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6f40edb7e1
Original commit message from CVS: * gst/gstelement.h: * gst/gstutils.c: (gst_element_populate_std_props), (gst_element_class_install_std_props): * gst/gstutils.h: Re-add gst_element_class_install_std_props, move to gstutils.h.
445 lines
18 KiB
C
445 lines
18 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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* 2004 Wim Taymans <wim@fluendo.com>
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*
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* gstelement.h: Header for GstElement
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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_ELEMENT_H__
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#define __GST_ELEMENT_H__
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#include <gst/gstconfig.h>
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#include <gst/gsttypes.h>
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#include <gst/gstobject.h>
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#include <gst/gstpad.h>
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#include <gst/gstclock.h>
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#include <gst/gstplugin.h>
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#include <gst/gstpluginfeature.h>
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#include <gst/gstindex.h>
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#include <gst/gstiterator.h>
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#include <gst/gstmessage.h>
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#include <gst/gsttag.h>
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G_BEGIN_DECLS typedef struct _GstElementDetails GstElementDetails;
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/* FIXME: need translatable stuff in here (how handle in registry)? */
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struct _GstElementDetails
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{
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/*< public > */
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gchar *longname; /* long, english name */
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gchar *klass; /* type of element, as hierarchy */
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gchar *description; /* insights of one form or another */
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gchar *author; /* who wrote this thing? */
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/*< private > */
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gpointer _gst_reserved[GST_PADDING];
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};
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#define GST_ELEMENT_DETAILS(longname,klass,description,author) \
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{ longname, klass, description, author, GST_PADDING_INIT }
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#define GST_IS_ELEMENT_DETAILS(details) ( \
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(details) && ((details)->longname != NULL) && ((details)->klass != NULL) \
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&& ((details)->description != NULL) && ((details)->author != NULL))
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#define GST_NUM_STATES 4
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/* NOTE: this probably should be done with an #ifdef to decide
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* whether to safe-cast or to just do the non-checking cast.
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*/
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#define GST_STATE(obj) (GST_ELEMENT(obj)->current_state)
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#define GST_STATE_PENDING(obj) (GST_ELEMENT(obj)->pending_state)
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#define GST_STATE_ERROR(obj) (GST_ELEMENT(obj)->state_error)
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/* Note: using 8 bit shift mostly "just because", it leaves us enough room to grow <g> */
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#define GST_STATE_TRANSITION(obj) ((GST_STATE(obj)<<8) | GST_STATE_PENDING(obj))
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#define GST_STATE_NULL_TO_READY ((GST_STATE_NULL<<8) | GST_STATE_READY)
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#define GST_STATE_READY_TO_PAUSED ((GST_STATE_READY<<8) | GST_STATE_PAUSED)
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#define GST_STATE_PAUSED_TO_PLAYING ((GST_STATE_PAUSED<<8) | GST_STATE_PLAYING)
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#define GST_STATE_PLAYING_TO_PAUSED ((GST_STATE_PLAYING<<8) | GST_STATE_PAUSED)
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#define GST_STATE_PAUSED_TO_READY ((GST_STATE_PAUSED<<8) | GST_STATE_READY)
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#define GST_STATE_READY_TO_NULL ((GST_STATE_READY<<8) | GST_STATE_NULL)
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GST_EXPORT GType _gst_element_type;
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#define GST_TYPE_ELEMENT (_gst_element_type)
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#define GST_IS_ELEMENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_ELEMENT))
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#define GST_IS_ELEMENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_ELEMENT))
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#define GST_ELEMENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_ELEMENT, GstElementClass))
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#define GST_ELEMENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_ELEMENT, GstElement))
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#define GST_ELEMENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_ELEMENT, GstElementClass))
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#define GST_ELEMENT_CAST(obj) ((GstElement*)(obj))
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/* convenience functions */
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#ifdef G_HAVE_ISO_VARARGS
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#define GST_ELEMENT_QUERY_TYPE_FUNCTION(functionname, ...) \
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GST_QUERY_TYPE_FUNCTION (GstElement*, functionname, __VA_ARGS__);
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#define GST_ELEMENT_FORMATS_FUNCTION(functionname, ...) \
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GST_FORMATS_FUNCTION (GstElement*, functionname, __VA_ARGS__);
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#define GST_ELEMENT_EVENT_MASK_FUNCTION(functionname, ...) \
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GST_EVENT_MASK_FUNCTION (GstElement*, functionname, __VA_ARGS__);
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#elif defined(G_HAVE_GNUC_VARARGS)
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#define GST_ELEMENT_QUERY_TYPE_FUNCTION(functionname, a...) \
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GST_QUERY_TYPE_FUNCTION (GstElement*, functionname, a);
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#define GST_ELEMENT_FORMATS_FUNCTION(functionname, a...) \
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GST_FORMATS_FUNCTION (GstElement*, functionname, a);
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#define GST_ELEMENT_EVENT_MASK_FUNCTION(functionname, a...) \
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GST_EVENT_MASK_FUNCTION (GstElement*, functionname, a);
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#endif
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typedef enum
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{
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/* private flags that can be used by the scheduler */
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GST_ELEMENT_SCHEDULER_PRIVATE1,
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GST_ELEMENT_SCHEDULER_PRIVATE2,
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/* ignore state changes from parent */
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GST_ELEMENT_LOCKED_STATE,
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/* use some padding for future expansion */
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GST_ELEMENT_FLAG_LAST = GST_OBJECT_FLAG_LAST + 16
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} GstElementFlags;
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#define GST_ELEMENT_NAME(obj) (GST_OBJECT_NAME(obj))
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#define GST_ELEMENT_PARENT(obj) (GST_ELEMENT_CAST(GST_OBJECT_PARENT(obj)))
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#define GST_ELEMENT_MANAGER(obj) (GST_ELEMENT_CAST(obj)->manager)
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#define GST_ELEMENT_BUS(obj) (GST_ELEMENT_CAST(obj)->bus)
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#define GST_ELEMENT_SCHEDULER(obj) (GST_ELEMENT_CAST(obj)->scheduler)
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#define GST_ELEMENT_CLOCK(obj) (GST_ELEMENT_CAST(obj)->clock)
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#define GST_ELEMENT_PADS(obj) (GST_ELEMENT_CAST(obj)->pads)
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/* log a (fatal) error message and post it on the bus */
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#define GST_ELEMENT_ERROR(el, domain, code, text, debug) \
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G_STMT_START { \
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gchar *__txt = _gst_element_error_printf text; \
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gchar *__dbg = _gst_element_error_printf debug; \
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if (__txt) \
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GST_ERROR_OBJECT (el, "%s", __txt); \
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if (__dbg) \
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GST_ERROR_OBJECT (el, "%s", __dbg); \
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gst_element_message_full (GST_ELEMENT(el), GST_MESSAGE_ERROR, \
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GST_ ## domain ## _ERROR, GST_ ## domain ## _ERROR_ ## code, \
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__txt, __dbg, __FILE__, GST_FUNCTION, __LINE__); \
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} G_STMT_END
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/* log a (non-fatal) warning message and post it on the bus */
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#define GST_ELEMENT_WARNING(el, domain, code, text, debug) \
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G_STMT_START { \
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gchar *__txt = _gst_element_error_printf text; \
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gchar *__dbg = _gst_element_error_printf debug; \
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if (__txt) \
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GST_WARNING_OBJECT (el, "%s", __txt); \
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if (__dbg) \
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GST_WARNING_OBJECT (el, "%s", __dbg); \
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gst_element_message_full (GST_ELEMENT(el), GST_MESSAGE_WARNING, \
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GST_ ## domain ## _ERROR, GST_ ## domain ## _ERROR_ ## code, \
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__txt, __dbg, __FILE__, GST_FUNCTION, __LINE__); \
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} G_STMT_END
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/* the state change mutexes and conds */
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#define GST_STATE_GET_LOCK(elem) (GST_ELEMENT_CAST(elem)->state_lock)
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#define GST_STATE_LOCK(elem) g_mutex_lock(GST_STATE_GET_LOCK(elem))
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#define GST_STATE_TRYLOCK(elem) g_mutex_trylock(GST_STATE_GET_LOCK(elem))
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#define GST_STATE_UNLOCK(elem) g_mutex_unlock(GST_STATE_GET_LOCK(elem))
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#define GST_STATE_GET_COND(elem) (GST_ELEMENT_CAST(elem)->state_cond)
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#define GST_STATE_WAIT(elem) g_cond_wait (GST_STATE_GET_COND (elem), GST_STATE_GET_LOCK (elem))
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#define GST_STATE_TIMED_WAIT(elem, timeval) g_cond_timed_wait (GST_STATE_GET_COND (elem), GST_STATE_GET_LOCK (elem),\
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timeval)
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#define GST_STATE_SIGNAL(elem) g_cond_signal (GST_STATE_GET_COND (elem));
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#define GST_STATE_BROADCAST(elem) g_cond_broadcast (GST_STATE_GET_COND (elem));
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typedef struct _GstElementFactory GstElementFactory;
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typedef struct _GstElementFactoryClass GstElementFactoryClass;
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struct _GstElement
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{
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GstObject object;
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/*< public > *//* with STATE_LOCK */
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/* element state */
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GMutex *state_lock;
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GCond *state_cond;
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guint8 current_state;
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guint8 pending_state;
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gboolean state_error; /* flag is set when the element has an error in the last state
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change. it is cleared when doing another state change. */
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/*< public > *//* with LOCK */
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/* element manager */
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GstPipeline *manager;
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GstBus *bus;
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GstScheduler *scheduler;
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/* private pointer for the scheduler */
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gpointer sched_private;
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/* allocated clock */
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GstClock *clock;
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GstClockTimeDiff base_time; /* NULL/READY: 0 - PAUSED: current time - PLAYING: difference to clock */
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/* element pads, these lists can only be iterated while holding
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* the LOCK or checking the cookie after each LOCK. */
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guint16 numpads;
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GList *pads;
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guint16 numsrcpads;
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GList *srcpads;
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guint16 numsinkpads;
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GList *sinkpads;
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guint32 pads_cookie;
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/*< private > */
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstElementClass
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{
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GstObjectClass parent_class;
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/*< public > */
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/* the element details */
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GstElementDetails details;
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/* factory that the element was created from */
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GstElementFactory *elementfactory;
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/* templates for our pads */
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GList *padtemplates;
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gint numpadtemplates;
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guint32 pad_templ_cookie;
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/* signal callbacks */
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void (*state_change) (GstElement * element, GstElementState old,
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GstElementState state);
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void (*new_pad) (GstElement * element, GstPad * pad);
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void (*pad_removed) (GstElement * element, GstPad * pad);
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void (*no_more_pads) (GstElement * element);
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/*< protected > */
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/* vtable */
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/* request/release pads */
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GstPad *(*request_new_pad) (GstElement * element, GstPadTemplate * templ,
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const gchar * name);
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void (*release_pad) (GstElement * element, GstPad * pad);
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/* state changes */
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GstElementStateReturn (*get_state) (GstElement * element, GstElementState * state,
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GstElementState * pending, GTimeVal * timeout);
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GstElementStateReturn (*change_state) (GstElement * element);
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/* manager */
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void (*set_manager) (GstElement * element, GstPipeline * pipeline);
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void (*set_bus) (GstElement * element, GstBus * bus);
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void (*set_scheduler) (GstElement * element, GstScheduler * scheduler);
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/* set/get clocks */
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GstClock *(*get_clock) (GstElement * element);
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void (*set_clock) (GstElement * element, GstClock * clock);
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/* index */
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GstIndex *(*get_index) (GstElement * element);
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void (*set_index) (GstElement * element, GstIndex * index);
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/* query/convert/events functions */
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const GstEventMask *(*get_event_masks) (GstElement * element);
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gboolean (*send_event) (GstElement * element, GstEvent * event);
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const GstFormat *(*get_formats) (GstElement * element);
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gboolean (*convert) (GstElement * element,
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GstFormat src_format, gint64 src_value,
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GstFormat * dest_format, gint64 * dest_value);
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const GstQueryType *(*get_query_types) (GstElement * element);
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gboolean (*query) (GstElement * element, GstQueryType type,
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GstFormat * format, gint64 * value);
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/*< private > */
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gpointer _gst_reserved[GST_PADDING - 1];
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};
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/* class stuff */
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void gst_element_class_add_pad_template (GstElementClass * klass,
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GstPadTemplate * templ);
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void gst_element_class_set_details (GstElementClass * klass,
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const GstElementDetails * details);
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GstPadTemplate *gst_element_class_get_pad_template (GstElementClass *
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element_class, const gchar * name);
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GList *gst_element_class_get_pad_template_list (GstElementClass *
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element_class);
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/* element instance */
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GType gst_element_get_type (void);
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#define gst_element_get_name(elem) gst_object_get_name(GST_OBJECT(elem))
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#define gst_element_set_name(elem,name) gst_object_set_name(GST_OBJECT(elem),name)
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#define gst_element_get_parent(elem) gst_object_get_parent(GST_OBJECT(elem))
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#define gst_element_set_parent(elem,parent) gst_object_set_parent(GST_OBJECT(elem),parent)
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/* clocking */
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gboolean gst_element_requires_clock (GstElement * element);
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gboolean gst_element_provides_clock (GstElement * element);
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GstClock *gst_element_get_clock (GstElement * element);
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void gst_element_set_clock (GstElement * element, GstClock * clock);
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GstClockReturn gst_element_clock_wait (GstElement * element,
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GstClockID id, GstClockTimeDiff * jitter);
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GstClockTime gst_element_get_time (GstElement * element);
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gboolean gst_element_wait (GstElement * element, GstClockTime timestamp);
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/* indexes */
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gboolean gst_element_is_indexable (GstElement * element);
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void gst_element_set_index (GstElement * element, GstIndex * index);
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GstIndex *gst_element_get_index (GstElement * element);
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/* manager and tasks */
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void gst_element_set_manager (GstElement * element, GstPipeline * pipeline);
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GstPipeline *gst_element_get_manager (GstElement * element);
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void gst_element_set_bus (GstElement * element, GstBus * bus);
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GstBus *gst_element_get_bus (GstElement * element);
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void gst_element_set_scheduler (GstElement * element, GstScheduler * scheduler);
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GstScheduler *gst_element_get_scheduler (GstElement * element);
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/* pad management */
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gboolean gst_element_add_pad (GstElement * element, GstPad * pad);
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gboolean gst_element_remove_pad (GstElement * element, GstPad * pad);
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GstPad *gst_element_add_ghost_pad (GstElement * element, GstPad * pad,
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const gchar * name);
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void gst_element_no_more_pads (GstElement * element);
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GstPad *gst_element_get_pad (GstElement * element, const gchar * name);
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GstPad *gst_element_get_static_pad (GstElement * element, const gchar * name);
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GstPad *gst_element_get_request_pad (GstElement * element, const gchar * name);
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void gst_element_release_request_pad (GstElement * element, GstPad * pad);
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GstIterator *gst_element_iterate_pads (GstElement * element);
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/* event/query/format stuff */
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G_CONST_RETURN GstEventMask *gst_element_get_event_masks (GstElement * element);
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gboolean gst_element_send_event (GstElement * element, GstEvent * event);
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gboolean gst_element_seek (GstElement * element, GstSeekType seek_type,
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guint64 offset);
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G_CONST_RETURN GstQueryType *gst_element_get_query_types (GstElement * element);
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gboolean gst_element_query (GstElement * element, GstQueryType type,
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GstFormat * format, gint64 * value);
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G_CONST_RETURN GstFormat *gst_element_get_formats (GstElement * element);
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gboolean gst_element_convert (GstElement * element,
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GstFormat src_format, gint64 src_value,
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GstFormat * dest_format, gint64 * dest_value);
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/* messages */
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gboolean gst_element_post_message (GstElement * element, GstMessage * message);
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/* error handling */
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gchar *_gst_element_error_printf (const gchar * format, ...);
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void gst_element_message_full (GstElement * element, GstMessageType type,
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GQuark domain, gint code, gchar * text, gchar * debug, const gchar * file,
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const gchar * function, gint line);
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/* state management */
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gboolean gst_element_is_locked_state (GstElement * element);
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gboolean gst_element_set_locked_state (GstElement * element,
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gboolean locked_state);
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gboolean gst_element_sync_state_with_parent (GstElement * element);
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GstElementStateReturn gst_element_get_state (GstElement * element,
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GstElementState * state,
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GstElementState * pending,
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GTimeVal * timeout);
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GstElementStateReturn gst_element_set_state (GstElement * element,
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GstElementState state);
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void gst_element_abort_state (GstElement * element);
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void gst_element_commit_state (GstElement * element);
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/* factory management */
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GstElementFactory *gst_element_get_factory (GstElement * element);
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/*
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*
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* factories stuff
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*
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**/
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#define GST_TYPE_ELEMENT_FACTORY (gst_element_factory_get_type())
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#define GST_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ELEMENT_FACTORY,\
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GstElementFactory))
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#define GST_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ELEMENT_FACTORY,\
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GstElementFactoryClass))
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#define GST_IS_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ELEMENT_FACTORY))
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#define GST_IS_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ELEMENT_FACTORY))
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struct _GstElementFactory
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{
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GstPluginFeature parent;
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GType type; /* unique GType of element or 0 if not loaded */
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GstElementDetails details;
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GList *padtemplates;
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guint numpadtemplates;
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/* URI interface stuff */
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guint uri_type;
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gchar **uri_protocols;
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GList *interfaces; /* interfaces this element implements */
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|
|
|
gpointer _gst_reserved[GST_PADDING];
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|
};
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|
|
|
struct _GstElementFactoryClass
|
|
{
|
|
GstPluginFeatureClass parent_class;
|
|
|
|
gpointer _gst_reserved[GST_PADDING];
|
|
};
|
|
|
|
GType gst_element_factory_get_type (void);
|
|
|
|
gboolean gst_element_register (GstPlugin * plugin,
|
|
const gchar * name, guint rank, GType type);
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|
|
|
GstElementFactory *gst_element_factory_find (const gchar * name);
|
|
GType gst_element_factory_get_element_type (GstElementFactory * factory);
|
|
G_CONST_RETURN gchar *gst_element_factory_get_longname (GstElementFactory *
|
|
factory);
|
|
G_CONST_RETURN gchar *gst_element_factory_get_klass (GstElementFactory *
|
|
factory);
|
|
G_CONST_RETURN gchar *gst_element_factory_get_description (GstElementFactory *
|
|
factory);
|
|
G_CONST_RETURN gchar *gst_element_factory_get_author (GstElementFactory *
|
|
factory);
|
|
guint gst_element_factory_get_num_pad_templates (GstElementFactory * factory);
|
|
G_CONST_RETURN GList *gst_element_factory_get_pad_templates (GstElementFactory *
|
|
factory);
|
|
guint gst_element_factory_get_uri_type (GstElementFactory * factory);
|
|
gchar **gst_element_factory_get_uri_protocols (GstElementFactory * factory);
|
|
|
|
GstElement *gst_element_factory_create (GstElementFactory * factory,
|
|
const gchar * name);
|
|
GstElement *gst_element_factory_make (const gchar * factoryname,
|
|
const gchar * name);
|
|
|
|
void __gst_element_factory_add_pad_template (GstElementFactory *elementfactory,
|
|
GstPadTemplate *templ);
|
|
void __gst_element_factory_add_interface (GstElementFactory *elementfactory,
|
|
const gchar *interfacename);
|
|
|
|
G_END_DECLS
|
|
#endif /* __GST_ELEMENT_H__ */
|