gstreamer/sources/custom/Value.cs

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// Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
// Copyright (C) 2013 Stephan Sundermann <stephansundermann@gmail.com>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
// Wrapper for GLib.Value to add support for GstFraction, GstFourcc, Gst*Range, ...
using System;
using System.Text;
using System.Collections;
using System.Runtime.InteropServices;
using GLib;
/* TODO: intersect, compare, substract, .... */
namespace Gst
{
public struct Fraction
{
public int Numerator {
get {
return numerator;
}
set {
numerator = value;
Reduce ();
}
}
public int Denominator {
get {
return denominator;
}
set {
if (denominator == 0)
throw new ArgumentException ();
denominator = value;
Reduce ();
}
}
private int numerator;
private int denominator;
public static GLib.GType GType {
get {
return new GType (gst_fraction_get_type ());
}
}
private void Reduce ()
{
int gcd = GreatestCommonDivisor (this);
if (gcd != 0) {
this.numerator /= gcd;
this.denominator /= gcd;
}
}
private static int GreatestCommonDivisor (Fraction fraction)
{
int a = fraction.numerator;
int b = fraction.denominator;
while (b != 0) {
int temp = a;
a = b;
b = temp % b;
}
return Math.Abs (a);
}
public Fraction (int numerator, int denominator)
{
if (denominator == 0)
throw new ArgumentException ();
this.numerator = numerator;
this.denominator = denominator;
Reduce ();
}
public Fraction (GLib.Value val) : this ()
{
this.numerator = gst_value_get_fraction_numerator (ref val);
this.denominator = gst_value_get_fraction_denominator (ref val);
}
public void SetGValue (ref GLib.Value val)
{
gst_value_set_fraction (ref val, Numerator, Denominator);
}
public override string ToString ()
{
return String.Format ("{0}/{1}", numerator, denominator);
}
public static explicit operator GLib.Value (Fraction fraction)
{
GLib.Value val = new GLib.Value (Fraction.GType);
gst_value_set_fraction (ref val, fraction.Numerator, fraction.Denominator);
return val;
}
public static explicit operator double (Fraction fraction)
{
return ((double)fraction.numerator) / ((double)fraction.denominator);
}
public static Fraction operator + (Fraction a, Fraction b)
{
return new Fraction ((a.Numerator * b.Denominator) + (b.Numerator * a.Denominator), a.Denominator * b.Denominator);
}
public static Fraction operator - (Fraction a, Fraction b)
{
return new Fraction ((a.Numerator * b.Denominator) - (b.Numerator * a.Denominator), a.Denominator * b.Denominator);
}
public static Fraction operator * (Fraction a, Fraction b)
{
return new Fraction (a.Numerator * b.Numerator, a.Denominator * b.Denominator);
}
public static Fraction operator / (Fraction a, Fraction b)
{
return new Fraction (a.Numerator * b.Denominator, a.Denominator * b.Numerator);
}
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern void gst_value_set_fraction (ref GLib.Value v, int numerator, int denominator);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern int gst_value_get_fraction_numerator (ref GLib.Value v);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern int gst_value_get_fraction_denominator (ref GLib.Value v);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_fraction_get_type ();
}
public struct DoubleRange
{
public double Min;
public double Max;
public static GLib.GType GType {
get {
return new GType (gst_double_range_get_type ());
}
}
public DoubleRange (double min, double max)
{
if (min > max)
throw new ArgumentException ();
this.Min = min;
this.Max = max;
}
public DoubleRange (GLib.Value val) : this ()
{
this.Min = gst_value_get_double_range_min (ref val);
this.Max = gst_value_get_double_range_max (ref val);
}
public override string ToString ()
{
return String.Format ("[{0}, {1}]", Min, Max);
}
public void SetGValue (ref GLib.Value val)
{
gst_value_set_double_range (ref val, Min, Max);
}
public static explicit operator GLib.Value (DoubleRange range)
{
GLib.Value val = new GLib.Value (DoubleRange.GType);
gst_value_set_double_range (ref val, range.Min, range.Max);
return val;
}
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_double_range_get_type ();
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern void gst_value_set_double_range (ref GLib.Value v, double min, double max);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern double gst_value_get_double_range_min (ref GLib.Value v);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern double gst_value_get_double_range_max (ref GLib.Value v);
}
public struct IntRange
{
public int Min;
public int Max;
public static GLib.GType GType {
get {
return new GType (gst_int_range_get_type ());
}
}
public IntRange (int min, int max)
{
if (min > max)
throw new ArgumentException ();
this.Min = min;
this.Max = max;
}
public IntRange (GLib.Value val) : this ()
{
this.Min = gst_value_get_int_range_min (ref val);
this.Max = gst_value_get_int_range_max (ref val);
}
public void SetGValue (ref GLib.Value val)
{
gst_value_set_int_range (ref val, Min, Max);
}
public override string ToString ()
{
return String.Format ("[{0}, {1}]", Min, Max);
}
public static explicit operator GLib.Value (IntRange range)
{
GLib.Value val = new GLib.Value (IntRange.GType);
gst_value_set_int_range (ref val, range.Min, range.Max);
return val;
}
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_int_range_get_type ();
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern void gst_value_set_int_range (ref GLib.Value v, int min, int max);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern int gst_value_get_int_range_min (ref GLib.Value v);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern int gst_value_get_int_range_max (ref GLib.Value v);
}
public struct FractionRange
{
public Fraction Min;
public Fraction Max;
public static GLib.GType GType {
get {
return new GType (gst_fraction_range_get_type ());
}
}
public FractionRange (Fraction min, Fraction max)
{
double a = (double)min, b = (double)max;
if (a > b)
throw new ArgumentException ();
this.Min = min;
this.Max = max;
}
public FractionRange (GLib.Value val) : this ()
{
IntPtr min_ptr, max_ptr;
GLib.Value min, max;
min_ptr = gst_value_get_fraction_range_min (ref val);
max_ptr = gst_value_get_fraction_range_max (ref val);
min = (GLib.Value)Marshal.PtrToStructure (min_ptr, typeof(GLib.Value));
max = (GLib.Value)Marshal.PtrToStructure (max_ptr, typeof(GLib.Value));
this.Min = (Fraction)min.Val;
this.Max = (Fraction)max.Val;
}
public void SetGValue (ref GLib.Value val)
{
GLib.Value min = new GLib.Value (Min);
GLib.Value max = new GLib.Value (Max);
gst_value_set_fraction_range (ref val, ref min, ref max);
min.Dispose ();
max.Dispose ();
}
public override string ToString ()
{
return String.Format ("[{0}, {1}]", Min, Max);
}
public static explicit operator GLib.Value (FractionRange range)
{
GLib.Value val = new GLib.Value (FractionRange.GType);
GLib.Value min = new GLib.Value (range.Min);
GLib.Value max = new GLib.Value (range.Max);
gst_value_set_fraction_range (ref val, ref min, ref max);
min.Dispose ();
max.Dispose ();
return val;
}
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_fraction_range_get_type ();
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern void gst_value_set_fraction_range (ref GLib.Value v, ref GLib.Value min, ref GLib.Value max);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_get_fraction_range_min (ref GLib.Value v);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_get_fraction_range_max (ref GLib.Value v);
}
public class Date : IWrapper
{
public DateTime Val;
private IntPtr handle;
public IntPtr Handle {
get {
return handle;
}
}
public static GLib.GType GType {
get {
return new GType (gst_date_get_type ());
}
}
~Date ()
{
g_date_free (handle);
}
public Date (DateTime date)
{
this.Val = date;
handle = g_date_new_dmy ((byte)Val.Day, (int)Val.Month, (ushort)Val.Year);
}
public Date (int day, int month, int year)
{
this.Val = new DateTime (year, month, day);
handle = g_date_new_dmy ((byte)Val.Day, (int)Val.Month, (ushort)Val.Year);
}
public Date (GLib.Value val)
{
IntPtr date = gst_value_get_date (ref val);
this.Val = new DateTime (g_date_get_year (date), g_date_get_month (date), g_date_get_day (date));
handle = g_date_new_dmy ((byte)Val.Day, (int)Val.Month, (ushort)Val.Year);
}
public static Date New (IntPtr date)
{
return new Date (g_date_get_day (date), g_date_get_month (date), g_date_get_year (date));
}
public void SetGValue (ref GLib.Value val)
{
IntPtr date_ptr = g_date_new_dmy ((byte)Val.Day, (int)Val.Month, (ushort)Val.Year);
gst_value_set_date (ref val, date_ptr);
GLib.Marshaller.Free (date_ptr);
}
public override string ToString ()
{
return String.Format ("{0}-{1}-{2}", Val.Year, Val.Month, Val.Day);
}
public static explicit operator GLib.Value (Date date)
{
GLib.Value val = new GLib.Value (Date.GType);
date.SetGValue (ref val);
return val;
}
[DllImport ("libglib-2.0-0.dll") ]
private static extern byte g_date_get_day (IntPtr date);
[DllImport ("libglib-2.0-0.dll") ]
private static extern int g_date_get_month (IntPtr date);
[DllImport ("libglib-2.0-0.dll") ]
private static extern ushort g_date_get_year (IntPtr date);
[DllImport ("libglib-2.0-0.dll") ]
private static extern IntPtr g_date_new_dmy (byte day, int month, ushort year);
[DllImport ("libglib-2.0-0.dll") ]
private static extern void g_date_free (IntPtr date);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_date_get_type ();
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_get_date (ref GLib.Value val);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern void gst_value_set_date (ref GLib.Value val, IntPtr date);
}
public struct List : IEnumerable
{
private IList content;
public static GLib.GType GType {
get {
return new GType (gst_value_list_get_type ());
}
}
public List (IList content)
{
this.content = content;
}
public List (GLib.Value val)
{
this.content = new ArrayList ();
uint n = gst_value_list_get_size (ref val);
for (uint i = 0; i < n; i++) {
IntPtr v_ptr = gst_value_list_get_value (ref val, i);
GLib.Value v = (GLib.Value)Marshal.PtrToStructure (v_ptr, typeof(GLib.Value));
this.content.Add (v.Val);
}
}
public void SetGValue (ref GLib.Value val)
{
foreach (object o in content) {
GLib.Value v = new GLib.Value (o);
gst_value_list_append_value (ref val, ref v);
v.Dispose ();
}
}
public override string ToString ()
{
StringBuilder sb = new StringBuilder ();
sb.Append ("< ");
for (int i = 0; i < content.Count; i++) {
sb.Append (content [i]);
if (i < content.Count - 1)
sb.Append (", ");
}
sb.Append (" >");
return sb.ToString ();
}
public static explicit operator GLib.Value (List l)
{
GLib.Value val = new GLib.Value (List.GType);
foreach (object o in l.content) {
GLib.Value v = new GLib.Value (o);
gst_value_list_append_value (ref val, ref v);
v.Dispose ();
}
return val;
}
public IEnumerator GetEnumerator ()
{
return content.GetEnumerator ();
}
public object this [int index] {
set {
content [index] = value;
}
get {
return content [index];
}
}
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_list_get_type ();
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern uint gst_value_list_get_size (ref GLib.Value val);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_list_get_value (ref GLib.Value val, uint index);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern void gst_value_list_append_value (ref GLib.Value val, ref GLib.Value el);
}
public struct Array : IEnumerable
{
private IList content;
public static GLib.GType GType {
get {
return new GType (gst_value_array_get_type ());
}
}
public Array (IList content)
{
this.content = content;
}
public Array (GLib.Value val)
{
this.content = new ArrayList ();
uint n = gst_value_array_get_size (ref val);
for (uint i = 0; i < n; i++) {
IntPtr v_ptr = gst_value_array_get_value (ref val, i);
GLib.Value v = (GLib.Value)Marshal.PtrToStructure (v_ptr, typeof(GLib.Value));
this.content.Add (v.Val);
}
}
public void SetGValue (ref GLib.Value val)
{
foreach (object o in content) {
GLib.Value v = new GLib.Value (o);
gst_value_array_append_value (ref val, ref v);
v.Dispose ();
}
}
public static explicit operator GLib.Value (Array a)
{
GLib.Value val = new GLib.Value (Gst.Array.GType);
foreach (object o in a.content) {
GLib.Value v = new GLib.Value (o);
gst_value_array_append_value (ref val, ref v);
v.Dispose ();
}
return val;
}
public override string ToString ()
{
StringBuilder sb = new StringBuilder ();
sb.Append ("{ ");
for (int i = 0; i < content.Count; i++) {
sb.Append (content [i]);
if (i < content.Count - 1)
sb.Append (", ");
}
sb.Append (" }");
return sb.ToString ();
}
public IEnumerator GetEnumerator ()
{
return content.GetEnumerator ();
}
public object this [int index] {
set {
content [index] = value;
}
get {
return content [index];
}
}
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_array_get_type ();
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern uint gst_value_array_get_size (ref GLib.Value val);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_array_get_value (ref GLib.Value val, uint index);
[DllImport("libgstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern void gst_value_array_append_value (ref GLib.Value val, ref GLib.Value el);
}
}