From 965641be1649f16882ca4757243aa43d7b6f698d Mon Sep 17 00:00:00 2001
From: saxon <saxon.milton@gmail.com>
Date: Sat, 14 Jul 2018 14:49:21 +0930
Subject: [PATCH] Got rid of C.memcpy

---
 rtmp/rtmp.go | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/rtmp/rtmp.go b/rtmp/rtmp.go
index 77042fa4..0b06139b 100644
--- a/rtmp/rtmp.go
+++ b/rtmp/rtmp.go
@@ -49,6 +49,7 @@ import (
 	"unsafe"
 	_"fmt"
 	"math"
+	"reflect"
 )
 
 const (
@@ -130,7 +131,7 @@ func (s *session) Write(data []byte) (int, error) {
 }
 
 func rtmpWrite(r *C.RTMP, data []byte) int {
-	buf := unsafe.Pointer(&data[0])
+	buf := sliceToPtr(data)
 	var pkt = &r.m_write
 	var pend, enc unsafe.Pointer
 	size := len(data)
@@ -198,9 +199,7 @@ func rtmpWrite(r *C.RTMP, data []byte) int {
 		if num > s2 {
 			num = s2
 		}
-		// TODO: Can only remove this mem copy onc I port the RTMPPacket struct and
-		// AllocatPacket
-		C.memcpy(enc,buf,C.ulong(num))
+		copy(ptrToSlice(enc,num),ptrToSlice(buf,num))
 		pkt.m_nBytesRead += C.uint(num)
 		s2 -= num
 		buf = incPtr(buf,num)
@@ -221,12 +220,23 @@ func rtmpWrite(r *C.RTMP, data []byte) int {
 	return size + s2
 }
 
+func sliceToPtr(data []byte) unsafe.Pointer {
+	return unsafe.Pointer(&data[0])
+}
+
+func ptrToSlice(data unsafe.Pointer, size int) []byte {
+	var ret []byte
+	shDest := (*reflect.SliceHeader)(unsafe.Pointer(&ret))
+	shDest.Data = uintptr(data)
+	shDest.Len = size
+	shDest.Cap = size
+	return ret
+}
 
 func incPtr(ptr unsafe.Pointer, inc int) unsafe.Pointer {
 	return unsafe.Pointer(uintptr(ptr) + uintptr(inc))
 }
 
-
 /*
 func sendPacket(r *C.RTMP, pkt *C.RTMPPacket, queue int) int {
 	const prevPacket *C.RTMPPacket