2 * transition_affine.c -- affine transformations
3 * Copyright (C) 2003-2010 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
5 * Author: Dan Dennedy <dan@dennedy.org>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <framework/mlt_transition.h>
23 #include <framework/mlt.h>
33 /** Calculate real geometry.
36 static void geometry_calculate( mlt_transition this, const char *store, struct mlt_geometry_item_s *output, float position )
38 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
39 mlt_geometry geometry = mlt_properties_get_data( properties, store, NULL );
40 int mirror_off = mlt_properties_get_int( properties, "mirror_off" );
41 int repeat_off = mlt_properties_get_int( properties, "repeat_off" );
42 int length = mlt_geometry_get_length( geometry );
45 if ( !repeat_off && position >= length && length != 0 )
47 int section = position / length;
48 position -= section * length;
49 if ( !mirror_off && section % 2 == 1 )
50 position = length - position;
53 // Fetch the key for the position
54 mlt_geometry_fetch( geometry, output, position );
58 static mlt_geometry transition_parse_keys( mlt_transition this, const char *name, const char *store, int normalised_width, int normalised_height )
60 // Get the properties of the transition
61 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
63 // Try to fetch it first
64 mlt_geometry geometry = mlt_properties_get_data( properties, store, NULL );
66 // Determine length and obtain cycle
67 mlt_position length = mlt_transition_get_length( this );
68 double cycle = mlt_properties_get_double( properties, "cycle" );
70 // Allow a geometry repeat cycle
76 if ( geometry == NULL )
78 // Get the new style geometry string
79 char *property = mlt_properties_get( properties, name );
81 // Create an empty geometries object
82 geometry = mlt_geometry_init( );
84 // Parse the geometry if we have one
85 mlt_geometry_parse( geometry, property, length, normalised_width, normalised_height );
88 mlt_properties_set_data( properties, store, geometry, 0, ( mlt_destructor )mlt_geometry_close, NULL );
92 // Check for updates and refresh if necessary
93 mlt_geometry_refresh( geometry, mlt_properties_get( properties, name ), length, normalised_width, normalised_height );
99 static mlt_geometry composite_calculate( mlt_transition this, struct mlt_geometry_item_s *result, int nw, int nh, float position )
101 // Structures for geometry
102 mlt_geometry start = transition_parse_keys( this, "geometry", "geometries", nw, nh );
104 // Do the calculation
105 geometry_calculate( this, "geometries", result, position );
110 static inline float composite_calculate_key( mlt_transition this, const char *name, const char *store, int norm, float position )
112 // Struct for the result
113 struct mlt_geometry_item_s result;
115 // Structures for geometry
116 transition_parse_keys( this, name, store, norm, 0 );
118 // Do the calculation
119 geometry_calculate( this, store, &result, position );
130 static void affine_init( float this[3][3] )
143 // Multiply two this affine transform with that
144 static void affine_multiply( float this[3][3], float that[3][3] )
150 for ( i = 0; i < 3; i ++ )
151 for ( j = 0; j < 3; j ++ )
152 output[i][j] = this[i][0] * that[j][0] + this[i][1] * that[j][1] + this[i][2] * that[j][2];
154 this[0][0] = output[0][0];
155 this[0][1] = output[0][1];
156 this[0][2] = output[0][2];
157 this[1][0] = output[1][0];
158 this[1][1] = output[1][1];
159 this[1][2] = output[1][2];
160 this[2][0] = output[2][0];
161 this[2][1] = output[2][1];
162 this[2][2] = output[2][2];
165 // Rotate by a given angle
166 static void affine_rotate_x( float this[3][3], float angle )
169 affine[0][0] = cos( angle * M_PI / 180 );
170 affine[0][1] = 0 - sin( angle * M_PI / 180 );
172 affine[1][0] = sin( angle * M_PI / 180 );
173 affine[1][1] = cos( angle * M_PI / 180 );
178 affine_multiply( this, affine );
181 static void affine_rotate_y( float this[3][3], float angle )
184 affine[0][0] = cos( angle * M_PI / 180 );
186 affine[0][2] = 0 - sin( angle * M_PI / 180 );
190 affine[2][0] = sin( angle * M_PI / 180 );
192 affine[2][2] = cos( angle * M_PI / 180 );
193 affine_multiply( this, affine );
196 static void affine_rotate_z( float this[3][3], float angle )
203 affine[1][1] = cos( angle * M_PI / 180 );
204 affine[1][2] = sin( angle * M_PI / 180 );
206 affine[2][1] = - sin( angle * M_PI / 180 );
207 affine[2][2] = cos( angle * M_PI / 180 );
208 affine_multiply( this, affine );
211 static void affine_scale( float this[3][3], float sx, float sy )
223 affine_multiply( this, affine );
226 // Shear by a given value
227 static void affine_shear( float this[3][3], float shear_x, float shear_y, float shear_z )
231 affine[0][1] = tan( shear_x * M_PI / 180 );
233 affine[1][0] = tan( shear_y * M_PI / 180 );
235 affine[1][2] = tan( shear_z * M_PI / 180 );
239 affine_multiply( this, affine );
242 static void affine_offset( float this[3][3], float x, float y )
248 // Obtain the mapped x coordinate of the input
249 static inline double MapX( float this[3][3], float x, float y )
251 return this[0][0] * x + this[0][1] * y + this[0][2];
254 // Obtain the mapped y coordinate of the input
255 static inline double MapY( float this[3][3], float x, float y )
257 return this[1][0] * x + this[1][1] * y + this[1][2];
260 static inline double MapZ( float this[3][3], float x, float y )
262 return this[2][0] * x + this[2][1] * y + this[2][2];
265 #define MAX( x, y ) x > y ? x : y
266 #define MIN( x, y ) x < y ? x : y
268 static void affine_max_output( float this[3][3], float *w, float *h, float dz, float max_width, float max_height )
270 int tlx = MapX( this, -max_width, max_height ) / dz;
271 int tly = MapY( this, -max_width, max_height ) / dz;
272 int trx = MapX( this, max_width, max_height ) / dz;
273 int try = MapY( this, max_width, max_height ) / dz;
274 int blx = MapX( this, -max_width, -max_height ) / dz;
275 int bly = MapY( this, -max_width, -max_height ) / dz;
276 int brx = MapX( this, max_width, -max_height ) / dz;
277 int bry = MapY( this, max_width, -max_height ) / dz;
284 max_x = MAX( tlx, trx );
285 max_x = MAX( max_x, blx );
286 max_x = MAX( max_x, brx );
288 min_x = MIN( tlx, trx );
289 min_x = MIN( min_x, blx );
290 min_x = MIN( min_x, brx );
292 max_y = MAX( tly, try );
293 max_y = MAX( max_y, bly );
294 max_y = MAX( max_y, bry );
296 min_y = MIN( tly, try );
297 min_y = MIN( min_y, bly );
298 min_y = MIN( min_y, bry );
300 *w = ( float )( max_x - min_x + 1 ) / max_width / 2.0;
301 *h = ( float )( max_y - min_y + 1 ) / max_height / 2.0;
304 #define IN_RANGE( v, r ) ( v >= - r / 2 && v < r / 2 )
306 static inline void get_affine( affine_t *affine, mlt_transition this, float position )
308 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
309 int keyed = mlt_properties_get_int( properties, "keyed" );
313 float fix_rotate_x = mlt_properties_get_double( properties, "fix_rotate_x" );
314 float fix_rotate_y = mlt_properties_get_double( properties, "fix_rotate_y" );
315 float fix_rotate_z = mlt_properties_get_double( properties, "fix_rotate_z" );
316 float rotate_x = mlt_properties_get_double( properties, "rotate_x" );
317 float rotate_y = mlt_properties_get_double( properties, "rotate_y" );
318 float rotate_z = mlt_properties_get_double( properties, "rotate_z" );
319 float fix_shear_x = mlt_properties_get_double( properties, "fix_shear_x" );
320 float fix_shear_y = mlt_properties_get_double( properties, "fix_shear_y" );
321 float fix_shear_z = mlt_properties_get_double( properties, "fix_shear_z" );
322 float shear_x = mlt_properties_get_double( properties, "shear_x" );
323 float shear_y = mlt_properties_get_double( properties, "shear_y" );
324 float shear_z = mlt_properties_get_double( properties, "shear_z" );
325 float ox = mlt_properties_get_double( properties, "ox" );
326 float oy = mlt_properties_get_double( properties, "oy" );
328 affine_rotate_x( affine->matrix, fix_rotate_x + rotate_x * position );
329 affine_rotate_y( affine->matrix, fix_rotate_y + rotate_y * position );
330 affine_rotate_z( affine->matrix, fix_rotate_z + rotate_z * position );
331 affine_shear( affine->matrix,
332 fix_shear_x + shear_x * position,
333 fix_shear_y + shear_y * position,
334 fix_shear_z + shear_z * position );
335 affine_offset( affine->matrix, ox, oy );
339 float rotate_x = composite_calculate_key( this, "rotate_x", "rotate_x_info", 360, position );
340 float rotate_y = composite_calculate_key( this, "rotate_y", "rotate_y_info", 360, position );
341 float rotate_z = composite_calculate_key( this, "rotate_z", "rotate_z_info", 360, position );
342 float shear_x = composite_calculate_key( this, "shear_x", "shear_x_info", 360, position );
343 float shear_y = composite_calculate_key( this, "shear_y", "shear_y_info", 360, position );
344 float shear_z = composite_calculate_key( this, "shear_z", "shear_z_info", 360, position );
345 float o_x = composite_calculate_key( this, "ox", "ox_info", 0, position );
346 float o_y = composite_calculate_key( this, "oy", "oy_info", 0, position );
348 affine_rotate_x( affine->matrix, rotate_x );
349 affine_rotate_y( affine->matrix, rotate_y );
350 affine_rotate_z( affine->matrix, rotate_z );
351 affine_shear( affine->matrix, shear_x, shear_y, shear_z );
352 affine_offset( affine->matrix, o_x, o_y );
359 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
361 // Get the b frame from the stack
362 mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
364 // Get the transition object
365 mlt_transition this = mlt_frame_pop_service( a_frame );
367 // Get the properties of the transition
368 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
370 // Get the properties of the a frame
371 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
373 // Get the properties of the b frame
374 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
376 // Image, format, width, height and image for the b frame
377 uint8_t *b_image = NULL;
378 mlt_image_format b_format = mlt_image_rgb24a;
382 // Assign the current position
383 mlt_position position = mlt_transition_get_position( this, a_frame );
385 int mirror = mlt_properties_get_position( properties, "mirror" );
386 int length = mlt_transition_get_length( this );
387 if ( mlt_properties_get_int( properties, "always_active" ) )
389 mlt_properties props = mlt_properties_get_data( b_props, "_producer", NULL );
390 mlt_position in = mlt_properties_get_int( props, "in" );
391 mlt_position out = mlt_properties_get_int( props, "out" );
392 length = out - in + 1;
395 // Obtain the normalised width and height from the a_frame
396 int normalised_width = mlt_properties_get_int( a_props, "normalised_width" );
397 int normalised_height = mlt_properties_get_int( a_props, "normalised_height" );
399 double consumer_ar = mlt_properties_get_double( a_props, "consumer_aspect_ratio" );
401 // Structures for geometry
402 struct mlt_geometry_item_s result;
404 if ( mirror && position > length / 2 )
405 position = abs( position - length );
407 // Fetch the a frame image
408 *format = mlt_image_rgb24a;
409 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
411 // Calculate the region now
412 mlt_service_lock( MLT_TRANSITION_SERVICE( this ) );
413 composite_calculate( this, &result, normalised_width, normalised_height, ( float )position );
414 mlt_service_unlock( MLT_TRANSITION_SERVICE( this ) );
416 // Fetch the b frame image
417 result.w = ( result.w * *width / normalised_width );
418 result.h = ( result.h * *height / normalised_height );
419 result.x = ( result.x * *width / normalised_width );
420 result.y = ( result.y * *height / normalised_height );
422 // Request full resolution of b frame image.
423 b_width = mlt_properties_get_int( b_props, "real_width" );
424 b_height = mlt_properties_get_int( b_props, "real_height" );
425 mlt_properties_set_int( b_props, "rescale_width", b_width );
426 mlt_properties_set_int( b_props, "rescale_height", b_height );
428 // Suppress padding and aspect normalization.
429 char *interps = mlt_properties_get( a_props, "rescale.interp" );
431 interps = strdup( interps );
432 mlt_properties_set( b_props, "rescale.interp", "none" );
434 // This is not a field-aware transform.
435 mlt_properties_set_int( b_props, "consumer_deinterlace", 1 );
437 mlt_frame_get_image( b_frame, &b_image, &b_format, &b_width, &b_height, 0 );
439 // Check that both images are of the correct format and process
440 if ( *format == mlt_image_rgb24a && b_format == mlt_image_rgb24a )
448 // Get values from the transition
449 float scale_x = mlt_properties_get_double( properties, "scale_x" );
450 float scale_y = mlt_properties_get_double( properties, "scale_y" );
451 int scale = mlt_properties_get_int( properties, "scale" );
452 float geom_scale_x = (float) b_width / result.w;
453 float geom_scale_y = (float) b_height / result.h;
454 float cx = result.x + result.w / 2.0;
455 float cy = result.y + result.h / 2.0;
456 float lower_x = - cx;
457 float lower_y = - cy;
458 float x_offset = (float) b_width / 2.0;
459 float y_offset = (float) b_height / 2.0;
461 interpp interp = interpBL_b32;
462 int i, j; // loop counters
464 affine_init( affine.matrix );
466 // Compute the affine transform
467 get_affine( &affine, this, ( float )position );
468 dz = MapZ( affine.matrix, 0, 0 );
469 if ( ( int )abs( dz * 1000 ) < 25 )
476 // Factor scaling into the transformation based on output resolution.
477 if ( mlt_properties_get_int( properties, "distort" ) )
479 scale_x = geom_scale_x * ( scale_x == 0 ? 1 : scale_x );
480 scale_y = geom_scale_y * ( scale_y == 0 ? 1 : scale_y );
484 // Determine scale with respect to aspect ratio.
485 double consumer_dar = consumer_ar * normalised_width / normalised_height;
486 double b_ar = mlt_properties_get_double( b_props, "aspect_ratio" );
487 double b_dar = b_ar * b_width / b_height;
489 if ( b_dar > consumer_dar )
491 scale_x = geom_scale_x * ( scale_x == 0 ? 1 : scale_x );
492 scale_y = geom_scale_x * ( scale_y == 0 ? 1 : scale_y );
496 scale_x = geom_scale_y * ( scale_x == 0 ? 1 : scale_x );
497 scale_y = geom_scale_y * ( scale_y == 0 ? 1 : scale_y );
499 scale_x *= consumer_ar / b_ar;
503 affine_max_output( affine.matrix, &sw, &sh, dz, *width, *height );
504 affine_scale( affine.matrix, sw * MIN( geom_scale_x, geom_scale_y ), sh * MIN( geom_scale_x, geom_scale_y ) );
506 else if ( scale_x != 0 && scale_y != 0 )
508 affine_scale( affine.matrix, scale_x, scale_y );
511 // Set the interpolation function
512 if ( interps == NULL || strcmp( interps, "nearest" ) == 0 || strcmp( interps, "neighbor" ) == 0 )
513 interp = interpNN_b32;
514 else if ( strcmp( interps, "tiles" ) == 0 || strcmp( interps, "fast_bilinear" ) == 0 )
515 interp = interpNN_b32;
516 else if ( strcmp( interps, "bilinear" ) == 0 )
517 interp = interpBL_b32;
518 else if ( strcmp( interps, "bicubic" ) == 0 )
519 interp = interpBC_b32;
521 else if ( strcmp( interps, "hyper" ) == 0 || strcmp( interps, "sinc" ) == 0 || strcmp( interps, "lanczos" ) == 0 )
522 interp = interpBC_b32;
523 else if ( strcmp( interps, "spline" ) == 0 ) // TODO: spline 4x4 or 6x6
524 interp = interpBC_b32;
526 // Do the transform with interpolation
527 for ( i = 0, y = lower_y; i < *height; i++, y++ )
529 for ( j = 0, x = lower_x; j < *width; j++, x++ )
531 dx = MapX( affine.matrix, x, y ) / dz + x_offset;
532 dy = MapY( affine.matrix, x, y ) / dz + y_offset;
533 if ( dx >= 0 && dx < (b_width - 1) && dy >=0 && dy < (b_height - 1) )
534 interp( b_image, b_width, b_height, dx, dy, result.mix/100.0, p );
545 /** Affine transition processing.
548 static mlt_frame transition_process( mlt_transition transition, mlt_frame a_frame, mlt_frame b_frame )
550 // Push the transition on to the frame
551 mlt_frame_push_service( a_frame, transition );
553 // Push the b_frame on to the stack
554 mlt_frame_push_frame( a_frame, b_frame );
556 // Push the transition method
557 mlt_frame_push_get_image( a_frame, transition_get_image );
562 /** Constructor for the filter.
565 mlt_transition transition_affine_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
567 mlt_transition transition = mlt_transition_new( );
568 if ( transition != NULL )
570 mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( transition ), "distort", 0 );
571 mlt_properties_set( MLT_TRANSITION_PROPERTIES( transition ), "geometry", "0,0:100%x100%" );
572 // Inform apps and framework that this is a video only transition
573 mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( transition ), "_transition_type", 1 );
574 transition->process = transition_process;