/*
- Copyright (C) 2014-2018 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2014-2019 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
#include "ffmpeg_image_proxy.h"
#include "image.h"
#include "config.h"
+#include "digester.h"
+#include "frame_interval_checker.h"
#include <dcp/dcp.h>
#include <dcp/cpl.h>
#include <dcp/reel.h>
using std::list;
using std::cout;
+using std::string;
using boost::shared_ptr;
using boost::dynamic_pointer_cast;
using boost::optional;
}
}
- if (old) {
- _reels = old->_reels;
+ /* We try to avoid re-scanning the DCP's files every time we make a new DCPDecoder; we do this
+ by re-using the _reels list. Before we do this we need to check that nothing too serious
+ has changed in the DCPContent.
- /* We might have gained a KDM since we made the Reel objects */
- if (_dcp_content->kdm ()) {
- dcp::DecryptedKDM k = decrypted_kdm ();
- BOOST_FOREACH (shared_ptr<dcp::Reel> i, _reels) {
- i->add (k);
- }
- }
+ We do this by storing a digest of the important bits of the DCPContent and then checking that's
+ the same before we re-use _reels.
+ */
+
+ _lazy_digest = calculate_lazy_digest (c);
+
+ if (old && old->lazy_digest() == _lazy_digest) {
+ _reels = old->_reels;
} else {
list<shared_ptr<dcp::CPL> > cpl_list = cpls ();
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;
}
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(),
);
++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().get_value_or(0), *decoder, size
);
{
_forced_reduction = reduction;
}
+
+string
+DCPDecoder::calculate_lazy_digest (shared_ptr<const DCPContent> c) const
+{
+ Digester d;
+ BOOST_FOREACH (boost::filesystem::path i, c->paths()) {
+ d.add (i.string());
+ }
+ if (_dcp_content->kdm()) {
+ d.add(_dcp_content->kdm()->id());
+ }
+ d.add (static_cast<bool>(c->cpl()));
+ if (c->cpl()) {
+ d.add (c->cpl().get());
+ }
+ return d.get ();
+}
+
+ContentTime
+DCPDecoder::position () const
+{
+ return ContentTime::from_frames(_offset, _dcp_content->active_video_frame_rate(film())) + _next;
+}