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