Add live mode detection in WebM MediaSource parser.

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 4bcfe28a55c06be40c42328d376728a61262496d..f476602d613798146566fb20c20a1619d0f5237d 100644
--- a/media/filters/chunk_demuxer.cc
+++ b/media/filters/chunk_demuxer.cc
@@ -975,6 +975,7 @@ ChunkDemuxer::ChunkDemuxer(const base::Closure& open_cb,
       log_cb_(log_cb),
       duration_(kNoTimestamp()),
       user_specified_duration_(-1),
+      live_mode_(false),
       splice_frames_enabled_(splice_frames_enabled) {
   DCHECK(!open_cb_.is_null());
   DCHECK(!need_key_cb_.is_null());
@@ -1065,6 +1066,10 @@ base::Time ChunkDemuxer::GetTimelineOffset() const {
   return timeline_offset_;
 }
 
+bool ChunkDemuxer::IsLiveMode() const {
+  return live_mode_;
+}
+
 void ChunkDemuxer::StartWaitingForSeek(TimeDelta seek_time) {
   DVLOG(1) << "StartWaitingForSeek()";
   base::AutoLock auto_lock(lock_);
@@ -1509,6 +1514,8 @@ void ChunkDemuxer::OnSourceInitDone(
     timeline_offset_ = params.timeline_offset;
   }
 
+  live_mode_ |= params.live_mode;

[acolwell GONE FROM CHROMIUM, 2014/04/24 21:14:16]

I feel like we should enforce an all the same or error like timeline_offset_
does. Perhaps use an enum { NotSet, Live, NotLive} for live_mode_. and signal an
error if we get inconsistent values for params.live_mode.

[Sergey Ulanov, 2014/04/24 23:17:45]

Done.

+
   // Wait until all streams have initialized.
   if ((!source_id_audio_.empty() && !audio_) ||
       (!source_id_video_.empty() && !video_)) {