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Diffstat (limited to 'dvbsubtitle.c')
| -rw-r--r-- | dvbsubtitle.c | 1029 |
1 files changed, 1029 insertions, 0 deletions
diff --git a/dvbsubtitle.c b/dvbsubtitle.c new file mode 100644 index 0000000..1f7e6b7 --- /dev/null +++ b/dvbsubtitle.c @@ -0,0 +1,1029 @@ +/* + * dvbsubtitle.c: DVB subtitles + * + * See the main source file 'vdr.c' for copyright information and + * how to reach the author. + * + * Original author: Marco Schlüßler <marco@lordzodiac.de> + * With some input from the "subtitle plugin" by Pekka Virtanen <pekka.virtanen@sci.fi> + * + * $Id: dvbsubtitle.c 1.1 2007/10/14 14:02:35 kls Exp $ + */ + +#include "dvbsubtitle.h" +#include "device.h" + +#define PAGE_COMPOSITION_SEGMENT 0x10 +#define REGION_COMPOSITION_SEGMENT 0x11 +#define CLUT_DEFINITION_SEGMENT 0x12 +#define OBJECT_DATA_SEGMENT 0x13 +#define END_OF_DISPLAY_SET_SEGMENT 0x80 + +// Set these to 'true' for debug output: +static bool DebugConverter = false; +static bool DebugSegments = false; +static bool DebugPages = false; +static bool DebugRegions = false; +static bool DebugObjects = false; +static bool DebugCluts = false; + +#define dbgconverter(a...) if (DebugConverter) fprintf(stderr, a) +#define dbgsegments(a...) if (DebugSegments) fprintf(stderr, a) +#define dbgpages(a...) if (DebugPages) fprintf(stderr, a) +#define dbgregions(a...) if (DebugRegions) fprintf(stderr, a) +#define dbgobjects(a...) if (DebugObjects) fprintf(stderr, a) +#define dbgcluts(a...) if (DebugCluts) fprintf(stderr, a) + +// --- cSubtitleClut --------------------------------------------------------- + +class cSubtitleClut : public cListObject { +private: + int clutId; + int version; + cPalette palette2; + cPalette palette4; + cPalette palette8; +public: + cSubtitleClut(int ClutId); + int ClutId(void) { return clutId; } + int Version(void) { return version; } + void SetVersion(int Version) { version = Version; } + void SetColor(int Bpp, int Index, tColor Color); + const cPalette *GetPalette(int Bpp); + }; + +cSubtitleClut::cSubtitleClut(int ClutId) +:palette2(2) +,palette4(4) +,palette8(8) +{ + clutId = ClutId; + version = -1; +} + +void cSubtitleClut::SetColor(int Bpp, int Index, tColor Color) +{ + switch (Bpp) { + case 2: palette2.SetColor(Index, Color); break; + case 4: palette4.SetColor(Index, Color); break; + case 8: palette8.SetColor(Index, Color); break; + default: esyslog("ERROR: wrong Bpp in cSubtitleClut::SetColor(%d, %d, %08X)", Bpp, Index, Color); + } +} + +const cPalette *cSubtitleClut::GetPalette(int Bpp) +{ + switch (Bpp) { + case 2: return &palette2; + case 4: return &palette4; + case 8: return &palette8; + default: esyslog("ERROR: wrong Bpp in cSubtitleClut::GetPalette(%d)", Bpp); + } + return &palette8; +} + +// --- cSubtitleObject ------------------------------------------------------- + +class cSubtitleObject : public cListObject { +private: + int objectId; + int version; + int codingMethod; + bool nonModifyingColorFlag; + int nibblePos; + uchar backgroundColor; + uchar foregroundColor; + int providerFlag; + int px; + int py; + cBitmap *bitmap; + void DrawLine(int x, int y, tIndex Index, int Length); + uchar Get2Bits(const uchar *Data, int &Index); + uchar Get4Bits(const uchar *Data, int &Index); + bool Decode2BppCodeString(const uchar *Data, int &Index, int&x, int y); + bool Decode4BppCodeString(const uchar *Data, int &Index, int&x, int y); + bool Decode8BppCodeString(const uchar *Data, int &Index, int&y, int y); +public: + cSubtitleObject(int ObjectId, cBitmap *Bitmap); + int ObjectId(void) { return objectId; } + int Version(void) { return version; } + int CodingMethod(void) { return codingMethod; } + bool NonModifyingColorFlag(void) { return nonModifyingColorFlag; } + void DecodeSubBlock(const uchar *Data, int Length, bool Even); + void SetVersion(int Version) { version = Version; } + void SetBackgroundColor(uchar BackgroundColor) { backgroundColor = BackgroundColor; } + void SetForegroundColor(uchar ForegroundColor) { foregroundColor = ForegroundColor; } + void SetNonModifyingColorFlag(bool NonModifyingColorFlag) { nonModifyingColorFlag = NonModifyingColorFlag; } + void SetCodingMethod(int CodingMethod) { codingMethod = CodingMethod; } + void SetPosition(int x, int y) { px = x; py = y; } + void SetProviderFlag(int ProviderFlag) { providerFlag = ProviderFlag; } + }; + +cSubtitleObject::cSubtitleObject(int ObjectId, cBitmap *Bitmap) +{ + objectId = ObjectId; + version = -1; + codingMethod = -1; + nonModifyingColorFlag = false; + nibblePos = 0; + backgroundColor = 0; + foregroundColor = 0; + providerFlag = -1; + px = py = 0; + bitmap = Bitmap; +} + +void cSubtitleObject::DecodeSubBlock(const uchar *Data, int Length, bool Even) +{ + int x = 0; + int y = Even ? 0 : 1; + for (int index = 0; index < Length; ) { + switch (Data[index++]) { + case 0x10: { + nibblePos = 8; + while (Decode2BppCodeString(Data, index, x, y) && index < Length) + ; + if (!nibblePos) + index++; + break; + } + case 0x11: { + nibblePos = 4; + while (Decode4BppCodeString(Data, index, x, y) && index < Length) + ; + if (!nibblePos) + index++; + break; + } + case 0x12: + while (Decode8BppCodeString(Data, index, x, y) && index < Length) + ; + break; + case 0x20: //TODO + dbgobjects("sub block 2 to 4 map"); + index += 4; + break; + case 0x21: //TODO + dbgobjects("sub block 2 to 8 map"); + index += 4; + break; + case 0x22: //TODO + dbgobjects("sub block 4 to 8 map"); + index += 16; + break; + case 0xF0: + x = 0; + y += 2; + break; + } + } +} + +void cSubtitleObject::DrawLine(int x, int y, tIndex Index, int Length) +{ + if (nonModifyingColorFlag && Index == 1) + return; + x += px; + y += py; + for (int pos = x; pos < x + Length; pos++) + bitmap->SetIndex(pos, y, Index); +} + +uchar cSubtitleObject::Get2Bits(const uchar *Data, int &Index) +{ + uchar result = Data[Index]; + if (!nibblePos) { + Index++; + nibblePos = 8; + } + nibblePos -= 2; + return (result >> nibblePos) & 0x03; +} + +uchar cSubtitleObject::Get4Bits(const uchar *Data, int &Index) +{ + uchar result = Data[Index]; + if (!nibblePos) { + Index++; + nibblePos = 4; + } + else { + result >>= 4; + nibblePos -= 4; + } + return result & 0x0F; +} + +bool cSubtitleObject::Decode2BppCodeString(const uchar *Data, int &Index, int &x, int y) +{ + int rl = 0; + int color = 0; + uchar code = Get2Bits(Data, Index); + if (code) { + color = code; + rl = 1; + } + else { + code = Get2Bits(Data, Index); + if (code & 2) { // switch_1 + rl = ((code & 1) << 2) + Get2Bits(Data, Index) + 3; + color = Get2Bits(Data, Index); + } + else if (code & 1) + rl = 1; //color 0 + else { + code = Get2Bits(Data, Index); + switch (code & 0x3) { //switch_3 + case 0: + return false; + case 1: + rl = 2; //color 0 + break; + case 2: + rl = (Get2Bits(Data, Index) << 2) + Get2Bits(Data, Index) + 12; + color = Get2Bits(Data, Index); + break; + case 3: + rl = (Get2Bits(Data, Index) << 6) + (Get2Bits(Data, Index) << 4) + (Get2Bits(Data, Index) << 2) + Get2Bits(Data, Index) + 29; + color = Get2Bits(Data, Index); + break; + } + } + } + DrawLine(x, y, color, rl); + x += rl; + return true; +} + +bool cSubtitleObject::Decode4BppCodeString(const uchar *Data, int &Index, int &x, int y) +{ + int rl = 0; + int color = 0; + uchar code = Get4Bits(Data, Index); + if (code) { + color = code; + rl = 1; + } + else { + code = Get4Bits(Data, Index); + if (code & 8) { // switch_1 + if (code & 4) { //switch_2 + switch (code & 3) { //switch_3 + case 0: // color 0 + rl = 1; + break; + case 1: // color 0 + rl = 2; + break; + case 2: + rl = Get4Bits(Data, Index) + 9; + color = Get4Bits(Data, Index); + break; + case 3: + rl = (Get4Bits(Data, Index) << 4) + Get4Bits(Data, Index) + 25; + color = Get4Bits(Data, Index); + break; + } + } + else { + rl = (code & 3) + 4; + color = Get4Bits(Data, Index); + } + } + else { // color 0 + if (!code) + return false; + rl = code + 2; + } + } + DrawLine(x, y, color, rl); + x += rl; + return true; +} + +bool cSubtitleObject::Decode8BppCodeString(const uchar *Data, int &Index, int &x, int y) +{ + int rl = 0; + int color = 0; + uchar code = Data[Index++]; + if (code) { + color = code; + rl = 1; + } + else { + code = Data[Index++]; + rl = code & 0x63; + if (code & 0x80) + color = Data[Index++]; + else if (!rl) + return false; //else color 0 + } + DrawLine(x, y, color, rl); + x += rl; + return true; +} + +// --- cSubtitleRegion ------------------------------------------------------- + +class cSubtitleRegion : public cListObject, public cBitmap { +private: + int regionId; + int version; + int clutId; + int horizontalAddress; + int verticalAddress; + int level; + cList<cSubtitleObject> objects; +public: + cSubtitleRegion(int RegionId); + int RegionId(void) { return regionId; } + int Version(void) { return version; } + int ClutId(void) { return clutId; } + int Level(void) { return level; } + int Depth(void) { return Bpp(); } + void FillRegion(tIndex Index); + cSubtitleObject *GetObjectById(int ObjectId, bool New = false); + int HorizontalAddress(void) { return horizontalAddress; } + int VerticalAddress(void) { return verticalAddress; } + void SetVersion(int Version) { version = Version; } + void SetClutId(int ClutId) { clutId = ClutId; } + void SetLevel(int Level); + void SetDepth(int Depth); + void SetHorizontalAddress(int HorizontalAddress) { horizontalAddress = HorizontalAddress; } + void SetVerticalAddress(int VerticalAddress) { verticalAddress = VerticalAddress; } + }; + +cSubtitleRegion::cSubtitleRegion(int RegionId) +:cBitmap(1, 1, 4) +{ + regionId = RegionId; + version = -1; + clutId = -1; + horizontalAddress = 0; + verticalAddress = 0; + level = 0; +} + +void cSubtitleRegion::FillRegion(tIndex Index) +{ + dbgregions("FillRegion %d\n", Index); + for (int y = 0; y < Height(); y++) { + for (int x = 0; x < Width(); x++) + SetIndex(x, y, Index); + } +} + +cSubtitleObject *cSubtitleRegion::GetObjectById(int ObjectId, bool New) +{ + cSubtitleObject *result = NULL; + for (cSubtitleObject *so = objects.First(); so; so = objects.Next(so)) { + if (so->ObjectId() == ObjectId) + result = so; + } + if (!result && New) { + result = new cSubtitleObject(ObjectId, this); + objects.Add(result); + } + return result; +} + +void cSubtitleRegion::SetLevel(int Level) +{ + if (Level > 0 && Level < 4) + level = 1 << Level; +} + +void cSubtitleRegion::SetDepth(int Depth) +{ + if (Depth > 0 && Depth < 4) + SetBpp(1 << Depth); +} + +// --- cDvbSubtitlePage ------------------------------------------------------ + +class cDvbSubtitlePage : public cListObject { +private: + int pageId; + int version; + int state; + int64_t pts; + int timeout; + cList<cSubtitleClut> cluts; +public: + cList<cSubtitleRegion> regions; + cDvbSubtitlePage(int PageId); + virtual ~cDvbSubtitlePage(); + int PageId(void) { return pageId; } + int Version(void) { return version; } + int State(void) { return state; } + tArea *GetAreas(void); + cSubtitleClut *GetClutById(int ClutId, bool New = false); + cSubtitleObject *GetObjectById(int ObjectId); + cSubtitleRegion *GetRegionById(int RegionId, bool New = false); + int64_t Pts(void) const { return pts; } + int Timeout(void) { return timeout; } + void SetVersion(int Version) { version = Version; } + void SetPts(int64_t Pts) { pts = Pts; } + void SetState(int State); + void SetTimeout(int Timeout) { timeout = Timeout; } + void UpdateRegionPalette(cSubtitleClut *Clut); + }; + +cDvbSubtitlePage::cDvbSubtitlePage(int PageId) +{ + pageId = PageId; + version = -1; + state = -1; + pts = 0; + timeout = 0; +} + +cDvbSubtitlePage::~cDvbSubtitlePage() +{ +} + +tArea *cDvbSubtitlePage::GetAreas(void) +{ + if (regions.Count() > 0) { + tArea *Areas = new tArea[regions.Count()]; + tArea *a = Areas; + for (cSubtitleRegion *sr = regions.First(); sr; sr = regions.Next(sr)) { + a->x1 = sr->HorizontalAddress(); + a->y1 = sr->VerticalAddress(); + a->x2 = sr->HorizontalAddress() + sr->Width() - 1; + a->y2 = sr->VerticalAddress() + sr->Height() - 1; + a->bpp = sr->Bpp(); + while ((a->Width() & 3) != 0) + a->x2++; // aligns width to a multiple of 4, so 2, 4 and 8 bpp will work + a++; + } + return Areas; + } + return NULL; +} + +cSubtitleClut *cDvbSubtitlePage::GetClutById(int ClutId, bool New) +{ + cSubtitleClut *result = NULL; + for (cSubtitleClut *sc = cluts.First(); sc; sc = cluts.Next(sc)) { + if (sc->ClutId() == ClutId) + result = sc; + } + if (!result && New) { + result = new cSubtitleClut(ClutId); + cluts.Add(result); + } + return result; +} + +cSubtitleRegion *cDvbSubtitlePage::GetRegionById(int RegionId, bool New) +{ + cSubtitleRegion *result = NULL; + for (cSubtitleRegion *sr = regions.First(); sr; sr = regions.Next(sr)) { + if (sr->RegionId() == RegionId) + result = sr; + } + if (!result && New) { + result = new cSubtitleRegion(RegionId); + regions.Add(result); + } + return result; +} + +cSubtitleObject *cDvbSubtitlePage::GetObjectById(int ObjectId) +{ + cSubtitleObject *result = NULL; + for (cSubtitleRegion *sr = regions.First(); sr && !result; sr = regions.Next(sr)) + result = sr->GetObjectById(ObjectId); + return result; +} + +void cDvbSubtitlePage::SetState(int State) +{ + state = State; + switch (state) { + case 0: // normal case - page update + dbgpages("page update\n"); + break; + case 1: // aquisition point - page refresh + dbgpages("page refresh\n"); + regions.Clear(); + break; + case 2: // mode change - new page + dbgpages("new Page\n"); + regions.Clear(); + cluts.Clear(); + break; + case 3: // reserved + break; + } +} + +void cDvbSubtitlePage::UpdateRegionPalette(cSubtitleClut *Clut) +{ + for (cSubtitleRegion *sr = regions.First(); sr; sr = regions.Next(sr)) { + if (sr->ClutId() == Clut->ClutId()) + sr->Replace(*Clut->GetPalette(sr->Bpp())); + } +} + +// --- cDvbSubtitleAssembler ------------------------------------------------- + +class cDvbSubtitleAssembler { +private: + uchar *data; + int length; + int pos; + int size; + bool Realloc(int Size); +public: + cDvbSubtitleAssembler(void); + virtual ~cDvbSubtitleAssembler(); + void Reset(void); + unsigned char *Get(int &Length); + void Put(const uchar *Data, int Length); + }; + +cDvbSubtitleAssembler::cDvbSubtitleAssembler(void) +{ + data = NULL; + size = 0; + Reset(); +} + +cDvbSubtitleAssembler::~cDvbSubtitleAssembler() +{ + free(data); +} + +void cDvbSubtitleAssembler::Reset(void) +{ + length = 0; + pos = 0; +} + +bool cDvbSubtitleAssembler::Realloc(int Size) +{ + if (Size > size) { + size = max(Size, 2048); + data = (uchar *)realloc(data, size); + if (!data) { + esyslog("ERROR: can't allocate memory for subtitle assembler"); + length = 0; + size = 0; + return false; + } + } + return true; +} + +unsigned char *cDvbSubtitleAssembler::Get(int &Length) +{ + if (length > pos + 5) { + Length = (data[pos + 4] << 8) + data[pos + 5] + 6; + if (length >= pos + Length) { + unsigned char *result = data + pos; + pos += Length; + return result; + } + } + return NULL; +} + +void cDvbSubtitleAssembler::Put(const uchar *Data, int Length) +{ + if (Length && Realloc(length + Length)) { + memcpy(data + length, Data, Length); + length += Length; + } +} + +// --- cDvbSubtitleBitmaps --------------------------------------------------- + +class cDvbSubtitleBitmaps : public cListObject { +private: + int64_t pts; + int timeout; + tArea *areas; + int numAreas; + cVector<cBitmap *> bitmaps; +public: + cDvbSubtitleBitmaps(int64_t Pts, int Timeout, tArea *Areas, int NumAreas); + ~cDvbSubtitleBitmaps(); + int64_t Pts(void) { return pts; } + int Timeout(void) { return timeout; } + void AddBitmap(cBitmap *Bitmap); + void Draw(cOsd *Osd); + }; + +cDvbSubtitleBitmaps::cDvbSubtitleBitmaps(int64_t Pts, int Timeout, tArea *Areas, int NumAreas) +{ + pts = Pts; + timeout = Timeout; + areas = Areas; + numAreas = NumAreas; +} + +cDvbSubtitleBitmaps::~cDvbSubtitleBitmaps() +{ + delete[] areas; + for (int i = 0; i < bitmaps.Size(); i++) + delete bitmaps[i]; +} + +void cDvbSubtitleBitmaps::AddBitmap(cBitmap *Bitmap) +{ + bitmaps.Append(Bitmap); +} + +void cDvbSubtitleBitmaps::Draw(cOsd *Osd) +{ + if (Osd->SetAreas(areas, numAreas) == oeOk) { + for (int i = 0; i < bitmaps.Size(); i++) + Osd->DrawBitmap(bitmaps[i]->X0(), bitmaps[i]->Y0(), *bitmaps[i]); + Osd->Flush(); + } +} + +// --- cDvbSubtitleConverter ------------------------------------------------- + +int cDvbSubtitleConverter::setupLevel = 0; + +cDvbSubtitleConverter::cDvbSubtitleConverter(void) +:cThread("subtitleConverter") +{ + dvbSubtitleAssembler = new cDvbSubtitleAssembler; + osd = NULL; + pages = new cList<cDvbSubtitlePage>; + bitmaps = new cList<cDvbSubtitleBitmaps>; + Start(); +} + +cDvbSubtitleConverter::~cDvbSubtitleConverter() +{ + Cancel(3); + delete dvbSubtitleAssembler; + delete osd; + delete bitmaps; + delete pages; +} + +void cDvbSubtitleConverter::SetupChanged(void) +{ + setupLevel++; +} + +void cDvbSubtitleConverter::Reset(void) +{ + dbgconverter("Converter reset -----------------------\n"); + dvbSubtitleAssembler->Reset(); + Lock(); + pages->Clear(); + bitmaps->Clear(); + DELETENULL(osd); + Unlock(); +} + +int cDvbSubtitleConverter::Convert(const uchar *Data, int Length) +{ + if (Data && Length > 8) { + int PayloadOffset = Data[8] + 9; + int SubstreamHeaderLength = 4; + bool ResetSubtitleAssembler = Data[PayloadOffset + 3] == 0x00; + + // Compatibility mode for old subtitles plugin: + if ((Data[PayloadOffset - 3] & 0x81) == 1 && Data[PayloadOffset - 2] == 0x81) { + PayloadOffset--; + SubstreamHeaderLength = 1; + ResetSubtitleAssembler = Data[8] >= 5; + } + + if (Length > PayloadOffset + SubstreamHeaderLength) { + int64_t pts = 0; + if ((Data[7] & 0x80) && Data[8] >= 5) { + pts = (((int64_t)Data[ 9]) & 0x0E) << 29; + pts |= ( (int64_t)Data[10]) << 22; + pts |= (((int64_t)Data[11]) & 0xFE) << 14; + pts |= ( (int64_t)Data[12]) << 7; + pts |= (((int64_t)Data[13]) & 0xFE) >> 1; + dbgconverter("Converter PTS: %lld\n", pts); + } + const uchar *data = Data + PayloadOffset + SubstreamHeaderLength; // skip substream header + int length = Length - PayloadOffset - SubstreamHeaderLength; // skip substream header + if (ResetSubtitleAssembler) + dvbSubtitleAssembler->Reset(); + + if (length > 3) { + if (data[0] == 0x20 && data[1] == 0x00 && data[2] == 0x0F) + dvbSubtitleAssembler->Put(data + 2, length - 2); + else + dvbSubtitleAssembler->Put(data, length); + + int Count; + while (true) { + unsigned char *b = dvbSubtitleAssembler->Get(Count); + if (b && b[0] == 0x0F) { + if (ExtractSegment(b, Count, pts) == -1) + break; + } + else + break; + } + } + return Length; + } + } + return 0; +} + +#define LimitTo32Bit(n) (n & 0x00000000FFFFFFFFL) +#define MAXDELTA 40000 // max. reasonable PTS/STC delta in ms + +void cDvbSubtitleConverter::Action(void) +{ + int LastSetupLevel = setupLevel; + cTimeMs Timeout; + while (Running()) { + if (osd) { + int NewSetupLevel = setupLevel; + if (Timeout.TimedOut() || LastSetupLevel != NewSetupLevel) { + DELETENULL(osd); + } + LastSetupLevel = NewSetupLevel; + } + int WaitMs = 100; + Lock(); + if (cDvbSubtitleBitmaps *sb = bitmaps->First()) { + int64_t STC = cDevice::PrimaryDevice()->GetSTC(); + int64_t Delta = 0; + if (STC >= 0) { + Delta = LimitTo32Bit(sb->Pts()) - LimitTo32Bit(STC); // some devices only deliver 32 bits + if (Delta > (int64_t(1) << 31)) + Delta -= (int64_t(1) << 32); + else if (Delta < -((int64_t(1) << 31) - 1)) + Delta += (int64_t(1) << 32); + } + else { + //TODO sync on PTS? are there actually devices that don't deliver an STC? + } + Delta /= 90; // STC and PTS are in 1/90000s + if (abs(Delta) <= MAXDELTA) { + if (Delta <= 0) { + dbgconverter("Got %d bitmaps, showing #%d\n", bitmaps->Count(), sb->Index() + 1); + if (AssertOsd()) { + sb->Draw(osd); + Timeout.Set(sb->Timeout() * 1000); + dbgconverter("PTS: %lld STC: %lld (%lld) timeout: %d\n", sb->Pts(), cDevice::PrimaryDevice()->GetSTC(), Delta, sb->Timeout()); + } + bitmaps->Del(sb); + } + else + WaitMs = min(max(Delta, int64_t(0)), int64_t(1000)); + } + else + bitmaps->Del(sb); + } + Unlock(); + cCondWait::SleepMs(WaitMs); + } +} + +tColor cDvbSubtitleConverter::yuv2rgb(int Y, int Cb, int Cr) +{ + int Ey, Epb, Epr; + int Eg, Eb, Er; + + Ey = (Y - 16); + Epb = (Cb - 128); + Epr = (Cr - 128); + /* ITU-R 709 */ + Er = max(min(((298 * Ey + 460 * Epr) / 256), 255), 0); + Eg = max(min(((298 * Ey - 55 * Epb - 137 * Epr) / 256), 255), 0); + Eb = max(min(((298 * Ey + 543 * Epb ) / 256), 255), 0); + + return (Er << 16) | (Eg << 8) | Eb; +} + +bool cDvbSubtitleConverter::AssertOsd(void) +{ + return osd || (osd = cOsdProvider::NewOsd(0, Setup.SubtitleOffset, OSD_LEVEL_SUBTITLES)); +} + +int cDvbSubtitleConverter::ExtractSegment(const uchar *Data, int Length, int64_t Pts) +{ + if (Length > 5 && Data[0] == 0x0F) { + int segmentLength = (Data[4] << 8) + Data[5] + 6; + if (segmentLength > Length) + return -1; + int segmentType = Data[1]; + int pageId = (Data[2] << 8) + Data[3]; + cDvbSubtitlePage *page = NULL; + LOCK_THREAD; + for (cDvbSubtitlePage *sp = pages->First(); sp; sp = pages->Next(sp)) { + if (sp->PageId() == pageId) { + page = sp; + break; + } + } + if (!page) { + page = new cDvbSubtitlePage(pageId); + pages->Add(page); + dbgpages("Create SubtitlePage %d (total pages = %d)\n", pageId, pages->Count()); + } + switch (segmentType) { + case PAGE_COMPOSITION_SEGMENT: { + dbgsegments("PAGE_COMPOSITION_SEGMENT\n"); + int pageVersion = (Data[6 + 1] & 0xF0) >> 4; + if (pageVersion == page->Version()) + break; // no update + page->SetVersion(pageVersion); + if (Pts) + page->SetPts(Pts); + page->SetTimeout(Data[6]); + page->SetState((Data[6 + 1] & 0x0C) >> 2); + page->regions.Clear(); + dbgpages("Update page id %d version %d pts %lld timeout %d state %d\n", pageId, page->Version(), page->Pts(), page->Timeout(), page->State()); + for (int i = 6 + 2; i < segmentLength; i += 6) { + cSubtitleRegion *region = page->GetRegionById(Data[i], true); + region->SetHorizontalAddress((Data[i + 2] << 8) + Data[i + 3]); + region->SetVerticalAddress((Data[i + 4] << 8) + Data[i + 5]); + } + break; + } + case REGION_COMPOSITION_SEGMENT: { + dbgsegments("REGION_COMPOSITION_SEGMENT\n"); + cSubtitleRegion *region = page->GetRegionById(Data[6]); + if (!region) + break; + int regionVersion = (Data[6 + 1] & 0xF0) >> 4; + if (regionVersion == region->Version()) + break; // no update + region->SetVersion(regionVersion); + bool regionFillFlag = (Data[6 + 1] & 0x08) >> 3; + int regionWidth = (Data[6 + 2] << 8) | Data[6 + 3]; + int regionHeight = (Data[6 + 4] << 8) | Data[6 + 5]; + region->SetSize(regionWidth, regionHeight); + region->SetLevel((Data[6 + 6] & 0xE0) >> 5); + region->SetDepth((Data[6 + 6] & 0x1C) >> 2); + region->SetClutId(Data[6 + 7]); + dbgregions("Region pageId %d id %d version %d fill %d width %d height %d level %d depth %d clutId %d\n", pageId, region->RegionId(), region->Version(), regionFillFlag, regionWidth, regionHeight, region->Level(), region->Depth(), region->ClutId()); + if (regionFillFlag) { + switch (region->Bpp()) { + case 2: region->FillRegion((Data[6 + 9] & 0x0C) >> 2); break; + case 4: region->FillRegion((Data[6 + 9] & 0xF0) >> 4); break; + case 8: region->FillRegion(Data[6 + 8]); break; + } + } + for (int i = 6 + 10; i < segmentLength; i += 6) { + cSubtitleObject *object = region->GetObjectById((Data[i] << 8) | Data[i + 1], true); + int objectType = (Data[i + 2] & 0xC0) >> 6; + object->SetCodingMethod(objectType); + object->SetProviderFlag((Data[i + 2] & 0x30) >> 4); + int objectHorizontalPosition = ((Data[i + 2] & 0x0F) << 8) | Data[i + 3]; + int objectVerticalPosition = ((Data[i + 4] & 0x0F) << 8) | Data[i + 5]; + object->SetPosition(objectHorizontalPosition, objectVerticalPosition); + if (objectType == 0x01 || objectType == 0x02) { + object->SetForegroundColor(Data[i + 6]); + object->SetBackgroundColor(Data[i + 7]); + i += 2; + } + } + break; + } + case CLUT_DEFINITION_SEGMENT: { + dbgsegments("CLUT_DEFINITION_SEGMENT\n"); + cSubtitleClut *clut = page->GetClutById(Data[6], true); + int clutVersion = (Data[6 + 1] & 0xF0) >> 4; + if (clutVersion == clut->Version()) + break; // no update + clut->SetVersion(clutVersion); + dbgcluts("Clut pageId %d id %d version %d\n", pageId, clut->ClutId(), clut->Version()); + for (int i = 6 + 2; i < segmentLength; i += 2) { + uchar clutEntryId = Data[i]; + bool fullRangeFlag = Data[i + 1] & 1; + uchar yval; + uchar crval; + uchar cbval; + uchar tval; + if (fullRangeFlag) { + yval = Data[i + 2]; + crval = Data[i + 3]; + cbval = Data[i + 4]; + tval = Data[i + 5]; + } + else { + yval = Data[i + 2] & 0xFC; + crval = (Data[i + 2] & 0x03) << 6; + crval |= (Data[i + 3] & 0xC0) >> 2; + cbval = (Data[i + 3] & 0x3C) << 2; + tval = (Data[i + 3] & 0x03) << 6; + } + tColor value = 0; + if (yval) { + value = yuv2rgb(yval, cbval, crval); + value |= ((10 - (clutEntryId ? Setup.SubtitleFgTransparency : Setup.SubtitleBgTransparency)) * (255 - tval) / 10) << 24; + } + int EntryFlags = Data[i + 1]; + dbgcluts("%2d %d %d %d %08X\n", clutEntryId, (EntryFlags & 0x80) ? 2 : 0, (EntryFlags & 0x40) ? 4 : 0, (EntryFlags & 0x20) ? 8 : 0, value); + if ((EntryFlags & 0x80) != 0) + clut->SetColor(2, clutEntryId, value); + if ((EntryFlags & 0x40) != 0) + clut->SetColor(4, clutEntryId, value); + if ((EntryFlags & 0x20) != 0) + clut->SetColor(8, clutEntryId, value); + i += fullRangeFlag ? 4 : 2; + } + dbgcluts("\n"); + page->UpdateRegionPalette(clut); + break; + } + case OBJECT_DATA_SEGMENT: { + dbgsegments("OBJECT_DATA_SEGMENT\n"); + cSubtitleObject *object = page->GetObjectById((Data[6] << 8) | Data[6 + 1]); + if (!object) + break; + int objectVersion = (Data[6 + 2] & 0xF0) >> 4; + if (objectVersion == object->Version()) + break; // no update + object->SetVersion(objectVersion); + int codingMethod = (Data[6 + 2] & 0x0C) >> 2; + object->SetNonModifyingColorFlag(Data[6 + 2] & 0x01); + dbgobjects("Object pageId %d id %d version %d method %d modify %d\n", pageId, object->ObjectId(), object->Version(), object->CodingMethod(), object->NonModifyingColorFlag()); + if (codingMethod == 0) { // coding of pixels + int i = 6 + 3; + int topFieldLength = (Data[i] << 8) | Data[i + 1]; + int bottomFieldLength = (Data[i + 2] << 8) | Data[i + 3]; + object->DecodeSubBlock(Data + i + 4, topFieldLength, true); + if (bottomFieldLength) + object->DecodeSubBlock(Data + i + 4 + topFieldLength, bottomFieldLength, false); + else + object->DecodeSubBlock(Data + i + 4, topFieldLength, false); + } + else if (codingMethod == 1) { // coded as a string of characters + //TODO implement textual subtitles + } + break; + } + case END_OF_DISPLAY_SET_SEGMENT: { + dbgsegments("END_OF_DISPLAY_SET_SEGMENT\n"); + FinishPage(page); + } + default: + dbgsegments("*** unknown segment type: %02X\n", segmentType); + } + return segmentLength; + } + return -1; +} + +void cDvbSubtitleConverter::FinishPage(cDvbSubtitlePage *Page) +{ + if (!AssertOsd()) + return; + tArea *Areas = Page->GetAreas(); + int NumAreas = Page->regions.Count(); + int Bpp = 8; + bool Reduced = false; + while (osd->CanHandleAreas(Areas, NumAreas) != oeOk) { + int HalfBpp = Bpp / 2; + if (HalfBpp >= 2) { + for (int i = 0; i < NumAreas; i++) { + if (Areas[i].bpp >= Bpp) { + Areas[i].bpp = HalfBpp; + Reduced = true; + } + } + Bpp = HalfBpp; + } + else + return; // unable to draw bitmaps + } + if (Reduced) { + for (int i = 0; i < NumAreas; i++) { + cSubtitleRegion *sr = Page->regions.Get(i); + if (sr->Bpp() != Areas[i].bpp) { + if (sr->Level() <= Areas[i].bpp) { + //TODO this is untested - didn't have any such subtitle stream + cSubtitleClut *Clut = Page->GetClutById(sr->ClutId()); + if (Clut) { + dbgregions("reduce region %d bpp %d level %d area bpp %d\n", sr->RegionId(), sr->Bpp(), sr->Level(), Areas[i].bpp); + sr->ReduceBpp(*Clut->GetPalette(sr->Bpp())); + } + } + else { + dbgregions("condense region %d bpp %d level %d area bpp %d\n", sr->RegionId(), sr->Bpp(), sr->Level(), Areas[i].bpp); + sr->ShrinkBpp(Areas[i].bpp); + } + } + } + } + cDvbSubtitleBitmaps *Bitmaps = new cDvbSubtitleBitmaps(Page->Pts(), Page->Timeout(), Areas, NumAreas); + bitmaps->Add(Bitmaps); + for (cSubtitleRegion *sr = Page->regions.First(); sr; sr = Page->regions.Next(sr)) { + int posX = sr->HorizontalAddress(); + int posY = sr->VerticalAddress(); + cBitmap *bm = new cBitmap(sr->Width(), sr->Height(), sr->Bpp(), posX, posY); + bm->DrawBitmap(posX, posY, *sr); + Bitmaps->AddBitmap(bm); + } +} |