110 lines
1.8 KiB
Go
110 lines
1.8 KiB
Go
|
|
package ts
|
|
|
|
import (
|
|
"fmt"
|
|
)
|
|
|
|
const debug = true
|
|
|
|
const (
|
|
ElementaryStreamTypeH264 = 0x1B
|
|
ElementaryStreamTypeAdtsAAC = 0x0F
|
|
)
|
|
|
|
type TSHeader struct {
|
|
PID uint
|
|
PCR uint64
|
|
OPCR uint64
|
|
ContinuityCounter uint
|
|
PayloadUnitStart bool
|
|
RandomAccessIndicator bool
|
|
}
|
|
|
|
type PATEntry struct {
|
|
ProgramNumber uint
|
|
NetworkPID uint
|
|
ProgramMapPID uint
|
|
}
|
|
|
|
type PAT struct {
|
|
Entries []PATEntry
|
|
}
|
|
|
|
type PMT struct {
|
|
PCRPID uint
|
|
ProgramDescriptors []Descriptor
|
|
ElementaryStreamInfos []ElementaryStreamInfo
|
|
}
|
|
|
|
type Descriptor struct {
|
|
Tag uint
|
|
Data []byte
|
|
}
|
|
|
|
type ElementaryStreamInfo struct {
|
|
StreamType uint
|
|
ElementaryPID uint
|
|
Descriptors []Descriptor
|
|
}
|
|
|
|
type PSI struct {
|
|
TableIdExtension uint
|
|
TableId uint
|
|
SecNum uint
|
|
LastSecNum uint
|
|
}
|
|
|
|
type PESHeader struct {
|
|
StreamId uint // H264=0xe0 AAC=0xc0
|
|
DataLength uint
|
|
PTS uint64
|
|
DTS uint64
|
|
ESCR uint64
|
|
}
|
|
|
|
func PESUIntToTs(v uint64) (ts uint64) {
|
|
// 0010 PTS 32..30 1 PTS 29..15 1 PTS 14..00 1
|
|
return (((v>>33)&0x7)<<30) | (((v>>17)&0x7fff)<<15) | ((v>>1)&0x7fff)
|
|
}
|
|
|
|
func PESTsToUInt(ts uint64) (v uint64) {
|
|
// 0010 PTS 32..30 1 PTS 29..15 1 PTS 14..00 1
|
|
return ((ts>>30)&0x7)<<33 | ((ts>>15)&0x7fff)<<17 | (v&0x7fff)<<1 | 0x100010001
|
|
}
|
|
|
|
func UIntToPCR(v uint64) uint64 {
|
|
// base(33)+resverd(6)+ext(9)
|
|
base := v>>15
|
|
ext := v&0x1ff
|
|
return base*300+ext
|
|
}
|
|
|
|
func PCRToUInt(pcr uint64) uint64 {
|
|
base := pcr/300
|
|
ext := pcr%300
|
|
return base<<15|0x3f<<9|ext
|
|
}
|
|
|
|
type FieldsDumper struct {
|
|
Fields []struct {
|
|
Length int
|
|
Desc string
|
|
}
|
|
Val uint
|
|
Length uint
|
|
}
|
|
|
|
func (self FieldsDumper) String() (res string) {
|
|
pos := uint(self.Length)
|
|
for _, field := range self.Fields {
|
|
pos -= uint(field.Length)
|
|
val := (self.Val>>pos)&(1<<uint(field.Length)-1)
|
|
if val != 0 {
|
|
res += fmt.Sprintf("%s=%x ", field.Desc, val)
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|