X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Frender_subtitles.cc;h=1984d9c670b2fd4d529d0595579071d2f42cefab;hb=083f242875671739241ad8bf7e6f436959b5d677;hp=4158b747314692396de672c254e9778c8fdc3e95;hpb=519a08e3bb2834b272f59199ae7116c242b0aa30;p=dcpomatic.git diff --git a/src/lib/render_subtitles.cc b/src/lib/render_subtitles.cc index 4158b7473..1984d9c67 100644 --- a/src/lib/render_subtitles.cc +++ b/src/lib/render_subtitles.cc @@ -1,19 +1,20 @@ /* - Copyright (C) 2014-2015 Carl Hetherington + Copyright (C) 2014-2016 Carl Hetherington - This program is free software; you can redistribute it and/or modify + 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. - This program is distributed in the hope that it will be useful, + 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 this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + along with DCP-o-matic. If not, see . */ @@ -22,9 +23,16 @@ #include "image.h" #include "cross.h" #include "font.h" +#include "dcpomatic_assert.h" +#include +#include #include #include +#ifndef DCPOMATIC_HAVE_SHOW_IN_CAIRO_CONTEXT +#include +#endif #include +#include using std::list; using std::cout; @@ -38,23 +46,65 @@ using boost::shared_ptr; using boost::optional; static FcConfig* fc_config = 0; -static list > fc_config_fonts; +static list > fc_config_fonts; + +string +marked_up (list subtitles, int target_height, float fade_factor) +{ + string out; + + BOOST_FOREACH (SubtitleString const & i, subtitles) { + out += "(i.size_in_pixels(target_height) * 72 * 1024 / 96) + "\" "; + /* Between 1-65535 inclusive, apparently... */ + out += "alpha=\"" + dcp::raw_convert(int(floor(fade_factor * 65534)) + 1) + "\" "; + out += "color=\"#" + i.colour().to_rgb_string() + "\">"; + out += i.text (); + out += ""; + } + return out; +} + +static void +set_source_rgba (Cairo::RefPtr 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_subtitle (dcp::SubtitleString const & subtitle, list > fonts, dcp::Size target) +render_line (list subtitles, list > fonts, dcp::Size target, DCPTime time) { + /* 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 (subtitle.aspect_adjust() - 1.0) > dcp::ASPECT_ADJUST_EPSILON) { - if (subtitle.aspect_adjust() < 1) { - xscale = max (0.25f, subtitle.aspect_adjust ()); + 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, subtitle.aspect_adjust ()); + yscale = 1 / min (4.0f, subtitles.front().aspect_adjust ()); } } @@ -62,16 +112,21 @@ render_subtitle (dcp::SubtitleString const & subtitle, list > f 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 = subtitle.size() * target.height / (11 * 72); + int height = largest * target.height / (11 * 72); /* ...scaled... */ height *= yscale; /* ...and add a bit more for luck */ height += target.height / 11; - shared_ptr image (new Image (PIX_FMT_RGBA, dcp::Size (target.width, height), false)); + shared_ptr image (new Image (AV_PIX_FMT_RGBA, dcp::Size (target.width, height), false)); image->make_black (); +#ifdef DCPOMATIC_HAVE_FORMAT_STRIDE_FOR_WIDTH Cairo::RefPtr surface = Cairo::ImageSurface::create ( image->data()[0], Cairo::FORMAT_ARGB32, @@ -79,6 +134,18 @@ render_subtitle (dcp::SubtitleString const & subtitle, list > f image->size().height, 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 surface = Cairo::ImageSurface::create ( + image->data()[0], + Cairo::FORMAT_ARGB32, + image->size().width, + image->size().height, + image->size().width * 4 + ); +#endif Cairo::RefPtr context = Cairo::Context::create (surface); @@ -86,22 +153,36 @@ render_subtitle (dcp::SubtitleString const & subtitle, list > f fc_config = FcConfigCreate (); } - boost::filesystem::path font_file; + FontFiles font_files; + try { - font_file = shared_path () / "LiberationSans-Regular.ttf"; + 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 location if getting the shared path failed */ - font_file = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf"; + + } + + /* 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 i, fonts) { - if (i->id() == subtitle.font() && i->file ()) { - font_file = i->file().get (); + if (i->id() == subtitles.front().font() && i->file(FontFiles::NORMAL)) { + font_files = i->files (); } } - list >::const_iterator existing = fc_config_fonts.begin (); - while (existing != fc_config_fonts.end() && existing->first != font_file) { + list >::const_iterator existing = fc_config_fonts.begin (); + while (existing != fc_config_fonts.end() && existing->first != font_files) { ++existing; } @@ -110,9 +191,18 @@ render_subtitle (dcp::SubtitleString const & subtitle, list > f font_name = existing->second; } else { /* Make this font available to DCP-o-matic */ - FcConfigAppFontAddFile (fc_config, reinterpret_cast (font_file.string().c_str ())); + for (int i = 0; i < FontFiles::VARIANTS; ++i) { + if (font_files.get(static_cast(i))) { + FcConfigAppFontAddFile ( + fc_config, + reinterpret_cast (font_files.get(static_cast(i)).get().string().c_str()) + ); + } + } - FcPattern* pattern = FcPatternBuild (0, FC_FILE, FcTypeString, font_file.string().c_str(), static_cast (0)); + FcPattern* pattern = FcPatternBuild ( + 0, FC_FILE, FcTypeString, font_files.get(FontFiles::NORMAL).get().string().c_str(), static_cast (0) + ); FcObjectSet* object_set = FcObjectSetBuild (FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, static_cast (0)); FcFontSet* font_set = FcFontList (fc_config, pattern, object_set); if (font_set) { @@ -136,7 +226,7 @@ render_subtitle (dcp::SubtitleString const & subtitle, list > f FcObjectSetDestroy (object_set); FcPatternDestroy (pattern); - fc_config_fonts.push_back (make_pair (font_file, font_name)); + fc_config_fonts.push_back (make_pair (font_files, font_name)); } FcConfigSetCurrent (fc_config); @@ -147,95 +237,130 @@ render_subtitle (dcp::SubtitleString const & subtitle, list > f context->set_line_width (1); + /* Compute fade factor */ + float fade_factor = 1; + + DCPTime const fade_in_start = DCPTime::from_seconds (subtitles.front().in().as_seconds ()); + 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 ()); + 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(); + } else 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(); + } else 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); - font.set_absolute_size (subtitle.size_in_pixels (target.height) * PANGO_SCALE); - if (subtitle.italic ()) { - font.set_style (Pango::STYLE_ITALIC); - } layout->set_font_description (font); - layout->set_text (subtitle.text ()); - - /* Compute fade factor */ - /* XXX */ - float fade_factor = 1; + layout->set_markup (marked_up (subtitles, target.height, fade_factor)); + context->scale (xscale, yscale); layout->update_from_cairo_context (context); - context->scale (xscale, yscale); + /* 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 (subtitle.effect() == dcp::SHADOW) { + if (subtitles.front().effect() == dcp::SHADOW) { /* Drop-shadow effect */ - dcp::Colour const ec = subtitle.effect_colour (); - context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor); - context->move_to (4, 4); + 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 (); } - /* The actual subtitle */ - - dcp::Colour const c = subtitle.colour (); - context->set_source_rgba (float(c.r) / 255, float(c.g) / 255, float(c.b) / 255, fade_factor); - context->move_to (0, 0); - layout->add_to_cairo_context (context); - context->fill (); - - if (subtitle.effect() == dcp::BORDER) { - /* Border effect */ - dcp::Colour ec = subtitle.effect_colour (); - context->set_source_rgba (float(ec.r) / 255, float(ec.g) / 255, float(ec.b) / 255, fade_factor); - context->move_to (0, 0); + if (subtitles.front().effect() == dcp::BORDER) { + cout << "border it " << (subtitles.front().outline_width * target.width) << " " << fade_factor << ".\n"; + /* 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_size (layout_width, layout_height); + layout->get_pixel_size (layout_width, layout_height); + layout_width *= xscale; + layout_height *= yscale; int x = 0; - switch (subtitle.h_align ()) { + switch (subtitles.front().h_align ()) { case dcp::HALIGN_LEFT: /* h_position is distance between left of frame and left of subtitle */ - x = subtitle.h_position() * target.width; + 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 + subtitle.h_position()) * target.width - layout_width / (PANGO_SCALE * 2); + 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 - subtitle.h_position()) * target.width - layout_width / PANGO_SCALE; + x = (1.0 - subtitles.front().h_position()) * target.width - layout_width; break; } int y = 0; - switch (subtitle.v_align ()) { + switch (subtitles.front().v_align ()) { case dcp::VALIGN_TOP: - /* v_position is distance between top of frame and top of subtitle */ - y = subtitle.v_position() * target.height; + /* 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 + subtitle.v_position()) * target.height - layout_height / (PANGO_SCALE * 2); + 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 - subtitle.v_position()) * target.height - layout_height / PANGO_SCALE; + y = (1.0 - subtitles.front().v_position()) * target.height - layout_height; break; } - return PositionImage (image, Position (x, y)); + return PositionImage (image, Position (max (0, x), max (0, y))); } +/** @param time Time of the frame that these subtitles are going on */ list -render_subtitles (list subtitles, list > fonts, dcp::Size target) +render_subtitles (list subtitles, list > fonts, dcp::Size target, DCPTime time) { + list pending; list images; - BOOST_FOREACH (dcp::SubtitleString const & i, subtitles) { - images.push_back (render_subtitle (i, fonts, target)); + + 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)); + pending.clear (); + } + pending.push_back (i); } + + if (!pending.empty ()) { + images.push_back (render_line (pending, fonts, target, time)); + } + return images; }