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, int uneven );
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, int uneven_x )
378 int uneven_w = width % 2;
380 for ( j = 0; j < width; j ++ )
383 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
384 mix = ( mix * a ) >> 8;
385 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
387 *dest = ( *( src ++ + uneven_x ) * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
389 *alpha_a = mix | *alpha_a;
396 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
397 mix = ( mix * a ) >> 8;
398 *dest = ( *src ++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
400 *alpha_a = mix | *alpha_a;
405 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, int uneven_x )
410 int uneven_w = width % 2;
412 for ( j = 0; j < width; j ++ )
414 a = *alpha_b ++ | *alpha_a;
415 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
416 mix = ( mix * a ) >> 8;
417 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
419 *dest = ( *( src ++ + uneven_x ) * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
421 *alpha_a = mix | *alpha_a;
427 a = *alpha_b ++ | *alpha_a;
428 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
429 mix = ( mix * a ) >> 8;
430 *dest = ( *( src ++ + uneven_x ) * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
432 *alpha_a = mix | *alpha_a;
437 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, int uneven_x )
442 int uneven_w = width % 2;
444 for ( j = 0; j < width; j ++ )
446 a = *alpha_b ++ & *alpha_a;
447 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
448 mix = ( mix * a ) >> 8;
449 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
451 *dest = ( *( src ++ ) * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
453 *alpha_a = mix | *alpha_a;
459 a = *alpha_b ++ & *alpha_a;
460 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
461 mix = ( mix * a ) >> 8;
462 *dest = ( *src ++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
464 *alpha_a = mix | *alpha_a;
469 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, int uneven_x )
474 int uneven_w = width % 2;
476 for ( j = 0; j < width; j ++ )
478 a = *alpha_b ++ ^ *alpha_a;
479 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
480 mix = ( mix * a ) >> 8;
481 *dest = ( *src++ * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
483 *dest = ( *( src ++ + uneven_x ) * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
485 *alpha_a = mix | *alpha_a;
491 a = *alpha_b ++ ^ *alpha_a;
492 mix = ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + softness, weight + softness );
493 mix = ( mix * a ) >> 8;
494 *dest = ( *( src ++ + uneven_x ) * mix + *dest * ( ( 1 << 16 ) - mix ) ) >> 16;
496 *alpha_a = mix | *alpha_a;
501 /** Composite function.
504 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 )
508 int x_src = 0, y_src = 0;
509 int32_t weight = ( 1 << 16 ) * ( geometry.item.mix / 100 );
510 int step = ( field > -1 ) ? 2 : 1;
512 int stride_src = width_src * bpp;
513 int stride_dest = width_dest * bpp;
515 // Adjust to consumer scale
516 int x = rint( 0.5 + geometry.item.x * width_dest / geometry.nw );
517 int y = rint( 0.5 + geometry.item.y * height_dest / geometry.nh );
518 int uneven_x = 2 * ( x % 2 );
520 // optimization points - no work to do
521 if ( width_src <= 0 || height_src <= 0 )
524 if ( ( x < 0 && -x >= width_src ) || ( y < 0 && -y >= height_src ) )
527 // crop overlay off the left edge of frame
535 // crop overlay beyond right edge of frame
536 if ( x + width_src > width_dest )
537 width_src = width_dest - x;
539 // crop overlay off the top edge of the frame
547 // crop overlay below bottom edge of frame
548 if ( y + height_src > height_dest )
549 height_src = height_dest - y;
551 // offset pointer into overlay buffer based on cropping
552 p_src += x_src * bpp + y_src * stride_src;
554 // offset pointer into frame buffer based upon positive coordinates only!
555 p_dest += ( x < 0 ? 0 : x ) * bpp + ( y < 0 ? 0 : y ) * stride_dest;
557 // offset pointer into alpha channel based upon cropping
558 alpha_b += x_src + y_src * stride_src / bpp;
559 alpha_a += x + y * stride_dest / bpp;
561 // offset pointer into luma channel based upon cropping
563 p_luma += x_src + y_src * stride_src / bpp;
565 // Assuming lower field first
566 // Special care is taken to make sure the b_frame is aligned to the correct field.
567 // field 0 = lower field and y should be odd (y is 0-based).
568 // field 1 = upper field and y should be even.
569 if ( ( field > -1 ) && ( y % 2 == field ) )
571 if ( ( field == 1 && y < height_dest - 1 ) || ( field == 0 && y == 0 ) )
572 p_dest += stride_dest;
574 p_dest -= stride_dest;
577 // On the second field, use the other lines from b_frame
581 alpha_b += stride_src / bpp;
582 alpha_a += stride_dest / bpp;
588 int alpha_b_stride = stride_src / bpp;
589 int alpha_a_stride = stride_dest / bpp;
591 // Incorrect, but keeps noise away?
594 // now do the compositing only to cropped extents
595 for ( i = 0; i < height_src; i += step )
597 line_fn( p_dest, p_src, width_src, alpha_b, alpha_a, weight, p_luma, softness, uneven_x );
600 p_dest += stride_dest;
601 alpha_b += alpha_b_stride;
602 alpha_a += alpha_a_stride;
604 p_luma += alpha_b_stride;
611 /** Scale 16bit greyscale luma map using nearest neighbor.
615 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 )
618 register int x_step = ( src_width << 16 ) / dest_width;
619 register int y_step = ( src_height << 16 ) / dest_height;
620 register int x, y = 0;
622 for ( i = 0; i < dest_height; i++ )
624 const uint16_t *src = src_buf + ( y >> 16 ) * src_width;
627 for ( j = 0; j < dest_width; j++ )
629 *dest_buf++ = src[ x >> 16 ] ^ invert;
636 static uint16_t* get_luma( mlt_properties properties, int width, int height )
638 // The cached luma map information
639 int luma_width = mlt_properties_get_int( properties, "_luma.width" );
640 int luma_height = mlt_properties_get_int( properties, "_luma.height" );
641 uint16_t *luma_bitmap = mlt_properties_get_data( properties, "_luma.bitmap", NULL );
642 int invert = mlt_properties_get_int( properties, "luma_invert" );
644 // If the filename property changed, reload the map
645 char *resource = mlt_properties_get( properties, "luma" );
649 if ( luma_width == 0 || luma_height == 0 )
652 luma_height = height;
655 if ( resource != NULL && strchr( resource, '%' ) )
657 // TODO: Clean up quick and dirty compressed/existence check
659 sprintf( temp, "%s/lumas/%s/%s", mlt_factory_prefix( ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource, '%' ) + 1 );
660 test = fopen( temp, "r" );
662 strcat( temp, ".png" );
668 if ( resource != NULL && ( luma_bitmap == NULL || luma_width != width || luma_height != height ) )
670 uint16_t *orig_bitmap = mlt_properties_get_data( properties, "_luma.orig_bitmap", NULL );
671 luma_width = mlt_properties_get_int( properties, "_luma.orig_width" );
672 luma_height = mlt_properties_get_int( properties, "_luma.orig_height" );
674 // Load the original luma once
675 if ( orig_bitmap == NULL )
677 char *extension = strrchr( resource, '.' );
679 // See if it is a PGM
680 if ( extension != NULL && strcmp( extension, ".pgm" ) == 0 )
683 FILE *f = fopen( resource, "r" );
687 luma_read_pgm( f, &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 );
698 // Get the factory producer service
699 char *factory = mlt_properties_get( properties, "factory" );
701 // Create the producer
702 mlt_producer producer = mlt_factory_producer( factory, resource );
705 if ( producer != NULL )
707 // Get the producer properties
708 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
710 // Ensure that we loop
711 mlt_properties_set( producer_properties, "eof", "loop" );
713 // Now pass all producer. properties on the transition down
714 mlt_properties_pass( producer_properties, properties, "luma." );
716 // We will get the alpha frame from the producer
717 mlt_frame luma_frame = NULL;
719 // Get the luma frame
720 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &luma_frame, 0 ) == 0 )
723 mlt_image_format luma_format = mlt_image_yuv422;
725 // Get image from the luma producer
726 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame ), "rescale.interp", "none" );
727 mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 );
729 // Generate the luma map
730 if ( luma_image != NULL && luma_format == mlt_image_yuv422 )
731 luma_read_yuv422( luma_image, &orig_bitmap, luma_width, luma_height );
733 // Remember the original size for subsequent scaling
734 mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
735 mlt_properties_set_int( properties, "_luma.orig_width", luma_width );
736 mlt_properties_set_int( properties, "_luma.orig_height", luma_height );
738 // Cleanup the luma frame
739 mlt_frame_close( luma_frame );
742 // Cleanup the luma producer
743 mlt_producer_close( producer );
748 luma_bitmap = mlt_pool_alloc( width * height * sizeof( uint16_t ) );
749 scale_luma( luma_bitmap, width, height, orig_bitmap, luma_width, luma_height, invert * ( ( 1 << 16 ) - 1 ) );
751 // Remember the scaled luma size to prevent unnecessary scaling
752 mlt_properties_set_int( properties, "_luma.width", width );
753 mlt_properties_set_int( properties, "_luma.height", height );
754 mlt_properties_set_data( properties, "_luma.bitmap", luma_bitmap, width * height * 2, mlt_pool_release, NULL );
759 /** Get the properly sized image from b_frame.
762 static int get_b_frame_image( mlt_transition this, mlt_frame b_frame, uint8_t **image, int *width, int *height, struct geometry_s *geometry )
765 mlt_image_format format = mlt_image_yuv422;
767 // Get the properties objects
768 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
769 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
771 if ( mlt_properties_get_int( properties, "distort" ) == 0 && mlt_properties_get_int( b_props, "distort" ) == 0 && geometry->item.distort == 0 )
773 // Adjust b_frame pixel aspect
774 int normalised_width = geometry->item.w;
775 int normalised_height = geometry->item.h;
776 int real_width = get_value( b_props, "real_width", "width" );
777 int real_height = get_value( b_props, "real_height", "height" );
778 double input_ar = mlt_properties_get_double( b_props, "aspect_ratio" );
779 double output_ar = mlt_properties_get_double( b_props, "consumer_aspect_ratio" );
780 int scaled_width = ( input_ar == 0.0 ? output_ar : input_ar ) / output_ar * real_width;
781 int scaled_height = real_height;
783 // Now ensure that our images fit in the normalised frame
784 if ( scaled_width > normalised_width )
786 scaled_height = scaled_height * normalised_width / scaled_width;
787 scaled_width = normalised_width;
789 if ( scaled_height > normalised_height )
791 scaled_width = scaled_width * normalised_height / scaled_height;
792 scaled_height = normalised_height;
795 // Honour the fill request - this will scale the image to fill width or height while maintaining a/r
796 // ????: Shouln't this be the default behaviour?
797 if ( mlt_properties_get_int( properties, "fill" ) && scaled_width > 0 && scaled_height > 0 )
799 if ( scaled_height < normalised_height && scaled_width * normalised_height / scaled_height < normalised_width )
801 scaled_width = scaled_width * normalised_height / scaled_height;
802 scaled_height = normalised_height;
804 else if ( scaled_width < normalised_width && scaled_height * normalised_width / scaled_width < normalised_height )
806 scaled_height = scaled_height * normalised_width / scaled_width;
807 scaled_width = normalised_width;
811 // Save the new scaled dimensions
812 geometry->sw = scaled_width;
813 geometry->sh = scaled_height;
817 geometry->sw = geometry->item.w;
818 geometry->sh = geometry->item.h;
821 // We want to ensure that we bypass resize now...
822 mlt_properties_set_int( b_props, "distort", 1 );
824 // Take into consideration alignment for optimisation
825 if ( !mlt_properties_get_int( properties, "titles" ) )
826 alignment_calculate( geometry );
828 // Adjust to consumer scale
829 *width = geometry->sw * *width / geometry->nw;
830 *height = geometry->sh * *height / geometry->nh;
832 ret = mlt_frame_get_image( b_frame, image, &format, width, height, 1 );
834 return ret && image != NULL;
838 static mlt_geometry composite_calculate( mlt_transition this, struct geometry_s *result, mlt_frame a_frame, double position )
840 // Get the properties from the transition
841 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
843 // Get the properties from the frame
844 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
846 // Structures for geometry
847 mlt_geometry start = mlt_properties_get_data( properties, "geometries", NULL );
849 // Obtain the normalised width and height from the a_frame
850 int normalised_width = mlt_properties_get_int( a_props, "normalised_width" );
851 int normalised_height = mlt_properties_get_int( a_props, "normalised_height" );
853 char *name = mlt_properties_get( properties, "_unique_id" );
856 sprintf( key, "%s.in", name );
857 if ( mlt_properties_get( a_props, key ) )
859 sscanf( mlt_properties_get( a_props, key ), "%f,%f,%f,%f,%f,%d,%d", &result->item.x, &result->item.y, &result->item.w, &result->item.h, &result->item.mix, &result->nw, &result->nh );
863 // Now parse the geometries
866 // Parse the transitions properties
867 start = transition_parse_keys( this, normalised_width, normalised_height );
869 // Assign to properties to ensure we get destroyed
870 mlt_properties_set_data( properties, "geometries", start, 0, ( mlt_destructor )mlt_geometry_close, NULL );
874 int length = mlt_transition_get_out( this ) - mlt_transition_get_in( this ) + 1;
875 double cycle = mlt_properties_get_double( properties, "cycle" );
878 else if ( cycle > 0 )
880 mlt_geometry_refresh( start, mlt_properties_get( properties, "geometry" ), length, normalised_width, normalised_height );
883 // Do the calculation
884 geometry_calculate( this, result, position );
886 // Assign normalised info
887 result->nw = normalised_width;
888 result->nh = normalised_height;
891 // Now parse the alignment
892 result->halign = alignment_parse( mlt_properties_get( properties, "halign" ) );
893 result->valign = alignment_parse( mlt_properties_get( properties, "valign" ) );
898 static inline void inline_memcpy( uint8_t *dest, uint8_t *src, int length )
900 uint8_t *end = src + length;
908 mlt_frame composite_copy_region( mlt_transition this, mlt_frame a_frame, mlt_position frame_position )
910 // Create a frame to return
911 mlt_frame b_frame = mlt_frame_init( );
913 // Get the properties of the a frame
914 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
916 // Get the properties of the b frame
917 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
920 int position = position_calculate( this, frame_position );
922 // Get the unique id of the transition
923 char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
927 uint8_t *dest = NULL;
929 // Get the image and dimensions
930 uint8_t *image = mlt_properties_get_data( a_props, "image", NULL );
931 int width = mlt_properties_get_int( a_props, "width" );
932 int height = mlt_properties_get_int( a_props, "height" );
933 int format = mlt_properties_get_int( a_props, "format" );
935 // Pointers for copy operation
947 // Will need to know region to copy
948 struct geometry_s result;
950 // Calculate the region now
951 composite_calculate( this, &result, a_frame, position );
953 // Need to scale down to actual dimensions
954 x = rint( 0.5 + result.item.x * width / result.nw );
955 y = rint( 0.5 + result.item.y * height / result.nh );
956 w = rint( 0.5 + result.item.w * width / result.nw );
957 h = rint( 0.5 + result.item.h * height / result.nh );
966 sprintf( key, "%s.in=%d,%d,%d,%d,%f,%d,%d", name, x, y, w, h, result.item.mix, width, height );
967 mlt_properties_parse( a_props, key );
968 sprintf( key, "%s.out=%d,%d,%d,%d,%f,%d,%d", name, x, y, w, h, result.item.mix, width, height );
969 mlt_properties_parse( a_props, key );
974 // Now we need to create a new destination image
975 dest = mlt_pool_alloc( w * h * 2 );
977 // Assign to the new frame
978 mlt_properties_set_data( b_props, "image", dest, w * h * 2, mlt_pool_release, NULL );
979 mlt_properties_set_int( b_props, "width", w );
980 mlt_properties_set_int( b_props, "height", h );
981 mlt_properties_set_int( b_props, "format", format );
990 if ( y + h > height )
991 h -= ( y + h - height );
1000 if ( w > 0 && h > 0 )
1002 // Copy the region of the image
1003 p = image + y * ss + x * 2;
1007 inline_memcpy( dest, p, w * 2 );
1013 // Assign this position to the b frame
1014 mlt_frame_set_position( b_frame, frame_position );
1015 mlt_properties_set_int( b_props, "distort", 1 );
1024 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
1026 // Get the b frame from the stack
1027 mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
1029 // Get the transition from the a frame
1030 mlt_transition this = mlt_frame_pop_service( a_frame );
1033 double position = mlt_deque_pop_back_double( MLT_FRAME_IMAGE_STACK( a_frame ) );
1034 int out = mlt_frame_pop_service_int( a_frame );
1035 int in = mlt_frame_pop_service_int( a_frame );
1037 // Get the properties from the transition
1038 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
1040 // TODO: clean up always_active behaviour
1041 if ( mlt_properties_get_int( properties, "always_active" ) )
1043 mlt_events_block( properties, properties );
1044 mlt_properties_set_int( properties, "in", in );
1045 mlt_properties_set_int( properties, "out", out );
1046 mlt_events_unblock( properties, properties );
1049 // This compositer is yuv422 only
1050 *format = mlt_image_yuv422;
1052 if ( b_frame != NULL )
1054 // Get the properties of the a frame
1055 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
1057 // Get the properties of the b frame
1058 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
1060 // Structures for geometry
1061 struct geometry_s result;
1063 // Calculate the position
1064 double delta = delta_calculate( this, a_frame, position );
1066 // Get the image from the b frame
1067 uint8_t *image_b = NULL;
1068 int width_b = *width;
1069 int height_b = *height;
1072 uint8_t *alpha_a = NULL;
1073 uint8_t *alpha_b = NULL;
1075 // Composites always need scaling... defaulting to lowest
1076 char *rescale = mlt_properties_get( a_props, "rescale.interp" );
1077 if ( rescale == NULL || !strcmp( rescale, "none" ) )
1078 rescale = "nearest";
1079 mlt_properties_set( a_props, "rescale.interp", rescale );
1080 mlt_properties_set( b_props, "rescale.interp", rescale );
1082 // Do the calculation
1083 // NB: Locks needed here since the properties are being modified
1084 mlt_service_lock( MLT_TRANSITION_SERVICE( this ) );
1085 composite_calculate( this, &result, a_frame, position );
1086 mlt_service_unlock( MLT_TRANSITION_SERVICE( this ) );
1088 // Since we are the consumer of the b_frame, we must pass along these
1089 // consumer properties from the a_frame
1090 mlt_properties_set_double( b_props, "consumer_deinterlace", mlt_properties_get_double( a_props, "consumer_deinterlace" ) );
1091 mlt_properties_set( b_props, "consumer_deinterlace_method", mlt_properties_get( a_props, "consumer_deinterlace_method" ) );
1092 mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
1094 // TODO: Dangerous/temporary optimisation - if nothing to do, then do nothing
1095 if ( mlt_properties_get_int( properties, "no_alpha" ) &&
1096 result.item.x == 0 && result.item.y == 0 && result.item.w == *width && result.item.h == *height && result.item.mix == 100 )
1098 mlt_frame_get_image( b_frame, image, format, width, height, 1 );
1099 if ( !mlt_frame_is_test_card( a_frame ) )
1100 mlt_frame_replace_image( a_frame, *image, *format, *width, *height );
1104 if ( a_frame == b_frame )
1106 double aspect_ratio = mlt_frame_get_aspect_ratio( b_frame );
1107 get_b_frame_image( this, b_frame, &image_b, &width_b, &height_b, &result );
1108 alpha_b = mlt_frame_get_alpha_mask( b_frame );
1109 mlt_properties_set_double( a_props, "aspect_ratio", aspect_ratio );
1112 // Get the image from the a frame
1113 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
1114 alpha_a = mlt_frame_get_alpha_mask( a_frame );
1116 // Optimisation - no compositing required
1117 if ( result.item.mix == 0 || ( result.item.w == 0 && result.item.h == 0 ) )
1120 // Need to keep the width/height of the a_frame on the b_frame for titling
1121 if ( mlt_properties_get( a_props, "dest_width" ) == NULL )
1123 mlt_properties_set_int( a_props, "dest_width", *width );
1124 mlt_properties_set_int( a_props, "dest_height", *height );
1125 mlt_properties_set_int( b_props, "dest_width", *width );
1126 mlt_properties_set_int( b_props, "dest_height", *height );
1130 mlt_properties_set_int( b_props, "dest_width", mlt_properties_get_int( a_props, "dest_width" ) );
1131 mlt_properties_set_int( b_props, "dest_height", mlt_properties_get_int( a_props, "dest_height" ) );
1134 // Special case for titling...
1135 if ( mlt_properties_get_int( properties, "titles" ) )
1137 if ( mlt_properties_get( b_props, "rescale.interp" ) == NULL )
1138 mlt_properties_set( b_props, "rescale.interp", "hyper" );
1139 width_b = mlt_properties_get_int( a_props, "dest_width" );
1140 height_b = mlt_properties_get_int( a_props, "dest_height" );
1143 if ( *image != image_b && ( image_b != NULL || get_b_frame_image( this, b_frame, &image_b, &width_b, &height_b, &result ) == 0 ) )
1145 uint8_t *dest = *image;
1146 uint8_t *src = image_b;
1148 mlt_properties_get_int( a_props, "consumer_deinterlace" ) ||
1149 mlt_properties_get_int( properties, "progressive" );
1152 int32_t luma_softness = mlt_properties_get_double( properties, "softness" ) * ( 1 << 16 );
1153 uint16_t *luma_bitmap = get_luma( properties, width_b, height_b );
1154 char *operator = mlt_properties_get( properties, "operator" );
1156 alpha_b = alpha_b == NULL ? mlt_frame_get_alpha_mask( b_frame ) : alpha_b;
1158 composite_line_fn line_fn = composite_line_yuv;
1160 // Replacement and override
1161 if ( operator != NULL )
1163 if ( !strcmp( operator, "or" ) )
1164 line_fn = composite_line_yuv_or;
1165 if ( !strcmp( operator, "and" ) )
1166 line_fn = composite_line_yuv_and;
1167 if ( !strcmp( operator, "xor" ) )
1168 line_fn = composite_line_yuv_xor;
1171 // Allow the user to completely obliterate the alpha channels from both frames
1172 if ( mlt_properties_get( properties, "alpha_a" ) )
1173 memset( alpha_a, mlt_properties_get_int( properties, "alpha_a" ), *width * *height );
1175 if ( mlt_properties_get( properties, "alpha_b" ) )
1176 memset( alpha_b, mlt_properties_get_int( properties, "alpha_b" ), width_b * height_b );
1178 for ( field = 0; field < ( progressive ? 1 : 2 ); field++ )
1180 // Assume lower field (0) first
1181 double field_position = position + field * delta;
1183 // Do the calculation if we need to
1184 // NB: Locks needed here since the properties are being modified
1185 mlt_service_lock( MLT_TRANSITION_SERVICE( this ) );
1186 composite_calculate( this, &result, a_frame, field_position );
1187 mlt_service_unlock( MLT_TRANSITION_SERVICE( this ) );
1189 if ( mlt_properties_get_int( properties, "titles" ) )
1191 result.item.w = *width * ( result.item.w / result.nw );
1192 result.nw = result.item.w;
1193 result.item.h = *height * ( result.item.h / result.nh );
1194 result.nh = *height;
1195 result.sw = width_b;
1196 result.sh = height_b;
1200 alignment_calculate( &result );
1202 // Composite the b_frame on the a_frame
1203 composite_yuv( dest, *width, *height, src, width_b, height_b, alpha_b, alpha_a, result, progressive ? -1 : field, luma_bitmap, luma_softness, line_fn );
1209 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
1215 /** Composition transition processing.
1218 static mlt_frame composite_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame )
1220 // UGH - this is a TODO - find a more reliable means of obtaining in/out for the always_active case
1221 if ( mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "always_active" ) == 0 )
1223 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "in" ) );
1224 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "out" ) );
1225 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame ), position_calculate( this, mlt_frame_get_position( a_frame ) ) );
1229 mlt_properties props = mlt_properties_get_data( MLT_FRAME_PROPERTIES( b_frame ), "_producer", NULL );
1230 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "in" ) );
1231 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "out" ) );
1232 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame ), mlt_properties_get_int( props, "_frame" ) - mlt_properties_get_int( props, "in" ) );
1235 mlt_frame_push_service( a_frame, this );
1236 mlt_frame_push_frame( a_frame, b_frame );
1237 mlt_frame_push_get_image( a_frame, transition_get_image );
1241 /** Constructor for the filter.
1244 mlt_transition transition_composite_init( char *arg )
1246 mlt_transition this = calloc( sizeof( struct mlt_transition_s ), 1 );
1247 if ( this != NULL && mlt_transition_init( this, NULL ) == 0 )
1249 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
1251 this->process = composite_process;
1253 // Default starting motion and zoom
1254 mlt_properties_set( properties, "start", arg != NULL ? arg : "0,0:100%x100%" );
1257 mlt_properties_set( properties, "factory", "fezzik" );
1259 // Inform apps and framework that this is a video only transition
1260 mlt_properties_set_int( properties, "_transition_type", 1 );
1263 //mlt_properties_set_int( properties, "_MMX", composite_have_mmx() );