diff options
Diffstat (limited to 'gst/videobox/gstvideobox.c')
-rw-r--r-- | gst/videobox/gstvideobox.c | 103 |
1 files changed, 27 insertions, 76 deletions
diff --git a/gst/videobox/gstvideobox.c b/gst/videobox/gstvideobox.c index c10266d3..a50594f9 100644 --- a/gst/videobox/gstvideobox.c +++ b/gst/videobox/gstvideobox.c @@ -34,14 +34,30 @@ * * The videobox plugin has many uses such as doing a mosaic of pictures, * letterboxing video, cutting out pieces of video, picture in picture, etc.. + * + * Setting autocrop to true changes the behavior of the plugin so that + * caps determine crop properties rather than the other way around: given + * input and output dimensions, the crop values are selected so that the + * smaller frame is effectively centered in the larger frame. This + * involves either cropping or padding. + * + * If you use autocrop there is little point in setting the other + * properties manually because they will be overriden if the caps change, + * but nothing stops you from doing so. + * + * Sample pipeline: + * |[ + * gst-launch videotestsrc ! videobox autocrop=true ! \ + * "video/x-raw-yuv, width=600, height=400" ! ffmpegcolorspace ! ximagesink + * ]| */ #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include <gst/gst.h> -#include <gst/base/gstbasetransform.h> -#include <gst/video/video.h> + +#include "gstvideobox.h" + #include <math.h> #include <liboil/liboil.h> #include <string.h> @@ -49,59 +65,6 @@ GST_DEBUG_CATEGORY_STATIC (videobox_debug); #define GST_CAT_DEFAULT videobox_debug -#define GST_TYPE_VIDEO_BOX \ - (gst_video_box_get_type()) -#define GST_VIDEO_BOX(obj) \ - (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_BOX,GstVideoBox)) -#define GST_VIDEO_BOX_CLASS(klass) \ - (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_BOX,GstVideoBoxClass)) -#define GST_IS_VIDEO_BOX(obj) \ - (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_BOX)) -#define GST_IS_VIDEO_BOX_CLASS(klass) \ - (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_BOX)) - -typedef struct _GstVideoBox GstVideoBox; -typedef struct _GstVideoBoxClass GstVideoBoxClass; - -typedef enum -{ - VIDEO_BOX_FILL_BLACK, - VIDEO_BOX_FILL_GREEN, - VIDEO_BOX_FILL_BLUE, - VIDEO_BOX_FILL_LAST -} -GstVideoBoxFill; - -struct _GstVideoBox -{ - GstBaseTransform element; - - /* Guarding everything below */ - GMutex *mutex; - /* caps */ - guint32 in_fourcc; - gint in_width, in_height; - guint32 out_fourcc; - gint out_width, out_height; - - gint box_left, box_right, box_top, box_bottom; - - gint border_left, border_right, border_top, border_bottom; - gint crop_left, crop_right, crop_top, crop_bottom; - - gdouble alpha; - gdouble border_alpha; - - GstVideoBoxFill fill_type; - - gboolean autocrop; -}; - -struct _GstVideoBoxClass -{ - GstBaseTransformClass parent_class; -}; - /* elementfactory information */ static const GstElementDetails gst_video_box_details = GST_ELEMENT_DETAILS ("Video box filter", @@ -132,25 +95,6 @@ enum /* FILL ME */ }; -/* - -Setting autocrop to true changes the behavior of the plugin so that -caps determine crop properties rather than the other way around: given -input and output dimensions, the crop values are selected so that the -smaller frame is effectively centered in the larger frame. This -involves either cropping or padding. - -If you use autocrop there is little point in setting the other -properties manually because they will be overriden if the caps change, -but nothing stops you from doing so. - -Sample pipeline: -gst-launch videotestsrc ! videobox autocrop=true ! \ -"video/x-raw-yuv, width=600, height=400" ! ffmpegcolorspace ! ximagesink - -*/ - - static GstStaticPadTemplate gst_video_box_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, @@ -167,7 +111,6 @@ static GstStaticPadTemplate gst_video_box_sink_template = GST_VIDEO_CAPS_YUV ("I420")) ); - GST_BOILERPLATE (GstVideoBox, gst_video_box, GstBaseTransform, GST_TYPE_BASE_TRANSFORM); @@ -273,6 +216,14 @@ gst_video_box_class_init (GstVideoBoxClass * klass) g_param_spec_double ("border_alpha", "Border Alpha", "Alpha value of the border", 0.0, 1.0, DEFAULT_BORDER_ALPHA, G_PARAM_READWRITE)); + /** + * GstVideoBox:autocrop + * + * If set to %TRUE videobox will automatically crop/pad the input + * video to be centered in the output. + * + * Since: 0.10.16 + **/ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_AUTOCROP, g_param_spec_boolean ("autocrop", "Auto crop", "Auto crop", FALSE, G_PARAM_READWRITE)); |