melrōse musical expression player

package control import ( "bytes" "fmt" "time" "github.com/emicklei/melrose/core" ) // Play represents play() and sync() type Play struct { ctx core.Context target []core.Sequenceable sync bool } func NewPlay(ctx core.Context, list []core.Sequenceable, playInSync bool) Play { return Play{ ctx: ctx, target: list, sync: playInSync, } } // Play is part of core.Playable func (p Play) Play(ctx core.Context, at time.Time) time.Time { cond := core.NoCondition if with, ok := ctx.(core.Conditional); ok { cond = with.Condition() } end := at for _, each := range p.target { end = p.ctx.Device().Play(cond, each, p.ctx.Control().BPM(), at) if !p.sync { // play after each other at = end } } return end } // Evaluate implements Evaluatable // performs the set operation func (p Play) Evaluate(ctx core.Context) error { moment := time.Now() cond := core.NoCondition if with, ok := ctx.(core.Conditional); ok { cond = with.Condition() } for _, each := range p.target { end := p.ctx.Device().Play(cond, each, p.ctx.Control().BPM(), moment) if !p.sync { // play after each other moment = end } } return nil } // Storex implements Storable func (p Play) Storex() string { var b bytes.Buffer if p.sync { fmt.Fprintf(&b, "sync(") } else { fmt.Fprintf(&b, "play(") } core.AppendStorexList(&b, true, p.target) fmt.Fprintf(&b, ")") return b.String() }