private void SetupVideo(DisplayFormat videoFormat, VideoCompressor compressor, int fps)
{
int colorDepth = Bitmap.GetPixelFormatSize(videoFormat.PixelFormat);
int width = videoFormat.Width;
int height = videoFormat.Height;
// Calculate pitch
int bytesPerPixel = colorDepth / 8;
int pitch = width * bytesPerPixel;
int pitch_factor = 4;
if (pitch % pitch_factor != 0)
{
pitch = pitch + pitch_factor - pitch % pitch_factor;
}
// Create AVI Stream
Avi32Interop.AVISTREAMINFO asf = new Avi32Interop.AVISTREAMINFO();
asf.dwRate = fps;
asf.dwSuggestedBufferSize = pitch * height * bytesPerPixel;
asf.dwScale = 1;
asf.fccType = Avi32Interop.streamtypeVIDEO;
asf.szName = null;
asf.rcFrame = new Avi32Interop.RECT(0, 0, width, height);
int hr = Avi32Interop.AVIFileCreateStream(this.pAviFile, out this.pVideoStream, ref asf);
if (hr != 0)
{
throw new AviException("AVIFileCreateStream", hr);
}
// Set stream format
Avi32Interop.BITMAPINFOHEADER bih = new Avi32Interop.BITMAPINFOHEADER();
bih.biBitCount = (ushort)colorDepth;
bih.biCompression = 0; // BI_RGB
bih.biHeight = videoFormat.Height;
bih.biPlanes = 1;
bih.biSize = (uint)Marshal.SizeOf(bih);
bih.biSizeImage = (uint)(pitch * height * (colorDepth / 8));
bih.biWidth = videoFormat.Width;
if (compressor != null && !compressor.Equals(VideoCompressor.None))
{
// Setup compressor
this.SetupVideoCompressor(compressor);
hr = Avi32Interop.AVIStreamSetFormat(this.pAviCompressedStream, 0, ref bih, Marshal.SizeOf(bih));
}
else
{
hr = Avi32Interop.AVIStreamSetFormat(this.pVideoStream, 0, ref bih, Marshal.SizeOf(bih));
}
if (hr != 0)
{
throw new AviException("AVIStreamSetFormat", hr);
}
}
private void SetupAudio(SoundFormat audioFormat, AcmEncoder audioEncoder)
{
IntPtr pwfx = audioFormat.ToPtr();
try {
Avi32Interop.AVISTREAMINFO asi = new Avi32Interop.AVISTREAMINFO();
asi.fccType = Avi32Interop.streamtypeAUDIO;
asi.dwScale = audioFormat.BlockAlign;
asi.dwRate = audioFormat.AverageBytesPerSecond;
asi.dwStart = 0;
asi.dwLength = -1;
asi.dwInitialFrames = 0;
asi.dwSuggestedBufferSize = 0;
asi.dwQuality = -1;
asi.dwSampleSize = audioFormat.BlockAlign;
int hr = Avi32Interop.AVIFileCreateStream(this.pAviFile, out this.pAudioStream, ref asi);
if (hr != 0)
{
throw new AviException("AVIStreamSetFormat", hr);
}
hr = Avi32Interop.AVIStreamSetFormat(this.pAudioStream, 0, pwfx, audioFormat.ToalSize);
if (hr != 0)
{
throw new AviException("AVIStreamSetFormat", hr);
}
if (audioEncoder != null)
{
audioEncoder.Open();
}
this.audioFormat = audioFormat;
this.audioEncoder = audioEncoder;
}
finally {
Marshal.FreeHGlobal(pwfx);
}
}
