fixed the synchronized-audio corruption

internal/adapter/mxl/sync.go

@@ -13,8 +13,7 @@ import (
 )
 
 const (
-	DefaultSyncReadTimeout   = 200 * time.Millisecond
-	DefaultSyncBatchDuration = 10 * time.Millisecond
+	DefaultSyncReadTimeout = 200 * time.Millisecond
 )
 
 var ErrNativeSyncDifferentDomains = errors.New(
@@ -22,15 +21,13 @@ var ErrNativeSyncDifferentDomains = errors.New(
 )
 
 type SyncFactory struct {
-	ReadTimeout   time.Duration
-	BatchDuration time.Duration
-	open          func(string, string, string) (localSyncSource, error)
+	ReadTimeout time.Duration
+	open        func(string, string, string) (localSyncSource, error)
 }
 
 type localSyncSource interface {
 	NextSync(
 		context.Context,
-		uint64,
 		time.Duration,
 	) (source.Frame, source.AudioFrame, error)
 
@@ -41,7 +38,6 @@ type localSyncSource interface {
 type syncReader struct {
 	source          localSyncSource
 	readTimeout     time.Duration
-	audioBatch      uint64
 	rateNumerator   int64
 	rateDenominator int64
 }
@@ -118,25 +114,11 @@ func (f SyncFactory) OpenSync(
 	if readTimeout <= 0 {
 		readTimeout = DefaultSyncReadTimeout
 	}
-	batchDuration := f.BatchDuration
-	if batchDuration <= 0 {
-		batchDuration = DefaultSyncBatchDuration
-	}
 	audioRate := src.AudioRate()
-	batch, err := audioBatchSize(audioRate.Num, audioRate.Den, batchDuration)
-	if err != nil {
-		_ = src.Close()
-		return nil, &source.SourceError{
-			Op:   "calculate sync audio batch",
-			Kind: source.ErrorKindInvalidConfig,
-			Err:  err,
-		}
-	}
 
 	return &syncReader{
 		source:          src,
 		readTimeout:     readTimeout,
-		audioBatch:      batch,
 		rateNumerator:   audioRate.Num,
 		rateDenominator: audioRate.Den,
 	}, nil
@@ -145,7 +127,7 @@ func (f SyncFactory) OpenSync(
 func (r *syncReader) ReadSync(
 	ctx context.Context,
 ) (playback.SyncFrame, error) {
-	video, audio, err := r.source.NextSync(ctx, r.audioBatch, r.readTimeout)
+	video, audio, err := r.source.NextSync(ctx, r.readTimeout)
 	if err != nil {
 		return playback.SyncFrame{}, err
 	}