/
subtitlescreen.cpp
2349 lines (2130 loc) · 76.8 KB
/
subtitlescreen.cpp
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#include <QFontMetrics>
#include "mythlogging.h"
#include "mythfontproperties.h"
#include "mythuisimpletext.h"
#include "mythuishape.h"
#include "mythuiimage.h"
#include "mythpainter.h"
#include "subtitlescreen.h"
#define LOC QString("Subtitles: ")
#define LOC_WARN QString("Subtitles Warning: ")
// Class SubtitleFormat manages fonts and backgrounds for subtitles.
//
// Formatting is specified by the theme in the new file
// osd_subtitle.xml, in the osd_subtitle window. Subtitle types are
// text, teletext, 608, 708_0, 708_1, ..., 708_7. Each subtitle type
// has a fontdef component for the text and a shape component for the
// background. By default, the attributes of a subtitle type come
// from either the provider (e.g. font color, italics) or the system
// default (e.g. font family). These attributes can be overridden by
// the xml file.
//
// The fontdef name and the background shape name are both simply the
// name of the subtitle type. The fontdef and shape should ultimately
// inherit from the special value "provider", otherwise all provider
// values will be ignored.
//
// The following example forces .srt subtitles to be rendered in
// yellow text, FreeSans font, black shadow, with a translucent black
// background. The fontdef and shape names are "text" since the
// subtitles come from a .srt file. Note that in this example, color
// formatting controls in the .srt file will be ignored due to the
// explicit setting of yellow text.
//
// <?xml version="1.0" encoding="utf-8"?>
// <!DOCTYPE mythuitheme SYSTEM "http://www.mythtv.org/schema/mythuitheme.dtd">
// <mythuitheme>
// <window name="osd_subtitle">
// <fontdef name="text" face="FreeSans" from="provider">
// <color>#FFFF00</color>
// <shadowoffset>2,2</shadowoffset>
// <shadowcolor>#000000</shadowcolor>
// </fontdef>
// <shape name="text" from="provider">
// <fill color="#000000" alpha="100" />
// </shape>
// </window>
// </mythuitheme>
//
// All elements/attributes of fontdef and shape can be used. Note
// however that area and position are explicitly ignored, as these are
// dictated by the subtitle layout.
//
// This is implemented with almost no MythUI changes. Two copies of a
// "provider" object are created, with default/representative provider
// attributes. One copy is then "complemented" to have a different
// value for each attribute that a provider might change. The
// osd_subtitle.xml file is loaded twice, once with respect to each
// provider object, and the desired fontdef or shape is looked up.
// The two fontdefs or shapes are compared attribute by attribute, and
// each attribute that is different is an attribute that the provider
// may modify, whereas each identical attribute represents one that is
// fixed by the theme.
class SubtitleFormat
{
public:
SubtitleFormat(void) {}
~SubtitleFormat(void);
MythFontProperties *GetFont(const QString &family,
const CC708CharacterAttribute &attr,
int pixelSize, bool isTeletext,
int zoom, int stretch);
MythUIShape *GetBackground(MythUIType *parent, const QString &name,
const QString &family,
const CC708CharacterAttribute &attr);
static QString MakePrefix(const QString &family,
const CC708CharacterAttribute &attr);
bool IsUnlocked(const QString &prefix, const QString &property) const
{
return m_changeMap[prefix].contains(property);
}
private:
void Load(const QString &family,
const CC708CharacterAttribute &attr);
static void CreateProviderDefault(const QString &family,
const CC708CharacterAttribute &attr,
MythUIType *parent,
bool isComplement,
MythFontProperties **font,
MythUIShape **bg);
static void Complement(MythFontProperties *font, MythUIShape *bg);
static QSet<QString> Diff(const QString &family,
const CC708CharacterAttribute &attr,
MythFontProperties *font1,
MythFontProperties *font2,
MythUIShape *bg1,
MythUIShape *bg2);
QHash<QString, MythFontProperties *> m_fontMap;
QHash<QString, MythUIShape *> m_shapeMap;
QHash<QString, QSet<QString> > m_changeMap;
QHash<QString, int> m_pixelSizeMap;
QVector<MythUIType *> m_cleanup;
};
static const QString kSubProvider("provider");
static const QString kSubFileName ("osd_subtitle.xml");
static const QString kSubWindowName("osd_subtitle");
static const QString kSubFamily608 ("608");
static const QString kSubFamily708 ("708");
static const QString kSubFamilyText ("text");
static const QString kSubFamilyAV ("AV");
static const QString kSubFamilyTeletext("teletext");
static const QString kSubAttrItalics ("italics");
static const QString kSubAttrBold ("bold");
static const QString kSubAttrUnderline("underline");
static const QString kSubAttrPixelsize("pixelsize");
static const QString kSubAttrColor ("color");
static const QString kSubAttrBGfill ("bgfill");
static const QString kSubAttrShadow ("shadow");
static const QString kSubAttrShadowoffset("shadowoffset");
static const QString kSubAttrShadowcolor ("shadowcolor");
static const QString kSubAttrShadowalpha ("shadowalpha");
static const QString kSubAttrOutline ("outline");
static const QString kSubAttrOutlinecolor("outlinecolor");
static const QString kSubAttrOutlinesize ("outlinesize");
static const QString kSubAttrOutlinealpha("outlinealpha");
static QString srtColorString(QColor color);
static QString fontToString(MythFontProperties *f)
{
QString result;
result = QString("face=%1 pixelsize=%2 color=%3 "
"italics=%4 weight=%5 underline=%6")
.arg(f->GetFace()->family())
.arg(f->GetFace()->pixelSize())
.arg(srtColorString(f->color()))
.arg(f->GetFace()->italic())
.arg(f->GetFace()->weight())
.arg(f->GetFace()->underline());
QPoint offset;
QColor color;
int alpha;
int size;
f->GetShadow(offset, color, alpha);
result += QString(" shadow=%1 shadowoffset=%2 "
"shadowcolor=%3 shadowalpha=%4")
.arg(f->hasShadow())
.arg(QString("(%1,%2)").arg(offset.x()).arg(offset.y()))
.arg(srtColorString(color))
.arg(alpha);
f->GetOutline(color, size, alpha);
result += QString(" outline=%1 outlinecolor=%2 "
"outlinesize=%3 outlinealpha=%4")
.arg(f->hasOutline())
.arg(srtColorString(color))
.arg(size)
.arg(alpha);
return result;
}
SubtitleFormat::~SubtitleFormat(void)
{
for (int i = 0; i < m_cleanup.size(); ++i)
{
m_cleanup[i]->DeleteAllChildren();
m_cleanup[i]->deleteLater();
m_cleanup[i] = NULL; // just to be safe
}
}
QString SubtitleFormat::MakePrefix(const QString &family,
const CC708CharacterAttribute &attr)
{
if (family == kSubFamily708)
return family + "_" + QString::number(attr.font_tag & 0x7);
else
return family;
}
void SubtitleFormat::CreateProviderDefault(const QString &family,
const CC708CharacterAttribute &attr,
MythUIType *parent,
bool isComplement,
MythFontProperties **returnFont,
MythUIShape **returnBg)
{
MythFontProperties *font = new MythFontProperties();
MythUIShape *bg = new MythUIShape(parent, kSubProvider);
if (family == kSubFamily608)
{
font->GetFace()->setFamily("FreeMono");
bg->SetFillBrush(QBrush(Qt::black));
}
else if (family == kSubFamily708)
{
static const char *cc708Fonts[] = {
"FreeMono", // default
"FreeMono", // mono serif
"Droid Serif", // prop serif
"Droid Sans Mono", // mono sans
"Droid Sans", // prop sans
"Purisa", // casual
"TeX Gyre Chorus", // cursive
"Droid Serif" // small caps, QFont::SmallCaps will be applied
};
font->GetFace()->setFamily(cc708Fonts[attr.font_tag & 0x7]);
}
else if (family == kSubFamilyText)
{
font->GetFace()->setFamily("Droid Sans");
bg->SetFillBrush(QBrush(Qt::black));
}
else if (family == kSubFamilyTeletext)
{
font->GetFace()->setFamily("FreeMono");
}
font->GetFace()->setPixelSize(10);
if (isComplement)
Complement(font, bg);
parent->AddFont(kSubProvider, font);
*returnFont = font;
*returnBg = bg;
}
static QColor differentColor(const QColor &color)
{
return color == Qt::white ? Qt::black : Qt::white;
}
// Change everything (with respect to the == operator) that the
// provider might define or override.
void SubtitleFormat::Complement(MythFontProperties *font, MythUIShape *bg)
{
QPoint offset;
QColor color;
int alpha;
int size;
QFont *face = font->GetFace();
face->setItalic(!face->italic());
face->setPixelSize(face->pixelSize() + 1);
face->setUnderline(!face->underline());
face->setWeight((face->weight() + 1) % 32);
font->SetColor(differentColor(font->color()));
font->GetShadow(offset, color, alpha);
offset.setX(offset.x() + 1);
font->SetShadow(!font->hasShadow(), offset, differentColor(color),
255 - alpha);
font->GetOutline(color, size, alpha);
font->SetOutline(!font->hasOutline(), differentColor(color),
size + 1, 255 - alpha);
bg->SetFillBrush(bg->m_fillBrush == Qt::NoBrush ?
Qt::SolidPattern : Qt::NoBrush);
}
void SubtitleFormat::Load(const QString &family,
const CC708CharacterAttribute &attr)
{
// Widgets for the actual values
MythUIType *baseParent = new MythUIType(NULL, "base");
m_cleanup += baseParent;
MythFontProperties *providerBaseFont;
MythUIShape *providerBaseShape;
CreateProviderDefault(family, attr, baseParent, false,
&providerBaseFont, &providerBaseShape);
// Widgets for the "negative" values
MythUIType *negParent = new MythUIType(NULL, "base");
m_cleanup += negParent;
MythFontProperties *negFont;
MythUIShape *negBG;
CreateProviderDefault(family, attr, negParent, true, &negFont, &negBG);
bool posResult =
XMLParseBase::LoadWindowFromXML(kSubFileName, kSubWindowName,
baseParent);
bool negResult =
XMLParseBase::LoadWindowFromXML(kSubFileName, kSubWindowName,
negParent);
if (!posResult || !negResult)
LOG(VB_VBI, LOG_INFO,
QString("Couldn't load theme file %1").arg(kSubFileName));
QString prefix = MakePrefix(family, attr);
MythFontProperties *resultFont = baseParent->GetFont(prefix);
if (!resultFont)
resultFont = providerBaseFont;
MythUIShape *resultBG =
dynamic_cast<MythUIShape *>(baseParent->GetChild(prefix));
if (!resultBG)
resultBG = providerBaseShape;
MythFontProperties *testFont = negParent->GetFont(prefix);
if (!testFont)
testFont = negFont;
MythUIShape *testBG =
dynamic_cast<MythUIShape *>(negParent->GetChild(prefix));
if (!testBG)
testBG = negBG;
if (family == kSubFamily708 &&
(attr.font_tag & 0x7) == k708AttrFontSmallCaps)
resultFont->GetFace()->setCapitalization(QFont::SmallCaps);
m_fontMap[prefix] = resultFont;
m_shapeMap[prefix] = resultBG;
LOG(VB_VBI, LOG_DEBUG,
QString("providerBaseFont = %1").arg(fontToString(providerBaseFont)));
LOG(VB_VBI, LOG_DEBUG,
QString("negFont = %1").arg(fontToString(negFont)));
LOG(VB_VBI, LOG_DEBUG,
QString("resultFont = %1").arg(fontToString(resultFont)));
LOG(VB_VBI, LOG_DEBUG,
QString("testFont = %1").arg(fontToString(testFont)));
m_changeMap[prefix] = Diff(family, attr, resultFont, testFont,
resultBG, testBG);
if (!IsUnlocked(prefix, kSubAttrPixelsize))
m_pixelSizeMap[prefix] = resultFont->GetFace()->pixelSize();
delete negFont;
}
QSet<QString> SubtitleFormat::Diff(const QString &family,
const CC708CharacterAttribute &attr,
MythFontProperties *font1,
MythFontProperties *font2,
MythUIShape *bg1,
MythUIShape *bg2)
{
bool is708 = (family == kSubFamily708);
QSet<QString> result;
QFont *face1 = font1->GetFace();
QFont *face2 = font2->GetFace();
if (face1->italic() != face2->italic())
result << kSubAttrItalics;
if (face1->weight() != face2->weight())
result << kSubAttrBold;
if (face1->underline() != face2->underline())
result << kSubAttrUnderline;
if (face1->pixelSize() != face2->pixelSize())
result << kSubAttrPixelsize;
if (font1->color() != font2->color())
result << kSubAttrColor;
if (is708 && font1->hasShadow() != font2->hasShadow())
{
result << kSubAttrShadow;
QPoint offset1, offset2;
QColor color1, color2;
int alpha1, alpha2;
font1->GetShadow(offset1, color1, alpha1);
font2->GetShadow(offset2, color2, alpha2);
if (offset1 != offset2)
result << kSubAttrShadowoffset;
if (color1 != color2)
result << kSubAttrShadowcolor;
if (alpha1 != alpha2)
result << kSubAttrShadowalpha;
}
if (is708 && font1->hasOutline() != font2->hasOutline())
{
result << kSubAttrOutline;
QColor color1, color2;
int size1, size2;
int alpha1, alpha2;
font1->GetOutline(color1, size1, alpha1);
font2->GetOutline(color2, size2, alpha2);
if (color1 != color2)
result << kSubAttrOutlinecolor;
if (size1 != size2)
result << kSubAttrOutlinesize;
if (alpha1 != alpha2)
result << kSubAttrOutlinealpha;
}
if (bg1->m_fillBrush != bg2->m_fillBrush)
result << kSubAttrBGfill;
QString values = "";
QSet<QString>::const_iterator i = result.constBegin();
for (; i != result.constEnd(); ++i)
values += " " + (*i);
LOG(VB_VBI, LOG_INFO,
QString("Subtitle family %1 allows provider to change:%2")
.arg(MakePrefix(family, attr)).arg(values));
return result;
}
MythFontProperties *
SubtitleFormat::GetFont(const QString &family,
const CC708CharacterAttribute &attr,
int pixelSize, bool isTeletext,
int zoom, int stretch)
{
int origPixelSize = pixelSize;
float scale = zoom / 100.0;
if (isTeletext)
scale = scale * 17 / 25;
if ((attr.pen_size & 0x3) == k708AttrSizeSmall)
scale = scale * 32 / 42;
else if ((attr.pen_size & 0x3) == k708AttrSizeLarge)
scale = scale * 42 / 32;
QString prefix = MakePrefix(family, attr);
if (!m_fontMap.contains(prefix))
Load(family, attr);
MythFontProperties *result = m_fontMap[prefix];
// Apply the scaling factor to pixelSize even if the theme
// explicitly sets pixelSize.
if (!IsUnlocked(prefix, kSubAttrPixelsize))
pixelSize = m_pixelSizeMap[prefix];
pixelSize *= scale;
result->GetFace()->setPixelSize(pixelSize);
result->GetFace()->setStretch(stretch);
if (IsUnlocked(prefix, kSubAttrItalics))
result->GetFace()->setItalic(attr.italics);
if (IsUnlocked(prefix, kSubAttrUnderline))
result->GetFace()->setUnderline(attr.underline);
if (IsUnlocked(prefix, kSubAttrBold))
result->GetFace()->setBold(attr.boldface);
if (IsUnlocked(prefix, kSubAttrColor))
result->SetColor(attr.GetFGColor());
if (IsUnlocked(prefix, kSubAttrShadow))
{
QPoint offset;
QColor color;
int alpha;
bool shadow = result->hasShadow();
result->GetShadow(offset, color, alpha);
if (IsUnlocked(prefix, kSubAttrShadowcolor))
color = attr.GetEdgeColor();
if (IsUnlocked(prefix, kSubAttrShadowalpha))
alpha = attr.GetFGAlpha();
if (IsUnlocked(prefix, kSubAttrShadowoffset))
{
int off = pixelSize / 20;
offset = QPoint(off, off);
if (attr.edge_type == k708AttrEdgeLeftDropShadow)
{
shadow = true;
offset.setX(-off);
}
else if (attr.edge_type == k708AttrEdgeRightDropShadow)
shadow = true;
else
shadow = false;
}
result->SetShadow(shadow, offset, color, alpha);
}
if (IsUnlocked(prefix, kSubAttrOutline))
{
QColor color;
int off;
int alpha;
bool outline = result->hasOutline();
result->GetOutline(color, off, alpha);
if (IsUnlocked(prefix, kSubAttrOutlinecolor))
color = attr.GetEdgeColor();
if (IsUnlocked(prefix, kSubAttrOutlinealpha))
alpha = attr.GetFGAlpha();
if (IsUnlocked(prefix, kSubAttrOutlinesize))
{
if (attr.edge_type == k708AttrEdgeUniform ||
attr.edge_type == k708AttrEdgeRaised ||
attr.edge_type == k708AttrEdgeDepressed)
{
outline = true;
off = pixelSize / 20;
}
else
outline = false;
}
result->SetOutline(outline, color, off, alpha);
}
LOG(VB_VBI, LOG_DEBUG,
QString("GetFont(family=%1, prefix=%2, orig pixelSize=%3, "
"new pixelSize=%4 zoom=%5) = %6")
.arg(family).arg(prefix).arg(origPixelSize).arg(pixelSize)
.arg(zoom).arg(fontToString(result)));
return result;
}
MythUIShape *
SubtitleFormat::GetBackground(MythUIType *parent, const QString &name,
const QString &family,
const CC708CharacterAttribute &attr)
{
QString prefix = MakePrefix(family, attr);
if (!m_shapeMap.contains(prefix))
Load(family, attr);
MythUIShape *result = new MythUIShape(parent, name);
result->CopyFrom(m_shapeMap[prefix]);
if (family == kSubFamily708)
{
if (IsUnlocked(prefix, kSubAttrBGfill))
{
result->SetFillBrush(QBrush(attr.GetBGColor()));
}
}
else if (family == kSubFamilyTeletext)
{
// add code here when teletextscreen.cpp is refactored
}
LOG(VB_VBI, LOG_DEBUG,
QString("GetBackground(prefix=%1) = "
"{type=%2 alpha=%3 brushstyle=%4 brushcolor=%5}")
.arg(prefix).arg(result->m_type).arg(result->GetAlpha())
.arg(result->m_fillBrush.style())
.arg(srtColorString(result->m_fillBrush.color())));
return result;
}
////////////////////////////////////////////////////////////////////////////
static const float PAD_WIDTH = 0.5;
static const float PAD_HEIGHT = 0.04;
// Normal font height is designed to be 1/20 of safe area height, with
// extra blank space between lines to make 17 lines within the safe
// area.
static const float LINE_SPACING = (20.0 / 17.0);
SubtitleScreen::SubtitleScreen(MythPlayer *player, const char * name,
int fontStretch) :
MythScreenType((MythScreenType*)NULL, name),
m_player(player), m_subreader(NULL), m_608reader(NULL),
m_708reader(NULL), m_safeArea(QRect()),
m_removeHTML(QRegExp("</?.+>")), m_subtitleType(kDisplayNone),
m_textFontZoom(100), m_textFontZoomPrev(100), m_refreshArea(false),
m_fontStretch(fontStretch),
m_format(new SubtitleFormat)
{
m_removeHTML.setMinimal(true);
#ifdef USING_LIBASS
m_assLibrary = NULL;
m_assRenderer = NULL;
m_assTrackNum = -1;
m_assTrack = NULL;
m_assFontCount = 0;
#endif
}
SubtitleScreen::~SubtitleScreen(void)
{
ClearAllSubtitles();
delete m_format;
#ifdef USING_LIBASS
CleanupAssLibrary();
#endif
}
void SubtitleScreen::EnableSubtitles(int type, bool forced_only)
{
if (forced_only)
{
SetVisible(true);
SetArea(MythRect());
return;
}
m_subtitleType = type;
if (m_subreader)
{
m_subreader->EnableAVSubtitles(kDisplayAVSubtitle == m_subtitleType);
m_subreader->EnableTextSubtitles(kDisplayTextSubtitle == m_subtitleType);
m_subreader->EnableRawTextSubtitles(kDisplayRawTextSubtitle == m_subtitleType);
}
if (m_608reader)
m_608reader->SetEnabled(kDisplayCC608 == m_subtitleType);
if (m_708reader)
m_708reader->SetEnabled(kDisplayCC708 == m_subtitleType);
ClearAllSubtitles();
SetVisible(m_subtitleType != kDisplayNone);
SetArea(MythRect());
m_textFontZoom = gCoreContext->GetNumSetting("OSDCC708TextZoom", 100);
switch (m_subtitleType)
{
case kDisplayTextSubtitle:
case kDisplayRawTextSubtitle:
m_family = kSubFamilyText;
break;
case kDisplayCC608:
m_family = kSubFamily608;
break;
case kDisplayCC708:
m_family = kSubFamily708;
break;
case kDisplayAVSubtitle:
m_family = kSubFamilyAV;
m_textFontZoom = gCoreContext->GetNumSetting("OSDAVSubZoom", 100);
break;
}
m_textFontZoomPrev = m_textFontZoom;
}
void SubtitleScreen::DisableForcedSubtitles(void)
{
if (kDisplayNone != m_subtitleType)
return;
ClearAllSubtitles();
SetVisible(false);
SetArea(MythRect());
}
bool SubtitleScreen::Create(void)
{
if (!m_player)
return false;
m_subreader = m_player->GetSubReader();
m_608reader = m_player->GetCC608Reader();
m_708reader = m_player->GetCC708Reader();
if (!m_subreader)
LOG(VB_GENERAL, LOG_WARNING, LOC + "Failed to get subtitle reader.");
if (!m_608reader)
LOG(VB_GENERAL, LOG_WARNING, LOC + "Failed to get CEA-608 reader.");
if (!m_708reader)
LOG(VB_GENERAL, LOG_WARNING, LOC + "Failed to get CEA-708 reader.");
return true;
}
void SubtitleScreen::Pulse(void)
{
ExpireSubtitles();
DisplayAVSubtitles(); // allow forced subtitles to work
if (kDisplayTextSubtitle == m_subtitleType)
DisplayTextSubtitles();
else if (kDisplayCC608 == m_subtitleType)
DisplayCC608Subtitles();
else if (kDisplayCC708 == m_subtitleType)
DisplayCC708Subtitles();
else if (kDisplayRawTextSubtitle == m_subtitleType)
DisplayRawTextSubtitles();
OptimiseDisplayedArea();
MythScreenType::Pulse();
m_refreshArea = false;
m_textFontZoomPrev = m_textFontZoom;
}
void SubtitleScreen::ClearAllSubtitles(void)
{
ClearNonDisplayedSubtitles();
ClearDisplayedSubtitles();
#ifdef USING_LIBASS
if (m_assTrack)
ass_flush_events(m_assTrack);
#endif
}
void SubtitleScreen::ClearNonDisplayedSubtitles(void)
{
if (m_subreader && (kDisplayAVSubtitle == m_subtitleType))
m_subreader->ClearAVSubtitles();
if (m_subreader && (kDisplayRawTextSubtitle == m_subtitleType))
m_subreader->ClearRawTextSubtitles();
if (m_608reader && (kDisplayCC608 == m_subtitleType))
m_608reader->ClearBuffers(true, true);
if (m_708reader && (kDisplayCC708 == m_subtitleType))
m_708reader->ClearBuffers();
}
void SubtitleScreen::ClearDisplayedSubtitles(void)
{
for (int i = 0; i < 8; i++)
Clear708Cache(i);
DeleteAllChildren();
m_expireTimes.clear();
m_avsubCache.clear();
SetRedraw();
}
void SubtitleScreen::ExpireSubtitles(void)
{
VideoOutput *videoOut = m_player->GetVideoOutput();
VideoFrame *currentFrame = videoOut ? videoOut->GetLastShownFrame() : NULL;
long long now = currentFrame ? currentFrame->timecode : LLONG_MAX;
QMutableHashIterator<MythUIType*, long long> it(m_expireTimes);
while (it.hasNext())
{
it.next();
if (it.value() < now)
{
m_avsubCache.remove(it.key());
DeleteChild(it.key());
it.remove();
SetRedraw();
}
}
}
void SubtitleScreen::OptimiseDisplayedArea(void)
{
if (!m_refreshArea)
return;
QRegion visible;
QListIterator<MythUIType *> i(m_ChildrenList);
while (i.hasNext())
{
MythUIType *img = i.next();
visible = visible.united(img->GetArea());
}
if (visible.isEmpty())
return;
QRect bounding = visible.boundingRect();
bounding = bounding.translated(m_safeArea.topLeft());
bounding = m_safeArea.intersected(bounding);
int left = m_safeArea.left() - bounding.left();
int top = m_safeArea.top() - bounding.top();
SetArea(MythRect(bounding));
i.toFront();
while (i.hasNext())
{
MythUIType *img = i.next();
img->SetArea(img->GetArea().translated(left, top));
}
}
void SubtitleScreen::DisplayAVSubtitles(void)
{
if (!m_player || !m_subreader)
return;
// Resize subtitles if the zoom factor has changed since the last
// update.
if (m_textFontZoom != m_textFontZoomPrev)
{
double factor = m_textFontZoom / (double)m_textFontZoomPrev;
QHash<MythUIType*, MythImage*>::iterator it;
for (it = m_avsubCache.begin(); it != m_avsubCache.end(); ++it)
{
MythUIImage *image = dynamic_cast<MythUIImage *>(it.key());
if (image)
{
QSize size = it.value()->size();
size *= factor;
it.value()->Resize(size);
}
}
m_refreshArea = true;
}
AVSubtitles* subs = m_subreader->GetAVSubtitles();
QMutexLocker lock(&(subs->lock));
if (subs->buffers.empty() && (kDisplayAVSubtitle != m_subtitleType))
return;
VideoOutput *videoOut = m_player->GetVideoOutput();
VideoFrame *currentFrame = videoOut ? videoOut->GetLastShownFrame() : NULL;
if (!currentFrame || !videoOut)
return;
float tmp = 0.0;
QRect dummy;
videoOut->GetOSDBounds(dummy, m_safeArea, tmp, tmp, tmp);
while (!subs->buffers.empty())
{
const AVSubtitle subtitle = subs->buffers.front();
if (subtitle.start_display_time > currentFrame->timecode)
break;
long long displayfor = subtitle.end_display_time -
subtitle.start_display_time;
if (displayfor == 0)
displayfor = 60000;
displayfor = (displayfor < 50) ? 50 : displayfor;
long long late = currentFrame->timecode -
subtitle.start_display_time;
ClearDisplayedSubtitles();
subs->buffers.pop_front();
for (std::size_t i = 0; i < subtitle.num_rects; ++i)
{
AVSubtitleRect* rect = subtitle.rects[i];
bool displaysub = true;
if (subs->buffers.size() > 0 &&
subs->buffers.front().end_display_time <
currentFrame->timecode)
{
displaysub = false;
}
if (displaysub && rect->type == SUBTITLE_BITMAP)
{
QRect display(rect->display_x, rect->display_y,
rect->display_w, rect->display_h);
// XSUB and some DVD/DVB subs are based on the original video
// size before the video was converted. We need to guess the
// original size and allow for the difference
int right = rect->x + rect->w;
int bottom = rect->y + rect->h;
if (subs->fixPosition || (currentFrame->height < bottom) ||
(currentFrame->width < right) ||
!display.width() || !display.height())
{
int sd_height = 576;
if ((m_player->GetFrameRate() > 26.0f ||
m_player->GetFrameRate() < 24.0f) && bottom <= 480)
sd_height = 480;
int height = ((currentFrame->height <= sd_height) &&
(bottom <= sd_height)) ? sd_height :
((currentFrame->height <= 720) && bottom <= 720)
? 720 : 1080;
int width = ((currentFrame->width <= 720) &&
(right <= 720)) ? 720 :
((currentFrame->width <= 1280) &&
(right <= 1280)) ? 1280 : 1920;
display = QRect(0, 0, width, height);
}
// split into upper/lower to allow zooming
QRect bbox;
int uh = display.height() / 2 - rect->y;
int lh;
long long displayuntil = currentFrame->timecode + displayfor;
if (uh > 0)
{
bbox = QRect(0, 0, rect->w, uh);
uh = DisplayScaledAVSubtitles(rect, bbox, true, display,
subtitle.forced,
QString("avsub%1t").arg(i),
displayuntil, late);
}
else
uh = 0;
lh = rect->h - uh;
if (lh > 0)
{
bbox = QRect(0, uh, rect->w, lh);
lh = DisplayScaledAVSubtitles(rect, bbox, false, display,
subtitle.forced,
QString("avsub%1b").arg(i),
displayuntil, late);
}
}
#ifdef USING_LIBASS
else if (displaysub && rect->type == SUBTITLE_ASS)
{
InitialiseAssTrack(m_player->GetDecoder()->GetTrack(kTrackTypeSubtitle));
AddAssEvent(rect->ass);
}
#endif
}
m_subreader->FreeAVSubtitle(subtitle);
}
#ifdef USING_LIBASS
RenderAssTrack(currentFrame->timecode);
#endif
}
int SubtitleScreen::DisplayScaledAVSubtitles(const AVSubtitleRect *rect,
QRect &bbox, bool top,
QRect &display, int forced,
QString imagename,
long long displayuntil,
long long late)
{
// split image vertically if it spans middle of display
// - split point is empty line nearest the middle
// crop image to reduce scaling time
int xmin, xmax, ymin, ymax;
int ylast, ysplit;
bool prev_empty = false;
// initialize to opposite edges
xmin = bbox.right();
xmax = bbox.left();
ymin = bbox.bottom();
ymax = bbox.top();
ylast = bbox.top();
ysplit = bbox.bottom();
// find bounds of active image
for (int y = bbox.top(); y <= bbox.bottom(); ++y)
{
if (y >= rect->h)
{
// end of image
if (!prev_empty)
ylast = y;
break;
}
bool empty = true;
for (int x = bbox.left(); x <= bbox.right(); ++x)
{
const uint8_t color =
rect->pict.data[0][y * rect->pict.linesize[0] + x];
const uint32_t pixel = *((uint32_t *)rect->pict.data[1] + color);
if (pixel & 0xff000000)
{
empty = false;
if (x < xmin)
xmin = x;
if (x > xmax)
xmax = x;
}
}
if (!empty)
{
if (y < ymin)
ymin = y;
if (y > ymax)
ymax = y;
}
else if (!prev_empty)
{
// remember uppermost empty line
ylast = y;
}
prev_empty = empty;
}
if (ymax <= ymin)
return 0;
if (top)
{
if (ylast < ymin)
// no empty lines
return 0;
if (ymax == bbox.bottom())
{
ymax = ylast;
ysplit = ylast;
}
}
// set new bounds
bbox.setLeft(xmin);
bbox.setRight(xmax);
bbox.setTop(ymin);
bbox.setBottom(ymax);
// copy active region
// AVSubtitleRect's image data's not guaranteed to be 4 byte
// aligned.
QRect orig_rect(bbox.left(), bbox.top(), bbox.width(), bbox.height());
QImage qImage(bbox.width(), bbox.height(), QImage::Format_ARGB32);
for (int y = 0; y < bbox.height(); ++y)
{
int ysrc = y + bbox.top();
for (int x = 0; x < bbox.width(); ++x)
{
int xsrc = x + bbox.left();
const uint8_t color =
rect->pict.data[0][ysrc * rect->pict.linesize[0] + xsrc];
const uint32_t pixel = *((uint32_t *)rect->pict.data[1] + color);
qImage.setPixel(x, y, pixel);
}
}
// translate to absolute coordinates
bbox.translate(rect->x, rect->y);
// scale and move according to zoom factor
bbox.setWidth(bbox.width() * m_textFontZoom / 100);
bbox.setHeight(bbox.height() * m_textFontZoom / 100);
VideoOutput *videoOut = m_player->GetVideoOutput();
QRect scaled = videoOut->GetImageRect(bbox, &display);
if (scaled.size() != orig_rect.size())
qImage = qImage.scaled(scaled.width(), scaled.height(),
Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
int hsize = m_safeArea.width();
int vsize = m_safeArea.height();
scaled.moveLeft(((100 - m_textFontZoom) * hsize / 2 +
m_textFontZoom * scaled.left()) /
100);
if (top)
// anchor up
scaled.moveTop(scaled.top() * m_textFontZoom / 100);
else
// anchor down
scaled.moveTop(((100 - m_textFontZoom) * vsize +