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 mirror_off = mlt_properties_get_int( properties, "mirror_off" );
78 int repeat_off = mlt_properties_get_int( properties, "repeat_off" );
79 int length = mlt_geometry_get_length( geometry );
82 if ( !repeat_off && position >= length && length != 0 )
84 int section = position / length;
85 position -= section * length;
86 if ( !mirror_off && section % 2 == 1 )
87 position = length - position;
90 // Fetch the key for the position
91 mlt_geometry_fetch( geometry, &output->item, position );
94 static mlt_geometry transition_parse_keys( mlt_transition this, int normalised_width, int normalised_height )
96 // Loop variable for property interrogation
99 // Get the properties of the transition
100 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
102 // Create an empty geometries object
103 mlt_geometry geometry = mlt_geometry_init( );
105 // Get the in and out position
106 mlt_position in = mlt_transition_get_in( this );
107 mlt_position out = mlt_transition_get_out( this );
108 int length = out - in + 1;
110 // Get the new style geometry string
111 char *property = mlt_properties_get( properties, "geometry" );
113 // Allow a geometry repeat cycle
114 if ( mlt_properties_get_int( properties, "cycle" ) )
115 length = mlt_properties_get_int( properties, "cycle" );
117 // Parse the geometry if we have one
118 mlt_geometry_parse( geometry, property, length, normalised_width, normalised_height );
120 // Check if we're using the old style geometry
121 if ( property == NULL )
123 // DEPRECATED: Multiple keys for geometry information is inefficient and too rigid for
124 // practical use - while deprecated, it has been slightly extended too - keys can now
125 // be specified out of order, and can be blanked or NULL to simulate removal
127 // Structure to use for parsing and inserting
128 struct mlt_geometry_item_s item;
130 // Parse the start property
132 if ( mlt_geometry_parse_item( geometry, &item, mlt_properties_get( properties, "start" ) ) == 0 )
133 mlt_geometry_insert( geometry, &item );
135 // Parse the keys in between
136 for ( i = 0; i < mlt_properties_count( properties ); i ++ )
138 // Get the name of the property
139 char *name = mlt_properties_get_name( properties, i );
141 // Check that it's valid
142 if ( !strncmp( name, "key[", 4 ) )
144 // Get the value of the property
145 char *value = mlt_properties_get_value( properties, i );
147 // Determine the frame number
148 item.frame = atoi( name + 4 );
150 // Parse and add to the list
151 if ( mlt_geometry_parse_item( geometry, &item, value ) == 0 )
152 mlt_geometry_insert( geometry, &item );
154 fprintf( stderr, "Invalid Key - skipping %s = %s\n", name, value );
160 if ( mlt_geometry_parse_item( geometry, &item, mlt_properties_get( properties, "end" ) ) == 0 )
161 mlt_geometry_insert( geometry, &item );
167 /** Adjust position according to scaled size and alignment properties.
170 static void alignment_calculate( struct geometry_s *geometry )
172 geometry->item.x += ( geometry->item.w - geometry->sw ) * geometry->halign / 2;
173 geometry->item.y += ( geometry->item.h - geometry->sh ) * geometry->valign / 2;
176 /** Calculate the position for this frame.
179 static int position_calculate( mlt_transition this, mlt_position position )
181 // Get the in and out position
182 mlt_position in = mlt_transition_get_in( this );
185 return position - in;
188 /** Calculate the field delta for this frame - position between two frames.
191 static inline float delta_calculate( mlt_transition this, mlt_frame frame )
193 // Get the in and out position
194 mlt_position in = mlt_transition_get_in( this );
195 mlt_position out = mlt_transition_get_out( this );
196 float length = out - in + 1;
198 // Get the position of the frame
199 char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
200 mlt_position position = mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame ), name );
203 float x = ( float )( position - in ) / length;
204 float y = ( float )( position + 1 - in ) / length;
206 return length * ( y - x ) / 2.0;
209 static int get_value( mlt_properties properties, char *preferred, char *fallback )
211 int value = mlt_properties_get_int( properties, preferred );
213 value = mlt_properties_get_int( properties, fallback );
217 /** A linear threshold determination function.
220 static inline int32_t linearstep( int32_t edge1, int32_t edge2, int32_t a )
228 return ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
231 /** A smoother, non-linear threshold determination function.
234 static inline int32_t smoothstep( int32_t edge1, int32_t edge2, uint32_t a )
242 a = ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
244 return ( ( ( a * a ) >> 16 ) * ( ( 3 << 16 ) - ( 2 * a ) ) ) >> 16;
247 /** Load the luma map from PGM stream.
250 static void luma_read_pgm( FILE *f, uint16_t **map, int *width, int *height )
252 uint8_t *data = NULL;
264 // get the magic code
265 if ( fgets( line, 127, f ) == NULL )
269 while ( sscanf( line, " #%s", comment ) > 0 )
270 if ( fgets( line, 127, f ) == NULL )
273 if ( line[0] != 'P' || line[1] != '5' )
276 // skip white space and see if a new line must be fetched
277 for ( i = 2; i < 127 && line[i] != '\0' && isspace( line[i] ); i++ );
278 if ( ( line[i] == '\0' || line[i] == '#' ) && fgets( line, 127, f ) == NULL )
282 while ( sscanf( line, " #%s", comment ) > 0 )
283 if ( fgets( line, 127, f ) == NULL )
286 // get the dimensions
287 if ( line[0] == 'P' )
288 i = sscanf( line, "P5 %d %d %d", width, height, &maxval );
290 i = sscanf( line, "%d %d %d", width, height, &maxval );
292 // get the height value, if not yet
295 if ( fgets( line, 127, f ) == NULL )
299 while ( sscanf( line, " #%s", comment ) > 0 )
300 if ( fgets( line, 127, f ) == NULL )
303 i = sscanf( line, "%d", height );
310 // get the maximum gray value, if not yet
313 if ( fgets( line, 127, f ) == NULL )
317 while ( sscanf( line, " #%s", comment ) > 0 )
318 if ( fgets( line, 127, f ) == NULL )
321 i = sscanf( line, "%d", &maxval );
326 // determine if this is one or two bytes per pixel
327 bpp = maxval > 255 ? 2 : 1;
329 // allocate temporary storage for the raw data
330 data = mlt_pool_alloc( *width * *height * bpp );
335 if ( fread( data, *width * *height * bpp, 1, f ) != 1 )
338 // allocate the luma bitmap
339 *map = p = (uint16_t*)mlt_pool_alloc( *width * *height * sizeof( uint16_t ) );
343 // proces the raw data into the luma bitmap
344 for ( i = 0; i < *width * *height * bpp; i += bpp )
347 *p++ = data[ i ] << 8;
349 *p++ = ( data[ i ] << 8 ) + data[ i + 1 ];
356 mlt_pool_release( data );
359 /** Generate a luma map from any YUV image.
362 static void luma_read_yuv422( uint8_t *image, uint16_t **map, int width, int height )
366 // allocate the luma bitmap
367 uint16_t *p = *map = ( uint16_t* )mlt_pool_alloc( width * height * sizeof( uint16_t ) );
371 // proces the image data into the luma bitmap
372 for ( i = 0; i < width * height * 2; i += 2 )
373 *p++ = ( image[ i ] - 16 ) * 299; // 299 = 65535 / 219
377 /** Composite a source line over a destination line
381 void composite_line_yuv( uint8_t *dest, uint8_t *src, int width_src, uint8_t *alpha, int weight, uint16_t *luma, int softness )
386 for ( j = 0; j < width_src; j ++ )
388 a = ( alpha == NULL ) ? 255 : *alpha ++;
389 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
390 mix = ( mix * a ) >> 8;
391 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
393 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
398 /** Composite function.
401 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 )
405 int x_src = 0, y_src = 0;
406 int32_t weight = ( 1 << 16 ) * ( geometry.item.mix / 100 );
407 int step = ( field > -1 ) ? 2 : 1;
409 int stride_src = width_src * bpp;
410 int stride_dest = width_dest * bpp;
412 // Adjust to consumer scale
413 int x = rint( 0.5 + geometry.item.x * width_dest / geometry.nw );
414 int y = rint( 0.5 + geometry.item.y * height_dest / geometry.nh );
415 int x_uneven = x & 1;
417 // optimization points - no work to do
418 if ( width_src <= 0 || height_src <= 0 )
421 if ( ( x < 0 && -x >= width_src ) || ( y < 0 && -y >= height_src ) )
424 // crop overlay off the left edge of frame
432 // crop overlay beyond right edge of frame
433 if ( x + width_src > width_dest )
434 width_src = width_dest - x;
436 // crop overlay off the top edge of the frame
444 // crop overlay below bottom edge of frame
445 if ( y + height_src > height_dest )
446 height_src = height_dest - y;
448 // offset pointer into overlay buffer based on cropping
449 p_src += x_src * bpp + y_src * stride_src;
451 // offset pointer into frame buffer based upon positive coordinates only!
452 p_dest += ( x < 0 ? 0 : x ) * bpp + ( y < 0 ? 0 : y ) * stride_dest;
454 // offset pointer into alpha channel based upon cropping
456 p_alpha += x_src + y_src * stride_src / bpp;
458 // offset pointer into luma channel based upon cropping
460 p_luma += x_src + y_src * stride_src / bpp;
462 // Assuming lower field first
463 // Special care is taken to make sure the b_frame is aligned to the correct field.
464 // field 0 = lower field and y should be odd (y is 0-based).
465 // field 1 = upper field and y should be even.
466 if ( ( field > -1 ) && ( y % 2 == field ) )
468 if ( ( field == 1 && y < height_dest - 1 ) || ( field == 0 && y == 0 ) )
469 p_dest += stride_dest;
471 p_dest -= stride_dest;
474 // On the second field, use the other lines from b_frame
479 p_alpha += stride_src / bpp;
485 int alpha_stride = stride_src / bpp;
487 // Make sure than x and w are even
494 // now do the compositing only to cropped extents
495 if ( line_fn != NULL )
497 for ( i = 0; i < height_src; i += step )
499 line_fn( p_dest, p_src, width_src, p_alpha, weight, p_luma, softness );
502 p_dest += stride_dest;
504 p_alpha += alpha_stride;
506 p_luma += alpha_stride;
511 for ( i = 0; i < height_src; i += step )
513 composite_line_yuv( p_dest, p_src, width_src, p_alpha, weight, p_luma, softness );
516 p_dest += stride_dest;
518 p_alpha += alpha_stride;
520 p_luma += alpha_stride;
528 /** Scale 16bit greyscale luma map using nearest neighbor.
532 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 )
535 register int x_step = ( src_width << 16 ) / dest_width;
536 register int y_step = ( src_height << 16 ) / dest_height;
537 register int x, y = 0;
539 for ( i = 0; i < dest_height; i++ )
541 const uint16_t *src = src_buf + ( y >> 16 ) * src_width;
544 for ( j = 0; j < dest_width; j++ )
546 *dest_buf++ = src[ x >> 16 ] ^ invert;
553 static uint16_t* get_luma( mlt_properties properties, int width, int height )
555 // The cached luma map information
556 int luma_width = mlt_properties_get_int( properties, "_luma.width" );
557 int luma_height = mlt_properties_get_int( properties, "_luma.height" );
558 uint16_t *luma_bitmap = mlt_properties_get_data( properties, "_luma.bitmap", NULL );
559 int invert = mlt_properties_get_int( properties, "luma_invert" );
561 // If the filename property changed, reload the map
562 char *resource = mlt_properties_get( properties, "luma" );
566 if ( resource != NULL && strchr( resource, '%' ) )
568 sprintf( temp, "%s/lumas/%s/%s", mlt_factory_prefix( ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource, '%' ) + 1 );
572 if ( resource != NULL && ( luma_bitmap == NULL || luma_width != width || luma_height != height ) )
574 uint16_t *orig_bitmap = mlt_properties_get_data( properties, "_luma.orig_bitmap", NULL );
575 luma_width = mlt_properties_get_int( properties, "_luma.orig_width" );
576 luma_height = mlt_properties_get_int( properties, "_luma.orig_height" );
578 // Load the original luma once
579 if ( orig_bitmap == NULL )
581 char *extension = extension = strrchr( resource, '.' );
583 // See if it is a PGM
584 if ( extension != NULL && strcmp( extension, ".pgm" ) == 0 )
587 FILE *f = fopen( resource, "r" );
591 luma_read_pgm( f, &orig_bitmap, &luma_width, &luma_height );
594 // Remember the original size for subsequent scaling
595 mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
596 mlt_properties_set_int( properties, "_luma.orig_width", luma_width );
597 mlt_properties_set_int( properties, "_luma.orig_height", luma_height );
602 // Get the factory producer service
603 char *factory = mlt_properties_get( properties, "factory" );
605 // Create the producer
606 mlt_producer producer = mlt_factory_producer( factory, resource );
609 if ( producer != NULL )
611 // Get the producer properties
612 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
614 // Ensure that we loop
615 mlt_properties_set( producer_properties, "eof", "loop" );
617 // Now pass all producer. properties on the transition down
618 mlt_properties_pass( producer_properties, properties, "luma." );
620 // We will get the alpha frame from the producer
621 mlt_frame luma_frame = NULL;
623 // Get the luma frame
624 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &luma_frame, 0 ) == 0 )
627 mlt_image_format luma_format = mlt_image_yuv422;
629 // Get image from the luma producer
630 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame ), "rescale.interp", "none" );
631 mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 );
633 // Generate the luma map
634 if ( luma_image != NULL && luma_format == mlt_image_yuv422 )
635 luma_read_yuv422( luma_image, &orig_bitmap, luma_width, luma_height );
637 // Remember the original size for subsequent scaling
638 mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
639 mlt_properties_set_int( properties, "_luma.orig_width", luma_width );
640 mlt_properties_set_int( properties, "_luma.orig_height", luma_height );
642 // Cleanup the luma frame
643 mlt_frame_close( luma_frame );
646 // Cleanup the luma producer
647 mlt_producer_close( producer );
652 luma_bitmap = mlt_pool_alloc( width * height * sizeof( uint16_t ) );
653 scale_luma( luma_bitmap, width, height, orig_bitmap, luma_width, luma_height, invert * ( ( 1 << 16 ) - 1 ) );
655 // Remember the scaled luma size to prevent unnecessary scaling
656 mlt_properties_set_int( properties, "_luma.width", width );
657 mlt_properties_set_int( properties, "_luma.height", height );
658 mlt_properties_set_data( properties, "_luma.bitmap", luma_bitmap, width * height * 2, mlt_pool_release, NULL );
663 /** Get the properly sized image from b_frame.
666 static int get_b_frame_image( mlt_transition this, mlt_frame b_frame, uint8_t **image, int *width, int *height, struct geometry_s *geometry )
669 mlt_image_format format = mlt_image_yuv422;
671 // Get the properties objects
672 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
673 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
675 if ( mlt_properties_get_int( properties, "distort" ) == 0 && mlt_properties_get_int( b_props, "distort" ) == 0 && geometry->item.distort == 0 )
677 // Adjust b_frame pixel aspect
678 int normalised_width = geometry->item.w;
679 int normalised_height = geometry->item.h;
680 int real_width = get_value( b_props, "real_width", "width" );
681 int real_height = get_value( b_props, "real_height", "height" );
682 double input_ar = mlt_frame_get_aspect_ratio( b_frame );
683 double output_ar = mlt_properties_get_double( b_props, "consumer_aspect_ratio" );
684 int scaled_width = input_ar / output_ar * real_width;
685 int scaled_height = real_height;
687 // Now ensure that our images fit in the normalised frame
688 if ( scaled_width > normalised_width )
690 scaled_height = scaled_height * normalised_width / scaled_width;
691 scaled_width = normalised_width;
693 if ( scaled_height > normalised_height )
695 scaled_width = scaled_width * normalised_height / scaled_height;
696 scaled_height = normalised_height;
699 // Honour the fill request - this will scale the image to fill width or height while maintaining a/r
700 // ????: Shouln't this be the default behaviour?
701 if ( mlt_properties_get_int( properties, "fill" ) )
703 if ( scaled_height < normalised_height && scaled_width * normalised_height / scaled_height < normalised_width )
705 scaled_width = scaled_width * normalised_height / scaled_height;
706 scaled_height = normalised_height;
708 else if ( scaled_width < normalised_width && scaled_height * normalised_width / scaled_width < normalised_height )
710 scaled_height = scaled_height * normalised_width / scaled_width;
711 scaled_width = normalised_width;
715 // Save the new scaled dimensions
716 geometry->sw = scaled_width;
717 geometry->sh = scaled_height;
721 geometry->sw = geometry->item.w;
722 geometry->sh = geometry->item.h;
725 // We want to ensure that we bypass resize now...
726 mlt_properties_set_int( b_props, "distort", 1 );
728 // Take into consideration alignment for optimisation
729 if ( !mlt_properties_get_int( properties, "titles" ) )
730 alignment_calculate( geometry );
732 // Adjust to consumer scale
733 int x = geometry->item.x * *width / geometry->nw;
734 int y = geometry->item.y * *height / geometry->nh;
735 *width = geometry->sw * *width / geometry->nw;
736 *height = geometry->sh * *height / geometry->nh;
740 // optimization points - no work to do
741 if ( *width < 1 || *height < 1 )
744 if ( ( x < 0 && -x >= *width ) || ( y < 0 && -y >= *height ) )
747 ret = mlt_frame_get_image( b_frame, image, &format, width, height, 1 );
753 static mlt_geometry composite_calculate( mlt_transition this, struct geometry_s *result, mlt_frame a_frame, float position )
755 // Get the properties from the transition
756 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
758 // Get the properties from the frame
759 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
761 // Structures for geometry
762 mlt_geometry start = mlt_properties_get_data( properties, "geometries", NULL );
764 // Obtain the normalised width and height from the a_frame
765 int normalised_width = mlt_properties_get_int( a_props, "normalised_width" );
766 int normalised_height = mlt_properties_get_int( a_props, "normalised_height" );
768 // Now parse the geometries
771 // Parse the transitions properties
772 start = transition_parse_keys( this, normalised_width, normalised_height );
774 // Assign to properties to ensure we get destroyed
775 mlt_properties_set_data( properties, "geometries", start, 0, ( mlt_destructor )mlt_geometry_close, NULL );
779 int length = mlt_transition_get_out( this ) - mlt_transition_get_in( this ) + 1;
780 if ( mlt_properties_get_int( properties, "cycle" ) )
781 length = mlt_properties_get_int( properties, "cycle" );
782 mlt_geometry_refresh( start, mlt_properties_get( properties, "geometry" ), length, normalised_width, normalised_height );
785 // Do the calculation
786 geometry_calculate( this, result, position );
788 // Assign normalised info
789 result->nw = normalised_width;
790 result->nh = normalised_height;
792 // Now parse the alignment
793 result->halign = alignment_parse( mlt_properties_get( properties, "halign" ) );
794 result->valign = alignment_parse( mlt_properties_get( properties, "valign" ) );
799 static inline void inline_memcpy( uint8_t *dest, uint8_t *src, int length )
801 uint8_t *end = src + length;
809 mlt_frame composite_copy_region( mlt_transition this, mlt_frame a_frame, mlt_position frame_position )
811 // Create a frame to return
812 mlt_frame b_frame = mlt_frame_init( );
814 // Get the properties of the a frame
815 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
817 // Get the properties of the b frame
818 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
821 int position = position_calculate( this, frame_position );
824 uint8_t *dest = NULL;
826 // Get the image and dimensions
827 uint8_t *image = mlt_properties_get_data( a_props, "image", NULL );
828 int width = mlt_properties_get_int( a_props, "width" );
829 int height = mlt_properties_get_int( a_props, "height" );
831 // Pointers for copy operation
843 // Will need to know region to copy
844 struct geometry_s result;
846 float delta = delta_calculate( this, a_frame );
848 // Calculate the region now
849 composite_calculate( this, &result, a_frame, position + delta / 2 );
851 // Need to scale down to actual dimensions
852 x = rint( 0.5 + result.item.x * width / result.nw );
853 y = rint( 0.5 + result.item.y * height / result.nh );
854 w = rint( 0.5 + result.item.w * width / result.nw );
855 h = rint( 0.5 + result.item.h * height / result.nh );
857 // Make sure that x and w are even
873 // Now we need to create a new destination image
874 dest = mlt_pool_alloc( w * h * 2 );
876 // Assign to the new frame
877 mlt_properties_set_data( b_props, "image", dest, w * h * 2, mlt_pool_release, NULL );
878 mlt_properties_set_int( b_props, "width", w );
879 mlt_properties_set_int( b_props, "height", h );
888 if ( y + h > height )
889 h -= ( y + h - height );
898 if ( w > 0 && h > 0 )
900 // Copy the region of the image
901 p = image + y * ss + x * 2;
905 inline_memcpy( dest, p, w * 2 );
911 // Assign this position to the b frame
912 mlt_frame_set_position( b_frame, frame_position );
913 mlt_properties_set_int( b_props, "distort", 1 );
922 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
924 // Get the b frame from the stack
925 mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
927 // Get the transition from the a frame
928 mlt_transition this = mlt_frame_pop_service( a_frame );
930 // This compositer is yuv422 only
931 *format = mlt_image_yuv422;
933 // Get the image from the a frame
934 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
936 // Get the properties from the transition
937 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
939 if ( b_frame != NULL )
941 // Get the properties of the a frame
942 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
944 // Get the properties of the b frame
945 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
947 // Structures for geometry
948 struct geometry_s result;
950 // Calculate the position
951 float position = mlt_properties_get_double( b_props, "relative_position" );
952 float delta = delta_calculate( this, a_frame );
954 // Get the image from the b frame
955 uint8_t *image_b = NULL;
956 int width_b = *width;
957 int height_b = *height;
959 // Do the calculation
960 composite_calculate( this, &result, a_frame, position );
962 // Optimisation - no compositing required
963 if ( result.item.mix == 0 || ( result.item.w == 0 && result.item.h == 0 ) )
966 // Need to keep the width/height of the a_frame on the b_frame for titling
967 if ( mlt_properties_get( a_props, "dest_width" ) == NULL )
969 mlt_properties_set_int( a_props, "dest_width", *width );
970 mlt_properties_set_int( a_props, "dest_height", *height );
971 mlt_properties_set_int( b_props, "dest_width", *width );
972 mlt_properties_set_int( b_props, "dest_height", *height );
976 mlt_properties_set_int( b_props, "dest_width", mlt_properties_get_int( a_props, "dest_width" ) );
977 mlt_properties_set_int( b_props, "dest_height", mlt_properties_get_int( a_props, "dest_height" ) );
980 // Since we are the consumer of the b_frame, we must pass along these
981 // consumer properties from the a_frame
982 mlt_properties_set_double( b_props, "consumer_deinterlace", mlt_properties_get_double( a_props, "consumer_deinterlace" ) );
983 mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
984 mlt_properties_set_int( b_props, "normalised_width", mlt_properties_get_double( a_props, "normalised_width" ) );
985 mlt_properties_set_int( b_props, "normalised_height", mlt_properties_get_double( a_props, "normalised_height" ) );
987 // Special case for titling...
988 if ( mlt_properties_get_int( properties, "titles" ) )
990 if ( mlt_properties_get( b_props, "rescale.interp" ) == NULL )
991 mlt_properties_set( b_props, "rescale.interp", "hyper" );
992 width_b = mlt_properties_get_int( a_props, "dest_width" );
993 height_b = mlt_properties_get_int( a_props, "dest_height" );
996 if ( get_b_frame_image( this, b_frame, &image_b, &width_b, &height_b, &result ) == 0 )
998 uint8_t *dest = *image;
999 uint8_t *src = image_b;
1000 uint8_t *alpha = mlt_frame_get_alpha_mask( b_frame );
1002 mlt_properties_get_int( a_props, "consumer_deinterlace" ) ||
1003 mlt_properties_get_int( properties, "progressive" );
1006 int32_t luma_softness = mlt_properties_get_double( properties, "softness" ) * ( 1 << 16 );
1007 uint16_t *luma_bitmap = get_luma( properties, width_b, height_b );
1008 //composite_line_fn line_fn = mlt_properties_get_int( properties, "_MMX" ) ? composite_line_yuv_mmx : NULL;
1009 composite_line_fn line_fn = NULL;
1011 for ( field = 0; field < ( progressive ? 1 : 2 ); field++ )
1013 // Assume lower field (0) first
1014 float field_position = position + field * delta;
1016 // Do the calculation if we need to
1017 composite_calculate( this, &result, a_frame, field_position );
1019 if ( mlt_properties_get_int( properties, "titles" ) )
1021 result.item.w = *width * ( result.item.w / result.nw );
1022 result.nw = result.item.w;
1023 result.item.h = *height * ( result.item.h / result.nh );
1024 result.nh = *height;
1025 result.sw = width_b;
1026 result.sh = height_b;
1030 alignment_calculate( &result );
1032 // Composite the b_frame on the a_frame
1033 composite_yuv( dest, *width, *height, src, width_b, height_b, alpha, result, progressive ? -1 : field, luma_bitmap, luma_softness, line_fn );
1041 /** Composition transition processing.
1044 static mlt_frame composite_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame )
1046 // Get a unique name to store the frame position
1047 char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
1049 // Assign the current position to the name
1050 mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame ), name, mlt_frame_get_position( a_frame ) );
1052 // Propogate the transition properties to the b frame
1053 mlt_properties_set_double( MLT_FRAME_PROPERTIES( b_frame ), "relative_position", position_calculate( this, mlt_frame_get_position( a_frame ) ) );
1055 mlt_frame_push_service( a_frame, this );
1056 mlt_frame_push_frame( a_frame, b_frame );
1057 mlt_frame_push_get_image( a_frame, transition_get_image );
1061 /** Constructor for the filter.
1064 mlt_transition transition_composite_init( char *arg )
1066 mlt_transition this = calloc( sizeof( struct mlt_transition_s ), 1 );
1067 if ( this != NULL && mlt_transition_init( this, NULL ) == 0 )
1069 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
1071 this->process = composite_process;
1073 // Default starting motion and zoom
1074 mlt_properties_set( properties, "start", arg != NULL ? arg : "0,0:100%x100%" );
1077 mlt_properties_set( properties, "factory", "fezzik" );
1080 //mlt_properties_set_int( properties, "_MMX", composite_have_mmx() );