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0ef9a5f5b1
Original commit message from CVS: * Makefile.am: Add check-exports target and run it as part of 'make check' (see #499140 and #493983). * gst/gst_private.h: * gst/gstelementfactory.h: * gst/gstghostpad.c: (gst_proxy_pad_class_init): * gst/gstinfo.c: (_priv_gst_in_valgrind), (_gst_debug_init), (_priv_gst_in_valgrind): * gst/gstinfo.h: (GstLogFunction): * gst/gsttypefind.c: (type_find_debug), (GST_CAT_DEFAULT), (gst_type_find_register): * gst/gsttypefindfactory.c: (type_find_debug), (GST_CAT_DEFAULT), (gst_type_find_factory_get_type): * libs/gst/controller/gstcontroller.c: (GST_CAT_DEFAULT), (GST_CAT_DEFAULT), (parent_class), (priv_gst_controller_key), (gst_controller_new_valist), (gst_controller_new_list), (_gst_controller_dispose), (_gst_controller_class_init): * libs/gst/controller/gstcontrolsource.c: (GST_CAT_DEFAULT): * libs/gst/controller/gsthelper.c: (GST_CAT_DEFAULT), (GST_CAT_DEFAULT), (gst_object_uncontrol_properties), (gst_object_get_controller), (gst_object_set_controller), (gst_object_suggest_next_sync), (gst_object_sync_values), (gst_object_set_control_source), (gst_object_get_control_source), (gst_object_get_value_arrays), (gst_object_get_value_array), (gst_object_get_control_rate), (gst_object_set_control_rate): * libs/gst/controller/gstinterpolation.c: (GST_CAT_DEFAULT): * libs/gst/controller/lib.c: (GST_CAT_DEFAULT): Make some functions that should be static static; rename some private symbols so that they don't get exported; add some FIXME comments so we can move accidentally exported functions into our private section in 0.11. * win32/common/libgstreamer.def: Add gst_utils_get_timestamp().
158 lines
5 KiB
C
158 lines
5 KiB
C
/* GStreamer
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*
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* Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
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*
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* gstcontrolsource.c: Interface declaration for control sources
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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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/**
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* SECTION:gstcontrolsource
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* @short_description: base class for control source sources
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*
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* The #GstControlSource is a base class for control value sources that could
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* be used by #GstController to get timestamp-value pairs.
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*
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* A #GstControlSource is used by first getting an instance, binding it to a
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* #GParamSpec (for example by using gst_controller_set_control_source()) and
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* then by having it used by the #GstController or calling
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* gst_control_source_get_value() or gst_control_source_get_value_array().
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*
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* For implementing a new #GstControlSource one has to implement a
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* #GstControlSourceBind method, which will depending on the #GParamSpec set up
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* the control source for use and sets the #GstControlSourceGetValue and
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* #GstControlSourceGetValueArray functions. These are then used by
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* gst_control_source_get_value() or gst_control_source_get_value_array()
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* to get values for specific timestamps.
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*
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*/
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#include <glib-object.h>
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#include <gst/gst.h>
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#include "gstcontrolsource.h"
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#define GST_CAT_DEFAULT controller_debug
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GST_DEBUG_CATEGORY_EXTERN (GST_CAT_DEFAULT);
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static void gst_control_source_class_init (GstControlSourceClass * klass);
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static void gst_control_source_init (GstControlSource * self);
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G_DEFINE_ABSTRACT_TYPE (GstControlSource, gst_control_source, G_TYPE_OBJECT);
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static GObjectClass *parent_class = NULL;
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static void
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gst_control_source_class_init (GstControlSourceClass * klass)
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{
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//GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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/* Has to be implemented by children */
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klass->bind = NULL;
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}
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static void
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gst_control_source_init (GstControlSource * self)
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{
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/* Set default handlers that print a warning */
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self->get_value = NULL;
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self->get_value_array = NULL;
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self->bound = FALSE;
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}
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/**
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* gst_control_source_get_value:
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* @self: the #GstControlSource object
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* @timestamp: the time for which the value should be returned
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* @value: the value
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*
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* Gets the value for this #GstControlSource at a given timestamp.
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*
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* Returns: FALSE if the value couldn't be returned, TRUE otherwise.
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*/
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gboolean
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gst_control_source_get_value (GstControlSource * self, GstClockTime timestamp,
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GValue * value)
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{
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g_return_val_if_fail (GST_IS_CONTROL_SOURCE (self), FALSE);
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if (self->get_value) {
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return self->get_value (self, timestamp, value);
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} else {
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GST_ERROR ("Not bound to a specific property yet!");
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return FALSE;
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}
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}
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/**
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* gst_control_source_get_value_array:
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* @self: the #GstControlSource object
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* @timestamp: the time that should be processed
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* @value_array: array to put control-values in
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*
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* Gets an array of values for one element property.
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*
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* All fields of @value_array must be filled correctly. Especially the
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* @value_array->values array must be big enough to keep the requested amount
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* of values.
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*
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* The type of the values in the array is the same as the property's type.
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*
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* Returns: %TRUE if the given array could be filled, %FALSE otherwise
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*/
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gboolean
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gst_control_source_get_value_array (GstControlSource * self,
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GstClockTime timestamp, GstValueArray * value_array)
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{
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g_return_val_if_fail (GST_IS_CONTROL_SOURCE (self), FALSE);
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if (self->get_value_array) {
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return self->get_value_array (self, timestamp, value_array);
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} else {
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GST_ERROR ("Not bound to a specific property yet!");
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return FALSE;
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}
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}
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/**
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* gst_control_source_bind:
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* @self: the #GstControlSource object
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* @pspec: #GParamSpec for the property for which this #GstControlSource should generate values.
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*
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* Binds a #GstControlSource to a specific property. This must be called only once for a
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* #GstControlSource.
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*
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* Returns: %TRUE if the #GstControlSource was bound correctly, %FALSE otherwise.
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*/
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gboolean
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gst_control_source_bind (GstControlSource * self, GParamSpec * pspec)
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{
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gboolean ret = FALSE;
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g_return_val_if_fail (GST_IS_CONTROL_SOURCE (self), FALSE);
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g_return_val_if_fail (GST_CONTROL_SOURCE_GET_CLASS (self)->bind, FALSE);
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g_return_val_if_fail (!self->bound, FALSE);
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ret = GST_CONTROL_SOURCE_GET_CLASS (self)->bind (self, pspec);
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if (ret)
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self->bound = TRUE;
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return ret;
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}
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