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Added fileindex
Original commit message from CVS: Added fileindex
This commit is contained in:
Wim Taymans
parent
0d3e4d08af
commit
411642197f
4 changed files with 1796 additions and 2 deletions
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@ -2,7 +2,7 @@ plugindir = $(libdir)/gstreamer-@GST_MAJORMINOR@
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plugin_LTLIBRARIES = libgstindexers.la
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libgstindexers_la_SOURCES = gstmemindex.c
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libgstindexers_la_SOURCES = gstmemindex.c gstfileindex.c
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libgstindexers_la_CFLAGS = $(GST_CFLAGS)
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libgstindexers_la_LIBADD =
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libgstindexers_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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897
gst/indexers/gstfileindex.c
Normal file
897
gst/indexers/gstfileindex.c
Normal file
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@ -0,0 +1,897 @@
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/* GStreamer
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* Copyright (C) 2003 Erik Walthinsen <omega@cse.ogi.edu>
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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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#include <gst/gst_private.h>
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#include <gst/gstversion.h>
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#include <gst/gstplugin.h>
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#include <gst/gstindex.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#define GST_TYPE_FILE_INDEX \
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(gst_file_index_get_type ())
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#define GST_FILE_INDEX(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_FILE_INDEX, GstFileIndex))
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#define GST_FILE_INDEX_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_FILE_INDEX, GstFileIndexClass))
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#define GST_IS_FILE_INDEX(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_FILE_INDEX))
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#define GST_IS_FILE_INDEX_CLASS(obj) \
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(GST_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_FILE_INDEX))
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/*
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* Object model:
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*
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* We build an index to each entry for each id.
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*
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*
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* fileindex
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* -----------------------------...
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* ! !
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* id1 id2
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* !
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* GArray
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*
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* The fileindex creates a FileIndexId object for each writer id, a
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* Hashtable is kept to map the id to the FileIndexId
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*
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* The FileIndexId also keeps all the values in a sorted GArray.
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*
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* Finding a value for an id/format requires locating the correct GArray,
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* then do a binary search to get the required value.
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*
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* Unlike gstmemindex: All formats are assumed to sort to the
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* same order. All formats are assumed to be available from
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* any entry.
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*/
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/*
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* Each array element is (32bits flags, nformats * 64bits)
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*/
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typedef struct {
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gint id;
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gchar *id_desc;
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gint nformats;
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GstFormat *format;
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GArray *array;
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} GstFileIndexId;
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typedef struct _GstFileIndex GstFileIndex;
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typedef struct _GstFileIndexClass GstFileIndexClass;
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#define ARRAY_ROW_SIZE(_ii) \
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(sizeof (gint32) + (_ii)->nformats * sizeof (gint64))
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#define ARRAY_TOTAL_SIZE(_ii) \
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(_ii->array->len * ARRAY_ROW_SIZE(_ii))
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// don't forget to convert to/from BE byte-order
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#define ARRAY_ROW_FLAGS(_row) \
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(*((gint32*) (_row)))
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#define ARRAY_ROW_VALUE(_row,_vx) \
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(*(gint64*) (((gchar*)(_row)) + sizeof (gint32) + (_vx) * sizeof (gint64)))
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struct _GstFileIndex {
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GstIndex parent;
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gchar *location;
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gboolean is_loaded;
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GSList *unresolved;
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GHashTable *id_index;
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GstIndexEntry *ret_entry; // hack to avoid leaking memory
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};
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struct _GstFileIndexClass {
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GstIndexClass parent_class;
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};
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enum {
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ARG_0,
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ARG_LOCATION,
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};
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static void gst_file_index_class_init (GstFileIndexClass *klass);
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static void gst_file_index_init (GstFileIndex *index);
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static void gst_file_index_dispose (GObject *object);
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static void
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gst_file_index_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void
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gst_file_index_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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static gboolean
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gst_file_index_resolve_writer (GstIndex *_index, GstObject *writer,
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gint *id, gchar **writer_string);
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static void gst_file_index_commit (GstIndex *index, gint writer_id);
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static void gst_file_index_add_entry (GstIndex *index, GstIndexEntry *entry);
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static GstIndexEntry* gst_file_index_get_assoc_entry (GstIndex *index, gint id,
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GstIndexLookupMethod method,
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GstAssocFlags flags,
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GstFormat format, gint64 value,
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GCompareDataFunc func,
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gpointer user_data);
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#define CLASS(file_index) GST_FILE_INDEX_CLASS (G_OBJECT_GET_CLASS (file_index))
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static GstIndex *parent_class = NULL;
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GType
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gst_file_index_get_type(void) {
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static GType file_index_type = 0;
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if (!file_index_type) {
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static const GTypeInfo file_index_info = {
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sizeof(GstFileIndexClass),
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NULL,
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NULL,
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(GClassInitFunc)gst_file_index_class_init,
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NULL,
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NULL,
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sizeof(GstFileIndex),
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1,
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(GInstanceInitFunc)gst_file_index_init,
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NULL
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};
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file_index_type = g_type_register_static(GST_TYPE_INDEX, "GstFileIndex", &file_index_info, 0);
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}
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return file_index_type;
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}
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static void
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gst_file_index_class_init (GstFileIndexClass *klass)
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{
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GObjectClass *gobject_class;
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GstIndexClass *gstindex_class;
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gobject_class = (GObjectClass*)klass;
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gstindex_class = (GstIndexClass*)klass;
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parent_class = g_type_class_ref(GST_TYPE_INDEX);
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gobject_class->dispose = gst_file_index_dispose;
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gobject_class->set_property = gst_file_index_set_property;
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gobject_class->get_property = gst_file_index_get_property;
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gstindex_class->add_entry = gst_file_index_add_entry;
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gstindex_class->get_assoc_entry = gst_file_index_get_assoc_entry;
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gstindex_class->commit = gst_file_index_commit;
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gstindex_class->resolve_writer = gst_file_index_resolve_writer;
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g_object_class_install_property (gobject_class, ARG_LOCATION,
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g_param_spec_string ("location", "File Location",
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"Location of the index file",
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NULL, G_PARAM_READWRITE));
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}
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static void
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gst_file_index_init (GstFileIndex *index)
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{
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GST_DEBUG(0, "created new file index");
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index->id_index = g_hash_table_new (g_int_hash, g_int_equal);
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}
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static void
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gst_file_index_dispose (GObject *object)
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{
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GstFileIndex *index = GST_FILE_INDEX (object);
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if (index->location)
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g_free (index->location);
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// need to take care when destroying garrays with mmap'd segments
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static gboolean
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gst_file_index_resolve_writer (GstIndex *_index, GstObject *writer,
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gint *id, gchar **writer_string)
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{
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GstFileIndex *index = GST_FILE_INDEX (_index);
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GSList *pending = index->unresolved;
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gboolean match = FALSE;
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GSList *elem;
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if (!index->is_loaded)
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return TRUE;
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g_return_val_if_fail (id, FALSE);
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g_return_val_if_fail (writer_string, FALSE);
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g_return_val_if_fail (*writer_string, FALSE);
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index->unresolved = NULL;
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for (elem = pending; elem; elem = g_slist_next (elem)) {
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GstFileIndexId *ii = elem->data;
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if (strcmp (ii->id_desc, *writer_string) != 0) {
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index->unresolved = g_slist_prepend (index->unresolved, ii);
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continue;
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}
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if (match) {
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g_warning ("Duplicate matches for writer '%s'", *writer_string);
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continue;
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}
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//g_warning ("resolve %d %s", *id, *writer_string);
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ii->id = *id;
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g_hash_table_insert (index->id_index, id, ii);
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match = TRUE;
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}
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g_slist_free (pending);
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return match;
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}
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static void
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_fc_alloc_array (GstFileIndexId *id_index)
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{
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g_assert (!id_index->array);
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id_index->array =
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g_array_sized_new (FALSE, FALSE, ARRAY_ROW_SIZE (id_index), 0);
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}
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static void
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gst_file_index_load (GstFileIndex *index)
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{
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xmlDocPtr doc;
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xmlNodePtr root, part;
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xmlChar *val;
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g_assert (index->location);
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g_return_if_fail (!index->is_loaded);
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{
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gchar *path = g_strdup_printf ("%s/gstindex.xml", index->location);
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GError *err = NULL;
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gchar *buf;
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gsize len;
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g_file_get_contents (path, &buf, &len, &err);
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g_free (path);
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if (err) g_error ("%s", err->message);
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doc = xmlParseMemory (buf, len);
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g_free (buf);
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}
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//xmlDocFormatDump (stderr, doc, TRUE);
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root = doc->xmlRootNode;
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if (strcmp (root->name, "gstfileindex") != 0)
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g_error ("root node isn't a gstfileindex");
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val = xmlGetProp (root, "version");
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if (!val || atoi (val) != 1)
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g_error ("version != 1");
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free (val);
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for (part = root->children; part; part = part->next) {
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if (strcmp (part->name, "writers") == 0) {
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xmlNodePtr writer;
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for (writer = part->children; writer; writer = writer->next) {
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xmlChar *datafile = xmlGetProp (writer, "datafile");
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gchar *path = g_strdup_printf ("%s/%s", index->location, datafile);
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int fd;
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GstFileIndexId *id_index;
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xmlNodePtr wpart;
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xmlChar *entries_str;
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gpointer array_data;
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free (datafile);
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fd = open (path, O_RDONLY);
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g_free (path);
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if (fd < 0) {
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g_warning ("Can't open '%s': %s", path, strerror (errno));
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continue;
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}
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id_index = g_new0 (GstFileIndexId, 1);
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id_index->id_desc = xmlGetProp (writer, "id");
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for (wpart = writer->children; wpart; wpart = wpart->next) {
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if (strcmp (wpart->name, "formats") == 0) {
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xmlChar *count_str = xmlGetProp (wpart, "count");
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gint fx=0;
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xmlNodePtr format;
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id_index->nformats = atoi (count_str);
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free (count_str);
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id_index->format = g_new (GstFormat, id_index->nformats);
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for (format = wpart->children;
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format; format = format->next) {
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xmlChar *nick = xmlGetProp (format, "nick");
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GstFormat fmt = gst_format_get_by_nick (nick);
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if (fmt == GST_FORMAT_UNDEFINED)
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g_error ("format '%s' undefined", nick);
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g_assert (fx < id_index->nformats);
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id_index->format[fx++] = fmt;
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free (nick);
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}
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} else
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g_warning ("unknown wpart '%s'", wpart->name);
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}
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g_assert (id_index->nformats > 0);
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_fc_alloc_array (id_index);
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g_assert (id_index->array->data == NULL); // little bit risky
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entries_str = xmlGetProp (writer, "entries");
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id_index->array->len = atoi (entries_str);
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free (entries_str);
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array_data =
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mmap (NULL, ARRAY_TOTAL_SIZE (id_index), PROT_READ, MAP_SHARED, fd, 0);
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close (fd);
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if (array_data == MAP_FAILED) {
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g_error ("mmap %s failed: %s", path, strerror (errno));
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continue;
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}
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id_index->array->data = array_data;
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index->unresolved = g_slist_prepend (index->unresolved, id_index);
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}
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} else
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g_warning ("unknown part '%s'", part->name);
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}
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xmlFreeDoc (doc);
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GST_FLAG_UNSET (index, GST_INDEX_WRITABLE);
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index->is_loaded = TRUE;
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}
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static void
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gst_file_index_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GstFileIndex *index = GST_FILE_INDEX (object);
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switch (prop_id) {
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case ARG_LOCATION:
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if (index->location)
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g_free (index->location);
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index->location = g_value_dup_string (value);
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if (index->location && !g_hash_table_size (index->id_index))
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gst_file_index_load (index);
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break;
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}
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}
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static void
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gst_file_index_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GstFileIndex *index = GST_FILE_INDEX (object);
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switch (prop_id) {
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case ARG_LOCATION:
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g_value_set_string (value, index->location);
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break;
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}
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}
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static void
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_file_index_id_save_xml (gpointer _key, GstFileIndexId *ii, xmlNodePtr writers)
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{
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const gint bufsize = 16;
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gchar buf[bufsize];
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xmlNodePtr writer;
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xmlNodePtr formats;
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gint xx;
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writer = xmlNewChild (writers, NULL, "writer", NULL);
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xmlSetProp (writer, "id", ii->id_desc);
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g_snprintf (buf, bufsize, "%d", ii->array->len);
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xmlSetProp (writer, "entries", buf);
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g_snprintf (buf, bufsize, "%d", ii->id); // any unique number is OK
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xmlSetProp (writer, "datafile", buf);
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formats = xmlNewChild (writer, NULL, "formats", NULL);
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g_snprintf (buf, bufsize, "%d", ii->nformats);
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xmlSetProp (formats, "count", buf);
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for (xx=0; xx < ii->nformats; xx++) {
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xmlNodePtr format = xmlNewChild (formats, NULL, "format", NULL);
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const GstFormatDefinition* def =
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gst_format_get_details (ii->format[xx]);
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xmlSetProp (format, "nick", def->nick);
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}
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}
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//
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// We must save the binary data in separate files because
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// mmap wants getpagesize() alignment. If we append all
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// the data to one file then we don't know the appropriate
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// padding since the page size isn't fixed.
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//
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static void
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_file_index_id_save_entries (gpointer *_key,
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GstFileIndexId *ii,
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gchar *prefix)
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{
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GError *err = NULL;
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gchar *path = g_strdup_printf ("%s/%d", prefix, ii->id);
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GIOChannel *chan =
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g_io_channel_new_file (path, "w", &err);
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g_free (path);
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if (err) g_error ("%s", err->message);
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g_io_channel_set_encoding (chan, NULL, &err);
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if (err) g_error ("%s", err->message);
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g_io_channel_write_chars (chan,
|
||||
ii->array->data,
|
||||
ARRAY_TOTAL_SIZE (ii),
|
||||
NULL,
|
||||
&err);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
g_io_channel_shutdown (chan, TRUE, &err);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
g_io_channel_unref (chan);
|
||||
}
|
||||
|
||||
// We have to save the whole set of indexes into a single file
|
||||
// so it doesn't make sense to commit only a single writer.
|
||||
//
|
||||
// i suggest:
|
||||
//
|
||||
// gst_index_commit (index, -1);
|
||||
|
||||
static void
|
||||
gst_file_index_commit (GstIndex *_index, gint _writer_id)
|
||||
{
|
||||
GstFileIndex *index = GST_FILE_INDEX (_index);
|
||||
xmlDocPtr doc;
|
||||
xmlNodePtr writers;
|
||||
GError *err = NULL;
|
||||
gchar *path;
|
||||
GIOChannel *tocfile;
|
||||
|
||||
g_return_if_fail (index->location);
|
||||
g_return_if_fail (!index->is_loaded);
|
||||
|
||||
GST_FLAG_UNSET (index, GST_INDEX_WRITABLE);
|
||||
|
||||
doc = xmlNewDoc ("1.0");
|
||||
doc->xmlRootNode = xmlNewDocNode (doc, NULL, "gstfileindex", NULL);
|
||||
xmlSetProp (doc->xmlRootNode, "version", "1");
|
||||
|
||||
writers = xmlNewChild (doc->xmlRootNode, NULL, "writers", NULL);
|
||||
g_hash_table_foreach (index->id_index,
|
||||
(GHFunc) _file_index_id_save_xml, writers);
|
||||
|
||||
if (mkdir (index->location, 0777) &&
|
||||
errno != EEXIST)
|
||||
g_error ("mkdir %s: %s", index->location, strerror (errno));
|
||||
|
||||
path = g_strdup_printf ("%s/gstindex.xml", index->location);
|
||||
tocfile =
|
||||
g_io_channel_new_file (path, "w", &err);
|
||||
g_free (path);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
g_io_channel_set_encoding (tocfile, NULL, &err);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
{
|
||||
xmlChar *xmlmem;
|
||||
int xmlsize;
|
||||
xmlDocDumpMemory (doc, &xmlmem, &xmlsize);
|
||||
g_io_channel_write_chars (tocfile, xmlmem, xmlsize, NULL, &err);
|
||||
if (err) g_error ("%s", err->message);
|
||||
xmlFreeDoc (doc);
|
||||
free (xmlmem);
|
||||
}
|
||||
|
||||
g_io_channel_shutdown (tocfile, TRUE, &err);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
g_io_channel_unref (tocfile);
|
||||
|
||||
g_hash_table_foreach (index->id_index,
|
||||
(GHFunc) _file_index_id_save_entries,
|
||||
index->location);
|
||||
}
|
||||
|
||||
static void
|
||||
gst_file_index_add_id (GstIndex *index, GstIndexEntry *entry)
|
||||
{
|
||||
GstFileIndex *fileindex = GST_FILE_INDEX (index);
|
||||
GstFileIndexId *id_index;
|
||||
|
||||
id_index = g_hash_table_lookup (fileindex->id_index, &entry->id);
|
||||
|
||||
if (!id_index) {
|
||||
id_index = g_new0 (GstFileIndexId, 1);
|
||||
|
||||
id_index->id = entry->id;
|
||||
id_index->id_desc = g_strdup (entry->data.id.description);
|
||||
|
||||
// It would be useful to know the GType of the writer so
|
||||
// we can try to cope with changes in the id_desc path.
|
||||
|
||||
g_hash_table_insert (fileindex->id_index, &entry->id, id_index);
|
||||
}
|
||||
}
|
||||
|
||||
// This algorithm differs from libc bsearch in the handling
|
||||
// of non-exact matches.
|
||||
|
||||
static gboolean
|
||||
_fc_bsearch (GArray * ary,
|
||||
gint * ret,
|
||||
GCompareDataFunc compare,
|
||||
gconstpointer sample,
|
||||
gpointer user_data)
|
||||
{
|
||||
gint first, last;
|
||||
gint mid;
|
||||
gint midsize;
|
||||
gint cmp;
|
||||
gint tx;
|
||||
|
||||
g_return_val_if_fail (compare, FALSE);
|
||||
|
||||
if (!ary->len)
|
||||
{
|
||||
if (ret) *ret = 0;
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
first = 0;
|
||||
last = ary->len - 1;
|
||||
|
||||
midsize = last - first;
|
||||
|
||||
while (midsize > 1) {
|
||||
mid = first + midsize / 2;
|
||||
|
||||
cmp = (*compare) (sample, &g_array_index (ary, char, mid), user_data);
|
||||
|
||||
if (cmp == 0)
|
||||
{
|
||||
// if there are multiple matches then scan for the first match
|
||||
while (mid > 0 &&
|
||||
(*compare) (sample,
|
||||
&g_array_index (ary, char, mid - 1),
|
||||
user_data) == 0)
|
||||
--mid;
|
||||
|
||||
if (ret) *ret = mid;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
if (cmp < 0)
|
||||
last = mid-1;
|
||||
else
|
||||
first = mid+1;
|
||||
|
||||
midsize = last - first;
|
||||
}
|
||||
|
||||
for (tx = first; tx <= last; tx++)
|
||||
{
|
||||
cmp = (*compare) (sample, &g_array_index (ary, char, tx), user_data);
|
||||
|
||||
if (cmp < 0)
|
||||
{
|
||||
if (ret) *ret = tx;
|
||||
return FALSE;
|
||||
}
|
||||
if (cmp == 0)
|
||||
{
|
||||
if (ret) *ret = tx;
|
||||
return TRUE;
|
||||
}
|
||||
}
|
||||
|
||||
if (ret) *ret = last+1;
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
static gint
|
||||
file_index_compare (gconstpointer sample,
|
||||
gconstpointer row,
|
||||
gpointer user_data)
|
||||
{
|
||||
//GstFileIndexId *id_index = user_data;
|
||||
const GstIndexAssociation *ca = sample;
|
||||
gint64 val1 = ca->value;
|
||||
gint64 val2 = GINT64_FROM_BE (ARRAY_ROW_VALUE (row, ca->format));
|
||||
gint64 diff = val2 - val1;
|
||||
return (diff == 0 ? 0 : (diff > 0 ? 1 : -1));
|
||||
}
|
||||
|
||||
static void
|
||||
gst_file_index_add_association (GstIndex *index, GstIndexEntry *entry)
|
||||
{
|
||||
GstFileIndex *fileindex = GST_FILE_INDEX (index);
|
||||
GstFileIndexId *id_index;
|
||||
gint mx;
|
||||
GstIndexAssociation sample;
|
||||
gboolean exact;
|
||||
gint fx;
|
||||
|
||||
id_index = g_hash_table_lookup (fileindex->id_index, &entry->id);
|
||||
if (!id_index)
|
||||
return;
|
||||
|
||||
if (!id_index->nformats) {
|
||||
gint fx;
|
||||
id_index->nformats = GST_INDEX_NASSOCS (entry);
|
||||
//g_warning ("%d: formats = %d", entry->id, id_index->nformats);
|
||||
id_index->format = g_new (GstFormat, id_index->nformats);
|
||||
for (fx=0; fx < id_index->nformats; fx++)
|
||||
id_index->format[fx] = GST_INDEX_ASSOC_FORMAT (entry, fx);
|
||||
_fc_alloc_array (id_index);
|
||||
} else {
|
||||
/* only sanity checking */
|
||||
if (id_index->nformats != GST_INDEX_NASSOCS (entry))
|
||||
g_warning ("fileindex arity change %d -> %d",
|
||||
id_index->nformats, GST_INDEX_NASSOCS (entry));
|
||||
else {
|
||||
gint fx;
|
||||
for (fx=0; fx < id_index->nformats; fx++)
|
||||
if (id_index->format[fx] != GST_INDEX_ASSOC_FORMAT (entry, fx))
|
||||
g_warning ("fileindex format[%d] changed %d -> %d",
|
||||
fx,
|
||||
id_index->format[fx],
|
||||
GST_INDEX_ASSOC_FORMAT (entry, fx));
|
||||
}
|
||||
}
|
||||
|
||||
/* this is a hack, we should use a private structure instead */
|
||||
sample.format = 0;
|
||||
sample.value = GST_INDEX_ASSOC_VALUE (entry, 0);
|
||||
|
||||
exact =
|
||||
_fc_bsearch (id_index->array, &mx, file_index_compare,
|
||||
&sample, id_index);
|
||||
|
||||
if (exact) {
|
||||
// maybe overwrite instead?
|
||||
g_warning ("ignoring duplicate index association at %lld",
|
||||
GST_INDEX_ASSOC_VALUE (entry, 0));
|
||||
return;
|
||||
}
|
||||
|
||||
// should verify that all formats are ordered XXX
|
||||
|
||||
{
|
||||
gchar row_data[ARRAY_ROW_SIZE (id_index)];
|
||||
|
||||
ARRAY_ROW_FLAGS (row_data) =
|
||||
GINT32_TO_BE (GST_INDEX_ASSOC_FLAGS (entry));
|
||||
|
||||
for (fx = 0; fx < id_index->nformats; fx++)
|
||||
ARRAY_ROW_VALUE (row_data, fx) =
|
||||
GINT64_TO_BE (GST_INDEX_ASSOC_VALUE (entry, fx));
|
||||
|
||||
g_array_insert_val (id_index->array, mx, row_data);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
static void
|
||||
show_entry (GstIndexEntry *entry)
|
||||
{
|
||||
switch (entry->type) {
|
||||
case GST_INDEX_ENTRY_ID:
|
||||
g_print ("id %d describes writer %s\n", entry->id,
|
||||
GST_INDEX_ID_DESCRIPTION (entry));
|
||||
break;
|
||||
case GST_INDEX_ENTRY_FORMAT:
|
||||
g_print ("%d: registered format %d for %s\n", entry->id,
|
||||
GST_INDEX_FORMAT_FORMAT (entry),
|
||||
GST_INDEX_FORMAT_KEY (entry));
|
||||
break;
|
||||
case GST_INDEX_ENTRY_ASSOCIATION:
|
||||
{
|
||||
gint i;
|
||||
|
||||
g_print ("%d: %08x ", entry->id, GST_INDEX_ASSOC_FLAGS (entry));
|
||||
for (i = 0; i < GST_INDEX_NASSOCS (entry); i++) {
|
||||
g_print ("%d %lld ", GST_INDEX_ASSOC_FORMAT (entry, i),
|
||||
GST_INDEX_ASSOC_VALUE (entry, i));
|
||||
}
|
||||
g_print ("\n");
|
||||
break;
|
||||
}
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
*/
|
||||
|
||||
static void
|
||||
gst_file_index_add_entry (GstIndex *index, GstIndexEntry *entry)
|
||||
{
|
||||
GstFileIndex *fileindex = GST_FILE_INDEX (index);
|
||||
|
||||
GST_DEBUG (0, "adding entry %p\n", fileindex);
|
||||
|
||||
//show_entry (entry);
|
||||
|
||||
switch (entry->type){
|
||||
case GST_INDEX_ENTRY_ID:
|
||||
gst_file_index_add_id (index, entry);
|
||||
break;
|
||||
case GST_INDEX_ENTRY_ASSOCIATION:
|
||||
gst_file_index_add_association (index, entry);
|
||||
break;
|
||||
case GST_INDEX_ENTRY_OBJECT:
|
||||
g_error ("gst_file_index_add_object not implemented");
|
||||
break;
|
||||
case GST_INDEX_ENTRY_FORMAT:
|
||||
g_warning ("gst_file_index_add_format not implemented");
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static GstIndexEntry*
|
||||
gst_file_index_get_assoc_entry (GstIndex *index,
|
||||
gint id,
|
||||
GstIndexLookupMethod method,
|
||||
GstAssocFlags flags,
|
||||
GstFormat format,
|
||||
gint64 value,
|
||||
GCompareDataFunc _ignore_func,
|
||||
gpointer _ignore_user_data)
|
||||
{
|
||||
GstFileIndex *fileindex = GST_FILE_INDEX (index);
|
||||
GstFileIndexId *id_index;
|
||||
gint formatx = -1;
|
||||
gint fx;
|
||||
GstIndexAssociation sample;
|
||||
gint mx;
|
||||
gboolean exact;
|
||||
gpointer row_data;
|
||||
GstIndexEntry *entry;
|
||||
gint xx;
|
||||
|
||||
id_index = g_hash_table_lookup (fileindex->id_index, &id);
|
||||
if (!id_index)
|
||||
return NULL;
|
||||
|
||||
for (fx=0; fx < id_index->nformats; fx++)
|
||||
if (id_index->format[fx] == format)
|
||||
{ formatx = fx; break; }
|
||||
|
||||
if (formatx == -1) {
|
||||
g_warning ("index does not contain format %d", format);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* this is a hack, we should use a private structure instead */
|
||||
sample.format = formatx;
|
||||
sample.value = value;
|
||||
|
||||
exact = _fc_bsearch (id_index->array, &mx, file_index_compare,
|
||||
&sample, id_index);
|
||||
|
||||
if (!exact) {
|
||||
if (method == GST_INDEX_LOOKUP_EXACT)
|
||||
return NULL;
|
||||
else if (method == GST_INDEX_LOOKUP_BEFORE) {
|
||||
if (mx == 0)
|
||||
return NULL;
|
||||
mx -= 1;
|
||||
} else if (method == GST_INDEX_LOOKUP_AFTER) {
|
||||
if (mx == id_index->array->len)
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
row_data = &g_array_index (id_index->array, char, mx);
|
||||
|
||||
// if exact then ignore flags (?)
|
||||
if (method != GST_INDEX_LOOKUP_EXACT)
|
||||
while ((GINT32_FROM_BE (ARRAY_ROW_FLAGS (row_data)) & flags) != flags) {
|
||||
if (method == GST_INDEX_LOOKUP_BEFORE)
|
||||
mx -= 1;
|
||||
else if (method == GST_INDEX_LOOKUP_AFTER)
|
||||
mx += 1;
|
||||
if (mx < 0 || mx >= id_index->array->len)
|
||||
return NULL;
|
||||
row_data = &g_array_index (id_index->array, char, mx);
|
||||
}
|
||||
|
||||
// entry memory management needs improvement
|
||||
if (!fileindex->ret_entry)
|
||||
fileindex->ret_entry = g_new0 (GstIndexEntry, 1);
|
||||
entry = fileindex->ret_entry;
|
||||
if (entry->data.assoc.assocs)
|
||||
g_free (entry->data.assoc.assocs);
|
||||
|
||||
entry->type = GST_INDEX_ENTRY_ASSOCIATION;
|
||||
|
||||
GST_INDEX_NASSOCS (entry) = id_index->nformats;
|
||||
entry->data.assoc.assocs =
|
||||
g_new (GstIndexAssociation, id_index->nformats);
|
||||
|
||||
GST_INDEX_ASSOC_FLAGS (entry) =
|
||||
GINT32_FROM_BE (ARRAY_ROW_FLAGS (row_data));
|
||||
|
||||
for (xx=0; xx < id_index->nformats; xx++)
|
||||
{
|
||||
GST_INDEX_ASSOC_FORMAT (entry, xx) = id_index->format[xx];
|
||||
GST_INDEX_ASSOC_VALUE (entry, xx) =
|
||||
GINT64_FROM_BE (ARRAY_ROW_VALUE (row_data, xx));
|
||||
}
|
||||
|
||||
return entry;
|
||||
}
|
||||
|
||||
//////////////////////////////////////////////////////////////////////
|
||||
// [UNTESTED] i don't understand the following plugin stuff [UNTESTED]
|
||||
//////////////////////////////////////////////////////////////////////
|
||||
|
||||
static gboolean
|
||||
plugin_init (GModule *module, GstPlugin *plugin)
|
||||
{
|
||||
GstIndexFactory *factory;
|
||||
|
||||
gst_plugin_set_longname (plugin, "A file index");
|
||||
|
||||
factory = gst_index_factory_new ("fileindex",
|
||||
"A index that stores entries in file",
|
||||
gst_file_index_get_type());
|
||||
|
||||
if (factory != NULL) {
|
||||
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
|
||||
}
|
||||
else {
|
||||
g_warning ("could not register fileindex");
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
GstPluginDesc plugin_desc2 = {
|
||||
GST_VERSION_MAJOR,
|
||||
GST_VERSION_MINOR,
|
||||
"gstindexs",
|
||||
plugin_init
|
||||
};
|
||||
|
||||
|
|
@ -2,7 +2,7 @@ plugindir = $(libdir)/gstreamer-@GST_MAJORMINOR@
|
|||
|
||||
plugin_LTLIBRARIES = libgstindexers.la
|
||||
|
||||
libgstindexers_la_SOURCES = gstmemindex.c
|
||||
libgstindexers_la_SOURCES = gstmemindex.c gstfileindex.c
|
||||
libgstindexers_la_CFLAGS = $(GST_CFLAGS)
|
||||
libgstindexers_la_LIBADD =
|
||||
libgstindexers_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
|
||||
|
|
|
|||
897
plugins/indexers/gstfileindex.c
Normal file
897
plugins/indexers/gstfileindex.c
Normal file
|
|
@ -0,0 +1,897 @@
|
|||
/* GStreamer
|
||||
* Copyright (C) 2003 Erik Walthinsen <omega@cse.ogi.edu>
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <gst/gst_private.h>
|
||||
#include <gst/gstversion.h>
|
||||
#include <gst/gstplugin.h>
|
||||
#include <gst/gstindex.h>
|
||||
|
||||
#include <unistd.h>
|
||||
#include <sys/mman.h>
|
||||
#include <sys/stat.h>
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
|
||||
#define GST_TYPE_FILE_INDEX \
|
||||
(gst_file_index_get_type ())
|
||||
#define GST_FILE_INDEX(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_FILE_INDEX, GstFileIndex))
|
||||
#define GST_FILE_INDEX_CLASS(klass) \
|
||||
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_FILE_INDEX, GstFileIndexClass))
|
||||
#define GST_IS_FILE_INDEX(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_FILE_INDEX))
|
||||
#define GST_IS_FILE_INDEX_CLASS(obj) \
|
||||
(GST_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_FILE_INDEX))
|
||||
|
||||
/*
|
||||
* Object model:
|
||||
*
|
||||
* We build an index to each entry for each id.
|
||||
*
|
||||
*
|
||||
* fileindex
|
||||
* -----------------------------...
|
||||
* ! !
|
||||
* id1 id2
|
||||
* !
|
||||
* GArray
|
||||
*
|
||||
* The fileindex creates a FileIndexId object for each writer id, a
|
||||
* Hashtable is kept to map the id to the FileIndexId
|
||||
*
|
||||
* The FileIndexId also keeps all the values in a sorted GArray.
|
||||
*
|
||||
* Finding a value for an id/format requires locating the correct GArray,
|
||||
* then do a binary search to get the required value.
|
||||
*
|
||||
* Unlike gstmemindex: All formats are assumed to sort to the
|
||||
* same order. All formats are assumed to be available from
|
||||
* any entry.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Each array element is (32bits flags, nformats * 64bits)
|
||||
*/
|
||||
typedef struct {
|
||||
gint id;
|
||||
gchar *id_desc;
|
||||
gint nformats;
|
||||
GstFormat *format;
|
||||
GArray *array;
|
||||
} GstFileIndexId;
|
||||
|
||||
typedef struct _GstFileIndex GstFileIndex;
|
||||
typedef struct _GstFileIndexClass GstFileIndexClass;
|
||||
|
||||
#define ARRAY_ROW_SIZE(_ii) \
|
||||
(sizeof (gint32) + (_ii)->nformats * sizeof (gint64))
|
||||
#define ARRAY_TOTAL_SIZE(_ii) \
|
||||
(_ii->array->len * ARRAY_ROW_SIZE(_ii))
|
||||
|
||||
// don't forget to convert to/from BE byte-order
|
||||
#define ARRAY_ROW_FLAGS(_row) \
|
||||
(*((gint32*) (_row)))
|
||||
#define ARRAY_ROW_VALUE(_row,_vx) \
|
||||
(*(gint64*) (((gchar*)(_row)) + sizeof (gint32) + (_vx) * sizeof (gint64)))
|
||||
|
||||
struct _GstFileIndex {
|
||||
GstIndex parent;
|
||||
|
||||
gchar *location;
|
||||
gboolean is_loaded;
|
||||
GSList *unresolved;
|
||||
GHashTable *id_index;
|
||||
|
||||
GstIndexEntry *ret_entry; // hack to avoid leaking memory
|
||||
};
|
||||
|
||||
struct _GstFileIndexClass {
|
||||
GstIndexClass parent_class;
|
||||
};
|
||||
|
||||
enum {
|
||||
ARG_0,
|
||||
ARG_LOCATION,
|
||||
};
|
||||
|
||||
static void gst_file_index_class_init (GstFileIndexClass *klass);
|
||||
static void gst_file_index_init (GstFileIndex *index);
|
||||
static void gst_file_index_dispose (GObject *object);
|
||||
|
||||
static void
|
||||
gst_file_index_set_property (GObject *object,
|
||||
guint prop_id,
|
||||
const GValue *value,
|
||||
GParamSpec *pspec);
|
||||
static void
|
||||
gst_file_index_get_property (GObject *object,
|
||||
guint prop_id,
|
||||
GValue *value,
|
||||
GParamSpec *pspec);
|
||||
|
||||
static gboolean
|
||||
gst_file_index_resolve_writer (GstIndex *_index, GstObject *writer,
|
||||
gint *id, gchar **writer_string);
|
||||
|
||||
static void gst_file_index_commit (GstIndex *index, gint writer_id);
|
||||
static void gst_file_index_add_entry (GstIndex *index, GstIndexEntry *entry);
|
||||
static GstIndexEntry* gst_file_index_get_assoc_entry (GstIndex *index, gint id,
|
||||
GstIndexLookupMethod method,
|
||||
GstAssocFlags flags,
|
||||
GstFormat format, gint64 value,
|
||||
GCompareDataFunc func,
|
||||
gpointer user_data);
|
||||
|
||||
#define CLASS(file_index) GST_FILE_INDEX_CLASS (G_OBJECT_GET_CLASS (file_index))
|
||||
|
||||
static GstIndex *parent_class = NULL;
|
||||
|
||||
GType
|
||||
gst_file_index_get_type(void) {
|
||||
static GType file_index_type = 0;
|
||||
|
||||
if (!file_index_type) {
|
||||
static const GTypeInfo file_index_info = {
|
||||
sizeof(GstFileIndexClass),
|
||||
NULL,
|
||||
NULL,
|
||||
(GClassInitFunc)gst_file_index_class_init,
|
||||
NULL,
|
||||
NULL,
|
||||
sizeof(GstFileIndex),
|
||||
1,
|
||||
(GInstanceInitFunc)gst_file_index_init,
|
||||
NULL
|
||||
};
|
||||
file_index_type = g_type_register_static(GST_TYPE_INDEX, "GstFileIndex", &file_index_info, 0);
|
||||
}
|
||||
return file_index_type;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_file_index_class_init (GstFileIndexClass *klass)
|
||||
{
|
||||
GObjectClass *gobject_class;
|
||||
GstIndexClass *gstindex_class;
|
||||
|
||||
gobject_class = (GObjectClass*)klass;
|
||||
gstindex_class = (GstIndexClass*)klass;
|
||||
|
||||
parent_class = g_type_class_ref(GST_TYPE_INDEX);
|
||||
|
||||
gobject_class->dispose = gst_file_index_dispose;
|
||||
gobject_class->set_property = gst_file_index_set_property;
|
||||
gobject_class->get_property = gst_file_index_get_property;
|
||||
|
||||
gstindex_class->add_entry = gst_file_index_add_entry;
|
||||
gstindex_class->get_assoc_entry = gst_file_index_get_assoc_entry;
|
||||
gstindex_class->commit = gst_file_index_commit;
|
||||
gstindex_class->resolve_writer = gst_file_index_resolve_writer;
|
||||
|
||||
g_object_class_install_property (gobject_class, ARG_LOCATION,
|
||||
g_param_spec_string ("location", "File Location",
|
||||
"Location of the index file",
|
||||
NULL, G_PARAM_READWRITE));
|
||||
}
|
||||
|
||||
static void
|
||||
gst_file_index_init (GstFileIndex *index)
|
||||
{
|
||||
GST_DEBUG(0, "created new file index");
|
||||
|
||||
index->id_index = g_hash_table_new (g_int_hash, g_int_equal);
|
||||
}
|
||||
|
||||
static void
|
||||
gst_file_index_dispose (GObject *object)
|
||||
{
|
||||
GstFileIndex *index = GST_FILE_INDEX (object);
|
||||
|
||||
if (index->location)
|
||||
g_free (index->location);
|
||||
|
||||
// need to take care when destroying garrays with mmap'd segments
|
||||
|
||||
G_OBJECT_CLASS (parent_class)->dispose (object);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gst_file_index_resolve_writer (GstIndex *_index, GstObject *writer,
|
||||
gint *id, gchar **writer_string)
|
||||
{
|
||||
GstFileIndex *index = GST_FILE_INDEX (_index);
|
||||
GSList *pending = index->unresolved;
|
||||
gboolean match = FALSE;
|
||||
GSList *elem;
|
||||
|
||||
if (!index->is_loaded)
|
||||
return TRUE;
|
||||
|
||||
g_return_val_if_fail (id, FALSE);
|
||||
g_return_val_if_fail (writer_string, FALSE);
|
||||
g_return_val_if_fail (*writer_string, FALSE);
|
||||
|
||||
index->unresolved = NULL;
|
||||
|
||||
for (elem = pending; elem; elem = g_slist_next (elem)) {
|
||||
GstFileIndexId *ii = elem->data;
|
||||
if (strcmp (ii->id_desc, *writer_string) != 0) {
|
||||
index->unresolved = g_slist_prepend (index->unresolved, ii);
|
||||
continue;
|
||||
}
|
||||
|
||||
if (match) {
|
||||
g_warning ("Duplicate matches for writer '%s'", *writer_string);
|
||||
continue;
|
||||
}
|
||||
|
||||
//g_warning ("resolve %d %s", *id, *writer_string);
|
||||
ii->id = *id;
|
||||
g_hash_table_insert (index->id_index, id, ii);
|
||||
match = TRUE;
|
||||
}
|
||||
|
||||
g_slist_free (pending);
|
||||
|
||||
return match;
|
||||
}
|
||||
|
||||
static void
|
||||
_fc_alloc_array (GstFileIndexId *id_index)
|
||||
{
|
||||
g_assert (!id_index->array);
|
||||
id_index->array =
|
||||
g_array_sized_new (FALSE, FALSE, ARRAY_ROW_SIZE (id_index), 0);
|
||||
}
|
||||
|
||||
static void
|
||||
gst_file_index_load (GstFileIndex *index)
|
||||
{
|
||||
xmlDocPtr doc;
|
||||
xmlNodePtr root, part;
|
||||
xmlChar *val;
|
||||
|
||||
g_assert (index->location);
|
||||
g_return_if_fail (!index->is_loaded);
|
||||
|
||||
{
|
||||
gchar *path = g_strdup_printf ("%s/gstindex.xml", index->location);
|
||||
GError *err = NULL;
|
||||
gchar *buf;
|
||||
gsize len;
|
||||
g_file_get_contents (path, &buf, &len, &err);
|
||||
g_free (path);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
doc = xmlParseMemory (buf, len);
|
||||
g_free (buf);
|
||||
}
|
||||
|
||||
//xmlDocFormatDump (stderr, doc, TRUE);
|
||||
|
||||
root = doc->xmlRootNode;
|
||||
if (strcmp (root->name, "gstfileindex") != 0)
|
||||
g_error ("root node isn't a gstfileindex");
|
||||
|
||||
val = xmlGetProp (root, "version");
|
||||
if (!val || atoi (val) != 1)
|
||||
g_error ("version != 1");
|
||||
free (val);
|
||||
|
||||
for (part = root->children; part; part = part->next) {
|
||||
if (strcmp (part->name, "writers") == 0) {
|
||||
xmlNodePtr writer;
|
||||
for (writer = part->children; writer; writer = writer->next) {
|
||||
xmlChar *datafile = xmlGetProp (writer, "datafile");
|
||||
gchar *path = g_strdup_printf ("%s/%s", index->location, datafile);
|
||||
int fd;
|
||||
GstFileIndexId *id_index;
|
||||
xmlNodePtr wpart;
|
||||
xmlChar *entries_str;
|
||||
gpointer array_data;
|
||||
|
||||
free (datafile);
|
||||
|
||||
fd = open (path, O_RDONLY);
|
||||
g_free (path);
|
||||
if (fd < 0) {
|
||||
g_warning ("Can't open '%s': %s", path, strerror (errno));
|
||||
continue;
|
||||
}
|
||||
|
||||
id_index = g_new0 (GstFileIndexId, 1);
|
||||
id_index->id_desc = xmlGetProp (writer, "id");
|
||||
|
||||
for (wpart = writer->children; wpart; wpart = wpart->next) {
|
||||
if (strcmp (wpart->name, "formats") == 0) {
|
||||
xmlChar *count_str = xmlGetProp (wpart, "count");
|
||||
gint fx=0;
|
||||
xmlNodePtr format;
|
||||
|
||||
id_index->nformats = atoi (count_str);
|
||||
free (count_str);
|
||||
|
||||
id_index->format = g_new (GstFormat, id_index->nformats);
|
||||
|
||||
for (format = wpart->children;
|
||||
format; format = format->next) {
|
||||
xmlChar *nick = xmlGetProp (format, "nick");
|
||||
GstFormat fmt = gst_format_get_by_nick (nick);
|
||||
if (fmt == GST_FORMAT_UNDEFINED)
|
||||
g_error ("format '%s' undefined", nick);
|
||||
g_assert (fx < id_index->nformats);
|
||||
id_index->format[fx++] = fmt;
|
||||
free (nick);
|
||||
}
|
||||
} else
|
||||
g_warning ("unknown wpart '%s'", wpart->name);
|
||||
}
|
||||
|
||||
g_assert (id_index->nformats > 0);
|
||||
_fc_alloc_array (id_index);
|
||||
g_assert (id_index->array->data == NULL); // little bit risky
|
||||
|
||||
entries_str = xmlGetProp (writer, "entries");
|
||||
id_index->array->len = atoi (entries_str);
|
||||
free (entries_str);
|
||||
|
||||
array_data =
|
||||
mmap (NULL, ARRAY_TOTAL_SIZE (id_index), PROT_READ, MAP_SHARED, fd, 0);
|
||||
close (fd);
|
||||
if (array_data == MAP_FAILED) {
|
||||
g_error ("mmap %s failed: %s", path, strerror (errno));
|
||||
continue;
|
||||
}
|
||||
|
||||
id_index->array->data = array_data;
|
||||
|
||||
index->unresolved = g_slist_prepend (index->unresolved, id_index);
|
||||
}
|
||||
} else
|
||||
g_warning ("unknown part '%s'", part->name);
|
||||
}
|
||||
|
||||
xmlFreeDoc (doc);
|
||||
|
||||
GST_FLAG_UNSET (index, GST_INDEX_WRITABLE);
|
||||
index->is_loaded = TRUE;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_file_index_set_property (GObject *object,
|
||||
guint prop_id,
|
||||
const GValue *value,
|
||||
GParamSpec *pspec)
|
||||
{
|
||||
GstFileIndex *index = GST_FILE_INDEX (object);
|
||||
|
||||
switch (prop_id) {
|
||||
case ARG_LOCATION:
|
||||
if (index->location)
|
||||
g_free (index->location);
|
||||
index->location = g_value_dup_string (value);
|
||||
|
||||
if (index->location && !g_hash_table_size (index->id_index))
|
||||
gst_file_index_load (index);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
gst_file_index_get_property (GObject *object,
|
||||
guint prop_id,
|
||||
GValue *value,
|
||||
GParamSpec *pspec)
|
||||
{
|
||||
GstFileIndex *index = GST_FILE_INDEX (object);
|
||||
|
||||
switch (prop_id) {
|
||||
case ARG_LOCATION:
|
||||
g_value_set_string (value, index->location);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
_file_index_id_save_xml (gpointer _key, GstFileIndexId *ii, xmlNodePtr writers)
|
||||
{
|
||||
const gint bufsize = 16;
|
||||
gchar buf[bufsize];
|
||||
xmlNodePtr writer;
|
||||
xmlNodePtr formats;
|
||||
gint xx;
|
||||
|
||||
writer = xmlNewChild (writers, NULL, "writer", NULL);
|
||||
xmlSetProp (writer, "id", ii->id_desc);
|
||||
g_snprintf (buf, bufsize, "%d", ii->array->len);
|
||||
xmlSetProp (writer, "entries", buf);
|
||||
g_snprintf (buf, bufsize, "%d", ii->id); // any unique number is OK
|
||||
xmlSetProp (writer, "datafile", buf);
|
||||
|
||||
formats = xmlNewChild (writer, NULL, "formats", NULL);
|
||||
g_snprintf (buf, bufsize, "%d", ii->nformats);
|
||||
xmlSetProp (formats, "count", buf);
|
||||
|
||||
for (xx=0; xx < ii->nformats; xx++) {
|
||||
xmlNodePtr format = xmlNewChild (formats, NULL, "format", NULL);
|
||||
const GstFormatDefinition* def =
|
||||
gst_format_get_details (ii->format[xx]);
|
||||
xmlSetProp (format, "nick", def->nick);
|
||||
}
|
||||
}
|
||||
|
||||
//
|
||||
// We must save the binary data in separate files because
|
||||
// mmap wants getpagesize() alignment. If we append all
|
||||
// the data to one file then we don't know the appropriate
|
||||
// padding since the page size isn't fixed.
|
||||
//
|
||||
static void
|
||||
_file_index_id_save_entries (gpointer *_key,
|
||||
GstFileIndexId *ii,
|
||||
gchar *prefix)
|
||||
{
|
||||
GError *err = NULL;
|
||||
gchar *path = g_strdup_printf ("%s/%d", prefix, ii->id);
|
||||
GIOChannel *chan =
|
||||
g_io_channel_new_file (path, "w", &err);
|
||||
g_free (path);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
g_io_channel_set_encoding (chan, NULL, &err);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
g_io_channel_write_chars (chan,
|
||||
ii->array->data,
|
||||
ARRAY_TOTAL_SIZE (ii),
|
||||
NULL,
|
||||
&err);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
g_io_channel_shutdown (chan, TRUE, &err);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
g_io_channel_unref (chan);
|
||||
}
|
||||
|
||||
// We have to save the whole set of indexes into a single file
|
||||
// so it doesn't make sense to commit only a single writer.
|
||||
//
|
||||
// i suggest:
|
||||
//
|
||||
// gst_index_commit (index, -1);
|
||||
|
||||
static void
|
||||
gst_file_index_commit (GstIndex *_index, gint _writer_id)
|
||||
{
|
||||
GstFileIndex *index = GST_FILE_INDEX (_index);
|
||||
xmlDocPtr doc;
|
||||
xmlNodePtr writers;
|
||||
GError *err = NULL;
|
||||
gchar *path;
|
||||
GIOChannel *tocfile;
|
||||
|
||||
g_return_if_fail (index->location);
|
||||
g_return_if_fail (!index->is_loaded);
|
||||
|
||||
GST_FLAG_UNSET (index, GST_INDEX_WRITABLE);
|
||||
|
||||
doc = xmlNewDoc ("1.0");
|
||||
doc->xmlRootNode = xmlNewDocNode (doc, NULL, "gstfileindex", NULL);
|
||||
xmlSetProp (doc->xmlRootNode, "version", "1");
|
||||
|
||||
writers = xmlNewChild (doc->xmlRootNode, NULL, "writers", NULL);
|
||||
g_hash_table_foreach (index->id_index,
|
||||
(GHFunc) _file_index_id_save_xml, writers);
|
||||
|
||||
if (mkdir (index->location, 0777) &&
|
||||
errno != EEXIST)
|
||||
g_error ("mkdir %s: %s", index->location, strerror (errno));
|
||||
|
||||
path = g_strdup_printf ("%s/gstindex.xml", index->location);
|
||||
tocfile =
|
||||
g_io_channel_new_file (path, "w", &err);
|
||||
g_free (path);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
g_io_channel_set_encoding (tocfile, NULL, &err);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
{
|
||||
xmlChar *xmlmem;
|
||||
int xmlsize;
|
||||
xmlDocDumpMemory (doc, &xmlmem, &xmlsize);
|
||||
g_io_channel_write_chars (tocfile, xmlmem, xmlsize, NULL, &err);
|
||||
if (err) g_error ("%s", err->message);
|
||||
xmlFreeDoc (doc);
|
||||
free (xmlmem);
|
||||
}
|
||||
|
||||
g_io_channel_shutdown (tocfile, TRUE, &err);
|
||||
if (err) g_error ("%s", err->message);
|
||||
|
||||
g_io_channel_unref (tocfile);
|
||||
|
||||
g_hash_table_foreach (index->id_index,
|
||||
(GHFunc) _file_index_id_save_entries,
|
||||
index->location);
|
||||
}
|
||||
|
||||
static void
|
||||
gst_file_index_add_id (GstIndex *index, GstIndexEntry *entry)
|
||||
{
|
||||
GstFileIndex *fileindex = GST_FILE_INDEX (index);
|
||||
GstFileIndexId *id_index;
|
||||
|
||||
id_index = g_hash_table_lookup (fileindex->id_index, &entry->id);
|
||||
|
||||
if (!id_index) {
|
||||
id_index = g_new0 (GstFileIndexId, 1);
|
||||
|
||||
id_index->id = entry->id;
|
||||
id_index->id_desc = g_strdup (entry->data.id.description);
|
||||
|
||||
// It would be useful to know the GType of the writer so
|
||||
// we can try to cope with changes in the id_desc path.
|
||||
|
||||
g_hash_table_insert (fileindex->id_index, &entry->id, id_index);
|
||||
}
|
||||
}
|
||||
|
||||
// This algorithm differs from libc bsearch in the handling
|
||||
// of non-exact matches.
|
||||
|
||||
static gboolean
|
||||
_fc_bsearch (GArray * ary,
|
||||
gint * ret,
|
||||
GCompareDataFunc compare,
|
||||
gconstpointer sample,
|
||||
gpointer user_data)
|
||||
{
|
||||
gint first, last;
|
||||
gint mid;
|
||||
gint midsize;
|
||||
gint cmp;
|
||||
gint tx;
|
||||
|
||||
g_return_val_if_fail (compare, FALSE);
|
||||
|
||||
if (!ary->len)
|
||||
{
|
||||
if (ret) *ret = 0;
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
first = 0;
|
||||
last = ary->len - 1;
|
||||
|
||||
midsize = last - first;
|
||||
|
||||
while (midsize > 1) {
|
||||
mid = first + midsize / 2;
|
||||
|
||||
cmp = (*compare) (sample, &g_array_index (ary, char, mid), user_data);
|
||||
|
||||
if (cmp == 0)
|
||||
{
|
||||
// if there are multiple matches then scan for the first match
|
||||
while (mid > 0 &&
|
||||
(*compare) (sample,
|
||||
&g_array_index (ary, char, mid - 1),
|
||||
user_data) == 0)
|
||||
--mid;
|
||||
|
||||
if (ret) *ret = mid;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
if (cmp < 0)
|
||||
last = mid-1;
|
||||
else
|
||||
first = mid+1;
|
||||
|
||||
midsize = last - first;
|
||||
}
|
||||
|
||||
for (tx = first; tx <= last; tx++)
|
||||
{
|
||||
cmp = (*compare) (sample, &g_array_index (ary, char, tx), user_data);
|
||||
|
||||
if (cmp < 0)
|
||||
{
|
||||
if (ret) *ret = tx;
|
||||
return FALSE;
|
||||
}
|
||||
if (cmp == 0)
|
||||
{
|
||||
if (ret) *ret = tx;
|
||||
return TRUE;
|
||||
}
|
||||
}
|
||||
|
||||
if (ret) *ret = last+1;
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
static gint
|
||||
file_index_compare (gconstpointer sample,
|
||||
gconstpointer row,
|
||||
gpointer user_data)
|
||||
{
|
||||
//GstFileIndexId *id_index = user_data;
|
||||
const GstIndexAssociation *ca = sample;
|
||||
gint64 val1 = ca->value;
|
||||
gint64 val2 = GINT64_FROM_BE (ARRAY_ROW_VALUE (row, ca->format));
|
||||
gint64 diff = val2 - val1;
|
||||
return (diff == 0 ? 0 : (diff > 0 ? 1 : -1));
|
||||
}
|
||||
|
||||
static void
|
||||
gst_file_index_add_association (GstIndex *index, GstIndexEntry *entry)
|
||||
{
|
||||
GstFileIndex *fileindex = GST_FILE_INDEX (index);
|
||||
GstFileIndexId *id_index;
|
||||
gint mx;
|
||||
GstIndexAssociation sample;
|
||||
gboolean exact;
|
||||
gint fx;
|
||||
|
||||
id_index = g_hash_table_lookup (fileindex->id_index, &entry->id);
|
||||
if (!id_index)
|
||||
return;
|
||||
|
||||
if (!id_index->nformats) {
|
||||
gint fx;
|
||||
id_index->nformats = GST_INDEX_NASSOCS (entry);
|
||||
//g_warning ("%d: formats = %d", entry->id, id_index->nformats);
|
||||
id_index->format = g_new (GstFormat, id_index->nformats);
|
||||
for (fx=0; fx < id_index->nformats; fx++)
|
||||
id_index->format[fx] = GST_INDEX_ASSOC_FORMAT (entry, fx);
|
||||
_fc_alloc_array (id_index);
|
||||
} else {
|
||||
/* only sanity checking */
|
||||
if (id_index->nformats != GST_INDEX_NASSOCS (entry))
|
||||
g_warning ("fileindex arity change %d -> %d",
|
||||
id_index->nformats, GST_INDEX_NASSOCS (entry));
|
||||
else {
|
||||
gint fx;
|
||||
for (fx=0; fx < id_index->nformats; fx++)
|
||||
if (id_index->format[fx] != GST_INDEX_ASSOC_FORMAT (entry, fx))
|
||||
g_warning ("fileindex format[%d] changed %d -> %d",
|
||||
fx,
|
||||
id_index->format[fx],
|
||||
GST_INDEX_ASSOC_FORMAT (entry, fx));
|
||||
}
|
||||
}
|
||||
|
||||
/* this is a hack, we should use a private structure instead */
|
||||
sample.format = 0;
|
||||
sample.value = GST_INDEX_ASSOC_VALUE (entry, 0);
|
||||
|
||||
exact =
|
||||
_fc_bsearch (id_index->array, &mx, file_index_compare,
|
||||
&sample, id_index);
|
||||
|
||||
if (exact) {
|
||||
// maybe overwrite instead?
|
||||
g_warning ("ignoring duplicate index association at %lld",
|
||||
GST_INDEX_ASSOC_VALUE (entry, 0));
|
||||
return;
|
||||
}
|
||||
|
||||
// should verify that all formats are ordered XXX
|
||||
|
||||
{
|
||||
gchar row_data[ARRAY_ROW_SIZE (id_index)];
|
||||
|
||||
ARRAY_ROW_FLAGS (row_data) =
|
||||
GINT32_TO_BE (GST_INDEX_ASSOC_FLAGS (entry));
|
||||
|
||||
for (fx = 0; fx < id_index->nformats; fx++)
|
||||
ARRAY_ROW_VALUE (row_data, fx) =
|
||||
GINT64_TO_BE (GST_INDEX_ASSOC_VALUE (entry, fx));
|
||||
|
||||
g_array_insert_val (id_index->array, mx, row_data);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
static void
|
||||
show_entry (GstIndexEntry *entry)
|
||||
{
|
||||
switch (entry->type) {
|
||||
case GST_INDEX_ENTRY_ID:
|
||||
g_print ("id %d describes writer %s\n", entry->id,
|
||||
GST_INDEX_ID_DESCRIPTION (entry));
|
||||
break;
|
||||
case GST_INDEX_ENTRY_FORMAT:
|
||||
g_print ("%d: registered format %d for %s\n", entry->id,
|
||||
GST_INDEX_FORMAT_FORMAT (entry),
|
||||
GST_INDEX_FORMAT_KEY (entry));
|
||||
break;
|
||||
case GST_INDEX_ENTRY_ASSOCIATION:
|
||||
{
|
||||
gint i;
|
||||
|
||||
g_print ("%d: %08x ", entry->id, GST_INDEX_ASSOC_FLAGS (entry));
|
||||
for (i = 0; i < GST_INDEX_NASSOCS (entry); i++) {
|
||||
g_print ("%d %lld ", GST_INDEX_ASSOC_FORMAT (entry, i),
|
||||
GST_INDEX_ASSOC_VALUE (entry, i));
|
||||
}
|
||||
g_print ("\n");
|
||||
break;
|
||||
}
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
*/
|
||||
|
||||
static void
|
||||
gst_file_index_add_entry (GstIndex *index, GstIndexEntry *entry)
|
||||
{
|
||||
GstFileIndex *fileindex = GST_FILE_INDEX (index);
|
||||
|
||||
GST_DEBUG (0, "adding entry %p\n", fileindex);
|
||||
|
||||
//show_entry (entry);
|
||||
|
||||
switch (entry->type){
|
||||
case GST_INDEX_ENTRY_ID:
|
||||
gst_file_index_add_id (index, entry);
|
||||
break;
|
||||
case GST_INDEX_ENTRY_ASSOCIATION:
|
||||
gst_file_index_add_association (index, entry);
|
||||
break;
|
||||
case GST_INDEX_ENTRY_OBJECT:
|
||||
g_error ("gst_file_index_add_object not implemented");
|
||||
break;
|
||||
case GST_INDEX_ENTRY_FORMAT:
|
||||
g_warning ("gst_file_index_add_format not implemented");
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static GstIndexEntry*
|
||||
gst_file_index_get_assoc_entry (GstIndex *index,
|
||||
gint id,
|
||||
GstIndexLookupMethod method,
|
||||
GstAssocFlags flags,
|
||||
GstFormat format,
|
||||
gint64 value,
|
||||
GCompareDataFunc _ignore_func,
|
||||
gpointer _ignore_user_data)
|
||||
{
|
||||
GstFileIndex *fileindex = GST_FILE_INDEX (index);
|
||||
GstFileIndexId *id_index;
|
||||
gint formatx = -1;
|
||||
gint fx;
|
||||
GstIndexAssociation sample;
|
||||
gint mx;
|
||||
gboolean exact;
|
||||
gpointer row_data;
|
||||
GstIndexEntry *entry;
|
||||
gint xx;
|
||||
|
||||
id_index = g_hash_table_lookup (fileindex->id_index, &id);
|
||||
if (!id_index)
|
||||
return NULL;
|
||||
|
||||
for (fx=0; fx < id_index->nformats; fx++)
|
||||
if (id_index->format[fx] == format)
|
||||
{ formatx = fx; break; }
|
||||
|
||||
if (formatx == -1) {
|
||||
g_warning ("index does not contain format %d", format);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* this is a hack, we should use a private structure instead */
|
||||
sample.format = formatx;
|
||||
sample.value = value;
|
||||
|
||||
exact = _fc_bsearch (id_index->array, &mx, file_index_compare,
|
||||
&sample, id_index);
|
||||
|
||||
if (!exact) {
|
||||
if (method == GST_INDEX_LOOKUP_EXACT)
|
||||
return NULL;
|
||||
else if (method == GST_INDEX_LOOKUP_BEFORE) {
|
||||
if (mx == 0)
|
||||
return NULL;
|
||||
mx -= 1;
|
||||
} else if (method == GST_INDEX_LOOKUP_AFTER) {
|
||||
if (mx == id_index->array->len)
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
row_data = &g_array_index (id_index->array, char, mx);
|
||||
|
||||
// if exact then ignore flags (?)
|
||||
if (method != GST_INDEX_LOOKUP_EXACT)
|
||||
while ((GINT32_FROM_BE (ARRAY_ROW_FLAGS (row_data)) & flags) != flags) {
|
||||
if (method == GST_INDEX_LOOKUP_BEFORE)
|
||||
mx -= 1;
|
||||
else if (method == GST_INDEX_LOOKUP_AFTER)
|
||||
mx += 1;
|
||||
if (mx < 0 || mx >= id_index->array->len)
|
||||
return NULL;
|
||||
row_data = &g_array_index (id_index->array, char, mx);
|
||||
}
|
||||
|
||||
// entry memory management needs improvement
|
||||
if (!fileindex->ret_entry)
|
||||
fileindex->ret_entry = g_new0 (GstIndexEntry, 1);
|
||||
entry = fileindex->ret_entry;
|
||||
if (entry->data.assoc.assocs)
|
||||
g_free (entry->data.assoc.assocs);
|
||||
|
||||
entry->type = GST_INDEX_ENTRY_ASSOCIATION;
|
||||
|
||||
GST_INDEX_NASSOCS (entry) = id_index->nformats;
|
||||
entry->data.assoc.assocs =
|
||||
g_new (GstIndexAssociation, id_index->nformats);
|
||||
|
||||
GST_INDEX_ASSOC_FLAGS (entry) =
|
||||
GINT32_FROM_BE (ARRAY_ROW_FLAGS (row_data));
|
||||
|
||||
for (xx=0; xx < id_index->nformats; xx++)
|
||||
{
|
||||
GST_INDEX_ASSOC_FORMAT (entry, xx) = id_index->format[xx];
|
||||
GST_INDEX_ASSOC_VALUE (entry, xx) =
|
||||
GINT64_FROM_BE (ARRAY_ROW_VALUE (row_data, xx));
|
||||
}
|
||||
|
||||
return entry;
|
||||
}
|
||||
|
||||
//////////////////////////////////////////////////////////////////////
|
||||
// [UNTESTED] i don't understand the following plugin stuff [UNTESTED]
|
||||
//////////////////////////////////////////////////////////////////////
|
||||
|
||||
static gboolean
|
||||
plugin_init (GModule *module, GstPlugin *plugin)
|
||||
{
|
||||
GstIndexFactory *factory;
|
||||
|
||||
gst_plugin_set_longname (plugin, "A file index");
|
||||
|
||||
factory = gst_index_factory_new ("fileindex",
|
||||
"A index that stores entries in file",
|
||||
gst_file_index_get_type());
|
||||
|
||||
if (factory != NULL) {
|
||||
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
|
||||
}
|
||||
else {
|
||||
g_warning ("could not register fileindex");
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
GstPluginDesc plugin_desc2 = {
|
||||
GST_VERSION_MAJOR,
|
||||
GST_VERSION_MINOR,
|
||||
"gstindexs",
|
||||
plugin_init
|
||||
};
|
||||
|
||||
Loading…
Reference in a new issue