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splitfilesrc: Implement binary search in find_part_for_offset

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Implement binary search using gst_util_array_binary_search

https://bugzilla.gnome.org/show_bug.cgi?id=749690
This commit is contained in:
Jimmy Ohn 2015-05-23 01:03:18 +09:00 committed by Jan Schmidt
parent 565cd49643
commit d3997773fc
1 changed files with 24 additions and 11 deletions
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35
gst/multifile/gstsplitfilesrc.c
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@ -368,24 +368,37 @@ gst_split_file_src_stop (GstBaseSrc * basesrc)
return TRUE; return TRUE;
} }
static gint
gst_split_file_src_part_search (GstFilePart * part, guint64 * offset,
gpointer user_data)
{
if (*offset > part->stop)
return -1; /* The target is after this part */
else if (*offset < part->start)
return 1; /* The target is before this part */
else
return 0; /* This is the target part */
}
static gboolean static gboolean
gst_split_file_src_find_part_for_offset (GstSplitFileSrc * src, guint64 offset, gst_split_file_src_find_part_for_offset (GstSplitFileSrc * src, guint64 offset,
guint * part_number) guint * part_number)
{ {
gboolean res = TRUE;
GstFilePart *part; GstFilePart *part;
guint i;
/* TODO: could use gst_util_array_binary_search() here */ part =
part = src->parts; gst_util_array_binary_search (src->parts, src->num_parts,
for (i = 0; i < src->num_parts; ++i) { sizeof (GstFilePart),
if (offset >= part->start && offset <= part->stop) { (GCompareDataFunc) gst_split_file_src_part_search,
*part_number = i; GST_SEARCH_MODE_AFTER, &offset, NULL);
return TRUE;
}
++part;
}
return FALSE; if (part)
*part_number = part - src->parts;
else
res = FALSE;
return res;
} }
static GstFlowReturn static GstFlowReturn