2 * transition_luma.c -- a generic dissolve/wipe processor
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Dan Dennedy <dan@dennedy.org>
6 * Adapted from Kino Plugin Timfx, which is
7 * Copyright (C) 2002 Timothy M. Shead <tshead@k-3d.com>
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <framework/mlt.h>
32 static inline int dissolve_yuv( mlt_frame this, mlt_frame that, float weight, int width, int height )
35 int width_src = width, height_src = height;
36 mlt_image_format format = mlt_image_yuv422;
37 uint8_t *p_src, *p_dest;
43 int32_t weigh = weight * ( 1 << 16 );
44 int32_t weigh_complement = ( 1 - weight ) * ( 1 << 16 );
46 if ( mlt_properties_get( &this->parent, "distort" ) )
47 mlt_properties_set( &that->parent, "distort", mlt_properties_get( &this->parent, "distort" ) );
48 mlt_properties_set_int( &that->parent, "consumer_deinterlace", mlt_properties_get_int( &this->parent, "consumer_deinterlace" ) );
49 mlt_frame_get_image( this, &p_dest, &format, &width, &height, 1 );
50 alpha_dst = mlt_frame_get_alpha_mask( this );
51 mlt_frame_get_image( that, &p_src, &format, &width_src, &height_src, 0 );
52 alpha_src = mlt_frame_get_alpha_mask( that );
54 // Pick the lesser of two evils ;-)
55 width_src = width_src > width ? width : width_src;
56 height_src = height_src > height ? height : height_src;
60 limit = p_dest + height_src * width_src * 2;
64 *p_dest++ = ( *p_src++ * weigh + *p++ * weigh_complement ) >> 16;
65 *p_dest++ = ( *p_src++ * weigh + *p++ * weigh_complement ) >> 16;
66 *alpha_dst++ = ( *alpha_src++ * weigh + *q++ * weigh_complement ) >> 16;
72 // image processing functions
74 static inline int32_t smoothstep( int32_t edge1, int32_t edge2, uint32_t a )
82 a = ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
84 return ( ( ( a * a ) >> 16 ) * ( ( 3 << 16 ) - ( 2 * a ) ) ) >> 16;
89 \param field_order -1 = progressive, 0 = lower field first, 1 = top field first
91 static void luma_composite( mlt_frame a_frame, mlt_frame b_frame, int luma_width, int luma_height,
92 uint16_t *luma_bitmap, float pos, float frame_delta, float softness, int field_order,
93 int *width, int *height )
95 int width_src = *width, height_src = *height;
96 int width_dest = *width, height_dest = *height;
97 mlt_image_format format_src = mlt_image_yuv422, format_dest = mlt_image_yuv422;
98 uint8_t *p_src, *p_dest;
104 if ( mlt_properties_get( &a_frame->parent, "distort" ) )
105 mlt_properties_set( &b_frame->parent, "distort", mlt_properties_get( &a_frame->parent, "distort" ) );
106 mlt_properties_set_int( &b_frame->parent, "consumer_deinterlace", mlt_properties_get_int( &a_frame->parent, "consumer_deinterlace" ) );
107 mlt_frame_get_image( a_frame, &p_dest, &format_dest, &width_dest, &height_dest, 1 );
108 mlt_frame_get_image( b_frame, &p_src, &format_src, &width_src, &height_src, 0 );
110 if ( *width == 0 || *height == 0 )
113 // Pick the lesser of two evils ;-)
114 width_src = width_src > width_dest ? width_dest : width_src;
115 height_src = height_src > height_dest ? height_dest : height_src;
117 stride_src = width_src * 2;
118 stride_dest = width_dest * 2;
120 // Offset the position based on which field we're looking at ...
121 int32_t field_pos[ 2 ];
122 field_pos[ 0 ] = ( pos + ( ( field_order == 0 ? 1 : 0 ) * frame_delta * 0.5 ) ) * ( 1 << 16 ) * ( 1.0 + softness );
123 field_pos[ 1 ] = ( pos + ( ( field_order == 0 ? 0 : 1 ) * frame_delta * 0.5 ) ) * ( 1 << 16 ) * ( 1.0 + softness );
132 int32_t x_diff = ( luma_width << 16 ) / *width;
133 int32_t y_diff = ( luma_height << 16 ) / *height;
134 int32_t x_offset = 0;
135 int32_t y_offset = 0;
139 int32_t i_softness = softness * ( 1 << 16 );
141 int field_count = field_order < 0 ? 1 : 2;
142 int field_stride_src = field_count * stride_src;
143 int field_stride_dest = field_count * stride_dest;
146 // composite using luma map
147 while ( field < field_count )
149 p_row = p_src + field * stride_src;
150 q_row = p_dest + field * stride_dest;
151 y_offset = field << 16;
154 while ( i < height_src )
159 l = luma_bitmap + ( y_offset >> 16 ) * ( luma_width * field_count );
165 weight = l[ x_offset >> 16 ];
166 value = smoothstep( weight, i_softness + weight, field_pos[ field ] );
167 *o ++ = ( *p ++ * value + *q++ * ( ( 1 << 16 ) - value ) ) >> 16;
168 *o ++ = ( *p ++ * value + *q++ * ( ( 1 << 16 ) - value ) ) >> 16;
174 p_row += field_stride_src;
175 q_row += field_stride_dest;
182 /** Load the luma map from PGM stream.
185 static void luma_read_pgm( FILE *f, uint16_t **map, int *width, int *height )
187 uint8_t *data = NULL;
199 // get the magic code
200 if ( fgets( line, 127, f ) == NULL )
204 while ( sscanf( line, " #%s", comment ) > 0 )
205 if ( fgets( line, 127, f ) == NULL )
208 if ( line[0] != 'P' || line[1] != '5' )
211 // skip white space and see if a new line must be fetched
212 for ( i = 2; i < 127 && line[i] != '\0' && isspace( line[i] ); i++ );
213 if ( ( line[i] == '\0' || line[i] == '#' ) && fgets( line, 127, f ) == NULL )
217 while ( sscanf( line, " #%s", comment ) > 0 )
218 if ( fgets( line, 127, f ) == NULL )
221 // get the dimensions
222 if ( line[0] == 'P' )
223 i = sscanf( line, "P5 %d %d %d", width, height, &maxval );
225 i = sscanf( line, "%d %d %d", width, height, &maxval );
227 // get the height value, if not yet
230 if ( fgets( line, 127, f ) == NULL )
234 while ( sscanf( line, " #%s", comment ) > 0 )
235 if ( fgets( line, 127, f ) == NULL )
238 i = sscanf( line, "%d", height );
245 // get the maximum gray value, if not yet
248 if ( fgets( line, 127, f ) == NULL )
252 while ( sscanf( line, " #%s", comment ) > 0 )
253 if ( fgets( line, 127, f ) == NULL )
256 i = sscanf( line, "%d", &maxval );
261 // determine if this is one or two bytes per pixel
262 bpp = maxval > 255 ? 2 : 1;
264 // allocate temporary storage for the raw data
265 data = mlt_pool_alloc( *width * *height * bpp );
270 if ( fread( data, *width * *height * bpp, 1, f ) != 1 )
273 // allocate the luma bitmap
274 *map = p = (uint16_t*)mlt_pool_alloc( *width * *height * sizeof( uint16_t ) );
278 // proces the raw data into the luma bitmap
279 for ( i = 0; i < *width * *height * bpp; i += bpp )
282 *p++ = data[ i ] << 8;
284 *p++ = ( data[ i ] << 8 ) + data[ i+1 ];
291 mlt_pool_release( data );
294 /** Generate a luma map from an RGB image.
297 static void luma_read_yuv422( uint8_t *image, uint16_t **map, int width, int height )
300 int size = width * height * 2;
302 // allocate the luma bitmap
303 uint16_t *p = *map = ( uint16_t* )mlt_pool_alloc( width * height * sizeof( uint16_t ) );
307 // proces the image data into the luma bitmap
308 for ( i = 0; i < size; i += 2 )
309 *p++ = ( image[ i ] - 16 ) * 299; // 299 = 65535 / 219
315 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
317 // Get the b frame from the stack
318 mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
320 // Get the transition object
321 mlt_transition transition = mlt_frame_pop_service( a_frame );
323 // Get the properties of the transition
324 mlt_properties properties = MLT_TRANSITION_PROPERTIES( transition );
326 // Get the properties of the a frame
327 mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
329 // Get the properties of the b frame
330 mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
332 // This compositer is yuv422 only
333 *format = mlt_image_yuv422;
335 mlt_service_lock( MLT_TRANSITION_SERVICE( transition ) );
337 // The cached luma map information
338 int luma_width = mlt_properties_get_int( properties, "width" );
339 int luma_height = mlt_properties_get_int( properties, "height" );
340 uint16_t *luma_bitmap = mlt_properties_get_data( properties, "bitmap", NULL );
341 char *current_resource = mlt_properties_get( properties, "_resource" );
343 // If the filename property changed, reload the map
344 char *resource = mlt_properties_get( properties, "resource" );
346 // Correct width/height if not specified
347 if ( luma_width == 0 || luma_height == 0 )
350 luma_height = *height;
353 if ( resource && ( !current_resource || strcmp( resource, current_resource ) ) )
356 char *extension = strrchr( resource, '.' );
357 char *orig_resource = resource;
359 if ( strchr( resource, '%' ) )
362 sprintf( temp, "%s/lumas/%s/%s", mlt_environment( "MLT_DATA" ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource, '%' ) + 1 );
363 test = fopen( temp, "r" );
365 strcat( temp, ".png" );
369 extension = strrchr( resource, '.' );
372 // See if it is a PGM
373 if ( extension != NULL && strcmp( extension, ".pgm" ) == 0 )
376 FILE *f = fopen( resource, "r" );
380 luma_read_pgm( f, &luma_bitmap, &luma_width, &luma_height );
383 // Set the transition properties
384 mlt_properties_set_int( properties, "width", luma_width );
385 mlt_properties_set_int( properties, "height", luma_height );
386 mlt_properties_set( properties, "_resource", orig_resource );
387 mlt_properties_set_data( properties, "bitmap", luma_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
393 mlt_properties_set( properties, "_resource", NULL );
394 mlt_properties_set_data( properties, "bitmap", luma_bitmap, 0, mlt_pool_release, NULL );
398 // Get the factory producer service
399 char *factory = mlt_properties_get( properties, "factory" );
401 // Create the producer
402 mlt_profile profile = mlt_service_profile( MLT_TRANSITION_SERVICE( transition ) );
403 mlt_producer producer = mlt_factory_producer( profile, factory, resource );
406 if ( producer != NULL )
408 // Get the producer properties
409 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
411 // Ensure that we loop
412 mlt_properties_set( producer_properties, "eof", "loop" );
414 // Now pass all producer. properties on the transition down
415 mlt_properties_pass( producer_properties, properties, "producer." );
417 // We will get the alpha frame from the producer
418 mlt_frame luma_frame = NULL;
420 // Get the luma frame
421 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &luma_frame, 0 ) == 0 )
423 uint8_t *luma_image = NULL;
424 mlt_image_format luma_format = mlt_image_yuv422;
426 // Get image from the luma producer
427 mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame ), "rescale.interp", "nearest" );
428 mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 );
430 // Generate the luma map
431 if ( luma_image != NULL )
432 luma_read_yuv422( luma_image, &luma_bitmap, luma_width, luma_height );
434 // Set the transition properties
435 mlt_properties_set_int( properties, "width", luma_width );
436 mlt_properties_set_int( properties, "height", luma_height );
437 mlt_properties_set( properties, "_resource", orig_resource);
438 mlt_properties_set_data( properties, "bitmap", luma_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
440 // Cleanup the luma frame
441 mlt_frame_close( luma_frame );
444 // Cleanup the luma producer
445 mlt_producer_close( producer );
450 // Arbitrary composite defaults
451 float mix = mlt_transition_get_progress( transition, a_frame );
452 float frame_delta = mlt_transition_get_progress_delta( transition, a_frame );
453 float luma_softness = mlt_properties_get_double( properties, "softness" );
455 mlt_properties_get_int( a_props, "consumer_deinterlace" ) ||
456 mlt_properties_get_int( properties, "progressive" ) ||
457 mlt_properties_get_int( b_props, "luma.progressive" );
458 int top_field_first = mlt_properties_get_int( b_props, "top_field_first" );
459 int reverse = mlt_properties_get_int( properties, "reverse" );
460 int invert = mlt_properties_get_int( properties, "invert" );
462 if ( mlt_properties_get( a_props, "rescale.interp" ) == NULL || !strcmp( mlt_properties_get( a_props, "rescale.interp" ), "none" ) )
463 mlt_properties_set( a_props, "rescale.interp", "nearest" );
465 // Since we are the consumer of the b_frame, we must pass along this
466 // consumer property from the a_frame
467 if ( mlt_properties_get_double( a_props, "aspect_ratio" ) == 0.0 )
468 mlt_properties_set_double( a_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
469 if ( mlt_properties_get_double( b_props, "aspect_ratio" ) == 0.0 )
470 mlt_properties_set_double( b_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
471 mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
473 // Honour the reverse here
477 // Ensure we get scaling on the b_frame
478 if ( mlt_properties_get( b_props, "rescale.interp" ) == NULL || !strcmp( mlt_properties_get( b_props, "rescale.interp" ), "none" ) )
479 mlt_properties_set( b_props, "rescale.interp", mlt_properties_get( a_props, "rescale.interp" ) );
482 mlt_properties_set_int( b_props, "consumer_deinterlace", mlt_properties_get_int( a_props, "consumer_deinterlace") );
484 if ( mlt_properties_get( properties, "fixed" ) )
485 mix = mlt_properties_get_double( properties, "fixed" );
487 if ( luma_width > 0 && luma_height > 0 && luma_bitmap != NULL )
489 reverse = invert ? !reverse : reverse;
490 mix = reverse ? 1 - mix : mix;
491 frame_delta *= reverse ? -1.0 : 1.0;
492 // Composite the frames using a luma map
493 luma_composite( !invert ? a_frame : b_frame, !invert ? b_frame : a_frame, luma_width, luma_height, luma_bitmap, mix, frame_delta,
494 luma_softness, progressive ? -1 : top_field_first, width, height );
498 mix = ( reverse || invert ) ? 1 - mix : mix;
500 // Dissolve the frames using the time offset for mix value
501 dissolve_yuv( a_frame, b_frame, mix, *width, *height );
504 mlt_service_unlock( MLT_TRANSITION_SERVICE( transition ) );
506 // Extract the a_frame image info
507 *width = mlt_properties_get_int( !invert ? a_props : b_props, "width" );
508 *height = mlt_properties_get_int( !invert ? a_props : b_props, "height" );
509 *image = mlt_properties_get_data( !invert ? a_props : b_props, "image", NULL );
515 /** Luma transition processing.
518 static mlt_frame transition_process( mlt_transition transition, mlt_frame a_frame, mlt_frame b_frame )
520 // Get a unique name to store the frame position
521 char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( transition ), "_unique_id" );
523 // Assign the current position to the name
524 mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame ), name, mlt_frame_get_position( a_frame ) );
526 // Push the transition on to the frame
527 mlt_frame_push_service( a_frame, transition );
529 // Push the b_frame on to the stack
530 mlt_frame_push_frame( a_frame, b_frame );
532 // Push the transition method
533 mlt_frame_push_get_image( a_frame, transition_get_image );
538 /** Constructor for the filter.
541 mlt_transition transition_luma_init( mlt_profile profile, mlt_service_type type, const char *id, char *lumafile )
543 mlt_transition transition = mlt_transition_new( );
544 if ( transition != NULL )
547 transition->process = transition_process;
550 mlt_properties_set( MLT_TRANSITION_PROPERTIES( transition ), "factory", mlt_environment( "MLT_PRODUCER" ) );
552 // Set the main property
553 mlt_properties_set( MLT_TRANSITION_PROPERTIES( transition ), "resource", lumafile );
555 // Inform apps and framework that this is a video only transition
556 mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( transition ), "_transition_type", 1 );