mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 13:07:26 +01:00
104 lines
2.6 KiB
Go
104 lines
2.6 KiB
Go
// Copyright 2017 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build example
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package main
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import (
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"bytes"
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"log"
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"github.com/hajimehoshi/ebiten/v2"
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"github.com/hajimehoshi/ebiten/v2/audio"
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"github.com/hajimehoshi/ebiten/v2/audio/wav"
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"github.com/hajimehoshi/ebiten/v2/ebitenutil"
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raudio "github.com/hajimehoshi/ebiten/v2/examples/resources/audio"
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)
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const (
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screenWidth = 320
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screenHeight = 240
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sampleRate = 44100
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)
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type Game struct {
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audioContext *audio.Context
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audioPlayer *audio.Player
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}
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var g Game
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func init() {
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var err error
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// Initialize audio context.
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g.audioContext = audio.NewContext(sampleRate)
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// In this example, embedded resource "Jab_wav" is used.
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//
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// If you want to use a wav file, open this and pass the file stream to wav.Decode.
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// Note that file's Close() should not be closed here
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// since audio.Player manages stream state.
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//
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// f, err := os.Open("jab.wav")
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// if err != nil {
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// return err
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// }
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//
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// d, err := wav.Decode(g.audioContext, f)
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// ...
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// Decode wav-formatted data and retrieve decoded PCM stream.
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d, err := wav.Decode(g.audioContext, bytes.NewReader(raudio.Jab_wav))
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if err != nil {
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log.Fatal(err)
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}
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// Create an audio.Player that has one stream.
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g.audioPlayer, err = audio.NewPlayer(g.audioContext, d)
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if err != nil {
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log.Fatal(err)
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}
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}
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func (g *Game) Update() error {
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if ebiten.IsKeyPressed(ebiten.KeyP) && !g.audioPlayer.IsPlaying() {
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// As audioPlayer has one stream and remembers the playing position,
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// rewinding is needed before playing when reusing audioPlayer.
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g.audioPlayer.Rewind()
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g.audioPlayer.Play()
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}
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return nil
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}
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func (g *Game) Draw(screen *ebiten.Image) {
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if g.audioPlayer.IsPlaying() {
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ebitenutil.DebugPrint(screen, "Bump!")
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} else {
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ebitenutil.DebugPrint(screen, "Press P to play the wav")
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}
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}
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func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
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return screenWidth, screenHeight
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}
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func main() {
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ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
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ebiten.SetWindowTitle("WAV (Ebiten Demo)")
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if err := ebiten.RunGame(&g); err != nil {
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log.Fatal(err)
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}
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}
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