ebiten/docs/examples/audio.html

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  <h2>Ebiten example - audio</h2>
  <iframe src="audio.content.html" width="640" height="480"></iframe>
  <pre><code class="language-go">// &#43;build example

package main

import (
        &#34;fmt&#34;
        &#34;image/color&#34;
        &#34;io/ioutil&#34;
        &#34;log&#34;
        &#34;time&#34;

        &#34;github.com/hajimehoshi/ebiten&#34;
        &#34;github.com/hajimehoshi/ebiten/audio&#34;
        &#34;github.com/hajimehoshi/ebiten/audio/vorbis&#34;
        &#34;github.com/hajimehoshi/ebiten/audio/wav&#34;
        &#34;github.com/hajimehoshi/ebiten/ebitenutil&#34;
)

const (
        screenWidth  = 320
        screenHeight = 240
)

var (
        playerBarImage     *ebiten.Image
        playerCurrentImage *ebiten.Image
)

func init() {
        var err error
        playerBarImage, err = ebiten.NewImage(300, 4, ebiten.FilterNearest)
        if err != nil {
                log.Fatal(err)
        }
        if err := playerBarImage.Fill(&amp;color.RGBA{0x80, 0x80, 0x80, 0xff}); err != nil {
                log.Fatal(err)
        }

        playerCurrentImage, err = ebiten.NewImage(4, 10, ebiten.FilterNearest)
        if err != nil {
                log.Fatal(err)
        }
        if err := playerCurrentImage.Fill(&amp;color.RGBA{0xff, 0xff, 0xff, 0xff}); err != nil {
                log.Fatal(err)
        }
}

type Player struct {
        audioPlayer *audio.Player
        total       time.Duration
        seekedCh    chan error
}

var (
        audioContext     *audio.Context
        musicPlayer      *Player
        seBytes          []byte
        musicCh          = make(chan *Player)
        seCh             = make(chan []byte)
        mouseButtonState = map[ebiten.MouseButton]int{}
        keyState         = map[ebiten.Key]int{}
        volume128        = 128
)

func playerBarRect() (x, y, w, h int) {
        w, h = playerBarImage.Size()
        x = (screenWidth - w) / 2
        y = screenHeight - h - 16
        return
}

func (p *Player) updateSE() error {
        if seBytes == nil {
                return nil
        }
        if !ebiten.IsKeyPressed(ebiten.KeyP) {
                keyState[ebiten.KeyP] = 0
                return nil
        }
        keyState[ebiten.KeyP]&#43;&#43;
        if keyState[ebiten.KeyP] != 1 {
                return nil
        }
        sePlayer, err := audio.NewPlayerFromBytes(audioContext, seBytes)
        if err != nil {
                return err
        }
        return sePlayer.Play()
}

func (p *Player) updateVolume() {
        if p.audioPlayer == nil {
                return
        }
        if ebiten.IsKeyPressed(ebiten.KeyZ) {
                volume128--
        }
        if ebiten.IsKeyPressed(ebiten.KeyX) {
                volume128&#43;&#43;
        }
        if volume128 &lt; 0 {
                volume128 = 0
        }
        if 128 &lt; volume128 {
                volume128 = 128
        }
        p.audioPlayer.SetVolume(float64(volume128) / 128)
}

func (p *Player) updatePlayPause() error {
        if p.audioPlayer == nil {
                return nil
        }
        if !ebiten.IsKeyPressed(ebiten.KeyS) {
                keyState[ebiten.KeyS] = 0
                return nil
        }
        keyState[ebiten.KeyS]&#43;&#43;
        if keyState[ebiten.KeyS] != 1 {
                return nil
        }
        if p.audioPlayer.IsPlaying() {
                return p.audioPlayer.Pause()
        }
        return p.audioPlayer.Play()
}

func (p *Player) updateBar() {
        if p.audioPlayer == nil {
                return
        }
        if p.seekedCh != nil {
                return
        }
        if !ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
                mouseButtonState[ebiten.MouseButtonLeft] = 0
                return
        }
        mouseButtonState[ebiten.MouseButtonLeft]&#43;&#43;
        if mouseButtonState[ebiten.MouseButtonLeft] != 1 {
                return
        }
        x, y := ebiten.CursorPosition()
        bx, by, bw, bh := playerBarRect()
        const padding = 4
        if y &lt; by-padding || by&#43;bh&#43;padding &lt;= y {
                return
        }
        if x &lt; bx || bx&#43;bw &lt;= x {
                return
        }
        pos := time.Duration(x-bx) * p.total / time.Duration(bw)
        p.seekedCh = make(chan error, 1)
        go func() {
                // This can&#39;t be done parallely! !?!?
                p.seekedCh &lt;- p.audioPlayer.Seek(pos)
        }()
}

func (p *Player) close() error {
        return p.audioPlayer.Close()
}

func update(screen *ebiten.Image) error {
        if musicPlayer == nil {
                select {
                case musicPlayer = &lt;-musicCh:
                default:
                }
        }
        if seBytes == nil {
                select {
                case seBytes = &lt;-seCh:
                default:
                }
        }
        if musicPlayer != nil {
                musicPlayer.updateBar()
                if err := musicPlayer.updatePlayPause(); err != nil {
                        return err
                }
                if err := musicPlayer.updateSE(); err != nil {
                        return err
                }
                musicPlayer.updateVolume()
        }
        if ebiten.IsRunningSlowly() {
                return nil
        }
        op := &amp;ebiten.DrawImageOptions{}
        x, y, w, h := playerBarRect()
        op.GeoM.Translate(float64(x), float64(y))
        screen.DrawImage(playerBarImage, op)
        currentTimeStr := &#34;00:00&#34;
        if musicPlayer != nil {
                c := musicPlayer.audioPlayer.Current()

                // Current Time
                m := (c / time.Minute) % 100
                s := (c / time.Second) % 60
                currentTimeStr = fmt.Sprintf(&#34;%02d:%02d&#34;, m, s)

                // Bar
                cw, ch := playerCurrentImage.Size()
                cx := int(time.Duration(w)*c/musicPlayer.total) &#43; x - cw/2
                cy := y - (ch-h)/2
                op := &amp;ebiten.DrawImageOptions{}
                op.GeoM.Translate(float64(cx), float64(cy))
                screen.DrawImage(playerCurrentImage, op)
        }

        msg := fmt.Sprintf(`FPS: %0.2f
Press S to toggle Play/Pause
Press P to play SE
Press Z or X to change volume of the music
%s`, ebiten.CurrentFPS(), currentTimeStr)
        if musicPlayer == nil {
                msg &#43;= &#34;\nNow Loading...&#34;
        } else if musicPlayer.seekedCh != nil {
                select {
                case err := &lt;-musicPlayer.seekedCh:
                        if err != nil {
                                return err
                        }
                        close(musicPlayer.seekedCh)
                        musicPlayer.seekedCh = nil
                default:
                        msg &#43;= &#34;\nSeeking...&#34;
                }
        }
        ebitenutil.DebugPrint(screen, msg)
        if err := audioContext.Update(); err != nil {
                return err
        }
        return nil
}

func main() {
        wavF, err := ebitenutil.OpenFile(&#34;_resources/audio/jab.wav&#34;)
        if err != nil {
                log.Fatal(err)
        }
        oggF, err := ebitenutil.OpenFile(&#34;_resources/audio/game.ogg&#34;)
        if err != nil {
                log.Fatal(err)
        }
        // This sample rate doesn&#39;t match with wav/ogg&#39;s sample rate,
        // but decoders adjust them.
        const sampleRate = 48000
        const bytesPerSample = 4 // TODO: This should be defined in audio package
        audioContext, err = audio.NewContext(sampleRate)
        if err != nil {
                log.Fatal(err)
        }
        go func() {
                s, err := wav.Decode(audioContext, wavF)
                if err != nil {
                        log.Fatal(err)
                        return
                }
                b, err := ioutil.ReadAll(s)
                if err != nil {
                        log.Fatal(err)
                        return
                }
                seCh &lt;- b
                close(seCh)
        }()
        go func() {
                s, err := vorbis.Decode(audioContext, oggF)
                if err != nil {
                        log.Fatal(err)
                        return
                }
                p, err := audio.NewPlayer(audioContext, s)
                if err != nil {
                        log.Fatal(err)
                        return
                }
                musicCh &lt;- &amp;Player{
                        audioPlayer: p,
                        total:       time.Second * time.Duration(s.Size()) / bytesPerSample / sampleRate,
                }
                close(musicCh)
                // TODO: Is this goroutine-safe?
                if err := p.Play(); err != nil {
                        log.Fatal(err)
                        return
                }
        }()
        if err := ebiten.Run(update, screenWidth, screenHeight, 2, &#34;Audio (Ebiten Demo)&#34;); err != nil {
                log.Fatal(err)
        }
        if musicPlayer != nil {
                if err := musicPlayer.close(); err != nil {
                        log.Fatal(err)
                }
        }
}
</code></pre>

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doc: Add new examples 2016-04-13 18:26:31 +02:00			`<!DOCTYPE html>`
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			`<title>Ebiten example - audio</title>`
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doc: Add new examples 2016-04-13 18:26:31 +02:00
doc: Apply bootstrap 2016-08-26 19:28:57 +02:00			`<main><div class="container">`

doc: Adjust fonts 2016-08-26 20:18:16 +02:00			`<h2>Ebiten example - audio</h2>`
doc: Apply bootstrap 2016-08-26 19:28:57 +02:00			`<iframe src="audio.content.html" width="640" height="480"></iframe>`
doc: Highlight code 2016-08-27 07:00:06 +02:00			`<pre><code class="language-go">// +build example`
doc: go generate; Add style.css 2016-08-26 16:33:36 +02:00
			`package main`
doc: Add new examples 2016-04-13 18:26:31 +02:00
			`import (`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`"fmt"`
			`"image/color"`
			`"io/ioutil"`
			`"log"`
			`"time"`
doc: Add new examples 2016-04-13 18:26:31 +02:00
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`"github.com/hajimehoshi/ebiten"`
			`"github.com/hajimehoshi/ebiten/audio"`
			`"github.com/hajimehoshi/ebiten/audio/vorbis"`
			`"github.com/hajimehoshi/ebiten/audio/wav"`
			`"github.com/hajimehoshi/ebiten/ebitenutil"`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`)`

			`const (`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`screenWidth = 320`
			`screenHeight = 240`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`)`

			`var (`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`playerBarImage *ebiten.Image`
			`playerCurrentImage *ebiten.Image`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`)`

			`func init() {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`var err error`
			`playerBarImage, err = ebiten.NewImage(300, 4, ebiten.FilterNearest)`
			`if err != nil {`
			`log.Fatal(err)`
			`}`
			`if err := playerBarImage.Fill(&color.RGBA{0x80, 0x80, 0x80, 0xff}); err != nil {`
			`log.Fatal(err)`
			`}`
doc: Add new examples 2016-04-13 18:26:31 +02:00
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`playerCurrentImage, err = ebiten.NewImage(4, 10, ebiten.FilterNearest)`
			`if err != nil {`
			`log.Fatal(err)`
			`}`
			`if err := playerCurrentImage.Fill(&color.RGBA{0xff, 0xff, 0xff, 0xff}); err != nil {`
			`log.Fatal(err)`
			`}`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

			`type Player struct {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`audioPlayer *audio.Player`
			`total time.Duration`
doc: Ogg/Vorbis is now available on Safari (#294) 2016-11-28 19:42:16 +01:00			`seekedCh chan error`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

			`var (`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`audioContext *audio.Context`
			`musicPlayer *Player`
			`seBytes []byte`
			`musicCh = make(chan *Player)`
			`seCh = make(chan []byte)`
			`mouseButtonState = map[ebiten.MouseButton]int{}`
			`keyState = map[ebiten.Key]int{}`
			`volume128 = 128`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`)`

			`func playerBarRect() (x, y, w, h int) {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`w, h = playerBarImage.Size()`
			`x = (screenWidth - w) / 2`
			`y = screenHeight - h - 16`
			`return`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

			`func (p *Player) updateSE() error {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if seBytes == nil {`
			`return nil`
			`}`
			`if !ebiten.IsKeyPressed(ebiten.KeyP) {`
			`keyState[ebiten.KeyP] = 0`
			`return nil`
			`}`
			`keyState[ebiten.KeyP]++`
			`if keyState[ebiten.KeyP] != 1 {`
			`return nil`
			`}`
			`sePlayer, err := audio.NewPlayerFromBytes(audioContext, seBytes)`
			`if err != nil {`
			`return err`
			`}`
			`return sePlayer.Play()`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

docs: Update example pages 2017-03-04 15:27:25 +01:00			`func (p *Player) updateVolume() {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if p.audioPlayer == nil {`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`return`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`}`
			`if ebiten.IsKeyPressed(ebiten.KeyZ) {`
			`volume128--`
			`}`
			`if ebiten.IsKeyPressed(ebiten.KeyX) {`
			`volume128++`
			`}`
			`if volume128 < 0 {`
			`volume128 = 0`
			`}`
			`if 128 < volume128 {`
			`volume128 = 128`
			`}`
			`p.audioPlayer.SetVolume(float64(volume128) / 128)`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

			`func (p *Player) updatePlayPause() error {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if p.audioPlayer == nil {`
			`return nil`
			`}`
			`if !ebiten.IsKeyPressed(ebiten.KeyS) {`
			`keyState[ebiten.KeyS] = 0`
			`return nil`
			`}`
			`keyState[ebiten.KeyS]++`
			`if keyState[ebiten.KeyS] != 1 {`
			`return nil`
			`}`
			`if p.audioPlayer.IsPlaying() {`
			`return p.audioPlayer.Pause()`
			`}`
			`return p.audioPlayer.Play()`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

docs: Update example pages 2017-03-04 15:27:25 +01:00			`func (p *Player) updateBar() {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if p.audioPlayer == nil {`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`return`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`}`
doc: Ogg/Vorbis is now available on Safari (#294) 2016-11-28 19:42:16 +01:00			`if p.seekedCh != nil {`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`return`
doc: Ogg/Vorbis is now available on Safari (#294) 2016-11-28 19:42:16 +01:00			`}`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if !ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {`
			`mouseButtonState[ebiten.MouseButtonLeft] = 0`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`return`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`}`
			`mouseButtonState[ebiten.MouseButtonLeft]++`
			`if mouseButtonState[ebiten.MouseButtonLeft] != 1 {`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`return`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`}`
			`x, y := ebiten.CursorPosition()`
			`bx, by, bw, bh := playerBarRect()`
			`const padding = 4`
			`if y < by-padding \|\| by+bh+padding <= y {`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`return`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`}`
			`if x < bx \|\| bx+bw <= x {`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`return`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`}`
			`pos := time.Duration(x-bx) * p.total / time.Duration(bw)`
doc: Ogg/Vorbis is now available on Safari (#294) 2016-11-28 19:42:16 +01:00			`p.seekedCh = make(chan error, 1)`
			`go func() {`
			`// This can't be done parallely! !?!?`
			`p.seekedCh <- p.audioPlayer.Seek(pos)`
			`}()`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

			`func (p *Player) close() error {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`return p.audioPlayer.Close()`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

			`func update(screen *ebiten.Image) error {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if musicPlayer == nil {`
			`select {`
			`case musicPlayer = <-musicCh:`
			`default:`
			`}`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if seBytes == nil {`
			`select {`
			`case seBytes = <-seCh:`
			`default:`
			`}`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if musicPlayer != nil {`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`musicPlayer.updateBar()`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if err := musicPlayer.updatePlayPause(); err != nil {`
			`return err`
			`}`
			`if err := musicPlayer.updateSE(); err != nil {`
			`return err`
			`}`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`musicPlayer.updateVolume()`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`
doc: Update examples (#354) 2017-05-16 03:38:34 +02:00			`if ebiten.IsRunningSlowly() {`
			`return nil`
			`}`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`op := &ebiten.DrawImageOptions{}`
			`x, y, w, h := playerBarRect()`
			`op.GeoM.Translate(float64(x), float64(y))`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`screen.DrawImage(playerBarImage, op)`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`currentTimeStr := "00:00"`
			`if musicPlayer != nil {`
			`c := musicPlayer.audioPlayer.Current()`
doc: Add new examples 2016-04-13 18:26:31 +02:00
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`// Current Time`
			`m := (c / time.Minute) % 100`
			`s := (c / time.Second) % 60`
			`currentTimeStr = fmt.Sprintf("%02d:%02d", m, s)`
doc: Add new examples 2016-04-13 18:26:31 +02:00
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`// Bar`
			`cw, ch := playerCurrentImage.Size()`
			`cx := int(time.Duration(w)*c/musicPlayer.total) + x - cw/2`
			`cy := y - (ch-h)/2`
			`op := &ebiten.DrawImageOptions{}`
			`op.GeoM.Translate(float64(cx), float64(cy))`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`screen.DrawImage(playerCurrentImage, op)`
doc: go generate; Add style.css 2016-08-26 16:33:36 +02:00			`}`
doc: Add new examples 2016-04-13 18:26:31 +02:00
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			msg := fmt.Sprintf(`FPS: %0.2f
doc: Add new examples 2016-04-13 18:26:31 +02:00			`Press S to toggle Play/Pause`
			`Press P to play SE`
			`Press Z or X to change volume of the music`
			%s`, ebiten.CurrentFPS(), currentTimeStr)
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if musicPlayer == nil {`
			`msg += "\nNow Loading..."`
doc: Ogg/Vorbis is now available on Safari (#294) 2016-11-28 19:42:16 +01:00			`} else if musicPlayer.seekedCh != nil {`
			`select {`
			`case err := <-musicPlayer.seekedCh:`
			`if err != nil {`
			`return err`
			`}`
			`close(musicPlayer.seekedCh)`
			`musicPlayer.seekedCh = nil`
			`default:`
			`msg += "\nSeeking..."`
			`}`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`}`
docs: Update example pages 2017-03-04 15:27:25 +01:00			`ebitenutil.DebugPrint(screen, msg)`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`if err := audioContext.Update(); err != nil {`
			`return err`
			`}`
			`return nil`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`

			`func main() {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`wavF, err := ebitenutil.OpenFile("_resources/audio/jab.wav")`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`if err != nil {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`log.Fatal(err)`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`
doc: Update docs for Safari (#293) 2016-11-26 16:11:23 +01:00			`oggF, err := ebitenutil.OpenFile("_resources/audio/game.ogg")`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`if err != nil {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`log.Fatal(err)`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`
doc: Now retunring values don't have to be cared 2017-03-04 04:04:19 +01:00			`// This sample rate doesn't match with wav/ogg's sample rate,`
			`// but decoders adjust them.`
			`const sampleRate = 48000`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`const bytesPerSample = 4 // TODO: This should be defined in audio package`
			`audioContext, err = audio.NewContext(sampleRate)`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`if err != nil {`
doc: Change indent size 4 -> 8 2016-08-26 22:36:52 +02:00			`log.Fatal(err)`
			`}`
			`go func() {`
			`s, err := wav.Decode(audioContext, wavF)`
			`if err != nil {`
			`log.Fatal(err)`
			`return`
			`}`
			`b, err := ioutil.ReadAll(s)`
			`if err != nil {`
			`log.Fatal(err)`
			`return`
			`}`
			`seCh <- b`
			`close(seCh)`
			`}()`
			`go func() {`
			`s, err := vorbis.Decode(audioContext, oggF)`
			`if err != nil {`
			`log.Fatal(err)`
			`return`
			`}`
			`p, err := audio.NewPlayer(audioContext, s)`
			`if err != nil {`
			`log.Fatal(err)`
			`return`
			`}`
			`musicCh <- &Player{`
			`audioPlayer: p,`
			`total: time.Second * time.Duration(s.Size()) / bytesPerSample / sampleRate,`
			`}`
			`close(musicCh)`
			`// TODO: Is this goroutine-safe?`
			`if err := p.Play(); err != nil {`
			`log.Fatal(err)`
			`return`
			`}`
			`}()`
			`if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Audio (Ebiten Demo)"); err != nil {`
			`log.Fatal(err)`
			`}`
			`if musicPlayer != nil {`
			`if err := musicPlayer.close(); err != nil {`
			`log.Fatal(err)`
			`}`
			`}`
doc: Add new examples 2016-04-13 18:26:31 +02:00			`}`
			`</code></pre>`

doc: Apply bootstrap 2016-08-26 19:28:57 +02:00			`</div></main>`

			`<footer><div class="container">`
			`<p>© 2013 Hajime Hoshi</p>`
doc: Add 'the' 2016-08-28 00:10:41 +02:00			`<p>Code is licensed under <a href="https://github.com/hajimehoshi/ebiten/blob/master/LICENSE">the Apache License 2.0</a>.</p>`
doc: Apply bootstrap 2016-08-26 19:28:57 +02:00			`<p>The content of this page is licensed under <a href="https://creativecommons.org/licenses/by/4.0/">the Creative Commons Attribution 4.0 License</a>.</p>`
			`</div></footer>`
doc: Add new examples 2016-04-13 18:26:31 +02:00
doc: Use relative path 2016-08-27 17:48:15 +02:00			`<script src="../scripts/highlight.pack.js"></script>`
doc: Highlight code 2016-08-27 07:00:06 +02:00			`<script>hljs.initHighlightingOnLoad();</script>`