Merge master.

5 files changed, 182 insertions, 28 deletions

diff --git a/src/lib/film.cc b/src/lib/film.cc
index 475dd6844..268109921 100644
--- a/src/lib/film.cc
+++ b/src/lib/film.cc
@@ -92,6 +92,8 @@ using dcp::raw_convert;
  * Use <Scale> tag in <VideoContent> rather than <Ratio>.
  * 8 -> 9
  * DCI -> ISDCF
+ * 9 -> 10
+ * Subtitle X and Y scale.
  *
  * Bumped to 32 for 2.0 branch; some times are expressed in Times rather
  * than frames now.
diff --git a/src/lib/player.cc b/src/lib/player.cc
index e46d539f8..f83c9563b 100644
--- a/src/lib/player.cc
+++ b/src/lib/player.cc
@@ -201,7 +201,8 @@ Player::content_changed (weak_ptr<Content> w, int property, bool frequent)
 		property == SubtitleContentProperty::USE_SUBTITLES ||
 		property == SubtitleContentProperty::SUBTITLE_X_OFFSET ||
 		property == SubtitleContentProperty::SUBTITLE_Y_OFFSET ||
-		property == SubtitleContentProperty::SUBTITLE_SCALE ||
+		property == SubtitleContentProperty::SUBTITLE_X_SCALE ||
+		property == SubtitleContentProperty::SUBTITLE_Y_SCALE ||
 		property == VideoContentProperty::VIDEO_CROP ||
 		property == VideoContentProperty::VIDEO_SCALE ||
 		property == VideoContentProperty::VIDEO_FRAME_RATE
@@ -260,8 +261,8 @@ Player::transform_image_subtitles (list<ImageSubtitle> subs) const
 		 *     rect.x * _video_container_size.width and rect.y * _video_container_size.height.
 		 *
 		 * 2.  that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
-		 *     (width_before_subtitle_scale * (1 - subtitle_scale) / 2) and
-		 *     (height_before_subtitle_scale * (1 - subtitle_scale) / 2).
+		 *     (width_before_subtitle_scale * (1 - subtitle_x_scale) / 2) and
+		 *     (height_before_subtitle_scale * (1 - subtitle_y_scale) / 2).
 		 *
 		 * Combining these two translations gives these expressions.
 		 */
@@ -558,12 +559,12 @@ Player::get_subtitles (DCPTime time, DCPTime length, bool starting)
 			i->sub.rectangle.y += subtitle_content->subtitle_y_offset ();
 
 			/* Apply content's subtitle scale */
-			i->sub.rectangle.width *= subtitle_content->subtitle_scale ();
-			i->sub.rectangle.height *= subtitle_content->subtitle_scale ();
+			i->sub.rectangle.width *= subtitle_content->subtitle_x_scale ();
+			i->sub.rectangle.height *= subtitle_content->subtitle_y_scale ();
 
 			/* Apply a corrective translation to keep the subtitle centred after that scale */
-			i->sub.rectangle.x -= i->sub.rectangle.width * (subtitle_content->subtitle_scale() - 1);
-			i->sub.rectangle.y -= i->sub.rectangle.height * (subtitle_content->subtitle_scale() - 1);
+			i->sub.rectangle.x -= i->sub.rectangle.width * (subtitle_content->subtitle_x_scale() - 1);
+			i->sub.rectangle.y -= i->sub.rectangle.height * (subtitle_content->subtitle_y_scale() - 1);
 			
 			ps.image.push_back (i->sub);
 		}
diff --git a/src/lib/subtitle.cc b/src/lib/subtitle.cc
new file mode 100644
index 000000000..03d4ccf2f
--- /dev/null
+++ b/src/lib/subtitle.cc
@@ -0,0 +1,116 @@
+/*
+    Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
+
+    This program 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,
+    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.
+
+*/
+
+#include "subtitle.h"
+#include "subtitle_content.h"
+#include "piece.h"
+#include "image.h"
+#include "scaler.h"
+#include "film.h"
+
+using boost::shared_ptr;
+using boost::dynamic_pointer_cast;
+using boost::weak_ptr;
+
+Subtitle::Subtitle (shared_ptr<const Film> film, libdcp::Size video_container_size, weak_ptr<Piece> weak_piece, shared_ptr<Image> image, dcpomatic::Rect<double> rect, Time from, Time to)
+	: _piece (weak_piece)
+	, _in_image (image)
+	, _in_rect (rect)
+	, _in_from (from)
+	, _in_to (to)
+{
+	update (film, video_container_size);
+}
+
+void
+Subtitle::update (shared_ptr<const Film> film, libdcp::Size video_container_size)
+{
+	shared_ptr<Piece> piece = _piece.lock ();
+	if (!piece) {
+		return;
+	}
+
+	if (!_in_image) {
+		_out_image.reset ();
+		return;
+	}
+
+	shared_ptr<SubtitleContent> sc = dynamic_pointer_cast<SubtitleContent> (piece->content);
+	assert (sc);
+
+	dcpomatic::Rect<double> in_rect = _in_rect;
+	libdcp::Size scaled_size;
+
+	in_rect.x += sc->subtitle_x_offset ();
+	in_rect.y += sc->subtitle_y_offset ();
+
+	/* We will scale the subtitle up to fit _video_container_size, and also by the additional subtitle scale */
+	scaled_size.width = in_rect.width * video_container_size.width * sc->subtitle_x_scale ();
+	scaled_size.height = in_rect.height * video_container_size.height * sc->subtitle_y_scale ();
+
+	/* Then we need a corrective translation, consisting of two parts:
+	 *
+	 * 1.  that which is the result of the scaling of the subtitle by _video_container_size; this will be
+	 *     rect.x * _video_container_size.width and rect.y * _video_container_size.height.
+	 *
+	 * 2.  that to shift the origin of the scale by subtitle_scale to the centre of the subtitle; this will be
+	 *     (width_before_subtitle_scale * (1 - subtitle_x_scale) / 2) and
+	 *     (height_before_subtitle_scale * (1 - subtitle_y_scale) / 2).
+	 *
+	 * Combining these two translations gives these expressions.
+	 */
+	
+	_out_position.x = rint (video_container_size.width * (in_rect.x + (in_rect.width * (1 - sc->subtitle_x_scale ()) / 2)));
+	_out_position.y = rint (video_container_size.height * (in_rect.y + (in_rect.height * (1 - sc->subtitle_y_scale ()) / 2)));
+	
+	_out_image = _in_image->scale (
+		scaled_size,
+		Scaler::from_id ("bicubic"),
+		_in_image->pixel_format (),
+		true
+		);
+
+	/* XXX: hack */
+	Time from = _in_from;
+	Time to = _in_to;
+	shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> (piece->content);
+	if (vc) {
+		from = rint (from * vc->video_frame_rate() / film->video_frame_rate());
+		to = rint (to * vc->video_frame_rate() / film->video_frame_rate());
+	}
+	
+	_out_from = from + piece->content->position ();
+	_out_to = to + piece->content->position ();
+
+	check_out_to ();
+}
+
+bool
+Subtitle::covers (Time t) const
+{
+	return _out_from <= t && t <= _out_to;
+}
+
+void
+Subtitle::check_out_to ()
+{
+	if (_stop && _out_to > _stop.get ()) {
+		_out_to = _stop.get ();
+	}
+}
diff --git a/src/lib/subtitle_content.cc b/src/lib/subtitle_content.cc
index 0e5661945..5b370847b 100644
--- a/src/lib/subtitle_content.cc
+++ b/src/lib/subtitle_content.cc
@@ -35,15 +35,17 @@ using dcp::raw_convert;
 
 int const SubtitleContentProperty::SUBTITLE_X_OFFSET = 500;
 int const SubtitleContentProperty::SUBTITLE_Y_OFFSET = 501;
-int const SubtitleContentProperty::SUBTITLE_SCALE = 502;
-int const SubtitleContentProperty::USE_SUBTITLES = 503;
+int const SubtitleContentProperty::SUBTITLE_X_SCALE = 502;
+int const SubtitleContentProperty::SUBTITLE_Y_SCALE = 503;
+int const SubtitleContentProperty::USE_SUBTITLES = 504;
 
 SubtitleContent::SubtitleContent (shared_ptr<const Film> f)
 	: Content (f)
 	, _use_subtitles (false)
 	, _subtitle_x_offset (0)
 	, _subtitle_y_offset (0)
-	, _subtitle_scale (1)
+	, _subtitle_x_scale (1)
+	, _subtitle_y_scale (1)
 {
 
 }
@@ -53,7 +55,8 @@ SubtitleContent::SubtitleContent (shared_ptr<const Film> f, boost::filesystem::p
 	, _use_subtitles (false)
 	, _subtitle_x_offset (0)
 	, _subtitle_y_offset (0)
-	, _subtitle_scale (1)
+	, _subtitle_x_scale (1)
+	, _subtitle_y_scale (1)
 {
 
 }
@@ -63,7 +66,8 @@ SubtitleContent::SubtitleContent (shared_ptr<const Film> f, cxml::ConstNodePtr n
 	, _use_subtitles (false)
 	, _subtitle_x_offset (0)
 	, _subtitle_y_offset (0)
-	, _subtitle_scale (1)
+	, _subtitle_x_scale (1)
+	, _subtitle_y_scale (1)
 {
 	if (version >= 32) {
 		_use_subtitles = node->bool_child ("UseSubtitles");
@@ -77,8 +81,13 @@ SubtitleContent::SubtitleContent (shared_ptr<const Film> f, cxml::ConstNodePtr n
 	} else {
 		_subtitle_y_offset = node->number_child<float> ("SubtitleOffset");
 	}
-	
-	_subtitle_scale = node->number_child<float> ("SubtitleScale");
+
+	if (version >= 10) {
+		_subtitle_x_scale = node->number_child<float> ("SubtitleXScale");
+		_subtitle_y_scale = node->number_child<float> ("SubtitleYScale");
+	} else {
+		_subtitle_x_scale = _subtitle_y_scale = node->number_child<float> ("SubtitleScale");
+	}
 }
 
 SubtitleContent::SubtitleContent (shared_ptr<const Film> f, vector<shared_ptr<Content> > c)
@@ -102,15 +111,20 @@ SubtitleContent::SubtitleContent (shared_ptr<const Film> f, vector<shared_ptr<Co
 			throw JoinError (_("Content to be joined must have the same subtitle Y offset."));
 		}
 
-		if (sc->subtitle_scale() != ref->subtitle_scale()) {
-			throw JoinError (_("Content to be joined must have the same subtitle scale."));
+		if (sc->subtitle_x_scale() != ref->subtitle_x_scale()) {
+			throw JoinError (_("Content to be joined must have the same subtitle X scale."));
+		}
+
+		if (sc->subtitle_y_scale() != ref->subtitle_y_scale()) {
+			throw JoinError (_("Content to be joined must have the same subtitle Y scale."));
 		}
 	}
 
 	_use_subtitles = ref->use_subtitles ();
 	_subtitle_x_offset = ref->subtitle_x_offset ();
 	_subtitle_y_offset = ref->subtitle_y_offset ();
-	_subtitle_scale = ref->subtitle_scale ();
+	_subtitle_x_scale = ref->subtitle_x_scale ();
+	_subtitle_y_scale = ref->subtitle_y_scale ();
 }
 
 void
@@ -119,7 +133,8 @@ SubtitleContent::as_xml (xmlpp::Node* root) const
 	root->add_child("UseSubtitles")->add_child_text (raw_convert<string> (_use_subtitles));
 	root->add_child("SubtitleXOffset")->add_child_text (raw_convert<string> (_subtitle_x_offset));
 	root->add_child("SubtitleYOffset")->add_child_text (raw_convert<string> (_subtitle_y_offset));
-	root->add_child("SubtitleScale")->add_child_text (raw_convert<string> (_subtitle_scale));
+	root->add_child("SubtitleXScale")->add_child_text (raw_convert<string> (_subtitle_x_scale));
+	root->add_child("SubtitleYScale")->add_child_text (raw_convert<string> (_subtitle_y_scale));
 }
 
 void
@@ -153,13 +168,23 @@ SubtitleContent::set_subtitle_y_offset (double o)
 }
 
 void
-SubtitleContent::set_subtitle_scale (double s)
+SubtitleContent::set_subtitle_x_scale (double s)
+{
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_subtitle_x_scale = s;
+	}
+	signal_changed (SubtitleContentProperty::SUBTITLE_X_SCALE);
+}
+
+void
+SubtitleContent::set_subtitle_y_scale (double s)
 {
 	{
 		boost::mutex::scoped_lock lm (_mutex);
-		_subtitle_scale = s;
+		_subtitle_y_scale = s;
 	}
-	signal_changed (SubtitleContentProperty::SUBTITLE_SCALE);
+	signal_changed (SubtitleContentProperty::SUBTITLE_Y_SCALE);
 }
 
 string
@@ -167,7 +192,8 @@ SubtitleContent::identifier () const
 {
 	SafeStringStream s;
 	s << Content::identifier()
-	  << "_" << raw_convert<string> (subtitle_scale())
+	  << "_" << raw_convert<string> (subtitle_x_scale())
+	  << "_" << raw_convert<string> (subtitle_y_scale())
 	  << "_" << raw_convert<string> (subtitle_x_offset())
 	  << "_" << raw_convert<string> (subtitle_y_offset());
 
diff --git a/src/lib/subtitle_content.h b/src/lib/subtitle_content.h
index 97649f4d5..c3c25232f 100644
--- a/src/lib/subtitle_content.h
+++ b/src/lib/subtitle_content.h
@@ -27,7 +27,8 @@ class SubtitleContentProperty
 public:
 	static int const SUBTITLE_X_OFFSET;
 	static int const SUBTITLE_Y_OFFSET;
-	static int const SUBTITLE_SCALE;
+	static int const SUBTITLE_X_SCALE;
+	static int const SUBTITLE_Y_SCALE;
 	static int const USE_SUBTITLES;
 };
 
@@ -53,7 +54,8 @@ public:
 	void set_use_subtitles (bool);
 	void set_subtitle_x_offset (double);
 	void set_subtitle_y_offset (double);
-	void set_subtitle_scale (double);
+	void set_subtitle_x_scale (double);
+	void set_subtitle_y_scale (double);
 
 	bool use_subtitles () const {
 		boost::mutex::scoped_lock lm (_mutex);
@@ -70,9 +72,14 @@ public:
 		return _subtitle_y_offset;
 	}
 
-	double subtitle_scale () const {
+	double subtitle_x_scale () const {
 		boost::mutex::scoped_lock lm (_mutex);
-		return _subtitle_scale;
+		return _subtitle_x_scale;
+	}
+
+	double subtitle_y_scale () const {
+		boost::mutex::scoped_lock lm (_mutex);
+		return _subtitle_y_scale;
 	}
 
 private:
@@ -87,8 +94,10 @@ private:
 	 *  +ve is further down the frame, -ve is further up.
 	 */
 	double _subtitle_y_offset;
-	/** scale factor to apply to subtitles */
-	double _subtitle_scale;
+	/** x scale factor to apply to subtitles */
+	double _subtitle_x_scale;
+	/** y scale factor to apply to subtitles */
+	double _subtitle_y_scale;
 };
 
 #endif