vlc的应用之三：动态调用vlc-0.9.4的libvlc.dll【转】

 

using System; 
using System.Text; 
using System.Runtime.InteropServices; 
 
namespace MyOwnPlayer 
{ 
        class Media 
        { 
                //mediaHandle字段和属性 
                private MediaHandle mediaHandle; 
                public MediaHandle MediaHandle 
                { 
                        get { return mediaHandle; } 
                } 
 
                //构造方法                
                public Media(CoreHandle coreHandle, String filename, ref ExceptionStruct ex) 
                { 
                        //c#为UTF-16编码, libvlc.dll为UTF-8编码, 需要转换. 
                        UTF8Encoding utf8 = new UTF8Encoding(); 
                        mediaHandle = libvlc_media_new(coreHandle, utf8.GetBytes(filename), ref ex); 
                } 
                 
                //Dll动态导入 
                [DllImport("libvlc")] 
                private static extern MediaHandle libvlc_media_new 
                        (CoreHandle coreHandle, [MarshalAs(UnmanagedType.LPArray)] byte[] link, refExceptionStruct ex); 
                } 
} 

using System; 
using System.Runtime.InteropServices; 
 
namespace MyOwnPlayer 
{ 
        class MediaPlayerHandle : SafeHandle 
        { 
                //构造方法 
                public MediaPlayerHandle() 
                        : base(IntPtr.Zero, true) 
                { 
                } 
 
                //重写的方法 
                public override bool IsInvalid 
                { 
                        get { return handle == IntPtr.Zero; } 
                } 
 
                protected override bool ReleaseHandle() 
                { 
                        if (!IsInvalid) 
                        { 
                                libvlc_media_player_release(this);                                handle = IntPtr.Zero; 
                        } 
                        return true; 
                } 
 
                protected override void Dispose(bool disposing) 
                { 
                        ReleaseHandle(); 
                        base.Dispose(disposing); 
                } 
 
                //Dll动态导入 
                [DllImport("libvlc")] 
                private static extern void libvlc_media_player_release(MediaPlayerHandle mediaPlayerHandle); 
        } 
} 

using System; 
using System.Runtime.InteropServices; 
 
namespace MyOwnPlayer 
{ 
        class MediaPlayer 
        { 
                //mediaPlayerHandle字段和属性 
                private MediaPlayerHandle mediaPlayerHandle; 
                public MediaPlayerHandle MediaPlayerHandle 
                { 
                        get { return mediaPlayerHandle; } 
                } 
 
                //构造方法 
                public MediaPlayer(MediaHandle mediaHandle, ref ExceptionStruct ex) 
                { 
                        mediaPlayerHandle = libvlc_media_player_new_from_media(mediaHandle, ref ex); 
                } 
 
                //设置父窗口 
                public void VedioSetParent(CoreHandle coreHandle, IntPtr hDT, ref ExceptionStruct ex) 
                { 
                        libvlc_video_set_parent(coreHandle, hDT, ref ex); 
                } 
 
                //播放 
                public void Play(ref ExceptionStruct ex) 
                { 
                        libvlc_media_player_play(mediaPlayerHandle, ref ex); 
                } 
 
                //停止 
                public void Stop(ref ExceptionStruct ex) 
                { 
                        libvlc_media_player_stop(mediaPlayerHandle, ref ex); 
                } 
 
                //Dll动态导入 
                [DllImport("libvlc")] 
                private static extern MediaPlayerHandle libvlc_media_player_new_from_media(MediaHandle libvlc_media_handle, ref ExceptionStruct ex); 
 
                [DllImport("libvlc")] 
                private static extern void libvlc_video_set_parent(CoreHandle coreHandle, IntPtr hDT, refExceptionStruct ex); 
 
                [DllImport("libvlc")] 
                private static extern void libvlc_media_player_play(MediaPlayerHandle mediaPlayerHandle, ref ExceptionStruct ex); 
 
                [DllImport("libvlc")] 
                private static extern void libvlc_media_player_stop(MediaPlayerHandle mediaPlayerHandle, ref ExceptionStruct ex); 
        } 
}