void SubtitleScreen::DisplayTextSubtitles(void)
{
if (!InitialiseFont(m_fontStretch) || !m_player || !m_subreader)
return;
bool changed = false;
VideoOutput *vo = m_player->GetVideoOutput();
if (vo)
{
QRect oldsafe = m_safeArea;
m_safeArea = m_player->GetVideoOutput()->GetSafeRect();
if (oldsafe != m_safeArea)
{
changed = true;
int height = (m_safeArea.height() * m_textFontZoom) / 2000;
gTextSubFont->GetFace()->setPixelSize(height);
gTextSubFont->GetFace()->setItalic(false);
gTextSubFont->GetFace()->setUnderline(false);
gTextSubFont->SetColor(Qt::white);
}
}
else
{
return;
}
VideoFrame *currentFrame = vo->GetLastShownFrame();
if (!currentFrame)
return;
TextSubtitles *subs = m_subreader->GetTextSubtitles();
subs->Lock();
uint64_t playPos = 0;
if (subs->IsFrameBasedTiming())
{
// frame based subtitles get out of synch after running mythcommflag
// for the file, i.e., the following number is wrong and does not
// match the subtitle frame numbers:
playPos = currentFrame->frameNumber;
}
else
{
// Use timecodes for time based SRT subtitles. Feeding this into
// NormalizeVideoTimecode() should adjust for non-zero start times
// and wraps. For MPEG, wraps will occur just once every 26.5 hours
// and other formats less frequently so this should be sufficient.
// Note: timecodes should now always be valid even in the case
// when a frame doesn't have a valid timestamp. If an exception is
// found where this is not true then we need to use the frameNumber
// when timecode is not defined by uncommenting the following lines.
//if (currentFrame->timecode == 0)
// playPos = (uint64_t)
// ((currentFrame->frameNumber / video_frame_rate) * 1000);
//else
playPos = m_player->GetDecoder()->NormalizeVideoTimecode(currentFrame->timecode);
}
if (playPos != 0)
changed |= subs->HasSubtitleChanged(playPos);
if (!changed)
{
subs->Unlock();
return;
}
DeleteAllChildren();
SetRedraw();
if (playPos == 0)
{
subs->Unlock();
return;
}
QStringList rawsubs = subs->GetSubtitles(playPos);
if (rawsubs.empty())
{
subs->Unlock();
return;
}
OptimiseTextSubs(rawsubs);
subs->Unlock();
DrawTextSubtitles(rawsubs, 0, 0);
}