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player.go
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player.go
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package audio
import (
"fmt"
"github.com/g3n/engine/audio"
"github.com/g3n/engine/audio/al"
"github.com/g3n/engine/gui"
"github.com/g3n/engine/gui/assets/icon"
"github.com/g3n/engine/math32"
"github.com/g3n/g3nd/app"
"github.com/g3n/g3nd/demos"
"time"
)
func init() {
demos.Map["audio.player"] = &AudioPlayer{}
}
type AudioPlayer struct {
lastUpdate time.Time
pc1 *PlayerControl
pc2 *PlayerControl
pc3 *PlayerControl
pc4 *PlayerControl
}
func (t *AudioPlayer) Initialize(a *app.App) {
var err error
t.pc1, err = NewPlayerControl(a, "bomb1.wav")
t.pc1.player.SetLooping(false)
if err != nil {
a.Log().Fatal("%s", err)
}
t.pc1.SetPosition(40, 10)
a.GuiPanel().Add(t.pc1)
t.pc2, err = NewPlayerControl(a, "Vivaldi1.wav")
if err != nil {
a.Log().Fatal("%s", err)
}
t.pc2.SetPosition(40, t.pc1.Position().Y+t.pc1.Height()+20)
a.GuiPanel().Add(t.pc2)
t.pc3, err = NewPlayerControl(a, "bomb2.ogg")
t.pc3.player.SetLooping(false)
if err != nil {
a.Log().Fatal("%s", err)
}
t.pc3.SetPosition(40, t.pc2.Position().Y+t.pc2.Height()+40)
a.GuiPanel().Add(t.pc3)
t.pc4, err = NewPlayerControl(a, "Bach1.ogg")
if err != nil {
a.Log().Fatal("%s", err)
}
t.pc4.SetPosition(40, t.pc3.Position().Y+t.pc3.Height()+20)
a.GuiPanel().Add(t.pc4)
}
func (t *AudioPlayer) Render(a *app.App) {
if time.Now().Sub(t.lastUpdate) < 100*time.Millisecond {
return
}
t.pc1.UpdateTime()
t.pc2.UpdateTime()
t.pc3.UpdateTime()
t.pc4.UpdateTime()
t.lastUpdate = time.Now()
}
type PlayerControl struct {
gui.Panel // Embedded panel
player *audio.Player
title *gui.Label
sliderTime *gui.Slider
sliderGain *gui.Slider
sliderPitch *gui.Slider
}
func NewPlayerControl(a *app.App, filename string) (*PlayerControl, error) {
// Creates player
player, err := audio.NewPlayer(a.DirData() + "/audio/" + filename)
if err != nil {
return nil, err
}
pc := new(PlayerControl)
pc.player = player
pc.Panel.Initialize(300, 90)
pc.SetBorders(1, 1, 1, 1)
pc.SetColor(&math32.Color{0.5, 0.5, 0.5})
pc.SetPaddings(4, 4, 4, 4)
// External layout
layout := gui.NewHBoxLayout()
layout.SetSpacing(4)
pc.SetLayout(layout)
// Panel for left group
panLeft := gui.NewPanel(0, 0)
panLeft.SetBorders(0, 0, 0, 0)
panLeft.SetLayoutParams(&gui.HBoxLayoutParams{AlignV: gui.AlignHeight, Expand: 4.5})
panLeftLayout := gui.NewVBoxLayout()
panLeft.SetLayout(panLeftLayout)
pc.Add(panLeft)
// Panel for right group
panRight := gui.NewPanel(0, 0)
panRight.SetBorders(0, 0, 0, 0)
panRight.SetPaddings(0, 0, 0, 4)
panRight.SetLayoutParams(&gui.HBoxLayoutParams{AlignV: gui.AlignHeight, Expand: 1})
panRightLayout := gui.NewHBoxLayout()
panRightLayout.SetSpacing(4)
panRight.SetLayout(panRightLayout)
pc.Add(panRight)
// File name
pc.title = gui.NewLabel("title")
pc.title.SetLayoutParams(&gui.VBoxLayoutParams{AlignH: gui.AlignCenter, Expand: 0})
panLeft.Add(pc.title)
// Slider for current time
pc.sliderTime = gui.NewHSlider(0, 24)
pc.sliderTime.SetLayoutParams(&gui.VBoxLayoutParams{AlignH: gui.AlignWidth, Expand: 0})
pc.sliderTime.SetEnabled(false)
sliderTimeStyles := gui.StyleDefault().Slider
sliderTimeStyles.Disabled.FgColor.SetName("dodgerblue")
pc.sliderTime.SetStyles(&sliderTimeStyles)
panLeft.Add(pc.sliderTime)
// Panel for control buttons
bPanel := gui.NewPanel(0, 0)
bPanel.SetBorders(0, 0, 0, 0)
bPanelLayout := gui.NewHBoxLayout()
bPanelLayout.SetSpacing(10)
bPanelLayout.SetAlignH(gui.AlignWidth)
bPanel.SetLayout(bPanelLayout)
// Play button
bPlay := gui.NewButton("Play")
bPlay.SetIcon(icon.PlayArrow)
bPlay.SetLayoutParams(&gui.HBoxLayoutParams{AlignV: gui.AlignCenter})
bPlay.Subscribe(gui.OnClick, func(name string, ev interface{}) {
pc.player.Play()
})
bPanel.Add(bPlay)
// Pause button
bPause := gui.NewButton("Pause")
bPause.SetIcon(icon.Pause)
bPause.SetLayoutParams(&gui.HBoxLayoutParams{AlignV: gui.AlignCenter})
bPause.Subscribe(gui.OnClick, func(name string, ev interface{}) {
pc.player.Pause()
})
bPanel.Add(bPause)
// Stop button
bStop := gui.NewButton("Stop")
bStop.SetIcon(icon.Stop)
bStop.SetLayoutParams(&gui.HBoxLayoutParams{AlignV: gui.AlignCenter})
bStop.Subscribe(gui.OnClick, func(name string, ev interface{}) {
pc.player.Stop()
pc.UpdateTime()
})
bPanel.Add(bStop)
// Sets button panel layout and adds it to player panel
bPanel.SetLayoutParams(&gui.VBoxLayoutParams{AlignH: gui.AlignWidth, Expand: 1})
panLeft.Add(bPanel)
// Gain Slider
pc.sliderGain = gui.NewVSlider(20, 0)
pc.sliderGain.SetLayoutParams(&gui.HBoxLayoutParams{AlignV: gui.AlignHeight, Expand: 0})
pc.sliderGain.SetEnabled(true)
pc.sliderGain.SetText("G")
pc.sliderGain.SetValue(pc.player.Gain())
pc.sliderGain.Subscribe(gui.OnChange, func(evname string, ev interface{}) {
pc.player.SetGain(pc.sliderGain.Value())
})
sliderGainStyles := gui.StyleDefault().Slider
sliderGainStyles.Normal.FgColor.SetName("darkseagreen")
sliderGainStyles.Over.FgColor.SetName("darkseagreen").MultiplyScalar(1.1)
pc.sliderGain.SetStyles(&sliderGainStyles)
panRight.Add(pc.sliderGain)
// Pitch Slider
pc.sliderPitch = gui.NewVSlider(20, 0)
pc.sliderPitch.SetLayoutParams(&gui.HBoxLayoutParams{AlignV: gui.AlignHeight, Expand: 0})
pc.sliderPitch.SetEnabled(true)
pc.sliderPitch.SetText("P")
pc.sliderPitch.SetValue(pc.player.Pitch() / 2)
pc.sliderPitch.Subscribe(gui.OnChange, func(evname string, ev interface{}) {
pc.player.SetPitch(pc.sliderPitch.Value() * 2)
})
sliderPitchStyles := gui.StyleDefault().Slider
sliderPitchStyles.Normal.FgColor.SetName("darkseagreen")
sliderPitchStyles.Over.FgColor.SetName("darkseagreen").MultiplyScalar(1.1)
pc.sliderPitch.SetStyles(&sliderPitchStyles)
panRight.Add(pc.sliderPitch)
pc.title.SetText(filename)
return pc, nil
}
func (pc *PlayerControl) Dispose() {
pc.Panel.Dispose()
pc.player.Dispose()
}
func (pc *PlayerControl) UpdateTime() {
if pc.player.State() != al.Playing {
return
}
msg := fmt.Sprintf("%1.1f / %1.1f", pc.player.CurrentTime(), pc.player.TotalTime())
pc.sliderTime.SetText(msg)
pc.sliderTime.SetValue(float32(pc.player.CurrentTime() / pc.player.TotalTime()))
}