2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
24 #include <gst/base/gstbasetransform.h>
25 #include <gst/video/video.h>
29 #define GST_TYPE_VIDEO_BOX \
30 (gst_video_box_get_type())
31 #define GST_VIDEO_BOX(obj) \
32 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_BOX,GstVideoBox))
33 #define GST_VIDEO_BOX_CLASS(klass) \
34 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_BOX,GstVideoBoxClass))
35 #define GST_IS_VIDEO_BOX(obj) \
36 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_BOX))
37 #define GST_IS_VIDEO_BOX_CLASS(obj) \
38 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_BOX))
40 typedef struct _GstVideoBox GstVideoBox;
41 typedef struct _GstVideoBoxClass GstVideoBoxClass;
53 GstBaseTransform element;
56 gint in_width, in_height;
57 gint out_width, out_height;
59 gint box_left, box_right, box_top, box_bottom;
61 gint border_left, border_right, border_top, border_bottom;
62 gint crop_left, crop_right, crop_top, crop_bottom;
68 GstVideoBoxFill fill_type;
71 struct _GstVideoBoxClass
73 GstBaseTransformClass parent_class;
76 /* elementfactory information */
77 static GstElementDetails gst_video_box_details =
78 GST_ELEMENT_DETAILS ("video box filter",
79 "Filter/Effect/Video",
80 "Resizes a video by adding borders or cropping",
81 "Wim Taymans <wim@fluendo.com>");
84 #define DEFAULT_LEFT 0
85 #define DEFAULT_RIGHT 0
87 #define DEFAULT_BOTTOM 0
88 #define DEFAULT_FILL_TYPE VIDEO_BOX_FILL_BLACK
89 #define DEFAULT_ALPHA 1.0
90 #define DEFAULT_BORDER_ALPHA 1.0
105 static GstStaticPadTemplate gst_video_box_src_template =
106 GST_STATIC_PAD_TEMPLATE ("src",
109 GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ AYUV, I420 }"))
112 static GstStaticPadTemplate gst_video_box_sink_template =
113 GST_STATIC_PAD_TEMPLATE ("sink",
116 GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
120 GST_BOILERPLATE (GstVideoBox, gst_video_box, GstBaseTransform,
121 GST_TYPE_BASE_TRANSFORM);
123 static void gst_video_box_set_property (GObject * object, guint prop_id,
124 const GValue * value, GParamSpec * pspec);
125 static void gst_video_box_get_property (GObject * object, guint prop_id,
126 GValue * value, GParamSpec * pspec);
128 static GstCaps *gst_video_box_transform_caps (GstBaseTransform * trans,
129 GstPad * pad, GstCaps * from);
130 static gboolean gst_video_box_set_caps (GstBaseTransform * trans,
131 GstCaps * in, GstCaps * out);
132 static guint gst_video_box_get_size (GstBaseTransform * trans);
133 static GstFlowReturn gst_video_box_transform (GstBaseTransform * trans,
134 GstBuffer * in, GstBuffer * out);
137 #define GST_TYPE_VIDEO_BOX_FILL (gst_video_box_fill_get_type())
139 gst_video_box_fill_get_type (void)
141 static GType video_box_fill_type = 0;
142 static GEnumValue video_box_fill[] = {
143 {VIDEO_BOX_FILL_BLACK, "0", "Black"},
144 {VIDEO_BOX_FILL_GREEN, "1", "Colorkey green"},
145 {VIDEO_BOX_FILL_BLUE, "2", "Colorkey blue"},
149 if (!video_box_fill_type) {
150 video_box_fill_type =
151 g_enum_register_static ("GstVideoBoxFill", video_box_fill);
153 return video_box_fill_type;
158 gst_video_box_base_init (gpointer g_class)
160 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
162 gst_element_class_set_details (element_class, &gst_video_box_details);
164 gst_element_class_add_pad_template (element_class,
165 gst_static_pad_template_get (&gst_video_box_sink_template));
166 gst_element_class_add_pad_template (element_class,
167 gst_static_pad_template_get (&gst_video_box_src_template));
171 gst_video_box_class_init (GstVideoBoxClass * klass)
173 GObjectClass *gobject_class;
174 GstBaseTransformClass *trans_class;
176 gobject_class = (GObjectClass *) klass;
177 trans_class = (GstBaseTransformClass *) klass;
179 gobject_class->set_property = gst_video_box_set_property;
180 gobject_class->get_property = gst_video_box_get_property;
182 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILL_TYPE,
183 g_param_spec_enum ("fill", "Fill", "How to fill the borders",
184 GST_TYPE_VIDEO_BOX_FILL, DEFAULT_FILL_TYPE,
185 (GParamFlags) G_PARAM_READWRITE));
186 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_LEFT,
187 g_param_spec_int ("left", "Left",
188 "Pixels to box at left (<0 = add a border)", G_MININT, G_MAXINT,
189 DEFAULT_LEFT, G_PARAM_READWRITE));
190 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RIGHT,
191 g_param_spec_int ("right", "Right",
192 "Pixels to box at right (<0 = add a border)", G_MININT, G_MAXINT,
193 DEFAULT_RIGHT, G_PARAM_READWRITE));
194 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TOP,
195 g_param_spec_int ("top", "Top",
196 "Pixels to box at top (<0 = add a border)", G_MININT, G_MAXINT,
197 DEFAULT_TOP, G_PARAM_READWRITE));
198 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BOTTOM,
199 g_param_spec_int ("bottom", "Bottom",
200 "Pixels to box at bottom (<0 = add a border)", G_MININT, G_MAXINT,
201 DEFAULT_BOTTOM, G_PARAM_READWRITE));
202 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_ALPHA,
203 g_param_spec_double ("alpha", "Alpha", "Alpha value picture", 0.0, 1.0,
204 DEFAULT_ALPHA, G_PARAM_READWRITE));
205 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_BORDER_ALPHA,
206 g_param_spec_double ("border_alpha", "Border Alpha",
207 "Alpha value of the border", 0.0, 1.0, DEFAULT_BORDER_ALPHA,
210 trans_class->transform_caps = gst_video_box_transform_caps;
211 trans_class->set_caps = gst_video_box_set_caps;
212 trans_class->get_size = gst_video_box_get_size;
213 trans_class->transform = gst_video_box_transform;
217 gst_video_box_init (GstVideoBox * video_box)
219 video_box->box_right = DEFAULT_RIGHT;
220 video_box->box_left = DEFAULT_LEFT;
221 video_box->box_top = DEFAULT_TOP;
222 video_box->box_bottom = DEFAULT_BOTTOM;
223 video_box->crop_right = 0;
224 video_box->crop_left = 0;
225 video_box->crop_top = 0;
226 video_box->crop_bottom = 0;
227 video_box->fill_type = DEFAULT_FILL_TYPE;
228 video_box->alpha = DEFAULT_ALPHA;
229 video_box->border_alpha = DEFAULT_BORDER_ALPHA;
233 gst_video_box_set_property (GObject * object, guint prop_id,
234 const GValue * value, GParamSpec * pspec)
236 GstVideoBox *video_box = GST_VIDEO_BOX (object);
240 video_box->box_left = g_value_get_int (value);
241 if (video_box->box_left < 0) {
242 video_box->border_left = -video_box->box_left;
243 video_box->crop_left = 0;
245 video_box->border_left = 0;
246 video_box->crop_left = video_box->box_left;
250 video_box->box_right = g_value_get_int (value);
251 if (video_box->box_right < 0) {
252 video_box->border_right = -video_box->box_right;
253 video_box->crop_right = 0;
255 video_box->border_right = 0;
256 video_box->crop_right = video_box->box_right;
260 video_box->box_top = g_value_get_int (value);
261 if (video_box->box_top < 0) {
262 video_box->border_top = -video_box->box_top;
263 video_box->crop_top = 0;
265 video_box->border_top = 0;
266 video_box->crop_top = video_box->box_top;
270 video_box->box_bottom = g_value_get_int (value);
271 if (video_box->box_bottom < 0) {
272 video_box->border_bottom = -video_box->box_bottom;
273 video_box->crop_bottom = 0;
275 video_box->border_bottom = 0;
276 video_box->crop_bottom = video_box->box_bottom;
280 video_box->fill_type = g_value_get_enum (value);
283 video_box->alpha = g_value_get_double (value);
285 case PROP_BORDER_ALPHA:
286 video_box->border_alpha = g_value_get_double (value);
289 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
294 gst_video_box_get_property (GObject * object, guint prop_id, GValue * value,
297 GstVideoBox *video_box = GST_VIDEO_BOX (object);
301 g_value_set_int (value, video_box->box_left);
304 g_value_set_int (value, video_box->box_right);
307 g_value_set_int (value, video_box->box_top);
310 g_value_set_int (value, video_box->box_bottom);
313 g_value_set_enum (value, video_box->fill_type);
316 g_value_set_double (value, video_box->alpha);
318 case PROP_BORDER_ALPHA:
319 g_value_set_double (value, video_box->border_alpha);
322 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
328 gst_video_box_transform_caps (GstBaseTransform * trans, GstPad * pad,
331 GstVideoBox *video_box;
333 GstStructure *structure;
334 gint direction, i, tmp;
336 video_box = GST_VIDEO_BOX (trans);
337 to = gst_caps_copy (from);
338 direction = (pad == trans->sinkpad) ? -1 : 1;
340 /* FIXME, include AYUV */
341 for (i = 0; i < gst_caps_get_size (to); i++) {
342 structure = gst_caps_get_structure (to, i);
343 if (gst_structure_get_int (structure, "width", &tmp))
344 gst_structure_set (structure, "width", G_TYPE_INT,
345 tmp + direction * (video_box->box_left + video_box->box_right), NULL);
346 if (gst_structure_get_int (structure, "height", &tmp))
347 gst_structure_set (structure, "height", G_TYPE_INT,
348 tmp + direction * (video_box->box_top + video_box->box_bottom), NULL);
355 gst_video_box_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out)
357 GstVideoBox *video_box;
358 GstStructure *structure;
362 video_box = GST_VIDEO_BOX (trans);
364 structure = gst_caps_get_structure (in, 0);
365 ret = gst_structure_get_int (structure, "width", &video_box->in_width);
366 ret &= gst_structure_get_int (structure, "height", &video_box->in_height);
368 structure = gst_caps_get_structure (out, 0);
369 ret &= gst_structure_get_int (structure, "width", &video_box->out_width);
370 ret &= gst_structure_get_int (structure, "height", &video_box->out_height);
371 ret &= gst_structure_get_fourcc (structure, "format", &fourcc);
373 video_box->use_alpha = fourcc == GST_STR_FOURCC ("AYUV");
378 #define ROUND_UP_2(x) (((x)+1)&~1)
379 #define ROUND_UP_4(x) (((x)+3)&~3)
380 #define ROUND_UP_8(x) (((x)+7)&~7)
382 /* see gst-plugins/gst/games/gstvideoimage.c, paint_setup_I420() */
383 #define GST_VIDEO_I420_Y_ROWSTRIDE(width) (ROUND_UP_4(width))
384 #define GST_VIDEO_I420_U_ROWSTRIDE(width) (ROUND_UP_8(width)/2)
385 #define GST_VIDEO_I420_V_ROWSTRIDE(width) ((ROUND_UP_8(GST_VIDEO_I420_Y_ROWSTRIDE(width)))/2)
387 #define GST_VIDEO_I420_Y_OFFSET(w,h) (0)
388 #define GST_VIDEO_I420_U_OFFSET(w,h) (GST_VIDEO_I420_Y_OFFSET(w,h)+(GST_VIDEO_I420_Y_ROWSTRIDE(w)*ROUND_UP_2(h)))
389 #define GST_VIDEO_I420_V_OFFSET(w,h) (GST_VIDEO_I420_U_OFFSET(w,h)+(GST_VIDEO_I420_U_ROWSTRIDE(w)*ROUND_UP_2(h)/2))
391 #define GST_VIDEO_I420_SIZE(w,h) (GST_VIDEO_I420_V_OFFSET(w,h)+(GST_VIDEO_I420_V_ROWSTRIDE(w)*ROUND_UP_2(h)/2))
394 gst_video_box_get_size (GstBaseTransform * trans)
397 GstVideoBox *video_box;
399 video_box = GST_VIDEO_BOX (trans);
401 if (video_box->use_alpha) {
402 size = video_box->out_height * video_box->out_height * 4;
404 size = GST_VIDEO_I420_SIZE (video_box->out_width, video_box->out_height);
409 static int yuv_colors_Y[] = { 16, 150, 29 };
410 static int yuv_colors_U[] = { 128, 46, 255 };
411 static int yuv_colors_V[] = { 128, 21, 107 };
414 gst_video_box_copy_plane_i420 (GstVideoBox * video_box, guint8 * src,
415 guint8 * dest, gint br, gint bl, gint bt, gint bb, gint src_crop_width,
416 gint src_crop_height, gint src_stride, gint dest_width, gint dest_stride,
422 for (j = 0; j < bt; j++) {
423 memset (dest, fill_color, dest_width);
427 /* copy and add left and right border */
428 for (j = 0; j < src_crop_height; j++) {
429 memset (dest, fill_color, bl);
430 memcpy (dest + bl, src, src_crop_width);
431 memset (dest + bl + src_crop_width, fill_color, br);
437 for (j = 0; j < bb; j++) {
438 memset (dest, fill_color, dest_width);
444 gst_video_box_i420 (GstVideoBox * video_box, guint8 * src, guint8 * dest)
446 guint8 *srcY, *srcU, *srcV;
447 guint8 *destY, *destU, *destV;
448 gint crop_width, crop_height;
449 gint out_width, out_height;
450 gint src_width, src_height;
451 gint src_stride, dest_stride;
454 br = video_box->border_right;
455 bl = video_box->border_left;
456 bt = video_box->border_top;
457 bb = video_box->border_bottom;
459 out_width = video_box->out_width;
460 out_height = video_box->out_height;
462 src_width = video_box->in_width;
463 src_height = video_box->in_height;
465 crop_width = src_width - (video_box->crop_left + video_box->crop_right);
466 crop_height = src_height - (video_box->crop_top + video_box->crop_bottom);
469 src_stride = GST_VIDEO_I420_Y_ROWSTRIDE (src_width);
470 dest_stride = GST_VIDEO_I420_Y_ROWSTRIDE (out_width);
472 destY = dest + GST_VIDEO_I420_Y_OFFSET (out_width, out_height);
474 srcY = src + GST_VIDEO_I420_Y_OFFSET (src_width, src_height);
475 srcY += src_stride * video_box->crop_top + video_box->crop_left;
477 gst_video_box_copy_plane_i420 (video_box, srcY, destY, br, bl, bt, bb,
478 crop_width, crop_height, src_stride, out_width, dest_stride,
479 yuv_colors_Y[video_box->fill_type]);
482 src_stride = GST_VIDEO_I420_U_ROWSTRIDE (src_width);
483 dest_stride = GST_VIDEO_I420_U_ROWSTRIDE (out_width);
485 destU = dest + GST_VIDEO_I420_U_OFFSET (out_width, out_height);
487 srcU = src + GST_VIDEO_I420_U_OFFSET (src_width, src_height);
488 srcU += src_stride * (video_box->crop_top / 2) + (video_box->crop_left / 2);
490 gst_video_box_copy_plane_i420 (video_box, srcU, destU, br / 2, bl / 2, bt / 2,
491 bb / 2, crop_width / 2, crop_height / 2, src_stride, out_width / 2,
492 dest_stride, yuv_colors_U[video_box->fill_type]);
495 src_stride = GST_VIDEO_I420_V_ROWSTRIDE (src_width);
496 dest_stride = GST_VIDEO_I420_V_ROWSTRIDE (out_width);
498 destV = dest + GST_VIDEO_I420_V_OFFSET (out_width, out_height);
500 srcV = src + GST_VIDEO_I420_V_OFFSET (src_width, src_height);
501 srcV += src_stride * (video_box->crop_top / 2) + (video_box->crop_left / 2);
503 gst_video_box_copy_plane_i420 (video_box, srcV, destV, br / 2, bl / 2, bt / 2,
504 bb / 2, crop_width / 2, crop_height / 2, src_stride, out_width / 2,
505 dest_stride, yuv_colors_V[video_box->fill_type]);
508 /* Note the source image is always I420, we
509 * are converting to AYUV on the fly here */
512 gst_video_box_ayuv (GstVideoBox * video_box, guint8 * src, guint8 * dest)
514 guint8 *srcY, *srcU, *srcV;
515 gint crop_width, crop_width2, crop_height;
516 gint out_width, out_height;
517 gint src_stride, src_stride2;
519 gint colorY, colorU, colorV;
521 guint8 b_alpha = (guint8) (video_box->border_alpha * 255);
522 guint8 i_alpha = (guint8) (video_box->alpha * 255);
523 guint32 *destp = (guint32 *) dest;
526 br = video_box->border_right;
527 bl = video_box->border_left;
528 bt = video_box->border_top;
529 bb = video_box->border_bottom;
531 out_width = video_box->out_width;
532 out_height = video_box->out_height;
534 src_stride = GST_VIDEO_I420_Y_ROWSTRIDE (video_box->in_width);
535 src_stride2 = src_stride / 2;
538 video_box->in_width - (video_box->crop_left + video_box->crop_right);
539 crop_width2 = crop_width / 2;
541 video_box->in_height - (video_box->crop_top + video_box->crop_bottom);
544 src + GST_VIDEO_I420_Y_OFFSET (video_box->in_width, video_box->in_height);
545 srcY += src_stride * video_box->crop_top + video_box->crop_left;
547 src + GST_VIDEO_I420_U_OFFSET (video_box->in_width, video_box->in_height);
548 srcU += src_stride2 * (video_box->crop_top / 2) + (video_box->crop_left / 2);
550 src + GST_VIDEO_I420_V_OFFSET (video_box->in_width, video_box->in_height);
551 srcV += src_stride2 * (video_box->crop_top / 2) + (video_box->crop_left / 2);
553 colorY = yuv_colors_Y[video_box->fill_type];
554 colorU = yuv_colors_U[video_box->fill_type];
555 colorV = yuv_colors_V[video_box->fill_type];
558 GUINT32_FROM_BE ((b_alpha << 24) | (colorY << 16) | (colorU << 8) |
562 for (i = 0; i < bt; i++) {
563 for (j = 0; j < out_width; j++) {
567 for (i = 0; i < crop_height; i++) {
569 for (j = 0; j < bl; j++) {
572 dest = (guint8 *) destp;
574 for (j = 0; j < crop_width2; j++) {
588 srcU += src_stride2 - crop_width2;
589 srcV += src_stride2 - crop_width2;
591 srcY += src_stride - crop_width;
593 destp = (guint32 *) dest;
595 for (j = 0; j < br; j++) {
600 for (i = 0; i < bb; i++) {
601 for (j = 0; j < out_width; j++) {
608 gst_video_box_transform (GstBaseTransform * trans, GstBuffer * in,
611 GstVideoBox *video_box;
613 video_box = GST_VIDEO_BOX (trans);
615 if (video_box->use_alpha) {
616 gst_video_box_ayuv (video_box, GST_BUFFER_DATA (in), GST_BUFFER_DATA (out));
618 gst_video_box_i420 (video_box, GST_BUFFER_DATA (in), GST_BUFFER_DATA (out));
625 plugin_init (GstPlugin * plugin)
627 return gst_element_register (plugin, "videobox", GST_RANK_NONE,
631 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
634 "resizes a video by adding borders or cropping",
635 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)