bb44d29157f0e8d510f7bb17fa075b3e918953f6
[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_frame.h>
23
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <ctype.h>
27 #include <string.h>
28 #include <math.h>
29
30 /** Luma class.
31 */
32
33 typedef struct
34 {
35 struct mlt_transition_s parent;
36 int width;
37 int height;
38 uint16_t *bitmap;
39 }
40 transition_luma;
41
42
43 // forward declarations
44 static void transition_close( mlt_transition parent );
45
46 /** Calculate the position for this frame.
47 */
48
49 static float position_calculate( mlt_transition this, mlt_frame frame )
50 {
51 // Get the in and out position
52 mlt_position in = mlt_transition_get_in( this );
53 mlt_position out = mlt_transition_get_out( this );
54
55 // Get the position of the frame
56 mlt_position position = mlt_frame_get_position( frame );
57
58 // Now do the calcs
59 return ( float )( position - in ) / ( float )( out - in + 1 );
60 }
61
62 /** Calculate the field delta for this frame - position between two frames.
63 */
64
65 static float delta_calculate( mlt_transition this, mlt_frame frame )
66 {
67 // Get the in and out position
68 mlt_position in = mlt_transition_get_in( this );
69 mlt_position out = mlt_transition_get_out( this );
70
71 // Get the position of the frame
72 mlt_position position = mlt_frame_get_position( frame );
73
74 // Now do the calcs
75 float x = ( float )( position - in ) / ( float )( out - in + 1 );
76 float y = ( float )( position + 1 - in ) / ( float )( out - in + 1 );
77
78 return ( y - x ) / 2.0;
79 }
80
81 static inline int dissolve_yuv( mlt_frame this, mlt_frame that, float weight, int width, int height )
82 {
83 int ret = 0;
84 int width_src = width, height_src = height;
85 mlt_image_format format = mlt_image_yuv422;
86 uint8_t *p_src, *p_dest;
87 uint8_t *p;
88 uint8_t *limit;
89
90 int32_t weigh = weight * ( 1 << 16 );
91 int32_t weigh_complement = ( 1 - weight ) * ( 1 << 16 );
92
93 mlt_frame_get_image( this, &p_dest, &format, &width, &height, 1 );
94 mlt_frame_get_image( that, &p_src, &format, &width_src, &height_src, 0 );
95
96 p = p_dest;
97 limit = p_dest + height_src * width_src * 2;
98
99 while ( p < limit )
100 {
101 *p_dest++ = ( *p_src++ * weigh + *p++ * weigh_complement ) >> 16;
102 *p_dest++ = ( *p_src++ * weigh + *p++ * weigh_complement ) >> 16;
103 }
104
105 return ret;
106 }
107
108 // image processing functions
109
110 static inline uint32_t smoothstep( int32_t edge1, int32_t edge2, uint32_t a )
111 {
112 if ( a < edge1 )
113 return 0;
114
115 if ( a >= edge2 )
116 return 0x10000;
117
118 a = ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 );
119
120 return ( ( ( a * a ) >> 16 ) * ( ( 3 << 16 ) - ( 2 * a ) ) ) >> 16;
121 }
122
123 /** powerful stuff
124
125 \param field_order -1 = progressive, 0 = lower field first, 1 = top field first
126 */
127 static void luma_composite( mlt_frame a_frame, mlt_frame b_frame, int luma_width, int luma_height,
128 uint16_t *luma_bitmap, float pos, float frame_delta, float softness, int field_order,
129 int *width, int *height )
130 {
131 int width_src = *width, height_src = *height;
132 int width_dest = *width, height_dest = *height;
133 mlt_image_format format_src = mlt_image_yuv422, format_dest = mlt_image_yuv422;
134 uint8_t *p_src, *p_dest;
135 int i, j;
136 int stride_src;
137 int stride_dest;
138 uint16_t weight = 0;
139
140 format_src = mlt_image_yuv422;
141 format_dest = mlt_image_yuv422;
142
143 mlt_frame_get_image( a_frame, &p_dest, &format_dest, &width_dest, &height_dest, 1 );
144 mlt_frame_get_image( b_frame, &p_src, &format_src, &width_src, &height_src, 0 );
145
146 stride_src = width_src * 2;
147 stride_dest = width_dest * 2;
148
149 // Offset the position based on which field we're looking at ...
150 int32_t field_pos[ 2 ];
151 field_pos[ 0 ] = ( pos + ( ( field_order == 0 ? 1 : 0 ) * frame_delta * 0.5 ) ) * ( 1 << 16 ) * ( 1.0 + softness );
152 field_pos[ 1 ] = ( pos + ( ( field_order == 0 ? 0 : 1 ) * frame_delta * 0.5 ) ) * ( 1 << 16 ) * ( 1.0 + softness );
153
154 register uint8_t *p;
155 register uint8_t *q;
156 register uint8_t *o;
157 uint16_t *l;
158
159 uint32_t value;
160
161 int32_t x_diff = ( luma_width << 16 ) / *width;
162 int32_t y_diff = ( luma_height << 16 ) / *height;
163 int32_t x_offset = 0;
164 int32_t y_offset = 0;
165 uint8_t *p_row;
166 uint8_t *q_row;
167
168 int32_t i_softness = softness * ( 1 << 16 );
169
170 int field_count = field_order <= 0 ? 1 : 2;
171 int field_stride_src = field_count * stride_src;
172 int field_stride_dest = field_count * stride_dest;
173
174 int field = 0;
175
176 // composite using luma map
177 while ( field < field_count )
178 {
179 p_row = p_src + field * stride_src;
180 q_row = p_dest + field * stride_dest;
181 y_offset = ( field * luma_width ) << 16;
182 i = field;
183
184 while ( i < height_src )
185 {
186 p = p_row;
187 q = q_row;
188 o = q;
189 l = luma_bitmap + ( y_offset >> 16 ) * ( luma_width * field_count );
190 x_offset = 0;
191 j = width_src;
192
193 while( j -- )
194 {
195 weight = l[ x_offset >> 16 ];
196 value = smoothstep( weight, i_softness + weight, field_pos[ field ] );
197 *o ++ = ( *p ++ * value + *q++ * ( ( 1 << 16 ) - value ) ) >> 16;
198 *o ++ = ( *p ++ * value + *q++ * ( ( 1 << 16 ) - value ) ) >> 16;
199 x_offset += x_diff;
200 }
201
202 y_offset += y_diff;
203 i += field_count;
204 p_row += field_stride_src;
205 q_row += field_stride_dest;
206 }
207
208 field ++;
209 }
210 }
211
212 /** Get the image.
213 */
214
215 static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
216 {
217 // Get the properties of the a frame
218 mlt_properties a_props = mlt_frame_properties( a_frame );
219
220 // Get the b frame from the stack
221 mlt_frame b_frame = mlt_frame_pop_frame( a_frame );
222
223 // Get the properties of the b frame
224 mlt_properties b_props = mlt_frame_properties( b_frame );
225
226 // Arbitrary composite defaults
227 float mix = mlt_properties_get_double( b_props, "image.mix" );
228 float frame_delta = mlt_properties_get_double( b_props, "luma.delta" );
229 int luma_width = mlt_properties_get_int( b_props, "luma.width" );
230 int luma_height = mlt_properties_get_int( b_props, "luma.height" );
231 uint16_t *luma_bitmap = mlt_properties_get_data( b_props, "luma.bitmap", NULL );
232 float luma_softness = mlt_properties_get_double( b_props, "luma.softness" );
233 int progressive = mlt_properties_get_int( b_props, "progressive" ) ||
234 mlt_properties_get_int( a_props, "consumer_progressive" ) ||
235 mlt_properties_get_int( b_props, "luma.progressive" );
236
237 int top_field_first = mlt_properties_get_int( b_props, "top_field_first" );
238 int reverse = mlt_properties_get_int( b_props, "luma.reverse" );
239
240 // Since we are the consumer of the b_frame, we must pass along this
241 // consumer property from the a_frame
242 mlt_properties_set_double( b_props, "consumer_aspect_ratio", mlt_properties_get_double( a_props, "consumer_aspect_ratio" ) );
243 mlt_properties_set_double( b_props, "consumer_scale", mlt_properties_get_double( a_props, "consumer_scale" ) );
244
245 // Honour the reverse here
246 if ( mix >= 1.0 )
247 mix -= floor( mix );
248
249 mix = reverse ? 1 - mix : mix;
250 frame_delta *= reverse ? -1.0 : 1.0;
251
252 // Ensure we get scaling on the b_frame
253 mlt_properties_set( b_props, "rescale.interp", "nearest" );
254
255 if ( luma_width > 0 && luma_height > 0 && luma_bitmap != NULL )
256 // Composite the frames using a luma map
257 luma_composite( a_frame, b_frame, luma_width, luma_height, luma_bitmap, mix, frame_delta,
258 luma_softness, progressive ? -1 : top_field_first, width, height );
259 else
260 // Dissolve the frames using the time offset for mix value
261 dissolve_yuv( a_frame, b_frame, mix, *width, *height );
262
263 // Extract the a_frame image info
264 *width = mlt_properties_get_int( a_props, "width" );
265 *height = mlt_properties_get_int( a_props, "height" );
266 *image = mlt_properties_get_data( a_props, "image", NULL );
267
268 return 0;
269 }
270
271 /** Load the luma map from PGM stream.
272 */
273
274 static void luma_read_pgm( FILE *f, uint16_t **map, int *width, int *height )
275 {
276 uint8_t *data = NULL;
277 while (1)
278 {
279 char line[128];
280 int i = 2;
281 int maxval;
282 int bpp;
283 uint16_t *p;
284
285 line[127] = '\0';
286
287 // get the magic code
288 if ( fgets( line, 127, f ) == NULL )
289 break;
290 if ( line[0] != 'P' || line[1] != '5' )
291 break;
292
293 // skip white space and see if a new line must be fetched
294 for ( i = 2; i < 127 && line[i] != '\0' && isspace( line[i] ); i++ );
295 if ( line[i] == '\0' && fgets( line, 127, f ) == NULL )
296 break;
297
298 // get the dimensions
299 if ( line[0] == 'P' )
300 i = sscanf( line, "P5 %d %d %d", width, height, &maxval );
301 else
302 i = sscanf( line, "%d %d %d", width, height, &maxval );
303
304 // get the height value, if not yet
305 if ( i < 2 )
306 {
307 if ( fgets( line, 127, f ) == NULL )
308 break;
309 i = sscanf( line, "%d", height );
310 if ( i == 0 )
311 break;
312 else
313 i = 2;
314 }
315
316 // get the maximum gray value, if not yet
317 if ( i < 3 )
318 {
319 if ( fgets( line, 127, f ) == NULL )
320 break;
321 i = sscanf( line, "%d", &maxval );
322 if ( i == 0 )
323 break;
324 }
325
326 // determine if this is one or two bytes per pixel
327 bpp = maxval > 255 ? 2 : 1;
328
329 // allocate temporary storage for the raw data
330 data = mlt_pool_alloc( *width * *height * bpp );
331 if ( data == NULL )
332 break;
333
334 // read the raw data
335 if ( fread( data, *width * *height * bpp, 1, f ) != 1 )
336 break;
337
338 // allocate the luma bitmap
339 *map = p = (uint16_t*)mlt_pool_alloc( *width * *height * sizeof( uint16_t ) );
340 if ( *map == NULL )
341 break;
342
343 // proces the raw data into the luma bitmap
344 for ( i = 0; i < *width * *height * bpp; i += bpp )
345 {
346 if ( bpp == 1 )
347 *p++ = data[ i ] << 8;
348 else
349 *p++ = ( data[ i ] << 8 ) + data[ i+1 ];
350 }
351
352 break;
353 }
354
355 if ( data != NULL )
356 mlt_pool_release( data );
357 }
358
359
360 /** Luma transition processing.
361 */
362
363 static mlt_frame transition_process( mlt_transition transition, mlt_frame a_frame, mlt_frame b_frame )
364 {
365 transition_luma *this = (transition_luma*) transition->child;
366
367 // Get the properties of the transition
368 mlt_properties properties = mlt_transition_properties( transition );
369
370 // Get the properties of the b frame
371 mlt_properties b_props = mlt_frame_properties( b_frame );
372
373 // If the filename property changed, reload the map
374 char *lumafile = mlt_properties_get( properties, "resource" );
375 if ( this->bitmap == NULL && lumafile != NULL )
376 {
377 FILE *pipe = fopen( lumafile, "r" );
378 if ( pipe != NULL )
379 {
380 luma_read_pgm( pipe, &this->bitmap, &this->width, &this->height );
381 fclose( pipe );
382 }
383 }
384
385 // Set the b frame properties
386 mlt_properties_set_double( b_props, "image.mix", position_calculate( transition, a_frame ) );
387 mlt_properties_set_double( b_props, "luma.delta", delta_calculate( transition, a_frame ) );
388 mlt_properties_set_int( b_props, "luma.width", this->width );
389 mlt_properties_set_int( b_props, "luma.height", this->height );
390 mlt_properties_set_data( b_props, "luma.bitmap", this->bitmap, 0, NULL, NULL );
391 mlt_properties_set_int( b_props, "luma.reverse", mlt_properties_get_int( properties, "reverse" ) );
392 mlt_properties_set_double( b_props, "luma.softness", mlt_properties_get_double( properties, "softness" ) );
393
394 mlt_frame_push_get_image( a_frame, transition_get_image );
395 mlt_frame_push_frame( a_frame, b_frame );
396
397 return a_frame;
398 }
399
400 /** Constructor for the filter.
401 */
402
403 mlt_transition transition_luma_init( char *lumafile )
404 {
405 transition_luma *this = calloc( sizeof( transition_luma ), 1 );
406 if ( this != NULL )
407 {
408 mlt_transition transition = &this->parent;
409 mlt_transition_init( transition, this );
410 transition->process = transition_process;
411 transition->close = transition_close;
412 mlt_properties_set( mlt_transition_properties( transition ), "resource", lumafile );
413 return &this->parent;
414 }
415 return NULL;
416 }
417
418 /** Close the transition.
419 */
420
421 static void transition_close( mlt_transition parent )
422 {
423 transition_luma *this = (transition_luma*) parent->child;
424 mlt_pool_release( this->bitmap );
425 free( this );
426 }
427