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Code Issues Releases Wiki Activity

Fixed scaling subtitles with anti-aliasing

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This commit is contained in:
Klaus Schmidinger 2021-03-17 15:24:34 +01:00
parent 3d55d3045e
commit f672fe90c1
3 changed files with 75 additions and 36 deletions
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1
CONTRIBUTORS
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@ -1228,6 +1228,7 @@ Peter Bieringer <pb@bieringer.de>
external commands
for making the functions cRecordingInfo::SetData() and cRecordingInfo::SetAux() public
for adding some missing user command calls for copying, renaming and moving recordings
for fixing scaling subtitles with anti-aliasing
Alexander Damhuis <ad@phonedation.de>
for reporting problems when deleting a timer that is currently recording

1
HISTORY
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@ -9616,3 +9616,4 @@ Video Disk Recorder Revision History
"TITLE - EPISODE" and "TITLE: EPISODE" the same.
- Decreased the scrambling timeout for CAMs known to decrypt a certain channel, so
that it won't collide with MAXBROKENTIMEOUT in recorder.c.
- Fixed scaling subtitles with anti-aliasing (thanks to Peter Bieringer).

109
dvbsubtitle.c
View File

@ -7,7 +7,7 @@
* Original author: Marco Schluessler <marco@lordzodiac.de>
* With some input from the "subtitles plugin" by Pekka Virtanen <pekka.virtanen@sci.fi>
*
* $Id: dvbsubtitle.c 4.2 2020/05/15 12:32:51 kls Exp $
* $Id: dvbsubtitle.c 5.1 2021/03/17 15:24:34 kls Exp $
*/
#include "dvbsubtitle.h"
@ -993,7 +993,9 @@ public:
int64_t Pts(void) const { return pts; }
bool Pending(void) { return pending; }
cSubtitleObjects *Objects(void) { return &objects; }
tArea *GetAreas(int &NumAreas, double FactorX, double FactorY);
tArea *GetAreas(int &NumAreas);
tArea CombineAreas(int NumAreas, const tArea *Areas);
tArea ScaleArea(const tArea &Area, double FactorX, double FactorY);
cSubtitleObject *GetObjectById(int ObjectId, bool New = false);
cSubtitleClut *GetClutById(int ClutId, bool New = false);
cSubtitleRegion *GetRegionById(int RegionId, bool New = false);
@ -1077,7 +1079,7 @@ void cDvbSubtitlePage::ParsePgs(int64_t Pts, cBitStream &bs)
pending = true;
}
tArea *cDvbSubtitlePage::GetAreas(int &NumAreas, double FactorX, double FactorY)
tArea *cDvbSubtitlePage::GetAreas(int &NumAreas)
{
if (regions.Count() > 0) {
NumAreas = regionRefs.Count();
@ -1085,13 +1087,11 @@ tArea *cDvbSubtitlePage::GetAreas(int &NumAreas, double FactorX, double FactorY)
tArea *a = Areas;
for (cSubtitleRegionRef *srr = regionRefs.First(); srr; srr = regionRefs.Next(srr)) {
if (cSubtitleRegion *sr = GetRegionById(srr->RegionId())) {
a->x1 = int(round(FactorX * srr->RegionHorizontalAddress()));
a->y1 = int(round(FactorY * srr->RegionVerticalAddress()));
a->x2 = int(round(FactorX * (srr->RegionHorizontalAddress() + sr->RegionWidth() - 1)));
a->y2 = int(round(FactorY * (srr->RegionVerticalAddress() + sr->RegionHeight() - 1)));
a->x1 = srr->RegionHorizontalAddress();
a->y1 = srr->RegionVerticalAddress();
a->x2 = srr->RegionHorizontalAddress() + sr->RegionWidth() - 1;
a->y2 = srr->RegionVerticalAddress() + sr->RegionHeight() - 1;
a->bpp = sr->RegionDepth();
while ((a->Width() & 3) != 0)
a->x2++; // aligns width to a multiple of 4, so 2, 4 and 8 bpp will work
}
else
a->x1 = a->y1 = a->x2 = a->y2 = a->bpp = 0;
@ -1103,6 +1103,37 @@ tArea *cDvbSubtitlePage::GetAreas(int &NumAreas, double FactorX, double FactorY)
return NULL;
}
tArea cDvbSubtitlePage::CombineAreas(int NumAreas, const tArea *Areas)
{
tArea a;
a.x1 = INT_MAX;
a.x2 = INT_MIN;
a.y1 = INT_MAX;
a.y2 = INT_MIN;
a.bpp = 1;
for (int i = 0; i < NumAreas; i++) {
a.x1 = min(a.x1, Areas[i].x1);
a.x2 = max(a.x2, Areas[i].x2);
a.y1 = min(a.y1, Areas[i].y1);
a.y2 = max(a.y2, Areas[i].y2);
a.bpp = max(a.bpp, Areas[i].bpp);
}
return a;
}
tArea cDvbSubtitlePage::ScaleArea(const tArea &Area, double FactorX, double FactorY)
{
tArea a;
a.x1 = int(round(FactorX * Area.x1) );
a.x2 = int(round(FactorX * Area.x2) - 1);
a.y1 = int(round(FactorY * Area.y1) );
a.y2 = int(round(FactorY * Area.y2) - 1);
a.bpp = Area.bpp;
while ((a.Width() & 3) != 0)
a.x2++; // aligns width to a multiple of 4, so 2, 4 and 8 bpp will work
return a;
}
cSubtitleClut *cDvbSubtitlePage::GetClutById(int ClutId, bool New)
{
for (cSubtitleClut *sc = cluts.First(); sc; sc = cluts.Next(sc)) {
@ -1219,11 +1250,13 @@ private:
int timeout;
tArea *areas;
int numAreas;
tArea areaCombined;
tArea areaOsd;
double osdFactorX;
double osdFactorY;
cVector<cBitmap *> bitmaps;
public:
cDvbSubtitleBitmaps(int State, int64_t Pts, int Timeout, tArea *Areas, int NumAreas, double OsdFactorX, double OsdFactorY);
cDvbSubtitleBitmaps(int State, int64_t Pts, int Timeout, tArea *Areas, int NumAreas, double OsdFactorX, double OsdFactorY, tArea &AreaCombined, tArea &AreaOsd);
~cDvbSubtitleBitmaps();
int State(void) { return state; }
int64_t Pts(void) { return pts; }
@ -1234,13 +1267,15 @@ public:
void DbgDump(int WindowWidth, int WindowHeight);
};
cDvbSubtitleBitmaps::cDvbSubtitleBitmaps(int State, int64_t Pts, int Timeout, tArea *Areas, int NumAreas, double OsdFactorX, double OsdFactorY)
cDvbSubtitleBitmaps::cDvbSubtitleBitmaps(int State, int64_t Pts, int Timeout, tArea *Areas, int NumAreas, double OsdFactorX, double OsdFactorY, tArea &AreaCombined, tArea &AreaOsd)
{
state = State;
pts = Pts;
timeout = Timeout;
areas = Areas;
numAreas = NumAreas;
areaCombined = AreaCombined;
areaOsd = AreaOsd;
osdFactorX = OsdFactorX;
osdFactorY = OsdFactorY;
}
@ -1260,25 +1295,25 @@ void cDvbSubtitleBitmaps::AddBitmap(cBitmap *Bitmap)
void cDvbSubtitleBitmaps::Draw(cOsd *Osd)
{
bool Scale = !(DoubleEqual(osdFactorX, 1.0) && DoubleEqual(osdFactorY, 1.0));
bool AntiAlias = true;
bool AntiAlias = Setup.AntiAlias;
if (Scale && osdFactorX > 1.0 || osdFactorY > 1.0) {
// Upscaling requires 8bpp:
int Bpp[MAXOSDAREAS];
for (int i = 0; i < numAreas; i++) {
Bpp[i] = areas[i].bpp;
areas[i].bpp = 8;
}
if (Osd->CanHandleAreas(areas, numAreas) != oeOk) {
for (int i = 0; i < numAreas; i++)
areas[i].bpp = Bpp[i];
int Bpp = areaOsd.bpp;
areaOsd.bpp = 8;
if (Osd->CanHandleAreas(&areaOsd, 1) != oeOk) {
areaOsd.bpp = Bpp;
AntiAlias = false;
}
}
if (State() == 0 || Osd->SetAreas(areas, numAreas) == oeOk) {
if (State() == 0 || Osd->SetAreas(&areaOsd, 1) == oeOk) {
cBitmap combined(areaCombined.Width(), areaCombined.Height(), areaCombined.bpp);
combined.SetOffset(areaCombined.x1, areaCombined.y1);
for (int i = 0; i < bitmaps.Size(); i++) {
// merge bitmaps into combined
cBitmap *b = bitmaps[i];
Osd->DrawScaledBitmap(int(round(b->X0() * osdFactorX)), int(round(b->Y0() * osdFactorY)), *b, osdFactorX, osdFactorY, AntiAlias);
combined.DrawBitmap(b->X0(), b->Y0(), *b);
}
Osd->DrawScaledBitmap(int(round(combined.X0() * osdFactorX)), int(round(combined.Y0() * osdFactorY)), combined, osdFactorX, osdFactorY, AntiAlias);
Osd->Flush();
}
}
@ -1734,25 +1769,27 @@ void cDvbSubtitleConverter::FinishPage(cDvbSubtitlePage *Page)
if (!AssertOsd())
return;
int NumAreas;
tArea *Areas = Page->GetAreas(NumAreas, osdFactorX, osdFactorY);
tArea *Areas = Page->GetAreas(NumAreas);
tArea AreaCombined = Page->CombineAreas(NumAreas, Areas);
tArea AreaOsd = Page->ScaleArea(AreaCombined, osdFactorX, osdFactorY);
int Bpp = 8;
bool Reduced = false;
while (osd && osd->CanHandleAreas(Areas, NumAreas) != oeOk) {
dbgoutput("CanHandleAreas: %d<br>\n", osd->CanHandleAreas(Areas, NumAreas));
int HalfBpp = Bpp / 2;
if (HalfBpp >= 2) {
for (int i = 0; i < NumAreas; i++) {
if (Areas[i].bpp >= Bpp) {
Areas[i].bpp = HalfBpp;
if (osd && NumAreas > 0) {
while (osd->CanHandleAreas(&AreaOsd, 1) != oeOk) {
dbgoutput("CanHandleAreas: %d<br>\n", osd->CanHandleAreas(&AreaOsd, 1));
int HalfBpp = Bpp / 2;
if (HalfBpp >= 2) {
if (AreaOsd.bpp >= Bpp) {
AreaOsd.bpp = HalfBpp;
Reduced = true;
}
}
Bpp = HalfBpp;
Bpp = HalfBpp;
}
else
return; // unable to draw bitmaps
}
else
return; // unable to draw bitmaps
}
cDvbSubtitleBitmaps *Bitmaps = new cDvbSubtitleBitmaps(Page->PageState(), Page->Pts(), Page->PageTimeout(), Areas, NumAreas, osdFactorX, osdFactorY);
}
cDvbSubtitleBitmaps *Bitmaps = new cDvbSubtitleBitmaps(Page->PageState(), Page->Pts(), Page->PageTimeout(), Areas, NumAreas, osdFactorX, osdFactorY, AreaCombined, AreaOsd);
bitmaps->Add(Bitmaps);
for (int i = 0; i < NumAreas; i++) {
if (cSubtitleRegionRef *srr = Page->GetRegionRefByIndex(i)) {