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camerabin: Change zoom property from int to float

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Updates zoom property for a more natural type and
makes it consistent with the photography API
This commit is contained in:
Thiago Santos 2010-09-20 16:22:30 -03:00
parent c3527e2653
commit 19981f2787
4 changed files with 37 additions and 25 deletions
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48
gst/camerabin/gstcamerabin.c
View file

@ -186,7 +186,7 @@ static guint camerabin_signals[LAST_SIGNAL];
/* default and range values for args */
#define DEFAULT_MODE MODE_IMAGE
#define DEFAULT_ZOOM 100
#define DEFAULT_ZOOM 1.0
#define DEFAULT_WIDTH 640
#define DEFAULT_HEIGHT 480
#define DEFAULT_CAPTURE_WIDTH 800
@ -205,8 +205,8 @@ static guint camerabin_signals[LAST_SIGNAL];
/* Using "bilinear" as default zoom method */
#define CAMERABIN_DEFAULT_ZOOM_METHOD 1
#define MIN_ZOOM 100
#define MAX_ZOOM 1000
#define MIN_ZOOM 1.0
#define MAX_ZOOM 10.0
#define ZOOM_1X MIN_ZOOM
/* FIXME: this is v4l2camsrc specific */
@ -1019,14 +1019,26 @@ gst_camerabin_change_filename (GstCameraBin * camera, const gchar * name)
}
static gboolean
gst_camerabin_set_videosrc_zoom (GstCameraBin * camera, gint zoom)
gst_camerabin_set_videosrc_zoom (GstCameraBin * camera, gfloat zoom)
{
gboolean ret = FALSE;
GParamSpec *spec;
if (g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src_vid_src),
"zoom")) {
g_object_set (G_OBJECT (camera->src_vid_src), "zoom",
(gfloat) zoom / 100, NULL);
spec = g_object_class_find_property (G_OBJECT_GET_CLASS (camera->src_vid_src),
"zoom");
if (spec) {
GValue value = { 0 };
g_value_init (&value, G_TYPE_FLOAT);
g_value_set_float (&value, zoom);
/* puts zoom into the valid range of the src element */
if (g_param_value_validate (spec, &value)) {
GST_DEBUG_OBJECT (camera, "Modified zoom from %f to %f", zoom,
g_value_get_float (&value));
zoom = g_value_get_float (&value);
}
g_object_set (G_OBJECT (camera->src_vid_src), "zoom", zoom, NULL);
ret = TRUE;
}
return ret;
@ -1034,7 +1046,7 @@ gst_camerabin_set_videosrc_zoom (GstCameraBin * camera, gint zoom)
static gboolean
gst_camerabin_set_element_zoom (GstCameraBin * camera, gint zoom)
gst_camerabin_set_element_zoom (GstCameraBin * camera, gfloat zoom)
{
gint w2_crop = 0, h2_crop = 0;
GstPad *pad_zoom_sink = NULL;
@ -1046,7 +1058,7 @@ gst_camerabin_set_element_zoom (GstCameraBin * camera, gint zoom)
if (camera->src_zoom_crop) {
/* Update capsfilters to apply the zoom */
GST_INFO_OBJECT (camera, "zoom: %d, orig size: %dx%d", zoom,
GST_INFO_OBJECT (camera, "zoom: %f, orig size: %dx%d", zoom,
camera->width, camera->height);
if (zoom != ZOOM_1X) {
@ -1088,15 +1100,15 @@ gst_camerabin_set_element_zoom (GstCameraBin * camera, gint zoom)
static void
gst_camerabin_setup_zoom (GstCameraBin * camera)
{
gint zoom;
gfloat zoom;
g_return_if_fail (camera != NULL);
zoom = g_atomic_int_get (&camera->zoom);
zoom = camera->zoom;
g_return_if_fail (zoom);
GST_INFO_OBJECT (camera, "setting zoom %d", zoom);
GST_INFO_OBJECT (camera, "setting zoom %f", zoom);
if (gst_camerabin_set_videosrc_zoom (camera, zoom)) {
gst_camerabin_set_element_zoom (camera, ZOOM_1X);
@ -1294,7 +1306,7 @@ gst_camerabin_get_internal_tags (GstCameraBin * camera)
}
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_CAPTURING_DIGITAL_ZOOM_RATIO, camera->zoom / 100.0, NULL);
GST_TAG_CAPTURING_DIGITAL_ZOOM_RATIO, (gdouble) camera->zoom, NULL);
if (gst_element_implements_interface (GST_ELEMENT (camera),
GST_TYPE_COLOR_BALANCE)) {
@ -2633,8 +2645,8 @@ gst_camerabin_class_init (GstCameraBinClass * klass)
*/
g_object_class_install_property (gobject_class, ARG_ZOOM,
g_param_spec_int ("zoom", "Zoom",
"The zoom. 100 for 1x, 200 for 2x and so on",
g_param_spec_float ("zoom", "Zoom",
"The zoom. 1.0 for 1x, 2.0 for 2x and so on",
MIN_ZOOM, MAX_ZOOM, DEFAULT_ZOOM,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
@ -3172,7 +3184,7 @@ gst_camerabin_set_property (GObject * object, guint prop_id,
g_value_get_boolean (value));
break;
case ARG_ZOOM:
g_atomic_int_set (&camera->zoom, g_value_get_int (value));
camera->zoom = g_value_get_float (value);
/* does not set it if in NULL, the src is not created yet */
if (GST_STATE (camera) != GST_STATE_NULL)
gst_camerabin_setup_zoom (camera);
@ -3419,7 +3431,7 @@ gst_camerabin_get_property (GObject * object, guint prop_id,
gst_camerabin_video_get_mute (GST_CAMERABIN_VIDEO (camera->vidbin)));
break;
case ARG_ZOOM:
g_value_set_int (value, g_atomic_int_get (&camera->zoom));
g_value_set_float (value, camera->zoom);
break;
case ARG_IMAGE_POST:
g_value_set_object (value,

4
gst/camerabin/gstcamerabin.h
View file

@ -97,8 +97,8 @@ struct _GstCameraBin
/* Caps used to create video preview image */
GstCaps *video_preview_caps;
/* The digital zoom (from 100% to 1000%) */
gint zoom;
/* The digital zoom (from 1.0 to 10.0) */
gfloat zoom;
/* concurrency control */
GMutex *capture_mutex;

8
tests/check/elements/camerabin.c
View file

@ -346,7 +346,7 @@ static void
test_camerabin_properties (GstElement * cam)
{
guint flags;
gint zoom;
gfloat zoom;
gboolean mute;
flags = 0x1f;
@ -354,11 +354,11 @@ test_camerabin_properties (GstElement * cam)
g_object_get (G_OBJECT (cam), "flags", &flags, NULL);
fail_if (flags != 0x1f, "setting camerabin flags failed");
zoom = 200;
zoom = 2.0;
g_object_set (G_OBJECT (cam), "zoom", zoom, NULL);
g_object_get (G_OBJECT (cam), "zoom", &zoom, NULL);
fail_if (zoom != 200, "setting camerabin zoom failed");
g_object_set (G_OBJECT (cam), "zoom", 100, NULL);
fail_if (zoom != 2.0, "setting camerabin zoom failed");
g_object_set (G_OBJECT (cam), "zoom", 1.0f, NULL);
mute = TRUE;
g_object_set (G_OBJECT (cam), "mute", mute, NULL);

2
tests/examples/camerabin/gst-camerabin-test.c
View file

@ -580,7 +580,7 @@ run_pipeline (gpointer user_data)
g_object_unref (video_source);
}
g_object_set (camera_bin, "mute", mute, NULL);
g_object_set (camera_bin, "zoom", zoom, NULL);
g_object_set (camera_bin, "zoom", zoom / 100.0f, NULL);
capture_count++;
g_signal_emit_by_name (camera_bin, "capture-start", 0);