public VlcException()
: base()
{
IntPtr errorPointer = LibVlc.libvlc_errmsg();
_err = errorPointer == IntPtr.Zero ? "VLC Exception"
: Marshal.PtrToStringAuto(errorPointer);
}
private void TryDispose()
{
if (playerState == 1)
{
TryStop();
}
LibVlc.libvlc_release(VlcInstanceHandle);
tryDisposeSemaphore.Release();
}
private void TryPlay()
{
using (VlcMedia media = new VlcMedia(VlcInstanceHandle, mLocation))
{
VlcMediaPlayerHandle = LibVlc.libvlc_media_player_new_from_media(media.Handle);
if (VlcMediaPlayerHandle == IntPtr.Zero)
{
throw new VlcException();
}
}
LibVlc.libvlc_media_player_set_hwnd(VlcMediaPlayerHandle, mDrawHandle);
LibVlc.libvlc_media_player_play(VlcMediaPlayerHandle);
}
public VlcMedia(IntPtr VlcInstanceHandle, string location)
{
byte[] retArray = Encoding.UTF8.GetBytes(location);
byte[] retArrayZ = new byte[retArray.Length + 1];
Array.Copy(retArray, retArrayZ, retArray.Length);
retArrayZ[retArrayZ.Length - 1] = 0;
IntPtr url = Marshal.AllocHGlobal(retArrayZ.Length);
Marshal.Copy(retArrayZ, 0, url, retArrayZ.Length);
Handle = LibVlc.libvlc_media_new_location(VlcInstanceHandle, url);
if (Handle == IntPtr.Zero)
{
throw new VlcException();
}
}
private void TryStop()
{
LibVlc.libvlc_media_player_stop(VlcMediaPlayerHandle);
LibVlc.libvlc_media_player_release(VlcMediaPlayerHandle);
}
public SimpleRtspPlayer(string location, IntPtr drawHandle)
{
mLocation = location;
mDrawHandle = drawHandle;
VlcInstanceHandle = LibVlc.libvlc_new(args.Length, args);
if (VlcInstanceHandle == IntPtr.Zero)
{
throw new VlcException();
}
Thread tt = new Thread(() =>
{
int vlcState;
int command;
while (true)
{
command = checkCommand();
switch (command)
{
//没有命令
case -1:
if (playerState == 1)
{
//IDLE/CLOSE=0, OPENING=1, BUFFERING=2, PLAYING=3, PAUSED=4, STOPPING=5, ENDED=6, ERROR=7
vlcState = LibVlc.libvlc_media_player_get_state(VlcMediaPlayerHandle);
if (vlcState == 7 || vlcState == 6) //检测到错误，重启并暂停0.5秒
{
//停止播放
TryStop();
TryPlay();
Thread.Sleep(500);
}
else //没有检测到错误，暂停0.1秒
{
Thread.Sleep(100);
}
}
else //入口：没有命令且stop状态
{
tmpSemaphore.Wait();
}
break;
case 0: //停止播放命令
if (playerState == 1)
{
TryStop();
playerState = 0;
//第一次wait消耗信号
tmpSemaphore.Wait();
//第二次wait等待信号
tmpSemaphore.Wait();
}
else
{
//此次的信号由case 0：playerState == 1消耗
//但是在停止状态，所以继续wait
tmpSemaphore.Wait();
}
break;
case 1: //开始播放命令
if (playerState != 1)
{ //此次的信号由case 0：playerState == 1消耗
TryPlay();
playerState = 1;
}
else
{
//只需要消耗一个信号
tmpSemaphore.Wait();
}
break;
//垃圾回收命令,不是break，而是return。
case 2:
//消耗一个信号
if (playerState == 1)
{
tmpSemaphore.Wait();
}
TryDispose();
return;
}
}
});
tt.IsBackground = true;
tt.Start();
}
public void Dispose()
{
LibVlc.libvlc_media_release(Handle);
}
