audio/internal/readdriver: Bug fix: Wait for a while after finishing to write

Closes #1632

audio/internal/oboe/binding_android.cpp

@@ -57,11 +57,6 @@ public:
       std::lock_guard<std::mutex> lock(GetPlayersMutex());
       GetPlayers().insert(this);
     }
-    // Fill zeros with 1/60[s] as the first part to avoid noises (#1632).
-    // 1/60[s] is an arbitrary duration and might need to be adjusted.
-    size_t mul = channel_num_ * bit_depth_in_bytes_;
-    size_t size = (sample_rate_ * channel_num_ * bit_depth_in_bytes_) / 60 / mul * mul;
-    buf_.resize(size);
   }
 
   void SetVolume(double volume) {

audio/internal/readerdriver/driver_android.go

@@ -18,6 +18,7 @@ import (
 	"io"
 	"runtime"
 	"sync"
+	"time"
 
 	"github.com/hajimehoshi/ebiten/v2/audio/internal/oboe"
 )
@@ -268,6 +269,9 @@ func (p *player) loop() {
 
 		// Now p.p.Reset() doesn't close the stream gracefully. Then buffer size check is necessary here.
 		if err == io.EOF && p.UnplayedBufferSize() == 0 {
+			// Even when the unplayed buffer size is 0, the audio data in the hardware might not be played yet (#1632).
+			// Just wait for a while.
+			time.Sleep(100 * time.Millisecond)
 			p.Reset()
 			return
 		}