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255 lines
11 KiB
C
255 lines
11 KiB
C
/* 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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#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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#define GST_BASE_SINK_GET_PREROLL_LOCK(pad) (&GST_BASE_SINK_CAST(pad)->preroll_lock)
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#define GST_BASE_SINK_PREROLL_LOCK(pad) (g_mutex_lock(GST_BASE_SINK_GET_PREROLL_LOCK(pad)))
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#define GST_BASE_SINK_PREROLL_TRYLOCK(pad) (g_mutex_trylock(GST_BASE_SINK_GET_PREROLL_LOCK(pad)))
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#define GST_BASE_SINK_PREROLL_UNLOCK(pad) (g_mutex_unlock(GST_BASE_SINK_GET_PREROLL_LOCK(pad)))
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#define GST_BASE_SINK_GET_PREROLL_COND(pad) (&GST_BASE_SINK_CAST(pad)->preroll_cond)
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#define GST_BASE_SINK_PREROLL_WAIT(pad) \
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g_cond_wait (GST_BASE_SINK_GET_PREROLL_COND (pad), GST_BASE_SINK_GET_PREROLL_LOCK (pad))
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#define GST_BASE_SINK_PREROLL_WAIT_UNTIL(pad, end_time) \
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g_cond_wait_until (GST_BASE_SINK_GET_PREROLL_COND (pad), GST_BASE_SINK_GET_PREROLL_LOCK (pad), end_time)
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#define GST_BASE_SINK_PREROLL_SIGNAL(pad) g_cond_signal (GST_BASE_SINK_GET_PREROLL_COND (pad));
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#define GST_BASE_SINK_PREROLL_BROADCAST(pad) g_cond_broadcast (GST_BASE_SINK_GET_PREROLL_COND (pad));
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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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*
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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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GstPadMode 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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GMutex preroll_lock;
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GCond preroll_cond;
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gboolean eos;
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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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gboolean sync;
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gboolean flushing;
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gboolean running;
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gint64 max_lateness;
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/*< private >*/
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GstBaseSinkPrivate *priv;
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gpointer _gst_reserved[GST_PADDING_LARGE];
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};
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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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* @fixate: Only useful in pull mode. 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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* @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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* @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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* @propose_allocation: configure the allocation query
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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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* @query: perform a #GstQuery on the element.
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* @event: Override this to handle events arriving on the sink pad
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* @wait_event: Override this to implement custom logic to wait for the event
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* time (for events like EOS and GAP). Subclasses should always first
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* chain up to the default implementation.
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* @prepare: Called to prepare the buffer for @render and @preroll. This
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* function is called before synchronisation is performed.
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* @prepare_list: Called to prepare the buffer list for @render_list. This
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* function is called before synchronisation is performed.
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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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* @render_list: Same as @render but used whith buffer lists instead of
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* buffers.
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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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/* get caps from subclass */
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GstCaps* (*get_caps) (GstBaseSink *sink, GstCaps *filter);
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/* notify subclass of new caps */
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gboolean (*set_caps) (GstBaseSink *sink, GstCaps *caps);
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/* fixate sink caps during pull-mode negotiation */
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GstCaps * (*fixate) (GstBaseSink *sink, GstCaps *caps);
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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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/* 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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/* propose allocation parameters for upstream */
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gboolean (*propose_allocation) (GstBaseSink *sink, GstQuery *query);
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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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/* 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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/* 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 */
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gboolean (*unlock_stop) (GstBaseSink *sink);
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/* notify subclass of query */
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gboolean (*query) (GstBaseSink *sink, GstQuery *query);
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/* notify subclass of event */
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gboolean (*event) (GstBaseSink *sink, GstEvent *event);
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/* wait for eos or gap, subclasses should chain up to parent first */
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GstFlowReturn (*wait_event) (GstBaseSink *sink, GstEvent *event);
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/* notify subclass of buffer or list before doing sync */
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GstFlowReturn (*prepare) (GstBaseSink *sink, GstBuffer *buffer);
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GstFlowReturn (*prepare_list) (GstBaseSink *sink, GstBufferList *buffer_list);
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/* notify subclass of preroll buffer or real buffer */
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GstFlowReturn (*preroll) (GstBaseSink *sink, GstBuffer *buffer);
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GstFlowReturn (*render) (GstBaseSink *sink, GstBuffer *buffer);
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/* Render a BufferList */
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GstFlowReturn (*render_list) (GstBaseSink *sink, GstBufferList *buffer_list);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING_LARGE];
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};
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GType gst_base_sink_get_type(void);
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GstFlowReturn gst_base_sink_do_preroll (GstBaseSink *sink, GstMiniObject *obj);
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GstFlowReturn gst_base_sink_wait_preroll (GstBaseSink *sink);
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/* synchronizing against the clock */
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void gst_base_sink_set_sync (GstBaseSink *sink, gboolean sync);
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gboolean gst_base_sink_get_sync (GstBaseSink *sink);
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/* dropping late buffers */
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void gst_base_sink_set_max_lateness (GstBaseSink *sink, gint64 max_lateness);
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gint64 gst_base_sink_get_max_lateness (GstBaseSink *sink);
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/* performing QoS */
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void gst_base_sink_set_qos_enabled (GstBaseSink *sink, gboolean enabled);
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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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void gst_base_sink_set_async_enabled (GstBaseSink *sink, gboolean enabled);
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gboolean gst_base_sink_is_async_enabled (GstBaseSink *sink);
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/* tuning synchronisation */
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void gst_base_sink_set_ts_offset (GstBaseSink *sink, GstClockTimeDiff offset);
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GstClockTimeDiff gst_base_sink_get_ts_offset (GstBaseSink *sink);
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/* last sample */
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GstSample * gst_base_sink_get_last_sample (GstBaseSink *sink);
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void gst_base_sink_set_last_sample_enabled (GstBaseSink *sink, gboolean enabled);
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gboolean gst_base_sink_is_last_sample_enabled (GstBaseSink *sink);
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/* latency */
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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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GstClockTime gst_base_sink_get_latency (GstBaseSink *sink);
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/* render delay */
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void gst_base_sink_set_render_delay (GstBaseSink *sink, GstClockTime delay);
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GstClockTime gst_base_sink_get_render_delay (GstBaseSink *sink);
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/* blocksize */
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void gst_base_sink_set_blocksize (GstBaseSink *sink, guint blocksize);
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guint gst_base_sink_get_blocksize (GstBaseSink *sink);
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/* throttle-time */
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void gst_base_sink_set_throttle_time (GstBaseSink *sink, guint64 throttle);
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guint64 gst_base_sink_get_throttle_time (GstBaseSink *sink);
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GstClockReturn gst_base_sink_wait_clock (GstBaseSink *sink, GstClockTime time,
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GstClockTimeDiff * jitter);
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GstFlowReturn gst_base_sink_wait (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__ */
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