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zbar: cleanups

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Use start/stop to manage the cache. Few code cleanups and comments.
This commit is contained in:
Stefan Kost 2009-10-02 11:22:48 +03:00
parent 9c4fd17edd
commit 0ac7f9fcd9
1 changed files with 33 additions and 15 deletions
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48
ext/zbar/gstzbar.c
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@ -100,6 +100,8 @@ static gboolean gst_zbar_set_caps (GstBaseTransform * base, GstCaps * incaps,
GstCaps * outcaps); GstCaps * outcaps);
static GstFlowReturn gst_zbar_transform_ip (GstBaseTransform * transform, static GstFlowReturn gst_zbar_transform_ip (GstBaseTransform * transform,
GstBuffer * buf); GstBuffer * buf);
static gboolean gst_zbar_start (GstBaseTransform * base);
static gboolean gst_zbar_stop (GstBaseTransform * base);
GST_BOILERPLATE (GstZBar, gst_zbar, GstVideoFilter, GST_TYPE_VIDEO_FILTER); GST_BOILERPLATE (GstZBar, gst_zbar, GstVideoFilter, GST_TYPE_VIDEO_FILTER);
@ -132,14 +134,14 @@ gst_zbar_class_init (GstZBarClass * g_class)
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_stop);
} }
static void static void
gst_zbar_init (GstZBar * zbar, GstZBarClass * g_class) gst_zbar_init (GstZBar * zbar, GstZBarClass * g_class)
{ {
zbar->scanner = zbar_image_scanner_create (); zbar->scanner = zbar_image_scanner_create ();
/* FIXME: do this in start/stop vmethods */
zbar_image_scanner_enable_cache (zbar->scanner, TRUE);
} }
static void static void
@ -187,38 +189,31 @@ gst_zbar_get_property (GObject * object, guint prop_id, GValue * value,
static gboolean static gboolean
gst_zbar_set_caps (GstBaseTransform * base, GstCaps * incaps, GstCaps * outcaps) gst_zbar_set_caps (GstBaseTransform * base, GstCaps * incaps, GstCaps * outcaps)
{ {
GstZBar *this; GstZBar *zbar = GST_ZBAR (base);
GstStructure *structure; GstStructure *structure;
gboolean res; gboolean res;
this = GST_ZBAR (base); GST_DEBUG_OBJECT (zbar,
GST_DEBUG_OBJECT (this,
"set_caps: in %" GST_PTR_FORMAT " out %" GST_PTR_FORMAT, incaps, outcaps); "set_caps: in %" GST_PTR_FORMAT " out %" GST_PTR_FORMAT, incaps, outcaps);
structure = gst_caps_get_structure (incaps, 0); structure = gst_caps_get_structure (incaps, 0);
res = gst_structure_get_int (structure, "width", &this->width); res = gst_structure_get_int (structure, "width", &zbar->width);
res &= gst_structure_get_int (structure, "height", &this->height); res &= gst_structure_get_int (structure, "height", &zbar->height);
if (!res)
goto done;
done:
return res; return res;
} }
static GstFlowReturn static GstFlowReturn
gst_zbar_transform_ip (GstBaseTransform * base, GstBuffer * outbuf) gst_zbar_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
{ {
GstZBar *zbar; GstZBar *zbar = GST_ZBAR (base);
guint8 *data; guint8 *data;
guint size; guint size;
zbar_image_t *image; zbar_image_t *image;
const zbar_symbol_t *symbol; const zbar_symbol_t *symbol;
int n; int n;
zbar = GST_ZBAR (base);
if (base->passthrough) if (base->passthrough)
goto done; goto done;
@ -241,19 +236,42 @@ gst_zbar_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
/* do something useful with results */ /* do something useful with results */
zbar_symbol_type_t typ = zbar_symbol_get_type (symbol); zbar_symbol_type_t typ = zbar_symbol_get_type (symbol);
const char *data = zbar_symbol_get_data (symbol); const char *data = zbar_symbol_get_data (symbol);
/* FIXME: post a message instead */
printf ("decoded %s symbol \"%s\"\n", zbar_get_symbol_name (typ), data); printf ("decoded %s symbol \"%s\"\n", zbar_get_symbol_name (typ), data);
} }
/* clean up */ /* clean up */
zbar_image_destroy (image); zbar_image_destroy (image);
done: done:
return GST_FLOW_OK; return GST_FLOW_OK;
/* ERRORS */ /* ERRORS */
} }
static gboolean
gst_zbar_start (GstBaseTransform * base)
{
GstZBar *zbar = GST_ZBAR (base);
/* start the cache (e.g. for filtering dupes) */
zbar_image_scanner_enable_cache (zbar->scanner, TRUE);
return TRUE;
}
static gboolean
gst_zbar_stop (GstBaseTransform * base)
{
GstZBar *zbar = GST_ZBAR (base);
/* stop the cache (e.g. for filtering dupes) */
zbar_image_scanner_enable_cache (zbar->scanner, FALSE);
return TRUE;
}
static gboolean static gboolean
plugin_init (GstPlugin * plugin) plugin_init (GstPlugin * plugin)
{ {