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play.go
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play.go
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package command
import (
"context"
"errors"
"fmt"
"math"
"strconv"
"strings"
"time"
"github.com/hajimehoshi/ebiten/v2"
"github.com/spf13/cobra"
ebikey "github.com/heucuva/go-qwertysynth/internal/input/keyboard"
"github.com/heucuva/go-qwertysynth/internal/machine"
"github.com/heucuva/go-qwertysynth/internal/machine/it"
"github.com/heucuva/go-qwertysynth/internal/machine/xm"
"github.com/heucuva/go-qwertysynth/internal/output"
deviceCommon "github.com/heucuva/go-qwertysynth/internal/output/device/common"
"github.com/heucuva/go-qwertysynth/internal/standards/tuning"
equalTuning "github.com/heucuva/go-qwertysynth/internal/standards/tuning/equal"
justTuning "github.com/heucuva/go-qwertysynth/internal/standards/tuning/just"
"github.com/heucuva/go-qwertysynth/internal/synth"
"github.com/heucuva/go-qwertysynth/internal/synth/envelope"
"github.com/heucuva/go-qwertysynth/internal/synth/keyboard"
"github.com/heucuva/go-qwertysynth/internal/synth/keymap"
"github.com/heucuva/go-qwertysynth/internal/synth/wave"
"github.com/heucuva/go-qwertysynth/internal/synth/wave/sine"
"github.com/heucuva/go-qwertysynth/internal/synth/wave/square"
"github.com/heucuva/go-qwertysynth/internal/synth/wave/triangle"
"github.com/heucuva/go-qwertysynth/internal/synth/wavetable"
)
// persistent flags
var (
playOutput = deviceCommon.Settings{
Channels: 2,
SamplesPerSecond: 44100,
BitsPerSample: 16,
}
playNumPremixBuffers int = 64
playTickLength time.Duration = time.Millisecond * 150
playMachineName string = "xm"
playTuningName string = "default"
playAM string = "square,adsr:150ms:50ms:-6.2db:1s"
playFM string = "sine,adsr:1s:80ms:-12.75db:1s,frequency:1.125,amplitude:16"
)
func init() {
output.Setup()
persistFlags := playCmd.PersistentFlags()
persistFlags.IntVarP(&playOutput.SamplesPerSecond, "sample-rate", "S", playOutput.SamplesPerSecond, "sample rate")
persistFlags.IntVarP(&playOutput.Channels, "channels", "c", playOutput.Channels, "channels")
persistFlags.IntVarP(&playOutput.BitsPerSample, "bits-per-sample", "b", playOutput.BitsPerSample, "bits per sample")
persistFlags.IntVar(&playNumPremixBuffers, "num-buffers", playNumPremixBuffers, "number of premixed buffers")
persistFlags.StringVarP(&playOutput.Name, "output", "O", output.DefaultOutputDeviceName, "output device")
persistFlags.StringVarP(&playMachineName, "machine", "m", playMachineName, "name of machine to use [xm, it]")
persistFlags.DurationVarP(&playTickLength, "tick", "T", playTickLength, "tick interval")
persistFlags.StringVarP(&playAM, "am", "a", playAM, "Amplitude Modulator settings")
persistFlags.StringVarP(&playFM, "fm", "f", playFM, "Frequency Modulator settings")
persistFlags.StringVar(&playTuningName, "tuning", playTuningName, "Tuning system to use")
rootCmd.AddCommand(playCmd)
}
var playCmd = &cobra.Command{
Use: "play [flags]",
Short: "Play synth sounds using the keyboard",
Long: "Play synth sounds using the keyboard.",
Args: cobra.ExactArgs(0),
RunE: func(cmd *cobra.Command, args []string) error {
return playSynth(playGetMachine(), nil, true)
},
}
func playGetMachine() machine.Machine {
tuning := playGetTuning()
switch strings.ToLower(playMachineName) {
case "it":
return it.Machine(tuning)
case "xm":
fallthrough
default:
return xm.Machine(tuning)
}
}
func playParseGeneratorName(name string) (wave.Generator, error) {
switch strings.ToLower(name) {
case "sine", "sin":
return sine.Sine, nil
case "square", "sqr":
return square.Square, nil
case "triangle", "tri":
return triangle.Triangle, nil
default:
return nil, fmt.Errorf("unsupported waveform name (%q)", name)
}
}
func playParseADSR(params string) (envelope.ADSR, error) {
var env envelope.ADSR
pieces := strings.SplitN(params, ":", 4)
if len(pieces) < 4 {
return env, errors.New("incorrect parameter count for envelope")
}
a, d, s, r := pieces[0], pieces[1], pieces[2], pieces[3]
if dur, err := time.ParseDuration(strings.TrimSpace(a)); err != nil {
return env, err
} else {
env.Attack = dur
}
if dur, err := time.ParseDuration(strings.TrimSpace(d)); err != nil {
return env, err
} else {
env.Decay = dur
}
if vol, err := playParseVol(s); err != nil {
return env, err
} else {
env.Sustain = vol
}
if dur, err := time.ParseDuration(strings.TrimSpace(r)); err != nil {
return env, err
} else {
env.Release = dur
}
return env, nil
}
func playParseVol(s string) (float32, error) {
if ss := strings.ToLower(strings.TrimSpace(s)); strings.HasSuffix(ss, "db") {
dbv, err := strconv.ParseFloat(strings.TrimSuffix(ss, "db"), 64)
if err != nil {
return 0, err
}
return db(dbv), nil
}
vol, err := strconv.ParseFloat(strings.TrimSpace(s), 32)
return float32(vol), err
}
func playParseComponent(s string) (wavetable.Component, error) {
var comp wavetable.Component
tokens := strings.Split(s, ",")
if len(tokens) < 1 {
return comp, errors.New("must specify wave generator name as first parameter")
}
waveName := strings.TrimSpace(tokens[0])
if gen, err := playParseGeneratorName(waveName); err != nil {
return comp, err
} else {
comp.Generator = gen
}
for _, token := range tokens[1:] {
pieces := strings.SplitN(token, ":", 2)
name, value := strings.TrimSpace(pieces[0]), strings.TrimSpace(pieces[1])
switch ln := strings.ToLower(name); ln {
case "adsr":
if env, err := playParseADSR(value); err != nil {
return comp, err
} else {
comp.Envelope = env
}
case "amplitude", "amp", "a":
if vol, err := playParseVol(value); err != nil {
return comp, err
} else {
comp.Options = append(comp.Options, wave.SetParameterByName("amplitude", vol))
}
case "frequency", "freq", "f":
if freq, err := strconv.ParseFloat(value, 64); err != nil {
return comp, err
} else {
comp.Options = append(comp.Options, wave.SetParameterByName("frequency", freq))
}
default:
comp.Options = append(comp.Options, wave.SetParameterByName(name, value))
}
}
return comp, nil
}
func playGetTuning() tuning.Tuning {
switch strings.ToLower(playTuningName) {
case "equal-a415", "a415":
return equalTuning.A415
case "equal-a427", "a427":
return equalTuning.A427
case "equal-a428", "a428":
return equalTuning.A428
case "equal-a429", "a429":
return equalTuning.A429
case "equal-a430", "a430":
return equalTuning.A430
case "equal-a432", "a432":
return equalTuning.A432
case "equal-a435", "a435":
return equalTuning.A435
case "equal-a440", "a440":
return equalTuning.A440
case "equal-a444", "a444":
return equalTuning.A444
case "equal-a466", "a466":
return equalTuning.A466
case "equal-scientific", "scientific":
return equalTuning.Scientific
case "equal-53", "53tet", "53":
return equalTuning.FiftyThree
case "just-harmonic", "harmonic":
return justTuning.Harmonic
case "just-pythagorean", "pythagorean":
return justTuning.Pythagorean
default:
return nil
}
}
func playSynth(mach machine.Machine, onTick synth.SynthTickFunc, showHelp bool) error {
var op wavetable.Operator
if am, err := playParseComponent(playAM); err != nil {
return err
} else {
op.Amplitude = am
}
if op.Amplitude.Generator == nil {
return errors.New("must specify a valid amplitude modulator")
}
if playFM != "" {
if fm, err := playParseComponent(playFM); err != nil {
return err
} else {
op.Frequency = fm
}
}
wt, err := wavetable.Generate(mach, op)
if err != nil {
panic(err)
}
voices := keyboard.NewKeyboard(mach, keymap.Default(mach.Tuning()), wt)
out, err := output.CreateOutputDevice(deviceCommon.Settings{
Name: output.DefaultOutputDeviceName,
Channels: playOutput.Channels,
SamplesPerSecond: playOutput.SamplesPerSecond,
BitsPerSample: playOutput.BitsPerSample,
})
if err != nil {
panic(err)
}
defer out.Close()
s := synth.NewSynth(playTickLength, voices, playNumPremixBuffers, float64(playOutput.SamplesPerSecond), 0.25)
defer s.Close()
ctx, cancel := context.WithCancel(context.Background())
go func() {
defer cancel()
if err := s.Run(onTick); err != nil && !errors.Is(err, errTrackerDone) {
panic(err)
}
}()
go func() {
defer cancel()
if err := out.PlayWithCtx(ctx, s.C()); err != nil && !errors.Is(err, context.Canceled) {
panic(err)
}
}()
if err := ebiten.RunGame(ebikey.NewKeyboard(ctx, s, nil, showHelp)); err != nil && !errors.Is(err, ebikey.ErrWantStop) {
panic(err)
}
fmt.Printf("closing...\n")
return nil
}
func db(amt float64) float32 {
return float32(math.Pow(10.0, amt/20.0))
}
func init() {
output.Setup()
}