mirror of
https://github.com/vdr-projects/vdr.git
synced 2025-03-01 10:50:46 +00:00
bd61fee1e9
Original announce message:
VDR developer version 1.7.19 is now available at
ftp://ftp.tvdr.de/vdr/Developer/vdr-1.7.19.tar.bz2
A 'diff' against the previous version is available at
ftp://ftp.tvdr.de/vdr/Developer/vdr-1.7.18-1.7.19.diff
MD5 checksums:
1eb04ecdc2b11ab8641ebfaa2cb93f42 vdr-1.7.19.tar.bz2
db16ce7bb51e0db837ed56ef4744a67e vdr-1.7.18-1.7.19.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 introduces 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.
Since apparently the various frontend drivers return different maximum
values in their FE_READ_SIGNAL_STRENGTH and FE_READ_SNR functions (some
deliver a value in the range 0x0000...0xFFFF, while others return values
as "dB/10" or "dBm/10" (the latter with an offset to make the value positive,
since the parameter is unsigned), the functions cDvbTuner::GetSignalStrength()
and cDvbTuner::GetSignalQuality() use the device's "subsystem ID" to
map these values into the range 0...100, which is the normalized return
value of these functions.
Take a look at these two functions and maybe remove the comment characters
from the lines
//#define DEBUG_SIGNALSTRENGTH
//#define DEBUG_SIGNALQUALITY
in dvbdevice.c to get some debug output if your device doesn't return any
directly useful values and may have to be added appropriately to the
'switch (subsystemId)' statement.
The channel display of the 'sttng' skin uses these values to implement
a signal strength/quality display.
From the HISTORY file:
- Fixed cString's operator=(const char *String) in case the given string is the
same as the existing one (thanks to Dirk Leber).
- Avoiding a gcc 4.6 compiler error in the skincurses plugin (thanks to Tobias Grimm).
- TsGetPayload() now checks if there actually is a payload in the given TS packet
(reported by Dirk Leber).
- Now sorting the source file names in the call to xgettext, to make sure the results
are not dependent on the sequence of the files.
Plugin authors may want to change the line containing the xgettext call in their
Makefile accordingly by changing "$^" to "`ls $^`".
- The primary device is now only avoided for recording if it is an old SD full
featured card. This is done through the new function cDevice::AvoidRecording().
- Subtitle PIDs are now also decrypted (thanks to Reinhard Nissl).
- Fixed a possible race condition in cDiseqc::Execute() (reported by Marco Göbenich).
The return value of cDiseqcs::Get() is now const, so plugin authors may need to
adjust their code if they use this function.
- The new functions cDevice::SignalStrength() and cDevice::SignalQuality() can be
used to determine the signal strength and quality of a given device (thanks to
Rolf Ahrenberg for some input on how to use BER and UNC values to generate a
"quality" value).
- The 'sttng' skin now displays two colored bars at the bottom of the channel display,
indicating the strength (upper bar) and quality (lower bar) of the received signal.
The number to the left of these bars indicates the actual device the current
channel is being received with.
- Fixed detecting frames in case the Picture Start Code or Access Unit Delimiter
extends over TS packet boundaries (reported by Johan Andersson).
In order to fix this, the semantics of cFrameDetector had to be changed a little.
See cRecorder::Action() and cIndexFileGenerator::Action() on how to use the new
cFrameDetector::NewPayload() function.
- The frame detector now only starts collecting PTS values after it has seen the
first I-frame, otherwise it might get MaxPtsValues values and stop analyzing
even though the incoming data is still garbage (reported by Derek Kelly).
- The info file of a recording is now only overwritten with a new fps value if
that new value is not the default value (thanks to Derek Kelly for reporting a
problem with the fps value being overwritten in case a recording was interrupted
and resumed, and the fps value could not be determined after resuming recording).
- The initial channel is now stored by the channel ID in the setup.conf file, in
order to avoid problems in case channels are reordered or deleted (reported by
Lars Bläser).
- Added support for "content identifier descriptor" and "default authority descriptor"
to 'libsi' (thanks to Dave Pickles).
1026 lines
37 KiB
C
1026 lines
37 KiB
C
/*
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* remux.c: Tools for detecting frames and handling PAT/PMT
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*
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* See the main source file 'vdr.c' for copyright information and
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* how to reach the author.
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*
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* $Id: remux.c 2.57 2011/06/12 14:24:09 kls Exp $
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*/
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#include "remux.h"
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#include "device.h"
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#include "libsi/si.h"
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#include "libsi/section.h"
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#include "libsi/descriptor.h"
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#include "recording.h"
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#include "shutdown.h"
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#include "tools.h"
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// Set these to 'true' for debug output:
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static bool DebugPatPmt = false;
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static bool DebugFrames = false;
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#define dbgpatpmt(a...) if (DebugPatPmt) fprintf(stderr, a)
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#define dbgframes(a...) if (DebugFrames) fprintf(stderr, a)
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ePesHeader AnalyzePesHeader(const uchar *Data, int Count, int &PesPayloadOffset, bool *ContinuationHeader)
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{
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if (Count < 7)
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return phNeedMoreData; // too short
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if ((Data[6] & 0xC0) == 0x80) { // MPEG 2
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if (Count < 9)
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return phNeedMoreData; // too short
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PesPayloadOffset = 6 + 3 + Data[8];
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if (Count < PesPayloadOffset)
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return phNeedMoreData; // too short
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if (ContinuationHeader)
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*ContinuationHeader = ((Data[6] == 0x80) && !Data[7] && !Data[8]);
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return phMPEG2; // MPEG 2
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}
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// check for MPEG 1 ...
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PesPayloadOffset = 6;
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// skip up to 16 stuffing bytes
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for (int i = 0; i < 16; i++) {
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if (Data[PesPayloadOffset] != 0xFF)
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break;
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if (Count <= ++PesPayloadOffset)
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return phNeedMoreData; // too short
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}
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// skip STD_buffer_scale/size
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if ((Data[PesPayloadOffset] & 0xC0) == 0x40) {
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PesPayloadOffset += 2;
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if (Count <= PesPayloadOffset)
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return phNeedMoreData; // too short
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}
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if (ContinuationHeader)
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*ContinuationHeader = false;
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if ((Data[PesPayloadOffset] & 0xF0) == 0x20) {
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// skip PTS only
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PesPayloadOffset += 5;
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}
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else if ((Data[PesPayloadOffset] & 0xF0) == 0x30) {
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// skip PTS and DTS
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PesPayloadOffset += 10;
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}
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else if (Data[PesPayloadOffset] == 0x0F) {
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// continuation header
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PesPayloadOffset++;
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if (ContinuationHeader)
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*ContinuationHeader = true;
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}
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else
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return phInvalid; // unknown
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if (Count < PesPayloadOffset)
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return phNeedMoreData; // too short
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return phMPEG1; // MPEG 1
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}
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#define VIDEO_STREAM_S 0xE0
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// --- cRemux ----------------------------------------------------------------
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void cRemux::SetBrokenLink(uchar *Data, int Length)
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{
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int PesPayloadOffset = 0;
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if (AnalyzePesHeader(Data, Length, PesPayloadOffset) >= phMPEG1 && (Data[3] & 0xF0) == VIDEO_STREAM_S) {
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for (int i = PesPayloadOffset; i < Length - 7; i++) {
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if (Data[i] == 0 && Data[i + 1] == 0 && Data[i + 2] == 1 && Data[i + 3] == 0xB8) {
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if (!(Data[i + 7] & 0x40)) // set flag only if GOP is not closed
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Data[i + 7] |= 0x20;
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return;
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}
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}
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dsyslog("SetBrokenLink: no GOP header found in video packet");
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}
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else
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dsyslog("SetBrokenLink: no video packet in frame");
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}
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// --- Some TS handling tools ------------------------------------------------
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int64_t TsGetPts(const uchar *p, int l)
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{
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// Find the first packet with a PTS and use it:
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while (l > 0) {
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const uchar *d = p;
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if (TsPayloadStart(d) && TsGetPayload(&d) && PesHasPts(d))
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return PesGetPts(d);
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p += TS_SIZE;
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l -= TS_SIZE;
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}
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return -1;
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}
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void TsSetTeiOnBrokenPackets(uchar *p, int l)
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{
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bool Processed[MAXPID] = { false };
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while (l >= TS_SIZE) {
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if (*p != TS_SYNC_BYTE)
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break;
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int Pid = TsPid(p);
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if (!Processed[Pid]) {
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if (!TsPayloadStart(p))
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p[1] |= TS_ERROR;
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else
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Processed[Pid] = true;
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}
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l -= TS_SIZE;
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p += TS_SIZE;
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}
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}
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// --- cPatPmtGenerator ------------------------------------------------------
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cPatPmtGenerator::cPatPmtGenerator(const cChannel *Channel)
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{
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numPmtPackets = 0;
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patCounter = pmtCounter = 0;
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patVersion = pmtVersion = 0;
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pmtPid = 0;
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esInfoLength = NULL;
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SetChannel(Channel);
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}
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void cPatPmtGenerator::IncCounter(int &Counter, uchar *TsPacket)
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{
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TsPacket[3] = (TsPacket[3] & 0xF0) | Counter;
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if (++Counter > 0x0F)
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Counter = 0x00;
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}
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void cPatPmtGenerator::IncVersion(int &Version)
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{
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if (++Version > 0x1F)
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Version = 0x00;
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}
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void cPatPmtGenerator::IncEsInfoLength(int Length)
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{
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if (esInfoLength) {
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Length += ((*esInfoLength & 0x0F) << 8) | *(esInfoLength + 1);
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*esInfoLength = 0xF0 | (Length >> 8);
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*(esInfoLength + 1) = Length;
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}
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}
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int cPatPmtGenerator::MakeStream(uchar *Target, uchar Type, int Pid)
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{
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int i = 0;
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Target[i++] = Type; // stream type
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Target[i++] = 0xE0 | (Pid >> 8); // dummy (3), pid hi (5)
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Target[i++] = Pid; // pid lo
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esInfoLength = &Target[i];
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Target[i++] = 0xF0; // dummy (4), ES info length hi
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Target[i++] = 0x00; // ES info length lo
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return i;
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}
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int cPatPmtGenerator::MakeAC3Descriptor(uchar *Target, uchar Type)
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{
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int i = 0;
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Target[i++] = Type;
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Target[i++] = 0x01; // length
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Target[i++] = 0x00;
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IncEsInfoLength(i);
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return i;
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}
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int cPatPmtGenerator::MakeSubtitlingDescriptor(uchar *Target, const char *Language, uchar SubtitlingType, uint16_t CompositionPageId, uint16_t AncillaryPageId)
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{
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int i = 0;
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Target[i++] = SI::SubtitlingDescriptorTag;
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Target[i++] = 0x08; // length
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Target[i++] = *Language++;
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Target[i++] = *Language++;
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Target[i++] = *Language++;
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Target[i++] = SubtitlingType;
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Target[i++] = CompositionPageId >> 8;
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Target[i++] = CompositionPageId & 0xFF;
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Target[i++] = AncillaryPageId >> 8;
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Target[i++] = AncillaryPageId & 0xFF;
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IncEsInfoLength(i);
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return i;
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}
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int cPatPmtGenerator::MakeLanguageDescriptor(uchar *Target, const char *Language)
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{
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int i = 0;
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Target[i++] = SI::ISO639LanguageDescriptorTag;
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int Length = i++;
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Target[Length] = 0x00; // length
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for (const char *End = Language + strlen(Language); Language < End; ) {
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Target[i++] = *Language++;
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Target[i++] = *Language++;
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Target[i++] = *Language++;
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Target[i++] = 0x00; // audio type
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Target[Length] += 0x04; // length
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if (*Language == '+')
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Language++;
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}
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IncEsInfoLength(i);
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return i;
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}
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int cPatPmtGenerator::MakeCRC(uchar *Target, const uchar *Data, int Length)
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{
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int crc = SI::CRC32::crc32((const char *)Data, Length, 0xFFFFFFFF);
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int i = 0;
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Target[i++] = crc >> 24;
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Target[i++] = crc >> 16;
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Target[i++] = crc >> 8;
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Target[i++] = crc;
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return i;
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}
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#define P_TSID 0x8008 // pseudo TS ID
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#define P_PMT_PID 0x0084 // pseudo PMT pid
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#define MAXPID 0x2000 // the maximum possible number of pids
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void cPatPmtGenerator::GeneratePmtPid(const cChannel *Channel)
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{
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bool Used[MAXPID] = { false };
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#define SETPID(p) { if ((p) >= 0 && (p) < MAXPID) Used[p] = true; }
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#define SETPIDS(l) { const int *p = l; while (*p) { SETPID(*p); p++; } }
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SETPID(Channel->Vpid());
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SETPID(Channel->Ppid());
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SETPID(Channel->Tpid());
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SETPIDS(Channel->Apids());
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SETPIDS(Channel->Dpids());
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SETPIDS(Channel->Spids());
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for (pmtPid = P_PMT_PID; Used[pmtPid]; pmtPid++)
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;
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}
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void cPatPmtGenerator::GeneratePat(void)
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{
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memset(pat, 0xFF, sizeof(pat));
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uchar *p = pat;
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int i = 0;
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p[i++] = TS_SYNC_BYTE; // TS indicator
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p[i++] = TS_PAYLOAD_START | (PATPID >> 8); // flags (3), pid hi (5)
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p[i++] = PATPID & 0xFF; // pid lo
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p[i++] = 0x10; // flags (4), continuity counter (4)
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p[i++] = 0x00; // pointer field (payload unit start indicator is set)
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int PayloadStart = i;
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p[i++] = 0x00; // table id
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p[i++] = 0xB0; // section syntax indicator (1), dummy (3), section length hi (4)
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int SectionLength = i;
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p[i++] = 0x00; // section length lo (filled in later)
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p[i++] = P_TSID >> 8; // TS id hi
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p[i++] = P_TSID & 0xFF; // TS id lo
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p[i++] = 0xC1 | (patVersion << 1); // dummy (2), version number (5), current/next indicator (1)
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p[i++] = 0x00; // section number
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p[i++] = 0x00; // last section number
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p[i++] = pmtPid >> 8; // program number hi
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p[i++] = pmtPid & 0xFF; // program number lo
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p[i++] = 0xE0 | (pmtPid >> 8); // dummy (3), PMT pid hi (5)
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p[i++] = pmtPid & 0xFF; // PMT pid lo
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pat[SectionLength] = i - SectionLength - 1 + 4; // -2 = SectionLength storage, +4 = length of CRC
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MakeCRC(pat + i, pat + PayloadStart, i - PayloadStart);
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IncVersion(patVersion);
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}
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void cPatPmtGenerator::GeneratePmt(const cChannel *Channel)
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{
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// generate the complete PMT section:
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uchar buf[MAX_SECTION_SIZE];
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memset(buf, 0xFF, sizeof(buf));
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numPmtPackets = 0;
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if (Channel) {
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int Vpid = Channel->Vpid();
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int Ppid = Channel->Ppid();
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uchar *p = buf;
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int i = 0;
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p[i++] = 0x02; // table id
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int SectionLength = i;
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p[i++] = 0xB0; // section syntax indicator (1), dummy (3), section length hi (4)
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p[i++] = 0x00; // section length lo (filled in later)
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p[i++] = pmtPid >> 8; // program number hi
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p[i++] = pmtPid & 0xFF; // program number lo
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p[i++] = 0xC1 | (pmtVersion << 1); // dummy (2), version number (5), current/next indicator (1)
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p[i++] = 0x00; // section number
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p[i++] = 0x00; // last section number
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p[i++] = 0xE0 | (Ppid >> 8); // dummy (3), PCR pid hi (5)
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p[i++] = Ppid; // PCR pid lo
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p[i++] = 0xF0; // dummy (4), program info length hi (4)
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p[i++] = 0x00; // program info length lo
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if (Vpid)
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i += MakeStream(buf + i, Channel->Vtype(), Vpid);
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for (int n = 0; Channel->Apid(n); n++) {
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i += MakeStream(buf + i, Channel->Atype(n), Channel->Apid(n));
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const char *Alang = Channel->Alang(n);
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i += MakeLanguageDescriptor(buf + i, Alang);
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}
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for (int n = 0; Channel->Dpid(n); n++) {
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i += MakeStream(buf + i, 0x06, Channel->Dpid(n));
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i += MakeAC3Descriptor(buf + i, Channel->Dtype(n));
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i += MakeLanguageDescriptor(buf + i, Channel->Dlang(n));
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}
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for (int n = 0; Channel->Spid(n); n++) {
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i += MakeStream(buf + i, 0x06, Channel->Spid(n));
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i += MakeSubtitlingDescriptor(buf + i, Channel->Slang(n), Channel->SubtitlingType(n), Channel->CompositionPageId(n), Channel->AncillaryPageId(n));
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}
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int sl = i - SectionLength - 2 + 4; // -2 = SectionLength storage, +4 = length of CRC
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buf[SectionLength] |= (sl >> 8) & 0x0F;
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buf[SectionLength + 1] = sl;
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MakeCRC(buf + i, buf, i);
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// split the PMT section into several TS packets:
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uchar *q = buf;
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bool pusi = true;
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while (i > 0) {
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uchar *p = pmt[numPmtPackets++];
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int j = 0;
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p[j++] = TS_SYNC_BYTE; // TS indicator
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p[j++] = (pusi ? TS_PAYLOAD_START : 0x00) | (pmtPid >> 8); // flags (3), pid hi (5)
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p[j++] = pmtPid & 0xFF; // pid lo
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p[j++] = 0x10; // flags (4), continuity counter (4)
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if (pusi) {
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p[j++] = 0x00; // pointer field (payload unit start indicator is set)
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pusi = false;
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}
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int l = TS_SIZE - j;
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memcpy(p + j, q, l);
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q += l;
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i -= l;
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}
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IncVersion(pmtVersion);
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}
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}
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void cPatPmtGenerator::SetVersions(int PatVersion, int PmtVersion)
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{
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patVersion = PatVersion & 0x1F;
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pmtVersion = PmtVersion & 0x1F;
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}
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void cPatPmtGenerator::SetChannel(const cChannel *Channel)
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{
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if (Channel) {
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GeneratePmtPid(Channel);
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GeneratePat();
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GeneratePmt(Channel);
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}
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}
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uchar *cPatPmtGenerator::GetPat(void)
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{
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IncCounter(patCounter, pat);
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return pat;
|
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}
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|
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uchar *cPatPmtGenerator::GetPmt(int &Index)
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{
|
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if (Index < numPmtPackets) {
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IncCounter(pmtCounter, pmt[Index]);
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return pmt[Index++];
|
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}
|
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return NULL;
|
|
}
|
|
|
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// --- cPatPmtParser ---------------------------------------------------------
|
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|
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cPatPmtParser::cPatPmtParser(bool UpdatePrimaryDevice)
|
|
{
|
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updatePrimaryDevice = UpdatePrimaryDevice;
|
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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;
|
|
}
|