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
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
, mlt_position position
)
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;
196 double x
= ( double )( position
- in
) / length
;
197 double y
= ( double )( position
+ 1 - in
) / length
;
199 return length
* ( y
- x
) / 2.0;
202 static int get_value( mlt_properties properties
, char *preferred
, char *fallback
)
204 int value
= mlt_properties_get_int( properties
, preferred
);
206 value
= mlt_properties_get_int( properties
, fallback
);
210 /** A linear threshold determination function.
213 static inline int32_t linearstep( int32_t edge1
, int32_t edge2
, int32_t a
)
221 return ( ( a
- edge1
) << 16 ) / ( edge2
- edge1
);
224 /** A smoother, non-linear threshold determination function.
227 static inline int32_t smoothstep( int32_t edge1
, int32_t edge2
, uint32_t a
)
235 a
= ( ( a
- edge1
) << 16 ) / ( edge2
- edge1
);
237 return ( ( ( a
* a
) >> 16 ) * ( ( 3 << 16 ) - ( 2 * a
) ) ) >> 16;
240 /** Load the luma map from PGM stream.
243 static void luma_read_pgm( FILE *f
, uint16_t **map
, int *width
, int *height
)
245 uint8_t *data
= NULL
;
257 // get the magic code
258 if ( fgets( line
, 127, f
) == NULL
)
262 while ( sscanf( line
, " #%s", comment
) > 0 )
263 if ( fgets( line
, 127, f
) == NULL
)
266 if ( line
[0] != 'P' || line
[1] != '5' )
269 // skip white space and see if a new line must be fetched
270 for ( i
= 2; i
< 127 && line
[i
] != '\0' && isspace( line
[i
] ); i
++ );
271 if ( ( line
[i
] == '\0' || line
[i
] == '#' ) && fgets( line
, 127, f
) == NULL
)
275 while ( sscanf( line
, " #%s", comment
) > 0 )
276 if ( fgets( line
, 127, f
) == NULL
)
279 // get the dimensions
280 if ( line
[0] == 'P' )
281 i
= sscanf( line
, "P5 %d %d %d", width
, height
, &maxval
);
283 i
= sscanf( line
, "%d %d %d", width
, height
, &maxval
);
285 // get the height value, if not yet
288 if ( fgets( line
, 127, f
) == NULL
)
292 while ( sscanf( line
, " #%s", comment
) > 0 )
293 if ( fgets( line
, 127, f
) == NULL
)
296 i
= sscanf( line
, "%d", height
);
303 // get the maximum gray value, if not yet
306 if ( fgets( line
, 127, f
) == NULL
)
310 while ( sscanf( line
, " #%s", comment
) > 0 )
311 if ( fgets( line
, 127, f
) == NULL
)
314 i
= sscanf( line
, "%d", &maxval
);
319 // determine if this is one or two bytes per pixel
320 bpp
= maxval
> 255 ?
2 : 1;
322 // allocate temporary storage for the raw data
323 data
= mlt_pool_alloc( *width
* *height
* bpp
);
328 if ( fread( data
, *width
* *height
* bpp
, 1, f
) != 1 )
331 // allocate the luma bitmap
332 *map
= p
= (uint16_t*)mlt_pool_alloc( *width
* *height
* sizeof( uint16_t ) );
336 // proces the raw data into the luma bitmap
337 for ( i
= 0; i
< *width
* *height
* bpp
; i
+= bpp
)
340 *p
++ = data
[ i
] << 8;
342 *p
++ = ( data
[ i
] << 8 ) + data
[ i
+ 1 ];
349 mlt_pool_release( data
);
352 /** Generate a luma map from any YUV image.
355 static void luma_read_yuv422( uint8_t *image
, uint16_t **map
, int width
, int height
)
359 // allocate the luma bitmap
360 uint16_t *p
= *map
= ( uint16_t* )mlt_pool_alloc( width
* height
* sizeof( uint16_t ) );
364 // proces the image data into the luma bitmap
365 for ( i
= 0; i
< width
* height
* 2; i
+= 2 )
366 *p
++ = ( image
[ i
] - 16 ) * 299; // 299 = 65535 / 219
369 static inline int calculate_mix( uint16_t *luma
, int j
, int soft
, int weight
, int alpha
)
371 return ( ( ( luma
== NULL
) ? weight
: smoothstep( luma
[ j
], luma
[ j
] + soft
, weight
+ soft
) ) * alpha
) >> 8;
374 static inline uint8_t sample_mix( uint8_t dest
, uint8_t src
, int mix
)
376 return ( src
* mix
+ dest
* ( ( 1 << 16 ) - mix
) ) >> 16;
379 /** Composite a source line over a destination line
382 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
)
387 for ( j
= 0; j
< width
; j
++ )
389 mix
= calculate_mix( luma
, j
, soft
, weight
, *alpha_b
++ );
390 *dest
= sample_mix( *dest
, *src
++, mix
);
392 *dest
= sample_mix( *dest
, *src
++, mix
);
394 *alpha_a
= ( mix
>> 8 ) | *alpha_a
;
399 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
)
404 for ( j
= 0; j
< width
; j
++ )
406 mix
= calculate_mix( luma
, j
, soft
, weight
, *alpha_b
++ | *alpha_a
);
407 *dest
= sample_mix( *dest
, *src
++, mix
);
409 *dest
= sample_mix( *dest
, *src
++, mix
);
411 *alpha_a
++ = mix
>> 8;
415 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
)
420 for ( j
= 0; j
< width
; j
++ )
422 mix
= calculate_mix( luma
, j
, soft
, weight
, *alpha_b
++ & *alpha_a
);
423 *dest
= sample_mix( *dest
, *src
++, mix
);
425 *dest
= sample_mix( *dest
, *src
++, mix
);
427 *alpha_a
++ = mix
>> 8;
431 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
)
436 for ( j
= 0; j
< width
; j
++ )
438 mix
= calculate_mix( luma
, j
, soft
, weight
, *alpha_b
++ ^
*alpha_a
);
439 *dest
= sample_mix( *dest
, *src
++, mix
);
441 *dest
= sample_mix( *dest
, *src
++, mix
);
443 *alpha_a
++ = mix
>> 8;
447 /** Composite function.
450 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
)
454 int x_src
= 0, y_src
= 0;
455 int32_t weight
= ( ( 1 << 16 ) - 1 ) * ( geometry
.item
.mix
/ 100 );
456 int step
= ( field
> -1 ) ?
2 : 1;
458 int stride_src
= width_src
* bpp
;
459 int stride_dest
= width_dest
* bpp
;
461 // Adjust to consumer scale
462 int x
= rint( 0.5 + geometry
.item
.x
* width_dest
/ geometry
.nw
);
463 int y
= rint( 0.5 + geometry
.item
.y
* height_dest
/ geometry
.nh
);
464 int uneven_x
= ( x
% 2 );
466 // optimization points - no work to do
467 if ( width_src
<= 0 || height_src
<= 0 )
470 if ( ( x
< 0 && -x
>= width_src
) || ( y
< 0 && -y
>= height_src
) )
473 // crop overlay off the left edge of frame
481 // crop overlay beyond right edge of frame
482 if ( x
+ width_src
> width_dest
)
483 width_src
= width_dest
- x
;
485 // crop overlay off the top edge of the frame
493 // crop overlay below bottom edge of frame
494 if ( y
+ height_src
> height_dest
)
495 height_src
= height_dest
- y
;
497 // offset pointer into overlay buffer based on cropping
498 p_src
+= x_src
* bpp
+ y_src
* stride_src
;
500 // offset pointer into frame buffer based upon positive coordinates only!
501 p_dest
+= ( x
< 0 ?
0 : x
) * bpp
+ ( y
< 0 ?
0 : y
) * stride_dest
;
503 // offset pointer into alpha channel based upon cropping
504 alpha_b
+= x_src
+ y_src
* stride_src
/ bpp
;
505 alpha_a
+= x
+ y
* stride_dest
/ bpp
;
507 // offset pointer into luma channel based upon cropping
509 p_luma
+= x_src
+ y_src
* stride_src
/ bpp
;
511 // Assuming lower field first
512 // Special care is taken to make sure the b_frame is aligned to the correct field.
513 // field 0 = lower field and y should be odd (y is 0-based).
514 // field 1 = upper field and y should be even.
515 if ( ( field
> -1 ) && ( y
% 2 == field
) )
517 if ( ( field
== 1 && y
< height_dest
- 1 ) || ( field
== 0 && y
== 0 ) )
518 p_dest
+= stride_dest
;
520 p_dest
-= stride_dest
;
523 // On the second field, use the other lines from b_frame
527 alpha_b
+= stride_src
/ bpp
;
528 alpha_a
+= stride_dest
/ bpp
;
534 int alpha_b_stride
= stride_src
/ bpp
;
535 int alpha_a_stride
= stride_dest
/ bpp
;
537 p_src
+= uneven_x
* 2;
538 width_src
-= 2 * uneven_x
;
542 // now do the compositing only to cropped extents
543 for ( i
= 0; i
< height_src
; i
+= step
)
545 line_fn( p_dest
, p_src
, width_src
, alpha_b
, alpha_a
, weight
, p_luma
, softness
);
548 p_dest
+= stride_dest
;
549 alpha_b
+= alpha_b_stride
;
550 alpha_a
+= alpha_a_stride
;
552 p_luma
+= alpha_b_stride
;
559 /** Scale 16bit greyscale luma map using nearest neighbor.
563 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
)
566 register int x_step
= ( src_width
<< 16 ) / dest_width
;
567 register int y_step
= ( src_height
<< 16 ) / dest_height
;
568 register int x
, y
= 0;
570 for ( i
= 0; i
< dest_height
; i
++ )
572 const uint16_t *src
= src_buf
+ ( y
>> 16 ) * src_width
;
575 for ( j
= 0; j
< dest_width
; j
++ )
577 *dest_buf
++ = src
[ x
>> 16 ] ^ invert
;
584 static uint16_t* get_luma( mlt_transition
this, mlt_properties properties
, int width
, int height
)
586 // The cached luma map information
587 int luma_width
= mlt_properties_get_int( properties
, "_luma.width" );
588 int luma_height
= mlt_properties_get_int( properties
, "_luma.height" );
589 uint16_t *luma_bitmap
= mlt_properties_get_data( properties
, "_luma.bitmap", NULL
);
590 int invert
= mlt_properties_get_int( properties
, "luma_invert" );
592 // If the filename property changed, reload the map
593 char *resource
= mlt_properties_get( properties
, "luma" );
597 if ( luma_width
== 0 || luma_height
== 0 )
600 luma_height
= height
;
603 if ( resource
!= NULL
&& strchr( resource
, '%' ) )
605 // TODO: Clean up quick and dirty compressed/existence check
607 sprintf( temp
, "%s/lumas/%s/%s", mlt_environment( "MLT_DATA" ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource
, '%' ) + 1 );
608 test
= fopen( temp
, "r" );
610 strcat( temp
, ".png" );
616 if ( resource
!= NULL
&& ( luma_bitmap
== NULL
|| luma_width
!= width
|| luma_height
!= height
) )
618 uint16_t *orig_bitmap
= mlt_properties_get_data( properties
, "_luma.orig_bitmap", NULL
);
619 luma_width
= mlt_properties_get_int( properties
, "_luma.orig_width" );
620 luma_height
= mlt_properties_get_int( properties
, "_luma.orig_height" );
622 // Load the original luma once
623 if ( orig_bitmap
== NULL
)
625 char *extension
= strrchr( resource
, '.' );
627 // See if it is a PGM
628 if ( extension
!= NULL
&& strcmp( extension
, ".pgm" ) == 0 )
631 FILE *f
= fopen( resource
, "r" );
635 luma_read_pgm( f
, &orig_bitmap
, &luma_width
, &luma_height
);
638 // Remember the original size for subsequent scaling
639 mlt_properties_set_data( properties
, "_luma.orig_bitmap", orig_bitmap
, luma_width
* luma_height
* 2, mlt_pool_release
, NULL
);
640 mlt_properties_set_int( properties
, "_luma.orig_width", luma_width
);
641 mlt_properties_set_int( properties
, "_luma.orig_height", luma_height
);
646 // Get the factory producer service
647 char *factory
= mlt_properties_get( properties
, "factory" );
649 // Create the producer
650 mlt_profile profile
= mlt_service_profile( MLT_TRANSITION_SERVICE( this ) );
651 mlt_producer producer
= mlt_factory_producer( profile
, factory
, resource
);
654 if ( producer
!= NULL
)
656 // Get the producer properties
657 mlt_properties producer_properties
= MLT_PRODUCER_PROPERTIES( producer
);
659 // Ensure that we loop
660 mlt_properties_set( producer_properties
, "eof", "loop" );
662 // Now pass all producer. properties on the transition down
663 mlt_properties_pass( producer_properties
, properties
, "luma." );
665 // We will get the alpha frame from the producer
666 mlt_frame luma_frame
= NULL
;
668 // Get the luma frame
669 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer
), &luma_frame
, 0 ) == 0 )
672 mlt_image_format luma_format
= mlt_image_yuv422
;
674 // Get image from the luma producer
675 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame
), "rescale.interp", "none" );
676 mlt_frame_get_image( luma_frame
, &luma_image
, &luma_format
, &luma_width
, &luma_height
, 0 );
678 // Generate the luma map
679 if ( luma_image
!= NULL
&& luma_format
== mlt_image_yuv422
)
680 luma_read_yuv422( luma_image
, &orig_bitmap
, luma_width
, luma_height
);
682 // Remember the original size for subsequent scaling
683 mlt_properties_set_data( properties
, "_luma.orig_bitmap", orig_bitmap
, luma_width
* luma_height
* 2, mlt_pool_release
, NULL
);
684 mlt_properties_set_int( properties
, "_luma.orig_width", luma_width
);
685 mlt_properties_set_int( properties
, "_luma.orig_height", luma_height
);
687 // Cleanup the luma frame
688 mlt_frame_close( luma_frame
);
691 // Cleanup the luma producer
692 mlt_producer_close( producer
);
697 luma_bitmap
= mlt_pool_alloc( width
* height
* sizeof( uint16_t ) );
698 scale_luma( luma_bitmap
, width
, height
, orig_bitmap
, luma_width
, luma_height
, invert
* ( ( 1 << 16 ) - 1 ) );
700 // Remember the scaled luma size to prevent unnecessary scaling
701 mlt_properties_set_int( properties
, "_luma.width", width
);
702 mlt_properties_set_int( properties
, "_luma.height", height
);
703 mlt_properties_set_data( properties
, "_luma.bitmap", luma_bitmap
, width
* height
* 2, mlt_pool_release
, NULL
);
708 /** Get the properly sized image from b_frame.
711 static int get_b_frame_image( mlt_transition
this, mlt_frame b_frame
, uint8_t **image
, int *width
, int *height
, struct geometry_s
*geometry
)
714 mlt_image_format format
= mlt_image_yuv422
;
716 // Get the properties objects
717 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
718 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
719 uint8_t resize_alpha
= mlt_properties_get_int( b_props
, "resize_alpha" );
721 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 )
723 // Adjust b_frame pixel aspect
724 int normalised_width
= geometry
->item
.w
;
725 int normalised_height
= geometry
->item
.h
;
726 int real_width
= get_value( b_props
, "real_width", "width" );
727 int real_height
= get_value( b_props
, "real_height", "height" );
728 double input_ar
= mlt_properties_get_double( b_props
, "aspect_ratio" );
729 double consumer_ar
= mlt_properties_get_double( b_props
, "consumer_aspect_ratio" );
730 double background_ar
= mlt_properties_get_double( b_props
, "output_ratio" );
731 double output_ar
= background_ar
!= 0.0 ? background_ar
: consumer_ar
;
732 int scaled_width
= rint( 0.5 + ( input_ar
== 0.0 ? output_ar
: input_ar
) / output_ar
* real_width
);
733 int scaled_height
= real_height
;
735 // Now ensure that our images fit in the normalised frame
736 if ( scaled_width
> normalised_width
)
738 scaled_height
= rint( 0.5 + scaled_height
* normalised_width
/ scaled_width
);
739 scaled_width
= normalised_width
;
741 if ( scaled_height
> normalised_height
)
743 scaled_width
= rint( 0.5 + scaled_width
* normalised_height
/ scaled_height
);
744 scaled_height
= normalised_height
;
747 // Honour the fill request - this will scale the image to fill width or height while maintaining a/r
748 // ????: Shouln't this be the default behaviour?
749 if ( mlt_properties_get_int( properties
, "fill" ) && scaled_width
> 0 && scaled_height
> 0 )
751 if ( scaled_height
< normalised_height
&& scaled_width
* normalised_height
/ scaled_height
<= normalised_width
)
753 scaled_width
= rint( 0.5 + scaled_width
* normalised_height
/ scaled_height
);
754 scaled_height
= normalised_height
;
756 else if ( scaled_width
< normalised_width
&& scaled_height
* normalised_width
/ scaled_width
< normalised_height
)
758 scaled_height
= rint( 0.5 + scaled_height
* normalised_width
/ scaled_width
);
759 scaled_width
= normalised_width
;
763 // Save the new scaled dimensions
764 geometry
->sw
= scaled_width
;
765 geometry
->sh
= scaled_height
;
769 geometry
->sw
= geometry
->item
.w
;
770 geometry
->sh
= geometry
->item
.h
;
773 // We want to ensure that we bypass resize now...
774 if ( resize_alpha
== 0 )
775 mlt_properties_set_int( b_props
, "distort", mlt_properties_get_int( properties
, "distort" ) );
777 // If we're not aligned, we want a non-transparent background
778 if ( mlt_properties_get_int( properties
, "aligned" ) == 0 )
779 mlt_properties_set_int( b_props
, "resize_alpha", 255 );
781 // Take into consideration alignment for optimisation (titles are a special case)
782 if ( !mlt_properties_get_int( properties
, "titles" ) )
783 alignment_calculate( geometry
);
785 // Adjust to consumer scale
786 *width
= rint( 0.5 + geometry
->sw
* *width
/ geometry
->nw
);
787 *height
= rint( 0.5 + geometry
->sh
* *height
/ geometry
->nh
);
789 ret
= mlt_frame_get_image( b_frame
, image
, &format
, width
, height
, 1 );
791 // Set the frame back
792 mlt_properties_set_int( b_props
, "resize_alpha", resize_alpha
);
794 return ret
&& image
!= NULL
;
798 static mlt_geometry
composite_calculate( mlt_transition
this, struct geometry_s
*result
, mlt_frame a_frame
, double position
)
800 // Get the properties from the transition
801 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
803 // Get the properties from the frame
804 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
806 // Structures for geometry
807 mlt_geometry start
= mlt_properties_get_data( properties
, "geometries", NULL
);
809 // Obtain the normalised width and height from the a_frame
810 int normalised_width
= mlt_properties_get_int( a_props
, "normalised_width" );
811 int normalised_height
= mlt_properties_get_int( a_props
, "normalised_height" );
813 char *name
= mlt_properties_get( properties
, "_unique_id" );
816 sprintf( key
, "%s.in", name
);
817 if ( mlt_properties_get( a_props
, key
) )
819 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
);
823 // Now parse the geometries
826 // Parse the transitions properties
827 start
= transition_parse_keys( this, normalised_width
, normalised_height
);
829 // Assign to properties to ensure we get destroyed
830 mlt_properties_set_data( properties
, "geometries", start
, 0, ( mlt_destructor
)mlt_geometry_close
, NULL
);
834 int length
= mlt_transition_get_out( this ) - mlt_transition_get_in( this ) + 1;
835 double cycle
= mlt_properties_get_double( properties
, "cycle" );
838 else if ( cycle
> 0 )
840 mlt_geometry_refresh( start
, mlt_properties_get( properties
, "geometry" ), length
, normalised_width
, normalised_height
);
843 // Do the calculation
844 geometry_calculate( this, result
, position
);
846 // Assign normalised info
847 result
->nw
= normalised_width
;
848 result
->nh
= normalised_height
;
851 // Now parse the alignment
852 result
->halign
= alignment_parse( mlt_properties_get( properties
, "halign" ) );
853 result
->valign
= alignment_parse( mlt_properties_get( properties
, "valign" ) );
858 mlt_frame
composite_copy_region( mlt_transition
this, mlt_frame a_frame
, mlt_position frame_position
)
860 // Create a frame to return
861 mlt_frame b_frame
= mlt_frame_init( MLT_TRANSITION_SERVICE( this ) );
863 // Get the properties of the a frame
864 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
866 // Get the properties of the b frame
867 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
870 int position
= position_calculate( this, frame_position
);
872 // Get the unique id of the transition
873 char *name
= mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
877 uint8_t *dest
= NULL
;
879 // Get the image and dimensions
880 uint8_t *image
= mlt_properties_get_data( a_props
, "image", NULL
);
881 int width
= mlt_properties_get_int( a_props
, "width" );
882 int height
= mlt_properties_get_int( a_props
, "height" );
883 int format
= mlt_properties_get_int( a_props
, "format" );
885 // Pointers for copy operation
897 // Will need to know region to copy
898 struct geometry_s result
;
900 // Calculate the region now
901 composite_calculate( this, &result
, a_frame
, position
);
903 // Need to scale down to actual dimensions
904 x
= rint( 0.5 + result
.item
.x
* width
/ result
.nw
);
905 y
= rint( 0.5 + result
.item
.y
* height
/ result
.nh
);
906 w
= rint( 0.5 + result
.item
.w
* width
/ result
.nw
);
907 h
= rint( 0.5 + result
.item
.h
* height
/ result
.nh
);
916 sprintf( key
, "%s.in=%d,%d,%d,%d,%f,%d,%d", name
, x
, y
, w
, h
, result
.item
.mix
, width
, height
);
917 mlt_properties_parse( a_props
, key
);
918 sprintf( key
, "%s.out=%d,%d,%d,%d,%f,%d,%d", name
, x
, y
, w
, h
, result
.item
.mix
, width
, height
);
919 mlt_properties_parse( a_props
, key
);
924 // Now we need to create a new destination image
925 dest
= mlt_pool_alloc( w
* h
* 2 );
927 // Assign to the new frame
928 mlt_properties_set_data( b_props
, "image", dest
, w
* h
* 2, mlt_pool_release
, NULL
);
929 mlt_properties_set_int( b_props
, "width", w
);
930 mlt_properties_set_int( b_props
, "height", h
);
931 mlt_properties_set_int( b_props
, "format", format
);
940 if ( y
+ h
> height
)
941 h
-= ( y
+ h
- height
);
950 if ( w
> 0 && h
> 0 )
952 // Copy the region of the image
953 p
= image
+ y
* ss
+ x
* 2;
957 memcpy( dest
, p
, w
* 2 );
963 // Assign this position to the b frame
964 mlt_frame_set_position( b_frame
, frame_position
);
965 mlt_properties_set_int( b_props
, "distort", 1 );
974 static int transition_get_image( mlt_frame a_frame
, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
976 // Get the b frame from the stack
977 mlt_frame b_frame
= mlt_frame_pop_frame( a_frame
);
979 // Get the transition from the a frame
980 mlt_transition
this = mlt_frame_pop_service( a_frame
);
983 double position
= mlt_deque_pop_back_double( MLT_FRAME_IMAGE_STACK( a_frame
) );
984 int out
= mlt_frame_pop_service_int( a_frame
);
985 int in
= mlt_frame_pop_service_int( a_frame
);
987 // Get the properties from the transition
988 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
990 // TODO: clean up always_active behaviour
991 if ( mlt_properties_get_int( properties
, "always_active" ) )
993 mlt_events_block( properties
, properties
);
994 mlt_properties_set_int( properties
, "in", in
);
995 mlt_properties_set_int( properties
, "out", out
);
996 mlt_events_unblock( properties
, properties
);
999 // This compositer is yuv422 only
1000 *format
= mlt_image_yuv422
;
1002 if ( b_frame
!= NULL
)
1004 // Get the properties of the a frame
1005 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
1007 // Get the properties of the b frame
1008 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
1010 // Structures for geometry
1011 struct geometry_s result
;
1013 // Calculate the position
1014 double delta
= delta_calculate( this, a_frame
, position
);
1016 // Get the image from the b frame
1017 uint8_t *image_b
= NULL
;
1018 int width_b
= *width
;
1019 int height_b
= *height
;
1022 uint8_t *alpha_a
= NULL
;
1023 uint8_t *alpha_b
= NULL
;
1025 // Composites always need scaling... defaulting to lowest
1026 char *rescale
= mlt_properties_get( a_props
, "rescale.interp" );
1027 if ( rescale
== NULL
|| !strcmp( rescale
, "none" ) )
1028 rescale
= "nearest";
1029 mlt_properties_set( a_props
, "rescale.interp", rescale
);
1030 mlt_properties_set( b_props
, "rescale.interp", rescale
);
1032 // Do the calculation
1033 // NB: Locks needed here since the properties are being modified
1034 mlt_service_lock( MLT_TRANSITION_SERVICE( this ) );
1035 composite_calculate( this, &result
, a_frame
, position
);
1036 mlt_service_unlock( MLT_TRANSITION_SERVICE( this ) );
1038 // Since we are the consumer of the b_frame, we must pass along these
1039 // consumer properties from the a_frame
1040 mlt_properties_set_double( b_props
, "consumer_deinterlace", mlt_properties_get_double( a_props
, "consumer_deinterlace" ) );
1041 mlt_properties_set( b_props
, "consumer_deinterlace_method", mlt_properties_get( a_props
, "consumer_deinterlace_method" ) );
1042 mlt_properties_set_double( b_props
, "consumer_aspect_ratio", mlt_properties_get_double( a_props
, "consumer_aspect_ratio" ) );
1044 // TODO: Dangerous/temporary optimisation - if nothing to do, then do nothing
1045 if ( mlt_properties_get_int( properties
, "no_alpha" ) &&
1046 result
.item
.x
== 0 && result
.item
.y
== 0 && result
.item
.w
== *width
&& result
.item
.h
== *height
&& result
.item
.mix
== 100 )
1048 mlt_frame_get_image( b_frame
, image
, format
, width
, height
, 1 );
1049 if ( !mlt_frame_is_test_card( a_frame
) )
1050 mlt_frame_replace_image( a_frame
, *image
, *format
, *width
, *height
);
1054 if ( a_frame
== b_frame
)
1056 double aspect_ratio
= mlt_frame_get_aspect_ratio( b_frame
);
1057 get_b_frame_image( this, b_frame
, &image_b
, &width_b
, &height_b
, &result
);
1058 alpha_b
= mlt_frame_get_alpha_mask( b_frame
);
1059 mlt_properties_set_double( a_props
, "aspect_ratio", aspect_ratio
);
1062 // Get the image from the a frame
1063 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, 1 );
1064 alpha_a
= mlt_frame_get_alpha_mask( a_frame
);
1066 // Optimisation - no compositing required
1067 if ( result
.item
.mix
== 0 || ( result
.item
.w
== 0 && result
.item
.h
== 0 ) )
1070 // Need to keep the width/height of the a_frame on the b_frame for titling
1071 if ( mlt_properties_get( a_props
, "dest_width" ) == NULL
)
1073 mlt_properties_set_int( a_props
, "dest_width", *width
);
1074 mlt_properties_set_int( a_props
, "dest_height", *height
);
1075 mlt_properties_set_int( b_props
, "dest_width", *width
);
1076 mlt_properties_set_int( b_props
, "dest_height", *height
);
1080 mlt_properties_set_int( b_props
, "dest_width", mlt_properties_get_int( a_props
, "dest_width" ) );
1081 mlt_properties_set_int( b_props
, "dest_height", mlt_properties_get_int( a_props
, "dest_height" ) );
1084 // Special case for titling...
1085 if ( mlt_properties_get_int( properties
, "titles" ) )
1087 if ( mlt_properties_get( b_props
, "rescale.interp" ) == NULL
)
1088 mlt_properties_set( b_props
, "rescale.interp", "hyper" );
1089 width_b
= mlt_properties_get_int( a_props
, "dest_width" );
1090 height_b
= mlt_properties_get_int( a_props
, "dest_height" );
1093 if ( *image
!= image_b
&& ( image_b
!= NULL
|| get_b_frame_image( this, b_frame
, &image_b
, &width_b
, &height_b
, &result
) == 0 ) )
1095 uint8_t *dest
= *image
;
1096 uint8_t *src
= image_b
;
1098 mlt_properties_get_int( a_props
, "consumer_deinterlace" ) ||
1099 mlt_properties_get_int( properties
, "progressive" );
1102 int32_t luma_softness
= mlt_properties_get_double( properties
, "softness" ) * ( 1 << 16 );
1103 uint16_t *luma_bitmap
= get_luma( this, properties
, width_b
, height_b
);
1104 char *operator = mlt_properties_get( properties
, "operator" );
1106 alpha_b
= alpha_b
== NULL ?
mlt_frame_get_alpha_mask( b_frame
) : alpha_b
;
1108 composite_line_fn line_fn
= composite_line_yuv
;
1110 // Replacement and override
1111 if ( operator != NULL
)
1113 if ( !strcmp( operator, "or" ) )
1114 line_fn
= composite_line_yuv_or
;
1115 if ( !strcmp( operator, "and" ) )
1116 line_fn
= composite_line_yuv_and
;
1117 if ( !strcmp( operator, "xor" ) )
1118 line_fn
= composite_line_yuv_xor
;
1121 // Allow the user to completely obliterate the alpha channels from both frames
1122 if ( mlt_properties_get( properties
, "alpha_a" ) )
1123 memset( alpha_a
, mlt_properties_get_int( properties
, "alpha_a" ), *width
* *height
);
1125 if ( mlt_properties_get( properties
, "alpha_b" ) )
1126 memset( alpha_b
, mlt_properties_get_int( properties
, "alpha_b" ), width_b
* height_b
);
1128 for ( field
= 0; field
< ( progressive ?
1 : 2 ); field
++ )
1130 // Assume lower field (0) first
1131 double field_position
= position
+ field
* delta
;
1133 // Do the calculation if we need to
1134 // NB: Locks needed here since the properties are being modified
1135 mlt_service_lock( MLT_TRANSITION_SERVICE( this ) );
1136 composite_calculate( this, &result
, a_frame
, field_position
);
1137 mlt_service_unlock( MLT_TRANSITION_SERVICE( this ) );
1139 if ( mlt_properties_get_int( properties
, "titles" ) )
1141 result
.item
.w
= rint( 0.5 + *width
* ( result
.item
.w
/ result
.nw
) );
1142 result
.nw
= result
.item
.w
;
1143 result
.item
.h
= rint( 0.5 + *height
* ( result
.item
.h
/ result
.nh
) );
1144 result
.nh
= *height
;
1145 result
.sw
= width_b
;
1146 result
.sh
= height_b
;
1150 alignment_calculate( &result
);
1152 // Composite the b_frame on the a_frame
1153 composite_yuv( dest
, *width
, *height
, src
, width_b
, height_b
, alpha_b
, alpha_a
, result
, progressive ?
-1 : field
, luma_bitmap
, luma_softness
, line_fn
);
1159 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, 1 );
1165 /** Composition transition processing.
1168 static mlt_frame
composite_process( mlt_transition
this, mlt_frame a_frame
, mlt_frame b_frame
)
1170 // UGH - this is a TODO - find a more reliable means of obtaining in/out for the always_active case
1171 if ( mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "always_active" ) == 0 )
1173 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "in" ) );
1174 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "out" ) );
1175 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame
), position_calculate( this, mlt_frame_get_position( a_frame
) ) );
1179 mlt_properties props
= mlt_properties_get_data( MLT_FRAME_PROPERTIES( b_frame
), "_producer", NULL
);
1180 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( props
, "in" ) );
1181 mlt_frame_push_service_int( a_frame
, mlt_properties_get_int( props
, "out" ) );
1182 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame
), mlt_properties_get_int( props
, "_frame" ) - mlt_properties_get_int( props
, "in" ) );
1185 mlt_frame_push_service( a_frame
, this );
1186 mlt_frame_push_frame( a_frame
, b_frame
);
1187 mlt_frame_push_get_image( a_frame
, transition_get_image
);
1191 /** Constructor for the filter.
1194 mlt_transition
transition_composite_init( mlt_profile profile
, mlt_service_type type
, const char *id
, char *arg
)
1196 mlt_transition
this = calloc( sizeof( struct mlt_transition_s
), 1 );
1197 if ( this != NULL
&& mlt_transition_init( this, NULL
) == 0 )
1199 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
1201 this->process
= composite_process
;
1203 // Default starting motion and zoom
1204 mlt_properties_set( properties
, "start", arg
!= NULL ? arg
: "0,0:100%x100%" );
1207 mlt_properties_set( properties
, "factory", "fezzik" );
1209 // Use alignment (and hence alpha of b frame)
1210 mlt_properties_set_int( properties
, "aligned", 1 );
1212 // Inform apps and framework that this is a video only transition
1213 mlt_properties_set_int( properties
, "_transition_type", 1 );