X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Faudio_merger.h;h=756e5ab3120719fc8fd4e892891b947bbdf31ddb;hb=2e504b33eb9f38cac629ad31b7c107fb0cf5efda;hp=f068b504e8dcbff0c0215a146de00550480bea97;hpb=f58d9e44302151dea9f594acd9fc27a331fa77fb;p=dcpomatic.git

diff --git a/src/lib/audio_merger.h b/src/lib/audio_merger.h
index f068b504e..756e5ab31 100644
--- a/src/lib/audio_merger.h
+++ b/src/lib/audio_merger.h
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2014 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
@@ -17,102 +17,25 @@
 
 */
 
-#include "audio_buffers.h"
 #include "util.h"
 
-template <class T, class F>
+class AudioBuffers;
+
 class AudioMerger
 {
 public:
-	AudioMerger (int channels, boost::function<F (T)> t_to_f, boost::function<T (F)> f_to_t)
-		: _buffers (new AudioBuffers (channels, 0))
-		, _last_pull (0)
-		, _t_to_f (t_to_f)
-		, _f_to_t (f_to_t)
-	{}
+	AudioMerger (int channels, int frame_rate);
 
 	/** Pull audio up to a given time; after this call, no more data can be pushed
 	 *  before the specified time.
 	 */
-	TimedAudioBuffers<T>
-	pull (T time)
-	{
-		assert (time >= _last_pull);
-		
-		TimedAudioBuffers<T> out;
-		
-		F const to_return = _t_to_f (time - _last_pull);
-		out.audio.reset (new AudioBuffers (_buffers->channels(), to_return));
-		/* And this is how many we will get from our buffer */
-		F const to_return_from_buffers = min (to_return, _buffers->frames ());
-		
-		/* Copy the data that we have to the back end of the return buffer */
-		out.audio->copy_from (_buffers.get(), to_return_from_buffers, 0, to_return - to_return_from_buffers);
-		/* Silence any gap at the start */
-		out.audio->make_silent (0, to_return - to_return_from_buffers);
-		
-		out.time = _last_pull;
-		_last_pull = time;
-		
-		/* And remove the data we're returning from our buffers */
-		if (_buffers->frames() > to_return_from_buffers) {
-			_buffers->move (to_return_from_buffers, 0, _buffers->frames() - to_return_from_buffers);
-		}
-		_buffers->set_frames (_buffers->frames() - to_return_from_buffers);
-
-		return out;
-	}
-
-	void
-	push (boost::shared_ptr<const AudioBuffers> audio, T time)
-	{
-		assert (time >= _last_pull);
-
-		F frame = _t_to_f (time);
-		F after = max (_buffers->frames(), frame + audio->frames() - _t_to_f (_last_pull));
-		_buffers->ensure_size (after);
-		_buffers->accumulate_frames (audio.get(), 0, frame - _t_to_f (_last_pull), audio->frames ());
-		_buffers->set_frames (after);
-	}
-
-	F min (F a, int b)
-	{
-		if (a < b) {
-			return a;
-		}
-
-		return b;
-	}
-
-	F max (int a, F b)
-	{
-		if (a > b) {
-			return a;
-		}
-
-		return b;
-	}
-		
-	TimedAudioBuffers<T>
-	flush ()
-	{
-		if (_buffers->frames() == 0) {
-			return TimedAudioBuffers<T> ();
-		}
-
-		return TimedAudioBuffers<T> (_buffers, _last_pull);
-	}
-
-	void
-	clear (DCPTime t)
-	{
-		_last_pull = t;
-		_buffers.reset (new AudioBuffers (_buffers->channels(), 0));
-	}
+	TimedAudioBuffers pull (DCPTime time);
+	void push (boost::shared_ptr<const AudioBuffers> audio, DCPTime time);
+	TimedAudioBuffers flush ();
+	void clear (DCPTime t);
 	
 private:
 	boost::shared_ptr<AudioBuffers> _buffers;
-	T _last_pull;
-	boost::function<F (T)> _t_to_f;
-	boost::function<T (F)> _f_to_t;
+	int _frame_rate;
+	DCPTime _last_pull;
 };