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_b, uint8_t *alpha_a, int weight, uint16_t *luma, int softness );
37 struct mlt_geometry_item_s item;
38 int nw; // normalised width
39 int nh; // normalised height
40 int sw; // scaled width, not including consumer scale based upon w/nw
41 int sh; // scaled height, not including consumer scale based upon h/nh
42 int halign; // horizontal alignment: 0=left, 1=center, 2=right
43 int valign; // vertical alignment: 0=top, 1=middle, 2=bottom
46 /** Parse the alignment properties into the geometry.
49 static int alignment_parse( char* align )
54 else if ( isdigit( align[ 0 ] ) )
56 else if ( align[ 0 ] == 'c' || align[ 0 ] == 'm' )
58 else if ( align[ 0 ] == 'r' || align[ 0 ] == 'b' )
64 /** Calculate real geometry.
67 static void geometry_calculate( mlt_transition this, struct geometry_s *output, double position )
69 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
70 mlt_geometry geometry = mlt_properties_get_data( properties, "geometries", NULL );
71 int mirror_off = mlt_properties_get_int( properties, "mirror_off" );
72 int repeat_off = mlt_properties_get_int( properties, "repeat_off" );
73 int length = mlt_geometry_get_length( geometry );
76 if ( !repeat_off && position >= length && length != 0 )
78 int section = position / length;
79 position -= section * length;
80 if ( !mirror_off && section % 2 == 1 )
81 position = length - position;
84 // Fetch the key for the position
85 mlt_geometry_fetch( geometry, &output->item, position );
88 static mlt_geometry transition_parse_keys( mlt_transition this, int normalised_width, int normalised_height )
90 // Loop variable for property interrogation
93 // Get the properties of the transition
94 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
96 // Create an empty geometries object
97 mlt_geometry geometry = mlt_geometry_init( );
99 // Get the in and out position
100 mlt_position in = mlt_transition_get_in( this );
101 mlt_position out = mlt_transition_get_out( this );
102 int length = out - in + 1;
103 double cycle = mlt_properties_get_double( properties, "cycle" );
105 // Get the new style geometry string
106 char *property = mlt_properties_get( properties, "geometry" );
108 // Allow a geometry repeat cycle
111 else if ( cycle > 0 )
114 // Parse the geometry if we have one
115 mlt_geometry_parse( geometry, property, length, normalised_width, normalised_height );
117 // Check if we're using the old style geometry
118 if ( property == NULL )
120 // DEPRECATED: Multiple keys for geometry information is inefficient and too rigid for
121 // practical use - while deprecated, it has been slightly extended too - keys can now
122 // be specified out of order, and can be blanked or NULL to simulate removal
124 // Structure to use for parsing and inserting
125 struct mlt_geometry_item_s item;
127 // Parse the start property
129 if ( mlt_geometry_parse_item( geometry, &item, mlt_properties_get( properties, "start" ) ) == 0 )
130 mlt_geometry_insert( geometry, &item );
132 // Parse the keys in between
133 for ( i = 0; i < mlt_properties_count( properties ); i ++ )
135 // Get the name of the property
136 char *name = mlt_properties_get_name( properties, i );
138 // Check that it's valid
139 if ( !strncmp( name, "key[", 4 ) )
141 // Get the value of the property
142 char *value = mlt_properties_get_value( properties, i );
144 // Determine the frame number
145 item.frame = atoi( name + 4 );
147 // Parse and add to the list
148 if ( mlt_geometry_parse_item( geometry, &item, value ) == 0 )
149 mlt_geometry_insert( geometry, &item );
151 fprintf( stderr, "Invalid Key - skipping %s = %s\n", name, value );
157 if ( mlt_geometry_parse_item( geometry, &item, mlt_properties_get( properties, "end" ) ) == 0 )
158 mlt_geometry_insert( geometry, &item );
164 /** Adjust position according to scaled size and alignment properties.
167 static void alignment_calculate( struct geometry_s *geometry )
169 geometry->item.x += ( geometry->item.w - geometry->sw ) * geometry->halign / 2;
170 geometry->item.y += ( geometry->item.h - geometry->sh ) * geometry->valign / 2;
173 /** Calculate the position for this frame.
176 static int position_calculate( mlt_transition this, mlt_position position )
178 // Get the in and out position
179 mlt_position in = mlt_transition_get_in( this );
182 return position - in;
185 /** Calculate the field delta for this frame - position between two frames.
188 static inline double delta_calculate( mlt_transition this, mlt_frame frame, mlt_position position )
190 // Get the in and out position
191 mlt_position in = mlt_transition_get_in( this );
192 mlt_position out = mlt_transition_get_out( this );
193 double length = out - in + 1;
196 double x = ( double )( position - in ) / length;
197 double y = ( double )( position + 1 - in ) / length;
199 return length * ( y - x ) / 2.0;
202 static int get_value( mlt_properties properties, char *preferred, char *fallback )
204 int value = mlt_properties_get_int( properties, preferred );
206 value = mlt_properties_get_int( properties, fallback );
210 /** A linear threshold determination function.
213 static inline int32_t linearstep( int32_t edge1, int32_t edge2, int32_t a )
221 return ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
224 /** A smoother, non-linear threshold determination function.
227 static inline int32_t smoothstep( int32_t edge1, int32_t edge2, uint32_t a )
235 a = ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
237 return ( ( ( a * a ) >> 16 ) * ( ( 3 << 16 ) - ( 2 * a ) ) ) >> 16;
240 /** Load the luma map from PGM stream.
243 static void luma_read_pgm( FILE *f, uint16_t **map, int *width, int *height )
245 uint8_t *data = NULL;
257 // get the magic code
258 if ( fgets( line, 127, f ) == NULL )
262 while ( sscanf( line, " #%s", comment ) > 0 )
263 if ( fgets( line, 127, f ) == NULL )
266 if ( line[0] != 'P' || line[1] != '5' )
269 // skip white space and see if a new line must be fetched
270 for ( i = 2; i < 127 && line[i] != '\0' && isspace( line[i] ); i++ );
271 if ( ( line[i] == '\0' || line[i] == '#' ) && fgets( line, 127, f ) == NULL )
275 while ( sscanf( line, " #%s", comment ) > 0 )
276 if ( fgets( line, 127, f ) == NULL )
279 // get the dimensions
280 if ( line[0] == 'P' )
281 i = sscanf( line, "P5 %d %d %d", width, height, &maxval );
283 i = sscanf( line, "%d %d %d", width, height, &maxval );
285 // get the height value, if not yet
288 if ( fgets( line, 127, f ) == NULL )
292 while ( sscanf( line, " #%s", comment ) > 0 )
293 if ( fgets( line, 127, f ) == NULL )
296 i = sscanf( line, "%d", height );
303 // get the maximum gray value, if not yet
306 if ( fgets( line, 127, f ) == NULL )
310 while ( sscanf( line, " #%s", comment ) > 0 )
311 if ( fgets( line, 127, f ) == NULL )
314 i = sscanf( line, "%d", &maxval );
319 // determine if this is one or two bytes per pixel
320 bpp = maxval > 255 ? 2 : 1;
322 // allocate temporary storage for the raw data
323 data = mlt_pool_alloc( *width * *height * bpp );
328 if ( fread( data, *width * *height * bpp, 1, f ) != 1 )
331 // allocate the luma bitmap
332 *map = p = (uint16_t*)mlt_pool_alloc( *width * *height * sizeof( uint16_t ) );
336 // proces the raw data into the luma bitmap
337 for ( i = 0; i < *width * *height * bpp; i += bpp )
340 *p++ = data[ i ] << 8;
342 *p++ = ( data[ i ] << 8 ) + data[ i + 1 ];
349 mlt_pool_release( data );
352 /** Generate a luma map from any YUV image.
355 static void luma_read_yuv422( uint8_t *image, uint16_t **map, int width, int height )
359 // allocate the luma bitmap
360 uint16_t *p = *map = ( uint16_t* )mlt_pool_alloc( width * height * sizeof( uint16_t ) );
364 // proces the image data into the luma bitmap
365 for ( i = 0; i < width * height * 2; i += 2 )
366 *p++ = ( image[ i ] - 16 ) * 299; // 299 = 65535 / 219
370 /** Composite a source line over a destination line
373 static void composite_line_yuv( uint8_t *dest, uint8_t *src, int width, uint8_t *alpha_b, uint8_t *alpha_a, int weight, uint16_t *luma, int softness )
379 for ( j = 0; j < width; j ++ )
382 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
383 mix = ( mix * a ) >> 8;
384 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
386 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
388 *alpha_a = mix | *alpha_a;
393 static void composite_line_yuv_or( uint8_t *dest, uint8_t *src, int width, uint8_t *alpha_b, uint8_t *alpha_a, int weight, uint16_t *luma, int softness )
399 for ( j = 0; j < width; j ++ )
401 a = *alpha_b ++ | *alpha_a;
402 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
403 mix = ( mix * a ) >> 8;
404 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
406 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
408 *alpha_a = mix | *alpha_a;
413 static void composite_line_yuv_and( uint8_t *dest, uint8_t *src, int width, uint8_t *alpha_b, uint8_t *alpha_a, int weight, uint16_t *luma, int softness )
419 for ( j = 0; j < width; j ++ )
421 a = *alpha_b ++ & *alpha_a;
422 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
423 mix = ( mix * a ) >> 8;
424 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
426 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
428 *alpha_a = mix | *alpha_a;
433 static void composite_line_yuv_xor( uint8_t *dest, uint8_t *src, int width, uint8_t *alpha_b, uint8_t *alpha_a, int weight, uint16_t *luma, int softness )
439 for ( j = 0; j < width; j ++ )
441 a = *alpha_b ++ ^ *alpha_a;
442 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
443 mix = ( mix * a ) >> 8;
444 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
446 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
448 *alpha_a = mix | *alpha_a;
453 /** Composite function.
456 static int composite_yuv( uint8_t *p_dest, int width_dest, int height_dest, uint8_t *p_src, int width_src, int height_src, uint8_t *alpha_b, uint8_t *alpha_a, struct geometry_s geometry, int field, uint16_t *p_luma, int32_t softness, composite_line_fn line_fn )
460 int x_src = 0, y_src = 0;
461 int32_t weight = ( 1 << 16 ) * ( geometry.item.mix / 100 );
462 int step = ( field > -1 ) ? 2 : 1;
464 int stride_src = width_src * bpp;
465 int stride_dest = width_dest * bpp;
467 // Adjust to consumer scale
468 int x = rint( 0.5 + geometry.item.x * width_dest / geometry.nw );
469 int y = rint( 0.5 + geometry.item.y * height_dest / geometry.nh );
470 int x_uneven = x & 1;
472 // optimization points - no work to do
473 if ( width_src <= 0 || height_src <= 0 )
476 if ( ( x < 0 && -x >= width_src ) || ( y < 0 && -y >= height_src ) )
479 // crop overlay off the left edge of frame
487 // crop overlay beyond right edge of frame
488 if ( x + width_src > width_dest )
489 width_src = width_dest - x;
491 // crop overlay off the top edge of the frame
499 // crop overlay below bottom edge of frame
500 if ( y + height_src > height_dest )
501 height_src = height_dest - y;
503 // offset pointer into overlay buffer based on cropping
504 p_src += x_src * bpp + y_src * stride_src;
506 // offset pointer into frame buffer based upon positive coordinates only!
507 p_dest += ( x < 0 ? 0 : x ) * bpp + ( y < 0 ? 0 : y ) * stride_dest;
509 // offset pointer into alpha channel based upon cropping
510 alpha_b += x_src + y_src * stride_src / bpp;
511 alpha_a += x + y * stride_dest / bpp;
513 // offset pointer into luma channel based upon cropping
515 p_luma += x_src + y_src * stride_src / bpp;
517 // Assuming lower field first
518 // Special care is taken to make sure the b_frame is aligned to the correct field.
519 // field 0 = lower field and y should be odd (y is 0-based).
520 // field 1 = upper field and y should be even.
521 if ( ( field > -1 ) && ( y % 2 == field ) )
523 if ( ( field == 1 && y < height_dest - 1 ) || ( field == 0 && y == 0 ) )
524 p_dest += stride_dest;
526 p_dest -= stride_dest;
529 // On the second field, use the other lines from b_frame
533 alpha_b += stride_src / bpp;
534 alpha_a += stride_dest / bpp;
540 int alpha_b_stride = stride_src / bpp;
541 int alpha_a_stride = stride_dest / bpp;
543 // Make sure than x and w are even
551 // now do the compositing only to cropped extents
552 for ( i = 0; i < height_src; i += step )
554 line_fn( p_dest, p_src, width_src, alpha_b, alpha_a, weight, p_luma, softness );
557 p_dest += stride_dest;
558 alpha_b += alpha_b_stride;
559 alpha_a += alpha_a_stride;
561 p_luma += alpha_b_stride;
568 /** Scale 16bit greyscale luma map using nearest neighbor.
572 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 )
575 register int x_step = ( src_width << 16 ) / dest_width;
576 register int y_step = ( src_height << 16 ) / dest_height;
577 register int x, y = 0;
579 for ( i = 0; i < dest_height; i++ )
581 const uint16_t *src = src_buf + ( y >> 16 ) * src_width;
584 for ( j = 0; j < dest_width; j++ )
586 *dest_buf++ = src[ x >> 16 ] ^ invert;
593 static uint16_t* get_luma( mlt_properties properties, int width, int height )
595 // The cached luma map information
596 int luma_width = mlt_properties_get_int( properties, "_luma.width" );
597 int luma_height = mlt_properties_get_int( properties, "_luma.height" );
598 uint16_t *luma_bitmap = mlt_properties_get_data( properties, "_luma.bitmap", NULL );
599 int invert = mlt_properties_get_int( properties, "luma_invert" );
601 // If the filename property changed, reload the map
602 char *resource = mlt_properties_get( properties, "luma" );
606 if ( luma_width == 0 || luma_height == 0 )
609 luma_height = height;
612 if ( resource != NULL && strchr( resource, '%' ) )
614 // TODO: Clean up quick and dirty compressed/existence check
616 sprintf( temp, "%s/lumas/%s/%s", mlt_factory_prefix( ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource, '%' ) + 1 );
617 test = fopen( temp, "r" );
619 strcat( temp, ".png" );
625 if ( resource != NULL && ( luma_bitmap == NULL || luma_width != width || luma_height != height ) )
627 uint16_t *orig_bitmap = mlt_properties_get_data( properties, "_luma.orig_bitmap", NULL );
628 luma_width = mlt_properties_get_int( properties, "_luma.orig_width" );
629 luma_height = mlt_properties_get_int( properties, "_luma.orig_height" );
631 // Load the original luma once
632 if ( orig_bitmap == NULL )
634 char *extension = strrchr( resource, '.' );
636 // See if it is a PGM
637 if ( extension != NULL && strcmp( extension, ".pgm" ) == 0 )
640 FILE *f = fopen( resource, "r" );
644 luma_read_pgm( f, &orig_bitmap, &luma_width, &luma_height );
647 // Remember the original size for subsequent scaling
648 mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
649 mlt_properties_set_int( properties, "_luma.orig_width", luma_width );
650 mlt_properties_set_int( properties, "_luma.orig_height", luma_height );
655 // Get the factory producer service
656 char *factory = mlt_properties_get( properties, "factory" );
658 // Create the producer
659 mlt_producer producer = mlt_factory_producer( factory, resource );
662 if ( producer != NULL )
664 // Get the producer properties
665 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
667 // Ensure that we loop
668 mlt_properties_set( producer_properties, "eof", "loop" );
670 // Now pass all producer. properties on the transition down
671 mlt_properties_pass( producer_properties, properties, "luma." );
673 // We will get the alpha frame from the producer
674 mlt_frame luma_frame = NULL;
676 // Get the luma frame
677 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &luma_frame, 0 ) == 0 )
680 mlt_image_format luma_format = mlt_image_yuv422;
682 // Get image from the luma producer
683 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame ), "rescale.interp", "none" );
684 mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 );
686 // Generate the luma map
687 if ( luma_image != NULL && luma_format == mlt_image_yuv422 )
688 luma_read_yuv422( luma_image, &orig_bitmap, luma_width, luma_height );
690 // Remember the original size for subsequent scaling
691 mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
692 mlt_properties_set_int( properties, "_luma.orig_width", luma_width );
693 mlt_properties_set_int( properties, "_luma.orig_height", luma_height );
695 // Cleanup the luma frame
696 mlt_frame_close( luma_frame );
699 // Cleanup the luma producer
700 mlt_producer_close( producer );
705 luma_bitmap = mlt_pool_alloc( width * height * sizeof( uint16_t ) );
706 scale_luma( luma_bitmap, width, height, orig_bitmap, luma_width, luma_height, invert * ( ( 1 << 16 ) - 1 ) );
708 // Remember the scaled luma size to prevent unnecessary scaling
709 mlt_properties_set_int( properties, "_luma.width", width );
710 mlt_properties_set_int( properties, "_luma.height", height );
711 mlt_properties_set_data( properties, "_luma.bitmap", luma_bitmap, width * height * 2, mlt_pool_release, NULL );
716 /** Get the properly sized image from b_frame.
719 static int get_b_frame_image( mlt_transition this, mlt_frame b_frame, uint8_t **image, int *width, int *height, struct geometry_s *geometry )
722 mlt_image_format format = mlt_image_yuv422;
724 // Get the properties objects
725 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
726 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
728 if ( mlt_properties_get_int( properties, "distort" ) == 0 && mlt_properties_get_int( b_props, "distort" ) == 0 && geometry->item.distort == 0 )
730 // Adjust b_frame pixel aspect
731 int normalised_width = geometry->item.w;
732 int normalised_height = geometry->item.h;
733 int real_width = get_value( b_props, "real_width", "width" );
734 int real_height = get_value( b_props, "real_height", "height" );
735 double input_ar = mlt_properties_get_double( b_props, "aspect_ratio" );
736 double output_ar = mlt_properties_get_double( b_props, "consumer_aspect_ratio" );
737 int scaled_width = ( input_ar == 0.0 ? output_ar : input_ar ) / output_ar * real_width;
738 int scaled_height = real_height;
740 // Now ensure that our images fit in the normalised frame
741 if ( scaled_width > normalised_width )
743 scaled_height = scaled_height * normalised_width / scaled_width;
744 scaled_width = normalised_width;
746 if ( scaled_height > normalised_height )
748 scaled_width = scaled_width * normalised_height / scaled_height;
749 scaled_height = normalised_height;
752 // Honour the fill request - this will scale the image to fill width or height while maintaining a/r
753 // ????: Shouln't this be the default behaviour?
754 if ( mlt_properties_get_int( properties, "fill" ) && scaled_width > 0 && scaled_height > 0 )
756 if ( scaled_height < normalised_height && scaled_width * normalised_height / scaled_height < normalised_width )
758 scaled_width = scaled_width * normalised_height / scaled_height;
759 scaled_height = normalised_height;
761 else if ( scaled_width < normalised_width && scaled_height * normalised_width / scaled_width < normalised_height )
763 scaled_height = scaled_height * normalised_width / scaled_width;
764 scaled_width = normalised_width;
768 // Save the new scaled dimensions
769 geometry->sw = scaled_width;
770 geometry->sh = scaled_height;
774 geometry->sw = geometry->item.w;
775 geometry->sh = geometry->item.h;
778 // We want to ensure that we bypass resize now...
779 mlt_properties_set_int( b_props, "distort", 1 );
781 // Take into consideration alignment for optimisation
782 if ( !mlt_properties_get_int( properties, "titles" ) )
783 alignment_calculate( geometry );
785 // Adjust to consumer scale
786 *width = geometry->sw * *width / geometry->nw;
787 *height = geometry->sh * *height / geometry->nh;
789 ret = mlt_frame_get_image( b_frame, image, &format, width, height, 1 );
791 return ret && image != NULL;
795 static mlt_geometry composite_calculate( mlt_transition this, struct geometry_s *result, mlt_frame a_frame, double position )
797 // Get the properties from the transition
798 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
800 // Get the properties from the frame
801 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
803 // Structures for geometry
804 mlt_geometry start = mlt_properties_get_data( properties, "geometries", NULL );
806 // Obtain the normalised width and height from the a_frame
807 int normalised_width = mlt_properties_get_int( a_props, "normalised_width" );
808 int normalised_height = mlt_properties_get_int( a_props, "normalised_height" );
810 // Now parse the geometries
813 // Parse the transitions properties
814 start = transition_parse_keys( this, normalised_width, normalised_height );
816 // Assign to properties to ensure we get destroyed
817 mlt_properties_set_data( properties, "geometries", start, 0, ( mlt_destructor )mlt_geometry_close, NULL );
821 int length = mlt_transition_get_out( this ) - mlt_transition_get_in( this ) + 1;
822 double cycle = mlt_properties_get_double( properties, "cycle" );
825 else if ( cycle > 0 )
827 mlt_geometry_refresh( start, mlt_properties_get( properties, "geometry" ), length, normalised_width, normalised_height );
830 // Do the calculation
831 geometry_calculate( this, result, position );
833 // Assign normalised info
834 result->nw = normalised_width;
835 result->nh = normalised_height;
837 // Now parse the alignment
838 result->halign = alignment_parse( mlt_properties_get( properties, "halign" ) );
839 result->valign = alignment_parse( mlt_properties_get( properties, "valign" ) );
844 static inline void inline_memcpy( uint8_t *dest, uint8_t *src, int length )
846 uint8_t *end = src + length;
854 mlt_frame composite_copy_region( mlt_transition this, mlt_frame a_frame, mlt_position frame_position )
856 // Create a frame to return
857 mlt_frame b_frame = mlt_frame_init( );
859 // Get the properties of the a frame
860 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
862 // Get the properties of the b frame
863 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
866 int position = position_calculate( this, frame_position );
869 uint8_t *dest = NULL;
871 // Get the image and dimensions
872 uint8_t *image = mlt_properties_get_data( a_props, "image", NULL );
873 int width = mlt_properties_get_int( a_props, "width" );
874 int height = mlt_properties_get_int( a_props, "height" );
876 // Pointers for copy operation
888 // Will need to know region to copy
889 struct geometry_s result;
891 double delta = delta_calculate( this, a_frame, frame_position );
893 // Calculate the region now
894 composite_calculate( this, &result, a_frame, position + delta / 2 );
896 // Need to scale down to actual dimensions
897 x = rint( 0.5 + result.item.x * width / result.nw );
898 y = rint( 0.5 + result.item.y * height / result.nh );
899 w = rint( 0.5 + result.item.w * width / result.nw );
900 h = rint( 0.5 + result.item.h * height / result.nh );
902 // Make sure that x and w are even
918 // Now we need to create a new destination image
919 dest = mlt_pool_alloc( w * h * 2 );
921 // Assign to the new frame
922 mlt_properties_set_data( b_props, "image", dest, w * h * 2, mlt_pool_release, NULL );
923 mlt_properties_set_int( b_props, "width", w );
924 mlt_properties_set_int( b_props, "height", h );
933 if ( y + h > height )
934 h -= ( y + h - height );
943 if ( w > 0 && h > 0 )
945 // Copy the region of the image
946 p = image + y * ss + x * 2;
950 inline_memcpy( dest, p, w * 2 );
956 // Assign this position to the b frame
957 mlt_frame_set_position( b_frame, frame_position );
958 mlt_properties_set_int( b_props, "distort", 1 );
967 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
969 // Get the b frame from the stack
970 mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
972 // Get the transition from the a frame
973 mlt_transition this = mlt_frame_pop_service( a_frame );
976 double position = mlt_deque_pop_back_double( MLT_FRAME_IMAGE_STACK( a_frame ) );
977 int out = mlt_frame_pop_service_int( a_frame );
978 int in = mlt_frame_pop_service_int( a_frame );
980 // Get the properties from the transition
981 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
983 // TODO: clean up always_active behaviour
984 if ( mlt_properties_get_int( properties, "always_active" ) )
986 mlt_events_block( properties, properties );
987 mlt_properties_set_int( properties, "in", in );
988 mlt_properties_set_int( properties, "out", out );
989 mlt_events_unblock( properties, properties );
992 // This compositer is yuv422 only
993 *format = mlt_image_yuv422;
995 if ( b_frame != NULL )
997 // Get the properties of the a frame
998 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
1000 // Get the properties of the b frame
1001 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
1003 // Structures for geometry
1004 struct geometry_s result;
1006 // Calculate the position
1007 double delta = delta_calculate( this, a_frame, position );
1009 // Get the image from the b frame
1010 uint8_t *image_b = NULL;
1011 int width_b = *width;
1012 int height_b = *height;
1015 uint8_t *alpha_a = NULL;
1016 uint8_t *alpha_b = NULL;
1018 // Composites always need scaling... defaulting to lowest
1019 char *rescale = mlt_properties_get( a_props, "rescale.interp" );
1020 if ( rescale == NULL || !strcmp( rescale, "none" ) )
1021 rescale = "nearest";
1022 mlt_properties_set( a_props, "rescale.interp", rescale );
1023 mlt_properties_set( b_props, "rescale.interp", rescale );
1025 // Do the calculation
1026 composite_calculate( this, &result, a_frame, position );
1028 // Since we are the consumer of the b_frame, we must pass along these
1029 // consumer properties from the a_frame
1030 mlt_properties_set_double( b_props, "consumer_deinterlace", mlt_properties_get_double( a_props, "consumer_deinterlace" ) );
1031 mlt_properties_set( b_props, "consumer_deinterlace_method", mlt_properties_get( a_props, "consumer_deinterlace_method" ) );
1032 mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
1034 // TODO: Dangerous/temporary optimisation - if nothing to do, then do nothing
1035 if ( mlt_properties_get_int( properties, "no_alpha" ) &&
1036 result.item.x == 0 && result.item.y == 0 && result.item.w == *width && result.item.h == *height && result.item.mix == 100 )
1038 mlt_frame_get_image( b_frame, image, format, width, height, 1 );
1039 if ( !mlt_frame_is_test_card( a_frame ) )
1040 mlt_frame_replace_image( a_frame, *image, *format, *width, *height );
1044 if ( a_frame == b_frame )
1046 double aspect_ratio = mlt_frame_get_aspect_ratio( b_frame );
1047 get_b_frame_image( this, b_frame, &image_b, &width_b, &height_b, &result );
1048 alpha_b = mlt_frame_get_alpha_mask( b_frame );
1049 mlt_properties_set_double( a_props, "aspect_ratio", aspect_ratio );
1052 // Get the image from the a frame
1053 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
1054 alpha_a = mlt_frame_get_alpha_mask( a_frame );
1056 // Optimisation - no compositing required
1057 if ( result.item.mix == 0 || ( result.item.w == 0 && result.item.h == 0 ) )
1060 // Need to keep the width/height of the a_frame on the b_frame for titling
1061 if ( mlt_properties_get( a_props, "dest_width" ) == NULL )
1063 mlt_properties_set_int( a_props, "dest_width", *width );
1064 mlt_properties_set_int( a_props, "dest_height", *height );
1065 mlt_properties_set_int( b_props, "dest_width", *width );
1066 mlt_properties_set_int( b_props, "dest_height", *height );
1070 mlt_properties_set_int( b_props, "dest_width", mlt_properties_get_int( a_props, "dest_width" ) );
1071 mlt_properties_set_int( b_props, "dest_height", mlt_properties_get_int( a_props, "dest_height" ) );
1074 // Special case for titling...
1075 if ( mlt_properties_get_int( properties, "titles" ) )
1077 if ( mlt_properties_get( b_props, "rescale.interp" ) == NULL )
1078 mlt_properties_set( b_props, "rescale.interp", "hyper" );
1079 width_b = mlt_properties_get_int( a_props, "dest_width" );
1080 height_b = mlt_properties_get_int( a_props, "dest_height" );
1083 if ( *image != image_b && ( image_b != NULL || get_b_frame_image( this, b_frame, &image_b, &width_b, &height_b, &result ) == 0 ) )
1085 uint8_t *dest = *image;
1086 uint8_t *src = image_b;
1088 mlt_properties_get_int( a_props, "consumer_deinterlace" ) ||
1089 mlt_properties_get_int( properties, "progressive" );
1092 int32_t luma_softness = mlt_properties_get_double( properties, "softness" ) * ( 1 << 16 );
1093 uint16_t *luma_bitmap = get_luma( properties, width_b, height_b );
1094 char *operator = mlt_properties_get( properties, "operator" );
1096 alpha_b = alpha_b == NULL ? mlt_frame_get_alpha_mask( b_frame ) : alpha_b;
1098 composite_line_fn line_fn = composite_line_yuv;
1100 // Silly - this isn't a good solution - deprecating
1101 if ( mlt_properties_get_int( properties, "or" ) )
1102 line_fn = composite_line_yuv_or;
1103 if ( mlt_properties_get_int( properties, "and" ) )
1104 line_fn = composite_line_yuv_and;
1105 if ( mlt_properties_get_int( properties, "xor" ) )
1106 line_fn = composite_line_yuv_xor;
1108 // Replacement and override
1109 if ( operator != NULL )
1111 if ( !strcmp( operator, "or" ) )
1112 line_fn = composite_line_yuv_or;
1113 if ( !strcmp( operator, "and" ) )
1114 line_fn = composite_line_yuv_and;
1115 if ( !strcmp( operator, "xor" ) )
1116 line_fn = composite_line_yuv_xor;
1119 // Allow the user to completely obliterate the alpha channels from both frames
1120 if ( mlt_properties_get( properties, "alpha_a" ) )
1121 memset( alpha_a, mlt_properties_get_int( properties, "alpha_a" ), *width * *height );
1123 if ( mlt_properties_get( properties, "alpha_b" ) )
1124 memset( alpha_b, mlt_properties_get_int( properties, "alpha_b" ), width_b * height_b );
1126 for ( field = 0; field < ( progressive ? 1 : 2 ); field++ )
1128 // Assume lower field (0) first
1129 double field_position = position + field * delta;
1131 // Do the calculation if we need to
1132 composite_calculate( this, &result, a_frame, field_position );
1134 if ( mlt_properties_get_int( properties, "titles" ) )
1136 result.item.w = *width * ( result.item.w / result.nw );
1137 result.nw = result.item.w;
1138 result.item.h = *height * ( result.item.h / result.nh );
1139 result.nh = *height;
1140 result.sw = width_b;
1141 result.sh = height_b;
1145 alignment_calculate( &result );
1147 // Composite the b_frame on the a_frame
1148 composite_yuv( dest, *width, *height, src, width_b, height_b, alpha_b, alpha_a, result, progressive ? -1 : field, luma_bitmap, luma_softness, line_fn );
1154 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
1160 /** Composition transition processing.
1163 static mlt_frame composite_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame )
1165 // UGH - this is a TODO - find a more reliable means of obtaining in/out for the always_active case
1166 if ( mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "always_active" ) == 0 )
1168 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "in" ) );
1169 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "out" ) );
1170 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame ), position_calculate( this, mlt_frame_get_position( a_frame ) ) );
1174 mlt_properties props = mlt_properties_get_data( MLT_FRAME_PROPERTIES( b_frame ), "_producer", NULL );
1175 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "in" ) );
1176 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "out" ) );
1177 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame ), mlt_properties_get_int( props, "_frame" ) - mlt_properties_get_int( props, "in" ) );
1180 mlt_frame_push_service( a_frame, this );
1181 mlt_frame_push_frame( a_frame, b_frame );
1182 mlt_frame_push_get_image( a_frame, transition_get_image );
1186 /** Constructor for the filter.
1189 mlt_transition transition_composite_init( char *arg )
1191 mlt_transition this = calloc( sizeof( struct mlt_transition_s ), 1 );
1192 if ( this != NULL && mlt_transition_init( this, NULL ) == 0 )
1194 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
1196 this->process = composite_process;
1198 // Default starting motion and zoom
1199 mlt_properties_set( properties, "start", arg != NULL ? arg : "0,0:100%x100%" );
1202 mlt_properties_set( properties, "factory", "fezzik" );
1204 // Inform apps and framework that this is a video only transition
1205 mlt_properties_set_int( properties, "_transition_type", 1 );
1208 //mlt_properties_set_int( properties, "_MMX", composite_have_mmx() );