author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 22 Jan 2010 09:59:59 +0200 | |
changeset 2 | 5505e8908944 |
parent 0 | 0e761a78d257 |
child 7 | 567bb019e3e3 |
permissions | -rw-r--r-- |
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/* GStreamer |
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* Copyright (C) 2004 Wim Taymans <wim@fluendo.com> |
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* |
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* gstbus.h: Header for GstBus 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_BUS_H__ |
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#define __GST_BUS_H__ |
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typedef struct _GstBus GstBus; |
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typedef struct _GstBusPrivate GstBusPrivate; |
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typedef struct _GstBusClass GstBusClass; |
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#include <gst/gstmessage.h> |
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#include <gst/gstclock.h> |
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G_BEGIN_DECLS |
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/* --- standard type macros --- */ |
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#define GST_TYPE_BUS (gst_bus_get_type ()) |
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#define GST_BUS(bus) (G_TYPE_CHECK_INSTANCE_CAST ((bus), GST_TYPE_BUS, GstBus)) |
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#define GST_IS_BUS(bus) (G_TYPE_CHECK_INSTANCE_TYPE ((bus), GST_TYPE_BUS)) |
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#define GST_BUS_CLASS(bclass) (G_TYPE_CHECK_CLASS_CAST ((bclass), GST_TYPE_BUS, GstBusClass)) |
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#define GST_IS_BUS_CLASS(bclass) (G_TYPE_CHECK_CLASS_TYPE ((bclass), GST_TYPE_BUS)) |
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#define GST_BUS_GET_CLASS(bus) (G_TYPE_INSTANCE_GET_CLASS ((bus), GST_TYPE_BUS, GstBusClass)) |
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#define GST_BUS_CAST(bus) ((GstBus*)(bus)) |
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/** |
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* GstBusFlags: |
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* @GST_BUS_FLUSHING: The bus is currently dropping all messages |
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* @GST_BUS_FLAG_LAST: offset to define more flags |
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* |
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* The standard flags that a bus may have. |
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*/ |
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typedef enum { |
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GST_BUS_FLUSHING = (GST_OBJECT_FLAG_LAST << 0), |
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/* padding */ |
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GST_BUS_FLAG_LAST = (GST_OBJECT_FLAG_LAST << 1) |
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} GstBusFlags; |
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/** |
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* GstBusSyncReply: |
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* @GST_BUS_DROP: drop the message |
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* @GST_BUS_PASS: pass the message to the async queue |
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* @GST_BUS_ASYNC: pass message to async queue, continue if message is handled |
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* |
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* The result values for a GstBusSyncHandler. |
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*/ |
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typedef enum |
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{ |
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GST_BUS_DROP = 0, |
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GST_BUS_PASS = 1, |
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GST_BUS_ASYNC = 2 |
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} GstBusSyncReply; |
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/** |
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* GstBusSyncHandler: |
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* @bus: the #GstBus that sent the message |
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* @message: the #GstMessage |
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* @data: user data that has been given, when registering the handler |
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* |
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* Handler will be invoked synchronously, when a new message has been injected |
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* into the bus. This function is mostly used internally. Only one sync handler |
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* can be attached to a given bus. |
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* |
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* If the handler returns GST_BUS_DROP, it should unref the message, else the |
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* message should not be unreffed by the sync handler. |
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* |
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* Returns: #GstBusSyncReply stating what to do with the message |
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*/ |
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typedef GstBusSyncReply (*GstBusSyncHandler) (GstBus * bus, GstMessage * message, gpointer data); |
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/** |
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* GstBusFunc: |
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* @bus: the #GstBus that sent the message |
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* @message: the #GstMessage |
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* @data: user data that has been given, when registering the handler |
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* |
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* Specifies the type of function passed to gst_bus_add_watch() or |
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* gst_bus_add_watch_full(), which is called from the mainloop when a message |
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* is available on the bus. |
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* |
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* The message passed to the function will be unreffed after execution of this |
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* function so it should not be freed in the function. |
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* |
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* Note that this function is used as a GSourceFunc which means that returning |
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* FALSE will remove the GSource from the mainloop. |
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* |
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* Returns: %FALSE if the event source should be removed. |
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*/ |
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typedef gboolean (*GstBusFunc) (GstBus * bus, GstMessage * message, gpointer data); |
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|
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/** |
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* GstBus: |
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* |
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* The opaque #GstBus data structure. |
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*/ |
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struct _GstBus |
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{ |
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GstObject object; |
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|
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/*< private > */ |
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GQueue *queue; |
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GMutex *queue_lock; |
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|
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GstBusSyncHandler sync_handler; |
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gpointer sync_handler_data; |
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|
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guint signal_watch_id; |
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guint num_signal_watchers; |
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|
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/*< private > */ |
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GstBusPrivate *priv; |
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gpointer _gst_reserved[GST_PADDING - 1]; |
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}; |
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|
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struct _GstBusClass |
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{ |
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GstObjectClass parent_class; |
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|
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/* signals */ |
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void (*message) (GstBus *bus, GstMessage *message); |
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void (*sync_message) (GstBus *bus, GstMessage *message); |
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|
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/*< private > */ |
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gpointer _gst_reserved[GST_PADDING]; |
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}; |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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|
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GType gst_bus_get_type (void); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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|
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GstBus* gst_bus_new (void); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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|
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|
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gboolean gst_bus_post (GstBus * bus, GstMessage * message); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_bus_have_pending (GstBus * bus); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstMessage * gst_bus_peek (GstBus * bus); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstMessage * gst_bus_pop (GstBus * bus); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstMessage * gst_bus_pop_filtered (GstBus * bus, GstMessageType types); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstMessage * gst_bus_timed_pop (GstBus * bus, GstClockTime timeout); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstMessage * gst_bus_timed_pop_filtered (GstBus * bus, GstClockTime timeout, GstMessageType types); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_bus_set_flushing (GstBus * bus, gboolean flushing); |
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/* synchronous dispatching */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_bus_set_sync_handler (GstBus * bus, GstBusSyncHandler func, |
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gpointer data); |
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/* GSource based dispatching */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GSource * gst_bus_create_watch (GstBus * bus); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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guint gst_bus_add_watch_full (GstBus * bus, |
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gint priority, |
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GstBusFunc func, |
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gpointer user_data, |
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GDestroyNotify notify); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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guint gst_bus_add_watch (GstBus * bus, |
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GstBusFunc func, |
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gpointer user_data); |
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/* polling the bus */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstMessage* gst_bus_poll (GstBus *bus, GstMessageType events, |
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GstClockTimeDiff timeout); |
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/* signal based dispatching helper functions. */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_bus_async_signal_func (GstBus *bus, GstMessage *message, |
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gpointer data); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstBusSyncReply gst_bus_sync_signal_handler (GstBus *bus, GstMessage *message, |
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gpointer data); |
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/* convenience api to add/remove a gsource that emits the async signals */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_bus_add_signal_watch (GstBus * bus); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_bus_add_signal_watch_full (GstBus * bus, gint priority); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_bus_remove_signal_watch (GstBus * bus); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_bus_enable_sync_message_emission (GstBus * bus); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_bus_disable_sync_message_emission (GstBus * bus); |
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G_END_DECLS |
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#endif /* __GST_BUS_H__ */ |