gstreamer/subprojects/gstreamer-sharp/sources/custom/Value.cs

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

597 lines
16 KiB
C#
Raw Normal View History

// 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 GLib;
using System;
using System.Collections;
using System.Runtime.InteropServices;
using System.Text;
/* 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("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern void gst_value_set_fraction(ref GLib.Value v, int numerator, int denominator);
[DllImport("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern int gst_value_get_fraction_numerator(ref GLib.Value v);
[DllImport("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern int gst_value_get_fraction_denominator(ref GLib.Value v);
[DllImport("gstreamer-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("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_double_range_get_type();
[DllImport("gstreamer-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("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern double gst_value_get_double_range_min(ref GLib.Value v);
[DllImport("gstreamer-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("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_int_range_get_type();
[DllImport("gstreamer-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("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern int gst_value_get_int_range_min(ref GLib.Value v);
[DllImport("gstreamer-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("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_fraction_range_get_type();
[DllImport("gstreamer-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("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_get_fraction_range_min(ref GLib.Value v);
[DllImport("gstreamer-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("glib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern byte g_date_get_day(IntPtr date);
[DllImport("glib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern int g_date_get_month(IntPtr date);
[DllImport("glib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern ushort g_date_get_year(IntPtr date);
[DllImport("glib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr g_date_new_dmy(byte day, int month, ushort year);
[DllImport("glib-2.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern void g_date_free(IntPtr date);
[DllImport("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_date_get_type();
[DllImport("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_get_date(ref GLib.Value val);
[DllImport("gstreamer-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("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_list_get_type();
[DllImport("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern uint gst_value_list_get_size(ref GLib.Value val);
[DllImport("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_list_get_value(ref GLib.Value val, uint index);
[DllImport("gstreamer-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("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_array_get_type();
[DllImport("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern uint gst_value_array_get_size(ref GLib.Value val);
[DllImport("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr gst_value_array_get_value(ref GLib.Value val, uint index);
[DllImport("gstreamer-1.0-0.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern void gst_value_array_append_value(ref GLib.Value val, ref GLib.Value el);
}
}