Chrome-side implementation of media source timestamp offset

media/filters/chunk_demuxer.cc

Index: media/filters/chunk_demuxer.cc
diff --git a/media/filters/chunk_demuxer.cc b/media/filters/chunk_demuxer.cc
index 06a8d62923e6fa9d98e90db81d32968681a404b6..db9ef8f93654f5c2d288221bf0ee325861c9dfa2 100644
--- a/media/filters/chunk_demuxer.cc
+++ b/media/filters/chunk_demuxer.cc
@@ -99,7 +99,7 @@ static bool IsSupported(const std::string& type,
   *has_audio = false;
   *has_video = false;
 
-  // Search for the SupportedTypeInfo for |type|
+  // Search for the SupportedTypeInfo for |type|.
   for (size_t i = 0; i < arraysize(kSupportedTypeInfo); ++i) {
     const SupportedTypeInfo& type_info = kSupportedTypeInfo[i];
     if (type == type_info.type) {
@@ -759,6 +759,22 @@ void ChunkDemuxer::Abort(const std::string& id) {
   stream_parser_map_[id]->Flush();
 }
 
+void ChunkDemuxer::TimestampOffset(const std::string& id, float offset) {
+  DVLOG(1) << "TimestampOffset(" << id << ", " << offset << ")";
+  DCHECK_GT(stream_parser_map_.count(id), 0u);
+
+  TimeDelta time_offset = TimeDelta::FromMicroseconds(
+      offset * base::Time::kMicrosecondsPerSecond);
+  stream_parser_map_[id]->SetTimestampOffset(time_offset);
+}
+
+void ChunkDemuxer::ClearTimestampOffset(const std::string& id) {
+  DVLOG(1) << "ClearTimestampOffset(" << id << ")";
+  DCHECK_GT(stream_parser_map_.count(id), 0u);
+
+  stream_parser_map_[id]->ClearTimestampOffset();
+}
+
 bool ChunkDemuxer::EndOfStream(PipelineStatus status) {
   DVLOG(1) << "EndOfStream(" << status << ")";
   base::AutoLock auto_lock(lock_);