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niimaqdx: add property to set attributes at startup (e.g., gain)

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This commit is contained in:
Joshua M. Doe 2013-01-29 14:06:42 -05:00
parent 6c23f87572
commit 918b48f530
2 changed files with 51 additions and 1 deletions
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51
sys/niimaqdx/gstniimaqdx.c
View File

@ -59,11 +59,13 @@ enum
{
PROP_0,
PROP_DEVICE,
PROP_RING_BUFFER_COUNT
PROP_RING_BUFFER_COUNT,
PROP_ATTRIBUTES
};
#define DEFAULT_PROP_DEVICE "cam0"
#define DEFAULT_PROP_RING_BUFFER_COUNT 3
#define DEFAULT_PROP_ATTRIBUTES ""
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
@ -555,6 +557,10 @@ gst_niimaqdxsrc_class_init (GstNiImaqDxSrcClass * klass)
"The number of buffers in the internal IMAQdx ringbuffer", 1,
G_MAXINT, DEFAULT_PROP_RING_BUFFER_COUNT,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_ATTRIBUTES, g_param_spec_string ("attributes",
"Attributes", "Initial attributes to set", DEFAULT_PROP_ATTRIBUTES,
G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE));
/* install GstBaseSrc vmethod implementations */
gstbasesrc_class->get_caps = gst_niimaqdxsrc_get_caps;
@ -591,6 +597,7 @@ gst_niimaqdxsrc_init (GstNiImaqDxSrc * niimaqdxsrc,
/* initialize properties */
niimaqdxsrc->ringbuffer_count = DEFAULT_PROP_RING_BUFFER_COUNT;
niimaqdxsrc->device_name = g_strdup (DEFAULT_PROP_DEVICE);
niimaqdxsrc->attributes = g_strdup (DEFAULT_PROP_ATTRIBUTES);
/* initialize pointers, then call reset to initialize the rest */
niimaqdxsrc->times = NULL;
@ -640,6 +647,11 @@ gst_niimaqdxsrc_set_property (GObject * object, guint prop_id,
case PROP_RING_BUFFER_COUNT:
niimaqdxsrc->ringbuffer_count = g_value_get_int (value);
break;
case PROP_ATTRIBUTES:
if (niimaqdxsrc->attributes)
g_free (niimaqdxsrc->attributes);
niimaqdxsrc->attributes = g_strdup (g_value_get_string (value));
break;
default:
break;
}
@ -658,6 +670,9 @@ gst_niimaqdxsrc_get_property (GObject * object, guint prop_id, GValue * value,
case PROP_RING_BUFFER_COUNT:
g_value_set_int (value, niimaqdxsrc->ringbuffer_count);
break;
case PROP_ATTRIBUTES:
g_value_set_string (value, niimaqdxsrc->attributes);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -1034,6 +1049,38 @@ error:
return NULL;
}
void
gst_niimaqdxsrc_set_dx_attributes (GstNiImaqDxSrc * niimaqdxsrc)
{
gchar **pairs;
int i;
IMAQdxError rval;
pairs = g_strsplit (niimaqdxsrc->attributes, ";", 0);
for (i = 0;; i++) {
gchar **pair;
if (!pairs[i])
break;
pair = g_strsplit (pairs[i], "=", 2);
g_assert (pair[0]);
g_assert (pair[1]);
GST_DEBUG_OBJECT (niimaqdxsrc, "Setting attribute, '%s'='%s'", pair[0],
pair[1]);
IMAQdxSetAttribute (niimaqdxsrc->session, pair[0], IMAQdxValueTypeString,
(const char *) pair[1]);
if (rval != IMAQdxErrorSuccess) {
gst_niimaqdxsrc_report_imaq_error (rval);
}
g_strfreev (pair);
}
g_strfreev (pairs);
}
/**
* gst_niimaqdxsrc_start:
* src: #GstBaseSrc instance
@ -1095,6 +1142,8 @@ gst_niimaqdxsrc_start (GstBaseSrc * src)
goto error;
}
gst_niimaqdxsrc_set_dx_attributes (niimaqdxsrc);
return TRUE;
error:

1
sys/niimaqdx/gstniimaqdx.h
View File

@ -61,6 +61,7 @@ struct _GstNiImaqDxSrc {
/* properties */
gchar *device_name;
gint ringbuffer_count;
gchar *attributes;
/* image info */
int width;