public void SendTestPatternSample(object state)
{
try
{
if (SampleReady != null && !_isDisposing)
{
lock (_vpxEncoder)
{
unsafe
{
byte[] sampleBuffer = null;
byte[] encodedBuffer = null;
var stampedTestPattern = _testPattern.Clone() as System.Drawing.Image;
AddTimeStampAndLocation(stampedTestPattern, DateTime.UtcNow.ToString("dd MMM yyyy HH:mm:ss:fff"), "Test Pattern");
sampleBuffer = VideoUtils.BitmapToRGB24(stampedTestPattern as System.Drawing.Bitmap);
fixed(byte *p = sampleBuffer)
{
byte[] convertedFrame = null;
_colorConverter.ConvertRGBtoYUV(p, VideoSubTypesEnum.BGR24, (int)_width, (int)_height, (int)_stride, VideoSubTypesEnum.I420, ref convertedFrame);
fixed(byte *q = convertedFrame)
{
int encodeResult = _vpxEncoder.Encode(q, convertedFrame.Length, 1, ref encodedBuffer);
if (encodeResult != 0)
{
throw new ApplicationException("VPX encode of video sample failed.");
}
}
}
stampedTestPattern.Dispose();
SampleReady?.Invoke(encodedBuffer);
}
}
}
}
catch (Exception excp)
{
logger.LogError("Exception SendTestPatternSample. " + excp);
}
}
/// <summary>
/// Used when the video source is originating as bitmaps produced locally. For example
/// the audio scope generates bitmaps in response to an audio signal. The generated bitmaps
/// then need to be encoded and transmitted to the remote party.
/// </summary>
/// <param name="bmp">The locally generated bitmap to transmit to the remote party.</param>
private void LocalBitmapAvailable(Bitmap bmp)
{
if (_vpxEncoder == null)
{
_extBmpWidth = bmp.Width;
_extBmpHeight = bmp.Height;
_extBmpStride = (int)VideoUtils.GetStride(bmp);
_vpxEncoder = new VpxEncoder();
int res = _vpxEncoder.InitEncoder((uint)bmp.Width, (uint)bmp.Height, (uint)_extBmpStride);
if (res != 0)
{
throw new ApplicationException("VPX encoder initialisation failed.");
}
_imgEncConverter = new ImageConvert();
}
var sampleBuffer = VideoUtils.BitmapToRGB24(bmp);
unsafe
{
fixed(byte *p = sampleBuffer)
{
byte[] convertedFrame = null;
_imgEncConverter.ConvertRGBtoYUV(p, VideoSubTypesEnum.BGR24, _extBmpWidth, _extBmpHeight, _extBmpStride, VideoSubTypesEnum.I420, ref convertedFrame);
fixed(byte *q = convertedFrame)
{
byte[] encodedBuffer = null;
int encodeResult = _vpxEncoder.Encode(q, convertedFrame.Length, 1, ref encodedBuffer);
if (encodeResult != 0)
{
throw new ApplicationException("VPX encode of video sample failed.");
}
base.SendVp8Frame(_rtpVideoTimestampPeriod, (int)SDPMediaFormatsEnum.VP8, encodedBuffer);
}
}
}
bmp.Dispose();
}
