first commit
This commit is contained in:
Andrey Semochkin
55
format/ts/tsio/checksum.go
Normal file
55
format/ts/tsio/checksum.go
Normal file
@@ -0,0 +1,55 @@
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package tsio
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var ieeeCrc32Tbl = []uint32{
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0x00000000, 0xB71DC104, 0x6E3B8209, 0xD926430D, 0xDC760413, 0x6B6BC517,
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0xB24D861A, 0x0550471E, 0xB8ED0826, 0x0FF0C922, 0xD6D68A2F, 0x61CB4B2B,
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0x649B0C35, 0xD386CD31, 0x0AA08E3C, 0xBDBD4F38, 0x70DB114C, 0xC7C6D048,
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0x1EE09345, 0xA9FD5241, 0xACAD155F, 0x1BB0D45B, 0xC2969756, 0x758B5652,
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0xC836196A, 0x7F2BD86E, 0xA60D9B63, 0x11105A67, 0x14401D79, 0xA35DDC7D,
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0x7A7B9F70, 0xCD665E74, 0xE0B62398, 0x57ABE29C, 0x8E8DA191, 0x39906095,
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0x3CC0278B, 0x8BDDE68F, 0x52FBA582, 0xE5E66486, 0x585B2BBE, 0xEF46EABA,
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0x3660A9B7, 0x817D68B3, 0x842D2FAD, 0x3330EEA9, 0xEA16ADA4, 0x5D0B6CA0,
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0x906D32D4, 0x2770F3D0, 0xFE56B0DD, 0x494B71D9, 0x4C1B36C7, 0xFB06F7C3,
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0x2220B4CE, 0x953D75CA, 0x28803AF2, 0x9F9DFBF6, 0x46BBB8FB, 0xF1A679FF,
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0xF4F63EE1, 0x43EBFFE5, 0x9ACDBCE8, 0x2DD07DEC, 0x77708634, 0xC06D4730,
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0x194B043D, 0xAE56C539, 0xAB068227, 0x1C1B4323, 0xC53D002E, 0x7220C12A,
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0xCF9D8E12, 0x78804F16, 0xA1A60C1B, 0x16BBCD1F, 0x13EB8A01, 0xA4F64B05,
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0x7DD00808, 0xCACDC90C, 0x07AB9778, 0xB0B6567C, 0x69901571, 0xDE8DD475,
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0xDBDD936B, 0x6CC0526F, 0xB5E61162, 0x02FBD066, 0xBF469F5E, 0x085B5E5A,
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0xD17D1D57, 0x6660DC53, 0x63309B4D, 0xD42D5A49, 0x0D0B1944, 0xBA16D840,
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0x97C6A5AC, 0x20DB64A8, 0xF9FD27A5, 0x4EE0E6A1, 0x4BB0A1BF, 0xFCAD60BB,
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0x258B23B6, 0x9296E2B2, 0x2F2BAD8A, 0x98366C8E, 0x41102F83, 0xF60DEE87,
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0xF35DA999, 0x4440689D, 0x9D662B90, 0x2A7BEA94, 0xE71DB4E0, 0x500075E4,
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0x892636E9, 0x3E3BF7ED, 0x3B6BB0F3, 0x8C7671F7, 0x555032FA, 0xE24DF3FE,
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0x5FF0BCC6, 0xE8ED7DC2, 0x31CB3ECF, 0x86D6FFCB, 0x8386B8D5, 0x349B79D1,
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0xEDBD3ADC, 0x5AA0FBD8, 0xEEE00C69, 0x59FDCD6D, 0x80DB8E60, 0x37C64F64,
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0x3296087A, 0x858BC97E, 0x5CAD8A73, 0xEBB04B77, 0x560D044F, 0xE110C54B,
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0x38368646, 0x8F2B4742, 0x8A7B005C, 0x3D66C158, 0xE4408255, 0x535D4351,
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0x9E3B1D25, 0x2926DC21, 0xF0009F2C, 0x471D5E28, 0x424D1936, 0xF550D832,
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0x2C769B3F, 0x9B6B5A3B, 0x26D61503, 0x91CBD407, 0x48ED970A, 0xFFF0560E,
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0xFAA01110, 0x4DBDD014, 0x949B9319, 0x2386521D, 0x0E562FF1, 0xB94BEEF5,
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0x606DADF8, 0xD7706CFC, 0xD2202BE2, 0x653DEAE6, 0xBC1BA9EB, 0x0B0668EF,
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0xB6BB27D7, 0x01A6E6D3, 0xD880A5DE, 0x6F9D64DA, 0x6ACD23C4, 0xDDD0E2C0,
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0x04F6A1CD, 0xB3EB60C9, 0x7E8D3EBD, 0xC990FFB9, 0x10B6BCB4, 0xA7AB7DB0,
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0xA2FB3AAE, 0x15E6FBAA, 0xCCC0B8A7, 0x7BDD79A3, 0xC660369B, 0x717DF79F,
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0xA85BB492, 0x1F467596, 0x1A163288, 0xAD0BF38C, 0x742DB081, 0xC3307185,
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0x99908A5D, 0x2E8D4B59, 0xF7AB0854, 0x40B6C950, 0x45E68E4E, 0xF2FB4F4A,
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0x2BDD0C47, 0x9CC0CD43, 0x217D827B, 0x9660437F, 0x4F460072, 0xF85BC176,
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0xFD0B8668, 0x4A16476C, 0x93300461, 0x242DC565, 0xE94B9B11, 0x5E565A15,
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0x87701918, 0x306DD81C, 0x353D9F02, 0x82205E06, 0x5B061D0B, 0xEC1BDC0F,
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0x51A69337, 0xE6BB5233, 0x3F9D113E, 0x8880D03A, 0x8DD09724, 0x3ACD5620,
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0xE3EB152D, 0x54F6D429, 0x7926A9C5, 0xCE3B68C1, 0x171D2BCC, 0xA000EAC8,
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0xA550ADD6, 0x124D6CD2, 0xCB6B2FDF, 0x7C76EEDB, 0xC1CBA1E3, 0x76D660E7,
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0xAFF023EA, 0x18EDE2EE, 0x1DBDA5F0, 0xAAA064F4, 0x738627F9, 0xC49BE6FD,
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0x09FDB889, 0xBEE0798D, 0x67C63A80, 0xD0DBFB84, 0xD58BBC9A, 0x62967D9E,
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0xBBB03E93, 0x0CADFF97, 0xB110B0AF, 0x060D71AB, 0xDF2B32A6, 0x6836F3A2,
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0x6D66B4BC, 0xDA7B75B8, 0x035D36B5, 0xB440F7B1, 0x00000001,
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}
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func calcCRC32(crc uint32, data []byte) uint32 {
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for _, b := range data {
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crc = ieeeCrc32Tbl[b^byte(crc)] ^ (crc >> 8)
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}
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return crc
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}
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589
format/ts/tsio/tsio.go
Normal file
589
format/ts/tsio/tsio.go
Normal file
@@ -0,0 +1,589 @@
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package tsio
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import (
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"fmt"
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"io"
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"time"
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"github.com/deepch/vdk/utils/bits/pio"
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)
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const (
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StreamIdH264 = 0xe0
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StreamIdAAC = 0xc0
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)
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const (
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PAT_PID = 0
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PMT_PID = 0x1000
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)
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const TableIdPMT = 2
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const TableExtPMT = 1
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const TableIdPAT = 0
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const TableExtPAT = 1
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const MaxPESHeaderLength = 19
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const MaxTSHeaderLength = 12
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var ErrPESHeader = fmt.Errorf("invalid PES header")
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var ErrPSIHeader = fmt.Errorf("invalid PSI header")
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var ErrParsePMT = fmt.Errorf("invalid PMT")
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var ErrParsePAT = fmt.Errorf("invalid PAT")
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const (
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ElementaryStreamTypeH264 = 0x1B
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ElementaryStreamTypeAdtsAAC = 0x0F
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)
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type PATEntry struct {
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ProgramNumber uint16
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NetworkPID uint16
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ProgramMapPID uint16
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}
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type PAT struct {
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Entries []PATEntry
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}
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func (self PAT) Len() (n int) {
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return len(self.Entries) * 4
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}
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func (self PAT) Marshal(b []byte) (n int) {
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for _, entry := range self.Entries {
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pio.PutU16BE(b[n:], entry.ProgramNumber)
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n += 2
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if entry.ProgramNumber == 0 {
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pio.PutU16BE(b[n:], entry.NetworkPID&0x1fff|7<<13)
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n += 2
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} else {
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pio.PutU16BE(b[n:], entry.ProgramMapPID&0x1fff|7<<13)
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n += 2
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}
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}
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return
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}
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func (self *PAT) Unmarshal(b []byte) (n int, err error) {
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for n < len(b) {
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if n+4 <= len(b) {
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var entry PATEntry
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entry.ProgramNumber = pio.U16BE(b[n:])
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n += 2
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if entry.ProgramNumber == 0 {
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entry.NetworkPID = pio.U16BE(b[n:]) & 0x1fff
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n += 2
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} else {
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entry.ProgramMapPID = pio.U16BE(b[n:]) & 0x1fff
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n += 2
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}
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self.Entries = append(self.Entries, entry)
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} else {
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break
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}
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}
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if n < len(b) {
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err = ErrParsePAT
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return
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}
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return
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}
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type Descriptor struct {
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Tag uint8
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Data []byte
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}
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type ElementaryStreamInfo struct {
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StreamType uint8
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ElementaryPID uint16
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Descriptors []Descriptor
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}
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type PMT struct {
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PCRPID uint16
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ProgramDescriptors []Descriptor
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ElementaryStreamInfos []ElementaryStreamInfo
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}
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func (self PMT) Len() (n int) {
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// 111(3)
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// PCRPID(13)
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n += 2
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// desclen(16)
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n += 2
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for _, desc := range self.ProgramDescriptors {
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n += 2 + len(desc.Data)
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}
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for _, info := range self.ElementaryStreamInfos {
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// streamType
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n += 1
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// Reserved(3)
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// Elementary PID(13)
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n += 2
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// Reserved(6)
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// ES Info length length(10)
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n += 2
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for _, desc := range info.Descriptors {
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n += 2 + len(desc.Data)
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}
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}
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return
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}
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func (self PMT) fillDescs(b []byte, descs []Descriptor) (n int) {
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for _, desc := range descs {
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b[n] = desc.Tag
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n++
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b[n] = uint8(len(desc.Data))
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n++
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copy(b[n:], desc.Data)
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n += len(desc.Data)
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}
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return
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}
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func (self PMT) Marshal(b []byte) (n int) {
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// 111(3)
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// PCRPID(13)
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pio.PutU16BE(b[n:], self.PCRPID|7<<13)
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n += 2
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hold := n
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n += 2
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pos := n
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n += self.fillDescs(b[n:], self.ProgramDescriptors)
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desclen := n - pos
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pio.PutU16BE(b[hold:], uint16(desclen)|0xf<<12)
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for _, info := range self.ElementaryStreamInfos {
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b[n] = info.StreamType
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n++
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// Reserved(3)
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// Elementary PID(13)
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pio.PutU16BE(b[n:], info.ElementaryPID|7<<13)
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n += 2
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hold := n
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n += 2
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pos := n
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n += self.fillDescs(b[n:], info.Descriptors)
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desclen := n - pos
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pio.PutU16BE(b[hold:], uint16(desclen)|0x3c<<10)
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}
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return
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}
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func (self PMT) parseDescs(b []byte) (descs []Descriptor, err error) {
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n := 0
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for n < len(b) {
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if n+2 <= len(b) {
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desc := Descriptor{}
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desc.Tag = b[n]
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desc.Data = make([]byte, b[n+1])
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n += 2
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if n+len(desc.Data) < len(b) {
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copy(desc.Data, b[n:])
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descs = append(descs, desc)
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n += len(desc.Data)
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} else {
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break
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}
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} else {
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break
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}
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}
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if n < len(b) {
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err = ErrParsePMT
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return
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}
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return
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}
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func (self *PMT) Unmarshal(b []byte) (n int, err error) {
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if len(b) < n+4 {
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err = ErrParsePMT
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return
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}
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// 111(3)
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// PCRPID(13)
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self.PCRPID = pio.U16BE(b[0:2]) & 0x1fff
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n += 2
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// Reserved(4)=0xf
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// Reserved(2)=0x0
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// Program info length(10)
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desclen := int(pio.U16BE(b[2:4]) & 0x3ff)
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n += 2
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if desclen > 0 {
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if len(b) < n+desclen {
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err = ErrParsePMT
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return
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}
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if self.ProgramDescriptors, err = self.parseDescs(b[n : n+desclen]); err != nil {
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return
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}
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n += desclen
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}
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for n < len(b) {
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if len(b) < n+5 {
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err = ErrParsePMT
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return
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}
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var info ElementaryStreamInfo
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info.StreamType = b[n]
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n++
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// Reserved(3)
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// Elementary PID(13)
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info.ElementaryPID = pio.U16BE(b[n:]) & 0x1fff
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n += 2
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// Reserved(6)
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// ES Info length(10)
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desclen := int(pio.U16BE(b[n:]) & 0x3ff)
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n += 2
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if desclen > 0 {
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if len(b) < n+desclen {
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err = ErrParsePMT
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return
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}
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if info.Descriptors, err = self.parseDescs(b[n : n+desclen]); err != nil {
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return
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}
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n += desclen
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}
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self.ElementaryStreamInfos = append(self.ElementaryStreamInfos, info)
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}
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return
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}
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func ParsePSI(h []byte) (tableid uint8, tableext uint16, hdrlen int, datalen int, err error) {
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if len(h) < 8 {
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err = ErrPSIHeader
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return
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}
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// pointer(8)
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pointer := h[0]
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hdrlen++
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if pointer > 0 {
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hdrlen += int(pointer)
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if len(h) < hdrlen {
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err = ErrPSIHeader
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return
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}
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}
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if len(h) < hdrlen+12 {
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err = ErrPSIHeader
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return
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}
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// table_id(8)
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tableid = h[hdrlen]
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hdrlen++
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// section_syntax_indicator(1)=1,private_bit(1)=0,reserved(2)=3,unused(2)=0,section_length(10)
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datalen = int(pio.U16BE(h[hdrlen:]))&0x3ff - 9
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hdrlen += 2
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if datalen < 0 {
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err = ErrPSIHeader
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return
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}
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// Table ID extension(16)
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tableext = pio.U16BE(h[hdrlen:])
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hdrlen += 2
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// resverd(2)=3
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// version(5)
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// Current_next_indicator(1)
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hdrlen++
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// section_number(8)
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hdrlen++
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// last_section_number(8)
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hdrlen++
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// data
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// crc(32)
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return
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}
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const PSIHeaderLength = 9
|
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func FillPSI(h []byte, tableid uint8, tableext uint16, datalen int) (n int) {
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// pointer(8)
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h[n] = 0
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n++
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||||
// table_id(8)
|
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h[n] = tableid
|
||||
n++
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// section_syntax_indicator(1)=1,private_bit(1)=0,reserved(2)=3,unused(2)=0,section_length(10)
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pio.PutU16BE(h[n:], uint16(0xa<<12|2+3+4+datalen))
|
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n += 2
|
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// Table ID extension(16)
|
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pio.PutU16BE(h[n:], tableext)
|
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n += 2
|
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// resverd(2)=3,version(5)=0,Current_next_indicator(1)=1
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h[n] = 0x3<<6 | 1
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n++
|
||||
|
||||
// section_number(8)
|
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h[n] = 0
|
||||
n++
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||||
|
||||
// last_section_number(8)
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h[n] = 0
|
||||
n++
|
||||
|
||||
n += datalen
|
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|
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crc := calcCRC32(0xffffffff, h[1:n])
|
||||
pio.PutU32LE(h[n:], crc)
|
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n += 4
|
||||
|
||||
return
|
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}
|
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|
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func TimeToPCR(tm time.Duration) (pcr uint64) {
|
||||
// base(33)+resverd(6)+ext(9)
|
||||
ts := uint64(tm * PCR_HZ / time.Second)
|
||||
base := ts / 300
|
||||
ext := ts % 300
|
||||
pcr = base<<15 | 0x3f<<9 | ext
|
||||
return
|
||||
}
|
||||
|
||||
func PCRToTime(pcr uint64) (tm time.Duration) {
|
||||
base := pcr >> 15
|
||||
ext := pcr & 0x1ff
|
||||
ts := base*300 + ext
|
||||
tm = time.Duration(ts) * time.Second / time.Duration(PCR_HZ)
|
||||
return
|
||||
}
|
||||
|
||||
func TimeToTs(tm time.Duration) (v uint64) {
|
||||
ts := uint64(tm * PTS_HZ / time.Second)
|
||||
// 0010 PTS 32..30 1 PTS 29..15 1 PTS 14..00 1
|
||||
v = ((ts>>30)&0x7)<<33 | ((ts>>15)&0x7fff)<<17 | (ts&0x7fff)<<1 | 0x100010001
|
||||
return
|
||||
}
|
||||
|
||||
func TsToTime(v uint64) (tm time.Duration) {
|
||||
// 0010 PTS 32..30 1 PTS 29..15 1 PTS 14..00 1
|
||||
ts := (((v >> 33) & 0x7) << 30) | (((v >> 17) & 0x7fff) << 15) | ((v >> 1) & 0x7fff)
|
||||
tm = time.Duration(ts) * time.Second / time.Duration(PTS_HZ)
|
||||
return
|
||||
}
|
||||
|
||||
const (
|
||||
PTS_HZ = 90000
|
||||
PCR_HZ = 27000000
|
||||
)
|
||||
|
||||
func ParsePESHeader(h []byte) (hdrlen int, streamid uint8, datalen int, pts, dts time.Duration, err error) {
|
||||
if h[0] != 0 || h[1] != 0 || h[2] != 1 {
|
||||
err = ErrPESHeader
|
||||
return
|
||||
}
|
||||
streamid = h[3]
|
||||
|
||||
flags := h[7]
|
||||
hdrlen = int(h[8]) + 9
|
||||
|
||||
datalen = int(pio.U16BE(h[4:6]))
|
||||
if datalen > 0 {
|
||||
datalen -= int(h[8]) + 3
|
||||
}
|
||||
|
||||
const PTS = 1 << 7
|
||||
const DTS = 1 << 6
|
||||
|
||||
if flags&PTS != 0 {
|
||||
if len(h) < 14 {
|
||||
err = ErrPESHeader
|
||||
return
|
||||
}
|
||||
pts = TsToTime(pio.U40BE(h[9:14]))
|
||||
if flags&DTS != 0 {
|
||||
if len(h) < 19 {
|
||||
err = ErrPESHeader
|
||||
return
|
||||
}
|
||||
dts = TsToTime(pio.U40BE(h[14:19]))
|
||||
}
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
func FillPESHeader(h []byte, streamid uint8, datalen int, pts, dts time.Duration) (n int) {
|
||||
h[0] = 0
|
||||
h[1] = 0
|
||||
h[2] = 1
|
||||
h[3] = streamid
|
||||
|
||||
const PTS = 1 << 7
|
||||
const DTS = 1 << 6
|
||||
|
||||
var flags uint8
|
||||
if pts != 0 {
|
||||
flags |= PTS
|
||||
if dts != 0 {
|
||||
flags |= DTS
|
||||
}
|
||||
}
|
||||
|
||||
if flags&PTS != 0 {
|
||||
n += 5
|
||||
}
|
||||
if flags&DTS != 0 {
|
||||
n += 5
|
||||
}
|
||||
|
||||
// packet_length(16) if zero then variable length
|
||||
// Specifies the number of bytes remaining in the packet after this field. Can be zero.
|
||||
// If the PES packet length is set to zero, the PES packet can be of any length.
|
||||
// A value of zero for the PES packet length can be used only when the PES packet payload is a **video** elementary stream.
|
||||
var pktlen uint16
|
||||
if datalen >= 0 {
|
||||
pktlen = uint16(datalen + n + 3)
|
||||
}
|
||||
pio.PutU16BE(h[4:6], pktlen)
|
||||
|
||||
h[6] = 2<<6 | 1 // resverd(6,2)=2,original_or_copy(0,1)=1
|
||||
h[7] = flags
|
||||
h[8] = uint8(n)
|
||||
|
||||
// pts(40)?
|
||||
// dts(40)?
|
||||
if flags&PTS != 0 {
|
||||
if flags&DTS != 0 {
|
||||
pio.PutU40BE(h[9:14], TimeToTs(pts)|3<<36)
|
||||
pio.PutU40BE(h[14:19], TimeToTs(dts)|1<<36)
|
||||
} else {
|
||||
pio.PutU40BE(h[9:14], TimeToTs(pts)|2<<36)
|
||||
}
|
||||
}
|
||||
|
||||
n += 9
|
||||
return
|
||||
}
|
||||
|
||||
type TSWriter struct {
|
||||
w io.Writer
|
||||
ContinuityCounter uint
|
||||
tshdr []byte
|
||||
}
|
||||
|
||||
func NewTSWriter(pid uint16) *TSWriter {
|
||||
w := &TSWriter{}
|
||||
w.tshdr = make([]byte, 188)
|
||||
w.tshdr[0] = 0x47
|
||||
pio.PutU16BE(w.tshdr[1:3], pid&0x1fff)
|
||||
for i := 6; i < 188; i++ {
|
||||
w.tshdr[i] = 0xff
|
||||
}
|
||||
return w
|
||||
}
|
||||
|
||||
func (self *TSWriter) WritePackets(w io.Writer, datav [][]byte, pcr time.Duration, sync bool, paddata bool) (err error) {
|
||||
datavlen := pio.VecLen(datav)
|
||||
writev := make([][]byte, len(datav))
|
||||
writepos := 0
|
||||
|
||||
for writepos < datavlen {
|
||||
self.tshdr[1] = self.tshdr[1] & 0x1f
|
||||
self.tshdr[3] = byte(self.ContinuityCounter)&0xf | 0x30
|
||||
self.tshdr[5] = 0 // flags
|
||||
hdrlen := 6
|
||||
self.ContinuityCounter++
|
||||
|
||||
if writepos == 0 {
|
||||
self.tshdr[1] = 0x40 | self.tshdr[1] // Payload Unit Start Indicator
|
||||
if pcr != 0 {
|
||||
hdrlen += 6
|
||||
self.tshdr[5] = 0x10 | self.tshdr[5] // PCR flag (Discontinuity indicator 0x80)
|
||||
pio.PutU48BE(self.tshdr[6:12], TimeToPCR(pcr))
|
||||
}
|
||||
if sync {
|
||||
self.tshdr[5] = 0x40 | self.tshdr[5] // Random Access indicator
|
||||
}
|
||||
}
|
||||
|
||||
padtail := 0
|
||||
end := writepos + 188 - hdrlen
|
||||
if end > datavlen {
|
||||
if paddata {
|
||||
padtail = end - datavlen
|
||||
} else {
|
||||
hdrlen += end - datavlen
|
||||
}
|
||||
end = datavlen
|
||||
}
|
||||
n := pio.VecSliceTo(datav, writev, writepos, end)
|
||||
|
||||
self.tshdr[4] = byte(hdrlen) - 5 // length
|
||||
if _, err = w.Write(self.tshdr[:hdrlen]); err != nil {
|
||||
return
|
||||
}
|
||||
for i := 0; i < n; i++ {
|
||||
if _, err = w.Write(writev[i]); err != nil {
|
||||
return
|
||||
}
|
||||
}
|
||||
if padtail > 0 {
|
||||
if _, err = w.Write(self.tshdr[188-padtail : 188]); err != nil {
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
writepos = end
|
||||
}
|
||||
|
||||
return
|
||||
}
|
||||
|
||||
func ParseTSHeader(tshdr []byte) (pid uint16, start bool, iskeyframe bool, hdrlen int, err error) {
|
||||
// https://en.wikipedia.org/wiki/MPEG_transport_stream
|
||||
if tshdr[0] != 0x47 {
|
||||
err = fmt.Errorf("tshdr sync invalid")
|
||||
return
|
||||
}
|
||||
pid = uint16((tshdr[1]&0x1f))<<8 | uint16(tshdr[2])
|
||||
start = tshdr[1]&0x40 != 0
|
||||
hdrlen += 4
|
||||
if tshdr[3]&0x20 != 0 {
|
||||
hdrlen += int(tshdr[4]) + 1
|
||||
iskeyframe = tshdr[5]&0x40 != 0
|
||||
}
|
||||
return
|
||||
}
|
||||
Reference in New Issue
Block a user