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