Use PNG for thumbs so that we get alpha blending in wxwidgets.

8 files changed, 161 insertions, 58 deletions

diff --git a/src/lib/film.cc b/src/lib/film.cc
index 1e23c4d6b..08ef938d1 100644
--- a/src/lib/film.cc
+++ b/src/lib/film.cc
@@ -30,7 +30,7 @@
 #include <boost/lexical_cast.hpp>
 #include "film.h"
 #include "format.h"
-#include "tiff_encoder.h"
+#include "imagemagick_encoder.h"
 #include "job.h"
 #include "filter.h"
 #include "transcoder.h"
@@ -397,7 +397,7 @@ Film::update_thumbs_post_gui ()
 		string const l = i->leaf ();
 #endif
 		
-		size_t const d = l.find (".tiff");
+		size_t const d = l.find (".png");
 		if (d != string::npos) {
 			_state.thumbs.push_back (atoi (l.substr (0, d).c_str()));
 		}
@@ -707,7 +707,7 @@ Film::thumb_subtitles (int n) const
 		} else if (k == "x") {
 			sub_x = v;
 		} else if (k == "y") {
-			subs.push_back (make_pair (Position (sub_x, v), String::compose ("%1.sub.%2.tiff", _state.thumb_base(n), sub_number)));
+			subs.push_back (make_pair (Position (sub_x, v), String::compose ("%1.sub.%2.png", _state.thumb_base(n), sub_number)));
 		}
 	}
 
diff --git a/src/lib/film_state.cc b/src/lib/film_state.cc
index 2847ea513..610362dcd 100644
--- a/src/lib/film_state.cc
+++ b/src/lib/film_state.cc
@@ -191,7 +191,7 @@ FilmState::thumb_file (int n) const
 string
 FilmState::thumb_file_for_frame (int n) const
 {
-	return thumb_base_for_frame(n) + ".tiff";
+	return thumb_base_for_frame(n) + ".png";
 }
 
 string
diff --git a/src/lib/tiff_encoder.cc b/src/lib/imagemagick_encoder.cc
index 9aa7b68c3..b7b79ed0c 100644
--- a/src/lib/tiff_encoder.cc
+++ b/src/lib/imagemagick_encoder.cc
@@ -17,8 +17,8 @@
 
 */
 
-/** @file src/tiff_encoder.h
- *  @brief An encoder that writes TIFF files (and does nothing with audio).
+/** @file src/imagemagick_encoder.cc
+ *  @brief An encoder that writes image files using ImageMagick (and does nothing with audio).
  */
 
 #include <stdexcept>
@@ -28,8 +28,8 @@
 #include <iostream>
 #include <fstream>
 #include <boost/filesystem.hpp>
-#include <tiffio.h>
-#include "tiff_encoder.h"
+#include <Magick++/Image.h>
+#include "imagemagick_encoder.h"
 #include "film.h"
 #include "film_state.h"
 #include "options.h"
@@ -44,36 +44,21 @@ using namespace boost;
  *  @param o Options.
  *  @param l Log.
  */
-TIFFEncoder::TIFFEncoder (shared_ptr<const FilmState> s, shared_ptr<const Options> o, Log* l)
+ImageMagickEncoder::ImageMagickEncoder (shared_ptr<const FilmState> s, shared_ptr<const Options> o, Log* l)
 	: Encoder (s, o, l)
 {
 	
 }
 
 void
-TIFFEncoder::process_video (shared_ptr<Image> image, int frame, shared_ptr<Subtitle> sub)
+ImageMagickEncoder::process_video (shared_ptr<Image> image, int frame, shared_ptr<Subtitle> sub)
 {
 	shared_ptr<Image> scaled = image->scale_and_convert_to_rgb (_opt->out_size, _opt->padding, _fs->scaler);
-	string tmp_file = _opt->frame_out_path (frame, true);
-	TIFF* output = TIFFOpen (tmp_file.c_str (), "w");
-	if (output == 0) {
-		throw CreateFileError (tmp_file);
-	}
-						
-	TIFFSetField (output, TIFFTAG_IMAGEWIDTH, _opt->out_size.width);
-	TIFFSetField (output, TIFFTAG_IMAGELENGTH, _opt->out_size.height);
-	TIFFSetField (output, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
-	TIFFSetField (output, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
-	TIFFSetField (output, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
-	TIFFSetField (output, TIFFTAG_BITSPERSAMPLE, 8);
-	TIFFSetField (output, TIFFTAG_SAMPLESPERPIXEL, 3);
-	
-	if (TIFFWriteEncodedStrip (output, 0, scaled->data()[0], _opt->out_size.width * _opt->out_size.height * 3) == 0) {
-		throw WriteFileError (tmp_file, 0);
-	}
-
-	TIFFClose (output);
 
+	string tmp_file = _opt->frame_out_path (frame, true);
+	Magick::Image thumb (_opt->out_size.width, _opt->out_size.height, "RGB", MagickCore::CharPixel, scaled->data()[0]);
+	thumb.magick ("PNG");
+	thumb.write (tmp_file);
 	filesystem::rename (tmp_file, _opt->frame_out_path (frame, false));
 
 	if (sub) {
@@ -87,32 +72,17 @@ TIFFEncoder::process_video (shared_ptr<Image> image, int frame, shared_ptr<Subti
 		int n = 0;
 		for (list<shared_ptr<SubtitleImage> >::iterator i = images.begin(); i != images.end(); ++i) {
 			stringstream ext;
-			ext << ".sub." << n << ".tiff";
-			
-			string tmp_sub_file = _opt->frame_out_path (frame, true, ext.str ());
-			output = TIFFOpen (tmp_sub_file.c_str(), "w");
-			if (output == 0) {
-				throw CreateFileError (tmp_file);
-			}
+			ext << ".sub." << n << ".png";
 
 			Size new_size = (*i)->image()->size ();
 			new_size.width *= x_scale;
 			new_size.height *= y_scale;
 			shared_ptr<Image> scaled = (*i)->image()->scale (new_size, _fs->scaler);
 			
-			TIFFSetField (output, TIFFTAG_IMAGEWIDTH, scaled->size().width);
-			TIFFSetField (output, TIFFTAG_IMAGELENGTH, scaled->size().height);
-			TIFFSetField (output, TIFFTAG_COMPRESSION, COMPRESSION_NONE);
-			TIFFSetField (output, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
-			TIFFSetField (output, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
-			TIFFSetField (output, TIFFTAG_BITSPERSAMPLE, 8);
-			TIFFSetField (output, TIFFTAG_SAMPLESPERPIXEL, 4);
-		
-			if (TIFFWriteEncodedStrip (output, 0, scaled->data()[0], scaled->size().width * scaled->size().height * 4) == 0) {
-				throw WriteFileError (tmp_file, 0);
-			}
-		
-			TIFFClose (output);
+			string tmp_sub_file = _opt->frame_out_path (frame, true, ext.str ());
+			Magick::Image sub_thumb (scaled->size().width, scaled->size().height, "RGBA", MagickCore::CharPixel, scaled->data()[0]);
+			sub_thumb.magick ("PNG");
+			sub_thumb.write (tmp_sub_file);
 			filesystem::rename (tmp_sub_file, _opt->frame_out_path (frame, false, ext.str ()));
 
 			metadata << "image " << n << "\n"
diff --git a/src/lib/tiff_encoder.h b/src/lib/imagemagick_encoder.h
index 1c9f33f4a..ce6ca3e8f 100644
--- a/src/lib/tiff_encoder.h
+++ b/src/lib/imagemagick_encoder.h
@@ -17,8 +17,8 @@
 
 */
 
-/** @file src/tiff_encoder.h
- *  @brief An encoder that writes TIFF files (and does nothing with audio).
+/** @file src/imagemagick_encoder.h
+ *  @brief An encoder that writes image files using ImageMagick (and does nothing with audio).
  */
 
 #include <string>
@@ -28,13 +28,13 @@
 class FilmState;
 class Log;
 
-/** @class TIFFEncoder
- *  @brief An encoder that writes TIFF files (and does nothing with audio).
+/** @class ImageMagickEncoder
+ *  @brief An encoder that writes image files using ImageMagick files (and does nothing with audio).
  */
-class TIFFEncoder : public Encoder
+class ImageMagickEncoder : public Encoder
 {
 public:
-	TIFFEncoder (boost::shared_ptr<const FilmState> s, boost::shared_ptr<const Options> o, Log* l);
+	ImageMagickEncoder (boost::shared_ptr<const FilmState> s, boost::shared_ptr<const Options> o, Log* l);
 
 	void process_begin (int64_t audio_channel_layout, AVSampleFormat audio_sample_format) {}
 	void process_video (boost::shared_ptr<Image>, int, boost::shared_ptr<Subtitle>);
diff --git a/src/lib/subtitle.cc b/src/lib/subtitle.cc
new file mode 100644
index 000000000..18dded02c
--- /dev/null
+++ b/src/lib/subtitle.cc
@@ -0,0 +1,70 @@
+/*
+    Copyright (C) 2012 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 "image.h"
+#include "exceptions.h"
+
+using namespace std;
+using namespace boost;
+
+Subtitle::Subtitle (AVSubtitle const & sub)
+{
+	/* subtitle PTS in seconds */
+	float const packet_time = (sub.pts / AV_TIME_BASE) + float (sub.pts % AV_TIME_BASE) / 1e6;
+	
+	/* hence start time for this sub */
+	_from = packet_time + (double (sub.start_display_time) / 1e3);
+	_to = packet_time + (double (sub.end_display_time) / 1e3);
+
+	for (unsigned int i = 0; i < sub.num_rects; ++i) {
+		_images.push_back (shared_ptr<SubtitleImage> (new SubtitleImage (sub.rects[i])));
+	}
+}
+
+/** @param t Time in seconds from the start of the film */
+bool
+Subtitle::displayed_at (double t)
+{
+	return t >= _from && t <= _to;
+}
+
+SubtitleImage::SubtitleImage (AVSubtitleRect const * rect)
+	: _position (rect->x, rect->y)
+	, _image (new SimpleImage (PIX_FMT_RGBA, Size (rect->w, rect->h)))
+{
+	if (rect->type != SUBTITLE_BITMAP) {
+		throw DecodeError ("non-bitmap subtitles not yet supported");
+	}
+
+	/* Start of the first line in the subtitle */
+	uint8_t* sub_p = rect->pict.data[0];
+	/* sub_p looks up into a RGB palette which is here */
+	uint32_t const * palette = (uint32_t *) rect->pict.data[1];
+	/* Start of the output data */
+	uint32_t* out_p = (uint32_t *) _image->data()[0];
+	
+	for (int y = 0; y < rect->h; ++y) {
+		uint8_t* sub_line_p = sub_p;
+		for (int x = 0; x < rect->w; ++x) {
+			*out_p++ = palette[*sub_line_p++];
+		}
+		sub_p += rect->pict.linesize[0];
+	}
+}
diff --git a/src/lib/subtitle.h b/src/lib/subtitle.h
new file mode 100644
index 000000000..18d2590eb
--- /dev/null
+++ b/src/lib/subtitle.h
@@ -0,0 +1,63 @@
+/*
+    Copyright (C) 2012 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 <list>
+#include <boost/shared_ptr.hpp>
+#include "util.h"
+
+struct AVSubtitle;
+class SubtitleImage;
+class SimpleImage;
+
+class Subtitle
+{
+public:
+	Subtitle (AVSubtitle const &);
+
+	bool displayed_at (double t);
+
+	std::list<boost::shared_ptr<SubtitleImage> > images () const {
+		return _images;
+	}
+
+private:
+	/** display from time in seconds from the start of the film */
+	double _from;
+	/** display to time in seconds from the start of the film */
+	double _to;
+	std::list<boost::shared_ptr<SubtitleImage> > _images;
+};
+
+class SubtitleImage
+{
+public:
+	SubtitleImage (AVSubtitleRect const *);
+
+	Position position () const {
+		return _position;
+	}
+	
+	boost::shared_ptr<SimpleImage> image () const {
+		return _image;
+	}
+
+private:
+	Position _position;
+	boost::shared_ptr<SimpleImage> _image;
+};
diff --git a/src/lib/thumbs_job.cc b/src/lib/thumbs_job.cc
index 779a1d5d1..16a8a7b01 100644
--- a/src/lib/thumbs_job.cc
+++ b/src/lib/thumbs_job.cc
@@ -24,7 +24,7 @@
 #include <exception>
 #include "thumbs_job.h"
 #include "film_state.h"
-#include "tiff_encoder.h"
+#include "imagemagick_encoder.h"
 #include "transcoder.h"
 #include "options.h"
 
@@ -51,7 +51,7 @@ void
 ThumbsJob::run ()
 {
 	try {
-		shared_ptr<TIFFEncoder> e (new TIFFEncoder (_fs, _opt, _log));
+		shared_ptr<ImageMagickEncoder> e (new ImageMagickEncoder (_fs, _opt, _log));
 		Transcoder w (_fs, _opt, this, _log, e);
 		w.go ();
 		set_progress (1);
diff --git a/src/lib/wscript b/src/lib/wscript
index 67292047c..9539d57a1 100644
--- a/src/lib/wscript
+++ b/src/lib/wscript
@@ -30,6 +30,7 @@ def build(bld):
 		 format.cc
                  image.cc
                  imagemagick_decoder.cc
+                 imagemagick_encoder.cc
 		 j2k_still_encoder.cc
 		 j2k_wav_encoder.cc
 		 job.cc
@@ -45,7 +46,6 @@ def build(bld):
                  subtitle.cc
 		 thumbs_job.cc
                  tiff_decoder.cc
-	         tiff_encoder.cc
                  timer.cc
 		 transcode_job.cc
 		 transcoder.cc