2 * transition_composite.c -- compose one image over another using alpha channel
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Dan Dennedy <dan@dennedy.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #include "transition_composite.h"
22 #include <framework/mlt.h>
30 typedef void ( *composite_line_fn
)( uint8_t *dest
, uint8_t *src
, int width_src
, uint8_t *alpha_b
, uint8_t *alpha_a
, int weight
, uint16_t *luma
, int softness
);
37 struct mlt_geometry_item_s item
;
38 int nw
; // normalised width
39 int nh
; // normalised height
40 int sw
; // scaled width, not including consumer scale based upon w/nw
41 int sh
; // scaled height, not including consumer scale based upon h/nh
42 int halign
; // horizontal alignment: 0=left, 1=center, 2=right
43 int valign
; // vertical alignment: 0=top, 1=middle, 2=bottom
46 /** Parse the alignment properties into the geometry.
49 static int alignment_parse( char* align
)
54 else if ( isdigit( align
[ 0 ] ) )
56 else if ( align
[ 0 ] == 'c' || align
[ 0 ] == 'm' )
58 else if ( align
[ 0 ] == 'r' || align
[ 0 ] == 'b' )
64 /** Calculate real geometry.
67 static void geometry_calculate( mlt_transition
this, struct geometry_s
*output
, double position
)
69 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
70 mlt_geometry geometry
= mlt_properties_get_data( properties
, "geometries", NULL
);
71 int mirror_off
= mlt_properties_get_int( properties
, "mirror_off" );
72 int repeat_off
= mlt_properties_get_int( properties
, "repeat_off" );
73 int length
= mlt_geometry_get_length( geometry
);
76 if ( !repeat_off
&& position
>= length
&& length
!= 0 )
78 int section
= position
/ length
;
79 position
-= section
* length
;
80 if ( !mirror_off
&& section
% 2 == 1 )
81 position
= length
- position
;
84 // Fetch the key for the position
85 mlt_geometry_fetch( geometry
, &output
->item
, position
);
88 static mlt_geometry
transition_parse_keys( mlt_transition
this, int normalised_width
, int normalised_height
)
90 // Loop variable for property interrogation
93 // Get the properties of the transition
94 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
96 // Create an empty geometries object
97 mlt_geometry geometry
= mlt_geometry_init( );
99 // Get the in and out position
100 mlt_position in
= mlt_transition_get_in( this );
101 mlt_position out
= mlt_transition_get_out( this );
102 int length
= out
- in
+ 1;
103 double cycle
= mlt_properties_get_double( properties
, "cycle" );
105 // Get the new style geometry string
106 char *property
= mlt_properties_get( properties
, "geometry" );
108 // Allow a geometry repeat cycle
111 else if ( cycle
> 0 )
114 // Parse the geometry if we have one
115 mlt_geometry_parse( geometry
, property
, length
, normalised_width
, normalised_height
);
117 // Check if we're using the old style geometry
118 if ( property
== NULL
)
120 // DEPRECATED: Multiple keys for geometry information is inefficient and too rigid for
121 // practical use - while deprecated, it has been slightly extended too - keys can now
122 // be specified out of order, and can be blanked or NULL to simulate removal
124 // Structure to use for parsing and inserting
125 struct mlt_geometry_item_s item
;
127 // Parse the start property
129 if ( mlt_geometry_parse_item( geometry
, &item
, mlt_properties_get( properties
, "start" ) ) == 0 )
130 mlt_geometry_insert( geometry
, &item
);
132 // Parse the keys in between
133 for ( i
= 0; i
< mlt_properties_count( properties
); i
++ )
135 // Get the name of the property
136 char *name
= mlt_properties_get_name( properties
, i
);
138 // Check that it's valid
139 if ( !strncmp( name
, "key[", 4 ) )
141 // Get the value of the property
142 char *value
= mlt_properties_get_value( properties
, i
);
144 // Determine the frame number
145 item
.frame
= atoi( name
+ 4 );
147 // Parse and add to the list
148 if ( mlt_geometry_parse_item( geometry
, &item
, value
) == 0 )
149 mlt_geometry_insert( geometry
, &item
);
151 fprintf( stderr
, "Invalid Key - skipping %s = %s\n", name
, value
);
157 if ( mlt_geometry_parse_item( geometry
, &item
, mlt_properties_get( properties
, "end" ) ) == 0 )
158 mlt_geometry_insert( geometry
, &item
);
164 /** Adjust position according to scaled size and alignment properties.
167 static void alignment_calculate( struct geometry_s
*geometry
)
169 geometry
->item
.x
+= ( geometry
->item
.w
- geometry
->sw
) * geometry
->halign
/ 2;
170 geometry
->item
.y
+= ( geometry
->item
.h
- geometry
->sh
) * geometry
->valign
/ 2;
173 /** Calculate the position for this frame.
176 static int position_calculate( mlt_transition
this, mlt_position position
)
178 // Get the in and out position
179 mlt_position in
= mlt_transition_get_in( this );
182 return position
- in
;
185 /** Calculate the field delta for this frame - position between two frames.
188 static inline double delta_calculate( mlt_transition
this, mlt_frame frame
)
190 // Get the in and out position
191 mlt_position in
= mlt_transition_get_in( this );
192 mlt_position out
= mlt_transition_get_out( this );
193 double length
= out
- in
+ 1;
195 // Get the position of the frame
196 char *name
= mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
197 mlt_position position
= mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame
), name
);
200 double x
= ( double )( position
- in
) / length
;
201 double y
= ( double )( position
+ 1 - in
) / length
;
203 return length
* ( y
- x
) / 2.0;
206 static int get_value( mlt_properties properties
, char *preferred
, char *fallback
)
208 int value
= mlt_properties_get_int( properties
, preferred
);
210 value
= mlt_properties_get_int( properties
, fallback
);
214 /** A linear threshold determination function.
217 static inline int32_t linearstep( int32_t edge1
, int32_t edge2
, int32_t a
)
225 return ( ( a
- edge1
) << 16 ) / ( edge2
- edge1
);
228 /** A smoother, non-linear threshold determination function.
231 static inline int32_t smoothstep( int32_t edge1
, int32_t edge2
, uint32_t a
)
239 a
= ( ( a
- edge1
) << 16 ) / ( edge2
- edge1
);
241 return ( ( ( a
* a
) >> 16 ) * ( ( 3 << 16 ) - ( 2 * a
) ) ) >> 16;
244 /** Load the luma map from PGM stream.
247 static void luma_read_pgm( FILE *f
, uint16_t **map
, int *width
, int *height
)
249 uint8_t *data
= NULL
;
261 // get the magic code
262 if ( fgets( line
, 127, f
) == NULL
)
266 while ( sscanf( line
, " #%s", comment
) > 0 )
267 if ( fgets( line
, 127, f
) == NULL
)
270 if ( line
[0] != 'P' || line
[1] != '5' )
273 // skip white space and see if a new line must be fetched
274 for ( i
= 2; i
< 127 && line
[i
] != '\0' && isspace( line
[i
] ); i
++ );
275 if ( ( line
[i
] == '\0' || line
[i
] == '#' ) && fgets( line
, 127, f
) == NULL
)
279 while ( sscanf( line
, " #%s", comment
) > 0 )
280 if ( fgets( line
, 127, f
) == NULL
)
283 // get the dimensions
284 if ( line
[0] == 'P' )
285 i
= sscanf( line
, "P5 %d %d %d", width
, height
, &maxval
);
287 i
= sscanf( line
, "%d %d %d", width
, height
, &maxval
);
289 // get the height value, if not yet
292 if ( fgets( line
, 127, f
) == NULL
)
296 while ( sscanf( line
, " #%s", comment
) > 0 )
297 if ( fgets( line
, 127, f
) == NULL
)
300 i
= sscanf( line
, "%d", height
);
307 // get the maximum gray value, if not yet
310 if ( fgets( line
, 127, f
) == NULL
)
314 while ( sscanf( line
, " #%s", comment
) > 0 )
315 if ( fgets( line
, 127, f
) == NULL
)
318 i
= sscanf( line
, "%d", &maxval
);
323 // determine if this is one or two bytes per pixel
324 bpp
= maxval
> 255 ?
2 : 1;
326 // allocate temporary storage for the raw data
327 data
= mlt_pool_alloc( *width
* *height
* bpp
);
332 if ( fread( data
, *width
* *height
* bpp
, 1, f
) != 1 )
335 // allocate the luma bitmap
336 *map
= p
= (uint16_t*)mlt_pool_alloc( *width
* *height
* sizeof( uint16_t ) );
340 // proces the raw data into the luma bitmap
341 for ( i
= 0; i
< *width
* *height
* bpp
; i
+= bpp
)
344 *p
++ = data
[ i
] << 8;
346 *p
++ = ( data
[ i
] << 8 ) + data
[ i
+ 1 ];
353 mlt_pool_release( data
);
356 /** Generate a luma map from any YUV image.
359 static void luma_read_yuv422( uint8_t *image
, uint16_t **map
, int width
, int height
)
363 // allocate the luma bitmap
364 uint16_t *p
= *map
= ( uint16_t* )mlt_pool_alloc( width
* height
* sizeof( uint16_t ) );
368 // proces the image data into the luma bitmap
369 for ( i
= 0; i
< width
* height
* 2; i
+= 2 )
370 *p
++ = ( image
[ i
] - 16 ) * 299; // 299 = 65535 / 219
374 /** Composite a source line over a destination line
377 static void composite_line_yuv( uint8_t *dest
, uint8_t *src
, int width
, uint8_t *alpha_b
, uint8_t *alpha_a
, int weight
, uint16_t *luma
, int softness
)
383 for ( j
= 0; j
< width
; j
++ )
386 mix
= ( luma
== NULL
) ? weight
: smoothstep( luma
[ j
], luma
[ j
] + softness
, weight
+ softness
);
387 mix
= ( mix
* a
) >> 8;
388 *dest
= ( *src
++ * mix
+ *dest
* ( ( 1 << 16 ) - mix
) ) >> 16;
390 *dest
= ( *src
++ * mix
+ *dest
* ( ( 1 << 16 ) - mix
) ) >> 16;
392 *alpha_a
= mix
| *alpha_a
;
397 static void composite_line_yuv_or( uint8_t *dest
, uint8_t *src
, int width
, uint8_t *alpha_b
, uint8_t *alpha_a
, int weight
, uint16_t *luma
, int softness
)
403 for ( j
= 0; j
< width
; j
++ )
405 a
= *alpha_b
++ | *alpha_a
;
406 mix
= ( luma
== NULL
) ? weight
: smoothstep( luma
[ j
], luma
[ j
] + softness
, weight
+ softness
);
407 mix
= ( mix
* a
) >> 8;
408 *dest
= ( *src
++ * mix
+ *dest
* ( ( 1 << 16 ) - mix
) ) >> 16;
410 *dest
= ( *src
++ * mix
+ *dest
* ( ( 1 << 16 ) - mix
) ) >> 16;
412 *alpha_a
= mix
| *alpha_a
;
417 /** Composite function.
420 static int composite_yuv( uint8_t *p_dest
, int width_dest
, int height_dest
, uint8_t *p_src
, int width_src
, int height_src
, uint8_t *alpha_b
, uint8_t *alpha_a
, struct geometry_s geometry
, int field
, uint16_t *p_luma
, int32_t softness
, composite_line_fn line_fn
)
424 int x_src
= 0, y_src
= 0;
425 int32_t weight
= ( 1 << 16 ) * ( geometry
.item
.mix
/ 100 );
426 int step
= ( field
> -1 ) ?
2 : 1;
428 int stride_src
= width_src
* bpp
;
429 int stride_dest
= width_dest
* bpp
;
431 // Adjust to consumer scale
432 int x
= rint( 0.5 + geometry
.item
.x
* width_dest
/ geometry
.nw
);
433 int y
= rint( 0.5 + geometry
.item
.y
* height_dest
/ geometry
.nh
);
434 int x_uneven
= x
& 1;
436 // optimization points - no work to do
437 if ( width_src
<= 0 || height_src
<= 0 )
440 if ( ( x
< 0 && -x
>= width_src
) || ( y
< 0 && -y
>= height_src
) )
443 // crop overlay off the left edge of frame
451 // crop overlay beyond right edge of frame
452 if ( x
+ width_src
> width_dest
)
453 width_src
= width_dest
- x
;
455 // crop overlay off the top edge of the frame
463 // crop overlay below bottom edge of frame
464 if ( y
+ height_src
> height_dest
)
465 height_src
= height_dest
- y
;
467 // offset pointer into overlay buffer based on cropping
468 p_src
+= x_src
* bpp
+ y_src
* stride_src
;
470 // offset pointer into frame buffer based upon positive coordinates only!
471 p_dest
+= ( x
< 0 ?
0 : x
) * bpp
+ ( y
< 0 ?
0 : y
) * stride_dest
;
473 // offset pointer into alpha channel based upon cropping
474 alpha_b
+= x_src
+ y_src
* stride_src
/ bpp
;
475 alpha_a
+= x
+ y
* stride_dest
/ bpp
;
477 // offset pointer into luma channel based upon cropping
479 p_luma
+= x_src
+ y_src
* stride_src
/ bpp
;
481 // Assuming lower field first
482 // Special care is taken to make sure the b_frame is aligned to the correct field.
483 // field 0 = lower field and y should be odd (y is 0-based).
484 // field 1 = upper field and y should be even.
485 if ( ( field
> -1 ) && ( y
% 2 == field
) )
487 if ( ( field
== 1 && y
< height_dest
- 1 ) || ( field
== 0 && y
== 0 ) )
488 p_dest
+= stride_dest
;
490 p_dest
-= stride_dest
;
493 // On the second field, use the other lines from b_frame
497 alpha_b
+= stride_src
/ bpp
;
498 alpha_a
+= stride_dest
/ bpp
;
504 int alpha_b_stride
= stride_src
/ bpp
;
505 int alpha_a_stride
= stride_dest
/ bpp
;
507 // Make sure than x and w are even
515 // now do the compositing only to cropped extents
516 for ( i
= 0; i
< height_src
; i
+= step
)
518 line_fn( p_dest
, p_src
, width_src
, alpha_b
, alpha_a
, weight
, p_luma
, softness
);
521 p_dest
+= stride_dest
;
522 alpha_b
+= alpha_b_stride
;
523 alpha_a
+= alpha_a_stride
;
525 p_luma
+= alpha_b_stride
;
532 /** Scale 16bit greyscale luma map using nearest neighbor.
536 scale_luma ( uint16_t *dest_buf
, int dest_width
, int dest_height
, const uint16_t *src_buf
, int src_width
, int src_height
, int invert
)
539 register int x_step
= ( src_width
<< 16 ) / dest_width
;
540 register int y_step
= ( src_height
<< 16 ) / dest_height
;
541 register int x
, y
= 0;
543 for ( i
= 0; i
< dest_height
; i
++ )
545 const uint16_t *src
= src_buf
+ ( y
>> 16 ) * src_width
;
548 for ( j
= 0; j
< dest_width
; j
++ )
550 *dest_buf
++ = src
[ x
>> 16 ] ^ invert
;
557 static uint16_t* get_luma( mlt_properties properties
, int width
, int height
)
559 // The cached luma map information
560 int luma_width
= mlt_properties_get_int( properties
, "_luma.width" );
561 int luma_height
= mlt_properties_get_int( properties
, "_luma.height" );
562 uint16_t *luma_bitmap
= mlt_properties_get_data( properties
, "_luma.bitmap", NULL
);
563 int invert
= mlt_properties_get_int( properties
, "luma_invert" );
565 // If the filename property changed, reload the map
566 char *resource
= mlt_properties_get( properties
, "luma" );
570 if ( luma_width
== 0 || luma_height
== 0 )
573 luma_height
= height
;
576 if ( resource
!= NULL
&& strchr( resource
, '%' ) )
578 // TODO: Clean up quick and dirty compressed/existence check
580 sprintf( temp
, "%s/lumas/%s/%s", mlt_factory_prefix( ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource
, '%' ) + 1 );
581 test
= fopen( temp
, "r" );
583 strcat( temp
, ".png" );
589 if ( resource
!= NULL
&& ( luma_bitmap
== NULL
|| luma_width
!= width
|| luma_height
!= height
) )
591 uint16_t *orig_bitmap
= mlt_properties_get_data( properties
, "_luma.orig_bitmap", NULL
);
592 luma_width
= mlt_properties_get_int( properties
, "_luma.orig_width" );
593 luma_height
= mlt_properties_get_int( properties
, "_luma.orig_height" );
595 // Load the original luma once
596 if ( orig_bitmap
== NULL
)
598 char *extension
= strrchr( resource
, '.' );
600 // See if it is a PGM
601 if ( extension
!= NULL
&& strcmp( extension
, ".pgm" ) == 0 )
604 FILE *f
= fopen( resource
, "r" );
608 luma_read_pgm( f
, &orig_bitmap
, &luma_width
, &luma_height
);
611 // Remember the original size for subsequent scaling
612 mlt_properties_set_data( properties
, "_luma.orig_bitmap", orig_bitmap
, luma_width
* luma_height
* 2, mlt_pool_release
, NULL
);
613 mlt_properties_set_int( properties
, "_luma.orig_width", luma_width
);
614 mlt_properties_set_int( properties
, "_luma.orig_height", luma_height
);
619 // Get the factory producer service
620 char *factory
= mlt_properties_get( properties
, "factory" );
622 // Create the producer
623 mlt_producer producer
= mlt_factory_producer( factory
, resource
);
626 if ( producer
!= NULL
)
628 // Get the producer properties
629 mlt_properties producer_properties
= MLT_PRODUCER_PROPERTIES( producer
);
631 // Ensure that we loop
632 mlt_properties_set( producer_properties
, "eof", "loop" );
634 // Now pass all producer. properties on the transition down
635 mlt_properties_pass( producer_properties
, properties
, "luma." );
637 // We will get the alpha frame from the producer
638 mlt_frame luma_frame
= NULL
;
640 // Get the luma frame
641 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer
), &luma_frame
, 0 ) == 0 )
644 mlt_image_format luma_format
= mlt_image_yuv422
;
646 // Get image from the luma producer
647 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame
), "rescale.interp", "none" );
648 mlt_frame_get_image( luma_frame
, &luma_image
, &luma_format
, &luma_width
, &luma_height
, 0 );
650 // Generate the luma map
651 if ( luma_image
!= NULL
&& luma_format
== mlt_image_yuv422
)
652 luma_read_yuv422( luma_image
, &orig_bitmap
, luma_width
, luma_height
);
654 // Remember the original size for subsequent scaling
655 mlt_properties_set_data( properties
, "_luma.orig_bitmap", orig_bitmap
, luma_width
* luma_height
* 2, mlt_pool_release
, NULL
);
656 mlt_properties_set_int( properties
, "_luma.orig_width", luma_width
);
657 mlt_properties_set_int( properties
, "_luma.orig_height", luma_height
);
659 // Cleanup the luma frame
660 mlt_frame_close( luma_frame
);
663 // Cleanup the luma producer
664 mlt_producer_close( producer
);
669 luma_bitmap
= mlt_pool_alloc( width
* height
* sizeof( uint16_t ) );
670 scale_luma( luma_bitmap
, width
, height
, orig_bitmap
, luma_width
, luma_height
, invert
* ( ( 1 << 16 ) - 1 ) );
672 // Remember the scaled luma size to prevent unnecessary scaling
673 mlt_properties_set_int( properties
, "_luma.width", width
);
674 mlt_properties_set_int( properties
, "_luma.height", height
);
675 mlt_properties_set_data( properties
, "_luma.bitmap", luma_bitmap
, width
* height
* 2, mlt_pool_release
, NULL
);
680 /** Get the properly sized image from b_frame.
683 static int get_b_frame_image( mlt_transition
this, mlt_frame b_frame
, uint8_t **image
, int *width
, int *height
, struct geometry_s
*geometry
)
686 mlt_image_format format
= mlt_image_yuv422
;
688 // Get the properties objects
689 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
690 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
692 if ( mlt_properties_get_int( properties
, "distort" ) == 0 && mlt_properties_get_int( b_props
, "distort" ) == 0 && geometry
->item
.distort
== 0 )
694 // Adjust b_frame pixel aspect
695 int normalised_width
= geometry
->item
.w
;
696 int normalised_height
= geometry
->item
.h
;
697 int real_width
= get_value( b_props
, "real_width", "width" );
698 int real_height
= get_value( b_props
, "real_height", "height" );
699 double input_ar
= mlt_frame_get_aspect_ratio( b_frame
);
700 double output_ar
= mlt_properties_get_double( b_props
, "consumer_aspect_ratio" );
701 if ( input_ar
== 0.0 ) input_ar
= output_ar
;
702 int scaled_width
= input_ar
/ output_ar
* real_width
;
703 int scaled_height
= real_height
;
705 // Now ensure that our images fit in the normalised frame
706 if ( scaled_width
> normalised_width
)
708 scaled_height
= scaled_height
* normalised_width
/ scaled_width
;
709 scaled_width
= normalised_width
;
711 if ( scaled_height
> normalised_height
)
713 scaled_width
= scaled_width
* normalised_height
/ scaled_height
;
714 scaled_height
= normalised_height
;
717 // Honour the fill request - this will scale the image to fill width or height while maintaining a/r
718 // ????: Shouln't this be the default behaviour?
719 if ( mlt_properties_get_int( properties
, "fill" ) )
721 if ( scaled_height
< normalised_height
&& scaled_width
* normalised_height
/ scaled_height
< normalised_width
)
723 scaled_width
= scaled_width
* normalised_height
/ scaled_height
;
724 scaled_height
= normalised_height
;
726 else if ( scaled_width
< normalised_width
&& scaled_height
* normalised_width
/ scaled_width
< normalised_height
)
728 scaled_height
= scaled_height
* normalised_width
/ scaled_width
;
729 scaled_width
= normalised_width
;
733 // Save the new scaled dimensions
734 geometry
->sw
= scaled_width
;
735 geometry
->sh
= scaled_height
;
739 geometry
->sw
= geometry
->item
.w
;
740 geometry
->sh
= geometry
->item
.h
;
743 // We want to ensure that we bypass resize now...
744 mlt_properties_set_int( b_props
, "distort", 1 );
746 // Take into consideration alignment for optimisation
747 if ( !mlt_properties_get_int( properties
, "titles" ) )
748 alignment_calculate( geometry
);
750 // Adjust to consumer scale
751 *width
= geometry
->sw
* *width
/ geometry
->nw
;
752 *height
= geometry
->sh
* *height
/ geometry
->nh
;
754 ret
= mlt_frame_get_image( b_frame
, image
, &format
, width
, height
, 1 );
756 return ret
&& image
!= NULL
;
760 static mlt_geometry
composite_calculate( mlt_transition
this, struct geometry_s
*result
, mlt_frame a_frame
, double position
)
762 // Get the properties from the transition
763 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
765 // Get the properties from the frame
766 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
768 // Structures for geometry
769 mlt_geometry start
= mlt_properties_get_data( properties
, "geometries", NULL
);
771 // Obtain the normalised width and height from the a_frame
772 int normalised_width
= mlt_properties_get_int( a_props
, "normalised_width" );
773 int normalised_height
= mlt_properties_get_int( a_props
, "normalised_height" );
775 // Now parse the geometries
778 // Parse the transitions properties
779 start
= transition_parse_keys( this, normalised_width
, normalised_height
);
781 // Assign to properties to ensure we get destroyed
782 mlt_properties_set_data( properties
, "geometries", start
, 0, ( mlt_destructor
)mlt_geometry_close
, NULL
);
786 int length
= mlt_transition_get_out( this ) - mlt_transition_get_in( this ) + 1;
787 double cycle
= mlt_properties_get_double( properties
, "cycle" );
790 else if ( cycle
> 0 )
792 mlt_geometry_refresh( start
, mlt_properties_get( properties
, "geometry" ), length
, normalised_width
, normalised_height
);
795 // Do the calculation
796 geometry_calculate( this, result
, position
);
798 // Assign normalised info
799 result
->nw
= normalised_width
;
800 result
->nh
= normalised_height
;
802 // Now parse the alignment
803 result
->halign
= alignment_parse( mlt_properties_get( properties
, "halign" ) );
804 result
->valign
= alignment_parse( mlt_properties_get( properties
, "valign" ) );
809 static inline void inline_memcpy( uint8_t *dest
, uint8_t *src
, int length
)
811 uint8_t *end
= src
+ length
;
819 mlt_frame
composite_copy_region( mlt_transition
this, mlt_frame a_frame
, mlt_position frame_position
)
821 // Create a frame to return
822 mlt_frame b_frame
= mlt_frame_init( );
824 // Get the properties of the a frame
825 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
827 // Get the properties of the b frame
828 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
831 int position
= position_calculate( this, frame_position
);
834 uint8_t *dest
= NULL
;
836 // Get the image and dimensions
837 uint8_t *image
= mlt_properties_get_data( a_props
, "image", NULL
);
838 int width
= mlt_properties_get_int( a_props
, "width" );
839 int height
= mlt_properties_get_int( a_props
, "height" );
841 // Pointers for copy operation
853 // Will need to know region to copy
854 struct geometry_s result
;
856 double delta
= delta_calculate( this, a_frame
);
858 // Calculate the region now
859 composite_calculate( this, &result
, a_frame
, position
+ delta
/ 2 );
861 // Need to scale down to actual dimensions
862 x
= rint( 0.5 + result
.item
.x
* width
/ result
.nw
);
863 y
= rint( 0.5 + result
.item
.y
* height
/ result
.nh
);
864 w
= rint( 0.5 + result
.item
.w
* width
/ result
.nw
);
865 h
= rint( 0.5 + result
.item
.h
* height
/ result
.nh
);
867 // Make sure that x and w are even
883 // Now we need to create a new destination image
884 dest
= mlt_pool_alloc( w
* h
* 2 );
886 // Assign to the new frame
887 mlt_properties_set_data( b_props
, "image", dest
, w
* h
* 2, mlt_pool_release
, NULL
);
888 mlt_properties_set_int( b_props
, "width", w
);
889 mlt_properties_set_int( b_props
, "height", h
);
898 if ( y
+ h
> height
)
899 h
-= ( y
+ h
- height
);
908 if ( w
> 0 && h
> 0 )
910 // Copy the region of the image
911 p
= image
+ y
* ss
+ x
* 2;
915 inline_memcpy( dest
, p
, w
* 2 );
921 // Assign this position to the b frame
922 mlt_frame_set_position( b_frame
, frame_position
);
923 mlt_properties_set_int( b_props
, "distort", 1 );
932 static int transition_get_image( mlt_frame a_frame
, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
934 // Get the b frame from the stack
935 mlt_frame b_frame
= mlt_frame_pop_frame( a_frame
);
937 // Get the transition from the a frame
938 mlt_transition
this = mlt_frame_pop_service( a_frame
);
941 int out
= mlt_frame_pop_service_int( a_frame
);
942 int in
= mlt_frame_pop_service_int( a_frame
);
944 // Get the properties from the transition
945 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
947 // TODO: clean up always_active behaviour
948 if ( mlt_properties_get_int( properties
, "always_active" ) )
950 mlt_events_block( properties
, properties
);
951 mlt_properties_set_int( properties
, "in", in
);
952 mlt_properties_set_int( properties
, "out", out
);
953 mlt_events_unblock( properties
, properties
);
956 // This compositer is yuv422 only
957 *format
= mlt_image_yuv422
;
959 if ( b_frame
!= NULL
)
961 // Get the properties of the a frame
962 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
964 // Get the properties of the b frame
965 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
967 // Structures for geometry
968 struct geometry_s result
;
970 // Calculate the position
971 double position
= mlt_properties_get_double( b_props
, "relative_position" );
972 double delta
= delta_calculate( this, a_frame
);
974 // Get the image from the b frame
975 uint8_t *image_b
= NULL
;
976 int width_b
= *width
;
977 int height_b
= *height
;
979 // Do the calculation
980 composite_calculate( this, &result
, a_frame
, position
);
982 // Since we are the consumer of the b_frame, we must pass along these
983 // consumer properties from the a_frame
984 mlt_properties_set_double( b_props
, "consumer_deinterlace", mlt_properties_get_double( a_props
, "consumer_deinterlace" ) );
985 mlt_properties_set_double( b_props
, "consumer_aspect_ratio", mlt_properties_get_double( a_props
, "consumer_aspect_ratio" ) );
986 mlt_properties_set_int( b_props
, "normalised_width", mlt_properties_get_double( a_props
, "normalised_width" ) );
987 mlt_properties_set_int( b_props
, "normalised_height", mlt_properties_get_double( a_props
, "normalised_height" ) );
989 // TODO: Dangerous/temporary optimisation - if nothing to do, then do nothing
990 if ( mlt_properties_get_int( properties
, "no_alpha" ) &&
991 result
.item
.x
== 0 && result
.item
.y
== 0 && result
.item
.w
== *width
&& result
.item
.h
== *height
&& result
.item
.mix
== 100 )
993 mlt_frame_get_image( b_frame
, image
, format
, width
, height
, 1 );
994 if ( !mlt_frame_is_test_card( a_frame
) )
995 mlt_frame_replace_image( a_frame
, *image
, *format
, *width
, *height
);
999 // Get the image from the a frame
1000 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, 1 );
1002 // Optimisation - no compositing required
1003 if ( result
.item
.mix
== 0 || ( result
.item
.w
== 0 && result
.item
.h
== 0 ) )
1006 // Need to keep the width/height of the a_frame on the b_frame for titling
1007 if ( mlt_properties_get( a_props
, "dest_width" ) == NULL
)
1009 mlt_properties_set_int( a_props
, "dest_width", *width
);
1010 mlt_properties_set_int( a_props
, "dest_height", *height
);
1011 mlt_properties_set_int( b_props
, "dest_width", *width
);
1012 mlt_properties_set_int( b_props
, "dest_height", *height
);
1016 mlt_properties_set_int( b_props
, "dest_width", mlt_properties_get_int( a_props
, "dest_width" ) );
1017 mlt_properties_set_int( b_props
, "dest_height", mlt_properties_get_int( a_props
, "dest_height" ) );
1020 // Special case for titling...
1021 if ( mlt_properties_get_int( properties
, "titles" ) )
1023 if ( mlt_properties_get( b_props
, "rescale.interp" ) == NULL
)
1024 mlt_properties_set( b_props
, "rescale.interp", "hyper" );
1025 width_b
= mlt_properties_get_int( a_props
, "dest_width" );
1026 height_b
= mlt_properties_get_int( a_props
, "dest_height" );
1029 if ( get_b_frame_image( this, b_frame
, &image_b
, &width_b
, &height_b
, &result
) == 0 )
1031 uint8_t *dest
= *image
;
1032 uint8_t *src
= image_b
;
1033 uint8_t *alpha_b
= mlt_frame_get_alpha_mask( b_frame
);
1034 uint8_t *alpha_a
= mlt_frame_get_alpha_mask( a_frame
);
1036 mlt_properties_get_int( a_props
, "consumer_deinterlace" ) ||
1037 mlt_properties_get_int( properties
, "progressive" );
1040 int32_t luma_softness
= mlt_properties_get_double( properties
, "softness" ) * ( 1 << 16 );
1041 uint16_t *luma_bitmap
= get_luma( properties
, width_b
, height_b
);
1042 composite_line_fn line_fn
= composite_line_yuv
;
1044 if ( mlt_properties_get_int( properties
, "or" ) )
1045 line_fn
= composite_line_yuv_or
;
1047 if ( mlt_properties_get( properties
, "alpha_a" ) )
1048 memset( alpha_a
, mlt_properties_get_int( properties
, "alpha_a" ), *width
* *height
);
1050 if ( mlt_properties_get( properties
, "alpha_b" ) )
1051 memset( alpha_b
, mlt_properties_get_int( properties
, "alpha_b" ), width_b
* height_b
);
1053 for ( field
= 0; field
< ( progressive ?
1 : 2 ); field
++ )
1055 // Assume lower field (0) first
1056 double field_position
= position
+ field
* delta
;
1058 // Do the calculation if we need to
1059 composite_calculate( this, &result
, a_frame
, field_position
);
1061 if ( mlt_properties_get_int( properties
, "titles" ) )
1063 result
.item
.w
= *width
* ( result
.item
.w
/ result
.nw
);
1064 result
.nw
= result
.item
.w
;
1065 result
.item
.h
= *height
* ( result
.item
.h
/ result
.nh
);
1066 result
.nh
= *height
;
1067 result
.sw
= width_b
;
1068 result
.sh
= height_b
;
1072 alignment_calculate( &result
);
1074 // Composite the b_frame on the a_frame
1075 composite_yuv( dest
, *width
, *height
, src
, width_b
, height_b
, alpha_b
, alpha_a
, result
, progressive ?
-1 : field
, luma_bitmap
, luma_softness
, line_fn
);
1081 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, 1 );
1087 /** Composition transition processing.
1090 static mlt_frame
composite_process( mlt_transition
this, mlt_frame a_frame
, mlt_frame b_frame
)
1092 // Get a unique name to store the frame position
1093 char *name
= mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
1095 // UGH - this is a TODO - find a more reliable means of obtaining in/out for the always_active case
1096 if ( mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "always_active" ) == 0 )
1098 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "in" ) );
1099 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "out" ) );
1101 // Assign the current position to the name
1102 mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame
), name
, mlt_frame_get_position( a_frame
) );
1104 // Propogate the transition properties to the b frame
1105 mlt_properties_set_double( MLT_FRAME_PROPERTIES( b_frame
), "relative_position", position_calculate( this, mlt_frame_get_position( a_frame
) ) );
1109 mlt_properties props
= mlt_properties_get_data( MLT_FRAME_PROPERTIES( b_frame
), "_producer", NULL
);
1110 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( props
, "in" ) );
1111 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( props
, "out" ) );
1112 mlt_properties_set_int( MLT_FRAME_PROPERTIES( b_frame
), "relative_position", mlt_properties_get_int( props
, "_frame" ) - mlt_properties_get_int( props
, "in" ) );
1114 // Assign the current position to the name
1115 mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame
), name
, mlt_properties_get_position( MLT_FRAME_PROPERTIES( b_frame
), "relative_position" ) );
1118 mlt_frame_push_service( a_frame
, this );
1119 mlt_frame_push_frame( a_frame
, b_frame
);
1120 mlt_frame_push_get_image( a_frame
, transition_get_image
);
1124 /** Constructor for the filter.
1127 mlt_transition
transition_composite_init( char *arg
)
1129 mlt_transition
this = calloc( sizeof( struct mlt_transition_s
), 1 );
1130 if ( this != NULL
&& mlt_transition_init( this, NULL
) == 0 )
1132 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
1134 this->process
= composite_process
;
1136 // Default starting motion and zoom
1137 mlt_properties_set( properties
, "start", arg
!= NULL ? arg
: "0,0:100%x100%" );
1140 mlt_properties_set( properties
, "factory", "fezzik" );
1142 // Inform apps and framework that this is a video only transition
1143 mlt_properties_set_int( properties
, "_transition_type", 1 );
1146 //mlt_properties_set_int( properties, "_MMX", composite_have_mmx() );