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gstreamer/gst/gstregistrybinary.c

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/* GStreamer
* Copyright (C) 2006 Josep Torra <josep@fluendo.com>
* 2006 Mathieu Garcia <matthieu@fluendo.com>
* 2006,2007 Stefan Kost <ensonic@users.sf.net>
* 2008 Sebastian Dröge <slomo@circular-chaos.org>
*
* gstregistrybinary.c: GstRegistryBinary object, support routines
*
* 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.
*/
/* FIXME:
* - keep registry binary blob and reference strings
* - don't free/unmmap contents when leaving gst_registry_binary_read_cache()
* - free at gst_deinit() / _priv_gst_registry_cleanup() ?
* - GstPlugin:
* - GST_PLUGIN_FLAG_CONST
* - GstPluginFeature, GstIndexFactory, GstElementFactory
* - needs Flags (GST_PLUGIN_FEATURE_FLAG_CONST)
* - can we turn loaded into flag?
* - why do we collect a list of binary chunks and not write immediately
* - because we need to process subchunks, before we can set e.g. nr_of_items
* in parent chunk
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <errno.h>
#include <stdio.h>
#if defined (_MSC_VER) && _MSC_VER >= 1400
#include <io.h>
#endif
#include <gst/gst_private.h>
#include <gst/gstconfig.h>
#include <gst/gstelement.h>
#include <gst/gsttypefind.h>
#include <gst/gsttypefindfactory.h>
#include <gst/gsturi.h>
#include <gst/gstinfo.h>
#include <gst/gstenumtypes.h>
#include <gst/gstpadtemplate.h>
#include <gst/gstregistrybinary.h>
#include <glib/gstdio.h> /* for g_stat(), g_mapped_file(), ... */
#include "glib-compat-private.h"
#define GST_CAT_DEFAULT GST_CAT_REGISTRY
/* count string length, but return -1 if we hit the eof */
static gint
_strnlen (const gchar * str, gint maxlen)
{
gint len = 0;
if (G_UNLIKELY (len == maxlen))
return -1;
while (*str++ != '\0') {
len++;
if (G_UNLIKELY (len == maxlen))
return -1;
}
return len;
}
/* reading macros */
#define unpack_element(inptr, outptr, element, endptr, error_label) G_STMT_START{ \
if (inptr + sizeof(element) >= endptr) \
goto error_label; \
outptr = (element *) inptr; \
inptr += sizeof (element); \
}G_STMT_END
#define unpack_const_string(inptr, outptr, endptr, error_label) G_STMT_START{\
gint _len = _strnlen (inptr, (endptr-inptr)); \
if (_len == -1) \
goto error_label; \
outptr = g_intern_string ((const gchar *)inptr); \
inptr += _len + 1; \
}G_STMT_END
#define unpack_string(inptr, outptr, endptr, error_label) G_STMT_START{\
gint _len = _strnlen (inptr, (endptr-inptr)); \
if (_len == -1) \
goto error_label; \
outptr = g_memdup ((gconstpointer)inptr, _len + 1); \
inptr += _len + 1; \
}G_STMT_END
#define ALIGNMENT (sizeof (void *))
#define alignment(_address) (gsize)_address%ALIGNMENT
#define align(_ptr) _ptr += (( alignment(_ptr) == 0) ? 0 : ALIGNMENT-alignment(_ptr))
/* Registry saving */
#ifdef G_OS_WIN32
/* On win32, we can't use g_mkstmp(), because of cross-DLL file I/O problems.
* So, we just create the entire binary registry in memory, then write it out
* with g_file_set_contents(), which creates a temporary file internally
*/
typedef struct BinaryRegistryCache
{
const char *location;
guint8 *mem;
gssize len;
} BinaryRegistryCache;
static BinaryRegistryCache *
gst_registry_binary_cache_init (GstRegistry * registry, const char *location)
{
BinaryRegistryCache *cache = g_new0 (BinaryRegistryCache, 1);
cache->location = location;
return cache;
}
static int
gst_registry_binary_cache_write (GstRegistry * registry,
BinaryRegistryCache * cache, unsigned long offset,
const void *data, int length)
{
cache->len = MAX (offset + length, cache->len);
cache->mem = g_realloc (cache->mem, cache->len);
memcpy (cache->mem + offset, data, length);
return length;
}
static gboolean
gst_registry_binary_cache_finish (GstRegistry * registry,
BinaryRegistryCache * cache, gboolean success)
{
gboolean ret = TRUE;
GError *error = NULL;
if (!g_file_set_contents (cache->location, (const gchar *) cache->mem,
cache->len, &error)) {
/* Probably the directory didn't exist; create it */
gchar *dir;
dir = g_path_get_dirname (cache->location);
g_mkdir_with_parents (dir, 0777);
g_free (dir);
g_error_free (error);
error = NULL;
if (!g_file_set_contents (cache->location, (const gchar *) cache->mem,
cache->len, &error)) {
GST_ERROR ("Failed to write to cache file: %s", error->message);
g_error_free (error);
ret = FALSE;
}
}
g_free (cache->mem);
g_free (cache);
return ret;
}
#else
typedef struct BinaryRegistryCache
{
const char *location;
char *tmp_location;
unsigned long currentoffset;
} BinaryRegistryCache;
static BinaryRegistryCache *
gst_registry_binary_cache_init (GstRegistry * registry, const char *location)
{
BinaryRegistryCache *cache = g_new0 (BinaryRegistryCache, 1);
cache->location = location;
cache->tmp_location = g_strconcat (location, ".tmpXXXXXX", NULL);
registry->cache_file = g_mkstemp (cache->tmp_location);
if (registry->cache_file == -1) {
gchar *dir;
/* oops, I bet the directory doesn't exist */
dir = g_path_get_dirname (location);
g_mkdir_with_parents (dir, 0777);
g_free (dir);
/* the previous g_mkstemp call overwrote the XXXXXX placeholder ... */
g_free (cache->tmp_location);
cache->tmp_location = g_strconcat (location, ".tmpXXXXXX", NULL);
registry->cache_file = g_mkstemp (cache->tmp_location);
if (registry->cache_file == -1) {
GST_DEBUG ("g_mkstemp() failed: %s", g_strerror (errno));
g_free (cache->tmp_location);
g_free (cache);
return NULL;
}
}
return cache;
}
static int
gst_registry_binary_cache_write (GstRegistry * registry,
BinaryRegistryCache * cache, unsigned long offset,
const void *data, int length)
{
long written;
if (offset != cache->currentoffset) {
if (lseek (registry->cache_file, offset, SEEK_SET) != 0) {
GST_ERROR ("Seeking to new offset failed");
return FALSE;
}
cache->currentoffset = offset;
}
written = write (registry->cache_file, data, length);
if (written != length) {
GST_ERROR ("Failed to write to cache file");
}
cache->currentoffset += written;
return written;
}
static gboolean
gst_registry_binary_cache_finish (GstRegistry * registry,
BinaryRegistryCache * cache, gboolean success)
{
/* only fsync if we're actually going to use and rename the file below */
if (success && fsync (registry->cache_file) < 0)
goto fsync_failed;
if (close (registry->cache_file) < 0)
goto close_failed;
if (success) {
/* Only do the rename if we wrote the entire file successfully */
if (g_rename (cache->tmp_location, cache->location) < 0)
goto rename_failed;
}
g_free (cache->tmp_location);
g_free (cache);
GST_INFO ("Wrote binary registry cache");
return TRUE;
/* ERRORS */
fail_after_close:
{
g_unlink (cache->tmp_location);
g_free (cache->tmp_location);
g_free (cache);
return FALSE;
}
fsync_failed:
{
GST_ERROR ("fsync() failed: %s", g_strerror (errno));
goto fail_after_close;
}
close_failed:
{
GST_ERROR ("close() failed: %s", g_strerror (errno));
goto fail_after_close;
}
rename_failed:
{
GST_ERROR ("g_rename() failed: %s", g_strerror (errno));
goto fail_after_close;
}
}
#endif
/*
* gst_registry_binary_write_chunk:
*
* Write from a memory location to the registry cache file
*
* Returns: %TRUE for success
*/
inline static gboolean
gst_registry_binary_write_chunk (GstRegistry * registry,
BinaryRegistryCache * cache, const void *mem,
const gssize size, unsigned long *file_position, gboolean align)
{
gchar padder[ALIGNMENT] = { 0, };
int padsize = 0;
/* Padding to insert the struct that requiere word alignment */
if ((align) && (alignment (*file_position) != 0)) {
padsize = ALIGNMENT - alignment (*file_position);
if (gst_registry_binary_cache_write (registry, cache, *file_position,
padder, padsize) != padsize) {
GST_ERROR ("Failed to write binary registry padder");
return FALSE;
}
*file_position += padsize;
}
if (gst_registry_binary_cache_write (registry, cache, *file_position,
mem, size) != size) {
GST_ERROR ("Failed to write binary registry element");
return FALSE;
}
*file_position += size;
return TRUE;
}
/*
* gst_registry_binary_initialize_magic:
*
* Initialize the GstBinaryRegistryMagic, setting both our magic number and
* gstreamer major/minor version
*/
inline static gboolean
gst_registry_binary_initialize_magic (GstBinaryRegistryMagic * m)
{
memset (m, 0, sizeof (GstBinaryRegistryMagic));
if (!strncpy (m->magic, GST_MAGIC_BINARY_REGISTRY_STR,
GST_MAGIC_BINARY_REGISTRY_LEN)
|| !strncpy (m->version, GST_MAGIC_BINARY_VERSION_STR,
GST_MAGIC_BINARY_VERSION_LEN)) {
GST_ERROR ("Failed to write magic to the registry magic structure");
return FALSE;
}
return TRUE;
}
/*
* gst_registry_binary_save_const_string:
*
* Store a const string in a binary chunk.
*
* Returns: %TRUE for success
*/
inline static gboolean
gst_registry_binary_save_const_string (GList ** list, const gchar * str)
{
GstBinaryChunk *chunk;
if (G_UNLIKELY (str == NULL)) {
GST_ERROR ("unexpected NULL string in plugin or plugin feature data");
str = "";
}
chunk = g_malloc (sizeof (GstBinaryChunk));
chunk->data = (gpointer) str;
chunk->size = strlen ((gchar *) chunk->data) + 1;
chunk->flags = GST_BINARY_REGISTRY_FLAG_CONST;
chunk->align = FALSE;
*list = g_list_prepend (*list, chunk);
return TRUE;
}
/*
* gst_registry_binary_save_string:
*
* Store a string in a binary chunk.
*
* Returns: %TRUE for success
*/
inline static gboolean
gst_registry_binary_save_string (GList ** list, gchar * str)
{
GstBinaryChunk *chunk;
chunk = g_malloc (sizeof (GstBinaryChunk));
chunk->data = str;
chunk->size = strlen ((gchar *) chunk->data) + 1;
chunk->flags = GST_BINARY_REGISTRY_FLAG_NONE;
chunk->align = FALSE;
*list = g_list_prepend (*list, chunk);
return TRUE;
}
/*
* gst_registry_binary_save_data:
*
* Store some data in a binary chunk.
*
* Returns: the initialized chunk
*/
inline static GstBinaryChunk *
gst_registry_binary_make_data (gpointer data, gulong size)
{
GstBinaryChunk *chunk;
chunk = g_malloc (sizeof (GstBinaryChunk));
chunk->data = data;
chunk->size = size;
chunk->flags = GST_BINARY_REGISTRY_FLAG_NONE;
chunk->align = TRUE;
return chunk;
}
/*
* gst_registry_binary_save_pad_template:
*
* Store pad_templates in binary chunks.
*
* Returns: %TRUE for success
*/
static gboolean
gst_registry_binary_save_pad_template (GList ** list,
GstStaticPadTemplate * template)
{
GstBinaryPadTemplate *pt;
GstBinaryChunk *chk;
pt = g_malloc0 (sizeof (GstBinaryPadTemplate));
chk = gst_registry_binary_make_data (pt, sizeof (GstBinaryPadTemplate));
pt->presence = template->presence;
pt->direction = template->direction;
/* pack pad template strings */
gst_registry_binary_save_const_string (list,
(gchar *) (template->static_caps.string));
gst_registry_binary_save_const_string (list, template->name_template);
*list = g_list_prepend (*list, chk);
return TRUE;
}
/*
* gst_registry_binary_save_feature:
*
* Store features in binary chunks.
*
* Returns: %TRUE for success
*/
static gboolean
gst_registry_binary_save_feature (GList ** list, GstPluginFeature * feature)
{
const gchar *type_name = g_type_name (G_OBJECT_TYPE (feature));
GstBinaryPluginFeature *pf = NULL;
GstBinaryChunk *chk = NULL;
GList *walk;
if (!type_name) {
GST_ERROR ("NULL feature type_name, aborting.");
return FALSE;
}
if (GST_IS_ELEMENT_FACTORY (feature)) {
GstBinaryElementFactory *ef;
GstElementFactory *factory = GST_ELEMENT_FACTORY (feature);
ef = g_malloc0 (sizeof (GstBinaryElementFactory));
chk = gst_registry_binary_make_data (ef, sizeof (GstBinaryElementFactory));
ef->npadtemplates = ef->ninterfaces = ef->nuriprotocols = 0;
pf = (GstBinaryPluginFeature *) ef;
/* save interfaces */
for (walk = factory->interfaces; walk;
walk = g_list_next (walk), ef->ninterfaces++) {
gst_registry_binary_save_const_string (list, (gchar *) walk->data);
}
GST_DEBUG ("Saved %d Interfaces", ef->ninterfaces);
/* save uritypes */
if (GST_URI_TYPE_IS_VALID (factory->uri_type)) {
if (factory->uri_protocols && *factory->uri_protocols) {
GstBinaryChunk *subchk;
gchar **protocol;
subchk =
gst_registry_binary_make_data (&factory->uri_type,
sizeof (factory->uri_type));
subchk->flags = GST_BINARY_REGISTRY_FLAG_CONST;
protocol = factory->uri_protocols;
while (*protocol) {
gst_registry_binary_save_const_string (list, *protocol++);
ef->nuriprotocols++;
}
*list = g_list_prepend (*list, subchk);
GST_DEBUG ("Saved %d UriTypes", ef->nuriprotocols);
} else {
g_warning ("GStreamer feature '%s' is URI handler but does not provide"
" any protocols it can handle", feature->name);
}
}
/* save pad-templates */
for (walk = factory->staticpadtemplates; walk;
walk = g_list_next (walk), ef->npadtemplates++) {
GstStaticPadTemplate *template = walk->data;
if (!gst_registry_binary_save_pad_template (list, template)) {
GST_ERROR ("Can't fill pad template, aborting.");
goto fail;
}
}
/* pack element factory strings */
gst_registry_binary_save_const_string (list, factory->details.author);
gst_registry_binary_save_const_string (list, factory->details.description);
gst_registry_binary_save_const_string (list, factory->details.klass);
gst_registry_binary_save_const_string (list, factory->details.longname);
} else if (GST_IS_TYPE_FIND_FACTORY (feature)) {
GstBinaryTypeFindFactory *tff;
GstTypeFindFactory *factory = GST_TYPE_FIND_FACTORY (feature);
tff = g_malloc0 (sizeof (GstBinaryTypeFindFactory));
chk =
gst_registry_binary_make_data (tff, sizeof (GstBinaryTypeFindFactory));
tff->nextensions = 0;
pf = (GstBinaryPluginFeature *) tff;
/* save extensions */
if (factory->extensions) {
while (factory->extensions[tff->nextensions]) {
gst_registry_binary_save_const_string (list,
factory->extensions[tff->nextensions++]);
}
}
/* save caps */
if (factory->caps) {
GstCaps *copy = gst_caps_copy (factory->caps);
gchar *str;
/* we copy the caps here so we can simplify them
* before saving. This is a lot faster when loading
* them later on */
gst_caps_do_simplify (copy);
str = gst_caps_to_string (copy);
gst_caps_unref (copy);
gst_registry_binary_save_string (list, str);
} else {
gst_registry_binary_save_const_string (list, "");
}
} else if (GST_IS_INDEX_FACTORY (feature)) {
GstIndexFactory *factory = GST_INDEX_FACTORY (feature);
pf = g_malloc0 (sizeof (GstBinaryPluginFeature));
chk = gst_registry_binary_make_data (pf, sizeof (GstBinaryPluginFeature));
pf->rank = feature->rank;
/* pack element factory strings */
gst_registry_binary_save_const_string (list, factory->longdesc);
} else {
GST_WARNING ("unhandled feature type '%s'", type_name);
}
if (pf) {
pf->rank = feature->rank;
*list = g_list_prepend (*list, chk);
/* pack plugin feature strings */
gst_registry_binary_save_const_string (list, feature->name);
gst_registry_binary_save_const_string (list, (gchar *) type_name);
return TRUE;
}
/* Errors */
fail:
g_free (chk);
g_free (pf);
return FALSE;
}
static gboolean
gst_registry_binary_save_plugin_dep (GList ** list, GstPluginDep * dep)
{
GstBinaryDep *ed;
GstBinaryChunk *chk;
gchar **s;
ed = g_new0 (GstBinaryDep, 1);
chk = gst_registry_binary_make_data (ed, sizeof (GstBinaryDep));
ed->flags = dep->flags;
ed->n_env_vars = 0;
ed->n_paths = 0;
ed->n_names = 0;
ed->env_hash = dep->env_hash;
ed->stat_hash = dep->stat_hash;
for (s = dep->env_vars; s != NULL && *s != NULL; ++s, ++ed->n_env_vars)
gst_registry_binary_save_string (list, g_strdup (*s));
for (s = dep->paths; s != NULL && *s != NULL; ++s, ++ed->n_paths)
gst_registry_binary_save_string (list, g_strdup (*s));
for (s = dep->names; s != NULL && *s != NULL; ++s, ++ed->n_names)
gst_registry_binary_save_string (list, g_strdup (*s));
*list = g_list_prepend (*list, chk);
GST_LOG ("Saved external plugin dependency");
return TRUE;
}
/*
* gst_registry_binary_save_plugin:
*
* Adapt a GstPlugin to our GstBinaryPluginElement structure, and write it to
* the registry file.
*/
static gboolean
gst_registry_binary_save_plugin (GList ** list, GstRegistry * registry,
GstPlugin * plugin)
{
GstBinaryPluginElement *pe;
GstBinaryChunk *chk;
GList *plugin_features = NULL;
GList *walk;
pe = g_malloc0 (sizeof (GstBinaryPluginElement));
chk = gst_registry_binary_make_data (pe, sizeof (GstBinaryPluginElement));
pe->file_size = plugin->file_size;
pe->file_mtime = plugin->file_mtime;
pe->n_deps = 0;
pe->nfeatures = 0;
/* pack external deps */
for (walk = plugin->priv->deps; walk != NULL; walk = walk->next) {
if (!gst_registry_binary_save_plugin_dep (list, walk->data)) {
GST_ERROR ("Could not save external plugin dependency, aborting.");
goto fail;
}
++pe->n_deps;
}
/* pack plugin features */
plugin_features =
gst_registry_get_feature_list_by_plugin (registry, plugin->desc.name);
for (walk = plugin_features; walk; walk = g_list_next (walk), pe->nfeatures++) {
GstPluginFeature *feature = GST_PLUGIN_FEATURE (walk->data);
if (!gst_registry_binary_save_feature (list, feature)) {
GST_ERROR ("Can't fill plugin feature, aborting.");
goto fail;
}
}
GST_DEBUG ("Save plugin '%s' with %d feature(s)", plugin->desc.name,
pe->nfeatures);
gst_plugin_feature_list_free (plugin_features);
/* pack cache data */
if (plugin->priv->cache_data) {
gchar *cache_str = gst_structure_to_string (plugin->priv->cache_data);
gst_registry_binary_save_string (list, cache_str);
} else {
gst_registry_binary_save_const_string (list, "");
}
/* pack plugin element strings */
gst_registry_binary_save_const_string (list, plugin->desc.origin);
gst_registry_binary_save_const_string (list, plugin->desc.package);
gst_registry_binary_save_const_string (list, plugin->desc.source);
gst_registry_binary_save_const_string (list, plugin->desc.license);
gst_registry_binary_save_const_string (list, plugin->desc.version);
gst_registry_binary_save_const_string (list, plugin->filename);
gst_registry_binary_save_const_string (list, plugin->desc.description);
gst_registry_binary_save_const_string (list, plugin->desc.name);
*list = g_list_prepend (*list, chk);
GST_DEBUG ("Found %d features in plugin \"%s\"", pe->nfeatures,
plugin->desc.name);
return TRUE;
/* Errors */
fail:
gst_plugin_feature_list_free (plugin_features);
g_free (chk);
g_free (pe);
return FALSE;
}
/**
* gst_registry_binary_write_cache:
* @registry: a #GstRegistry
* @location: a filename
*
* Write the @registry to a cache to file at given @location.
*
* Returns: %TRUE on success.
*/
gboolean
gst_registry_binary_write_cache (GstRegistry * registry, const char *location)
{
GList *walk;
GstBinaryRegistryMagic magic;
GList *to_write = NULL;
unsigned long file_position = 0;
BinaryRegistryCache *cache;
GST_INFO ("Building binary registry cache image");
g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
if (!gst_registry_binary_initialize_magic (&magic))
goto fail;
/* iterate trough the list of plugins and fit them into binary structures */
for (walk = registry->plugins; walk; walk = g_list_next (walk)) {
GstPlugin *plugin = GST_PLUGIN (walk->data);
if (!plugin->filename)
continue;
if (plugin->flags & GST_PLUGIN_FLAG_CACHED) {
struct stat statbuf;
if (g_stat (plugin->filename, &statbuf) < 0 ||
plugin->file_mtime != statbuf.st_mtime ||
plugin->file_size != statbuf.st_size)
continue;
}
if (!gst_registry_binary_save_plugin (&to_write, registry, plugin)) {
GST_ERROR ("Can't write binary plugin information for \"%s\"",
plugin->filename);
}
}
GST_INFO ("Writing binary registry cache");
cache = gst_registry_binary_cache_init (registry, location);
if (!cache)
goto fail_free_list;
/* write magic */
if (gst_registry_binary_cache_write (registry, cache, file_position,
&magic, sizeof (GstBinaryRegistryMagic)) !=
sizeof (GstBinaryRegistryMagic)) {
GST_ERROR ("Failed to write binary registry magic");
goto fail_free_list;
}
file_position += sizeof (GstBinaryRegistryMagic);
/* write out data chunks */
for (walk = to_write; walk; walk = g_list_next (walk)) {
GstBinaryChunk *cur = walk->data;
if (!gst_registry_binary_write_chunk (registry, cache, cur->data, cur->size,
&file_position, cur->align)) {
goto fail_free_list;
}
if (!(cur->flags & GST_BINARY_REGISTRY_FLAG_CONST))
g_free (cur->data);
g_free (cur);
walk->data = NULL;
}
g_list_free (to_write);
if (!gst_registry_binary_cache_finish (registry, cache, TRUE))
return FALSE;
return TRUE;
/* Errors */
fail_free_list:
{
for (walk = to_write; walk; walk = g_list_next (walk)) {
GstBinaryChunk *cur = walk->data;
if (!(cur->flags & GST_BINARY_REGISTRY_FLAG_CONST))
g_free (cur->data);
g_free (cur);
}
g_list_free (to_write);
if (cache)
(void) gst_registry_binary_cache_finish (registry, cache, FALSE);
/* fall through */
}
fail:
{
return FALSE;
}
}
/* Registry loading */
/*
* gst_registry_binary_check_magic:
*
* Check GstBinaryRegistryMagic validity.
* Return < 0 if something is wrong, -2 means
* that just the version of the registry is out of
* date, -1 is a general failure.
*/
static gint
gst_registry_binary_check_magic (gchar ** in, gsize size)
{
GstBinaryRegistryMagic *m;
align (*in);
GST_DEBUG ("Reading/casting for GstBinaryRegistryMagic at address %p", *in);
unpack_element (*in, m, GstBinaryRegistryMagic, (*in + size), fail);
if (strncmp (m->magic, GST_MAGIC_BINARY_REGISTRY_STR,
GST_MAGIC_BINARY_REGISTRY_LEN) != 0) {
GST_WARNING
("Binary registry magic is different : %02x%02x%02x%02x != %02x%02x%02x%02x",
GST_MAGIC_BINARY_REGISTRY_STR[0] & 0xff,
GST_MAGIC_BINARY_REGISTRY_STR[1] & 0xff,
GST_MAGIC_BINARY_REGISTRY_STR[2] & 0xff,
GST_MAGIC_BINARY_REGISTRY_STR[3] & 0xff, m->magic[0] & 0xff,
m->magic[1] & 0xff, m->magic[2] & 0xff, m->magic[3] & 0xff);
return -1;
}
if (strncmp (m->version, GST_MAGIC_BINARY_VERSION_STR,
GST_MAGIC_BINARY_VERSION_LEN)) {
GST_WARNING ("Binary registry magic version is different : %s != %s",
GST_MAGIC_BINARY_VERSION_STR, m->version);
return -2;
}
return 0;
fail:
GST_WARNING ("Not enough data for binary registry magic structure");
return -1;
}
/*
* gst_registry_binary_load_pad_template:
*
* Make a new GstStaticPadTemplate from current GstBinaryPadTemplate structure
*
* Returns: new GstStaticPadTemplate
*/
static gboolean
gst_registry_binary_load_pad_template (GstElementFactory * factory, gchar ** in,
gchar * end)
{
GstBinaryPadTemplate *pt;
GstStaticPadTemplate *template = NULL;
align (*in);
GST_DEBUG ("Reading/casting for GstBinaryPadTemplate at address %p", *in);
unpack_element (*in, pt, GstBinaryPadTemplate, end, fail);
template = g_new0 (GstStaticPadTemplate, 1);
template->presence = pt->presence;
template->direction = pt->direction;
/* unpack pad template strings */
unpack_const_string (*in, template->name_template, end, fail);
unpack_string (*in, template->static_caps.string, end, fail);
__gst_element_factory_add_static_pad_template (factory, template);
GST_DEBUG ("Added pad_template %s", template->name_template);
return TRUE;
fail:
GST_INFO ("Reading pad template failed");
g_free (template);
return FALSE;
}
/*
* gst_registry_binary_load_feature:
*
* Make a new GstPluginFeature from current binary plugin feature structure
*
* Returns: new GstPluginFeature
*/
static gboolean
gst_registry_binary_load_feature (GstRegistry * registry, gchar ** in,
gchar * end, const gchar * plugin_name)
{
GstBinaryPluginFeature *pf = NULL;
GstPluginFeature *feature = NULL;
gchar *type_name = NULL, *str;
GType type;
guint i;
/* unpack plugin feature strings */
unpack_string (*in, type_name, end, fail);
if (G_UNLIKELY (!type_name)) {
GST_ERROR ("No feature type name");
return FALSE;
}
GST_DEBUG ("Plugin '%s' feature typename : '%s'", plugin_name, type_name);
if (G_UNLIKELY (!(type = g_type_from_name (type_name)))) {
GST_ERROR ("Unknown type from typename '%s' for plugin '%s'", type_name,
plugin_name);
g_free (type_name);
return FALSE;
}
if (G_UNLIKELY ((feature = g_object_new (type, NULL)) == NULL)) {
GST_ERROR ("Can't create feature from type");
g_free (type_name);
return FALSE;
}
if (G_UNLIKELY (!GST_IS_PLUGIN_FEATURE (feature))) {
GST_ERROR ("typename : '%s' is not a plugin feature", type_name);
goto fail;
}
/* unpack more plugin feature strings */
unpack_string (*in, feature->name, end, fail);
if (GST_IS_ELEMENT_FACTORY (feature)) {
GstBinaryElementFactory *ef;
guint n;
GstElementFactory *factory = GST_ELEMENT_FACTORY_CAST (feature);
align (*in);
GST_LOG ("Reading/casting for GstBinaryElementFactory at address %p", *in);
unpack_element (*in, ef, GstBinaryElementFactory, end, fail);
pf = (GstBinaryPluginFeature *) ef;
/* unpack element factory strings */
unpack_string (*in, factory->details.longname, end, fail);
unpack_string (*in, factory->details.klass, end, fail);
unpack_string (*in, factory->details.description, end, fail);
unpack_string (*in, factory->details.author, end, fail);
n = ef->npadtemplates;
GST_DEBUG ("Element factory : '%s' with npadtemplates=%d",
factory->details.longname, n);
/* load pad templates */
for (i = 0; i < n; i++) {
if (G_UNLIKELY (!gst_registry_binary_load_pad_template (factory, in,
end))) {
GST_ERROR ("Error while loading binary pad template");
goto fail;
}
}
/* load uritypes */
if (G_UNLIKELY ((n = ef->nuriprotocols))) {
GST_DEBUG ("Reading %d UriTypes at address %p", n, *in);
align (*in);
factory->uri_type = *((guint *) * in);
*in += sizeof (factory->uri_type);
/*unpack_element(*in, &factory->uri_type, factory->uri_type, end, fail); */
factory->uri_protocols = g_new0 (gchar *, n + 1);
for (i = 0; i < n; i++) {
unpack_string (*in, str, end, fail);
factory->uri_protocols[i] = str;
}
}
/* load interfaces */
if (G_UNLIKELY ((n = ef->ninterfaces))) {
GST_DEBUG ("Reading %d Interfaces at address %p", n, *in);
for (i = 0; i < n; i++) {
unpack_string (*in, str, end, fail);
__gst_element_factory_add_interface (factory, str);
g_free (str);
}
}
} else if (GST_IS_TYPE_FIND_FACTORY (feature)) {
GstBinaryTypeFindFactory *tff;
GstTypeFindFactory *factory = GST_TYPE_FIND_FACTORY (feature);
align (*in);
GST_DEBUG ("Reading/casting for GstBinaryPluginFeature at address %p", *in);
unpack_element (*in, tff, GstBinaryTypeFindFactory, end, fail);
pf = (GstBinaryPluginFeature *) tff;
/* load caps */
unpack_string (*in, str, end, fail);
factory->caps = (str && *str) ? gst_caps_from_string (str) : NULL;
g_free (str);
/* load extensions */
if (tff->nextensions) {
GST_DEBUG ("Reading %d Typefind extensions at address %p",
tff->nextensions, *in);
factory->extensions = g_new0 (gchar *, tff->nextensions + 1);
for (i = 0; i < tff->nextensions; i++) {
unpack_string (*in, str, end, fail);
factory->extensions[i] = str;
}
}
} else if (GST_IS_INDEX_FACTORY (feature)) {
GstIndexFactory *factory = GST_INDEX_FACTORY (feature);
align (*in);
GST_DEBUG ("Reading/casting for GstBinaryPluginFeature at address %p", *in);
unpack_element (*in, pf, GstBinaryPluginFeature, end, fail);
/* unpack index factory strings */
unpack_string (*in, factory->longdesc, end, fail);
} else {
GST_WARNING ("unhandled factory type : %s", G_OBJECT_TYPE_NAME (feature));
goto fail;
}
feature->rank = pf->rank;
/* should already be the interned string, but better make sure */
feature->plugin_name = g_intern_string (plugin_name);
gst_registry_add_feature (registry, feature);
GST_DEBUG ("Added feature %s", feature->name);
g_free (type_name);
return TRUE;
/* Errors */
fail:
GST_INFO ("Reading plugin feature failed");
g_free (type_name);
if (feature) {
if (GST_IS_OBJECT (feature))
gst_object_unref (feature);
else
g_object_unref (feature);
}
return FALSE;
}
static gchar **
gst_registry_binary_load_plugin_dep_strv (gchar ** in, gchar * end, guint n)
{
gchar **arr;
if (n == 0)
return NULL;
arr = g_new0 (gchar *, n + 1);
while (n > 0) {
unpack_string (*in, arr[n - 1], end, fail);
--n;
}
return arr;
fail:
GST_INFO ("Reading plugin dependency strings failed");
return NULL;
}
static gboolean
gst_registry_binary_load_plugin_dep (GstPlugin * plugin, gchar ** in,
gchar * end)
{
GstPluginDep *dep;
GstBinaryDep *d;
gchar **s;
align (*in);
GST_LOG_OBJECT (plugin, "Unpacking GstBinaryDep from %p", *in);
unpack_element (*in, d, GstBinaryDep, end, fail);
dep = g_new0 (GstPluginDep, 1);
dep->env_hash = d->env_hash;
dep->stat_hash = d->stat_hash;
dep->flags = d->flags;
dep->names = gst_registry_binary_load_plugin_dep_strv (in, end, d->n_names);
dep->paths = gst_registry_binary_load_plugin_dep_strv (in, end, d->n_paths);
dep->env_vars =
gst_registry_binary_load_plugin_dep_strv (in, end, d->n_env_vars);
plugin->priv->deps = g_list_append (plugin->priv->deps, dep);
GST_DEBUG_OBJECT (plugin, "Loaded external plugin dependency from registry: "
"env_hash: %08x, stat_hash: %08x", dep->env_hash, dep->stat_hash);
for (s = dep->env_vars; s != NULL && *s != NULL; ++s)
GST_LOG_OBJECT (plugin, " evar: %s", *s);
for (s = dep->paths; s != NULL && *s != NULL; ++s)
GST_LOG_OBJECT (plugin, " path: %s", *s);
for (s = dep->names; s != NULL && *s != NULL; ++s)
GST_LOG_OBJECT (plugin, " name: %s", *s);
return TRUE;
fail:
GST_INFO ("Reading plugin dependency failed");
return FALSE;
}
/*
* gst_registry_binary_load_plugin:
*
* Make a new GstPlugin from current GstBinaryPluginElement structure
* and save it to the GstRegistry. Return an offset to the next
* GstBinaryPluginElement structure.
*/
static gboolean
gst_registry_binary_load_plugin (GstRegistry * registry, gchar ** in,
gchar * end)
{
GstBinaryPluginElement *pe;
GstPlugin *plugin = NULL;
gchar *cache_str = NULL;
guint i, n;
align (*in);
GST_LOG ("Reading/casting for GstBinaryPluginElement at address %p", *in);
unpack_element (*in, pe, GstBinaryPluginElement, end, fail);
plugin = g_object_new (GST_TYPE_PLUGIN, NULL);
/* TODO: also set GST_PLUGIN_FLAG_CONST */
plugin->flags |= GST_PLUGIN_FLAG_CACHED;
plugin->file_mtime = pe->file_mtime;
plugin->file_size = pe->file_size;
/* unpack plugin element strings */
unpack_const_string (*in, plugin->desc.name, end, fail);
unpack_string (*in, plugin->desc.description, end, fail);
unpack_string (*in, plugin->filename, end, fail);
unpack_const_string (*in, plugin->desc.version, end, fail);
unpack_const_string (*in, plugin->desc.license, end, fail);
unpack_const_string (*in, plugin->desc.source, end, fail);
unpack_const_string (*in, plugin->desc.package, end, fail);
unpack_const_string (*in, plugin->desc.origin, end, fail);
GST_LOG ("read strings for name='%s'", plugin->desc.name);
GST_LOG (" desc.description='%s'", plugin->desc.description);
GST_LOG (" filename='%s'", plugin->filename);
GST_LOG (" desc.version='%s'", plugin->desc.version);
GST_LOG (" desc.license='%s'", plugin->desc.license);
GST_LOG (" desc.source='%s'", plugin->desc.source);
GST_LOG (" desc.package='%s'", plugin->desc.package);
GST_LOG (" desc.origin='%s'", plugin->desc.origin);
/* unpack cache data */
unpack_string (*in, cache_str, end, fail);
if (*cache_str) {
plugin->priv->cache_data = gst_structure_from_string (cache_str, NULL);
}
g_free (cache_str);
plugin->basename = g_path_get_basename (plugin->filename);
/* Takes ownership of plugin */
gst_registry_add_plugin (registry, plugin);
n = pe->nfeatures;
GST_DEBUG ("Added plugin '%s' plugin with %d features from binary registry",
plugin->desc.name, n);
/* Load plugin features */
for (i = 0; i < n; i++) {
if (G_UNLIKELY (!gst_registry_binary_load_feature (registry, in, end,
plugin->desc.name))) {
GST_ERROR ("Error while loading binary feature");
gst_registry_remove_plugin (registry, plugin);
goto fail;
}
}
/* Load external plugin dependencies */
for (i = 0; i < pe->n_deps; ++i) {
if (G_UNLIKELY (!gst_registry_binary_load_plugin_dep (plugin, in, end))) {
GST_ERROR_OBJECT (plugin, "Could not read external plugin dependency");
gst_registry_remove_plugin (registry, plugin);
goto fail;
}
}
return TRUE;
/* Errors */
fail:
GST_INFO ("Reading plugin failed");
return FALSE;
}
/**
* gst_registry_binary_read_cache:
* @registry: a #GstRegistry
* @location: a filename
*
* Read the contents of the binary cache file at @location into @registry.
*
* Returns: %TRUE on success.
*/
gboolean
gst_registry_binary_read_cache (GstRegistry * registry, const char *location)
{
GMappedFile *mapped = NULL;
gchar *contents = NULL;
gchar *in = NULL;
gsize size;
GError *err = NULL;
gboolean res = FALSE;
gint check_magic_result;
#ifndef GST_DISABLE_GST_DEBUG
GTimer *timer = NULL;
gdouble seconds;
#endif
/* make sure these types exist */
GST_TYPE_ELEMENT_FACTORY;
GST_TYPE_TYPE_FIND_FACTORY;
GST_TYPE_INDEX_FACTORY;
#ifndef GST_DISABLE_GST_DEBUG
timer = g_timer_new ();
#endif
mapped = g_mapped_file_new (location, FALSE, &err);
if (G_UNLIKELY (err != NULL)) {
GST_INFO ("Unable to mmap file %s : %s", location, err->message);
g_error_free (err);
err = NULL;
g_file_get_contents (location, &contents, &size, &err);
if (err != NULL) {
GST_INFO ("Unable to read file %s : %s", location, err->message);
#ifndef GST_DISABLE_GST_DEBUG
g_timer_destroy (timer);
#endif
g_error_free (err);
return FALSE;
}
} else {
if (G_UNLIKELY ((contents = g_mapped_file_get_contents (mapped)) == NULL)) {
GST_ERROR ("Can't load file %s : %s", location, g_strerror (errno));
goto Error;
}
/* check length for header */
size = g_mapped_file_get_length (mapped);
}
/* in is a cursor pointer, we initialize it with the begin of registry and is updated on each read */
in = contents;
GST_DEBUG ("File data at address %p", in);
if (G_UNLIKELY (size < sizeof (GstBinaryRegistryMagic))) {
GST_ERROR ("No or broken registry header for file at %s", location);
goto Error;
}
/* check if header is valid */
if (G_UNLIKELY ((check_magic_result =
gst_registry_binary_check_magic (&in, size)) < 0)) {
if (check_magic_result == -1)
GST_ERROR
("Binary registry type not recognized (invalid magic) for file at %s",
location);
goto Error;
}
/* check if there are plugins in the file */
if (G_UNLIKELY (!(((gsize) in + sizeof (GstBinaryPluginElement)) <
(gsize) contents + size))) {
GST_INFO ("No binary plugins structure to read");
/* empty file, this is not an error */
} else {
gchar *end = contents + size;
/* read as long as we still have space for a GstBinaryPluginElement */
for (;
((gsize) in + sizeof (GstBinaryPluginElement)) <
(gsize) contents + size;) {
GST_DEBUG ("reading binary registry %" G_GSIZE_FORMAT "(%x)/%"
G_GSIZE_FORMAT, (gsize) in - (gsize) contents,
(guint) ((gsize) in - (gsize) contents), size);
if (!gst_registry_binary_load_plugin (registry, &in, end)) {
GST_ERROR ("Problem while reading binary registry %s", location);
goto Error;
}
}
}
#ifndef GST_DISABLE_GST_DEBUG
g_timer_stop (timer);
seconds = g_timer_elapsed (timer, NULL);
#endif
GST_INFO ("loaded %s in %lf seconds", location, seconds);
res = TRUE;
/* TODO: once we re-use the pointers to registry contents, return here */
Error:
#ifndef GST_DISABLE_GST_DEBUG
g_timer_destroy (timer);
#endif
if (mapped) {
g_mapped_file_free (mapped);
} else {
g_free (contents);
}
return res;
}
/* FIXME 0.11: these are here for backwards compatibility */
gboolean
gst_registry_xml_read_cache (GstRegistry * registry, const char *location)
{
return FALSE;
}
gboolean
gst_registry_xml_write_cache (GstRegistry * registry, const char *location)
{
return FALSE;
}
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