/* 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)
typedef struct _GstBaseSink GstBaseSink;
typedef struct _GstBaseSinkClass GstBaseSinkClass;
typedef struct _GstBaseSinkPrivate GstBaseSinkPrivate;
/**
* GstBaseSink:
* @element: the parent element.
*
* 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 */
GQueue *preroll_queue;
gint preroll_queue_max_len;
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;
/*< private >*/ /* with LOCK */
GstClockID clock_id;
GstClockTime end_time;
gboolean sync;
gboolean flushing;
/*< private >*/
union {
struct {
/* segment used for clipping incomming buffers */
GstSegment *clip_segment;
/* max amount of time a buffer can be late, -1 no limit. */
gint64 max_lateness;
} ABI;
gpointer _gst_reserved[GST_PADDING_LARGE - 1];
} abidata;
GstBaseSinkPrivate *priv;
};
/**
* GstBaseSinkClass:
* @parent_class: Element parent class
* @get_caps: Called to get sink pad caps from the subclass
* @set_caps: Notify subclass of changed caps
* @buffer_alloc: Subclasses can override to perform custom buffer allocations
* @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.
* @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);
/* allocate a new buffer with given caps */
GstFlowReturn (*buffer_alloc) (GstBaseSink *sink, guint64 offset, guint size,
GstCaps *caps, GstBuffer **buf);
/* 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);
/* 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);
/* ABI additions */
/* when an ASYNC state change to PLAYING happens */ /* with LOCK */
GstStateChangeReturn (*async_play) (GstBaseSink *sink);
/* start or stop a pulling thread */
gboolean (*activate_pull)(GstBaseSink *sink, gboolean active);
/* fixate sink caps during pull-mode negotiation */
void (*fixate) (GstBaseSink *sink, GstCaps *caps);
/* 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);
/*< private >*/
gpointer _gst_reserved[GST_PADDING_LARGE-4];
};
#ifdef __SYMBIAN32__
IMPORT_C
#endif
GType gst_base_sink_get_type(void);
#ifdef __SYMBIAN32__
IMPORT_C
#endif
GstFlowReturn gst_base_sink_wait_preroll (GstBaseSink *sink);
/* synchronizing against the clock */
#ifdef __SYMBIAN32__
IMPORT_C
#endif
void gst_base_sink_set_sync (GstBaseSink *sink, gboolean sync);
#ifdef __SYMBIAN32__
IMPORT_C
#endif
gboolean gst_base_sink_get_sync (GstBaseSink *sink);
/* dropping late buffers */
#ifdef __SYMBIAN32__
IMPORT_C
#endif
void gst_base_sink_set_max_lateness (GstBaseSink *sink, gint64 max_lateness);
#ifdef __SYMBIAN32__
IMPORT_C
#endif
gint64 gst_base_sink_get_max_lateness (GstBaseSink *sink);
/* performing QoS */
#ifdef __SYMBIAN32__
IMPORT_C
#endif
void gst_base_sink_set_qos_enabled (GstBaseSink *sink, gboolean enabled);
#ifdef __SYMBIAN32__
IMPORT_C
#endif
gboolean gst_base_sink_is_qos_enabled (GstBaseSink *sink);
/* doing async state changes */
#ifdef __SYMBIAN32__
IMPORT_C
#endif
void gst_base_sink_set_async_enabled (GstBaseSink *sink, gboolean enabled);
#ifdef __SYMBIAN32__
IMPORT_C
#endif
gboolean gst_base_sink_is_async_enabled (GstBaseSink *sink);
/* tuning synchronisation */
#ifdef __SYMBIAN32__
IMPORT_C
#endif
void gst_base_sink_set_ts_offset (GstBaseSink *sink, GstClockTimeDiff offset);
#ifdef __SYMBIAN32__
IMPORT_C
#endif
GstClockTimeDiff gst_base_sink_get_ts_offset (GstBaseSink *sink);
/* last buffer */
#ifdef __SYMBIAN32__
IMPORT_C
#endif
GstBuffer * gst_base_sink_get_last_buffer (GstBaseSink *sink);
/* latency */
#ifdef __SYMBIAN32__
IMPORT_C
#endif
gboolean gst_base_sink_query_latency (GstBaseSink *sink, gboolean *live, gboolean *upstream_live,
GstClockTime *min_latency, GstClockTime *max_latency);
#ifdef __SYMBIAN32__
IMPORT_C
#endif
GstClockTime gst_base_sink_get_latency (GstBaseSink *sink);
#ifdef __SYMBIAN32__
IMPORT_C
#endif
GstFlowReturn gst_base_sink_wait_eos (GstBaseSink *sink, GstClockTime time,
GstClockTimeDiff *jitter);
G_END_DECLS
#endif /* __GST_BASE_SINK_H__ */