/*
- Copyright (C) 2012-2018 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
*/
-#include "video_decoder.h"
+
+#include "compose.hpp"
+#include "frame_interval_checker.h"
#include "image.h"
-#include "raw_image_proxy.h"
-#include "film.h"
+#include "j2k_image_proxy.h"
#include "log.h"
-#include "compose.hpp"
-#include <boost/foreach.hpp>
+#include "raw_image_proxy.h"
+#include "video_decoder.h"
#include <iostream>
#include "i18n.h"
+
using std::cout;
-using std::list;
-using std::max;
-using std::back_inserter;
-using boost::shared_ptr;
-using boost::optional;
+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 decoder classes when they have a video frame ready.
- * @param frame Frame index within the content; this does not take into account 3D
- * so for 3D_ALTERNATE this value goes:
- * 0: frame 0 left
- * 1: frame 0 right
- * 2: frame 1 left
- * 3: frame 1 right
- * and so on.
- */
+
+/** Called by decoder classes when they have a video frame ready */
void
-VideoDecoder::emit (shared_ptr<const Film> film, shared_ptr<const ImageProxy> image, Frame decoder_frame)
+VideoDecoder::emit(shared_ptr<const Film> film, shared_ptr<const ImageProxy> image, ContentTime time)
{
if (ignore ()) {
return;
}
- /* Before we `re-write' the frame indexes of these incoming data we need to check for
- the case where the user has some 2D content which they have marked as 3D. With 3D
- we should get two frames for each frame index, but in this `bad' case we only get
- one. We need to throw an exception if this happens.
- */
-
- if (_content->video->frame_type() == VIDEO_FRAME_TYPE_3D) {
- if (_last_threed_frames.size() > 4) {
- _last_threed_frames.erase (_last_threed_frames.begin());
- }
- _last_threed_frames.push_back (decoder_frame);
- if (_last_threed_frames.size() == 4) {
- if (_last_threed_frames[0] != _last_threed_frames[1] || _last_threed_frames[2] != _last_threed_frames[3]) {
- 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)
- )
+ 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)
)
- );
- }
+ )
+ );
}
- }
- double const afr = _content->active_video_frame_rate(film);
-
- Frame frame;
- Eyes eyes = EYES_BOTH;
- if (!_position) {
- /* This is the first data we have received since initialisation or seek. Set
- the position based on the frame that was given. After this first time
- we just cound frames, since (as with audio) it seems that ContentTimes
- are unreliable from FFmpegDecoder. They are much better than audio times
- but still we get the occasional one which is duplicated. In this case
- ffmpeg seems to carry on regardless, processing the video frame as normal.
- If we drop the frame with the duplicated timestamp we obviously lose sync.
- */
- _position = ContentTime::from_frames (decoder_frame, afr);
- if (_content->video->frame_type() == VIDEO_FRAME_TYPE_3D_ALTERNATE) {
- frame = decoder_frame / 2;
- _last_emitted_eyes = EYES_RIGHT;
- } else {
- frame = decoder_frame;
- }
- } else {
- VideoFrameType const ft = _content->video->frame_type ();
- if (ft == VIDEO_FRAME_TYPE_3D_ALTERNATE || ft == VIDEO_FRAME_TYPE_3D) {
- DCPOMATIC_ASSERT (_last_emitted_eyes);
- if (_last_emitted_eyes.get() == EYES_RIGHT) {
- frame = _position->frames_round(afr) + 1;
- eyes = EYES_LEFT;
- } else {
- frame = _position->frames_round(afr);
- eyes = EYES_RIGHT;
- }
- } else {
- frame = _position->frames_round(afr) + 1;
+ if (_frame_interval_checker->guess() != FrameIntervalChecker::AGAIN) {
+ _frame_interval_checker.reset ();
}
}
- switch (_content->video->frame_type ()) {
- case VIDEO_FRAME_TYPE_2D:
- Data (ContentVideo (image, frame, EYES_BOTH, PART_WHOLE));
+ switch (vft) {
+ case VideoFrameType::TWO_D:
+ Data(ContentVideo(image, time, Eyes::BOTH, Part::WHOLE));
break;
- case VIDEO_FRAME_TYPE_3D:
+ case VideoFrameType::THREE_D:
{
- Data (ContentVideo (image, frame, eyes, PART_WHOLE));
- _last_emitted_frame = frame;
- _last_emitted_eyes = eyes;
+ 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;
}
- case VIDEO_FRAME_TYPE_3D_ALTERNATE:
+ case VideoFrameType::THREE_D_ALTERNATE:
{
- Data (ContentVideo (image, frame, eyes, PART_WHOLE));
+ 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;
}
- case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT:
- Data (ContentVideo (image, frame, EYES_LEFT, PART_LEFT_HALF));
- Data (ContentVideo (image, frame, EYES_RIGHT, PART_RIGHT_HALF));
+ 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 VIDEO_FRAME_TYPE_3D_TOP_BOTTOM:
- Data (ContentVideo (image, frame, EYES_LEFT, PART_TOP_HALF));
- Data (ContentVideo (image, frame, EYES_RIGHT, PART_BOTTOM_HALF));
+ 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 VIDEO_FRAME_TYPE_3D_LEFT:
- Data (ContentVideo (image, frame, EYES_LEFT, PART_WHOLE));
+ case VideoFrameType::THREE_D_LEFT:
+ Data(ContentVideo(image, time, Eyes::LEFT, Part::WHOLE));
break;
- case VIDEO_FRAME_TYPE_3D_RIGHT:
- Data (ContentVideo (image, frame, EYES_RIGHT, PART_WHOLE));
+ case VideoFrameType::THREE_D_RIGHT:
+ Data(ContentVideo(image, time, Eyes::RIGHT, Part::WHOLE));
break;
default:
DCPOMATIC_ASSERT (false);
}
- _position = ContentTime::from_frames (frame, afr);
+ _position = time;
}
+
void
VideoDecoder::seek ()
{
- _position = boost::optional<ContentTime>();
- _last_emitted_frame.reset ();
+ _position = boost::none;
_last_emitted_eyes.reset ();
+ _frame_interval_checker.reset (new FrameIntervalChecker());
}
projects / dcpomatic.git / blobdiff