Re-use assets verbatim if they do not need to change (#448).

1 files changed, 12 insertions, 5 deletions

diff --git a/src/lib/dcp_decoder.cc b/src/lib/dcp_decoder.cc
index 27d0f3a94..59dd7c008 100644
--- a/src/lib/dcp_decoder.cc
+++ b/src/lib/dcp_decoder.cc
@@ -28,6 +28,7 @@
 #include "dcp_decoder.h"
 #include "dcpomatic_log.h"
 #include "digester.h"
+#include "film.h"
 #include "ffmpeg_image_proxy.h"
 #include "frame_interval_checker.h"
 #include "image.h"
@@ -146,6 +147,12 @@ DCPDecoder::DCPDecoder(shared_ptr<const Film> film, shared_ptr<const DCPContent>
 
 	_font_id_allocator.add_fonts_from_reels(_reels);
 	_font_id_allocator.allocate();
+
+	_can_reuse_video = _dcp_content->can_reuse_video(film) && !film->reencode_j2k();
+	_can_reuse_audio = _dcp_content->can_reuse_audio(film);
+	for (int i = 0; i < static_cast<int>(TextType::COUNT); ++i) {
+		_can_reuse_text[i] = _dcp_content->can_reuse_text(film, static_cast<TextType>(i));
+	}
 }
 
 
@@ -176,7 +183,7 @@ DCPDecoder::pass()
 	*/
 	pass_texts(_next, picture_asset->size());
 
-	if ((_j2k_mono_reader || _j2k_stereo_reader || _mpeg2_mono_reader) && (_decode_reusable || !_dcp_content->reference_video())) {
+	if ((_j2k_mono_reader || _j2k_stereo_reader || _mpeg2_mono_reader) && (_decode_reusable || !_can_reuse_video)) {
 		auto const entry_point = (*_reel)->main_picture()->entry_point().get_value_or(0);
 		if (_j2k_mono_reader) {
 			video->emit(
@@ -233,7 +240,7 @@ DCPDecoder::pass()
 		}
 	}
 
-	if (_sound_reader && (_decode_reusable || !_dcp_content->reference_audio())) {
+	if (_sound_reader && (_decode_reusable || !_can_reuse_audio)) {
 		auto const entry_point = (*_reel)->main_sound()->entry_point().get_value_or(0);
 		auto sf = _sound_reader->get_frame(entry_point + frame);
 		auto from = sf->data();
@@ -331,7 +338,7 @@ DCPDecoder::pass_texts(
 	auto const asset = reel_asset->asset();
 	auto const entry_point = reel_asset->entry_point().get_value_or(0);
 
-	if (_decode_reusable || !_dcp_content->reference_text(type)) {
+	if (_decode_reusable || !_can_reuse_text[type]) {
 		auto subs = asset->texts_during(
 			dcp::Time(entry_point + frame, vfr, vfr),
 			dcp::Time(entry_point + frame + 1, vfr, vfr),
@@ -522,10 +529,10 @@ DCPDecoder::set_decode_reusable(bool r)
 	_decode_reusable = r;
 
 	if (video) {
-		video->set_ignore(_dcp_content->reference_video() && !_decode_reusable);
+		video->set_ignore(_can_reuse_video && !_decode_reusable);
 	}
 	if (audio) {
-		audio->set_ignore(_dcp_content->reference_audio() && !_decode_reusable);
+		audio->set_ignore(_can_reuse_audio && !_decode_reusable);
 	}
 }