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 library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, 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
48 /** Parse the alignment properties into the geometry.
51 static int alignment_parse( char* align
)
56 else if ( isdigit( align
[ 0 ] ) )
58 else if ( align
[ 0 ] == 'c' || align
[ 0 ] == 'm' )
60 else if ( align
[ 0 ] == 'r' || align
[ 0 ] == 'b' )
66 /** Calculate real geometry.
69 static void geometry_calculate( mlt_transition
this, struct geometry_s
*output
, double position
)
71 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
72 mlt_geometry geometry
= mlt_properties_get_data( properties
, "geometries", NULL
);
73 int mirror_off
= mlt_properties_get_int( properties
, "mirror_off" );
74 int repeat_off
= mlt_properties_get_int( properties
, "repeat_off" );
75 int length
= mlt_geometry_get_length( geometry
);
78 if ( !repeat_off
&& position
>= length
&& length
!= 0 )
80 int section
= position
/ length
;
81 position
-= section
* length
;
82 if ( !mirror_off
&& section
% 2 == 1 )
83 position
= length
- position
;
86 // Fetch the key for the position
87 mlt_geometry_fetch( geometry
, &output
->item
, position
);
90 static mlt_geometry
transition_parse_keys( mlt_transition
this, int normalised_width
, int normalised_height
)
92 // Loop variable for property interrogation
95 // Get the properties of the transition
96 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
98 // Create an empty geometries object
99 mlt_geometry geometry
= mlt_geometry_init( );
101 // Get the in and out position
102 mlt_position in
= mlt_transition_get_in( this );
103 mlt_position out
= mlt_transition_get_out( this );
104 int length
= out
- in
+ 1;
105 double cycle
= mlt_properties_get_double( properties
, "cycle" );
107 // Get the new style geometry string
108 char *property
= mlt_properties_get( properties
, "geometry" );
110 // Allow a geometry repeat cycle
113 else if ( cycle
> 0 )
116 // Parse the geometry if we have one
117 mlt_geometry_parse( geometry
, property
, length
, normalised_width
, normalised_height
);
119 // Check if we're using the old style geometry
120 if ( property
== NULL
)
122 // DEPRECATED: Multiple keys for geometry information is inefficient and too rigid for
123 // practical use - while deprecated, it has been slightly extended too - keys can now
124 // be specified out of order, and can be blanked or NULL to simulate removal
126 // Structure to use for parsing and inserting
127 struct mlt_geometry_item_s item
;
129 // Parse the start property
131 if ( mlt_geometry_parse_item( geometry
, &item
, mlt_properties_get( properties
, "start" ) ) == 0 )
132 mlt_geometry_insert( geometry
, &item
);
134 // Parse the keys in between
135 for ( i
= 0; i
< mlt_properties_count( properties
); i
++ )
137 // Get the name of the property
138 char *name
= mlt_properties_get_name( properties
, i
);
140 // Check that it's valid
141 if ( !strncmp( name
, "key[", 4 ) )
143 // Get the value of the property
144 char *value
= mlt_properties_get_value( properties
, i
);
146 // Determine the frame number
147 item
.frame
= atoi( name
+ 4 );
149 // Parse and add to the list
150 if ( mlt_geometry_parse_item( geometry
, &item
, value
) == 0 )
151 mlt_geometry_insert( geometry
, &item
);
153 fprintf( stderr
, "Invalid Key - skipping %s = %s\n", name
, value
);
159 if ( mlt_geometry_parse_item( geometry
, &item
, mlt_properties_get( properties
, "end" ) ) == 0 )
160 mlt_geometry_insert( geometry
, &item
);
166 /** Adjust position according to scaled size and alignment properties.
169 static void alignment_calculate( struct geometry_s
*geometry
)
171 geometry
->item
.x
+= ( geometry
->item
.w
- geometry
->sw
) * geometry
->halign
/ 2;
172 geometry
->item
.y
+= ( geometry
->item
.h
- geometry
->sh
) * geometry
->valign
/ 2;
175 /** Calculate the position for this frame.
178 static int position_calculate( mlt_transition
this, mlt_position position
)
180 // Get the in and out position
181 mlt_position in
= mlt_transition_get_in( this );
184 return position
- in
;
187 /** Calculate the field delta for this frame - position between two frames.
190 static inline double delta_calculate( mlt_transition
this, mlt_frame frame
, mlt_position position
)
192 // Get the in and out position
193 mlt_position in
= mlt_transition_get_in( this );
194 mlt_position out
= mlt_transition_get_out( this );
195 double length
= out
- in
+ 1;
198 double x
= ( double )( position
- in
) / length
;
199 double y
= ( double )( position
+ 1 - in
) / length
;
201 return length
* ( y
- x
) / 2.0;
204 static int get_value( mlt_properties properties
, char *preferred
, char *fallback
)
206 int value
= mlt_properties_get_int( properties
, preferred
);
208 value
= mlt_properties_get_int( properties
, fallback
);
212 /** A linear threshold determination function.
215 static inline int32_t linearstep( int32_t edge1
, int32_t edge2
, int32_t a
)
223 return ( ( a
- edge1
) << 16 ) / ( edge2
- edge1
);
226 /** A smoother, non-linear threshold determination function.
229 static inline int32_t smoothstep( int32_t edge1
, int32_t edge2
, uint32_t a
)
237 a
= ( ( a
- edge1
) << 16 ) / ( edge2
- edge1
);
239 return ( ( ( a
* a
) >> 16 ) * ( ( 3 << 16 ) - ( 2 * a
) ) ) >> 16;
242 /** Load the luma map from PGM stream.
245 static void luma_read_pgm( FILE *f
, uint16_t **map
, int *width
, int *height
)
247 uint8_t *data
= NULL
;
259 // get the magic code
260 if ( fgets( line
, 127, f
) == NULL
)
264 while ( sscanf( line
, " #%s", comment
) > 0 )
265 if ( fgets( line
, 127, f
) == NULL
)
268 if ( line
[0] != 'P' || line
[1] != '5' )
271 // skip white space and see if a new line must be fetched
272 for ( i
= 2; i
< 127 && line
[i
] != '\0' && isspace( line
[i
] ); i
++ );
273 if ( ( line
[i
] == '\0' || line
[i
] == '#' ) && fgets( line
, 127, f
) == NULL
)
277 while ( sscanf( line
, " #%s", comment
) > 0 )
278 if ( fgets( line
, 127, f
) == NULL
)
281 // get the dimensions
282 if ( line
[0] == 'P' )
283 i
= sscanf( line
, "P5 %d %d %d", width
, height
, &maxval
);
285 i
= sscanf( line
, "%d %d %d", width
, height
, &maxval
);
287 // get the height value, if not yet
290 if ( fgets( line
, 127, f
) == NULL
)
294 while ( sscanf( line
, " #%s", comment
) > 0 )
295 if ( fgets( line
, 127, f
) == NULL
)
298 i
= sscanf( line
, "%d", height
);
305 // get the maximum gray value, if not yet
308 if ( fgets( line
, 127, f
) == NULL
)
312 while ( sscanf( line
, " #%s", comment
) > 0 )
313 if ( fgets( line
, 127, f
) == NULL
)
316 i
= sscanf( line
, "%d", &maxval
);
321 // determine if this is one or two bytes per pixel
322 bpp
= maxval
> 255 ?
2 : 1;
324 // allocate temporary storage for the raw data
325 data
= mlt_pool_alloc( *width
* *height
* bpp
);
330 if ( fread( data
, *width
* *height
* bpp
, 1, f
) != 1 )
333 // allocate the luma bitmap
334 *map
= p
= (uint16_t*)mlt_pool_alloc( *width
* *height
* sizeof( uint16_t ) );
338 // proces the raw data into the luma bitmap
339 for ( i
= 0; i
< *width
* *height
* bpp
; i
+= bpp
)
342 *p
++ = data
[ i
] << 8;
344 *p
++ = ( data
[ i
] << 8 ) + data
[ i
+ 1 ];
351 mlt_pool_release( data
);
354 /** Generate a luma map from any YUV image.
357 static void luma_read_yuv422( uint8_t *image
, uint16_t **map
, int width
, int height
)
361 // allocate the luma bitmap
362 uint16_t *p
= *map
= ( uint16_t* )mlt_pool_alloc( width
* height
* sizeof( uint16_t ) );
366 // proces the image data into the luma bitmap
367 for ( i
= 0; i
< width
* height
* 2; i
+= 2 )
368 *p
++ = ( image
[ i
] - 16 ) * 299; // 299 = 65535 / 219
371 static inline int calculate_mix( uint16_t *luma
, int j
, int soft
, int weight
, int alpha
)
373 return ( ( ( luma
== NULL
) ? weight
: smoothstep( luma
[ j
], luma
[ j
] + soft
, weight
+ soft
) ) * alpha
) >> 8;
376 static inline uint8_t sample_mix( uint8_t dest
, uint8_t src
, int mix
)
378 return ( src
* mix
+ dest
* ( ( 1 << 16 ) - mix
) ) >> 16;
381 /** Composite a source line over a destination line
384 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 soft
)
389 for ( j
= 0; j
< width
; j
++ )
391 mix
= calculate_mix( luma
, j
, soft
, weight
, *alpha_b
++ );
392 *dest
= sample_mix( *dest
, *src
++, mix
);
394 *dest
= sample_mix( *dest
, *src
++, mix
);
396 *alpha_a
= ( mix
>> 8 ) | *alpha_a
;
401 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 soft
)
406 for ( j
= 0; j
< width
; j
++ )
408 mix
= calculate_mix( luma
, j
, soft
, weight
, *alpha_b
++ | *alpha_a
);
409 *dest
= sample_mix( *dest
, *src
++, mix
);
411 *dest
= sample_mix( *dest
, *src
++, mix
);
413 *alpha_a
++ = mix
>> 8;
417 static void composite_line_yuv_and( uint8_t *dest
, uint8_t *src
, int width
, uint8_t *alpha_b
, uint8_t *alpha_a
, int weight
, uint16_t *luma
, int soft
)
422 for ( j
= 0; j
< width
; j
++ )
424 mix
= calculate_mix( luma
, j
, soft
, weight
, *alpha_b
++ & *alpha_a
);
425 *dest
= sample_mix( *dest
, *src
++, mix
);
427 *dest
= sample_mix( *dest
, *src
++, mix
);
429 *alpha_a
++ = mix
>> 8;
433 static void composite_line_yuv_xor( uint8_t *dest
, uint8_t *src
, int width
, uint8_t *alpha_b
, uint8_t *alpha_a
, int weight
, uint16_t *luma
, int soft
)
438 for ( j
= 0; j
< width
; j
++ )
440 mix
= calculate_mix( luma
, j
, soft
, weight
, *alpha_b
++ ^
*alpha_a
);
441 *dest
= sample_mix( *dest
, *src
++, mix
);
443 *dest
= sample_mix( *dest
, *src
++, mix
);
445 *alpha_a
++ = mix
>> 8;
449 /** Composite function.
452 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
)
456 int x_src
= -geometry
.x_src
, y_src
= -geometry
.y_src
;
457 int uneven_x_src
= ( x_src
% 2 );
458 int32_t weight
= ( ( 1 << 16 ) - 1 ) * ( geometry
.item
.mix
/ 100 );
459 int step
= ( field
> -1 ) ?
2 : 1;
461 int stride_src
= geometry
.sw
* bpp
;
462 int stride_dest
= width_dest
* bpp
;
464 // Adjust to consumer scale
465 int x
= rint( geometry
.item
.x
* width_dest
/ geometry
.nw
);
466 int y
= rint( geometry
.item
.y
* height_dest
/ geometry
.nh
);
467 int uneven_x
= ( x
% 2 );
469 // optimization points - no work to do
470 if ( width_src
<= 0 || height_src
<= 0 || y_src
>= height_src
|| x_src
>= width_src
)
473 if ( ( x
< 0 && -x
>= width_src
) || ( y
< 0 && -y
>= height_src
) )
476 // cropping affects the source width
480 // and it implies cropping
481 if ( width_src
> geometry
.item
.w
)
482 width_src
= geometry
.item
.w
;
485 // cropping affects the source height
489 // and it implies cropping
490 if ( height_src
> geometry
.item
.h
)
491 height_src
= geometry
.item
.h
;
494 // crop overlay off the left edge of frame
502 // crop overlay beyond right edge of frame
503 if ( x
+ width_src
> width_dest
)
504 width_src
= width_dest
- x
;
506 // crop overlay off the top edge of the frame
514 // crop overlay below bottom edge of frame
515 if ( y
+ height_src
> height_dest
)
516 height_src
= height_dest
- y
;
518 // offset pointer into overlay buffer based on cropping
519 p_src
+= x_src
* bpp
+ y_src
* stride_src
;
521 // offset pointer into frame buffer based upon positive coordinates only!
522 p_dest
+= ( x
< 0 ?
0 : x
) * bpp
+ ( y
< 0 ?
0 : y
) * stride_dest
;
524 // offset pointer into alpha channel based upon cropping
525 alpha_b
+= x_src
+ y_src
* stride_src
/ bpp
;
526 alpha_a
+= x
+ y
* stride_dest
/ bpp
;
528 // offset pointer into luma channel based upon cropping
530 p_luma
+= x_src
+ y_src
* stride_src
/ bpp
;
532 // Assuming lower field first
533 // Special care is taken to make sure the b_frame is aligned to the correct field.
534 // field 0 = lower field and y should be odd (y is 0-based).
535 // field 1 = upper field and y should be even.
536 if ( ( field
> -1 ) && ( y
% 2 == field
) )
538 if ( ( field
== 1 && y
< height_dest
- 1 ) || ( field
== 0 && y
== 0 ) )
539 p_dest
+= stride_dest
;
541 p_dest
-= stride_dest
;
544 // On the second field, use the other lines from b_frame
548 alpha_b
+= stride_src
/ bpp
;
549 alpha_a
+= stride_dest
/ bpp
;
555 int alpha_b_stride
= stride_src
/ bpp
;
556 int alpha_a_stride
= stride_dest
/ bpp
;
558 // Align chroma of source and destination
559 if ( uneven_x
!= uneven_x_src
)
566 // now do the compositing only to cropped extents
567 for ( i
= 0; i
< height_src
; i
+= step
)
569 line_fn( p_dest
, p_src
, width_src
, alpha_b
, alpha_a
, weight
, p_luma
, softness
);
572 p_dest
+= stride_dest
;
573 alpha_b
+= alpha_b_stride
;
574 alpha_a
+= alpha_a_stride
;
576 p_luma
+= alpha_b_stride
;
583 /** Scale 16bit greyscale luma map using nearest neighbor.
587 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
)
590 register int x_step
= ( src_width
<< 16 ) / dest_width
;
591 register int y_step
= ( src_height
<< 16 ) / dest_height
;
592 register int x
, y
= 0;
594 for ( i
= 0; i
< dest_height
; i
++ )
596 const uint16_t *src
= src_buf
+ ( y
>> 16 ) * src_width
;
599 for ( j
= 0; j
< dest_width
; j
++ )
601 *dest_buf
++ = src
[ x
>> 16 ] ^ invert
;
608 static uint16_t* get_luma( mlt_transition
this, mlt_properties properties
, int width
, int height
)
610 // The cached luma map information
611 int luma_width
= mlt_properties_get_int( properties
, "_luma.width" );
612 int luma_height
= mlt_properties_get_int( properties
, "_luma.height" );
613 uint16_t *luma_bitmap
= mlt_properties_get_data( properties
, "_luma.bitmap", NULL
);
614 int invert
= mlt_properties_get_int( properties
, "luma_invert" );
616 // If the filename property changed, reload the map
617 char *resource
= mlt_properties_get( properties
, "luma" );
621 if ( luma_width
== 0 || luma_height
== 0 )
624 luma_height
= height
;
627 if ( resource
&& resource
[0] && strchr( resource
, '%' ) )
629 // TODO: Clean up quick and dirty compressed/existence check
631 sprintf( temp
, "%s/lumas/%s/%s", mlt_environment( "MLT_DATA" ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource
, '%' ) + 1 );
632 test
= fopen( temp
, "r" );
634 strcat( temp
, ".png" );
640 if ( resource
&& resource
[0] )
642 char *old_luma
= mlt_properties_get( properties
, "_luma" );
643 int old_invert
= mlt_properties_get_int( properties
, "_luma_invert" );
645 if ( invert
!= old_invert
|| ( old_luma
&& old_luma
[0] && strcmp( resource
, old_luma
) ) )
647 mlt_properties_set_data( properties
, "_luma.orig_bitmap", NULL
, 0, NULL
, NULL
);
652 char *old_luma
= mlt_properties_get( properties
, "_luma" );
653 if ( old_luma
&& old_luma
[0] )
655 mlt_properties_set_data( properties
, "_luma.orig_bitmap", NULL
, 0, NULL
, NULL
);
657 mlt_properties_set( properties
, "_luma", NULL
);
661 if ( resource
&& resource
[0] && ( luma_bitmap
== NULL
|| luma_width
!= width
|| luma_height
!= height
) )
663 uint16_t *orig_bitmap
= mlt_properties_get_data( properties
, "_luma.orig_bitmap", NULL
);
664 luma_width
= mlt_properties_get_int( properties
, "_luma.orig_width" );
665 luma_height
= mlt_properties_get_int( properties
, "_luma.orig_height" );
667 // Load the original luma once
668 if ( orig_bitmap
== NULL
)
670 char *extension
= strrchr( resource
, '.' );
672 // See if it is a PGM
673 if ( extension
!= NULL
&& strcmp( extension
, ".pgm" ) == 0 )
676 FILE *f
= fopen( resource
, "r" );
680 luma_read_pgm( f
, &orig_bitmap
, &luma_width
, &luma_height
);
683 // Remember the original size for subsequent scaling
684 mlt_properties_set_data( properties
, "_luma.orig_bitmap", orig_bitmap
, luma_width
* luma_height
* 2, mlt_pool_release
, NULL
);
685 mlt_properties_set_int( properties
, "_luma.orig_width", luma_width
);
686 mlt_properties_set_int( properties
, "_luma.orig_height", luma_height
);
691 // Get the factory producer service
692 char *factory
= mlt_properties_get( properties
, "factory" );
694 // Create the producer
695 mlt_profile profile
= mlt_service_profile( MLT_TRANSITION_SERVICE( this ) );
696 mlt_producer producer
= mlt_factory_producer( profile
, factory
, resource
);
699 if ( producer
!= NULL
)
701 // Get the producer properties
702 mlt_properties producer_properties
= MLT_PRODUCER_PROPERTIES( producer
);
704 // Ensure that we loop
705 mlt_properties_set( producer_properties
, "eof", "loop" );
707 // Now pass all producer. properties on the transition down
708 mlt_properties_pass( producer_properties
, properties
, "luma." );
710 // We will get the alpha frame from the producer
711 mlt_frame luma_frame
= NULL
;
713 // Get the luma frame
714 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer
), &luma_frame
, 0 ) == 0 )
717 mlt_image_format luma_format
= mlt_image_yuv422
;
719 // Get image from the luma producer
720 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame
), "rescale.interp", "none" );
721 mlt_frame_get_image( luma_frame
, &luma_image
, &luma_format
, &luma_width
, &luma_height
, 0 );
723 // Generate the luma map
724 if ( luma_image
!= NULL
&& luma_format
== mlt_image_yuv422
)
725 luma_read_yuv422( luma_image
, &orig_bitmap
, luma_width
, luma_height
);
727 // Remember the original size for subsequent scaling
728 mlt_properties_set_data( properties
, "_luma.orig_bitmap", orig_bitmap
, luma_width
* luma_height
* 2, mlt_pool_release
, NULL
);
729 mlt_properties_set_int( properties
, "_luma.orig_width", luma_width
);
730 mlt_properties_set_int( properties
, "_luma.orig_height", luma_height
);
732 // Cleanup the luma frame
733 mlt_frame_close( luma_frame
);
736 // Cleanup the luma producer
737 mlt_producer_close( producer
);
742 luma_bitmap
= mlt_pool_alloc( width
* height
* sizeof( uint16_t ) );
743 scale_luma( luma_bitmap
, width
, height
, orig_bitmap
, luma_width
, luma_height
, invert
* ( ( 1 << 16 ) - 1 ) );
745 // Remember the scaled luma size to prevent unnecessary scaling
746 mlt_properties_set_int( properties
, "_luma.width", width
);
747 mlt_properties_set_int( properties
, "_luma.height", height
);
748 mlt_properties_set_data( properties
, "_luma.bitmap", luma_bitmap
, width
* height
* 2, mlt_pool_release
, NULL
);
749 mlt_properties_set( properties
, "_luma", resource
);
750 mlt_properties_set_int( properties
, "_luma_invert", invert
);
755 /** Get the properly sized image from b_frame.
758 static int get_b_frame_image( mlt_transition
this, mlt_frame b_frame
, uint8_t **image
, int *width
, int *height
, struct geometry_s
*geometry
)
761 mlt_image_format format
= mlt_image_yuv422
;
763 // Get the properties objects
764 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
765 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
766 uint8_t resize_alpha
= mlt_properties_get_int( b_props
, "resize_alpha" );
768 // Do not scale if we are cropping - the compositing rectangle can crop the b image
769 // TODO: Use the animatable w and h of the crop geometry to scale independently of crop rectangle
770 if ( mlt_properties_get( properties
, "crop" ) )
772 int real_width
= get_value( b_props
, "real_width", "width" );
773 int real_height
= get_value( b_props
, "real_height", "height" );
774 double input_ar
= mlt_properties_get_double( b_props
, "aspect_ratio" );
775 double consumer_ar
= mlt_properties_get_double( b_props
, "consumer_aspect_ratio" );
776 double background_ar
= mlt_properties_get_double( b_props
, "output_ratio" );
777 double output_ar
= background_ar
!= 0.0 ? background_ar
: consumer_ar
;
778 int scaled_width
= rint( ( input_ar
== 0.0 ? output_ar
: input_ar
) / output_ar
* real_width
);
779 int scaled_height
= real_height
;
780 geometry
->sw
= scaled_width
;
781 geometry
->sh
= scaled_height
;
783 // Normalise aspect ratios and scale preserving aspect ratio
784 else if ( mlt_properties_get_int( properties
, "aligned" ) && mlt_properties_get_int( properties
, "distort" ) == 0 && mlt_properties_get_int( b_props
, "distort" ) == 0 && geometry
->item
.distort
== 0 )
786 // Adjust b_frame pixel aspect
787 int normalised_width
= geometry
->item
.w
;
788 int normalised_height
= geometry
->item
.h
;
789 int real_width
= get_value( b_props
, "real_width", "width" );
790 int real_height
= get_value( b_props
, "real_height", "height" );
791 double input_ar
= mlt_properties_get_double( b_props
, "aspect_ratio" );
792 double consumer_ar
= mlt_properties_get_double( b_props
, "consumer_aspect_ratio" );
793 double background_ar
= mlt_properties_get_double( b_props
, "output_ratio" );
794 double output_ar
= background_ar
!= 0.0 ? background_ar
: consumer_ar
;
795 int scaled_width
= rint( ( input_ar
== 0.0 ? output_ar
: input_ar
) / output_ar
* real_width
);
796 int scaled_height
= real_height
;
797 // fprintf(stderr, "%s: scaled %dx%d norm %dx%d real %dx%d output_ar %f => %f\n", __FILE__,
798 // scaled_width, scaled_height, normalised_width, normalised_height, real_width, real_height,
799 // background_ar, output_ar);
801 // Now ensure that our images fit in the normalised frame
802 if ( scaled_width
> normalised_width
)
804 scaled_height
= rint( scaled_height
* normalised_width
/ scaled_width
);
805 scaled_width
= normalised_width
;
807 if ( scaled_height
> normalised_height
)
809 scaled_width
= rint( scaled_width
* normalised_height
/ scaled_height
);
810 scaled_height
= normalised_height
;
813 // Honour the fill request - this will scale the image to fill width or height while maintaining a/r
814 // ????: Shouln't this be the default behaviour?
815 if ( mlt_properties_get_int( properties
, "fill" ) && scaled_width
> 0 && scaled_height
> 0 )
817 if ( scaled_height
< normalised_height
&& scaled_width
* normalised_height
/ scaled_height
<= normalised_width
)
819 scaled_width
= rint( scaled_width
* normalised_height
/ scaled_height
);
820 scaled_height
= normalised_height
;
822 else if ( scaled_width
< normalised_width
&& scaled_height
* normalised_width
/ scaled_width
< normalised_height
)
824 scaled_height
= rint( scaled_height
* normalised_width
/ scaled_width
);
825 scaled_width
= normalised_width
;
829 // Save the new scaled dimensions
830 geometry
->sw
= scaled_width
;
831 geometry
->sh
= scaled_height
;
835 geometry
->sw
= geometry
->item
.w
;
836 geometry
->sh
= geometry
->item
.h
;
839 // We want to ensure that we bypass resize now...
840 if ( resize_alpha
== 0 )
841 mlt_properties_set_int( b_props
, "distort", mlt_properties_get_int( properties
, "distort" ) );
843 // If we're not aligned, we want a non-transparent background
844 if ( mlt_properties_get_int( properties
, "aligned" ) == 0 )
845 mlt_properties_set_int( b_props
, "resize_alpha", 255 );
847 // Take into consideration alignment for optimisation (titles are a special case)
848 if ( !mlt_properties_get_int( properties
, "titles" ) &&
849 mlt_properties_get( properties
, "crop" ) == NULL
)
850 alignment_calculate( geometry
);
852 // Adjust to consumer scale
853 *width
= rint( geometry
->sw
* *width
/ geometry
->nw
);
854 *height
= rint( geometry
->sh
* *height
/ geometry
->nh
);
855 // fprintf(stderr, "%s: scaled %dx%d norm %dx%d resize %dx%d\n", __FILE__,
856 // geometry->sw, geometry->sh, geometry->nw, geometry->nh, *width, *height);
858 ret
= mlt_frame_get_image( b_frame
, image
, &format
, width
, height
, 1 );
860 // Set the frame back
861 mlt_properties_set_int( b_props
, "resize_alpha", resize_alpha
);
863 return ret
&& image
!= NULL
;
866 static void crop_calculate( mlt_transition
this, mlt_properties properties
, struct geometry_s
*result
, double position
)
868 // Initialize panning info
871 if ( mlt_properties_get( properties
, "crop" ) )
873 mlt_geometry crop
= mlt_properties_get_data( properties
, "crop_geometry", NULL
);
876 crop
= mlt_geometry_init();
877 mlt_position in
= mlt_transition_get_in( this );
878 mlt_position out
= mlt_transition_get_out( this );
879 int length
= out
- in
+ 1;
880 double cycle
= mlt_properties_get_double( properties
, "cycle" );
882 // Allow a geometry repeat cycle
885 else if ( cycle
> 0 )
887 mlt_geometry_parse( crop
, mlt_properties_get( properties
, "crop" ), length
, result
->sw
, result
->sh
);
888 mlt_properties_set_data( properties
, "crop_geometry", crop
, 0, (mlt_destructor
)mlt_geometry_close
, NULL
);
892 int length
= mlt_geometry_get_length( crop
);
893 int mirror_off
= mlt_properties_get_int( properties
, "mirror_off" );
894 int repeat_off
= mlt_properties_get_int( properties
, "repeat_off" );
895 if ( !repeat_off
&& position
>= length
&& length
!= 0 )
897 int section
= position
/ length
;
898 position
-= section
* length
;
899 if ( !mirror_off
&& section
% 2 == 1 )
900 position
= length
- position
;
904 struct mlt_geometry_item_s crop_item
;
905 mlt_geometry_fetch( crop
, &crop_item
, position
);
906 result
->x_src
= rint( crop_item
.x
);
907 result
->y_src
= rint( crop_item
.y
);
911 static mlt_geometry
composite_calculate( mlt_transition
this, struct geometry_s
*result
, mlt_frame a_frame
, double position
)
913 // Get the properties from the transition
914 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
916 // Get the properties from the frame
917 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
919 // Structures for geometry
920 mlt_geometry start
= mlt_properties_get_data( properties
, "geometries", NULL
);
922 // Obtain the normalised width and height from the a_frame
923 int normalised_width
= mlt_properties_get_int( a_props
, "normalised_width" );
924 int normalised_height
= mlt_properties_get_int( a_props
, "normalised_height" );
926 char *name
= mlt_properties_get( properties
, "_unique_id" );
929 sprintf( key
, "%s.in", name
);
930 if ( mlt_properties_get( a_props
, key
) )
932 sscanf( mlt_properties_get( a_props
, key
), "%f,%f,%f,%f,%f,%d,%d", &result
->item
.x
, &result
->item
.y
, &result
->item
.w
, &result
->item
.h
, &result
->item
.mix
, &result
->nw
, &result
->nh
);
936 // Now parse the geometries
939 // Parse the transitions properties
940 start
= transition_parse_keys( this, normalised_width
, normalised_height
);
942 // Assign to properties to ensure we get destroyed
943 mlt_properties_set_data( properties
, "geometries", start
, 0, ( mlt_destructor
)mlt_geometry_close
, NULL
);
947 int length
= mlt_transition_get_out( this ) - mlt_transition_get_in( this ) + 1;
948 double cycle
= mlt_properties_get_double( properties
, "cycle" );
951 else if ( cycle
> 0 )
953 mlt_geometry_refresh( start
, mlt_properties_get( properties
, "geometry" ), length
, normalised_width
, normalised_height
);
956 // Do the calculation
957 geometry_calculate( this, result
, position
);
959 // Assign normalised info
960 result
->nw
= normalised_width
;
961 result
->nh
= normalised_height
;
964 // Now parse the alignment
965 result
->halign
= alignment_parse( mlt_properties_get( properties
, "halign" ) );
966 result
->valign
= alignment_parse( mlt_properties_get( properties
, "valign" ) );
968 crop_calculate( this, properties
, result
, position
);
973 mlt_frame
composite_copy_region( mlt_transition
this, mlt_frame a_frame
, mlt_position frame_position
)
975 // Create a frame to return
976 mlt_frame b_frame
= mlt_frame_init( MLT_TRANSITION_SERVICE( this ) );
978 // Get the properties of the a frame
979 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
981 // Get the properties of the b frame
982 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
985 int position
= position_calculate( this, frame_position
);
987 // Get the unique id of the transition
988 char *name
= mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
992 uint8_t *dest
= NULL
;
994 // Get the image and dimensions
995 uint8_t *image
= mlt_properties_get_data( a_props
, "image", NULL
);
996 int width
= mlt_properties_get_int( a_props
, "width" );
997 int height
= mlt_properties_get_int( a_props
, "height" );
998 int format
= mlt_properties_get_int( a_props
, "format" );
1000 // Pointers for copy operation
1012 // Will need to know region to copy
1013 struct geometry_s result
;
1015 // Calculate the region now
1016 composite_calculate( this, &result
, a_frame
, position
);
1018 // Need to scale down to actual dimensions
1019 x
= rint( result
.item
.x
* width
/ result
.nw
);
1020 y
= rint( result
.item
.y
* height
/ result
.nh
);
1021 w
= rint( result
.item
.w
* width
/ result
.nw
);
1022 h
= rint( result
.item
.h
* height
/ result
.nh
);
1031 sprintf( key
, "%s.in=%d,%d,%d,%d,%f,%d,%d", name
, x
, y
, w
, h
, result
.item
.mix
, width
, height
);
1032 mlt_properties_parse( a_props
, key
);
1033 sprintf( key
, "%s.out=%d,%d,%d,%d,%f,%d,%d", name
, x
, y
, w
, h
, result
.item
.mix
, width
, height
);
1034 mlt_properties_parse( a_props
, key
);
1039 // Now we need to create a new destination image
1040 dest
= mlt_pool_alloc( w
* h
* 2 );
1042 // Assign to the new frame
1043 mlt_properties_set_data( b_props
, "image", dest
, w
* h
* 2, mlt_pool_release
, NULL
);
1044 mlt_properties_set_int( b_props
, "width", w
);
1045 mlt_properties_set_int( b_props
, "height", h
);
1046 mlt_properties_set_int( b_props
, "format", format
);
1050 dest
+= ( ds
* -y
);
1055 if ( y
+ h
> height
)
1056 h
-= ( y
+ h
- height
);
1065 if ( w
> 0 && h
> 0 )
1067 // Copy the region of the image
1068 p
= image
+ y
* ss
+ x
* 2;
1072 memcpy( dest
, p
, w
* 2 );
1078 // Assign this position to the b frame
1079 mlt_frame_set_position( b_frame
, frame_position
);
1080 mlt_properties_set_int( b_props
, "distort", 1 );
1089 static int transition_get_image( mlt_frame a_frame
, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
1091 // Get the b frame from the stack
1092 mlt_frame b_frame
= mlt_frame_pop_frame( a_frame
);
1094 // Get the transition from the a frame
1095 mlt_transition
this = mlt_frame_pop_service( a_frame
);
1098 double position
= mlt_deque_pop_back_double( MLT_FRAME_IMAGE_STACK( a_frame
) );
1099 int out
= mlt_frame_pop_service_int( a_frame
);
1100 int in
= mlt_frame_pop_service_int( a_frame
);
1102 // Get the properties from the transition
1103 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
1105 // TODO: clean up always_active behaviour
1106 if ( mlt_properties_get_int( properties
, "always_active" ) )
1108 mlt_events_block( properties
, properties
);
1109 mlt_properties_set_int( properties
, "in", in
);
1110 mlt_properties_set_int( properties
, "out", out
);
1111 mlt_events_unblock( properties
, properties
);
1114 // This compositer is yuv422 only
1115 *format
= mlt_image_yuv422
;
1117 if ( b_frame
!= NULL
)
1119 // Get the properties of the a frame
1120 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
1122 // Get the properties of the b frame
1123 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
1125 // Structures for geometry
1126 struct geometry_s result
;
1128 // Calculate the position
1129 double delta
= delta_calculate( this, a_frame
, position
);
1131 // Get the image from the b frame
1132 uint8_t *image_b
= NULL
;
1133 int width_b
= *width
;
1134 int height_b
= *height
;
1137 uint8_t *alpha_a
= NULL
;
1138 uint8_t *alpha_b
= NULL
;
1140 // Composites always need scaling... defaulting to lowest
1141 char *rescale
= mlt_properties_get( a_props
, "rescale.interp" );
1142 if ( rescale
== NULL
|| !strcmp( rescale
, "none" ) )
1143 rescale
= "nearest";
1144 mlt_properties_set( a_props
, "rescale.interp", rescale
);
1145 mlt_properties_set( b_props
, "rescale.interp", rescale
);
1147 // Do the calculation
1148 // NB: Locks needed here since the properties are being modified
1149 mlt_service_lock( MLT_TRANSITION_SERVICE( this ) );
1150 composite_calculate( this, &result
, a_frame
, position
);
1151 mlt_service_unlock( MLT_TRANSITION_SERVICE( this ) );
1153 // Since we are the consumer of the b_frame, we must pass along these
1154 // consumer properties from the a_frame
1155 mlt_properties_set_int( b_props
, "consumer_deinterlace", mlt_properties_get_int( a_props
, "consumer_deinterlace" ) || mlt_properties_get_int( properties
, "deinterlace" ) );
1156 mlt_properties_set( b_props
, "consumer_deinterlace_method", mlt_properties_get( a_props
, "consumer_deinterlace_method" ) );
1157 mlt_properties_set_double( b_props
, "consumer_aspect_ratio", mlt_properties_get_double( a_props
, "consumer_aspect_ratio" ) );
1159 // TODO: Dangerous/temporary optimisation - if nothing to do, then do nothing
1160 if ( mlt_properties_get_int( properties
, "no_alpha" ) &&
1161 result
.item
.x
== 0 && result
.item
.y
== 0 && result
.item
.w
== *width
&& result
.item
.h
== *height
&& result
.item
.mix
== 100 )
1163 mlt_frame_get_image( b_frame
, image
, format
, width
, height
, 1 );
1164 if ( !mlt_frame_is_test_card( a_frame
) )
1165 mlt_frame_replace_image( a_frame
, *image
, *format
, *width
, *height
);
1169 if ( a_frame
== b_frame
)
1171 double aspect_ratio
= mlt_frame_get_aspect_ratio( b_frame
);
1172 get_b_frame_image( this, b_frame
, &image_b
, &width_b
, &height_b
, &result
);
1173 alpha_b
= mlt_frame_get_alpha_mask( b_frame
);
1174 mlt_properties_set_double( a_props
, "aspect_ratio", aspect_ratio
);
1177 // Get the image from the a frame
1178 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, 1 );
1179 alpha_a
= mlt_frame_get_alpha_mask( a_frame
);
1181 // Optimisation - no compositing required
1182 if ( result
.item
.mix
== 0 || ( result
.item
.w
== 0 && result
.item
.h
== 0 ) )
1185 // Need to keep the width/height of the a_frame on the b_frame for titling
1186 if ( mlt_properties_get( a_props
, "dest_width" ) == NULL
)
1188 mlt_properties_set_int( a_props
, "dest_width", *width
);
1189 mlt_properties_set_int( a_props
, "dest_height", *height
);
1190 mlt_properties_set_int( b_props
, "dest_width", *width
);
1191 mlt_properties_set_int( b_props
, "dest_height", *height
);
1195 mlt_properties_set_int( b_props
, "dest_width", mlt_properties_get_int( a_props
, "dest_width" ) );
1196 mlt_properties_set_int( b_props
, "dest_height", mlt_properties_get_int( a_props
, "dest_height" ) );
1199 // Special case for titling...
1200 if ( mlt_properties_get_int( properties
, "titles" ) )
1202 if ( mlt_properties_get( b_props
, "rescale.interp" ) == NULL
)
1203 mlt_properties_set( b_props
, "rescale.interp", "hyper" );
1204 width_b
= mlt_properties_get_int( a_props
, "dest_width" );
1205 height_b
= mlt_properties_get_int( a_props
, "dest_height" );
1208 if ( *image
!= image_b
&& ( image_b
!= NULL
|| get_b_frame_image( this, b_frame
, &image_b
, &width_b
, &height_b
, &result
) == 0 ) )
1210 uint8_t *dest
= *image
;
1211 uint8_t *src
= image_b
;
1213 mlt_properties_get_int( a_props
, "consumer_deinterlace" ) ||
1214 mlt_properties_get_int( properties
, "progressive" );
1217 int32_t luma_softness
= mlt_properties_get_double( properties
, "softness" ) * ( 1 << 16 );
1218 uint16_t *luma_bitmap
= get_luma( this, properties
, width_b
, height_b
);
1219 char *operator = mlt_properties_get( properties
, "operator" );
1221 alpha_b
= alpha_b
== NULL ?
mlt_frame_get_alpha_mask( b_frame
) : alpha_b
;
1223 composite_line_fn line_fn
= composite_line_yuv
;
1225 // Replacement and override
1226 if ( operator != NULL
)
1228 if ( !strcmp( operator, "or" ) )
1229 line_fn
= composite_line_yuv_or
;
1230 if ( !strcmp( operator, "and" ) )
1231 line_fn
= composite_line_yuv_and
;
1232 if ( !strcmp( operator, "xor" ) )
1233 line_fn
= composite_line_yuv_xor
;
1236 // Allow the user to completely obliterate the alpha channels from both frames
1237 if ( mlt_properties_get( properties
, "alpha_a" ) )
1238 memset( alpha_a
, mlt_properties_get_int( properties
, "alpha_a" ), *width
* *height
);
1240 if ( mlt_properties_get( properties
, "alpha_b" ) )
1241 memset( alpha_b
, mlt_properties_get_int( properties
, "alpha_b" ), width_b
* height_b
);
1243 for ( field
= 0; field
< ( progressive ?
1 : 2 ); field
++ )
1245 // Assume lower field (0) first
1246 double field_position
= position
+ field
* delta
;
1248 // Do the calculation if we need to
1249 // NB: Locks needed here since the properties are being modified
1250 mlt_service_lock( MLT_TRANSITION_SERVICE( this ) );
1251 composite_calculate( this, &result
, a_frame
, field_position
);
1252 mlt_service_unlock( MLT_TRANSITION_SERVICE( this ) );
1254 if ( mlt_properties_get_int( properties
, "titles" ) )
1256 result
.item
.w
= rint( *width
* ( result
.item
.w
/ result
.nw
) );
1257 result
.nw
= result
.item
.w
;
1258 result
.item
.h
= rint( *height
* ( result
.item
.h
/ result
.nh
) );
1259 result
.nh
= *height
;
1260 result
.sw
= width_b
;
1261 result
.sh
= height_b
;
1265 if ( mlt_properties_get( properties
, "crop" ) )
1267 if ( result
.x_src
== 0 )
1268 width_b
= width_b
> result
.item
.w ? result
.item
.w
: width_b
;
1269 if ( result
.y_src
== 0 )
1270 height_b
= height_b
> result
.item
.h ? result
.item
.h
: height_b
;
1275 alignment_calculate( &result
);
1278 // Composite the b_frame on the a_frame
1279 composite_yuv( dest
, *width
, *height
, src
, width_b
, height_b
, alpha_b
, alpha_a
, result
, progressive ?
-1 : field
, luma_bitmap
, luma_softness
, line_fn
);
1285 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, 1 );
1291 /** Composition transition processing.
1294 static mlt_frame
composite_process( mlt_transition
this, mlt_frame a_frame
, mlt_frame b_frame
)
1296 // UGH - this is a TODO - find a more reliable means of obtaining in/out for the always_active case
1297 if ( mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "always_active" ) == 0 )
1299 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "in" ) );
1300 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "out" ) );
1301 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame
), position_calculate( this, mlt_frame_get_position( a_frame
) ) );
1305 mlt_properties props
= mlt_properties_get_data( MLT_FRAME_PROPERTIES( b_frame
), "_producer", NULL
);
1306 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( props
, "in" ) );
1307 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( props
, "out" ) );
1308 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame
), mlt_properties_get_int( props
, "_frame" ) - mlt_properties_get_int( props
, "in" ) );
1311 mlt_frame_push_service( a_frame
, this );
1312 mlt_frame_push_frame( a_frame
, b_frame
);
1313 mlt_frame_push_get_image( a_frame
, transition_get_image
);
1317 /** Constructor for the filter.
1320 mlt_transition
transition_composite_init( mlt_profile profile
, mlt_service_type type
, const char *id
, char *arg
)
1322 mlt_transition
this = calloc( sizeof( struct mlt_transition_s
), 1 );
1323 if ( this != NULL
&& mlt_transition_init( this, NULL
) == 0 )
1325 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
1327 this->process
= composite_process
;
1329 // Default starting motion and zoom
1330 mlt_properties_set( properties
, "start", arg
!= NULL ? arg
: "0,0:100%x100%" );
1333 mlt_properties_set( properties
, "factory", "fezzik" );
1335 // Use alignment (and hence alpha of b frame)
1336 mlt_properties_set_int( properties
, "aligned", 1 );
1338 // Inform apps and framework that this is a video only transition
1339 mlt_properties_set_int( properties
, "_transition_type", 1 );