private void GenerateTestPattern(object state)
{
lock (_sendTestPatternTimer)
{
if (!_isClosed && (OnVideoSourceRawSample != null || OnVideoSourceEncodedSample != null))
{
_frameCount++;
StampI420Buffer(_testI420Buffer, TEST_PATTERN_WIDTH, TEST_PATTERN_HEIGHT, _frameCount);
if (OnVideoSourceRawSample != null)
{
GenerateRawSample(TEST_PATTERN_WIDTH, TEST_PATTERN_HEIGHT, _testI420Buffer);
}
if (_videoEncoder != null && OnVideoSourceEncodedSample != null && !_formatManager.SelectedFormat.IsEmpty())
{
var encodedBuffer = _videoEncoder.EncodeVideo(TEST_PATTERN_WIDTH, TEST_PATTERN_HEIGHT, _testI420Buffer, VideoPixelFormatsEnum.I420, _formatManager.SelectedFormat.Codec);
if (encodedBuffer != null)
{
uint fps = (_frameSpacing > 0) ? 1000 / (uint)_frameSpacing : DEFAULT_FRAMES_PER_SECOND;
uint durationRtpTS = VIDEO_SAMPLING_RATE / fps;
OnVideoSourceEncodedSample.Invoke(durationRtpTS, encodedBuffer);
}
}
if (_frameCount == int.MaxValue)
{
_frameCount = 0;
}
}
}
}
private void GenerateTestPattern(object state)
{
lock (_sendTestPatternTimer)
{
if (!_isClosed && (OnVideoSourceRawSample != null || OnVideoSourceEncodedSample != null))
{
_frameCount++;
//var stampedTestPattern = _testPattern.Clone() as System.Drawing.Image;
//AddTimeStampAndLocation(stampedTestPattern, DateTime.UtcNow.ToString("dd MMM yyyy HH:mm:ss:fff"), "Test Pattern");
//// This event handler could get removed while the timestamp text is being added.
//OnVideoSourceRawSample?.Invoke((uint)_frameSpacing, _testPattern.Width, _testPattern.Height, BitmapToBGR24(stampedTestPattern as Bitmap), VideoPixelFormatsEnum.Bgr);
//stampedTestPattern?.Dispose();
//OnVideoSourceRawSample?.Invoke((uint)_frameSpacing, _testPatternWidth, _testPatternHeight, _testPatternI420, VideoPixelFormatsEnum.I420);
StampI420Buffer(_testI420Buffer, TEST_PATTERN_WIDTH, TEST_PATTERN_HEIGHT, _frameCount);
OnVideoSourceRawSample?.Invoke((uint)_frameSpacing, TEST_PATTERN_WIDTH, TEST_PATTERN_HEIGHT,
_testI420Buffer, VideoPixelFormatsEnum.I420);
if (_videoEncoder != null && OnVideoSourceEncodedSample != null)
{
var encodedBuffer = _videoEncoder.EncodeVideo(TEST_PATTERN_WIDTH, TEST_PATTERN_HEIGHT,
_testI420Buffer, VideoPixelFormatsEnum.I420, VideoCodecsEnum.VP8);
if (encodedBuffer != null)
{
uint fps = (_frameSpacing > 0) ? 1000 / (uint)_frameSpacing : DEFAULT_FRAMES_PER_SECOND;
uint durationRtpTS = VIDEO_SAMPLING_RATE / fps;
OnVideoSourceEncodedSample.Invoke(durationRtpTS, encodedBuffer);
}
}
if (_frameCount == int.MaxValue)
{
_frameCount = 0;
}
}
}
}
/// <summary>
/// Event handler for video frames for the local video capture device.
/// </summary>
private async void FrameArrivedHandler(MediaFrameReader sender, MediaFrameArrivedEventArgs e)
{
if (!_isClosed)
{
if (!_videoFormatManager.SelectedFormat.IsEmpty() && (OnVideoSourceEncodedSample != null || OnVideoSourceRawSample != null))
{
using (var mediaFrameReference = sender.TryAcquireLatestFrame())
{
var videoMediaFrame = mediaFrameReference?.VideoMediaFrame;
var softwareBitmap = videoMediaFrame?.SoftwareBitmap;
if (softwareBitmap == null && videoMediaFrame != null)
{
var videoFrame = videoMediaFrame.GetVideoFrame();
softwareBitmap = await SoftwareBitmap.CreateCopyFromSurfaceAsync(videoFrame.Direct3DSurface);
}
if (softwareBitmap != null)
{
int width = softwareBitmap.PixelWidth;
int height = softwareBitmap.PixelHeight;
if (softwareBitmap.BitmapPixelFormat != BitmapPixelFormat.Nv12)
{
softwareBitmap = SoftwareBitmap.Convert(softwareBitmap, BitmapPixelFormat.Nv12, BitmapAlphaMode.Ignore);
}
// Swap the processed frame to _backBuffer and dispose of the unused image.
softwareBitmap = Interlocked.Exchange(ref _backBuffer, softwareBitmap);
using (BitmapBuffer buffer = _backBuffer.LockBuffer(BitmapBufferAccessMode.Read))
{
using (var reference = buffer.CreateReference())
{
unsafe
{
byte *dataInBytes;
uint capacity;
reference.As <IMemoryBufferByteAccess>().GetBuffer(out dataInBytes, out capacity);
byte[] nv12Buffer = new byte[capacity];
Marshal.Copy((IntPtr)dataInBytes, nv12Buffer, 0, (int)capacity);
if (OnVideoSourceEncodedSample != null)
{
lock (_videoEncoder)
{
var encodedBuffer = _videoEncoder.EncodeVideo(width, height, nv12Buffer, EncoderInputFormat, _videoFormatManager.SelectedFormat.Codec);
if (encodedBuffer != null)
{
uint fps = (_fpsDenominator > 0 && _fpsNumerator > 0) ? _fpsNumerator / _fpsDenominator : DEFAULT_FRAMES_PER_SECOND;
uint durationRtpTS = VIDEO_SAMPLING_RATE / fps;
OnVideoSourceEncodedSample.Invoke(durationRtpTS, encodedBuffer);
}
if (_forceKeyFrame)
{
_forceKeyFrame = false;
}
}
}
if (OnVideoSourceRawSample != null)
{
uint frameSpacing = 0;
if (_lastFrameAt != DateTime.MinValue)
{
frameSpacing = Convert.ToUInt32(DateTime.Now.Subtract(_lastFrameAt).TotalMilliseconds);
}
var bgrBuffer = PixelConverter.NV12toBGR(nv12Buffer, width, height, width * 3);
OnVideoSourceRawSample(frameSpacing, width, height, bgrBuffer, VideoPixelFormatsEnum.Bgr);
}
}
}
}
_backBuffer?.Dispose();
softwareBitmap?.Dispose();
}
_lastFrameAt = DateTime.Now;
}
}
}
}
