author | hgs |
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changeset 20 | 7e3786c5ed27 |
parent 16 | 8e837d1bf446 |
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permissions | -rw-r--r-- |
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/* GStreamer |
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> |
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* <2005> Wim Taymans <wim@fluendo.com> |
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* |
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* gsttask.h: Streaming tasks |
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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_TASK_H__ |
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#define __GST_TASK_H__ |
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#include <gst/gstobject.h> |
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#include <gst/gsttaskpool.h> |
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G_BEGIN_DECLS |
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/** |
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* GstTaskFunction: |
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* @data: user data passed to the function |
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* |
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* A function that will repeatedly be called in the thread created by |
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* a #GstTask. |
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*/ |
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typedef void (*GstTaskFunction) (void *data); |
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/* --- standard type macros --- */ |
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#define GST_TYPE_TASK (gst_task_get_type ()) |
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#define GST_TASK(task) (G_TYPE_CHECK_INSTANCE_CAST ((task), GST_TYPE_TASK, GstTask)) |
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#define GST_IS_TASK(task) (G_TYPE_CHECK_INSTANCE_TYPE ((task), GST_TYPE_TASK)) |
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#define GST_TASK_CLASS(tclass) (G_TYPE_CHECK_CLASS_CAST ((tclass), GST_TYPE_TASK, GstTaskClass)) |
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#define GST_IS_TASK_CLASS(tclass) (G_TYPE_CHECK_CLASS_TYPE ((tclass), GST_TYPE_TASK)) |
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#define GST_TASK_GET_CLASS(task) (G_TYPE_INSTANCE_GET_CLASS ((task), GST_TYPE_TASK, GstTaskClass)) |
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#define GST_TASK_CAST(task) ((GstTask*)(task)) |
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typedef struct _GstTask GstTask; |
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typedef struct _GstTaskClass GstTaskClass; |
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typedef struct _GstTaskPrivate GstTaskPrivate; |
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/** |
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* GstTaskState: |
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* @GST_TASK_STARTED: the task is started and running |
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* @GST_TASK_STOPPED: the task is stopped |
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* @GST_TASK_PAUSED: the task is paused |
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* |
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* The different states a task can be in |
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*/ |
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typedef enum { |
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GST_TASK_STARTED, |
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GST_TASK_STOPPED, |
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GST_TASK_PAUSED |
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} GstTaskState; |
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/** |
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* GST_TASK_STATE: |
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* @task: Task to get the state of |
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* |
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* Get access to the state of the task. |
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*/ |
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#define GST_TASK_STATE(task) (GST_TASK_CAST(task)->state) |
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/** |
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* GST_TASK_GET_COND: |
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* @task: Task to get the cond of |
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* |
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* Get access to the cond of the task. |
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*/ |
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#define GST_TASK_GET_COND(task) (GST_TASK_CAST(task)->cond) |
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/** |
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* GST_TASK_WAIT: |
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* @task: Task to wait for |
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* |
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* Wait for the task cond to be signalled |
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*/ |
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#define GST_TASK_WAIT(task) g_cond_wait(GST_TASK_GET_COND (task), GST_OBJECT_GET_LOCK (task)) |
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/** |
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* GST_TASK_SIGNAL: |
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* @task: Task to signal |
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* |
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* Signal the task cond |
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*/ |
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#define GST_TASK_SIGNAL(task) g_cond_signal(GST_TASK_GET_COND (task)) |
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/** |
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* GST_TASK_BROADCAST: |
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* @task: Task to broadcast |
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* |
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* Send a broadcast signal to all waiting task conds |
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*/ |
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#define GST_TASK_BROADCAST(task) g_cond_breadcast(GST_TASK_GET_COND (task)) |
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/** |
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* GST_TASK_GET_LOCK: |
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* @task: Task to get the lock of |
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* |
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* Get access to the task lock. |
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*/ |
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#define GST_TASK_GET_LOCK(task) (GST_TASK_CAST(task)->lock) |
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/** |
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* GstTaskThreadCallbacks: |
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* @enter_thread: a thread is entered, this callback is called when the new |
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* thread enters its function. |
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* @leave_thread: a thread is exiting, this is called when the thread is about |
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* to leave its function |
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* |
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* Custom GstTask thread callback functions that can be installed. |
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* |
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* Since: 0.10.24 |
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*/ |
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typedef struct { |
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/* manage the lifetime of the thread */ |
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void (*enter_thread) (GstTask *task, GThread *thread, gpointer user_data); |
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void (*leave_thread) (GstTask *task, GThread *thread, gpointer user_data); |
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/*< private >*/ |
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gpointer _gst_reserved[GST_PADDING]; |
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} GstTaskThreadCallbacks; |
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/** |
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* GstTask: |
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* @state: the state of the task |
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* @cond: used to pause/resume the task |
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* @lock: The lock taken when iterating the task function |
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* @func: the function executed by this task |
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* @data: data passed to the task function |
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* @running: a flag indicating that the task is running |
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* |
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* The #GstTask object. |
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*/ |
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struct _GstTask { |
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GstObject object; |
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|
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/*< public >*/ /* with LOCK */ |
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GstTaskState state; |
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GCond *cond; |
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|
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GStaticRecMutex *lock; |
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|
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GstTaskFunction func; |
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gpointer data; |
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|
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gboolean running; |
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|
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/*< private >*/ |
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union { |
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struct { |
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/* thread this task is currently running in */ |
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GThread *thread; |
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} ABI; |
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gpointer _gst_reserved[GST_PADDING - 1]; |
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} abidata; |
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|
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GstTaskPrivate *priv; |
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}; |
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|
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struct _GstTaskClass { |
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GstObjectClass parent_class; |
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|
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/*< private >*/ |
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GstTaskPool *pool; |
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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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void gst_task_cleanup_all (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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GType gst_task_get_type (void); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstTask* gst_task_create (GstTaskFunction func, gpointer data); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_task_set_lock (GstTask *task, GStaticRecMutex *mutex); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_task_set_priority (GstTask *task, GThreadPriority priority); |
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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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GstTaskPool * gst_task_get_pool (GstTask *task); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_task_set_pool (GstTask *task, GstTaskPool *pool); |
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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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void gst_task_set_thread_callbacks (GstTask *task, |
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GstTaskThreadCallbacks *callbacks, |
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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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||
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GstTaskState gst_task_get_state (GstTask *task); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_task_set_state (GstTask *task, GstTaskState state); |
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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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gboolean gst_task_start (GstTask *task); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_task_stop (GstTask *task); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_task_pause (GstTask *task); |
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IMPORT_C |
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#endif |
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gboolean gst_task_join (GstTask *task); |
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G_END_DECLS |
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#endif /* __GST_TASK_H__ */ |