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135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/*
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* Copyright (C) 2010 Ole André Vadla Ravnås <oravnas@cisco.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "coremediactx.h"
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#include <gst/gst.h>
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typedef struct _GstApiProvider GstApiProvider;
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typedef gpointer (*GstApiProviderObtainFunc) (GError ** error);
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struct _GstApiProvider
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{
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GstCoreMediaApi api;
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GstApiProviderObtainFunc obtain;
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guint offset;
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};
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#define API_PROVIDER(AN, a_n) \
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{ GST_API_##AN, (GstApiProviderObtainFunc) gst_##a_n##_api_obtain, \
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G_STRUCT_OFFSET (GstCoreMediaCtx, a_n) }
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static const GstApiProvider api_provider[] = {
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API_PROVIDER (CORE_VIDEO, cv),
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API_PROVIDER (CORE_MEDIA, cm),
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API_PROVIDER (VIDEO_TOOLBOX, vt),
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#ifdef HAVE_IOS
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API_PROVIDER (MEDIA_TOOLBOX, mt),
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API_PROVIDER (CELESTIAL, cel)
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#else
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API_PROVIDER (MIO, mio),
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#endif
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};
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G_DEFINE_TYPE (GstCoreMediaCtx, gst_core_media_ctx, G_TYPE_OBJECT);
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static void
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gst_core_media_ctx_init (GstCoreMediaCtx * self)
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{
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}
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static void
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gst_core_media_ctx_dispose (GObject * object)
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{
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GstCoreMediaCtx *self = GST_CORE_MEDIA_CTX_CAST (object);
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guint i;
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for (i = 0; i != G_N_ELEMENTS (api_provider); i++) {
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const GstApiProvider *ap = &api_provider[i];
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gpointer *api_ptr = (gpointer *) ((guint8 *) self + ap->offset);
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if (*api_ptr != NULL) {
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g_object_unref (*api_ptr);
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*api_ptr = NULL;
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}
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}
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G_OBJECT_CLASS (gst_core_media_ctx_parent_class)->dispose (object);
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}
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static void
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gst_core_media_ctx_class_init (GstCoreMediaCtxClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->dispose = gst_core_media_ctx_dispose;
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}
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GstCoreMediaCtx *
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gst_core_media_ctx_new (GstCoreMediaApi required_apis, GError ** error)
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{
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GstCoreMediaCtx *ctx;
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GArray *error_messages;
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guint i;
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ctx = g_object_new (GST_TYPE_CORE_MEDIA_CTX, NULL);
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error_messages = g_array_new (TRUE, FALSE, sizeof (gchar *));
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for (i = 0; i != G_N_ELEMENTS (api_provider); i++) {
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const GstApiProvider *ap = &api_provider[i];
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if ((required_apis & ap->api) != 0) {
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gpointer *api_ptr = (gpointer *) ((guint8 *) ctx + ap->offset);
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GError *tmp_error = NULL;
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*api_ptr = ap->obtain (&tmp_error);
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if (tmp_error != NULL) {
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gchar *message_copy = g_strdup (tmp_error->message);
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g_array_append_val (error_messages, message_copy);
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g_clear_error (&tmp_error);
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}
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}
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}
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if (error_messages->len != 0) {
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gchar *errors_joined;
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errors_joined = g_strjoinv ("\n\t* ", (gchar **) error_messages->data);
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g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED,
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"Could not obtain required API%s:%s%s",
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(error_messages->len == 1) ? "" : "s",
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(error_messages->len == 1) ? " " : "\n\t* ", errors_joined);
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g_free (errors_joined);
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g_object_unref (ctx);
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ctx = NULL;
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}
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for (i = 0; i != error_messages->len; i++)
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g_free (g_array_index (error_messages, gchar *, i));
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g_array_free (error_messages, TRUE);
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return ctx;
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}
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