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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 5.1 2021/03/16 15:10:54 kls Exp $
*/
#include "filter.h"
#include "sections.h"
// --- cSectionSyncer --------------------------------------------------------
cSectionSyncer::cSectionSyncer(bool Random)
{
random = Random;
Reset();
}
void cSectionSyncer::Reset(void)
{
currentVersion = -1;
currentSection = -1;
synced = false;
complete = false;
segments = 0;
memset(sections, 0x00, sizeof(sections));
}
bool cSectionSyncer::Check(uchar Version, int SectionNumber)
{
if (Version != currentVersion) {
Reset();
currentVersion = Version;
}
if (complete)
return false;
if (!random) {
if (!synced) {
if (SectionNumber == 0) {
currentSection = 0;
synced = true;
}
else
return false;
}
if (SectionNumber != currentSection)
return false;
}
return !GetSectionFlag(SectionNumber);
}
bool cSectionSyncer::Processed(int SectionNumber, int LastSectionNumber, int SegmentLastSectionNumber)
{
SetSectionFlag(SectionNumber, true); // the flag for this section
if (!random)
currentSection++; // expect the next section
int Index = SectionNumber / 8; // the segment (byte) in which this section lies
uchar b = 0xFF; // all sections in this segment
if (SegmentLastSectionNumber < 0 && Index == LastSectionNumber / 8)
SegmentLastSectionNumber = LastSectionNumber;
if (SegmentLastSectionNumber >= 0) {
b >>= 7 - (SegmentLastSectionNumber & 0x07); // limits them up to the last section in this segment
if (!random && SectionNumber == SegmentLastSectionNumber)
currentSection = (SectionNumber + 8) & ~0x07; // expect first section of next segment
}
if (sections[Index] == b) // all expected sections in this segment have been received
segments |= 1 << Index; // so we set the respective bit in the segments flags
uint32_t s = 0xFFFFFFFF; // all segments
s >>= 31 - (LastSectionNumber / 8); // limits them up to the last expected segment
complete = segments == s;
return complete;
}
#if DEPRECATED_SECTIONSYNCER_SYNC_REPEAT
void cSectionSyncer::Repeat(void)
{
SetSectionFlag(currentSection, false);
synced = false;
complete = false;
}
bool cSectionSyncer::Sync(uchar Version, int Number, int LastNumber)
{
if (Version != currentVersion) {
Reset();
currentVersion = Version;
}
if (!synced) {
if (Number != 0)
return false;
else
synced = true;
}
currentSection = Number;
bool Result = !GetSectionFlag(Number);
SetSectionFlag(Number, true);
if (Number == LastNumber)
complete = true;
return Result;
}
#endif
// --- 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;
}
cFilterData& cFilterData::operator= (const cFilterData &FilterData)
{
pid = FilterData.pid;
tid = FilterData.tid;
mask = FilterData.mask;
sticky = FilterData.sticky;
return *this;
}
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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