research.m1stereo.tv/gitweb/ - melted/blob - src/modules/core/transition_luma.c

   1 /*
   2  * transition_luma.c -- a generic dissolve/wipe processor
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * Adapted from Kino Plugin Timfx, which is
   7  * Copyright (C) 2002 Timothy M. Shead <tshead@k-3d.com>
   8  *
   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.
  13  *
  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.
  18  *
  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
  22  */
  23
  24 #include "transition_luma.h"
  25 #include <framework/mlt.h>
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <ctype.h>
  30 #include <string.h>
  31 #include <math.h>
  32
  33 /** Calculate the position for this frame.
  34 */
  35
  36 static float position_calculate( mlt_transition this, mlt_frame frame )
  37 {
  38         // Get the in and out position
  39         mlt_position in = mlt_transition_get_in( this );
  40         mlt_position out = mlt_transition_get_out( this );
  41
  42         // Get the position of the frame
  43         char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
  44         mlt_position position = mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame ), name );
  45
  46         // Now do the calcs
  47         return ( float )( position - in ) / ( float )( out - in + 1 );
  48 }
  49
  50 /** Calculate the field delta for this frame - position between two frames.
  51 */
  52
  53 static float delta_calculate( mlt_transition this, mlt_frame frame )
  54 {
  55         // Get the in and out position
  56         mlt_position in = mlt_transition_get_in( this );
  57         mlt_position out = mlt_transition_get_out( this );
  58
  59         // Get the position of the frame
  60         mlt_position position = mlt_frame_get_position( frame );
  61
  62         // Now do the calcs
  63         float x = ( float )( position - in ) / ( float )( out - in + 1 );
  64         float y = ( float )( position + 1 - in ) / ( float )( out - in + 1 );
  65
  66         return ( y - x ) / 2.0;
  67 }
  68
  69 static inline int dissolve_yuv( mlt_frame this, mlt_frame that, float weight, int width, int height )
  70 {
  71         int ret = 0;
  72         int width_src = width, height_src = height;
  73         mlt_image_format format = mlt_image_yuv422;
  74         uint8_t *p_src, *p_dest;
  75         uint8_t *p, *q;
  76         uint8_t *limit;
  77         uint8_t *alpha_src;
  78         uint8_t *alpha_dst;
  79
  80         int32_t weigh = weight * ( 1 << 16 );
  81         int32_t weigh_complement = ( 1 - weight ) * ( 1 << 16 );
  82
  83         if ( mlt_properties_get( &this->parent, "distort" ) )
  84                 mlt_properties_set( &that->parent, "distort", mlt_properties_get( &this->parent, "distort" ) );
  85         mlt_properties_set_int( &that->parent, "consumer_deinterlace", mlt_properties_get_int( &this->parent, "consumer_deinterlace" ) );
  86         mlt_frame_get_image( this, &p_dest, &format, &width, &height, 1 );
  87         alpha_dst = mlt_frame_get_alpha_mask( this );
  88         mlt_frame_get_image( that, &p_src, &format, &width_src, &height_src, 0 );
  89         alpha_src = mlt_frame_get_alpha_mask( that );
  90
  91         // Pick the lesser of two evils ;-)
  92         width_src = width_src > width ? width : width_src;
  93         height_src = height_src > height ? height : height_src;
  94
  95         p = p_dest;
  96         q = alpha_dst;
  97         limit = p_dest + height_src * width_src * 2;
  98
  99         while ( p < limit )
 100         {
 101                 *p_dest++ = ( *p_src++ * weigh + *p++ * weigh_complement ) >> 16;
 102                 *p_dest++ = ( *p_src++ * weigh + *p++ * weigh_complement ) >> 16;
 103                 *alpha_dst++ = ( *alpha_src++ * weigh + *q++ * weigh_complement ) >> 16;
 104         }
 105
 106         return ret;
 107 }
 108
 109 // image processing functions
 110
 111 static inline int32_t smoothstep( int32_t edge1, int32_t edge2, uint32_t a )
 112 {
 113         if ( a < edge1 )
 114                 return 0;
 115
 116         if ( a >= edge2 )
 117                 return 0x10000;
 118
 119         a = ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
 120
 121         return ( ( ( a * a ) >> 16 )  * ( ( 3 << 16 ) - ( 2 * a ) ) ) >> 16;
 122 }
 123
 124 /** powerful stuff
 125
 126     \param field_order -1 = progressive, 0 = lower field first, 1 = top field first
 127 */
 128 static void luma_composite( mlt_frame a_frame, mlt_frame b_frame, int luma_width, int luma_height,
 129                                                         uint16_t *luma_bitmap, float pos, float frame_delta, float softness, int field_order,
 130                                                         int *width, int *height )
 131 {
 132         int width_src = *width, height_src = *height;
 133         int width_dest = *width, height_dest = *height;
 134         mlt_image_format format_src = mlt_image_yuv422, format_dest = mlt_image_yuv422;
 135         uint8_t *p_src, *p_dest;
 136         int i, j;
 137         int stride_src;
 138         int stride_dest;
 139         uint16_t weight = 0;
 140
 141         format_src = mlt_image_yuv422;
 142         format_dest = mlt_image_yuv422;
 143
 144         if ( mlt_properties_get( &a_frame->parent, "distort" ) )
 145                 mlt_properties_set( &b_frame->parent, "distort", mlt_properties_get( &a_frame->parent, "distort" ) );
 146         mlt_properties_set_int( &b_frame->parent, "consumer_deinterlace", mlt_properties_get_int( &a_frame->parent, "consumer_deinterlace" ) );
 147         mlt_frame_get_image( a_frame, &p_dest, &format_dest, &width_dest, &height_dest, 1 );
 148         mlt_frame_get_image( b_frame, &p_src, &format_src, &width_src, &height_src, 0 );
 149
 150         // Pick the lesser of two evils ;-)
 151         width_src = width_src > width_dest ? width_dest : width_src;
 152         height_src = height_src > height_dest ? height_dest : height_src;
 153
 154         stride_src = width_src * 2;
 155         stride_dest = width_dest * 2;
 156
 157         // Offset the position based on which field we're looking at ...
 158         int32_t field_pos[ 2 ];
 159         field_pos[ 0 ] = ( pos + ( ( field_order == 0 ? 1 : 0 ) * frame_delta * 0.5 ) ) * ( 1 << 16 ) * ( 1.0 + softness );
 160         field_pos[ 1 ] = ( pos + ( ( field_order == 0 ? 0 : 1 ) * frame_delta * 0.5 ) ) * ( 1 << 16 ) * ( 1.0 + softness );
 161
 162         register uint8_t *p;
 163         register uint8_t *q;
 164         register uint8_t *o;
 165         uint16_t  *l;
 166
 167         uint32_t value;
 168
 169         int32_t x_diff = ( luma_width << 16 ) / *width;
 170         int32_t y_diff = ( luma_height << 16 ) / *height;
 171         int32_t x_offset = 0;
 172         int32_t y_offset = 0;
 173         uint8_t *p_row;
 174         uint8_t *q_row;
 175
 176         int32_t i_softness = softness * ( 1 << 16 );
 177
 178         int field_count = field_order < 0 ? 1 : 2;
 179         int field_stride_src = field_count * stride_src;
 180         int field_stride_dest = field_count * stride_dest;
 181         int field = 0;
 182
 183         // composite using luma map
 184         while ( field < field_count )
 185         {
 186                 p_row = p_src + field * stride_src;
 187                 q_row = p_dest + field * stride_dest;
 188                 y_offset = field << 16;
 189                 i = field;
 190
 191                 while ( i < height_src )
 192                 {
 193                         p = p_row;
 194                         q = q_row;
 195                         o = q;
 196                         l = luma_bitmap + ( y_offset >> 16 ) * ( luma_width * field_count );
 197                         x_offset = 0;
 198                         j = width_src;
 199
 200                         while( j -- )
 201                         {
 202                 weight = l[ x_offset >> 16 ];
 203                                 value = smoothstep( weight, i_softness + weight, field_pos[ field ] );
 204                                 *o ++ = ( *p ++ * value + *q++ * ( ( 1 << 16 ) - value ) ) >> 16;
 205                                 *o ++ = ( *p ++ * value + *q++ * ( ( 1 << 16 ) - value ) ) >> 16;
 206                                 x_offset += x_diff;
 207                         }
 208
 209                         y_offset += y_diff;
 210                         i += field_count;
 211                         p_row += field_stride_src;
 212                         q_row += field_stride_dest;
 213                 }
 214
 215                 field ++;
 216         }
 217 }
 218
 219 /** Load the luma map from PGM stream.
 220 */
 221
 222 static void luma_read_pgm( FILE *f, uint16_t **map, int *width, int *height )
 223 {
 224         uint8_t *data = NULL;
 225         while (1)
 226         {
 227                 char line[128];
 228                 char comment[128];
 229                 int i = 2;
 230                 int maxval;
 231                 int bpp;
 232                 uint16_t *p;
 233
 234                 line[127] = '\0';
 235
 236                 // get the magic code
 237                 if ( fgets( line, 127, f ) == NULL )
 238                         break;
 239
 240                 // skip comments
 241                 while ( sscanf( line, " #%s", comment ) > 0 )
 242                         if ( fgets( line, 127, f ) == NULL )
 243                                 break;
 244
 245                 if ( line[0] != 'P' || line[1] != '5' )
 246                         break;
 247
 248                 // skip white space and see if a new line must be fetched
 249                 for ( i = 2; i < 127 && line[i] != '\0' && isspace( line[i] ); i++ );
 250                 if ( ( line[i] == '\0' || line[i] == '#' ) && fgets( line, 127, f ) == NULL )
 251                         break;
 252
 253                 // skip comments
 254                 while ( sscanf( line, " #%s", comment ) > 0 )
 255                         if ( fgets( line, 127, f ) == NULL )
 256                                 break;
 257
 258                 // get the dimensions
 259                 if ( line[0] == 'P' )
 260                         i = sscanf( line, "P5 %d %d %d", width, height, &maxval );
 261                 else
 262                         i = sscanf( line, "%d %d %d", width, height, &maxval );
 263
 264                 // get the height value, if not yet
 265                 if ( i < 2 )
 266                 {
 267                         if ( fgets( line, 127, f ) == NULL )
 268                                 break;
 269
 270                         // skip comments
 271                         while ( sscanf( line, " #%s", comment ) > 0 )
 272                                 if ( fgets( line, 127, f ) == NULL )
 273                                         break;
 274
 275                         i = sscanf( line, "%d", height );
 276                         if ( i == 0 )
 277                                 break;
 278                         else
 279                                 i = 2;
 280                 }
 281
 282                 // get the maximum gray value, if not yet
 283                 if ( i < 3 )
 284                 {
 285                         if ( fgets( line, 127, f ) == NULL )
 286                                 break;
 287
 288                         // skip comments
 289                         while ( sscanf( line, " #%s", comment ) > 0 )
 290                                 if ( fgets( line, 127, f ) == NULL )
 291                                         break;
 292
 293                         i = sscanf( line, "%d", &maxval );
 294                         if ( i == 0 )
 295                                 break;
 296                 }
 297
 298                 // determine if this is one or two bytes per pixel
 299                 bpp = maxval > 255 ? 2 : 1;
 300
 301                 // allocate temporary storage for the raw data
 302                 data = mlt_pool_alloc( *width * *height * bpp );
 303                 if ( data == NULL )
 304                         break;
 305
 306                 // read the raw data
 307                 if ( fread( data, *width * *height * bpp, 1, f ) != 1 )
 308                         break;
 309
 310                 // allocate the luma bitmap
 311                 *map = p = (uint16_t*)mlt_pool_alloc( *width * *height * sizeof( uint16_t ) );
 312                 if ( *map == NULL )
 313                         break;
 314
 315                 // proces the raw data into the luma bitmap
 316                 for ( i = 0; i < *width * *height * bpp; i += bpp )
 317                 {
 318                         if ( bpp == 1 )
 319                                 *p++ = data[ i ] << 8;
 320                         else
 321                                 *p++ = ( data[ i ] << 8 ) + data[ i+1 ];
 322                 }
 323
 324                 break;
 325         }
 326
 327         if ( data != NULL )
 328                 mlt_pool_release( data );
 329 }
 330
 331 /** Generate a luma map from an RGB image.
 332 */
 333
 334 static void luma_read_yuv422( uint8_t *image, uint16_t **map, int width, int height )
 335 {
 336         int i;
 337         int size = width * height * 2;
 338
 339         // allocate the luma bitmap
 340         uint16_t *p = *map = ( uint16_t* )mlt_pool_alloc( width * height * sizeof( uint16_t ) );
 341         if ( *map == NULL )
 342                 return;
 343
 344         // proces the image data into the luma bitmap
 345         for ( i = 0; i < size; i += 2 )
 346                 *p++ = ( image[ i ] - 16 ) * 299; // 299 = 65535 / 219
 347 }
 348
 349 /** Generate a luma map from a YUV image.
 350 */
 351 static void luma_read_rgb24( uint8_t *image, uint16_t **map, int width, int height )
 352 {
 353 }
 354
 355 /** Get the image.
 356 */
 357
 358 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
 359 {
 360         // Get the b frame from the stack
 361         mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
 362
 363         // Get the transition object
 364         mlt_transition transition = mlt_frame_pop_service( a_frame );
 365
 366         // Get the properties of the transition
 367         mlt_properties properties = MLT_TRANSITION_PROPERTIES( transition );
 368
 369         // Get the properties of the a frame
 370         mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
 371
 372         // Get the properties of the b frame
 373         mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
 374
 375         // This compositer is yuv422 only
 376         *format = mlt_image_yuv422;
 377
 378         // The cached luma map information
 379         int luma_width = mlt_properties_get_int( properties, "width" );
 380         int luma_height = mlt_properties_get_int( properties, "height" );
 381         uint16_t *luma_bitmap = mlt_properties_get_data( properties, "bitmap", NULL );
 382
 383         // If the filename property changed, reload the map
 384         char *resource = mlt_properties_get( properties, "resource" );
 385
 386         // Correct width/height if not specified
 387         if ( luma_width == 0 || luma_height == 0 )
 388         {
 389                 luma_width = mlt_properties_get_int( a_props, "width" );
 390                 luma_height = mlt_properties_get_int( a_props, "height" );
 391         }
 392
 393         if ( luma_bitmap == NULL && resource != NULL )
 394         {
 395                 char temp[ 512 ];
 396                 char *extension = strrchr( resource, '.' );
 397
 398                 if ( strchr( resource, '%' ) )
 399                 {
 400                         FILE *test;
 401                         sprintf( temp, "%s/lumas/%s/%s", mlt_factory_prefix( ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource, '%' ) + 1 );
 402                         test = fopen( temp, "r" );
 403                         if ( test == NULL )
 404                                 strcat( temp, ".png" );
 405                         else
 406                                 fclose( test );
 407                         resource = temp;
 408                         extension = strrchr( resource, '.' );
 409                 }
 410
 411                 // See if it is a PGM
 412                 if ( extension != NULL && strcmp( extension, ".pgm" ) == 0 )
 413                 {
 414                         // Open PGM
 415                         FILE *f = fopen( resource, "r" );
 416                         if ( f != NULL )
 417                         {
 418                                 // Load from PGM
 419                                 luma_read_pgm( f, &luma_bitmap, &luma_width, &luma_height );
 420                                 fclose( f );
 421
 422                                 // Set the transition properties
 423                                 mlt_properties_set_int( properties, "width", luma_width );
 424                                 mlt_properties_set_int( properties, "height", luma_height );
 425                                 mlt_properties_set_data( properties, "bitmap", luma_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
 426                         }
 427                 }
 428                 else
 429                 {
 430                         // Get the factory producer service
 431                         char *factory = mlt_properties_get( properties, "factory" );
 432
 433                         // Create the producer
 434                         mlt_producer producer = mlt_factory_producer( factory, resource );
 435
 436                         // If we have one
 437                         if ( producer != NULL )
 438                         {
 439                                 // Get the producer properties
 440                                 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 441
 442                                 // Ensure that we loop
 443                                 mlt_properties_set( producer_properties, "eof", "loop" );
 444
 445                                 // Now pass all producer. properties on the transition down
 446                                 mlt_properties_pass( producer_properties, properties, "producer." );
 447
 448                                 // We will get the alpha frame from the producer
 449                                 mlt_frame luma_frame = NULL;
 450
 451                                 // Get the luma frame
 452                                 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &luma_frame, 0 ) == 0 )
 453                                 {
 454                                         uint8_t *luma_image = NULL;
 455                                         mlt_image_format luma_format = mlt_image_yuv422;
 456
 457                                         // Get image from the luma producer
 458                                         mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame ), "rescale.interp", "nearest" );
 459                                         mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 );
 460
 461                                         // Generate the luma map
 462                                         if ( luma_image != NULL && luma_format == mlt_image_yuv422 )
 463                                                 luma_read_yuv422( luma_image, &luma_bitmap, luma_width, luma_height );
 464
 465                                         else if ( luma_image != NULL && luma_format == mlt_image_rgb24 )
 466                                                 luma_read_rgb24( luma_image, &luma_bitmap, luma_width, luma_height );
 467
 468                                         // Set the transition properties
 469                                         mlt_properties_set_int( properties, "width", luma_width );
 470                                         mlt_properties_set_int( properties, "height", luma_height );
 471                                         mlt_properties_set_data( properties, "bitmap", luma_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
 472
 473                                         // Cleanup the luma frame
 474                                         mlt_frame_close( luma_frame );
 475                                 }
 476
 477                                 // Cleanup the luma producer
 478                                 mlt_producer_close( producer );
 479                         }
 480                 }
 481         }
 482
 483         // Arbitrary composite defaults
 484         float mix = position_calculate( transition, a_frame );
 485         float frame_delta = delta_calculate( transition, a_frame );
 486
 487         float luma_softness = mlt_properties_get_double( properties, "softness" );
 488         int progressive =
 489                         mlt_properties_get_int( a_props, "consumer_deinterlace" ) ||
 490                         mlt_properties_get_int( properties, "progressive" ) ||
 491                         mlt_properties_get_int( b_props, "luma.progressive" );
 492         int top_field_first =  mlt_properties_get_int( b_props, "top_field_first" );
 493         int reverse = mlt_properties_get_int( properties, "reverse" );
 494         int invert = mlt_properties_get_int( properties, "invert" );
 495
 496         if ( mlt_properties_get( a_props, "rescale.interp" ) == NULL || !strcmp( mlt_properties_get( a_props, "rescale.interp" ), "none" ) )
 497                 mlt_properties_set( a_props, "rescale.interp", "nearest" );
 498
 499         // Since we are the consumer of the b_frame, we must pass along this
 500         // consumer property from the a_frame
 501         if ( mlt_properties_get_double( a_props, "aspect_ratio" ) == 0.0 )
 502                 mlt_properties_set_double( a_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
 503         if ( mlt_properties_get_double( b_props, "aspect_ratio" ) == 0.0 )
 504                 mlt_properties_set_double( b_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
 505         mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
 506
 507         // Honour the reverse here
 508         if ( mix >= 1.0 )
 509                 mix -= floor( mix );
 510
 511         mix = reverse || invert ? 1 - mix : mix;
 512         frame_delta *= reverse || invert ? -1.0 : 1.0;
 513
 514         // Ensure we get scaling on the b_frame
 515         if ( mlt_properties_get( b_props, "rescale.interp" ) == NULL || !strcmp( mlt_properties_get( b_props, "rescale.interp" ), "none" ) )
 516                 mlt_properties_set( b_props, "rescale.interp", "nearest" );
 517
 518         if ( mlt_properties_get( properties, "fixed" ) )
 519                 mix = mlt_properties_get_double( properties, "fixed" );
 520
 521
 522         if ( luma_width > 0 && luma_height > 0 && luma_bitmap != NULL )
 523                 // Composite the frames using a luma map
 524                 luma_composite( !invert ? a_frame : b_frame, !invert ? b_frame : a_frame, luma_width, luma_height, luma_bitmap, mix, frame_delta,
 525                         luma_softness, progressive ? -1 : top_field_first, width, height );
 526         else
 527                 // Dissolve the frames using the time offset for mix value
 528                 dissolve_yuv( a_frame, b_frame, mix, *width, *height );
 529
 530
 531         // Extract the a_frame image info
 532         *width = mlt_properties_get_int( !invert ? a_props : b_props, "width" );
 533         *height = mlt_properties_get_int( !invert ? a_props : b_props, "height" );
 534         *image = mlt_properties_get_data( !invert ? a_props : b_props, "image", NULL );
 535
 536         return 0;
 537 }
 538
 539
 540 /** Luma transition processing.
 541 */
 542
 543 static mlt_frame transition_process( mlt_transition transition, mlt_frame a_frame, mlt_frame b_frame )
 544 {
 545         // Get a unique name to store the frame position
 546         char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( transition ), "_unique_id" );
 547
 548         // Assign the current position to the name
 549         mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame ), name, mlt_frame_get_position( a_frame ) );
 550
 551         // Push the transition on to the frame
 552         mlt_frame_push_service( a_frame, transition );
 553
 554         // Push the b_frame on to the stack
 555         mlt_frame_push_frame( a_frame, b_frame );
 556
 557         // Push the transition method
 558         mlt_frame_push_get_image( a_frame, transition_get_image );
 559
 560         return a_frame;
 561 }
 562
 563 /** Constructor for the filter.
 564 */
 565
 566 mlt_transition transition_luma_init( char *lumafile )
 567 {
 568         mlt_transition transition = mlt_transition_new( );
 569         if ( transition != NULL )
 570         {
 571                 // Set the methods
 572                 transition->process = transition_process;
 573
 574                 // Default factory
 575                 mlt_properties_set( MLT_TRANSITION_PROPERTIES( transition ), "factory", "fezzik" );
 576
 577                 // Set the main property
 578                 mlt_properties_set( MLT_TRANSITION_PROPERTIES( transition ), "resource", lumafile );
 579
 580                 // Inform apps and framework that this is a video only transition
 581                 mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( transition ), "_transition_type", 1 );
 582
 583                 return transition;
 584         }
 585         return NULL;
 586 }