int cDvbSubtitleConverter::Convert(const uchar *Data, int Length)
{
if (Data && Length > 8) {
int PayloadOffset = PesPayloadOffset(Data);
if (Length > PayloadOffset) {
int64_t pts = PesGetPts(Data);
if (pts)
dbgconverter("Converter PTS: %"PRId64"\n", pts);
const uchar *data = Data + PayloadOffset;
int length = Length - PayloadOffset;
if (length > 3) {
if (data[0] == 0x20 && data[1] == 0x00 && data[2] == 0x0F) {
data += 2;
length -= 2;
}
const uchar *b = data;
while (length > 0) {
if (b[0] == 0x0F) {
int n = ExtractSegment(b, length, pts);
if (n < 0)
break;
b += n;
length -= n;
}
else
break;
}
}
}
return Length;
}
return 0;
}
int cParser::ParsePESHeader(uint8_t *buf, size_t len)
{
// parse PES header
unsigned int hdr_len = PesPayloadOffset(buf);
// PTS / DTS
int64_t pts = PesHasPts(buf) ? PesGetPts(buf) : DVD_NOPTS_VALUE;
int64_t dts = PesHasDts(buf) ? PesGetDts(buf) : DVD_NOPTS_VALUE;
if (dts == DVD_NOPTS_VALUE)
dts = pts;
if(pts != 0) m_curDTS = dts;
if(dts != 0) m_curPTS = pts;
return hdr_len;
}
int cDvbSubtitleConverter::ConvertFragments(const uchar *Data, int Length)
{
if (Data && Length > 8) {
int PayloadOffset = PesPayloadOffset(Data);
int SubstreamHeaderLength = 4;
bool ResetSubtitleAssembler = Data[PayloadOffset + 3] == 0x00;
// Compatibility mode for old subtitles plugin:
if ((Data[7] & 0x01) && (Data[PayloadOffset - 3] & 0x81) == 0x01 && Data[PayloadOffset - 2] == 0x81) {
PayloadOffset--;
SubstreamHeaderLength = 1;
ResetSubtitleAssembler = Data[8] >= 5;
}
if (Length > PayloadOffset + SubstreamHeaderLength) {
int64_t pts = PesHasPts(Data) ? PesGetPts(Data) : 0;
if (pts)
dbgconverter("Converter PTS: %"PRId64"\n", pts);
const uchar *data = Data + PayloadOffset + SubstreamHeaderLength; // skip substream header
int length = Length - PayloadOffset - SubstreamHeaderLength; // skip substream header
if (ResetSubtitleAssembler)
dvbSubtitleAssembler->Reset();
if (length > 3) {
if (data[0] == 0x20 && data[1] == 0x00 && data[2] == 0x0F)
dvbSubtitleAssembler->Put(data + 2, length - 2);
else
dvbSubtitleAssembler->Put(data, length);
int Count;
while (true) {
unsigned char *b = dvbSubtitleAssembler->Get(Count);
if (b && b[0] == 0x0F) {
if (ExtractSegment(b, Count, pts) == -1)
break;
}
else
break;
}
}
}
return Length;
}
return 0;
}
