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  * 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.
  10  *
  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.
  15  *
  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.
  19  */
  20
  21 #include "transition_luma.h"
  22 #include <framework/mlt.h>
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <ctype.h>
  27 #include <string.h>
  28 #include <math.h>
  29
  30 /** Calculate the position for this frame.
  31 */
  32
  33 static float position_calculate( mlt_transition this, mlt_frame frame )
  34 {
  35         // Get the in and out position
  36         mlt_position in = mlt_transition_get_in( this );
  37         mlt_position out = mlt_transition_get_out( this );
  38
  39         // Get the position of the frame
  40         char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( this ), "_unique_id" );
  41         mlt_position position = mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame ), name );
  42
  43         // Now do the calcs
  44         return ( float )( position - in ) / ( float )( out - in + 1 );
  45 }
  46
  47 /** Calculate the field delta for this frame - position between two frames.
  48 */
  49
  50 static float delta_calculate( mlt_transition this, mlt_frame frame )
  51 {
  52         // Get the in and out position
  53         mlt_position in = mlt_transition_get_in( this );
  54         mlt_position out = mlt_transition_get_out( this );
  55
  56         // Get the position of the frame
  57         mlt_position position = mlt_frame_get_position( frame );
  58
  59         // Now do the calcs
  60         float x = ( float )( position - in ) / ( float )( out - in + 1 );
  61         float y = ( float )( position + 1 - in ) / ( float )( out - in + 1 );
  62
  63         return ( y - x ) / 2.0;
  64 }
  65
  66 static inline int dissolve_yuv( mlt_frame this, mlt_frame that, float weight, int width, int height )
  67 {
  68         int ret = 0;
  69         int width_src = width, height_src = height;
  70         mlt_image_format format = mlt_image_yuv422;
  71         uint8_t *p_src, *p_dest;
  72         uint8_t *p, *q;
  73         uint8_t *limit;
  74         uint8_t *alpha_src;
  75         uint8_t *alpha_dst;
  76
  77         int32_t weigh = weight * ( 1 << 16 );
  78         int32_t weigh_complement = ( 1 - weight ) * ( 1 << 16 );
  79
  80         if ( mlt_properties_get( &this->parent, "distort" ) )
  81                 mlt_properties_set( &that->parent, "distort", mlt_properties_get( &this->parent, "distort" ) );
  82         mlt_properties_set_int( &that->parent, "consumer_deinterlace", mlt_properties_get_int( &this->parent, "consumer_deinterlace" ) );
  83         mlt_frame_get_image( this, &p_dest, &format, &width, &height, 1 );
  84         alpha_dst = mlt_frame_get_alpha_mask( this );
  85         mlt_frame_get_image( that, &p_src, &format, &width_src, &height_src, 0 );
  86         alpha_src = mlt_frame_get_alpha_mask( that );
  87
  88         // Pick the lesser of two evils ;-)
  89         width_src = width_src > width ? width : width_src;
  90         height_src = height_src > height ? height : height_src;
  91
  92         p = p_dest;
  93         q = alpha_dst;
  94         limit = p_dest + height_src * width_src * 2;
  95
  96         while ( p < limit )
  97         {
  98                 *p_dest++ = ( *p_src++ * weigh + *p++ * weigh_complement ) >> 16;
  99                 *p_dest++ = ( *p_src++ * weigh + *p++ * weigh_complement ) >> 16;
 100                 *alpha_dst++ = ( *alpha_src++ * weigh + *q++ * weigh_complement ) >> 16;
 101         }
 102
 103         return ret;
 104 }
 105
 106 // image processing functions
 107
 108 static inline int32_t smoothstep( int32_t edge1, int32_t edge2, uint32_t a )
 109 {
 110         if ( a < edge1 )
 111                 return 0;
 112
 113         if ( a >= edge2 )
 114                 return 0x10000;
 115
 116         a = ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
 117
 118         return ( ( ( a * a ) >> 16 )  * ( ( 3 << 16 ) - ( 2 * a ) ) ) >> 16;
 119 }
 120
 121 /** powerful stuff
 122
 123     \param field_order -1 = progressive, 0 = lower field first, 1 = top field first
 124 */
 125 static void luma_composite( mlt_frame a_frame, mlt_frame b_frame, int luma_width, int luma_height,
 126                                                         uint16_t *luma_bitmap, float pos, float frame_delta, float softness, int field_order,
 127                                                         int *width, int *height )
 128 {
 129         int width_src = *width, height_src = *height;
 130         int width_dest = *width, height_dest = *height;
 131         mlt_image_format format_src = mlt_image_yuv422, format_dest = mlt_image_yuv422;
 132         uint8_t *p_src, *p_dest;
 133         int i, j;
 134         int stride_src;
 135         int stride_dest;
 136         uint16_t weight = 0;
 137
 138         format_src = mlt_image_yuv422;
 139         format_dest = mlt_image_yuv422;
 140
 141         if ( mlt_properties_get( &a_frame->parent, "distort" ) )
 142                 mlt_properties_set( &b_frame->parent, "distort", mlt_properties_get( &a_frame->parent, "distort" ) );
 143         mlt_properties_set_int( &b_frame->parent, "consumer_deinterlace", mlt_properties_get_int( &a_frame->parent, "consumer_deinterlace" ) );
 144         mlt_frame_get_image( a_frame, &p_dest, &format_dest, &width_dest, &height_dest, 1 );
 145         mlt_frame_get_image( b_frame, &p_src, &format_src, &width_src, &height_src, 0 );
 146
 147         // Pick the lesser of two evils ;-)
 148         width_src = width_src > width_dest ? width_dest : width_src;
 149         height_src = height_src > height_dest ? height_dest : height_src;
 150
 151         stride_src = width_src * 2;
 152         stride_dest = width_dest * 2;
 153
 154         // Offset the position based on which field we're looking at ...
 155         int32_t field_pos[ 2 ];
 156         field_pos[ 0 ] = ( pos + ( ( field_order == 0 ? 1 : 0 ) * frame_delta * 0.5 ) ) * ( 1 << 16 ) * ( 1.0 + softness );
 157         field_pos[ 1 ] = ( pos + ( ( field_order == 0 ? 0 : 1 ) * frame_delta * 0.5 ) ) * ( 1 << 16 ) * ( 1.0 + softness );
 158
 159         register uint8_t *p;
 160         register uint8_t *q;
 161         register uint8_t *o;
 162         uint16_t  *l;
 163
 164         uint32_t value;
 165
 166         int32_t x_diff = ( luma_width << 16 ) / *width;
 167         int32_t y_diff = ( luma_height << 16 ) / *height;
 168         int32_t x_offset = 0;
 169         int32_t y_offset = 0;
 170         uint8_t *p_row;
 171         uint8_t *q_row;
 172
 173         int32_t i_softness = softness * ( 1 << 16 );
 174
 175         int field_count = field_order < 0 ? 1 : 2;
 176         int field_stride_src = field_count * stride_src;
 177         int field_stride_dest = field_count * stride_dest;
 178         int field = 0;
 179
 180         // composite using luma map
 181         while ( field < field_count )
 182         {
 183                 p_row = p_src + field * stride_src;
 184                 q_row = p_dest + field * stride_dest;
 185                 y_offset = field << 16;
 186                 i = field;
 187
 188                 while ( i < height_src )
 189                 {
 190                         p = p_row;
 191                         q = q_row;
 192                         o = q;
 193                         l = luma_bitmap + ( y_offset >> 16 ) * ( luma_width * field_count );
 194                         x_offset = 0;
 195                         j = width_src;
 196
 197                         while( j -- )
 198                         {
 199                 weight = l[ x_offset >> 16 ];
 200                                 value = smoothstep( weight, i_softness + weight, field_pos[ field ] );
 201                                 *o ++ = ( *p ++ * value + *q++ * ( ( 1 << 16 ) - value ) ) >> 16;
 202                                 *o ++ = ( *p ++ * value + *q++ * ( ( 1 << 16 ) - value ) ) >> 16;
 203                                 x_offset += x_diff;
 204                         }
 205
 206                         y_offset += y_diff;
 207                         i += field_count;
 208                         p_row += field_stride_src;
 209                         q_row += field_stride_dest;
 210                 }
 211
 212                 field ++;
 213         }
 214 }
 215
 216 /** Load the luma map from PGM stream.
 217 */
 218
 219 static void luma_read_pgm( FILE *f, uint16_t **map, int *width, int *height )
 220 {
 221         uint8_t *data = NULL;
 222         while (1)
 223         {
 224                 char line[128];
 225                 char comment[128];
 226                 int i = 2;
 227                 int maxval;
 228                 int bpp;
 229                 uint16_t *p;
 230
 231                 line[127] = '\0';
 232
 233                 // get the magic code
 234                 if ( fgets( line, 127, f ) == NULL )
 235                         break;
 236
 237                 // skip comments
 238                 while ( sscanf( line, " #%s", comment ) > 0 )
 239                         if ( fgets( line, 127, f ) == NULL )
 240                                 break;
 241
 242                 if ( line[0] != 'P' || line[1] != '5' )
 243                         break;
 244
 245                 // skip white space and see if a new line must be fetched
 246                 for ( i = 2; i < 127 && line[i] != '\0' && isspace( line[i] ); i++ );
 247                 if ( ( line[i] == '\0' || line[i] == '#' ) && fgets( line, 127, f ) == NULL )
 248                         break;
 249
 250                 // skip comments
 251                 while ( sscanf( line, " #%s", comment ) > 0 )
 252                         if ( fgets( line, 127, f ) == NULL )
 253                                 break;
 254
 255                 // get the dimensions
 256                 if ( line[0] == 'P' )
 257                         i = sscanf( line, "P5 %d %d %d", width, height, &maxval );
 258                 else
 259                         i = sscanf( line, "%d %d %d", width, height, &maxval );
 260
 261                 // get the height value, if not yet
 262                 if ( i < 2 )
 263                 {
 264                         if ( fgets( line, 127, f ) == NULL )
 265                                 break;
 266
 267                         // skip comments
 268                         while ( sscanf( line, " #%s", comment ) > 0 )
 269                                 if ( fgets( line, 127, f ) == NULL )
 270                                         break;
 271
 272                         i = sscanf( line, "%d", height );
 273                         if ( i == 0 )
 274                                 break;
 275                         else
 276                                 i = 2;
 277                 }
 278
 279                 // get the maximum gray value, if not yet
 280                 if ( i < 3 )
 281                 {
 282                         if ( fgets( line, 127, f ) == NULL )
 283                                 break;
 284
 285                         // skip comments
 286                         while ( sscanf( line, " #%s", comment ) > 0 )
 287                                 if ( fgets( line, 127, f ) == NULL )
 288                                         break;
 289
 290                         i = sscanf( line, "%d", &maxval );
 291                         if ( i == 0 )
 292                                 break;
 293                 }
 294
 295                 // determine if this is one or two bytes per pixel
 296                 bpp = maxval > 255 ? 2 : 1;
 297
 298                 // allocate temporary storage for the raw data
 299                 data = mlt_pool_alloc( *width * *height * bpp );
 300                 if ( data == NULL )
 301                         break;
 302
 303                 // read the raw data
 304                 if ( fread( data, *width * *height * bpp, 1, f ) != 1 )
 305                         break;
 306
 307                 // allocate the luma bitmap
 308                 *map = p = (uint16_t*)mlt_pool_alloc( *width * *height * sizeof( uint16_t ) );
 309                 if ( *map == NULL )
 310                         break;
 311
 312                 // proces the raw data into the luma bitmap
 313                 for ( i = 0; i < *width * *height * bpp; i += bpp )
 314                 {
 315                         if ( bpp == 1 )
 316                                 *p++ = data[ i ] << 8;
 317                         else
 318                                 *p++ = ( data[ i ] << 8 ) + data[ i+1 ];
 319                 }
 320
 321                 break;
 322         }
 323
 324         if ( data != NULL )
 325                 mlt_pool_release( data );
 326 }
 327
 328 /** Generate a luma map from an RGB image.
 329 */
 330
 331 static void luma_read_yuv422( uint8_t *image, uint16_t **map, int width, int height )
 332 {
 333         int i;
 334         int size = width * height * 2;
 335
 336         // allocate the luma bitmap
 337         uint16_t *p = *map = ( uint16_t* )mlt_pool_alloc( width * height * sizeof( uint16_t ) );
 338         if ( *map == NULL )
 339                 return;
 340
 341         // proces the image data into the luma bitmap
 342         for ( i = 0; i < size; i += 2 )
 343                 *p++ = ( image[ i ] - 16 ) * 299; // 299 = 65535 / 219
 344 }
 345
 346 /** Generate a luma map from a YUV image.
 347 */
 348 static void luma_read_rgb24( uint8_t *image, uint16_t **map, int width, int height )
 349 {
 350 }
 351
 352 /** Get the image.
 353 */
 354
 355 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
 356 {
 357         // Get the b frame from the stack
 358         mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
 359
 360         // Get the transition object
 361         mlt_transition transition = mlt_frame_pop_service( a_frame );
 362
 363         // Get the properties of the transition
 364         mlt_properties properties = MLT_TRANSITION_PROPERTIES( transition );
 365
 366         // Get the properties of the a frame
 367         mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
 368
 369         // Get the properties of the b frame
 370         mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame );
 371
 372         // The cached luma map information
 373         int luma_width = mlt_properties_get_int( properties, "width" );
 374         int luma_height = mlt_properties_get_int( properties, "height" );
 375         uint16_t *luma_bitmap = mlt_properties_get_data( properties, "bitmap", NULL );
 376
 377         // If the filename property changed, reload the map
 378         char *resource = mlt_properties_get( properties, "resource" );
 379
 380         // Correct width/height if not specified
 381         if ( luma_width == 0 || luma_height == 0 )
 382         {
 383                 luma_width = mlt_properties_get_int( a_props, "width" );
 384                 luma_height = mlt_properties_get_int( a_props, "height" );
 385         }
 386
 387         if ( luma_bitmap == NULL && resource != NULL )
 388         {
 389                 char temp[ 512 ];
 390                 char *extension = strrchr( resource, '.' );
 391
 392                 if ( strchr( resource, '%' ) )
 393                 {
 394                         FILE *test;
 395                         sprintf( temp, "%s/lumas/%s/%s", mlt_factory_prefix( ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource, '%' ) + 1 );
 396                         test = fopen( temp, "r" );
 397                         if ( test == NULL )
 398                                 strcat( temp, ".png" );
 399                         else
 400                                 fclose( test );
 401                         resource = temp;
 402                         extension = strrchr( resource, '.' );
 403                 }
 404
 405                 // See if it is a PGM
 406                 if ( extension != NULL && strcmp( extension, ".pgm" ) == 0 )
 407                 {
 408                         // Open PGM
 409                         FILE *f = fopen( resource, "r" );
 410                         if ( f != NULL )
 411                         {
 412                                 // Load from PGM
 413                                 luma_read_pgm( f, &luma_bitmap, &luma_width, &luma_height );
 414                                 fclose( f );
 415
 416                                 // Set the transition properties
 417                                 mlt_properties_set_int( properties, "width", luma_width );
 418                                 mlt_properties_set_int( properties, "height", luma_height );
 419                                 mlt_properties_set_data( properties, "bitmap", luma_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
 420                         }
 421                 }
 422                 else
 423                 {
 424                         // Get the factory producer service
 425                         char *factory = mlt_properties_get( properties, "factory" );
 426
 427                         // Create the producer
 428                         mlt_producer producer = mlt_factory_producer( factory, resource );
 429
 430                         // If we have one
 431                         if ( producer != NULL )
 432                         {
 433                                 // Get the producer properties
 434                                 mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
 435
 436                                 // Ensure that we loop
 437                                 mlt_properties_set( producer_properties, "eof", "loop" );
 438
 439                                 // Now pass all producer. properties on the transition down
 440                                 mlt_properties_pass( producer_properties, properties, "producer." );
 441
 442                                 // We will get the alpha frame from the producer
 443                                 mlt_frame luma_frame = NULL;
 444
 445                                 // Get the luma frame
 446                                 if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &luma_frame, 0 ) == 0 )
 447                                 {
 448                                         uint8_t *luma_image = NULL;
 449                                         mlt_image_format luma_format = mlt_image_yuv422;
 450
 451                                         // Get image from the luma producer
 452                                         mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame ), "rescale.interp", "nearest" );
 453                                         mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 );
 454
 455                                         // Generate the luma map
 456                                         if ( luma_image != NULL && luma_format == mlt_image_yuv422 )
 457                                                 luma_read_yuv422( luma_image, &luma_bitmap, luma_width, luma_height );
 458
 459                                         else if ( luma_image != NULL && luma_format == mlt_image_rgb24 )
 460                                                 luma_read_rgb24( luma_image, &luma_bitmap, luma_width, luma_height );
 461
 462                                         // Set the transition properties
 463                                         mlt_properties_set_int( properties, "width", luma_width );
 464                                         mlt_properties_set_int( properties, "height", luma_height );
 465                                         mlt_properties_set_data( properties, "bitmap", luma_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
 466
 467                                         // Cleanup the luma frame
 468                                         mlt_frame_close( luma_frame );
 469                                 }
 470
 471                                 // Cleanup the luma producer
 472                                 mlt_producer_close( producer );
 473                         }
 474                 }
 475         }
 476
 477         // Arbitrary composite defaults
 478         float mix = position_calculate( transition, a_frame );
 479         float frame_delta = delta_calculate( transition, a_frame );
 480
 481         float luma_softness = mlt_properties_get_double( properties, "softness" );
 482         int progressive =
 483                         mlt_properties_get_int( a_props, "consumer_deinterlace" ) ||
 484                         mlt_properties_get_int( properties, "progressive" ) ||
 485                         mlt_properties_get_int( b_props, "luma.progressive" );
 486         int top_field_first =  mlt_properties_get_int( b_props, "top_field_first" );
 487         int reverse = mlt_properties_get_int( properties, "reverse" );
 488         int invert = mlt_properties_get_int( properties, "invert" );
 489
 490         if ( mlt_properties_get( a_props, "rescale.interp" ) == NULL || !strcmp( mlt_properties_get( a_props, "rescale.interp" ), "none" ) )
 491                 mlt_properties_set( a_props, "rescale.interp", "nearest" );
 492
 493         // Since we are the consumer of the b_frame, we must pass along this
 494         // consumer property from the a_frame
 495         if ( mlt_properties_get_double( a_props, "aspect_ratio" ) == 0.0 )
 496                 mlt_properties_set_double( a_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
 497         if ( mlt_properties_get_double( b_props, "aspect_ratio" ) == 0.0 )
 498                 mlt_properties_set_double( b_props, "aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
 499         mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
 500
 501         // Honour the reverse here
 502         if ( mix >= 1.0 )
 503                 mix -= floor( mix );
 504
 505         mix = reverse || invert ? 1 - mix : mix;
 506         frame_delta *= reverse || invert ? -1.0 : 1.0;
 507
 508         // Ensure we get scaling on the b_frame
 509         if ( mlt_properties_get( b_props, "rescale.interp" ) == NULL || !strcmp( mlt_properties_get( b_props, "rescale.interp" ), "none" ) )
 510                 mlt_properties_set( b_props, "rescale.interp", "nearest" );
 511
 512         if ( mlt_properties_get( properties, "fixed" ) )
 513                 mix = mlt_properties_get_double( properties, "fixed" );
 514
 515         if ( luma_width > 0 && luma_height > 0 && luma_bitmap != NULL )
 516                 // Composite the frames using a luma map
 517                 luma_composite( !invert ? a_frame : b_frame, !invert ? b_frame : a_frame, luma_width, luma_height, luma_bitmap, mix, frame_delta,
 518                         luma_softness, progressive ? -1 : top_field_first, width, height );
 519         else
 520                 // Dissolve the frames using the time offset for mix value
 521                 dissolve_yuv( a_frame, b_frame, mix, *width, *height );
 522
 523         // Extract the a_frame image info
 524         *width = mlt_properties_get_int( !invert ? a_props : b_props, "width" );
 525         *height = mlt_properties_get_int( !invert ? a_props : b_props, "height" );
 526         *image = mlt_properties_get_data( !invert ? a_props : b_props, "image", NULL );
 527
 528         return 0;
 529 }
 530
 531
 532 /** Luma transition processing.
 533 */
 534
 535 static mlt_frame transition_process( mlt_transition transition, mlt_frame a_frame, mlt_frame b_frame )
 536 {
 537         // Get a unique name to store the frame position
 538         char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( transition ), "_unique_id" );
 539
 540         // Assign the current position to the name
 541         mlt_properties_set_position( MLT_FRAME_PROPERTIES( a_frame ), name, mlt_frame_get_position( a_frame ) );
 542
 543         // Push the transition on to the frame
 544         mlt_frame_push_service( a_frame, transition );
 545
 546         // Push the b_frame on to the stack
 547         mlt_frame_push_frame( a_frame, b_frame );
 548
 549         // Push the transition method
 550         mlt_frame_push_get_image( a_frame, transition_get_image );
 551
 552         return a_frame;
 553 }
 554
 555 /** Constructor for the filter.
 556 */
 557
 558 mlt_transition transition_luma_init( char *lumafile )
 559 {
 560         mlt_transition transition = mlt_transition_new( );
 561         if ( transition != NULL )
 562         {
 563                 // Set the methods
 564                 transition->process = transition_process;
 565
 566                 // Default factory
 567                 mlt_properties_set( MLT_TRANSITION_PROPERTIES( transition ), "factory", "fezzik" );
 568
 569                 // Set the main property
 570                 mlt_properties_set( MLT_TRANSITION_PROPERTIES( transition ), "resource", lumafile );
 571
 572                 // Inform apps and framework that this is a video only transition
 573                 mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( transition ), "_transition_type", 1 );
 574
 575                 return transition;
 576         }
 577         return NULL;
 578 }