X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fvideo_decoder.cc;h=3a88911118e4054bf2c2d2eecae6b59a50fa055a;hb=c4b409be0183508431e7ddbe4ad9bafe1f78a88e;hp=086a6b552c8cea76153b991f2ff0de1d0ff2eca5;hpb=f45cbb73068321d857249aaa21f770b87493c7c2;p=dcpomatic.git diff --git a/src/lib/video_decoder.cc b/src/lib/video_decoder.cc index 086a6b552..c628fddd9 100644 --- a/src/lib/video_decoder.cc +++ b/src/lib/video_decoder.cc @@ -1,123 +1,140 @@ /* - Copyright (C) 2012 Carl Hetherington + Copyright (C) 2012-2021 Carl Hetherington - This program is free software; you can redistribute it and/or modify + This file is part of DCP-o-matic. + + DCP-o-matic is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. - This program is distributed in the hope that it will be useful, + DCP-o-matic is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + along with DCP-o-matic. If not, see . */ -#include "video_decoder.h" -#include "subtitle.h" -#include "film.h" + +#include "compose.hpp" +#include "frame_interval_checker.h" #include "image.h" -#include "ratio.h" +#include "j2k_image_proxy.h" +#include "log.h" +#include "raw_image_proxy.h" +#include "video_decoder.h" +#include #include "i18n.h" + using std::cout; -using boost::shared_ptr; - -VideoDecoder::VideoDecoder (shared_ptr f, shared_ptr c) - : Decoder (f) - , _next_video (0) - , _video_content (c) - , _frame_rate_conversion (c->video_frame_rate(), f->dcp_video_frame_rate()) - , _odd (false) +using std::dynamic_pointer_cast; +using std::shared_ptr; +using namespace dcpomatic; + + +VideoDecoder::VideoDecoder (Decoder* parent, shared_ptr c) + : DecoderPart (parent) + , _content (c) + , _frame_interval_checker (new FrameIntervalChecker()) { } -/** Called by subclasses when some video is ready. - * @param image frame to emit. - * @param same true if this frame is the same as the last one passed to this call. - * @param t Time of the frame within the source. - */ + +/** Called by decoder classes when they have a video frame ready */ void -VideoDecoder::video (shared_ptr image, bool same, Time t) +VideoDecoder::emit(shared_ptr film, shared_ptr image, ContentTime time) { - if (_frame_rate_conversion.skip && _odd) { - _odd = !_odd; + if (ignore ()) { return; } - image->crop (_video_content->crop(), true); - - shared_ptr film = _film.lock (); - assert (film); - - libdcp::Size const container_size = film->container()->size (film->full_frame ()); - libdcp::Size const image_size = _video_content->ratio()->size (container_size); - - shared_ptr out = image->scale_and_convert_to_rgb (image_size, film->scaler(), true); - - shared_ptr sub; - if (_timed_subtitle && _timed_subtitle->displayed_at (t)) { - sub = _timed_subtitle->subtitle (); + auto const afr = _content->active_video_frame_rate(film); + auto const vft = _content->video->frame_type(); + + /* Do some heuristics to try and spot the case where the user sets content to 3D + * when it is not. We try to tell this by looking at the differences in time between + * the first few frames. Real 3D content should have two frames for each timestamp. + */ + if (_frame_interval_checker) { + _frame_interval_checker->feed(time, afr); + if (_frame_interval_checker->guess() == FrameIntervalChecker::PROBABLY_NOT_3D && vft == VideoFrameType::THREE_D) { + boost::throw_exception ( + DecodeError( + String::compose( + _("The content file %1 is set as 3D but does not appear to contain 3D images. Please set it to 2D. " + "You can still make a 3D DCP from this content by ticking the 3D option in the DCP video tab."), + _content->path(0) + ) + ) + ); + } + + if (_frame_interval_checker->guess() != FrameIntervalChecker::AGAIN) { + _frame_interval_checker.reset (); + } } - if (sub) { - Rect const tx = subtitle_transformed_area ( - float (image_size.width) / video_size().width, - float (image_size.height) / video_size().height, - sub->area(), film->subtitle_offset(), film->subtitle_scale() - ); - - shared_ptr im = sub->image()->scale (tx.size(), film->scaler(), true); - out->alpha_blend (im, tx.position()); + switch (vft) { + case VideoFrameType::TWO_D: + Data(ContentVideo(image, time, Eyes::BOTH, Part::WHOLE)); + break; + case VideoFrameType::THREE_D: + { + auto eyes = Eyes::LEFT; + auto j2k = dynamic_pointer_cast(image); + if (j2k && j2k->eye()) { + eyes = *j2k->eye() == dcp::Eye::LEFT ? Eyes::LEFT : Eyes::RIGHT; + } + + Data(ContentVideo(image, time, eyes, Part::WHOLE)); + break; } - - if (image_size != container_size) { - assert (image_size.width <= container_size.width); - assert (image_size.height <= container_size.height); - shared_ptr im (new SimpleImage (PIX_FMT_RGB24, container_size, true)); - im->make_black (); - im->copy (out, Position ((container_size.width - image_size.width) / 2, (container_size.height - image_size.height) / 2)); - out = im; + case VideoFrameType::THREE_D_ALTERNATE: + { + Eyes eyes; + if (_last_emitted_eyes) { + eyes = _last_emitted_eyes.get() == Eyes::LEFT ? Eyes::RIGHT : Eyes::LEFT; + } else { + /* We don't know what eye this frame is, so just guess */ + auto frame = time.frames_round(_content->video_frame_rate().get_value_or(24)); + eyes = (frame % 2) ? Eyes::RIGHT : Eyes::LEFT; + } + Data(ContentVideo(image, time, eyes, Part::WHOLE)); + _last_emitted_eyes = eyes; + break; } - - Video (out, same, t); - - if (_frame_rate_conversion.repeat) { - Video (image, true, t + film->video_frames_to_time (1)); - _next_video = t + film->video_frames_to_time (2); - } else { - _next_video = t + film->video_frames_to_time (1); + case VideoFrameType::THREE_D_LEFT_RIGHT: + Data(ContentVideo(image, time, Eyes::LEFT, Part::LEFT_HALF)); + Data(ContentVideo(image, time, Eyes::RIGHT, Part::RIGHT_HALF)); + break; + case VideoFrameType::THREE_D_TOP_BOTTOM: + Data(ContentVideo(image, time, Eyes::LEFT, Part::TOP_HALF)); + Data(ContentVideo(image, time, Eyes::RIGHT, Part::BOTTOM_HALF)); + break; + case VideoFrameType::THREE_D_LEFT: + Data(ContentVideo(image, time, Eyes::LEFT, Part::WHOLE)); + break; + case VideoFrameType::THREE_D_RIGHT: + Data(ContentVideo(image, time, Eyes::RIGHT, Part::WHOLE)); + break; + default: + DCPOMATIC_ASSERT (false); } - _odd = !_odd; + _position = time; } -/** Called by subclasses when a subtitle is ready. - * s may be 0 to say that there is no current subtitle. - * @param s New current subtitle, or 0. - */ -void -VideoDecoder::subtitle (shared_ptr s) -{ - _timed_subtitle = s; - - if (_timed_subtitle) { - Position const p = _timed_subtitle->subtitle()->position (); - _timed_subtitle->subtitle()->set_position (Position (p.x - _video_content->crop().left, p.y - _video_content->crop().top)); - } -} -bool -VideoDecoder::video_done () const +void +VideoDecoder::seek () { - shared_ptr film = _film.lock (); - assert (film); - - return (_video_content->length() - _next_video) < film->video_frames_to_time (1); + _position = boost::none; + _last_emitted_eyes.reset (); + _frame_interval_checker.reset (new FrameIntervalChecker()); }