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vdr/dvbsubtitle.c

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/*
* dvbsubtitle.c: DVB subtitles
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* Original author: Marco Schlüßler <marco@lordzodiac.de>
* With some input from the "subtitle plugin" by Pekka Virtanen <pekka.virtanen@sci.fi>
*
* $Id: dvbsubtitle.c 1.2 2007/11/03 14:36:07 kls Exp $
*/
#include "dvbsubtitle.h"
#include "device.h"
#define PAGE_COMPOSITION_SEGMENT 0x10
#define REGION_COMPOSITION_SEGMENT 0x11
#define CLUT_DEFINITION_SEGMENT 0x12
#define OBJECT_DATA_SEGMENT 0x13
#define END_OF_DISPLAY_SET_SEGMENT 0x80
// Set these to 'true' for debug output:
static bool DebugConverter = false;
static bool DebugSegments = false;
static bool DebugPages = false;
static bool DebugRegions = false;
static bool DebugObjects = false;
static bool DebugCluts = false;
#define dbgconverter(a...) if (DebugConverter) fprintf(stderr, a)
#define dbgsegments(a...) if (DebugSegments) fprintf(stderr, a)
#define dbgpages(a...) if (DebugPages) fprintf(stderr, a)
#define dbgregions(a...) if (DebugRegions) fprintf(stderr, a)
#define dbgobjects(a...) if (DebugObjects) fprintf(stderr, a)
#define dbgcluts(a...) if (DebugCluts) fprintf(stderr, a)
// --- cSubtitleClut ---------------------------------------------------------
class cSubtitleClut : public cListObject {
private:
int clutId;
int version;
cPalette palette2;
cPalette palette4;
cPalette palette8;
public:
cSubtitleClut(int ClutId);
int ClutId(void) { return clutId; }
int Version(void) { return version; }
void SetVersion(int Version) { version = Version; }
void SetColor(int Bpp, int Index, tColor Color);
const cPalette *GetPalette(int Bpp);
};
cSubtitleClut::cSubtitleClut(int ClutId)
:palette2(2)
,palette4(4)
,palette8(8)
{
clutId = ClutId;
version = -1;
}
void cSubtitleClut::SetColor(int Bpp, int Index, tColor Color)
{
switch (Bpp) {
case 2: palette2.SetColor(Index, Color); break;
case 4: palette4.SetColor(Index, Color); break;
case 8: palette8.SetColor(Index, Color); break;
default: esyslog("ERROR: wrong Bpp in cSubtitleClut::SetColor(%d, %d, %08X)", Bpp, Index, Color);
}
}
const cPalette *cSubtitleClut::GetPalette(int Bpp)
{
switch (Bpp) {
case 2: return &palette2;
case 4: return &palette4;
case 8: return &palette8;
default: esyslog("ERROR: wrong Bpp in cSubtitleClut::GetPalette(%d)", Bpp);
}
return &palette8;
}
// --- cSubtitleObject -------------------------------------------------------
class cSubtitleObject : public cListObject {
private:
int objectId;
int version;
int codingMethod;
bool nonModifyingColorFlag;
int nibblePos;
uchar backgroundColor;
uchar foregroundColor;
int providerFlag;
int px;
int py;
cBitmap *bitmap;
void DrawLine(int x, int y, tIndex Index, int Length);
uchar Get2Bits(const uchar *Data, int &Index);
uchar Get4Bits(const uchar *Data, int &Index);
bool Decode2BppCodeString(const uchar *Data, int &Index, int&x, int y);
bool Decode4BppCodeString(const uchar *Data, int &Index, int&x, int y);
bool Decode8BppCodeString(const uchar *Data, int &Index, int&y, int y);
public:
cSubtitleObject(int ObjectId, cBitmap *Bitmap);
int ObjectId(void) { return objectId; }
int Version(void) { return version; }
int CodingMethod(void) { return codingMethod; }
bool NonModifyingColorFlag(void) { return nonModifyingColorFlag; }
void DecodeSubBlock(const uchar *Data, int Length, bool Even);
void SetVersion(int Version) { version = Version; }
void SetBackgroundColor(uchar BackgroundColor) { backgroundColor = BackgroundColor; }
void SetForegroundColor(uchar ForegroundColor) { foregroundColor = ForegroundColor; }
void SetNonModifyingColorFlag(bool NonModifyingColorFlag) { nonModifyingColorFlag = NonModifyingColorFlag; }
void SetCodingMethod(int CodingMethod) { codingMethod = CodingMethod; }
void SetPosition(int x, int y) { px = x; py = y; }
void SetProviderFlag(int ProviderFlag) { providerFlag = ProviderFlag; }
};
cSubtitleObject::cSubtitleObject(int ObjectId, cBitmap *Bitmap)
{
objectId = ObjectId;
version = -1;
codingMethod = -1;
nonModifyingColorFlag = false;
nibblePos = 0;
backgroundColor = 0;
foregroundColor = 0;
providerFlag = -1;
px = py = 0;
bitmap = Bitmap;
}
void cSubtitleObject::DecodeSubBlock(const uchar *Data, int Length, bool Even)
{
int x = 0;
int y = Even ? 0 : 1;
for (int index = 0; index < Length; ) {
switch (Data[index++]) {
case 0x10: {
nibblePos = 8;
while (Decode2BppCodeString(Data, index, x, y) && index < Length)
;
if (!nibblePos)
index++;
break;
}
case 0x11: {
nibblePos = 4;
while (Decode4BppCodeString(Data, index, x, y) && index < Length)
;
if (!nibblePos)
index++;
break;
}
case 0x12:
while (Decode8BppCodeString(Data, index, x, y) && index < Length)
;
break;
case 0x20: //TODO
dbgobjects("sub block 2 to 4 map");
index += 4;
break;
case 0x21: //TODO
dbgobjects("sub block 2 to 8 map");
index += 4;
break;
case 0x22: //TODO
dbgobjects("sub block 4 to 8 map");
index += 16;
break;
case 0xF0:
x = 0;
y += 2;
break;
}
}
}
void cSubtitleObject::DrawLine(int x, int y, tIndex Index, int Length)
{
if (nonModifyingColorFlag && Index == 1)
return;
x += px;
y += py;
for (int pos = x; pos < x + Length; pos++)
bitmap->SetIndex(pos, y, Index);
}
uchar cSubtitleObject::Get2Bits(const uchar *Data, int &Index)
{
uchar result = Data[Index];
if (!nibblePos) {
Index++;
nibblePos = 8;
}
nibblePos -= 2;
return (result >> nibblePos) & 0x03;
}
uchar cSubtitleObject::Get4Bits(const uchar *Data, int &Index)
{
uchar result = Data[Index];
if (!nibblePos) {
Index++;
nibblePos = 4;
}
else {
result >>= 4;
nibblePos -= 4;
}
return result & 0x0F;
}
bool cSubtitleObject::Decode2BppCodeString(const uchar *Data, int &Index, int &x, int y)
{
int rl = 0;
int color = 0;
uchar code = Get2Bits(Data, Index);
if (code) {
color = code;
rl = 1;
}
else {
code = Get2Bits(Data, Index);
if (code & 2) { // switch_1
rl = ((code & 1) << 2) + Get2Bits(Data, Index) + 3;
color = Get2Bits(Data, Index);
}
else if (code & 1)
rl = 1; //color 0
else {
code = Get2Bits(Data, Index);
switch (code & 0x3) { //switch_3
case 0:
return false;
case 1:
rl = 2; //color 0
break;
case 2:
rl = (Get2Bits(Data, Index) << 2) + Get2Bits(Data, Index) + 12;
color = Get2Bits(Data, Index);
break;
case 3:
rl = (Get2Bits(Data, Index) << 6) + (Get2Bits(Data, Index) << 4) + (Get2Bits(Data, Index) << 2) + Get2Bits(Data, Index) + 29;
color = Get2Bits(Data, Index);
break;
}
}
}
DrawLine(x, y, color, rl);
x += rl;
return true;
}
bool cSubtitleObject::Decode4BppCodeString(const uchar *Data, int &Index, int &x, int y)
{
int rl = 0;
int color = 0;
uchar code = Get4Bits(Data, Index);
if (code) {
color = code;
rl = 1;
}
else {
code = Get4Bits(Data, Index);
if (code & 8) { // switch_1
if (code & 4) { //switch_2
switch (code & 3) { //switch_3
case 0: // color 0
rl = 1;
break;
case 1: // color 0
rl = 2;
break;
case 2:
rl = Get4Bits(Data, Index) + 9;
color = Get4Bits(Data, Index);
break;
case 3:
rl = (Get4Bits(Data, Index) << 4) + Get4Bits(Data, Index) + 25;
color = Get4Bits(Data, Index);
break;
}
}
else {
rl = (code & 3) + 4;
color = Get4Bits(Data, Index);
}
}
else { // color 0
if (!code)
return false;
rl = code + 2;
}
}
DrawLine(x, y, color, rl);
x += rl;
return true;
}
bool cSubtitleObject::Decode8BppCodeString(const uchar *Data, int &Index, int &x, int y)
{
int rl = 0;
int color = 0;
uchar code = Data[Index++];
if (code) {
color = code;
rl = 1;
}
else {
code = Data[Index++];
rl = code & 0x63;
if (code & 0x80)
color = Data[Index++];
else if (!rl)
return false; //else color 0
}
DrawLine(x, y, color, rl);
x += rl;
return true;
}
// --- cSubtitleRegion -------------------------------------------------------
class cSubtitleRegion : public cListObject, public cBitmap {
private:
int regionId;
int version;
int clutId;
int horizontalAddress;
int verticalAddress;
int level;
cList<cSubtitleObject> objects;
public:
cSubtitleRegion(int RegionId);
int RegionId(void) { return regionId; }
int Version(void) { return version; }
int ClutId(void) { return clutId; }
int Level(void) { return level; }
int Depth(void) { return Bpp(); }
void FillRegion(tIndex Index);
cSubtitleObject *GetObjectById(int ObjectId, bool New = false);
int HorizontalAddress(void) { return horizontalAddress; }
int VerticalAddress(void) { return verticalAddress; }
void SetVersion(int Version) { version = Version; }
void SetClutId(int ClutId) { clutId = ClutId; }
void SetLevel(int Level);
void SetDepth(int Depth);
void SetHorizontalAddress(int HorizontalAddress) { horizontalAddress = HorizontalAddress; }
void SetVerticalAddress(int VerticalAddress) { verticalAddress = VerticalAddress; }
};
cSubtitleRegion::cSubtitleRegion(int RegionId)
:cBitmap(1, 1, 4)
{
regionId = RegionId;
version = -1;
clutId = -1;
horizontalAddress = 0;
verticalAddress = 0;
level = 0;
}
void cSubtitleRegion::FillRegion(tIndex Index)
{
dbgregions("FillRegion %d\n", Index);
for (int y = 0; y < Height(); y++) {
for (int x = 0; x < Width(); x++)
SetIndex(x, y, Index);
}
}
cSubtitleObject *cSubtitleRegion::GetObjectById(int ObjectId, bool New)
{
cSubtitleObject *result = NULL;
for (cSubtitleObject *so = objects.First(); so; so = objects.Next(so)) {
if (so->ObjectId() == ObjectId)
result = so;
}
if (!result && New) {
result = new cSubtitleObject(ObjectId, this);
objects.Add(result);
}
return result;
}
void cSubtitleRegion::SetLevel(int Level)
{
if (Level > 0 && Level < 4)
level = 1 << Level;
}
void cSubtitleRegion::SetDepth(int Depth)
{
if (Depth > 0 && Depth < 4)
SetBpp(1 << Depth);
}
// --- cDvbSubtitlePage ------------------------------------------------------
class cDvbSubtitlePage : public cListObject {
private:
int pageId;
int version;
int state;
int64_t pts;
int timeout;
cList<cSubtitleClut> cluts;
public:
cList<cSubtitleRegion> regions;
cDvbSubtitlePage(int PageId);
virtual ~cDvbSubtitlePage();
int PageId(void) { return pageId; }
int Version(void) { return version; }
int State(void) { return state; }
tArea *GetAreas(void);
cSubtitleClut *GetClutById(int ClutId, bool New = false);
cSubtitleObject *GetObjectById(int ObjectId);
cSubtitleRegion *GetRegionById(int RegionId, bool New = false);
int64_t Pts(void) const { return pts; }
int Timeout(void) { return timeout; }
void SetVersion(int Version) { version = Version; }
void SetPts(int64_t Pts) { pts = Pts; }
void SetState(int State);
void SetTimeout(int Timeout) { timeout = Timeout; }
void UpdateRegionPalette(cSubtitleClut *Clut);
};
cDvbSubtitlePage::cDvbSubtitlePage(int PageId)
{
pageId = PageId;
version = -1;
state = -1;
pts = 0;
timeout = 0;
}
cDvbSubtitlePage::~cDvbSubtitlePage()
{
}
tArea *cDvbSubtitlePage::GetAreas(void)
{
if (regions.Count() > 0) {
tArea *Areas = new tArea[regions.Count()];
tArea *a = Areas;
for (cSubtitleRegion *sr = regions.First(); sr; sr = regions.Next(sr)) {
a->x1 = sr->HorizontalAddress();
a->y1 = sr->VerticalAddress();
a->x2 = sr->HorizontalAddress() + sr->Width() - 1;
a->y2 = sr->VerticalAddress() + sr->Height() - 1;
a->bpp = sr->Bpp();
while ((a->Width() & 3) != 0)
a->x2++; // aligns width to a multiple of 4, so 2, 4 and 8 bpp will work
a++;
}
return Areas;
}
return NULL;
}
cSubtitleClut *cDvbSubtitlePage::GetClutById(int ClutId, bool New)
{
cSubtitleClut *result = NULL;
for (cSubtitleClut *sc = cluts.First(); sc; sc = cluts.Next(sc)) {
if (sc->ClutId() == ClutId)
result = sc;
}
if (!result && New) {
result = new cSubtitleClut(ClutId);
cluts.Add(result);
}
return result;
}
cSubtitleRegion *cDvbSubtitlePage::GetRegionById(int RegionId, bool New)
{
cSubtitleRegion *result = NULL;
for (cSubtitleRegion *sr = regions.First(); sr; sr = regions.Next(sr)) {
if (sr->RegionId() == RegionId)
result = sr;
}
if (!result && New) {
result = new cSubtitleRegion(RegionId);
regions.Add(result);
}
return result;
}
cSubtitleObject *cDvbSubtitlePage::GetObjectById(int ObjectId)
{
cSubtitleObject *result = NULL;
for (cSubtitleRegion *sr = regions.First(); sr && !result; sr = regions.Next(sr))
result = sr->GetObjectById(ObjectId);
return result;
}
void cDvbSubtitlePage::SetState(int State)
{
state = State;
switch (state) {
case 0: // normal case - page update
dbgpages("page update\n");
break;
case 1: // aquisition point - page refresh
dbgpages("page refresh\n");
regions.Clear();
break;
case 2: // mode change - new page
dbgpages("new Page\n");
regions.Clear();
cluts.Clear();
break;
case 3: // reserved
break;
}
}
void cDvbSubtitlePage::UpdateRegionPalette(cSubtitleClut *Clut)
{
for (cSubtitleRegion *sr = regions.First(); sr; sr = regions.Next(sr)) {
if (sr->ClutId() == Clut->ClutId())
sr->Replace(*Clut->GetPalette(sr->Bpp()));
}
}
// --- cDvbSubtitleAssembler -------------------------------------------------
class cDvbSubtitleAssembler {
private:
uchar *data;
int length;
int pos;
int size;
bool Realloc(int Size);
public:
cDvbSubtitleAssembler(void);
virtual ~cDvbSubtitleAssembler();
void Reset(void);
unsigned char *Get(int &Length);
void Put(const uchar *Data, int Length);
};
cDvbSubtitleAssembler::cDvbSubtitleAssembler(void)
{
data = NULL;
size = 0;
Reset();
}
cDvbSubtitleAssembler::~cDvbSubtitleAssembler()
{
free(data);
}
void cDvbSubtitleAssembler::Reset(void)
{
length = 0;
pos = 0;
}
bool cDvbSubtitleAssembler::Realloc(int Size)
{
if (Size > size) {
size = max(Size, 2048);
data = (uchar *)realloc(data, size);
if (!data) {
esyslog("ERROR: can't allocate memory for subtitle assembler");
length = 0;
size = 0;
return false;
}
}
return true;
}
unsigned char *cDvbSubtitleAssembler::Get(int &Length)
{
if (length > pos + 5) {
Length = (data[pos + 4] << 8) + data[pos + 5] + 6;
if (length >= pos + Length) {
unsigned char *result = data + pos;
pos += Length;
return result;
}
}
return NULL;
}
void cDvbSubtitleAssembler::Put(const uchar *Data, int Length)
{
if (Length && Realloc(length + Length)) {
memcpy(data + length, Data, Length);
length += Length;
}
}
// --- cDvbSubtitleBitmaps ---------------------------------------------------
class cDvbSubtitleBitmaps : public cListObject {
private:
int64_t pts;
int timeout;
tArea *areas;
int numAreas;
cVector<cBitmap *> bitmaps;
public:
cDvbSubtitleBitmaps(int64_t Pts, int Timeout, tArea *Areas, int NumAreas);
~cDvbSubtitleBitmaps();
int64_t Pts(void) { return pts; }
int Timeout(void) { return timeout; }
void AddBitmap(cBitmap *Bitmap);
void Draw(cOsd *Osd);
};
cDvbSubtitleBitmaps::cDvbSubtitleBitmaps(int64_t Pts, int Timeout, tArea *Areas, int NumAreas)
{
pts = Pts;
timeout = Timeout;
areas = Areas;
numAreas = NumAreas;
}
cDvbSubtitleBitmaps::~cDvbSubtitleBitmaps()
{
delete[] areas;
for (int i = 0; i < bitmaps.Size(); i++)
delete bitmaps[i];
}
void cDvbSubtitleBitmaps::AddBitmap(cBitmap *Bitmap)
{
bitmaps.Append(Bitmap);
}
void cDvbSubtitleBitmaps::Draw(cOsd *Osd)
{
if (Osd->SetAreas(areas, numAreas) == oeOk) {
for (int i = 0; i < bitmaps.Size(); i++)
Osd->DrawBitmap(bitmaps[i]->X0(), bitmaps[i]->Y0(), *bitmaps[i]);
Osd->Flush();
}
}
// --- cDvbSubtitleConverter -------------------------------------------------
int cDvbSubtitleConverter::setupLevel = 0;
cDvbSubtitleConverter::cDvbSubtitleConverter(void)
:cThread("subtitleConverter")
{
dvbSubtitleAssembler = new cDvbSubtitleAssembler;
osd = NULL;
pages = new cList<cDvbSubtitlePage>;
bitmaps = new cList<cDvbSubtitleBitmaps>;
Start();
}
cDvbSubtitleConverter::~cDvbSubtitleConverter()
{
Cancel(3);
delete dvbSubtitleAssembler;
delete osd;
delete bitmaps;
delete pages;
}
void cDvbSubtitleConverter::SetupChanged(void)
{
setupLevel++;
}
void cDvbSubtitleConverter::Reset(void)
{
dbgconverter("Converter reset -----------------------\n");
dvbSubtitleAssembler->Reset();
Lock();
pages->Clear();
bitmaps->Clear();
DELETENULL(osd);
Unlock();
}
int cDvbSubtitleConverter::Convert(const uchar *Data, int Length)
{
if (Data && Length > 8) {
int PayloadOffset = Data[8] + 9;
int SubstreamHeaderLength = 4;
bool ResetSubtitleAssembler = Data[PayloadOffset + 3] == 0x00;
// Compatibility mode for old subtitles plugin:
if ((Data[7] & 0x01) && (Data[PayloadOffset - 3] & 0x81) == 0x01 && Data[PayloadOffset - 2] == 0x81) {
PayloadOffset--;
SubstreamHeaderLength = 1;
ResetSubtitleAssembler = Data[8] >= 5;
}
if (Length > PayloadOffset + SubstreamHeaderLength) {
int64_t pts = 0;
if ((Data[7] & 0x80) && Data[8] >= 5) {
pts = (((int64_t)Data[ 9]) & 0x0E) << 29;
pts |= ( (int64_t)Data[10]) << 22;
pts |= (((int64_t)Data[11]) & 0xFE) << 14;
pts |= ( (int64_t)Data[12]) << 7;
pts |= (((int64_t)Data[13]) & 0xFE) >> 1;
dbgconverter("Converter PTS: %lld\n", pts);
}
const uchar *data = Data + PayloadOffset + SubstreamHeaderLength; // skip substream header
int length = Length - PayloadOffset - SubstreamHeaderLength; // skip substream header
if (ResetSubtitleAssembler)
dvbSubtitleAssembler->Reset();
if (length > 3) {
if (data[0] == 0x20 && data[1] == 0x00 && data[2] == 0x0F)
dvbSubtitleAssembler->Put(data + 2, length - 2);
else
dvbSubtitleAssembler->Put(data, length);
int Count;
while (true) {
unsigned char *b = dvbSubtitleAssembler->Get(Count);
if (b && b[0] == 0x0F) {
if (ExtractSegment(b, Count, pts) == -1)
break;
}
else
break;
}
}
}
return Length;
}
return 0;
}
#define LimitTo32Bit(n) (n & 0x00000000FFFFFFFFL)
#define MAXDELTA 40000 // max. reasonable PTS/STC delta in ms
void cDvbSubtitleConverter::Action(void)
{
int LastSetupLevel = setupLevel;
cTimeMs Timeout;
while (Running()) {
if (osd) {
int NewSetupLevel = setupLevel;
if (Timeout.TimedOut() || LastSetupLevel != NewSetupLevel) {
DELETENULL(osd);
}
LastSetupLevel = NewSetupLevel;
}
int WaitMs = 100;
Lock();
if (cDvbSubtitleBitmaps *sb = bitmaps->First()) {
int64_t STC = cDevice::PrimaryDevice()->GetSTC();
int64_t Delta = 0;
if (STC >= 0) {
Delta = LimitTo32Bit(sb->Pts()) - LimitTo32Bit(STC); // some devices only deliver 32 bits
if (Delta > (int64_t(1) << 31))
Delta -= (int64_t(1) << 32);
else if (Delta < -((int64_t(1) << 31) - 1))
Delta += (int64_t(1) << 32);
}
else {
//TODO sync on PTS? are there actually devices that don't deliver an STC?
}
Delta /= 90; // STC and PTS are in 1/90000s
if (Delta <= MAXDELTA) {
if (Delta <= 0) {
dbgconverter("Got %d bitmaps, showing #%d\n", bitmaps->Count(), sb->Index() + 1);
if (AssertOsd()) {
sb->Draw(osd);
Timeout.Set(sb->Timeout() * 1000);
dbgconverter("PTS: %lld STC: %lld (%lld) timeout: %d\n", sb->Pts(), cDevice::PrimaryDevice()->GetSTC(), Delta, sb->Timeout());
}
bitmaps->Del(sb);
}
else if (Delta < WaitMs)
WaitMs = Delta;
}
else
bitmaps->Del(sb);
}
Unlock();
cCondWait::SleepMs(WaitMs);
}
}
tColor cDvbSubtitleConverter::yuv2rgb(int Y, int Cb, int Cr)
{
int Ey, Epb, Epr;
int Eg, Eb, Er;
Ey = (Y - 16);
Epb = (Cb - 128);
Epr = (Cr - 128);
/* ITU-R 709 */
Er = max(min(((298 * Ey + 460 * Epr) / 256), 255), 0);
Eg = max(min(((298 * Ey - 55 * Epb - 137 * Epr) / 256), 255), 0);
Eb = max(min(((298 * Ey + 543 * Epb ) / 256), 255), 0);
return (Er << 16) | (Eg << 8) | Eb;
}
bool cDvbSubtitleConverter::AssertOsd(void)
{
return osd || (osd = cOsdProvider::NewOsd(0, Setup.SubtitleOffset, OSD_LEVEL_SUBTITLES));
}
int cDvbSubtitleConverter::ExtractSegment(const uchar *Data, int Length, int64_t Pts)
{
if (Length > 5 && Data[0] == 0x0F) {
int segmentLength = (Data[4] << 8) + Data[5] + 6;
if (segmentLength > Length)
return -1;
int segmentType = Data[1];
int pageId = (Data[2] << 8) + Data[3];
cDvbSubtitlePage *page = NULL;
LOCK_THREAD;
for (cDvbSubtitlePage *sp = pages->First(); sp; sp = pages->Next(sp)) {
if (sp->PageId() == pageId) {
page = sp;
break;
}
}
if (!page) {
page = new cDvbSubtitlePage(pageId);
pages->Add(page);
dbgpages("Create SubtitlePage %d (total pages = %d)\n", pageId, pages->Count());
}
if (Pts)
page->SetPts(Pts);
switch (segmentType) {
case PAGE_COMPOSITION_SEGMENT: {
dbgsegments("PAGE_COMPOSITION_SEGMENT\n");
int pageVersion = (Data[6 + 1] & 0xF0) >> 4;
if (pageVersion == page->Version())
break; // no update
page->SetVersion(pageVersion);
page->SetTimeout(Data[6]);
page->SetState((Data[6 + 1] & 0x0C) >> 2);
page->regions.Clear();
dbgpages("Update page id %d version %d pts %lld timeout %d state %d\n", pageId, page->Version(), page->Pts(), page->Timeout(), page->State());
for (int i = 6 + 2; i < segmentLength; i += 6) {
cSubtitleRegion *region = page->GetRegionById(Data[i], true);
region->SetHorizontalAddress((Data[i + 2] << 8) + Data[i + 3]);
region->SetVerticalAddress((Data[i + 4] << 8) + Data[i + 5]);
}
break;
}
case REGION_COMPOSITION_SEGMENT: {
dbgsegments("REGION_COMPOSITION_SEGMENT\n");
cSubtitleRegion *region = page->GetRegionById(Data[6]);
if (!region)
break;
int regionVersion = (Data[6 + 1] & 0xF0) >> 4;
if (regionVersion == region->Version())
break; // no update
region->SetVersion(regionVersion);
bool regionFillFlag = (Data[6 + 1] & 0x08) >> 3;
int regionWidth = (Data[6 + 2] << 8) | Data[6 + 3];
int regionHeight = (Data[6 + 4] << 8) | Data[6 + 5];
region->SetSize(regionWidth, regionHeight);
region->SetLevel((Data[6 + 6] & 0xE0) >> 5);
region->SetDepth((Data[6 + 6] & 0x1C) >> 2);
region->SetClutId(Data[6 + 7]);
dbgregions("Region pageId %d id %d version %d fill %d width %d height %d level %d depth %d clutId %d\n", pageId, region->RegionId(), region->Version(), regionFillFlag, regionWidth, regionHeight, region->Level(), region->Depth(), region->ClutId());
if (regionFillFlag) {
switch (region->Bpp()) {
case 2: region->FillRegion((Data[6 + 9] & 0x0C) >> 2); break;
case 4: region->FillRegion((Data[6 + 9] & 0xF0) >> 4); break;
case 8: region->FillRegion(Data[6 + 8]); break;
}
}
for (int i = 6 + 10; i < segmentLength; i += 6) {
cSubtitleObject *object = region->GetObjectById((Data[i] << 8) | Data[i + 1], true);
int objectType = (Data[i + 2] & 0xC0) >> 6;
object->SetCodingMethod(objectType);
object->SetProviderFlag((Data[i + 2] & 0x30) >> 4);
int objectHorizontalPosition = ((Data[i + 2] & 0x0F) << 8) | Data[i + 3];
int objectVerticalPosition = ((Data[i + 4] & 0x0F) << 8) | Data[i + 5];
object->SetPosition(objectHorizontalPosition, objectVerticalPosition);
if (objectType == 0x01 || objectType == 0x02) {
object->SetForegroundColor(Data[i + 6]);
object->SetBackgroundColor(Data[i + 7]);
i += 2;
}
}
break;
}
case CLUT_DEFINITION_SEGMENT: {
dbgsegments("CLUT_DEFINITION_SEGMENT\n");
cSubtitleClut *clut = page->GetClutById(Data[6], true);
int clutVersion = (Data[6 + 1] & 0xF0) >> 4;
if (clutVersion == clut->Version())
break; // no update
clut->SetVersion(clutVersion);
dbgcluts("Clut pageId %d id %d version %d\n", pageId, clut->ClutId(), clut->Version());
for (int i = 6 + 2; i < segmentLength; i += 2) {
uchar clutEntryId = Data[i];
bool fullRangeFlag = Data[i + 1] & 1;
uchar yval;
uchar crval;
uchar cbval;
uchar tval;
if (fullRangeFlag) {
yval = Data[i + 2];
crval = Data[i + 3];
cbval = Data[i + 4];
tval = Data[i + 5];
}
else {
yval = Data[i + 2] & 0xFC;
crval = (Data[i + 2] & 0x03) << 6;
crval |= (Data[i + 3] & 0xC0) >> 2;
cbval = (Data[i + 3] & 0x3C) << 2;
tval = (Data[i + 3] & 0x03) << 6;
}
tColor value = 0;
if (yval) {
value = yuv2rgb(yval, cbval, crval);
value |= ((10 - (clutEntryId ? Setup.SubtitleFgTransparency : Setup.SubtitleBgTransparency)) * (255 - tval) / 10) << 24;
}
int EntryFlags = Data[i + 1];
dbgcluts("%2d %d %d %d %08X\n", clutEntryId, (EntryFlags & 0x80) ? 2 : 0, (EntryFlags & 0x40) ? 4 : 0, (EntryFlags & 0x20) ? 8 : 0, value);
if ((EntryFlags & 0x80) != 0)
clut->SetColor(2, clutEntryId, value);
if ((EntryFlags & 0x40) != 0)
clut->SetColor(4, clutEntryId, value);
if ((EntryFlags & 0x20) != 0)
clut->SetColor(8, clutEntryId, value);
i += fullRangeFlag ? 4 : 2;
}
dbgcluts("\n");
page->UpdateRegionPalette(clut);
break;
}
case OBJECT_DATA_SEGMENT: {
dbgsegments("OBJECT_DATA_SEGMENT\n");
cSubtitleObject *object = page->GetObjectById((Data[6] << 8) | Data[6 + 1]);
if (!object)
break;
int objectVersion = (Data[6 + 2] & 0xF0) >> 4;
if (objectVersion == object->Version())
break; // no update
object->SetVersion(objectVersion);
int codingMethod = (Data[6 + 2] & 0x0C) >> 2;
object->SetNonModifyingColorFlag(Data[6 + 2] & 0x01);
dbgobjects("Object pageId %d id %d version %d method %d modify %d\n", pageId, object->ObjectId(), object->Version(), object->CodingMethod(), object->NonModifyingColorFlag());
if (codingMethod == 0) { // coding of pixels
int i = 6 + 3;
int topFieldLength = (Data[i] << 8) | Data[i + 1];
int bottomFieldLength = (Data[i + 2] << 8) | Data[i + 3];
object->DecodeSubBlock(Data + i + 4, topFieldLength, true);
if (bottomFieldLength)
object->DecodeSubBlock(Data + i + 4 + topFieldLength, bottomFieldLength, false);
else
object->DecodeSubBlock(Data + i + 4, topFieldLength, false);
}
else if (codingMethod == 1) { // coded as a string of characters
//TODO implement textual subtitles
}
break;
}
case END_OF_DISPLAY_SET_SEGMENT: {
dbgsegments("END_OF_DISPLAY_SET_SEGMENT\n");
FinishPage(page);
}
break;
default:
dbgsegments("*** unknown segment type: %02X\n", segmentType);
}
return segmentLength;
}
return -1;
}
void cDvbSubtitleConverter::FinishPage(cDvbSubtitlePage *Page)
{
if (!AssertOsd())
return;
tArea *Areas = Page->GetAreas();
int NumAreas = Page->regions.Count();
int Bpp = 8;
bool Reduced = false;
while (osd->CanHandleAreas(Areas, NumAreas) != oeOk) {
int HalfBpp = Bpp / 2;
if (HalfBpp >= 2) {
for (int i = 0; i < NumAreas; i++) {
if (Areas[i].bpp >= Bpp) {
Areas[i].bpp = HalfBpp;
Reduced = true;
}
}
Bpp = HalfBpp;
}
else
return; // unable to draw bitmaps
}
if (Reduced) {
for (int i = 0; i < NumAreas; i++) {
cSubtitleRegion *sr = Page->regions.Get(i);
if (sr->Bpp() != Areas[i].bpp) {
if (sr->Level() <= Areas[i].bpp) {
//TODO this is untested - didn't have any such subtitle stream
cSubtitleClut *Clut = Page->GetClutById(sr->ClutId());
if (Clut) {
dbgregions("reduce region %d bpp %d level %d area bpp %d\n", sr->RegionId(), sr->Bpp(), sr->Level(), Areas[i].bpp);
sr->ReduceBpp(*Clut->GetPalette(sr->Bpp()));
}
}
else {
dbgregions("condense region %d bpp %d level %d area bpp %d\n", sr->RegionId(), sr->Bpp(), sr->Level(), Areas[i].bpp);
sr->ShrinkBpp(Areas[i].bpp);
}
}
}
}
cDvbSubtitleBitmaps *Bitmaps = new cDvbSubtitleBitmaps(Page->Pts(), Page->Timeout(), Areas, NumAreas);
bitmaps->Add(Bitmaps);
for (cSubtitleRegion *sr = Page->regions.First(); sr; sr = Page->regions.Next(sr)) {
int posX = sr->HorizontalAddress();
int posY = sr->VerticalAddress();
cBitmap *bm = new cBitmap(sr->Width(), sr->Height(), sr->Bpp(), posX, posY);
bm->DrawBitmap(posX, posY, *sr);
Bitmaps->AddBitmap(bm);
}
}
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