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);
}
}
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 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 static int ICCompressQuery(IntPtr hic, ref Avi32Interop.BITMAPINFOHEADER lpbiInput, IntPtr lpbiOutput)
{
return(Avi32Interop.ICSendMessage(hic, Avi32Interop.ICM_COMPRESS_QUERY, ref lpbiInput,
(UIntPtr)((ulong)lpbiOutput)));
}
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);
}
}
