From 2d386f5010c5c70c53b306fa55a053268accac5d Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Mon, 3 Jul 2017 13:09:48 +0100
Subject: [PATCH] Don't create decoders if they are not necessary.

---
 src/lib/dcp_decoder.cc | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/lib/dcp_decoder.cc b/src/lib/dcp_decoder.cc
index 0b99e8dd0..c7294bda7 100644
--- a/src/lib/dcp_decoder.cc
+++ b/src/lib/dcp_decoder.cc
@@ -54,9 +54,12 @@ DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log)
 	, _decode_referenced (false)
 {
 	video.reset (new VideoDecoder (this, c, log));
-	audio.reset (new AudioDecoder (this, c->audio, log));
-
-	subtitle.reset (new SubtitleDecoder (this, c->subtitle, log));
+	if (c->audio) {
+		audio.reset (new AudioDecoder (this, c->audio, log));
+	}
+	if (c->subtitle) {
+		subtitle.reset (new SubtitleDecoder (this, c->subtitle, log));
+	}
 
 	shared_ptr<dcp::CPL> cpl;
 	BOOST_FOREACH (shared_ptr<dcp::CPL> i, cpls ()) {
-- 
2.30.2