mirror of https://bitbucket.org/ausocean/av.git
psi: starting to remove psi stuff from encoder.go and put into psi package
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parent
9e7b65ac6a
commit
43abed9522
stream/mts
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@ -36,6 +36,12 @@ import (
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"time"
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"bitbucket.org/ausocean/av/stream/mts/pes"
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"bitbucket.org/ausocean/av/stream/mts/psi"
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)
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var (
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patTable []byte
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pmtTable []byte
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)
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const (
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@ -43,66 +49,13 @@ const (
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psiSendCount = 100
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)
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// TODO: Finish off mts/psi so that we can create pat and pmt tables instead
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// of hardcoding.
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var (
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patTable = []byte{
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0x00, // pointer
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// ---- section included in data sent to CRC32 during check
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// table header
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0x00, // table id
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0xb0, // section syntax indicator:1|private bit:1|reserved:2|section length:2|more bytes...:2
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0x0d, // more bytes...
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// syntax section
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0x00, 0x01, // table id extension
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0xc1, // reserved bits:3|version:5|use now:1
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0x00, // section number
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0x00, // last section number
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// table data
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0x00, 0x01, // Program number
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0xf0, 0x00, // reserved:3|program map PID:13
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// 0x2a, 0xb1, 0x04, 0xb2, // CRC
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// ----
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}
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pmtTable = []byte{
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0x00, // pointer
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// ---- section included in data sent to CRC32 during check
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// table header
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0x02, // table id
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0xb0, // section syntax indicator:1|private bit:1|reserved:2|section length:2|more bytes...:2
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0x12, // more bytes...
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// syntax section
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0x00, 0x01, // table id extension
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0xc1, // reserved bits:3|version:5|use now:1
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0x00, // section number
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0x00, // last section number
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// table data
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0xe1, 0x00, // reserved:3|PCR PID:13
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0xf0, 0x00, // reserved:4|unused:2|program info length:10
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// No program descriptors since program info length is 0.
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// elementary stream info data
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0x1b, // stream type
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0xe1, 0x00, // reserved:3|elementary PID:13
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0xf0, 0x00, // reserved:4|unused:2|ES info length:10
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// No elementary stream descriptors since ES info length is 0.
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// 0x15, 0xbd, 0x4d, 0x56, // CRC
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// ----
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}
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)
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func init() {
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// Generate IEEE polynomial table
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// for the big-endian algorithm.
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crcTable := crc32_MakeTable(bits.Reverse32(crc32.IEEE))
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patTable = completePSI(patTable, crcTable)
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pmtTable = completePSI(pmtTable, crcTable)
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patTable = completePSI(psi.StdPat, crcTable)
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pmtTable = completePSI(psi.StdPmt, crcTable)
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}
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func completePSI(psi []byte, tab *crc32.Table) []byte {
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