[webm] Don't reject seeks with EOS

The MediaDecoderStateMachine treat seek's EOS as fatal errors, so instead we always resolve the seek promise, and let the next GetSample return EOS.

1 files changed, 4 insertions, 0 deletions

diff --git a/dom/media/webm/WebMDemuxer.cpp b/dom/media/webm/WebMDemuxer.cpp
index 395262a2e..b54739c06 100644
--- a/dom/media/webm/WebMDemuxer.cpp
+++ b/dom/media/webm/WebMDemuxer.cpp
@@ -963,6 +963,10 @@ WebMTrackDemuxer::Seek(media::TimeUnit aTime)
   mParent->SeekInternal(mType, aTime);
   nsresult rv = mParent->GetNextPacket(mType, &mSamples);
   if (NS_FAILED(rv)) {
+    if (rv == NS_ERROR_DOM_MEDIA_END_OF_STREAM) {
+      // Ignore the error for now, the next GetSample will be rejected with EOS.
+      return SeekPromise::CreateAndResolve(media::TimeUnit(), __func__);
+    }
     return SeekPromise::CreateAndReject(rv, __func__);
   }
   mNeedKeyframe = true;