melrōse musical expression player

package control import ( "bytes" "fmt" "time" "github.com/emicklei/melrose/core" "github.com/emicklei/melrose/op" ) type SyncPlay struct { playables []core.HasValue } func NewSyncPlay(list []core.HasValue) SyncPlay { return SyncPlay{playables: list} } func (s SyncPlay) Storex() string { var b bytes.Buffer fmt.Fprintf(&b, "sync(") for i, each := range s.playables { if i > 0 { fmt.Fprintf(&b, ",") } fmt.Fprintf(&b, "%s", core.Storex(each)) } fmt.Fprintf(&b, ")") return b.String() } // Play implements Playable func (s SyncPlay) Play(ctx core.Context, at time.Time) error { return s.Evaluate(ctx) } // Stop implements Stoppeable func (s SyncPlay) Stop(ctx core.Context) error { for _, each := range s.playables { val := each.Value() if ply, ok := val.(core.Stoppable); ok { _ = ply.Stop(ctx) } } return nil } func (s SyncPlay) S() core.Sequence { l := []core.Sequenceable{} for _, each := range s.playables { val := each.Value() if s, ok := val.(core.Sequenceable); ok { l = append(l, s) } } return (op.Merge{Target: l}).S() } // IsPlaying implements Stoppeable func (s SyncPlay) IsPlaying() bool { for _, each := range s.playables { val := each.Value() if ply, ok := val.(core.Stoppable); ok { if ply.IsPlaying() { return true } } } return false } func (s SyncPlay) Evaluate(ctx core.Context) error { for _, each := range s.playables { val := each.Value() if ply, ok := val.(core.Playable); ok { _ = ply.Play(ctx, time.Now()) } else { if seq, ok := val.(core.Sequenceable); ok { _ = ctx.Device().Play(core.NoCondition, seq, ctx.Control().BPM(), time.Now()) } } } return nil }