gstreamer/gst/gstmessage.h

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/* GStreamer
* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
*
* gstmessage.h: Header for GstMessage subsystem
*
* 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.
*/
#ifndef __GST_MESSAGE_H__
#define __GST_MESSAGE_H__
#include <gst/gsttypes.h>
#include <gst/gstdata.h>
#include <gst/gstobject.h>
#include <gst/gsttag.h>
#include <gst/gststructure.h>
G_BEGIN_DECLS GST_EXPORT GType _gst_message_type;
typedef enum
{
GST_MESSAGE_UNKNOWN = 0,
GST_MESSAGE_EOS = 1,
GST_MESSAGE_ERROR = 2,
GST_MESSAGE_WARNING = 3,
GST_MESSAGE_INFO = 4,
GST_MESSAGE_TAG = 5,
GST_MESSAGE_BUFFERING = 6,
GST_MESSAGE_STATE_CHANGED = 7,
GST_MESSAGE_STEP_DONE = 8,
} GstMessageType;
#define GST_MESSAGE_TRACE_NAME "GstMessage"
#define GST_TYPE_MESSAGE (_gst_message_type)
#define GST_MESSAGE(message) ((GstMessage*)(message))
#define GST_IS_MESSAGE(message) (GST_DATA_TYPE(message) == GST_TYPE_MESSAGE)
#define GST_MESSAGE_GET_LOCK(message) (GST_MESSAGE(message)->lock)
#define GST_MESSAGE_LOCK(message) g_mutex_lock(GST_MESSAGE_GET_LOCK(message))
#define GST_MESSAGE_UNLOCK(message) g_mutex_unlock(GST_MESSAGE_GET_LOCK(message))
#define GST_MESSAGE_COND(message) (GST_MESSAGE(message)->cond)
#define GST_MESSAGE_WAIT(message) g_cond_wait(GST_MESSAGE_COND(message),GST_MESSAGE_GET_LOCK(message))
#define GST_MESSAGE_SIGNAL(message) g_cond_signal(GST_MESSAGE_COND(message))
#define GST_MESSAGE_TYPE(message) (GST_MESSAGE(message)->type)
#define GST_MESSAGE_TIMESTAMP(message) (GST_MESSAGE(message)->timestamp)
#define GST_MESSAGE_SRC(message) (GST_MESSAGE(message)->src)
#define GST_MESSAGE_TAG_LIST(message) (GST_MESSAGE(message)->message_data.tag.list)
#define GST_MESSAGE_ERROR_GERROR(message) (GST_MESSAGE(message)->message_data.error.gerror)
#define GST_MESSAGE_ERROR_DEBUG(message) (GST_MESSAGE(message)->message_data.error.debug)
#define GST_MESSAGE_WARNING_GERROR(message) (GST_MESSAGE(message)->message_data.error.gerror)
#define GST_MESSAGE_WARNING_DEBUG(message) (GST_MESSAGE(message)->message_data.error.debug)
struct _GstMessage
{
GstData data;
/*< public > *//* with MESSAGE_LOCK */
GMutex *lock; /* lock and cond for async delivery */
GCond *cond;
/*< public > *//* with COW */
GstMessageType type;
guint64 timestamp;
GstObject *src;
union
{
struct
{
GError *gerror;
gchar *debug;
} error;
struct
{
GstStructure *structure;
} structure;
struct
{
GstTagList *list;
} tag;
} message_data;
/*< private > */
gpointer _gst_reserved[GST_PADDING];
};
void _gst_message_initialize (void);
GType gst_message_get_type (void);
GstMessage * gst_message_new (GstMessageType type, GstObject * src);
/* refcounting */
#define gst_message_ref(ev) GST_MESSAGE (gst_data_ref (GST_DATA (ev)))
#define gst_message_ref_by_count(ev,c) GST_MESSAGE (gst_data_ref_by_count (GST_DATA (ev), c))
#define gst_message_unref(ev) gst_data_unref (GST_DATA (ev))
/* copy message */
#define gst_message_copy(ev) GST_MESSAGE (gst_data_copy (GST_DATA (ev)))
GstMessage * gst_message_new_eos (GstObject * src);
GstMessage * gst_message_new_error (GstObject * src, GError * error, gchar * debug);
GstMessage * gst_message_new_warning (GstObject * src, GError * error, gchar * debug);
GstMessage * gst_message_new_tag (GstObject * src, GstTagList * tag_list);
G_END_DECLS
#endif /* __GST_MESSAGE_H__ */