mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-11 11:51:34 +00:00
41aa51ba45
Original commit message from CVS: Fixes for the new scheduler. Autoplug works again with mp3/mpeg1/ogg
248 lines
8.3 KiB
C
248 lines
8.3 KiB
C
/* Gnome-Streamer
|
|
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
|
|
*
|
|
* 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_ELEMENT_H__
|
|
#define __GST_ELEMENT_H__
|
|
|
|
|
|
#include <gnome-xml/parser.h>
|
|
#include <gst/gstlog.h>
|
|
#include <gst/gstobject.h>
|
|
#include <gst/gstpad.h>
|
|
#include <gst/cothreads.h>
|
|
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif /* __cplusplus */
|
|
|
|
|
|
typedef enum {
|
|
GST_STATE_NONE_PENDING = -1,
|
|
GST_STATE_NULL = 0,
|
|
GST_STATE_READY = 1,
|
|
GST_STATE_PLAYING = 2,
|
|
GST_STATE_PAUSED = 3,
|
|
} GstElementState;
|
|
|
|
typedef enum {
|
|
GST_STATE_FAILURE = 0,
|
|
GST_STATE_SUCCESS = 1,
|
|
GST_STATE_ASYNC = 2,
|
|
} GstElementStateReturn;
|
|
|
|
static inline char *_gst_print_statename(int state) {
|
|
switch (state) {
|
|
case -1: return "none pending";break;
|
|
case 0: return "null";break;
|
|
case 1: return "ready";break;
|
|
case 2: return "playing";break;
|
|
case 3: return "paused";break;
|
|
default: return "";
|
|
}
|
|
return "";
|
|
}
|
|
|
|
#define GST_STATE(obj) (GST_ELEMENT(obj)->current_state)
|
|
#define GST_STATE_PENDING(obj) (GST_ELEMENT(obj)->pending_state)
|
|
|
|
#define GST_STATE_TRANSITION(obj) ((GST_STATE(obj)<<4) | GST_STATE_PENDING(obj))
|
|
#define GST_STATE_NULL_TO_READY ((GST_STATE_NULL<<4) | GST_STATE_READY)
|
|
#define GST_STATE_READY_TO_PLAYING ((GST_STATE_READY<<4) | GST_STATE_PLAYING)
|
|
#define GST_STATE_PLAYING_TO_PAUSED ((GST_STATE_PLAYING<<4) | GST_STATE_PAUSED)
|
|
#define GST_STATE_PAUSED_TO_PLAYING ((GST_STATE_PAUSED<<4) | GST_STATE_PLAYING)
|
|
#define GST_STATE_PLAYING_TO_READY ((GST_STATE_PLAYING<<4) | GST_STATE_READY)
|
|
#define GST_STATE_READY_TO_NULL ((GST_STATE_READY<<4) | GST_STATE_NULL)
|
|
|
|
#define GST_TYPE_ELEMENT \
|
|
(gst_element_get_type())
|
|
#define GST_ELEMENT(obj) \
|
|
(GTK_CHECK_CAST((obj),GST_TYPE_ELEMENT,GstElement))
|
|
#define GST_ELEMENT_CLASS(klass) \
|
|
(GTK_CHECK_CLASS_CAST((klass),GST_TYPE_ELEMENT,GstElementClass))
|
|
#define GST_IS_ELEMENT(obj) \
|
|
(GTK_CHECK_TYPE((obj),GST_TYPE_ELEMENT))
|
|
#define GST_IS_ELEMENT_CLASS(klass) \
|
|
(GTK_CHECK_CLASS_TYPE((klass),GST_TYPE_ELEMENT))
|
|
|
|
typedef enum {
|
|
// element is complex (for some def.) and generally require a cothread
|
|
GST_ELEMENT_COMPLEX = GST_OBJECT_FLAG_LAST,
|
|
// input and output pads aren't directly coupled to each other
|
|
// examples: queues, multi-output async readers, etc.
|
|
GST_ELEMENT_DECOUPLED,
|
|
// this element should be placed in a thread if at all possible
|
|
GST_ELEMENT_THREAD_SUGGESTED,
|
|
// this element is incable of seeking (FIXME: does this apply to filters?)
|
|
GST_ELEMENT_NO_SEEK,
|
|
|
|
// there is a new loopfunction ready for placement
|
|
GST_ELEMENT_NEW_LOOPFUNC,
|
|
// the cothread holding this element needs to be stopped
|
|
GST_ELEMENT_COTHREAD_STOPPING,
|
|
// the element has to be scheduled as a cothread for any sanity
|
|
GST_ELEMENT_USE_COTHREAD,
|
|
|
|
/* use some padding for future expansion */
|
|
GST_ELEMENT_FLAG_LAST = GST_OBJECT_FLAG_LAST + 8,
|
|
} GstElementFlags;
|
|
|
|
#define GST_ELEMENT_IS_THREAD_SUGGESTED(obj) (GST_FLAG_IS_SET(obj,GST_ELEMENT_THREAD_SUGGESTED))
|
|
#define GST_ELEMENT_IS_COTHREAD_STOPPING(obj) (GST_FLAG_IS_SET(obj,GST_ELEMENT_COTHREAD_STOPPING))
|
|
|
|
|
|
typedef struct _GstElement GstElement;
|
|
typedef struct _GstElementClass GstElementClass;
|
|
typedef struct _GstElementDetails GstElementDetails;
|
|
typedef struct _GstElementFactory GstElementFactory;
|
|
|
|
typedef void (*GstElementLoopFunction) (GstElement *element);
|
|
|
|
struct _GstElement {
|
|
GstObject object;
|
|
|
|
gchar *name;
|
|
|
|
guint8 current_state;
|
|
guint8 pending_state;
|
|
|
|
GstElementLoopFunction loopfunc;
|
|
cothread_state *threadstate;
|
|
|
|
guint16 numpads;
|
|
guint16 numsrcpads;
|
|
guint16 numsinkpads;
|
|
GList *pads;
|
|
|
|
GstElement *manager;
|
|
};
|
|
|
|
struct _GstElementClass {
|
|
GstObjectClass parent_class;
|
|
|
|
/* the elementfactory that created us */
|
|
GstElementFactory *elementfactory;
|
|
|
|
/* signal callbacks */
|
|
void (*state_change) (GstElement *element,GstElementState state);
|
|
void (*new_pad) (GstElement *element,GstPad *pad);
|
|
void (*new_ghost_pad) (GstElement *element,GstPad *pad);
|
|
void (*error) (GstElement *element,gchar *error);
|
|
|
|
/* events */
|
|
// gboolean (*start) (GstElement *element,GstElementState state);
|
|
// gboolean (*stop) (GstElement *element);
|
|
|
|
/* change the element state */
|
|
GstElementStateReturn (*change_state) (GstElement *element);
|
|
|
|
/* create or read XML representation of self */
|
|
xmlNodePtr (*save_thyself) (GstElement *element, xmlNodePtr parent);
|
|
void (*restore_thyself) (GstElement *element, xmlNodePtr self, GHashTable *elements);
|
|
};
|
|
|
|
struct _GstElementDetails {
|
|
gchar *longname; /* long, english name */
|
|
gchar *klass; /* type of element, kinda */
|
|
gchar *description; /* insights of one form or another */
|
|
gchar *version; /* version of the element */
|
|
gchar *author; /* who wrote this thing? */
|
|
gchar *copyright; /* copyright details (year, etc.) */
|
|
};
|
|
|
|
struct _GstElementFactory {
|
|
gchar *name; /* name of element */
|
|
GtkType type; /* unique GtkType of element */
|
|
|
|
GstElementDetails *details; /* pointer to details struct */
|
|
|
|
GList *padtemplates;
|
|
};
|
|
|
|
GtkType gst_element_get_type (void);
|
|
GstElement* gst_element_new (void);
|
|
#define gst_element_destroy(element) gst_object_destroy (GST_OBJECT (element))
|
|
|
|
void gst_element_set_loop_function (GstElement *element,
|
|
GstElementLoopFunction loop);
|
|
|
|
void gst_element_set_name (GstElement *element, gchar *name);
|
|
const gchar* gst_element_get_name (GstElement *element);
|
|
|
|
void gst_element_set_manager (GstElement *element, GstElement *manager);
|
|
GstElement* gst_element_get_manager (GstElement *element);
|
|
|
|
void gst_element_add_pad (GstElement *element, GstPad *pad);
|
|
GstPad* gst_element_get_pad (GstElement *element, gchar *name);
|
|
GList* gst_element_get_pad_list (GstElement *element);
|
|
GList* gst_element_get_padtemplate_list (GstElement *element);
|
|
void gst_element_add_ghost_pad (GstElement *element, GstPad *pad);
|
|
|
|
void gst_element_connect (GstElement *src, gchar *srcpadname,
|
|
GstElement *dest, gchar *destpadname);
|
|
|
|
/* called by the app to set the state of the element */
|
|
gint gst_element_set_state (GstElement *element, GstElementState state);
|
|
|
|
void gst_element_error (GstElement *element, gchar *error);
|
|
|
|
GstElementFactory* gst_element_get_factory (GstElement *element);
|
|
int gst_element_loopfunc_wrapper (int argc,char **argv);
|
|
|
|
/* XML write and read */
|
|
xmlNodePtr gst_element_save_thyself (GstElement *element, xmlNodePtr parent);
|
|
GstElement* gst_element_load_thyself (xmlNodePtr parent, GHashTable *elements);
|
|
|
|
|
|
/*
|
|
*
|
|
* factories stuff
|
|
*
|
|
**/
|
|
GstElementFactory* gst_elementfactory_new (gchar *name,GtkType type,
|
|
GstElementDetails *details);
|
|
void gst_elementfactory_destroy (GstElementFactory *elementfactory);
|
|
|
|
void gst_elementfactory_add_padtemplate (GstElementFactory *elementfactory,
|
|
GstPadTemplate *pad);
|
|
|
|
GstElementFactory* gst_elementfactory_find (gchar *name);
|
|
GList* gst_elementfactory_get_list (void);
|
|
|
|
gboolean gst_elementfactory_can_src_caps (GstElementFactory *factory,
|
|
GstCaps *caps);
|
|
gboolean gst_elementfactory_can_sink_caps (GstElementFactory *factory,
|
|
GstCaps *caps);
|
|
|
|
GstElement* gst_elementfactory_create (GstElementFactory *factory,
|
|
gchar *name);
|
|
// FIXME this name is wrong, probably so is the one above it
|
|
GstElement* gst_elementfactory_make (gchar *factoryname, gchar *name);
|
|
|
|
xmlNodePtr gst_elementfactory_save_thyself (GstElementFactory *factory, xmlNodePtr parent);
|
|
GstElementFactory* gst_elementfactory_load_thyself (xmlNodePtr parent);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /* __cplusplus */
|
|
|
|
|
|
#endif /* __GST_ELEMENT_H__ */
|
|
|