gstreamer/libs/gst/base/gstbasetransform.h

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gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
2005-03-29 16:18:12 +00:00
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2005 Wim Taymans <wim@fluendo.com>
*
* 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_TRANSFORM_H__
#define __GST_BASE_TRANSFORM_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_BASE_TRANSFORM (gst_base_transform_get_type())
#define GST_BASE_TRANSFORM(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_TRANSFORM,GstBaseTransform))
#define GST_BASE_TRANSFORM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_TRANSFORM,GstBaseTransformClass))
#define GST_BASE_TRANSFORM_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_BASE_TRANSFORM,GstBaseTransformClass))
#define GST_IS_BASE_TRANSFORM(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_TRANSFORM))
#define GST_IS_BASE_TRANSFORM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_TRANSFORM))
/* since 0.10.4 */
#define GST_BASE_TRANSFORM_CAST(obj) ((GstBaseTransform *)(obj))
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
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/**
* GST_BASE_TRANSFORM_SINK_NAME:
*
* The name of the templates for the sink pad.
*/
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
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#define GST_BASE_TRANSFORM_SINK_NAME "sink"
/**
* GST_BASE_TRANSFORM_SRC_NAME:
*
* The name of the templates for the source pad.
*/
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
2005-03-29 16:18:12 +00:00
#define GST_BASE_TRANSFORM_SRC_NAME "src"
/**
* GST_BASE_TRANSFORM_SRC_PAD:
* @obj: base transform instance
*
* Gives the pointer to the source #GstPad object of the element.
*
* Since: 0.10.4
*/
#define GST_BASE_TRANSFORM_SRC_PAD(obj) (GST_BASE_TRANSFORM_CAST (obj)->srcpad)
/**
* GST_BASE_TRANSFORM_SINK_PAD:
* @obj: base transform instance
*
* Gives the pointer to the sink #GstPad object of the element.
*
* Since: 0.10.4
*/
#define GST_BASE_TRANSFORM_SINK_PAD(obj) (GST_BASE_TRANSFORM_CAST (obj)->sinkpad)
/**
* GST_BASE_TRANSFORM_FLOW_DROPPED:
*
* A #GstFlowReturn that can be returned from transform and transform_ip to
* indicate that no output buffer was generated.
*
* Since: 0.10.13
*/
#define GST_BASE_TRANSFORM_FLOW_DROPPED GST_FLOW_CUSTOM_SUCCESS
/**
* GST_BASE_TRANSFORM_LOCK:
* @obj: base transform instance
*
* Obtain a lock to protect the transform function from concurrent access.
*
* Since: 0.10.13
*/
#define GST_BASE_TRANSFORM_LOCK(obj) g_mutex_lock (GST_BASE_TRANSFORM_CAST (obj)->transform_lock)
/**
* GST_BASE_TRANSFORM_UNLOCK:
* @obj: base transform instance
*
* Release the lock that protects the transform function from concurrent access.
*
* Since: 0.10.13
*/
#define GST_BASE_TRANSFORM_UNLOCK(obj) g_mutex_unlock (GST_BASE_TRANSFORM_CAST (obj)->transform_lock)
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
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typedef struct _GstBaseTransform GstBaseTransform;
typedef struct _GstBaseTransformClass GstBaseTransformClass;
typedef struct _GstBaseTransformPrivate GstBaseTransformPrivate;
/**
* GstBaseTransform:
*
* The opaque #GstBaseTransform data structure.
*/
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
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struct _GstBaseTransform {
GstElement element;
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
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/*< protected >*/
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
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/* source and sink pads */
GstPad *sinkpad;
GstPad *srcpad;
check/elements/identity.c: Make the error a little clearer when the test fails because identity made a copy of the bu... Original commit message from CVS: * check/elements/identity.c: (GST_START_TEST): Make the error a little clearer when the test fails because identity made a copy of the buffer. * docs/gst/gstreamer-sections.txt: New symbols in gstbasetransform.h * gst/base/gstbasetransform.c: (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_transform_size), (gst_base_transform_configure_caps), (gst_base_transform_setcaps), (gst_base_transform_default_prepare_buf), (gst_base_transform_get_unit_size), (gst_base_transform_buffer_alloc), (gst_base_transform_handle_buffer), (gst_base_transform_chain), (gst_base_transform_change_state), (gst_base_transform_set_passthrough), (gst_base_transform_set_in_place), (gst_base_transform_is_in_place): * gst/base/gstbasetransform.h: Change BaseTransform to separate in_place operate from same_caps output. in_place implies that the element can perform the transform on incoming buffers in-place, even if the caps on the output are different. Sub-class elements can now implement special buffer allocation methods for outgoing buffers if they wish to. Big documentation addition. * gst/elements/gstcapsfilter.c: (gst_capsfilter_transform_ip): * gst/elements/gstelements.c: Changes for basetransform modifications. * gst/elements/Makefile.am: * gst/elements/gstfdsrc.c: (gst_fdsrc_init), (gst_fdsrc_create): Compile fix. Extra debug output.
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/* Set by sub-class */
gboolean passthrough;
check/elements/identity.c: Make the error a little clearer when the test fails because identity made a copy of the bu... Original commit message from CVS: * check/elements/identity.c: (GST_START_TEST): Make the error a little clearer when the test fails because identity made a copy of the buffer. * docs/gst/gstreamer-sections.txt: New symbols in gstbasetransform.h * gst/base/gstbasetransform.c: (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_transform_size), (gst_base_transform_configure_caps), (gst_base_transform_setcaps), (gst_base_transform_default_prepare_buf), (gst_base_transform_get_unit_size), (gst_base_transform_buffer_alloc), (gst_base_transform_handle_buffer), (gst_base_transform_chain), (gst_base_transform_change_state), (gst_base_transform_set_passthrough), (gst_base_transform_set_in_place), (gst_base_transform_is_in_place): * gst/base/gstbasetransform.h: Change BaseTransform to separate in_place operate from same_caps output. in_place implies that the element can perform the transform on incoming buffers in-place, even if the caps on the output are different. Sub-class elements can now implement special buffer allocation methods for outgoing buffers if they wish to. Big documentation addition. * gst/elements/gstcapsfilter.c: (gst_capsfilter_transform_ip): * gst/elements/gstelements.c: Changes for basetransform modifications. * gst/elements/Makefile.am: * gst/elements/gstfdsrc.c: (gst_fdsrc_init), (gst_fdsrc_create): Compile fix. Extra debug output.
2005-09-09 17:42:20 +00:00
gboolean always_in_place;
GstCaps *cache_caps1;
gsize cache_caps1_size;
GstCaps *cache_caps2;
gsize cache_caps2_size;
gboolean have_same_caps;
gboolean delay_configure;
gboolean pending_configure;
gboolean negotiated;
gboolean have_newsegment;
/* MT-protected (with STREAM_LOCK) */
GstSegment segment;
GMutex *transform_lock;
/*< private >*/
GstBaseTransformPrivate *priv;
gpointer _gst_reserved[GST_PADDING_LARGE];
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
2005-03-29 16:18:12 +00:00
};
/**
* GstBaseTransformClass:
* @parent_class: Element parent class
* @transform_caps: Optional. Given the pad in this direction and the given
* caps, what caps are allowed on the other pad in this
* element ?
* @fixate_caps: Optional. Given the pad in this direction and the given
* caps, fixate the caps on the other pad.
* @transform_size: Optional. Given the size of a buffer in the given direction
* with the given caps, calculate the size in bytes of a buffer
* on the other pad with the given other caps.
* The default implementation uses get_unit_size and keeps
* the number of units the same.
* @get_unit_size: Required if the transform is not in-place.
* get the size in bytes of one unit for the given caps.
* @set_caps: allows the subclass to be notified of the actual caps set.
* @start: Optional.
* Called when the element starts processing.
* Allows opening external resources.
* @stop: Optional.
* Called when the element stops processing.
* Allows closing external resources.
* @transform: Required if the element does not operate in-place.
* Transforms one incoming buffer to one outgoing buffer.
* The function is allowed to change size/timestamp/duration
* of the outgoing buffer.
* @transform_ip: Required if the element operates in-place.
* Transform the incoming buffer in-place.
* @event: Optional.
* Event handler on the sink pad. This function should return
* TRUE if the base class should forward the event.
* @src_event: Optional.
* Event handler on the source pad.
* @passthrough_on_same_caps: If set to TRUE, passthrough mode will be
* automatically enabled if the caps are the same.
* @prepare_output_buffer: Optional.
* Subclasses can override this to do their own
* allocation of output buffers. Elements that only do
* analysis can return a subbuffer or even just
* increment the reference to the input buffer (if in
* passthrough mode)
* @before_transform: Optional. Since 0.10.22
* This method is called right before the base class will
* start processing. Dynamic properties or other delayed
* configuration could be performed in this method.
* @accept_caps: Optional. Since 0.10.30
* Subclasses can override this method to check if @caps can be
* handled by the element. The default implementation might not be
* the most optimal way to check this in all cases.
*
* Subclasses can override any of the available virtual methods or not, as
* needed. At minimum either @transform or @transform_ip need to be overridden.
* If the element can overwrite the input data with the results (data is of the
* same type and quantity) it should provide @transform_ip.
*/
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
2005-03-29 16:18:12 +00:00
struct _GstBaseTransformClass {
GstElementClass parent_class;
/*< public >*/
gboolean passthrough_on_same_caps;
/* virtual methods for subclasses */
GstCaps* (*transform_caps) (GstBaseTransform *trans,
GstPadDirection direction,
tests/network-clock.scm: Commentary update. Original commit message from CVS: 2005-07-01 Andy Wingo <wingo@pobox.com> * tests/network-clock.scm: Commentary update. * gst/elements/gstidentity.c (PROP_DUPLICATE): Gone daddy gone. Didn't really make sense, not implementable with basetransform, etc. (gst_identity_transform): Unref inbuf via make_writable. Feeble attempt at implementing the sync property, needs an unlock method. * gst/base/gstbasetransform.c (gst_base_transform_transform_caps): New func, by default returns the same caps (the identity transformation). (gst_base_transform_getcaps): Uses transform_caps to return something sensible. (gst_base_transform_setcaps): Complicated logic to get caps on both pads, even if they are different, and to call set_caps once for every time both pads get their caps set. (gst_base_transform_handle_buffer): Give the ref to the transform function. Allows in-place modification of the buffer. * gst/base/gstbasetransform.h (transform_caps): New class method. Given caps on one side, what can I do on the other. (set_caps): Take two caps, one for each side of the element. * gst/gstpad.h: * gst/gstpad.c (gst_pad_fixate_caps): Change prototype to modify caps in place. This is safe because we can check the mutability of the caps, and a good idea because fixate functions are just called as a matter of last resort. (Not actually implemented.) (gst_pad_set_caps): If the caps we're setting is actually the same as the existing pad caps, just update the pointer without calling setcaps. Assert that caps is either NULL or fixed, as per the docs. * gst/gstghostpad.c: Update for fixate changes.
2005-07-01 16:46:59 +00:00
GstCaps *caps);
void (*fixate_caps) (GstBaseTransform *trans,
GstPadDirection direction, GstCaps *caps,
GstCaps *othercaps);
gboolean (*accept_caps) (GstBaseTransform *trans, GstPadDirection direction,
GstCaps *caps);
gboolean (*set_caps) (GstBaseTransform *trans, GstCaps *incaps,
GstCaps *outcaps);
gboolean (*transform_size) (GstBaseTransform *trans,
GstPadDirection direction,
GstCaps *caps, gsize size,
GstCaps *othercaps, gsize *othersize);
gboolean (*get_unit_size) (GstBaseTransform *trans, GstCaps *caps,
gsize *size);
gboolean (*start) (GstBaseTransform *trans);
gboolean (*stop) (GstBaseTransform *trans);
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
2005-03-29 16:18:12 +00:00
gboolean (*event) (GstBaseTransform *trans, GstEvent *event);
/* src event */
gboolean (*src_event) (GstBaseTransform *trans, GstEvent *event);
check/elements/identity.c: Make the error a little clearer when the test fails because identity made a copy of the bu... Original commit message from CVS: * check/elements/identity.c: (GST_START_TEST): Make the error a little clearer when the test fails because identity made a copy of the buffer. * docs/gst/gstreamer-sections.txt: New symbols in gstbasetransform.h * gst/base/gstbasetransform.c: (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_transform_size), (gst_base_transform_configure_caps), (gst_base_transform_setcaps), (gst_base_transform_default_prepare_buf), (gst_base_transform_get_unit_size), (gst_base_transform_buffer_alloc), (gst_base_transform_handle_buffer), (gst_base_transform_chain), (gst_base_transform_change_state), (gst_base_transform_set_passthrough), (gst_base_transform_set_in_place), (gst_base_transform_is_in_place): * gst/base/gstbasetransform.h: Change BaseTransform to separate in_place operate from same_caps output. in_place implies that the element can perform the transform on incoming buffers in-place, even if the caps on the output are different. Sub-class elements can now implement special buffer allocation methods for outgoing buffers if they wish to. Big documentation addition. * gst/elements/gstcapsfilter.c: (gst_capsfilter_transform_ip): * gst/elements/gstelements.c: Changes for basetransform modifications. * gst/elements/Makefile.am: * gst/elements/gstfdsrc.c: (gst_fdsrc_init), (gst_fdsrc_create): Compile fix. Extra debug output.
2005-09-09 17:42:20 +00:00
GstFlowReturn (*prepare_output_buffer) (GstBaseTransform * trans,
check/elements/identity.c: Make the error a little clearer when the test fails because identity made a copy of the bu... Original commit message from CVS: * check/elements/identity.c: (GST_START_TEST): Make the error a little clearer when the test fails because identity made a copy of the buffer. * docs/gst/gstreamer-sections.txt: New symbols in gstbasetransform.h * gst/base/gstbasetransform.c: (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_transform_size), (gst_base_transform_configure_caps), (gst_base_transform_setcaps), (gst_base_transform_default_prepare_buf), (gst_base_transform_get_unit_size), (gst_base_transform_buffer_alloc), (gst_base_transform_handle_buffer), (gst_base_transform_chain), (gst_base_transform_change_state), (gst_base_transform_set_passthrough), (gst_base_transform_set_in_place), (gst_base_transform_is_in_place): * gst/base/gstbasetransform.h: Change BaseTransform to separate in_place operate from same_caps output. in_place implies that the element can perform the transform on incoming buffers in-place, even if the caps on the output are different. Sub-class elements can now implement special buffer allocation methods for outgoing buffers if they wish to. Big documentation addition. * gst/elements/gstcapsfilter.c: (gst_capsfilter_transform_ip): * gst/elements/gstelements.c: Changes for basetransform modifications. * gst/elements/Makefile.am: * gst/elements/gstfdsrc.c: (gst_fdsrc_init), (gst_fdsrc_create): Compile fix. Extra debug output.
2005-09-09 17:42:20 +00:00
GstBuffer *input, gint size, GstCaps *caps, GstBuffer **buf);
void (*before_transform) (GstBaseTransform *trans, GstBuffer *buffer);
GstFlowReturn (*transform) (GstBaseTransform *trans, GstBuffer *inbuf,
GstBuffer *outbuf);
GstFlowReturn (*transform_ip) (GstBaseTransform *trans, GstBuffer *buf);
/*< private >*/
gpointer _gst_reserved[GST_PADDING_LARGE];
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
2005-03-29 16:18:12 +00:00
};
GType gst_base_transform_get_type (void);
void gst_base_transform_set_passthrough (GstBaseTransform *trans,
gboolean passthrough);
gboolean gst_base_transform_is_passthrough (GstBaseTransform *trans);
void gst_base_transform_set_in_place (GstBaseTransform *trans,
gboolean in_place);
gboolean gst_base_transform_is_in_place (GstBaseTransform *trans);
check/elements/identity.c: Make the error a little clearer when the test fails because identity made a copy of the bu... Original commit message from CVS: * check/elements/identity.c: (GST_START_TEST): Make the error a little clearer when the test fails because identity made a copy of the buffer. * docs/gst/gstreamer-sections.txt: New symbols in gstbasetransform.h * gst/base/gstbasetransform.c: (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_transform_size), (gst_base_transform_configure_caps), (gst_base_transform_setcaps), (gst_base_transform_default_prepare_buf), (gst_base_transform_get_unit_size), (gst_base_transform_buffer_alloc), (gst_base_transform_handle_buffer), (gst_base_transform_chain), (gst_base_transform_change_state), (gst_base_transform_set_passthrough), (gst_base_transform_set_in_place), (gst_base_transform_is_in_place): * gst/base/gstbasetransform.h: Change BaseTransform to separate in_place operate from same_caps output. in_place implies that the element can perform the transform on incoming buffers in-place, even if the caps on the output are different. Sub-class elements can now implement special buffer allocation methods for outgoing buffers if they wish to. Big documentation addition. * gst/elements/gstcapsfilter.c: (gst_capsfilter_transform_ip): * gst/elements/gstelements.c: Changes for basetransform modifications. * gst/elements/Makefile.am: * gst/elements/gstfdsrc.c: (gst_fdsrc_init), (gst_fdsrc_create): Compile fix. Extra debug output.
2005-09-09 17:42:20 +00:00
void gst_base_transform_update_qos (GstBaseTransform *trans,
gdouble proportion,
GstClockTimeDiff diff,
GstClockTime timestamp);
void gst_base_transform_set_qos_enabled (GstBaseTransform *trans,
gboolean enabled);
gboolean gst_base_transform_is_qos_enabled (GstBaseTransform *trans);
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
2005-03-29 16:18:12 +00:00
void gst_base_transform_set_gap_aware (GstBaseTransform *trans,
gboolean gap_aware);
void gst_base_transform_suggest (GstBaseTransform *trans,
GstCaps *caps, gsize size);
void gst_base_transform_reconfigure (GstBaseTransform *trans);
gst/: Simplify pad activation. Original commit message from CVS: * gst/base/Makefile.am: * gst/base/README: * gst/base/gstbasesink.c: (gst_basesink_get_type), (gst_basesink_base_init), (gst_basesink_class_init), (gst_basesink_pad_getcaps), (gst_basesink_init), (gst_basesink_activate), (gst_basesink_change_state): * gst/base/gstbasesink.h: * gst/base/gstbasetransform.c: (gst_base_transform_get_type), (gst_base_transform_base_init), (gst_base_transform_finalize), (gst_base_transform_class_init), (gst_base_transform_init), (gst_base_transform_proxy_getcaps), (gst_base_transform_setcaps), (gst_base_transform_event), (gst_base_transform_getrange), (gst_base_transform_chain), (gst_base_transform_handle_buffer), (gst_base_transform_set_property), (gst_base_transform_get_property), (gst_base_transform_sink_activate), (gst_base_transform_src_activate), (gst_base_transform_change_state): * gst/base/gstbasetransform.h: * gst/elements/gstidentity.c: (gst_identity_finalize), (gst_identity_class_init), (gst_identity_init), (gst_identity_event), (gst_identity_check_perfect), (gst_identity_transform), (gst_identity_set_property), (gst_identity_get_property), (gst_identity_change_state): * gst/elements/gstidentity.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_check_pull_range), (gst_pad_pull_range): * gst/gstpad.h: Simplify pad activation. Added function to check if pull_range can be performed. Error out when pulling inactive or flushing pads. Removed const from refcounted types as it does not make sense. Simplify pad templates in basesink Added base class for simple 1-to-1 transforms. Make identity subclass the base transform.
2005-03-29 16:18:12 +00:00
G_END_DECLS
#endif /* __GST_BASE_TRANSFORM_H__ */