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, uint8_t *full_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, uint8_t *full_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;
398 if ( full_alpha && *full_alpha == 0 ) { *full_alpha = a; }
403 /** Composite function.
406 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, uint8_t *full_alpha, struct geometry_s geometry, int field, uint16_t *p_luma, int32_t softness, composite_line_fn line_fn )
410 int x_src = 0, y_src = 0;
411 int32_t weight = ( 1 << 16 ) * ( geometry.item.mix / 100 );
412 int step = ( field > -1 ) ? 2 : 1;
414 int stride_src = width_src * bpp;
415 int stride_dest = width_dest * bpp;
417 // Adjust to consumer scale
418 int x = rint( 0.5 + geometry.item.x * width_dest / geometry.nw );
419 int y = rint( 0.5 + geometry.item.y * height_dest / geometry.nh );
420 int x_uneven = x & 1;
422 // optimization points - no work to do
423 if ( width_src <= 0 || height_src <= 0 )
426 if ( ( x < 0 && -x >= width_src ) || ( y < 0 && -y >= height_src ) )
429 // crop overlay off the left edge of frame
437 // crop overlay beyond right edge of frame
438 if ( x + width_src > width_dest )
439 width_src = width_dest - x;
441 // crop overlay off the top edge of the frame
449 // crop overlay below bottom edge of frame
450 if ( y + height_src > height_dest )
451 height_src = height_dest - y;
453 // offset pointer into overlay buffer based on cropping
454 p_src += x_src * bpp + y_src * stride_src;
456 // offset pointer into frame buffer based upon positive coordinates only!
457 p_dest += ( x < 0 ? 0 : x ) * bpp + ( y < 0 ? 0 : y ) * stride_dest;
459 // offset pointer into alpha channel based upon cropping
461 p_alpha += x_src + y_src * stride_src / bpp;
464 full_alpha += x + y * stride_dest / bpp;
466 // offset pointer into luma channel based upon cropping
468 p_luma += x_src + y_src * stride_src / bpp;
470 // Assuming lower field first
471 // Special care is taken to make sure the b_frame is aligned to the correct field.
472 // field 0 = lower field and y should be odd (y is 0-based).
473 // field 1 = upper field and y should be even.
474 if ( ( field > -1 ) && ( y % 2 == field ) )
476 if ( ( field == 1 && y < height_dest - 1 ) || ( field == 0 && y == 0 ) )
477 p_dest += stride_dest;
479 p_dest -= stride_dest;
482 // On the second field, use the other lines from b_frame
487 p_alpha += stride_src / bpp;
489 full_alpha += stride_dest / bpp;
495 int alpha_stride = stride_src / bpp;
496 int full_alpha_stride = stride_dest / bpp;
498 // Make sure than x and w are even
506 // now do the compositing only to cropped extents
507 if ( line_fn != NULL )
509 for ( i = 0; i < height_src; i += step )
511 line_fn( p_dest, p_src, width_src, p_alpha, full_alpha, weight, p_luma, softness );
514 p_dest += stride_dest;
516 p_alpha += alpha_stride;
518 full_alpha += full_alpha_stride;
520 p_luma += alpha_stride;
525 for ( i = 0; i < height_src; i += step )
527 composite_line_yuv( p_dest, p_src, width_src, p_alpha, full_alpha, weight, p_luma, softness );
530 p_dest += stride_dest;
532 p_alpha += alpha_stride;
534 full_alpha += full_alpha_stride;
536 p_luma += alpha_stride;
544 /** Scale 16bit greyscale luma map using nearest neighbor.
548 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 )
551 register int x_step = ( src_width << 16 ) / dest_width;
552 register int y_step = ( src_height << 16 ) / dest_height;
553 register int x, y = 0;
555 for ( i = 0; i < dest_height; i++ )
557 const uint16_t *src = src_buf + ( y >> 16 ) * src_width;
560 for ( j = 0; j < dest_width; j++ )
562 *dest_buf++ = src[ x >> 16 ] ^ invert;
569 static uint16_t* get_luma( mlt_properties properties, int width, int height )
571 // The cached luma map information
572 int luma_width = mlt_properties_get_int( properties, "_luma.width" );
573 int luma_height = mlt_properties_get_int( properties, "_luma.height" );
574 uint16_t *luma_bitmap = mlt_properties_get_data( properties, "_luma.bitmap", NULL );
575 int invert = mlt_properties_get_int( properties, "luma_invert" );
577 // If the filename property changed, reload the map
578 char *resource = mlt_properties_get( properties, "luma" );
582 if ( luma_width == 0 || luma_height == 0 )
585 luma_height = height;
588 if ( resource != NULL && strchr( resource, '%' ) )
590 // TODO: Clean up quick and dirty compressed/existence check
592 sprintf( temp, "%s/lumas/%s/%s", mlt_factory_prefix( ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource, '%' ) + 1 );
593 test = fopen( temp, "r" );
595 strcat( temp, ".png" );
601 if ( resource != NULL && ( luma_bitmap == NULL || luma_width != width || luma_height != height ) )
603 uint16_t *orig_bitmap = mlt_properties_get_data( properties, "_luma.orig_bitmap", NULL );
604 luma_width = mlt_properties_get_int( properties, "_luma.orig_width" );
605 luma_height = mlt_properties_get_int( properties, "_luma.orig_height" );
607 // Load the original luma once
608 if ( orig_bitmap == NULL )
610 char *extension = strrchr( resource, '.' );
612 // See if it is a PGM
613 if ( extension != NULL && strcmp( extension, ".pgm" ) == 0 )
616 FILE *f = fopen( resource, "r" );
620 luma_read_pgm( f, &orig_bitmap, &luma_width, &luma_height );
623 // Remember the original size for subsequent scaling
624 mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
625 mlt_properties_set_int( properties, "_luma.orig_width", luma_width );
626 mlt_properties_set_int( properties, "_luma.orig_height", luma_height );
631 // Get the factory producer service
632 char *factory = mlt_properties_get( properties, "factory" );
634 // Create the producer
635 mlt_producer producer = mlt_factory_producer( factory, resource );
638 if ( producer != NULL )
640 // Get the producer properties
641 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
643 // Ensure that we loop
644 mlt_properties_set( producer_properties, "eof", "loop" );
646 // Now pass all producer. properties on the transition down
647 mlt_properties_pass( producer_properties, properties, "luma." );
649 // We will get the alpha frame from the producer
650 mlt_frame luma_frame = NULL;
652 // Get the luma frame
653 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &luma_frame, 0 ) == 0 )
656 mlt_image_format luma_format = mlt_image_yuv422;
658 // Get image from the luma producer
659 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame ), "rescale.interp", "none" );
660 mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 );
662 // Generate the luma map
663 if ( luma_image != NULL && luma_format == mlt_image_yuv422 )
664 luma_read_yuv422( luma_image, &orig_bitmap, luma_width, luma_height );
666 // Remember the original size for subsequent scaling
667 mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
668 mlt_properties_set_int( properties, "_luma.orig_width", luma_width );
669 mlt_properties_set_int( properties, "_luma.orig_height", luma_height );
671 // Cleanup the luma frame
672 mlt_frame_close( luma_frame );
675 // Cleanup the luma producer
676 mlt_producer_close( producer );
681 luma_bitmap = mlt_pool_alloc( width * height * sizeof( uint16_t ) );
682 scale_luma( luma_bitmap, width, height, orig_bitmap, luma_width, luma_height, invert * ( ( 1 << 16 ) - 1 ) );
684 // Remember the scaled luma size to prevent unnecessary scaling
685 mlt_properties_set_int( properties, "_luma.width", width );
686 mlt_properties_set_int( properties, "_luma.height", height );
687 mlt_properties_set_data( properties, "_luma.bitmap", luma_bitmap, width * height * 2, mlt_pool_release, NULL );
692 /** Get the properly sized image from b_frame.
695 static int get_b_frame_image( mlt_transition this, mlt_frame b_frame, uint8_t **image, int *width, int *height, struct geometry_s *geometry )
698 mlt_image_format format = mlt_image_yuv422;
700 // Get the properties objects
701 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
702 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
704 if ( mlt_properties_get_int( properties, "distort" ) == 0 && mlt_properties_get_int( b_props, "distort" ) == 0 && geometry->item.distort == 0 )
706 // Adjust b_frame pixel aspect
707 int normalised_width = geometry->item.w;
708 int normalised_height = geometry->item.h;
709 int real_width = get_value( b_props, "real_width", "width" );
710 int real_height = get_value( b_props, "real_height", "height" );
711 double input_ar = mlt_frame_get_aspect_ratio( b_frame );
712 double output_ar = mlt_properties_get_double( b_props, "consumer_aspect_ratio" );
713 int scaled_width = input_ar / output_ar * real_width;
714 int scaled_height = real_height;
716 // Now ensure that our images fit in the normalised frame
717 if ( scaled_width > normalised_width )
719 scaled_height = scaled_height * normalised_width / scaled_width;
720 scaled_width = normalised_width;
722 if ( scaled_height > normalised_height )
724 scaled_width = scaled_width * normalised_height / scaled_height;
725 scaled_height = normalised_height;
728 // Honour the fill request - this will scale the image to fill width or height while maintaining a/r
729 // ????: Shouln't this be the default behaviour?
730 if ( mlt_properties_get_int( properties, "fill" ) )
732 if ( scaled_height < normalised_height && scaled_width * normalised_height / scaled_height < normalised_width )
734 scaled_width = scaled_width * normalised_height / scaled_height;
735 scaled_height = normalised_height;
737 else if ( scaled_width < normalised_width && scaled_height * normalised_width / scaled_width < normalised_height )
739 scaled_height = scaled_height * normalised_width / scaled_width;
740 scaled_width = normalised_width;
744 // Save the new scaled dimensions
745 geometry->sw = scaled_width;
746 geometry->sh = scaled_height;
750 geometry->sw = geometry->item.w;
751 geometry->sh = geometry->item.h;
754 // We want to ensure that we bypass resize now...
755 mlt_properties_set_int( b_props, "distort", 1 );
757 // Take into consideration alignment for optimisation
758 if ( !mlt_properties_get_int( properties, "titles" ) )
759 alignment_calculate( geometry );
761 // Adjust to consumer scale
762 *width = geometry->sw * *width / geometry->nw;
763 *height = geometry->sh * *height / geometry->nh;
765 ret = mlt_frame_get_image( b_frame, image, &format, width, height, 1 );
767 return ret && image != NULL;
771 static mlt_geometry composite_calculate( mlt_transition this, struct geometry_s *result, mlt_frame a_frame, float position )
773 // Get the properties from the transition
774 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
776 // Get the properties from the frame
777 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
779 // Structures for geometry
780 mlt_geometry start = mlt_properties_get_data( properties, "geometries", NULL );
782 // Obtain the normalised width and height from the a_frame
783 int normalised_width = mlt_properties_get_int( a_props, "normalised_width" );
784 int normalised_height = mlt_properties_get_int( a_props, "normalised_height" );
786 // Now parse the geometries
789 // Parse the transitions properties
790 start = transition_parse_keys( this, normalised_width, normalised_height );
792 // Assign to properties to ensure we get destroyed
793 mlt_properties_set_data( properties, "geometries", start, 0, ( mlt_destructor )mlt_geometry_close, NULL );
797 int length = mlt_transition_get_out( this ) - mlt_transition_get_in( this ) + 1;
798 double cycle = mlt_properties_get_double( properties, "cycle" );
801 else if ( cycle > 0 )
803 mlt_geometry_refresh( start, mlt_properties_get( properties, "geometry" ), length, normalised_width, normalised_height );
806 // Do the calculation
807 geometry_calculate( this, result, position );
809 // Assign normalised info
810 result->nw = normalised_width;
811 result->nh = normalised_height;
813 // Now parse the alignment
814 result->halign = alignment_parse( mlt_properties_get( properties, "halign" ) );
815 result->valign = alignment_parse( mlt_properties_get( properties, "valign" ) );
820 static inline void inline_memcpy( uint8_t *dest, uint8_t *src, int length )
822 uint8_t *end = src + length;
830 mlt_frame composite_copy_region( mlt_transition this, mlt_frame a_frame, mlt_position frame_position )
832 // Create a frame to return
833 mlt_frame b_frame = mlt_frame_init( );
835 // Get the properties of the a frame
836 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
838 // Get the properties of the b frame
839 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
842 int position = position_calculate( this, frame_position );
845 uint8_t *dest = NULL;
847 // Get the image and dimensions
848 uint8_t *image = mlt_properties_get_data( a_props, "image", NULL );
849 int width = mlt_properties_get_int( a_props, "width" );
850 int height = mlt_properties_get_int( a_props, "height" );
852 // Pointers for copy operation
864 // Will need to know region to copy
865 struct geometry_s result;
867 float delta = delta_calculate( this, a_frame );
869 // Calculate the region now
870 composite_calculate( this, &result, a_frame, position + delta / 2 );
872 // Need to scale down to actual dimensions
873 x = rint( 0.5 + result.item.x * width / result.nw );
874 y = rint( 0.5 + result.item.y * height / result.nh );
875 w = rint( 0.5 + result.item.w * width / result.nw );
876 h = rint( 0.5 + result.item.h * height / result.nh );
878 // Make sure that x and w are even
894 // Now we need to create a new destination image
895 dest = mlt_pool_alloc( w * h * 2 );
897 // Assign to the new frame
898 mlt_properties_set_data( b_props, "image", dest, w * h * 2, mlt_pool_release, NULL );
899 mlt_properties_set_int( b_props, "width", w );
900 mlt_properties_set_int( b_props, "height", h );
909 if ( y + h > height )
910 h -= ( y + h - height );
919 if ( w > 0 && h > 0 )
921 // Copy the region of the image
922 p = image + y * ss + x * 2;
926 inline_memcpy( dest, p, w * 2 );
932 // Assign this position to the b frame
933 mlt_frame_set_position( b_frame, frame_position );
934 mlt_properties_set_int( b_props, "distort", 1 );
943 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
945 // Get the b frame from the stack
946 mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
948 // Get the transition from the a frame
949 mlt_transition this = mlt_frame_pop_service( a_frame );
952 int out = mlt_frame_pop_service_int( a_frame );
953 int in = mlt_frame_pop_service_int( a_frame );
955 // Get the properties from the transition
956 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
958 // TODO: clean up always_active behaviour
959 if ( mlt_properties_get_int( properties, "always_active" ) )
961 mlt_events_block( properties, properties );
962 mlt_properties_set_int( properties, "in", in );
963 mlt_properties_set_int( properties, "out", out );
964 mlt_events_unblock( properties, properties );
967 // This compositer is yuv422 only
968 *format = mlt_image_yuv422;
970 if ( b_frame != NULL )
972 // Get the properties of the a frame
973 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
975 // Get the properties of the b frame
976 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
978 // Structures for geometry
979 struct geometry_s result;
981 // Calculate the position
982 float position = mlt_properties_get_double( b_props, "relative_position" );
983 float delta = delta_calculate( this, a_frame );
985 // Get the image from the b frame
986 uint8_t *image_b = NULL;
987 int width_b = *width;
988 int height_b = *height;
990 // Do the calculation
991 composite_calculate( this, &result, a_frame, position );
993 // Since we are the consumer of the b_frame, we must pass along these
994 // consumer properties from the a_frame
995 mlt_properties_set_double( b_props, "consumer_deinterlace", mlt_properties_get_double( a_props, "consumer_deinterlace" ) );
996 mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
997 mlt_properties_set_int( b_props, "normalised_width", mlt_properties_get_double( a_props, "normalised_width" ) );
998 mlt_properties_set_int( b_props, "normalised_height", mlt_properties_get_double( a_props, "normalised_height" ) );
1000 // TODO: Dangerous/temporary optimisation - if nothing to do, then do nothing
1001 if ( mlt_properties_get_int( properties, "no_alpha" ) &&
1002 result.item.x == 0 && result.item.y == 0 && result.item.w == *width && result.item.h == *height && result.item.mix == 100 )
1004 mlt_frame_get_image( b_frame, image, format, width, height, 1 );
1005 if ( !mlt_frame_is_test_card( a_frame ) )
1006 mlt_frame_replace_image( a_frame, *image, *format, *width, *height );
1010 // Get the image from the a frame
1011 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
1013 // Optimisation - no compositing required
1014 if ( result.item.mix == 0 || ( result.item.w == 0 && result.item.h == 0 ) )
1017 // Need to keep the width/height of the a_frame on the b_frame for titling
1018 if ( mlt_properties_get( a_props, "dest_width" ) == NULL )
1020 mlt_properties_set_int( a_props, "dest_width", *width );
1021 mlt_properties_set_int( a_props, "dest_height", *height );
1022 mlt_properties_set_int( b_props, "dest_width", *width );
1023 mlt_properties_set_int( b_props, "dest_height", *height );
1027 mlt_properties_set_int( b_props, "dest_width", mlt_properties_get_int( a_props, "dest_width" ) );
1028 mlt_properties_set_int( b_props, "dest_height", mlt_properties_get_int( a_props, "dest_height" ) );
1031 // Special case for titling...
1032 if ( mlt_properties_get_int( properties, "titles" ) )
1034 if ( mlt_properties_get( b_props, "rescale.interp" ) == NULL )
1035 mlt_properties_set( b_props, "rescale.interp", "hyper" );
1036 width_b = mlt_properties_get_int( a_props, "dest_width" );
1037 height_b = mlt_properties_get_int( a_props, "dest_height" );
1040 if ( get_b_frame_image( this, b_frame, &image_b, &width_b, &height_b, &result ) == 0 )
1042 uint8_t *dest = *image;
1043 uint8_t *src = image_b;
1044 uint8_t *alpha = mlt_frame_get_alpha_mask( b_frame );
1045 uint8_t *full_alpha = mlt_frame_get_alpha_mask( a_frame );
1047 mlt_properties_get_int( a_props, "consumer_deinterlace" ) ||
1048 mlt_properties_get_int( properties, "progressive" );
1051 int32_t luma_softness = mlt_properties_get_double( properties, "softness" ) * ( 1 << 16 );
1052 uint16_t *luma_bitmap = get_luma( properties, width_b, height_b );
1053 //composite_line_fn line_fn = mlt_properties_get_int( properties, "_MMX" ) ? composite_line_yuv_mmx : NULL;
1054 composite_line_fn line_fn = NULL;
1056 if ( full_alpha == NULL )
1058 full_alpha = mlt_pool_alloc( *width * *height );
1059 memset( full_alpha, 255, *width * *height );
1060 a_frame->get_alpha_mask = NULL;
1061 mlt_properties_set_data( a_props, "alpha", full_alpha, 0, mlt_pool_release, NULL );
1064 for ( field = 0; field < ( progressive ? 1 : 2 ); field++ )
1066 // Assume lower field (0) first
1067 float field_position = position + field * delta;
1069 // Do the calculation if we need to
1070 composite_calculate( this, &result, a_frame, field_position );
1072 if ( mlt_properties_get_int( properties, "titles" ) )
1074 result.item.w = *width * ( result.item.w / result.nw );
1075 result.nw = result.item.w;
1076 result.item.h = *height * ( result.item.h / result.nh );
1077 result.nh = *height;
1078 result.sw = width_b;
1079 result.sh = height_b;
1083 alignment_calculate( &result );
1085 // Composite the b_frame on the a_frame
1086 composite_yuv( dest, *width, *height, src, width_b, height_b, alpha, full_alpha, result, progressive ? -1 : field, luma_bitmap, luma_softness, line_fn );
1092 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
1098 /** Composition transition processing.
1101 static mlt_frame composite_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame )
1103 // Get a unique name to store the frame position
1104 char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
1106 // UGH - this is a TODO - find a more reliable means of obtaining in/out for the always_active case
1107 if ( mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "always_active" ) == 0 )
1109 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "in" ) );
1110 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "out" ) );
1112 // Assign the current position to the name
1113 mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame ), name, mlt_frame_get_position( a_frame ) );
1115 // Propogate the transition properties to the b frame
1116 mlt_properties_set_double( MLT_FRAME_PROPERTIES( b_frame ), "relative_position", position_calculate( this, mlt_frame_get_position( a_frame ) ) );
1120 mlt_properties props = mlt_properties_get_data( MLT_FRAME_PROPERTIES( b_frame ), "_producer", NULL );
1121 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "in" ) );
1122 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "out" ) );
1123 mlt_properties_set_int( MLT_FRAME_PROPERTIES( b_frame ), "relative_position", mlt_properties_get_int( props, "_frame" ) - mlt_properties_get_int( props, "in" ) );
1125 // Assign the current position to the name
1126 mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame ), name, mlt_properties_get_position( MLT_FRAME_PROPERTIES( b_frame ), "relative_position" ) );
1129 mlt_frame_push_service( a_frame, this );
1130 mlt_frame_push_frame( a_frame, b_frame );
1131 mlt_frame_push_get_image( a_frame, transition_get_image );
1135 /** Constructor for the filter.
1138 mlt_transition transition_composite_init( char *arg )
1140 mlt_transition this = calloc( sizeof( struct mlt_transition_s ), 1 );
1141 if ( this != NULL && mlt_transition_init( this, NULL ) == 0 )
1143 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
1145 this->process = composite_process;
1147 // Default starting motion and zoom
1148 mlt_properties_set( properties, "start", arg != NULL ? arg : "0,0:100%x100%" );
1151 mlt_properties_set( properties, "factory", "fezzik" );
1153 // Inform apps and framework that this is a video only transition
1154 mlt_properties_set_int( properties, "_transition_type", 1 );
1157 //mlt_properties_set_int( properties, "_MMX", composite_have_mmx() );