audio/internal/readerdriver: Enable to return error at Suspend/Resume

audio/audio.go

@@ -127,15 +127,15 @@ func NewContext(sampleRate int) *Context {
 	h := getHook()
 	h.OnSuspendAudio(func() error {
 		c.semaphore <- struct{}{}
-		if s, ok := np.(interface{ suspend() }); ok {
-			s.suspend()
+		if s, ok := np.(interface{ suspend() error }); ok {
+			return s.suspend()
 		}
 		return nil
 	})
 	h.OnResumeAudio(func() error {
 		<-c.semaphore
-		if s, ok := np.(interface{ resume() }); ok {
-			s.resume()
+		if s, ok := np.(interface{ resume() error }); ok {
+			return s.resume()
 		}
 		return nil
 	})

audio/export_test.go

@@ -68,10 +68,12 @@ func (c *dummyReaderContext) MaxBufferSize() int {
 	return 48000 * channelNum * bitDepthInBytes / 4
 }
 
-func (c *dummyReaderContext) Suspend() {
+func (c *dummyReaderContext) Suspend() error {
+	return nil
 }
 
-func (c *dummyReaderContext) Resume() {
+func (c *dummyReaderContext) Resume() error {
+	return nil
 }
 
 func (c *dummyReaderContext) Close() error {

audio/internal/readerdriver/driver.go

@@ -21,8 +21,8 @@ import (
 type Context interface {
 	NewPlayer(io.Reader) Player
 	MaxBufferSize() int
-	Suspend()
-	Resume()
+	Suspend() error
+	Resume() error
 	io.Closer
 }
 

audio/internal/readerdriver/driver_js.go

@@ -139,12 +139,14 @@ func (c *context) MaxBufferSize() int {
 	return c.oneBufferSize() * 2
 }
 
-func (c *context) Suspend() {
+func (c *context) Suspend() error {
 	c.audioContext.Call("suspend")
+	return nil
 }
 
-func (c *context) Resume() {
+func (c *context) Resume() error {
 	c.audioContext.Call("resume")
+	return nil
 }
 
 func (p *player) Pause() {
@@ -307,12 +309,14 @@ func (w *go2cppDriverWrapper) MaxBufferSize() int {
 	return w.c.MaxBufferSize()
 }
 
-func (w *go2cppDriverWrapper) Suspend() {
+func (w *go2cppDriverWrapper) Suspend() error {
 	// Do nothing so far.
+	return nil
 }
 
-func (w *go2cppDriverWrapper) Resume() {
+func (w *go2cppDriverWrapper) Resume() error {
 	// Do nothing so far.
+	return nil
 }
 
 func (w *go2cppDriverWrapper) Close() error {

audio/readerplayer.go

@@ -60,18 +60,18 @@ func (f *readerPlayerFactory) newPlayerImpl(context *Context, src io.Reader) (pl
 	return p, nil
 }
 
-func (f *readerPlayerFactory) suspend() {
+func (f *readerPlayerFactory) suspend() error {
 	if f.context == nil {
-		return
+		return nil
 	}
-	f.context.Suspend()
+	return f.context.Suspend()
 }
 
-func (f *readerPlayerFactory) resume() {
+func (f *readerPlayerFactory) resume() error {
 	if f.context == nil {
-		return
+		return nil
 	}
-	f.context.Resume()
+	return f.context.Resume()
 }
 
 func (p *readerPlayer) ensurePlayer() error {