vdr-plugin-streamdev/server/livestreamer.c

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#include <assert.h>
#include <libsi/section.h>
#include <libsi/descriptor.h>
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#include "remux/ts2ps.h"
#include "remux/ts2pes.h"
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#include "remux/ts2es.h"
#include "remux/extern.h"
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#include <vdr/ringbuffer.h>
#include "server/livestreamer.h"
#include "common.h"
using namespace Streamdev;
// --- cStreamdevLiveReceiver -------------------------------------------------
class cStreamdevLiveReceiver: public cReceiver {
friend class cStreamdevStreamer;
private:
cStreamdevLiveStreamer *m_Streamer;
protected:
virtual void Receive(uchar *Data, int Length);
public:
cStreamdevLiveReceiver(cStreamdevLiveStreamer *Streamer, const cChannel *Channel, int Priority, const int *Pids);
virtual ~cStreamdevLiveReceiver();
};
cStreamdevLiveReceiver::cStreamdevLiveReceiver(cStreamdevLiveStreamer *Streamer, const cChannel *Channel, int Priority, const int *Pids):
cReceiver(Channel, Priority),
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m_Streamer(Streamer)
{
// clears all PIDs but channel remains set
SetPids(NULL);
AddPids(Pids);
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}
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cStreamdevLiveReceiver::~cStreamdevLiveReceiver()
{
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Dprintf("Killing live receiver\n");
Detach();
}
void cStreamdevLiveReceiver::Receive(uchar *Data, int Length) {
m_Streamer->Receive(Data, Length);
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}
// --- cStreamdevPatFilter ----------------------------------------------------
class cStreamdevPatFilter : public cFilter {
private:
int pmtPid;
int pmtSid;
int pmtVersion;
uchar tspat_buf[TS_SIZE];
cStreamdevBuffer siBuffer;
const cChannel *m_Channel;
cStreamdevLiveStreamer *m_Streamer;
virtual void Process(u_short Pid, u_char Tid, const u_char *Data, int Length);
int GetPid(SI::PMT::Stream& stream);
public:
cStreamdevPatFilter(cStreamdevLiveStreamer *Streamer, const cChannel *Channel);
uchar* Get(int &Count) { return siBuffer.Get(Count); }
void Del(int Count) { return siBuffer.Del(Count); }
};
cStreamdevPatFilter::cStreamdevPatFilter(cStreamdevLiveStreamer *Streamer, const cChannel *Channel): siBuffer(10 * TS_SIZE, TS_SIZE)
{
Dprintf("cStreamdevPatFilter(\"%s\")\n", Channel->Name());
assert(Streamer);
m_Channel = Channel;
m_Streamer = Streamer;
pmtPid = 0;
pmtSid = 0;
pmtVersion = -1;
Set(0x00, 0x00); // PAT
// initialize PAT buffer. Only some values are dynamic (see comments)
memset(tspat_buf, 0xff, TS_SIZE);
tspat_buf[0] = TS_SYNC_BYTE; // Transport packet header sunchronization byte (1000011 = 0x47h)
tspat_buf[1] = 0x40; // Set payload unit start indicator bit
tspat_buf[2] = 0x0; // PID
tspat_buf[3] = 0x10; // Set payload flag, DYNAMIC: Continuity counter
tspat_buf[4] = 0x0; // SI pointer field
tspat_buf[5] = 0x0; // PAT table id
tspat_buf[6] = 0xb0; // Section syntax indicator bit and reserved bits set
tspat_buf[7] = 12 + 1; // Section length (12 bit): PAT_TABLE_LEN + 1
tspat_buf[8] = 0; // DYNAMIC: Transport stream ID (bits 8-15)
tspat_buf[9] = 0; // DYNAMIC: Transport stream ID (bits 0-7)
tspat_buf[10] = 0xc0; // Reserved, DYNAMIC: Version number, DYNAMIC: Current next indicator
tspat_buf[11] = 0x0; // Section number
tspat_buf[12] = 0x0; // Last section number
tspat_buf[13] = 0; // DYNAMIC: Program number (bits 8-15)
tspat_buf[14] = 0; // DYNAMIC: Program number (bits 0-7)
tspat_buf[15] = 0xe0; // Reserved, DYNAMIC: Network ID (bits 8-12)
tspat_buf[16] = 0; // DYNAMIC: Network ID (bits 0-7)
tspat_buf[17] = 0; // DYNAMIC: Checksum
tspat_buf[18] = 0; // DYNAMIC: Checksum
tspat_buf[19] = 0; // DYNAMIC: Checksum
tspat_buf[20] = 0; // DYNAMIC: Checksum
}
static const char * const psStreamTypes[] = {
"UNKNOWN",
"ISO/IEC 11172 Video",
"ISO/IEC 13818-2 Video",
"ISO/IEC 11172 Audio",
"ISO/IEC 13818-3 Audio",
"ISO/IEC 13818-1 Privete sections",
"ISO/IEC 13818-1 Private PES data",
"ISO/IEC 13512 MHEG",
"ISO/IEC 13818-1 Annex A DSM CC",
"0x09",
"ISO/IEC 13818-6 Multiprotocol encapsulation",
"ISO/IEC 13818-6 DSM-CC U-N Messages",
"ISO/IEC 13818-6 Stream Descriptors",
"ISO/IEC 13818-6 Sections (any type, including private data)",
"ISO/IEC 13818-1 auxiliary",
"ISO/IEC 13818-7 Audio with ADTS transport sytax",
"ISO/IEC 14496-2 Visual (MPEG-4)",
"ISO/IEC 14496-3 Audio with LATM transport syntax",
"0x12", "0x13", "0x14", "0x15", "0x16", "0x17", "0x18", "0x19", "0x1a",
"ISO/IEC 14496-10 Video (MPEG-4 part 10/AVC, aka H.264)",
"",
};
int cStreamdevPatFilter::GetPid(SI::PMT::Stream& stream)
{
SI::Descriptor *d;
if (!stream.getPid())
return 0;
switch (stream.getStreamType()) {
case 0x01: // ISO/IEC 11172 Video
case 0x02: // ISO/IEC 13818-2 Video
case 0x03: // ISO/IEC 11172 Audio
case 0x04: // ISO/IEC 13818-3 Audio
#if 0
case 0x07: // ISO/IEC 13512 MHEG
case 0x08: // ISO/IEC 13818-1 Annex A DSM CC
case 0x0a: // ISO/IEC 13818-6 Multiprotocol encapsulation
case 0x0b: // ISO/IEC 13818-6 DSM-CC U-N Messages
case 0x0c: // ISO/IEC 13818-6 Stream Descriptors
case 0x0d: // ISO/IEC 13818-6 Sections (any type, including private data)
case 0x0e: // ISO/IEC 13818-1 auxiliary
#endif
case 0x0f: // ISO/IEC 13818-7 Audio with ADTS transport syntax
case 0x10: // ISO/IEC 14496-2 Visual (MPEG-4)
case 0x11: // ISO/IEC 14496-3 Audio with LATM transport syntax
case 0x1b: // ISO/IEC 14496-10 Video (MPEG-4 part 10/AVC, aka H.264)
Dprintf("cStreamdevPatFilter PMT scanner adding PID %d (%s)\n",
stream.getPid(), psStreamTypes[stream.getStreamType()]);
return stream.getPid();
case 0x05: // ISO/IEC 13818-1 private sections
case 0x06: // ISO/IEC 13818-1 PES packets containing private data
for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
switch (d->getDescriptorTag()) {
case SI::AC3DescriptorTag:
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case SI::EnhancedAC3DescriptorTag:
Dprintf("cStreamdevPatFilter PMT scanner: adding PID %d (%s) %s\n",
stream.getPid(), psStreamTypes[stream.getStreamType()], "AC3");
delete d;
return stream.getPid();
case SI::TeletextDescriptorTag:
Dprintf("cStreamdevPatFilter PMT scanner: adding PID %d (%s) %s\n",
stream.getPid(), psStreamTypes[stream.getStreamType()], "Teletext");
delete d;
return stream.getPid();
case SI::SubtitlingDescriptorTag:
Dprintf("cStreamdevPatFilter PMT scanner: adding PID %d (%s) %s\n",
stream.getPid(), psStreamTypes[stream.getStreamType()], "DVBSUB");
delete d;
return stream.getPid();
default:
Dprintf("cStreamdevPatFilter PMT scanner: NOT adding PID %d (%s) %s\n",
stream.getPid(), psStreamTypes[stream.getStreamType()], "UNKNOWN");
break;
}
delete d;
}
break;
default:
/* This following section handles all the cases where the audio track
* info is stored in PMT user info with stream id >= 0x80
* we check the registration format identifier to see if it
* holds "AC-3"
*/
if (stream.getStreamType() >= 0x80) {
bool found = false;
for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
switch (d->getDescriptorTag()) {
case SI::RegistrationDescriptorTag:
/* unfortunately libsi does not implement RegistrationDescriptor */
if (d->getLength() >= 4) {
found = true;
SI::CharArray rawdata = d->getData();
if (/*rawdata[0] == 5 && rawdata[1] >= 4 && */
rawdata[2] == 'A' && rawdata[3] == 'C' &&
rawdata[4] == '-' && rawdata[5] == '3') {
isyslog("cStreamdevPatFilter PMT scanner:"
"Adding pid %d (type 0x%x) RegDesc len %d (%c%c%c%c)",
stream.getPid(), stream.getStreamType(),
d->getLength(), rawdata[2], rawdata[3],
rawdata[4], rawdata[5]);
delete d;
return stream.getPid();
}
}
break;
default:
break;
}
delete d;
}
if(!found) {
isyslog("Adding pid %d (type 0x%x) RegDesc not found -> assume AC-3",
stream.getPid(), stream.getStreamType());
return stream.getPid();
}
}
Dprintf("cStreamdevPatFilter PMT scanner: NOT adding PID %d (%s) %s\n",
stream.getPid(), psStreamTypes[stream.getStreamType()<0x1c?stream.getStreamType():0], "UNKNOWN");
break;
}
return 0;
}
void cStreamdevPatFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
{
if (Pid == 0x00) {
if (Tid == 0x00) {
SI::PAT pat(Data, false);
if (!pat.CheckCRCAndParse())
return;
SI::PAT::Association assoc;
for (SI::Loop::Iterator it; pat.associationLoop.getNext(assoc, it); ) {
if (!assoc.isNITPid()) {
const cChannel *Channel = Channels.GetByServiceID(Source(), Transponder(), assoc.getServiceId());
if (Channel && (Channel == m_Channel)) {
int prevPmtPid = pmtPid;
if (0 != (pmtPid = assoc.getPid())) {
Dprintf("cStreamdevPatFilter: PMT pid for channel %s: %d\n", Channel->Name(), pmtPid);
pmtSid = assoc.getServiceId();
// repack PAT to TS frame and send to client
int ts_id;
unsigned int crc, i, len;
uint8_t *tmp;
static uint8_t ccounter = 0;
ccounter = (ccounter + 1) % 16;
ts_id = Channel->Tid(); // Get transport stream id of the channel
tspat_buf[3] = 0x10 | ccounter; // Set payload flag, Continuity counter
tspat_buf[8] = (ts_id >> 8); // Transport stream ID (bits 8-15)
tspat_buf[9] = (ts_id & 0xff); // Transport stream ID (bits 0-7)
tspat_buf[10] = 0xc0 | ((pat.getVersionNumber() << 1) & 0x3e) |
pat.getCurrentNextIndicator();// Version number, Current next indicator
tspat_buf[13] = (pmtSid >> 8); // Program number (bits 8-15)
tspat_buf[14] = (pmtSid & 0xff); // Program number (bits 0-7)
tspat_buf[15] = 0xe0 | (pmtPid >> 8); // Network ID (bits 8-12)
tspat_buf[16] = (pmtPid & 0xff); // Network ID (bits 0-7)
crc = 0xffffffff;
len = 12; // PAT_TABLE_LEN
tmp = &tspat_buf[4 + 1]; // TS_HDR_LEN + 1
while (len--) {
crc ^= *tmp++ << 24;
for (i = 0; i < 8; i++)
crc = (crc << 1) ^ ((crc & 0x80000000) ? 0x04c11db7 : 0); // CRC32POLY
}
tspat_buf[17] = crc >> 24 & 0xff; // Checksum
tspat_buf[18] = crc >> 16 & 0xff; // Checksum
tspat_buf[19] = crc >> 8 & 0xff; // Checksum
tspat_buf[20] = crc & 0xff; // Checksum
int written = siBuffer.PutTS(tspat_buf, TS_SIZE);
if (written != TS_SIZE)
siBuffer.ReportOverflow(TS_SIZE - written);
if (pmtPid != prevPmtPid) {
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m_Streamer->SetPid(pmtPid, true);
Add(pmtPid, 0x02);
pmtVersion = -1;
}
return;
}
}
}
}
}
} else if (Pid == pmtPid && Tid == SI::TableIdPMT && Source() && Transponder()) {
SI::PMT pmt(Data, false);
if (!pmt.CheckCRCAndParse())
return;
if (pmt.getServiceId() != pmtSid)
return; // skip broken PMT records
if (pmtVersion != -1) {
if (pmtVersion != pmt.getVersionNumber()) {
Dprintf("cStreamdevPatFilter: PMT version changed, detaching all pids\n");
cFilter::Del(pmtPid, 0x02);
pmtPid = 0; // this triggers PAT scan
}
return;
}
pmtVersion = pmt.getVersionNumber();
SI::PMT::Stream stream;
int pids[MAXRECEIVEPIDS + 1], npids = 0;
pids[npids++] = pmtPid;
#if 0
pids[npids++] = 0x10; // pid 0x10, tid 0x40: NIT
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#endif
pids[npids++] = 0x11; // pid 0x11, tid 0x42: SDT
pids[npids++] = 0x14; // pid 0x14, tid 0x70: TDT
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pids[npids++] = 0x12; // pid 0x12, tid 0x4E...0x6F: EIT
for (SI::Loop::Iterator it; pmt.streamLoop.getNext(stream, it); )
if (0 != (pids[npids] = GetPid(stream)) && npids < MAXRECEIVEPIDS)
npids++;
pids[npids] = 0;
m_Streamer->SetPids(pmt.getPCRPid(), pids);
}
}
// --- cStreamdevLiveStreamer -------------------------------------------------
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cStreamdevLiveStreamer::cStreamdevLiveStreamer(int Priority, const cServerConnection *Connection):
cStreamdevStreamer("streamdev-livestreaming", Connection),
m_Priority(Priority),
m_NumPids(0),
m_StreamType(stTSPIDS),
m_Channel(NULL),
m_Device(NULL),
m_Receiver(NULL),
m_PatFilter(NULL),
m_Remux(NULL)
{
m_ReceiveBuffer = new cStreamdevBuffer(LIVEBUFSIZE, TS_SIZE *2, true, "streamdev-livestreamer"),
m_ReceiveBuffer->SetTimeouts(0, 100);
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}
cStreamdevLiveStreamer::~cStreamdevLiveStreamer()
{
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Dprintf("Desctructing Live streamer\n");
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Stop();
DELETENULL(m_PatFilter);
DELETENULL(m_Receiver);
delete m_Remux;
delete m_ReceiveBuffer;
}
bool cStreamdevLiveStreamer::HasPid(int Pid)
{
int idx;
for (idx = 0; idx < m_NumPids; ++idx)
if (m_Pids[idx] == Pid)
return true;
return false;
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}
bool cStreamdevLiveStreamer::SetPid(int Pid, bool On)
{
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int idx;
if (Pid == 0)
return true;
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if (On) {
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for (idx = 0; idx < m_NumPids; ++idx) {
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if (m_Pids[idx] == Pid)
return true; // No change needed
}
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if (m_NumPids == MAXRECEIVEPIDS) {
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esyslog("ERROR: Streamdev: No free slot to receive pid %d\n", Pid);
return false;
}
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m_Pids[m_NumPids++] = Pid;
m_Pids[m_NumPids] = 0;
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} else {
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for (idx = 0; idx < m_NumPids; ++idx) {
if (m_Pids[idx] == Pid) {
--m_NumPids;
memmove(&m_Pids[idx], &m_Pids[idx + 1], sizeof(int) * (m_NumPids - idx));
}
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}
}
StartReceiver();
return true;
}
bool cStreamdevLiveStreamer::SetPids(int Pid, const int *Pids1, const int *Pids2, const int *Pids3)
{
m_NumPids = 0;
if (Pid)
m_Pids[m_NumPids++] = Pid;
if (Pids1)
for ( ; *Pids1 && m_NumPids < MAXRECEIVEPIDS; Pids1++)
if (!HasPid(*Pids1))
m_Pids[m_NumPids++] = *Pids1;
if (Pids2)
for ( ; *Pids2 && m_NumPids < MAXRECEIVEPIDS; Pids2++)
if (!HasPid(*Pids2))
m_Pids[m_NumPids++] = *Pids2;
if (Pids3)
for ( ; *Pids3 && m_NumPids < MAXRECEIVEPIDS; Pids3++)
if (!HasPid(*Pids3))
m_Pids[m_NumPids++] = *Pids3;
if (m_NumPids >= MAXRECEIVEPIDS) {
esyslog("ERROR: Streamdev: No free slot to receive pid %d\n", Pid);
return false;
}
m_Pids[m_NumPids] = 0;
StartReceiver();
return true;
}
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void cStreamdevLiveStreamer::SetPriority(int Priority)
{
m_Priority = Priority;
StartReceiver();
}
void cStreamdevLiveStreamer::GetSignal(int *DevNum, int *Strength, int *Quality) const
{
if (m_Device) {
*DevNum = m_Device->DeviceNumber() + 1;
*Strength = m_Device->SignalStrength();
*Quality = m_Device->SignalQuality();
}
}
cString cStreamdevLiveStreamer::ToText() const
{
if (m_Device && m_Channel) {
return cString::sprintf("DVB%-2d %3d %s", m_Device->DeviceNumber() + 1, m_Channel->Number(), m_Channel->Name());
}
return cString("");
}
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bool cStreamdevLiveStreamer::IsReceiving(void) const
{
cThreadLock ThreadLock(m_Device);
return m_Receiver && m_Receiver->IsAttached();
}
void cStreamdevLiveStreamer::StartReceiver(void)
{
if (m_NumPids > 0) {
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Dprintf("Creating Receiver to respect changed pids\n");
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cReceiver *current = m_Receiver;
cThreadLock ThreadLock(m_Device);
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m_Receiver = new cStreamdevLiveReceiver(this, m_Channel, m_Priority, m_Pids);
if (IsRunning())
Attach();
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delete current;
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}
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else
DELETENULL(m_Receiver);
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}
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bool cStreamdevLiveStreamer::SetChannel(const cChannel *Channel, eStreamType StreamType, const int* Apid, const int *Dpid)
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{
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Dprintf("Initializing Remuxer for full channel transfer\n");
//printf("ca pid: %d\n", Channel->Ca());
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m_Channel = Channel;
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m_StreamType = StreamType;
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const int *Apids = Apid ? Apid : m_Channel->Apids();
const int *Dpids = Dpid ? Dpid : m_Channel->Dpids();
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switch (m_StreamType) {
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case stES:
{
int pid = ISRADIO(m_Channel) ? m_Channel->Apid(0) : m_Channel->Vpid();
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if (Apid && Apid[0])
pid = Apid[0];
else if (Dpid && Dpid[0])
pid = Dpid[0];
m_Remux = new cTS2ESRemux(pid);
return SetPids(pid);
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}
case stPES:
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m_Remux = new cTS2PESRemux(m_Channel->Vpid(), Apids, Dpids, m_Channel->Spids());
return SetPids(m_Channel->Vpid(), Apids, Dpids, m_Channel->Spids());
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case stPS:
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m_Remux = new cTS2PSRemux(m_Channel->Vpid(), Apids, Dpids, m_Channel->Spids());
return SetPids(m_Channel->Vpid(), Apids, Dpids, m_Channel->Spids());
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case stEXT:
m_Remux = new cExternRemux(Connection(), m_Channel, Apids, Dpids);
// fall through
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case stTS:
// This should never happen, but ...
if (m_PatFilter) {
Detach();
DELETENULL(m_PatFilter);
}
// Set pids from cChannel
SetPids(m_Channel->Vpid(), Apids, Dpids, m_Channel->Spids());
if (m_Channel->Vpid() != m_Channel->Ppid())
SetPid(m_Channel->Ppid(), true);
// Set pids from PMT
m_PatFilter = new cStreamdevPatFilter(this, m_Channel);
return true;
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case stTSPIDS:
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Dprintf("pid streaming mode\n");
return true;
default:
return false;
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}
}
void cStreamdevLiveStreamer::Receive(uchar *Data, int Length)
{
int p = m_ReceiveBuffer->PutTS(Data, Length);
if (p != Length)
m_ReceiveBuffer->ReportOverflow(Length - p);
}
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int cStreamdevLiveStreamer::Put(const uchar *Data, int Count)
{
// insert si data
if (m_PatFilter) {
int siCount;
uchar *siData = m_PatFilter->Get(siCount);
if (siData) {
if (m_Remux)
siCount = m_Remux->Put(siData, siCount);
else
siCount = cStreamdevStreamer::Put(siData, siCount);
if (siCount)
m_PatFilter->Del(siCount);
}
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}
if (m_Remux)
return m_Remux->Put(Data, Count);
else
return cStreamdevStreamer::Put(Data, Count);
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}
uchar *cStreamdevLiveStreamer::Get(int &Count)
{
if (m_Remux)
return m_Remux->Get(Count);
else
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return cStreamdevStreamer::Get(Count);
}
void cStreamdevLiveStreamer::Del(int Count)
{
if (m_Remux)
m_Remux->Del(Count);
else
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cStreamdevStreamer::Del(Count);
}
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void cStreamdevLiveStreamer::Attach(void)
{
Dprintf("cStreamdevLiveStreamer::Attach()\n");
if (m_Device) {
if (m_Receiver) {
m_Device->Detach(m_Receiver);
m_Device->AttachReceiver(m_Receiver);
}
if (m_PatFilter) {
m_Device->Detach(m_PatFilter);
m_Device->AttachFilter(m_PatFilter);
}
}
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}
void cStreamdevLiveStreamer::Detach(void)
{
Dprintf("cStreamdevLiveStreamer::Detach()\n");
if (m_Device) {
if (m_Receiver)
m_Device->Detach(m_Receiver);
if (m_PatFilter)
m_Device->Detach(m_PatFilter);
}
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}
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std::string cStreamdevLiveStreamer::Report(void)
{
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std::string result;
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if (m_Device != NULL)
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result += (std::string)"+- Device is " + (const char*)itoa(m_Device->CardIndex()) + "\n";
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if (m_Receiver != NULL)
result += "+- Receiver is allocated\n";
result += "+- Pids are ";
for (int i = 0; i < MAXRECEIVEPIDS; ++i)
if (m_Pids[i] != 0)
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result += (std::string)(const char*)itoa(m_Pids[i]) + ", ";
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result += "\n";
return result;
}