author | Pat Downey <patd@symbian.org> |
Wed, 01 Sep 2010 12:16:41 +0100 | |
branch | RCL_3 |
changeset 30 | 7e817e7e631c |
parent 29 | 567bb019e3e3 |
permissions | -rw-r--r-- |
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/* GStreamer |
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* Copyright (C) 2006 Edward Hervey <edward@fluendo.com> |
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* |
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* gstdataqueue.h: |
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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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|
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#ifndef __GST_DATA_QUEUE_H__ |
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#define __GST_DATA_QUEUE_H__ |
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#include <gst/gst.h> |
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G_BEGIN_DECLS |
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#define GST_TYPE_DATA_QUEUE \ |
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(gst_data_queue_get_type()) |
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#define GST_DATA_QUEUE(obj) \ |
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DATA_QUEUE,GstDataQueue)) |
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#define GST_DATA_QUEUE_CLASS(klass) \ |
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DATA_QUEUE,GstDataQueueClass)) |
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#define GST_IS_DATA_QUEUE(obj) \ |
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DATA_QUEUE)) |
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#define GST_IS_DATA_QUEUE_CLASS(klass) \ |
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DATA_QUEUE)) |
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typedef struct _GstDataQueue GstDataQueue; |
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typedef struct _GstDataQueueClass GstDataQueueClass; |
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typedef struct _GstDataQueueSize GstDataQueueSize; |
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typedef struct _GstDataQueueItem GstDataQueueItem; |
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|
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/** |
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* GstDataQueueItem: |
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* @object: the #GstMiniObject to queue. |
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* @size: the size in bytes of the miniobject. |
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* @duration: the duration in #GstClockTime of the miniobject. Can not be |
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* #GST_CLOCK_TIME_NONE. |
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* @visible: #TRUE if @object should be considered as a visible object. |
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* @destroy: The #GDestroyNotify function to use to free the #GstDataQueueItem. |
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* This function should also drop the reference to @object the owner of the |
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* #GstDataQueueItem is assumed to hold. |
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* |
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* Structure used by #GstDataQueue. You can supply a different structure, as |
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* long as the top of the structure is identical to this structure. |
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*/ |
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struct _GstDataQueueItem |
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{ |
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GstMiniObject *object; |
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guint size; |
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guint64 duration; |
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gboolean visible; |
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/* user supplied destroy function */ |
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GDestroyNotify destroy; |
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}; |
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|
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/** |
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* GstDataQueueSize: |
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* @visible: number of buffers |
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* @bytes: number of bytes |
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* @time: amount of time |
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* |
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* Structure describing the size of a queue. |
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*/ |
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struct _GstDataQueueSize |
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{ |
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guint visible; |
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guint bytes; |
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guint64 time; |
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}; |
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|
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/** |
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* GstDataQueueCheckFullFunction: |
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* @queue: a #GstDataQueue. |
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* @visible: The number of visible items currently in the queue. |
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* @bytes: The amount of bytes currently in the queue. |
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* @time: The accumulated duration of the items currently in the queue. |
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* @checkdata: The #gpointer registered when the #GstDataQueue was created. |
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* |
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* The prototype of the function used to inform the queue that it should be |
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* considered as full. |
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* |
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* Returns: #TRUE if the queue should be considered full. |
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*/ |
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typedef gboolean (*GstDataQueueCheckFullFunction) (GstDataQueue * queue, |
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guint visible, guint bytes, guint64 time, gpointer checkdata); |
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/** |
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* GstDataQueue: |
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* |
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* Opaque #GstDataQueue structure. |
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*/ |
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struct _GstDataQueue |
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{ |
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GObject object; |
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30 | 110 |
/*< private > */ |
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/* the queue of data we're keeping our grubby hands on */ |
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GQueue *queue; |
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GstDataQueueSize cur_level; /* size of the queue */ |
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GstDataQueueCheckFullFunction checkfull; /* Callback to check if the queue is full */ |
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gpointer *checkdata; |
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GMutex *qlock; /* lock for queue (vs object lock) */ |
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GCond *item_add; /* signals buffers now available for reading */ |
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GCond *item_del; /* signals space now available for writing */ |
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gboolean flushing; /* indicates whether conditions where signalled because |
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* of external flushing */ |
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gpointer _gst_reserved[GST_PADDING]; |
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}; |
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struct _GstDataQueueClass |
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{ |
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GObjectClass parent_class; |
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/* signals */ |
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void (*empty) (GstDataQueue * queue); |
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void (*full) (GstDataQueue * queue); |
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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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GType gst_data_queue_get_type (void); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstDataQueue * gst_data_queue_new (GstDataQueueCheckFullFunction checkfull, |
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gpointer checkdata); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_data_queue_push (GstDataQueue * queue, GstDataQueueItem * item); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_data_queue_pop (GstDataQueue * queue, GstDataQueueItem ** item); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_data_queue_flush (GstDataQueue * queue); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_data_queue_set_flushing (GstDataQueue * queue, gboolean flushing); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_data_queue_drop_head (GstDataQueue * queue, GType type); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_data_queue_is_full (GstDataQueue * queue); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_data_queue_is_empty (GstDataQueue * queue); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_data_queue_get_level (GstDataQueue * queue, GstDataQueueSize *level); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_data_queue_limits_changed (GstDataQueue * queue); |
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G_END_DECLS |
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#endif /* __GST_DATA_QUEUE_H__ */ |