X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fdecoder.h;h=10bb4531032e4d0068340b14c985d9b401ac2fb5;hb=bd81f33a39c6d20e78fce0d5be3b2d487b6df344;hp=18f612e538c5e645470c33cfcca91175a58a0b13;hpb=f0edd6ab35c3c2b7800a26ec8206adab75e5f633;p=dcpomatic.git

diff --git a/src/lib/decoder.h b/src/lib/decoder.h
index 18f612e53..10bb45310 100644
--- a/src/lib/decoder.h
+++ b/src/lib/decoder.h
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2012-2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -24,11 +24,9 @@
 #ifndef DCPOMATIC_DECODER_H
 #define DCPOMATIC_DECODER_H
 
-#include <boost/shared_ptr.hpp>
-#include <boost/weak_ptr.hpp>
-#include <boost/utility.hpp>
 #include "types.h"
 #include "dcpomatic_time.h"
+#include <boost/utility.hpp>
 
 class Decoded;
 
@@ -40,16 +38,27 @@ class Decoder : public boost::noncopyable
 public:
 	virtual ~Decoder () {}
 
-protected:	
+protected:
+	friend class AudioDecoderStream;
+
 	/** Seek so that the next pass() will yield the next thing
 	 *  (video/sound frame, subtitle etc.) at or after the requested
-	 *  time.  Pass accurate = true to try harder to get close to
-	 *  the request.  Note that seeking to time t may mean that
-	 *  the next pass() yields, for example, audio at time t and then
-	 *  video before it.
+	 *  time.  Pass accurate = true to try harder to ensure that, at worst,
+	 *  the next thing we yield comes before `time'.  This may entail
+	 *  seeking some way before `time' to be on the safe side.
+	 *  Alternatively, if seeking is 100% accurate for this decoder,
+	 *  it may seek to just the right spot.
 	 */
 	virtual void seek (ContentTime time, bool accurate) = 0;
-	virtual bool pass () = 0;
+
+	enum PassReason {
+		PASS_REASON_VIDEO,
+		PASS_REASON_AUDIO,
+		PASS_REASON_SUBTITLE
+	};
+
+	/** @return true if this decoder has already returned all its data and will give no more */
+	virtual bool pass (PassReason, bool accurate) = 0;
 };
 
 #endif