From 0253b4e45c71a1c2e2a8bffaf1c3cb84a0a3e41a Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Thu, 3 Aug 2017 17:54:06 +0100
Subject: Basics of forced reduction of JPEG2000 decode resolution.

---
 src/lib/dcp_decoder.cc | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

(limited to 'src/lib/dcp_decoder.cc')

diff --git a/src/lib/dcp_decoder.cc b/src/lib/dcp_decoder.cc
index c7294bda7..ef40f2ec7 100644
--- a/src/lib/dcp_decoder.cc
+++ b/src/lib/dcp_decoder.cc
@@ -48,6 +48,7 @@ using std::list;
 using std::cout;
 using boost::shared_ptr;
 using boost::dynamic_pointer_cast;
+using boost::optional;
 
 DCPDecoder::DCPDecoder (shared_ptr<const DCPContent> c, shared_ptr<Log> log)
 	: DCP (c)
@@ -100,20 +101,39 @@ DCPDecoder::pass ()
 		if (_mono_reader) {
 			video->emit (
 				shared_ptr<ImageProxy> (
-					new J2KImageProxy (_mono_reader->get_frame (entry_point + frame), asset->size(), AV_PIX_FMT_XYZ12LE)
+					new J2KImageProxy (
+						_mono_reader->get_frame (entry_point + frame),
+						asset->size(),
+						AV_PIX_FMT_XYZ12LE,
+						_forced_reduction
+						)
 					),
 				_offset + frame
 				);
 		} else {
 			video->emit (
 				shared_ptr<ImageProxy> (
-					new J2KImageProxy (_stereo_reader->get_frame (entry_point + frame), asset->size(), dcp::EYE_LEFT, AV_PIX_FMT_XYZ12LE)),
+					new J2KImageProxy (
+						_stereo_reader->get_frame (entry_point + frame),
+						asset->size(),
+						dcp::EYE_LEFT,
+						AV_PIX_FMT_XYZ12LE,
+						_forced_reduction
+						)
+					),
 				_offset + frame
 				);
 
 			video->emit (
 				shared_ptr<ImageProxy> (
-					new J2KImageProxy (_stereo_reader->get_frame (entry_point + frame), asset->size(), dcp::EYE_RIGHT, AV_PIX_FMT_XYZ12LE)),
+					new J2KImageProxy (
+						_stereo_reader->get_frame (entry_point + frame),
+						asset->size(),
+						dcp::EYE_RIGHT,
+						AV_PIX_FMT_XYZ12LE,
+						_forced_reduction
+						)
+					),
 				_offset + frame
 				);
 		}
@@ -234,3 +254,9 @@ DCPDecoder::set_decode_referenced ()
 {
 	_decode_referenced = true;
 }
+
+void
+DCPDecoder::set_forced_reduction (optional<int> reduction)
+{
+	_forced_reduction = reduction;
+}
-- 
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