Bug 1540740 - part2 : using TimeUnit as input parameter for 'AdjustForStartTime()'. r=jya

There is no need to cast to `TimeUnit` to `int64` and then cast to `TimeUnit` again.

Differential Revision: https://phabricator.services.mozilla.com/D26758

--HG--
extra : moz-landing-system : lando

dom/media/MediaData.cpp

@@ -56,12 +56,10 @@ Span<AudioDataValue> AudioData::Data() const {
   return MakeSpan(GetAdjustedData(), mFrames * mChannels);
 }
 
-bool AudioData::AdjustForStartTime(int64_t aStartTime) {
-  const TimeUnit startTimeOffset =
-      media::TimeUnit::FromMicroseconds(aStartTime);
-  mOriginalTime -= startTimeOffset;
+bool AudioData::AdjustForStartTime(const media::TimeUnit& aStartTime) {
+  mOriginalTime -= aStartTime;
   if (mTrimWindow) {
-    *mTrimWindow -= startTimeOffset;
+    *mTrimWindow -= aStartTime;
   }
   return MediaData::AdjustForStartTime(aStartTime) && mOriginalTime.IsValid();
 }

dom/media/MediaData.h

@@ -298,8 +298,8 @@ class MediaData {
 
   // Return true if the adjusted time is valid. Caller should handle error when
   // the result is invalid.
-  virtual bool AdjustForStartTime(int64_t aStartTime) {
-    mTime -= media::TimeUnit::FromMicroseconds(aStartTime);
+  virtual bool AdjustForStartTime(const media::TimeUnit& aStartTime) {
+    mTime -= aStartTime;
     return mTime.IsValid();
   }
 
@@ -371,7 +371,7 @@ class AudioData : public MediaData {
 
   // Return true if the adjusted time is valid. Caller should handle error when
   // the result is invalid.
-  bool AdjustForStartTime(int64_t aStartTime) override;
+  bool AdjustForStartTime(const media::TimeUnit& aStartTime) override;
 
   const uint32_t mChannels;
   // The AudioConfig::ChannelLayout map. Channels are ordered as per SMPTE

dom/media/ReaderProxy.cpp

@@ -43,7 +43,7 @@ RefPtr<ReaderProxy::AudioDataPromise> ReaderProxy::OnAudioDataRequestCompleted(
     RefPtr<AudioData> aAudio) {
   MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
 
-  if (aAudio->AdjustForStartTime(StartTime().ToMicroseconds())) {
+  if (aAudio->AdjustForStartTime(StartTime())) {
     return AudioDataPromise::CreateAndResolve(aAudio.forget(), __func__);
   }
   return AudioDataPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_OVERFLOW_ERR,
@@ -76,7 +76,7 @@ RefPtr<ReaderProxy::VideoDataPromise> ReaderProxy::RequestVideoData(
                              ? aTimeThreshold + StartTime()
                              : aTimeThreshold;
 
-  int64_t startTime = StartTime().ToMicroseconds();
+  auto startTime = StartTime();
   return InvokeAsync(mReader->OwnerThread(), mReader.get(), __func__,
                      &MediaFormatReader::RequestVideoData, threshold)
       ->Then(