mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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97bb1edf6c
Public frameworks don't need to build the API dynamically, we instead use the framework directly. The exception is for VideoToolbox which went public in the 10.8 SDK, but it's still private in older version of the SDK and iOS. This allow building the plugin against SDK's where it's not a public framework.
127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/*
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* Copyright (C) 2010 Ole André Vadla Ravnås <oleavr@soundrop.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 (VIDEO_TOOLBOX, vt),
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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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