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c2f41a8906
Original commit message from CVS: Next big merge. Added GstBus for mainloop integration. Added GstMessage for sending notifications on the bus. Added GstTask as an abstraction for pipeline entry points. Removed GstThread. Removed Schedulers. Simplified GstQueue for multithreaded core. Made _link threadsafe, removed old capsnego. Added STREAM_LOCK and PREROLL_LOCK in GstPad. Added pad blocking functions. Reworked scheduling functions in GstPad to prepare for scheduling updates soon. Moved events out of data stream. Simplified GstEvent types. Added return values to push/pull. Removed clocking from GstElement. Added prototypes for state change function for next merge. Removed iterate from bins and state change management. Fixed some elements, disabled others for now. Fixed -inspect and -launch. Added check for GstBus.
142 lines
5.6 KiB
C
142 lines
5.6 KiB
C
/* GStreamer
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* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
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*
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* gstmessage.h: Header for GstMessage subsystem
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_MESSAGE_H__
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#define __GST_MESSAGE_H__
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#include <gst/gsttypes.h>
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#include <gst/gstdata.h>
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#include <gst/gstobject.h>
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#include <gst/gsttag.h>
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#include <gst/gststructure.h>
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G_BEGIN_DECLS
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GST_EXPORT GType _gst_message_type;
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/**
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* GstMessageType:
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* @GST_MESSAGE_UNKNOWN: an undefined message
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* @GST_MESSAGE_EOS: end-of-stream reached in a pipeline
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* @GST_MESSAGE_ERROR: an error occured
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* @GST_MESSAGE_WARNING: a warning occured.
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* @GST_MESSAGE_INFO: an info message occured
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* @GST_MESSAGE_TAG: a tag was found.
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* @GST_MESSAGE_BUFFERING: the pipeline is buffering
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* @GST_MESSAGE_STATE_CHANGED: a state change happened
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* @GST_MESSAGE_STEP_DONE: a framestep finished.
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* @GST_MESSAGE_NEW_CLOCK: a new clock was selected in the pipeline
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* @GST_MESSAGE_STRUCTURE_CHANGE: the structure of the pipeline changed.
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* @GST_MESSAGE_STREAM_STATUS: status about a stream, emited when it starts,
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* stops, errors, etc..
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* @GST_MESSAGE_APPLICATION: message posted by the application, possibly
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* via an application-specific element.
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* @GST_MESSAGE_ANY: mask for all of the above messages.
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*/
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typedef enum
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{
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GST_MESSAGE_UNKNOWN = 0,
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GST_MESSAGE_EOS = (1 << 0),
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GST_MESSAGE_ERROR = (1 << 1),
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GST_MESSAGE_WARNING = (1 << 2),
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GST_MESSAGE_INFO = (1 << 3),
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GST_MESSAGE_TAG = (1 << 4),
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GST_MESSAGE_BUFFERING = (1 << 5),
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GST_MESSAGE_STATE_CHANGED = (1 << 6),
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GST_MESSAGE_STEP_DONE = (1 << 7),
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GST_MESSAGE_NEW_CLOCK = (1 << 8),
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GST_MESSAGE_STRUCTURE_CHANGE = (1 << 9),
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GST_MESSAGE_STREAM_STATUS = (1 << 10),
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GST_MESSAGE_APPLICATION = (1 << 11),
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GST_MESSAGE_ANY = 0xffffffff
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} GstMessageType;
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#define GST_MESSAGE_TRACE_NAME "GstMessage"
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#define GST_TYPE_MESSAGE (_gst_message_type)
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#define GST_MESSAGE(message) ((GstMessage*)(message))
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#define GST_IS_MESSAGE(message) (GST_DATA_TYPE(message) == GST_TYPE_MESSAGE)
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/* the lock is used to handle the synchronous handling of messages,
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* the emiting thread is block until the handling thread processed
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* the message using this mutex/cond pair */
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#define GST_MESSAGE_GET_LOCK(message) (GST_MESSAGE(message)->lock)
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#define GST_MESSAGE_LOCK(message) g_mutex_lock(GST_MESSAGE_GET_LOCK(message))
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#define GST_MESSAGE_UNLOCK(message) g_mutex_unlock(GST_MESSAGE_GET_LOCK(message))
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#define GST_MESSAGE_COND(message) (GST_MESSAGE(message)->cond)
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#define GST_MESSAGE_WAIT(message) g_cond_wait(GST_MESSAGE_COND(message),GST_MESSAGE_GET_LOCK(message))
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#define GST_MESSAGE_SIGNAL(message) g_cond_signal(GST_MESSAGE_COND(message))
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#define GST_MESSAGE_TYPE(message) (GST_MESSAGE(message)->type)
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#define GST_MESSAGE_TIMESTAMP(message) (GST_MESSAGE(message)->timestamp)
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#define GST_MESSAGE_SRC(message) (GST_MESSAGE(message)->src)
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struct _GstMessage
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{
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GstData data;
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/*< public > *//* with MESSAGE_LOCK */
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GMutex *lock; /* lock and cond for async delivery */
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GCond *cond;
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/*< public > *//* with COW */
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GstMessageType type;
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guint64 timestamp;
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GstObject *src;
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GstStructure *structure;
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/*< private > */
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gpointer _gst_reserved[GST_PADDING];
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};
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void _gst_message_initialize (void);
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GType gst_message_get_type (void);
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GstMessage * gst_message_new (GstMessageType type, GstObject * src);
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/* refcounting */
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#define gst_message_ref(ev) GST_MESSAGE (gst_data_ref (GST_DATA (ev)))
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#define gst_message_ref_by_count(ev,c) GST_MESSAGE (gst_data_ref_by_count (GST_DATA (ev), c))
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#define gst_message_unref(ev) gst_data_unref (GST_DATA (ev))
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/* copy message */
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#define gst_message_copy(ev) GST_MESSAGE (gst_data_copy (GST_DATA (ev)))
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GstMessage * gst_message_new_eos (GstObject * src);
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GstMessage * gst_message_new_error (GstObject * src, GError * error, gchar * debug);
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GstMessage * gst_message_new_warning (GstObject * src, GError * error, gchar * debug);
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GstMessage * gst_message_new_tag (GstObject * src, GstTagList * tag_list);
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GstMessage * gst_message_new_state_changed (GstObject * src, GstElementState old_state,
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GstElementState new_state);
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GstMessage * gst_message_new_application (GstStructure *structure);
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const GstStructure * gst_message_get_structure (GstMessage *message);
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void gst_message_parse_tag (GstMessage *message, GstTagList **tag_list);
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void gst_message_parse_state_changed (GstMessage *message, GstElementState *old_state,
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GstElementState *new_state);
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void gst_message_parse_error (GstMessage *message, GError **gerror, gchar **debug);
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void gst_message_parse_warning (GstMessage *message, GError **gerror, gchar **debug);
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G_END_DECLS
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#endif /* __GST_MESSAGE_H__ */
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