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Refactored epoll() to use only one thread.

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This commit is contained in:
Rolf Ahrenberg 2014-11-11 20:23:41 +02:00
parent e51650cd0a
commit e05801b464
9 changed files with 319 additions and 91 deletions
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4
Makefile
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@ -88,8 +88,8 @@ all-redirect: all
### The object files (add further files here):
OBJS = $(PLUGIN).o common.o config.o device.o discover.o param.o rtsp.o \
sectionfilter.o server.o setup.o socket.o statistics.o tuner.o
OBJS = $(PLUGIN).o common.o config.o device.o discover.o param.o poller.o \
rtsp.o sectionfilter.o server.o setup.o socket.o statistics.o tuner.o
### The main target:

3
common.h
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@ -8,6 +8,7 @@
#ifndef __SATIP_COMMON_H
#define __SATIP_COMMON_H
#include <vdr/device.h>
#include <vdr/tools.h>
#include <vdr/config.h>
#include <vdr/i18n.h>
@ -24,6 +25,8 @@
#define ELEMENTS(x) (sizeof(x) / sizeof(x[0]))
#define SATIP_MAX_DEVICES MAXDEVICES
#define SATIP_BUFFER_SIZE KILOBYTE(512)
#define SATIP_DEVICE_INFO_ALL 0

2
device.c
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@ -12,8 +12,6 @@
#include "param.h"
#include "device.h"
#define SATIP_MAX_DEVICES MAXDEVICES
static cSatipDevice * SatipDevicesS[SATIP_MAX_DEVICES] = { NULL };
cSatipDevice::cSatipDevice(unsigned int indexP)

161
poller.c Normal file
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@ -0,0 +1,161 @@
/*
* poller.c: SAT>IP plugin for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
*/
#include <sys/epoll.h>
#include "common.h"
#include "poller.h"
cSatipPoller *cSatipPoller::instanceS = NULL;
cSatipPoller *cSatipPoller::GetInstance(void)
{
if (!instanceS)
instanceS = new cSatipPoller();
return instanceS;
}
bool cSatipPoller::Initialize(void)
{
debug("cSatipPoller::%s()", __FUNCTION__);
if (instanceS)
instanceS->Activate();
return true;
}
void cSatipPoller::Destroy(void)
{
debug("cSatipPoller::%s()", __FUNCTION__);
if (instanceS)
instanceS->Deactivate();
}
cSatipPoller::cSatipPoller()
: cThread("SAT>IP poller"),
mutexM(),
tunersM(new cSatipPollerTuners()),
fdM(epoll_create(eMaxFileDescriptors))
{
debug("cSatipPoller::%s()", __FUNCTION__);
}
cSatipPoller::~cSatipPoller()
{
debug("cSatipPoller::%s()", __FUNCTION__);
Deactivate();
cMutexLock MutexLock(&mutexM);
close(fdM);
// Free allocated memory
DELETENULL(tunersM);
}
void cSatipPoller::Activate(void)
{
// Start the thread
Start();
}
void cSatipPoller::Deactivate(void)
{
debug("cSatipPoller::%s()", __FUNCTION__);
cMutexLock MutexLock(&mutexM);
if (Running())
Cancel(3);
}
void cSatipPoller::Action(void)
{
debug("cSatipPoller::%s(): entering", __FUNCTION__);
struct epoll_event events[eMaxFileDescriptors];
// Increase priority
SetPriority(-1);
// Do the thread loop
while (Running()) {
int nfds = epoll_wait(fdM, events, eMaxFileDescriptors, -1);
if (nfds == -1) {
error("epoll_wait() failed");
}
else if (nfds > 0) {
for (int i = 0; i < nfds; ++i) {
for (cSatipPollerTuner *tuner = tunersM->First(); tuner; tuner = tunersM->Next(tuner)) {
if (events[i].data.fd == tuner->VideoFd()) {
tuner->Poller()->ReadVideo();
break;
}
else if (events[i].data.fd == tuner->ApplicationFd()) {
tuner->Poller()->ReadApplication();
break;
}
}
}
}
}
debug("cSatipPoller::%s(): exiting", __FUNCTION__);
}
bool cSatipPoller::Register(cSatipPollerIf &pollerP)
{
debug("cSatipPoller::%s(%d)", __FUNCTION__, pollerP.GetPollerId());
cMutexLock MutexLock(&mutexM);
if (tunersM && (fdM >= 0)) {
bool found = false;
for (cSatipPollerTuner *tuner = tunersM->First(); tuner; tuner = tunersM->Next(tuner)) {
if (tuner->Poller() == &pollerP) {
found = true;
break;
}
}
if (!found) {
cSatipPollerTuner *tmp = new cSatipPollerTuner(pollerP, pollerP.GetVideoFd(), pollerP.GetApplicationFd());
if (tmp) {
tunersM->Add(tmp);
if (tmp->VideoFd() >= 0) {
struct epoll_event ev;
ev.events = EPOLLIN | EPOLLET;
ev.data.fd = tmp->VideoFd();
if (epoll_ctl(fdM, EPOLL_CTL_ADD, pollerP.GetVideoFd(), &ev) == -1) {
error("Cannot add video socket into epoll [device %d]", pollerP.GetPollerId());
}
}
if (tmp->ApplicationFd() >= 0) {
struct epoll_event ev;
ev.events = EPOLLIN | EPOLLET;
ev.data.fd = tmp->ApplicationFd();
if (epoll_ctl(fdM, EPOLL_CTL_ADD, tmp->ApplicationFd(), &ev) == -1) {
error("Cannot add application socket into epoll [device %d]", pollerP.GetPollerId());
}
}
debug("cSatipPoller::%s(%d): Added interface", __FUNCTION__, pollerP.GetPollerId());
}
}
return true;
}
return false;
}
bool cSatipPoller::Unregister(cSatipPollerIf &pollerP)
{
debug("cSatipPoller::%s(%d)", __FUNCTION__, pollerP.GetPollerId());
cMutexLock MutexLock(&mutexM);
if (tunersM && (fdM >= 0)) {
for (cSatipPollerTuner *tuner = tunersM->First(); tuner; tuner = tunersM->Next(tuner)) {
if (tuner->Poller() == &pollerP) {
if ((tuner->VideoFd() >= 0) && (epoll_ctl(fdM, EPOLL_CTL_DEL, tuner->VideoFd(), NULL) == -1)) {
error("Cannot remove video socket from epoll [device %d]", pollerP.GetPollerId());
}
if ((tuner->ApplicationFd() >= 0) && (epoll_ctl(fdM, EPOLL_CTL_DEL, tuner->ApplicationFd(), NULL) == -1)) {
error("Cannot remove application socket from epoll [device %d]", pollerP.GetPollerId());
}
tunersM->Del(tuner);
debug("cSatipPoller::%s(%d): Removed interface", __FUNCTION__, pollerP.GetPollerId());
return true;
}
}
}
return false;
}

64
poller.h Normal file
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@ -0,0 +1,64 @@
/*
* poller.h: SAT>IP plugin for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
*/
#ifndef __SATIP_POLLER_H
#define __SATIP_POLLER_H
#include <vdr/thread.h>
#include <vdr/tools.h>
#include "pollerif.h"
class cSatipPollerTuner : public cListObject {
private:
cSatipPollerIf* pollerM;
int videoFdM;
int applicationFdM;
public:
cSatipPollerTuner(cSatipPollerIf &pollerP, int videoFdP, int applicationFdP)
{
pollerM = &pollerP; videoFdM = videoFdP; applicationFdM = applicationFdP;
}
cSatipPollerIf* Poller(void) { return pollerM; }
int VideoFd(void) { return videoFdM; }
int ApplicationFd(void) { return applicationFdM; }
};
class cSatipPollerTuners : public cList<cSatipPollerTuner> {
};
class cSatipPoller : public cThread {
private:
enum {
eMaxFileDescriptors = SATIP_MAX_DEVICES * 2, // Data + Application
};
static cSatipPoller *instanceS;
cMutex mutexM;
cSatipPollerTuners *tunersM;
int fdM;
void Activate(void);
void Deactivate(void);
// constructor
cSatipPoller();
// to prevent copy constructor and assignment
cSatipPoller(const cSatipPoller&);
cSatipPoller& operator=(const cSatipPoller&);
protected:
virtual void Action(void);
public:
static cSatipPoller *GetInstance(void);
static bool Initialize(void);
static void Destroy(void);
virtual ~cSatipPoller();
bool Register(cSatipPollerIf &pollerP);
bool Unregister(cSatipPollerIf &pollerP);
};
#endif // __SATIP_POLLER_H

26
pollerif.h Normal file
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@ -0,0 +1,26 @@
/*
* pollerif.h: SAT>IP plugin for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
*/
#ifndef __SATIP_POLLERIF_H
#define __SATIP_POLLERIF_H
class cSatipPollerIf {
public:
cSatipPollerIf() {}
virtual ~cSatipPollerIf() {}
virtual void ReadVideo(void) = 0;
virtual void ReadApplication(void) = 0;
virtual int GetPollerId(void) = 0;
virtual int GetVideoFd(void) = 0;
virtual int GetApplicationFd(void) = 0;
private:
cSatipPollerIf(const cSatipPollerIf&);
cSatipPollerIf& operator=(const cSatipPollerIf&);
};
#endif // __SATIP_POLLERIF_H

3
satip.c
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@ -11,6 +11,7 @@
#include "config.h"
#include "device.h"
#include "discover.h"
#include "poller.h"
#include "setup.h"
#if defined(LIBCURL_VERSION_NUM) && LIBCURL_VERSION_NUM < 0x072400
@ -117,6 +118,7 @@ bool cPluginSatip::Initialize(void)
error("Unable to initialize CURL");
SatipConfig.SetConfigDirectory(cPlugin::ResourceDirectory(PLUGIN_NAME_I18N));
cSatipDiscover::GetInstance()->Initialize(serversM);
cSatipPoller::GetInstance()->Initialize();
return cSatipDevice::Initialize(deviceCountM);
}
@ -140,6 +142,7 @@ void cPluginSatip::Stop(void)
debug("cPluginSatip::%s()", __FUNCTION__);
// Stop any background activities the plugin is performing.
cSatipDevice::Shutdown();
cSatipPoller::GetInstance()->Destroy();
cSatipDiscover::GetInstance()->Destroy();
curl_global_cleanup();
}

134
tuner.c
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@ -5,11 +5,10 @@
*
*/
#include <sys/epoll.h>
#include "common.h"
#include "config.h"
#include "discover.h"
#include "poller.h"
#include "tuner.h"
cSatipTuner::cSatipTuner(cSatipDeviceIf &deviceP, unsigned int packetLenP)
@ -30,7 +29,6 @@ cSatipTuner::cSatipTuner(cSatipDeviceIf &deviceP, unsigned int packetLenP)
statusUpdateM(),
pidUpdateCacheM(),
sessionM(""),
fdM(epoll_create(eMaxFileDescriptors)),
timeoutM(eMinKeepAliveIntervalMs),
openedM(false),
tunedM(false),
@ -61,26 +59,8 @@ cSatipTuner::cSatipTuner(cSatipDeviceIf &deviceP, unsigned int packetLenP)
if ((rtpSocketM->Port() <= 0) || (rtcpSocketM->Port() <= 0)) {
error("Cannot open required RTP/RTCP ports [device %d]", deviceIdM);
}
// Setup epoll
if (fdM >= 0) {
if (rtpSocketM->Fd() >= 0) {
struct epoll_event ev;
ev.events = EPOLLIN | EPOLLET;
ev.data.fd = rtpSocketM->Fd();
if (epoll_ctl(fdM, EPOLL_CTL_ADD, rtpSocketM->Fd(), &ev) == -1) {
error("Cannot add RTP socket into epoll [device %d]", deviceIdM);
}
}
if (rtcpSocketM->Fd() >= 0) {
struct epoll_event ev;
ev.events = EPOLLIN | EPOLLET;
ev.data.fd = rtcpSocketM->Fd();
if (epoll_ctl(fdM, EPOLL_CTL_ADD, rtcpSocketM->Fd(), &ev) == -1) {
error("Cannot add RTP socket into epoll [device %d]", deviceIdM);
}
}
}
// Must be done after socket initialization!
cSatipPoller::GetInstance()->Register(*this);
// Start thread
Start();
@ -95,18 +75,8 @@ cSatipTuner::~cSatipTuner()
Cancel(3);
Close();
// Cleanup epoll
if (fdM >= 0) {
if ((rtpSocketM->Fd() >= 0) && (epoll_ctl(fdM, EPOLL_CTL_DEL, rtpSocketM->Fd(), NULL) == -1)) {
error("Cannot remove RTP socket from epoll [device %d]", deviceIdM);
}
if ((rtcpSocketM->Fd() >= 0) && (epoll_ctl(fdM, EPOLL_CTL_DEL, rtcpSocketM->Fd(), NULL) == -1)) {
error("Cannot remove RTP socket from epoll [device %d]", deviceIdM);
}
close(fdM);
}
// Close the listening sockets
cSatipPoller::GetInstance()->Unregister(*this);
rtpSocketM->Close();
rtcpSocketM->Close();
@ -121,57 +91,28 @@ void cSatipTuner::Action(void)
{
debug("cSatipTuner::%s(): entering [device %d]", __FUNCTION__, deviceIdM);
cTimeMs timeout(eReConnectTimeoutMs);
// Increase priority
SetPriority(-1);
// Do the thread loop
while (packetBufferM && rtpSocketM && rtcpSocketM && Running()) {
struct epoll_event events[eMaxFileDescriptors];
int nfds = epoll_wait(fdM, events, eMaxFileDescriptors, eReadTimeoutMs);
switch (nfds) {
default:
for (int i = 0; i < nfds; ++i) {
timeout.Set(eReConnectTimeoutMs);
if (events[i].data.fd == rtpSocketM->Fd()) {
// Read data
int length = rtpSocketM->ReadVideo(packetBufferM, min(deviceM->CheckData(), packetBufferLenM));
if (length > 0) {
AddTunerStatistic(length);
deviceM->WriteData(packetBufferM, length);
}
}
else if (events[i].data.fd == rtcpSocketM->Fd()) {
unsigned char buf[1450];
memset(buf, 0, sizeof(buf));
if (rtcpSocketM->ReadApplication(buf, sizeof(buf)) > 0)
ParseReceptionParameters((const char *)buf);
}
}
// fall through!
case 0:
// Update pids
UpdatePids();
// Remember the heart beat
KeepAlive();
// Read reception statistics via DESCRIBE and RTCP
if (ReadReceptionStatus()) {
// Quirk for devices without valid reception data
if (currentServerM && currentServerM->Quirk(cSatipServer::eSatipQuirkForceLock)) {
hasLockM = true;
signalStrengthM = eDefaultSignalStrength;
signalQualityM = eDefaultSignalQuality;
}
}
// Reconnect if necessary
if (openedM && timeout.TimedOut()) {
Disconnect();
Connect();
timeout.Set(eReConnectTimeoutMs);
}
break;
case -1:
error("epoll_wait() failed");
break;
while (Running()) {
// Update pids
UpdatePids();
// Remember the heart beat
KeepAlive();
// Read reception statistics via DESCRIBE and RTCP
if (ReadReceptionStatus()) {
// Quirk for devices without valid reception data
if (currentServerM && currentServerM->Quirk(cSatipServer::eSatipQuirkForceLock)) {
hasLockM = true;
signalStrengthM = eDefaultSignalStrength;
signalQualityM = eDefaultSignalQuality;
}
}
// Reconnect if necessary
if (openedM && timeout.TimedOut()) {
Disconnect();
Connect();
timeout.Set(eReConnectTimeoutMs);
}
sleepM.Wait(100); // to avoid busy loop and reduce cpu load
}
debug("cSatipTuner::%s(): exiting [device %d]", __FUNCTION__, deviceIdM);
}
@ -343,6 +284,7 @@ bool cSatipTuner::SetSource(cSatipServer *serverP, const char *parameterP, const
}
else
Disconnect();
sleepM.Signal();
return true;
}
@ -361,6 +303,7 @@ bool cSatipTuner::SetPid(int pidP, int typeP, bool onP)
addPidsM.RemovePid(pidP);
}
pidUpdateCacheM.Set(ePidUpdateIntervalMs);
sleepM.Signal();
return true;
}
@ -461,3 +404,28 @@ cString cSatipTuner::GetInformation(void)
//debug("cSatipTuner::%s() [device %d]", __FUNCTION__, deviceIdM);
return tunedM ? cString::sprintf("rtsp://%s/?%s [stream=%d]", *streamAddrM, *streamParamM, streamIdM) : "connection failed";
}
void cSatipTuner::ReadVideo(void)
{
//debug("cSatipTuner::%s() [device %d]", __FUNCTION__, deviceIdM);
//cMutexLock MutexLock(&mutexM);
if (deviceM && packetBufferM && rtpSocketM) {
int length = rtpSocketM->ReadVideo(packetBufferM, min(deviceM->CheckData(), packetBufferLenM));
if (length > 0) {
AddTunerStatistic(length);
deviceM->WriteData(packetBufferM, length);
}
}
}
void cSatipTuner::ReadApplication(void)
{
//debug("cSatipTuner::%s() [device %d]", __FUNCTION__, deviceIdM);
//cMutexLock MutexLock(&mutexM);
if (deviceM && packetBufferM && rtcpSocketM) {
unsigned char buf[1450];
memset(buf, 0, sizeof(buf));
if (rtcpSocketM->ReadApplication(buf, sizeof(buf)) > 0)
ParseReceptionParameters((const char *)buf);
}
}

13
tuner.h
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@ -12,6 +12,7 @@
#include <vdr/tools.h>
#include "deviceif.h"
#include "pollerif.h"
#include "rtsp.h"
#include "server.h"
#include "statistics.h"
@ -43,14 +44,12 @@ public:
}
};
class cSatipTuner : public cThread, public cSatipTunerStatistics, public cSatipTunerIf {
class cSatipTuner : public cThread, public cSatipTunerStatistics, public cSatipTunerIf, public cSatipPollerIf {
private:
enum {
eMaxFileDescriptors = 2, // RTP + RTCP
eDummyPid = 100,
eDefaultSignalStrength = 15,
eDefaultSignalQuality = 224,
eReadTimeoutMs = 500, // in milliseconds
eStatusUpdateTimeoutMs = 1000, // in milliseconds
eConnectTimeoutMs = 1500, // in milliseconds
ePidUpdateIntervalMs = 250, // in milliseconds
@ -76,7 +75,6 @@ private:
cTimeMs signalInfoCacheM;
cTimeMs pidUpdateCacheM;
cString sessionM;
int fdM;
int timeoutM;
bool openedM;
bool tunedM;
@ -118,6 +116,13 @@ public:
virtual void SetStreamId(int streamIdP);
virtual void SetSessionTimeout(const char *sessionP, int timeoutP);
virtual int GetId(void);
// for internal poller interface
virtual void ReadVideo(void);
virtual void ReadApplication(void);
virtual int GetPollerId(void) { return GetId(); }
virtual int GetVideoFd(void) { return rtpSocketM ? rtpSocketM->Fd() : -1; };
virtual int GetApplicationFd(void) { return rtcpSocketM ? rtcpSocketM->Fd() : -1; }
};
#endif // __SATIP_TUNER_H