public static VideoCompressor[] GetAll(bool reload)
{
if (compressors != null && !reload)
{
// Compressors are cached so if a new one gets installed, apps need restart to get update data
return(compressors.ToArray());
}
compressors = new List <VideoCompressor>();
Avi32Interop.ICINFO ici = new Avi32Interop.ICINFO();
ici.Init();
int hr = int.MaxValue;
for (uint i = 0; hr != 0; i++)
{
// Get info for compressor #i
ici.biSize = (uint)Marshal.SizeOf(ici);
hr = Avi32Interop.ICInfo(Avi32Interop.ICTYPE_VIDEO, i, ref ici);
try {
// Create compressor using fccHandler
VideoCompressor compressor = new VideoCompressor(ici.fccHandler);
compressors.Add(compressor);
}
catch (AviException) {
}
}
return(compressors.ToArray());
}
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 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 VideoCompressor[] GetAll(bool reload)
{
if (compressors != null && !reload) {
// Compressors are cached so if a new one gets installed, apps need restart to get update data
return compressors.ToArray();
}
compressors = new List<VideoCompressor>();
Avi32Interop.ICINFO ici = new Avi32Interop.ICINFO();
ici.Init();
int hr = int.MaxValue;
for (uint i = 0; hr != 0; i++) {
// Get info for compressor #i
ici.biSize = (uint)Marshal.SizeOf(ici);
hr = Avi32Interop.ICInfo(Avi32Interop.ICTYPE_VIDEO, i, ref ici);
try {
// Create compressor using fccHandler
VideoCompressor compressor = new VideoCompressor(ici.fccHandler);
compressors.Add(compressor);
}
catch (AviException) {
}
}
return compressors.ToArray();
}