melrōse musical expression player

package img import ( "testing" "time" "github.com/emicklei/melrose/core" "github.com/emicklei/melrose/midi" "github.com/emicklei/melrose/op" "github.com/fogleman/gg" ) func sampleTimeline() *core.Timeline { tim := core.NewTimeline() now := time.Now() tim.Schedule(core.NewNoteChange(true, 21, 1), now.Add(0*time.Second)) tim.Schedule(core.NewNoteChange(false, 21, 1), now.Add(1*time.Second)) tim.Schedule(core.NewNoteChange(true, 21, 1), now.Add(3*time.Second)) tim.Schedule(core.NewNoteChange(true, 22, 1), now.Add(4*time.Second)) tim.Schedule(core.NewNoteChange(false, 22, 1), now.Add(5*time.Second)) tim.Schedule(core.NewNoteChange(false, 21, 1), now.Add(6*time.Second)) tim.Schedule(core.NewNoteChange(true, 21, 1), now.Add(8*time.Second)) tim.Schedule(core.NewNoteChange(true, 23, 1), now.Add(9*time.Second)) tim.Schedule(core.NewNoteChange(false, 21, 1), now.Add(10*time.Second)) tim.Schedule(core.NewNoteChange(false, 23, 1), now.Add(11*time.Second)) tim.Schedule(core.NewNoteChange(true, 21, 1), now.Add(13*time.Second)) tim.Schedule(core.NewNoteChange(true, 24, 1), now.Add(14*time.Second)) tim.Schedule(core.NewNoteChange(false, 21, 1), now.Add(15*time.Second)) tim.Schedule(core.NewNoteChange(false, 24, 1), now.Add(15*time.Second)) tim.Schedule(core.NewNoteChange(true, 21, 1), now.Add(17*time.Second)) tim.Schedule(core.NewNoteChange(true, 25, 1), now.Add(17*time.Second)) tim.Schedule(core.NewNoteChange(false, 25, 1), now.Add(18*time.Second)) tim.Schedule(core.NewNoteChange(false, 21, 1), now.Add(19*time.Second)) return tim.ZeroStarting() } func TestDraw(t *testing.T) { tl := sampleTimeline() gc := gg.NewContext(1000, 150) evts := tl.NoteEvents() nv := NotesView{Events: evts, BPM: 10.0} nv.DrawOn(gc) gc.SavePNG("TestDraw.png") } func TestRecordedTimeline(t *testing.T) { t.Skip("TODO put recorded file in testdata") bpm := 120.0 // TODO stored from control/recording.go:54 events := core.NoteEventsFromFile("/tmp/melrose-recording.json") t.Log("event count:", len(events)) gc := gg.NewContext(1000, 100) nv := NotesView{Events: events, BPM: bpm} nv.DrawOn(gc) gc.SavePNG("TestRecorded_RAW.png") { periods := core.NoteEventsToPeriods(events) b := core.NewSequenceBuilder(periods, bpm) seq := b.Build() t.Log(seq) tim := core.NewTimeline() d := midi.NewOutputDevice(0, nil, 0, tim) d.Play(core.NoCondition, seq, bpm, time.Now()) gc := gg.NewContext(500, 50) nv := NotesView{Events: tim.NoteEvents(), BPM: bpm} nv.DrawOn(gc) gc.SavePNG("TestRecorded_PROCESSED.png") } } func TestScaleInputSequenceBuilder(t *testing.T) { bpm := 120.0 s1, _ := core.NewScale("8C") s2, _ := core.NewScale("8C3") seq := op.Merge{ Target: []core.Sequenceable{s1, s2}, } tim := core.NewTimeline() d := midi.NewOutputDevice(0, nil, 0, tim) d.Play(core.NoCondition, seq, bpm, time.Now()) gc := gg.NewContext(500, 100) nv := NotesView{Events: tim.NoteEvents(), BPM: bpm} nv.DrawOn(gc) gc.SavePNG("TestRecorded_SCALE.png") }