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
!= NULL
&& 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
!= NULL
&& ( luma_bitmap
== NULL
|| luma_width
!= width
|| luma_height
!= height
) )
642 uint16_t *orig_bitmap
= mlt_properties_get_data( properties
, "_luma.orig_bitmap", NULL
);
643 luma_width
= mlt_properties_get_int( properties
, "_luma.orig_width" );
644 luma_height
= mlt_properties_get_int( properties
, "_luma.orig_height" );
646 // Load the original luma once
647 if ( orig_bitmap
== NULL
)
649 char *extension
= strrchr( resource
, '.' );
651 // See if it is a PGM
652 if ( extension
!= NULL
&& strcmp( extension
, ".pgm" ) == 0 )
655 FILE *f
= fopen( resource
, "r" );
659 luma_read_pgm( f
, &orig_bitmap
, &luma_width
, &luma_height
);
662 // Remember the original size for subsequent scaling
663 mlt_properties_set_data( properties
, "_luma.orig_bitmap", orig_bitmap
, luma_width
* luma_height
* 2, mlt_pool_release
, NULL
);
664 mlt_properties_set_int( properties
, "_luma.orig_width", luma_width
);
665 mlt_properties_set_int( properties
, "_luma.orig_height", luma_height
);
670 // Get the factory producer service
671 char *factory
= mlt_properties_get( properties
, "factory" );
673 // Create the producer
674 mlt_profile profile
= mlt_service_profile( MLT_TRANSITION_SERVICE( this ) );
675 mlt_producer producer
= mlt_factory_producer( profile
, factory
, resource
);
678 if ( producer
!= NULL
)
680 // Get the producer properties
681 mlt_properties producer_properties
= MLT_PRODUCER_PROPERTIES( producer
);
683 // Ensure that we loop
684 mlt_properties_set( producer_properties
, "eof", "loop" );
686 // Now pass all producer. properties on the transition down
687 mlt_properties_pass( producer_properties
, properties
, "luma." );
689 // We will get the alpha frame from the producer
690 mlt_frame luma_frame
= NULL
;
692 // Get the luma frame
693 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer
), &luma_frame
, 0 ) == 0 )
696 mlt_image_format luma_format
= mlt_image_yuv422
;
698 // Get image from the luma producer
699 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame
), "rescale.interp", "none" );
700 mlt_frame_get_image( luma_frame
, &luma_image
, &luma_format
, &luma_width
, &luma_height
, 0 );
702 // Generate the luma map
703 if ( luma_image
!= NULL
&& luma_format
== mlt_image_yuv422
)
704 luma_read_yuv422( luma_image
, &orig_bitmap
, luma_width
, luma_height
);
706 // Remember the original size for subsequent scaling
707 mlt_properties_set_data( properties
, "_luma.orig_bitmap", orig_bitmap
, luma_width
* luma_height
* 2, mlt_pool_release
, NULL
);
708 mlt_properties_set_int( properties
, "_luma.orig_width", luma_width
);
709 mlt_properties_set_int( properties
, "_luma.orig_height", luma_height
);
711 // Cleanup the luma frame
712 mlt_frame_close( luma_frame
);
715 // Cleanup the luma producer
716 mlt_producer_close( producer
);
721 luma_bitmap
= mlt_pool_alloc( width
* height
* sizeof( uint16_t ) );
722 scale_luma( luma_bitmap
, width
, height
, orig_bitmap
, luma_width
, luma_height
, invert
* ( ( 1 << 16 ) - 1 ) );
724 // Remember the scaled luma size to prevent unnecessary scaling
725 mlt_properties_set_int( properties
, "_luma.width", width
);
726 mlt_properties_set_int( properties
, "_luma.height", height
);
727 mlt_properties_set_data( properties
, "_luma.bitmap", luma_bitmap
, width
* height
* 2, mlt_pool_release
, NULL
);
732 /** Get the properly sized image from b_frame.
735 static int get_b_frame_image( mlt_transition
this, mlt_frame b_frame
, uint8_t **image
, int *width
, int *height
, struct geometry_s
*geometry
)
738 mlt_image_format format
= mlt_image_yuv422
;
740 // Get the properties objects
741 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
742 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
743 uint8_t resize_alpha
= mlt_properties_get_int( b_props
, "resize_alpha" );
745 // Do not scale if we are cropping - the compositing rectangle can crop the b image
746 // TODO: Use the animatable w and h of the crop geometry to scale independently of crop rectangle
747 if ( mlt_properties_get( properties
, "crop" ) )
749 int real_width
= get_value( b_props
, "real_width", "width" );
750 int real_height
= get_value( b_props
, "real_height", "height" );
751 double input_ar
= mlt_properties_get_double( b_props
, "aspect_ratio" );
752 double consumer_ar
= mlt_properties_get_double( b_props
, "consumer_aspect_ratio" );
753 double background_ar
= mlt_properties_get_double( b_props
, "output_ratio" );
754 double output_ar
= background_ar
!= 0.0 ? background_ar
: consumer_ar
;
755 int scaled_width
= rint( ( input_ar
== 0.0 ? output_ar
: input_ar
) / output_ar
* real_width
);
756 int scaled_height
= real_height
;
757 geometry
->sw
= scaled_width
;
758 geometry
->sh
= scaled_height
;
760 // Normalise aspect ratios and scale preserving aspect ratio
761 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 )
763 // Adjust b_frame pixel aspect
764 int normalised_width
= geometry
->item
.w
;
765 int normalised_height
= geometry
->item
.h
;
766 int real_width
= get_value( b_props
, "real_width", "width" );
767 int real_height
= get_value( b_props
, "real_height", "height" );
768 double input_ar
= mlt_properties_get_double( b_props
, "aspect_ratio" );
769 double consumer_ar
= mlt_properties_get_double( b_props
, "consumer_aspect_ratio" );
770 double background_ar
= mlt_properties_get_double( b_props
, "output_ratio" );
771 double output_ar
= background_ar
!= 0.0 ? background_ar
: consumer_ar
;
772 int scaled_width
= rint( ( input_ar
== 0.0 ? output_ar
: input_ar
) / output_ar
* real_width
);
773 int scaled_height
= real_height
;
774 // fprintf(stderr, "%s: scaled %dx%d norm %dx%d real %dx%d output_ar %f => %f\n", __FILE__,
775 // scaled_width, scaled_height, normalised_width, normalised_height, real_width, real_height,
776 // background_ar, output_ar);
778 // Now ensure that our images fit in the normalised frame
779 if ( scaled_width
> normalised_width
)
781 scaled_height
= rint( scaled_height
* normalised_width
/ scaled_width
);
782 scaled_width
= normalised_width
;
784 if ( scaled_height
> normalised_height
)
786 scaled_width
= rint( scaled_width
* normalised_height
/ scaled_height
);
787 scaled_height
= normalised_height
;
790 // Honour the fill request - this will scale the image to fill width or height while maintaining a/r
791 // ????: Shouln't this be the default behaviour?
792 if ( mlt_properties_get_int( properties
, "fill" ) && scaled_width
> 0 && scaled_height
> 0 )
794 if ( scaled_height
< normalised_height
&& scaled_width
* normalised_height
/ scaled_height
<= normalised_width
)
796 scaled_width
= rint( scaled_width
* normalised_height
/ scaled_height
);
797 scaled_height
= normalised_height
;
799 else if ( scaled_width
< normalised_width
&& scaled_height
* normalised_width
/ scaled_width
< normalised_height
)
801 scaled_height
= rint( scaled_height
* normalised_width
/ scaled_width
);
802 scaled_width
= normalised_width
;
806 // Save the new scaled dimensions
807 geometry
->sw
= scaled_width
;
808 geometry
->sh
= scaled_height
;
812 geometry
->sw
= geometry
->item
.w
;
813 geometry
->sh
= geometry
->item
.h
;
816 // We want to ensure that we bypass resize now...
817 if ( resize_alpha
== 0 )
818 mlt_properties_set_int( b_props
, "distort", mlt_properties_get_int( properties
, "distort" ) );
820 // If we're not aligned, we want a non-transparent background
821 if ( mlt_properties_get_int( properties
, "aligned" ) == 0 )
822 mlt_properties_set_int( b_props
, "resize_alpha", 255 );
824 // Take into consideration alignment for optimisation (titles are a special case)
825 if ( !mlt_properties_get_int( properties
, "titles" ) &&
826 mlt_properties_get( properties
, "crop" ) == NULL
)
827 alignment_calculate( geometry
);
829 // Adjust to consumer scale
830 *width
= rint( geometry
->sw
* *width
/ geometry
->nw
);
831 *height
= rint( geometry
->sh
* *height
/ geometry
->nh
);
832 // fprintf(stderr, "%s: scaled %dx%d norm %dx%d resize %dx%d\n", __FILE__,
833 // geometry->sw, geometry->sh, geometry->nw, geometry->nh, *width, *height);
835 ret
= mlt_frame_get_image( b_frame
, image
, &format
, width
, height
, 1 );
837 // Set the frame back
838 mlt_properties_set_int( b_props
, "resize_alpha", resize_alpha
);
840 return ret
&& image
!= NULL
;
843 static void crop_calculate( mlt_transition
this, mlt_properties properties
, struct geometry_s
*result
, double position
)
845 // Initialize panning info
848 if ( mlt_properties_get( properties
, "crop" ) )
850 mlt_geometry crop
= mlt_properties_get_data( properties
, "crop_geometry", NULL
);
853 crop
= mlt_geometry_init();
854 mlt_position in
= mlt_transition_get_in( this );
855 mlt_position out
= mlt_transition_get_out( this );
856 int length
= out
- in
+ 1;
857 double cycle
= mlt_properties_get_double( properties
, "cycle" );
859 // Allow a geometry repeat cycle
862 else if ( cycle
> 0 )
864 mlt_geometry_parse( crop
, mlt_properties_get( properties
, "crop" ), length
, result
->sw
, result
->sh
);
865 mlt_properties_set_data( properties
, "crop_geometry", crop
, 0, (mlt_destructor
)mlt_geometry_close
, NULL
);
869 int length
= mlt_geometry_get_length( crop
);
870 int mirror_off
= mlt_properties_get_int( properties
, "mirror_off" );
871 int repeat_off
= mlt_properties_get_int( properties
, "repeat_off" );
872 if ( !repeat_off
&& position
>= length
&& length
!= 0 )
874 int section
= position
/ length
;
875 position
-= section
* length
;
876 if ( !mirror_off
&& section
% 2 == 1 )
877 position
= length
- position
;
881 struct mlt_geometry_item_s crop_item
;
882 mlt_geometry_fetch( crop
, &crop_item
, position
);
883 result
->x_src
= rint( crop_item
.x
);
884 result
->y_src
= rint( crop_item
.y
);
888 static mlt_geometry
composite_calculate( mlt_transition
this, struct geometry_s
*result
, mlt_frame a_frame
, double position
)
890 // Get the properties from the transition
891 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
893 // Get the properties from the frame
894 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
896 // Structures for geometry
897 mlt_geometry start
= mlt_properties_get_data( properties
, "geometries", NULL
);
899 // Obtain the normalised width and height from the a_frame
900 int normalised_width
= mlt_properties_get_int( a_props
, "normalised_width" );
901 int normalised_height
= mlt_properties_get_int( a_props
, "normalised_height" );
903 char *name
= mlt_properties_get( properties
, "_unique_id" );
906 sprintf( key
, "%s.in", name
);
907 if ( mlt_properties_get( a_props
, key
) )
909 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
);
913 // Now parse the geometries
916 // Parse the transitions properties
917 start
= transition_parse_keys( this, normalised_width
, normalised_height
);
919 // Assign to properties to ensure we get destroyed
920 mlt_properties_set_data( properties
, "geometries", start
, 0, ( mlt_destructor
)mlt_geometry_close
, NULL
);
924 int length
= mlt_transition_get_out( this ) - mlt_transition_get_in( this ) + 1;
925 double cycle
= mlt_properties_get_double( properties
, "cycle" );
928 else if ( cycle
> 0 )
930 mlt_geometry_refresh( start
, mlt_properties_get( properties
, "geometry" ), length
, normalised_width
, normalised_height
);
933 // Do the calculation
934 geometry_calculate( this, result
, position
);
936 // Assign normalised info
937 result
->nw
= normalised_width
;
938 result
->nh
= normalised_height
;
941 // Now parse the alignment
942 result
->halign
= alignment_parse( mlt_properties_get( properties
, "halign" ) );
943 result
->valign
= alignment_parse( mlt_properties_get( properties
, "valign" ) );
945 crop_calculate( this, properties
, result
, position
);
950 mlt_frame
composite_copy_region( mlt_transition
this, mlt_frame a_frame
, mlt_position frame_position
)
952 // Create a frame to return
953 mlt_frame b_frame
= mlt_frame_init( MLT_TRANSITION_SERVICE( this ) );
955 // Get the properties of the a frame
956 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
958 // Get the properties of the b frame
959 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
962 int position
= position_calculate( this, frame_position
);
964 // Get the unique id of the transition
965 char *name
= mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
969 uint8_t *dest
= NULL
;
971 // Get the image and dimensions
972 uint8_t *image
= mlt_properties_get_data( a_props
, "image", NULL
);
973 int width
= mlt_properties_get_int( a_props
, "width" );
974 int height
= mlt_properties_get_int( a_props
, "height" );
975 int format
= mlt_properties_get_int( a_props
, "format" );
977 // Pointers for copy operation
989 // Will need to know region to copy
990 struct geometry_s result
;
992 // Calculate the region now
993 composite_calculate( this, &result
, a_frame
, position
);
995 // Need to scale down to actual dimensions
996 x
= rint( result
.item
.x
* width
/ result
.nw
);
997 y
= rint( result
.item
.y
* height
/ result
.nh
);
998 w
= rint( result
.item
.w
* width
/ result
.nw
);
999 h
= rint( result
.item
.h
* height
/ result
.nh
);
1008 sprintf( key
, "%s.in=%d,%d,%d,%d,%f,%d,%d", name
, x
, y
, w
, h
, result
.item
.mix
, width
, height
);
1009 mlt_properties_parse( a_props
, key
);
1010 sprintf( key
, "%s.out=%d,%d,%d,%d,%f,%d,%d", name
, x
, y
, w
, h
, result
.item
.mix
, width
, height
);
1011 mlt_properties_parse( a_props
, key
);
1016 // Now we need to create a new destination image
1017 dest
= mlt_pool_alloc( w
* h
* 2 );
1019 // Assign to the new frame
1020 mlt_properties_set_data( b_props
, "image", dest
, w
* h
* 2, mlt_pool_release
, NULL
);
1021 mlt_properties_set_int( b_props
, "width", w
);
1022 mlt_properties_set_int( b_props
, "height", h
);
1023 mlt_properties_set_int( b_props
, "format", format
);
1027 dest
+= ( ds
* -y
);
1032 if ( y
+ h
> height
)
1033 h
-= ( y
+ h
- height
);
1042 if ( w
> 0 && h
> 0 )
1044 // Copy the region of the image
1045 p
= image
+ y
* ss
+ x
* 2;
1049 memcpy( dest
, p
, w
* 2 );
1055 // Assign this position to the b frame
1056 mlt_frame_set_position( b_frame
, frame_position
);
1057 mlt_properties_set_int( b_props
, "distort", 1 );
1066 static int transition_get_image( mlt_frame a_frame
, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
1068 // Get the b frame from the stack
1069 mlt_frame b_frame
= mlt_frame_pop_frame( a_frame
);
1071 // Get the transition from the a frame
1072 mlt_transition
this = mlt_frame_pop_service( a_frame
);
1075 double position
= mlt_deque_pop_back_double( MLT_FRAME_IMAGE_STACK( a_frame
) );
1076 int out
= mlt_frame_pop_service_int( a_frame
);
1077 int in
= mlt_frame_pop_service_int( a_frame
);
1079 // Get the properties from the transition
1080 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
1082 // TODO: clean up always_active behaviour
1083 if ( mlt_properties_get_int( properties
, "always_active" ) )
1085 mlt_events_block( properties
, properties
);
1086 mlt_properties_set_int( properties
, "in", in
);
1087 mlt_properties_set_int( properties
, "out", out
);
1088 mlt_events_unblock( properties
, properties
);
1091 // This compositer is yuv422 only
1092 *format
= mlt_image_yuv422
;
1094 if ( b_frame
!= NULL
)
1096 // Get the properties of the a frame
1097 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
1099 // Get the properties of the b frame
1100 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
1102 // Structures for geometry
1103 struct geometry_s result
;
1105 // Calculate the position
1106 double delta
= delta_calculate( this, a_frame
, position
);
1108 // Get the image from the b frame
1109 uint8_t *image_b
= NULL
;
1110 int width_b
= *width
;
1111 int height_b
= *height
;
1114 uint8_t *alpha_a
= NULL
;
1115 uint8_t *alpha_b
= NULL
;
1117 // Composites always need scaling... defaulting to lowest
1118 char *rescale
= mlt_properties_get( a_props
, "rescale.interp" );
1119 if ( rescale
== NULL
|| !strcmp( rescale
, "none" ) )
1120 rescale
= "nearest";
1121 mlt_properties_set( a_props
, "rescale.interp", rescale
);
1122 mlt_properties_set( b_props
, "rescale.interp", rescale
);
1124 // Do the calculation
1125 // NB: Locks needed here since the properties are being modified
1126 mlt_service_lock( MLT_TRANSITION_SERVICE( this ) );
1127 composite_calculate( this, &result
, a_frame
, position
);
1128 mlt_service_unlock( MLT_TRANSITION_SERVICE( this ) );
1130 // Since we are the consumer of the b_frame, we must pass along these
1131 // consumer properties from the a_frame
1132 mlt_properties_set_int( b_props
, "consumer_deinterlace", mlt_properties_get_int( a_props
, "consumer_deinterlace" ) || mlt_properties_get_int( properties
, "deinterlace" ) );
1133 mlt_properties_set( b_props
, "consumer_deinterlace_method", mlt_properties_get( a_props
, "consumer_deinterlace_method" ) );
1134 mlt_properties_set_double( b_props
, "consumer_aspect_ratio", mlt_properties_get_double( a_props
, "consumer_aspect_ratio" ) );
1136 // TODO: Dangerous/temporary optimisation - if nothing to do, then do nothing
1137 if ( mlt_properties_get_int( properties
, "no_alpha" ) &&
1138 result
.item
.x
== 0 && result
.item
.y
== 0 && result
.item
.w
== *width
&& result
.item
.h
== *height
&& result
.item
.mix
== 100 )
1140 mlt_frame_get_image( b_frame
, image
, format
, width
, height
, 1 );
1141 if ( !mlt_frame_is_test_card( a_frame
) )
1142 mlt_frame_replace_image( a_frame
, *image
, *format
, *width
, *height
);
1146 if ( a_frame
== b_frame
)
1148 double aspect_ratio
= mlt_frame_get_aspect_ratio( b_frame
);
1149 get_b_frame_image( this, b_frame
, &image_b
, &width_b
, &height_b
, &result
);
1150 alpha_b
= mlt_frame_get_alpha_mask( b_frame
);
1151 mlt_properties_set_double( a_props
, "aspect_ratio", aspect_ratio
);
1154 // Get the image from the a frame
1155 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, 1 );
1156 alpha_a
= mlt_frame_get_alpha_mask( a_frame
);
1158 // Optimisation - no compositing required
1159 if ( result
.item
.mix
== 0 || ( result
.item
.w
== 0 && result
.item
.h
== 0 ) )
1162 // Need to keep the width/height of the a_frame on the b_frame for titling
1163 if ( mlt_properties_get( a_props
, "dest_width" ) == NULL
)
1165 mlt_properties_set_int( a_props
, "dest_width", *width
);
1166 mlt_properties_set_int( a_props
, "dest_height", *height
);
1167 mlt_properties_set_int( b_props
, "dest_width", *width
);
1168 mlt_properties_set_int( b_props
, "dest_height", *height
);
1172 mlt_properties_set_int( b_props
, "dest_width", mlt_properties_get_int( a_props
, "dest_width" ) );
1173 mlt_properties_set_int( b_props
, "dest_height", mlt_properties_get_int( a_props
, "dest_height" ) );
1176 // Special case for titling...
1177 if ( mlt_properties_get_int( properties
, "titles" ) )
1179 if ( mlt_properties_get( b_props
, "rescale.interp" ) == NULL
)
1180 mlt_properties_set( b_props
, "rescale.interp", "hyper" );
1181 width_b
= mlt_properties_get_int( a_props
, "dest_width" );
1182 height_b
= mlt_properties_get_int( a_props
, "dest_height" );
1185 if ( *image
!= image_b
&& ( image_b
!= NULL
|| get_b_frame_image( this, b_frame
, &image_b
, &width_b
, &height_b
, &result
) == 0 ) )
1187 uint8_t *dest
= *image
;
1188 uint8_t *src
= image_b
;
1190 mlt_properties_get_int( a_props
, "consumer_deinterlace" ) ||
1191 mlt_properties_get_int( properties
, "progressive" );
1194 int32_t luma_softness
= mlt_properties_get_double( properties
, "softness" ) * ( 1 << 16 );
1195 uint16_t *luma_bitmap
= get_luma( this, properties
, width_b
, height_b
);
1196 char *operator = mlt_properties_get( properties
, "operator" );
1198 alpha_b
= alpha_b
== NULL ?
mlt_frame_get_alpha_mask( b_frame
) : alpha_b
;
1200 composite_line_fn line_fn
= composite_line_yuv
;
1202 // Replacement and override
1203 if ( operator != NULL
)
1205 if ( !strcmp( operator, "or" ) )
1206 line_fn
= composite_line_yuv_or
;
1207 if ( !strcmp( operator, "and" ) )
1208 line_fn
= composite_line_yuv_and
;
1209 if ( !strcmp( operator, "xor" ) )
1210 line_fn
= composite_line_yuv_xor
;
1213 // Allow the user to completely obliterate the alpha channels from both frames
1214 if ( mlt_properties_get( properties
, "alpha_a" ) )
1215 memset( alpha_a
, mlt_properties_get_int( properties
, "alpha_a" ), *width
* *height
);
1217 if ( mlt_properties_get( properties
, "alpha_b" ) )
1218 memset( alpha_b
, mlt_properties_get_int( properties
, "alpha_b" ), width_b
* height_b
);
1220 for ( field
= 0; field
< ( progressive ?
1 : 2 ); field
++ )
1222 // Assume lower field (0) first
1223 double field_position
= position
+ field
* delta
;
1225 // Do the calculation if we need to
1226 // NB: Locks needed here since the properties are being modified
1227 mlt_service_lock( MLT_TRANSITION_SERVICE( this ) );
1228 composite_calculate( this, &result
, a_frame
, field_position
);
1229 mlt_service_unlock( MLT_TRANSITION_SERVICE( this ) );
1231 if ( mlt_properties_get_int( properties
, "titles" ) )
1233 result
.item
.w
= rint( *width
* ( result
.item
.w
/ result
.nw
) );
1234 result
.nw
= result
.item
.w
;
1235 result
.item
.h
= rint( *height
* ( result
.item
.h
/ result
.nh
) );
1236 result
.nh
= *height
;
1237 result
.sw
= width_b
;
1238 result
.sh
= height_b
;
1242 if ( mlt_properties_get( properties
, "crop" ) )
1244 if ( result
.x_src
== 0 )
1245 width_b
= width_b
> result
.item
.w ? result
.item
.w
: width_b
;
1246 if ( result
.y_src
== 0 )
1247 height_b
= height_b
> result
.item
.h ? result
.item
.h
: height_b
;
1252 alignment_calculate( &result
);
1255 // Composite the b_frame on the a_frame
1256 composite_yuv( dest
, *width
, *height
, src
, width_b
, height_b
, alpha_b
, alpha_a
, result
, progressive ?
-1 : field
, luma_bitmap
, luma_softness
, line_fn
);
1262 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, 1 );
1268 /** Composition transition processing.
1271 static mlt_frame
composite_process( mlt_transition
this, mlt_frame a_frame
, mlt_frame b_frame
)
1273 // UGH - this is a TODO - find a more reliable means of obtaining in/out for the always_active case
1274 if ( mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "always_active" ) == 0 )
1276 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "in" ) );
1277 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "out" ) );
1278 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame
), position_calculate( this, mlt_frame_get_position( a_frame
) ) );
1282 mlt_properties props
= mlt_properties_get_data( MLT_FRAME_PROPERTIES( b_frame
), "_producer", NULL
);
1283 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( props
, "in" ) );
1284 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( props
, "out" ) );
1285 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame
), mlt_properties_get_int( props
, "_frame" ) - mlt_properties_get_int( props
, "in" ) );
1288 mlt_frame_push_service( a_frame
, this );
1289 mlt_frame_push_frame( a_frame
, b_frame
);
1290 mlt_frame_push_get_image( a_frame
, transition_get_image
);
1294 /** Constructor for the filter.
1297 mlt_transition
transition_composite_init( mlt_profile profile
, mlt_service_type type
, const char *id
, char *arg
)
1299 mlt_transition
this = calloc( sizeof( struct mlt_transition_s
), 1 );
1300 if ( this != NULL
&& mlt_transition_init( this, NULL
) == 0 )
1302 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
1304 this->process
= composite_process
;
1306 // Default starting motion and zoom
1307 mlt_properties_set( properties
, "start", arg
!= NULL ? arg
: "0,0:100%x100%" );
1310 mlt_properties_set( properties
, "factory", "fezzik" );
1312 // Use alignment (and hence alpha of b frame)
1313 mlt_properties_set_int( properties
, "aligned", 1 );
1315 // Inform apps and framework that this is a video only transition
1316 mlt_properties_set_int( properties
, "_transition_type", 1 );