mirror of
https://github.com/vdr-projects/vdr.git
synced 2025-03-01 10:50:46 +00:00
7df66b0587
Original announce message:
VDR developer version 1.7.20 is now available at
ftp://ftp.tvdr.de/vdr/Developer/vdr-1.7.20.tar.bz2
A 'diff' against the previous version is available at
ftp://ftp.tvdr.de/vdr/Developer/vdr-1.7.19-1.7.20.diff
MD5 checksums:
eda2911fff1715ba5b1482b20ad18188 vdr-1.7.20.tar.bz2
a8f5bcaf3294cc9fce87283a618d5ce1 vdr-1.7.19-1.7.20.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.
This version contains functions to determine the "signal strength"
and "signal quality" through cDevice. If you are using a DVB card that
contains an stb0899 frontend chip (like the TT-budget S2-3200) you may
want to apply the patches from
ftp://ftp.tvdr.de/vdr/Developer/Driver-Patches
to the LinuxDVB driver source in order to receive useful results from
that frontend.
From the HISTORY file:
- Added some missing 'const' to tChannelID (reported by Sundararaj Reel).
- The isnumber() function now checks the given pointer for NULL (thanks to Holger
Dengler).
- Now checking Setup.InitialChannel for NULL before using it (reported by
Christoph Haubrich).
- cSkins::Message() now blocks calls from background threads (thanks to Michael
Eiler for reporting a crash in such a scenario).
- Fixed the return value of the svdrpsend.pl script in case of an error (thanks to
Jonas Diemer).
- Increased MAXCAIDS to 12 (thanks to Jerome Lacarriere).
- Fixed handling DiSEqC codes (thanks to Mark Hawes for reporting the bug, and
Udo Richter for suggesting the fix).
- Added a mechanism to defer timer handling in case of problems (reported by
Frank Niederwipper).
- Fixed distortions that happened when splitting recording into several files
(was a side effect of "Fixed detecting frames in case the Picture Start Code or
Access Unit Delimiter extends over TS packet boundaries" in version 1.7.19).
cRecorder::Action() now buffers TS packets in case the frame type is
not yet known when a new payload starts. This adds no overhead for channels
that broadcast the frame type within the first TS packet of a payload; it only
kicks in if that information is not in the first TS packet.
- Fixed handling the channelID in cMenuEditChanItem (thanks to Udo Richter).
- cStringList::Sort() can now be called with a boolean parameter that controls
case insensitive sorting (suggested by Sundararaj Reel).
- Now scanning new transponders before old ones, to make sure transponder changes
are recognized (thanks to Reinhard Nissl).
- Implemented static cIndexFile::IndexFileName().
- The length (as number of frames) of a recording's index file can now be determined
by a call to cIndexFile::GetLength() (suggested by Christoph Haubrich).
- Fixed some crashes in subtitle display (thanks to Rolf Ahrenberg).
- Made DELETENULL() thread safe (reported by Rolf Ahrenberg).
- The pic2mpg script of the 'pictures' plugin now generates HD images (thanks to
Andre Weidemann for his support in using convert/ffmpeg). The old SD version is
still available as pic2mpg-sd.
- Added a mutex to protect cOsd::Osds from simultaneous access from different threads
(reported by Rolf Ahrenberg).
- The cutter now sets the 'broken link' flag for MPEG2 TS recordings (thanks to
Oliver Endriss).
- Fixed language code entry for Portuguese.
- The new command line options --filesize (suggested by Marco Göbenich) and --split
can be used together with --edit to set the maximum video file size and turn on
splitting edited files at the editing marks. These options must be given before
--edit to have an effect.
- cTimeMs is no longer initialized to the current time if the value given to the
constructor is negative (avoids the "cTimeMs: using monotonic clock..." log message
before VDR's starting log message).
1029 lines
37 KiB
C
1029 lines
37 KiB
C
/*
|
|
* remux.c: Tools for detecting frames and handling PAT/PMT
|
|
*
|
|
* See the main source file 'vdr.c' for copyright information and
|
|
* how to reach the author.
|
|
*
|
|
* $Id: remux.c 2.58 2011/08/15 09:50:14 kls Exp $
|
|
*/
|
|
|
|
#include "remux.h"
|
|
#include "device.h"
|
|
#include "libsi/si.h"
|
|
#include "libsi/section.h"
|
|
#include "libsi/descriptor.h"
|
|
#include "recording.h"
|
|
#include "shutdown.h"
|
|
#include "tools.h"
|
|
|
|
// Set these to 'true' for debug output:
|
|
static bool DebugPatPmt = false;
|
|
static bool DebugFrames = false;
|
|
|
|
#define dbgpatpmt(a...) if (DebugPatPmt) fprintf(stderr, a)
|
|
#define dbgframes(a...) if (DebugFrames) fprintf(stderr, a)
|
|
|
|
ePesHeader AnalyzePesHeader(const uchar *Data, int Count, int &PesPayloadOffset, bool *ContinuationHeader)
|
|
{
|
|
if (Count < 7)
|
|
return phNeedMoreData; // too short
|
|
|
|
if ((Data[6] & 0xC0) == 0x80) { // MPEG 2
|
|
if (Count < 9)
|
|
return phNeedMoreData; // too short
|
|
|
|
PesPayloadOffset = 6 + 3 + Data[8];
|
|
if (Count < PesPayloadOffset)
|
|
return phNeedMoreData; // too short
|
|
|
|
if (ContinuationHeader)
|
|
*ContinuationHeader = ((Data[6] == 0x80) && !Data[7] && !Data[8]);
|
|
|
|
return phMPEG2; // MPEG 2
|
|
}
|
|
|
|
// check for MPEG 1 ...
|
|
PesPayloadOffset = 6;
|
|
|
|
// skip up to 16 stuffing bytes
|
|
for (int i = 0; i < 16; i++) {
|
|
if (Data[PesPayloadOffset] != 0xFF)
|
|
break;
|
|
|
|
if (Count <= ++PesPayloadOffset)
|
|
return phNeedMoreData; // too short
|
|
}
|
|
|
|
// skip STD_buffer_scale/size
|
|
if ((Data[PesPayloadOffset] & 0xC0) == 0x40) {
|
|
PesPayloadOffset += 2;
|
|
|
|
if (Count <= PesPayloadOffset)
|
|
return phNeedMoreData; // too short
|
|
}
|
|
|
|
if (ContinuationHeader)
|
|
*ContinuationHeader = false;
|
|
|
|
if ((Data[PesPayloadOffset] & 0xF0) == 0x20) {
|
|
// skip PTS only
|
|
PesPayloadOffset += 5;
|
|
}
|
|
else if ((Data[PesPayloadOffset] & 0xF0) == 0x30) {
|
|
// skip PTS and DTS
|
|
PesPayloadOffset += 10;
|
|
}
|
|
else if (Data[PesPayloadOffset] == 0x0F) {
|
|
// continuation header
|
|
PesPayloadOffset++;
|
|
|
|
if (ContinuationHeader)
|
|
*ContinuationHeader = true;
|
|
}
|
|
else
|
|
return phInvalid; // unknown
|
|
|
|
if (Count < PesPayloadOffset)
|
|
return phNeedMoreData; // too short
|
|
|
|
return phMPEG1; // MPEG 1
|
|
}
|
|
|
|
#define VIDEO_STREAM_S 0xE0
|
|
|
|
// --- cRemux ----------------------------------------------------------------
|
|
|
|
void cRemux::SetBrokenLink(uchar *Data, int Length)
|
|
{
|
|
int PesPayloadOffset = 0;
|
|
if (AnalyzePesHeader(Data, Length, PesPayloadOffset) >= phMPEG1 && (Data[3] & 0xF0) == VIDEO_STREAM_S) {
|
|
for (int i = PesPayloadOffset; i < Length - 7; i++) {
|
|
if (Data[i] == 0 && Data[i + 1] == 0 && Data[i + 2] == 1 && Data[i + 3] == 0xB8) {
|
|
if (!(Data[i + 7] & 0x40)) // set flag only if GOP is not closed
|
|
Data[i + 7] |= 0x20;
|
|
return;
|
|
}
|
|
}
|
|
dsyslog("SetBrokenLink: no GOP header found in video packet");
|
|
}
|
|
else
|
|
dsyslog("SetBrokenLink: no video packet in frame");
|
|
}
|
|
|
|
// --- Some TS handling tools ------------------------------------------------
|
|
|
|
int64_t TsGetPts(const uchar *p, int l)
|
|
{
|
|
// Find the first packet with a PTS and use it:
|
|
while (l > 0) {
|
|
const uchar *d = p;
|
|
if (TsPayloadStart(d) && TsGetPayload(&d) && PesHasPts(d))
|
|
return PesGetPts(d);
|
|
p += TS_SIZE;
|
|
l -= TS_SIZE;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
void TsSetTeiOnBrokenPackets(uchar *p, int l)
|
|
{
|
|
bool Processed[MAXPID] = { false };
|
|
while (l >= TS_SIZE) {
|
|
if (*p != TS_SYNC_BYTE)
|
|
break;
|
|
int Pid = TsPid(p);
|
|
if (!Processed[Pid]) {
|
|
if (!TsPayloadStart(p))
|
|
p[1] |= TS_ERROR;
|
|
else {
|
|
Processed[Pid] = true;
|
|
int offs = TsPayloadOffset(p);
|
|
cRemux::SetBrokenLink(p + offs, TS_SIZE - offs);
|
|
}
|
|
}
|
|
l -= TS_SIZE;
|
|
p += TS_SIZE;
|
|
}
|
|
}
|
|
|
|
// --- cPatPmtGenerator ------------------------------------------------------
|
|
|
|
cPatPmtGenerator::cPatPmtGenerator(const cChannel *Channel)
|
|
{
|
|
numPmtPackets = 0;
|
|
patCounter = pmtCounter = 0;
|
|
patVersion = pmtVersion = 0;
|
|
pmtPid = 0;
|
|
esInfoLength = NULL;
|
|
SetChannel(Channel);
|
|
}
|
|
|
|
void cPatPmtGenerator::IncCounter(int &Counter, uchar *TsPacket)
|
|
{
|
|
TsPacket[3] = (TsPacket[3] & 0xF0) | Counter;
|
|
if (++Counter > 0x0F)
|
|
Counter = 0x00;
|
|
}
|
|
|
|
void cPatPmtGenerator::IncVersion(int &Version)
|
|
{
|
|
if (++Version > 0x1F)
|
|
Version = 0x00;
|
|
}
|
|
|
|
void cPatPmtGenerator::IncEsInfoLength(int Length)
|
|
{
|
|
if (esInfoLength) {
|
|
Length += ((*esInfoLength & 0x0F) << 8) | *(esInfoLength + 1);
|
|
*esInfoLength = 0xF0 | (Length >> 8);
|
|
*(esInfoLength + 1) = Length;
|
|
}
|
|
}
|
|
|
|
int cPatPmtGenerator::MakeStream(uchar *Target, uchar Type, int Pid)
|
|
{
|
|
int i = 0;
|
|
Target[i++] = Type; // stream type
|
|
Target[i++] = 0xE0 | (Pid >> 8); // dummy (3), pid hi (5)
|
|
Target[i++] = Pid; // pid lo
|
|
esInfoLength = &Target[i];
|
|
Target[i++] = 0xF0; // dummy (4), ES info length hi
|
|
Target[i++] = 0x00; // ES info length lo
|
|
return i;
|
|
}
|
|
|
|
int cPatPmtGenerator::MakeAC3Descriptor(uchar *Target, uchar Type)
|
|
{
|
|
int i = 0;
|
|
Target[i++] = Type;
|
|
Target[i++] = 0x01; // length
|
|
Target[i++] = 0x00;
|
|
IncEsInfoLength(i);
|
|
return i;
|
|
}
|
|
|
|
int cPatPmtGenerator::MakeSubtitlingDescriptor(uchar *Target, const char *Language, uchar SubtitlingType, uint16_t CompositionPageId, uint16_t AncillaryPageId)
|
|
{
|
|
int i = 0;
|
|
Target[i++] = SI::SubtitlingDescriptorTag;
|
|
Target[i++] = 0x08; // length
|
|
Target[i++] = *Language++;
|
|
Target[i++] = *Language++;
|
|
Target[i++] = *Language++;
|
|
Target[i++] = SubtitlingType;
|
|
Target[i++] = CompositionPageId >> 8;
|
|
Target[i++] = CompositionPageId & 0xFF;
|
|
Target[i++] = AncillaryPageId >> 8;
|
|
Target[i++] = AncillaryPageId & 0xFF;
|
|
IncEsInfoLength(i);
|
|
return i;
|
|
}
|
|
|
|
int cPatPmtGenerator::MakeLanguageDescriptor(uchar *Target, const char *Language)
|
|
{
|
|
int i = 0;
|
|
Target[i++] = SI::ISO639LanguageDescriptorTag;
|
|
int Length = i++;
|
|
Target[Length] = 0x00; // length
|
|
for (const char *End = Language + strlen(Language); Language < End; ) {
|
|
Target[i++] = *Language++;
|
|
Target[i++] = *Language++;
|
|
Target[i++] = *Language++;
|
|
Target[i++] = 0x00; // audio type
|
|
Target[Length] += 0x04; // length
|
|
if (*Language == '+')
|
|
Language++;
|
|
}
|
|
IncEsInfoLength(i);
|
|
return i;
|
|
}
|
|
|
|
int cPatPmtGenerator::MakeCRC(uchar *Target, const uchar *Data, int Length)
|
|
{
|
|
int crc = SI::CRC32::crc32((const char *)Data, Length, 0xFFFFFFFF);
|
|
int i = 0;
|
|
Target[i++] = crc >> 24;
|
|
Target[i++] = crc >> 16;
|
|
Target[i++] = crc >> 8;
|
|
Target[i++] = crc;
|
|
return i;
|
|
}
|
|
|
|
#define P_TSID 0x8008 // pseudo TS ID
|
|
#define P_PMT_PID 0x0084 // pseudo PMT pid
|
|
#define MAXPID 0x2000 // the maximum possible number of pids
|
|
|
|
void cPatPmtGenerator::GeneratePmtPid(const cChannel *Channel)
|
|
{
|
|
bool Used[MAXPID] = { false };
|
|
#define SETPID(p) { if ((p) >= 0 && (p) < MAXPID) Used[p] = true; }
|
|
#define SETPIDS(l) { const int *p = l; while (*p) { SETPID(*p); p++; } }
|
|
SETPID(Channel->Vpid());
|
|
SETPID(Channel->Ppid());
|
|
SETPID(Channel->Tpid());
|
|
SETPIDS(Channel->Apids());
|
|
SETPIDS(Channel->Dpids());
|
|
SETPIDS(Channel->Spids());
|
|
for (pmtPid = P_PMT_PID; Used[pmtPid]; pmtPid++)
|
|
;
|
|
}
|
|
|
|
void cPatPmtGenerator::GeneratePat(void)
|
|
{
|
|
memset(pat, 0xFF, sizeof(pat));
|
|
uchar *p = pat;
|
|
int i = 0;
|
|
p[i++] = TS_SYNC_BYTE; // TS indicator
|
|
p[i++] = TS_PAYLOAD_START | (PATPID >> 8); // flags (3), pid hi (5)
|
|
p[i++] = PATPID & 0xFF; // pid lo
|
|
p[i++] = 0x10; // flags (4), continuity counter (4)
|
|
p[i++] = 0x00; // pointer field (payload unit start indicator is set)
|
|
int PayloadStart = i;
|
|
p[i++] = 0x00; // table id
|
|
p[i++] = 0xB0; // section syntax indicator (1), dummy (3), section length hi (4)
|
|
int SectionLength = i;
|
|
p[i++] = 0x00; // section length lo (filled in later)
|
|
p[i++] = P_TSID >> 8; // TS id hi
|
|
p[i++] = P_TSID & 0xFF; // TS id lo
|
|
p[i++] = 0xC1 | (patVersion << 1); // dummy (2), version number (5), current/next indicator (1)
|
|
p[i++] = 0x00; // section number
|
|
p[i++] = 0x00; // last section number
|
|
p[i++] = pmtPid >> 8; // program number hi
|
|
p[i++] = pmtPid & 0xFF; // program number lo
|
|
p[i++] = 0xE0 | (pmtPid >> 8); // dummy (3), PMT pid hi (5)
|
|
p[i++] = pmtPid & 0xFF; // PMT pid lo
|
|
pat[SectionLength] = i - SectionLength - 1 + 4; // -2 = SectionLength storage, +4 = length of CRC
|
|
MakeCRC(pat + i, pat + PayloadStart, i - PayloadStart);
|
|
IncVersion(patVersion);
|
|
}
|
|
|
|
void cPatPmtGenerator::GeneratePmt(const cChannel *Channel)
|
|
{
|
|
// generate the complete PMT section:
|
|
uchar buf[MAX_SECTION_SIZE];
|
|
memset(buf, 0xFF, sizeof(buf));
|
|
numPmtPackets = 0;
|
|
if (Channel) {
|
|
int Vpid = Channel->Vpid();
|
|
int Ppid = Channel->Ppid();
|
|
uchar *p = buf;
|
|
int i = 0;
|
|
p[i++] = 0x02; // table id
|
|
int SectionLength = i;
|
|
p[i++] = 0xB0; // section syntax indicator (1), dummy (3), section length hi (4)
|
|
p[i++] = 0x00; // section length lo (filled in later)
|
|
p[i++] = pmtPid >> 8; // program number hi
|
|
p[i++] = pmtPid & 0xFF; // program number lo
|
|
p[i++] = 0xC1 | (pmtVersion << 1); // dummy (2), version number (5), current/next indicator (1)
|
|
p[i++] = 0x00; // section number
|
|
p[i++] = 0x00; // last section number
|
|
p[i++] = 0xE0 | (Ppid >> 8); // dummy (3), PCR pid hi (5)
|
|
p[i++] = Ppid; // PCR pid lo
|
|
p[i++] = 0xF0; // dummy (4), program info length hi (4)
|
|
p[i++] = 0x00; // program info length lo
|
|
|
|
if (Vpid)
|
|
i += MakeStream(buf + i, Channel->Vtype(), Vpid);
|
|
for (int n = 0; Channel->Apid(n); n++) {
|
|
i += MakeStream(buf + i, Channel->Atype(n), Channel->Apid(n));
|
|
const char *Alang = Channel->Alang(n);
|
|
i += MakeLanguageDescriptor(buf + i, Alang);
|
|
}
|
|
for (int n = 0; Channel->Dpid(n); n++) {
|
|
i += MakeStream(buf + i, 0x06, Channel->Dpid(n));
|
|
i += MakeAC3Descriptor(buf + i, Channel->Dtype(n));
|
|
i += MakeLanguageDescriptor(buf + i, Channel->Dlang(n));
|
|
}
|
|
for (int n = 0; Channel->Spid(n); n++) {
|
|
i += MakeStream(buf + i, 0x06, Channel->Spid(n));
|
|
i += MakeSubtitlingDescriptor(buf + i, Channel->Slang(n), Channel->SubtitlingType(n), Channel->CompositionPageId(n), Channel->AncillaryPageId(n));
|
|
}
|
|
|
|
int sl = i - SectionLength - 2 + 4; // -2 = SectionLength storage, +4 = length of CRC
|
|
buf[SectionLength] |= (sl >> 8) & 0x0F;
|
|
buf[SectionLength + 1] = sl;
|
|
MakeCRC(buf + i, buf, i);
|
|
// split the PMT section into several TS packets:
|
|
uchar *q = buf;
|
|
bool pusi = true;
|
|
while (i > 0) {
|
|
uchar *p = pmt[numPmtPackets++];
|
|
int j = 0;
|
|
p[j++] = TS_SYNC_BYTE; // TS indicator
|
|
p[j++] = (pusi ? TS_PAYLOAD_START : 0x00) | (pmtPid >> 8); // flags (3), pid hi (5)
|
|
p[j++] = pmtPid & 0xFF; // pid lo
|
|
p[j++] = 0x10; // flags (4), continuity counter (4)
|
|
if (pusi) {
|
|
p[j++] = 0x00; // pointer field (payload unit start indicator is set)
|
|
pusi = false;
|
|
}
|
|
int l = TS_SIZE - j;
|
|
memcpy(p + j, q, l);
|
|
q += l;
|
|
i -= l;
|
|
}
|
|
IncVersion(pmtVersion);
|
|
}
|
|
}
|
|
|
|
void cPatPmtGenerator::SetVersions(int PatVersion, int PmtVersion)
|
|
{
|
|
patVersion = PatVersion & 0x1F;
|
|
pmtVersion = PmtVersion & 0x1F;
|
|
}
|
|
|
|
void cPatPmtGenerator::SetChannel(const cChannel *Channel)
|
|
{
|
|
if (Channel) {
|
|
GeneratePmtPid(Channel);
|
|
GeneratePat();
|
|
GeneratePmt(Channel);
|
|
}
|
|
}
|
|
|
|
uchar *cPatPmtGenerator::GetPat(void)
|
|
{
|
|
IncCounter(patCounter, pat);
|
|
return pat;
|
|
}
|
|
|
|
uchar *cPatPmtGenerator::GetPmt(int &Index)
|
|
{
|
|
if (Index < numPmtPackets) {
|
|
IncCounter(pmtCounter, pmt[Index]);
|
|
return pmt[Index++];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
// --- cPatPmtParser ---------------------------------------------------------
|
|
|
|
cPatPmtParser::cPatPmtParser(bool UpdatePrimaryDevice)
|
|
{
|
|
updatePrimaryDevice = UpdatePrimaryDevice;
|
|
Reset();
|
|
}
|
|
|
|
void cPatPmtParser::Reset(void)
|
|
{
|
|
pmtSize = 0;
|
|
patVersion = pmtVersion = -1;
|
|
pmtPid = -1;
|
|
vpid = vtype = 0;
|
|
ppid = 0;
|
|
}
|
|
|
|
void cPatPmtParser::ParsePat(const uchar *Data, int Length)
|
|
{
|
|
// Unpack the TS packet:
|
|
int PayloadOffset = TsPayloadOffset(Data);
|
|
Data += PayloadOffset;
|
|
Length -= PayloadOffset;
|
|
// The PAT is always assumed to fit into a single TS packet
|
|
if ((Length -= Data[0] + 1) <= 0)
|
|
return;
|
|
Data += Data[0] + 1; // process pointer_field
|
|
SI::PAT Pat(Data, false);
|
|
if (Pat.CheckCRCAndParse()) {
|
|
dbgpatpmt("PAT: TSid = %d, c/n = %d, v = %d, s = %d, ls = %d\n", Pat.getTransportStreamId(), Pat.getCurrentNextIndicator(), Pat.getVersionNumber(), Pat.getSectionNumber(), Pat.getLastSectionNumber());
|
|
if (patVersion == Pat.getVersionNumber())
|
|
return;
|
|
SI::PAT::Association assoc;
|
|
for (SI::Loop::Iterator it; Pat.associationLoop.getNext(assoc, it); ) {
|
|
dbgpatpmt(" isNITPid = %d\n", assoc.isNITPid());
|
|
if (!assoc.isNITPid()) {
|
|
pmtPid = assoc.getPid();
|
|
dbgpatpmt(" service id = %d, pid = %d\n", assoc.getServiceId(), assoc.getPid());
|
|
}
|
|
}
|
|
patVersion = Pat.getVersionNumber();
|
|
}
|
|
else
|
|
esyslog("ERROR: can't parse PAT");
|
|
}
|
|
|
|
void cPatPmtParser::ParsePmt(const uchar *Data, int Length)
|
|
{
|
|
// Unpack the TS packet:
|
|
bool PayloadStart = TsPayloadStart(Data);
|
|
int PayloadOffset = TsPayloadOffset(Data);
|
|
Data += PayloadOffset;
|
|
Length -= PayloadOffset;
|
|
// The PMT may extend over several TS packets, so we need to assemble them
|
|
if (PayloadStart) {
|
|
pmtSize = 0;
|
|
if ((Length -= Data[0] + 1) <= 0)
|
|
return;
|
|
Data += Data[0] + 1; // this is the first packet
|
|
if (SectionLength(Data, Length) > Length) {
|
|
if (Length <= int(sizeof(pmt))) {
|
|
memcpy(pmt, Data, Length);
|
|
pmtSize = Length;
|
|
}
|
|
else
|
|
esyslog("ERROR: PMT packet length too big (%d byte)!", Length);
|
|
return;
|
|
}
|
|
// the packet contains the entire PMT section, so we run into the actual parsing
|
|
}
|
|
else if (pmtSize > 0) {
|
|
// this is a following packet, so we add it to the pmt storage
|
|
if (Length <= int(sizeof(pmt)) - pmtSize) {
|
|
memcpy(pmt + pmtSize, Data, Length);
|
|
pmtSize += Length;
|
|
}
|
|
else {
|
|
esyslog("ERROR: PMT section length too big (%d byte)!", pmtSize + Length);
|
|
pmtSize = 0;
|
|
}
|
|
if (SectionLength(pmt, pmtSize) > pmtSize)
|
|
return; // more packets to come
|
|
// the PMT section is now complete, so we run into the actual parsing
|
|
Data = pmt;
|
|
}
|
|
else
|
|
return; // fragment of broken packet - ignore
|
|
SI::PMT Pmt(Data, false);
|
|
if (Pmt.CheckCRCAndParse()) {
|
|
dbgpatpmt("PMT: sid = %d, c/n = %d, v = %d, s = %d, ls = %d\n", Pmt.getServiceId(), Pmt.getCurrentNextIndicator(), Pmt.getVersionNumber(), Pmt.getSectionNumber(), Pmt.getLastSectionNumber());
|
|
dbgpatpmt(" pcr = %d\n", Pmt.getPCRPid());
|
|
if (pmtVersion == Pmt.getVersionNumber())
|
|
return;
|
|
if (updatePrimaryDevice)
|
|
cDevice::PrimaryDevice()->ClrAvailableTracks(false, true);
|
|
int NumApids = 0;
|
|
int NumDpids = 0;
|
|
int NumSpids = 0;
|
|
vpid = vtype = 0;
|
|
ppid = 0;
|
|
apids[0] = 0;
|
|
dpids[0] = 0;
|
|
spids[0] = 0;
|
|
atypes[0] = 0;
|
|
dtypes[0] = 0;
|
|
SI::PMT::Stream stream;
|
|
for (SI::Loop::Iterator it; Pmt.streamLoop.getNext(stream, it); ) {
|
|
dbgpatpmt(" stream type = %02X, pid = %d", stream.getStreamType(), stream.getPid());
|
|
switch (stream.getStreamType()) {
|
|
case 0x01: // STREAMTYPE_11172_VIDEO
|
|
case 0x02: // STREAMTYPE_13818_VIDEO
|
|
case 0x1B: // MPEG4
|
|
vpid = stream.getPid();
|
|
vtype = stream.getStreamType();
|
|
ppid = Pmt.getPCRPid();
|
|
break;
|
|
case 0x03: // STREAMTYPE_11172_AUDIO
|
|
case 0x04: // STREAMTYPE_13818_AUDIO
|
|
case 0x0F: // ISO/IEC 13818-7 Audio with ADTS transport sytax
|
|
case 0x11: // ISO/IEC 14496-3 Audio with LATM transport syntax
|
|
{
|
|
if (NumApids < MAXAPIDS) {
|
|
apids[NumApids] = stream.getPid();
|
|
atypes[NumApids] = stream.getStreamType();
|
|
*alangs[NumApids] = 0;
|
|
SI::Descriptor *d;
|
|
for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
|
|
switch (d->getDescriptorTag()) {
|
|
case SI::ISO639LanguageDescriptorTag: {
|
|
SI::ISO639LanguageDescriptor *ld = (SI::ISO639LanguageDescriptor *)d;
|
|
SI::ISO639LanguageDescriptor::Language l;
|
|
char *s = alangs[NumApids];
|
|
int n = 0;
|
|
for (SI::Loop::Iterator it; ld->languageLoop.getNext(l, it); ) {
|
|
if (*ld->languageCode != '-') { // some use "---" to indicate "none"
|
|
dbgpatpmt(" '%s'", l.languageCode);
|
|
if (n > 0)
|
|
*s++ = '+';
|
|
strn0cpy(s, I18nNormalizeLanguageCode(l.languageCode), MAXLANGCODE1);
|
|
s += strlen(s);
|
|
if (n++ > 1)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
default: ;
|
|
}
|
|
delete d;
|
|
}
|
|
if (updatePrimaryDevice)
|
|
cDevice::PrimaryDevice()->SetAvailableTrack(ttAudio, NumApids, apids[NumApids], alangs[NumApids]);
|
|
NumApids++;
|
|
apids[NumApids]= 0;
|
|
}
|
|
}
|
|
break;
|
|
case 0x06: // STREAMTYPE_13818_PES_PRIVATE
|
|
{
|
|
int dpid = 0;
|
|
int dtype = 0;
|
|
char lang[MAXLANGCODE1] = "";
|
|
SI::Descriptor *d;
|
|
for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
|
|
switch (d->getDescriptorTag()) {
|
|
case SI::AC3DescriptorTag:
|
|
case SI::EnhancedAC3DescriptorTag:
|
|
dbgpatpmt(" AC3");
|
|
dpid = stream.getPid();
|
|
dtype = d->getDescriptorTag();
|
|
break;
|
|
case SI::SubtitlingDescriptorTag:
|
|
dbgpatpmt(" subtitling");
|
|
if (NumSpids < MAXSPIDS) {
|
|
spids[NumSpids] = stream.getPid();
|
|
*slangs[NumSpids] = 0;
|
|
subtitlingTypes[NumSpids] = 0;
|
|
compositionPageIds[NumSpids] = 0;
|
|
ancillaryPageIds[NumSpids] = 0;
|
|
SI::SubtitlingDescriptor *sd = (SI::SubtitlingDescriptor *)d;
|
|
SI::SubtitlingDescriptor::Subtitling sub;
|
|
char *s = slangs[NumSpids];
|
|
int n = 0;
|
|
for (SI::Loop::Iterator it; sd->subtitlingLoop.getNext(sub, it); ) {
|
|
if (sub.languageCode[0]) {
|
|
dbgpatpmt(" '%s'", sub.languageCode);
|
|
subtitlingTypes[NumSpids] = sub.getSubtitlingType();
|
|
compositionPageIds[NumSpids] = sub.getCompositionPageId();
|
|
ancillaryPageIds[NumSpids] = sub.getAncillaryPageId();
|
|
if (n > 0)
|
|
*s++ = '+';
|
|
strn0cpy(s, I18nNormalizeLanguageCode(sub.languageCode), MAXLANGCODE1);
|
|
s += strlen(s);
|
|
if (n++ > 1)
|
|
break;
|
|
}
|
|
}
|
|
if (updatePrimaryDevice)
|
|
cDevice::PrimaryDevice()->SetAvailableTrack(ttSubtitle, NumSpids, spids[NumSpids], slangs[NumSpids]);
|
|
NumSpids++;
|
|
spids[NumSpids]= 0;
|
|
}
|
|
break;
|
|
case SI::ISO639LanguageDescriptorTag: {
|
|
SI::ISO639LanguageDescriptor *ld = (SI::ISO639LanguageDescriptor *)d;
|
|
dbgpatpmt(" '%s'", ld->languageCode);
|
|
strn0cpy(lang, I18nNormalizeLanguageCode(ld->languageCode), MAXLANGCODE1);
|
|
}
|
|
break;
|
|
default: ;
|
|
}
|
|
delete d;
|
|
}
|
|
if (dpid) {
|
|
if (NumDpids < MAXDPIDS) {
|
|
dpids[NumDpids] = dpid;
|
|
dtypes[NumDpids] = dtype;
|
|
strn0cpy(dlangs[NumDpids], lang, sizeof(dlangs[NumDpids]));
|
|
if (updatePrimaryDevice && Setup.UseDolbyDigital)
|
|
cDevice::PrimaryDevice()->SetAvailableTrack(ttDolby, NumDpids, dpid, lang);
|
|
NumDpids++;
|
|
dpids[NumDpids]= 0;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
default: ;
|
|
}
|
|
dbgpatpmt("\n");
|
|
if (updatePrimaryDevice) {
|
|
cDevice::PrimaryDevice()->EnsureAudioTrack(true);
|
|
cDevice::PrimaryDevice()->EnsureSubtitleTrack();
|
|
}
|
|
}
|
|
pmtVersion = Pmt.getVersionNumber();
|
|
}
|
|
else
|
|
esyslog("ERROR: can't parse PMT");
|
|
pmtSize = 0;
|
|
}
|
|
|
|
bool cPatPmtParser::GetVersions(int &PatVersion, int &PmtVersion) const
|
|
{
|
|
PatVersion = patVersion;
|
|
PmtVersion = pmtVersion;
|
|
return patVersion >= 0 && pmtVersion >= 0;
|
|
}
|
|
|
|
// --- cTsToPes --------------------------------------------------------------
|
|
|
|
cTsToPes::cTsToPes(void)
|
|
{
|
|
data = NULL;
|
|
size = 0;
|
|
Reset();
|
|
}
|
|
|
|
cTsToPes::~cTsToPes()
|
|
{
|
|
free(data);
|
|
}
|
|
|
|
void cTsToPes::PutTs(const uchar *Data, int Length)
|
|
{
|
|
if (TsError(Data)) {
|
|
Reset();
|
|
return; // ignore packets with TEI set, and drop any PES data collected so far
|
|
}
|
|
if (TsPayloadStart(Data))
|
|
Reset();
|
|
else if (!size)
|
|
return; // skip everything before the first payload start
|
|
Length = TsGetPayload(&Data);
|
|
if (length + Length > size) {
|
|
int NewSize = max(KILOBYTE(2), length + Length);
|
|
if (uchar *NewData = (uchar *)realloc(data, NewSize)) {
|
|
data = NewData;
|
|
size = NewSize;
|
|
}
|
|
else {
|
|
esyslog("ERROR: out of memory");
|
|
Reset();
|
|
return;
|
|
}
|
|
}
|
|
memcpy(data + length, Data, Length);
|
|
length += Length;
|
|
}
|
|
|
|
#define MAXPESLENGTH 0xFFF0
|
|
|
|
const uchar *cTsToPes::GetPes(int &Length)
|
|
{
|
|
if (repeatLast) {
|
|
repeatLast = false;
|
|
Length = lastLength;
|
|
return lastData;
|
|
}
|
|
if (offset < length && PesLongEnough(length)) {
|
|
if (!PesHasLength(data)) // this is a video PES packet with undefined length
|
|
offset = 6; // trigger setting PES length for initial slice
|
|
if (offset) {
|
|
uchar *p = data + offset - 6;
|
|
if (p != data) {
|
|
p -= 3;
|
|
memmove(p, data, 4);
|
|
}
|
|
int l = min(length - offset, MAXPESLENGTH);
|
|
offset += l;
|
|
if (p != data) {
|
|
l += 3;
|
|
p[6] = 0x80;
|
|
p[7] = 0x00;
|
|
p[8] = 0x00;
|
|
}
|
|
p[4] = l / 256;
|
|
p[5] = l & 0xFF;
|
|
Length = l + 6;
|
|
lastLength = Length;
|
|
lastData = p;
|
|
return p;
|
|
}
|
|
else {
|
|
Length = PesLength(data);
|
|
if (Length <= length) {
|
|
offset = Length; // to make sure we break out in case of garbage data
|
|
lastLength = Length;
|
|
lastData = data;
|
|
return data;
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void cTsToPes::SetRepeatLast(void)
|
|
{
|
|
repeatLast = true;
|
|
}
|
|
|
|
void cTsToPes::Reset(void)
|
|
{
|
|
length = offset = 0;
|
|
lastData = NULL;
|
|
lastLength = 0;
|
|
repeatLast = false;
|
|
}
|
|
|
|
// --- Some helper functions for debugging -----------------------------------
|
|
|
|
void BlockDump(const char *Name, const u_char *Data, int Length)
|
|
{
|
|
printf("--- %s\n", Name);
|
|
for (int i = 0; i < Length; i++) {
|
|
if (i && (i % 16) == 0)
|
|
printf("\n");
|
|
printf(" %02X", Data[i]);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
void TsDump(const char *Name, const u_char *Data, int Length)
|
|
{
|
|
printf("%s: %04X", Name, Length);
|
|
int n = min(Length, 20);
|
|
for (int i = 0; i < n; i++)
|
|
printf(" %02X", Data[i]);
|
|
if (n < Length) {
|
|
printf(" ...");
|
|
n = max(n, Length - 10);
|
|
for (n = max(n, Length - 10); n < Length; n++)
|
|
printf(" %02X", Data[n]);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
void PesDump(const char *Name, const u_char *Data, int Length)
|
|
{
|
|
TsDump(Name, Data, Length);
|
|
}
|
|
|
|
// --- cFrameDetector --------------------------------------------------------
|
|
|
|
#define EMPTY_SCANNER (0xFFFFFFFF)
|
|
|
|
cFrameDetector::cFrameDetector(int Pid, int Type)
|
|
{
|
|
SetPid(Pid, Type);
|
|
synced = false;
|
|
newPayload = newFrame = independentFrame = false;
|
|
frameTypeOffset = -1;
|
|
numPtsValues = 0;
|
|
numFrames = 0;
|
|
numIFrames = 0;
|
|
framesPerSecond = 0;
|
|
framesInPayloadUnit = framesPerPayloadUnit = 0;
|
|
payloadUnitOfFrame = 0;
|
|
scanning = false;
|
|
scanner = EMPTY_SCANNER;
|
|
}
|
|
|
|
static int CmpUint32(const void *p1, const void *p2)
|
|
{
|
|
if (*(uint32_t *)p1 < *(uint32_t *)p2) return -1;
|
|
if (*(uint32_t *)p1 > *(uint32_t *)p2) return 1;
|
|
return 0;
|
|
}
|
|
|
|
void cFrameDetector::SetPid(int Pid, int Type)
|
|
{
|
|
pid = Pid;
|
|
type = Type;
|
|
isVideo = type == 0x01 || type == 0x02 || type == 0x1B; // MPEG 1, 2 or 4
|
|
}
|
|
|
|
void cFrameDetector::Reset(void)
|
|
{
|
|
newPayload = newFrame = independentFrame = false;
|
|
frameTypeOffset = -1;
|
|
payloadUnitOfFrame = 0;
|
|
scanning = false;
|
|
scanner = EMPTY_SCANNER;
|
|
}
|
|
|
|
int cFrameDetector::Analyze(const uchar *Data, int Length)
|
|
{
|
|
int Processed = 0;
|
|
newPayload = newFrame = independentFrame = false;
|
|
while (Length >= TS_SIZE) {
|
|
if (Data[0] != TS_SYNC_BYTE) {
|
|
int Skipped = 1;
|
|
while (Skipped < Length && (Data[Skipped] != TS_SYNC_BYTE || Length - Skipped > TS_SIZE && Data[Skipped + TS_SIZE] != TS_SYNC_BYTE))
|
|
Skipped++;
|
|
esyslog("ERROR: skipped %d bytes to sync on start of TS packet", Skipped);
|
|
return Processed + Skipped;
|
|
}
|
|
if (TsHasPayload(Data) && !TsIsScrambled(Data)) {
|
|
int Pid = TsPid(Data);
|
|
if (Pid == pid) {
|
|
if (TsPayloadStart(Data)) {
|
|
if (synced && Processed)
|
|
return Processed; // flush everything before this new payload
|
|
if (framesPerSecond <= 0.0) {
|
|
// frame rate unknown, so collect a sequence of PTS values:
|
|
if (numPtsValues < MaxPtsValues && numIFrames < 2) { // collect a sequence containing at least two I-frames
|
|
const uchar *Pes = Data + TsPayloadOffset(Data);
|
|
if (numIFrames && PesHasPts(Pes)) {
|
|
ptsValues[numPtsValues] = PesGetPts(Pes);
|
|
// check for rollover:
|
|
if (numPtsValues && ptsValues[numPtsValues - 1] > 0xF0000000 && ptsValues[numPtsValues] < 0x10000000) {
|
|
dbgframes("#");
|
|
numPtsValues = 0;
|
|
numIFrames = 0;
|
|
numFrames = 0;
|
|
}
|
|
else
|
|
numPtsValues++;
|
|
}
|
|
}
|
|
else {
|
|
// find the smallest PTS delta:
|
|
qsort(ptsValues, numPtsValues, sizeof(uint32_t), CmpUint32);
|
|
numPtsValues--;
|
|
for (int i = 0; i < numPtsValues; i++)
|
|
ptsValues[i] = ptsValues[i + 1] - ptsValues[i];
|
|
qsort(ptsValues, numPtsValues, sizeof(uint32_t), CmpUint32);
|
|
uint32_t Delta = ptsValues[0];
|
|
// determine frame info:
|
|
if (isVideo) {
|
|
if (abs(Delta - 3600) <= 1)
|
|
framesPerSecond = 25.0;
|
|
else if (Delta % 3003 == 0)
|
|
framesPerSecond = 30.0 / 1.001;
|
|
else if (abs(Delta - 1800) <= 1) {
|
|
if (numFrames > 50) {
|
|
// this is a "best guess": if there are more than 50 frames between two I-frames, we assume each "frame" actually contains a "field", so two "fields" make one "frame"
|
|
framesPerSecond = 25.0;
|
|
framesPerPayloadUnit = -2;
|
|
}
|
|
else
|
|
framesPerSecond = 50.0;
|
|
}
|
|
else if (Delta == 1501)
|
|
if (numFrames > 50) {
|
|
// this is a "best guess": if there are more than 50 frames between two I-frames, we assume each "frame" actually contains a "field", so two "fields" make one "frame"
|
|
framesPerSecond = 30.0 / 1.001;
|
|
framesPerPayloadUnit = -2;
|
|
}
|
|
else
|
|
framesPerSecond = 60.0 / 1.001;
|
|
else {
|
|
framesPerSecond = DEFAULTFRAMESPERSECOND;
|
|
dsyslog("unknown frame delta (%d), assuming %5.2f fps", Delta, DEFAULTFRAMESPERSECOND);
|
|
}
|
|
}
|
|
else // audio
|
|
framesPerSecond = 90000.0 / Delta; // PTS of audio frames is always increasing
|
|
dbgframes("\nDelta = %d FPS = %5.2f FPPU = %d NF = %d\n", Delta, framesPerSecond, framesPerPayloadUnit, numFrames);
|
|
}
|
|
}
|
|
scanner = EMPTY_SCANNER;
|
|
scanning = true;
|
|
}
|
|
if (scanning) {
|
|
int PayloadOffset = TsPayloadOffset(Data);
|
|
if (TsPayloadStart(Data)) {
|
|
if (synced && Processed)
|
|
return Processed; // flush everything before this new payload
|
|
newPayload = true;
|
|
scanner = EMPTY_SCANNER;
|
|
PayloadOffset += PesPayloadOffset(Data + PayloadOffset);
|
|
if (!framesPerPayloadUnit)
|
|
framesPerPayloadUnit = framesInPayloadUnit;
|
|
if (DebugFrames && !synced)
|
|
dbgframes("/");
|
|
}
|
|
for (int i = PayloadOffset; scanning && i < TS_SIZE; i++) {
|
|
if (frameTypeOffset < 0) {
|
|
scanner <<= 8;
|
|
scanner |= Data[i];
|
|
}
|
|
else
|
|
frameTypeOffset += PayloadOffset;
|
|
switch (type) {
|
|
case 0x01: // MPEG 1 video
|
|
case 0x02: // MPEG 2 video
|
|
if (scanner == 0x00000100) { // Picture Start Code
|
|
if (frameTypeOffset < 0) {
|
|
frameTypeOffset = i + 2;
|
|
if (frameTypeOffset >= TS_SIZE) { // the byte to check is in the next TS packet
|
|
frameTypeOffset -= TS_SIZE;
|
|
if (!synced)
|
|
dbgframes("%d>", frameTypeOffset);
|
|
break;
|
|
}
|
|
}
|
|
scanner = EMPTY_SCANNER;
|
|
newFrame = true;
|
|
uchar FrameType = (Data[frameTypeOffset] >> 3) & 0x07;
|
|
frameTypeOffset = -1;
|
|
independentFrame = FrameType == 1; // I-Frame
|
|
if (synced) {
|
|
if (framesPerPayloadUnit <= 1)
|
|
scanning = false;
|
|
}
|
|
else {
|
|
framesInPayloadUnit++;
|
|
if (independentFrame)
|
|
numIFrames++;
|
|
if (numIFrames == 1)
|
|
numFrames++;
|
|
dbgframes("%u ", FrameType);
|
|
}
|
|
if (synced)
|
|
return Processed + TS_SIZE; // flag this new frame
|
|
}
|
|
break;
|
|
case 0x1B: // MPEG 4 video
|
|
if (scanner == 0x00000109) { // Access Unit Delimiter
|
|
if (frameTypeOffset < 0) {
|
|
frameTypeOffset = i + 1;
|
|
if (frameTypeOffset >= TS_SIZE) { // the byte to check is in the next TS packet
|
|
frameTypeOffset -= TS_SIZE;
|
|
if (!synced)
|
|
dbgframes("%d>", frameTypeOffset);
|
|
break;
|
|
}
|
|
}
|
|
scanner = EMPTY_SCANNER;
|
|
newFrame = true;
|
|
uchar FrameType = Data[frameTypeOffset];
|
|
frameTypeOffset = -1;
|
|
independentFrame = FrameType == 0x10;
|
|
if (synced) {
|
|
if (framesPerPayloadUnit < 0) {
|
|
payloadUnitOfFrame = (payloadUnitOfFrame + 1) % -framesPerPayloadUnit;
|
|
if (payloadUnitOfFrame != 0 && independentFrame)
|
|
payloadUnitOfFrame = 0;
|
|
if (payloadUnitOfFrame)
|
|
newFrame = false;
|
|
}
|
|
if (framesPerPayloadUnit <= 1)
|
|
scanning = false;
|
|
}
|
|
else {
|
|
framesInPayloadUnit++;
|
|
if (independentFrame)
|
|
numIFrames++;
|
|
if (numIFrames == 1)
|
|
numFrames++;
|
|
dbgframes("%02X ", FrameType);
|
|
}
|
|
if (synced)
|
|
return Processed + TS_SIZE; // flag this new frame
|
|
}
|
|
break;
|
|
case 0x04: // MPEG audio
|
|
case 0x06: // AC3 audio
|
|
if (synced && Processed)
|
|
return Processed;
|
|
newFrame = true;
|
|
independentFrame = true;
|
|
if (!synced) {
|
|
framesInPayloadUnit = 1;
|
|
if (TsPayloadStart(Data))
|
|
numIFrames++;
|
|
}
|
|
scanning = false;
|
|
break;
|
|
default: esyslog("ERROR: unknown stream type %d (PID %d) in frame detector", type, pid);
|
|
pid = 0; // let's just ignore any further data
|
|
}
|
|
}
|
|
if (!synced && framesPerSecond > 0.0 && independentFrame) {
|
|
synced = true;
|
|
dbgframes("*\n");
|
|
Reset();
|
|
return Processed + TS_SIZE;
|
|
}
|
|
}
|
|
}
|
|
else if (Pid == PATPID && synced && Processed)
|
|
return Processed; // allow the caller to see any PAT packets
|
|
}
|
|
Data += TS_SIZE;
|
|
Length -= TS_SIZE;
|
|
Processed += TS_SIZE;
|
|
}
|
|
return Processed;
|
|
}
|