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