#include "subtitle_decoder.h"
#include "subtitle_content.h"
+#include "util.h"
+#include "log.h"
+#include "compose.hpp"
+#include <sub/subtitle.h>
#include <boost/shared_ptr.hpp>
#include <boost/foreach.hpp>
+#include <boost/algorithm/string.hpp>
#include <iostream>
using std::list;
using std::cout;
+using std::string;
+using std::min;
using boost::shared_ptr;
using boost::optional;
using boost::function;
SubtitleDecoder::SubtitleDecoder (
Decoder* parent,
shared_ptr<const SubtitleContent> c,
+ shared_ptr<Log> log,
function<list<ContentTimePeriod> (ContentTimePeriod, bool)> image_during,
function<list<ContentTimePeriod> (ContentTimePeriod, bool)> text_during
)
- : _parent (parent)
+ : DecoderPart (parent, log)
, _content (c)
, _image_during (image_during)
, _text_during (text_during)
void
SubtitleDecoder::give_text (ContentTimePeriod period, list<dcp::SubtitleString> 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.)
+ */
+ BOOST_FOREACH (dcp::SubtitleString& i, s) {
+ string t = i.text ();
+ boost::algorithm::replace_all (t, "<", "<");
+ boost::algorithm::replace_all (t, ">", ">");
+ i.set_text (t);
+ }
+
_decoded_text.push_back (ContentTextSubtitle (period, s));
}
-/** @param sp Full periods of subtitles that are showing or starting during the specified period */
+/** Get the subtitles that correspond to a given list of periods.
+ * @param subs Subtitles.
+ * @param sp Periods for which to extract subtitles from subs.
+ */
template <class T>
list<T>
-SubtitleDecoder::get (list<T> const & subs, list<ContentTimePeriod> const & sp, ContentTimePeriod period, bool starting, bool accurate)
+SubtitleDecoder::get (list<T> const & subs, list<ContentTimePeriod> const & sp, ContentTimePeriod period, bool accurate)
{
if (sp.empty ()) {
- /* Nothing in this period */
return list<T> ();
}
- /* Seek if what we want is before what we have, or a more than a little bit after */
- if (subs.empty() || sp.back().to < subs.front().period().from || sp.front().from > (subs.back().period().to + ContentTime::from_seconds (1))) {
- _parent->seek (sp.front().from, true);
+ /* Find the time of the first subtitle we don't have in subs */
+ optional<ContentTime> missing;
+ BOOST_FOREACH (ContentTimePeriod i, sp) {
+ typename list<T>::const_iterator j = subs.begin();
+ while (j != subs.end() && j->period() != i) {
+ ++j;
+ }
+ if (j == subs.end ()) {
+ missing = i.from;
+ }
+ }
+
+ /* Suggest to our parent decoder that it might want to seek if we haven't got what we're being asked for */
+ if (missing) {
+ _log->log (String::compose ("SD suggests seek to %1", to_string (*missing)), LogEntry::TYPE_DEBUG_DECODE);
+ maybe_seek (*missing, true);
}
/* Now enough pass() calls will either:
/* XXX: inefficient */
list<T> out;
- for (typename list<T>::const_iterator i = subs.begin(); i != subs.end(); ++i) {
- if ((starting && period.contains (i->period().from)) || (!starting && period.overlaps (i->period ()))) {
- out.push_back (*i);
+ BOOST_FOREACH (ContentTimePeriod i, sp) {
+ typename list<T>::const_iterator j = subs.begin();
+ while (j != subs.end() && j->period() != i) {
+ ++j;
+ }
+ if (j != subs.end()) {
+ out.push_back (*j);
}
}
list<ContentTextSubtitle>
SubtitleDecoder::get_text (ContentTimePeriod period, bool starting, bool accurate)
{
- return get<ContentTextSubtitle> (_decoded_text, _text_during (period, starting), period, starting, accurate);
+ return get<ContentTextSubtitle> (_decoded_text, _text_during (period, starting), period, accurate);
}
list<ContentImageSubtitle>
SubtitleDecoder::get_image (ContentTimePeriod period, bool starting, bool accurate)
{
- return get<ContentImageSubtitle> (_decoded_image, _image_during (period, starting), period, starting, accurate);
+ return get<ContentImageSubtitle> (_decoded_image, _image_during (period, starting), period, accurate);
}
void
SubtitleDecoder::seek (ContentTime, bool)
+{
+ reset ();
+}
+
+void
+SubtitleDecoder::reset ()
{
_decoded_text.clear ();
_decoded_image.clear ();
}
+
+void
+SubtitleDecoder::give_text (ContentTimePeriod period, sub::Subtitle const & subtitle)
+{
+ /* See if our next subtitle needs to be placed on screen by us */
+ bool needs_placement = false;
+ optional<int> 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<float> 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<dcp::SubtitleString> 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::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::Effect effect = dcp::NONE;
+ if (content()->outline()) {
+ effect = dcp::BORDER;
+ } else if (content()->shadow()) {
+ effect = dcp::SHADOW;
+ }
+
+ out.push_back (
+ dcp::SubtitleString (
+ string(TEXT_FONT_ID),
+ j.italic,
+ j.bold,
+ j.underline,
+ /* force the colour to whatever is configured */
+ content()->colour(),
+ j.font_size.points (72 * 11),
+ 1.0,
+ dcp::Time (period.from.seconds(), 1000),
+ dcp::Time (period.to.seconds(), 1000),
+ 0,
+ dcp::HALIGN_CENTER,
+ v_position,
+ v_align,
+ dcp::DIRECTION_LTR,
+ j.text,
+ effect,
+ content()->effect_colour(),
+ dcp::Time (content()->fade_in().seconds(), 1000),
+ dcp::Time (content()->fade_out().seconds(), 1000)
+ )
+ );
+ }
+ }
+
+ give_text (period, out);
+}
projects / dcpomatic.git / blobdiff