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e20ed97cb2
Original commit message from CVS: 2005-08-04 Andy Wingo <wingo@pobox.com> * gst/elements/gstcapsfilter.c: Reimplement using basetransform, fixes buffer_alloc proxying among other things. * gst/base/gstbasetransform.c: * gst/base/gstbasetransform.h: Revert patch to gstbasetransform from 7-28 removing delay_configure. * gst/base/gstbasetransform.h (GstBaseTransformClass.get_size): * gst/base/gstbasetransform.c (gst_base_transform_get_size): Semantics changed, should return not the size of the output buffer but the byte size of a buffer with a given caps. * gst/base/gstbasetransform.c (gst_base_transform_getcaps): Better debug object. (gst_base_transform_configure_caps): Don't set out_size here: (in, out) are not the pad caps until setcaps finishes. (gst_base_transform_buffer_alloc): Proxy the buffer_alloc for the not-in-place case as well. Deal with changing from in-place to not-in-place within calling pad_alloc_buffer. Still a bit concerned about the overhead here...
98 lines
3.5 KiB
C
98 lines
3.5 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2005 Wim Taymans <wim@fluendo.com>
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*
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* gstbasetransform.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_TRANSFORM_H__
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#define __GST_BASE_TRANSFORM_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_BASE_TRANSFORM (gst_base_transform_get_type())
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#define GST_BASE_TRANSFORM(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_TRANSFORM,GstBaseTransform))
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#define GST_BASE_TRANSFORM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_TRANSFORM,GstBaseTransformClass))
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#define GST_BASE_TRANSFORM_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_BASE_TRANSFORM,GstBaseTransformClass))
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#define GST_IS_BASE_TRANSFORM(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_TRANSFORM))
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#define GST_IS_BASE_TRANSFORM_CLASS(obj)(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_TRANSFORM))
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/* the names of the templates for the sink and source pads */
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#define GST_BASE_TRANSFORM_SINK_NAME "sink"
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#define GST_BASE_TRANSFORM_SRC_NAME "src"
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typedef struct _GstBaseTransform GstBaseTransform;
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typedef struct _GstBaseTransformClass GstBaseTransformClass;
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struct _GstBaseTransform {
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GstElement element;
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/* source and sink pads */
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GstPad *sinkpad;
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GstPad *srcpad;
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gboolean passthrough;
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gboolean in_place;
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guint out_size;
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gboolean delay_configure;
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};
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struct _GstBaseTransformClass {
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GstElementClass parent_class;
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/*< public >*/
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/* virtual methods for subclasses */
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/* given caps on one pad, what can I do on the other pad */
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GstCaps* (*transform_caps) (GstBaseTransform *trans, GstPad *pad,
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GstCaps *caps);
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/* notify the subclass of new caps */
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gboolean (*set_caps) (GstBaseTransform *trans, GstCaps *incaps,
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GstCaps *outcaps);
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/* get the byte size of a given caps, -1 on error */
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guint (*get_size) (GstBaseTransform *trans, GstCaps *caps);
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/* start and stop processing, ideal for opening/closing the resource */
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gboolean (*start) (GstBaseTransform *trans);
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gboolean (*stop) (GstBaseTransform *trans);
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gboolean (*event) (GstBaseTransform *trans, GstEvent *event);
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/* transform one incoming buffer to one outgoing buffer */
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GstFlowReturn (*transform) (GstBaseTransform *trans, GstBuffer *inbuf,
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GstBuffer *outbuf);
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/* transform a buffer inplace */
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GstFlowReturn (*transform_ip) (GstBaseTransform *trans, GstBuffer *buf);
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};
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void gst_base_transform_set_passthrough (GstBaseTransform *trans, gboolean passthrough);
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gboolean gst_base_transform_is_passthrough (GstBaseTransform *trans);
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GType gst_base_transform_get_type (void);
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G_END_DECLS
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#endif /* __GST_BASE_TRANSFORM_H__ */
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