GB28181: Support GB28181-2016 protocol. v5.0.74 (#3201)

01. Support GB config as StreamCaster.
02. Support disable GB by --gb28181=off.
03. Add utests for SIP examples.
04. Wireshark plugin to decode TCP/9000 as rtp.rfc4571
05. Support MPEGPS program stream codec.
06. Add utest for PS stream codec.
07. Decode MPEGPS packet stream.
08. Carry RTP and PS packet as helper in PS message.
09. Support recover from error mode.
10. Support process by a pack of PS/TS messages.
11. Add statistic for recovered and msgs dropped.
12. Recover from err position fastly.
13. Define state machine for GB session.
14. Bind context to GB session.
15. Re-invite when media disconnected.
16. Update GitHub actions with GB28181.
17. Support parse CANDIDATE by env or pip.
18. Support mux GB28181 to RTMP.
19. Support regression test by srs-bench.

trunk/3rdparty/srs-bench/vendor/github.com/tevino/abool/.gitignore

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+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof

trunk/3rdparty/srs-bench/vendor/github.com/tevino/abool/LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2016 Tevin Zhang
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

trunk/3rdparty/srs-bench/vendor/github.com/tevino/abool/README.md

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+# ABool :bulb:
+[![Go Report Card](https://goreportcard.com/badge/github.com/tevino/abool)](https://goreportcard.com/report/github.com/tevino/abool)
+[![GoDoc](https://godoc.org/github.com/tevino/abool?status.svg)](https://godoc.org/github.com/tevino/abool)
+
+Atomic Boolean library for Go, optimized for performance yet simple to use.
+
+Use this for cleaner code.
+
+## Usage
+
+```go
+import "github.com/tevino/abool"
+
+cond := abool.New()  // default to false
+
+cond.Set()                 // Set to true
+cond.IsSet()               // Returns true
+cond.UnSet()               // Set to false
+cond.SetTo(true)           // Set to whatever you want
+cond.SetToIf(false, true)  // Set to true if it is false, returns false(not set)
+
+
+// embedding
+type Foo struct {
+    cond *abool.AtomicBool  // always use pointer to avoid copy
+}
+```
+
+## Benchmark:
+
+- Go 1.6.2
+- OS X 10.11.4
+
+```shell
+# Read
+BenchmarkMutexRead-4       	100000000	        21.0 ns/op
+BenchmarkAtomicValueRead-4 	200000000	         6.30 ns/op
+BenchmarkAtomicBoolRead-4  	300000000	         4.21 ns/op  # <--- This package
+
+# Write
+BenchmarkMutexWrite-4      	100000000	        21.6 ns/op
+BenchmarkAtomicValueWrite-4	 30000000	        43.4 ns/op
+BenchmarkAtomicBoolWrite-4 	200000000	         9.87 ns/op  # <--- This package
+
+# CAS
+BenchmarkMutexCAS-4        	 30000000	        44.9 ns/op
+BenchmarkAtomicBoolCAS-4   	100000000	        11.7 ns/op   # <--- This package
+```
+

trunk/3rdparty/srs-bench/vendor/github.com/tevino/abool/bool.go

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+// Package abool provides atomic Boolean type for cleaner code and
+// better performance.
+package abool
+
+import "sync/atomic"
+
+// New creates an AtomicBool with default to false
+func New() *AtomicBool {
+	return new(AtomicBool)
+}
+
+// NewBool creates an AtomicBool with given default value
+func NewBool(ok bool) *AtomicBool {
+	ab := New()
+	if ok {
+		ab.Set()
+	}
+	return ab
+}
+
+// AtomicBool is an atomic Boolean
+// Its methods are all atomic, thus safe to be called by
+// multiple goroutines simultaneously
+// Note: When embedding into a struct, one should always use
+// *AtomicBool to avoid copy
+type AtomicBool int32
+
+// Set sets the Boolean to true
+func (ab *AtomicBool) Set() {
+	atomic.StoreInt32((*int32)(ab), 1)
+}
+
+// UnSet sets the Boolean to false
+func (ab *AtomicBool) UnSet() {
+	atomic.StoreInt32((*int32)(ab), 0)
+}
+
+// IsSet returns whether the Boolean is true
+func (ab *AtomicBool) IsSet() bool {
+	return atomic.LoadInt32((*int32)(ab)) == 1
+}
+
+// SetTo sets the boolean with given Boolean
+func (ab *AtomicBool) SetTo(yes bool) {
+	if yes {
+		atomic.StoreInt32((*int32)(ab), 1)
+	} else {
+		atomic.StoreInt32((*int32)(ab), 0)
+	}
+}
+
+// SetToIf sets the Boolean to new only if the Boolean matches the old
+// Returns whether the set was done
+func (ab *AtomicBool) SetToIf(old, new bool) (set bool) {
+	var o, n int32
+	if old {
+		o = 1
+	}
+	if new {
+		n = 1
+	}
+	return atomic.CompareAndSwapInt32((*int32)(ab), o, n)
+}