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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="HandBrakeUnitConversionHelpers.cs" company="HandBrake Project (https://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>
// Defines the HandrakeUnitConversionHelpers type.
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrake.Interop.Interop
{
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Runtime.InteropServices;
using HandBrake.Interop.Interop.HbLib;
using HandBrake.Interop.Interop.Helpers;
using HandBrake.Interop.Interop.Model;
using HandBrake.Interop.Interop.Model.Encoding;
/// <summary>
/// Converters for various encoding values.
/// </summary>
public static class HandBrakeUnitConversionHelpers
{
private static readonly Dictionary<double, int> VideoRates;
/// <summary>
/// Initializes static members of the HandBrakeUnitConversionHelpers class.
/// </summary>
static HandBrakeUnitConversionHelpers()
{
if (!HandBrakeUtils.IsInitialised())
{
throw new Exception("Please Initialise with HandBrakeUtils.EnsureGlobalInit before using!");
}
VideoRates = new Dictionary<double, int>();
foreach (var framerate in HandBrakeEncoderHelpers.VideoFramerates)
{
VideoRates.Add(double.Parse(framerate.Name, CultureInfo.InvariantCulture), framerate.Rate);
}
}
/// <summary>
/// Convert Framerate to Video Rates
/// </summary>
/// <param name="framerate">
/// The framerate.
/// </param>
/// <returns>
/// The vrate if a valid framerate is passed in.
/// </returns>
/// <exception cref="ArgumentException">
/// Thrown when framerate is invalid.
/// </exception>
public static int FramerateToVrate(double framerate)
{
if (!VideoRates.ContainsKey(framerate))
{
throw new ArgumentException("Framerate not recognized.", "framerate");
}
return VideoRates[framerate];
}
public static int GetFramerateFromName(string name)
{
IntPtr frameratePrt = Marshal.StringToHGlobalAnsi(name);
return HBFunctions.hb_video_framerate_get_from_name(frameratePrt);
}
/// <summary>
/// Converts the PTS amount to a TimeSpan. There may be some accuracy loss here.
/// </summary>
/// <param name="pts">
/// The PTS to convert.
/// </param>
/// <returns>
/// The timespan for it.
/// </returns>
public static TimeSpan PtsToTimeSpan(ulong pts)
{
return TimeSpan.FromTicks((long)((pts * 10000000) / 90000));
}
/// <summary>
/// Converts the PTS amount to seconds.
/// </summary>
/// <param name="pts">
/// The PTS to convert.
/// </param>
/// <returns>
/// The corresponding number of seconds.
/// </returns>
public static double PtsToSeconds(ulong pts)
{
return (double)pts / 90000;
}
/// <summary>
/// Converts a native HB encoder structure to an Encoder model.
/// </summary>
/// <param name="encoder">
/// The structure to convert.
/// </param>
/// <returns>
/// The converted model.
/// </returns>
internal static HBVideoEncoder NativeToVideoEncoder(hb_encoder_s encoder)
{
return new HBVideoEncoder(encoder.muxers, encoder.name, encoder.codec, encoder.short_name);
}
/// <summary>
/// Converts a native HB encoder structure to an Encoder model.
/// </summary>
/// <param name="encoder">
/// The structure to convert.
/// </param>
/// <returns>
/// The converted model.
/// </returns>
internal static HBAudioEncoder NativeToAudioEncoder(hb_encoder_s encoder)
{
var result = new HBAudioEncoder(
encoder.muxers,
HandBrakeEncoderHelpers.GetAudioCompressionLimits(encoder.codec),
HBFunctions.hb_audio_compression_get_default((uint)encoder.codec),
HBFunctions.hb_audio_quality_get_default((uint)encoder.codec),
encoder.name,
encoder.codec,
HandBrakeEncoderHelpers.GetAudioQualityLimits(encoder.codec),
encoder.short_name);
return result;
}
/// <summary>
/// Converts a native HB rate structure to an HBRate object.
/// </summary>
/// <param name="rate">
/// The structure to convert.
/// </param>
/// <returns>
/// The converted rate object.
/// </returns>
internal static HBRate NativeToRate(hb_rate_s rate)
{
return new HBRate(rate.name, rate.rate);
}
/// <summary>
/// Converts a native HB mixdown structure to a Mixdown model.
/// </summary>
/// <param name="mixdown">
/// The structure to convert.
/// </param>
/// <returns>
/// The converted model.
/// </returns>
internal static HBMixdown NativeToMixdown(hb_mixdown_s mixdown)
{
return new HBMixdown(mixdown.name, mixdown.amixdown, mixdown.short_name);
}
/// <summary>
/// Converts a native HB container structure into an HBContainer object.
/// </summary>
/// <param name="container">
/// The structure to convert.
/// </param>
/// <returns>
/// The converted structure.
/// </returns>
internal static HBContainer NativeToContainer(hb_container_s container)
{
return new HBContainer(container.default_extension, container.name, container.format, container.short_name);
}
/// <summary>
/// Converts a native language structure to a Language object.
/// </summary>
/// <param name="language">
/// The structure to convert.
/// </param>
/// <returns>
/// The converted structure.
/// </returns>
internal static Language NativeToLanguage(iso639_lang_t language)
{
string englishName = InteropUtilities.ToStringFromUtf8Ptr(language.eng_name);
string nativeName = InteropUtilities.ToStringFromUtf8Ptr(language.native_name);
return new Language(englishName, nativeName, language.iso639_2);
}
}
}
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