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 library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, 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
48 /** Parse the alignment properties into the geometry.
51 static int alignment_parse( char* align )
56 else if ( isdigit( align[ 0 ] ) )
58 else if ( align[ 0 ] == 'c' || align[ 0 ] == 'm' )
60 else if ( align[ 0 ] == 'r' || align[ 0 ] == 'b' )
66 /** Calculate real geometry.
69 static void geometry_calculate( mlt_transition this, struct geometry_s *output, double position )
71 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
72 mlt_geometry geometry = mlt_properties_get_data( properties, "geometries", NULL );
73 int mirror_off = mlt_properties_get_int( properties, "mirror_off" );
74 int repeat_off = mlt_properties_get_int( properties, "repeat_off" );
75 int length = mlt_geometry_get_length( geometry );
78 if ( !repeat_off && position >= length && length != 0 )
80 int section = position / length;
81 position -= section * length;
82 if ( !mirror_off && section % 2 == 1 )
83 position = length - position;
86 // Fetch the key for the position
87 mlt_geometry_fetch( geometry, &output->item, position );
90 static mlt_geometry transition_parse_keys( mlt_transition this, int normalised_width, int normalised_height )
92 // Loop variable for property interrogation
95 // Get the properties of the transition
96 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
98 // Create an empty geometries object
99 mlt_geometry geometry = mlt_geometry_init( );
101 // Get the in and out position
102 mlt_position in = mlt_transition_get_in( this );
103 mlt_position out = mlt_transition_get_out( this );
104 int length = out - in + 1;
105 double cycle = mlt_properties_get_double( properties, "cycle" );
107 // Get the new style geometry string
108 char *property = mlt_properties_get( properties, "geometry" );
110 // Allow a geometry repeat cycle
113 else if ( cycle > 0 )
116 // Parse the geometry if we have one
117 mlt_geometry_parse( geometry, property, length, normalised_width, normalised_height );
119 // Check if we're using the old style geometry
120 if ( property == NULL )
122 // DEPRECATED: Multiple keys for geometry information is inefficient and too rigid for
123 // practical use - while deprecated, it has been slightly extended too - keys can now
124 // be specified out of order, and can be blanked or NULL to simulate removal
126 // Structure to use for parsing and inserting
127 struct mlt_geometry_item_s item;
129 // Parse the start property
131 if ( mlt_geometry_parse_item( geometry, &item, mlt_properties_get( properties, "start" ) ) == 0 )
132 mlt_geometry_insert( geometry, &item );
134 // Parse the keys in between
135 for ( i = 0; i < mlt_properties_count( properties ); i ++ )
137 // Get the name of the property
138 char *name = mlt_properties_get_name( properties, i );
140 // Check that it's valid
141 if ( !strncmp( name, "key[", 4 ) )
143 // Get the value of the property
144 char *value = mlt_properties_get_value( properties, i );
146 // Determine the frame number
147 item.frame = atoi( name + 4 );
149 // Parse and add to the list
150 if ( mlt_geometry_parse_item( geometry, &item, value ) == 0 )
151 mlt_geometry_insert( geometry, &item );
153 fprintf( stderr, "Invalid Key - skipping %s = %s\n", name, value );
159 if ( mlt_geometry_parse_item( geometry, &item, mlt_properties_get( properties, "end" ) ) == 0 )
160 mlt_geometry_insert( geometry, &item );
166 /** Adjust position according to scaled size and alignment properties.
169 static void alignment_calculate( struct geometry_s *geometry )
171 geometry->item.x += ( geometry->item.w - geometry->sw ) * geometry->halign / 2;
172 geometry->item.y += ( geometry->item.h - geometry->sh ) * geometry->valign / 2;
175 /** Calculate the position for this frame.
178 static int position_calculate( mlt_transition this, mlt_position position )
180 // Get the in and out position
181 mlt_position in = mlt_transition_get_in( this );
184 return position - in;
187 /** Calculate the field delta for this frame - position between two frames.
190 static inline double delta_calculate( mlt_transition this, mlt_frame frame, mlt_position position )
192 // Get the in and out position
193 mlt_position in = mlt_transition_get_in( this );
194 mlt_position out = mlt_transition_get_out( this );
195 double length = out - in + 1;
198 double x = ( double )( position - in ) / length;
199 double y = ( double )( position + 1 - in ) / length;
201 return length * ( y - x ) / 2.0;
204 static int get_value( mlt_properties properties, char *preferred, char *fallback )
206 int value = mlt_properties_get_int( properties, preferred );
208 value = mlt_properties_get_int( properties, fallback );
212 /** A linear threshold determination function.
215 static inline int32_t linearstep( int32_t edge1, int32_t edge2, int32_t a )
223 return ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
226 /** A smoother, non-linear threshold determination function.
229 static inline int32_t smoothstep( int32_t edge1, int32_t edge2, uint32_t a )
237 a = ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
239 return ( ( ( a * a ) >> 16 ) * ( ( 3 << 16 ) - ( 2 * a ) ) ) >> 16;
242 /** Load the luma map from PGM stream.
245 static void luma_read_pgm( FILE *f, uint16_t **map, int *width, int *height )
247 uint8_t *data = NULL;
259 // get the magic code
260 if ( fgets( line, 127, f ) == NULL )
264 while ( sscanf( line, " #%s", comment ) > 0 )
265 if ( fgets( line, 127, f ) == NULL )
268 if ( line[0] != 'P' || line[1] != '5' )
271 // skip white space and see if a new line must be fetched
272 for ( i = 2; i < 127 && line[i] != '\0' && isspace( line[i] ); i++ );
273 if ( ( line[i] == '\0' || line[i] == '#' ) && fgets( line, 127, f ) == NULL )
277 while ( sscanf( line, " #%s", comment ) > 0 )
278 if ( fgets( line, 127, f ) == NULL )
281 // get the dimensions
282 if ( line[0] == 'P' )
283 i = sscanf( line, "P5 %d %d %d", width, height, &maxval );
285 i = sscanf( line, "%d %d %d", width, height, &maxval );
287 // get the height value, if not yet
290 if ( fgets( line, 127, f ) == NULL )
294 while ( sscanf( line, " #%s", comment ) > 0 )
295 if ( fgets( line, 127, f ) == NULL )
298 i = sscanf( line, "%d", height );
305 // get the maximum gray value, if not yet
308 if ( fgets( line, 127, f ) == NULL )
312 while ( sscanf( line, " #%s", comment ) > 0 )
313 if ( fgets( line, 127, f ) == NULL )
316 i = sscanf( line, "%d", &maxval );
321 // determine if this is one or two bytes per pixel
322 bpp = maxval > 255 ? 2 : 1;
324 // allocate temporary storage for the raw data
325 data = mlt_pool_alloc( *width * *height * bpp );
330 if ( fread( data, *width * *height * bpp, 1, f ) != 1 )
333 // allocate the luma bitmap
334 *map = p = (uint16_t*)mlt_pool_alloc( *width * *height * sizeof( uint16_t ) );
338 // proces the raw data into the luma bitmap
339 for ( i = 0; i < *width * *height * bpp; i += bpp )
342 *p++ = data[ i ] << 8;
344 *p++ = ( data[ i ] << 8 ) + data[ i + 1 ];
351 mlt_pool_release( data );
354 /** Generate a luma map from any YUV image.
357 static void luma_read_yuv422( uint8_t *image, uint16_t **map, int width, int height )
361 // allocate the luma bitmap
362 uint16_t *p = *map = ( uint16_t* )mlt_pool_alloc( width * height * sizeof( uint16_t ) );
366 // proces the image data into the luma bitmap
367 for ( i = 0; i < width * height * 2; i += 2 )
368 *p++ = ( image[ i ] - 16 ) * 299; // 299 = 65535 / 219
371 static inline int calculate_mix( uint16_t *luma, int j, int soft, int weight, int alpha )
373 return ( ( ( luma == NULL ) ? weight : smoothstep( luma[ j ], luma[ j ] + soft, weight + soft ) ) * alpha ) >> 8;
376 static inline uint8_t sample_mix( uint8_t dest, uint8_t src, int mix )
378 return ( src * mix + dest * ( ( 1 << 16 ) - mix ) ) >> 16;
381 /** Composite a source line over a destination line
384 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 soft )
389 for ( j = 0; j < width; j ++ )
391 mix = calculate_mix( luma, j, soft, weight, *alpha_b ++ );
392 *dest = sample_mix( *dest, *src++, mix );
394 *dest = sample_mix( *dest, *src++, mix );
396 *alpha_a = ( mix >> 8 ) | *alpha_a;
401 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 soft )
406 for ( j = 0; j < width; j ++ )
408 mix = calculate_mix( luma, j, soft, weight, *alpha_b ++ | *alpha_a );
409 *dest = sample_mix( *dest, *src++, mix );
411 *dest = sample_mix( *dest, *src++, mix );
413 *alpha_a ++ = mix >> 8;
417 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 soft )
422 for ( j = 0; j < width; j ++ )
424 mix = calculate_mix( luma, j, soft, weight, *alpha_b ++ & *alpha_a );
425 *dest = sample_mix( *dest, *src++, mix );
427 *dest = sample_mix( *dest, *src++, mix );
429 *alpha_a ++ = mix >> 8;
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 soft )
438 for ( j = 0; j < width; j ++ )
440 mix = calculate_mix( luma, j, soft, weight, *alpha_b ++ ^ *alpha_a );
441 *dest = sample_mix( *dest, *src++, mix );
443 *dest = sample_mix( *dest, *src++, mix );
445 *alpha_a ++ = mix >> 8;
449 /** Composite function.
452 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 )
456 int x_src = -geometry.x_src, y_src = -geometry.y_src;
457 int uneven_x_src = ( x_src % 2 );
458 int32_t weight = ( ( 1 << 16 ) - 1 ) * ( geometry.item.mix / 100 );
459 int step = ( field > -1 ) ? 2 : 1;
461 int stride_src = geometry.sw * bpp;
462 int stride_dest = width_dest * bpp;
464 // Adjust to consumer scale
465 int x = rint( geometry.item.x * width_dest / geometry.nw );
466 int y = rint( geometry.item.y * height_dest / geometry.nh );
467 int uneven_x = ( x % 2 );
469 // optimization points - no work to do
470 if ( width_src <= 0 || height_src <= 0 || y_src >= height_src || x_src >= width_src )
473 if ( ( x < 0 && -x >= width_src ) || ( y < 0 && -y >= height_src ) )
476 // cropping affects the source width
480 // and it implies cropping
481 if ( width_src > geometry.item.w )
482 width_src = geometry.item.w;
485 // cropping affects the source height
489 // and it implies cropping
490 if ( height_src > geometry.item.h )
491 height_src = geometry.item.h;
494 // crop overlay off the left edge of frame
502 // crop overlay beyond right edge of frame
503 if ( x + width_src > width_dest )
504 width_src = width_dest - x;
506 // crop overlay off the top edge of the frame
514 // crop overlay below bottom edge of frame
515 if ( y + height_src > height_dest )
516 height_src = height_dest - y;
518 // offset pointer into overlay buffer based on cropping
519 p_src += x_src * bpp + y_src * stride_src;
521 // offset pointer into frame buffer based upon positive coordinates only!
522 p_dest += ( x < 0 ? 0 : x ) * bpp + ( y < 0 ? 0 : y ) * stride_dest;
524 // offset pointer into alpha channel based upon cropping
525 alpha_b += x_src + y_src * stride_src / bpp;
526 alpha_a += x + y * stride_dest / bpp;
528 // offset pointer into luma channel based upon cropping
530 p_luma += x_src + y_src * stride_src / bpp;
532 // Assuming lower field first
533 // Special care is taken to make sure the b_frame is aligned to the correct field.
534 // field 0 = lower field and y should be odd (y is 0-based).
535 // field 1 = upper field and y should be even.
536 if ( ( field > -1 ) && ( y % 2 == field ) )
538 if ( ( field == 1 && y < height_dest - 1 ) || ( field == 0 && y == 0 ) )
539 p_dest += stride_dest;
541 p_dest -= stride_dest;
544 // On the second field, use the other lines from b_frame
548 alpha_b += stride_src / bpp;
549 alpha_a += stride_dest / bpp;
555 int alpha_b_stride = stride_src / bpp;
556 int alpha_a_stride = stride_dest / bpp;
558 // Align chroma of source and destination
559 if ( uneven_x != uneven_x_src )
566 // now do the compositing only to cropped extents
567 for ( i = 0; i < height_src; i += step )
569 line_fn( p_dest, p_src, width_src, alpha_b, alpha_a, weight, p_luma, softness );
572 p_dest += stride_dest;
573 alpha_b += alpha_b_stride;
574 alpha_a += alpha_a_stride;
576 p_luma += alpha_b_stride;
583 /** Scale 16bit greyscale luma map using nearest neighbor.
587 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 )
590 register int x_step = ( src_width << 16 ) / dest_width;
591 register int y_step = ( src_height << 16 ) / dest_height;
592 register int x, y = 0;
594 for ( i = 0; i < dest_height; i++ )
596 const uint16_t *src = src_buf + ( y >> 16 ) * src_width;
599 for ( j = 0; j < dest_width; j++ )
601 *dest_buf++ = src[ x >> 16 ] ^ invert;
608 static uint16_t* get_luma( mlt_transition this, mlt_properties properties, int width, int height )
610 // The cached luma map information
611 int luma_width = mlt_properties_get_int( properties, "_luma.width" );
612 int luma_height = mlt_properties_get_int( properties, "_luma.height" );
613 uint16_t *luma_bitmap = mlt_properties_get_data( properties, "_luma.bitmap", NULL );
614 int invert = mlt_properties_get_int( properties, "luma_invert" );
616 // If the filename property changed, reload the map
617 char *resource = mlt_properties_get( properties, "luma" );
621 if ( luma_width == 0 || luma_height == 0 )
624 luma_height = height;
627 if ( resource != NULL && strchr( resource, '%' ) )
629 // TODO: Clean up quick and dirty compressed/existence check
631 sprintf( temp, "%s/lumas/%s/%s", mlt_environment( "MLT_DATA" ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource, '%' ) + 1 );
632 test = fopen( temp, "r" );
634 strcat( temp, ".png" );
640 if ( resource != NULL && ( luma_bitmap == NULL || luma_width != width || luma_height != height ) )
642 uint16_t *orig_bitmap = mlt_properties_get_data( properties, "_luma.orig_bitmap", NULL );
643 luma_width = mlt_properties_get_int( properties, "_luma.orig_width" );
644 luma_height = mlt_properties_get_int( properties, "_luma.orig_height" );
646 // Load the original luma once
647 if ( orig_bitmap == NULL )
649 char *extension = strrchr( resource, '.' );
651 // See if it is a PGM
652 if ( extension != NULL && strcmp( extension, ".pgm" ) == 0 )
655 FILE *f = fopen( resource, "r" );
659 luma_read_pgm( f, &orig_bitmap, &luma_width, &luma_height );
662 // Remember the original size for subsequent scaling
663 mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
664 mlt_properties_set_int( properties, "_luma.orig_width", luma_width );
665 mlt_properties_set_int( properties, "_luma.orig_height", luma_height );
670 // Get the factory producer service
671 char *factory = mlt_properties_get( properties, "factory" );
673 // Create the producer
674 mlt_profile profile = mlt_service_profile( MLT_TRANSITION_SERVICE( this ) );
675 mlt_producer producer = mlt_factory_producer( profile, factory, resource );
678 if ( producer != NULL )
680 // Get the producer properties
681 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
683 // Ensure that we loop
684 mlt_properties_set( producer_properties, "eof", "loop" );
686 // Now pass all producer. properties on the transition down
687 mlt_properties_pass( producer_properties, properties, "luma." );
689 // We will get the alpha frame from the producer
690 mlt_frame luma_frame = NULL;
692 // Get the luma frame
693 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &luma_frame, 0 ) == 0 )
696 mlt_image_format luma_format = mlt_image_yuv422;
698 // Get image from the luma producer
699 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame ), "rescale.interp", "none" );
700 mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 );
702 // Generate the luma map
703 if ( luma_image != NULL && luma_format == mlt_image_yuv422 )
704 luma_read_yuv422( luma_image, &orig_bitmap, luma_width, luma_height );
706 // Remember the original size for subsequent scaling
707 mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
708 mlt_properties_set_int( properties, "_luma.orig_width", luma_width );
709 mlt_properties_set_int( properties, "_luma.orig_height", luma_height );
711 // Cleanup the luma frame
712 mlt_frame_close( luma_frame );
715 // Cleanup the luma producer
716 mlt_producer_close( producer );
721 luma_bitmap = mlt_pool_alloc( width * height * sizeof( uint16_t ) );
722 scale_luma( luma_bitmap, width, height, orig_bitmap, luma_width, luma_height, invert * ( ( 1 << 16 ) - 1 ) );
724 // Remember the scaled luma size to prevent unnecessary scaling
725 mlt_properties_set_int( properties, "_luma.width", width );
726 mlt_properties_set_int( properties, "_luma.height", height );
727 mlt_properties_set_data( properties, "_luma.bitmap", luma_bitmap, width * height * 2, mlt_pool_release, NULL );
732 /** Get the properly sized image from b_frame.
735 static int get_b_frame_image( mlt_transition this, mlt_frame b_frame, uint8_t **image, int *width, int *height, struct geometry_s *geometry )
738 mlt_image_format format = mlt_image_yuv422;
740 // Get the properties objects
741 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
742 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
743 uint8_t resize_alpha = mlt_properties_get_int( b_props, "resize_alpha" );
745 // Do not scale if we are cropping - the compositing rectangle can crop the b image
746 // TODO: Use the animatable w and h of the crop geometry to scale independently of crop rectangle
747 if ( mlt_properties_get( properties, "crop" ) )
749 int real_width = get_value( b_props, "real_width", "width" );
750 int real_height = get_value( b_props, "real_height", "height" );
751 double input_ar = mlt_properties_get_double( b_props, "aspect_ratio" );
752 double consumer_ar = mlt_properties_get_double( b_props, "consumer_aspect_ratio" );
753 double background_ar = mlt_properties_get_double( b_props, "output_ratio" );
754 double output_ar = background_ar != 0.0 ? background_ar : consumer_ar;
755 int scaled_width = rint( ( input_ar == 0.0 ? output_ar : input_ar ) / output_ar * real_width );
756 int scaled_height = real_height;
757 geometry->sw = scaled_width;
758 geometry->sh = scaled_height;
760 // Normalise aspect ratios and scale preserving aspect ratio
761 else if ( mlt_properties_get_int( properties, "aligned" ) && mlt_properties_get_int( properties, "distort" ) == 0 && mlt_properties_get_int( b_props, "distort" ) == 0 && geometry->item.distort == 0 )
763 // Adjust b_frame pixel aspect
764 int normalised_width = geometry->item.w;
765 int normalised_height = geometry->item.h;
766 int real_width = get_value( b_props, "real_width", "width" );
767 int real_height = get_value( b_props, "real_height", "height" );
768 double input_ar = mlt_properties_get_double( b_props, "aspect_ratio" );
769 double consumer_ar = mlt_properties_get_double( b_props, "consumer_aspect_ratio" );
770 double background_ar = mlt_properties_get_double( b_props, "output_ratio" );
771 double output_ar = background_ar != 0.0 ? background_ar : consumer_ar;
772 int scaled_width = rint( ( input_ar == 0.0 ? output_ar : input_ar ) / output_ar * real_width );
773 int scaled_height = real_height;
774 // fprintf(stderr, "%s: scaled %dx%d norm %dx%d real %dx%d output_ar %f => %f\n", __FILE__,
775 // scaled_width, scaled_height, normalised_width, normalised_height, real_width, real_height,
776 // background_ar, output_ar);
778 // Now ensure that our images fit in the normalised frame
779 if ( scaled_width > normalised_width )
781 scaled_height = rint( scaled_height * normalised_width / scaled_width );
782 scaled_width = normalised_width;
784 if ( scaled_height > normalised_height )
786 scaled_width = rint( scaled_width * normalised_height / scaled_height );
787 scaled_height = normalised_height;
790 // Honour the fill request - this will scale the image to fill width or height while maintaining a/r
791 // ????: Shouln't this be the default behaviour?
792 if ( mlt_properties_get_int( properties, "fill" ) && scaled_width > 0 && scaled_height > 0 )
794 if ( scaled_height < normalised_height && scaled_width * normalised_height / scaled_height <= normalised_width )
796 scaled_width = rint( scaled_width * normalised_height / scaled_height );
797 scaled_height = normalised_height;
799 else if ( scaled_width < normalised_width && scaled_height * normalised_width / scaled_width < normalised_height )
801 scaled_height = rint( scaled_height * normalised_width / scaled_width );
802 scaled_width = normalised_width;
806 // Save the new scaled dimensions
807 geometry->sw = scaled_width;
808 geometry->sh = scaled_height;
812 geometry->sw = geometry->item.w;
813 geometry->sh = geometry->item.h;
816 // We want to ensure that we bypass resize now...
817 if ( resize_alpha == 0 )
818 mlt_properties_set_int( b_props, "distort", mlt_properties_get_int( properties, "distort" ) );
820 // If we're not aligned, we want a non-transparent background
821 if ( mlt_properties_get_int( properties, "aligned" ) == 0 )
822 mlt_properties_set_int( b_props, "resize_alpha", 255 );
824 // Take into consideration alignment for optimisation (titles are a special case)
825 if ( !mlt_properties_get_int( properties, "titles" ) &&
826 mlt_properties_get( properties, "crop" ) == NULL )
827 alignment_calculate( geometry );
829 // Adjust to consumer scale
830 *width = rint( geometry->sw * *width / geometry->nw );
831 *height = rint( geometry->sh * *height / geometry->nh );
832 // fprintf(stderr, "%s: scaled %dx%d norm %dx%d resize %dx%d\n", __FILE__,
833 // geometry->sw, geometry->sh, geometry->nw, geometry->nh, *width, *height);
835 ret = mlt_frame_get_image( b_frame, image, &format, width, height, 1 );
837 // Set the frame back
838 mlt_properties_set_int( b_props, "resize_alpha", resize_alpha );
840 return ret && image != NULL;
843 static void crop_calculate( mlt_transition this, mlt_properties properties, struct geometry_s *result, double position )
845 // Initialize panning info
848 if ( mlt_properties_get( properties, "crop" ) )
850 mlt_geometry crop = mlt_properties_get_data( properties, "crop_geometry", NULL );
853 crop = mlt_geometry_init();
854 mlt_position in = mlt_transition_get_in( this );
855 mlt_position out = mlt_transition_get_out( this );
856 int length = out - in + 1;
857 double cycle = mlt_properties_get_double( properties, "cycle" );
859 // Allow a geometry repeat cycle
862 else if ( cycle > 0 )
864 mlt_geometry_parse( crop, mlt_properties_get( properties, "crop" ), length, result->sw, result->sh );
865 mlt_properties_set_data( properties, "crop_geometry", crop, 0, (mlt_destructor)mlt_geometry_close, NULL );
869 int length = mlt_geometry_get_length( crop );
870 int mirror_off = mlt_properties_get_int( properties, "mirror_off" );
871 int repeat_off = mlt_properties_get_int( properties, "repeat_off" );
872 if ( !repeat_off && position >= length && length != 0 )
874 int section = position / length;
875 position -= section * length;
876 if ( !mirror_off && section % 2 == 1 )
877 position = length - position;
881 struct mlt_geometry_item_s crop_item;
882 mlt_geometry_fetch( crop, &crop_item, position );
883 result->x_src = rint( crop_item.x );
884 result->y_src = rint( crop_item.y );
888 static mlt_geometry composite_calculate( mlt_transition this, struct geometry_s *result, mlt_frame a_frame, double position )
890 // Get the properties from the transition
891 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
893 // Get the properties from the frame
894 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
896 // Structures for geometry
897 mlt_geometry start = mlt_properties_get_data( properties, "geometries", NULL );
899 // Obtain the normalised width and height from the a_frame
900 int normalised_width = mlt_properties_get_int( a_props, "normalised_width" );
901 int normalised_height = mlt_properties_get_int( a_props, "normalised_height" );
903 char *name = mlt_properties_get( properties, "_unique_id" );
906 sprintf( key, "%s.in", name );
907 if ( mlt_properties_get( a_props, key ) )
909 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 );
913 // Now parse the geometries
916 // Parse the transitions properties
917 start = transition_parse_keys( this, normalised_width, normalised_height );
919 // Assign to properties to ensure we get destroyed
920 mlt_properties_set_data( properties, "geometries", start, 0, ( mlt_destructor )mlt_geometry_close, NULL );
924 int length = mlt_transition_get_out( this ) - mlt_transition_get_in( this ) + 1;
925 double cycle = mlt_properties_get_double( properties, "cycle" );
928 else if ( cycle > 0 )
930 mlt_geometry_refresh( start, mlt_properties_get( properties, "geometry" ), length, normalised_width, normalised_height );
933 // Do the calculation
934 geometry_calculate( this, result, position );
936 // Assign normalised info
937 result->nw = normalised_width;
938 result->nh = normalised_height;
941 // Now parse the alignment
942 result->halign = alignment_parse( mlt_properties_get( properties, "halign" ) );
943 result->valign = alignment_parse( mlt_properties_get( properties, "valign" ) );
945 crop_calculate( this, properties, result, position );
950 mlt_frame composite_copy_region( mlt_transition this, mlt_frame a_frame, mlt_position frame_position )
952 // Create a frame to return
953 mlt_frame b_frame = mlt_frame_init( MLT_TRANSITION_SERVICE( this ) );
955 // Get the properties of the a frame
956 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
958 // Get the properties of the b frame
959 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
962 int position = position_calculate( this, frame_position );
964 // Get the unique id of the transition
965 char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
969 uint8_t *dest = NULL;
971 // Get the image and dimensions
972 uint8_t *image = mlt_properties_get_data( a_props, "image", NULL );
973 int width = mlt_properties_get_int( a_props, "width" );
974 int height = mlt_properties_get_int( a_props, "height" );
975 int format = mlt_properties_get_int( a_props, "format" );
977 // Pointers for copy operation
989 // Will need to know region to copy
990 struct geometry_s result;
992 // Calculate the region now
993 composite_calculate( this, &result, a_frame, position );
995 // Need to scale down to actual dimensions
996 x = rint( result.item.x * width / result.nw );
997 y = rint( result.item.y * height / result.nh );
998 w = rint( result.item.w * width / result.nw );
999 h = rint( result.item.h * height / result.nh );
1008 sprintf( key, "%s.in=%d,%d,%d,%d,%f,%d,%d", name, x, y, w, h, result.item.mix, width, height );
1009 mlt_properties_parse( a_props, key );
1010 sprintf( key, "%s.out=%d,%d,%d,%d,%f,%d,%d", name, x, y, w, h, result.item.mix, width, height );
1011 mlt_properties_parse( a_props, key );
1016 // Now we need to create a new destination image
1017 dest = mlt_pool_alloc( w * h * 2 );
1019 // Assign to the new frame
1020 mlt_properties_set_data( b_props, "image", dest, w * h * 2, mlt_pool_release, NULL );
1021 mlt_properties_set_int( b_props, "width", w );
1022 mlt_properties_set_int( b_props, "height", h );
1023 mlt_properties_set_int( b_props, "format", format );
1027 dest += ( ds * -y );
1032 if ( y + h > height )
1033 h -= ( y + h - height );
1042 if ( w > 0 && h > 0 )
1044 // Copy the region of the image
1045 p = image + y * ss + x * 2;
1049 memcpy( dest, p, w * 2 );
1055 // Assign this position to the b frame
1056 mlt_frame_set_position( b_frame, frame_position );
1057 mlt_properties_set_int( b_props, "distort", 1 );
1066 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
1068 // Get the b frame from the stack
1069 mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
1071 // Get the transition from the a frame
1072 mlt_transition this = mlt_frame_pop_service( a_frame );
1075 double position = mlt_deque_pop_back_double( MLT_FRAME_IMAGE_STACK( a_frame ) );
1076 int out = mlt_frame_pop_service_int( a_frame );
1077 int in = mlt_frame_pop_service_int( a_frame );
1079 // Get the properties from the transition
1080 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
1082 // TODO: clean up always_active behaviour
1083 if ( mlt_properties_get_int( properties, "always_active" ) )
1085 mlt_events_block( properties, properties );
1086 mlt_properties_set_int( properties, "in", in );
1087 mlt_properties_set_int( properties, "out", out );
1088 mlt_events_unblock( properties, properties );
1091 // This compositer is yuv422 only
1092 *format = mlt_image_yuv422;
1094 if ( b_frame != NULL )
1096 // Get the properties of the a frame
1097 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
1099 // Get the properties of the b frame
1100 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
1102 // Structures for geometry
1103 struct geometry_s result;
1105 // Calculate the position
1106 double delta = delta_calculate( this, a_frame, position );
1108 // Get the image from the b frame
1109 uint8_t *image_b = NULL;
1110 int width_b = *width;
1111 int height_b = *height;
1114 uint8_t *alpha_a = NULL;
1115 uint8_t *alpha_b = NULL;
1117 // Composites always need scaling... defaulting to lowest
1118 char *rescale = mlt_properties_get( a_props, "rescale.interp" );
1119 if ( rescale == NULL || !strcmp( rescale, "none" ) )
1120 rescale = "nearest";
1121 mlt_properties_set( a_props, "rescale.interp", rescale );
1122 mlt_properties_set( b_props, "rescale.interp", rescale );
1124 // Do the calculation
1125 // NB: Locks needed here since the properties are being modified
1126 mlt_service_lock( MLT_TRANSITION_SERVICE( this ) );
1127 composite_calculate( this, &result, a_frame, position );
1128 mlt_service_unlock( MLT_TRANSITION_SERVICE( this ) );
1130 // Since we are the consumer of the b_frame, we must pass along these
1131 // consumer properties from the a_frame
1132 mlt_properties_set_int( b_props, "consumer_deinterlace", mlt_properties_get_int( a_props, "consumer_deinterlace" ) || mlt_properties_get_int( properties, "deinterlace" ) );
1133 mlt_properties_set( b_props, "consumer_deinterlace_method", mlt_properties_get( a_props, "consumer_deinterlace_method" ) );
1134 mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
1136 // TODO: Dangerous/temporary optimisation - if nothing to do, then do nothing
1137 if ( mlt_properties_get_int( properties, "no_alpha" ) &&
1138 result.item.x == 0 && result.item.y == 0 && result.item.w == *width && result.item.h == *height && result.item.mix == 100 )
1140 mlt_frame_get_image( b_frame, image, format, width, height, 1 );
1141 if ( !mlt_frame_is_test_card( a_frame ) )
1142 mlt_frame_replace_image( a_frame, *image, *format, *width, *height );
1146 if ( a_frame == b_frame )
1148 double aspect_ratio = mlt_frame_get_aspect_ratio( b_frame );
1149 get_b_frame_image( this, b_frame, &image_b, &width_b, &height_b, &result );
1150 alpha_b = mlt_frame_get_alpha_mask( b_frame );
1151 mlt_properties_set_double( a_props, "aspect_ratio", aspect_ratio );
1154 // Get the image from the a frame
1155 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
1156 alpha_a = mlt_frame_get_alpha_mask( a_frame );
1158 // Optimisation - no compositing required
1159 if ( result.item.mix == 0 || ( result.item.w == 0 && result.item.h == 0 ) )
1162 // Need to keep the width/height of the a_frame on the b_frame for titling
1163 if ( mlt_properties_get( a_props, "dest_width" ) == NULL )
1165 mlt_properties_set_int( a_props, "dest_width", *width );
1166 mlt_properties_set_int( a_props, "dest_height", *height );
1167 mlt_properties_set_int( b_props, "dest_width", *width );
1168 mlt_properties_set_int( b_props, "dest_height", *height );
1172 mlt_properties_set_int( b_props, "dest_width", mlt_properties_get_int( a_props, "dest_width" ) );
1173 mlt_properties_set_int( b_props, "dest_height", mlt_properties_get_int( a_props, "dest_height" ) );
1176 // Special case for titling...
1177 if ( mlt_properties_get_int( properties, "titles" ) )
1179 if ( mlt_properties_get( b_props, "rescale.interp" ) == NULL )
1180 mlt_properties_set( b_props, "rescale.interp", "hyper" );
1181 width_b = mlt_properties_get_int( a_props, "dest_width" );
1182 height_b = mlt_properties_get_int( a_props, "dest_height" );
1185 if ( *image != image_b && ( image_b != NULL || get_b_frame_image( this, b_frame, &image_b, &width_b, &height_b, &result ) == 0 ) )
1187 uint8_t *dest = *image;
1188 uint8_t *src = image_b;
1190 mlt_properties_get_int( a_props, "consumer_deinterlace" ) ||
1191 mlt_properties_get_int( properties, "progressive" );
1194 int32_t luma_softness = mlt_properties_get_double( properties, "softness" ) * ( 1 << 16 );
1195 uint16_t *luma_bitmap = get_luma( this, properties, width_b, height_b );
1196 char *operator = mlt_properties_get( properties, "operator" );
1198 alpha_b = alpha_b == NULL ? mlt_frame_get_alpha_mask( b_frame ) : alpha_b;
1200 composite_line_fn line_fn = composite_line_yuv;
1202 // Replacement and override
1203 if ( operator != NULL )
1205 if ( !strcmp( operator, "or" ) )
1206 line_fn = composite_line_yuv_or;
1207 if ( !strcmp( operator, "and" ) )
1208 line_fn = composite_line_yuv_and;
1209 if ( !strcmp( operator, "xor" ) )
1210 line_fn = composite_line_yuv_xor;
1213 // Allow the user to completely obliterate the alpha channels from both frames
1214 if ( mlt_properties_get( properties, "alpha_a" ) )
1215 memset( alpha_a, mlt_properties_get_int( properties, "alpha_a" ), *width * *height );
1217 if ( mlt_properties_get( properties, "alpha_b" ) )
1218 memset( alpha_b, mlt_properties_get_int( properties, "alpha_b" ), width_b * height_b );
1220 for ( field = 0; field < ( progressive ? 1 : 2 ); field++ )
1222 // Assume lower field (0) first
1223 double field_position = position + field * delta;
1225 // Do the calculation if we need to
1226 // NB: Locks needed here since the properties are being modified
1227 mlt_service_lock( MLT_TRANSITION_SERVICE( this ) );
1228 composite_calculate( this, &result, a_frame, field_position );
1229 mlt_service_unlock( MLT_TRANSITION_SERVICE( this ) );
1231 if ( mlt_properties_get_int( properties, "titles" ) )
1233 result.item.w = rint( *width * ( result.item.w / result.nw ) );
1234 result.nw = result.item.w;
1235 result.item.h = rint( *height * ( result.item.h / result.nh ) );
1236 result.nh = *height;
1237 result.sw = width_b;
1238 result.sh = height_b;
1242 if ( mlt_properties_get( properties, "crop" ) )
1244 if ( result.x_src == 0 )
1245 width_b = width_b > result.item.w ? result.item.w : width_b;
1246 if ( result.y_src == 0 )
1247 height_b = height_b > result.item.h ? result.item.h : height_b;
1252 alignment_calculate( &result );
1255 // Composite the b_frame on the a_frame
1256 composite_yuv( dest, *width, *height, src, width_b, height_b, alpha_b, alpha_a, result, progressive ? -1 : field, luma_bitmap, luma_softness, line_fn );
1262 mlt_frame_get_image( a_frame, image, format, width, height, 1 );
1268 /** Composition transition processing.
1271 static mlt_frame composite_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame )
1273 // UGH - this is a TODO - find a more reliable means of obtaining in/out for the always_active case
1274 if ( mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "always_active" ) == 0 )
1276 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "in" ) );
1277 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "out" ) );
1278 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame ), position_calculate( this, mlt_frame_get_position( a_frame ) ) );
1282 mlt_properties props = mlt_properties_get_data( MLT_FRAME_PROPERTIES( b_frame ), "_producer", NULL );
1283 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "in" ) );
1284 mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "out" ) );
1285 mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame ), mlt_properties_get_int( props, "_frame" ) - mlt_properties_get_int( props, "in" ) );
1288 mlt_frame_push_service( a_frame, this );
1289 mlt_frame_push_frame( a_frame, b_frame );
1290 mlt_frame_push_get_image( a_frame, transition_get_image );
1294 /** Constructor for the filter.
1297 mlt_transition transition_composite_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
1299 mlt_transition this = calloc( sizeof( struct mlt_transition_s ), 1 );
1300 if ( this != NULL && mlt_transition_init( this, NULL ) == 0 )
1302 mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
1304 this->process = composite_process;
1306 // Default starting motion and zoom
1307 mlt_properties_set( properties, "start", arg != NULL ? arg : "0,0:100%x100%" );
1310 mlt_properties_set( properties, "factory", "fezzik" );
1312 // Use alignment (and hence alpha of b frame)
1313 mlt_properties_set_int( properties, "aligned", 1 );
1315 // Inform apps and framework that this is a video only transition
1316 mlt_properties_set_int( properties, "_transition_type", 1 );