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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 Schluessler <marco@lordzodiac.de>
* With some input from the "subtitles plugin" by Pekka Virtanen <pekka.virtanen@sci.fi>
*
* $Id: dvbsubtitle.c 5.2 2022/12/06 16:57:01 kls Exp $
*/
#include "dvbsubtitle.h"
#define __STDC_FORMAT_MACROS // Required for format specifiers
#include <inttypes.h>
#include "device.h"
#include "libsi/si.h"
#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
#define PGS_PALETTE_SEGMENT 0x14
#define PGS_OBJECT_SEGMENT 0x15
#define PGS_PRESENTATION_SEGMENT 0x16
#define PGS_WINDOW_SEGMENT 0x17
#define PGS_DISPLAY_SEGMENT 0x80
// Set these to 'true' for debug output, which is written into the file dbg-log.htm
// in the current working directory. The HTML file shows the actual bitmaps (dbg-nnn.jpg)
// used to display the subtitles.
static bool DebugNormal = false; // shows pages, regions and objects
static bool DebugVerbose = false; // shows everything
static bool DebugDisplay = DebugVerbose || DebugNormal;
static bool DebugPages = DebugVerbose || DebugNormal;
static bool DebugRegions = DebugVerbose || DebugNormal;
static bool DebugObjects = DebugVerbose || DebugNormal;
static bool DebugConverter = DebugVerbose;
static bool DebugSegments = DebugVerbose;
static bool DebugPixel = DebugVerbose;
static bool DebugCluts = DebugVerbose;
static bool DebugOutput = DebugVerbose;
#define dbgdisplay(a...) if (DebugDisplay) SD.WriteHtml(a)
#define dbgpages(a...) if (DebugPages) SD.WriteHtml(a)
#define dbgregions(a...) if (DebugRegions) SD.WriteHtml(a)
#define dbgobjects(a...) if (DebugObjects) SD.WriteHtml(a)
#define dbgconverter(a...) if (DebugConverter) SD.WriteHtml(a)
#define dbgsegments(a...) if (DebugSegments) SD.WriteHtml(a)
#define dbgpixel(a...) if (DebugPixel) SD.WriteHtml(a)
#define dbgcluts(a...) if (DebugCluts) SD.WriteHtml(a)
#define dbgoutput(a...) if (DebugOutput) SD.WriteHtml(a)
#define DBGMAXBITMAPS 100 // debug output will be stopped after this many bitmaps
#define DBGBITMAPWIDTH 400
#define FIX_SUBTITLE_VERSION_BROADCASTER_STUPIDITY // some don't properly handle version numbers, which renders them useless because subtitles are not displayed
// --- cSubtitleDebug --------------------------------------------------------
class cSubtitleDebug {
private:
cMutex mutex;
int imgCnt;
int64_t firstPts;
bool newFile;
double factor;
public:
cSubtitleDebug(void) { Reset(); }
void Reset(void);
bool Active(void) { return imgCnt < DBGMAXBITMAPS; }
int64_t FirstPts(void) { return firstPts; }
void SetFirstPts(int64_t FirstPts) { if (firstPts < 0) firstPts = FirstPts; }
void SetFactor(double Factor) { factor = Factor; }
cString WriteJpeg(const cBitmap *Bitmap, int MaxX = 0, int MaxY = 0);
void WriteHtml(const char *Format, ...);
};
void cSubtitleDebug::Reset(void)
{
imgCnt = 0;
firstPts = -1;
newFile = true;
factor = 1.0;
}
cString cSubtitleDebug::WriteJpeg(const cBitmap *Bitmap, int MaxX, int MaxY)
{
if (!Active())
return NULL;
cMutexLock MutexLock(&mutex);
cBitmap *Scaled = Bitmap->Scaled(factor, factor, true);
int w = MaxX ? int(round(MaxX * factor)) : Scaled->Width();
int h = MaxY ? int(round(MaxY * factor)) : Scaled->Height();
uchar mem[w * h * 3];
for (int x = 0; x < w; x++) {
for (int y = 0; y < h; y++) {
tColor c = Scaled->GetColor(x, y);
int o = (y * w + x) * 3;
mem[o++] = (c & 0x00FF0000) >> 16;
mem[o++] = (c & 0x0000FF00) >> 8;
mem[o] = (c & 0x000000FF);
}
}
delete Scaled;
int Size = 0;
uchar *Jpeg = RgbToJpeg(mem, w, h, Size);
cString ImgName = cString::sprintf("dbg-%03d.jpg", imgCnt++);
int f = open(ImgName, O_WRONLY | O_CREAT, DEFFILEMODE);
if (f >= 0) {
if (write(f, Jpeg, Size) < 0)
LOG_ERROR_STR(*ImgName);
close(f);
}
free(Jpeg);
return ImgName;
}
void cSubtitleDebug::WriteHtml(const char *Format, ...)
{
if (!Active())
return;
cMutexLock MutexLock(&mutex);
if (FILE *f = fopen("dbg-log.htm", newFile ? "w" : "a")) {
va_list ap;
va_start(ap, Format);
vfprintf(f, Format, ap);
va_end(ap);
fclose(f);
newFile = false;
}
}
static cSubtitleDebug SD;
// --- cSubtitleClut ---------------------------------------------------------
class cSubtitleClut : public cListObject {
private:
int clutId;
int clutVersionNumber;
cPalette palette2;
cPalette palette4;
cPalette palette8;
tColor yuv2rgb(int Y, int Cb, int Cr);
void SetColor(int Bpp, int Index, tColor Color);
public:
cSubtitleClut(int ClutId);
void Parse(cBitStream &bs);
void ParsePgs(cBitStream &bs);
int ClutId(void) { return clutId; }
int ClutVersionNumber(void) { return clutVersionNumber; }
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;
clutVersionNumber = -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::Parse(cBitStream &bs)
{
int Version = bs.GetBits(4);
#ifndef FIX_SUBTITLE_VERSION_BROADCASTER_STUPIDITY
if (clutVersionNumber == Version)
return; // no update
#endif
clutVersionNumber = Version;
bs.SkipBits(4); // reserved
dbgcluts("<b>clut</b> id %d version %d<br>\n", clutId, clutVersionNumber);
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<br>\n", clutEntryId, entryClut2Flag ? 2 : 0, entryClut4Flag ? 4 : 0, entryClut8Flag ? 8 : 0, value);
if (entryClut2Flag)
SetColor(2, clutEntryId, value);
if (entryClut4Flag)
SetColor(4, clutEntryId, value);
if (entryClut8Flag)
SetColor(8, clutEntryId, value);
}
}
void cSubtitleClut::ParsePgs(cBitStream &bs)
{
int Version = bs.GetBits(8);
if (clutVersionNumber == Version)
return; // no update
clutVersionNumber = Version;
dbgcluts("<b>clut</b> id %d version %d<br>\n", clutId, clutVersionNumber);
for (int i = 0; i < 256; ++i)
SetColor(8, i, ArgbToColor(0, 0, 0, 0));
while (!bs.IsEOF()) {
uchar clutEntryId = bs.GetBits(8);
uchar yval = bs.GetBits(8);
uchar crval = bs.GetBits(8);
uchar cbval = bs.GetBits(8);
uchar tval = bs.GetBits(8);
tColor value = 0;
if (yval) {
value = yuv2rgb(yval, cbval, crval);
value |= ((10 - (clutEntryId ? Setup.SubtitleFgTransparency : Setup.SubtitleBgTransparency)) * tval / 10) << 24;
}
dbgcluts("%2d %08X<br>\n", clutEntryId, value);
SetColor(8, clutEntryId, value);
}
}
tColor cSubtitleClut::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 = constrain((298 * Ey + 460 * Epr) / 256, 0, 255);
Eg = constrain((298 * Ey - 55 * Epb - 137 * Epr) / 256, 0, 255);
Eb = constrain((298 * Ey + 543 * Epb ) / 256, 0, 255);
return (Er << 16) | (Eg << 8) | Eb;
}
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 objectVersionNumber;
int objectCodingMethod;
bool nonModifyingColorFlag;
int topLength;
int botLength;
int topIndex;
uchar *topData;
uchar *botData;
char *txtData;
int lineHeight;
void DrawLine(cBitmap *Bitmap, int x, int y, tIndex Index, int Length);
bool Decode2BppCodeString(cBitmap *Bitmap, int px, int py, cBitStream *bs, int&x, int y, const uint8_t *MapTable);
bool Decode4BppCodeString(cBitmap *Bitmap, int px, int py, cBitStream *bs, int&x, int y, const uint8_t *MapTable);
bool Decode8BppCodeString(cBitmap *Bitmap, int px, int py, cBitStream *bs, int&x, int y);
bool DecodePgsCodeString(cBitmap *Bitmap, int px, int py, cBitStream *bs, int&x, int y);
void DecodeSubBlock(cBitmap *Bitmap, int px, int py, const uchar *Data, int Length, bool Even);
void DecodeCharacterString(const uchar *Data, int NumberOfCodes);
public:
cSubtitleObject(int ObjectId);
~cSubtitleObject();
void Parse(cBitStream &bs);
void ParsePgs(cBitStream &bs);
int ObjectId(void) { return objectId; }
int ObjectVersionNumber(void) { return objectVersionNumber; }
int ObjectCodingMethod(void) { return objectCodingMethod; }
bool NonModifyingColorFlag(void) { return nonModifyingColorFlag; }
void Render(cBitmap *Bitmap, int px, int py, tIndex IndexFg, tIndex IndexBg);
};
cSubtitleObject::cSubtitleObject(int ObjectId)
{
objectId = ObjectId;
objectVersionNumber = -1;
objectCodingMethod = -1;
nonModifyingColorFlag = false;
topLength = 0;
botLength = 0;
topIndex = 0;
topData = NULL;
botData = NULL;
txtData = NULL;
lineHeight = 26; // configurable subtitling font size?
}
cSubtitleObject::~cSubtitleObject()
{
free(topData);
free(botData);
free(txtData);
}
void cSubtitleObject::Parse(cBitStream &bs)
{
int Version = bs.GetBits(4);
#ifndef FIX_SUBTITLE_VERSION_BROADCASTER_STUPIDITY
if (objectVersionNumber == Version)
return; // no update
#endif
objectVersionNumber = Version;
objectCodingMethod = bs.GetBits(2);
nonModifyingColorFlag = bs.GetBit();
bs.SkipBit(); // reserved
dbgobjects("<b>object</b> id %d version %d method %d modify %d", objectId, objectVersionNumber, objectCodingMethod, nonModifyingColorFlag); // no "<br>\n" here, DecodeCharacterString() may add data
if (objectCodingMethod == 0) { // coding of pixels
topLength = bs.GetBits(16);
botLength = bs.GetBits(16);
free(topData);
if ((topData = MALLOC(uchar, topLength)) != NULL)
memcpy(topData, bs.GetData(), topLength);
else
topLength = 0;
free(botData);
if ((botData = MALLOC(uchar, botLength)) != NULL)
memcpy(botData, bs.GetData() + topLength, botLength);
else
botLength = 0;
bs.WordAlign();
}
else if (objectCodingMethod == 1) { // coded as a string of characters
int numberOfCodes = bs.GetBits(8);
DecodeCharacterString(bs.GetData(), numberOfCodes);
}
dbgobjects("<br>\n");
if (DebugObjects) {
// We can't get the actual clut here, so we use a default one. This may lead to
// funny colors, but we just want to get a rough idea of what's in the object, anyway.
cSubtitleClut Clut(0);
cBitmap b(1920, 1080, 8);
b.Replace(*Clut.GetPalette(b.Bpp()));
b.Clean();
Render(&b, 0, 0, 0, 1);
int x1, y1, x2, y2;
if (b.Dirty(x1, y1, x2, y2)) {
cString ImgName = SD.WriteJpeg(&b, x2, y2);
dbgobjects("<img src=\"%s\"><br>\n", *ImgName);
}
}
}
void cSubtitleObject::ParsePgs(cBitStream &bs)
{
int Version = bs.GetBits(8);
if (objectVersionNumber == Version)
return; // no update
objectVersionNumber = Version;
objectCodingMethod = 0;
int sequenceDescriptor = bs.GetBits(8);
if (!(sequenceDescriptor & 0x80) && topData != NULL) {
memcpy(topData + topIndex, bs.GetData(), (bs.Length() - bs.Index()) / 8);
topIndex += (bs.Length() - bs.Index()) / 8;
return;
}
topLength = bs.GetBits(24) - 4 + 1; // exclude width / height, add sub block type
bs.SkipBits(32);
if ((topData = MALLOC(uchar, topLength)) != NULL) {
topData[topIndex++] = 0xFF; // PGS end of line
memcpy(topData + 1, bs.GetData(), (bs.Length() - bs.Index()) / 8);
topIndex += (bs.Length() - bs.Index()) / 8 + 1;
}
dbgobjects("<b>object</b> id %d version %d method %d modify %d", objectId, objectVersionNumber, objectCodingMethod, nonModifyingColorFlag);
}
void cSubtitleObject::DecodeCharacterString(const uchar *Data, int NumberOfCodes)
{
// "ETSI EN 300 743 V1.3.1 (2006-11)", chapter 7.2.5 "Object data segment" specifies
// character_code to be a 16-bit index number into the character table identified
// in the subtitle_descriptor. However, the "subtitling_descriptor" <sic> according to
// "ETSI EN 300 468 V1.13.1 (2012-04)" doesn't contain a "character table identifier".
// It only contains a three letter language code, without any specification as to how
// this is related to a specific character table.
// Apparently the first "code" in textual subtitles contains the character table
// identifier, and all codes are 8-bit only. So let's first make Data a string of
// 8-bit characters:
if (NumberOfCodes > 0) {
char txt[NumberOfCodes + 1];
for (int i = 0; i < NumberOfCodes; i++)
txt[i] = Data[i * 2 + 1];
txt[NumberOfCodes] = 0;
const uchar *from = (uchar *)txt;
int len = NumberOfCodes;
const char *CharacterTable = SI::getCharacterTable(from, len);
dbgobjects(" table %s raw '%s'", CharacterTable, from);
cCharSetConv conv(CharacterTable, cCharSetConv::SystemCharacterTable());
const char *s = conv.Convert((const char *)from);
dbgobjects(" conv '%s'", s);
free(txtData);
txtData = strdup(s);
}
}
void cSubtitleObject::DecodeSubBlock(cBitmap *Bitmap, int px, int py, 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:
dbgpixel("2-bit / pixel code string<br>\n");
switch (Bitmap->Bpp()) {
case 8: mapTable = map2to8; break;
case 4: mapTable = map2to4; break;
default: mapTable = NULL; break;
}
while (Decode2BppCodeString(Bitmap, px, py, &bs, x, y, mapTable) && !bs.IsEOF())
;
bs.ByteAlign();
break;
case 0x11:
dbgpixel("4-bit / pixel code string<br>\n");
switch (Bitmap->Bpp()) {
case 8: mapTable = map4to8; break;
default: mapTable = NULL; break;
}
while (Decode4BppCodeString(Bitmap, px, py, &bs, x, y, mapTable) && !bs.IsEOF())
;
bs.ByteAlign();
break;
case 0x12:
dbgpixel("8-bit / pixel code string<br>\n");
while (Decode8BppCodeString(Bitmap, px, py, &bs, x, y) && !bs.IsEOF())
;
break;
case 0x20:
dbgpixel("sub block 2 to 4 map<br>\n");
for (int i = 0; i < 4; ++i)
map2to4[i] = bs.GetBits(4);
break;
case 0x21:
dbgpixel("sub block 2 to 8 map<br>\n");
for (int i = 0; i < 4; ++i)
map2to8[i] = bs.GetBits(8);
break;
case 0x22:
dbgpixel("sub block 4 to 8 map<br>\n");
for (int i = 0; i < 16; ++i)
map4to8[i] = bs.GetBits(8);
break;
case 0xF0:
dbgpixel("end of object line<br>\n");
x = 0;
y += 2;
break;
case 0xFF:
dbgpixel("PGS code string, including EOLs<br>\n");
while (DecodePgsCodeString(Bitmap, px, py, &bs, x, y) && !bs.IsEOF()) {
x = 0;
y++;
}
break;
default: dbgpixel("unknown sub block %s %d<br>\n", __FUNCTION__, __LINE__);
}
}
}
void cSubtitleObject::DrawLine(cBitmap *Bitmap, int x, int y, tIndex Index, int Length)
{
if (nonModifyingColorFlag && Index == 1)
return;
for (int pos = x; pos < x + Length; pos++)
Bitmap->SetIndex(pos, y, Index);
}
bool cSubtitleObject::Decode2BppCodeString(cBitmap *Bitmap, int px, int py, 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(Bitmap, px + x, py + y, color, rl);
x += rl;
return true;
}
bool cSubtitleObject::Decode4BppCodeString(cBitmap *Bitmap, int px, int py, 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(Bitmap, px + x, py + y, color, rl);
x += rl;
return true;
}
bool cSubtitleObject::Decode8BppCodeString(cBitmap *Bitmap, int px, int py, 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(Bitmap, px + x, py + y, color, rl);
x += rl;
return true;
}
bool cSubtitleObject::DecodePgsCodeString(cBitmap *Bitmap, int px, int py, cBitStream *bs, int &x, int y)
{
while (!bs->IsEOF()) {
int color = bs->GetBits(8);
int rl = 1;
if (!color) {
int flags = bs->GetBits(8);
rl = flags & 0x3f;
if (flags & 0x40)
rl = (rl << 8) + bs->GetBits(8);
color = flags & 0x80 ? bs->GetBits(8) : 0;
}
if (rl > 0) {
DrawLine(Bitmap, px + x, py + y, color, rl);
x += rl;
}
else if (!rl)
return true;
}
return false;
}
void cSubtitleObject::Render(cBitmap *Bitmap, int px, int py, tIndex IndexFg, tIndex IndexBg)
{
if (objectCodingMethod == 0) { // coding of pixels
DecodeSubBlock(Bitmap, px, py, topData, topLength, true);
if (botLength)
DecodeSubBlock(Bitmap, px, py, botData, botLength, false);
else
DecodeSubBlock(Bitmap, px, py, topData, topLength, false);
}
else if (objectCodingMethod == 1) { // coded as a string of characters
if (txtData) {
//TODO couldn't we draw the text directly into Bitmap?
cFont *font = cFont::CreateFont(Setup.FontOsd, Setup.FontOsdSize);
cBitmap tmp(font->Width(txtData), font->Height(), Bitmap->Bpp());
double factor = (double)lineHeight / font->Height();
tmp.DrawText(0, 0, txtData, Bitmap->Color(IndexFg), Bitmap->Color(IndexBg), font);
cBitmap *scaled = tmp.Scaled(factor, factor, true);
Bitmap->DrawBitmap(px, py, *scaled);
delete scaled;
delete font;
}
}
}
// --- cSubtitleObjects ------------------------------------------------------
class cSubtitleObjects : public cList<cSubtitleObject> {
public:
cSubtitleObject *GetObjectById(int ObjectId, bool New = false);
};
cSubtitleObject *cSubtitleObjects::GetObjectById(int ObjectId, bool New)
{
for (cSubtitleObject *so = First(); so; so = Next(so)) {
if (so->ObjectId() == ObjectId)
return so;
}
if (!New)
return NULL;
cSubtitleObject *Object = new cSubtitleObject(ObjectId);
Add(Object);
return Object;
}
// --- cSubtitleObjectRef ----------------------------------------------------
class cSubtitleObjectRef : public cListObject {
protected:
int objectId;
int objectType;
int objectProviderFlag;
int objectHorizontalPosition;
int objectVerticalPosition;
int foregroundPixelCode;
int backgroundPixelCode;
public:
cSubtitleObjectRef(void);
cSubtitleObjectRef(cBitStream &bs);
int ObjectId(void) { return objectId; }
int ObjectType(void) { return objectType; }
int ObjectProviderFlag(void) { return objectProviderFlag; }
int ObjectHorizontalPosition(void) { return objectHorizontalPosition; }
int ObjectVerticalPosition(void) { return objectVerticalPosition; }
int ForegroundPixelCode(void) { return foregroundPixelCode; }
int BackgroundPixelCode(void) { return backgroundPixelCode; }
};
cSubtitleObjectRef::cSubtitleObjectRef(void)
{
objectId = 0;
objectType = 0;
objectProviderFlag = 0;
objectHorizontalPosition = 0;
objectVerticalPosition = 0;
foregroundPixelCode = 0;
backgroundPixelCode = 0;
}
cSubtitleObjectRef::cSubtitleObjectRef(cBitStream &bs)
{
objectId = bs.GetBits(16);
objectType = bs.GetBits(2);
objectProviderFlag = bs.GetBits(2);
objectHorizontalPosition = bs.GetBits(12);
bs.SkipBits(4); // reserved
objectVerticalPosition = bs.GetBits(12);
if (objectType == 0x01 || objectType == 0x02) {
foregroundPixelCode = bs.GetBits(8);
backgroundPixelCode = bs.GetBits(8);
}
else {
foregroundPixelCode = 0;
backgroundPixelCode = 0;
}
dbgregions("<b>objectref</b> id %d type %d flag %d x %d y %d fg %d bg %d<br>\n", objectId, objectType, objectProviderFlag, objectHorizontalPosition, objectVerticalPosition, foregroundPixelCode, backgroundPixelCode);
}
// --- cSubtitleObjectRefPgs - PGS variant of cSubtitleObjectRef -------------
class cSubtitleObjectRefPgs : public cSubtitleObjectRef {
private:
int windowId;
int compositionFlag;
int cropX;
int cropY;
int cropW;
int cropH;
public:
cSubtitleObjectRefPgs(cBitStream &bs);
};
cSubtitleObjectRefPgs::cSubtitleObjectRefPgs(cBitStream &bs)
:cSubtitleObjectRef()
{
objectId = bs.GetBits(16);
windowId = bs.GetBits(8);
compositionFlag = bs.GetBits(8);
bs.SkipBits(32); // skip absolute position, object is aligned to region
if ((compositionFlag & 0x80) != 0) {
cropX = bs.GetBits(16);
cropY = bs.GetBits(16);
cropW = bs.GetBits(16);
cropH = bs.GetBits(16);
}
else
cropX = cropY = cropW = cropH = 0;
dbgregions("<b>objectrefPgs</b> id %d flag %d x %d y %d cropX %d cropY %d cropW %d cropH %d<br>\n", objectId, compositionFlag, objectHorizontalPosition, objectVerticalPosition, cropX, cropY, cropW, cropH);
}
// --- cSubtitleRegion -------------------------------------------------------
class cSubtitleRegion : public cListObject {
private:
int regionId;
int regionVersionNumber;
bool regionFillFlag;
int regionWidth;
int regionHeight;
int regionLevelOfCompatibility;
int regionDepth;
int clutId;
int region8bitPixelCode;
int region4bitPixelCode;
int region2bitPixelCode;
cList<cSubtitleObjectRef> objectRefs;
public:
cSubtitleRegion(int RegionId);
void Parse(cBitStream &bs);
void ParsePgs(cBitStream &bs);
void SetDimensions(int Width, int Height);
int RegionId(void) { return regionId; }
int RegionVersionNumber(void) { return regionVersionNumber; }
bool RegionFillFlag(void) { return regionFillFlag; }
int RegionWidth(void) { return regionWidth; }
int RegionHeight(void) { return regionHeight; }
int RegionLevelOfCompatibility(void) { return regionLevelOfCompatibility; }
int RegionDepth(void) { return regionDepth; }
int ClutId(void) { return clutId; }
void Render(cBitmap *Bitmap, cSubtitleObjects *Objects);
};
cSubtitleRegion::cSubtitleRegion(int RegionId)
{
regionId = RegionId;
regionVersionNumber = -1;
regionFillFlag = false;
regionWidth = 0;
regionHeight = 0;
regionLevelOfCompatibility = 0;
regionDepth = 0;
clutId = -1;
region8bitPixelCode = 0;
region4bitPixelCode = 0;
region2bitPixelCode = 0;
}
void cSubtitleRegion::Parse(cBitStream &bs)
{
int Version = bs.GetBits(4);
#ifndef FIX_SUBTITLE_VERSION_BROADCASTER_STUPIDITY
if (regionVersionNumber == Version)
return; // no update
#endif
regionVersionNumber = Version;
regionFillFlag = bs.GetBit();
bs.SkipBits(3); // reserved
regionWidth = bs.GetBits(16);
regionHeight = bs.GetBits(16);
regionLevelOfCompatibility = 1 << bs.GetBits(3); // stored as "number of bits per pixel"
regionDepth = 1 << bs.GetBits(3); // stored as "number of bits per pixel"
bs.SkipBits(2); // reserved
clutId = bs.GetBits(8);
region8bitPixelCode = bs.GetBits(8);
region4bitPixelCode = bs.GetBits(4);
region2bitPixelCode = bs.GetBits(2);
bs.SkipBits(2); // reserved
dbgregions("<b>region</b> id %d version %d fill %d width %d height %d level %d depth %d clutId %d<br>\n", regionId, regionVersionNumber, regionFillFlag, regionWidth, regionHeight, regionLevelOfCompatibility, regionDepth, clutId);
// no objectRefs.Clear() here!
while (!bs.IsEOF())
objectRefs.Add(new cSubtitleObjectRef(bs));
}
void cSubtitleRegion::ParsePgs(cBitStream &bs)
{
regionDepth = 8;
bs.SkipBits(8); // skip palette update flag
clutId = bs.GetBits(8);
dbgregions("<b>region</b> id %d version %d clutId %d<br>\n", regionId, regionVersionNumber, clutId);
int objects = bs.GetBits(8);
while (objects--)
objectRefs.Add(new cSubtitleObjectRefPgs(bs));
}
void cSubtitleRegion::SetDimensions(int Width, int Height)
{
regionWidth = Width;
regionHeight = Height;
dbgregions("<b>region</b> id %d width %d height %d<br>\n", regionId, regionWidth, regionHeight);
}
void cSubtitleRegion::Render(cBitmap *Bitmap, cSubtitleObjects *Objects)
{
if (regionFillFlag) {
switch (Bitmap->Bpp()) {
case 2: Bitmap->Fill(region2bitPixelCode); break;
case 4: Bitmap->Fill(region4bitPixelCode); break;
case 8: Bitmap->Fill(region8bitPixelCode); break;
default: dbgregions("unknown bpp %d (%s %d)<br>\n", Bitmap->Bpp(), __FUNCTION__, __LINE__);
}
}
for (cSubtitleObjectRef *sor = objectRefs.First(); sor; sor = objectRefs.Next(sor)) {
if (cSubtitleObject *so = Objects->GetObjectById(sor->ObjectId())) {
so->Render(Bitmap, sor->ObjectHorizontalPosition(), sor->ObjectVerticalPosition(), sor->ForegroundPixelCode(), sor->BackgroundPixelCode());
}
}
}
// --- cSubtitleRegionRef ----------------------------------------------------
class cSubtitleRegionRef : public cListObject {
private:
int regionId;
int regionHorizontalAddress;
int regionVerticalAddress;
public:
cSubtitleRegionRef(int id, int x, int y);
cSubtitleRegionRef(cBitStream &bs);
int RegionId(void) { return regionId; }
int RegionHorizontalAddress(void) { return regionHorizontalAddress; }
int RegionVerticalAddress(void) { return regionVerticalAddress; }
};
cSubtitleRegionRef::cSubtitleRegionRef(int id, int x, int y)
{
regionId = id;
regionHorizontalAddress = x;
regionVerticalAddress = y;
dbgpages("<b>regionref</b> id %d tx %d y %d<br>\n", regionId, regionHorizontalAddress, regionVerticalAddress);
}
cSubtitleRegionRef::cSubtitleRegionRef(cBitStream &bs)
{
regionId = bs.GetBits(8);
bs.SkipBits(8); // reserved
regionHorizontalAddress = bs.GetBits(16);
regionVerticalAddress = bs.GetBits(16);
dbgpages("<b>regionref</b> id %d tx %d y %d<br>\n", regionId, regionHorizontalAddress, regionVerticalAddress);
}
// --- cDvbSubtitlePage ------------------------------------------------------
class cDvbSubtitlePage : public cListObject {
private:
int pageId;
int pageTimeout;
int pageVersionNumber;
int pageState;
int64_t pts;
bool pending;
cSubtitleObjects objects;
cList<cSubtitleClut> cluts;
cList<cSubtitleRegion> regions;
cList<cSubtitleRegionRef> regionRefs;
public:
cDvbSubtitlePage(int PageId);
void Parse(int64_t Pts, cBitStream &bs);
void ParsePgs(int64_t Pts, cBitStream &bs);
int PageId(void) { return pageId; }
int PageTimeout(void) { return pageTimeout; }
int PageVersionNumber(void) { return pageVersionNumber; }
int PageState(void) { return pageState; }
int64_t Pts(void) const { return pts; }
bool Pending(void) { return pending; }
cSubtitleObjects *Objects(void) { return &objects; }
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);
cSubtitleRegionRef *GetRegionRefByIndex(int RegionRefIndex) { return regionRefs.Get(RegionRefIndex); }
void AddRegionRef(cSubtitleRegionRef *rf) { regionRefs.Add(rf); }
void SetPending(bool Pending) { pending = Pending; }
};
cDvbSubtitlePage::cDvbSubtitlePage(int PageId)
{
pageId = PageId;
pageTimeout = 0;
pageVersionNumber = -1;
pageState = -1;
pts = -1;
pending = false;
}
void cDvbSubtitlePage::Parse(int64_t Pts, cBitStream &bs)
{
if (Pts >= 0)
pts = Pts;
pageTimeout = bs.GetBits(8);
int Version = bs.GetBits(4);
#ifndef FIX_SUBTITLE_VERSION_BROADCASTER_STUPIDITY
if (pageVersionNumber == Version)
return; // no update
#endif
pageVersionNumber = Version;
pageState = bs.GetBits(2);
switch (pageState) {
case 0: // normal case - page update
break;
case 1: // acquisition point - page refresh
regions.Clear();
objects.Clear();
break;
case 2: // mode change - new page
regions.Clear();
cluts.Clear();
objects.Clear();
break;
case 3: // reserved
break;
default: dbgpages("unknown page state: %d<br>\n", pageState);
}
bs.SkipBits(2); // reserved
dbgpages("<hr>\n<b>page</b> id %d version %d pts %" PRId64 " timeout %d state %d<br>\n", pageId, pageVersionNumber, pts, pageTimeout, pageState);
regionRefs.Clear();
while (!bs.IsEOF())
regionRefs.Add(new cSubtitleRegionRef(bs));
pending = true;
}
void cDvbSubtitlePage::ParsePgs(int64_t Pts, cBitStream &bs)
{
if (Pts >= 0)
pts = Pts;
pageTimeout = 60000;
int Version = bs.GetBits(16);
if (pageVersionNumber == Version)
return;
pageVersionNumber = Version;
pageState = bs.GetBits(2);
switch (pageState) {
case 0: // normal case - page update
regions.Clear();
break;
case 1: // acquisition point - page refresh
case 2: // epoch start - new page
case 3: // epoch continue - new page
regions.Clear();
cluts.Clear();
objects.Clear();
break;
default: dbgpages("unknown page state: %d<br>\n", pageState);
}
bs.SkipBits(6);
dbgpages("<hr>\n<b>page</b> id %d version %d pts %" PRId64 " timeout %d state %d<br>\n", pageId, pageVersionNumber, pts, pageTimeout, pageState);
regionRefs.Clear();
pending = true;
}
tArea *cDvbSubtitlePage::GetAreas(int &NumAreas)
{
if (regions.Count() > 0) {
NumAreas = regionRefs.Count();
tArea *Areas = new tArea[NumAreas];
tArea *a = Areas;
for (cSubtitleRegionRef *srr = regionRefs.First(); srr; srr = regionRefs.Next(srr)) {
if (cSubtitleRegion *sr = GetRegionById(srr->RegionId())) {
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();
}
else
a->x1 = a->y1 = a->x2 = a->y2 = a->bpp = 0;
a++;
}
return Areas;
}
NumAreas = 0;
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)) {
if (sc->ClutId() == ClutId)
return sc;
}
if (!New)
return NULL;
cSubtitleClut *Clut = new cSubtitleClut(ClutId);
cluts.Add(Clut);
return Clut;
}
cSubtitleRegion *cDvbSubtitlePage::GetRegionById(int RegionId, bool New)
{
for (cSubtitleRegion *sr = regions.First(); sr; sr = regions.Next(sr)) {
if (sr->RegionId() == RegionId)
return sr;
}
if (!New)
return NULL;
cSubtitleRegion *Region = new cSubtitleRegion(RegionId);
regions.Add(Region);
return Region;
}
cSubtitleObject *cDvbSubtitlePage::GetObjectById(int ObjectId, bool New)
{
return objects.GetObjectById(ObjectId, New);
}
// --- 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:
int state;
int64_t pts;
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, tArea &AreaCombined, tArea &AreaOsd);
~cDvbSubtitleBitmaps();
int State(void) { return state; }
int64_t Pts(void) { return pts; }
int Timeout(void) { return timeout; }
void AddBitmap(cBitmap *Bitmap);
bool HasBitmaps(void) { return bitmaps.Size(); }
void Draw(cOsd *Osd);
void DbgDump(int WindowWidth, int WindowHeight);
};
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;
}
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 = Setup.AntiAlias;
if (Scale && osdFactorX > 1.0 || osdFactorY > 1.0) {
// Upscaling requires 8bpp:
int Bpp = areaOsd.bpp;
areaOsd.bpp = 8;
if (Osd->CanHandleAreas(&areaOsd, 1) != oeOk) {
areaOsd.bpp = Bpp;
AntiAlias = false;
}
}
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];
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();
}
}
void cDvbSubtitleBitmaps::DbgDump(int WindowWidth, int WindowHeight)
{
if (!SD.Active())
return;
SD.SetFirstPts(Pts());
double STC = double(cDevice::PrimaryDevice()->GetSTC() - SD.FirstPts()) / 90000;
double Start = double(Pts() - SD.FirstPts()) / 90000;
double Duration = Timeout();
double End = Start + Duration;
cBitmap Bitmap(WindowWidth, WindowHeight, 8);
#define DBGBACKGROUND 0xA0A0A0
Bitmap.DrawRectangle(0, 0, WindowWidth - 1, WindowHeight - 1, DBGBACKGROUND);
for (int i = 0; i < bitmaps.Size(); i++) {
cBitmap *b = bitmaps[i];
Bitmap.DrawBitmap(b->X0(), b->Y0(), *b);
}
cString ImgName = SD.WriteJpeg(&Bitmap);
#define BORDER //" border=1"
SD.WriteHtml("<p>%s<br>", State() == 0 ? "page update" : State() == 1 ? "page refresh" : State() == 2 ? "new page" : "???");
SD.WriteHtml("<table" BORDER "><tr><td>");
SD.WriteHtml("%.2f", STC);
SD.WriteHtml("</td><td>");
SD.WriteHtml("<img src=\"%s\">", *ImgName);
SD.WriteHtml("</td><td style=\"height:100%%\"><table" BORDER " style=\"height:100%%\">");
SD.WriteHtml("<tr><td valign=top><b>%.2f</b></td></tr>", Start);
SD.WriteHtml("<tr><td valign=middle>%.2f</td></tr>", Duration);
SD.WriteHtml("<tr><td valign=bottom>%.2f</td></tr>", End);
SD.WriteHtml("</table></td>");
SD.WriteHtml("</tr></table>\n");
}
// --- cDvbSubtitleConverter -------------------------------------------------
int cDvbSubtitleConverter::setupLevel = 0;
cDvbSubtitleConverter::cDvbSubtitleConverter(void)
:cThread("subtitle converter")
{
dvbSubtitleAssembler = new cDvbSubtitleAssembler;
osd = NULL;
frozen = false;
ddsVersionNumber = -1;
displayWidth = windowWidth = 720;
displayHeight = windowHeight = 576;
windowHorizontalOffset = 0;
windowVerticalOffset = 0;
pages = new cList<cDvbSubtitlePage>;
bitmaps = new cList<cDvbSubtitleBitmaps>;
SD.Reset();
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 -----------------------<br>\n");
dvbSubtitleAssembler->Reset();
Lock();
pages->Clear();
bitmaps->Clear();
DELETENULL(osd);
frozen = false;
ddsVersionNumber = -1;
displayWidth = windowWidth = 720;
displayHeight = windowHeight = 576;
windowHorizontalOffset = 0;
windowVerticalOffset = 0;
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) : -1;
if (pts >= 0)
dbgconverter("converter PTS: %" PRId64 "<br>\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 = PesHasPts(Data) ? PesGetPts(Data) : -1;
if (pts >= 0)
dbgconverter("converter PTS: %" PRId64 "<br>\n", pts);
const uchar *data = Data + PayloadOffset;
int length = Length - PayloadOffset;
if (length > 0) {
if (length > 2 && data[0] == 0x20 && data[1] == 0x00 && data[2] == 0x0F) {
data += 2;
length -= 2;
}
const uchar *b = data;
while (length > 0) {
if (b[0] == STUFFING_SEGMENT)
break;
int n;
if (b[0] == 0x0F)
n = ExtractSegment(b, length, pts);
else
n = ExtractPgsSegment(b, length, pts);
if (n < 0)
break;
b += n;
length -= n;
}
}
}
return Length;
}
return 0;
}
#define LimitTo32Bit(n) ((n) & 0x00000000FFFFFFFFL)
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) {
dbgoutput("closing osd<br>\n");
DELETENULL(osd);
}
LastSetupLevel = NewSetupLevel;
}
for (cDvbSubtitleBitmaps *sb = bitmaps->First(); sb; sb = bitmaps->Next(sb)) {
// Calculate the Delta between the STC (the current timestamp of the video)
// and the bitmap's PTS (the timestamp when the bitmap shall be presented).
// A negative Delta means that the bitmap will be presented in the future:
int64_t STC = cDevice::PrimaryDevice()->GetSTC();
int64_t Delta = LimitTo32Bit(STC) - LimitTo32Bit(sb->Pts()); // 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 >= 0) { // found a bitmap that shall be displayed...
if (Delta < sb->Timeout() * 1000) { // ...and has not timed out yet
if (!sb->HasBitmaps()) {
Timeout.Set();
WaitMs = 0;
}
else if (AssertOsd()) {
dbgoutput("showing bitmap #%d of %d<br>\n", sb->Index() + 1, bitmaps->Count());
sb->Draw(osd);
Timeout.Set(sb->Timeout() * 1000);
dbgconverter("PTS: %" PRId64 " STC: %" PRId64 " (%" PRId64 ") timeout: %d<br>\n", sb->Pts(), STC, Delta, sb->Timeout());
}
}
else
WaitMs = 0; // bitmap already timed out, so try next one immediately
dbgoutput("deleting bitmap #%d of %d<br>\n", sb->Index() + 1, bitmaps->Count());
bitmaps->Del(sb);
break;
}
}
}
cCondWait::SleepMs(WaitMs);
}
}
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) {
osdFactorX = osdFactorY = 1.0;
osdDeltaX = osdDeltaY = 0;
}
else {
osdFactorX = osdFactorY = min(double(OsdWidth) / displayWidth, double(OsdHeight) / displayHeight);
osdDeltaX = (OsdWidth - displayWidth * osdFactorX) / 2;
osdDeltaY = (OsdHeight - displayHeight * osdFactorY) / 2;
}
}
bool cDvbSubtitleConverter::AssertOsd(void)
{
LOCK_THREAD;
if (!osd) {
SetOsdData();
osd = cOsdProvider::NewOsd(int(round(osdFactorX * windowHorizontalOffset + osdDeltaX)), int(round(osdFactorY * windowVerticalOffset + osdDeltaY)) + Setup.SubtitleOffset, OSD_LEVEL_SUBTITLES);
}
return osd != NULL;
}
cDvbSubtitlePage *cDvbSubtitleConverter::GetPageById(int PageId, bool New)
{
for (cDvbSubtitlePage *sp = pages->First(); sp; sp = pages->Next(sp)) {
if (sp->PageId() == PageId)
return sp;
}
if (!New)
return NULL;
cDvbSubtitlePage *Page = new cDvbSubtitlePage(PageId);
pages->Add(Page);
return Page;
}
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;
LOCK_THREAD;
cDvbSubtitlePage *page = GetPageById(bs.GetBits(16), true);
int segmentLength = bs.GetBits(16);
if (!bs.SetLength(bs.Index() + segmentLength * 8))
return -1;
switch (segmentType) {
case PAGE_COMPOSITION_SEGMENT: {
if (page->Pending()) {
dbgsegments("END_OF_DISPLAY_SET_SEGMENT (simulated)<br>\n");
FinishPage(page);
}
dbgsegments("PAGE_COMPOSITION_SEGMENT<br>\n");
page->Parse(Pts, bs);
SD.SetFactor(double(DBGBITMAPWIDTH) / windowWidth);
break;
}
case REGION_COMPOSITION_SEGMENT: {
dbgsegments("REGION_COMPOSITION_SEGMENT<br>\n");
cSubtitleRegion *region = page->GetRegionById(bs.GetBits(8), true);
region->Parse(bs);
break;
}
case CLUT_DEFINITION_SEGMENT: {
dbgsegments("CLUT_DEFINITION_SEGMENT<br>\n");
cSubtitleClut *clut = page->GetClutById(bs.GetBits(8), true);
clut->Parse(bs);
break;
}
case OBJECT_DATA_SEGMENT: {
dbgsegments("OBJECT_DATA_SEGMENT<br>\n");
cSubtitleObject *object = page->GetObjectById(bs.GetBits(16), true);
object->Parse(bs);
break;
}
case DISPLAY_DEFINITION_SEGMENT: {
dbgsegments("DISPLAY_DEFINITION_SEGMENT<br>\n");
int version = bs.GetBits(4);
#ifndef FIX_SUBTITLE_VERSION_BROADCASTER_STUPIDITY
if (version == ddsVersionNumber)
break; // no update
#endif
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();
ddsVersionNumber = version;
dbgdisplay("<b>display</b> version %d flag %d width %d height %d ofshor %d ofsver %d<br>\n", ddsVersionNumber, displayWindowFlag, windowWidth, windowHeight, windowHorizontalOffset, windowVerticalOffset);
break;
}
case DISPARITY_SIGNALING_SEGMENT: {
dbgsegments("DISPARITY_SIGNALING_SEGMENT<br>\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<br>\n");
FinishPage(page);
page->SetPending(false);
break;
}
default:
dbgsegments("*** unknown segment type: %02X<br>\n", segmentType);
}
return bs.Length() / 8;
}
return -1;
}
int cDvbSubtitleConverter::ExtractPgsSegment(const uchar *Data, int Length, int64_t Pts)
{
cBitStream bs(Data, Length * 8);
if (Length >= 3) {
int segmentType = bs.GetBits(8);
int segmentLength = bs.GetBits(16);
if (!bs.SetLength(bs.Index() + segmentLength * 8))
return -1;
LOCK_THREAD;
cDvbSubtitlePage *page = GetPageById(0, true);
switch (segmentType) {
case PGS_PRESENTATION_SEGMENT: {
if (page->Pending()) {
dbgsegments("PGS_DISPLAY_SEGMENT (simulated)<br>\n");
FinishPage(page);
}
dbgsegments("PGS_PRESENTATION_SEGMENT<br>\n");
displayWidth = windowWidth = bs.GetBits(16);
displayHeight = windowHeight = bs.GetBits(16);
bs.SkipBits(8);
page->ParsePgs(Pts, bs);
SD.SetFactor(double(DBGBITMAPWIDTH) / windowWidth);
cSubtitleRegion *region = page->GetRegionById(0, true);
region->ParsePgs(bs);
break;
}
case PGS_WINDOW_SEGMENT: {
bs.SkipBits(16);
int regionHorizontalAddress = bs.GetBits(16);
int regionVerticalAddress = bs.GetBits(16);
int regionWidth = bs.GetBits(16);
int regionHeight = bs.GetBits(16);
cSubtitleRegion *region = page->GetRegionById(0, true);
region->SetDimensions(regionWidth, regionHeight);
page->AddRegionRef(new cSubtitleRegionRef(0, regionHorizontalAddress, regionVerticalAddress));
dbgsegments("PGS_WINDOW_SEGMENT<br>\n");
break;
}
case PGS_PALETTE_SEGMENT: {
dbgsegments("PGS_PALETTE_SEGMENT<br>\n");
cSubtitleClut *clut = page->GetClutById(bs.GetBits(8), true);
clut->ParsePgs(bs);
break;
}
case PGS_OBJECT_SEGMENT: {
dbgsegments("PGS_OBJECT_SEGMENT<br>\n");
cSubtitleObject *object = page->GetObjectById(bs.GetBits(16), true);
object->ParsePgs(bs);
break;
}
case PGS_DISPLAY_SEGMENT: {
dbgsegments("PGS_DISPLAY_SEGMENT<br>\n");
FinishPage(page);
page->SetPending(false);
break;
}
default:
dbgsegments("*** unknown segment type: %02X<br>\n", segmentType);
return -1;
}
return bs.Length() / 8;
}
return -1;
}
void cDvbSubtitleConverter::FinishPage(cDvbSubtitlePage *Page)
{
if (!AssertOsd())
return;
int NumAreas;
tArea *Areas = Page->GetAreas(NumAreas);
if (!Areas)
return;
tArea AreaCombined = Page->CombineAreas(NumAreas, Areas);
tArea AreaOsd = Page->ScaleArea(AreaCombined, osdFactorX, osdFactorY);
int Bpp = 8;
bool Reduced = false;
if (osd) {
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;
}
else
return; // unable to draw bitmaps
}
}
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)) {
if (cSubtitleRegion *sr = Page->GetRegionById(srr->RegionId())) {
if (cSubtitleClut *clut = Page->GetClutById(sr->ClutId())) {
cBitmap *bm = new cBitmap(sr->RegionWidth(), sr->RegionHeight(), sr->RegionDepth());
bm->Replace(*clut->GetPalette(sr->RegionDepth()));
sr->Render(bm, Page->Objects());
if (Reduced) {
if (sr->RegionDepth() != Areas[i].bpp) {
if (sr->RegionLevelOfCompatibility() <= Areas[i].bpp) {
//TODO this is untested - didn't have any such subtitle stream
cSubtitleClut *Clut = Page->GetClutById(sr->ClutId());
dbgregions("reduce region %d bpp %d level %d area bpp %d<br>\n", sr->RegionId(), sr->RegionDepth(), sr->RegionLevelOfCompatibility(), Areas[i].bpp);
bm->ReduceBpp(*Clut->GetPalette(sr->RegionDepth()));
}
else {
dbgregions("condense region %d bpp %d level %d area bpp %d<br>\n", sr->RegionId(), sr->RegionDepth(), sr->RegionLevelOfCompatibility(), Areas[i].bpp);
bm->ShrinkBpp(Areas[i].bpp);
}
}
}
bm->SetOffset(srr->RegionHorizontalAddress(), srr->RegionVerticalAddress());
Bitmaps->AddBitmap(bm);
}
}
}
}
if (DebugPages)
Bitmaps->DbgDump(windowWidth, windowHeight);
}
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