audio: Use io.ReadSeeker instead of ReadSeekCloser

exp/audio/audio.go

@@ -20,13 +20,8 @@ import (
 	"github.com/hajimehoshi/ebiten/internal/audio"
 )
 
-type ReadSeekCloser interface {
-	io.ReadSeeker
-	io.Closer
-}
-
 type Player struct {
-	src        ReadSeekCloser
+	src        io.ReadSeeker
 	sampleRate int
 }
 
@@ -38,7 +33,7 @@ type Player struct {
 // without a header (e.g. RIFF header).
 //
 // TODO: Pass sample rate and num of channels.
-func NewPlayer(src ReadSeekCloser, sampleRate int) *Player {
+func NewPlayer(src io.ReadSeeker, sampleRate int) *Player {
 	return &Player{
 		src:        src,
 		sampleRate: sampleRate,

internal/audio/audio.go

@@ -18,15 +18,10 @@ import (
 	"io"
 )
 
-type ReadSeekCloser interface {
-	io.ReadSeeker
-	io.Closer
-}
-
 func Init() {
 	initialize()
 }
 
-func Play(src ReadSeekCloser, sampleRate int) error {
+func Play(src io.ReadSeeker, sampleRate int) error {
 	return play(src, sampleRate)
 }

internal/audio/audio_js.go

@@ -17,6 +17,7 @@
 package audio
 
 import (
+	"io"
 	"io/ioutil"
 
 	"github.com/gopherjs/gopherjs/js"
@@ -25,7 +26,7 @@ import (
 var context *js.Object
 
 type audioProcessor struct {
-	src        ReadSeekCloser
+	src        io.ReadSeeker
 	sampleRate int
 	position   float64
 }
@@ -68,7 +69,7 @@ func (a *audioProcessor) play() error {
 	return nil
 }
 
-func play(src ReadSeekCloser, sampleRate int) error {
+func play(src io.ReadSeeker, sampleRate int) error {
 	a := &audioProcessor{
 		src:        src,
 		sampleRate: sampleRate,

internal/audio/audio_openal.go

@@ -17,6 +17,7 @@
 package audio
 
 import (
+	"io"
 	"time"
 
 	"golang.org/x/mobile/exp/audio"
@@ -24,10 +25,18 @@ import (
 
 var players = map[*audio.Player]struct{}{}
 
-func play(src ReadSeekCloser, sampleRate int) error {
+type readSeekCloser struct {
+	io.ReadSeeker
+}
+
+func (r *readSeekCloser) Close() error {
+	return nil
+}
+
+func play(src io.ReadSeeker, sampleRate int) error {
 	// TODO: audio.NewPlayer interprets WAV header, which we don't want.
 	// Use OpenAL or native API instead.
-	p, err := audio.NewPlayer(src, audio.Stereo16, int64(sampleRate))
+	p, err := audio.NewPlayer(&readSeekCloser{src}, audio.Stereo16, int64(sampleRate))
 	if err != nil {
 		return err
 	}