mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-30 05:31:15 +00:00
14999bf0f5
Original commit message from CVS: * gst/gstregistrybinary.c: (gst_registry_binary_write_cache), (gst_registry_binary_load_pad_template), (gst_registry_binary_load_plugin), (gst_registry_binary_read_cache): * gst/gstregistrybinary.h: Implement no-mmap alternative for registry reading. Do code cleanups. Add more comments about avoiding strdups for all text data. Comments welcome.
160 lines
4 KiB
C
160 lines
4 KiB
C
/* GStreamer
|
|
* Copyright (C) 2006 Josep Torra <josep@fluendo.com>
|
|
* Copyright (C) 2006 Mathieu Garcia <matthieu@fluendo.com>
|
|
* Copyright (C) 2006 Stefan Kost <ensonic@sonicpulse.de>
|
|
*
|
|
* gstregistrybinary.h: Header for registry handling
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/* SUGGESTIONS AND TODO :
|
|
** ====================
|
|
** - Use a compressed registry, but would induce performance loss
|
|
** - Encrypt the registry, for security purpose, but would also reduce performances
|
|
*/
|
|
|
|
#ifndef __GST_REGISTRYBINARY_H__
|
|
#define __GST_REGISTRYBINARY_H__
|
|
|
|
#include <gst/gstpad.h>
|
|
#include <gst/gstregistry.h>
|
|
|
|
/*
|
|
* GST_MAGIC_BINARY_REGISTRY_STR:
|
|
*
|
|
* A tag, written at the beginning of the file
|
|
*/
|
|
#define GST_MAGIC_BINARY_REGISTRY_STR "\xc0\xde\xf0\x0d"
|
|
/*
|
|
* GST_MAGIC_BINARY_REGISTRY_LEN:
|
|
*
|
|
* length of the header tag.
|
|
*/
|
|
#define GST_MAGIC_BINARY_REGISTRY_LEN (4)
|
|
/*
|
|
* GST_MAGIC_BINARY_VERSION_LEN:
|
|
*
|
|
* length of the version string.
|
|
*/
|
|
#define GST_MAGIC_BINARY_VERSION_LEN (64)
|
|
|
|
typedef struct _GstBinaryRegistryMagic
|
|
{
|
|
gchar magic[GST_MAGIC_BINARY_REGISTRY_LEN];
|
|
gchar version[GST_MAGIC_BINARY_VERSION_LEN];
|
|
} GstBinaryRegistryMagic;
|
|
|
|
/*
|
|
* we reference strings directly from the plugins and in this case set CONST to
|
|
* avoid freeing them
|
|
*/
|
|
enum {
|
|
GST_BINARY_REGISTRY_FLAG_NONE = 0,
|
|
GST_BINARY_REGISTRY_FLAG_CONST = 1
|
|
};
|
|
|
|
/*
|
|
* GstBinaryChunk:
|
|
*
|
|
* Header for binary blobs
|
|
*/
|
|
typedef struct _GstBinaryChunk
|
|
{
|
|
gpointer data;
|
|
guint size;
|
|
guint flags;
|
|
gboolean align;
|
|
} GstBinaryChunk;
|
|
|
|
/*
|
|
* GstBinaryPluginElement:
|
|
*
|
|
* @nfeatures: says how many binary plugin feature structures we will have
|
|
* right after the structure itself.
|
|
*
|
|
* A structure containing (staticely) every information needed for a plugin
|
|
*/
|
|
|
|
typedef struct _GstBinaryPluginElement
|
|
{
|
|
gulong file_size;
|
|
gulong file_mtime;
|
|
|
|
guint nfeatures;
|
|
} GstBinaryPluginElement;
|
|
|
|
|
|
/*
|
|
* GstBinaryPluginFeature:
|
|
* @rank: rank of the feature
|
|
*
|
|
* A structure containing the plugin features
|
|
*/
|
|
typedef struct _GstBinaryPluginFeature
|
|
{
|
|
gulong rank;
|
|
} GstBinaryPluginFeature;
|
|
|
|
/*
|
|
* GstBinaryElementFactory:
|
|
* @npadtemplates: stores the number of GstBinaryPadTemplate structures
|
|
* following the structure
|
|
* @ninterfaces: stores the number of interface names following the structure
|
|
* @nuriprotocols: stores the number of protocol strings following the structure
|
|
*
|
|
* A structure containing the element factory fields
|
|
*/
|
|
typedef struct _GstBinaryElementFactory
|
|
{
|
|
GstBinaryPluginFeature plugin_feature;
|
|
|
|
guint npadtemplates;
|
|
guint ninterfaces;
|
|
guint nuriprotocols;
|
|
} GstBinaryElementFactory;
|
|
|
|
/*
|
|
* GstBinaryTypeFindFactory:
|
|
* @nextensions: stores the number of typefind extensions
|
|
*
|
|
* A structure containing the element factory fields
|
|
*/
|
|
typedef struct _GstBinaryTypeFindFactory
|
|
{
|
|
GstBinaryPluginFeature plugin_feature;
|
|
|
|
guint nextensions;
|
|
} GstBinaryTypeFindFactory;
|
|
|
|
/*
|
|
* GstBinaryPadTemplate:
|
|
*
|
|
* A structure containing the static pad templates of a plugin feature
|
|
*/
|
|
typedef struct _GstBinaryPadTemplate
|
|
{
|
|
guint direction; /* Either 0:"sink" or 1:"src" */
|
|
GstPadPresence presence;
|
|
} GstBinaryPadTemplate;
|
|
|
|
|
|
/* Function prototypes */
|
|
gboolean gst_registry_binary_write_cache(GstRegistry *registry, const char *location);
|
|
gboolean gst_registry_binary_read_cache(GstRegistry *registry, const char *location);
|
|
|
|
#endif /* !__GST_REGISTRYBINARY_H__ */
|
|
|