Experiment with more aggressive MSE GC on memory pressure

media/filters/chunk_demuxer.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/filters/chunk_demuxer.h"
 
 #include <algorithm>
 #include <limits>
 #include <utility>
 
@@ skipping 107 matching lines @@
   base::AutoLock auto_lock(lock_);
   stream_->Remove(start, end, duration);
 }
 
 bool ChunkDemuxerStream::EvictCodedFrames(DecodeTimestamp media_time,
                                           size_t newDataSize) {
   base::AutoLock auto_lock(lock_);
   return stream_->GarbageCollectIfNeeded(media_time, newDataSize);
 }
 
+void ChunkDemuxerStream::OnMemoryPressure(
+    DecodeTimestamp media_time,
+    base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level) {
+  base::AutoLock auto_lock(lock_);
+  return stream_->OnMemoryPressure(media_time, memory_pressure_level);
+}
+
 void ChunkDemuxerStream::OnSetDuration(TimeDelta duration) {
   base::AutoLock auto_lock(lock_);
   stream_->OnSetDuration(duration);
 }
 
 Ranges<TimeDelta> ChunkDemuxerStream::GetBufferedRanges(
     TimeDelta duration) const {
   base::AutoLock auto_lock(lock_);
 
   if (type_ == TEXT) {
@@ skipping 591 matching lines @@
       DCHECK_EQ(DemuxerStream::VIDEO, stream->type());
       stream->set_enabled(false, currTime);
     }
   }
   if (selected_stream) {
     DVLOG(1) << __func__ << ": enabling stream " << selected_stream;
     selected_stream->set_enabled(true, currTime);
   }
 }
 
+void ChunkDemuxer::OnMemoryPressure(
+    base::TimeDelta currentMediaTime,
+    base::MemoryPressureListener::MemoryPressureLevel memory_pressure_level) {
+  DecodeTimestamp media_time_dts =
+      DecodeTimestamp::FromPresentationTime(currentMediaTime);
+  base::AutoLock auto_lock(lock_);
+  for (const auto& itr : source_state_map_) {
+    itr.second->OnMemoryPressure(media_time_dts, memory_pressure_level);
+  }
+}
+
 bool ChunkDemuxer::EvictCodedFrames(const std::string& id,
                                     base::TimeDelta currentMediaTime,
                                     size_t newDataSize) {
   DVLOG(1) << __func__ << "(" << id << ")"
            << " media_time=" << currentMediaTime.InSecondsF()
            << " newDataSize=" << newDataSize;
   base::AutoLock auto_lock(lock_);
 
   // Note: The direct conversion from PTS to DTS is safe here, since we don't
   // need to know currentTime precisely for GC. GC only needs to know which GOP
@@ skipping 558 matching lines @@
 }
 
 void ChunkDemuxer::ShutdownAllStreams() {
   for (auto itr = source_state_map_.begin(); itr != source_state_map_.end();
        ++itr) {
     itr->second->Shutdown();
   }
 }
 
 }  // namespace media