X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Faudio_ring_buffers.cc;h=1a216ab33749399fadf51b24eb3392a3b3ee895d;hb=9a97c1b4116d7fb80e8ab145c0cc738dbf14d617;hp=21c4b6a5c1084123c71d82706653615e96aab709;hpb=70684e31a96bd7d4c7b09d525902959345b76526;p=dcpomatic.git

diff --git a/src/lib/audio_ring_buffers.cc b/src/lib/audio_ring_buffers.cc
index 21c4b6a5c..1a216ab33 100644
--- a/src/lib/audio_ring_buffers.cc
+++ b/src/lib/audio_ring_buffers.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2016-2018 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2016-2021 Carl Hetherington <cth@carlh.net>
 
     This file is part of DCP-o-matic.
 
@@ -18,26 +18,29 @@
 
 */
 
+
 #include "audio_ring_buffers.h"
 #include "dcpomatic_assert.h"
 #include "exceptions.h"
-#include <boost/foreach.hpp>
 #include <iostream>
 
+
 using std::min;
 using std::cout;
 using std::make_pair;
 using std::pair;
 using std::list;
-using boost::shared_ptr;
+using std::shared_ptr;
 using boost::optional;
+using namespace dcpomatic;
+
 
 AudioRingBuffers::AudioRingBuffers ()
-	: _used_in_head (0)
 {
 
 }
 
+
 /** @param frame_rate Frame rate in use; this is only used to check timing consistency of the incoming data */
 void
 AudioRingBuffers::put (shared_ptr<const AudioBuffers> data, DCPTime time, int frame_rate)
@@ -56,6 +59,7 @@ AudioRingBuffers::put (shared_ptr<const AudioBuffers> data, DCPTime time, int fr
 	_buffers.push_back(make_pair(data, time));
 }
 
+
 /** @return time of the returned data; if it's not set this indicates an underrun */
 optional<DCPTime>
 AudioRingBuffers::get (float* out, int channels, int frames)
@@ -75,7 +79,7 @@ AudioRingBuffers::get (float* out, int channels, int frames)
 			return time;
 		}
 
-		pair<shared_ptr<const AudioBuffers>, DCPTime> front = _buffers.front ();
+		auto front = _buffers.front ();
 		if (!time) {
 			time = front.second + DCPTime::from_frames(_used_in_head, 48000);
 		}
@@ -103,6 +107,18 @@ AudioRingBuffers::get (float* out, int channels, int frames)
 	return time;
 }
 
+
+optional<DCPTime>
+AudioRingBuffers::peek () const
+{
+	boost::mutex::scoped_lock lm (_mutex);
+	if (_buffers.empty()) {
+		return {};
+	}
+	return _buffers.front().second;
+}
+
+
 void
 AudioRingBuffers::clear ()
 {
@@ -111,13 +127,14 @@ AudioRingBuffers::clear ()
 	_used_in_head = 0;
 }
 
+
 Frame
 AudioRingBuffers::size () const
 {
 	boost::mutex::scoped_lock lm (_mutex);
 	Frame s = 0;
-	for (list<pair<shared_ptr<const AudioBuffers>, DCPTime> >::const_iterator i = _buffers.begin(); i != _buffers.end(); ++i) {
-		s += i->first->frames();
+	for (auto const& i: _buffers) {
+		s += i.first->frames();
 	}
 	return s - _used_in_head;
 }