Add status parameter to DemuxerStream::ReadCB

media/base/audio_decoder.h

Index: media/base/audio_decoder.h
diff --git a/media/base/audio_decoder.h b/media/base/audio_decoder.h
index e435a1cf9f3993b164a2d5c3fde4b26921947252..e6f09ed24ede4df6cd649a86cfbe951e57ee0b5b 100644
--- a/media/base/audio_decoder.h
+++ b/media/base/audio_decoder.h
@@ -19,6 +19,13 @@ class DemuxerStream;
 class MEDIA_EXPORT AudioDecoder
     : public base::RefCountedThreadSafe<AudioDecoder> {
  public:
+  // Status codes for read operations.
+  enum Status {
+    kOk,
+    kAborted,
+    kDecodeError,
+  };
+
   // Initialize an AudioDecoder with the given DemuxerStream, executing the
   // callback upon completion.
   // statistics_cb is used to update global pipeline statistics.
@@ -36,7 +43,7 @@ class MEDIA_EXPORT AudioDecoder
   // indicate the end of the stream. A NULL buffer pointer indicates an aborted
   // Read(). This can happen if the DemuxerStream gets flushed and doesn't have
   // any more data to return.
-  typedef base::Callback<void(scoped_refptr<Buffer>)> ReadCB;
+  typedef base::Callback<void(Status, const scoped_refptr<Buffer>&)> ReadCB;
   virtual void Read(const ReadCB& read_cb) = 0;
 
   // Reset decoder state, dropping any queued encoded data.