public static void GetBitmapInfo(byte[] data, out int width, out int height, out int bpp)
{
var infoHeader = new BitmapInfoHeader();
int pos = 0;
int rawsize = Marshal.SizeOf(infoHeader.GetType());
IntPtr buffer = Marshal.AllocHGlobal(rawsize);
Marshal.Copy(data, pos, buffer, rawsize);
infoHeader = (BitmapInfoHeader)Marshal.PtrToStructure(buffer, infoHeader.GetType());
Marshal.FreeHGlobal(buffer);
width = infoHeader.biWidth;
height = infoHeader.biHeight;
bpp = infoHeader.biBitCount;
}
/// <summary>
/// Create new AVI file and open it for writing.
/// </summary>
///
/// <param name="fileName">AVI file name to create.</param>
/// <param name="width">Video width.</param>
/// <param name="height">Video height.</param>
///
/// <remarks><para>The method opens (creates) a video files, configure video codec and prepares
/// the stream for saving video frames with a help of <see cref="AddFrame"/> method.</para></remarks>
///
/// <exception cref="ApplicationException">Failure of opening video files (the exception message
/// specifies the issues).</exception>
///
public bool Open(string fileName, int width, int height)
{
lock (this) {
// calculate stride
stride = width * 4;
if ((stride % 4) != 0)
{
stride += (4 - stride % 4);
}
this.width = width;
this.height = height;
// describe new stream
Avi32.AVISTREAMINFO info = new Avi32.AVISTREAMINFO();
LOG.InfoFormat("Available codecs: {0}", String.Join(", ", Avi32.AvailableCodecs.ToArray()));
info.type = Avi32.mmioFOURCC("vids");
if (codec != null)
{
info.handler = Avi32.mmioFOURCC(codec);
}
else
{
info.handler = Avi32.mmioFOURCC("DIB ");
}
info.scale = 1;
info.rate = rate;
info.suggestedBufferSize = stride * height;
try {
// create new file
if (Avi32.AVIFileOpen(out file, fileName, Avi32.OpenFileMode.Create | Avi32.OpenFileMode.Write, IntPtr.Zero) != 0)
{
throw new ApplicationException("Failed opening file");
}
// create stream
if (Avi32.AVIFileCreateStream(file, out stream, ref info) != 0)
{
throw new ApplicationException("Failed creating stream");
}
// describe compression options
Avi32.AVICOMPRESSOPTIONS options = new Avi32.AVICOMPRESSOPTIONS();
// uncomment if video settings dialog is required to show
int retCode = 0;
if (codec == null)
{
retCode = Avi32.AVISaveOptions(stream, ref options);
if (retCode == 0)
{
LOG.Debug("Cancel clicked!");
return(false);
}
codec = Avi32.decode_mmioFOURCC(options.handler);
quality = options.quality;
}
else
{
options.handler = Avi32.mmioFOURCC(codec);
options.quality = quality;
}
LOG.DebugFormat("Codec {0} selected with quality {1}.", codec, quality);
AviError retval;
// create compressed stream
try {
retval = Avi32.AVIMakeCompressedStream(out streamCompressed, stream, ref options, IntPtr.Zero);
} catch (Exception exCompress) {
LOG.Warn("Couldn't use compressed stream.", exCompress);
retval = AviError.AVIERR_OK;
}
if (retval != AviError.AVIERR_OK)
{
throw new ApplicationException(string.Format("Failed creating compressed stream: {0}", retval));
}
// describe frame format
BitmapInfoHeader bitmapInfoHeader = new BitmapInfoHeader(width, height, 32);
// set frame format
if (streamCompressed != IntPtr.Zero)
{
retval = Avi32.AVIStreamSetFormat(streamCompressed, 0, ref bitmapInfoHeader, Marshal.SizeOf(bitmapInfoHeader.GetType()));
}
else
{
retval = Avi32.AVIStreamSetFormat(stream, 0, ref bitmapInfoHeader, Marshal.SizeOf(bitmapInfoHeader.GetType()));
}
if (retval != 0)
{
throw new ApplicationException(string.Format("Failed creating stream: {0}", retval));
}
position = 0;
return(true);
} catch (Exception ex) {
Close();
Avi32.AVIFileExit();
if (File.Exists(fileName))
{
File.Delete(fileName);
}
throw ex;
}
}
}
/// <summary>
/// Create new AVI file and open it for writing.
/// </summary>
///
/// <param name="fileName">AVI file name to create.</param>
/// <param name="width">Video width.</param>
/// <param name="height">Video height.</param>
///
/// <remarks><para>The method opens (creates) a video files, configure video codec and prepares
/// the stream for saving video frames with a help of <see cref="AddFrame"/> method.</para></remarks>
///
/// <exception cref="ApplicationException">Failure of opening video files (the exception message
/// specifies the issues).</exception>
///
public void Open(string fileName, int width, int height)
{
lock (this) {
// calculate stride
stride = width * 4;
if ((stride % 4) != 0)
{
stride += (4 - stride % 4);
}
// create new file
if (Avi32.AVIFileOpen(out file, fileName, Avi32.OpenFileMode.Create | Avi32.OpenFileMode.Write, IntPtr.Zero) != 0)
{
throw new ApplicationException("Failed opening file");
}
this.width = width;
this.height = height;
// describe new stream
Avi32.AVISTREAMINFO info = new Avi32.AVISTREAMINFO();
info.type = Avi32.mmioFOURCC("vids");
if (codec != null)
{
info.handler = Avi32.mmioFOURCC(codec);
}
else
{
info.handler = Avi32.mmioFOURCC("DIB ");
}
info.scale = 1;
info.rate = rate;
info.suggestedBufferSize = stride * height;
// create stream
if (Avi32.AVIFileCreateStream(file, out stream, ref info) != 0)
{
throw new ApplicationException("Failed creating stream");
}
// describe compression options
Avi32.AVICOMPRESSOPTIONS options = new Avi32.AVICOMPRESSOPTIONS();
// uncomment if video settings dialog is required to show
if (codec == null)
{
Avi32.AVISaveOptions(stream, ref options);
}
else
{
options.handler = Avi32.mmioFOURCC(codec);
options.quality = quality;
}
// create compressed stream
int retval = Avi32.AVIMakeCompressedStream(out streamCompressed, stream, ref options, IntPtr.Zero);
if (retval != 0)
{
throw new ApplicationException("Failed creating compressed stream: " + retval);
}
// describe frame format
BitmapInfoHeader bitmapInfoHeader = new BitmapInfoHeader(width, height, 32);
// set frame format
retval = Avi32.AVIStreamSetFormat(streamCompressed, 0, ref bitmapInfoHeader, Marshal.SizeOf(bitmapInfoHeader.GetType()));
if (retval != 0)
{
throw new ApplicationException("Failed creating compressed stream: " + retval);
}
position = 0;
}
}