mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-26 19:58:54 +01:00
330 lines
8.2 KiB
HTML
330 lines
8.2 KiB
HTML
<!DOCTYPE html>
|
|
<!--
|
|
Copyright 2013 The Ebiten Authors
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
-->
|
|
<link rel="shortcut icon" href="../favicon.png" type="image/png" >
|
|
<link rel="icon" href="../favicon.png" type="image/png" >
|
|
<title>Ebiten example - audio</title>
|
|
<style>
|
|
body {
|
|
font-family: sans-serif;
|
|
}
|
|
iframe {
|
|
border-color: #999;
|
|
border-style: solid;
|
|
border-width: 1px;
|
|
overflow: hidden;
|
|
}
|
|
pre {
|
|
background: #eee;
|
|
padding: 1em;
|
|
}
|
|
</style>
|
|
<nav><a href="..">Ebiten</a></nav>
|
|
|
|
<h1>Ebiten example - audio</h1>
|
|
<iframe src="audio.content.html" width="640" height="480"></iframe>
|
|
<pre><code>// +build example
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"image/color"
|
|
"io/ioutil"
|
|
"log"
|
|
"time"
|
|
|
|
"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"
|
|
)
|
|
|
|
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(&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(&color.RGBA{0xff, 0xff, 0xff, 0xff}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|
|
|
|
type Player struct {
|
|
audioPlayer *audio.Player
|
|
total time.Duration
|
|
}
|
|
|
|
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]++
|
|
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() error {
|
|
if p.audioPlayer == nil {
|
|
return nil
|
|
}
|
|
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)
|
|
return nil
|
|
}
|
|
|
|
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]++
|
|
if keyState[ebiten.KeyS] != 1 {
|
|
return nil
|
|
}
|
|
if p.audioPlayer.IsPlaying() {
|
|
return p.audioPlayer.Pause()
|
|
}
|
|
return p.audioPlayer.Play()
|
|
}
|
|
|
|
func (p *Player) updateBar() error {
|
|
if p.audioPlayer == nil {
|
|
return nil
|
|
}
|
|
if !ebiten.IsMouseButtonPressed(ebiten.MouseButtonLeft) {
|
|
mouseButtonState[ebiten.MouseButtonLeft] = 0
|
|
return nil
|
|
}
|
|
mouseButtonState[ebiten.MouseButtonLeft]++
|
|
if mouseButtonState[ebiten.MouseButtonLeft] != 1 {
|
|
return nil
|
|
}
|
|
x, y := ebiten.CursorPosition()
|
|
bx, by, bw, bh := playerBarRect()
|
|
const padding = 4
|
|
if y < by-padding || by+bh+padding <= y {
|
|
return nil
|
|
}
|
|
if x < bx || bx+bw <= x {
|
|
return nil
|
|
}
|
|
pos := time.Duration(x-bx) * p.total / time.Duration(bw)
|
|
return 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 = <-musicCh:
|
|
default:
|
|
}
|
|
}
|
|
if seBytes == nil {
|
|
select {
|
|
case seBytes = <-seCh:
|
|
default:
|
|
}
|
|
}
|
|
if musicPlayer != nil {
|
|
if err := musicPlayer.updateBar(); err != nil {
|
|
return err
|
|
}
|
|
if err := musicPlayer.updatePlayPause(); err != nil {
|
|
return err
|
|
}
|
|
if err := musicPlayer.updateSE(); err != nil {
|
|
return err
|
|
}
|
|
if err := musicPlayer.updateVolume(); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
op := &ebiten.DrawImageOptions{}
|
|
x, y, w, h := playerBarRect()
|
|
op.GeoM.Translate(float64(x), float64(y))
|
|
if err := screen.DrawImage(playerBarImage, op); err != nil {
|
|
return err
|
|
}
|
|
currentTimeStr := "00:00"
|
|
if musicPlayer != nil {
|
|
c := musicPlayer.audioPlayer.Current()
|
|
|
|
// Current Time
|
|
m := (c / time.Minute) % 100
|
|
s := (c / time.Second) % 60
|
|
currentTimeStr = fmt.Sprintf("%02d:%02d", m, s)
|
|
|
|
// 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))
|
|
if err := screen.DrawImage(playerCurrentImage, op); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
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 += "\nNow Loading..."
|
|
}
|
|
if err := ebitenutil.DebugPrint(screen, msg); err != nil {
|
|
return err
|
|
}
|
|
if err := audioContext.Update(); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func main() {
|
|
wavF, err := ebitenutil.OpenFile("_resources/audio/jab.wav")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
oggF, err := ebitenutil.OpenFile("_resources/audio/ragtime.ogg")
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
const sampleRate = 22050
|
|
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 <- 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)
|
|
}
|
|
}
|
|
}
|
|
</code></pre>
|
|
|
|
|
|
<footer>© 2013 Hajime Hoshi</footer>
|