MediaCodecPlayer implementation (stage 5 - reconfiguration)

media/base/android/access_unit_queue.h

Index: media/base/android/access_unit_queue.h
diff --git a/media/base/android/access_unit_queue.h b/media/base/android/access_unit_queue.h
index 9fae42000f4924ae59e3f532ac92abd49fe31e2a..a566fbc02e328993b89e4d905f5ef2f7fae16cc7 100644
--- a/media/base/android/access_unit_queue.h
+++ b/media/base/android/access_unit_queue.h
@@ -70,6 +70,10 @@ class AccessUnitQueue {
   // There must be only one |Info| consumer at a time.
   Info GetInfo() const;
 
+  // Request to emulate config changes for some key frames.

[qinmin, 2015/08/20 19:41:25]

I don't understand this. Why is this function needed? what is the usecase?

+  void EmulateConfigChanges(bool value);
+  void SetLastConfigs(const DemuxerConfigs& configs);
+
   // For unit tests only. These methods are not thread safe.
   size_t NumChunksForTesting() const { return chunks_.size(); }
   void SetHistorySizeForTesting(size_t number_of_history_chunks);
@@ -79,6 +83,9 @@ class AccessUnitQueue {
   // incuding current. Logically these are units that have not been consumed.
   int GetUnconsumedAccessUnitLength() const;
 
+  // Clone and possibly split (when we emulate configs) the incoming data chunk.
+  std::vector<DemuxerData*> CloneData(const DemuxerData& data);
+
   // The queue of data chunks. It owns the chunks.
   typedef std::list<DemuxerData*> DataChunkQueue;
   DataChunkQueue chunks_;
@@ -95,6 +102,12 @@ class AccessUnitQueue {
   // Indicates that a unit with End Of Stream flag has been appended.
   bool has_eos_;
 
+  // Flag to generate artificial |kConfigChanged| for some key frames.
+  bool emulate_config_changes_;
+
+  // Last config change for emulation
+  DemuxerConfigs last_configs_;
+
   // The lock protects all fields together.
   mutable base::Lock lock_;