X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fvideo_decoder.cc;h=cba21d280aae20a51fff025cb470fde6d3f5cb10;hb=f385ef03e5ea27519a31c0839447735a7fba0602;hp=99d711693e44fa942b268375f7f2f6bfda955c3e;hpb=9bdd8cc51942a13e360dde4efc04b3ca417c8b94;p=dcpomatic.git

diff --git a/src/lib/video_decoder.cc b/src/lib/video_decoder.cc
index 99d711693..cba21d280 100644
--- a/src/lib/video_decoder.cc
+++ b/src/lib/video_decoder.cc
@@ -21,98 +21,94 @@
 #include "subtitle.h"
 #include "film.h"
 #include "image.h"
-#include "log.h"
-#include "job.h"
+#include "ratio.h"
 
 #include "i18n.h"
 
+using std::cout;
 using boost::shared_ptr;
-using boost::optional;
 
-VideoDecoder::VideoDecoder (shared_ptr<const Film> f)
+VideoDecoder::VideoDecoder (shared_ptr<const Film> f, shared_ptr<const VideoContent> c)
 	: Decoder (f)
-	, _video_frame (0)
-	, _last_content_time (0)
+	, _next_video (0)
+	, _video_content (c)
+	, _frame_rate_conversion (c->video_frame_rate(), f->dcp_video_frame_rate())
+	, _odd (false)
 {
 
 }
 
-/** Called by subclasses to tell the world that some video data is ready.
- *  We find a subtitle then emit it for listeners.
+/** Called by subclasses when some video is ready.
  *  @param image frame to emit.
- *  @param t Time of the frame within the source, in seconds.
+ *  @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.
  */
 void
-VideoDecoder::emit_video (shared_ptr<Image> image, double t)
+VideoDecoder::video (shared_ptr<Image> image, bool same, Time t)
 {
+	if (_frame_rate_conversion.skip && _odd) {
+		_odd = !_odd;
+		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 ();
 	}
 
-	signal_video (image, false, sub, t);
-}
+	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()
+			);
 
-bool
-VideoDecoder::have_last_video () const
-{
-	return _last_image;
-}
-
-/** Called by subclasses to repeat the last video frame that we
- *  passed to emit_video().  If emit_video hasn't yet been called,
- *  we will generate a black frame.
- */
-void
-VideoDecoder::repeat_last_video (double t)
-{
-	if (!_last_image) {
-		_last_image.reset (new SimpleImage (pixel_format(), native_size(), true));
-		_last_image->make_black ();
+		shared_ptr<Image> im = sub->image()->scale (tx.size(), film->scaler(), true);
+		out->alpha_blend (im, tx.position());
 	}
 
-	signal_video (_last_image, true, _last_subtitle, t);
-}
-
-/** Emit our signal to say that some video data is ready.
- *  @param image Video frame.
- *  @param same true if `image' is the same as the last one we emitted.
- *  @param sub Subtitle for this frame, or 0.
- */
-void
-VideoDecoder::signal_video (shared_ptr<Image> image, bool same, shared_ptr<Subtitle> sub, double t)
-{
-	TIMING (N_("Decoder emits %1"), _video_frame);
-	Video (image, same, sub);
-	++_video_frame;
+	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;
+	}
+		
+	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);
+	}
 
-	_last_image = image;
-	_last_subtitle = sub;
-	_last_content_time = t;
+	_odd = !_odd;
 }
 
-/** Set up the current subtitle.  This will be put onto frames that
- *  fit within its time specification.  s may be 0 to say that there
- *  is no current subtitle.
+/** 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::emit_subtitle (shared_ptr<TimedSubtitle> s)
+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 - _film->crop().left, p.y - _film->crop().top));
-	}
-}
-
-void
-VideoDecoder::set_progress (Job* j) const
-{
-	assert (j);
-
-	if (_film->video_length()) {
-		j->set_progress (float (_video_frame) / _film->video_length());
+		_timed_subtitle->subtitle()->set_position (Position (p.x - _video_content->crop().left, p.y - _video_content->crop().top));
 	}
 }