private MCIResult SendMCICommand(string mciCommand, int retLen)
{
var mciResult = new MCIResult();
StringBuilder ret = null;
if (retLen > 0)
{
ret = new StringBuilder(retLen);
}
// send the command string to the MCI
mciResult.ReturnValue = mciSendString(mciCommand, ret, retLen, IntPtr.Zero);
// if an error was returned, raise the event, and throw exception if appropriate
if (mciResult.IsError())
{
var buffer = new StringBuilder(128);
mciGetErrorString(mciResult.ReturnValue, buffer, 128);
ret = buffer;
}
if (ret != null)
{
mciResult.ReturnMessage = ret.ToString();
}
else
{
mciResult.ReturnMessage = string.Empty;
}
return(mciResult);
}
private MCIResult SendMCICommand(string mciCommand, int retLen)
{
var mciResult = new MCIResult();
StringBuilder ret = null;
if (retLen > 0)
ret = new StringBuilder(retLen);
// send the command string to the MCI
mciResult.ReturnValue = mciSendString(mciCommand, ret, retLen, IntPtr.Zero);
// if an error was returned, raise the event, and throw exception if appropriate
if (mciResult.IsError())
{
var buffer = new StringBuilder(128);
mciGetErrorString(mciResult.ReturnValue, buffer, 128);
ret = buffer;
}
if (ret != null)
mciResult.ReturnMessage = ret.ToString();
else
mciResult.ReturnMessage = string.Empty;
return mciResult;
}
private static MCIResult ProcessMCIRequest(MCIRequest request, IntPtr hwndHandle = new IntPtr())
{
var mciResult = new MCIResult();
StringBuilder ret = null;
if (request.retLen > 0)
{
ret = new StringBuilder(request.retLen);
}
// send the command string to the MCI
mciResult.ReturnValue = mciSendString(request.MCICommand, ret, request.retLen, hwndHandle);
// if an error was returned, raise the event, and throw exception if appropriate
if (mciResult.IsError())
{
var buffer = new StringBuilder(128);
mciGetErrorString(mciResult.ReturnValue, buffer, 128);
ret = buffer;
}
if (ret != null)
{
mciResult.ReturnMessage = ret.ToString();
}
else
{
mciResult.ReturnMessage = string.Empty;
}
if (mciResult.IsError())
{
if (Error != null)
{
Error(new MCIErrorEventArgs(request.MCICommand, mciResult.ReturnValue, mciResult.ReturnMessage));
}
if (MCIErrorsThrowExceptions)
{
throw new MediaPlayerException(request.MCICommand, mciResult.ReturnValue, mciResult.ReturnMessage);
}
}
#if DEBUG
Console.WriteLine(string.Format("Sent at: {4} Tick Count: {0} Command: {1} Result: {2} '{3}'",
Environment.TickCount,
request.MCICommand,
mciResult.ReturnValue.ToString(),
mciResult.ReturnMessage,
request.Tick));
#endif
return(mciResult);
}
private void ThreadedMCIConsumer()
{
// as this is a background-thread, the loop exits
// when the thread is aborted from outside.
while (true)
{
lock (_monitorLock)
{
// wait for release of _monitorLock object;
// when this statement exits, a new mciCommand has been issued
Monitor.Wait(_monitorLock);
// the object has been released, so make the mci call
// from this thread and put the return value into the
// _syncMciResult field
_syncMciResult = SendMCICommand(_syncMciCommand, _syncMciRetLen);
// tell the other thread that a result has been obtained
Monitor.Pulse(_monitorLock); // this exits the Monitor.Wait(_monitorLock) command on the other thread
}
}
}
private static MCIResult ProcessMCIRequest(MCIRequest request, IntPtr hwndHandle = new IntPtr())
{
var mciResult = new MCIResult();
StringBuilder ret = null;
if (request.retLen > 0)
ret = new StringBuilder(request.retLen);
// send the command string to the MCI
mciResult.ReturnValue = mciSendString(request.MCICommand, ret, request.retLen, hwndHandle);
// if an error was returned, raise the event, and throw exception if appropriate
if (mciResult.IsError())
{
var buffer = new StringBuilder(128);
mciGetErrorString(mciResult.ReturnValue, buffer, 128);
ret = buffer;
}
if (ret != null)
mciResult.ReturnMessage = ret.ToString();
else
mciResult.ReturnMessage = string.Empty;
if (mciResult.IsError())
{
if (Error != null)
Error(new MCIErrorEventArgs(request.MCICommand, mciResult.ReturnValue, mciResult.ReturnMessage));
if (MCIErrorsThrowExceptions)
throw new MediaPlayerException(request.MCICommand, mciResult.ReturnValue, mciResult.ReturnMessage);
}
#if DEBUG
Console.WriteLine(string.Format("Sent at: {4} Tick Count: {0} Command: {1} Result: {2} '{3}'",
Environment.TickCount,
request.MCICommand,
mciResult.ReturnValue.ToString(),
mciResult.ReturnMessage,
request.Tick));
#endif
return mciResult;
}
private void ThreadedMCIConsumer()
{
// as this is a background-thread, the loop exits
// when the thread is aborted from outside.
while (true)
{
lock (_monitorLock)
{
// wait for release of _monitorLock object;
// when this statement exits, a new mciCommand has been issued
Monitor.Wait(_monitorLock);
// the object has been released, so make the mci call
// from this thread and put the return value into the
// _syncMciResult field
_syncMciResult = SendMCICommand(_syncMciCommand, _syncMciRetLen);
// tell the other thread that a result has been obtained
Monitor.Pulse(_monitorLock); // this exits the Monitor.Wait(_monitorLock) command on the other thread
}
}
}
