mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-07-03 21:25:54 +00:00
fe7eeac197
Original commit message from CVS: 2005-11-05 Andy Wingo <wingo@pobox.com> * gst/base/gstpushsrc.c: Shorten by 30% via use of boilerplate macro.
105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000,2005 Wim Taymans <wim@fluendo.com>
|
|
*
|
|
* gstpushsrc.c:
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/**
|
|
* SECTION:gstpushsrc
|
|
* @short_description: Base class for push based source elements
|
|
* @see_also: #GstBaseSrc
|
|
*
|
|
* This class is mostly useful for elements that cannot do
|
|
* random access, or at least very slowly. The source usually
|
|
* prefers to push out a fixed size buffer.
|
|
*
|
|
* Classes extending this base class will usually be scheduled
|
|
* in a push based mode. It the peer accepts to operate without
|
|
* offsets and withing the limits of the allowed block size, this
|
|
* class can operate in getrange based mode automatically.
|
|
*
|
|
* The subclass should extend the methods from the baseclass in
|
|
* addition to the create method.
|
|
*
|
|
* Seeking, flushing, scheduling and sync is all handled by this
|
|
* base class.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include "gstpushsrc.h"
|
|
#include "gsttypefindhelper.h"
|
|
#include <gst/gstmarshal.h>
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_push_src_debug);
|
|
#define GST_CAT_DEFAULT gst_push_src_debug
|
|
|
|
#define _do_init(type) \
|
|
GST_DEBUG_CATEGORY_INIT (gst_push_src_debug, "pushsrc", 0, \
|
|
"pushsrc element");
|
|
|
|
GST_BOILERPLATE_FULL (GstPushSrc, gst_push_src, GstBaseSrc, GST_TYPE_BASE_SRC,
|
|
_do_init);
|
|
|
|
static GstFlowReturn gst_push_src_create (GstBaseSrc * bsrc, guint64 offset,
|
|
guint length, GstBuffer ** ret);
|
|
|
|
static void
|
|
gst_push_src_base_init (gpointer g_class)
|
|
{
|
|
/* nop */
|
|
}
|
|
|
|
static void
|
|
gst_push_src_class_init (GstPushSrcClass * klass)
|
|
{
|
|
GstBaseSrcClass *gstbasesrc_class = (GstBaseSrcClass *) klass;
|
|
|
|
gstbasesrc_class->create = GST_DEBUG_FUNCPTR (gst_push_src_create);
|
|
}
|
|
|
|
static void
|
|
gst_push_src_init (GstPushSrc * pushsrc, GstPushSrcClass * klass)
|
|
{
|
|
/* nop */
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_push_src_create (GstBaseSrc * bsrc, guint64 offset, guint length,
|
|
GstBuffer ** ret)
|
|
{
|
|
GstFlowReturn fret;
|
|
GstPushSrc *src;
|
|
GstPushSrcClass *pclass;
|
|
|
|
src = GST_PUSH_SRC (bsrc);
|
|
pclass = GST_PUSH_SRC_GET_CLASS (src);
|
|
if (pclass->create)
|
|
fret = pclass->create (src, ret);
|
|
else
|
|
fret = GST_FLOW_ERROR;
|
|
|
|
return fret;
|
|
}
|