/// <summary>
/// Initialise an encoder job based on previously setup capture devices.
/// Need to have one job per 'ReductionFactor' in the config.
/// </summary>
private void EncoderSetup()
{
var factors = config.EncoderSettings.ReductionFactors;
Packages = new List <EncoderPackage>();
int fps = (cam != null) ? (cam.m_frameRate) : (config.Video.InputFrameRate);
var needed_packages = ListRequiredPackages();
int pkg_id = 0;
foreach (var np in needed_packages)
{
EncoderJob job = new EncoderJob();
job.OldSegmentNumber = 1;
string joined = Path.Combine(config.EncoderSettings.LocalSystemOutputFolder, config.EncoderSettings.LocalSystemFilePrefix);
joined += "_" + pkg_id;
int bitrate = (int)(config.EncoderSettings.VideoBitrate * np.Quality); // linear scale
int error = EncoderBridge.InitialiseEncoderJob(
ref job, // job to complete
np.VideoSize.Width, // OUTPUT video width
np.VideoSize.Height, // OUTPUT video height
joined, // OUTPUT folder + filename prefix
fps, // INPUT frame rate (output will match)
bitrate, // OUTPUT video bit rate
config.EncoderSettings.FragmentSeconds); // Fragment length (seconds)
if (error != 0)
{
throw new Exception("Encoder setup error #" + error);
}
if (!job.IsValid)
{
throw new Exception("Job rejected");
}
var mf = new MediaFrame();
mf.ForceAudioConsumption = (np.HasVideo) ? ((byte)0) : ((byte)1); // don't sync if no video.
var pkg = new EncoderPackage(np, pkg_id, job, mf);
ConnectPackageToBuffers(pkg, np);
Packages.Add(pkg); pkg_id++;
}
}
/// <summary>
/// Create, start and return a new core encoder thread.
/// </summary>
private Thread NewEncoderThread(EncoderPackage pkg)
{
ParameterizedThreadStart encodeLoop = new ParameterizedThreadStart(EncoderCoreLoop);
var encloop = new Thread(encodeLoop);
encloop.IsBackground = true; // When the parent thread ends, the encoder thread will be aborted.
encloop.SetApartmentState(ApartmentState.MTA);
// Don't use 'Highest' priority, as that can cause issues with the capture drivers (which will be working hard too)
encloop.Priority = ThreadPriority.AboveNormal;
encloop.Start(pkg); // start with the job id
return(encloop);
}
/// <summary>
/// Create encoder buffers for each package, and add to capture buffer lists.
/// </summary>
private void ConnectPackageToBuffers(EncoderPackage Package, PackageSpec Spec)
{
if (Spec.HasVideo && ImageBuffers != null)
{
var vbuf = new ImageBuffer(Spec.VideoSize.Width, Spec.VideoSize.Height);
ImageBuffers.Add(vbuf);
Package.Buffers.Add(vbuf);
}
if (Spec.HasAudio && AudioBuffers != null)
{
AudioBufferMono abuf = null;
if (mic != null)
{
abuf = new AudioBufferMono(mic.SampleRate, mic.Channels);
}
else
{
abuf = new AudioBufferMono(config.Audio.SampleRate, config.Audio.Channels);
}
AudioBuffers.Add(abuf);
Package.Buffers.Add(abuf);
}
}
/// <summary>
/// This loop does the actual work of reading caches into the encoder and firing actions.
/// This loop controls Multiple-bit-rate encoding
/// </summary>
private void EncoderCoreLoop(object Package)
{
EncoderPackage pkg = Package as EncoderPackage;
try {
#region Start up
if (pkg == null)
{
throw new Exception("Encoder core loop package was lost");
}
double lastVideoTime = 0.0; // used for Adaptive frame rate
if (cam != null)
{
lastVideoTime = cam.TimecodeStart;
}
int loop_frame_incr = 0;
if (pkg.Specification.HasVideo)
{
loop_frame_incr = 1;
videoJobs++;
}
#endregion
while (!EncoderRunning) // wait for the signal!
{
System.Threading.Thread.Sleep(1000);
}
WaitForSyncFlag();
start = DateTime.Now;
while (EncoderRunning) // Encode frames until stopped
{
#region Frame availability checks
// Wait for buffers to be populated
while (pkg.BuffersEmpty(MinimumBufferPopulation) && EncoderRunning)
{
foreach (var buf in pkg.Buffers)
{
buf.RebufferCapturedFrames();
}
if (pkg.BuffersEmpty(MinimumBufferPopulation))
{
System.Threading.Thread.Sleep(frameSleep);
}
}
if (DryRun)
{
System.Threading.Thread.Sleep(frameSleep);
continue; // don't encode
}
#endregion
pkg.LoadAllBuffers();
EncoderBridge.EncodeFrame(ref pkg.Job, ref pkg.Frame);
pkg.UnloadAllBuffers();
if (!pkg.Job.IsValid)
{
throw new Exception("Job became invalid. Possible memory or filesystem error");
}
#region Segment switching
if (pkg.Job.SegmentNumber != pkg.Job.OldSegmentNumber)
{
double real_chunk_duration = pkg.Frame.VideoSampleTime - lastVideoTime;
lock (outputRouter) {
outputRouter.NewChunkAvailable(pkg.Job.OldSegmentNumber, pkg.JobIndex, real_chunk_duration);
}
lastVideoTime = pkg.Frame.VideoSampleTime;
pkg.Job.OldSegmentNumber = pkg.Job.SegmentNumber;
}
FrameCount += loop_frame_incr;
#endregion
}
} catch (Exception ex) {
System.Diagnostics.Debug.Fail("EncoderController.cs: Core loop fault.", ex.Message + "\r\n" + ex.StackTrace);
File.WriteAllText(config.EncoderSettings.LocalSystemOutputFolder + @"/error.txt", "Main loop: " + ex.Message + "\r\n" + ex.StackTrace);
} finally {
if (pkg != null)
{
EncoderBridge.CloseEncoderJob(ref pkg.Job); // NEVER FORGET THIS!!
}
if (EncoderRunning)
{
Halt(); // Don't use 'Stop()' in the core loop, or the system will freeze!
}
System.Threading.Thread.CurrentThread.Abort();
}
}
/// <summary>
/// Create, start and return a new core encoder thread.
/// </summary>
private Thread NewEncoderThread(EncoderPackage pkg)
{
ParameterizedThreadStart encodeLoop = new ParameterizedThreadStart(EncoderCoreLoop);
var encloop = new Thread(encodeLoop);
encloop.IsBackground = true; // When the parent thread ends, the encoder thread will be aborted.
encloop.SetApartmentState(ApartmentState.MTA);
// Don't use 'Highest' priority, as that can cause issues with the capture drivers (which will be working hard too)
encloop.Priority = ThreadPriority.AboveNormal;
encloop.Start(pkg); // start with the job id
return encloop;
}
/// <summary>
/// Initialise an encoder job based on previously setup capture devices.
/// Need to have one job per 'ReductionFactor' in the config.
/// </summary>
private void EncoderSetup()
{
var factors = config.EncoderSettings.ReductionFactors;
Packages = new List<EncoderPackage>();
int fps = (cam != null) ? (cam.m_frameRate) : (config.Video.InputFrameRate);
var needed_packages = ListRequiredPackages();
int pkg_id = 0;
foreach (var np in needed_packages) {
EncoderJob job = new EncoderJob();
job.OldSegmentNumber = 1;
string joined = Path.Combine(config.EncoderSettings.LocalSystemOutputFolder, config.EncoderSettings.LocalSystemFilePrefix);
joined += "_" + pkg_id;
int bitrate = (int)(config.EncoderSettings.VideoBitrate * np.Quality); // linear scale
int error = EncoderBridge.InitialiseEncoderJob(
ref job, // job to complete
np.VideoSize.Width, // OUTPUT video width
np.VideoSize.Height, // OUTPUT video height
joined, // OUTPUT folder + filename prefix
fps, // INPUT frame rate (output will match)
bitrate, // OUTPUT video bit rate
config.EncoderSettings.FragmentSeconds); // Fragment length (seconds)
if (error != 0) throw new Exception("Encoder setup error #" + error);
if (!job.IsValid) throw new Exception("Job rejected");
var mf = new MediaFrame();
mf.ForceAudioConsumption = (np.HasVideo) ? ((byte)0) : ((byte)1); // don't sync if no video.
var pkg = new EncoderPackage(np, pkg_id, job, mf);
ConnectPackageToBuffers(pkg, np);
Packages.Add(pkg); pkg_id++;
}
}
/// <summary>
/// Create encoder buffers for each package, and add to capture buffer lists.
/// </summary>
private void ConnectPackageToBuffers(EncoderPackage Package, PackageSpec Spec)
{
if (Spec.HasVideo && ImageBuffers != null) {
var vbuf = new ImageBuffer(Spec.VideoSize.Width, Spec.VideoSize.Height);
ImageBuffers.Add(vbuf);
Package.Buffers.Add(vbuf);
}
if (Spec.HasAudio && AudioBuffers != null) {
AudioBufferMono abuf = null;
if (mic != null) abuf = new AudioBufferMono(mic.SampleRate, mic.Channels);
else abuf = new AudioBufferMono(config.Audio.SampleRate, config.Audio.Channels);
AudioBuffers.Add(abuf);
Package.Buffers.Add(abuf);
}
}
