mirror of
https://github.com/rofafor/vdr-plugin-satip.git
synced 2023-10-10 13:37:42 +02:00
122 lines
3.8 KiB
C
122 lines
3.8 KiB
C
/*
|
|
* rtp.c: SAT>IP plugin for the Video Disk Recorder
|
|
*
|
|
* See the README file for copyright information and how to reach the author.
|
|
*
|
|
*/
|
|
|
|
#include "common.h"
|
|
#include "rtp.h"
|
|
|
|
cSatipRtp::cSatipRtp(cSatipTunerIf &tunerP, unsigned int bufferLenP)
|
|
: tunerM(tunerP),
|
|
bufferLenM(bufferLenP),
|
|
bufferM(MALLOC(unsigned char, bufferLenM)),
|
|
lastErrorReportM(0),
|
|
packetErrorsM(0),
|
|
sequenceNumberM(-1)
|
|
{
|
|
debug("cSatipRtp::%s(%u) [device %d]", __FUNCTION__, bufferLenP, tunerM.GetId());
|
|
if (bufferM)
|
|
memset(bufferM, 0, bufferLenM);
|
|
else
|
|
error("Cannot create RTP buffer!");
|
|
}
|
|
|
|
cSatipRtp::~cSatipRtp()
|
|
{
|
|
debug("cSatipRtp::%s() [device %d]", __FUNCTION__, tunerM.GetId());
|
|
DELETE_POINTER(bufferM);
|
|
}
|
|
|
|
int cSatipRtp::GetFd(void)
|
|
{
|
|
return Fd();
|
|
}
|
|
|
|
void cSatipRtp::Close(void)
|
|
{
|
|
debug("cSatipRtp::%s() [device %d]", __FUNCTION__, tunerM.GetId());
|
|
|
|
cSatipSocket::Close();
|
|
|
|
sequenceNumberM = -1;
|
|
if (packetErrorsM) {
|
|
info("Detected %d RTP packet errors", packetErrorsM);
|
|
packetErrorsM = 0;
|
|
lastErrorReportM = time(NULL);
|
|
}
|
|
}
|
|
|
|
int cSatipRtp::GetHeaderLenght(unsigned int lengthP)
|
|
{
|
|
//debug("cSatipRtp::%s() [device %d]", __FUNCTION__, tunerM.GetId());
|
|
unsigned int headerlen = 0;
|
|
|
|
if (lengthP > 0) {
|
|
if (bufferM[0] == TS_SYNC_BYTE)
|
|
return headerlen;
|
|
else if (lengthP > 3) {
|
|
// http://tools.ietf.org/html/rfc3550
|
|
// http://tools.ietf.org/html/rfc2250
|
|
// Version
|
|
unsigned int v = (bufferM[0] >> 6) & 0x03;
|
|
// Extension bit
|
|
unsigned int x = (bufferM[0] >> 4) & 0x01;
|
|
// CSCR count
|
|
unsigned int cc = bufferM[0] & 0x0F;
|
|
// Payload type: MPEG2 TS = 33
|
|
//unsigned int pt = bufferAddrP[1] & 0x7F;
|
|
// Sequence number
|
|
int seq = ((bufferM[2] & 0xFF) << 8) | (bufferM[3] & 0xFF);
|
|
if ((((sequenceNumberM + 1) % 0xFFFF) == 0) && (seq == 0xFFFF))
|
|
sequenceNumberM = -1;
|
|
else if ((sequenceNumberM >= 0) && (((sequenceNumberM + 1) % 0xFFFF) != seq)) {
|
|
packetErrorsM++;
|
|
if (time(NULL) - lastErrorReportM > eReportIntervalS) {
|
|
info("Detected %d RTP packet errors [device %d]", packetErrorsM, tunerM.GetId());
|
|
packetErrorsM = 0;
|
|
lastErrorReportM = time(NULL);
|
|
}
|
|
sequenceNumberM = seq;
|
|
}
|
|
else
|
|
sequenceNumberM = seq;
|
|
// Header lenght
|
|
headerlen = (3 + cc) * (unsigned int)sizeof(uint32_t);
|
|
// Check if extension
|
|
if (x) {
|
|
// Extension header length
|
|
unsigned int ehl = (((bufferM[headerlen + 2] & 0xFF) << 8) | (bufferM[headerlen + 3] & 0xFF));
|
|
// Update header length
|
|
headerlen += (ehl + 1) * (unsigned int)sizeof(uint32_t);
|
|
}
|
|
// Check for empty payload
|
|
if (lengthP == headerlen) {
|
|
debug("cSatipRtp::%s(%d): Received empty RTP packet #%d [device %d]", __FUNCTION__, lengthP, seq, tunerM.GetId());
|
|
headerlen = -1;
|
|
}
|
|
// Check that rtp is version 2 and payload contains multiple of TS packet data
|
|
else if ((v != 2) || (((lengthP - headerlen) % TS_SIZE) != 0) || (bufferM[headerlen] != TS_SYNC_BYTE)) {
|
|
debug("cSatipRtp::%s(%d): Received incorrect RTP packet #%d v=%d len=%d sync=0x%02X [device %d]", __FUNCTION__, lengthP, seq, v, headerlen, bufferM[headerlen], tunerM.GetId());
|
|
headerlen = -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return headerlen;
|
|
}
|
|
|
|
void cSatipRtp::Process(int fdP)
|
|
{
|
|
//debug("cSatipRtp::%s() [device %d]", __FUNCTION__, tunerM.GetId());
|
|
if (bufferM) {
|
|
int length = Read(bufferM, min(tunerM.GetVideoDataSize(), bufferLenM));
|
|
if (length > 0) {
|
|
int headerlen = GetHeaderLenght(length);
|
|
if ((headerlen >= 0) && (headerlen < length))
|
|
tunerM.ProcessVideoData(bufferM + headerlen, length - headerlen);
|
|
}
|
|
}
|
|
}
|