C# VS2022 用APlayerCaller.dll调用无法播放|APlayer 讨论区 - APlayer 开发者论坛

离线hanlinhe110

新手

只看楼主倒序阅读使用道具楼主发表于: 2023-04-10

由于2022不支持com 所以采用dll调用的方式，根据以下代码可以运行，
可以获得一个句柄，依据句柄打开文件也提示true。但是不现实也不播放任何东西。
VS2022 x86环境可以运行。

复制代码

using Microsoft.VisualBasic.Logging;
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
namespace MainAplayer
{
public partial class Form1 : Form
{
public delegate void fun0();//声明委托
public delegate void fun1(long l1);//声明委托
public delegate void fun2(long l1, long l2);//声明委托
public delegate void fun3(long l1, long l2, long l3);//声明委托
public delegate void funstr(string l1);//声明委托
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
[DllImportAttribute("APlayerCaller.dll", EntryPoint = "APlayer_Create", SetLastError = true)]
public static extern int APlayer_Create
(
long hParent,
long x,
long y,
long nWidth,
long nHeight,
long OnMessage,
long OnStateChanged,
long OnOpenSuccess,
long OnSeekCompleted,
long OnBuffer,
long OnVideoSizeChanged,
long ondownloadcodec,
long OnEvent
);
[DllImportAttribute("APlayerCaller.dll", EntryPoint = "APlayer_OpenW", CharSet =CharSet.Unicode, SetLastError =true)]
public static extern bool APlayer_OpenW(long hand, string url);
[DllImportAttribute("APlayerCaller.dll", EntryPoint = "APlayer_Play", SetLastError = true)]
public static extern bool APlayer_Play(long hand);
[DllImportAttribute("APlayerCaller.dll", EntryPoint = "APlayer_SetCustomLogo", SetLastError = true)]
public static extern bool APlayer_SetCustomLogo(long hand,long logo);
private void button1_Click(object sender, EventArgs e)
{
fun3 DOnMessage = new fun3(OnMessage);
IntPtr POnMessage = Marshal.GetFunctionPointerForDelegate(DOnMessage);
fun2 DOnStateChanged = new fun2(OnStateChanged);
IntPtr POnStateChanged = Marshal.GetFunctionPointerForDelegate(DOnStateChanged);
fun0 DOnOpenSuccess = new fun0(OnOpenSucceeded);
IntPtr POnOpenSuccess = Marshal.GetFunctionPointerForDelegate(DOnOpenSuccess);
fun1 DOnSeekCompleted = new fun1(OnSeekCompleted);
IntPtr POnSeekCompleted = Marshal.GetFunctionPointerForDelegate(DOnSeekCompleted);
fun1 DOnBuffer = new fun1(OnBuffer);
IntPtr POnBuffer = Marshal.GetFunctionPointerForDelegate(DOnBuffer);
fun0 DOnVideoSizeChanged = new fun0(OnVideoSizeChanged);
IntPtr POnVideoSizeChanged = Marshal.GetFunctionPointerForDelegate(DOnVideoSizeChanged);
funstr DOnDownloadCodec = new funstr(OnDownloadCodec);
IntPtr POnDownloadCodec = Marshal.GetFunctionPointerForDelegate(DOnDownloadCodec);
fun2 DOnEvent = new fun2(OnEvent);
IntPtr POnEvent = Marshal.GetFunctionPointerForDelegate(DOnEvent);
//创建代码
long HAplayer = APlayer_Create(panel1.Handle.ToInt32(), 0, 0, 200, 200, (long)POnMessage, (long)POnStateChanged, (long)POnOpenSuccess, (long)POnSeekCompleted, (long)POnBuffer, (long)POnVideoSizeChanged, (long)POnDownloadCodec, (long)POnEvent);
MessageBox.Show("句柄是:" + HAplayer.ToString());
//APlayer_SetCustomLogo(HAplayer, -1);
bool isOpen = APlayer_OpenW(HAplayer, "D:\\A\\1.mp4");
MessageBox.Show("isOpen:" + isOpen);
// APlayer_Play(HAplayer);
}
void OnMessage(long l1, long l2, long l3)
{
//方法体
Debug.WriteLine(l1 + "=OnMessage=" + l2);
}
void OnStateChanged(long l1, long l2)
{
Debug.WriteLine(l1 + "=OnStateChanged=" + l2);
}
void OnOpenSucceeded()
{
Debug.WriteLine("=OnOpenSucceeded=");
}
void OnSeekCompleted(long l1)
{
Debug.WriteLine(l1 + "=OnSeekCompleted=");
}
void OnBuffer(long l1)
{
Debug.WriteLine(l1 + "=OnBuffer=");
}
void OnVideoSizeChanged()
{
Debug.WriteLine( "=OnVideoSizeChanged=" );
}
void OnEvent(long nEventCode, long nEventParam)
{
Debug.WriteLine(nEventCode + "=OnEvent=" + nEventParam);
}
void OnDownloadCodec(string l1)
{
Debug.WriteLine(l1 + "==OnDownloadCodec");
}
}
}

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离线aplayer

管理员

只看该作者沙发发表于: 2023-04-12

如果是这样说明缺少解码器，你把完整 Codecs 下载下来放在 APlayer.dll 所在目录试试。

离线hanlinhe110

新手

只看该作者板凳发表于: 2023-05-16

目前问题已解决，与编码无关，与C#代码有关系，有些用法不太会用导致无法播放。目前环境VS2022 直接调用DLL就可以进行播放，有需要的可以加我Q1580007242.

离线qq270081366

新手

只看该作者地板发表于: 2023-06-14

可以64位编译吗？

离线zjf1998

新手

只看该作者 4楼发表于: 2023-08-02

回 hanlinhe110 的帖子

hanlinhe110:目前问题已解决，与编码无关，与C#代码有关系，有些用法不太会用导致无法播放。目前环境VS2022 直接调用DLL就可以进行播放，有需要的可以加我Q1580007242.
[图片][attachment=34 .. (2023-05-16 15:38)

我请教了楼主，对比了代码，发现是回调的声明不正确导致的问题，代码修正如下：

//   public delegate void fun0();//声明委托
      //  public delegate void fun1(long l1);//声明委托
      //  public delegate void fun2(long l1, long l2);//声明委托
      //  public delegate void fun3(long l1, long l2, long l3);//声明委托
      //  public delegate void funstr(string l1);//声明委托

        public delegate void fun0();//声明委托
        public delegate void fun1(int l1);//声明委托
        public delegate void fun2(int l1, int l2);//声明委托
        public delegate void fun3(int l1, int l2, int l3);//声明委托
        public delegate void funstr(string l1);//声明委托

        void OnMessage(int l1, int l2, int l3)
        {
            //方法体
            //Debug.WriteLine(l1 + "=OnMessage=" + l2);
        }
        void OnStateChanged(int l1, int l2)
        {
            Debug.WriteLine(l1 + "=OnStateChanged=" + l2);
            if (l2 == 6)
            {
                PlayButton.Text = "播放";
            }
        }
        void OnOpenSucceeded()
        {
            Debug.WriteLine("=OnOpenSucceeded=");
        }
        void OnSeekCompleted(int l1)
        {
            Debug.WriteLine(l1 + "=OnSeekCompleted=");
        }
        void OnBuffer(int l1)
        {
            Debug.WriteLine(l1 + "=OnBuffer=");
        }
        void OnVideoSizeChanged()
        {
            Debug.WriteLine("=OnVideoSizeChanged=");
        }
        void OnEvent(int nEventCode, int nEventParam)
        {
            //Debug.WriteLine(nEventCode + "=OnEvent=" + nEventParam);
        }
        void OnDownloadCodec(string l1)
        {
            Debug.WriteLine(l1 + "==OnDownloadCodec");

        }