minor mods
[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 // 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 }