diff options
| author | Carl Hetherington <cth@carlh.net> | 2018-07-19 00:42:56 +0100 |
|---|---|---|
| committer | Carl Hetherington <cth@carlh.net> | 2018-07-19 23:36:56 +0100 |
| commit | d3c009991a782fa51e85828c7600994a9dd91559 (patch) | |
| tree | 8519a3138c11aeb96c8e6c7e8a749c23b7aaf468 /src/lib/render_subtitles.cc | |
| parent | af2bea29ef9975dadd26297876e2408e5e874a0c (diff) | |
More renaming.
sed -i "s/emit_text/emit_plain/g" src/lib/*.cc src/lib/*.h
sed -i "s/emit_image_start/emit_bitmap_start/g" src/lib/*.cc src/lib/*.h
sed -i "s/emit_text_start/emit_plain_start/g" src/lib/*.cc src/lib/*.h
sed -i "s/render_subtitles/render_text/g" src/lib/*.cc src/lib/*.h src/lib/wscript test/*.cc
sed -i "s/ImageStart/BitmapStart/g" src/lib/*.cc src/lib/*.h
sed -i "s/TextStart/PlainStart/g" src/lib/*.cc src/lib/*.h test/*.cc src/wx/*.cc
sed -i "s/ImageSubtitle/BitmapText/g" src/lib/*.cc src/lib/*.h
sed -i "s/text_subtitle/plain_text/g" src/lib/*.cc src/lib/*.h src/lib/wscript src/wx/*.cc src/wx/*.h test/*.cc
sed -i "s/image_subtitle/bitmap_text/g" src/lib/*.cc src/lib/*.h
mv src/lib/render_subtitles.cc src/lib/render_text.cc
mv src/lib/render_subtitles.h src/lib/render_text.h
mv src/lib/text_subtitle.cc src/lib/plain_text.cc
mv src/lib/text_subtitle.h src/lib/plain_text.h
Diffstat (limited to 'src/lib/render_subtitles.cc')
| -rw-r--r-- | src/lib/render_subtitles.cc | 386 |
1 files changed, 0 insertions, 386 deletions
diff --git a/src/lib/render_subtitles.cc b/src/lib/render_subtitles.cc deleted file mode 100644 index 35fcd8b93..000000000 --- a/src/lib/render_subtitles.cc +++ /dev/null @@ -1,386 +0,0 @@ -/* - Copyright (C) 2014-2016 Carl Hetherington <cth@carlh.net> - - 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. - - 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>. - -*/ - -#include "render_subtitles.h" -#include "types.h" -#include "image.h" -#include "cross.h" -#include "font.h" -#include "dcpomatic_assert.h" -#include <dcp/raw_convert.h> -#include <fontconfig/fontconfig.h> -#include <cairomm/cairomm.h> -#include <pangomm.h> -#ifndef DCPOMATIC_HAVE_SHOW_IN_CAIRO_CONTEXT -#include <pango/pangocairo.h> -#endif -#include <boost/foreach.hpp> -#include <boost/algorithm/string.hpp> -#include <iostream> - -using std::list; -using std::cout; -using std::string; -using std::min; -using std::max; -using std::pair; -using std::cerr; -using std::make_pair; -using boost::shared_ptr; -using boost::optional; -using boost::algorithm::replace_all; - -static FcConfig* fc_config = 0; -static list<pair<FontFiles, string> > fc_config_fonts; - -string -marked_up (list<SubtitleString> subtitles, int target_height, float fade_factor) -{ - string out; - - BOOST_FOREACH (SubtitleString const & i, subtitles) { - out += "<span "; - if (i.italic()) { - out += "style=\"italic\" "; - } - if (i.bold()) { - out += "weight=\"bold\" "; - } - if (i.underline()) { - out += "underline=\"single\" "; - } - out += "size=\"" + dcp::raw_convert<string>(i.size_in_pixels(target_height) * 72 * 1024 / 96) + "\" "; - /* Between 1-65535 inclusive, apparently... */ - out += "alpha=\"" + dcp::raw_convert<string>(int(floor(fade_factor * 65534)) + 1) + "\" "; - out += "color=\"#" + i.colour().to_rgb_string() + "\">"; - - string t = i.text(); - replace_all(t, "&", "&"); - out += t; - - out += "</span>"; - } - - return out; -} - -static void -set_source_rgba (Cairo::RefPtr<Cairo::Context> context, dcp::Colour colour, float fade_factor) -{ - context->set_source_rgba (float(colour.r) / 255, float(colour.g) / 255, float(colour.b) / 255, fade_factor); -} - -/** @param subtitles A list of subtitles that are all on the same line, - * at the same time and with the same fade in/out. - */ -static PositionImage -render_line (list<SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target, DCPTime time, int frame_rate) -{ - /* XXX: this method can only handle italic / bold changes mid-line, - nothing else yet. - */ - - DCPOMATIC_ASSERT (!subtitles.empty ()); - - /* Calculate x and y scale factors. These are only used to stretch - the font away from its normal aspect ratio. - */ - float xscale = 1; - float yscale = 1; - if (fabs (subtitles.front().aspect_adjust() - 1.0) > dcp::ASPECT_ADJUST_EPSILON) { - if (subtitles.front().aspect_adjust() < 1) { - xscale = max (0.25f, subtitles.front().aspect_adjust ()); - yscale = 1; - } else { - xscale = 1; - yscale = 1 / min (4.0f, subtitles.front().aspect_adjust ()); - } - } - - /* Make an empty bitmap as wide as target and at - least tall enough for this subtitle. - */ - - int largest = 0; - BOOST_FOREACH (dcp::SubtitleString const & i, subtitles) { - largest = max (largest, i.size()); - } - /* Basic guess on height... */ - int height = largest * target.height / (11 * 72); - /* ...scaled... */ - height *= yscale; - /* ...and add a bit more for luck */ - height += target.height / 11; - - /* FFmpeg BGRA means first byte blue, second byte green, third byte red, fourth byte alpha */ - shared_ptr<Image> image (new Image (AV_PIX_FMT_BGRA, dcp::Size (target.width, height), false)); - image->make_black (); - -#ifdef DCPOMATIC_HAVE_FORMAT_STRIDE_FOR_WIDTH - Cairo::RefPtr<Cairo::ImageSurface> surface = Cairo::ImageSurface::create ( - image->data()[0], - Cairo::FORMAT_ARGB32, - image->size().width, - image->size().height, - /* Cairo ARGB32 means first byte blue, second byte green, third byte red, fourth byte alpha */ - Cairo::ImageSurface::format_stride_for_width (Cairo::FORMAT_ARGB32, image->size().width) - ); -#else - /* Centos 5 does not have Cairo::ImageSurface::format_stride_for_width, so just use width * 4 - which I hope is safe (if slow) - */ - Cairo::RefPtr<Cairo::ImageSurface> surface = Cairo::ImageSurface::create ( - image->data()[0], - Cairo::FORMAT_ARGB32, - image->size().width, - image->size().height, - image->size().width * 4 - ); -#endif - - Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (surface); - - if (!fc_config) { - fc_config = FcConfigCreate (); - } - - FontFiles font_files; - - try { - font_files.set (FontFiles::NORMAL, shared_path () / "LiberationSans-Regular.ttf"); - font_files.set (FontFiles::ITALIC, shared_path () / "LiberationSans-Italic.ttf"); - font_files.set (FontFiles::BOLD, shared_path () / "LiberationSans-Bold.ttf"); - } catch (boost::filesystem::filesystem_error& e) { - - } - - /* Hack: try the debian/ubuntu locations if getting the shared path failed */ - - if (!font_files.get(FontFiles::NORMAL) || !boost::filesystem::exists(font_files.get(FontFiles::NORMAL).get())) { - font_files.set (FontFiles::NORMAL, "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf"); - } - if (!font_files.get(FontFiles::ITALIC) || !boost::filesystem::exists(font_files.get(FontFiles::ITALIC).get())) { - font_files.set (FontFiles::ITALIC, "/usr/share/fonts/truetype/liberation/LiberationSans-Italic.ttf"); - } - if (!font_files.get(FontFiles::BOLD) || !boost::filesystem::exists(font_files.get(FontFiles::BOLD).get())) { - font_files.set (FontFiles::BOLD, "/usr/share/fonts/truetype/liberation/LiberationSans-Bold.ttf"); - } - - BOOST_FOREACH (shared_ptr<Font> i, fonts) { - if (i->id() == subtitles.front().font() && i->file(FontFiles::NORMAL)) { - font_files = i->files (); - } - } - - list<pair<FontFiles, string> >::const_iterator existing = fc_config_fonts.begin (); - while (existing != fc_config_fonts.end() && existing->first != font_files) { - ++existing; - } - - string font_name; - if (existing != fc_config_fonts.end ()) { - font_name = existing->second; - } else { - /* Make this font available to DCP-o-matic */ - for (int i = 0; i < FontFiles::VARIANTS; ++i) { - if (font_files.get(static_cast<FontFiles::Variant>(i))) { - FcConfigAppFontAddFile ( - fc_config, - reinterpret_cast<FcChar8 const *> (font_files.get(static_cast<FontFiles::Variant>(i)).get().string().c_str()) - ); - } - } - - FcPattern* pattern = FcPatternBuild ( - 0, FC_FILE, FcTypeString, font_files.get(FontFiles::NORMAL).get().string().c_str(), static_cast<char *> (0) - ); - FcObjectSet* object_set = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, static_cast<char *> (0)); - FcFontSet* font_set = FcFontList (fc_config, pattern, object_set); - if (font_set) { - for (int i = 0; i < font_set->nfont; ++i) { - FcPattern* font = font_set->fonts[i]; - FcChar8* file; - FcChar8* family; - FcChar8* style; - if ( - FcPatternGetString (font, FC_FILE, 0, &file) == FcResultMatch && - FcPatternGetString (font, FC_FAMILY, 0, &family) == FcResultMatch && - FcPatternGetString (font, FC_STYLE, 0, &style) == FcResultMatch - ) { - font_name = reinterpret_cast<char const *> (family); - } - } - - FcFontSetDestroy (font_set); - } - - FcObjectSetDestroy (object_set); - FcPatternDestroy (pattern); - - fc_config_fonts.push_back (make_pair (font_files, font_name)); - } - - FcConfigSetCurrent (fc_config); - - Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context); - - layout->set_alignment (Pango::ALIGN_LEFT); - - context->set_line_width (1); - context->set_antialias (Cairo::ANTIALIAS_GRAY); - Cairo::FontOptions fo; - context->get_font_options (fo); - fo.set_antialias (Cairo::ANTIALIAS_GRAY); - context->set_font_options (fo); - - /* Compute fade factor */ - float fade_factor = 1; - - /* Round the fade start/end to the nearest frame start. Otherwise if a subtitle starts just after - the start of a frame it will be faded out. - */ - DCPTime const fade_in_start = DCPTime::from_seconds(subtitles.front().in().as_seconds()).round(frame_rate); - DCPTime const fade_in_end = fade_in_start + DCPTime::from_seconds (subtitles.front().fade_up_time().as_seconds ()); - DCPTime const fade_out_end = DCPTime::from_seconds (subtitles.front().out().as_seconds()).round(frame_rate); - DCPTime const fade_out_start = fade_out_end - DCPTime::from_seconds (subtitles.front().fade_down_time().as_seconds ()); - - if (fade_in_start <= time && time <= fade_in_end && fade_in_start != fade_in_end) { - fade_factor *= DCPTime(time - fade_in_start).seconds() / DCPTime(fade_in_end - fade_in_start).seconds(); - } - if (fade_out_start <= time && time <= fade_out_end && fade_out_start != fade_out_end) { - fade_factor *= 1 - DCPTime(time - fade_out_start).seconds() / DCPTime(fade_out_end - fade_out_start).seconds(); - } - if (time < fade_in_start || time > fade_out_end) { - fade_factor = 0; - } - - /* Render the subtitle at the top left-hand corner of image */ - - Pango::FontDescription font (font_name); - layout->set_font_description (font); - layout->set_markup (marked_up (subtitles, target.height, fade_factor)); - - context->scale (xscale, yscale); - layout->update_from_cairo_context (context); - - /* Shuffle the subtitle over very slightly if it has a border so that the left-hand - side of the first character's border is not cut off. - */ - int const x_offset = subtitles.front().effect() == dcp::BORDER ? (target.width / 600.0) : 0; - /* Move down a bit so that accents on capital letters can be seen */ - int const y_offset = target.height / 100.0; - - if (subtitles.front().effect() == dcp::SHADOW) { - /* Drop-shadow effect */ - set_source_rgba (context, subtitles.front().effect_colour(), fade_factor); - context->move_to (x_offset + 4, y_offset + 4); - layout->add_to_cairo_context (context); - context->fill (); - } - - if (subtitles.front().effect() == dcp::BORDER) { - /* Border effect; stroke the subtitle with a large (arbitrarily chosen) line width */ - set_source_rgba (context, subtitles.front().effect_colour(), fade_factor); - context->set_line_width (subtitles.front().outline_width * target.width / 2048.0); - context->set_line_join (Cairo::LINE_JOIN_ROUND); - context->move_to (x_offset, y_offset); - layout->add_to_cairo_context (context); - context->stroke (); - } - - /* The actual subtitle */ - - context->set_line_width (0); - context->move_to (x_offset, y_offset); -#ifdef DCPOMATIC_HAVE_SHOW_IN_CAIRO_CONTEXT - layout->show_in_cairo_context (context); -#else - pango_cairo_show_layout (context->cobj(), layout->gobj()); -#endif - - int layout_width; - int layout_height; - layout->get_pixel_size (layout_width, layout_height); - layout_width *= xscale; - layout_height *= yscale; - - int x = 0; - switch (subtitles.front().h_align ()) { - case dcp::HALIGN_LEFT: - /* h_position is distance between left of frame and left of subtitle */ - x = subtitles.front().h_position() * target.width; - break; - case dcp::HALIGN_CENTER: - /* h_position is distance between centre of frame and centre of subtitle */ - x = (0.5 + subtitles.front().h_position()) * target.width - layout_width / 2; - break; - case dcp::HALIGN_RIGHT: - /* h_position is distance between right of frame and right of subtitle */ - x = (1.0 - subtitles.front().h_position()) * target.width - layout_width; - break; - } - - int y = 0; - switch (subtitles.front().v_align ()) { - case dcp::VALIGN_TOP: - /* SMPTE says that v_position is the distance between top - of frame and top of subtitle, but this doesn't always seem to be - the case in practice; Gunnar Ásgeirsson's Dolby server appears - to put VALIGN_TOP subs with v_position as the distance between top - of frame and bottom of subtitle. - */ - y = subtitles.front().v_position() * target.height - layout_height; - break; - case dcp::VALIGN_CENTER: - /* v_position is distance between centre of frame and centre of subtitle */ - y = (0.5 + subtitles.front().v_position()) * target.height - layout_height / 2; - break; - case dcp::VALIGN_BOTTOM: - /* v_position is distance between bottom of frame and bottom of subtitle */ - y = (1.0 - subtitles.front().v_position()) * target.height - layout_height; - break; - } - - return PositionImage (image, Position<int> (max (0, x), max (0, y))); -} - -/** @param time Time of the frame that these subtitles are going on. - * @param frame_rate DCP frame rate. - */ -list<PositionImage> -render_subtitles (list<SubtitleString> subtitles, list<shared_ptr<Font> > fonts, dcp::Size target, DCPTime time, int frame_rate) -{ - list<SubtitleString> pending; - list<PositionImage> images; - - BOOST_FOREACH (SubtitleString const & i, subtitles) { - if (!pending.empty() && fabs (i.v_position() - pending.back().v_position()) > 1e-4) { - images.push_back (render_line (pending, fonts, target, time, frame_rate)); - pending.clear (); - } - pending.push_back (i); - } - - if (!pending.empty ()) { - images.push_back (render_line (pending, fonts, target, time, frame_rate)); - } - - return images; -} |
