gstreamer/libs/gst/base/gstbasesrc.h

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2005 Wim Taymans <wim@fluendo.com>
*
* gstbasesrc.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_SRC_H__
#define __GST_BASE_SRC_H__
#include <gst/gst.h>
G_BEGIN_DECLS
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#define GST_TYPE_BASE_SRC (gst_base_src_get_type())
#define GST_BASE_SRC(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_SRC,GstBaseSrc))
#define GST_BASE_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_SRC,GstBaseSrcClass))
#define GST_BASE_SRC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BASE_SRC, GstBaseSrcClass))
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#define GST_IS_BASE_SRC(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_SRC))
#define GST_IS_BASE_SRC_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_SRC))
#define GST_BASE_SRC_CAST(obj) ((GstBaseSrc *)(obj))
/**
* GstBaseSrcFlags:
* @GST_BASE_SRC_FLAG_STARTING: has source is starting
* @GST_BASE_SRC_FLAG_STARTED: has source been started
* @GST_BASE_SRC_FLAG_LAST: offset to define more flags
*
* The #GstElement flags that a basesrc element may have.
*/
gst/: More work on the generic source base class, implement seeking, query. Original commit message from CVS: * gst/base/README: * gst/base/gstbasesrc.c: (gst_basesrc_get_type), (gst_basesrc_init), (gst_basesrc_get_formats), (gst_basesrc_query), (gst_basesrc_get_event_mask), (gst_basesrc_do_seek), (gst_basesrc_event_handler), (gst_basesrc_get_range_unlocked), (gst_basesrc_check_get_range), (gst_basesrc_loop), (gst_basesrc_unlock), (gst_basesrc_get_size), (gst_basesrc_start), (gst_basesrc_stop), (gst_basesrc_activate), (gst_basesrc_change_state), (basesrc_find_peek), (basesrc_find_suggest), (gst_basesrc_type_find): * gst/base/gstbasesrc.h: * gst/elements/gstfilesrc.c: (gst_filesrc_base_init), (gst_filesrc_class_init), (gst_filesrc_init), (gst_filesrc_finalize), (gst_filesrc_set_location), (gst_filesrc_set_property), (gst_filesrc_get_property), (gst_filesrc_free_parent_mmap), (gst_filesrc_map_region), (gst_filesrc_map_small_region), (gst_filesrc_create_mmap), (gst_filesrc_create_read), (gst_filesrc_create), (gst_filesrc_get_size), (gst_filesrc_start), (gst_filesrc_stop): * gst/elements/gstfilesrc.h: * gst/gstelement.c: (gst_element_get_state_func), (gst_element_lost_state), (gst_element_pads_activate): * gst/gstpad.c: (gst_pad_set_active), (gst_pad_peer_set_active), (gst_pad_set_checkgetrange_function), (gst_pad_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: More work on the generic source base class, implement seeking, query. Make filesrc extend the base source class. Added gst_pad_set_checkgetrange_function to GstPad.
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typedef enum {
GST_BASE_SRC_FLAG_STARTING = (GST_ELEMENT_FLAG_LAST << 0),
GST_BASE_SRC_FLAG_STARTED = (GST_ELEMENT_FLAG_LAST << 1),
renamed GST_FLAGS macros to GST_OBJECT_FLAGS moved bitshift from macro to enum definition Original commit message from CVS: * check/gst/gstbin.c: (GST_START_TEST): * docs/gst/gstreamer-sections.txt: * gst/base/gstbasesink.c: (gst_base_sink_init): * gst/base/gstbasesrc.c: (gst_base_src_init), (gst_base_src_get_range), (gst_base_src_check_get_range), (gst_base_src_start), (gst_base_src_stop): * gst/base/gstbasesrc.h: * gst/elements/gstfakesrc.c: (gst_fake_src_set_property): * gst/gstbin.c: (gst_bin_add_func), (gst_bin_remove_func), (bin_element_is_sink), (reset_degree), (gst_bin_element_set_state), (bin_bus_handler): * gst/gstbin.h: * gst/gstbuffer.h: * gst/gstbus.c: (gst_bus_post), (gst_bus_set_flushing): * gst/gstbus.h: * gst/gstelement.c: (gst_element_is_locked_state), (gst_element_set_locked_state), (gst_element_commit_state), (gst_element_set_state): * gst/gstelement.h: * gst/gstindex.c: (gst_index_init): * gst/gstindex.h: * gst/gstminiobject.h: * gst/gstobject.c: (gst_object_init), (gst_object_sink), (gst_object_set_parent): * gst/gstobject.h: * gst/gstpad.c: (gst_pad_set_blocked_async), (gst_pad_is_blocked), (gst_pad_get_caps_unlocked), (gst_pad_set_caps): * gst/gstpad.h: * gst/gstpadtemplate.h: * gst/gstpipeline.c: (gst_pipeline_provide_clock_func), (gst_pipeline_use_clock), (gst_pipeline_auto_clock): * gst/gstpipeline.h: * gst/indexers/gstfileindex.c: (gst_file_index_load), (gst_file_index_commit): * testsuite/bytestream/filepadsink.c: (gst_fp_sink_init): * testsuite/pad/link.c: (gst_test_src_init), (gst_test_filter_init), (gst_test_sink_init): * testsuite/states/locked.c: (main): renamed GST_FLAGS macros to GST_OBJECT_FLAGS moved bitshift from macro to enum definition
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/* padding */
GST_BASE_SRC_FLAG_LAST = (GST_ELEMENT_FLAG_LAST << 6)
} GstBaseSrcFlags;
gst/: More work on the generic source base class, implement seeking, query. Original commit message from CVS: * gst/base/README: * gst/base/gstbasesrc.c: (gst_basesrc_get_type), (gst_basesrc_init), (gst_basesrc_get_formats), (gst_basesrc_query), (gst_basesrc_get_event_mask), (gst_basesrc_do_seek), (gst_basesrc_event_handler), (gst_basesrc_get_range_unlocked), (gst_basesrc_check_get_range), (gst_basesrc_loop), (gst_basesrc_unlock), (gst_basesrc_get_size), (gst_basesrc_start), (gst_basesrc_stop), (gst_basesrc_activate), (gst_basesrc_change_state), (basesrc_find_peek), (basesrc_find_suggest), (gst_basesrc_type_find): * gst/base/gstbasesrc.h: * gst/elements/gstfilesrc.c: (gst_filesrc_base_init), (gst_filesrc_class_init), (gst_filesrc_init), (gst_filesrc_finalize), (gst_filesrc_set_location), (gst_filesrc_set_property), (gst_filesrc_get_property), (gst_filesrc_free_parent_mmap), (gst_filesrc_map_region), (gst_filesrc_map_small_region), (gst_filesrc_create_mmap), (gst_filesrc_create_read), (gst_filesrc_create), (gst_filesrc_get_size), (gst_filesrc_start), (gst_filesrc_stop): * gst/elements/gstfilesrc.h: * gst/gstelement.c: (gst_element_get_state_func), (gst_element_lost_state), (gst_element_pads_activate): * gst/gstpad.c: (gst_pad_set_active), (gst_pad_peer_set_active), (gst_pad_set_checkgetrange_function), (gst_pad_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: More work on the generic source base class, implement seeking, query. Make filesrc extend the base source class. Added gst_pad_set_checkgetrange_function to GstPad.
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#define GST_BASE_SRC_IS_STARTING(obj) GST_OBJECT_FLAG_IS_SET ((obj), GST_BASE_SRC_FLAG_STARTING)
#define GST_BASE_SRC_IS_STARTED(obj) GST_OBJECT_FLAG_IS_SET ((obj), GST_BASE_SRC_FLAG_STARTED)
typedef struct _GstBaseSrc GstBaseSrc;
typedef struct _GstBaseSrcClass GstBaseSrcClass;
typedef struct _GstBaseSrcPrivate GstBaseSrcPrivate;
/**
* GST_BASE_SRC_PAD:
* @obj: base source instance
*
* Gives the pointer to the #GstPad object of the element.
*/
#define GST_BASE_SRC_PAD(obj) (GST_BASE_SRC_CAST (obj)->srcpad)
/**
* GstBaseSrc:
*
* The opaque #GstBaseSrc data structure.
*/
struct _GstBaseSrc {
GstElement element;
/*< protected >*/
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GstPad *srcpad;
/* available to subclass implementations */
/* MT-protected (with LIVE_LOCK) */
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GMutex live_lock;
GCond live_cond;
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gboolean is_live;
gboolean live_running;
/* MT-protected (with LOCK) */
guint blocksize; /* size of buffers when operating push based */
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gboolean can_activate_push; /* some scheduling properties */
gboolean random_access;
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GstClockID clock_id; /* for syncing */
/* MT-protected (with STREAM_LOCK *and* OBJECT_LOCK) */
GstSegment segment;
/* MT-protected (with STREAM_LOCK) */
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gboolean need_newsegment;
gint num_buffers;
gint num_buffers_left;
#ifndef GST_REMOVE_DEPRECATED
gboolean typefind; /* unused */
#endif
gboolean running;
GstEvent *pending_seek;
GstBaseSrcPrivate *priv;
/*< private >*/
gpointer _gst_reserved[GST_PADDING_LARGE];
};
/**
* GstBaseSrcClass:
* @parent_class: Element parent class
* @get_caps: Called to get the caps to report
* @negotiate: Negotiated the caps with the peer.
* @fixate: Called during negotiation if caps need fixating. Implement instead of
* setting a fixate function on the source pad.
* @set_caps: Notify subclass of changed output caps
* @decide_allocation: configure the allocation query
* @start: Start processing. Subclasses should open resources and prepare
* to produce data. Implementation should call gst_base_src_start_complete()
* when the operation completes, either from the current thread or any other
* thread that finishes the start operation asynchronously.
* @stop: Stop processing. Subclasses should use this to close resources.
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* @get_times: Given a buffer, return the start and stop time when it
* should be pushed out. The base class will sync on the clock using
* these times.
* @get_size: Return the total size of the resource, in the format set by
* gst_base_src_set_format().
* @is_seekable: Check if the source can seek
* @prepare_seek_segment: Prepare the #GstSegment that will be passed to the
* #GstBaseSrcClass.do_seek() vmethod for executing a seek
* request. Sub-classes should override this if they support seeking in
* formats other than the configured native format. By default, it tries to
* convert the seek arguments to the configured native format and prepare a
* segment in that format.
* @do_seek: Perform seeking on the resource to the indicated segment.
* @unlock: Unlock any pending access to the resource. Subclasses should unblock
* any blocked function ASAP. In particular, any create() function in
* progress should be unblocked and should return GST_FLOW_FLUSHING. Any
* future #GstBaseSrcClass.create() function call should also return
* GST_FLOW_FLUSHING until the #GstBaseSrcClass.unlock_stop() function has
* been called.
* @unlock_stop: Clear the previous unlock request. Subclasses should clear any
* state they set during #GstBaseSrcClass.unlock(), such as clearing command
* queues.
* @query: Handle a requested query.
* @event: Override this to implement custom event handling.
* @create: Ask the subclass to create a buffer with offset and size. When the
* subclass returns GST_FLOW_OK, it MUST return a buffer of the requested size
* unless fewer bytes are available because an EOS condition is near. No
* buffer should be returned when the return value is different from
* GST_FLOW_OK. A return value of GST_FLOW_EOS signifies that the end of
* stream is reached. The default implementation will call
* #GstBaseSrcClass.alloc() and then call #GstBaseSrcClass.fill().
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* @alloc: Ask the subclass to allocate a buffer with for offset and size. The
* default implementation will create a new buffer from the negotiated allocator.
* @fill: Ask the subclass to fill the buffer with data for offset and size. The
* passed buffer is guaranteed to hold the requested amount of bytes.
*
* Subclasses can override any of the available virtual methods or not, as
* needed. At the minimum, the @create method should be overridden to produce
* buffers.
*/
struct _GstBaseSrcClass {
GstElementClass parent_class;
/*< public >*/
/* virtual methods for subclasses */
/* get caps from subclass */
GstCaps* (*get_caps) (GstBaseSrc *src, GstCaps *filter);
/* decide on caps */
gboolean (*negotiate) (GstBaseSrc *src);
/* called if, in negotiation, caps need fixating */
GstCaps * (*fixate) (GstBaseSrc *src, GstCaps *caps);
/* notify the subclass of new caps */
gboolean (*set_caps) (GstBaseSrc *src, GstCaps *caps);
/* setup allocation query */
gboolean (*decide_allocation) (GstBaseSrc *src, GstQuery *query);
/* start and stop processing, ideal for opening/closing the resource */
gboolean (*start) (GstBaseSrc *src);
gboolean (*stop) (GstBaseSrc *src);
/* given a buffer, return start and stop time when it should be pushed
* out. The base class will sync on the clock using these times. */
void (*get_times) (GstBaseSrc *src, GstBuffer *buffer,
GstClockTime *start, GstClockTime *end);
/* get the total size of the resource in the format set by
* gst_base_src_set_format() */
gst/: More work on the generic source base class, implement seeking, query. Original commit message from CVS: * gst/base/README: * gst/base/gstbasesrc.c: (gst_basesrc_get_type), (gst_basesrc_init), (gst_basesrc_get_formats), (gst_basesrc_query), (gst_basesrc_get_event_mask), (gst_basesrc_do_seek), (gst_basesrc_event_handler), (gst_basesrc_get_range_unlocked), (gst_basesrc_check_get_range), (gst_basesrc_loop), (gst_basesrc_unlock), (gst_basesrc_get_size), (gst_basesrc_start), (gst_basesrc_stop), (gst_basesrc_activate), (gst_basesrc_change_state), (basesrc_find_peek), (basesrc_find_suggest), (gst_basesrc_type_find): * gst/base/gstbasesrc.h: * gst/elements/gstfilesrc.c: (gst_filesrc_base_init), (gst_filesrc_class_init), (gst_filesrc_init), (gst_filesrc_finalize), (gst_filesrc_set_location), (gst_filesrc_set_property), (gst_filesrc_get_property), (gst_filesrc_free_parent_mmap), (gst_filesrc_map_region), (gst_filesrc_map_small_region), (gst_filesrc_create_mmap), (gst_filesrc_create_read), (gst_filesrc_create), (gst_filesrc_get_size), (gst_filesrc_start), (gst_filesrc_stop): * gst/elements/gstfilesrc.h: * gst/gstelement.c: (gst_element_get_state_func), (gst_element_lost_state), (gst_element_pads_activate): * gst/gstpad.c: (gst_pad_set_active), (gst_pad_peer_set_active), (gst_pad_set_checkgetrange_function), (gst_pad_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: More work on the generic source base class, implement seeking, query. Make filesrc extend the base source class. Added gst_pad_set_checkgetrange_function to GstPad.
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gboolean (*get_size) (GstBaseSrc *src, guint64 *size);
/* check if the resource is seekable */
gst/: More work on the generic source base class, implement seeking, query. Original commit message from CVS: * gst/base/README: * gst/base/gstbasesrc.c: (gst_basesrc_get_type), (gst_basesrc_init), (gst_basesrc_get_formats), (gst_basesrc_query), (gst_basesrc_get_event_mask), (gst_basesrc_do_seek), (gst_basesrc_event_handler), (gst_basesrc_get_range_unlocked), (gst_basesrc_check_get_range), (gst_basesrc_loop), (gst_basesrc_unlock), (gst_basesrc_get_size), (gst_basesrc_start), (gst_basesrc_stop), (gst_basesrc_activate), (gst_basesrc_change_state), (basesrc_find_peek), (basesrc_find_suggest), (gst_basesrc_type_find): * gst/base/gstbasesrc.h: * gst/elements/gstfilesrc.c: (gst_filesrc_base_init), (gst_filesrc_class_init), (gst_filesrc_init), (gst_filesrc_finalize), (gst_filesrc_set_location), (gst_filesrc_set_property), (gst_filesrc_get_property), (gst_filesrc_free_parent_mmap), (gst_filesrc_map_region), (gst_filesrc_map_small_region), (gst_filesrc_create_mmap), (gst_filesrc_create_read), (gst_filesrc_create), (gst_filesrc_get_size), (gst_filesrc_start), (gst_filesrc_stop): * gst/elements/gstfilesrc.h: * gst/gstelement.c: (gst_element_get_state_func), (gst_element_lost_state), (gst_element_pads_activate): * gst/gstpad.c: (gst_pad_set_active), (gst_pad_peer_set_active), (gst_pad_set_checkgetrange_function), (gst_pad_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: More work on the generic source base class, implement seeking, query. Make filesrc extend the base source class. Added gst_pad_set_checkgetrange_function to GstPad.
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gboolean (*is_seekable) (GstBaseSrc *src);
/* Prepare the segment on which to perform do_seek(), converting to the
* current basesrc format. */
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gboolean (*prepare_seek_segment) (GstBaseSrc *src, GstEvent *seek,
GstSegment *segment);
/* notify subclasses of a seek */
gboolean (*do_seek) (GstBaseSrc *src, GstSegment *segment);
/* unlock any pending access to the resource. subclasses should unlock
* any function ASAP. */
gboolean (*unlock) (GstBaseSrc *src);
/* Clear any pending unlock request, as we succeeded in unlocking */
gboolean (*unlock_stop) (GstBaseSrc *src);
/* notify subclasses of a query */
gboolean (*query) (GstBaseSrc *src, GstQuery *query);
/* notify subclasses of an event */
gboolean (*event) (GstBaseSrc *src, GstEvent *event);
/* ask the subclass to create a buffer with offset and size, the default
* implementation will call alloc and fill. */
GstFlowReturn (*create) (GstBaseSrc *src, guint64 offset, guint size,
GstBuffer **buf);
/* ask the subclass to allocate an output buffer. The default implementation
* will use the negotiated allocator. */
GstFlowReturn (*alloc) (GstBaseSrc *src, guint64 offset, guint size,
GstBuffer **buf);
/* ask the subclass to fill the buffer with data from offset and size */
GstFlowReturn (*fill) (GstBaseSrc *src, guint64 offset, guint size,
GstBuffer *buf);
/*< private >*/
gpointer _gst_reserved[GST_PADDING_LARGE];
};
GST_EXPORT
GType gst_base_src_get_type (void);
GST_EXPORT
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GstFlowReturn gst_base_src_wait_playing (GstBaseSrc *src);
GST_EXPORT
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void gst_base_src_set_live (GstBaseSrc *src, gboolean live);
GST_EXPORT
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gboolean gst_base_src_is_live (GstBaseSrc *src);
GST_EXPORT
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void gst_base_src_set_format (GstBaseSrc *src, GstFormat format);
GST_EXPORT
void gst_base_src_set_dynamic_size (GstBaseSrc * src, gboolean dynamic);
GST_EXPORT
void gst_base_src_set_automatic_eos (GstBaseSrc * src, gboolean automatic_eos);
GST_EXPORT
void gst_base_src_set_async (GstBaseSrc *src, gboolean async);
GST_EXPORT
gboolean gst_base_src_is_async (GstBaseSrc *src);
GST_EXPORT
void gst_base_src_start_complete (GstBaseSrc * basesrc, GstFlowReturn ret);
GST_EXPORT
GstFlowReturn gst_base_src_start_wait (GstBaseSrc * basesrc);
GST_EXPORT
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gboolean gst_base_src_query_latency (GstBaseSrc *src, gboolean * live,
GstClockTime * min_latency,
GstClockTime * max_latency);
GST_EXPORT
void gst_base_src_set_blocksize (GstBaseSrc *src, guint blocksize);
GST_EXPORT
guint gst_base_src_get_blocksize (GstBaseSrc *src);
docs/design/part-negotiation.txt: Small doc update. Original commit message from CVS: * docs/design/part-negotiation.txt: Small doc update. * docs/libs/gstreamer-libs-sections.txt: * libs/gst/base/gstbasesink.c: (gst_base_sink_class_init), (gst_base_sink_pad_getcaps), (gst_base_sink_pad_setcaps), (gst_base_sink_init), (gst_base_sink_set_blocksize), (gst_base_sink_get_blocksize), (gst_base_sink_set_property), (gst_base_sink_get_property), (gst_base_sink_needs_preroll), (gst_base_sink_loop), (gst_base_sink_pad_activate), (gst_base_sink_negotiate_pull), (gst_base_sink_pad_activate_pull), (gst_base_sink_change_state): * libs/gst/base/gstbasesink.h: Add blocksize property and methods to control the amount of data to pull. Negotiate first before activating upstream in pull mode so that they can negotiate themselves. When we operate in pull mode, we only accept the caps that we negotiated. Make the sink go ASYNC to PAUSED, like all other sinks. API: GstBaseSink::gst_base_sink_set_blocksize() API: GstBaseSink::gst_base_sink_get_blocksize() API: GstBaseSink::blocksize * libs/gst/base/gstbasesrc.c: (gst_base_src_wait_playing), (gst_base_src_set_live), (gst_base_src_is_live), (gst_base_src_set_format), (gst_base_src_query_latency), (gst_base_src_set_blocksize), (gst_base_src_get_blocksize), (gst_base_src_set_do_timestamp), (gst_base_src_get_do_timestamp), (gst_base_src_set_property), (gst_base_src_get_property): * libs/gst/base/gstbasesrc.h: Add typechecking in public API functions. Add methods to control the blocksize in subclasses. API: GstBaseSrc::gst_base_src_set_blocksize() API: GstBaseSrc::gst_base_src_get_blocksize()
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GST_EXPORT
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void gst_base_src_set_do_timestamp (GstBaseSrc *src, gboolean timestamp);
GST_EXPORT
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gboolean gst_base_src_get_do_timestamp (GstBaseSrc *src);
GST_EXPORT
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gboolean gst_base_src_new_seamless_segment (GstBaseSrc *src, gint64 start, gint64 stop, gint64 time);
GST_EXPORT
gboolean gst_base_src_set_caps (GstBaseSrc *src, GstCaps *caps);
GST_EXPORT
GstBufferPool * gst_base_src_get_buffer_pool (GstBaseSrc *src);
GST_EXPORT
void gst_base_src_get_allocator (GstBaseSrc *src,
GstAllocator **allocator,
GstAllocationParams *params);
#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstBaseSrc, gst_object_unref)
#endif
G_END_DECLS
#endif /* __GST_BASE_SRC_H__ */