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/*
* overlap.cpp: A program for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
*/
#include "overlap.h"
#include "debug.h"
// global variable
extern bool abortNow;
// --------------------------------------------------------------------------------------------------------------------------------
cOverlap::cOverlap(cDecoder *decoderParam, cIndex *indexParam) {
decoder = decoderParam;
index = indexParam;
}
cOverlap::~cOverlap() {
}
bool cOverlap::DetectOverlap(cMarks *marksParam) {
if (abortNow) return false;
if (!decoder) return false;
if (!index) return false;
if (!marksParam) return false;
marks = marksParam;
if (marks->Count() < 4) {
dsyslog("cOverlap::DetectOverlap(): not enough marks for overlap detection");
return false;
}
if (!decoder->Restart()) return false;
bool save = false;
cMark *p1 = nullptr;
cMark *p2 = nullptr;
// start around first ad (2. and 3. mark)
p1 = marks->GetFirst();
if (!p1) return false;
p1 = p1->Next();
if (p1) p2 = p1->Next();
while ((p1) && (p2)) {
if (abortNow) return false;
if (decoder) {
LogSeparator(false);
dsyslog("cOverlap::DetectOverlap(): check overlap before stop mark (%d) and after start mark (%d)", p1->position, p2->position);
// init overlap detection around ad
cOverlapAroundAd *overlapAroundAd = new cOverlapAroundAd(decoder);
ALLOC(sizeof(*overlapAroundAd), "overlapAroundAd");
// detect overlap before stop and after start
if (!ProcessMarksOverlap(overlapAroundAd, &p1, &p2)) {
if (p1 && p2) dsyslog("cOverlap::DetectOverlap(): no overlap found before stop mark (%d) and after start (%d)", p1->position, p2->position);
else esyslog("cOverlap::DetectOverlap(): marks invalid after ProcessMarksOverlap()");
}
else save = true;
// free overlap detection object
FREE(sizeof(*overlapAroundAd), "overlapAroundAd");
delete overlapAroundAd;
}
if (!p1 || !p2) break; // failed move will return nullptr pointer
p1 = p2->Next();
if (p1) {
p2 = p1->Next();
}
else {
p2 = nullptr;
}
}
return save;
}
bool cOverlap::ProcessMarksOverlap(cOverlapAroundAd *overlapAroundAd, cMark **mark1, cMark **mark2) {
if (!decoder) return false;
if (!index) return false;
if (!marks) return false;
if (!mark1) return false;
if (!(*mark1)) return false;
if (!mark2) return false;
if (!(*mark2)) return false;
sOverlapPos overlapPos;
overlapPos.similarBeforeStartPacketNumber = -1;
overlapPos.similarBeforeEndPacketNumber = -1;
overlapPos.similarAfterStartPacketNumber = -1;
overlapPos.similarAfterEndPacketNumber = -1;
int frameRate = decoder->GetVideoFrameRate();
// max overlap found: 94200ms (TELE 5)
#define OVERLAP_CHECK_BEFORE 100 // start before stop mark, changed from 90 to 100
#define OVERLAP_CHECK_AFTER 100 // end after start mark, changed from 90 to 100
// calculate overlap check positions
int fRangeBegin = (*mark1)->position - (frameRate * OVERLAP_CHECK_BEFORE);
if (fRangeBegin < 0) fRangeBegin = 0; // not before beginning of broadcast
fRangeBegin = index->GetKeyPacketNumberAfter(fRangeBegin);
if (fRangeBegin < 0) {
esyslog("cOverlap::ProcessMarksOverlap(): GetKeyPacketNumberAfter() failed for frame (%d)", fRangeBegin);
return false;
}
int fRangeEnd = (*mark2)->position + (frameRate * OVERLAP_CHECK_AFTER);
fRangeEnd = index->GetKeyPacketNumberBefore(fRangeEnd);
if (fRangeEnd < 0) {
esyslog("cOverlap::ProcessMarksOverlap(): GetKeyPacketNumberBefore() failed for frame (%d)", fRangeEnd);
return false;
}
// check if search range is possible
if (decoder->GetPacketNumber() > fRangeBegin) {
dsyslog("cOverlap::ProcessMarksOverlap(): current framenumber (%d) greater then start frame (%d), set start to current frame", decoder->GetPacketNumber(), fRangeBegin);
fRangeBegin = decoder->GetPacketNumber();
}
// seek to start frame of overlap check
char *indexToHMSF = marks->IndexToHMSF(fRangeBegin, AV_NOPTS_VALUE, false);
if (indexToHMSF) {
ALLOC(strlen(indexToHMSF)+1, "indexToHMSF");
dsyslog("cOverlap::ProcessMarksOverlap(): start check %ds before start mark (%d) from frame (%d) at %s", OVERLAP_CHECK_BEFORE, (*mark1)->position, fRangeBegin, indexToHMSF);
FREE(strlen(indexToHMSF)+1, "indexToHMSF");
free(indexToHMSF);
}
dsyslog("cOverlap::ProcessMarksOverlap(): preload from frame (%5d) to (%5d)", fRangeBegin, (*mark1)->position);
dsyslog("cOverlap::ProcessMarksOverlap(): compare with frames from (%5d) to (%5d)", (*mark2)->position, fRangeEnd);
if (decoder->GetPacketNumber() > fRangeBegin) {
dsyslog("cOverlap::ProcessMarksOverlap(): current framenumber (%d) greater then start frame (%d), set start to current frame", decoder->GetPacketNumber(), fRangeBegin);
fRangeBegin = decoder->GetPacketNumber();
}
// seek to start frame
if (!decoder->SeekToPacket(fRangeBegin)) {
esyslog("could not seek to frame (%i)", fRangeBegin);
return false;
}
// get frame count of range before stop mark to check for overlap
int frameCount;
if (decoder->GetFullDecode()) frameCount = (*mark1)->position - fRangeBegin + 1;
else frameCount = index->GetIFrameRangeCount(fRangeBegin, (*mark1)->position);
if (frameCount < 0) {
dsyslog("cOverlap::ProcessMarksOverlap(): GetIFrameRangeCount failed at range (%d,%d))", fRangeBegin, (*mark1)->position);
return false;
}
dsyslog("cOverlap::ProcessMarksOverlap(): %d frames to preload between start of check (%d) and stop mark (%d)", frameCount, fRangeBegin, (*mark1)->position);
// preload frames before stop mark
while (decoder->DecodeNextFrame(false) && (decoder->GetPacketNumber() <= (*mark1)->position)) { // no audio
if (abortNow) return false;
#ifdef DEBUG_OVERLAP
dsyslog("------------------------------------------------------------------------------------------------");
#endif
#ifdef DEBUG_OVERLAP_FRAME_RANGE
if ((decoder->GetPacketNumber() > (DEBUG_OVERLAP_FRAME_BEFORE - DEBUG_OVERLAP_FRAME_RANGE)) &&
(decoder->GetPacketNumber() < (DEBUG_OVERLAP_FRAME_BEFORE + DEBUG_OVERLAP_FRAME_RANGE))) SaveFrame(decoder->GetPacketNumber(), nullptr, nullptr);
#endif
const sVideoPicture *picture = decoder->GetVideoPicture();
if (!picture) continue;
overlapAroundAd->Process(picture, frameCount, true, (decoder->GetVideoType() == MARKAD_PIDTYPE_VIDEO_H264));
}
// seek to iFrame before start mark
fRangeBegin = index->GetKeyPacketNumberBefore((*mark2)->position);
if (fRangeBegin <= 0) {
dsyslog("cOverlap::ProcessMarksOverlap(): GetKeyPacketNumberBefore failed for frame (%d)", fRangeBegin);
return false;
}
if (fRangeBegin < decoder->GetPacketNumber()) fRangeBegin = decoder->GetPacketNumber(); // on very short stop/start pairs we have no room to go before start mark
indexToHMSF = marks->IndexToHMSF(fRangeBegin, AV_NOPTS_VALUE, false);
if (indexToHMSF) {
ALLOC(strlen(indexToHMSF)+1, "indexToHMSF");
dsyslog("cOverlap::ProcessMarksOverlap(): seek forward to frame (%d) at %s before start mark (%d) and start overlap check", fRangeBegin, indexToHMSF, (*mark2)->position);
FREE(strlen(indexToHMSF)+1, "indexToHMSF");
free(indexToHMSF);
}
if (!decoder->SeekToPacket(fRangeBegin)) {
esyslog("could not seek to frame (%d)", fRangeBegin);
return false;
}
if (decoder->GetFullDecode()) frameCount = fRangeEnd - fRangeBegin + 1;
else frameCount = index->GetIFrameRangeCount(fRangeBegin, fRangeEnd) - 2;
if (frameCount < 0) {
dsyslog("cOverlap::ProcessMarksOverlap(): GetIFrameRangeCount failed at range (%d,%d))", fRangeBegin, (*mark1)->position);
return false;
}
dsyslog("cOverlap::ProcessMarksOverlap(): %d frames to preload between start mark (%d) and end of check (%d)", frameCount, (*mark2)->position, fRangeEnd);
// process frames after start mark and detect overlap
while (decoder->DecodeNextFrame(false) && (decoder->GetPacketNumber() <= fRangeEnd)) {
if (abortNow) return false;
#ifdef DEBUG_OVERLAP
dsyslog("------------------------------------------------------------------------------------------------");
#endif
#ifdef DEBUG_OVERLAP_FRAME_RANGE
if ((decoder->GetPacketNumber() > (DEBUG_OVERLAP_FRAME_AFTER - DEBUG_OVERLAP_FRAME_RANGE)) &&
(decoder->GetPacketNumber() < (DEBUG_OVERLAP_FRAME_AFTER + DEBUG_OVERLAP_FRAME_RANGE))) SaveFrame(decoder->GetPacketNumber(), nullptr, nullptr);
#endif
const sVideoPicture *picture = decoder->GetVideoPicture();
if (!picture) continue;
overlapAroundAd->Process(picture, frameCount, false, (decoder->GetVideoType() == MARKAD_PIDTYPE_VIDEO_H264));
}
dsyslog("cOverlapAroundAd::ProcessMarksOverlap(): start compare frames");
overlapAroundAd->Detect(&overlapPos);
#ifdef DEBUG_OVERLAP
dsyslog("cOverlapAroundAd::ProcessMarksOverlap(): overlap from (%d) before stop mark and (%d) after start mark", overlapPos.similarBeforeEndPacketNumber, overlapPos.similarAfterEndPacketNumber);
#endif
if (overlapPos.similarAfterEndPacketNumber >= 0) {
// found overlap
int lengthBefore = 1000 * (overlapPos.similarBeforeEndPacketNumber - overlapPos.similarBeforeStartPacketNumber + 1) / frameRate; // include first and last
int lengthAfter = 1000 * (overlapPos.similarAfterEndPacketNumber - overlapPos.similarAfterStartPacketNumber + 1) / frameRate;
char *indexToHMSFbeforeStart = marks->IndexToHMSF(overlapPos.similarBeforeStartPacketNumber, overlapPos.similarBeforeStartPTS, false);
if (indexToHMSFbeforeStart) {
ALLOC(strlen(indexToHMSFbeforeStart)+1, "indexToHMSFbeforeStart");
}
char *indexToHMSFbeforeEnd = marks->IndexToHMSF(overlapPos.similarBeforeEndPacketNumber, overlapPos.similarBeforeEndPTS, false);
if (indexToHMSFbeforeEnd) {
ALLOC(strlen(indexToHMSFbeforeEnd)+1, "indexToHMSFbeforeEnd");
}
char *indexToHMSFafterStart = marks->IndexToHMSF(overlapPos.similarAfterStartPacketNumber, overlapPos.similarAfterStartPTS, false);
if (indexToHMSFafterStart) {
ALLOC(strlen(indexToHMSFafterStart)+1, "indexToHMSFafterStart");
}
char *indexToHMSFafterEnd = marks->IndexToHMSF(overlapPos.similarAfterEndPacketNumber, overlapPos.similarAfterEndPTS, false);
if (indexToHMSFafterEnd) {
ALLOC(strlen(indexToHMSFafterEnd)+1, "indexToHMSFafterEnd");
}
dsyslog("cOverlap::ProcessMarksOverlap(): similar from (%5d) PTS %" PRId64 " at %s to (%5d) PTS %" PRId64 " at %s, length %5dms", overlapPos.similarBeforeStartPacketNumber, overlapPos.similarBeforeStartPTS, indexToHMSFbeforeStart, overlapPos.similarBeforeEndPacketNumber, overlapPos.similarBeforeEndPTS, indexToHMSFbeforeEnd, lengthBefore);
dsyslog("cOverlap::ProcessMarksOverlap(): (%5d) at %s to (%5d) at %s, length %5dms", overlapPos.similarAfterStartPacketNumber, indexToHMSFafterStart, overlapPos.similarAfterEndPacketNumber, indexToHMSFafterEnd, lengthAfter);
dsyslog("cOverlap::ProcessMarksOverlap(): maximum deviation in overlap %6d", overlapPos.similarMax);
if (overlapPos.similarEnd > 0) dsyslog("cOverlap::ProcessMarksOverlap(): next deviation after overlap %6d", overlapPos.similarEnd); // can be 0 if overlap ends at the mark
const char *indexToHMSFmark1 = marks->GetTime(*mark1);
const char *indexToHMSFmark2 = marks->GetTime(*mark2);
int gapStop = ((*mark1)->position - overlapPos.similarBeforeEndPacketNumber) / frameRate;
int lengthBeforeStop = ((*mark1)->position - overlapPos.similarBeforeStartPacketNumber) / frameRate;
int gapStart = (overlapPos.similarAfterStartPacketNumber - (*mark2)->position) / frameRate;
int lengthAfterStart = (overlapPos.similarAfterEndPacketNumber - (*mark2)->position) / frameRate;
if (indexToHMSFbeforeStart && indexToHMSFbeforeEnd && indexToHMSFafterStart && indexToHMSFafterEnd && indexToHMSFmark1 && indexToHMSFmark2) {
dsyslog("cOverlap::ProcessMarksOverlap(): overlap from (%6d) at %s to (%6d) at %s, before stop mark gap %3ds length %3ds, are identical with",overlapPos.similarBeforeEndPacketNumber, indexToHMSFbeforeEnd, (*mark1)->position, indexToHMSFmark1, gapStop, lengthBeforeStop);
dsyslog("cOverlap::ProcessMarksOverlap(): (%6d) at %s to (%6d) at %s, after start mark gap %3ds length %3ds", (*mark2)->position, indexToHMSFmark2, overlapPos.similarAfterEndPacketNumber, indexToHMSFafterEnd, gapStart, lengthAfterStart);
}
if (indexToHMSFbeforeStart) {
FREE(strlen(indexToHMSFbeforeStart)+1, "indexToHMSFbeforeStart");
free(indexToHMSFbeforeStart);
}
if (indexToHMSFbeforeEnd) {
FREE(strlen(indexToHMSFbeforeEnd)+1, "indexToHMSFbeforeEnd");
free(indexToHMSFbeforeEnd);
}
if (indexToHMSFafterStart) {
FREE(strlen(indexToHMSFafterStart)+1, "indexToHMSFafterStart");
free(indexToHMSFafterStart);
}
if (indexToHMSFafterEnd) {
FREE(strlen(indexToHMSFafterEnd)+1, "indexToHMSFafterEnd");
free(indexToHMSFafterEnd);
}
// check overlap gap
int gapStartMax = 16; // changed gapStart from 21 to 18 to 16
if (gapStop > 0) gapStartMax = 14; // smaller valid diff if we do not hit stop mark, if both are not 0, this can be a invalid overlap
else if (((*mark2)->type == MT_LOGOSTART) && (lengthBefore >= 38080)) gapStartMax = 21; // trust long overlaps, there can be info logo after logo start mark
if (((*mark2)->type == MT_ASPECTSTART) || ((*mark2)->type == MT_VBORDERSTART)) gapStartMax = 7; // for strong marks we can check with a lower value
dsyslog("cOverlap::ProcessMarksOverlap(): maximum valid gap after start mark: %ds", gapStartMax);
if ((lengthBefore >= 46640) || // very long overlaps should be valid
((gapStop < 23) && (gapStart == 0)) || // if we hit start mark, trust greater stop gap, maybe we have no correct stop mark, changed from 34 to 23
((gapStop < 15) && (gapStart <= gapStartMax))) { // we can not detect all similars during a scene changes, changed from 27 to 15
// but if it is too far away it is a false positiv
// changed gapStop from 36 to 27
dsyslog("cOverlap::ProcessMarksOverlap(): overlap gap to marks are valid, before stop mark %ds, after start mark %ds, length %dms", gapStop, gapStart, lengthBefore);
*mark1 = marks->Move((*mark1), overlapPos.similarBeforeEndPacketNumber, overlapPos.similarBeforeEndPTS, MT_OVERLAPSTOP);
if (!(*mark1)) {
esyslog("cOverlap::ProcessMarksOverlap(): move stop mark failed");
return false;
}
*mark2 = marks->Move((*mark2), overlapPos.similarAfterEndPacketNumber, overlapPos.similarAfterEndPTS, MT_OVERLAPSTART);
if (!(*mark2)) {
esyslog("cOverlap::ProcessMarksOverlap(): move start mark failed");
return false;
}
}
else dsyslog("cOverlap::ProcessMarksOverlap(): overlap gap to marks are not valid, before stop mark %ds, after start mark %ds, length %dms", gapStop, gapStart, lengthBefore);
return true;
}
return false;
}
// --------------------------------------------------------------------------------------------------------------------------------
cOverlapAroundAd::cOverlapAroundAd(cDecoder *decoderParam) {
decoder = decoderParam;
}
cOverlapAroundAd::~cOverlapAroundAd() {
#ifdef DEBUG_OVERLAP
dsyslog("cOverlapAroundAd::~cOverlapAroundAd()(): delete object");
#endif
if (histbuf[OV_BEFORE]) {
FREE(sizeof(*histbuf[OV_BEFORE]), "histbuf");
delete[] histbuf[OV_BEFORE];
histbuf[OV_BEFORE] = nullptr;
}
if (histbuf[OV_AFTER]) {
FREE(sizeof(*histbuf[OV_AFTER]), "histbuf");
delete[] histbuf[OV_AFTER];
histbuf[OV_AFTER] = nullptr;
}
}
void cOverlapAroundAd::Process(const sVideoPicture *picture, const int frameCount, const bool beforeAd, const bool h264) {
#ifdef DEBUG_OVERLAP
dsyslog("cOverlapAroundAd::Process(): frameNumber %d, frameCount %d, beforeAd %d, isH264 %d", frameNumber, frameCount, beforeAd, h264);
#endif
if ((lastFrameNumber > 0) && (similarMinLength == 0)) {
similarCutOff = 49000; // lower is harder
// do not increase, we will get false positive
if (h264) similarCutOff = 196000; // reduce false similar detection in H.264 streams
similarMinLength = 4040; // shortest valid length of an overlap with 4040ms found
}
if (beforeAd) {
#ifdef DEBUG_OVERLAP
dsyslog("cOverlapAroundAd::Process(): preload histogram with frames before stop mark, frame index %d of %d", histcnt[OV_BEFORE], frameCount - 1);
#endif
// alloc memory for frames before stop mark
if (!histbuf[OV_BEFORE]) {
histframes[OV_BEFORE] = frameCount;
histbuf[OV_BEFORE] = new sHistBuffer[frameCount + 1];
ALLOC(sizeof(*histbuf[OV_BEFORE]), "histbuf");
}
// fill histogram for frames before stop mark
if (histcnt[OV_BEFORE] >= frameCount) {
dsyslog("cOverlapAroundAd::Process(): got more frames before stop mark than expected");
return;
}
GetHistogram(picture, histbuf[OV_BEFORE][histcnt[OV_BEFORE]].histogram);
histbuf[OV_BEFORE][histcnt[OV_BEFORE]].valid = true;
histbuf[OV_BEFORE][histcnt[OV_BEFORE]].frameNumber = picture->packetNumber;
histbuf[OV_BEFORE][histcnt[OV_BEFORE]].pts = picture->pts;
histcnt[OV_BEFORE]++;
}
else {
#ifdef DEBUG_OVERLAP
dsyslog("cOverlapAroundAd::Process(): preload histogram with frames after start mark, frame index %d of %d", histcnt[OV_AFTER], frameCount - 1);
#endif
// alloc memory for frames after start mark
if (!histbuf[OV_AFTER]) {
histframes[OV_AFTER] = frameCount;
histbuf[OV_AFTER] = new sHistBuffer[frameCount + 1];
ALLOC(sizeof(*histbuf[OV_AFTER]), "histbuf");
}
// fill histogram for frames before after start mark
if (histcnt[OV_AFTER] >= frameCount) {
dsyslog("cOverlapAroundAd::Process(): got more frames after start mark than expected");
return;
}
GetHistogram(picture, histbuf[OV_AFTER][histcnt[OV_AFTER]].histogram);
histbuf[OV_AFTER][histcnt[OV_AFTER]].valid = true;
histbuf[OV_AFTER][histcnt[OV_AFTER]].frameNumber = picture->packetNumber;
histbuf[OV_AFTER][histcnt[OV_AFTER]].pts = picture->pts;
histcnt[OV_AFTER]++;
}
lastFrameNumber = picture->packetNumber;
return;
}
void cOverlapAroundAd::Detect(sOverlapPos *overlapPos) {
if (!overlapPos) return;
int startAfterMark = 0;
int simLength = 0;
int simMax = 0;
int tmpindexAfterStartMark = 0;
int tmpindexBeforeStopMark = 0;
int firstSimilarBeforeStopMark = -1;
int firstSimilarAfterStartMark = -1;
int range = 1; // on a scene change we can miss the same picture
int frameRate = decoder->GetVideoFrameRate();
if (decoder->GetFullDecode()) range = 10; // we need more range with full decoding
for (int indexBeforeStopMark = 0; indexBeforeStopMark < histcnt[OV_BEFORE]; indexBeforeStopMark++) {
#ifdef DEBUG_OVERLAP
dsyslog("cOverlapAroundAd::Detect(): -------------------------------------------------------------------------------------------------------------");
dsyslog("cOverlapAroundAd::Detect(): testing frame (%5d) before stop mark, indexBeforeStopMark %d, against all frames after start mark", histbuf[OV_BEFORE][indexBeforeStopMark].frameNumber, indexBeforeStopMark);
#endif
if (startAfterMark == histcnt[OV_AFTER]) { // we reached end of range after start mark, reset state and contine with next frame before stop mark
startAfterMark = 0;
simLength = 0;
simMax = 0;
continue;
}
// check if histogram buffer before stop mark is valid
if (!histbuf[OV_BEFORE][indexBeforeStopMark].valid) {
dsyslog("cOverlapAroundAd::Detect(): histogram of frame (%d) before stop mark not valid, continue with next frame", histbuf[OV_BEFORE][indexBeforeStopMark].frameNumber);
}
for (int indexAfterStartMark = startAfterMark; indexAfterStartMark < histcnt[OV_AFTER]; indexAfterStartMark++) {
// check if histogram buffer after start mark is valid
if (!histbuf[OV_AFTER][indexAfterStartMark].valid) { // not valid, continue with next pair
indexBeforeStopMark++;
if (indexBeforeStopMark >= histcnt[OV_BEFORE]) break;
continue;
}
// check if pair is similar
int simil = AreSimilar(histbuf[OV_BEFORE][indexBeforeStopMark].histogram, histbuf[OV_AFTER][indexAfterStartMark].histogram);
if ((simLength >= 1800) && (simil < 0)) { // not similar, but if we had found at least a short similar part, check neighbour frames
int similBefore = -1;
int similAfter = -1;
for (int i = 1 ; i <= range; i++) {
if ((indexAfterStartMark - i) > 0) similBefore = AreSimilar(histbuf[OV_BEFORE][indexBeforeStopMark].histogram, histbuf[OV_AFTER][indexAfterStartMark - i].histogram);
if ((indexAfterStartMark + i) < histcnt[OV_AFTER]) similAfter = AreSimilar(histbuf[OV_BEFORE][indexBeforeStopMark].histogram, histbuf[OV_AFTER][indexAfterStartMark + i].histogram);
if ((similBefore >= 0) || (similAfter >= 0)) break;
}
if ((similBefore < 0) && (similAfter < 0)) { // we have reached end of a similar part
// tsyslog("cMarkAdOverlap::Detect(): end of similar from (%5d) to (%5d) and (%5d) to (%5d) length %5dms", histbuf[OV_BEFORE][firstSimilarBeforeStopMark].frameNumber, histbuf[OV_BEFORE][tmpindexBeforeStopMark].frameNumber, histbuf[OV_AFTER][firstSimilarAfterStartMark].frameNumber, histbuf[OV_AFTER][tmpindexAfterStartMark].frameNumber, simLength);
// tsyslog("cMarkAdOverlap::Detect(): with similBefore %5d, simil %5d, similAfter %5d", similBefore, simil, similAfter);
}
if (similBefore > 0) simil = similBefore;
if (similAfter > 0) simil = similAfter;
}
#ifdef DEBUG_OVERLAP
if (simil >= 0) dsyslog("cOverlapAroundAd::Detect(): +++++ similar frame (%5d) (index %3d) and (%5d) (index %3d) -> simil %5d (max %d) length %2dms similarMaxCnt %2d)", histbuf[OV_BEFORE][indexBeforeStopMark].frameNumber, indexBeforeStopMark, histbuf[OV_AFTER][indexAfterStartMark].frameNumber, indexAfterStartMark, simil, similarCutOff, simLength, similarMinLength);
#endif
// found long enough overlap, store position
if ((simLength >= similarMinLength) &&
((histbuf[OV_BEFORE][tmpindexBeforeStopMark].frameNumber - histbuf[OV_BEFORE][firstSimilarBeforeStopMark].frameNumber) >= (overlapPos->similarBeforeEndPacketNumber - overlapPos->similarBeforeStartPacketNumber))) { // new overlap is longer than current overlap
overlapPos->similarBeforeStartPacketNumber = histbuf[OV_BEFORE][firstSimilarBeforeStopMark].frameNumber;
overlapPos->similarBeforeStartPTS = histbuf[OV_BEFORE][firstSimilarBeforeStopMark].pts;
overlapPos->similarBeforeEndPacketNumber = histbuf[OV_BEFORE][tmpindexBeforeStopMark].frameNumber;
overlapPos->similarBeforeEndPTS = histbuf[OV_BEFORE][tmpindexBeforeStopMark].pts;
overlapPos->similarAfterStartPacketNumber = histbuf[OV_AFTER][firstSimilarAfterStartMark].frameNumber;
overlapPos->similarAfterStartPTS = histbuf[OV_AFTER][firstSimilarAfterStartMark].pts;
overlapPos->similarAfterEndPacketNumber = histbuf[OV_AFTER][tmpindexAfterStartMark].frameNumber;
overlapPos->similarAfterEndPTS = histbuf[OV_AFTER][tmpindexAfterStartMark].pts;
overlapPos->similarMax = simMax;
if (simil < 0) overlapPos->similarEnd = -simil;
}
if (simil >= 0) {
if (simLength == 0) { // this is the first similar frame pair, store position
firstSimilarBeforeStopMark = indexBeforeStopMark;
firstSimilarAfterStartMark = indexAfterStartMark;
}
tmpindexAfterStartMark = indexAfterStartMark;
tmpindexBeforeStopMark = indexBeforeStopMark;
startAfterMark = indexAfterStartMark + 1;
simLength = 1000 * (histbuf[OV_BEFORE][indexBeforeStopMark].frameNumber - histbuf[OV_BEFORE][firstSimilarBeforeStopMark].frameNumber + 1) / frameRate;
if (simil > simMax) simMax = simil;
#ifdef DEBUG_OVERLAP
dsyslog("cOverlapAroundAd::Detect(): similar picture index from %d to %d and %d to %d", firstSimilarBeforeStopMark, indexBeforeStopMark, firstSimilarAfterStartMark, indexAfterStartMark);
dsyslog("cOverlapAroundAd::Detect(): similar picture frames from (%d) to (%d) and (%d) to (%d), length %dms", histbuf[OV_BEFORE][firstSimilarBeforeStopMark].frameNumber, histbuf[OV_BEFORE][indexBeforeStopMark].frameNumber, histbuf[OV_AFTER][firstSimilarAfterStartMark].frameNumber, histbuf[OV_AFTER][indexAfterStartMark].frameNumber, simLength);
#endif
break;
}
else {
// reset to first similar frame
if (simLength > 0) {
#ifdef DEBUG_OVERLAP
dsyslog("cOverlapAroundAd::Detect(): ---- not similar frame (%5d) (index %3d) and (%5d) (index %3d) -> simil %5d (max %d) length %2dms similarMaxCnt %2d)", histbuf[OV_BEFORE][indexBeforeStopMark].frameNumber, indexBeforeStopMark, histbuf[OV_AFTER][indexAfterStartMark].frameNumber, indexAfterStartMark, simil, similarCutOff, simLength, similarMinLength);
dsyslog("cOverlapAroundAd::Detect(): ===================================================================================================================");
#endif
indexBeforeStopMark = firstSimilarBeforeStopMark; // reset to first similar frame
}
if (simLength < similarMinLength) startAfterMark = 0;
simLength = 0;
simMax = 0;
}
}
#ifdef DEBUG_OVERLAP
dsyslog("cOverlapAroundAd::Detect(): current overlap from (%d) to (%d) and (%d) to (%d)", overlapPos->similarBeforeStart, overlapPos->similarBeforeEnd, overlapPos->similarAfterStart, overlapPos->similarAfterEnd);
#endif
}
return;
}
void cOverlapAroundAd::GetHistogram(const sVideoPicture *picture, simpleHistogram &dest) const {
memset(dest, 0, sizeof(simpleHistogram));
int videoHeight = decoder->GetVideoHeight();
int videoWidth = decoder->GetVideoWidth();
int startY = videoHeight * 0.22; // ignore top part because there can be info border at start after the advertising, changed from 0.2 to 0.22
int endY = videoHeight * 0.82; // ignore bottom part because there can info border text at start after the advertising, changed from 0.87 to 0.82
for (int Y = startY; Y < endY; Y++) {
for (int X = 0; X < videoWidth; X++) {
uchar val = picture->plane[0][X + (Y * picture->planeLineSize[0])];
dest[val]++;
}
}
}
int cOverlapAroundAd::AreSimilar(const simpleHistogram &hist1, const simpleHistogram &hist2) const { // return > 0 if similar, else <= 0
long int similar = 0; // prevent integer overflow
for (int i = 0; i < 256; i++) {
similar += abs(hist1[i] - hist2[i]); // calculte difference, smaller is more similar
}
if (similar > INT_MAX) similar = INT_MAX; // we do need more
if (similar < similarCutOff) {
return similar;
}
return -similar;
}
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