// update the absolute positional information (distance from the BOF or EOF)
// for keyFrames based on the other keyFrames in the signature
func updatePositions(ks []keyFrame) {
var min, max int64
// first forwards, for BOF and PREV
for i := range ks {
if ks[i].typ == frames.BOF {
min, max = calcMinMax(0, 0, ks[i].seg)
// Apply max bof
if config.MaxBOF() > 0 {
if ks[i].key.pMax < 0 || ks[i].key.pMax > int64(config.MaxBOF()) {
ks[i].key.pMax = int64(config.MaxBOF())
}
}
}
if ks[i].typ == frames.PREV {
ks[i].key.pMin = min + ks[i].key.pMin
if max > -1 && ks[i].key.pMax > -1 {
ks[i].key.pMax = max + ks[i].key.pMax
} else {
ks[i].key.pMax = -1
}
min, max = calcMinMax(min, max, ks[i].seg)
// Apply max bof
if config.MaxBOF() > 0 {
if ks[i].key.pMax < 0 || ks[i].key.pMax > int64(config.MaxBOF()) {
ks[i].key.pMax = int64(config.MaxBOF())
}
}
}
}
// now backwards for EOF and SUCC
min, max = 0, 0
for i := len(ks) - 1; i >= 0; i-- {
if ks[i].typ == frames.EOF {
min, max = calcMinMax(0, 0, ks[i].seg)
// apply max eof
if config.MaxEOF() > 0 {
if ks[i].key.pMax < 0 || ks[i].key.pMax > int64(config.MaxEOF()) {
ks[i].key.pMax = int64(config.MaxEOF())
}
}
}
if ks[i].typ == frames.SUCC {
ks[i].key.pMin = min + ks[i].key.pMin
if max > -1 && ks[i].key.pMax > -1 {
ks[i].key.pMax = max + ks[i].key.pMax
} else {
ks[i].key.pMax = -1
}
min, max = calcMinMax(min, max, ks[i].seg)
// apply max eof
if config.MaxEOF() > 0 {
if ks[i].key.pMax < 0 || ks[i].key.pMax > int64(config.MaxEOF()) {
ks[i].key.pMax = int64(config.MaxEOF())
}
}
}
}
}
func ApplyConfig(p Parseable) Parseable {
if config.NoName() {
p = noName{p}
}
if config.NoMIME() {
p = noMIME{p}
}
if config.NoXML() {
p = noXML{p}
}
if config.NoContainer() {
p = noContainers{p}
}
if config.NoRIFF() {
p = noRIFF{p}
}
if config.NoText() {
p = noText{p}
}
if config.NoPriority() {
p = noPriority{p}
}
// mirror PREV wild segments into EOF if maxBof and maxEOF set
if config.MaxBOF() > 0 && config.MaxEOF() > 0 {
p = Mirror{p}
}
if config.HasLimit() || config.HasExclude() {
ids := p.IDs()
if config.HasLimit() {
ids = config.Limit(ids)
} else {
ids = config.Exclude(ids)
}
p = Filter(ids, p)
}
return p
}