func (self *SegMp4Header) updateCtts(fs *Mp4FileSpec, trakNum int) {
if fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.MinfAtomInstance.
StblAtomInstance.CttsAtomInstance.AllBytes == nil {
log.Println("trak has not ctts")
return
}
self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Ctts = fs.MoovAtomInstance.TrakAtomInstance[trakNum].
MdiaAtomInstance.MinfAtomInstance.StblAtomInstance.CttsAtomInstance.AllBytes
entriesNum := fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.CttsAtomInstance.EntriesNum
var i uint32
var posSample uint32
var count uint32
var rest uint32
posSample = self.startSample + 1
for i = 0; i < entriesNum; i++ {
count = fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.CttsAtomInstance.CttsDataTable[i][0]
if posSample <= count {
rest = posSample - 1
self.cttsSampleCountSegStart = i - 1
fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.CttsAtomInstance.CttsDataTable[i][0] =
count - rest
break
}
posSample -= count
}
posSample = self.endSample + 1
for i = 0; i < entriesNum; i++ {
count = fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.CttsAtomInstance.CttsDataTable[i][0]
if posSample <= count {
rest = posSample - 1
self.cttsSampleCountSegEnd = i
fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.CttsAtomInstance.CttsDataTable[i][0] =
rest
break
}
posSample -= count
}
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Ctts[0:4],
util.Uint32ToBytes(16+(self.cttsSampleCountSegEnd-self.cttsSampleCountSegStart)*8))
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Ctts[12:16],
util.Uint32ToBytes(self.cttsSampleCountSegEnd-self.cttsSampleCountSegStart))
//log.Println(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Ctts[12:16])
}
func (self *SegMp4Header) updateStss(fs *Mp4FileSpec, trakNum int) {
if fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.MinfAtomInstance.
StblAtomInstance.StssAtomInstance.AllBytes == nil {
log.Println("trak has not stss")
return
}
self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stss = fs.MoovAtomInstance.TrakAtomInstance[trakNum].
MdiaAtomInstance.MinfAtomInstance.StblAtomInstance.StssAtomInstance.AllBytes
entriesNum := fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StssAtomInstance.EntriesNum
//log.Println(fs.MoovAtomInstance.TrakAtomInstance[trakNum].
//MdiaAtomInstance.MinfAtomInstance.StblAtomInstance.StssAtomInstance.AllBytes)
var i uint32
for i = 0; i < entriesNum; i++ {
sample := fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StssAtomInstance.SyncSampleTable[i]
if sample > self.startSample {
//self.startSample = fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
//MinfAtomInstance.StblAtomInstance.StssAtomInstance.SyncSampleTable[i - 1]
break
}
}
for i = 0; i < entriesNum; i++ {
sample := fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StssAtomInstance.SyncSampleTable[i]
if sample > self.endSample {
//self.endSample = fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
//MinfAtomInstance.StblAtomInstance.StssAtomInstance.SyncSampleTable[i - 1]
break
}
}
var k uint32
k = 0
for i = 0; i < entriesNum; i++ {
sample := fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StssAtomInstance.SyncSampleTable[i]
if sample >= self.startSample && sample < self.endSample {
s := 16 + k*4
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stss[s:s+4],
util.Uint32ToBytes(sample-self.startSample))
self.syncSampleNum = k
k++
}
}
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stss[0:4],
util.Uint32ToBytes(16+(self.syncSampleNum+1)*4))
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stss[12:16],
util.Uint32ToBytes(self.syncSampleNum+1))
}
func (self *SegMp4Header) updateStts(fs *Mp4FileSpec, trakNum int) {
timeScale := fs.MoovAtomInstance.TrakAtomInstance[trakNum].
MdiaAtomInstance.MdhdAtomInstance.Timescale
self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stts = fs.MoovAtomInstance.TrakAtomInstance[trakNum].
MdiaAtomInstance.MinfAtomInstance.StblAtomInstance.SttsAtomInstance.AllBytes
entriesNum := fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.SttsAtomInstance.EntriesNum
startTime := timeScale * self.start
endTime := timeScale * self.end
var i uint32
var rest uint32
var count uint32
for i = 0; i < entriesNum; i++ {
count = fs.MoovAtomInstance.TrakAtomInstance[i].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.SttsAtomInstance.SampleCountDurationTable[i][0]
duration := fs.MoovAtomInstance.TrakAtomInstance[i].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.SttsAtomInstance.SampleCountDurationTable[i][1]
if startTime < count*duration {
rest = startTime / duration
s := 16 + i*8
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stts[s:s+4],
util.Uint32ToBytes(count-rest))
break
}
startTime -= count * duration
}
for i = 0; i < entriesNum; i++ {
count = fs.MoovAtomInstance.TrakAtomInstance[i].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.SttsAtomInstance.SampleCountDurationTable[i][0]
duration := fs.MoovAtomInstance.TrakAtomInstance[i].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.SttsAtomInstance.SampleCountDurationTable[i][1]
if endTime < count*duration {
//rest = (endTime - timeScale * self.start) / duration
rest = self.endSample - self.startSample
s := 16 + i*8
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stts[s:s+4],
util.Uint32ToBytes(rest))
self.sttsEntryNum = i
break
}
endTime -= count * duration
}
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stts[0:4],
util.Uint32ToBytes(16+(self.sttsEntryNum+1)*8))
}
func (self *SegMp4Header) updateTkhd(fs *Mp4FileSpec, trakNum int) {
self.Moov.Trak[trakNum].Tkhd = fs.MoovAtomInstance.TrakAtomInstance[trakNum].
TkhdAtomInstance.AllBytes
timeScale := fs.MoovAtomInstance.MvhdAtomInstance.Timescale
copy(self.Moov.Trak[trakNum].Tkhd[28:32],
util.Uint32ToBytes((self.end-self.start)*timeScale))
}
func (self *SegMp4Header) updateStsz(fs *Mp4FileSpec, trakNum int) {
self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stsz = fs.MoovAtomInstance.TrakAtomInstance[trakNum].
MdiaAtomInstance.MinfAtomInstance.StblAtomInstance.StszAtomInstance.AllBytes
//entriesNum := fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
//MinfAtomInstance.StblAtomInstance.StszAtomInstance.EntriesNum
if fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StszAtomInstance.SampleSize == 0 {
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stsz[0:4],
util.Uint32ToBytes(20+(self.endSample-self.startSample)*4))
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stsz[16:20],
util.Uint32ToBytes(self.endSample-self.startSample))
}
//log.Println(fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
//MinfAtomInstance.StblAtomInstance.StszAtomInstance.SampleSizeTable[self.startSample])
}
func (self *SegMp4Header) updateMvhd(fs *Mp4FileSpec) {
self.Moov.Mvhd = fs.MoovAtomInstance.MvhdAtomInstance.AllBytes
timeScale := fs.MoovAtomInstance.MvhdAtomInstance.Timescale
copy(self.Moov.Mvhd[24:28], util.Uint32ToBytes((self.end-self.start)*
timeScale))
}
func (self *SegMp4Header) updateStsc(fs *Mp4FileSpec, trakNum int) {
if fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.MinfAtomInstance.
StblAtomInstance.StscAtomInstance.AllBytes == nil {
log.Println("trak has not stsc")
return
}
self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stsc = fs.MoovAtomInstance.TrakAtomInstance[trakNum].
MdiaAtomInstance.MinfAtomInstance.StblAtomInstance.StscAtomInstance.AllBytes
entriesNum := fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StscAtomInstance.EntriesNum
var i uint32
var chunkNum uint32
var nextChunkNum uint32
var sampleNum uint32
//var pre uint32
var totalChunkNum uint32
var offset uint32
//pre = 0
totalChunkNum = 0
//log.Println(self.startSample)
for i = 0; i < entriesNum; i++ {
chunkNum = fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StscAtomInstance.Sample2ChunkTable[i][0]
nextChunkNum = fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StscAtomInstance.Sample2ChunkTable[i+1][0]
sampleNum = fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StscAtomInstance.Sample2ChunkTable[i][1]
totalChunkNum += (nextChunkNum - chunkNum) * sampleNum
if self.startSample <= totalChunkNum {
self.stscSegStart = i - 1
self.stscSegStart += (totalChunkNum - self.startSample) / sampleNum
offset = i - 1 - 1
log.Println(chunkNum)
log.Println(self.stscSegStart)
log.Println(totalChunkNum)
break
}
//pre = chunkNum
}
//pre = 0
i = 0
totalChunkNum = 0
for i = 0; i < entriesNum; i++ {
chunkNum = fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StscAtomInstance.Sample2ChunkTable[i][0]
nextChunkNum = fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StscAtomInstance.Sample2ChunkTable[i+1][0]
sampleNum = fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StscAtomInstance.Sample2ChunkTable[i][1]
totalChunkNum += (nextChunkNum - chunkNum) * sampleNum
if self.endSample <= totalChunkNum {
self.stscSegEnd = i - 1
log.Println(chunkNum)
self.stscSegEnd += (totalChunkNum - self.endSample) / sampleNum
log.Println(totalChunkNum)
break
}
//pre = chunkNum
}
//log.Println(offset)
for i = self.stscSegStart; i < self.stscSegEnd; i++ {
chunkNum = fs.MoovAtomInstance.TrakAtomInstance[trakNum].MdiaAtomInstance.
MinfAtomInstance.StblAtomInstance.StscAtomInstance.Sample2ChunkTable[i][0]
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stsc[16+i*12:16+i*12+4],
util.Uint32ToBytes(i-offset))
}
//log.Println(self.stscSegStart)
//log.Println(self.stscSegEnd)
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stsc[0:4],
util.Uint32ToBytes(16+(self.stscSegEnd-self.stscSegStart)*12))
copy(self.Moov.Trak[trakNum].Mdia.Minf.Stbl.Stsc[12:16],
util.Uint32ToBytes(self.stscSegEnd-self.stscSegStart))
}