/// <summary>
/// Encodes a frame.
/// </summary>
/// <seealso cref="IVideoEncoder.EncodeFrame"/>
public int EncodeFrame(byte[] source, int srcOffset, byte[] destination, int destOffset, out bool isKeyFrame)
{
BitmapUtils.FlipVertical(source, srcOffset, sourceBuffer, 0, height, width * 4);
BitmapUtils.Bgr32ToBgr24(sourceBuffer, 0, destination, destOffset, width * height);
isKeyFrame = true;
return(MaxEncodedSize);
}
/// <summary>Encodes a frame.</summary>
public int EncodeFrame(byte[] source, int srcOffset, byte[] destination, int destOffset, out bool isKeyFrame)
{
Argument.IsNotNull(source, nameof(source));
Argument.IsNotNegative(srcOffset, nameof(srcOffset));
Argument.ConditionIsMet(srcOffset + 4 * width * height <= source.Length,
"Source end offset exceeds the source length.");
Argument.IsNotNull(destination, nameof(destination));
Argument.IsNotNegative(destOffset, nameof(destOffset));
#if NET5_0_OR_GREATER
return(EncodeFrame(source.AsSpan(srcOffset), destination.AsSpan(destOffset), out isKeyFrame));
#else
BitmapUtils.FlipVertical(source, srcOffset, sourceBuffer, 0, height, width * 4);
var sourceHandle = GCHandle.Alloc(sourceBuffer, GCHandleType.Pinned);
var encodedHandle = GCHandle.Alloc(destination, GCHandleType.Pinned);
try
{
var sourcePtr = sourceHandle.AddrOfPinnedObject();
var encodedPtr = encodedHandle.AddrOfPinnedObject();
return(EncodeFrame(sourcePtr, encodedPtr, (uint)(destination.Length - destOffset), out isKeyFrame));
}
finally
{
sourceHandle.Free();
encodedHandle.Free();
}
#endif
}
/// <summary>
/// Encodes a frame.
/// </summary>
/// <seealso cref="IVideoEncoder.EncodeFrame"/>
public int EncodeFrame(byte[] source, int srcOffset, byte[] destination, int destOffset, out bool isKeyFrame)
{
BitmapUtils.FlipVertical(source, srcOffset, sourceBuffer, 0, height, width * 4);
for (var i = 0; i < height; i++)
{
BitmapUtils.Bgr32ToBgr24(sourceBuffer, i * width * 4, destination, destOffset + i * stride, width);
}
isKeyFrame = true;
return(MaxEncodedSize);
}
/// <summary>Encodes a frame.</summary>
public unsafe int EncodeFrame(ReadOnlySpan <byte> source, Span <byte> destination, out bool isKeyFrame)
{
Argument.ConditionIsMet(4 * width * height <= source.Length,
"Source end offset exceeds the source length.");
BitmapUtils.FlipVertical(source, sourceBuffer, height, width * 4);
fixed(void *srcPtr = sourceBuffer, destPtr = destination)
{
var srcIntPtr = new IntPtr(srcPtr);
var destIntPtr = new IntPtr(destPtr);
return(EncodeFrame(srcIntPtr, destIntPtr, (uint)destination.Length, out isKeyFrame));
}
}
/// <summary>Encodes a frame.</summary>
/// <seealso cref="IVideoEncoder.EncodeFrame"/>
public int EncodeFrame(byte[] source, int srcOffset, byte[] destination, int destOffset, out bool isKeyFrame)
{
// TODO: Introduce Width and Height in IVideoRecorder and add Requires to EncodeFrame contract
Contract.Assert(srcOffset + 4 * width * height <= source.Length);
BitmapUtils.FlipVertical(source, srcOffset, sourceBuffer, 0, height, width * 4);
var sourceHandle = GCHandle.Alloc(sourceBuffer, GCHandleType.Pinned);
var encodedHandle = GCHandle.Alloc(destination, GCHandleType.Pinned);
try
{
var outInfo = outBitmapInfo;
outInfo.ImageSize = (uint)destination.Length;
var inInfo = inBitmapInfo;
int outFlags;
int chunkID;
var flags = framesFromLastKey >= keyFrameRate ? VfwApi.ICCOMPRESS_KEYFRAME : 0;
var result = VfwApi.ICCompress(compressorHandle, flags,
ref outInfo, encodedHandle.AddrOfPinnedObject(), ref inInfo, sourceHandle.AddrOfPinnedObject(),
out chunkID, out outFlags, frameIndex,
0, quality, IntPtr.Zero, IntPtr.Zero);
CheckICResult(result);
frameIndex++;
isKeyFrame = (outFlags & VfwApi.AVIIF_KEYFRAME) == VfwApi.AVIIF_KEYFRAME;
if (isKeyFrame)
{
framesFromLastKey = 1;
}
else
{
framesFromLastKey++;
}
return((int)outInfo.ImageSize);
}
finally
{
sourceHandle.Free();
encodedHandle.Free();
}
}
/// <summary>
/// Encodes a frame.
/// </summary>
/// <seealso cref="IVideoEncoder.EncodeFrame"/>
public int EncodeFrame(byte[] source, int srcOffset, byte[] destination, int destOffset, out bool isKeyFrame)
{
BitmapUtils.FlipVertical(source, srcOffset, destination, destOffset, _height, _width * _bytesPerPixel);
isKeyFrame = true;
return(MaxEncodedSize);
}
