ROUND(offset / measure_time);
if (n == 0) n = 1;
// we will insert n measures. Compute the desired duration of each.
measure_time = offset / n;
bps = beats_per_measure / measure_time;
// insert integer multiple of measures at beginning
seq->convert_to_beats();
seq->insert_silence(0, beats_per_measure * n);
// make sure time signature at 0 is correct
if (tsp) {
seq->set_time_sig(0, tsp->num, tsp->den);
}
// adjust tempo to match offset
seq->set_tempo(bps * 60.0, 0, beats_per_measure * n);
#endif
} else {
// if offset is negative, it might not be a multiple of beats, but
// we want to preserve the relative positions of measures. I.e. we
// should shift barlines and time signatures as well as notes.
// Insert a time signature at the first bar-line if necessary.
// Translate start from seconds to beats and call it beat:
double beat = mSeq->get_time_map()->time_to_beat(start);
// Find the time signature in mSeq in effect at start (beat):
int i = mSeq->time_sig.find_beat(beat);
// i is where you would insert a NEW time sig at beat,
// Case 1: beat coincides with a time sig at i. Time signature
// at beat means that there is a barline at beat, so when beat
// is shifted to 0, the relative barline positions are preserved
if (mSeq->time_sig.length() > 0 &&
within(beat, mSeq->time_sig[i].beat, ALG_EPS)) {
// beat coincides with time signature change, so offset must
// be a multiple of beats
/* do nothing */ ;
// Case 2: there is no time signature before beat.
} else if (i == 0 && (mSeq->time_sig.length() == 0 ||
mSeq->time_sig[i].beat > beat)) {
// If beat does not fall on an implied barline, we need to
// insert a time signature.
double measures = beat / 4.0;
double imeasures = ROUND(measures);
if (!within(measures, imeasures, ALG_EPS)) {
double bar_offset = (int(measures) + 1) * 4.0 - beat;
seq->set_time_sig(bar_offset, 4, 4);
}
// This case should never be true because if i == 0, either there
// are no time signatures before beat (Case 2),
// or there is one time signature at beat (Case 1)
} else if (i == 0) {
/* do nothing (might be good to assert(false)) */ ;
// Case 3: i-1 must be the effective time sig position
} else {
i -= 1; // index the time signature in effect at beat
Alg_time_sig_ptr tsp = &(mSeq->time_sig[i]);
double beats_per_measure = (tsp->num * 4) / tsp->den;
double measures = (beat - tsp->beat) / beats_per_measure;
int imeasures = ROUND(measures);
if (!within(measures, imeasures, ALG_EPS)) {
// beat is not on a measure, so we need to insert a time sig
// to force a bar line at the first measure location after
// beat
double bar = tsp->beat + beats_per_measure * (int(measures) + 1);
double bar_offset = bar - beat;
// insert NEW time signature at bar_offset in NEW sequence
// It will have the same time signature, but the position will
// force a barline to match the barlines in mSeq
seq->set_time_sig(bar_offset, tsp->num, tsp->den);
}
// else beat coincides with a barline, so no need for an extra
// time signature to force barline alignment
}
}
return seq;
}
bool NoteTrack::ExportMIDI(const wxString &f)
{
std::unique_ptr<Alg_seq> cleanup;
auto seq = MakeExportableSeq(cleanup);
bool rslt = seq->smf_write(f.mb_str());
return rslt;
}
bool NoteTrack::ExportAllegro(const wxString &f)
{
double offset = GetOffset();
bool in_seconds;
gPrefs->Read(wxT("/FileFormats/AllegroStyle"), &in_seconds, true);
if (in_seconds) {
mSeq->convert_to_seconds();
} else {
mSeq->convert_to_beats();
}
return mSeq->write(f.mb_str(), offset);
}
bool NoteTrack::HandleXMLTag(const wxChar *tag, const wxChar **attrs)
{
if (!wxStrcmp(tag, wxT("notetrack"))) {
while (*attrs) {
const wxChar *attr = *attrs++;
const wxChar *value = *attrs++;
if (!value)
break;
const wxString strValue = value;
long nValue;
double dblValue;
if (!wxStrcmp(attr, wxT("name")) && XMLValueChecker::IsGoodString(strValue))
mName = strValue;
else if (!wxStrcmp(attr, wxT("offset")) &&
XMLValueChecker::IsGoodString(strValue) &&
Internat::CompatibleToDouble(strValue, &dblValue))
SetOffset(dblValue);
else if (!wxStrcmp(attr, wxT("visiblechannels"))) {
if (!XMLValueChecker::IsGoodInt(strValue) ||
!strValue.ToLong(&nValue) ||
!XMLValueChecker::IsValidVisibleChannels(nValue))
return false;
mVisibleChannels = nValue;
}
else if (!wxStrcmp(attr, wxT("height")) &&
XMLValueChecker::IsGoodInt(strValue) && strValue.ToLong(&nValue))
mHeight = nValue;
else if (!wxStrcmp(attr, wxT("minimized")) &&
XMLValueChecker::IsGoodInt(strValue) && strValue.ToLong(&nValue))
mMinimized = (nValue != 0);
else if (!wxStrcmp(attr, wxT("isSelected")) &&
XMLValueChecker::IsGoodInt(strValue) && strValue.ToLong(&nValue))
this->SetSelected(nValue != 0);
#ifdef EXPERIMENTAL_MIDI_OUT
else if (!wxStrcmp(attr, wxT("velocity")) &&
XMLValueChecker::IsGoodString(strValue) &&
Internat::CompatibleToDouble(strValue, &dblValue))
mGain = (float) dblValue;
#endif
else if (!wxStrcmp(attr, wxT("bottomnote")) &&
XMLValueChecker::IsGoodInt(strValue) && strValue.ToLong(&nValue))
SetBottomNote(nValue);
else if (!wxStrcmp(attr, wxT("data"))) {
std::string s(strValue.mb_str(wxConvUTF8));
std::istringstream data(s);
mSeq = std::make_unique<Alg_seq>(data, false);
}
} // while
return true;
}
return false;
}
XMLTagHandler *NoteTrack::HandleXMLChild(const wxChar * WXUNUSED(tag))
{
return NULL;
}
void NoteTrack::WriteXML(XMLWriter &xmlFile)
{
std::ostringstream data;
// Normally, Duplicate is called in pairs -- once to put NoteTrack
// on the Undo stack, and again to move from the Undo stack to an
// "active" editable state. For efficiency, we do not do a "real"
// Duplicate followed by serialization into a binary blob. Instead,
// we combine the Duplicate with serialization or unserialization.
// Serialization and Unserialization happen on alternate calls to
// Duplicate and (usually) produce the right results at the right
// time.
// It turns out that this optimized Duplicate is a little too
// clever. There is at least one case where a track can be duplicated
// and then AutoSave'd. (E.g. do an "Insert Silence" effect on a
// NoteTrack.) In this case, mSeq will be NULL. To avoid a crash
// and perform WriteXML, we may need to restore NoteTracks from binary
// blobs to regular data structures (with an Alg_seq member).
Track::Holder holder;
NoteTrack *saveme = this;
if (!mSeq) { // replace saveme with an (unserialized) duplicate
holder = Duplicate();
saveme = static_cast<NoteTrack*>(holder.get());
assert(saveme->mSeq);
}
saveme->mSeq->write(data, true);
xmlFile.StartTag(wxT("notetrack"));
xmlFile.WriteAttr(wxT("name"), saveme->mName);
xmlFile.WriteAttr(wxT("offset"), saveme->GetOffset());
xmlFile.WriteAttr(wxT("visiblechannels"), saveme->mVisibleChannels);
xmlFile.WriteAttr(wxT("height"), saveme->GetActualHeight());
xmlFile.WriteAttr(wxT("minimized"), saveme->GetMinimized());
xmlFile.WriteAttr(wxT("isSelected"), this->GetSelected());
#ifdef EXPERIMENTAL_MIDI_OUT
xmlFile.WriteAttr(wxT("velocity"), (double) saveme->mGain);
#endif
xmlFile.WriteAttr(wxT("bottomnote"), saveme->mBottomNote);
xmlFile.WriteAttr(wxT("data"), wxString(data.str().c_str(), wxConvUTF8));
xmlFile.EndTag(wxT("notetrack"));
}
void NoteTrack::StartVScroll()
{
mStartBottomNote = mBottomNote;
}
void NoteTrack::VScroll(int start, int end)
{
int ph = GetPitchHeight();
int delta = ((end - start) + ph / 2) / ph;
SetBottomNote(mStartBottomNote + delta);
}
// Zoom the note track, centering the pitch at centerY,
// amount is 1 for zoom in, and -1 for zoom out
void NoteTrack::Zoom(int centerY, int amount)
{
// Construct track rectangle to map pitch to screen coordinates
// Only y and height are needed:
wxRect trackRect(0, GetY(), 1, GetHeight());
PrepareIPitchToY(trackRect);
int centerPitch = YToIPitch(centerY);
// zoom out by changing the pitch height -- a small integer
mPitchHeight += amount;
if (mPitchHeight <= 0) mPitchHeight = 1;
PrepareIPitchToY(trackRect); // update because mPitchHeight changed
int newCenterPitch = YToIPitch(GetY() + GetHeight() / 2);
// center the pitch that the user clicked on
SetBottomNote(mBottomNote + (centerPitch - newCenterPitch));
}
void NoteTrack::ZoomTo(int start, int end)
{
wxRect trackRect(0, GetY(), 1, GetHeight());
PrepareIPitchToY(trackRect);
int topPitch = YToIPitch(start);
int botPitch = YToIPitch(end);
if (topPitch < botPitch) { // swap
int temp = topPitch; topPitch = botPitch; botPitch = temp;
}
if (topPitch == botPitch) { // can't divide by zero, do something else
Zoom(start, 1);
return;
}
int trialPitchHeight = trackRect.height / (topPitch - botPitch);
if (trialPitchHeight > 25) { // keep mPitchHeight in bounds [1...25]
trialPitchHeight = 25;
} else if (trialPitchHeight == 0) {
trialPitchHeight = 1;
}
Zoom((start + end) / 2, trialPitchHeight - mPitchHeight);
}
int NoteTrack::YToIPitch(int y)
{
y = mBottom - y; // pixels above pitch 0
int octave = (y / GetOctaveHeight());
y -= octave * GetOctaveHeight();
// result is approximate because C and G are one pixel taller than
// mPitchHeight.
return (y / mPitchHeight) + octave * 12;
}
#endif // USE_MIDI
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