From fbaafa0f8d18fac1a267dd67d0f9e1a8bba4729e Mon Sep 17 00:00:00 2001
From: saxon <saxon.milton@gmail.com>
Date: Sat, 11 Aug 2018 02:00:11 +0930
Subject: [PATCH] Ported RTMP_ParsePlaypath to C_RTMP_ParsPlaypath - still need
 to test

---
 rtmp/rtmp.go | 107 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)

diff --git a/rtmp/rtmp.go b/rtmp/rtmp.go
index 81a27e9e..08415aab 100644
--- a/rtmp/rtmp.go
+++ b/rtmp/rtmp.go
@@ -771,6 +771,7 @@ func C_RTMP_ParseURL(url *byte, protocol *int32, host *C.AVal, port *uint32,
 	if *p == '/' {
 		p = (*byte)(incBytePtr(unsafe.Pointer(p), 1))
 	}
+	// NOTE: don't think we currently need this section - see 787 for this func
 
 	if int(uintptr(unsafe.Pointer(end))-uintptr(unsafe.Pointer(p))) != 0 {
 		var av C.AVal
@@ -783,6 +784,112 @@ func C_RTMP_ParseURL(url *byte, protocol *int32, host *C.AVal, port *uint32,
 	return 1
 }
 
+// void RTMP_ParsePlaypath(AVal *in, AVal *out);
+// parseurl.c +201
+func C_RTMP_ParsePlaypath(in, out *C.AVal) {
+	var addMP4 int32 = 0
+	var addMP3 int32 = 0
+	var subExt int32 = 0
+	playpath := in.av_val
+	var temp, q *byte
+	var ext *byte = nil
+	ppstart := (*byte)(unsafe.Pointer(playpath))
+	var streamname, destptr, p *byte
+
+	pplen := int32(in.av_len)
+
+	out.av_val = nil
+	out.av_len = 0
+
+	temp = strstr((*byte)(unsafe.Pointer(ppstart)), goStrToCStr("slist="))
+	if *ppstart == '?' && temp != nil {
+		ppstart = (*byte)(incBytePtr(unsafe.Pointer(temp), 6))
+		pplen = int32(strlen(ppstart))
+
+		temp = strchr(ppstart, '&')
+
+		if temp != nil {
+			pplen = int32(uintptr(unsafe.Pointer(temp)) - uintptr(unsafe.Pointer(ppstart)))
+		}
+	}
+
+	q = strchr(ppstart, '?')
+
+	if pplen >= 4 {
+		if q != nil {
+			ext = (*byte)(decBytePtr(unsafe.Pointer(q), 4))
+		} else {
+			ext = (*byte)(indxBytePtr(unsafe.Pointer(ppstart), int(uintptr(pplen)-
+				uintptr(4))))
+		}
+		switch {
+		case strings.Compare(cStrToGoStr(ext)[:4], ".f4v") == 0 ||
+			strings.Compare(cStrToGoStr(ext)[:4], ".mp4") == 0:
+			addMP4 = 1
+			subExt = 1
+		case ppstart == (*byte)(unsafe.Pointer(playpath)) && strings.Compare(
+			cStrToGoStr(ext)[:4], ".flv") == 0:
+			subExt = 1
+		case strings.Compare(cStrToGoStr(ext)[:4], ".mp3") == 0:
+			addMP3 = 1
+			subExt = 1
+		}
+	}
+
+	streamname = (*byte)(C.malloc(C.size_t(pplen + 4 + 1)))
+
+	if streamname == nil {
+		return
+	}
+
+	destptr = streamname
+	switch {
+	case addMP4 != 0:
+		if strings.Compare(cStrToGoStr(ppstart)[:4], "mp4") != 0 {
+			memmove(unsafe.Pointer(destptr), unsafe.Pointer(goStrToCStr("mp4:")),
+				uintptr(len("mp4:")))
+			destptr = (*byte)(incBytePtr(unsafe.Pointer(destptr), 4))
+		} else {
+			subExt = 0
+		}
+	case addMP3 != 0:
+		if strings.Compare(cStrToGoStr(ppstart)[:4], "mp3") != 0 {
+			memmove(unsafe.Pointer(destptr), unsafe.Pointer(goStrToCStr("mp3:")),
+				uintptr(len("mp4:")))
+			destptr = (*byte)(incBytePtr(unsafe.Pointer(destptr), 4))
+		} else {
+			subExt = 0
+		}
+	}
+
+	p = (*byte)(ppstart)
+	for pplen > 0 {
+		if subExt != 0 && p == ext {
+			p = (*byte)(incBytePtr(unsafe.Pointer(p), 4))
+			pplen -= 4
+			continue
+		}
+		if *p == '%' {
+			var c uint32
+			fmt.Sscanf(cStrToGoStr((*byte)(incBytePtr(unsafe.Pointer(p), 1))), "%02x", &c)
+			*indxBytePtr(unsafe.Pointer(destptr), 0) = byte(c)
+			destptr = (*byte)(incBytePtr(unsafe.Pointer(destptr), 1))
+			pplen -= 3
+			p = (*byte)(incBytePtr(unsafe.Pointer(p), 3))
+		} else {
+			*indxBytePtr(unsafe.Pointer(destptr), 0) = *p
+			destptr = (*byte)(incBytePtr(unsafe.Pointer(destptr), 1))
+			p = (*byte)(incBytePtr(unsafe.Pointer(p), 1))
+			pplen--
+		}
+	}
+	*destptr = '\x00'
+
+	out.av_val = (*C.char)(unsafe.Pointer(streamname))
+	out.av_len = C.int(uintptr(unsafe.Pointer(destptr)) - uintptr(unsafe.Pointer(
+		streamname)))
+}
+
 // void SocksSetup(RTMP *r, C.AVal* sockshost);
 // rtmp.c +410
 func C_SocksSetup(r *C.RTMP, sockshost *C.AVal) {