private void btnGo_Click(object sender, EventArgs e)
{
if (_recorder.Recording)
{
_recorder.Stop();
SetR(false);
}
else
{
SetR(true);
_settings = new RecordSettings(
outputPath: txtPath.Text,
captureRectangle: ((ScreenInfo)cmbScreen.SelectedItem).Rect,
fps: (int)nudFramerate.Value,
interval: (int)nudFreq.Value,
codec: (VideoCodec)cmbFormat.SelectedItem,
bitrate: (int)budBitrate.Value << 20,
splitInterval: chkSplit.Checked?(double?)nudSplitInterval.Value :null,
onFrameWritten: (a) => BeginInvoke((Action)(() => lblTime.Text = $"Elapsed :{a.ToString("g") }")),
realtime: chkRealtime.Checked
);
_recorder.Start(
_settings
);
}
}
private void StartRecordingClicked(object sender, EventArgs e)
{
if (_recorder.Recording)
{
_recorder.Stop();
SetRecordingState(false);
}
else
{
SetRecordingState(true);
this._settings = new RecordSettings(
outputPath: txtPath.Text,
captureRectangle: ((ScreenInfo)cmbScreen.SelectedItem).Rect,
fps: (int)nudFramerate.Value,
interval: (int)nudFreq.Value,
codec: (VideoCodec)cmbFormat.SelectedItem,
bitrate: (int)budBitrate.Value << 20,
splitInterval: chkSplit.Checked ? (double?)nudSplitInterval.Value : null,
onFrameWritten: (a) => BeginInvoke((Action)(() => lblTime.Text = string.Format(Locale.Locale.ElapsedFormatStirng, a))),
realtime: chkRealtime.Checked,
snapperType: (SnapperType)cmbSnapper.SelectedItem
);
_recorder.Start(
_settings
);
}
}
private void PreprocessFrame(Bitmap bmp, RecordSettings settings)
{
if (!settings.Private)
{
return;
}
using (var gr = Graphics.FromImage(bmp)) {
gr.Clear(Color.Black);
}
}
public void Start(RecordSettings settings)
{
var timer = new Timer();
if (Recording)
{
throw new InvalidOperationException("Recording is already started");
}
Recording = true;
Task.Factory.StartNew(async() => await StartInternal(settings).ConfigureAwait(false), TaskCreationOptions.LongRunning).ConfigureAwait(false);
}
private static ISnapper GetSnapper(RecordSettings settings)
{
switch (settings.SnapperType)
{
case SnapperType.DirectX: return(new DXSnapper());
case SnapperType.Legacy: return(new SDGSnapper());
default: throw new ArgumentOutOfRangeException($"Invalid snapper: {settings.SnapperType}");
}
}
private async Task StartInternal(RecordSettings settings)
{
try {
try {
Thread.CurrentThread.Priority = ThreadPriority.Highest;
}
catch (Exception ex) { }
_stopwatch = _stopwatch ?? new Stopwatch();
_stopwatch.Reset();
_stopwatch.Start();
_stopWaiter.Reset();
if (!Directory.Exists(settings.OutputPath))
{
Directory.CreateDirectory(settings.OutputPath);
}
const double second = 1000;
const double minute = second * 60;
const int quant = 10; //timeouts don't include process switching
var inputSnapInterval = (int)Math.Max((settings.Realtime ? second / settings.Fps : settings.Interval), 0); //snap every N ms
var splitInterval = settings.SplitInterval * minute / inputSnapInterval; //split every N frames
var inputExpectedFps = inputSnapInterval > 0 ? second / inputSnapInterval : 0;
var sourceRect = settings.CaptureRectangle;
var framesWritten = 0L;
using (var tmr = new Timer()) {
tmr.Interval = 100;
tmr.Elapsed += (a, b) => settings.OnFrameWritten(_stopwatch.Elapsed);
tmr.Start();
while (Recording)
{
var outfile = Path.Combine(settings.OutputPath, DateTime.Now.ToFileTime().ToString() + ".avi");
using (var outstream = new VideoFileWriter()) {
outstream.Open(outfile, sourceRect.Width, sourceRect.Height, settings.Fps, settings.Codec, settings.Bitrate);
using (ISnapper snapper = new DXSnapper()) {
using (var processingSemaphore = new SemaphoreSlim(snapper.MaxProcessingThreads)) {
using (var writeSemaphore = new SemaphoreSlim(1)) {
snapper.SetSource(sourceRect);
var dropNextNFrames = 0;
var lastSyncFrames = framesWritten;
double lastSyncTime = _stopwatch.ElapsedMilliseconds;
var emptyFramesSinceLastSync = 0;
var crashedFramesSinceLastSync = 0;
var slowFramewsSinceLastSync = 0;
for (var i = 0L; (splitInterval == null || i < splitInterval) && Recording; i++)
{
Task tsk = null;
Bitmap currentFrame = null;
try {
framesWritten++;
//drop frame if required
if (dropNextNFrames > 0 && currentFrame != null)
{
dropNextNFrames--;
lastSyncTime = _stopwatch.ElapsedMilliseconds;
lastSyncFrames = framesWritten;
outstream.WriteVideoFrame(currentFrame);
continue;
}
tsk = Task.Delay(inputSnapInterval - quant);
/*
* these bitmaps are actually the same object or null -> we only have to dispose it once
*/
var elapsedBeforeCurrentSnap = _stopwatch.Elapsed.TotalMilliseconds;
await processingSemaphore.WaitAsync().ConfigureAwait(false);
var tmp = await snapper.Snap(inputSnapInterval).ConfigureAwait(false);
var elapsedAfterCurrentSnap = _stopwatch.Elapsed.TotalMilliseconds;
if (elapsedAfterCurrentSnap - elapsedBeforeCurrentSnap > inputSnapInterval)
{
//Debug.WriteLine($"[F**K] slow snap: {elapsedAfterCurrentSnap - elapsedBeforeCurrentSnap}ms");
slowFramewsSinceLastSync++;
}
if (tmp == null)
{
//Debug.WriteLine("[F**K] empty snap");
emptyFramesSinceLastSync++;
}
currentFrame = tmp ?? currentFrame;
//Debug.WriteLine($"[SNAP] {_stopwatch.ElapsedMilliseconds} ms");
//settings.OnFrameWritten?.Invoke(_stopwatch.Elapsed);
}
catch (Exception ex) {
//Debug.WriteLine($"[F**K] crashed on snap: {ex.Message}");
crashedFramesSinceLastSync++;
}
try {
Task.Run(async() => {
try {
if (currentFrame != null) //offload to separate thread
{
PreprocessFrame(currentFrame, settings);
await writeSemaphore.WaitAsync().ConfigureAwait(false);
try {
outstream.WriteVideoFrame(currentFrame);
}
finally {
writeSemaphore.Release();
}
}
}
finally {
processingSemaphore.Release();
}
}).ConfigureAwait(false);
}
catch (Exception ex) {
//todo: crashed frame logging
}
double elapsedNow = _stopwatch.ElapsedMilliseconds;
var elapsedSinceLastSync = elapsedNow - lastSyncTime;
if (elapsedSinceLastSync >= second)
{
var framesSinceLastSync = framesWritten - lastSyncFrames;
//only relevant for realtime+ recordings
var recentFps = framesSinceLastSync * second / elapsedSinceLastSync;
var recentFpsDelta = recentFps - inputExpectedFps;
Console.WriteLine($"{framesSinceLastSync} frames({emptyFramesSinceLastSync} empty, {crashedFramesSinceLastSync} crashed, {slowFramewsSinceLastSync} slow) in last {elapsedSinceLastSync.ToString("F")} ms ({recentFps.ToString("F")} fps). Total FPS: {( framesWritten * second / elapsedNow ).ToString("F")}. Expected: {inputExpectedFps.ToString("F")}");
#if !PERF
if (recentFpsDelta > 1) //faster than expected && at least one actual frame
{
tsk.Wait(); //wait for the current loop
//Debug.WriteLine($"[F**K] Slow down, fella: {recentFpsDelta} frames");
Task.Delay((int)(inputSnapInterval * recentFpsDelta - quant)).Wait();
}
else if (recentFpsDelta < -1)//too slow
{
dropNextNFrames = -(int)recentFpsDelta;
//Debug.WriteLine($"[F**K] dropping {dropNextNFrames} frames");
}
#endif
lastSyncFrames = framesWritten;
lastSyncTime = elapsedNow;
emptyFramesSinceLastSync = 0;
crashedFramesSinceLastSync = 0;
slowFramewsSinceLastSync = 0;
}
#if !PERF
tsk?.Wait();
#endif
}
await writeSemaphore.WaitAsync().ConfigureAwait(false);
}
}
}
}
}
tmr.Stop();
}
}
catch (Exception ex) {
//Debug.WriteLine(ex.Message);
//global
}
finally {
_stopwatch?.Stop();
_stopWaiter.Set();
}
}