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vdr/dvbsubtitle.c
Klaus Schmidinger 573449e935 Improved handling subtitles of BBC channels
2012-02-13 09:49:33 +01:00

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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 2.22 2012/02/13 09:48:18 kls Exp $
*/
#include "dvbsubtitle.h"
#define __STDC_FORMAT_MACROS // Required for format specifiers
#include <inttypes.h>
#include "device.h"
#include "libsi/si.h"
//#define FINISHPAGE_HACK
#define PAGE_COMPOSITION_SEGMENT 0x10
#define REGION_COMPOSITION_SEGMENT 0x11
#define CLUT_DEFINITION_SEGMENT 0x12
#define OBJECT_DATA_SEGMENT 0x13
#define DISPLAY_DEFINITION_SEGMENT 0x14
#define DISPARITY_SIGNALING_SEGMENT 0x15 // DVB BlueBook A156
#define END_OF_DISPLAY_SET_SEGMENT 0x80
#define STUFFING_SEGMENT 0xFF
// 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)
{
int a = 0, r = 0, g = 0, b = 0;
clutId = ClutId;
version = -1;
// ETSI EN 300 743 10.3: 4-entry CLUT default contents
palette2.SetColor(0, ArgbToColor( 0, 0, 0, 0));
palette2.SetColor(1, ArgbToColor(255, 255, 255, 255));
palette2.SetColor(2, ArgbToColor(255, 0, 0, 0));
palette2.SetColor(3, ArgbToColor(255, 127, 127, 127));
// ETSI EN 300 743 10.2: 16-entry CLUT default contents
palette4.SetColor(0, ArgbToColor(0, 0, 0, 0));
for (int i = 1; i < 16; ++i) {
if (i < 8) {
r = (i & 1) ? 255 : 0;
g = (i & 2) ? 255 : 0;
b = (i & 4) ? 255 : 0;
}
else {
r = (i & 1) ? 127 : 0;
g = (i & 2) ? 127 : 0;
b = (i & 4) ? 127 : 0;
}
palette4.SetColor(i, ArgbToColor(255, r, g, b));
}
// ETSI EN 300 743 10.1: 256-entry CLUT default contents
palette8.SetColor(0, ArgbToColor(0, 0, 0, 0));
for (int i = 1; i < 256; ++i) {
if (i < 8) {
r = (i & 1) ? 255 : 0;
g = (i & 2) ? 255 : 0;
b = (i & 4) ? 255 : 0;
a = 63;
}
else {
switch (i & 0x88) {
case 0x00:
r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0);
g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0);
b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0);
a = 255;
break;
case 0x08:
r = ((i & 1) ? 85 : 0) + ((i & 0x10) ? 170 : 0);
g = ((i & 2) ? 85 : 0) + ((i & 0x20) ? 170 : 0);
b = ((i & 4) ? 85 : 0) + ((i & 0x40) ? 170 : 0);
a = 127;
break;
case 0x80:
r = 127 + ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0);
g = 127 + ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0);
b = 127 + ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0);
a = 255;
break;
case 0x88:
r = ((i & 1) ? 43 : 0) + ((i & 0x10) ? 85 : 0);
g = ((i & 2) ? 43 : 0) + ((i & 0x20) ? 85 : 0);
b = ((i & 4) ? 43 : 0) + ((i & 0x40) ? 85 : 0);
a = 255;
break;
}
}
palette8.SetColor(i, ArgbToColor(a, r, g, b));
}
}
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;
uchar backgroundPixelCode;
uchar foregroundPixelCode;
int providerFlag;
int px;
int py;
cBitmap *bitmap;
char textData[Utf8BufSize(256)]; // number of character codes is an 8-bit field
void DrawLine(int x, int y, tIndex Index, int Length);
bool Decode2BppCodeString(cBitStream *bs, int&x, int y, const uint8_t *MapTable);
bool Decode4BppCodeString(cBitStream *bs, int&x, int y, const uint8_t *MapTable);
bool Decode8BppCodeString(cBitStream *bs, int&x, int y);
public:
cSubtitleObject(int ObjectId, cBitmap *Bitmap);
int ObjectId(void) { return objectId; }
int Version(void) { return version; }
int CodingMethod(void) { return codingMethod; }
uchar BackgroundPixelCode(void) { return backgroundPixelCode; }
uchar ForegroundPixelCode(void) { return foregroundPixelCode; }
const char *TextData(void) { return &textData[0]; }
int X(void) { return px; }
int Y(void) { return py; }
bool NonModifyingColorFlag(void) { return nonModifyingColorFlag; }
void DecodeCharacterString(const uchar *Data, int NumberOfCodes);
void DecodeSubBlock(const uchar *Data, int Length, bool Even);
void SetVersion(int Version) { version = Version; }
void SetBackgroundPixelCode(uchar BackgroundPixelCode) { backgroundPixelCode = BackgroundPixelCode; }
void SetForegroundPixelCode(uchar ForegroundPixelCode) { foregroundPixelCode = ForegroundPixelCode; }
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;
backgroundPixelCode = 0;
foregroundPixelCode = 0;
providerFlag = -1;
px = py = 0;
bitmap = Bitmap;
memset(textData, 0, sizeof(textData));
}
void cSubtitleObject::DecodeCharacterString(const uchar *Data, int NumberOfCodes)
{
if (NumberOfCodes > 0) {
bool singleByte;
const uchar *from = &Data[1];
int len = NumberOfCodes * 2 - 1;
cCharSetConv conv(SI::getCharacterTable(from, len, &singleByte));
if (singleByte) {
char txt[NumberOfCodes + 1];
char *p = txt;
for (int i = 2; i < NumberOfCodes; ++i) {
char c = Data[i * 2 + 1] & 0xFF;
if (c == 0)
break;
if (' ' <= c && c <= '~' || c == '\n' || 0xA0 <= c)
*(p++) = c;
else if (c == 0x8A)
*(p++) = '\n';
}
*p = 0;
const char *s = conv.Convert(txt);
Utf8Strn0Cpy(textData, s, Utf8StrLen(s));
}
else {
// TODO: add proper multibyte support for "UTF-16", "EUC-KR", "GB2312", "GBK", "UTF-8"
}
}
}
void cSubtitleObject::DecodeSubBlock(const uchar *Data, int Length, bool Even)
{
int x = 0;
int y = Even ? 0 : 1;
uint8_t map2to4[ 4] = { 0x00, 0x07, 0x08, 0x0F };
uint8_t map2to8[ 4] = { 0x00, 0x77, 0x88, 0xFF };
uint8_t map4to8[16] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF };
const uint8_t *mapTable = NULL;
cBitStream bs(Data, Length * 8);
while (!bs.IsEOF()) {
switch (bs.GetBits(8)) {
case 0x10:
dbgobjects("2-bit / pixel code string\n");
switch (bitmap->Bpp()) {
case 8: mapTable = map2to8; break;
case 4: mapTable = map2to4; break;
default: mapTable = NULL; break;
}
while (Decode2BppCodeString(&bs, x, y, mapTable) && !bs.IsEOF())
;
bs.ByteAlign();
break;
case 0x11:
dbgobjects("4-bit / pixel code string\n");
switch (bitmap->Bpp()) {
case 8: mapTable = map4to8; break;
default: mapTable = NULL; break;
}
while (Decode4BppCodeString(&bs, x, y, mapTable) && !bs.IsEOF())
;
bs.ByteAlign();
break;
case 0x12:
dbgobjects("8-bit / pixel code string\n");
while (Decode8BppCodeString(&bs, x, y) && !bs.IsEOF())
;
break;
case 0x20:
dbgobjects("sub block 2 to 4 map\n");
map2to4[0] = bs.GetBits(4);
map2to4[1] = bs.GetBits(4);
map2to4[2] = bs.GetBits(4);
map2to4[3] = bs.GetBits(4);
break;
case 0x21:
dbgobjects("sub block 2 to 8 map\n");
for (int i = 0; i < 4; ++i)
map2to8[i] = bs.GetBits(8);
break;
case 0x22:
dbgobjects("sub block 4 to 8 map\n");
for (int i = 0; i < 16; ++i)
map4to8[i] = bs.GetBits(8);
break;
case 0xF0:
dbgobjects("end of object line\n");
x = 0;
y += 2;
break;
default: dbgobjects("unknown sub block %s %d\n", __FUNCTION__, __LINE__);
}
}
}
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);
}
bool cSubtitleObject::Decode2BppCodeString(cBitStream *bs, int &x, int y, const uint8_t *MapTable)
{
int rl = 0;
int color = 0;
uchar code = bs->GetBits(2);
if (code) {
color = code;
rl = 1;
}
else if (bs->GetBit()) { // switch_1
rl = bs->GetBits(3) + 3;
color = bs->GetBits(2);
}
else if (bs->GetBit()) // switch_2
rl = 1; //color 0
else {
switch (bs->GetBits(2)) { // switch_3
case 0:
return false;
case 1:
rl = 2; //color 0
break;
case 2:
rl = bs->GetBits(4) + 12;
color = bs->GetBits(2);
break;
case 3:
rl = bs->GetBits(8) + 29;
color = bs->GetBits(2);
break;
default: ;
}
}
if (MapTable)
color = MapTable[color];
DrawLine(x, y, color, rl);
x += rl;
return true;
}
bool cSubtitleObject::Decode4BppCodeString(cBitStream *bs, int &x, int y, const uint8_t *MapTable)
{
int rl = 0;
int color = 0;
uchar code = bs->GetBits(4);
if (code) {
color = code;
rl = 1;
}
else if (bs->GetBit() == 0) { // switch_1
code = bs->GetBits(3);
if (code)
rl = code + 2; //color 0
else
return false;
}
else if (bs->GetBit() == 0) { // switch_2
rl = bs->GetBits(2) + 4;
color = bs->GetBits(4);
}
else {
switch (bs->GetBits(2)) { // switch_3
case 0: // color 0
rl = 1;
break;
case 1: // color 0
rl = 2;
break;
case 2:
rl = bs->GetBits(4) + 9;
color = bs->GetBits(4);
break;
case 3:
rl = bs->GetBits(8) + 25;
color = bs->GetBits(4);
break;
}
}
if (MapTable)
color = MapTable[color];
DrawLine(x, y, color, rl);
x += rl;
return true;
}
bool cSubtitleObject::Decode8BppCodeString(cBitStream *bs, int &x, int y)
{
int rl = 0;
int color = 0;
uchar code = bs->GetBits(8);
if (code) {
color = code;
rl = 1;
}
else if (bs->GetBit()) {
rl = bs->GetBits(7);
color = bs->GetBits(8);
}
else {
code = bs->GetBits(7);
if (code)
rl = code; // color 0
else
return false;
}
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;
int lineHeight;
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; }
void UpdateTextData(cSubtitleClut *Clut);
};
cSubtitleRegion::cSubtitleRegion(int RegionId)
:cBitmap(1, 1, 4)
{
regionId = RegionId;
version = -1;
clutId = -1;
horizontalAddress = 0;
verticalAddress = 0;
level = 0;
lineHeight = 26; // configurable subtitling font size
}
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::UpdateTextData(cSubtitleClut *Clut)
{
const cPalette *palette = Clut ? Clut->GetPalette(Depth()) : NULL;
for (cSubtitleObject *so = objects.First(); so && palette; so = objects.Next(so)) {
if (Utf8StrLen(so->TextData()) > 0) {
const cFont *font = cFont::GetFont(fontOsd);
cBitmap *tmp = new cBitmap(font->Width(so->TextData()), font->Height(), Depth());
double factor = (double)lineHeight / font->Height();
tmp->DrawText(0, 0, so->TextData(), palette->Color(so->ForegroundPixelCode()), palette->Color(so->BackgroundPixelCode()), font);
tmp = tmp->Scaled(factor, factor, true);
DrawBitmap(so->X(), so->Y(), *tmp);
DELETENULL(tmp);
}
}
}
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(double FactorX, double FactorY);
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(double FactorX, double FactorY)
{
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 = int(round(FactorX * sr->HorizontalAddress()));
a->y1 = int(round(FactorY * sr->VerticalAddress()));
a->x2 = int(round(FactorX * (sr->HorizontalAddress() + sr->Width() - 1)));
a->y2 = int(round(FactorY * (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: // acquisition 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;
default: dbgpages("unknown page state (%s %d)\n", __FUNCTION__, __LINE__);
}
}
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);
if (uchar *NewBuffer = (uchar *)realloc(data, Size)) {
size = Size;
data = NewBuffer;
}
else {
esyslog("ERROR: can't allocate memory for subtitle assembler");
length = 0;
size = 0;
free(data);
data = NULL;
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;
double osdFactorX;
double osdFactorY;
cVector<cBitmap *> bitmaps;
public:
cDvbSubtitleBitmaps(int64_t Pts, int Timeout, tArea *Areas, int NumAreas, double OsdFactorX, double OsdFactorY);
~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, double OsdFactorX, double OsdFactorY)
{
pts = Pts;
timeout = Timeout;
areas = Areas;
numAreas = NumAreas;
osdFactorX = OsdFactorX;
osdFactorY = OsdFactorY;
}
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)
{
bool Scale = !(DoubleEqual(osdFactorX, 1.0) && DoubleEqual(osdFactorY, 1.0));
bool AntiAlias = true;
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++)
Bpp[i] = areas[i].bpp = Bpp[i];
AntiAlias = false;
}
}
if (Osd->SetAreas(areas, numAreas) == oeOk) {
for (int i = 0; i < bitmaps.Size(); i++) {
cBitmap *b = bitmaps[i];
if (Scale)
b = b->Scaled(osdFactorX, osdFactorY, AntiAlias);
Osd->DrawBitmap(int(round(b->X0() * osdFactorX)), int(round(b->Y0() * osdFactorY)), *b);
if (b != bitmaps[i])
delete b;
}
Osd->Flush();
}
}
// --- cDvbSubtitleConverter -------------------------------------------------
int cDvbSubtitleConverter::setupLevel = 0;
cDvbSubtitleConverter::cDvbSubtitleConverter(void)
:cThread("subtitleConverter")
{
dvbSubtitleAssembler = new cDvbSubtitleAssembler;
osd = NULL;
frozen = false;
ddsVersionNumber = -1;
displayWidth = windowWidth = 720;
displayHeight = windowHeight = 576;
windowHorizontalOffset = 0;
windowVerticalOffset = 0;
SetOsdData();
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);
frozen = false;
ddsVersionNumber = -1;
displayWidth = windowWidth = 720;
displayHeight = windowHeight = 576;
windowHorizontalOffset = 0;
windowVerticalOffset = 0;
SetOsdData();
Unlock();
}
int cDvbSubtitleConverter::ConvertFragments(const uchar *Data, int Length)
{
if (Data && Length > 8) {
int PayloadOffset = PesPayloadOffset(Data);
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 = PesHasPts(Data) ? PesGetPts(Data) : 0;
if (pts)
dbgconverter("Converter PTS: %"PRId64"\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;
}
int cDvbSubtitleConverter::Convert(const uchar *Data, int Length)
{
if (Data && Length > 8) {
int PayloadOffset = PesPayloadOffset(Data);
if (Length > PayloadOffset) {
int64_t pts = PesGetPts(Data);
if (pts)
dbgconverter("Converter PTS: %"PRId64"\n", pts);
const uchar *data = Data + PayloadOffset;
int length = Length - PayloadOffset;
if (length > 3) {
if (data[0] == 0x20 && data[1] == 0x00 && data[2] == 0x0F) {
data += 2;
length -= 2;
}
const uchar *b = data;
while (length > 0) {
if (b[0] == 0x0F) {
int n = ExtractSegment(b, length, pts);
if (n < 0)
break;
b += n;
length -= n;
}
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()) {
int WaitMs = 100;
if (!frozen) {
LOCK_THREAD;
if (osd) {
int NewSetupLevel = setupLevel;
if (Timeout.TimedOut() || LastSetupLevel != NewSetupLevel) {
DELETENULL(osd);
}
LastSetupLevel = NewSetupLevel;
}
if (cDvbSubtitleBitmaps *sb = bitmaps->First()) {
int64_t STC = cDevice::PrimaryDevice()->GetSTC();
int64_t 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);
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: %"PRId64" STC: %"PRId64" (%"PRId64") timeout: %d\n", sb->Pts(), cDevice::PrimaryDevice()->GetSTC(), Delta, sb->Timeout());
}
bitmaps->Del(sb);
}
else if (Delta < WaitMs)
WaitMs = Delta;
}
else
bitmaps->Del(sb);
}
}
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;
}
void cDvbSubtitleConverter::SetOsdData(void)
{
int OsdWidth, OsdHeight;
double OsdAspect;
int VideoWidth, VideoHeight;
double VideoAspect;
cDevice::PrimaryDevice()->GetOsdSize(OsdWidth, OsdHeight, OsdAspect);
cDevice::PrimaryDevice()->GetVideoSize(VideoWidth, VideoHeight, VideoAspect);
if (OsdWidth == displayWidth && OsdHeight == displayHeight || DoubleEqual(VideoAspect, 1.0)) {
osdFactorX = osdFactorY = 1.0;
osdDeltaX = osdDeltaY = 0;
}
else {
osdFactorX = VideoAspect * OsdHeight / displayWidth;
osdFactorY = double(OsdHeight) / displayHeight;
osdDeltaX = (OsdWidth - displayWidth * osdFactorX) / 2;
osdDeltaY = (OsdHeight - displayHeight * osdFactorY) / 2;
}
}
bool cDvbSubtitleConverter::AssertOsd(void)
{
LOCK_THREAD;
return osd || (osd = cOsdProvider::NewOsd(int(round(osdFactorX * windowHorizontalOffset + osdDeltaX)), int(round(osdFactorY * windowVerticalOffset + osdDeltaY)) + Setup.SubtitleOffset, OSD_LEVEL_SUBTITLES));
}
int cDvbSubtitleConverter::ExtractSegment(const uchar *Data, int Length, int64_t Pts)
{
cBitStream bs(Data, Length * 8);
if (Length > 5 && bs.GetBits(8) == 0x0F) { // sync byte
int segmentType = bs.GetBits(8);
if (segmentType == STUFFING_SEGMENT)
return -1;
int pageId = bs.GetBits(16);
int segmentLength = bs.GetBits(16);
if (!bs.SetLength(bs.Index() + segmentLength * 8))
return -1;
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 pageTimeout = bs.GetBits(8);
int pageVersion = bs.GetBits(4);
if (pageVersion == page->Version())
break; // no update
page->SetVersion(pageVersion);
page->SetTimeout(pageTimeout);
page->SetState(bs.GetBits(2));
bs.SkipBits(2); // reserved
dbgpages("Update page id %d version %d pts %"PRId64" timeout %d state %d\n", pageId, page->Version(), page->Pts(), page->Timeout(), page->State());
while (!bs.IsEOF()) {
cSubtitleRegion *region = page->GetRegionById(bs.GetBits(8), true);
bs.SkipBits(8); // reserved
region->SetHorizontalAddress(bs.GetBits(16));
region->SetVerticalAddress(bs.GetBits(16));
}
break;
}
case REGION_COMPOSITION_SEGMENT: {
dbgsegments("REGION_COMPOSITION_SEGMENT\n");
cSubtitleRegion *region = page->GetRegionById(bs.GetBits(8));
if (!region)
break;
int regionVersion = bs.GetBits(4);
if (regionVersion == region->Version())
break; // no update
region->SetVersion(regionVersion);
bool regionFillFlag = bs.GetBit();
bs.SkipBits(3); // reserved
int regionWidth = bs.GetBits(16);
if (regionWidth < 1)
regionWidth = 1;
int regionHeight = bs.GetBits(16);
if (regionHeight < 1)
regionHeight = 1;
region->SetSize(regionWidth, regionHeight);
region->SetLevel(bs.GetBits(3));
region->SetDepth(bs.GetBits(3));
bs.SkipBits(2); // reserved
region->SetClutId(bs.GetBits(8));
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());
int region8bitPixelCode = bs.GetBits(8);
int region4bitPixelCode = bs.GetBits(4);
int region2bitPixelCode = bs.GetBits(2);
bs.SkipBits(2); // reserved
if (regionFillFlag) {
switch (region->Bpp()) {
case 2: region->FillRegion(region8bitPixelCode); break;
case 4: region->FillRegion(region4bitPixelCode); break;
case 8: region->FillRegion(region2bitPixelCode); break;
default: dbgregions("unknown bpp %d (%s %d)\n", region->Bpp(), __FUNCTION__, __LINE__);
}
}
while (!bs.IsEOF()) {
cSubtitleObject *object = region->GetObjectById(bs.GetBits(16), true);
int objectType = bs.GetBits(2);
object->SetCodingMethod(objectType);
object->SetProviderFlag(bs.GetBits(2));
int objectHorizontalPosition = bs.GetBits(12);
bs.SkipBits(4); // reserved
int objectVerticalPosition = bs.GetBits(12);
object->SetPosition(objectHorizontalPosition, objectVerticalPosition);
if (objectType == 0x01 || objectType == 0x02) {
object->SetForegroundPixelCode(bs.GetBits(8));
object->SetBackgroundPixelCode(bs.GetBits(8));
}
}
break;
}
case CLUT_DEFINITION_SEGMENT: {
dbgsegments("CLUT_DEFINITION_SEGMENT\n");
cSubtitleClut *clut = page->GetClutById(bs.GetBits(8), true);
int clutVersion = bs.GetBits(4);
if (clutVersion == clut->Version())
break; // no update
clut->SetVersion(clutVersion);
bs.SkipBits(4); // reserved
dbgcluts("Clut pageId %d id %d version %d\n", pageId, clut->ClutId(), clut->Version());
while (!bs.IsEOF()) {
uchar clutEntryId = bs.GetBits(8);
bool entryClut2Flag = bs.GetBit();
bool entryClut4Flag = bs.GetBit();
bool entryClut8Flag = bs.GetBit();
bs.SkipBits(4); // reserved
uchar yval;
uchar crval;
uchar cbval;
uchar tval;
if (bs.GetBit()) { // full_range_flag
yval = bs.GetBits(8);
crval = bs.GetBits(8);
cbval = bs.GetBits(8);
tval = bs.GetBits(8);
}
else {
yval = bs.GetBits(6) << 2;
crval = bs.GetBits(4) << 4;
cbval = bs.GetBits(4) << 4;
tval = bs.GetBits(2) << 6;
}
tColor value = 0;
if (yval) {
value = yuv2rgb(yval, cbval, crval);
value |= ((10 - (clutEntryId ? Setup.SubtitleFgTransparency : Setup.SubtitleBgTransparency)) * (255 - tval) / 10) << 24;
}
dbgcluts("%2d %d %d %d %08X\n", clutEntryId, entryClut2Flag ? 2 : 0, entryClut4Flag ? 4 : 0, entryClut8Flag ? 8 : 0, value);
if (entryClut2Flag)
clut->SetColor(2, clutEntryId, value);
if (entryClut4Flag)
clut->SetColor(4, clutEntryId, value);
if (entryClut8Flag)
clut->SetColor(8, clutEntryId, value);
}
dbgcluts("\n");
page->UpdateRegionPalette(clut);
break;
}
case OBJECT_DATA_SEGMENT: {
dbgsegments("OBJECT_DATA_SEGMENT\n");
cSubtitleObject *object = page->GetObjectById(bs.GetBits(16));
if (!object)
break;
int objectVersion = bs.GetBits(4);
if (objectVersion == object->Version())
break; // no update
object->SetVersion(objectVersion);
int codingMethod = bs.GetBits(2);
object->SetNonModifyingColorFlag(bs.GetBit());
bs.SkipBit(); // reserved
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 topFieldLength = bs.GetBits(16);
int bottomFieldLength = bs.GetBits(16);
object->DecodeSubBlock(bs.GetData(), topFieldLength, true);
if (bottomFieldLength)
object->DecodeSubBlock(bs.GetData() + topFieldLength, bottomFieldLength, false);
else
object->DecodeSubBlock(bs.GetData(), topFieldLength, false);
bs.WordAlign();
}
else if (codingMethod == 1) { // coded as a string of characters
int numberOfCodes = bs.GetBits(8);
object->DecodeCharacterString(bs.GetData(), numberOfCodes);
}
#ifdef FINISHPAGE_HACK
FinishPage(page); // flush to OSD right away
#endif
break;
}
case DISPLAY_DEFINITION_SEGMENT: {
dbgsegments("DISPLAY_DEFINITION_SEGMENT\n");
int version = bs.GetBits(4);
if (version != ddsVersionNumber) {
bool displayWindowFlag = bs.GetBit();
windowHorizontalOffset = 0;
windowVerticalOffset = 0;
bs.SkipBits(3); // reserved
displayWidth = windowWidth = bs.GetBits(16) + 1;
displayHeight = windowHeight = bs.GetBits(16) + 1;
if (displayWindowFlag) {
windowHorizontalOffset = bs.GetBits(16); // displayWindowHorizontalPositionMinimum
windowWidth = bs.GetBits(16) - windowHorizontalOffset + 1; // displayWindowHorizontalPositionMaximum
windowVerticalOffset = bs.GetBits(16); // displayWindowVerticalPositionMinimum
windowHeight = bs.GetBits(16) - windowVerticalOffset + 1; // displayWindowVerticalPositionMaximum
}
SetOsdData();
SetupChanged();
ddsVersionNumber = version;
}
break;
}
case DISPARITY_SIGNALING_SEGMENT: {
dbgsegments("DISPARITY_SIGNALING_SEGMENT\n");
bs.SkipBits(4); // dss_version_number
bool disparity_shift_update_sequence_page_flag = bs.GetBit();
bs.SkipBits(3); // reserved
bs.SkipBits(8); // page_default_disparity_shift
if (disparity_shift_update_sequence_page_flag) {
bs.SkipBits(8); // disparity_shift_update_sequence_length
bs.SkipBits(24); // interval_duration[23..0]
int division_period_count = bs.GetBits(8);
for (int i = 0; i < division_period_count; ++i) {
bs.SkipBits(8); // interval_count
bs.SkipBits(8); // disparity_shift_update_integer_part
}
}
while (!bs.IsEOF()) {
bs.SkipBits(8); // region_id
bool disparity_shift_update_sequence_region_flag = bs.GetBit();
bs.SkipBits(5); // reserved
int number_of_subregions_minus_1 = bs.GetBits(2);
for (int i = 0; i <= number_of_subregions_minus_1; ++i) {
if (number_of_subregions_minus_1 > 0) {
bs.SkipBits(16); // subregion_horizontal_position
bs.SkipBits(16); // subregion_width
}
bs.SkipBits(8); // subregion_disparity_shift_integer_part
bs.SkipBits(4); // subregion_disparity_shift_fractional_part
bs.SkipBits(4); // reserved
if (disparity_shift_update_sequence_region_flag) {
bs.SkipBits(8); // disparity_shift_update_sequence_length
bs.SkipBits(24); // interval_duration[23..0]
int division_period_count = bs.GetBits(8);
for (int i = 0; i < division_period_count; ++i) {
bs.SkipBits(8); // interval_count
bs.SkipBits(8); // disparity_shift_update_integer_part
}
}
}
}
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 bs.Length() / 8;
}
return -1;
}
void cDvbSubtitleConverter::FinishPage(cDvbSubtitlePage *Page)
{
if (!AssertOsd())
return;
tArea *Areas = Page->GetAreas(osdFactorX, osdFactorY);
int NumAreas = Page->regions.Count();
int Bpp = 8;
bool Reduced = false;
while (osd && 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, osdFactorX, osdFactorY);
bitmaps->Add(Bitmaps);
for (cSubtitleRegion *sr = Page->regions.First(); sr; sr = Page->regions.Next(sr)) {
sr->UpdateTextData(Page->GetClutById(sr->ClutId()));
int posX = sr->HorizontalAddress();
int posY = sr->VerticalAddress();
if (sr->Width() > 0 && sr->Height() > 0) {
cBitmap *bm = new cBitmap(sr->Width(), sr->Height(), sr->Bpp(), posX, posY);
bm->DrawBitmap(posX, posY, *sr);
Bitmaps->AddBitmap(bm);
}
}
}
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