609b6105dadc8b2913fed43179cb9136c3013273
[melted] / 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 int32_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 int field = 0;
159
160 // composite using luma map
161 while ( field < field_count )
162 {
163 p_row = p_src + field * stride_src;
164 q_row = p_dest + field * stride_dest;
165 y_offset = field << 16;
166 i = field;
167
168 while ( i < height_src )
169 {
170 p = p_row;
171 q = q_row;
172 o = q;
173 l = luma_bitmap + ( y_offset >> 16 ) * ( luma_width * field_count );
174 x_offset = 0;
175 j = width_src;
176
177 while( j -- )
178 {
179 weight = l[ x_offset >> 16 ];
180 value = smoothstep( weight, i_softness + weight, field_pos[ field ] );
181 *o ++ = ( *p ++ * value + *q++ * ( ( 1 << 16 ) - value ) ) >> 16;
182 *o ++ = ( *p ++ * value + *q++ * ( ( 1 << 16 ) - value ) ) >> 16;
183 x_offset += x_diff;
184 }
185
186 y_offset += y_diff;
187 i += field_count;
188 p_row += field_stride_src;
189 q_row += field_stride_dest;
190 }
191
192 field ++;
193 }
194 }
195
196 /** Load the luma map from PGM stream.
197 */
198
199 static void luma_read_pgm( FILE *f, uint16_t **map, int *width, int *height )
200 {
201 uint8_t *data = NULL;
202 while (1)
203 {
204 char line[128];
205 char comment[128];
206 int i = 2;
207 int maxval;
208 int bpp;
209 uint16_t *p;
210
211 line[127] = '\0';
212
213 // get the magic code
214 if ( fgets( line, 127, f ) == NULL )
215 break;
216
217 // skip comments
218 while ( sscanf( line, " #%s", comment ) > 0 )
219 if ( fgets( line, 127, f ) == NULL )
220 break;
221
222 if ( line[0] != 'P' || line[1] != '5' )
223 break;
224
225 // skip white space and see if a new line must be fetched
226 for ( i = 2; i < 127 && line[i] != '\0' && isspace( line[i] ); i++ );
227 if ( ( line[i] == '\0' || line[i] == '#' ) && fgets( line, 127, f ) == NULL )
228 break;
229
230 // skip comments
231 while ( sscanf( line, " #%s", comment ) > 0 )
232 if ( fgets( line, 127, f ) == NULL )
233 break;
234
235 // get the dimensions
236 if ( line[0] == 'P' )
237 i = sscanf( line, "P5 %d %d %d", width, height, &maxval );
238 else
239 i = sscanf( line, "%d %d %d", width, height, &maxval );
240
241 // get the height value, if not yet
242 if ( i < 2 )
243 {
244 if ( fgets( line, 127, f ) == NULL )
245 break;
246
247 // skip comments
248 while ( sscanf( line, " #%s", comment ) > 0 )
249 if ( fgets( line, 127, f ) == NULL )
250 break;
251
252 i = sscanf( line, "%d", height );
253 if ( i == 0 )
254 break;
255 else
256 i = 2;
257 }
258
259 // get the maximum gray value, if not yet
260 if ( i < 3 )
261 {
262 if ( fgets( line, 127, f ) == NULL )
263 break;
264
265 // skip comments
266 while ( sscanf( line, " #%s", comment ) > 0 )
267 if ( fgets( line, 127, f ) == NULL )
268 break;
269
270 i = sscanf( line, "%d", &maxval );
271 if ( i == 0 )
272 break;
273 }
274
275 // determine if this is one or two bytes per pixel
276 bpp = maxval > 255 ? 2 : 1;
277
278 // allocate temporary storage for the raw data
279 data = mlt_pool_alloc( *width * *height * bpp );
280 if ( data == NULL )
281 break;
282
283 // read the raw data
284 if ( fread( data, *width * *height * bpp, 1, f ) != 1 )
285 break;
286
287 // allocate the luma bitmap
288 *map = p = (uint16_t*)mlt_pool_alloc( *width * *height * sizeof( uint16_t ) );
289 if ( *map == NULL )
290 break;
291
292 // proces the raw data into the luma bitmap
293 for ( i = 0; i < *width * *height * bpp; i += bpp )
294 {
295 if ( bpp == 1 )
296 *p++ = data[ i ] << 8;
297 else
298 *p++ = ( data[ i ] << 8 ) + data[ i+1 ];
299 }
300
301 break;
302 }
303
304 if ( data != NULL )
305 mlt_pool_release( data );
306 }
307
308 /** Generate a luma map from an RGB image.
309 */
310
311 static void luma_read_yuv422( uint8_t *image, uint16_t **map, int width, int height )
312 {
313 int i;
314
315 // allocate the luma bitmap
316 uint16_t *p = *map = ( uint16_t* )mlt_pool_alloc( width * height * sizeof( uint16_t ) );
317 if ( *map == NULL )
318 return;
319
320 // proces the image data into the luma bitmap
321 for ( i = 0; i < width * height * 2; i += 2 )
322 *p++ = ( image[ i ] - 16 ) * 299; // 299 = 65535 / 219
323 }
324
325 /** Generate a luma map from a YUV image.
326 */
327 static void luma_read_rgb24( uint8_t *image, uint16_t **map, int width, int height )
328 {
329 }
330
331 /** Get the image.
332 */
333
334 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
335 {
336 // Get the b frame from the stack
337 mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
338
339 // Get the transition object
340 mlt_transition transition = mlt_frame_pop_service( a_frame );
341
342 // Get the properties of the transition
343 mlt_properties properties = mlt_transition_properties( transition );
344
345 // Get the properties of the a frame
346 mlt_properties a_props = mlt_frame_properties( a_frame );
347
348 // Get the properties of the b frame
349 mlt_properties b_props = mlt_frame_properties( b_frame );
350
351 // The cached luma map information
352 int luma_width = mlt_properties_get_int( properties, "width" );
353 int luma_height = mlt_properties_get_int( properties, "height" );
354 uint16_t *luma_bitmap = mlt_properties_get_data( properties, "bitmap", NULL );
355
356 // If the filename property changed, reload the map
357 char *resource = mlt_properties_get( properties, "resource" );
358
359 if ( luma_bitmap == NULL && resource != NULL )
360 {
361 char *extension = extension = strrchr( resource, '.' );
362
363 // See if it is a PGM
364 if ( extension != NULL && strcmp( extension, ".pgm" ) == 0 )
365 {
366 // Open PGM
367 FILE *f = fopen( resource, "r" );
368 if ( f != NULL )
369 {
370 // Load from PGM
371 luma_read_pgm( f, &luma_bitmap, &luma_width, &luma_height );
372 fclose( f );
373
374 // Set the transition properties
375 mlt_properties_set_int( properties, "width", luma_width );
376 mlt_properties_set_int( properties, "height", luma_height );
377 mlt_properties_set_data( properties, "bitmap", luma_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
378 }
379 }
380 else
381 {
382 // Get the factory producer service
383 char *factory = mlt_properties_get( properties, "factory" );
384
385 // Create the producer
386 mlt_producer producer = mlt_factory_producer( factory, resource );
387
388 // If we have one
389 if ( producer != NULL )
390 {
391 // Get the producer properties
392 mlt_properties producer_properties = mlt_producer_properties( producer );
393
394 // Ensure that we loop
395 mlt_properties_set( producer_properties, "eof", "loop" );
396
397 // Now pass all producer. properties on the transition down
398 mlt_properties_pass( producer_properties, properties, "producer." );
399
400 // We will get the alpha frame from the producer
401 mlt_frame luma_frame = NULL;
402
403 // Get the luma frame
404 if ( mlt_service_get_frame( mlt_producer_service( producer ), &luma_frame, 0 ) == 0 )
405 {
406 uint8_t *luma_image;
407 mlt_image_format luma_format = mlt_image_yuv422;
408
409 // Get image from the luma producer
410 mlt_properties_set( mlt_frame_properties( luma_frame ), "rescale.interp", "none" );
411 mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 );
412
413 // Generate the luma map
414 if ( luma_image != NULL && luma_format == mlt_image_yuv422 )
415 luma_read_yuv422( luma_image, &luma_bitmap, luma_width, luma_height );
416
417 else if ( luma_image != NULL && luma_format == mlt_image_rgb24 )
418 luma_read_rgb24( luma_image, &luma_bitmap, luma_width, luma_height );
419
420 // Set the transition properties
421 mlt_properties_set_int( properties, "width", luma_width );
422 mlt_properties_set_int( properties, "height", luma_height );
423 mlt_properties_set_data( properties, "bitmap", luma_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
424
425 // Cleanup the luma frame
426 mlt_frame_close( luma_frame );
427 }
428
429 // Cleanup the luma producer
430 mlt_producer_close( producer );
431 }
432 }
433 }
434
435 // Arbitrary composite defaults
436 float mix = position_calculate( transition, a_frame );
437 float frame_delta = delta_calculate( transition, a_frame );
438
439 float luma_softness = mlt_properties_get_double( properties, "softness" );
440 int progressive =
441 mlt_properties_get_int( a_props, "consumer_progressive" ) ||
442 mlt_properties_get_int( properties, "progressive" ) ||
443 mlt_properties_get_int( b_props, "luma.progressive" );
444 int top_field_first = mlt_properties_get_int( b_props, "top_field_first" );
445 int reverse = mlt_properties_get_int( properties, "reverse" );
446
447 // Since we are the consumer of the b_frame, we must pass along this
448 // consumer property from the a_frame
449 if ( !strcmp( mlt_properties_get( a_props, "rescale.interp" ), "none" ) )
450 mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "aspect_ratio" ) );
451 else
452 mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
453
454 // Honour the reverse here
455 if ( mix >= 1.0 )
456 mix -= floor( mix );
457
458 mix = reverse ? 1 - mix : mix;
459 frame_delta *= reverse ? -1.0 : 1.0;
460
461 // Ensure we get scaling on the b_frame
462 mlt_properties_set( b_props, "rescale.interp", "nearest" );
463
464 if ( luma_width > 0 && luma_height > 0 && luma_bitmap != NULL )
465 // Composite the frames using a luma map
466 luma_composite( a_frame, b_frame, luma_width, luma_height, luma_bitmap, mix, frame_delta,
467 luma_softness, progressive ? -1 : top_field_first, width, height );
468 else
469 // Dissolve the frames using the time offset for mix value
470 dissolve_yuv( a_frame, b_frame, mix, *width, *height );
471
472 // Extract the a_frame image info
473 *width = mlt_properties_get_int( a_props, "width" );
474 *height = mlt_properties_get_int( a_props, "height" );
475 *image = mlt_properties_get_data( a_props, "image", NULL );
476
477 return 0;
478 }
479
480
481 /** Luma transition processing.
482 */
483
484 static mlt_frame transition_process( mlt_transition transition, mlt_frame a_frame, mlt_frame b_frame )
485 {
486 // Get a unique name to store the frame position
487 char *name = mlt_properties_get( mlt_transition_properties( transition ), "_unique_id" );
488
489 // Assign the current position to the name
490 mlt_properties_set_position( mlt_frame_properties( a_frame ), name, mlt_frame_get_position( a_frame ) );
491
492 // Push the transition on to the frame
493 mlt_frame_push_service( a_frame, transition );
494
495 // Push the b_frame on to the stack
496 mlt_frame_push_frame( a_frame, b_frame );
497
498 // Push the transition method
499 mlt_frame_push_get_image( a_frame, transition_get_image );
500
501 return a_frame;
502 }
503
504 /** Constructor for the filter.
505 */
506
507 mlt_transition transition_luma_init( char *lumafile )
508 {
509 mlt_transition transition = mlt_transition_new( );
510 if ( transition != NULL )
511 {
512 // Set the methods
513 transition->process = transition_process;
514
515 // Default factory
516 mlt_properties_set( mlt_transition_properties( transition ), "factory", "fezzik" );
517
518 // Set the main property
519 mlt_properties_set( mlt_transition_properties( transition ), "resource", lumafile );
520
521 return transition;
522 }
523 return NULL;
524 }