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/*
* filter.c: Section filter
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: filter.c 2.0 2004/01/11 13:31:34 kls Exp $
*/
#include "filter.h"
#include "sections.h"
// --- cSectionSyncer --------------------------------------------------------
cSectionSyncer::cSectionSyncer(void)
{
Reset();
}
void cSectionSyncer::Reset(void)
{
lastVersion = 0xFF;
synced = false;
}
bool cSectionSyncer::Sync(uchar Version, int Number, int LastNumber)
{
if (Version == lastVersion)
return false;
if (!synced) {
if (Number != 0)
return false; // sync on first section
synced = true;
}
if (Number == LastNumber)
lastVersion = Version;
return synced;
}
// --- cFilterData -----------------------------------------------------------
cFilterData::cFilterData(void)
{
pid = 0;
tid = 0;
mask = 0;
sticky = false;
}
cFilterData::cFilterData(u_short Pid, u_char Tid, u_char Mask, bool Sticky)
{
pid = Pid;
tid = Tid;
mask = Mask;
sticky = Sticky;
}
bool cFilterData::Is(u_short Pid, u_char Tid, u_char Mask)
{
return pid == Pid && tid == Tid && mask == Mask;
}
bool cFilterData::Matches(u_short Pid, u_char Tid)
{
return pid == Pid && tid == (Tid & mask);
}
// --- cFilter ---------------------------------------------------------------
cFilter::cFilter(void)
{
sectionHandler = NULL;
on = false;
}
cFilter::cFilter(u_short Pid, u_char Tid, u_char Mask)
{
sectionHandler = NULL;
on = false;
Set(Pid, Tid, Mask);
}
cFilter::~cFilter()
{
if (sectionHandler)
sectionHandler->Detach(this);
}
int cFilter::Source(void)
{
return sectionHandler ? sectionHandler->Source() : 0;
}
int cFilter::Transponder(void)
{
return sectionHandler ? sectionHandler->Transponder() : 0;
}
const cChannel *cFilter::Channel(void)
{
return sectionHandler ? sectionHandler->Channel() : NULL;
}
void cFilter::SetStatus(bool On)
{
if (sectionHandler && on != On) {
cFilterData *fd = data.First();
while (fd) {
if (On)
sectionHandler->Add(fd);
else {
sectionHandler->Del(fd);
if (!fd->sticky) {
cFilterData *next = data.Next(fd);
data.Del(fd);
fd = next;
continue;
}
}
fd = data.Next(fd);
}
on = On;
}
}
bool cFilter::Matches(u_short Pid, u_char Tid)
{
if (on) {
for (cFilterData *fd = data.First(); fd; fd = data.Next(fd)) {
if (fd->Matches(Pid, Tid))
return true;
}
}
return false;
}
void cFilter::Set(u_short Pid, u_char Tid, u_char Mask)
{
Add(Pid, Tid, Mask, true);
}
void cFilter::Add(u_short Pid, u_char Tid, u_char Mask, bool Sticky)
{
cFilterData *fd = new cFilterData(Pid, Tid, Mask, Sticky);
data.Add(fd);
if (sectionHandler && on)
sectionHandler->Add(fd);
}
void cFilter::Del(u_short Pid, u_char Tid, u_char Mask)
{
for (cFilterData *fd = data.First(); fd; fd = data.Next(fd)) {
if (fd->Is(Pid, Tid, Mask)) {
if (sectionHandler && on)
sectionHandler->Del(fd);
data.Del(fd);
return;
}
}
}
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