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gstreamer/libs/gst/base/gstbasesink.h
Wim Taymans 6ab7e6c15d Remove pad_alloc, this can now be done better 
Remove pad_alloc and all references. This can now be done more efficiently and
more flexible with the ALLOCATION query and the bufferpool objects. There is no
reverse negotiation yet but that will be done with an event later.
2011-04-29 13:26:19 +02:00

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstbasesink.h:
*
* 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_BASE_SINK_H__
#define __GST_BASE_SINK_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_BASE_SINK (gst_base_sink_get_type())
#define GST_BASE_SINK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_SINK,GstBaseSink))
#define GST_BASE_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_SINK,GstBaseSinkClass))
#define GST_BASE_SINK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BASE_SINK, GstBaseSinkClass))
#define GST_IS_BASE_SINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_SINK))
#define GST_IS_BASE_SINK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_SINK))
#define GST_BASE_SINK_CAST(obj) ((GstBaseSink *) (obj))
/**
* GST_BASE_SINK_PAD:
* @obj: base sink instance
*
* Gives the pointer to the #GstPad object of the element.
*/
#define GST_BASE_SINK_PAD(obj) (GST_BASE_SINK_CAST (obj)->sinkpad)
#define GST_BASE_SINK_GET_PREROLL_LOCK(pad) (GST_BASE_SINK_CAST(pad)->preroll_lock)
#define GST_BASE_SINK_PREROLL_LOCK(pad) (g_mutex_lock(GST_BASE_SINK_GET_PREROLL_LOCK(pad)))
#define GST_BASE_SINK_PREROLL_TRYLOCK(pad) (g_mutex_trylock(GST_BASE_SINK_GET_PREROLL_LOCK(pad)))
#define GST_BASE_SINK_PREROLL_UNLOCK(pad) (g_mutex_unlock(GST_BASE_SINK_GET_PREROLL_LOCK(pad)))
#define GST_BASE_SINK_GET_PREROLL_COND(pad) (GST_BASE_SINK_CAST(pad)->preroll_cond)
#define GST_BASE_SINK_PREROLL_WAIT(pad) \
g_cond_wait (GST_BASE_SINK_GET_PREROLL_COND (pad), GST_BASE_SINK_GET_PREROLL_LOCK (pad))
#define GST_BASE_SINK_PREROLL_TIMED_WAIT(pad, timeval) \
g_cond_timed_wait (GST_BASE_SINK_GET_PREROLL_COND (pad), GST_BASE_SINK_GET_PREROLL_LOCK (pad), timeval)
#define GST_BASE_SINK_PREROLL_SIGNAL(pad) g_cond_signal (GST_BASE_SINK_GET_PREROLL_COND (pad));
#define GST_BASE_SINK_PREROLL_BROADCAST(pad) g_cond_broadcast (GST_BASE_SINK_GET_PREROLL_COND (pad));
typedef struct _GstBaseSink GstBaseSink;
typedef struct _GstBaseSinkClass GstBaseSinkClass;
typedef struct _GstBaseSinkPrivate GstBaseSinkPrivate;
/**
* GstBaseSink:
*
* The opaque #GstBaseSink data structure.
*/
struct _GstBaseSink {
GstElement element;
/*< protected >*/
GstPad *sinkpad;
GstActivateMode pad_mode;
/*< protected >*/ /* with LOCK */
guint64 offset;
gboolean can_activate_pull;
gboolean can_activate_push;
/*< protected >*/ /* with PREROLL_LOCK */
GMutex *preroll_lock;
GCond *preroll_cond;
GQueue *preroll_queue;
gint preroll_queue_max_len; /* FIXME-0.11: the property is guint */
gint preroll_queued;
gint buffers_queued;
gint events_queued;
gboolean eos;
gboolean eos_queued;
gboolean need_preroll;
gboolean have_preroll;
gboolean playing_async;
/*< protected >*/ /* with STREAM_LOCK */
gboolean have_newsegment;
GstSegment segment;
GstSegment *clip_segment;
/*< private >*/ /* with LOCK */
GstClockID clock_id;
GstClockTime end_time;
gboolean sync;
gboolean flushing;
gboolean running;
gint64 max_lateness;
/*< private >*/
GstBaseSinkPrivate *priv;
gpointer _gst_reserved[GST_PADDING_LARGE];
};
/**
* GstBaseSinkClass:
* @parent_class: Element parent class
* @get_caps: Called to get sink pad caps from the subclass
* @set_caps: Notify subclass of changed caps
* @get_times: Called to get the start and end times for synchronising
* the passed buffer to the clock
* @start: Start processing. Ideal for opening resources in the subclass
* @stop: Stop processing. Subclasses should use this to close resources.
* @unlock: Unlock any pending access to the resource. Subclasses should
* unblock any blocked function ASAP
* @unlock_stop: Clear the previous unlock request. Subclasses should clear
* any state they set during unlock(), such as clearing command queues.
* @event: Override this to handle events arriving on the sink pad
* @preroll: Called to present the preroll buffer if desired
* @render: Called when a buffer should be presented or output, at the
* correct moment if the #GstBaseSink has been set to sync to the clock.
* @render_list: Same as @render but used whith buffer lists instead of
* buffers. Since: 0.10.24
* @async_play: Subclasses should override this when they need to perform
* special processing when changing to the PLAYING state asynchronously.
* Called with the OBJECT_LOCK held.
* @activate_pull: Subclasses should override this when they can provide an
* alternate method of spawning a thread to drive the pipeline in pull mode.
* Should start or stop the pulling thread, depending on the value of the
* "active" argument. Called after actually activating the sink pad in pull
* mode. The default implementation starts a task on the sink pad.
* @fixate: Only useful in pull mode, this vmethod will be called in response to
* gst_pad_fixate_caps() being called on the sink pad. Implement if you have
* ideas about what should be the default values for the caps you support.
*
* Subclasses can override any of the available virtual methods or not, as
* needed. At the minimum, the @render method should be overridden to
* output/present buffers.
*/
struct _GstBaseSinkClass {
GstElementClass parent_class;
/* get caps from subclass */
GstCaps* (*get_caps) (GstBaseSink *sink);
/* notify subclass of new caps */
gboolean (*set_caps) (GstBaseSink *sink, GstCaps *caps);
/* fixate sink caps during pull-mode negotiation */
void (*fixate) (GstBaseSink *sink, GstCaps *caps);
/* start or stop a pulling thread */
gboolean (*activate_pull)(GstBaseSink *sink, gboolean active);
/* get the start and end times for syncing on this buffer */
void (*get_times) (GstBaseSink *sink, GstBuffer *buffer,
GstClockTime *start, GstClockTime *end);
/* start and stop processing, ideal for opening/closing the resource */
gboolean (*start) (GstBaseSink *sink);
gboolean (*stop) (GstBaseSink *sink);
/* unlock any pending access to the resource. subclasses should unlock
* any function ASAP. */
gboolean (*unlock) (GstBaseSink *sink);
/* Clear a previously indicated unlock request not that unlocking is
* complete. Sub-classes should clear any command queue or indicator they
* set during unlock */
gboolean (*unlock_stop) (GstBaseSink *sink);
/* notify subclass of event, preroll buffer or real buffer */
gboolean (*event) (GstBaseSink *sink, GstEvent *event);
GstFlowReturn (*preroll) (GstBaseSink *sink, GstBuffer *buffer);
GstFlowReturn (*render) (GstBaseSink *sink, GstBuffer *buffer);
/* Render a BufferList */
GstFlowReturn (*render_list) (GstBaseSink *sink, GstBufferList *buffer_list);
/*< private >*/
gpointer _gst_reserved[GST_PADDING_LARGE];
};
GType gst_base_sink_get_type(void);
GstFlowReturn gst_base_sink_do_preroll (GstBaseSink *sink, GstMiniObject *obj);
GstFlowReturn gst_base_sink_wait_preroll (GstBaseSink *sink);
/* synchronizing against the clock */
void gst_base_sink_set_sync (GstBaseSink *sink, gboolean sync);
gboolean gst_base_sink_get_sync (GstBaseSink *sink);
/* dropping late buffers */
void gst_base_sink_set_max_lateness (GstBaseSink *sink, gint64 max_lateness);
gint64 gst_base_sink_get_max_lateness (GstBaseSink *sink);
/* performing QoS */
void gst_base_sink_set_qos_enabled (GstBaseSink *sink, gboolean enabled);
gboolean gst_base_sink_is_qos_enabled (GstBaseSink *sink);
/* doing async state changes */
void gst_base_sink_set_async_enabled (GstBaseSink *sink, gboolean enabled);
gboolean gst_base_sink_is_async_enabled (GstBaseSink *sink);
/* tuning synchronisation */
void gst_base_sink_set_ts_offset (GstBaseSink *sink, GstClockTimeDiff offset);
GstClockTimeDiff gst_base_sink_get_ts_offset (GstBaseSink *sink);
/* last buffer */
GstBuffer * gst_base_sink_get_last_buffer (GstBaseSink *sink);
void gst_base_sink_set_last_buffer_enabled (GstBaseSink *sink, gboolean enabled);
gboolean gst_base_sink_is_last_buffer_enabled (GstBaseSink *sink);
/* latency */
gboolean gst_base_sink_query_latency (GstBaseSink *sink, gboolean *live, gboolean *upstream_live,
GstClockTime *min_latency, GstClockTime *max_latency);
GstClockTime gst_base_sink_get_latency (GstBaseSink *sink);
/* render delay */
void gst_base_sink_set_render_delay (GstBaseSink *sink, GstClockTime delay);
GstClockTime gst_base_sink_get_render_delay (GstBaseSink *sink);
/* blocksize */
void gst_base_sink_set_blocksize (GstBaseSink *sink, guint blocksize);
guint gst_base_sink_get_blocksize (GstBaseSink *sink);
/* throttle-time */
void gst_base_sink_set_throttle_time (GstBaseSink *sink, guint64 throttle);
guint64 gst_base_sink_get_throttle_time (GstBaseSink *sink);
GstClockReturn gst_base_sink_wait_clock (GstBaseSink *sink, GstClockTime time,
GstClockTimeDiff * jitter);
GstFlowReturn gst_base_sink_wait_eos (GstBaseSink *sink, GstClockTime time,
GstClockTimeDiff *jitter);
G_END_DECLS
#endif /* __GST_BASE_SINK_H__ */
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