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) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> |
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* 2000 Wim Taymans <wtay@chello.be> |
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* |
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* gstbasesink.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_BASE_SINK_H__ |
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#define __GST_BASE_SINK_H__ |
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#include <gst/gst.h> |
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G_BEGIN_DECLS |
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#define GST_TYPE_BASE_SINK (gst_base_sink_get_type()) |
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#define GST_BASE_SINK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_SINK,GstBaseSink)) |
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#define GST_BASE_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_SINK,GstBaseSinkClass)) |
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#define GST_BASE_SINK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BASE_SINK, GstBaseSinkClass)) |
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#define GST_IS_BASE_SINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_SINK)) |
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#define GST_IS_BASE_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_SINK)) |
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#define GST_BASE_SINK_CAST(obj) ((GstBaseSink *) (obj)) |
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/** |
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* GST_BASE_SINK_PAD: |
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* @obj: base sink instance |
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* |
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* Gives the pointer to the #GstPad object of the element. |
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*/ |
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#define GST_BASE_SINK_PAD(obj) (GST_BASE_SINK_CAST (obj)->sinkpad) |
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typedef struct _GstBaseSink GstBaseSink; |
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typedef struct _GstBaseSinkClass GstBaseSinkClass; |
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typedef struct _GstBaseSinkPrivate GstBaseSinkPrivate; |
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/** |
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* GstBaseSink: |
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* @element: the parent element. |
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* |
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* The opaque #GstBaseSink data structure. |
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*/ |
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struct _GstBaseSink { |
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GstElement element; |
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/*< protected >*/ |
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GstPad *sinkpad; |
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GstActivateMode pad_mode; |
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/*< protected >*/ /* with LOCK */ |
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guint64 offset; |
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gboolean can_activate_pull; |
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gboolean can_activate_push; |
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/*< protected >*/ /* with PREROLL_LOCK */ |
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GQueue *preroll_queue; |
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gint preroll_queue_max_len; |
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gint preroll_queued; |
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gint buffers_queued; |
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gint events_queued; |
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gboolean eos; |
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gboolean eos_queued; |
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gboolean need_preroll; |
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gboolean have_preroll; |
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gboolean playing_async; |
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/*< protected >*/ /* with STREAM_LOCK */ |
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gboolean have_newsegment; |
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GstSegment segment; |
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/*< private >*/ /* with LOCK */ |
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GstClockID clock_id; |
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GstClockTime end_time; |
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gboolean sync; |
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gboolean flushing; |
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/*< private >*/ |
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union { |
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struct { |
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/* segment used for clipping incomming buffers */ |
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GstSegment *clip_segment; |
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/* max amount of time a buffer can be late, -1 no limit. */ |
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gint64 max_lateness; |
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} ABI; |
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gpointer _gst_reserved[GST_PADDING_LARGE - 1]; |
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} abidata; |
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GstBaseSinkPrivate *priv; |
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}; |
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104 |
|
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/** |
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* GstBaseSinkClass: |
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* @parent_class: Element parent class |
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* @get_caps: Called to get sink pad caps from the subclass |
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* @set_caps: Notify subclass of changed caps |
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* @buffer_alloc: Subclasses can override to perform custom buffer allocations |
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* @get_times: Called to get the start and end times for synchronising |
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* the passed buffer to the clock |
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* @start: Start processing. Ideal for opening resources in the subclass |
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* @stop: Stop processing. Subclasses should use this to close resources. |
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* @unlock: Unlock any pending access to the resource. Subclasses should |
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* unblock any blocked function ASAP |
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* @unlock_stop: Clear the previous unlock request. Subclasses should clear |
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* any state they set during unlock(), such as clearing command queues. |
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* @event: Override this to handle events arriving on the sink pad |
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* @preroll: Called to present the preroll buffer if desired |
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* @render: Called when a buffer should be presented or output, at the |
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* correct moment if the #GstBaseSink has been set to sync to the clock. |
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* @async_play: Subclasses should override this when they need to perform |
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* special processing when changing to the PLAYING state asynchronously. |
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* Called with the OBJECT_LOCK held. |
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* @activate_pull: Subclasses should override this when they can provide an |
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* alternate method of spawning a thread to drive the pipeline in pull mode. |
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* Should start or stop the pulling thread, depending on the value of the |
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* "active" argument. Called after actually activating the sink pad in pull |
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* mode. The default implementation starts a task on the sink pad. |
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* @fixate: Only useful in pull mode, this vmethod will be called in response to |
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* gst_pad_fixate_caps() being called on the sink pad. Implement if you have |
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* ideas about what should be the default values for the caps you support. |
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* |
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* Subclasses can override any of the available virtual methods or not, as |
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* needed. At the minimum, the @render method should be overridden to |
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* output/present buffers. |
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*/ |
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struct _GstBaseSinkClass { |
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GstElementClass parent_class; |
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141 |
|
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/* get caps from subclass */ |
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GstCaps* (*get_caps) (GstBaseSink *sink); |
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/* notify subclass of new caps */ |
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gboolean (*set_caps) (GstBaseSink *sink, GstCaps *caps); |
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146 |
|
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/* allocate a new buffer with given caps */ |
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GstFlowReturn (*buffer_alloc) (GstBaseSink *sink, guint64 offset, guint size, |
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GstCaps *caps, GstBuffer **buf); |
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150 |
|
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/* get the start and end times for syncing on this buffer */ |
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void (*get_times) (GstBaseSink *sink, GstBuffer *buffer, |
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GstClockTime *start, GstClockTime *end); |
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154 |
|
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/* start and stop processing, ideal for opening/closing the resource */ |
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gboolean (*start) (GstBaseSink *sink); |
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gboolean (*stop) (GstBaseSink *sink); |
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158 |
|
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/* unlock any pending access to the resource. subclasses should unlock |
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* any function ASAP. */ |
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gboolean (*unlock) (GstBaseSink *sink); |
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162 |
|
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/* notify subclass of event, preroll buffer or real buffer */ |
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gboolean (*event) (GstBaseSink *sink, GstEvent *event); |
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GstFlowReturn (*preroll) (GstBaseSink *sink, GstBuffer *buffer); |
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GstFlowReturn (*render) (GstBaseSink *sink, GstBuffer *buffer); |
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167 |
|
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/* ABI additions */ |
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169 |
|
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/* when an ASYNC state change to PLAYING happens */ /* with LOCK */ |
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GstStateChangeReturn (*async_play) (GstBaseSink *sink); |
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172 |
|
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/* start or stop a pulling thread */ |
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gboolean (*activate_pull)(GstBaseSink *sink, gboolean active); |
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|
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/* fixate sink caps during pull-mode negotiation */ |
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void (*fixate) (GstBaseSink *sink, GstCaps *caps); |
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|
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/* Clear a previously indicated unlock request not that unlocking is |
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* complete. Sub-classes should clear any command queue or indicator they |
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* set during unlock */ |
30 | 182 |
gboolean (*unlock_stop) (GstBaseSink *sink); |
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|
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/*< private >*/ |
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gpointer _gst_reserved[GST_PADDING_LARGE-4]; |
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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_base_sink_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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GstFlowReturn gst_base_sink_wait_preroll (GstBaseSink *sink); |
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|
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/* synchronizing against the clock */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_base_sink_set_sync (GstBaseSink *sink, gboolean sync); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_base_sink_get_sync (GstBaseSink *sink); |
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/* dropping late buffers */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_base_sink_set_max_lateness (GstBaseSink *sink, gint64 max_lateness); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gint64 gst_base_sink_get_max_lateness (GstBaseSink *sink); |
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/* performing QoS */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_base_sink_set_qos_enabled (GstBaseSink *sink, gboolean enabled); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_base_sink_is_qos_enabled (GstBaseSink *sink); |
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/* doing async state changes */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_base_sink_set_async_enabled (GstBaseSink *sink, gboolean enabled); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_base_sink_is_async_enabled (GstBaseSink *sink); |
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/* tuning synchronisation */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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void gst_base_sink_set_ts_offset (GstBaseSink *sink, GstClockTimeDiff offset); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstClockTimeDiff gst_base_sink_get_ts_offset (GstBaseSink *sink); |
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/* last buffer */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstBuffer * gst_base_sink_get_last_buffer (GstBaseSink *sink); |
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/* latency */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_base_sink_query_latency (GstBaseSink *sink, gboolean *live, gboolean *upstream_live, |
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GstClockTime *min_latency, GstClockTime *max_latency); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GstClockTime gst_base_sink_get_latency (GstBaseSink *sink); |
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IMPORT_C |
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#endif |
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GstFlowReturn gst_base_sink_wait_eos (GstBaseSink *sink, GstClockTime time, |
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GstClockTimeDiff *jitter); |
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G_END_DECLS |
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#endif /* __GST_BASE_SINK_H__ */ |