Golang calls sdl2, plays PCM audio, and reports an error signal arrived during external code execution.

golang call sdl2, Play pcm Audio , Report errors signal arrived during external code execution.

win10 x64 The next test was successful , Success is not guaranteed under other operating systems .

It's using syscall The way , No cgo The way .

See address
stay go1.16.15 Compile and execute , The following error will be reported . Switch to go1.18 I won't make a mistake .

Exception 0xc0000005 0x0 0xc000442000 0x7ff96da8db50
PC=0x7ff96da8db50
signal arrived during external code execution

syscall.Syscall6(0x7ff96daa7440, 0x4, 0x20d6354a0a0, 0xc000442000, 0x1000, 0x10, 0x0, 0x0, 0x0, 0x0, …)
D:/Program Files/Go/go1.16.15/src/runtime/syscall_windows.go:347 +0xf2
syscall.(*Proc).Call(0xc000599b40, 0xc0001207c0, 0x4, 0x4, 0x20, 0xa6ffa0, 0x20d6354a001, 0xc0001207c0)
D:/Program Files/Go/go1.16.15/src/syscall/dll_windows.go:188 +0x385
syscall.(*LazyProc).Call(0xc00007fc50, 0xc0001207c0, 0x4, 0x4, 0x3, 0x3, 0x20d6354a0a0, 0x0)
D:/Program Files/Go/go1.16.15/src/syscall/dll_windows.go:339 +0x78
github.com/moonfdd/sdl2-go/sdl.SDL_MixAudio(0x20d6354a0a0, 0xc000442000, 0x1000001000)
D:/mysetup/gopath/src/sdl2-go/sdl/SDL_audio.go:1185 +0xf1
main.fill_audio_pcm(0xc00010ff48, 0x20d6354a0a0, 0x1000, 0x0)
D:/mysetup/gopath/src/sdl2-go/examples/a06-sdl-pcm/main1.go:33 +0x125

goroutine 1 [chan receive]:
main.main()
D:/mysetup/gopath/src/sdl2-go/examples/a06-sdl-pcm/main1.go:66 +0x288
rax 0x20d6354a0a0
rbx 0xc0000086e0
rcx 0x20d6354a0a0
rdi 0xecaa4c3000
rsi 0xc0000439c0
rbp 0xc000043960
rsp 0xecabbffb50
r8 0x8010
r9 0x20d6354b0a0
r10 0x10
r11 0x4
r12 0xa7b800
r13 0x0
r14 0x0
r15 0x2030001
rip 0x7ff96da8db50
rflags 0x10206
cs 0x33
fs 0x53
gs 0x2b

golang The code is as follows ：

package main

import (
	"fmt"
	"github.com/moonfdd/sdl2-go/sdl"
	"github.com/moonfdd/sdl2-go/sdlcommon"
	"io/ioutil"
	"sync"
	"syscall"
	"unsafe"
)

var o sync.Once

// Audio device callback function 
func fill_audio_pcm(udata sdlcommon.FVoidP, stream *sdlcommon.FUint8T, len1 sdlcommon.FInt) uintptr {
    
	info := (*Info)(unsafe.Pointer(udata))
	if info.isStop {
    
		return 0
	}
	if info.Start >= info.Len {
    
		info.isStop = true
		o.Do(func() {
    
			ch <- struct{
    }{
    }
		})
		return 0
	}
	sdl.SDL_memset(uintptr(unsafe.Pointer(stream)), 0, uint64(len1))
	if len1 > int32(info.Len-info.Start) {
    
		fmt.Println(" Insufficient len", len1, info.Len-info.Start)
		len1 = int32(info.Len - info.Start)
	}
	sdl.SDL_MixAudio(stream, &info.Data[info.Start], uint32(len1), sdl.SDL_MIX_MAXVOLUME/8)
	info.Start += int(len1)
	return 0
}

var ch = make(chan struct{
    }, 1)

func main() {
    
	sdlcommon.SetSDL2Path("SDL2.dll")
	var spec sdl.SDL_AudioSpec
	sdl.SDL_Init(sdl.SDL_INIT_AUDIO)
	spec.Freq = 44100
	spec.Format = sdl.AUDIO_S16SYS //  Sample point format 
	spec.Channels = 2              // 2 passageway 
	spec.Silence = 0
	spec.Userdata = uintptr(0)
	spec.Samples = 1024                                 // 23.2ms -> 46.4ms  Number of samples per read , How often a callback and  samples
	spec.Callback = syscall.NewCallback(fill_audio_pcm) //  Callback function 

	fileData, err := ioutil.ReadFile("44100_16bit_2ch.pcm")
	if err != nil {
    
		fmt.Println(" Failed to read file ", err)
		return
	}
	info := new(Info)
	info.Data = fileData
	info.Len = len(fileData)
	spec.Userdata = uintptr(unsafe.Pointer(info))
	if sdl.SDL_OpenAudio(&spec, nil) != 0 {
    
		fmt.Println(" Failed to open audio device ")
		return
	}
	sdl.SDL_PauseAudio(0)
	<-ch
	fmt.Println(" close ")
	sdl.SDL_CloseAudio()
	sdl.SDL_Quit()
}

type Info struct {
    
	Data   []byte
	Len    int
	Start  int
	isStop bool
}

The results are as follows ：