Don't start readahead until parsing the stream's header is finished

...but also disable readahead for now anyway, since it's unstable

1 files changed, 9 insertions, 0 deletions

diff --git a/src/codecs/include/codec.hpp b/src/codecs/include/codec.hpp
index 67358d54..87f6637c 100644
--- a/src/codecs/include/codec.hpp
+++ b/src/codecs/include/codec.hpp
@@ -49,6 +49,15 @@ class IStream {
 
   virtual auto CurrentPosition() -> int64_t = 0;
 
+  /*
+   * Called by codecs to indicate that they've finished parsing any header data
+   * within this stream, and are about to begin decoding.
+   * 
+   * Currently used as a hint to the readahead stream to begin prefetching file
+   * data.
+   */
+  virtual auto SetPreambleFinished() -> void {}
+
  protected:
   StreamType t_;
 };