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zbar: Make scanner cache optional

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Kaj-Michael Lang 2010-09-28 18:21:57 +03:00 committed by Stefan Kost
parent 5433fd062b
commit 18c3302608
2 changed files with 23 additions and 5 deletions
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27
ext/zbar/gstzbar.c
View file

@ -102,6 +102,7 @@ enum
{ {
PROP_0, PROP_0,
PROP_MESSAGE, PROP_MESSAGE,
PROP_CACHE,
}; };
#define DEFAULT_PROP_ZBAR 1 #define DEFAULT_PROP_ZBAR 1
@ -170,6 +171,11 @@ gst_zbar_class_init (GstZBarClass * g_class)
"Post a barcode message for each detected code", "Post a barcode message for each detected code",
TRUE, G_PARAM_READWRITE)); TRUE, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_CACHE,
g_param_spec_boolean ("cache", "cache",
"Enable or disable the inter-image result cache",
TRUE, G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY));
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_zbar_set_caps); trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_zbar_set_caps);
trans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_zbar_transform_ip); trans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_zbar_transform_ip);
trans_class->start = GST_DEBUG_FUNCPTR (gst_zbar_start); trans_class->start = GST_DEBUG_FUNCPTR (gst_zbar_start);
@ -179,6 +185,7 @@ gst_zbar_class_init (GstZBarClass * g_class)
static void static void
gst_zbar_init (GstZBar * zbar, GstZBarClass * g_class) gst_zbar_init (GstZBar * zbar, GstZBarClass * g_class)
{ {
zbar->cache = TRUE;
zbar->message = TRUE; zbar->message = TRUE;
zbar->scanner = zbar_image_scanner_create (); zbar->scanner = zbar_image_scanner_create ();
@ -204,6 +211,9 @@ gst_zbar_set_property (GObject * object, guint prop_id, const GValue * value,
zbar = GST_ZBAR (object); zbar = GST_ZBAR (object);
switch (prop_id) { switch (prop_id) {
case PROP_CACHE:
zbar->cache = g_value_get_boolean (value);
break;
case PROP_MESSAGE: case PROP_MESSAGE:
zbar->message = g_value_get_boolean (value); zbar->message = g_value_get_boolean (value);
break; break;
@ -223,6 +233,9 @@ gst_zbar_get_property (GObject * object, guint prop_id, GValue * value,
zbar = GST_ZBAR (object); zbar = GST_ZBAR (object);
switch (prop_id) { switch (prop_id) {
case PROP_CACHE:
g_value_set_boolean (value, zbar->cache);
break;
case PROP_MESSAGE: case PROP_MESSAGE:
g_value_set_boolean (value, zbar->message); g_value_set_boolean (value, zbar->message);
break; break;
@ -274,6 +287,8 @@ gst_zbar_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
/* scan the image for barcodes */ /* scan the image for barcodes */
n = zbar_scan_image (zbar->scanner, image); n = zbar_scan_image (zbar->scanner, image);
if (n == 0)
goto out;
/* extract results */ /* extract results */
symbol = zbar_image_first_symbol (image); symbol = zbar_image_first_symbol (image);
@ -285,7 +300,7 @@ gst_zbar_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
GST_DEBUG_OBJECT (zbar, "decoded %s symbol \"%s\" at quality %d", GST_DEBUG_OBJECT (zbar, "decoded %s symbol \"%s\" at quality %d",
zbar_get_symbol_name (typ), data, quality); zbar_get_symbol_name (typ), data, quality);
if (zbar_symbol_get_count (symbol) != 0) if (zbar->cache && zbar_symbol_get_count (symbol) != 0)
continue; continue;
if (zbar->message) { if (zbar->message) {
@ -302,7 +317,9 @@ gst_zbar_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
} }
} }
out:
/* clean up */ /* clean up */
zbar_image_scanner_recycle_image (zbar->scanner, image);
zbar_image_destroy (image); zbar_image_destroy (image);
done: done:
@ -316,8 +333,8 @@ gst_zbar_start (GstBaseTransform * base)
{ {
GstZBar *zbar = GST_ZBAR (base); GstZBar *zbar = GST_ZBAR (base);
/* start the cache (e.g. for filtering dupes) */ /* start the cache if enabled (e.g. for filtering dupes) */
zbar_image_scanner_enable_cache (zbar->scanner, TRUE); zbar_image_scanner_enable_cache (zbar->scanner, zbar->cache);
return TRUE; return TRUE;
} }
@ -327,8 +344,8 @@ gst_zbar_stop (GstBaseTransform * base)
{ {
GstZBar *zbar = GST_ZBAR (base); GstZBar *zbar = GST_ZBAR (base);
/* stop the cache (e.g. for filtering dupes) */ /* stop the cache if enabled (e.g. for filtering dupes) */
zbar_image_scanner_enable_cache (zbar->scanner, FALSE); zbar_image_scanner_enable_cache (zbar->scanner, zbar->cache);
return TRUE; return TRUE;
} }

1
ext/zbar/gstzbar.h
View file

@ -56,6 +56,7 @@ struct _GstZBar
/* properties */ /* properties */
gboolean message; gboolean message;
gboolean cache;
/* internals */ /* internals */
zbar_image_scanner_t *scanner; zbar_image_scanner_t *scanner;