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/*
* Copyright (C) 2010 Ole André Vadla Ravnås <oravnas@cisco.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "coremediactx.h"
#include <gst/gst.h>
typedef struct _GstApiProvider GstApiProvider;
typedef gpointer (*GstApiProviderObtainFunc) (GError ** error);
struct _GstApiProvider
{
GstCoreMediaApi api;
GstApiProviderObtainFunc obtain;
guint offset;
};
#define API_PROVIDER(AN, a_n) \
{ GST_API_##AN, (GstApiProviderObtainFunc) gst_##a_n##_api_obtain, \
G_STRUCT_OFFSET (GstCoreMediaCtx, a_n) }
static const GstApiProvider api_provider[] = {
API_PROVIDER (CORE_VIDEO, cv),
API_PROVIDER (CORE_MEDIA, cm),
API_PROVIDER (VIDEO_TOOLBOX, vt),
#ifdef HAVE_IOS
API_PROVIDER (MEDIA_TOOLBOX, mt),
API_PROVIDER (CELESTIAL, cel)
#else
API_PROVIDER (MIO, mio),
#endif
};
G_DEFINE_TYPE (GstCoreMediaCtx, gst_core_media_ctx, G_TYPE_OBJECT);
static void
gst_core_media_ctx_init (GstCoreMediaCtx * self)
{
}
static void
gst_core_media_ctx_dispose (GObject * object)
{
GstCoreMediaCtx *self = GST_CORE_MEDIA_CTX_CAST (object);
guint i;
for (i = 0; i != G_N_ELEMENTS (api_provider); i++) {
const GstApiProvider *ap = &api_provider[i];
gpointer *api_ptr = (gpointer *) ((guint8 *) self + ap->offset);
if (*api_ptr != NULL) {
g_object_unref (*api_ptr);
*api_ptr = NULL;
}
}
G_OBJECT_CLASS (gst_core_media_ctx_parent_class)->dispose (object);
}
static void
gst_core_media_ctx_class_init (GstCoreMediaCtxClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->dispose = gst_core_media_ctx_dispose;
}
GstCoreMediaCtx *
gst_core_media_ctx_new (GstCoreMediaApi required_apis, GError ** error)
{
GstCoreMediaCtx *ctx;
GArray *error_messages;
guint i;
ctx = g_object_new (GST_TYPE_CORE_MEDIA_CTX, NULL);
error_messages = g_array_new (TRUE, FALSE, sizeof (gchar *));
for (i = 0; i != G_N_ELEMENTS (api_provider); i++) {
const GstApiProvider *ap = &api_provider[i];
if ((required_apis & ap->api) != 0) {
gpointer *api_ptr = (gpointer *) ((guint8 *) ctx + ap->offset);
GError *tmp_error = NULL;
*api_ptr = ap->obtain (&tmp_error);
if (tmp_error != NULL) {
gchar *message_copy = g_strdup (tmp_error->message);
g_array_append_val (error_messages, message_copy);
g_clear_error (&tmp_error);
}
}
}
if (error_messages->len != 0) {
gchar *errors_joined;
errors_joined = g_strjoinv ("\n\t* ", (gchar **) error_messages->data);
g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED,
"Could not obtain required API%s:%s%s",
(error_messages->len == 1) ? "" : "s",
(error_messages->len == 1) ? " " : "\n\t* ", errors_joined);
g_free (errors_joined);
g_object_unref (ctx);
ctx = NULL;
}
for (i = 0; i != error_messages->len; i++)
g_free (g_array_index (error_messages, gchar *, i));
g_array_free (error_messages, TRUE);
return ctx;
}
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