2 * transition_composite.c -- compose one image over another using alpha channel
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Dan Dennedy <dan@dennedy.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #include "transition_composite.h"
22 #include <framework/mlt.h>
30 typedef void ( *composite_line_fn
)( uint8_t *dest
, uint8_t *src
, int width_src
, uint8_t *alpha
, int weight
, uint16_t *luma
, int softness
);
32 /* mmx function declarations */
34 void composite_line_yuv_mmx( uint8_t *dest
, uint8_t *src
, int width_src
, uint8_t *alpha
, int weight
, uint16_t *luma
, int softness
);
35 int composite_have_mmx( void );
43 struct mlt_geometry_item_s item
;
44 int nw
; // normalised width
45 int nh
; // normalised height
46 int sw
; // scaled width, not including consumer scale based upon w/nw
47 int sh
; // scaled height, not including consumer scale based upon h/nh
48 int halign
; // horizontal alignment: 0=left, 1=center, 2=right
49 int valign
; // vertical alignment: 0=top, 1=middle, 2=bottom
52 /** Parse the alignment properties into the geometry.
55 static int alignment_parse( char* align
)
60 else if ( isdigit( align
[ 0 ] ) )
62 else if ( align
[ 0 ] == 'c' || align
[ 0 ] == 'm' )
64 else if ( align
[ 0 ] == 'r' || align
[ 0 ] == 'b' )
70 /** Calculate real geometry.
73 static void geometry_calculate( mlt_transition
this, struct geometry_s
*output
, float position
)
75 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
76 mlt_geometry geometry
= mlt_properties_get_data( properties
, "geometries", NULL
);
77 int length
= mlt_geometry_get_length( geometry
);
80 if ( position
>= length
&& length
!= 0 )
82 int section
= position
/ length
;
83 position
-= section
* length
;
84 if ( section
% 2 == 1 )
85 position
= length
- position
;
88 // Fetch the key for the position
89 mlt_geometry_fetch( geometry
, &output
->item
, position
);
92 static mlt_geometry
transition_parse_keys( mlt_transition
this, int normalised_width
, int normalised_height
)
94 // Loop variable for property interrogation
97 // Get the properties of the transition
98 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
100 // Create an empty geometries object
101 mlt_geometry geometry
= mlt_geometry_init( );
103 // Get the in and out position
104 mlt_position in
= mlt_transition_get_in( this );
105 mlt_position out
= mlt_transition_get_out( this );
107 // Get the new style geometry string
108 char *property
= mlt_properties_get( properties
, "geometry" );
110 // Parse the geometry if we have one
111 mlt_geometry_parse( geometry
, property
, out
- in
+ 1, normalised_width
, normalised_height
);
113 // Check if we're using the old style geometry
114 if ( property
== NULL
)
116 // DEPRECATED: Multiple keys for geometry information is inefficient and too rigid for
117 // practical use - while deprecated, it has been slightly extended too - keys can now
118 // be specified out of order, and can be blanked or NULL to simulate removal
120 // Structure to use for parsing and inserting
121 struct mlt_geometry_item_s item
;
123 // Parse the start property
125 if ( mlt_geometry_parse_item( geometry
, &item
, mlt_properties_get( properties
, "start" ) ) == 0 )
126 mlt_geometry_insert( geometry
, &item
);
128 // Parse the keys in between
129 for ( i
= 0; i
< mlt_properties_count( properties
); i
++ )
131 // Get the name of the property
132 char *name
= mlt_properties_get_name( properties
, i
);
134 // Check that it's valid
135 if ( !strncmp( name
, "key[", 4 ) )
137 // Get the value of the property
138 char *value
= mlt_properties_get_value( properties
, i
);
140 // Determine the frame number
141 item
.frame
= atoi( name
+ 4 );
143 // Parse and add to the list
144 if ( mlt_geometry_parse_item( geometry
, &item
, value
) == 0 )
145 mlt_geometry_insert( geometry
, &item
);
147 fprintf( stderr
, "Invalid Key - skipping %s = %s\n", name
, value
);
153 if ( mlt_geometry_parse_item( geometry
, &item
, mlt_properties_get( properties
, "end" ) ) == 0 )
154 mlt_geometry_insert( geometry
, &item
);
160 /** Adjust position according to scaled size and alignment properties.
163 static void alignment_calculate( struct geometry_s
*geometry
)
165 geometry
->item
.x
+= ( geometry
->item
.w
- geometry
->sw
) * geometry
->halign
/ 2;
166 geometry
->item
.y
+= ( geometry
->item
.h
- geometry
->sh
) * geometry
->valign
/ 2;
169 /** Calculate the position for this frame.
172 static int position_calculate( mlt_transition
this, mlt_position position
)
174 // Get the in and out position
175 mlt_position in
= mlt_transition_get_in( this );
178 return position
- in
;
181 /** Calculate the field delta for this frame - position between two frames.
184 static inline float delta_calculate( mlt_transition
this, mlt_frame frame
)
186 // Get the in and out position
187 mlt_position in
= mlt_transition_get_in( this );
188 mlt_position out
= mlt_transition_get_out( this );
189 float length
= out
- in
+ 1;
191 // Get the position of the frame
192 char *name
= mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
193 mlt_position position
= mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame
), name
);
196 float x
= ( float )( position
- in
) / length
;
197 float y
= ( float )( 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
370 /** Composite a source line over a destination line
374 void composite_line_yuv( uint8_t *dest
, uint8_t *src
, int width_src
, uint8_t *alpha
, int weight
, uint16_t *luma
, int softness
)
379 for ( j
= 0; j
< width_src
; j
++ )
381 a
= ( alpha
== NULL
) ?
255 : *alpha
++;
382 mix
= ( luma
== NULL
) ? weight
: linearstep( luma
[ j
], luma
[ j
] + softness
, weight
);
383 mix
= ( mix
* ( a
+ 1 ) ) >> 8;
384 *dest
= ( *src
++ * mix
+ *dest
* ( ( 1 << 16 ) - mix
) ) >> 16;
386 *dest
= ( *src
++ * mix
+ *dest
* ( ( 1 << 16 ) - mix
) ) >> 16;
391 /** Composite function.
394 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 *p_alpha
, struct geometry_s geometry
, int field
, uint16_t *p_luma
, int32_t softness
, composite_line_fn line_fn
)
398 int x_src
= 0, y_src
= 0;
399 int32_t weight
= ( 1 << 16 ) * ( geometry
.item
.mix
/ 100 );
400 int step
= ( field
> -1 ) ?
2 : 1;
402 int stride_src
= width_src
* bpp
;
403 int stride_dest
= width_dest
* bpp
;
405 // Adjust to consumer scale
406 int x
= rint( 0.5 + geometry
.item
.x
* width_dest
/ geometry
.nw
);
407 int y
= rint( 0.5 + geometry
.item
.y
* height_dest
/ geometry
.nh
);
408 int x_uneven
= x
& 1;
410 // optimization points - no work to do
411 if ( width_src
<= 0 || height_src
<= 0 )
414 if ( ( x
< 0 && -x
>= width_src
) || ( y
< 0 && -y
>= height_src
) )
417 // crop overlay off the left edge of frame
425 // crop overlay beyond right edge of frame
426 if ( x
+ width_src
> width_dest
)
427 width_src
= width_dest
- x
;
429 // crop overlay off the top edge of the frame
437 // crop overlay below bottom edge of frame
438 if ( y
+ height_src
> height_dest
)
439 height_src
= height_dest
- y
;
441 // offset pointer into overlay buffer based on cropping
442 p_src
+= x_src
* bpp
+ y_src
* stride_src
;
444 // offset pointer into frame buffer based upon positive coordinates only!
445 p_dest
+= ( x
< 0 ?
0 : x
) * bpp
+ ( y
< 0 ?
0 : y
) * stride_dest
;
447 // offset pointer into alpha channel based upon cropping
449 p_alpha
+= x_src
+ y_src
* stride_src
/ bpp
;
451 // offset pointer into luma channel based upon cropping
453 p_luma
+= x_src
+ y_src
* stride_src
/ bpp
;
455 // Assuming lower field first
456 // Special care is taken to make sure the b_frame is aligned to the correct field.
457 // field 0 = lower field and y should be odd (y is 0-based).
458 // field 1 = upper field and y should be even.
459 if ( ( field
> -1 ) && ( y
% 2 == field
) )
461 //fprintf( stderr, "field %d y %d\n", field, y );
462 if ( ( field
== 1 && y
< height_dest
- 1 ) || ( field
== 0 && y
== 0 ) )
463 p_dest
+= stride_dest
;
465 p_dest
-= stride_dest
;
468 // On the second field, use the other lines from b_frame
473 p_alpha
+= stride_src
/ bpp
;
479 int alpha_stride
= stride_src
/ bpp
;
481 // Make sure than x and w are even
488 // now do the compositing only to cropped extents
489 if ( line_fn
!= NULL
)
491 for ( i
= 0; i
< height_src
; i
+= step
)
493 line_fn( p_dest
, p_src
, width_src
, p_alpha
, weight
, p_luma
, softness
);
496 p_dest
+= stride_dest
;
498 p_alpha
+= alpha_stride
;
500 p_luma
+= alpha_stride
;
505 for ( i
= 0; i
< height_src
; i
+= step
)
507 composite_line_yuv( p_dest
, p_src
, width_src
, p_alpha
, weight
, p_luma
, softness
);
510 p_dest
+= stride_dest
;
512 p_alpha
+= alpha_stride
;
514 p_luma
+= alpha_stride
;
522 /** Scale 16bit greyscale luma map using nearest neighbor.
526 scale_luma ( uint16_t *dest_buf
, int dest_width
, int dest_height
, const uint16_t *src_buf
, int src_width
, int src_height
)
529 register int x_step
= ( src_width
<< 16 ) / dest_width
;
530 register int y_step
= ( src_height
<< 16 ) / dest_height
;
531 register int x
, y
= 0;
533 for ( i
= 0; i
< dest_height
; i
++ )
535 const uint16_t *src
= src_buf
+ ( y
>> 16 ) * src_width
;
538 for ( j
= 0; j
< dest_width
; j
++ )
540 *dest_buf
++ = src
[ x
>> 16 ];
547 static uint16_t* get_luma( mlt_properties properties
, int width
, int height
)
549 // The cached luma map information
550 int luma_width
= mlt_properties_get_int( properties
, "_luma.width" );
551 int luma_height
= mlt_properties_get_int( properties
, "_luma.height" );
552 uint16_t *luma_bitmap
= mlt_properties_get_data( properties
, "_luma.bitmap", NULL
);
554 // If the filename property changed, reload the map
555 char *resource
= mlt_properties_get( properties
, "luma" );
559 if ( resource
!= NULL
&& strchr( resource
, '%' ) )
561 sprintf( temp
, "%s/lumas/%s/%s", mlt_factory_prefix( ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource
, '%' ) + 1 );
565 if ( resource
!= NULL
&& ( luma_bitmap
== NULL
|| luma_width
!= width
|| luma_height
!= height
) )
567 uint16_t *orig_bitmap
= mlt_properties_get_data( properties
, "_luma.orig_bitmap", NULL
);
568 luma_width
= mlt_properties_get_int( properties
, "_luma.orig_width" );
569 luma_height
= mlt_properties_get_int( properties
, "_luma.orig_height" );
571 // Load the original luma once
572 if ( orig_bitmap
== NULL
)
574 char *extension
= extension
= strrchr( resource
, '.' );
576 // See if it is a PGM
577 if ( extension
!= NULL
&& strcmp( extension
, ".pgm" ) == 0 )
580 FILE *f
= fopen( resource
, "r" );
584 luma_read_pgm( f
, &orig_bitmap
, &luma_width
, &luma_height
);
587 // Remember the original size for subsequent scaling
588 mlt_properties_set_data( properties
, "_luma.orig_bitmap", orig_bitmap
, luma_width
* luma_height
* 2, mlt_pool_release
, NULL
);
589 mlt_properties_set_int( properties
, "_luma.orig_width", luma_width
);
590 mlt_properties_set_int( properties
, "_luma.orig_height", luma_height
);
595 // Get the factory producer service
596 char *factory
= mlt_properties_get( properties
, "factory" );
598 // Create the producer
599 mlt_producer producer
= mlt_factory_producer( factory
, resource
);
602 if ( producer
!= NULL
)
604 // Get the producer properties
605 mlt_properties producer_properties
= MLT_PRODUCER_PROPERTIES( producer
);
607 // Ensure that we loop
608 mlt_properties_set( producer_properties
, "eof", "loop" );
610 // Now pass all producer. properties on the transition down
611 mlt_properties_pass( producer_properties
, properties
, "luma." );
613 // We will get the alpha frame from the producer
614 mlt_frame luma_frame
= NULL
;
616 // Get the luma frame
617 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer
), &luma_frame
, 0 ) == 0 )
620 mlt_image_format luma_format
= mlt_image_yuv422
;
622 // Get image from the luma producer
623 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame
), "rescale.interp", "none" );
624 mlt_frame_get_image( luma_frame
, &luma_image
, &luma_format
, &luma_width
, &luma_height
, 0 );
626 // Generate the luma map
627 if ( luma_image
!= NULL
&& luma_format
== mlt_image_yuv422
)
628 luma_read_yuv422( luma_image
, &orig_bitmap
, luma_width
, luma_height
);
630 // Remember the original size for subsequent scaling
631 mlt_properties_set_data( properties
, "_luma.orig_bitmap", orig_bitmap
, luma_width
* luma_height
* 2, mlt_pool_release
, NULL
);
632 mlt_properties_set_int( properties
, "_luma.orig_width", luma_width
);
633 mlt_properties_set_int( properties
, "_luma.orig_height", luma_height
);
635 // Cleanup the luma frame
636 mlt_frame_close( luma_frame
);
639 // Cleanup the luma producer
640 mlt_producer_close( producer
);
645 luma_bitmap
= mlt_pool_alloc( width
* height
* sizeof( uint16_t ) );
646 scale_luma( luma_bitmap
, width
, height
, orig_bitmap
, luma_width
, luma_height
);
648 // Remember the scaled luma size to prevent unnecessary scaling
649 mlt_properties_set_int( properties
, "_luma.width", width
);
650 mlt_properties_set_int( properties
, "_luma.height", height
);
651 mlt_properties_set_data( properties
, "_luma.bitmap", luma_bitmap
, width
* height
* 2, mlt_pool_release
, NULL
);
656 /** Get the properly sized image from b_frame.
659 static int get_b_frame_image( mlt_transition
this, mlt_frame b_frame
, uint8_t **image
, int *width
, int *height
, struct geometry_s
*geometry
)
662 mlt_image_format format
= mlt_image_yuv422
;
664 // Get the properties objects
665 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
666 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
668 if ( mlt_properties_get_int( properties
, "distort" ) == 0 && mlt_properties_get_int( b_props
, "distort" ) == 0 && geometry
->item
.distort
== 0 )
670 // Adjust b_frame pixel aspect
671 int normalised_width
= geometry
->item
.w
;
672 int normalised_height
= geometry
->item
.h
;
673 int real_width
= get_value( b_props
, "real_width", "width" );
674 int real_height
= get_value( b_props
, "real_height", "height" );
675 double input_ar
= mlt_frame_get_aspect_ratio( b_frame
);
676 double output_ar
= mlt_properties_get_double( b_props
, "consumer_aspect_ratio" );
677 int scaled_width
= input_ar
/ output_ar
* real_width
;
678 int scaled_height
= real_height
;
680 // Now ensure that our images fit in the normalised frame
681 if ( scaled_width
> normalised_width
)
683 scaled_height
= scaled_height
* normalised_width
/ scaled_width
;
684 scaled_width
= normalised_width
;
686 if ( scaled_height
> normalised_height
)
688 scaled_width
= scaled_width
* normalised_height
/ scaled_height
;
689 scaled_height
= normalised_height
;
692 if ( mlt_properties_get_int( properties
, "fill" ) )
694 if ( scaled_height
< normalised_height
&& scaled_width
* normalised_height
/ scaled_height
< normalised_width
)
696 scaled_width
= scaled_width
* normalised_height
/ scaled_height
;
697 scaled_height
= normalised_height
;
699 else if ( scaled_width
< normalised_width
&& scaled_height
* normalised_width
/ scaled_width
< normalised_height
)
701 scaled_height
= scaled_height
* normalised_width
/ scaled_width
;
702 scaled_width
= normalised_width
;
706 // Save the new scaled dimensions
707 geometry
->sw
= scaled_width
;
708 geometry
->sh
= scaled_height
;
712 geometry
->sw
= geometry
->item
.w
;
713 geometry
->sh
= geometry
->item
.h
;
716 // We want to ensure that we bypass resize now...
717 mlt_properties_set_int( b_props
, "distort", 1 );
719 // Take into consideration alignment for optimisation
720 if ( !mlt_properties_get_int( properties
, "titles" ) )
721 alignment_calculate( geometry
);
723 // Adjust to consumer scale
724 int x
= geometry
->item
.x
* *width
/ geometry
->nw
;
725 int y
= geometry
->item
.y
* *height
/ geometry
->nh
;
726 *width
= geometry
->sw
* *width
/ geometry
->nw
;
727 *height
= geometry
->sh
* *height
/ geometry
->nh
;
731 // optimization points - no work to do
732 if ( *width
< 1 || *height
< 1 )
735 if ( ( x
< 0 && -x
>= *width
) || ( y
< 0 && -y
>= *height
) )
738 ret
= mlt_frame_get_image( b_frame
, image
, &format
, width
, height
, 1 );
744 static mlt_geometry
composite_calculate( mlt_transition
this, struct geometry_s
*result
, mlt_frame a_frame
, float position
)
746 // Get the properties from the transition
747 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
749 // Get the properties from the frame
750 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
752 // Structures for geometry
753 mlt_geometry start
= mlt_properties_get_data( properties
, "geometries", NULL
);
755 // Obtain the normalised width and height from the a_frame
756 int normalised_width
= mlt_properties_get_int( a_props
, "normalised_width" );
757 int normalised_height
= mlt_properties_get_int( a_props
, "normalised_height" );
759 // Now parse the geometries
762 // Parse the transitions properties
763 start
= transition_parse_keys( this, normalised_width
, normalised_height
);
765 // Assign to properties to ensure we get destroyed
766 mlt_properties_set_data( properties
, "geometries", start
, 0, ( mlt_destructor
)mlt_geometry_close
, NULL
);
770 int length
= mlt_transition_get_out( this ) - mlt_transition_get_in( this ) + 1;
771 mlt_geometry_refresh( start
, mlt_properties_get( properties
, "geometry" ), length
, normalised_width
, normalised_height
);
774 // Do the calculation
775 geometry_calculate( this, result
, position
);
777 // Assign normalised info
778 result
->nw
= normalised_width
;
779 result
->nh
= normalised_height
;
781 // Now parse the alignment
782 result
->halign
= alignment_parse( mlt_properties_get( properties
, "halign" ) );
783 result
->valign
= alignment_parse( mlt_properties_get( properties
, "valign" ) );
788 static inline void inline_memcpy( uint8_t *dest
, uint8_t *src
, int length
)
790 uint8_t *end
= src
+ length
;
798 mlt_frame
composite_copy_region( mlt_transition
this, mlt_frame a_frame
, mlt_position frame_position
)
800 // Create a frame to return
801 mlt_frame b_frame
= mlt_frame_init( );
803 // Get the properties of the a frame
804 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
806 // Get the properties of the b frame
807 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
810 int position
= position_calculate( this, frame_position
);
813 uint8_t *dest
= NULL
;
815 // Get the image and dimensions
816 uint8_t *image
= mlt_properties_get_data( a_props
, "image", NULL
);
817 int width
= mlt_properties_get_int( a_props
, "width" );
818 int height
= mlt_properties_get_int( a_props
, "height" );
820 // Pointers for copy operation
832 // Will need to know region to copy
833 struct geometry_s result
;
835 float delta
= delta_calculate( this, a_frame
);
837 // Calculate the region now
838 composite_calculate( this, &result
, a_frame
, position
+ delta
/ 2 );
840 // Need to scale down to actual dimensions
841 x
= rint( 0.5 + result
.item
.x
* width
/ result
.nw
);
842 y
= rint( 0.5 + result
.item
.y
* height
/ result
.nh
);
843 w
= rint( 0.5 + result
.item
.w
* width
/ result
.nw
);
844 h
= rint( 0.5 + result
.item
.h
* height
/ result
.nh
);
846 // Make sure that x and w are even
862 // Now we need to create a new destination image
863 dest
= mlt_pool_alloc( w
* h
* 2 );
865 // Assign to the new frame
866 mlt_properties_set_data( b_props
, "image", dest
, w
* h
* 2, mlt_pool_release
, NULL
);
867 mlt_properties_set_int( b_props
, "width", w
);
868 mlt_properties_set_int( b_props
, "height", h
);
877 if ( y
+ h
> height
)
878 h
-= ( y
+ h
- height
);
887 if ( w
> 0 && h
> 0 )
889 // Copy the region of the image
890 p
= image
+ y
* ss
+ x
* 2;
894 inline_memcpy( dest
, p
, w
* 2 );
900 // Assign this position to the b frame
901 mlt_frame_set_position( b_frame
, frame_position
);
902 mlt_properties_set_int( b_props
, "distort", 1 );
911 static int transition_get_image( mlt_frame a_frame
, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
913 // Get the b frame from the stack
914 mlt_frame b_frame
= mlt_frame_pop_frame( a_frame
);
916 // Get the transition from the a frame
917 mlt_transition
this = mlt_frame_pop_service( a_frame
);
919 // This compositer is yuv422 only
920 *format
= mlt_image_yuv422
;
922 // Get the image from the a frame
923 mlt_frame_get_image( a_frame
, image
, format
, width
, height
, 1 );
925 // Get the properties from the transition
926 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
928 if ( b_frame
!= NULL
)
930 // Get the properties of the a frame
931 mlt_properties a_props
= MLT_FRAME_PROPERTIES( a_frame
);
933 // Get the properties of the b frame
934 mlt_properties b_props
= MLT_FRAME_PROPERTIES( b_frame
);
936 // Structures for geometry
937 struct geometry_s result
;
939 // Calculate the position
940 float position
= mlt_properties_get_double( b_props
, "relative_position" );
941 float delta
= delta_calculate( this, a_frame
);
943 // Get the image from the b frame
944 uint8_t *image_b
= NULL
;
945 int width_b
= *width
;
946 int height_b
= *height
;
948 // Do the calculation
949 composite_calculate( this, &result
, a_frame
, position
);
951 // Optimisation - no compositing required
952 if ( result
.item
.mix
== 0 || ( result
.item
.w
== 0 && result
.item
.h
== 0 ) )
955 // Need to keep the width/height of the a_frame on the b_frame for titling
956 if ( mlt_properties_get( a_props
, "dest_width" ) == NULL
)
958 mlt_properties_set_int( a_props
, "dest_width", *width
);
959 mlt_properties_set_int( a_props
, "dest_height", *height
);
960 mlt_properties_set_int( b_props
, "dest_width", *width
);
961 mlt_properties_set_int( b_props
, "dest_height", *height
);
965 mlt_properties_set_int( b_props
, "dest_width", mlt_properties_get_int( a_props
, "dest_width" ) );
966 mlt_properties_set_int( b_props
, "dest_height", mlt_properties_get_int( a_props
, "dest_height" ) );
969 // Since we are the consumer of the b_frame, we must pass along these
970 // consumer properties from the a_frame
971 mlt_properties_set_double( b_props
, "consumer_deinterlace", mlt_properties_get_double( a_props
, "consumer_deinterlace" ) );
972 mlt_properties_set_double( b_props
, "consumer_aspect_ratio", mlt_properties_get_double( a_props
, "consumer_aspect_ratio" ) );
973 mlt_properties_set_int( b_props
, "normalised_width", mlt_properties_get_double( a_props
, "normalised_width" ) );
974 mlt_properties_set_int( b_props
, "normalised_height", mlt_properties_get_double( a_props
, "normalised_height" ) );
976 // Special case for titling...
977 if ( mlt_properties_get_int( properties
, "titles" ) )
979 if ( mlt_properties_get( b_props
, "rescale.interp" ) == NULL
)
980 mlt_properties_set( b_props
, "rescale.interp", "hyper" );
981 width_b
= mlt_properties_get_int( a_props
, "dest_width" );
982 height_b
= mlt_properties_get_int( a_props
, "dest_height" );
985 if ( get_b_frame_image( this, b_frame
, &image_b
, &width_b
, &height_b
, &result
) == 0 )
987 uint8_t *dest
= *image
;
988 uint8_t *src
= image_b
;
989 uint8_t *alpha
= mlt_frame_get_alpha_mask( b_frame
);
991 mlt_properties_get_int( a_props
, "consumer_deinterlace" ) ||
992 mlt_properties_get_int( properties
, "progressive" );
995 int32_t luma_softness
= mlt_properties_get_double( properties
, "softness" ) * ( 1 << 16 );
996 uint16_t *luma_bitmap
= get_luma( properties
, width_b
, height_b
);
997 //composite_line_fn line_fn = mlt_properties_get_int( properties, "_MMX" ) ? composite_line_yuv_mmx : NULL;
998 composite_line_fn line_fn
= NULL
;
1000 for ( field
= 0; field
< ( progressive ?
1 : 2 ); field
++ )
1002 // Assume lower field (0) first
1003 float field_position
= position
+ field
* delta
;
1005 // Do the calculation if we need to
1006 composite_calculate( this, &result
, a_frame
, field_position
);
1008 if ( mlt_properties_get_int( properties
, "titles" ) )
1010 result
.nw
= result
.item
.w
= *width
;
1011 result
.nh
= result
.item
.h
= *height
;
1012 result
.sw
= width_b
;
1013 result
.sh
= height_b
;
1017 alignment_calculate( &result
);
1019 // Composite the b_frame on the a_frame
1020 composite_yuv( dest
, *width
, *height
, src
, width_b
, height_b
, alpha
, result
, progressive ?
-1 : field
, luma_bitmap
, luma_softness
, line_fn
);
1028 /** Composition transition processing.
1031 static mlt_frame
composite_process( mlt_transition
this, mlt_frame a_frame
, mlt_frame b_frame
)
1033 // Get a unique name to store the frame position
1034 char *name
= mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
1036 // Assign the current position to the name
1037 mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame
), name
, mlt_frame_get_position( a_frame
) );
1039 // Propogate the transition properties to the b frame
1040 mlt_properties_set_double( MLT_FRAME_PROPERTIES( b_frame
), "relative_position", position_calculate( this, mlt_frame_get_position( a_frame
) ) );
1042 mlt_frame_push_service( a_frame
, this );
1043 mlt_frame_push_frame( a_frame
, b_frame
);
1044 mlt_frame_push_get_image( a_frame
, transition_get_image
);
1048 /** Constructor for the filter.
1051 mlt_transition
transition_composite_init( char *arg
)
1053 mlt_transition
this = calloc( sizeof( struct mlt_transition_s
), 1 );
1054 if ( this != NULL
&& mlt_transition_init( this, NULL
) == 0 )
1056 mlt_properties properties
= MLT_TRANSITION_PROPERTIES( this );
1058 this->process
= composite_process
;
1060 // Default starting motion and zoom
1061 mlt_properties_set( properties
, "start", arg
!= NULL ? arg
: "85%,5%:10%x10%" );
1064 mlt_properties_set( properties
, "factory", "fezzik" );
1067 //mlt_properties_set_int( properties, "_MMX", composite_have_mmx() );