public byte[] GetStreamData()
{
int streamLength;
int samples;
uint result = AviInterop.AVIStreamRead(StreamPointer, sampleOffset,
AviInterop.AvistreamreadConvenient, IntPtr.Zero, 0, out streamLength, out samples);
if (result != 0)
{
throw new Exception("Exception in AVIStreamRead: " + AviErrors.GetError(result));
}
IntPtr waveData = Marshal.AllocHGlobal(streamLength);
result = AviInterop.AVIStreamRead(StreamPointer, sampleOffset, samples,
waveData, streamLength, out streamLength, out samples);
if (result != 0)
{
throw new Exception("Exception in AVIStreamRead: " + AviErrors.GetError(result));
}
sampleOffset += samples;
var resultData = new byte[streamLength];
Marshal.Copy(waveData, resultData, 0, streamLength);
Marshal.FreeHGlobal(waveData);
return(resultData);
}
public AudioStream(int filePtr, IntPtr streamPtr)
: base(filePtr, streamPtr)
{
int size = Marshal.SizeOf(waveFormat);
AviInterop.AVIStreamReadFormat(StreamPointer, 0, ref waveFormat, ref size);
}
public void GetFrameClose()
{
isFrameOpen = false;
if (getFrameObject != 0)
{
AviInterop.AVIStreamGetFrameClose(getFrameObject);
getFrameObject = 0;
}
}
public void Close()
{
foreach (AviStream stream in streams)
{
stream.Close();
}
AviInterop.AVIFileRelease(aviFile);
AviInterop.AVIFileExit();
}
public AviFile(String filepath)
{
AviInterop.AVIFileInit();
uint result = AviInterop.AVIFileOpen(ref aviFile, filepath, AviInterop.OfRead, 0);
if (result > 0)
{
throw new Exception("Exception in AVIFileOpen: " + AviErrors.GetError(result));
}
}
protected AviInterop.StreamInfo GetStreamInfo()
{
var streamInfo = new AviInterop.StreamInfo();
uint result = AviInterop.AVIStreamInfo(StreamPointer, ref streamInfo,
Marshal.SizeOf(streamInfo));
if (result != 0)
{
throw new Exception("Exception in VideoStreamInfo: " + AviErrors.GetError(result));
}
return(streamInfo);
}
public AudioStream GetAudioStream()
{
IntPtr aviStream;
uint result = AviInterop.AVIFileGetStream(aviFile, out aviStream, AviInterop.StreamtypeAudio,
0);
if (result > 0)
{
throw new Exception("Exception in AVIFileGetStream: " + AviErrors.GetError(result));
}
var stream = new AudioStream(aviFile, aviStream);
streams.Add(stream);
return(stream);
}
public void GetFrameOpen()
{
var bih = new AviInterop.BitmapInfoHeader
{
biBitCount = CountBitsPerPixel,
biPlanes = 1
};
bih.biSize = Marshal.SizeOf(bih);
getFrameObject = AviInterop.AVIStreamGetFrameOpen(StreamPointer, ref bih);
if (getFrameObject == 0)
{
throw new CodecNotFoundException();
}
isFrameOpen = true;
}
public VideoStream(int filePtr, IntPtr streamPtr)
: base(filePtr, streamPtr)
{
var bih = new AviInterop.BitmapInfoHeader();
int size = Marshal.SizeOf(bih);
AviInterop.AVIStreamReadFormat(StreamPointer, 0, ref bih, ref size);
AviInterop.StreamInfo streamInfo = GetStreamInfo();
FrameRate = streamInfo.dwRate / (float)streamInfo.dwScale;
Width = streamInfo.rcFrame.right;
Height = streamInfo.rcFrame.bottom;
FrameSize = bih.biSizeImage;
CountBitsPerPixel = CalculateBitsPerPixel(bih.biBitCount);
FirstFrame = AviInterop.AVIStreamStart(StreamPointer);
CountFrames = AviInterop.AVIStreamLength(StreamPointer);
}
public byte[] GetStreamData(int position, out AviInterop.BitmapInfoHeader header)
{
if (!isFrameOpen)
throw new Exception("GetFrameOpen needs to be called before GetStreamData!");
int dib = AviInterop.AVIStreamGetFrame(getFrameObject, FirstFrame + position);
header = new AviInterop.BitmapInfoHeader();
header = (AviInterop.BitmapInfoHeader)Marshal.PtrToStructure((IntPtr)dib, header.GetType());
if (header.biSizeImage < 1)
throw new Exception("Exception in VideoStreamGetFrame");
int bihSize = Marshal.SizeOf(header);
var bitmapData =
new byte[header.biSizeImage + (header.biBitCount < 16 ? PaletteSize : 0)];
Marshal.Copy((IntPtr)(dib + bihSize), bitmapData, 0, bitmapData.Length);
return bitmapData;
}
public byte[] GetStreamData(int position, out AviInterop.BitmapInfoHeader header)
{
if (!isFrameOpen)
{
throw new Exception("GetFrameOpen needs to be called before GetStreamData!");
}
int dib = AviInterop.AVIStreamGetFrame(getFrameObject, FirstFrame + position);
header = new AviInterop.BitmapInfoHeader();
header = (AviInterop.BitmapInfoHeader)Marshal.PtrToStructure((IntPtr)dib, header.GetType());
if (header.biSizeImage < 1)
{
throw new Exception("Exception in VideoStreamGetFrame");
}
int bihSize = Marshal.SizeOf(header);
var bitmapData =
new byte[header.biSizeImage + (header.biBitCount < 16 ? PaletteSize : 0)];
Marshal.Copy((IntPtr)(dib + bihSize), bitmapData, 0, bitmapData.Length);
return(bitmapData);
}
public virtual void Close()
{
AviInterop.AVIStreamRelease(StreamPointer);
}