ed7de2eb212202d08d5d66e88edb2f1fe7b52da6
[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 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 b frame from the stack
338 mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
339
340 // Get the transition object
341 mlt_transition transition = mlt_frame_pop_service( a_frame );
342
343 // Get the properties of the transition
344 mlt_properties properties = mlt_transition_properties( transition );
345
346 // Get the properties of the a frame
347 mlt_properties a_props = mlt_frame_properties( 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 // Get image from the luma producer
411 mlt_properties_set( mlt_frame_properties( luma_frame ), "rescale.interp", "none" );
412 mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 );
413
414 // Generate the luma map
415 if ( luma_image != NULL && luma_format == mlt_image_yuv422 )
416 luma_read_yuv422( luma_image, &luma_bitmap, luma_width, luma_height );
417
418 else if ( luma_image != NULL && luma_format == mlt_image_rgb24 )
419 luma_read_rgb24( luma_image, &luma_bitmap, luma_width, luma_height );
420
421 // Set the transition properties
422 mlt_properties_set_int( properties, "width", luma_width );
423 mlt_properties_set_int( properties, "height", luma_height );
424 mlt_properties_set_data( properties, "bitmap", luma_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL );
425
426 // Cleanup the luma frame
427 mlt_frame_close( luma_frame );
428 }
429
430 // Cleanup the luma producer
431 mlt_producer_close( producer );
432 }
433 }
434 }
435
436 // Arbitrary composite defaults
437 float mix = position_calculate( transition, a_frame );
438 float frame_delta = delta_calculate( transition, a_frame );
439
440 float luma_softness = mlt_properties_get_double( properties, "softness" );
441 int progressive = mlt_properties_get_int( b_props, "progressive" ) ||
442 mlt_properties_get_int( a_props, "consumer_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 }