X-Git-Url: https://main.carlh.net/gitweb/?p=dcpomatic.git;a=blobdiff_plain;f=src%2Flib%2Fdcp_decoder.cc;h=ab724cd6c75bbb7a5f02326e15b92f3a964a0322;hp=85dd280064ac02d8743420edee9cdf31e7a02552;hb=60f3f8ff110d55e0d720784dd40c9bc62d342d2c;hpb=6e5c998593842ff76f5d0ae5cab0d03cbe11b607 diff --git a/src/lib/dcp_decoder.cc b/src/lib/dcp_decoder.cc index 85dd28006..ab724cd6c 100644 --- a/src/lib/dcp_decoder.cc +++ b/src/lib/dcp_decoder.cc @@ -1,5 +1,5 @@ /* - Copyright (C) 2014-2018 Carl Hetherington + Copyright (C) 2014-2019 Carl Hetherington This file is part of DCP-o-matic. @@ -28,6 +28,8 @@ #include "ffmpeg_image_proxy.h" #include "image.h" #include "config.h" +#include "digester.h" +#include "frame_interval_checker.h" #include #include #include @@ -44,6 +46,7 @@ #include #include #include +#include #include #include @@ -51,50 +54,69 @@ using std::list; using std::cout; +using std::string; using boost::shared_ptr; using boost::dynamic_pointer_cast; using boost::optional; +using namespace dcpomatic; -DCPDecoder::DCPDecoder (shared_ptr film, shared_ptr c, bool fast) - : DCP (c) +DCPDecoder::DCPDecoder (shared_ptr film, shared_ptr c, bool fast, bool tolerant, shared_ptr old) + : DCP (c, tolerant) , Decoder (film) , _decode_referenced (false) { - if (c->video) { - video.reset (new VideoDecoder (this, c)); - } - if (c->audio) { - audio.reset (new AudioDecoder (this, c->audio, fast)); - } - BOOST_FOREACH (shared_ptr i, c->text) { - /* XXX: this time here should be the time of the first subtitle, not 0 */ - text.push_back (shared_ptr (new TextDecoder (this, i, ContentTime()))); + if (c->can_be_played()) { + if (c->video) { + video.reset (new VideoDecoder (this, c)); + } + if (c->audio) { + audio.reset (new AudioDecoder (this, c->audio, fast)); + } + BOOST_FOREACH (shared_ptr i, c->text) { + /* XXX: this time here should be the time of the first subtitle, not 0 */ + text.push_back (shared_ptr (new TextDecoder (this, i, ContentTime()))); + } } - list > cpl_list = cpls (); + /* 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. - if (cpl_list.empty()) { - throw DCPError (_("No CPLs found in DCP.")); - } + 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 { - shared_ptr cpl; - BOOST_FOREACH (shared_ptr i, cpl_list) { - if (_dcp_content->cpl() && i->id() == _dcp_content->cpl().get()) { - cpl = i; + list > cpl_list = cpls (); + + if (cpl_list.empty()) { + throw DCPError (_("No CPLs found in DCP.")); } - } - if (!cpl) { - /* No CPL found; probably an old file that doesn't specify it; - just use the first one. - */ - cpl = cpls().front (); + shared_ptr cpl; + BOOST_FOREACH (shared_ptr i, cpl_list) { + if (_dcp_content->cpl() && i->id() == _dcp_content->cpl().get()) { + cpl = i; + } + } + + if (!cpl) { + /* No CPL found; probably an old file that doesn't specify it; + just use the first one. + */ + cpl = cpls().front (); + } + + _reels = cpl->reels (); } set_decode_referenced (false); - _reels = cpl->reels (); - _reel = _reels.begin (); _offset = 0; get_readers (); @@ -104,7 +126,14 @@ DCPDecoder::DCPDecoder (shared_ptr film, shared_ptrcan_be_played ()) { + if (!_dcp_content->can_be_played()) { + return true; + } + + if (_reel == _reels.end()) { + if (audio) { + audio->flush (); + } return true; } @@ -122,7 +151,7 @@ DCPDecoder::pass () pass_texts (_next, picture_asset->size()); if ((_mono_reader || _stereo_reader) && (_decode_referenced || !_dcp_content->reference_video())) { - int64_t const entry_point = (*_reel)->main_picture()->entry_point (); + int64_t const entry_point = (*_reel)->main_picture()->entry_point().get_value_or(0); if (_mono_reader) { video->emit ( film(), @@ -168,7 +197,7 @@ DCPDecoder::pass () } if (_sound_reader && (_decode_referenced || !_dcp_content->reference_audio())) { - int64_t const entry_point = (*_reel)->main_sound()->entry_point (); + int64_t const entry_point = (*_reel)->main_sound()->entry_point().get_value_or(0); shared_ptr sf = _sound_reader->get_frame (entry_point + frame); uint8_t const * from = sf->data (); @@ -202,22 +231,28 @@ void DCPDecoder::pass_texts (ContentTime next, dcp::Size size) { list >::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(), _dcp_content->reference_text(TEXT_OPEN_SUBTITLE), - (*_reel)->main_subtitle()->entry_point(), + (*_reel)->main_subtitle()->entry_point().get_value_or(0), *decoder, size ); ++decoder; } + BOOST_FOREACH (shared_ptr 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 + next, i->asset(), _dcp_content->reference_text(TEXT_CLOSED_CAPTION), i->entry_point().get_value_or(0), *decoder, size ); ++decoder; } @@ -294,7 +329,7 @@ DCPDecoder::pass_texts ( void DCPDecoder::next_reel () { - _offset += (*_reel)->main_picture()->duration(); + _offset += (*_reel)->main_picture()->actual_duration(); ++_reel; get_readers (); } @@ -357,8 +392,12 @@ DCPDecoder::seek (ContentTime t, bool accurate) /* Seek to pre-roll position */ - while (_reel != _reels.end() && pre >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate(film()))) { - ContentTime rd = ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate(film())); + while ( + _reel != _reels.end() && + pre >= ContentTime::from_frames ((*_reel)->main_picture()->actual_duration(), _dcp_content->active_video_frame_rate(film())) + ) { + + ContentTime rd = ContentTime::from_frames ((*_reel)->main_picture()->actual_duration(), _dcp_content->active_video_frame_rate(film())); pre -= rd; t -= rd; next_reel (); @@ -374,8 +413,12 @@ DCPDecoder::seek (ContentTime t, bool accurate) /* Seek to correct position */ - while (_reel != _reels.end() && t >= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate(film()))) { - t -= ContentTime::from_frames ((*_reel)->main_picture()->duration(), _dcp_content->active_video_frame_rate(film())); + while ( + _reel != _reels.end() && + t >= ContentTime::from_frames ((*_reel)->main_picture()->actual_duration(), _dcp_content->active_video_frame_rate(film())) + ) { + + t -= ContentTime::from_frames ((*_reel)->main_picture()->actual_duration(), _dcp_content->active_video_frame_rate(film())); next_reel (); } @@ -400,3 +443,26 @@ DCPDecoder::set_forced_reduction (optional reduction) { _forced_reduction = reduction; } + +string +DCPDecoder::calculate_lazy_digest (shared_ptr 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(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; +}