diff --git a/services/audiomanager/managersource/src/daudio_source_manager.cpp b/services/audiomanager/managersource/src/daudio_source_manager.cpp
index 91f87529dbf738d6c83178089bdc6bcaf5a03f00..5612cdfa831b0970155cf523bf53dbfb7ad9d531 100644
--- a/services/audiomanager/managersource/src/daudio_source_manager.cpp
+++ b/services/audiomanager/managersource/src/daudio_source_manager.cpp
@@ -218,6 +218,10 @@ int32_t DAudioSourceManager::DoEnableDAudio(const std::string &args)
         sourceDev = audioDevMap_[devId].dev;
     }
     DHLOGI("Call source dev to enable daudio.");
+    if (sourceDev == nullptr) {
+        DHLOGE("Source dev is nullptr.");
+        return ERR_DH_AUDIO_FAILED;
+    }
     int32_t result = sourceDev->EnableDAudio(dhId, attrs);
     return OnEnableDAudio(devId, dhId, result);
 }
diff --git a/services/audiomanager/managersource/src/dmic_dev.cpp b/services/audiomanager/managersource/src/dmic_dev.cpp
index b746682640073a3eae3120affd93020b3ad95e0f..54cf54c8382a0bb9e404bca1719c186a1edf8857 100644
--- a/services/audiomanager/managersource/src/dmic_dev.cpp
+++ b/services/audiomanager/managersource/src/dmic_dev.cpp
@@ -390,7 +390,7 @@ void DMicDev::EnqueueThread()
 {
     writeIndex_ = 0;
     writeNum_ = 0;
-    int64_t timeIntervalns = paramHDF_.period * AUDIO_NS_PER_SECOND / AUDIO_MS_PER_SECOND;
+    int64_t timeIntervalns = static_cast<int64_t>(paramHDF_.period * AUDIO_NS_PER_SECOND / AUDIO_MS_PER_SECOND);
     DHLOGD("Enqueue thread start, lengthPerWrite length: %{public}d, interval: %{public}d.", lengthPerTrans_,
         paramHDF_.period);
     FillJitterQueue();
diff --git a/services/audiomanager/managersource/src/dspeaker_dev.cpp b/services/audiomanager/managersource/src/dspeaker_dev.cpp
index 232faebda868ba7e6693c8c76906f898262a56eb..7e6b65adc20252700adc37ed8a2019bb8724bbf5 100644
--- a/services/audiomanager/managersource/src/dspeaker_dev.cpp
+++ b/services/audiomanager/managersource/src/dspeaker_dev.cpp
@@ -371,7 +371,7 @@ void DSpeakerDev::EnqueueThread()
     readIndex_ = 0;
     readNum_ = 0;
     frameIndex_ = 0;
-    int64_t timeIntervalns = paramHDF_.period * AUDIO_NS_PER_SECOND / AUDIO_MS_PER_SECOND;
+    int64_t timeIntervalns = static_cast<int64_t>(paramHDF_.period * AUDIO_NS_PER_SECOND / AUDIO_MS_PER_SECOND);
     DHLOGI("Enqueue thread start, lengthPerRead length: %{public}d, interval: %{pubic}d.", lengthPerTrans_,
         paramHDF_.period);
     while (ashmem_ != nullptr && isEnqueueRunning_.load()) {