From df17bbd25da69fc38eb2dcd8b4a2531cf0bab0bc Mon Sep 17 00:00:00 2001 From: Carl Hetherington Date: Mon, 23 Jul 2018 11:20:12 +0100 Subject: More automated renaming. ActiveCaptions -> ActiveText BitmapCaption -> BitmapText ContentCaption -> ContentText ContentTextCaption -> ContentStringText TextCaptionFileContent -> StringTextFileContent TextCaptionFileDecoder -> StringTextFileDecoder TextCaptionFile -> StringTextFile TextCaption -> StringText PlayerCaption -> PlayerText CaptionContent -> TextContent CaptionDecoder -> TextDecoder CaptionPanel -> TextPanel CaptionView -> TextView CaptionAppearanceDialog -> SubtitleAppearanceDialog CaptionType -> TextType --- src/lib/text_decoder.cc | 257 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 257 insertions(+) create mode 100644 src/lib/text_decoder.cc (limited to 'src/lib/text_decoder.cc') diff --git a/src/lib/text_decoder.cc b/src/lib/text_decoder.cc new file mode 100644 index 000000000..3b6a06ea1 --- /dev/null +++ b/src/lib/text_decoder.cc @@ -0,0 +1,257 @@ +/* + Copyright (C) 2013-2017 Carl Hetherington + + 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 . + +*/ + +#include "text_decoder.h" +#include "text_content.h" +#include "util.h" +#include "log.h" +#include "compose.hpp" +#include +#include +#include +#include +#include + +using std::list; +using std::cout; +using std::string; +using std::min; +using boost::shared_ptr; +using boost::optional; +using boost::function; + +TextDecoder::TextDecoder ( + Decoder* parent, + shared_ptr c, + shared_ptr log, + ContentTime first + ) + : DecoderPart (parent, log) + , _content (c) + , _position (first) +{ + +} + +/** Called by subclasses when an image subtitle is starting. + * @param from From time of the subtitle. + * @param image Subtitle image. + * @param rect Area expressed as a fraction of the video frame that this subtitle + * is for (e.g. a width of 0.5 means the width of the subtitle is half the width + * of the video frame) + */ +void +TextDecoder::emit_bitmap_start (ContentTime from, shared_ptr image, dcpomatic::Rect rect) +{ + BitmapStart (ContentBitmapText (from, _content->type(), image, rect)); + _position = from; +} + +void +TextDecoder::emit_plain_start (ContentTime from, list s) +{ + BOOST_FOREACH (dcp::SubtitleString& i, s) { + /* We must escape < and > in strings, otherwise they might confuse our subtitle + renderer (which uses some HTML-esque markup to do bold/italic etc.) + */ + string t = i.text (); + boost::algorithm::replace_all (t, "<", "<"); + boost::algorithm::replace_all (t, ">", ">"); + i.set_text (t); + + /* Set any forced appearance */ + if (content()->colour()) { + i.set_colour (*content()->colour()); + } + if (content()->effect_colour()) { + i.set_effect_colour (*content()->effect_colour()); + } + if (content()->effect()) { + i.set_effect (*content()->effect()); + } + if (content()->fade_in()) { + i.set_fade_up_time (dcp::Time(content()->fade_in()->seconds(), 1000)); + } + if (content()->fade_out()) { + i.set_fade_down_time (dcp::Time(content()->fade_out()->seconds(), 1000)); + } + } + + PlainStart (ContentStringText (from, _content->type(), s)); + _position = from; +} + +void +TextDecoder::emit_plain_start (ContentTime from, sub::Subtitle const & subtitle) +{ + /* See if our next subtitle needs to be vertically placed on screen by us */ + bool needs_placement = false; + optional bottom_line; + BOOST_FOREACH (sub::Line i, subtitle.lines) { + if (!i.vertical_position.reference || i.vertical_position.reference.get() == sub::TOP_OF_SUBTITLE) { + needs_placement = true; + DCPOMATIC_ASSERT (i.vertical_position.line); + if (!bottom_line || bottom_line.get() < i.vertical_position.line.get()) { + bottom_line = i.vertical_position.line.get(); + } + } + } + + /* Find the lowest proportional position */ + optional lowest_proportional; + BOOST_FOREACH (sub::Line i, subtitle.lines) { + if (i.vertical_position.proportional) { + if (!lowest_proportional) { + lowest_proportional = i.vertical_position.proportional; + } else { + lowest_proportional = min (lowest_proportional.get(), i.vertical_position.proportional.get()); + } + } + } + + list out; + BOOST_FOREACH (sub::Line i, subtitle.lines) { + BOOST_FOREACH (sub::Block j, i.blocks) { + + if (!j.font_size.specified()) { + /* Fallback default font size if no other has been specified */ + j.font_size.set_points (48); + } + + float v_position; + dcp::VAlign v_align; + if (needs_placement) { + DCPOMATIC_ASSERT (i.vertical_position.line); + /* This 1.015 is an arbitrary value to lift the bottom sub off the bottom + of the screen a bit to a pleasing degree. + */ + v_position = 1.015 - + (1 + bottom_line.get() - i.vertical_position.line.get()) + * 1.2 * content()->line_spacing() * content()->y_scale() * j.font_size.proportional (72 * 11); + + v_align = dcp::VALIGN_TOP; + } else { + DCPOMATIC_ASSERT (i.vertical_position.proportional); + DCPOMATIC_ASSERT (i.vertical_position.reference); + v_position = i.vertical_position.proportional.get(); + + if (lowest_proportional) { + /* Adjust line spacing */ + v_position = ((v_position - lowest_proportional.get()) * content()->line_spacing()) + lowest_proportional.get(); + } + + switch (i.vertical_position.reference.get()) { + case sub::TOP_OF_SCREEN: + v_align = dcp::VALIGN_TOP; + break; + case sub::VERTICAL_CENTRE_OF_SCREEN: + v_align = dcp::VALIGN_CENTER; + break; + case sub::BOTTOM_OF_SCREEN: + v_align = dcp::VALIGN_BOTTOM; + break; + default: + v_align = dcp::VALIGN_TOP; + break; + } + } + + dcp::HAlign h_align; + switch (i.horizontal_position.reference) { + case sub::LEFT_OF_SCREEN: + h_align = dcp::HALIGN_LEFT; + break; + case sub::HORIZONTAL_CENTRE_OF_SCREEN: + h_align = dcp::HALIGN_CENTER; + break; + case sub::RIGHT_OF_SCREEN: + h_align = dcp::HALIGN_RIGHT; + break; + default: + h_align = dcp::HALIGN_CENTER; + break; + } + + /* The idea here (rightly or wrongly) is that we set the appearance based on the + values in the libsub objects, and these are overridden with values from the + content by the other emit_plain_start() above. + */ + + out.push_back ( + dcp::SubtitleString ( + string(TEXT_FONT_ID), + j.italic, + j.bold, + j.underline, + j.colour.dcp(), + j.font_size.points (72 * 11), + 1.0, + dcp::Time (from.seconds(), 1000), + /* XXX: hmm; this is a bit ugly (we don't know the to time yet) */ + dcp::Time (), + i.horizontal_position.proportional, + h_align, + v_position, + v_align, + dcp::DIRECTION_LTR, + j.text, + dcp::NONE, + j.effect_colour.get_value_or(sub::Colour(0, 0, 0)).dcp(), + /* Hack: we should use subtitle.fade_up and subtitle.fade_down here + but the times of these often don't have a frame rate associated + with them so the sub::Time won't convert them to milliseconds without + throwing an exception. Since only DCP subs fill those in (and we don't + use libsub for DCP subs) we can cheat by just putting 0 in here. + */ + dcp::Time (), + dcp::Time () + ) + ); + } + } + + emit_plain_start (from, out); +} + +void +TextDecoder::emit_stop (ContentTime to) +{ + Stop (to, _content->type()); +} + +void +TextDecoder::emit_plain (ContentTimePeriod period, list s) +{ + emit_plain_start (period.from, s); + emit_stop (period.to); +} + +void +TextDecoder::emit_plain (ContentTimePeriod period, sub::Subtitle const & s) +{ + emit_plain_start (period.from, s); + emit_stop (period.to); +} + +void +TextDecoder::seek () +{ + _position = ContentTime (); +} -- cgit v1.2.3