/// <summary>
/// Acquires a video codec configuration from the user
/// </summary>
public IDisposable AcquireVideoCodecToken(IntPtr hwnd)
{
if (!IsOpen)
{
throw new InvalidOperationException("File must be opened before acquiring a codec token (or else the stream formats wouldnt be known)");
}
//encoder params
Win32.AVICOMPRESSOPTIONS comprOptions = new Win32.AVICOMPRESSOPTIONS();
if (currVideoCodecToken != null)
{
comprOptions = currVideoCodecToken.comprOptions;
}
if (AVISaveOptions(pAviRawVideoStream, ref comprOptions, hwnd) != 0)
{
CodecToken ret = CodecToken.TakePossession(comprOptions);
// save to config as well
Global.Config.AVICodecToken = ret.Serialize();
return(ret);
}
else
{
return(null);
}
}
/// <summary>
/// Acquires a video codec configuration from the user. you may save it for future use, but you must dispose of it when you're done with it.
/// returns null if the user canceled the dialog
/// </summary>
public IDisposable AcquireVideoCodecToken(IDialogParent parent, Config config)
{
var tempParams = new Parameters
{
height = 256,
width = 256,
fps = 60,
fps_scale = 1,
a_bits = 16,
a_samplerate = 44100,
a_channels = 2
};
var temp = new AviWriterSegment();
string tempfile = Path.GetTempFileName();
File.Delete(tempfile);
tempfile = Path.ChangeExtension(tempfile, "avi");
temp.OpenFile(tempfile, tempParams, null);
var ret = temp.AcquireVideoCodecToken(parent.SelfAsHandle.Handle, _currVideoCodecToken);
CodecToken token = (CodecToken)ret;
config.AviCodecToken = token?.Serialize();
temp.CloseFile();
File.Delete(tempfile);
return(token);
}
/// <summary>
/// Acquires a video codec configuration from the user
/// </summary>
public IDisposable AcquireVideoCodecToken(IntPtr hwnd, CodecToken lastCodecToken)
{
if (!IsOpen)
{
throw new InvalidOperationException("File must be opened before acquiring a codec token (or else the stream formats wouldnt be known)");
}
if (lastCodecToken != null)
{
currVideoCodecToken = lastCodecToken;
}
//encoder params
Win32.AVICOMPRESSOPTIONS comprOptions = new Win32.AVICOMPRESSOPTIONS();
if (currVideoCodecToken != null)
{
currVideoCodecToken.AllocateToAVICOMPRESSOPTIONS(ref comprOptions);
}
bool result = AVISaveOptions(pAviRawVideoStream, ref comprOptions, hwnd) != 0;
CodecToken ret = CodecToken.CreateFromAVICOMPRESSOPTIONS(ref comprOptions);
//so, AVISaveOptions may have changed some of the pointers
//if it changed the pointers, did it it free the old ones? we don't know
//let's assume it frees them. if we're wrong, we leak. if we assume otherwise and we're wrong, we may crash.
//so that means any pointers that come in here are either
//1. ones we allocated a minute ago
//2. ones VFW allocated
//guess what? doesn't matter. We'll free them all ourselves.
CodecToken.DeallocateAVICOMPRESSOPTIONS(ref comprOptions);
if (result)
{
// save to config and return it
Global.Config.AVICodecToken = ret.Serialize();
return(ret);
}
else
{
return(null);
}
}