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kit.go
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kit.go
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package kit
import (
"bytes"
"fmt"
"runtime"
"strconv"
"strings"
"time"
"github.com/nats-io/nats.go"
midi "gitlab.com/gomidi/midi/v2"
)
var MidiOctaveShift int
var Midisetexternalscale bool
var Midithru bool
var MidiThruScadjust bool
var MidiNumDown int
var TheHost Host
func RegisterAndInit(h Host) error {
TheHost = h
return Init()
}
func RegisterHost(h Host) {
TheHost = h
}
func Init() error {
InitParamDefs()
if TheHost == nil {
return fmt.Errorf("kit.Init called without registering a Host")
}
LoadEngineParams("_Current.json")
logtypes, err := GetParam("engine.log")
if err == nil {
SetLogTypes(logtypes)
}
TheCursorManager = NewCursorManager()
TheScheduler = NewScheduler()
TheAttractManager = NewAttractManager()
TheQuadPro = NewQuadPro()
err = TheHost.Init()
if err != nil {
return err
}
enabled, err := GetParamBool("engine.attractenabled")
LogIfError(err)
TheAttractManager.SetAttractEnabled(enabled)
InitSynths()
TheNats = NewVizNats()
err = TheNats.Connect("tjt", "mantic0re")
return err
}
func StartEngine() {
TheHost.Start()
TheQuadPro.Start()
go TheScheduler.Start()
TheNats.Subscribe("toengine.>", NatsHandler)
}
func RemoteEngineApi(api string, data string) (string, error) {
LogInfo("RemoteEngineApi before Request", "api", api, "data", data)
result, err := TheNats.Request("engine.api."+api, data, time.Second)
if err == nats.ErrNoResponders {
return "", err
}
LogIfError(err)
LogInfo("RemoteEngineApi after Request", "result", result)
return result, nil
}
func NatsHandler(msg *nats.Msg) {
data := string(msg.Data)
LogInfo("NatsHandler", "subject", msg.Subject, "data", data)
}
func LoadEngineParams(fname string) {
// First set the defaults
for nm, d := range ParamDefs {
if strings.HasPrefix(nm, "engine.") {
err := EngineParams.Set(nm, d.Init)
LogIfError(err)
}
}
bytes, err := TheHost.GetSavedData("engine", fname)
if err != nil {
TheHost.LogError(err)
return
}
paramsmap, err := LoadParamsMap(bytes)
if err != nil {
TheHost.LogError(err)
return
}
EngineParams.ApplyValuesFromMap("engine", paramsmap, EngineParams.Set)
}
func ScheduleCursorEvent(ce CursorEvent) {
// schedule CursorEvents rather than handle them right away.
// This makes it easier to do looping, among other benefits.
LogOfType("scheduler", "ScheduleCursorEvent", "ce", ce)
ScheduleAt(CurrentClick(), ce.Tag, ce)
}
func HandleMidiEvent(me MidiEvent) {
TheHost.SendToOscClients(MidiToOscMsg(me))
if Midithru {
LogOfType("midi", "PassThruMIDI", "msg", me.Msg)
if MidiThruScadjust {
LogWarn("PassThruMIDI, midiThruScadjust needs work", "msg", me.Msg)
}
ScheduleAt(CurrentClick(), "midi", me.Msg)
}
if Midisetexternalscale {
handleMIDISetScaleNote(me)
}
err := TheQuadPro.onMidiEvent(me)
LogIfError(err)
if TheErae.enabled {
TheErae.onMidiEvent(me)
}
}
func handleMIDISetScaleNote(me MidiEvent) {
if !me.HasPitch() {
return
}
pitch := me.Pitch()
if me.Msg.Is(midi.NoteOnMsg) {
if MidiNumDown < 0 {
// may happen when there's a Read error that misses a noteon
MidiNumDown = 0
}
// If there are no notes held down (i.e. this is the first), clear the scale
if MidiNumDown == 0 {
LogOfType("scale", "Clearing external scale")
ClearExternalScale()
}
SetExternalScale(pitch, true)
MidiNumDown++
// adjust the octave shift based on incoming MIDI
newshift := 0
if pitch < 60 {
newshift = -1
} else if pitch > 72 {
newshift = 1
}
if newshift != MidiOctaveShift {
MidiOctaveShift = newshift
LogOfType("midi", "MidiOctaveShift changed", "octaveshift", MidiOctaveShift)
}
} else if me.Msg.Is(midi.NoteOffMsg) {
MidiNumDown--
}
}
func GoroutineID() uint64 {
b := make([]byte, 64)
b = b[:runtime.Stack(b, false)]
b = bytes.TrimPrefix(b, []byte("goroutine "))
b = b[:bytes.IndexByte(b, ' ')]
n, _ := strconv.ParseUint(string(b), 10, 64)
return n
}
func JsonObject(args ...string) string {
s := JsonString(args...)
return "{ " + s + " }"
}
func JsonString(args ...string) string {
if len(args)%2 != 0 {
LogWarn("ApiParams: odd number of arguments", "args", args)
return ""
}
params := ""
sep := ""
for n := range args {
if n%2 == 0 {
params = params + sep + "\"" + args[n] + "\": \"" + args[n+1] + "\""
}
sep = ", "
}
return params
}
func BoundValueZeroToOne(v float64) float64 {
if v < 0.0 {
return 0.0
}
if v > 1.0 {
return 1.0
}
return v
}
func GetNameValue(apiargs map[string]string) (name string, value string, err error) {
name, ok := apiargs["name"]
if !ok {
err = fmt.Errorf("missing name argument")
return
}
value, ok = apiargs["value"]
if !ok {
err = fmt.Errorf("missing value argument")
return
}
return
}
var FirstTime = true
var Time0 = time.Time{}
// Uptime returns the number of seconds since the program started.
func Uptime() float64 {
now := time.Now()
if FirstTime {
FirstTime = false
Time0 = now
}
return now.Sub(Time0).Seconds()
}