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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="HandBrakeInstance.cs" company="HandBrake Project (http://handbrake.fr)">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// A wrapper for a HandBrake instance.
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrake.ApplicationServices.Interop
{
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Runtime.ExceptionServices;
using System.Runtime.InteropServices;
using System.Timers;
using System.Windows.Media.Imaging;
using HandBrake.ApplicationServices.Interop.EventArgs;
using HandBrake.ApplicationServices.Interop.Factories;
using HandBrake.ApplicationServices.Interop.HbLib;
using HandBrake.ApplicationServices.Interop.Helpers;
using HandBrake.ApplicationServices.Interop.Interfaces;
using HandBrake.ApplicationServices.Interop.Json.Encode;
using HandBrake.ApplicationServices.Interop.Json.Scan;
using HandBrake.ApplicationServices.Interop.Json.Shared;
using HandBrake.ApplicationServices.Interop.Json.State;
using HandBrake.ApplicationServices.Interop.Model;
using HandBrake.ApplicationServices.Interop.Model.Encoding;
using HandBrake.ApplicationServices.Interop.Model.Preview;
using HandBrake.ApplicationServices.Services.Logging;
using HandBrake.ApplicationServices.Services.Logging.Model;
using Newtonsoft.Json;
using Size = HandBrake.ApplicationServices.Interop.Model.Size;
/// <summary>
/// A wrapper for a HandBrake instance.
/// </summary>
public class HandBrakeInstance : IHandBrakeInstance, IDisposable
{
/// <summary>
/// The number of MS between status polls when scanning.
/// </summary>
private const double ScanPollIntervalMs = 200;
/// <summary>
/// The number of MS between status polls when encoding.
/// </summary>
private const double EncodePollIntervalMs = 200;
/// <summary>
/// The native handle to the HandBrake instance.
/// </summary>
private IntPtr hbHandle;
/// <summary>
/// The number of previews created during scan.
/// </summary>
private int previewCount;
/// <summary>
/// The timer to poll for scan status.
/// </summary>
private Timer scanPollTimer;
/// <summary>
/// The timer to poll for encode status.
/// </summary>
private Timer encodePollTimer;
/// <summary>
/// The list of titles on this instance.
/// </summary>
private JsonScanObject titles;
/// <summary>
/// The index of the default title.
/// </summary>
private int featureTitle;
/// <summary>
/// A value indicating whether this object has been disposed or not.
/// </summary>
private bool disposed;
/// <summary>
/// Finalizes an instance of the HandBrakeInstance class.
/// </summary>
~HandBrakeInstance()
{
this.Dispose(false);
}
/// <summary>
/// Fires for progress updates when scanning.
/// </summary>
public event EventHandler<ScanProgressEventArgs> ScanProgress;
/// <summary>
/// Fires when a scan has completed.
/// </summary>
public event EventHandler<System.EventArgs> ScanCompleted;
/// <summary>
/// Fires for progress updates when encoding.
/// </summary>
public event EventHandler<EncodeProgressEventArgs> EncodeProgress;
/// <summary>
/// Fires when an encode has completed.
/// </summary>
public event EventHandler<EncodeCompletedEventArgs> EncodeCompleted;
/// <summary>
/// Gets the handle.
/// </summary>
internal IntPtr Handle
{
get
{
return this.hbHandle;
}
}
/// <summary>
/// Gets the number of previews created during scan.
/// </summary>
public int PreviewCount
{
get
{
return this.previewCount;
}
}
/// <summary>
/// Gets the list of titles on this instance.
/// </summary>
public JsonScanObject Titles
{
get
{
return this.titles;
}
}
/// <summary>
/// Gets the index of the default title.
/// </summary>
public int FeatureTitle
{
get
{
return this.featureTitle;
}
}
/// <summary>
/// Gets the HandBrake version string.
/// </summary>
public string Version
{
get
{
var versionPtr = HBFunctions.hb_get_version(this.hbHandle);
return Marshal.PtrToStringAnsi(versionPtr);
}
}
/// <summary>
/// Gets the HandBrake build number.
/// </summary>
public int Build
{
get
{
return HBFunctions.hb_get_build(this.hbHandle);
}
}
/// <summary>
/// Initializes this instance.
/// </summary>
/// <param name="verbosity">
/// The code for the logging verbosity to use.
/// </param>
public void Initialize(int verbosity)
{
HandBrakeUtils.EnsureGlobalInit();
HandBrakeUtils.RegisterLogger();
this.hbHandle = HBFunctions.hb_init(verbosity, update_check: 0);
}
/// <summary>
/// Starts a scan of the given path.
/// </summary>
/// <param name="path">
/// The path of the video to scan.
/// </param>
/// <param name="previewCount">
/// The number of previews to make on each title.
/// </param>
/// <param name="minDuration">
/// The minimum duration of a title to show up on the scan.
/// </param>
/// <param name="titleIndex">
/// The title index to scan (1-based, 0 for all titles).
/// </param>
public void StartScan(string path, int previewCount, TimeSpan minDuration, int titleIndex)
{
this.previewCount = previewCount;
IntPtr pathPtr = InteropUtilities.ToUtf8PtrFromString(path);
HBFunctions.hb_scan(this.hbHandle, pathPtr, titleIndex, previewCount, 1, (ulong)(minDuration.TotalSeconds * 90000));
Marshal.FreeHGlobal(pathPtr);
this.scanPollTimer = new Timer();
this.scanPollTimer.Interval = ScanPollIntervalMs;
// Lambda notation used to make sure we can view any JIT exceptions the method throws
this.scanPollTimer.Elapsed += (o, e) =>
{
try
{
this.PollScanProgress();
}
catch (Exception exc)
{
Debug.WriteLine(exc);
}
};
this.scanPollTimer.Start();
}
/// <summary>
/// Stops an ongoing scan.
/// </summary>
[HandleProcessCorruptedStateExceptions]
public void StopScan()
{
HBFunctions.hb_scan_stop(this.hbHandle);
}
/// <summary>
/// Gets an image for the given job and preview
/// </summary>
/// <remarks>
/// Only incorporates sizing and aspect ratio into preview image.
/// </remarks>
/// <param name="settings">
/// The encode job to preview.
/// </param>
/// <param name="previewNumber">
/// The index of the preview to get (0-based).
/// </param>
/// <returns>
/// An image with the requested preview.
/// </returns>
[HandleProcessCorruptedStateExceptions]
public BitmapImage GetPreview(PreviewSettings settings, int previewNumber)
{
SourceTitle title = this.Titles.TitleList.FirstOrDefault(t => t.Index == settings.TitleNumber);
Validate.NotNull(title, "GetPreview: Title should not have been null. This is probably a bug.");
// Create the Expected Output Geometry details for libhb.
hb_geometry_settings_s uiGeometry = new hb_geometry_settings_s
{
crop = new[] { settings.Cropping.Top, settings.Cropping.Bottom, settings.Cropping.Left, settings.Cropping.Right },
itu_par = 0,
keep = (int)AnamorphicFactory.KeepSetting.HB_KEEP_WIDTH + (settings.KeepDisplayAspect ? 0x04 : 0), // TODO Keep Width?
maxWidth = settings.MaxWidth,
maxHeight = settings.MaxHeight,
mode = (int)(hb_anamorphic_mode_t)settings.Anamorphic,
modulus = settings.Modulus ?? 16,
geometry = new hb_geometry_s
{
height = settings.Height,
width = settings.Width,
par = settings.Anamorphic != Anamorphic.Custom
? new hb_rational_t { den = title.Geometry.PAR.Den, num = title.Geometry.PAR.Num }
: new hb_rational_t { den = settings.PixelAspectY, num = settings.PixelAspectX }
}
};
// Sanitize the input.
Geometry resultGeometry = AnamorphicFactory.CreateGeometry(settings, new SourceVideoInfo(new Size(title.Geometry.Width, title.Geometry.Height), new Size(title.Geometry.PAR.Num, title.Geometry.PAR.Den)));
int width = resultGeometry.Width * resultGeometry.PAR.Num / resultGeometry.PAR.Den;
int height = resultGeometry.Height;
uiGeometry.geometry.width = width;
uiGeometry.geometry.height = height;
uiGeometry.geometry.par.num = settings.PixelAspectX;
uiGeometry.geometry.par.den = settings.PixelAspectY;
// Fetch the image data from LibHb
IntPtr resultingImageStuct = HBFunctions.hb_get_preview2(this.hbHandle, settings.TitleNumber, previewNumber, ref uiGeometry, 0);
hb_image_s image = InteropUtilities.ToStructureFromPtr<hb_image_s>(resultingImageStuct);
// Copy the filled image buffer to a managed array.
int stride_width = image.plane[0].stride;
int stride_height = image.plane[0].height_stride;
int imageBufferSize = stride_width * stride_height; // int imageBufferSize = outputWidth * outputHeight * 4;
byte[] managedBuffer = new byte[imageBufferSize];
Marshal.Copy(image.plane[0].data, managedBuffer, 0, imageBufferSize);
var bitmap = new Bitmap(width, height);
BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, PixelFormat.Format32bppRgb);
IntPtr ptr = bitmapData.Scan0; // Pointer to the first pixel.
for (int i = 0; i < image.height; i++)
{
try
{
Marshal.Copy(managedBuffer, i * stride_width, ptr, stride_width);
ptr = IntPtr.Add(ptr, width * 4);
}
catch (Exception exc)
{
Debug.WriteLine(exc); // In theory, this will allow a partial image display if this happens. TODO add better logging of this.
}
}
bitmap.UnlockBits(bitmapData);
// Close the image so we don't leak memory.
IntPtr nativeJobPtrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(IntPtr)));
Marshal.WriteIntPtr(nativeJobPtrPtr, resultingImageStuct);
HBFunctions.hb_image_close(nativeJobPtrPtr);
Marshal.FreeHGlobal(nativeJobPtrPtr);
// Create a Bitmap Image for display.
using (var memoryStream = new MemoryStream())
{
try
{
bitmap.Save(memoryStream, ImageFormat.Bmp);
}
finally
{
bitmap.Dispose();
}
var wpfBitmap = new BitmapImage();
wpfBitmap.BeginInit();
wpfBitmap.CacheOption = BitmapCacheOption.OnLoad;
wpfBitmap.StreamSource = memoryStream;
wpfBitmap.EndInit();
wpfBitmap.Freeze();
return wpfBitmap;
}
}
/// <summary>
/// Determines if DRC can be applied to the given track with the given encoder.
/// </summary>
/// <param name="trackNumber">The track Number.</param>
/// <param name="encoder">The encoder to use for DRC.</param>
/// <param name="title">The title.</param>
/// <returns>True if DRC can be applied to the track with the given encoder.</returns>
public bool CanApplyDrc(int trackNumber, HBAudioEncoder encoder, int title)
{
return HBFunctions.hb_audio_can_apply_drc2(this.hbHandle, title, trackNumber, encoder.Id) > 0;
}
/// <summary>
/// Starts an encode with the given job.
/// </summary>
/// <param name="encodeObject">
/// The encode Object.
/// </param>
[HandleProcessCorruptedStateExceptions]
public void StartEncode(JsonEncodeObject encodeObject)
{
JsonSerializerSettings settings = new JsonSerializerSettings
{
NullValueHandling = NullValueHandling.Ignore,
};
string encode = JsonConvert.SerializeObject(encodeObject, Formatting.Indented, settings);
HBFunctions.hb_add_json(this.hbHandle, InteropUtilities.ToUtf8PtrFromString(encode));
HBFunctions.hb_start(this.hbHandle);
this.encodePollTimer = new Timer();
this.encodePollTimer.Interval = EncodePollIntervalMs;
this.encodePollTimer.Elapsed += (o, e) =>
{
try
{
this.PollEncodeProgress();
}
catch (Exception exc)
{
Debug.WriteLine(exc);
}
};
this.encodePollTimer.Start();
}
/// <summary>
/// Pauses the current encode.
/// </summary>
[HandleProcessCorruptedStateExceptions]
public void PauseEncode()
{
HBFunctions.hb_pause(this.hbHandle);
}
/// <summary>
/// Resumes a paused encode.
/// </summary>
[HandleProcessCorruptedStateExceptions]
public void ResumeEncode()
{
HBFunctions.hb_resume(this.hbHandle);
}
/// <summary>
/// Stops the current encode.
/// </summary>
[HandleProcessCorruptedStateExceptions]
public void StopEncode()
{
HBFunctions.hb_stop(this.hbHandle);
// Also remove all jobs from the queue (in case we stopped a 2-pass encode)
var currentJobs = new List<IntPtr>();
int jobs = HBFunctions.hb_count(this.hbHandle);
for (int i = 0; i < jobs; i++)
{
currentJobs.Add(HBFunctions.hb_job(this.hbHandle, 0));
}
foreach (IntPtr job in currentJobs)
{
HBFunctions.hb_rem(this.hbHandle, job);
}
}
/// <summary>
/// Frees any resources associated with this object.
/// </summary>
public void Dispose()
{
if (this.disposed)
{
return;
}
this.Dispose(true);
GC.SuppressFinalize(this);
}
/// <summary>
/// Gets a value indicating whether the object is disposed.
/// </summary>
public bool IsDisposed
{
get
{
return this.disposed;
}
}
/// <summary>
/// Frees any resources associated with this object.
/// </summary>
/// <param name="disposing">
/// True if managed objects as well as unmanaged should be disposed.
/// </param>
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
// Free other state (managed objects).
}
// Free unmanaged objects.
IntPtr handlePtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(IntPtr)));
Marshal.WriteIntPtr(handlePtr, this.hbHandle);
HBFunctions.hb_close(handlePtr);
Marshal.FreeHGlobal(handlePtr);
this.disposed = true;
}
/// <summary>
/// Checks the status of the ongoing scan.
/// </summary>
[HandleProcessCorruptedStateExceptions]
private void PollScanProgress()
{
IntPtr json = HBFunctions.hb_get_state_json(this.hbHandle);
string statusJson = Marshal.PtrToStringAnsi(json);
LogHelper.LogMessage(new LogMessage(statusJson, LogMessageType.progressJson, LogLevel.debug));
JsonState state = JsonConvert.DeserializeObject<JsonState>(statusJson);
if (state != null && state.State == NativeConstants.HB_STATE_SCANNING)
{
if (this.ScanProgress != null)
{
this.ScanProgress(this, new ScanProgressEventArgs
{
Progress = state.Scanning.Progress,
CurrentPreview = state.Scanning.Preview,
Previews = state.Scanning.PreviewCount,
CurrentTitle = state.Scanning.Title,
Titles = state.Scanning.TitleCount
});
}
}
else if (state != null && state.State == NativeConstants.HB_STATE_SCANDONE)
{
var jsonMsg = HBFunctions.hb_get_title_set_json(this.hbHandle);
string scanJson = InteropUtilities.ToStringFromUtf8Ptr(jsonMsg);
LogHelper.LogMessage(new LogMessage(scanJson, LogMessageType.scanJson, LogLevel.debug));
this.titles = JsonConvert.DeserializeObject<JsonScanObject>(scanJson);
this.featureTitle = this.titles.MainFeature;
this.scanPollTimer.Stop();
if (this.ScanCompleted != null)
{
this.ScanCompleted(this, new System.EventArgs());
}
}
}
/// <summary>
/// Checks the status of the ongoing encode.
/// </summary>
/// <summary>
/// Checks the status of the ongoing encode.
/// </summary>
[HandleProcessCorruptedStateExceptions]
private void PollEncodeProgress()
{
IntPtr json = HBFunctions.hb_get_state_json(this.hbHandle);
string statusJson = Marshal.PtrToStringAnsi(json);
LogHelper.LogMessage(new LogMessage(statusJson, LogMessageType.progressJson, LogLevel.debug));
JsonState state = JsonConvert.DeserializeObject<JsonState>(statusJson);
if (state != null && state.State == NativeConstants.HB_STATE_WORKING)
{
if (this.EncodeProgress != null)
{
var progressEventArgs = new EncodeProgressEventArgs
{
FractionComplete = state.Working.Progress,
CurrentFrameRate = state.Working.Rate,
AverageFrameRate = state.Working.RateAvg,
EstimatedTimeLeft = new TimeSpan(state.Working.Hours, state.Working.Minutes, state.Working.Seconds),
Pass = state.Working.Pass,
PassCount = state.Working.PassCount
};
this.EncodeProgress(this, progressEventArgs);
}
}
else if (state != null && state.State == NativeConstants.HB_STATE_WORKDONE)
{
this.encodePollTimer.Stop();
if (this.EncodeCompleted != null)
{
this.EncodeCompleted(this, new EncodeCompletedEventArgs
{
Error = state.WorkDone.Error != (int)hb_error_code.HB_ERROR_NONE
});
}
}
}
}
}
|