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gst/base/gsttypefindhelper.c: Check whether we have the requested data already in our list of cached buffers before p...

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Original commit message from CVS:
* gst/base/gsttypefindhelper.c: (helper_find_peek),
(gst_type_find_helper):
Check whether we have the requested data already in our list of
cached buffers before pulling a new buffer; also make the buffer
list a GSList. Speeds up typefinding by ca. 5-10% altogether.
This commit is contained in:
Tim-Philipp Müller 2005-10-10 10:43:15 +00:00
parent 2b7c3ac5e5
commit b846fed997
3 changed files with 50 additions and 16 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2005-10-10 Tim-Philipp Müller <tim at centricular dot net>
* gst/base/gsttypefindhelper.c: (helper_find_peek),
(gst_type_find_helper):
Check whether we have the requested data already in our list of
cached buffers before pulling a new buffer; also make the buffer
list a GSList. Speeds up typefinding by ca. 5-10% altogether.
2005-10-10 Thomas Vander Stichele <thomas at apestaart dot org>
* gst/gstcaps.c:

29
gst/base/gsttypefindhelper.c
View file

@ -38,7 +38,7 @@ typedef struct
guint best_probability;
GstCaps *caps;
guint64 size;
GList *buffers;
GSList *buffers;
GstTypeFindFactory *factory;
}
GstTypeFindHelper;
@ -67,8 +67,20 @@ helper_find_peek (gpointer data, gint64 offset, guint size)
offset += find->size;
}
/* TODO: is it worth checking our list of buffers for
* a match before pulling a new buffer via _getrange()? */
/* see if we have a matching buffer already in our list */
if (size > 0) {
GSList *walk;
for (walk = find->buffers; walk; walk = walk->next) {
GstBuffer *buf = GST_BUFFER_CAST (walk->data);
guint64 buf_offset = GST_BUFFER_OFFSET (buf);
guint buf_size = GST_BUFFER_SIZE (buf);
if (buf_offset <= offset && (offset + size) < (buf_offset + buf_size))
return GST_BUFFER_DATA (buf) + (offset - buf_offset);
}
}
buffer = NULL;
ret = GST_PAD_GETRANGEFUNC (src) (src, offset, size, &buffer);
@ -81,12 +93,12 @@ helper_find_peek (gpointer data, gint64 offset, guint size)
GST_DEBUG ("droping short buffer: %" G_GUINT64_FORMAT "-%" G_GUINT64_FORMAT
" instead of %" G_GUINT64_FORMAT "-%" G_GUINT64_FORMAT,
GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer) +
GST_BUFFER_SIZE (buffer), offset, offset + size);
GST_BUFFER_SIZE (buffer) - 1, offset, offset + size - 1);
gst_buffer_unref (buffer);
return NULL;
}
find->buffers = g_list_prepend (find->buffers, buffer);
find->buffers = g_slist_prepend (find->buffers, buffer);
return GST_BUFFER_DATA (buffer);
error:
@ -118,6 +130,7 @@ gst_type_find_helper (GstPad * src, guint64 size)
{
GstTypeFind gst_find;
GstTypeFindHelper find;
GSList *l;
GList *walk, *type_list = NULL;
GstCaps *result = NULL;
@ -150,9 +163,9 @@ gst_type_find_helper (GstPad * src, guint64 size)
if (find.best_probability > 0)
result = find.caps;
for (walk = find.buffers; walk; walk = walk->next)
gst_buffer_unref (GST_BUFFER (walk->data));
g_list_free (find.buffers);
for (l = find.buffers; l; l = l->next)
gst_buffer_unref (GST_BUFFER_CAST (l->data));
g_slist_free (find.buffers);
return result;
}

29
libs/gst/base/gsttypefindhelper.c
View file

@ -38,7 +38,7 @@ typedef struct
guint best_probability;
GstCaps *caps;
guint64 size;
GList *buffers;
GSList *buffers;
GstTypeFindFactory *factory;
}
GstTypeFindHelper;
@ -67,8 +67,20 @@ helper_find_peek (gpointer data, gint64 offset, guint size)
offset += find->size;
}
/* TODO: is it worth checking our list of buffers for
* a match before pulling a new buffer via _getrange()? */
/* see if we have a matching buffer already in our list */
if (size > 0) {
GSList *walk;
for (walk = find->buffers; walk; walk = walk->next) {
GstBuffer *buf = GST_BUFFER_CAST (walk->data);
guint64 buf_offset = GST_BUFFER_OFFSET (buf);
guint buf_size = GST_BUFFER_SIZE (buf);
if (buf_offset <= offset && (offset + size) < (buf_offset + buf_size))
return GST_BUFFER_DATA (buf) + (offset - buf_offset);
}
}
buffer = NULL;
ret = GST_PAD_GETRANGEFUNC (src) (src, offset, size, &buffer);
@ -81,12 +93,12 @@ helper_find_peek (gpointer data, gint64 offset, guint size)
GST_DEBUG ("droping short buffer: %" G_GUINT64_FORMAT "-%" G_GUINT64_FORMAT
" instead of %" G_GUINT64_FORMAT "-%" G_GUINT64_FORMAT,
GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer) +
GST_BUFFER_SIZE (buffer), offset, offset + size);
GST_BUFFER_SIZE (buffer) - 1, offset, offset + size - 1);
gst_buffer_unref (buffer);
return NULL;
}
find->buffers = g_list_prepend (find->buffers, buffer);
find->buffers = g_slist_prepend (find->buffers, buffer);
return GST_BUFFER_DATA (buffer);
error:
@ -118,6 +130,7 @@ gst_type_find_helper (GstPad * src, guint64 size)
{
GstTypeFind gst_find;
GstTypeFindHelper find;
GSList *l;
GList *walk, *type_list = NULL;
GstCaps *result = NULL;
@ -150,9 +163,9 @@ gst_type_find_helper (GstPad * src, guint64 size)
if (find.best_probability > 0)
result = find.caps;
for (walk = find.buffers; walk; walk = walk->next)
gst_buffer_unref (GST_BUFFER (walk->data));
g_list_free (find.buffers);
for (l = find.buffers; l; l = l->next)
gst_buffer_unref (GST_BUFFER_CAST (l->data));
g_slist_free (find.buffers);
return result;
}