/* -*- c-file-style: "ruby"; indent-tabs-mode: nil -*- */
/*
 *  Copyright (C) 2011  Ruby-GNOME2 Project Team
 *  Copyright (C) 2003, 2004 Laurent Sansonetti <lrz@gnome.org>
 *
 *  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
 */

#include "rbgst-private.h"

#define RG_TARGET_NAMESPACE cFormat

/* Class: Gst::Format
 * Dynamically register new formats. 
 */

static GstFormat *
format_copy (const GstFormat* format)
{
    GstFormat *new_format;
    g_return_val_if_fail (format != NULL, NULL);
    new_format = g_new (GstFormat, sizeof (GstFormat));
    *new_format = *format;
    return new_format;
}

GType
gst_format_get_type2 (void)
{
    static GType our_type = 0;
    if (our_type == 0)
        our_type = g_boxed_type_register_static ("GstFormatClass",
            (GBoxedCopyFunc)format_copy,
            (GBoxedFreeFunc)g_free);
    return our_type;
}

/*
 * Class method: find(nick)
 * nick: the nick of an existing format.
 *
 * Returns: a reference to the Gst::Format object registered with the
 * given nick, or nil if this query was not registered.
 */
static VALUE
rg_s_find (G_GNUC_UNUSED VALUE self, VALUE nick)
{
    GstFormat format = gst_format_get_by_nick (RVAL2CSTR (nick));
    return format != GST_FORMAT_UNDEFINED
        ? RGST_FORMAT_NEW (&format)
        : Qnil;
}

/*
 * Class method: each { |format| ... }
 *
 * Calls the block for each registered format, passing a reference
 * to the Gst::Format object as parameter.
 *
 * Returns: always nil.
 */
static VALUE
rg_s_each (G_GNUC_UNUSED VALUE self)
{
    GstIterator *iter;
    gpointer value;

    iter = gst_format_iterate_definitions();
    while (gst_iterator_next(iter, &value) == GST_ITERATOR_OK) {
        GstFormatDefinition *def = (GstFormatDefinition *)value;
        rb_yield(RGST_FORMAT_NEW(&(def->value)));
    }
    gst_iterator_free(iter);
    return Qnil;
}

/* Method: type_id
 * Returns: the type id of this format (see Gst::Format::Type).
 */
static VALUE
rg_type_id (VALUE self)
{
    GstFormat *format = RGST_FORMAT (self);
    return GENUM2RVAL (*format, GST_TYPE_FORMAT);
}

/* Method: nick
 * Returns: the short nick of the format.
 */
static VALUE
rg_nick (VALUE self)
{
    GstFormat *format = RGST_FORMAT (self);
    return CSTR2RVAL (gst_format_get_details (*format)->nick);
}

/* Method: description
 * Returns: a longer description of the format.
 */
static VALUE
rg_description (VALUE self)
{
    GstFormat *format = RGST_FORMAT (self);
    return CSTR2RVAL (gst_format_get_details (*format)->description);
}

/*
 * Method: ==(format)
 * format: a Gst::Format.
 *
 * Checks if two Gst::Format objects are registered under the
 * same nick.
 *
 * Returns: true on success, false on failure.
 */
static VALUE
rg_operator_is_equal (VALUE self, VALUE other_format)
{
    GstFormat *f1, *f2;
    const gchar *n1, *n2;

    if (NIL_P (other_format))
        return Qfalse;

    f1 = RGST_FORMAT (self);
    f2 = RGST_FORMAT (other_format);

    n1 = gst_format_get_details (*f1)->nick;
    n2 = gst_format_get_details (*f2)->nick;

    return CBOOL2RVAL (strcmp (n1, n2) == 0);
}

void
Init_gst_format (VALUE mGst)
{
    VALUE RG_TARGET_NAMESPACE = G_DEF_CLASS (GST_TYPE_FORMAT2, "Format", mGst);

    RG_DEF_SMETHOD(each, 0);
    RG_DEF_SMETHOD(find, 1);

    RG_DEF_METHOD(type_id, 0);
    RG_DEF_METHOD(nick, 0);
    RG_DEF_METHOD(description, 0);
    RG_DEF_METHOD_OPERATOR("==", is_equal, 1);

    G_DEF_CLASS (GST_TYPE_FORMAT, "Type", RG_TARGET_NAMESPACE);
    G_DEF_CONSTANTS (RG_TARGET_NAMESPACE, GST_TYPE_FORMAT, "GST_FORMAT_");
}