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;
109 double cycle = mlt_properties_get_double( properties, "cycle" );
111 // Get the new style geometry string
112 char *property = mlt_properties_get( properties, "geometry" );
114 // Allow a geometry repeat cycle
117 else if ( cycle > 0 )
120 // Parse the geometry if we have one
121 mlt_geometry_parse( geometry, property, length, normalised_width, normalised_height );
123 // Check if we're using the old style geometry
124 if ( property == NULL )
126 // DEPRECATED: Multiple keys for geometry information is inefficient and too rigid for
127 // practical use - while deprecated, it has been slightly extended too - keys can now
128 // be specified out of order, and can be blanked or NULL to simulate removal
130 // Structure to use for parsing and inserting
131 struct mlt_geometry_item_s item;
133 // Parse the start property
135 if ( mlt_geometry_parse_item( geometry, &item, mlt_properties_get( properties, "start" ) ) == 0 )
136 mlt_geometry_insert( geometry, &item );
138 // Parse the keys in between
139 for ( i = 0; i < mlt_properties_count( properties ); i ++ )
141 // Get the name of the property
142 char *name = mlt_properties_get_name( properties, i );
144 // Check that it's valid
145 if ( !strncmp( name, "key[", 4 ) )
147 // Get the value of the property
148 char *value = mlt_properties_get_value( properties, i );
150 // Determine the frame number
151 item.frame = atoi( name + 4 );
153 // Parse and add to the list
154 if ( mlt_geometry_parse_item( geometry, &item, value ) == 0 )
155 mlt_geometry_insert( geometry, &item );
157 fprintf( stderr, "Invalid Key - skipping %s = %s\n", name, value );
163 if ( mlt_geometry_parse_item( geometry, &item, mlt_properties_get( properties, "end" ) ) == 0 )
164 mlt_geometry_insert( geometry, &item );
170 /** Adjust position according to scaled size and alignment properties.
173 static void alignment_calculate( struct geometry_s *geometry )
175 geometry->item.x += ( geometry->item.w - geometry->sw ) * geometry->halign / 2;
176 geometry->item.y += ( geometry->item.h - geometry->sh ) * geometry->valign / 2;
179 /** Calculate the position for this frame.
182 static int position_calculate( mlt_transition this, mlt_position position )
184 // Get the in and out position
185 mlt_position in = mlt_transition_get_in( this );
188 return position - in;
191 /** Calculate the field delta for this frame - position between two frames.
194 static inline float delta_calculate( mlt_transition this, mlt_frame frame )
196 // Get the in and out position
197 mlt_position in = mlt_transition_get_in( this );
198 mlt_position out = mlt_transition_get_out( this );
199 float length = out - in + 1;
201 // Get the position of the frame
202 char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
203 mlt_position position = mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame ), name );
206 float x = ( float )( position - in ) / length;
207 float y = ( float )( position + 1 - in ) / length;
209 return length * ( y - x ) / 2.0;
212 static int get_value( mlt_properties properties, char *preferred, char *fallback )
214 int value = mlt_properties_get_int( properties, preferred );
216 value = mlt_properties_get_int( properties, fallback );
220 /** A linear threshold determination function.
223 static inline int32_t linearstep( int32_t edge1, int32_t edge2, int32_t a )
231 return ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
234 /** A smoother, non-linear threshold determination function.
237 static inline int32_t smoothstep( int32_t edge1, int32_t edge2, uint32_t a )
245 a = ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
247 return ( ( ( a * a ) >> 16 ) * ( ( 3 << 16 ) - ( 2 * a ) ) ) >> 16;
250 /** Load the luma map from PGM stream.
253 static void luma_read_pgm( FILE *f, uint16_t **map, int *width, int *height )
255 uint8_t *data = NULL;
267 // get the magic code
268 if ( fgets( line, 127, f ) == NULL )
272 while ( sscanf( line, " #%s", comment ) > 0 )
273 if ( fgets( line, 127, f ) == NULL )
276 if ( line[0] != 'P' || line[1] != '5' )
279 // skip white space and see if a new line must be fetched
280 for ( i = 2; i < 127 && line[i] != '\0' && isspace( line[i] ); i++ );
281 if ( ( line[i] == '\0' || line[i] == '#' ) && fgets( line, 127, f ) == NULL )
285 while ( sscanf( line, " #%s", comment ) > 0 )
286 if ( fgets( line, 127, f ) == NULL )
289 // get the dimensions
290 if ( line[0] == 'P' )
291 i = sscanf( line, "P5 %d %d %d", width, height, &maxval );
293 i = sscanf( line, "%d %d %d", width, height, &maxval );
295 // get the height value, if not yet
298 if ( fgets( line, 127, f ) == NULL )
302 while ( sscanf( line, " #%s", comment ) > 0 )
303 if ( fgets( line, 127, f ) == NULL )
306 i = sscanf( line, "%d", height );
313 // get the maximum gray value, if not yet
316 if ( fgets( line, 127, f ) == NULL )
320 while ( sscanf( line, " #%s", comment ) > 0 )
321 if ( fgets( line, 127, f ) == NULL )
324 i = sscanf( line, "%d", &maxval );
329 // determine if this is one or two bytes per pixel
330 bpp = maxval > 255 ? 2 : 1;
332 // allocate temporary storage for the raw data
333 data = mlt_pool_alloc( *width * *height * bpp );
338 if ( fread( data, *width * *height * bpp, 1, f ) != 1 )
341 // allocate the luma bitmap
342 *map = p = (uint16_t*)mlt_pool_alloc( *width * *height * sizeof( uint16_t ) );
346 // proces the raw data into the luma bitmap
347 for ( i = 0; i < *width * *height * bpp; i += bpp )
350 *p++ = data[ i ] << 8;
352 *p++ = ( data[ i ] << 8 ) + data[ i + 1 ];
359 mlt_pool_release( data );
362 /** Generate a luma map from any YUV image.
365 static void luma_read_yuv422( uint8_t *image, uint16_t **map, int width, int height )
369 // allocate the luma bitmap
370 uint16_t *p = *map = ( uint16_t* )mlt_pool_alloc( width * height * sizeof( uint16_t ) );
374 // proces the image data into the luma bitmap
375 for ( i = 0; i < width * height * 2; i += 2 )
376 *p++ = ( image[ i ] - 16 ) * 299; // 299 = 65535 / 219
380 /** Composite a source line over a destination line
384 void composite_line_yuv( uint8_t *dest, uint8_t *src, int width_src, uint8_t *alpha, int weight, uint16_t *luma, int softness )
389 for ( j = 0; j < width_src; j ++ )
391 a = ( alpha == NULL ) ? 255 : *alpha ++;
392 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
393 mix = ( mix * a ) >> 8;
394 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
396 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
401 /** Composite function.
404 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 )
408 int x_src = 0, y_src = 0;
409 int32_t weight = ( 1 << 16 ) * ( geometry.item.mix / 100 );
410 int step = ( field > -1 ) ? 2 : 1;
412 int stride_src = width_src * bpp;
413 int stride_dest = width_dest * bpp;
415 // Adjust to consumer scale
416 int x = rint( 0.5 + geometry.item.x * width_dest / geometry.nw );
417 int y = rint( 0.5 + geometry.item.y * height_dest / geometry.nh );
418 int x_uneven = x & 1;
420 // optimization points - no work to do
421 if ( width_src <= 0 || height_src <= 0 )
424 if ( ( x < 0 && -x >= width_src ) || ( y < 0 && -y >= height_src ) )
427 // crop overlay off the left edge of frame
435 // crop overlay beyond right edge of frame
436 if ( x + width_src > width_dest )
437 width_src = width_dest - x;
439 // crop overlay off the top edge of the frame
447 // crop overlay below bottom edge of frame
448 if ( y + height_src > height_dest )
449 height_src = height_dest - y;
451 // offset pointer into overlay buffer based on cropping
452 p_src += x_src * bpp + y_src * stride_src;
454 // offset pointer into frame buffer based upon positive coordinates only!
455 p_dest += ( x < 0 ? 0 : x ) * bpp + ( y < 0 ? 0 : y ) * stride_dest;
457 // offset pointer into alpha channel based upon cropping
459 p_alpha += x_src + y_src * stride_src / bpp;
461 // offset pointer into luma channel based upon cropping
463 p_luma += x_src + y_src * stride_src / bpp;
465 // Assuming lower field first
466 // Special care is taken to make sure the b_frame is aligned to the correct field.
467 // field 0 = lower field and y should be odd (y is 0-based).
468 // field 1 = upper field and y should be even.
469 if ( ( field > -1 ) && ( y % 2 == field ) )
471 if ( ( field == 1 && y < height_dest - 1 ) || ( field == 0 && y == 0 ) )
472 p_dest += stride_dest;
474 p_dest -= stride_dest;
477 // On the second field, use the other lines from b_frame
482 p_alpha += stride_src / bpp;
488 int alpha_stride = stride_src / bpp;
490 // Make sure than x and w are even
497 // now do the compositing only to cropped extents
498 if ( line_fn != NULL )
500 for ( i = 0; i < height_src; i += step )
502 line_fn( p_dest, p_src, width_src, p_alpha, weight, p_luma, softness );
505 p_dest += stride_dest;
507 p_alpha += alpha_stride;
509 p_luma += alpha_stride;
514 for ( i = 0; i < height_src; i += step )
516 composite_line_yuv( p_dest, p_src, width_src, p_alpha, weight, p_luma, softness );
519 p_dest += stride_dest;
521 p_alpha += alpha_stride;
523 p_luma += alpha_stride;
531 /** Scale 16bit greyscale luma map using nearest neighbor.
535 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 )
538 register int x_step = ( src_width << 16 ) / dest_width;
539 register int y_step = ( src_height << 16 ) / dest_height;
540 register int x, y = 0;
542 for ( i = 0; i < dest_height; i++ )
544 const uint16_t *src = src_buf + ( y >> 16 ) * src_width;
547 for ( j = 0; j < dest_width; j++ )
549 *dest_buf++ = src[ x >> 16 ] ^ invert;
556 static uint16_t* get_luma( mlt_properties properties, int width, int height )
558 // The cached luma map information
559 int luma_width = mlt_properties_get_int( properties, "_luma.width" );
560 int luma_height = mlt_properties_get_int( properties, "_luma.height" );
561 uint16_t *luma_bitmap = mlt_properties_get_data( properties, "_luma.bitmap", NULL );
562 int invert = mlt_properties_get_int( properties, "luma_invert" );
564 // If the filename property changed, reload the map
565 char *resource = mlt_properties_get( properties, "luma" );
569 if ( luma_width == 0 || luma_height == 0 )
572 luma_height = height;
575 if ( resource != NULL && strchr( resource, '%' ) )
577 // TODO: Clean up quick and dirty compressed/existence check
579 sprintf( temp, "%s/lumas/%s/%s", mlt_factory_prefix( ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource, '%' ) + 1 );
580 test = fopen( temp, "r" );
582 strcat( temp, ".png" );
588 if ( resource != NULL && ( luma_bitmap == NULL || luma_width != width || luma_height != height ) )
590 uint16_t *orig_bitmap = mlt_properties_get_data( properties, "_luma.orig_bitmap", NULL );
591 luma_width = mlt_properties_get_int( properties, "_luma.orig_width" );
592 luma_height = mlt_properties_get_int( properties, "_luma.orig_height" );
594 // Load the original luma once
595 if ( orig_bitmap == NULL )
597 char *extension = strrchr( resource, '.' );
599 // See if it is a PGM
600 if ( extension != NULL && strcmp( extension, ".pgm" ) == 0 )
603 FILE *f = fopen( resource, "r" );
607 luma_read_pgm( f, &orig_bitmap, &luma_width, &luma_height );
610 // Remember the original size for subsequent scaling
611 mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
612 mlt_properties_set_int( properties, "_luma.orig_width", luma_width );
613 mlt_properties_set_int( properties, "_luma.orig_height", luma_height );
618 // Get the factory producer service
619 char *factory = mlt_properties_get( properties, "factory" );
621 // Create the producer
622 mlt_producer producer = mlt_factory_producer( factory, resource );
625 if ( producer != NULL )
627 // Get the producer properties
628 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
630 // Ensure that we loop
631 mlt_properties_set( producer_properties, "eof", "loop" );
633 // Now pass all producer. properties on the transition down
634 mlt_properties_pass( producer_properties, properties, "luma." );
636 // We will get the alpha frame from the producer
637 mlt_frame luma_frame = NULL;
639 // Get the luma frame
640 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &luma_frame, 0 ) == 0 )
643 mlt_image_format luma_format = mlt_image_yuv422;
645 // Get image from the luma producer
646 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame ), "rescale.interp", "none" );
647 mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 );
649 // Generate the luma map
650 if ( luma_image != NULL && luma_format == mlt_image_yuv422 )
651 luma_read_yuv422( luma_image, &orig_bitmap, luma_width, luma_height );
653 // Remember the original size for subsequent scaling
654 mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
655 mlt_properties_set_int( properties, "_luma.orig_width", luma_width );
656 mlt_properties_set_int( properties, "_luma.orig_height", luma_height );
658 // Cleanup the luma frame
659 mlt_frame_close( luma_frame );
662 // Cleanup the luma producer
663 mlt_producer_close( producer );
668 luma_bitmap = mlt_pool_alloc( width * height * sizeof( uint16_t ) );
669 scale_luma( luma_bitmap, width, height, orig_bitmap, luma_width, luma_height, invert * ( ( 1 << 16 ) - 1 ) );
671 // Remember the scaled luma size to prevent unnecessary scaling
672 mlt_properties_set_int( properties, "_luma.width", width );
673 mlt_properties_set_int( properties, "_luma.height", height );
674 mlt_properties_set_data( properties, "_luma.bitmap", luma_bitmap, width * height * 2, mlt_pool_release, NULL );
679 /** Get the properly sized image from b_frame.
682 static int get_b_frame_image( mlt_transition this, mlt_frame b_frame, uint8_t **image, int *width, int *height, struct geometry_s *geometry )
685 mlt_image_format format = mlt_image_yuv422;
687 // Get the properties objects
688 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
689 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
691 if ( mlt_properties_get_int( properties, "distort" ) == 0 && mlt_properties_get_int( b_props, "distort" ) == 0 && geometry->item.distort == 0 )
693 // Adjust b_frame pixel aspect
694 int normalised_width = geometry->item.w;
695 int normalised_height = geometry->item.h;
696 int real_width = get_value( b_props, "real_width", "width" );
697 int real_height = get_value( b_props, "real_height", "height" );
698 double input_ar = mlt_frame_get_aspect_ratio( b_frame );
699 double output_ar = mlt_properties_get_double( b_props, "consumer_aspect_ratio" );
700 int scaled_width = input_ar / output_ar * real_width;
701 int scaled_height = real_height;
703 // Now ensure that our images fit in the normalised frame
704 if ( scaled_width > normalised_width )
706 scaled_height = scaled_height * normalised_width / scaled_width;
707 scaled_width = normalised_width;
709 if ( scaled_height > normalised_height )
711 scaled_width = scaled_width * normalised_height / scaled_height;
712 scaled_height = normalised_height;
715 // Honour the fill request - this will scale the image to fill width or height while maintaining a/r
716 // ????: Shouln't this be the default behaviour?
717 if ( mlt_properties_get_int( properties, "fill" ) )
719 if ( scaled_height < normalised_height && scaled_width * normalised_height / scaled_height < normalised_width )
721 scaled_width = scaled_width * normalised_height / scaled_height;
722 scaled_height = normalised_height;
724 else if ( scaled_width < normalised_width && scaled_height * normalised_width / scaled_width < normalised_height )
726 scaled_height = scaled_height * normalised_width / scaled_width;
727 scaled_width = normalised_width;
731 // Save the new scaled dimensions
732 geometry->sw = scaled_width;
733 geometry->sh = scaled_height;
737 geometry->sw = geometry->item.w;
738 geometry->sh = geometry->item.h;
741 // We want to ensure that we bypass resize now...
742 mlt_properties_set_int( b_props, "distort", 1 );
744 // Take into consideration alignment for optimisation
745 if ( !mlt_properties_get_int( properties, "titles" ) )
746 alignment_calculate( geometry );
748 // Adjust to consumer scale
749 *width = geometry->sw * *width / geometry->nw;
750 *height = geometry->sh * *height / geometry->nh;
752 ret = mlt_frame_get_image( b_frame, image, &format, width, height, 1 );
758 static mlt_geometry composite_calculate( mlt_transition this, struct geometry_s *result, mlt_frame a_frame, float position )
760 // Get the properties from the transition
761 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
763 // Get the properties from the frame
764 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
766 // Structures for geometry
767 mlt_geometry start = mlt_properties_get_data( properties, "geometries", NULL );
769 // Obtain the normalised width and height from the a_frame
770 int normalised_width = mlt_properties_get_int( a_props, "normalised_width" );
771 int normalised_height = mlt_properties_get_int( a_props, "normalised_height" );
773 // Now parse the geometries
776 // Parse the transitions properties
777 start = transition_parse_keys( this, normalised_width, normalised_height );
779 // Assign to properties to ensure we get destroyed
780 mlt_properties_set_data( properties, "geometries", start, 0, ( mlt_destructor )mlt_geometry_close, NULL );
784 int length = mlt_transition_get_out( this ) - mlt_transition_get_in( this ) + 1;
785 double cycle = mlt_properties_get_double( properties, "cycle" );
788 else if ( cycle > 0 )
790 mlt_geometry_refresh( start, mlt_properties_get( properties, "geometry" ), length, normalised_width, normalised_height );
793 // Do the calculation
794 geometry_calculate( this, result, position );
796 // Assign normalised info
797 result->nw = normalised_width;
798 result->nh = normalised_height;
800 // Now parse the alignment
801 result->halign = alignment_parse( mlt_properties_get( properties, "halign" ) );
802 result->valign = alignment_parse( mlt_properties_get( properties, "valign" ) );
807 static inline void inline_memcpy( uint8_t *dest, uint8_t *src, int length )
809 uint8_t *end = src + length;
817 mlt_frame composite_copy_region( mlt_transition this, mlt_frame a_frame, mlt_position frame_position )
819 // Create a frame to return
820 mlt_frame b_frame = mlt_frame_init( );
822 // Get the properties of the a frame
823 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
825 // Get the properties of the b frame
826 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
829 int position = position_calculate( this, frame_position );
832 uint8_t *dest = NULL;
834 // Get the image and dimensions
835 uint8_t *image = mlt_properties_get_data( a_props, "image", NULL );
836 int width = mlt_properties_get_int( a_props, "width" );
837 int height = mlt_properties_get_int( a_props, "height" );
839 // Pointers for copy operation
851 // Will need to know region to copy
852 struct geometry_s result;
854 float delta = delta_calculate( this, a_frame );
856 // Calculate the region now
857 composite_calculate( this, &result, a_frame, position + delta / 2 );
859 // Need to scale down to actual dimensions
860 x = rint( 0.5 + result.item.x * width / result.nw );
861 y = rint( 0.5 + result.item.y * height / result.nh );
862 w = rint( 0.5 + result.item.w * width / result.nw );
863 h = rint( 0.5 + result.item.h * height / result.nh );
865 // Make sure that x and w are even
881 // Now we need to create a new destination image
882 dest = mlt_pool_alloc( w * h * 2 );
884 // Assign to the new frame
885 mlt_properties_set_data( b_props, "image", dest, w * h * 2, mlt_pool_release, NULL );
886 mlt_properties_set_int( b_props, "width", w );
887 mlt_properties_set_int( b_props, "height", h );
896 if ( y + h > height )
897 h -= ( y + h - height );
906 if ( w > 0 && h > 0 )
908 // Copy the region of the image
909 p = image + y * ss + x * 2;
913 inline_memcpy( dest, p, w * 2 );
919 // Assign this position to the b frame
920 mlt_frame_set_position( b_frame, frame_position );
921 mlt_properties_set_int( b_props, "distort", 1 );
930 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
932 // Get the b frame from the stack
933 mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
935 // Get the transition from the a frame
936 mlt_transition this = mlt_frame_pop_service( a_frame );
939 int out = mlt_frame_pop_service_int( a_frame );
940 int in = mlt_frame_pop_service_int( a_frame );
942 // Get the properties from the transition
943 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
945 // TODO: clean up always_active behaviour
946 if ( mlt_properties_get_int( properties, "always_active" ) )
948 mlt_events_block( properties, properties );
949 mlt_properties_set_int( properties, "in", in );
950 mlt_properties_set_int( properties, "out", out );
951 mlt_events_unblock( properties, properties );
954 // This compositer is yuv422 only
955 *format = mlt_image_yuv422;
957 if ( b_frame != NULL )
959 // Get the properties of the a frame
960 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
962 // Get the properties of the b frame
963 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
965 // Structures for geometry
966 struct geometry_s result;
968 // Calculate the position
969 float position = mlt_properties_get_double( b_props, "relative_position" );
970 float delta = delta_calculate( this, a_frame );
972 // Get the image from the b frame
973 uint8_t *image_b = NULL;
974 int width_b = *width;
975 int height_b = *height;
977 // Do the calculation
978 composite_calculate( this, &result, a_frame, position );
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 // TODO: Dangerous/temporary optimisation - if nothing to do, then do nothing
988 if ( mlt_properties_get_int( properties, "no_alpha" ) &&
989 result.item.x == 0 && result.item.y == 0 && result.item.w == *width && result.item.h == *height && result.item.mix == 100 )
991 mlt_frame_get_image( b_frame, image, format, width, height, 1 );
992 if ( !mlt_frame_is_test_card( a_frame ) )
993 mlt_frame_replace_image( a_frame, *image, *format, *width, *height );
997 // Get the image from the a frame
998 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
1000 // Optimisation - no compositing required
1001 if ( result.item.mix == 0 || ( result.item.w == 0 && result.item.h == 0 ) )
1004 // Need to keep the width/height of the a_frame on the b_frame for titling
1005 if ( mlt_properties_get( a_props, "dest_width" ) == NULL )
1007 mlt_properties_set_int( a_props, "dest_width", *width );
1008 mlt_properties_set_int( a_props, "dest_height", *height );
1009 mlt_properties_set_int( b_props, "dest_width", *width );
1010 mlt_properties_set_int( b_props, "dest_height", *height );
1014 mlt_properties_set_int( b_props, "dest_width", mlt_properties_get_int( a_props, "dest_width" ) );
1015 mlt_properties_set_int( b_props, "dest_height", mlt_properties_get_int( a_props, "dest_height" ) );
1018 // Special case for titling...
1019 if ( mlt_properties_get_int( properties, "titles" ) )
1021 if ( mlt_properties_get( b_props, "rescale.interp" ) == NULL )
1022 mlt_properties_set( b_props, "rescale.interp", "hyper" );
1023 width_b = mlt_properties_get_int( a_props, "dest_width" );
1024 height_b = mlt_properties_get_int( a_props, "dest_height" );
1027 if ( get_b_frame_image( this, b_frame, &image_b, &width_b, &height_b, &result ) == 0 )
1029 uint8_t *dest = *image;
1030 uint8_t *src = image_b;
1031 uint8_t *alpha = mlt_frame_get_alpha_mask( b_frame );
1033 mlt_properties_get_int( a_props, "consumer_deinterlace" ) ||
1034 mlt_properties_get_int( properties, "progressive" );
1037 int32_t luma_softness = mlt_properties_get_double( properties, "softness" ) * ( 1 << 16 );
1038 uint16_t *luma_bitmap = get_luma( properties, width_b, height_b );
1039 //composite_line_fn line_fn = mlt_properties_get_int( properties, "_MMX" ) ? composite_line_yuv_mmx : NULL;
1040 composite_line_fn line_fn = NULL;
1042 for ( field = 0; field < ( progressive ? 1 : 2 ); field++ )
1044 // Assume lower field (0) first
1045 float field_position = position + field * delta;
1047 // Do the calculation if we need to
1048 composite_calculate( this, &result, a_frame, field_position );
1050 if ( mlt_properties_get_int( properties, "titles" ) )
1052 result.item.w = *width * ( result.item.w / result.nw );
1053 result.nw = result.item.w;
1054 result.item.h = *height * ( result.item.h / result.nh );
1055 result.nh = *height;
1056 result.sw = width_b;
1057 result.sh = height_b;
1061 alignment_calculate( &result );
1063 // Composite the b_frame on the a_frame
1064 composite_yuv( dest, *width, *height, src, width_b, height_b, alpha, result, progressive ? -1 : field, luma_bitmap, luma_softness, line_fn );
1070 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
1076 /** Composition transition processing.
1079 static mlt_frame composite_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame )
1081 // Get a unique name to store the frame position
1082 char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
1084 // UGH - this is a TODO - find a more reliable means of obtaining in/out for the always_active case
1085 if ( mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "always_active" ) == 0 )
1087 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "in" ) );
1088 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "out" ) );
1090 // Assign the current position to the name
1091 mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame ), name, mlt_frame_get_position( a_frame ) );
1093 // Propogate the transition properties to the b frame
1094 mlt_properties_set_double( MLT_FRAME_PROPERTIES( b_frame ), "relative_position", position_calculate( this, mlt_frame_get_position( a_frame ) ) );
1098 mlt_properties props = mlt_properties_get_data( MLT_FRAME_PROPERTIES( b_frame ), "_producer", NULL );
1099 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "in" ) );
1100 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "out" ) );
1101 mlt_properties_set_int( MLT_FRAME_PROPERTIES( b_frame ), "relative_position", mlt_properties_get_int( props, "_frame" ) );
1103 // Assign the current position to the name
1104 mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame ), name, mlt_properties_get_position( MLT_FRAME_PROPERTIES( b_frame ), "relative_position" ) );
1107 mlt_frame_push_service( a_frame, this );
1108 mlt_frame_push_frame( a_frame, b_frame );
1109 mlt_frame_push_get_image( a_frame, transition_get_image );
1113 /** Constructor for the filter.
1116 mlt_transition transition_composite_init( char *arg )
1118 mlt_transition this = calloc( sizeof( struct mlt_transition_s ), 1 );
1119 if ( this != NULL && mlt_transition_init( this, NULL ) == 0 )
1121 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
1123 this->process = composite_process;
1125 // Default starting motion and zoom
1126 mlt_properties_set( properties, "start", arg != NULL ? arg : "0,0:100%x100%" );
1129 mlt_properties_set( properties, "factory", "fezzik" );
1131 // Inform apps and framework that this is a video only transition
1132 mlt_properties_set_int( properties, "_transition_type", 1 );
1135 //mlt_properties_set_int( properties, "_MMX", composite_have_mmx() );