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vdr/dvbsubtitle.c
Klaus Schmidinger 2db7397542 Version 2.1.7 
VDR developer version 2.1.7 is now available at

       ftp://ftp.tvdr.de/vdr/Developer/vdr-2.1.7.tar.bz2

A 'diff' against the previous version is available at

       ftp://ftp.tvdr.de/vdr/Developer/vdr-2.1.6-2.1.7.diff

MD5 checksums:

1c954bad31ce74cd1cbd7987e62d2a98  vdr-2.1.7.tar.bz2
88a90327a75833b7723942d3bd25f954  vdr-2.1.6-2.1.7.diff

WARNING:
========

This is a *developer* version. Even though *I* use it in my productive
environment, I strongly recommend that you only use it under controlled
conditions and for testing and debugging.

From the HISTORY file:
- No longer logging an error message in DirSizeMB() if the given directory doesn't
  exist. This avoids lots of log entries in case several VDRs use the same video
  directory and one of them has already physically removed a recording directory,
  while the others still have it in their list of deleted recordings.
- Updated the Italian OSD texts (thanks to Diego Pierotto).
- A cCamSlot that has WantsTsData set to true in its constructor now also gets
  the CAT and EMM PIDs data.
- Fixed a possible division by zero in frame rate detection.
- VDR now reads command line options from *.conf files in /etc/vdr/conf.d (thanks
  to Lars Hanisch). See vdr.1 and vdr.5 for details.
- Fixed a possible crash in the LCARS skin (thanks to Thomas Reufer).
- Updated the dvbhddevice plugin source.
- Fixed a bug in the Makefile when installing plugins with LCLBLD=1 (thanks to
  Stefan Huelswitt).
- The pid of the PMT in which the CA descriptors of a given channel are broadcast
  is now stored together with the CA descriptors and can be retrieved by calling
  GetPmtPid() (this information is only required to receive encrypted channels
  with the OctopusNet receiver via the 'satip' plugin).
- Channels that are not listed in the SDT are now only marked as OBSOLETE if
  "Setup/DVB/Update channels" is set to a value other than "no" or "PIDs only".
- Fixed multiple OBSOLETE marks in channels that are not listed in the SDT in case
  "Setup/Miscellaneous/Show channel names with source" is set to "yes".
- The new function cOsd::DrawScaledBitmap() is now used for drawing subtitles.
  This function can be reimplemented by high level OSDs which may be able to do
  the scaling in hardware or otherwise more efficiently (thanks to Thomas Reufer).
- Fixed detaching receivers from devices in case a CAM needs to receive the TS
  (reported by Dietmar Spingler).
- Fixed resetting the receiver for EMM pids for CAMs that need to receive the TS
  (reported by Dietmar Spingler).
- Fixed (well, actually worked around) a problem with subtitles not being displayed
  because the broadcaster doesn't set the data's version numbers as required by the
  DVB standard (thanks to Rolf Ahrenberg).
- Fixed support for systemd (thanks to Christopher Reimer).
- Added a missing backslash to the help text of the SVDRP command MOVR (thanks to
  Lars Hanisch).
- Added subsystem id support for DVB devices connected via USB (thanks to Jose
  Alberto Reguero).
- Added the functions IndexOf(), InsertUnique(), AppendUnique() and RemoveElement()
  to the cVector class (thanks to Stefan Schallenberg).
- Fixed a possible out-of-bounds access in cVector::Remove().
- Added functions to set and retrieve the priority of a cReceiver (suggested by
  Frank Schmirler).
- Added the new parameters "Setup/Miscellaneous/Volume steps" and
  ".../Volume linearize" (thanks to Claus Muus). See the MANUAL for details.
- Fixed jumping to an absolute position via the Red key in case replay was paused
  (reported by Dieter Ferdinand).
- Changed the German weekday names from "MonDieMitDonFreSamSon" to
  "Mo.Di.Mi.Do.Fr.Sa.So." (thanks to Stefan Blochberger).
- Now handling CAT sections that consist of more than one TS packet.
- Added handling for DTS audio tracks to cPatPmtParser::ParsePmt() (thanks to
  Thomas Reufer).
- Added support for PGS subtitles (thanks to Thomas Reufer).
- Use of the function cOsd::GetBitmap() outside of derived classes is now deprecated,
  and it may be made 'protected' in a future version, since it doesn't work with
  TrueColor OSDs. Plugin authors may want to modify their code so that it
  works without this function.
- Modified the descriptions of several threads, so that the important information
  (like device or frontend numbers) is within the first 15 characters of the
  string, because only these are displayed in thread listings. Plugin authors may
  want to do the same.
- Added the channel name to log messages that reference a channel (suggested by
  Dietmar Spingler).
- Modified the CAM API so that it is possible to implement CAMs that can be freely
  assigned to any devices (thanks to Jasmin Jessich).
- Plugins can now implement the function SetMenuSortMode() in their skin objects
  derived from cSkinDisplayMenu, to get informed about the currently used sort
  mode, if applicable (suggested by Martin Schirrmacher).
- Added cOsdProvider::OsdSizeChanged(), which plugins that implement an output device
  can call to signal a change in the OSD that requires a redraw of the currently
  displayed object (thanks to Thomas Reufer).
- Added a comment to cRecorder::Activate() about the need to call Detach() in the
  destructor (suggested by Eike Sauer).
- Now returning from removing deleted recordings after at most 10 seconds, or if the
  user presses a remote control key, to keep the system from getting unresponsive
  when removing a huge number of files (reported by Dieter Ferdinand).
- Fixed generating the index file of an existing recording in case at the of a TS file
  there is less data in the buffer than needed by the frame detector. In such a case
  it was possible that frames were missed, and there was most likely a distortion
  when replaying that part of a recording. This is mostly a problem for recordings that
  consist of more than one *.ts file. Single file recordings could only lose some
  frames at their very end, which probably doesn't matter. At any rate, if you have
  generated an index file with VDR version 2.0.6, 2.1.5 or 2.1.6, you may want to
  do so again with this version to make sure the index is OK.
- Added the new command line option --updindex, which can be used to update an
  incomplete index of a recording (based on a patch from Helmut Auer).
2015-01-18 14:45:41 +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 Schluessler <marco@lordzodiac.de>
* With some input from the "subtitles plugin" by Pekka Virtanen <pekka.virtanen@sci.fi>
*
* $Id: dvbsubtitle.c 3.9 2015/01/14 11:31:09 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;
bool singleByte;
const uchar *from = (uchar *)txt;
int len = NumberOfCodes;
const char *CharacterTable = SI::getCharacterTable(from, len, &singleByte);
dbgobjects(" table %s single %d raw '%s'", CharacterTable, singleByte, 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, 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, double FactorX, double FactorY)
{
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 = int(round(FactorX * srr->RegionHorizontalAddress()));
a->y1 = int(round(FactorY * srr->RegionVerticalAddress()));
a->x2 = int(round(FactorX * (srr->RegionHorizontalAddress() + sr->RegionWidth() - 1)));
a->y2 = int(round(FactorY * (srr->RegionVerticalAddress() + sr->RegionHeight() - 1)));
a->bpp = sr->RegionDepth();
while ((a->Width() & 3) != 0)
a->x2++; // aligns width to a multiple of 4, so 2, 4 and 8 bpp will work
}
else
a->x1 = a->y1 = a->x2 = a->y2 = a->bpp = 0;
a++;
}
return Areas;
}
NumAreas = 0;
return NULL;
}
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;
double osdFactorX;
double osdFactorY;
cVector<cBitmap *> bitmaps;
public:
cDvbSubtitleBitmaps(int State, int64_t Pts, int Timeout, tArea *Areas, int NumAreas, double OsdFactorX, double OsdFactorY);
~cDvbSubtitleBitmaps();
int State(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)
{
state = State;
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++)
areas[i].bpp = Bpp[i];
AntiAlias = false;
}
}
if (State() == 0 || Osd->SetAreas(areas, numAreas) == oeOk) {
for (int i = 0; i < bitmaps.Size(); i++) {
cBitmap *b = bitmaps[i];
Osd->DrawScaledBitmap(int(round(b->X0() * osdFactorX)), int(round(b->Y0() * osdFactorY)), *b, 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 = VideoAspect * OsdHeight / displayWidth;
osdFactorY = 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, osdFactorX, osdFactorY);
int Bpp = 8;
bool Reduced = false;
while (osd && osd->CanHandleAreas(Areas, NumAreas) != oeOk) {
dbgoutput("CanHandleAreas: %d<br>\n", osd->CanHandleAreas(Areas, NumAreas));
int HalfBpp = Bpp / 2;
if (HalfBpp >= 2) {
for (int i = 0; i < NumAreas; i++) {
if (Areas[i].bpp >= Bpp) {
Areas[i].bpp = HalfBpp;
Reduced = true;
}
}
Bpp = HalfBpp;
}
else
return; // unable to draw bitmaps
}
cDvbSubtitleBitmaps *Bitmaps = new cDvbSubtitleBitmaps(Page->PageState(), Page->Pts(), Page->PageTimeout(), Areas, NumAreas, osdFactorX, osdFactorY);
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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