C#下基于vlc的视频播放功能开发

由于项目需要，要回放一些视频资料，经过多方调研，最后决定使用vlc方案。好处优点请大家自行百度谷歌，这里就不废话了。

开发环境：

工具： VS2010 .net4.0

程序类型：WindowsForm 

语言：C#

实现功能：读取视频文件、为后续开发做铺垫。

vlc网上资料很多，但能用过编译的少之又少，经过一天的尝试终于整理成可以运行的vlcSDK。先上图，有图有真相。

.如上图，右侧两图为使用vlc开发的视频播放效果。由于该项目不变透露过多信息。所以针对vlc特意编写一个播放器软件供大家学习研讨，也是通过研究后才正式写的项目程序。稍后会把视软件上传CSDN。

视频播放软件包括工具栏和播放窗口，工具栏包括按钮和表示视频播放时间的进度条。播放器如下图所示：

主要做如下介绍：

CLV2.2 SDK
包括内容：
1、libvlc.dll  
2、libvlc.dll
3、plugins文件夹
4、VlcPlayer.cs

前三个为clvSDK文件，VlcPlayer.cs为C#编写的调用SDK的类和函数

using System;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Security;
using System.Collections.Generic;
using System.Text;

namespace vlc.net
{
    class VlcPlayer
    {
        private IntPtr libvlc_instance_;
        private IntPtr libvlc_media_player_;

        private double duration_;

        public VlcPlayer(string pluginPath)
        {
            string plugin_arg = "--plugin-path=" + pluginPath;
            string[] arguments = { "-I", "dummy", "--ignore-config", "--no-video-title", plugin_arg };
            libvlc_instance_ = LibVlcAPI.libvlc_new(arguments);

            libvlc_media_player_ = LibVlcAPI.libvlc_media_player_new(libvlc_instance_);
        }

        public void SetRenderWindow(int wndHandle)
        {
            if (libvlc_instance_ != IntPtr.Zero && wndHandle != 0)
            {
                LibVlcAPI.libvlc_media_player_set_hwnd(libvlc_media_player_, wndHandle);
            }
        }

        public void PlayFile(string filePath)
        {
            IntPtr libvlc_media = LibVlcAPI.libvlc_media_new_path(libvlc_instance_, filePath);
            if (libvlc_media != IntPtr.Zero)
            {
                LibVlcAPI.libvlc_media_parse(libvlc_media);
                //   duration_ = LibVlcAPI.libvlc_media_get_duration(libvlc_media) / 1000.0;
                LibVlcAPI.libvlc_media_player_set_media(libvlc_media_player_, libvlc_media);
                LibVlcAPI.libvlc_media_release(libvlc_media);
                LibVlcAPI.libvlc_media_player_play(libvlc_media_player_);

                duration_ = LibVlcAPI.libvlc_media_get_duration(libvlc_media) / 1000.0;

                if (duration_ == 0)
                {
                    duration_ = 597;
                }

            }
        }
        public void Play()
        {
            LibVlcAPI.libvlc_media_player_play(libvlc_media_player_);
        }

        public void Pause()
        {
            if (libvlc_media_player_ != IntPtr.Zero)
            {
                LibVlcAPI.libvlc_media_player_pause(libvlc_media_player_);
            }
        }

        public void Stop()
        {
            if (libvlc_media_player_ != IntPtr.Zero)
            {
                LibVlcAPI.libvlc_media_player_stop(libvlc_media_player_);
            }
        }

        public double GetPlayTime()
        {
            return LibVlcAPI.libvlc_media_player_get_time(libvlc_media_player_) / 1000.0;
        }

        public void SetPlayTime(double seekTime)
        {
            LibVlcAPI.libvlc_media_player_set_time(libvlc_media_player_, (Int64)(seekTime * 1000));
        }

        public int GetVolume()
        {
            return LibVlcAPI.libvlc_audio_get_volume(libvlc_media_player_);
        }

        public void SetVolume(int volume)
        {
            LibVlcAPI.libvlc_audio_set_volume(libvlc_media_player_, volume);
        }

        public void SetFullScreen(bool istrue)
        {
            LibVlcAPI.libvlc_set_fullscreen(libvlc_media_player_, istrue ? 1 : 0);
        }

        public double Duration()
        {
            return duration_;
        }

        public string Version()
        {
            return LibVlcAPI.libvlc_get_version();
        }
    }

    internal static class LibVlcAPI
    {
        internal struct PointerToArrayOfPointerHelper
        {
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 11)]
            public IntPtr[] pointers;
        }

        public static IntPtr libvlc_new(string[] arguments)
        {
            PointerToArrayOfPointerHelper argv = new PointerToArrayOfPointerHelper();
            argv.pointers = new IntPtr[11];

            for (int i = 0; i < arguments.Length; i++)
            {
                argv.pointers[i] = Marshal.StringToHGlobalAnsi(arguments[i]);
            }

            IntPtr argvPtr = IntPtr.Zero;
            try
            {
                int size = Marshal.SizeOf(typeof(PointerToArrayOfPointerHelper));
                argvPtr = Marshal.AllocHGlobal(size);
                Marshal.StructureToPtr(argv, argvPtr, false);

                return libvlc_new(arguments.Length, argvPtr);
            }
            finally
            {
                for (int i = 0; i < arguments.Length + 1; i++)
                {
                    if (argv.pointers[i] != IntPtr.Zero)
                    {
                        Marshal.FreeHGlobal(argv.pointers[i]);
                    }
                }
                if (argvPtr != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(argvPtr);
                }
            }
        }

        public static IntPtr libvlc_media_new_path(IntPtr libvlc_instance, string path)
        {
            IntPtr pMrl = IntPtr.Zero;
            try
            {
                byte[] bytes = Encoding.UTF8.GetBytes(path);
                pMrl = Marshal.AllocHGlobal(bytes.Length + 1);
                Marshal.Copy(bytes, 0, pMrl, bytes.Length);
                Marshal.WriteByte(pMrl, bytes.Length, 0);
                return libvlc_media_new_path(libvlc_instance, pMrl);
            }
            finally
            {
                if (pMrl != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(pMrl);
                }
            }
        }

        public static IntPtr libvlc_media_new_location(IntPtr libvlc_instance, string path)
        {
            IntPtr pMrl = IntPtr.Zero;
            try
            {
                byte[] bytes = Encoding.UTF8.GetBytes(path);
                pMrl = Marshal.AllocHGlobal(bytes.Length + 1);
                Marshal.Copy(bytes, 0, pMrl, bytes.Length);
                Marshal.WriteByte(pMrl, bytes.Length, 0);
                return libvlc_media_new_path(libvlc_instance, pMrl);
            }
            finally
            {
                if (pMrl != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(pMrl);
                }
            }
        }

        // ----------------------------------------------------------------------------------------
        // 以下是libvlc.dll导出函数
        //       [DllImport("xx.dll", EntryPoint=“xxFunction”, CallingConvention = CallingConvention.Cdecl)]
        // 创建一个libvlc实例，它是引用计数的
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_new", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        private static extern IntPtr libvlc_new(int argc, IntPtr argv);

        // 释放libvlc实例
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_release", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_release(IntPtr libvlc_instance);

        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_get_version", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern String libvlc_get_version();

        // 从视频来源(例如Url)构建一个libvlc_meida
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_new_location", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        private static extern IntPtr libvlc_media_new_location(IntPtr libvlc_instance, IntPtr path);

        // 从本地文件路径构建一个libvlc_media
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_new_path", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        private static extern IntPtr libvlc_media_new_path(IntPtr libvlc_instance, IntPtr path);

        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_release", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_media_release(IntPtr libvlc_media_inst);

        // 创建libvlc_media_player(播放核心)
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_player_new", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern IntPtr libvlc_media_player_new(IntPtr libvlc_instance);

        // 将视频(libvlc_media)绑定到播放器上
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_player_set_media", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_media_player_set_media(IntPtr libvlc_media_player, IntPtr libvlc_media);

        // 设置图像输出的窗口
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_player_set_hwnd", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_media_player_set_hwnd(IntPtr libvlc_mediaplayer, Int64 drawable);

        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_player_play", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_media_player_play(IntPtr libvlc_mediaplayer);

        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_player_pause", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_media_player_pause(IntPtr libvlc_mediaplayer);

        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_player_stop", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_media_player_stop(IntPtr libvlc_mediaplayer);

        // 解析视频资源的媒体信息(如时长等)
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_parse", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_media_parse(IntPtr libvlc_media);

        // 返回视频的时长(必须先调用libvlc_media_parse之后，该函数才会生效)
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_get_duration", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern Int64 libvlc_media_get_duration(IntPtr libvlc_media);

        // 当前播放的时间
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_player_get_time", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern Int64 libvlc_media_player_get_time(IntPtr libvlc_mediaplayer);

        // 设置播放位置(拖动)
        //       [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_player_set_time", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_media_player_set_time(IntPtr libvlc_mediaplayer, Int64 time);

        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_media_player_release", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_media_player_release(IntPtr libvlc_mediaplayer);

        // 获取和设置音量
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_audio_get_volume", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern int libvlc_audio_get_volume(IntPtr libvlc_media_player);

        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_audio_set_volume", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_audio_set_volume(IntPtr libvlc_media_player, int volume);

        // 设置全屏
        //        [DllImport("libvlc", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
        [DllImport("libvlc.dll", EntryPoint = "libvlc_set_fullscreen", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [SuppressUnmanagedCodeSecurity]
        public static extern void libvlc_set_fullscreen(IntPtr libvlc_media_player, int isFullScreen);
    }
}

 

代码不做过多介绍，已经将源码上传MSDN，

链接：

播放器源码（包括SDK）：https://download.csdn.net/download/w267309080/11967649

SDK：https://download.csdn.net/download/w267309080/11967641