/*
- Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
- 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 <http://www.gnu.org/licenses/>.
*/
-#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 <iostream>
#include "i18n.h"
+
using std::cout;
-using boost::shared_ptr;
-
-VideoDecoder::VideoDecoder (shared_ptr<const Film> f, shared_ptr<const VideoContent> 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<const Content> 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> image, bool same, Time t)
+VideoDecoder::emit(shared_ptr<const Film> film, shared_ptr<const ImageProxy> image, ContentTime time)
{
- if (_frame_rate_conversion.skip && _odd) {
- _odd = !_odd;
+ if (ignore ()) {
return;
}
- image->crop (_video_content->crop(), true);
-
- shared_ptr<const Film> 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<Image> out = image->scale_and_convert_to_rgb (image_size, film->scaler(), true);
-
- shared_ptr<Subtitle> 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) {
- dcpomatic::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<Image> 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<const J2KImageProxy>(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<Image> 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<TimedSubtitle> 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<const Film> 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());
}
projects / dcpomatic.git / blobdiff