private VideoCompressor(uint fccHandler)
{
// Init bitmap info header
Avi32Interop.BITMAPINFOHEADER bih = new Avi32Interop.BITMAPINFOHEADER();
bih.Init();
bih.biBitCount = bitCount;
bih.biCompression = 0;
bih.biWidth = bih.biHeight = biHeight;
bih.biPlanes = 1;
// Open compressor
IntPtr hic = Avi32Interop.ICOpen(Avi32Interop.ICTYPE_VIDEO, fccHandler, Avi32Interop.ICMODE_QUERY);
if (hic == IntPtr.Zero)
{
int errorCode = Marshal.GetLastWin32Error();
throw new AviException("ICOpen", errorCode);
}
try {
// Check if compressor supports specified format
int hr = Avi32Interop.ICCompressQuery(hic, ref bih, IntPtr.Zero);
if (hr != Avi32Interop.ICERR_OK)
{
throw new AviException("ICCompressQuery", hr);
}
// Get compressor info
Avi32Interop.ICINFO ici = new Avi32Interop.ICINFO();
ici.Init();
hr = Avi32Interop.ICGetInfo(hic, out ici, ici.biSize);
if (hr != 0)
{
this.name = ici.szDescription;
// Check quality support
bool supportsQuality = (ici.dwFlags & Avi32Interop.VIDCF_QUALITY) == Avi32Interop.VIDCF_QUALITY;
if (supportsQuality)
{
if (Avi32Interop.ICERR_OK == Avi32Interop.ICGetDefaultQuality(hic, ref this.quality))
{
this.supportsQuality = true;
}
}
else
{
this.quality = defaultQuality;
}
this.fccHandler = fccHandler;
this.fccHandlerString = FccHandlerToString(fccHandler);
}
else
{
throw new AviException("ICGetInfo", hr);
}
}
finally {
Avi32Interop.ICClose(hic);
}
}
public bool Configure(IntPtr owner)
{
IntPtr hic = Avi32Interop.ICOpen(Avi32Interop.ICTYPE_VIDEO, this.fccHandler, Avi32Interop.ICMODE_QUERY);
if (hic != IntPtr.Zero)
{
bool result = Avi32Interop.ICERR_OK == Avi32Interop.ICConfigure(hic, owner);
Avi32Interop.ICClose(hic);
return(result);
}
return(false);
}
private void SetupVideoCompressor(VideoCompressor compressor)
{
Avi32Interop.AVICOMPRESSOPTIONS compressorOptions = new Avi32Interop.AVICOMPRESSOPTIONS();
uint fccHandler = compressor.FccHandler;
compressorOptions.fccType = Avi32Interop.ICTYPE_VIDEO;
compressorOptions.fccHandler = fccHandler;
compressorOptions.dwQuality = (uint)compressor.Quality;
// Open compressor
IntPtr hic = Avi32Interop.ICOpen(Avi32Interop.ICTYPE_VIDEO, fccHandler, Avi32Interop.ICMODE_QUERY);
if (hic == IntPtr.Zero)
{
int errorCode = Marshal.GetLastWin32Error();
throw new AviException(errorCode, string.Format("ICOpen failed, error code = 0x{0:X8}.", errorCode));
}
// Get number of bytes required for params
uint cbParams = (uint)Avi32Interop.ICGetState(hic, IntPtr.Zero, 0);
IntPtr pParams = Marshal.AllocHGlobal((int)cbParams);
try {
// Get params
int retval = Avi32Interop.ICGetState(hic, pParams, cbParams);
compressorOptions.cbParms = cbParams;
// If the Xvid Video Codec is selected, hack params to hide status window!
if (string.Equals(compressor.FccHandlerString, xvidCodec))
{
ModifyXvidParams(pParams, (int)cbParams);
}
compressorOptions.lpParms = pParams;
compressorOptions.dwFlags = Avi32Interop.AVICOMPRESSF_VALID;
// Close compressor
Avi32Interop.ICClose(hic);
// Make compressed stream
int hr = Avi32Interop.AVIMakeCompressedStream(out this.pAviCompressedStream, this.pVideoStream,
ref compressorOptions, 0);
if (hr != 0)
{
throw new AviException(hr, string.Format("AVIMakeCompressedStream failed, error code = 0x{0:X8}.",
hr));
}
}
finally {
if (pParams != IntPtr.Zero)
{
Marshal.FreeHGlobal(pParams);
}
}
}
