yair/gst-plugin-linescan
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

niimaq: add is-signed property

Browse Source
This commit is contained in:
Joshua M. Doe 2013-08-27 10:22:05 -04:00
parent b18610763c
commit cedae288d2
2 changed files with 33 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
sys/niimaq/gstniimaq.c
View File

@ -56,12 +56,14 @@ enum
PROP_0,
PROP_DEVICE,
PROP_RING_BUFFER_COUNT,
PROP_AVOID_COPY
PROP_AVOID_COPY,
PROP_IS_SIGNED
};
#define DEFAULT_PROP_DEVICE "img0"
#define DEFAULT_PROP_RING_BUFFER_COUNT 2
#define DEFAULT_PROP_AVOID_COPY FALSE
#define DEFAULT_PROP_IS_SIGNED FALSE
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
@ -281,6 +283,10 @@ gst_niimaqsrc_class_init (GstNiImaqSrcClass * klass)
g_param_spec_boolean ("avoid-copy", "Avoid copying",
"Whether to avoid copying (do not use with queues)",
DEFAULT_PROP_AVOID_COPY, G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_IS_SIGNED,
g_param_spec_boolean ("is-signed", "Image is signed 16-bit",
"Image is signed 16-bit, shift to unsigned 16-bit",
DEFAULT_PROP_IS_SIGNED, G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&src_factory));
@ -318,6 +324,7 @@ gst_niimaqsrc_init (GstNiImaqSrc * src)
src->bufsize = DEFAULT_PROP_RING_BUFFER_COUNT;
src->interface_name = g_strdup (DEFAULT_PROP_DEVICE);
src->avoid_copy = DEFAULT_PROP_AVOID_COPY;
src->is_signed = DEFAULT_PROP_IS_SIGNED;
}
/**
@ -365,6 +372,9 @@ gst_niimaqsrc_set_property (GObject * object, guint prop_id,
case PROP_AVOID_COPY:
src->avoid_copy = g_value_get_boolean (value);
break;
case PROP_IS_SIGNED:
src->is_signed = g_value_get_boolean (value);
break;
default:
break;
}
@ -386,6 +396,9 @@ gst_niimaqsrc_get_property (GObject * object, guint prop_id, GValue * value,
case PROP_AVOID_COPY:
g_value_set_boolean (value, src->avoid_copy);
break;
case PROP_IS_SIGNED:
g_value_set_boolean (value, src->is_signed);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -595,6 +608,24 @@ gst_niimaqsrc_create (GstPushSrc * psrc, GstBuffer ** buffer)
gst_buffer_unmap (*buffer, &minfo);
}
/* TODO: do this above to reduce copying overhead */
if (src->is_signed) {
gint16 *src;
guint16 *dst;
guint i;
gst_buffer_map (*buffer, &minfo, GST_MAP_READWRITE);
src = minfo.data;
dst = minfo.data;
GST_DEBUG_OBJECT (src, "Shifting signed to unsigned");
/* TODO: make this faster */
for (i = 0; i < minfo.size / 2; i++)
*dst++ = *src++ + 32768;
gst_buffer_unmap (*buffer, &minfo);
}
if (rval) {
gst_niimaqsrc_report_imaq_error (rval);
GST_ELEMENT_ERROR (src, RESOURCE, FAILED,

1
sys/niimaq/gstniimaq.h
View File

@ -53,6 +53,7 @@ struct _GstNiImaqSrc {
gchar *interface_name;
gint bufsize;
gboolean avoid_copy;
gboolean is_signed;
/* image info */
GstVideoFormat format;