From 7262642b4b1440a6885cdf10b01077c81faedf47 Mon Sep 17 00:00:00 2001
From: Arkadi Shishlov <arkadi.shishlov@gmail.com>
Date: Wed, 7 Feb 2024 18:01:12 +0200
Subject: [PATCH] Wrap C type to allow for external WebRtcVadInst type
 reference

To use VAD instance in some contexts, for example: a struct field, `sync.Pool`, etc. it's necessary to reference the type explicitly.
https://github.com/golang/go/issues/13467

Signed-off-by: Arkadi Shishlov <arkadi.shishlov@gmail.com>
---
 vad.go | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/vad.go b/vad.go
index f060bcf..f0c594d 100644
--- a/vad.go
+++ b/vad.go
@@ -12,19 +12,23 @@ import (
 	"unsafe"
 )
 
+type VadInst struct {
+	inst *C.struct_WebRtcVadInst
+}
+
 // Create Creates an instance to the VAD structure.
-func Create() *C.struct_WebRtcVadInst {
-	return C.WebRtcVad_Create()
+func Create() VadInst {
+	return VadInst{C.WebRtcVad_Create()}
 }
 
 // Free Frees the dynamic memory of a specified VAD instance.
-func Free(vadInst *C.struct_WebRtcVadInst) {
-	C.WebRtcVad_Free(vadInst)
+func Free(vadInst VadInst) {
+	C.WebRtcVad_Free(vadInst.inst)
 }
 
 // Init Initializes a VAD instance.
-func Init(vadInst *C.struct_WebRtcVadInst) (err error) {
-	result := C.WebRtcVad_Init(vadInst)
+func Init(vadInst VadInst) (err error) {
+	result := C.WebRtcVad_Init(vadInst.inst)
 	if result == -1 {
 		err = errors.New("null pointer or Default mode could not be set")
 	}
@@ -32,8 +36,8 @@ func Init(vadInst *C.struct_WebRtcVadInst) (err error) {
 }
 
 // SetMode Sets the VAD operating mode.
-func SetMode(vadInst *C.struct_WebRtcVadInst, mode int) (err error) {
-	result := C.WebRtcVad_set_mode(vadInst, C.int(mode))
+func SetMode(vadInst VadInst, mode int) (err error) {
+	result := C.WebRtcVad_set_mode(vadInst.inst, C.int(mode))
 	if result == -1 {
 		err = errors.New("mode could not be set or the VAD instance has not been initialized")
 	}
@@ -41,8 +45,8 @@ func SetMode(vadInst *C.struct_WebRtcVadInst, mode int) (err error) {
 }
 
 // Process Sets the VAD operating mode.
-func Process(vadInst *C.struct_WebRtcVadInst, fs int, audioFrame []byte, frameLength int) (active bool, err error) {
-	result := C.WebRtcVad_Process(vadInst, C.int(fs), (*C.short)(unsafe.Pointer(&audioFrame[0])), C.size_t(frameLength))
+func Process(vadInst VadInst, fs int, audioFrame []byte, frameLength int) (active bool, err error) {
+	result := C.WebRtcVad_Process(vadInst.inst, C.int(fs), (*C.short)(unsafe.Pointer(&audioFrame[0])), C.size_t(frameLength))
 	if result == 1 {
 		active = true
 	} else if result == 0 {