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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
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* Copyright (C) 2006 Josep Torra <josep@fluendo.com>
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* Copyright (C) 2006 Mathieu Garcia <matthieu@fluendo.com>
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* Copyright (C) 2006 Stefan Kost <ensonic@sonicpulse.de>
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*
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* gstregistrybinary.h: Header for registry handling
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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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/* SUGGESTIONS AND TODO :
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** ====================
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** - Use a compressed registry, but would induce performance loss
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** - Encrypt the registry, for security purpose, but would also reduce performances
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*/
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#ifndef __GST_REGISTRYBINARY_H__
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#define __GST_REGISTRYBINARY_H__
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#include <gst/gstpad.h>
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#include <gst/gstregistry.h>
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/*
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* GST_MAGIC_BINARY_REGISTRY_STR:
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*
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* A tag, written at the beginning of the file
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*/
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#define GST_MAGIC_BINARY_REGISTRY_STR "\xc0\xde\xf0\x0d"
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/*
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* GST_MAGIC_BINARY_REGISTRY_LEN:
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*
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* length of the header tag.
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*/
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#define GST_MAGIC_BINARY_REGISTRY_LEN (4)
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/*
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* GST_MAGIC_BINARY_VERSION_LEN:
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*
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* length of the version string.
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*/
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#define GST_MAGIC_BINARY_VERSION_LEN (64)
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typedef struct _GstBinaryRegistryMagic
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{
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gchar magic[GST_MAGIC_BINARY_REGISTRY_LEN];
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gchar version[GST_MAGIC_BINARY_VERSION_LEN];
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} GstBinaryRegistryMagic;
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/*
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* we reference strings directly from the plugins and in this case set CONST to
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* avoid freeing them
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*/
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enum {
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GST_BINARY_REGISTRY_FLAG_NONE = 0,
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GST_BINARY_REGISTRY_FLAG_CONST = 1
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};
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/*
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* GstBinaryChunk:
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*
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* Header for binary blobs
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*/
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typedef struct _GstBinaryChunk
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{
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gpointer data;
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guint size;
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guint flags;
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gboolean align;
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} GstBinaryChunk;
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/*
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* GstBinaryPluginElement:
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*
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* @nfeatures: says how many binary plugin feature structures we will have
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* right after the structure itself.
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*
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* A structure containing (staticely) every information needed for a plugin
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*/
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typedef struct _GstBinaryPluginElement
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{
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gulong file_size;
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gulong file_mtime;
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guint nfeatures;
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} GstBinaryPluginElement;
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/*
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* GstBinaryPluginFeature:
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* @rank: rank of the feature
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*
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* A structure containing the plugin features
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*/
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typedef struct _GstBinaryPluginFeature
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{
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gulong rank;
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} GstBinaryPluginFeature;
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/*
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* GstBinaryElementFactory:
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* @npadtemplates: stores the number of GstBinaryPadTemplate structures
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* following the structure
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* @ninterfaces: stores the number of interface names following the structure
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* @nuriprotocols: stores the number of protocol strings following the structure
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*
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* A structure containing the element factory fields
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*/
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typedef struct _GstBinaryElementFactory
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{
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GstBinaryPluginFeature plugin_feature;
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guint npadtemplates;
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guint ninterfaces;
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guint nuriprotocols;
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} GstBinaryElementFactory;
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/*
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* GstBinaryTypeFindFactory:
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* @nextensions: stores the number of typefind extensions
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*
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* A structure containing the element factory fields
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*/
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typedef struct _GstBinaryTypeFindFactory
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{
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GstBinaryPluginFeature plugin_feature;
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guint nextensions;
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} GstBinaryTypeFindFactory;
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/*
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* GstBinaryPadTemplate:
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*
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* A structure containing the static pad templates of a plugin feature
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*/
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typedef struct _GstBinaryPadTemplate
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{
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guint direction; /* Either 0:"sink" or 1:"src" */
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GstPadPresence presence;
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} GstBinaryPadTemplate;
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/* Function prototypes */
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gboolean gst_registry_binary_write_cache(GstRegistry *registry, const char *location);
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gboolean gst_registry_binary_read_cache(GstRegistry *registry, const char *location);
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#endif /* !__GST_REGISTRYBINARY_H__ */
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