private static void OnVideoResolutionChangedEvent(uint width, uint height, uint stride)
{
try
{
if (_vpxEncoder == null ||
(_vpxEncoder.GetWidth() != width || _vpxEncoder.GetHeight() != height || _vpxEncoder.GetStride() != stride))
{
_vpxEncoderReady = false;
if (_vpxEncoder != null)
{
_vpxEncoder.Dispose();
}
_vpxEncoder = new VpxEncoder();
_vpxEncoder.InitEncoder(width, height, stride);
logger.LogInformation($"VPX encoder initialised with width {width}, height {height} and stride {stride}.");
_vpxEncoderReady = true;
}
}
catch (Exception excp)
{
logger.LogWarning("Exception MfSampleGrabber_OnVideoResolutionChangedEvent. " + excp.Message);
}
}
public TestPatternVideoSource(string testPatternSource, int framesPerSecond)
{
_testPatternPath = testPatternSource;
_framesPerSecond = (framesPerSecond > 0 && framesPerSecond <= DEFAULT_FRAMES_PER_SECOND) ? framesPerSecond : DEFAULT_FRAMES_PER_SECOND;
_samplePeriod = 1000 / framesPerSecond;
if (!String.IsNullOrEmpty(testPatternSource) && !File.Exists(testPatternSource))
{
logger.LogWarning($"Requested test pattern file could not be found {testPatternSource}.");
}
if (_testPatternPath == null)
{
if (!File.Exists(FALLBACK_TEST_PATTERN_IMAGE_PATH))
{
throw new ApplicationException($"The fallback test pattern image file could not be found {FALLBACK_TEST_PATTERN_IMAGE_PATH}.");
}
else
{
_testPatternPath = FALLBACK_TEST_PATTERN_IMAGE_PATH;
}
}
logger.LogDebug($"Loading test pattern from {_testPatternPath}.");
_testPattern = new Bitmap(_testPatternPath);
// Get the stride.
Rectangle rect = new Rectangle(0, 0, _testPattern.Width, _testPattern.Height);
System.Drawing.Imaging.BitmapData bmpData =
_testPattern.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite,
_testPattern.PixelFormat);
_width = (uint)_testPattern.Width;
_height = (uint)_testPattern.Height;
// Get the address of the first line.
_stride = (uint)bmpData.Stride;
_testPattern.UnlockBits(bmpData);
// Initialise the video codec and color converter.
_vpxEncoder = new VpxEncoder();
_vpxEncoder.InitEncoder(_width, _height, _stride);
_colorConverter = new ImageConvert();
}
/// <summary>
/// Video resolution changed event handler.
/// </summary>
/// <param name="width">The new video frame width.</param>
/// <param name="height">The new video frame height.</param>
/// <param name="stride">The new video frame stride.</param>
private VpxEncoder InitialiseVpxEncoder(uint width, uint height, uint stride)
{
try
{
var vpxEncoder = new VpxEncoder();
vpxEncoder.InitEncoder(width, height, stride);
logger.LogInformation($"VPX encoder initialised with width {width}, height {height} and stride {stride}.");
return(vpxEncoder);
}
catch (Exception excp)
{
logger.LogWarning("Exception InitialiseVpxEncoder. " + excp.Message);
throw;
}
}
/// <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();
}
private async Task ExpireConnections()
{
try
{
logger.LogDebug("Starting expire connections thread.");
byte[] encodedBuffer = null;
if (File.Exists(_expiredImagePath))
{
Bitmap expiredImage = expiredImage = new Bitmap(_expiredImagePath);
// Get the stride.
Rectangle rect = new Rectangle(0, 0, expiredImage.Width, expiredImage.Height);
System.Drawing.Imaging.BitmapData bmpData =
expiredImage.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite,
expiredImage.PixelFormat);
// Get the address of the first line.
int stride = bmpData.Stride;
expiredImage.UnlockBits(bmpData);
// Initialise the video codec and color converter.
SIPSorceryMedia.VpxEncoder vpxEncoder = new VpxEncoder();
vpxEncoder.InitEncoder((uint)expiredImage.Width, (uint)expiredImage.Height, (uint)stride);
SIPSorceryMedia.ImageConvert colorConverter = new ImageConvert();
byte[] sampleBuffer = null;
sampleBuffer = BitmapToRGB24(expiredImage);
unsafe
{
fixed(byte *p = sampleBuffer)
{
byte[] convertedFrame = null;
colorConverter.ConvertRGBtoYUV(p, VideoSubTypesEnum.BGR24, expiredImage.Width, expiredImage.Height, stride, VideoSubTypesEnum.I420, ref convertedFrame);
fixed(byte *q = convertedFrame)
{
int encodeResult = vpxEncoder.Encode(q, convertedFrame.Length, 1, ref encodedBuffer);
if (encodeResult != 0)
{
logger.LogWarning("VPX encode of expired image failed.");
}
}
}
}
expiredImage.Dispose();
vpxEncoder.Dispose();
}
while (!_exit)
{
foreach (var conn in _webRtcConnections.Where(x => DateTime.Now.Subtract(x.Value.CreatedAt).TotalSeconds > _connectionTimeLimitSeconds).Select(x => x.Value))
{
OnMp4MediaSampleReady -= conn.SendMedia;
OnTestPatternSampleReady -= conn.SendMedia;
if (conn.WebRtcSession.IsDtlsNegotiationComplete && !conn.WebRtcSession.IsClosed && encodedBuffer != null)
{
// Send the expired frame 3 times as a crude attempt to cope with packet loss.
conn.SendMedia(SDPMediaTypesEnum.video, conn.LastVideoTimeStamp + VP8_TIMESTAMP_SPACING, encodedBuffer);
await Task.Delay(1);
conn.SendMedia(SDPMediaTypesEnum.video, conn.LastVideoTimeStamp + VP8_TIMESTAMP_SPACING, encodedBuffer);
await Task.Delay(1);
conn.SendMedia(SDPMediaTypesEnum.video, conn.LastVideoTimeStamp + VP8_TIMESTAMP_SPACING, encodedBuffer);
}
conn.WebRtcSession.Close("expired");
}
await Task.Delay(1000);
}
}
catch (Exception excp)
{
logger.LogError("Exception ExpireConnections. " + excp);
}
}
private async void SampleTestPattern()
{
try
{
logger.LogDebug("Starting test pattern sampling thread.");
_isTestPatternSampling = true;
Bitmap testPattern = new Bitmap(_testPatternImagePath);
// Get the stride.
Rectangle rect = new Rectangle(0, 0, testPattern.Width, testPattern.Height);
System.Drawing.Imaging.BitmapData bmpData =
testPattern.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite,
testPattern.PixelFormat);
// Get the address of the first line.
int stride = bmpData.Stride;
testPattern.UnlockBits(bmpData);
// Initialise the video codec and color converter.
SIPSorceryMedia.VpxEncoder vpxEncoder = new VpxEncoder();
vpxEncoder.InitEncoder((uint)testPattern.Width, (uint)testPattern.Height, (uint)stride);
SIPSorceryMedia.ImageConvert colorConverter = new ImageConvert();
byte[] sampleBuffer = null;
byte[] encodedBuffer = null;
int sampleCount = 0;
uint rtpTimestamp = 0;
while (!_exit)
{
if (OnTestPatternSampleReady == null)
{
logger.LogDebug("No active clients, test pattern sampling paused.");
break;
}
else
{
var stampedTestPattern = testPattern.Clone() as System.Drawing.Image;
AddTimeStampAndLocation(stampedTestPattern, DateTime.UtcNow.ToString("dd MMM yyyy HH:mm:ss:fff"), "Test Pattern");
sampleBuffer = BitmapToRGB24(stampedTestPattern as System.Drawing.Bitmap);
unsafe
{
fixed(byte *p = sampleBuffer)
{
byte[] convertedFrame = null;
colorConverter.ConvertRGBtoYUV(p, VideoSubTypesEnum.BGR24, testPattern.Width, testPattern.Height, stride, VideoSubTypesEnum.I420, ref convertedFrame);
fixed(byte *q = convertedFrame)
{
int encodeResult = vpxEncoder.Encode(q, convertedFrame.Length, 1, ref encodedBuffer);
if (encodeResult != 0)
{
logger.LogWarning("VPX encode of video sample failed.");
continue;
}
}
}
stampedTestPattern.Dispose();
OnTestPatternSampleReady?.Invoke(SDPMediaTypesEnum.video, rtpTimestamp, encodedBuffer);
sampleCount++;
rtpTimestamp += VP8_TIMESTAMP_SPACING;
}
await Task.Delay(30);
}
}
testPattern.Dispose();
vpxEncoder.Dispose();
}
catch (Exception excp)
{
logger.LogError("Exception SampleTestPattern. " + excp);
}
finally
{
logger.LogDebug("test pattern sampling thread stopped.");
_isTestPatternSampling = false;
}
}
private static void SendTestPattern()
{
try
{
unsafe
{
Bitmap testPattern = new Bitmap(TEST_PATTERN_IMAGE_PATH);
// Get the stride.
Rectangle rect = new Rectangle(0, 0, testPattern.Width, testPattern.Height);
System.Drawing.Imaging.BitmapData bmpData =
testPattern.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite,
testPattern.PixelFormat);
// Get the address of the first line.
int stride = bmpData.Stride;
testPattern.UnlockBits(bmpData);
// Initialise the video codec and color converter.
SIPSorceryMedia.VpxEncoder vpxEncoder = new VpxEncoder();
vpxEncoder.InitEncoder((uint)testPattern.Width, (uint)testPattern.Height, (uint)stride);
SIPSorceryMedia.ImageConvert colorConverter = new ImageConvert();
byte[] sampleBuffer = null;
byte[] encodedBuffer = null;
int sampleCount = 0;
uint rtpTimestamp = 0;
while (!_exit)
{
if (OnTestPatternSampleReady != null)
{
var stampedTestPattern = testPattern.Clone() as System.Drawing.Image;
AddTimeStampAndLocation(stampedTestPattern, DateTime.UtcNow.ToString("dd MMM yyyy HH:mm:ss:fff"), "Test Pattern");
sampleBuffer = BitmapToRGB24(stampedTestPattern as System.Drawing.Bitmap);
fixed(byte *p = sampleBuffer)
{
byte[] convertedFrame = null;
colorConverter.ConvertRGBtoYUV(p, VideoSubTypesEnum.BGR24, testPattern.Width, testPattern.Height, stride, VideoSubTypesEnum.I420, ref convertedFrame);
fixed(byte *q = convertedFrame)
{
int encodeResult = vpxEncoder.Encode(q, convertedFrame.Length, 1, ref encodedBuffer);
if (encodeResult != 0)
{
logger.LogWarning("VPX encode of video sample failed.");
continue;
}
}
}
stampedTestPattern.Dispose();
stampedTestPattern = null;
OnTestPatternSampleReady(rtpTimestamp, encodedBuffer);
encodedBuffer = null;
sampleCount++;
rtpTimestamp += VP8_TIMESTAMP_SPACING;
}
Thread.Sleep(30);
}
}
}
catch (Exception excp)
{
logger.LogError("Exception SendTestPattern. " + excp);
}
}
private void SampleWebCam(MFVideoSampler videoSampler, VideoMode videoMode, CancellationTokenSource cts)
{
try
{
Thread.CurrentThread.Name = "vidsampler_" + videoMode.DeviceIndex + "_" + videoMode.Width + "_" + videoMode.Height;
var vpxEncoder = new VpxEncoder();
// TODO: The last parameter passed to the vpx encoder init needs to be the frame stride not the width.
vpxEncoder.InitEncoder(Convert.ToUInt32(videoMode.Width), Convert.ToUInt32(videoMode.Height), Convert.ToUInt32(videoMode.Width));
// var videoSampler = new MFVideoSampler();
//videoSampler.Init(videoMode.DeviceIndex, videoMode.Width, videoMode.Height);
// videoSampler.InitFromFile();
while (!_stop && !cts.IsCancellationRequested)
{
byte[] videoSample = null;
var sample = videoSampler.GetSample(ref videoSample);
//if (result == NAudio.MediaFoundation.MediaFoundationErrors.MF_E_HW_MFT_FAILED_START_STREAMING)
//{
// logger.Warn("A sample could not be acquired from the local webcam. Check that it is not already in use.");
// OnLocalVideoError("A sample could not be acquired from the local webcam. Check that it is not already in use.");
// break;
//}
//else if (result != 0)
//{
// logger.Warn("A sample could not be acquired from the local webcam. Check that it is not already in use. Error code: " + result);
// OnLocalVideoError("A sample could not be acquired from the local webcam. Check that it is not already in use. Error code: " + result);
// break;
//}
//else
if (sample?.HasVideoSample == true)
{
// This event sends the raw bitmap to the WPF UI.
OnLocalVideoSampleReady?.Invoke(videoSample, videoSampler.Width, videoSampler.Height);
// This event encodes the sample and forwards it to the RTP manager for network transmission.
if (OnLocalVideoEncodedSampleReady != null)
{
IntPtr rawSamplePtr = Marshal.AllocHGlobal(videoSample.Length);
Marshal.Copy(videoSample, 0, rawSamplePtr, videoSample.Length);
byte[] yuv = null;
unsafe
{
// TODO: using width instead of stride.
_imageConverter.ConvertRGBtoYUV((byte *)rawSamplePtr, VideoSubTypesEnum.RGB24, Convert.ToInt32(videoMode.Width), Convert.ToInt32(videoMode.Height), Convert.ToInt32(videoMode.Width), VideoSubTypesEnum.I420, ref yuv);
//_imageConverter.ConvertToI420((byte*)rawSamplePtr, VideoSubTypesEnum.RGB24, Convert.ToInt32(videoMode.Width), Convert.ToInt32(videoMode.Height), ref yuv);
}
Marshal.FreeHGlobal(rawSamplePtr);
IntPtr yuvPtr = Marshal.AllocHGlobal(yuv.Length);
Marshal.Copy(yuv, 0, yuvPtr, yuv.Length);
byte[] encodedBuffer = null;
unsafe
{
vpxEncoder.Encode((byte *)yuvPtr, yuv.Length, _encodingSample++, ref encodedBuffer);
}
Marshal.FreeHGlobal(yuvPtr);
OnLocalVideoEncodedSampleReady(encodedBuffer);
}
}
}
videoSampler.Stop();
vpxEncoder.Dispose();
}
catch (Exception excp)
{
logger.LogError($"Exception SampleWebCam. {excp.Message}");
}
}