/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * * 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ #ifndef __GST_BASE_SINK_H__ #define __GST_BASE_SINK_H__ #include 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_WAIT_UNTIL(pad, end_time) \ g_cond_wait_until (GST_BASE_SINK_GET_PREROLL_COND (pad), GST_BASE_SINK_GET_PREROLL_LOCK (pad), end_time) #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; GstPadMode 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; gboolean eos; gboolean need_preroll; gboolean have_preroll; gboolean playing_async; /*< protected >*/ /* with STREAM_LOCK */ gboolean have_newsegment; GstSegment segment; /*< private >*/ /* with LOCK */ GstClockID clock_id; 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 * @fixate: Only useful in pull mode. Implement if you have * ideas about what should be the default values for the caps you support. * @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. * @get_times: Called to get the start and end times for synchronising * the passed buffer to the clock * @propose_allocation: configure the allocation query * @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. * @query: perform a #GstQuery on the element. * @event: Override this to handle events arriving on the sink pad * @wait_event: Override this to implement custom logic to wait for the event * time (for events like EOS and GAP). Subclasses should always first * chain up to the default implementation. * @prepare: Called to prepare the buffer for @render and @preroll. This * function is called before synchronisation is performed. * @prepare_list: Called to prepare the buffer list for @render_list. This * function is called before synchronisation is performed. * @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. * * 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, GstCaps *filter); /* notify subclass of new caps */ gboolean (*set_caps) (GstBaseSink *sink, GstCaps *caps); /* fixate sink caps during pull-mode negotiation */ GstCaps * (*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); /* propose allocation parameters for upstream */ gboolean (*propose_allocation) (GstBaseSink *sink, GstQuery *query); /* 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 query */ gboolean (*query) (GstBaseSink *sink, GstQuery *query); /* notify subclass of event */ gboolean (*event) (GstBaseSink *sink, GstEvent *event); /* wait for eos or gap, subclasses should chain up to parent first */ GstFlowReturn (*wait_event) (GstBaseSink *sink, GstEvent *event); /* notify subclass of buffer or list before doing sync */ GstFlowReturn (*prepare) (GstBaseSink *sink, GstBuffer *buffer); GstFlowReturn (*prepare_list) (GstBaseSink *sink, GstBufferList *buffer_list); /* notify subclass of preroll buffer or real buffer */ 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 sample */ GstSample * gst_base_sink_get_last_sample (GstBaseSink *sink); void gst_base_sink_set_last_sample_enabled (GstBaseSink *sink, gboolean enabled); gboolean gst_base_sink_is_last_sample_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); /* max-bitrate */ void gst_base_sink_set_max_bitrate (GstBaseSink *sink, guint64 max_bitrate); guint64 gst_base_sink_get_max_bitrate (GstBaseSink *sink); GstClockReturn gst_base_sink_wait_clock (GstBaseSink *sink, GstClockTime time, GstClockTimeDiff * jitter); GstFlowReturn gst_base_sink_wait (GstBaseSink *sink, GstClockTime time, GstClockTimeDiff *jitter); G_END_DECLS #endif /* __GST_BASE_SINK_H__ */