Decode entire in-memory file for WebAudio

media/filters/audio_file_reader.h

Index: media/filters/audio_file_reader.h
diff --git a/media/filters/audio_file_reader.h b/media/filters/audio_file_reader.h
index 1e42abd7b018fde25b2d6fce976fa26807de0b63..b920c9eb423dac1e29cea17bd2f4ac6bb4f9c781 100644
--- a/media/filters/audio_file_reader.h
+++ b/media/filters/audio_file_reader.h
@@ -38,6 +38,10 @@ class MEDIA_EXPORT AudioFileReader {
   bool Open();
   void Close();
 
+  // Returns true if (an estimated) duration of the audio data is
+  // known.  Must be called after Open();
+  bool HasKnownDuration() const;
+
   // After a call to Open(), attempts to fully fill |audio_bus| with decoded
   // audio data.  Any unfilled frames will be zeroed out.
   // |audio_data| must be of the same size as channels().
@@ -47,6 +51,8 @@ class MEDIA_EXPORT AudioFileReader {
   // <= audio_bus->frames()
   int Read(AudioBus* audio_bus);
 
+  std::unique_ptr<AudioBus> StreamingRead();
+
   // These methods can be called once Open() has been called.
   int channels() const { return channels_; }
   int sample_rate() const { return sample_rate_; }