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[dcpomatic.git] / src / lib / dcp_decoder.cc

diff --git a/src/lib/dcp_decoder.cc b/src/lib/dcp_decoder.cc
index 8179ef0096b7c1e4bd8a7852af36119c3cacb28d..e8ace8beedcfb61b2b0604103acd099c64e4b5d0 100644 (file)
--- a/src/lib/dcp_decoder.cc
+++ b/src/lib/dcp_decoder.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2014-2018 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2014-2020 Carl Hetherington <cth@carlh.net>
 
     This file is part of DCP-o-matic.
 
@@ -28,6 +28,7 @@
 #include "ffmpeg_image_proxy.h"
 #include "image.h"
 #include "config.h"
+#include "frame_interval_checker.h"
 #include <dcp/dcp.h>
 #include <dcp/cpl.h>
 #include <dcp/reel.h>
@@ -106,7 +107,14 @@ DCPDecoder::DCPDecoder (shared_ptr<const Film> film, shared_ptr<const DCPContent
 bool
 DCPDecoder::pass ()
 {
-       if (_reel == _reels.end () || !_dcp_content->can_be_played ()) {
+       if (!_dcp_content->can_be_played()) {
+               return true;
+       }
+
+       if (_reel == _reels.end()) {
+               if (audio) {
+                       audio->flush ();
+               }
                return true;
        }
 
@@ -204,8 +212,14 @@ void
 DCPDecoder::pass_texts (ContentTime next, dcp::Size size)
 {
        list<shared_ptr<TextDecoder> >::const_iterator decoder = text.begin ();
+       if (decoder == text.end()) {
+               /* It's possible that there is now a main subtitle but no TextDecoders, for example if
+                  the CPL has just changed but the TextContent's texts have not been recreated yet.
+               */
+               return;
+       }
+
        if ((*_reel)->main_subtitle()) {
-               DCPOMATIC_ASSERT (decoder != text.end ());
                pass_texts (
                        next,
                        (*_reel)->main_subtitle()->asset(),
@@ -216,8 +230,8 @@ DCPDecoder::pass_texts (ContentTime next, dcp::Size size)
                        );
                ++decoder;
        }
+
        BOOST_FOREACH (shared_ptr<dcp::ReelClosedCaptionAsset> i, (*_reel)->closed_captions()) {
-               DCPOMATIC_ASSERT (decoder != text.end ());
                pass_texts (
                        next, i->asset(), _dcp_content->reference_text(TEXT_CLOSED_CAPTION), i->entry_point(), *decoder, size
                        );
@@ -402,3 +416,9 @@ DCPDecoder::set_forced_reduction (optional<int> reduction)
 {
        _forced_reduction = reduction;
 }
+
+ContentTime
+DCPDecoder::position () const
+{
+       return ContentTime::from_frames(_offset, _dcp_content->active_video_frame_rate(film())) + _next;
+}