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[melted] / src / framework / mlt_frame.c
1 /**
2 * \file mlt_frame.c
3 * \brief interface for all frame classes
4 * \see mlt_frame_s
5 *
6 * Copyright (C) 2003-2009 Ushodaya Enterprises Limited
7 * \author Charles Yates <charles.yates@pandora.be>
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23
24 #include "mlt_frame.h"
25 #include "mlt_producer.h"
26 #include "mlt_factory.h"
27 #include "mlt_profile.h"
28
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <math.h>
33
34 /** Constructor for a frame.
35 */
36
37 mlt_frame mlt_frame_init( mlt_service service )
38 {
39 // Allocate a frame
40 mlt_frame this = calloc( sizeof( struct mlt_frame_s ), 1 );
41
42 if ( this != NULL )
43 {
44 mlt_profile profile = mlt_service_profile( service );
45
46 // Initialise the properties
47 mlt_properties properties = &this->parent;
48 mlt_properties_init( properties, this );
49
50 // Set default properties on the frame
51 mlt_properties_set_position( properties, "_position", 0.0 );
52 mlt_properties_set_data( properties, "image", NULL, 0, NULL, NULL );
53 mlt_properties_set_int( properties, "width", profile? profile->width : 720 );
54 mlt_properties_set_int( properties, "height", profile? profile->height : 576 );
55 mlt_properties_set_int( properties, "normalised_width", profile? profile->width : 720 );
56 mlt_properties_set_int( properties, "normalised_height", profile? profile->height : 576 );
57 mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( NULL ) );
58 mlt_properties_set_data( properties, "audio", NULL, 0, NULL, NULL );
59 mlt_properties_set_data( properties, "alpha", NULL, 0, NULL, NULL );
60
61 // Construct stacks for frames and methods
62 this->stack_image = mlt_deque_init( );
63 this->stack_audio = mlt_deque_init( );
64 this->stack_service = mlt_deque_init( );
65 }
66
67 return this;
68 }
69
70 /** Fetch the frames properties.
71 */
72
73 mlt_properties mlt_frame_properties( mlt_frame this )
74 {
75 return this != NULL ? &this->parent : NULL;
76 }
77
78 /** Check if we have a way to derive something other than a test card.
79 */
80
81 int mlt_frame_is_test_card( mlt_frame this )
82 {
83 return mlt_deque_count( this->stack_image ) == 0 || mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "test_image" );
84 }
85
86 /** Check if we have a way to derive something other than test audio.
87 */
88
89 int mlt_frame_is_test_audio( mlt_frame this )
90 {
91 return mlt_deque_count( this->stack_audio ) == 0 || mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "test_audio" );
92 }
93
94 /** Get the aspect ratio of the frame.
95 */
96
97 double mlt_frame_get_aspect_ratio( mlt_frame this )
98 {
99 return mlt_properties_get_double( MLT_FRAME_PROPERTIES( this ), "aspect_ratio" );
100 }
101
102 /** Set the aspect ratio of the frame.
103 */
104
105 int mlt_frame_set_aspect_ratio( mlt_frame this, double value )
106 {
107 return mlt_properties_set_double( MLT_FRAME_PROPERTIES( this ), "aspect_ratio", value );
108 }
109
110 /** Get the position of this frame.
111 */
112
113 mlt_position mlt_frame_get_position( mlt_frame this )
114 {
115 int pos = mlt_properties_get_position( MLT_FRAME_PROPERTIES( this ), "_position" );
116 return pos < 0 ? 0 : pos;
117 }
118
119 /** Set the position of this frame.
120 */
121
122 int mlt_frame_set_position( mlt_frame this, mlt_position value )
123 {
124 return mlt_properties_set_position( MLT_FRAME_PROPERTIES( this ), "_position", value );
125 }
126
127 /** Stack a get_image callback.
128 */
129
130 int mlt_frame_push_get_image( mlt_frame this, mlt_get_image get_image )
131 {
132 return mlt_deque_push_back( this->stack_image, get_image );
133 }
134
135 /** Pop a get_image callback.
136 */
137
138 mlt_get_image mlt_frame_pop_get_image( mlt_frame this )
139 {
140 return mlt_deque_pop_back( this->stack_image );
141 }
142
143 /** Push a frame.
144 */
145
146 int mlt_frame_push_frame( mlt_frame this, mlt_frame that )
147 {
148 return mlt_deque_push_back( this->stack_image, that );
149 }
150
151 /** Pop a frame.
152 */
153
154 mlt_frame mlt_frame_pop_frame( mlt_frame this )
155 {
156 return mlt_deque_pop_back( this->stack_image );
157 }
158
159 /** Push a service.
160 */
161
162 int mlt_frame_push_service( mlt_frame this, void *that )
163 {
164 return mlt_deque_push_back( this->stack_image, that );
165 }
166
167 /** Pop a service.
168 */
169
170 void *mlt_frame_pop_service( mlt_frame this )
171 {
172 return mlt_deque_pop_back( this->stack_image );
173 }
174
175 /** Push a service.
176 */
177
178 int mlt_frame_push_service_int( mlt_frame this, int that )
179 {
180 return mlt_deque_push_back_int( this->stack_image, that );
181 }
182
183 /** Pop a service.
184 */
185
186 int mlt_frame_pop_service_int( mlt_frame this )
187 {
188 return mlt_deque_pop_back_int( this->stack_image );
189 }
190
191 /** Push an audio item on the stack.
192 */
193
194 int mlt_frame_push_audio( mlt_frame this, void *that )
195 {
196 return mlt_deque_push_back( this->stack_audio, that );
197 }
198
199 /** Pop an audio item from the stack
200 */
201
202 void *mlt_frame_pop_audio( mlt_frame this )
203 {
204 return mlt_deque_pop_back( this->stack_audio );
205 }
206
207 /** Return the service stack
208 */
209
210 mlt_deque mlt_frame_service_stack( mlt_frame this )
211 {
212 return this->stack_service;
213 }
214
215 /** Replace image stack with the information provided.
216
217 This might prove to be unreliable and restrictive - the idea is that a transition
218 which normally uses two images may decide to only use the b frame (ie: in the case
219 of a composite where the b frame completely obscures the a frame).
220
221 The image must be writable and the destructor for the image itself must be taken
222 care of on another frame and that frame cannot have a replace applied to it...
223 Further it assumes that no alpha mask is in use.
224
225 For these reasons, it can only be used in a specific situation - when you have
226 multiple tracks each with their own transition and these transitions are applied
227 in a strictly reversed order (ie: highest numbered [lowest track] is processed
228 first).
229
230 More reliable approach - the cases should be detected during the process phase
231 and the upper tracks should simply not be invited to stack...
232 */
233
234 void mlt_frame_replace_image( mlt_frame this, uint8_t *image, mlt_image_format format, int width, int height )
235 {
236 // Remove all items from the stack
237 while( mlt_deque_pop_back( this->stack_image ) ) ;
238
239 // Update the information
240 mlt_properties_set_data( MLT_FRAME_PROPERTIES( this ), "image", image, 0, NULL, NULL );
241 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "width", width );
242 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "height", height );
243 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "format", format );
244 this->get_alpha_mask = NULL;
245 }
246
247 /** Get the image associated to the frame.
248 */
249
250 int mlt_frame_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
251 {
252 mlt_properties properties = MLT_FRAME_PROPERTIES( this );
253 mlt_get_image get_image = mlt_frame_pop_get_image( this );
254 mlt_producer producer = mlt_properties_get_data( properties, "test_card_producer", NULL );
255 int error = 0;
256
257 if ( get_image != NULL )
258 {
259 mlt_properties_set_int( properties, "image_count", mlt_properties_get_int( properties, "image_count" ) - 1 );
260 mlt_position position = mlt_frame_get_position( this );
261 error = get_image( this, buffer, format, width, height, writable );
262 mlt_properties_set_int( properties, "width", *width );
263 mlt_properties_set_int( properties, "height", *height );
264 mlt_properties_set_int( properties, "format", *format );
265 mlt_frame_set_position( this, position );
266 }
267 else if ( mlt_properties_get_data( properties, "image", NULL ) != NULL )
268 {
269 *format = mlt_properties_get_int( properties, "format" );
270 *buffer = mlt_properties_get_data( properties, "image", NULL );
271 *width = mlt_properties_get_int( properties, "width" );
272 *height = mlt_properties_get_int( properties, "height" );
273 }
274 else if ( producer != NULL )
275 {
276 mlt_frame test_frame = NULL;
277 mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &test_frame, 0 );
278 if ( test_frame != NULL )
279 {
280 mlt_properties test_properties = MLT_FRAME_PROPERTIES( test_frame );
281 mlt_properties_set_double( test_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "consumer_aspect_ratio" ) );
282 mlt_properties_set( test_properties, "rescale.interp", mlt_properties_get( properties, "rescale.interp" ) );
283 mlt_frame_get_image( test_frame, buffer, format, width, height, writable );
284 mlt_properties_set_data( properties, "test_card_frame", test_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
285 mlt_properties_set_data( properties, "image", *buffer, *width * *height * 2, NULL, NULL );
286 mlt_properties_set_int( properties, "width", *width );
287 mlt_properties_set_int( properties, "height", *height );
288 mlt_properties_set_int( properties, "format", *format );
289 mlt_properties_set_double( properties, "aspect_ratio", mlt_frame_get_aspect_ratio( test_frame ) );
290 }
291 else
292 {
293 mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
294 mlt_frame_get_image( this, buffer, format, width, height, writable );
295 }
296 }
297 else
298 {
299 register uint8_t *p;
300 register uint8_t *q;
301 int size = 0;
302
303 *width = *width == 0 ? 720 : *width;
304 *height = *height == 0 ? 576 : *height;
305 size = *width * *height;
306
307 mlt_properties_set_int( properties, "format", *format );
308 mlt_properties_set_int( properties, "width", *width );
309 mlt_properties_set_int( properties, "height", *height );
310 mlt_properties_set_int( properties, "aspect_ratio", 0 );
311
312 switch( *format )
313 {
314 case mlt_image_none:
315 size = 0;
316 *buffer = NULL;
317 break;
318 case mlt_image_rgb24:
319 size *= 3;
320 size += *width * 3;
321 *buffer = mlt_pool_alloc( size );
322 if ( *buffer )
323 memset( *buffer, 255, size );
324 break;
325 case mlt_image_rgb24a:
326 case mlt_image_opengl:
327 size *= 4;
328 size += *width * 4;
329 *buffer = mlt_pool_alloc( size );
330 if ( *buffer )
331 memset( *buffer, 255, size );
332 break;
333 case mlt_image_yuv422:
334 size *= 2;
335 size += *width * 2;
336 *buffer = mlt_pool_alloc( size );
337 p = *buffer;
338 q = p + size;
339 while ( p != NULL && p != q )
340 {
341 *p ++ = 235;
342 *p ++ = 128;
343 }
344 break;
345 case mlt_image_yuv420p:
346 size = size * 3 / 2;
347 *buffer = mlt_pool_alloc( size );
348 if ( *buffer )
349 memset( *buffer, 255, size );
350 break;
351 }
352
353 mlt_properties_set_data( properties, "image", *buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
354 mlt_properties_set_int( properties, "test_image", 1 );
355 }
356
357 mlt_properties_set_int( properties, "scaled_width", *width );
358 mlt_properties_set_int( properties, "scaled_height", *height );
359
360 return error;
361 }
362
363 uint8_t *mlt_frame_get_alpha_mask( mlt_frame this )
364 {
365 uint8_t *alpha = NULL;
366 if ( this != NULL )
367 {
368 if ( this->get_alpha_mask != NULL )
369 alpha = this->get_alpha_mask( this );
370 if ( alpha == NULL )
371 alpha = mlt_properties_get_data( &this->parent, "alpha", NULL );
372 if ( alpha == NULL )
373 {
374 int size = mlt_properties_get_int( &this->parent, "scaled_width" ) * mlt_properties_get_int( &this->parent, "scaled_height" );
375 alpha = mlt_pool_alloc( size );
376 memset( alpha, 255, size );
377 mlt_properties_set_data( &this->parent, "alpha", alpha, size, mlt_pool_release, NULL );
378 }
379 }
380 return alpha;
381 }
382
383 int mlt_frame_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
384 {
385 mlt_get_audio get_audio = mlt_frame_pop_audio( this );
386 mlt_properties properties = MLT_FRAME_PROPERTIES( this );
387 int hide = mlt_properties_get_int( properties, "test_audio" );
388
389 if ( hide == 0 && get_audio != NULL )
390 {
391 mlt_position position = mlt_frame_get_position( this );
392 get_audio( this, buffer, format, frequency, channels, samples );
393 mlt_frame_set_position( this, position );
394 }
395 else if ( mlt_properties_get_data( properties, "audio", NULL ) )
396 {
397 *buffer = mlt_properties_get_data( properties, "audio", NULL );
398 *frequency = mlt_properties_get_int( properties, "audio_frequency" );
399 *channels = mlt_properties_get_int( properties, "audio_channels" );
400 *samples = mlt_properties_get_int( properties, "audio_samples" );
401 }
402 else
403 {
404 int size = 0;
405 *samples = *samples <= 0 ? 1920 : *samples;
406 *channels = *channels <= 0 ? 2 : *channels;
407 *frequency = *frequency <= 0 ? 48000 : *frequency;
408 size = *samples * *channels * sizeof( int16_t );
409 *buffer = mlt_pool_alloc( size );
410 if ( *buffer != NULL )
411 memset( *buffer, 0, size );
412 mlt_properties_set_data( properties, "audio", *buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
413 mlt_properties_set_int( properties, "test_audio", 1 );
414 }
415
416 mlt_properties_set_int( properties, "audio_frequency", *frequency );
417 mlt_properties_set_int( properties, "audio_channels", *channels );
418 mlt_properties_set_int( properties, "audio_samples", *samples );
419
420 if ( mlt_properties_get( properties, "meta.volume" ) )
421 {
422 double value = mlt_properties_get_double( properties, "meta.volume" );
423
424 if ( value == 0.0 )
425 {
426 memset( *buffer, 0, *samples * *channels * 2 );
427 }
428 else if ( value != 1.0 )
429 {
430 int total = *samples * *channels;
431 int16_t *p = *buffer;
432 while ( total -- )
433 {
434 *p = *p * value;
435 p ++;
436 }
437 }
438
439 mlt_properties_set( properties, "meta.volume", NULL );
440 }
441
442 return 0;
443 }
444
445 unsigned char *mlt_frame_get_waveform( mlt_frame this, int w, int h )
446 {
447 int16_t *pcm = NULL;
448 mlt_properties properties = MLT_FRAME_PROPERTIES( this );
449 mlt_audio_format format = mlt_audio_pcm;
450 int frequency = 32000; // lower frequency available?
451 int channels = 2;
452 double fps = mlt_profile_fps( NULL );
453 int samples = mlt_sample_calculator( fps, frequency, mlt_frame_get_position( this ) );
454
455 // Get the pcm data
456 mlt_frame_get_audio( this, &pcm, &format, &frequency, &channels, &samples );
457
458 // Make an 8-bit buffer large enough to hold rendering
459 int size = w * h;
460 unsigned char *bitmap = ( unsigned char* )mlt_pool_alloc( size );
461 if ( bitmap != NULL )
462 memset( bitmap, 0, size );
463 mlt_properties_set_data( properties, "waveform", bitmap, size, ( mlt_destructor )mlt_pool_release, NULL );
464
465 // Render vertical lines
466 int16_t *ubound = pcm + samples * channels;
467 int skip = samples / w - 1;
468 int i, j, k;
469
470 // Iterate sample stream and along x coordinate
471 for ( i = 0; i < w && pcm < ubound; i++ )
472 {
473 // pcm data has channels interleaved
474 for ( j = 0; j < channels; j++ )
475 {
476 // Determine sample's magnitude from 2s complement;
477 int pcm_magnitude = *pcm < 0 ? ~(*pcm) + 1 : *pcm;
478 // The height of a line is the ratio of the magnitude multiplied by
479 // half the vertical resolution
480 int height = ( int )( ( double )( pcm_magnitude ) / 32768 * h / 2 );
481 // Determine the starting y coordinate - left channel above center,
482 // right channel below - currently assumes 2 channels
483 int displacement = ( h / 2 ) - ( 1 - j ) * height;
484 // Position buffer pointer using y coordinate, stride, and x coordinate
485 unsigned char *p = &bitmap[ i + displacement * w ];
486
487 // Draw vertical line
488 for ( k = 0; k < height; k++ )
489 p[ w * k ] = 0xFF;
490
491 pcm++;
492 }
493 pcm += skip * channels;
494 }
495
496 return bitmap;
497 }
498
499 mlt_producer mlt_frame_get_original_producer( mlt_frame this )
500 {
501 if ( this != NULL )
502 return mlt_properties_get_data( MLT_FRAME_PROPERTIES( this ), "_producer", NULL );
503 return NULL;
504 }
505
506 void mlt_frame_close( mlt_frame this )
507 {
508 if ( this != NULL && mlt_properties_dec_ref( MLT_FRAME_PROPERTIES( this ) ) <= 0 )
509 {
510 mlt_deque_close( this->stack_image );
511 mlt_deque_close( this->stack_audio );
512 while( mlt_deque_peek_back( this->stack_service ) )
513 mlt_service_close( mlt_deque_pop_back( this->stack_service ) );
514 mlt_deque_close( this->stack_service );
515 mlt_properties_close( &this->parent );
516 free( this );
517 }
518 }
519
520 /***** convenience functions *****/
521
522 int mlt_convert_yuv422_to_rgb24a( uint8_t *yuv, uint8_t *rgba, unsigned int total )
523 {
524 int ret = 0;
525 int yy, uu, vv;
526 int r,g,b;
527 total /= 2;
528 while (total--)
529 {
530 yy = yuv[0];
531 uu = yuv[1];
532 vv = yuv[3];
533 YUV2RGB(yy, uu, vv, r, g, b);
534 rgba[0] = r;
535 rgba[1] = g;
536 rgba[2] = b;
537 rgba[3] = 255;
538 yy = yuv[2];
539 YUV2RGB(yy, uu, vv, r, g, b);
540 rgba[4] = r;
541 rgba[5] = g;
542 rgba[6] = b;
543 rgba[7] = 255;
544 yuv += 4;
545 rgba += 8;
546 }
547 return ret;
548 }
549
550 int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha )
551 {
552 int ret = 0;
553 register int y0, y1, u0, u1, v0, v1;
554 register int r, g, b;
555 register uint8_t *d = yuv;
556 register int i, j;
557
558 if ( alpha )
559 for ( i = 0; i < height; i++ )
560 {
561 register uint8_t *s = rgba + ( stride * i );
562 for ( j = 0; j < ( width / 2 ); j++ )
563 {
564 r = *s++;
565 g = *s++;
566 b = *s++;
567 *alpha++ = *s++;
568 RGB2YUV (r, g, b, y0, u0 , v0);
569 r = *s++;
570 g = *s++;
571 b = *s++;
572 *alpha++ = *s++;
573 RGB2YUV (r, g, b, y1, u1 , v1);
574 *d++ = y0;
575 *d++ = (u0+u1) >> 1;
576 *d++ = y1;
577 *d++ = (v0+v1) >> 1;
578 }
579 if ( width % 2 )
580 {
581 r = *s++;
582 g = *s++;
583 b = *s++;
584 *alpha++ = *s++;
585 RGB2YUV (r, g, b, y0, u0 , v0);
586 *d++ = y0;
587 *d++ = u0;
588 }
589 }
590 else
591 for ( i = 0; i < height; i++ )
592 {
593 register uint8_t *s = rgba + ( stride * i );
594 for ( j = 0; j < ( width / 2 ); j++ )
595 {
596 r = *s++;
597 g = *s++;
598 b = *s++;
599 s++;
600 RGB2YUV (r, g, b, y0, u0 , v0);
601 r = *s++;
602 g = *s++;
603 b = *s++;
604 s++;
605 RGB2YUV (r, g, b, y1, u1 , v1);
606 *d++ = y0;
607 *d++ = (u0+u1) >> 1;
608 *d++ = y1;
609 *d++ = (v0+v1) >> 1;
610 }
611 if ( width % 2 )
612 {
613 r = *s++;
614 g = *s++;
615 b = *s++;
616 s++;
617 RGB2YUV (r, g, b, y0, u0 , v0);
618 *d++ = y0;
619 *d++ = u0;
620 }
621 }
622
623 return ret;
624 }
625
626 int mlt_convert_rgb24_to_yuv422( uint8_t *rgb, int width, int height, int stride, uint8_t *yuv )
627 {
628 int ret = 0;
629 register int y0, y1, u0, u1, v0, v1;
630 register int r, g, b;
631 register uint8_t *d = yuv;
632 register int i, j;
633
634 for ( i = 0; i < height; i++ )
635 {
636 register uint8_t *s = rgb + ( stride * i );
637 for ( j = 0; j < ( width / 2 ); j++ )
638 {
639 r = *s++;
640 g = *s++;
641 b = *s++;
642 RGB2YUV (r, g, b, y0, u0 , v0);
643 r = *s++;
644 g = *s++;
645 b = *s++;
646 RGB2YUV (r, g, b, y1, u1 , v1);
647 *d++ = y0;
648 *d++ = (u0+u1) >> 1;
649 *d++ = y1;
650 *d++ = (v0+v1) >> 1;
651 }
652 if ( width % 2 )
653 {
654 r = *s++;
655 g = *s++;
656 b = *s++;
657 RGB2YUV (r, g, b, y0, u0 , v0);
658 *d++ = y0;
659 *d++ = u0;
660 }
661 }
662 return ret;
663 }
664
665 int mlt_convert_bgr24a_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha )
666 {
667 int ret = 0;
668 register int y0, y1, u0, u1, v0, v1;
669 register int r, g, b;
670 register uint8_t *d = yuv;
671 register int i, j;
672
673 if ( alpha )
674 for ( i = 0; i < height; i++ )
675 {
676 register uint8_t *s = rgba + ( stride * i );
677 for ( j = 0; j < ( width / 2 ); j++ )
678 {
679 b = *s++;
680 g = *s++;
681 r = *s++;
682 *alpha++ = *s++;
683 RGB2YUV (r, g, b, y0, u0 , v0);
684 b = *s++;
685 g = *s++;
686 r = *s++;
687 *alpha++ = *s++;
688 RGB2YUV (r, g, b, y1, u1 , v1);
689 *d++ = y0;
690 *d++ = (u0+u1) >> 1;
691 *d++ = y1;
692 *d++ = (v0+v1) >> 1;
693 }
694 if ( width % 2 )
695 {
696 b = *s++;
697 g = *s++;
698 r = *s++;
699 *alpha++ = *s++;
700 RGB2YUV (r, g, b, y0, u0 , v0);
701 *d++ = y0;
702 *d++ = u0;
703 }
704 }
705 else
706 for ( i = 0; i < height; i++ )
707 {
708 register uint8_t *s = rgba + ( stride * i );
709 for ( j = 0; j < ( width / 2 ); j++ )
710 {
711 b = *s++;
712 g = *s++;
713 r = *s++;
714 s++;
715 RGB2YUV (r, g, b, y0, u0 , v0);
716 b = *s++;
717 g = *s++;
718 r = *s++;
719 s++;
720 RGB2YUV (r, g, b, y1, u1 , v1);
721 *d++ = y0;
722 *d++ = (u0+u1) >> 1;
723 *d++ = y1;
724 *d++ = (v0+v1) >> 1;
725 }
726 if ( width % 2 )
727 {
728 b = *s++;
729 g = *s++;
730 r = *s++;
731 s++;
732 RGB2YUV (r, g, b, y0, u0 , v0);
733 *d++ = y0;
734 *d++ = u0;
735 }
736 }
737 return ret;
738 }
739
740 int mlt_convert_bgr24_to_yuv422( uint8_t *rgb, int width, int height, int stride, uint8_t *yuv )
741 {
742 int ret = 0;
743 register int y0, y1, u0, u1, v0, v1;
744 register int r, g, b;
745 register uint8_t *d = yuv;
746 register int i, j;
747
748 for ( i = 0; i < height; i++ )
749 {
750 register uint8_t *s = rgb + ( stride * i );
751 for ( j = 0; j < ( width / 2 ); j++ )
752 {
753 b = *s++;
754 g = *s++;
755 r = *s++;
756 RGB2YUV (r, g, b, y0, u0 , v0);
757 b = *s++;
758 g = *s++;
759 r = *s++;
760 RGB2YUV (r, g, b, y1, u1 , v1);
761 *d++ = y0;
762 *d++ = (u0+u1) >> 1;
763 *d++ = y1;
764 *d++ = (v0+v1) >> 1;
765 }
766 if ( width % 2 )
767 {
768 b = *s++;
769 g = *s++;
770 r = *s++;
771 RGB2YUV (r, g, b, y0, u0 , v0);
772 *d++ = y0;
773 *d++ = u0;
774 }
775 }
776 return ret;
777 }
778
779 int mlt_convert_argb_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha )
780 {
781 int ret = 0;
782 register int y0, y1, u0, u1, v0, v1;
783 register int r, g, b;
784 register uint8_t *d = yuv;
785 register int i, j;
786
787 if ( alpha )
788 for ( i = 0; i < height; i++ )
789 {
790 register uint8_t *s = rgba + ( stride * i );
791 for ( j = 0; j < ( width / 2 ); j++ )
792 {
793 *alpha++ = *s++;
794 r = *s++;
795 g = *s++;
796 b = *s++;
797 RGB2YUV (r, g, b, y0, u0 , v0);
798 *alpha++ = *s++;
799 r = *s++;
800 g = *s++;
801 b = *s++;
802 RGB2YUV (r, g, b, y1, u1 , v1);
803 *d++ = y0;
804 *d++ = (u0+u1) >> 1;
805 *d++ = y1;
806 *d++ = (v0+v1) >> 1;
807 }
808 if ( width % 2 )
809 {
810 *alpha++ = *s++;
811 r = *s++;
812 g = *s++;
813 b = *s++;
814 RGB2YUV (r, g, b, y0, u0 , v0);
815 *d++ = y0;
816 *d++ = u0;
817 }
818 }
819 else
820 for ( i = 0; i < height; i++ )
821 {
822 register uint8_t *s = rgba + ( stride * i );
823 for ( j = 0; j < ( width / 2 ); j++ )
824 {
825 s++;
826 r = *s++;
827 g = *s++;
828 b = *s++;
829 RGB2YUV (r, g, b, y0, u0 , v0);
830 s++;
831 r = *s++;
832 g = *s++;
833 b = *s++;
834 RGB2YUV (r, g, b, y1, u1 , v1);
835 *d++ = y0;
836 *d++ = (u0+u1) >> 1;
837 *d++ = y1;
838 *d++ = (v0+v1) >> 1;
839 }
840 if ( width % 2 )
841 {
842 s++;
843 r = *s++;
844 g = *s++;
845 b = *s++;
846 RGB2YUV (r, g, b, y0, u0 , v0);
847 *d++ = y0;
848 *d++ = u0;
849 }
850 }
851 return ret;
852 }
853
854 int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p, int width, int height, int stride, uint8_t *yuv )
855 {
856 int ret = 0;
857 register int i, j;
858
859 int half = width >> 1;
860
861 uint8_t *Y = yuv420p;
862 uint8_t *U = Y + width * height;
863 uint8_t *V = U + width * height / 4;
864
865 register uint8_t *d = yuv;
866
867 for ( i = 0; i < height; i++ )
868 {
869 register uint8_t *u = U + ( i / 2 ) * ( half );
870 register uint8_t *v = V + ( i / 2 ) * ( half );
871
872 for ( j = 0; j < half; j++ )
873 {
874 *d ++ = *Y ++;
875 *d ++ = *u ++;
876 *d ++ = *Y ++;
877 *d ++ = *v ++;
878 }
879 }
880 return ret;
881 }
882
883 uint8_t *mlt_resize_alpha( uint8_t *input, int owidth, int oheight, int iwidth, int iheight, uint8_t alpha_value )
884 {
885 uint8_t *output = NULL;
886
887 if ( input != NULL && ( iwidth != owidth || iheight != oheight ) && ( owidth > 6 && oheight > 6 ) )
888 {
889 uint8_t *out_line;
890 int offset_x = ( owidth - iwidth ) / 2;
891 int offset_y = ( oheight - iheight ) / 2;
892 int iused = iwidth;
893
894 output = mlt_pool_alloc( owidth * oheight );
895 memset( output, alpha_value, owidth * oheight );
896
897 offset_x -= offset_x % 2;
898
899 out_line = output + offset_y * owidth;
900 out_line += offset_x;
901
902 // Loop for the entirety of our output height.
903 while ( iheight -- )
904 {
905 // We're in the input range for this row.
906 memcpy( out_line, input, iused );
907
908 // Move to next input line
909 input += iwidth;
910
911 // Move to next output line
912 out_line += owidth;
913 }
914 }
915
916 return output;
917 }
918
919 void mlt_resize_yuv422( uint8_t *output, int owidth, int oheight, uint8_t *input, int iwidth, int iheight )
920 {
921 // Calculate strides
922 int istride = iwidth * 2;
923 int ostride = owidth * 2;
924 int offset_x = ( owidth - iwidth );
925 int offset_y = ( oheight - iheight ) / 2;
926 uint8_t *in_line = input;
927 uint8_t *out_line;
928 int size = owidth * oheight;
929 uint8_t *p = output;
930
931 // Optimisation point
932 if ( output == NULL || input == NULL || ( owidth <= 6 || oheight <= 6 || iwidth <= 6 || oheight <= 6 ) )
933 {
934 return;
935 }
936 else if ( iwidth == owidth && iheight == oheight )
937 {
938 memcpy( output, input, iheight * istride );
939 return;
940 }
941
942 while( size -- )
943 {
944 *p ++ = 16;
945 *p ++ = 128;
946 }
947
948 offset_x -= offset_x % 4;
949
950 out_line = output + offset_y * ostride;
951 out_line += offset_x;
952
953 // Loop for the entirety of our output height.
954 while ( iheight -- )
955 {
956 // We're in the input range for this row.
957 memcpy( out_line, in_line, iwidth * 2 );
958
959 // Move to next input line
960 in_line += istride;
961
962 // Move to next output line
963 out_line += ostride;
964 }
965 }
966
967 /** A resizing function for yuv422 frames - this does not rescale, but simply
968 resizes. It assumes yuv422 images available on the frame so use with care.
969 */
970
971 uint8_t *mlt_frame_resize_yuv422( mlt_frame this, int owidth, int oheight )
972 {
973 // Get properties
974 mlt_properties properties = MLT_FRAME_PROPERTIES( this );
975
976 // Get the input image, width and height
977 uint8_t *input = mlt_properties_get_data( properties, "image", NULL );
978 uint8_t *alpha = mlt_frame_get_alpha_mask( this );
979
980 int iwidth = mlt_properties_get_int( properties, "width" );
981 int iheight = mlt_properties_get_int( properties, "height" );
982
983 // If width and height are correct, don't do anything
984 if ( iwidth != owidth || iheight != oheight )
985 {
986 uint8_t alpha_value = mlt_properties_get_int( properties, "resize_alpha" );
987
988 // Create the output image
989 uint8_t *output = mlt_pool_alloc( owidth * ( oheight + 1 ) * 2 );
990
991 // Call the generic resize
992 mlt_resize_yuv422( output, owidth, oheight, input, iwidth, iheight );
993
994 // Now update the frame
995 mlt_properties_set_data( properties, "image", output, owidth * ( oheight + 1 ) * 2, ( mlt_destructor )mlt_pool_release, NULL );
996 mlt_properties_set_int( properties, "width", owidth );
997 mlt_properties_set_int( properties, "height", oheight );
998
999 // We should resize the alpha too
1000 alpha = mlt_resize_alpha( alpha, owidth, oheight, iwidth, iheight, alpha_value );
1001 if ( alpha != NULL )
1002 {
1003 mlt_properties_set_data( properties, "alpha", alpha, owidth * oheight, ( mlt_destructor )mlt_pool_release, NULL );
1004 this->get_alpha_mask = NULL;
1005 }
1006
1007 // Return the output
1008 return output;
1009 }
1010 // No change, return input
1011 return input;
1012 }
1013
1014 /** A rescaling function for yuv422 frames - low quality, and provided for testing
1015 only. It assumes yuv422 images available on the frame so use with care.
1016 */
1017
1018 uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight )
1019 {
1020 // Get properties
1021 mlt_properties properties = MLT_FRAME_PROPERTIES( this );
1022
1023 // Get the input image, width and height
1024 uint8_t *input = mlt_properties_get_data( properties, "image", NULL );
1025 int iwidth = mlt_properties_get_int( properties, "width" );
1026 int iheight = mlt_properties_get_int( properties, "height" );
1027
1028 // If width and height are correct, don't do anything
1029 if ( iwidth != owidth || iheight != oheight )
1030 {
1031 // Create the output image
1032 uint8_t *output = mlt_pool_alloc( owidth * ( oheight + 1 ) * 2 );
1033
1034 // Calculate strides
1035 int istride = iwidth * 2;
1036 int ostride = owidth * 2;
1037
1038 iwidth = iwidth - ( iwidth % 4 );
1039
1040 // Derived coordinates
1041 int dy, dx;
1042
1043 // Calculate ranges
1044 int out_x_range = owidth / 2;
1045 int out_y_range = oheight / 2;
1046 int in_x_range = iwidth / 2;
1047 int in_y_range = iheight / 2;
1048
1049 // Output pointers
1050 register uint8_t *out_line = output;
1051 register uint8_t *out_ptr;
1052
1053 // Calculate a middle pointer
1054 uint8_t *in_middle = input + istride * in_y_range + in_x_range * 2;
1055 uint8_t *in_line;
1056
1057 // Generate the affine transform scaling values
1058 register int scale_width = ( iwidth << 16 ) / owidth;
1059 register int scale_height = ( iheight << 16 ) / oheight;
1060 register int base = 0;
1061
1062 int outer = out_x_range * scale_width;
1063 int bottom = out_y_range * scale_height;
1064
1065 // Loop for the entirety of our output height.
1066 for ( dy = - bottom; dy < bottom; dy += scale_height )
1067 {
1068 // Start at the beginning of the line
1069 out_ptr = out_line;
1070
1071 // Pointer to the middle of the input line
1072 in_line = in_middle + ( dy >> 16 ) * istride;
1073
1074 // Loop for the entirety of our output row.
1075 for ( dx = - outer; dx < outer; dx += scale_width )
1076 {
1077 base = dx >> 15;
1078 base &= 0xfffffffe;
1079 *out_ptr ++ = *( in_line + base );
1080 base &= 0xfffffffc;
1081 *out_ptr ++ = *( in_line + base + 1 );
1082 dx += scale_width;
1083 base = dx >> 15;
1084 base &= 0xfffffffe;
1085 *out_ptr ++ = *( in_line + base );
1086 base &= 0xfffffffc;
1087 *out_ptr ++ = *( in_line + base + 3 );
1088 }
1089
1090 // Move to next output line
1091 out_line += ostride;
1092 }
1093
1094 // Now update the frame
1095 mlt_properties_set_data( properties, "image", output, owidth * ( oheight + 1 ) * 2, ( mlt_destructor )mlt_pool_release, NULL );
1096 mlt_properties_set_int( properties, "width", owidth );
1097 mlt_properties_set_int( properties, "height", oheight );
1098
1099 // Return the output
1100 return output;
1101 }
1102
1103 // No change, return input
1104 return input;
1105 }
1106
1107 int mlt_frame_mix_audio( mlt_frame this, mlt_frame that, float weight_start, float weight_end, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
1108 {
1109 int ret = 0;
1110 int16_t *src, *dest;
1111 int frequency_src = *frequency, frequency_dest = *frequency;
1112 int channels_src = *channels, channels_dest = *channels;
1113 int samples_src = *samples, samples_dest = *samples;
1114 int i, j;
1115 double d = 0, s = 0;
1116
1117 mlt_frame_get_audio( that, &src, format, &frequency_src, &channels_src, &samples_src );
1118 mlt_frame_get_audio( this, &dest, format, &frequency_dest, &channels_dest, &samples_dest );
1119
1120 int silent = mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "silent_audio" );
1121 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "silent_audio", 0 );
1122 if ( silent )
1123 memset( dest, 0, samples_dest * channels_dest * sizeof( int16_t ) );
1124
1125 silent = mlt_properties_get_int( MLT_FRAME_PROPERTIES( that ), "silent_audio" );
1126 mlt_properties_set_int( MLT_FRAME_PROPERTIES( that ), "silent_audio", 0 );
1127 if ( silent )
1128 memset( src, 0, samples_src * channels_src * sizeof( int16_t ) );
1129
1130 if ( channels_src > 6 )
1131 channels_src = 0;
1132 if ( channels_dest > 6 )
1133 channels_dest = 0;
1134 if ( samples_src > 4000 )
1135 samples_src = 0;
1136 if ( samples_dest > 4000 )
1137 samples_dest = 0;
1138
1139 // determine number of samples to process
1140 *samples = samples_src < samples_dest ? samples_src : samples_dest;
1141 *channels = channels_src < channels_dest ? channels_src : channels_dest;
1142 *buffer = dest;
1143 *frequency = frequency_dest;
1144
1145 // Compute a smooth ramp over start to end
1146 float weight = weight_start;
1147 float weight_step = ( weight_end - weight_start ) / *samples;
1148
1149 if ( src == dest )
1150 {
1151 *samples = samples_src;
1152 *channels = channels_src;
1153 *buffer = src;
1154 *frequency = frequency_src;
1155 return ret;
1156 }
1157
1158 // Mixdown
1159 for ( i = 0; i < *samples; i++ )
1160 {
1161 for ( j = 0; j < *channels; j++ )
1162 {
1163 if ( j < channels_dest )
1164 d = (double) dest[ i * channels_dest + j ];
1165 if ( j < channels_src )
1166 s = (double) src[ i * channels_src + j ];
1167 dest[ i * channels_dest + j ] = s * weight + d * ( 1.0 - weight );
1168 }
1169 weight += weight_step;
1170 }
1171
1172 return ret;
1173 }
1174
1175 // Replacement for broken mlt_frame_audio_mix - this filter uses an inline low pass filter
1176 // to allow mixing without volume hacking
1177 int mlt_frame_combine_audio( mlt_frame this, mlt_frame that, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
1178 {
1179 int ret = 0;
1180 int16_t *src, *dest;
1181 int frequency_src = *frequency, frequency_dest = *frequency;
1182 int channels_src = *channels, channels_dest = *channels;
1183 int samples_src = *samples, samples_dest = *samples;
1184 int i, j;
1185 double vp[ 6 ];
1186 double b_weight = 1.0;
1187
1188 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "meta.mixdown" ) )
1189 b_weight = 1.0 - mlt_properties_get_double( MLT_FRAME_PROPERTIES( this ), "meta.volume" );
1190
1191 mlt_frame_get_audio( that, &src, format, &frequency_src, &channels_src, &samples_src );
1192 mlt_frame_get_audio( this, &dest, format, &frequency_dest, &channels_dest, &samples_dest );
1193
1194 int silent = mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "silent_audio" );
1195 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "silent_audio", 0 );
1196 if ( silent )
1197 memset( dest, 0, samples_dest * channels_dest * sizeof( int16_t ) );
1198
1199 silent = mlt_properties_get_int( MLT_FRAME_PROPERTIES( that ), "silent_audio" );
1200 mlt_properties_set_int( MLT_FRAME_PROPERTIES( that ), "silent_audio", 0 );
1201 if ( silent )
1202 memset( src, 0, samples_src * channels_src * sizeof( int16_t ) );
1203
1204 if ( src == dest )
1205 {
1206 *samples = samples_src;
1207 *channels = channels_src;
1208 *buffer = src;
1209 *frequency = frequency_src;
1210 return ret;
1211 }
1212
1213 // determine number of samples to process
1214 *samples = samples_src < samples_dest ? samples_src : samples_dest;
1215 *channels = channels_src < channels_dest ? channels_src : channels_dest;
1216 *buffer = dest;
1217 *frequency = frequency_dest;
1218
1219 for ( j = 0; j < *channels; j++ )
1220 vp[ j ] = ( double )dest[ j ];
1221
1222 double Fc = 0.5;
1223 double B = exp(-2.0 * M_PI * Fc);
1224 double A = 1.0 - B;
1225 double v;
1226
1227 for ( i = 0; i < *samples; i++ )
1228 {
1229 for ( j = 0; j < *channels; j++ )
1230 {
1231 v = ( double )( b_weight * dest[ i * channels_dest + j ] + src[ i * channels_src + j ] );
1232 v = v < -32767 ? -32767 : v > 32768 ? 32768 : v;
1233 vp[ j ] = dest[ i * channels_dest + j ] = ( int16_t )( v * A + vp[ j ] * B );
1234 }
1235 }
1236
1237 return ret;
1238 }
1239
1240 /* Will this break when mlt_position is converted to double? -Zach */
1241 int mlt_sample_calculator( float fps, int frequency, int64_t position )
1242 {
1243 int samples = 0;
1244
1245 if ( ( int )( fps * 100 ) == 2997 )
1246 {
1247 samples = frequency / 30;
1248
1249 switch ( frequency )
1250 {
1251 case 48000:
1252 if ( position % 5 != 0 )
1253 samples += 2;
1254 break;
1255 case 44100:
1256 if ( position % 300 == 0 )
1257 samples = 1471;
1258 else if ( position % 30 == 0 )
1259 samples = 1470;
1260 else if ( position % 2 == 0 )
1261 samples = 1472;
1262 else
1263 samples = 1471;
1264 break;
1265 case 32000:
1266 if ( position % 30 == 0 )
1267 samples = 1068;
1268 else if ( position % 29 == 0 )
1269 samples = 1067;
1270 else if ( position % 4 == 2 )
1271 samples = 1067;
1272 else
1273 samples = 1068;
1274 break;
1275 default:
1276 samples = 0;
1277 }
1278 }
1279 else if ( fps != 0 )
1280 {
1281 samples = frequency / fps;
1282 }
1283
1284 return samples;
1285 }
1286
1287 int64_t mlt_sample_calculator_to_now( float fps, int frequency, int64_t frame )
1288 {
1289 int64_t samples = 0;
1290
1291 // TODO: Correct rules for NTSC and drop the * 100 hack
1292 if ( ( int )( fps * 100 ) == 2997 )
1293 {
1294 samples = ( ( double )( frame * frequency ) / 30 );
1295 switch( frequency )
1296 {
1297 case 48000:
1298 samples += 2 * ( frame / 5 );
1299 break;
1300 case 44100:
1301 samples += frame + ( frame / 2 ) - ( frame / 30 ) + ( frame / 300 );
1302 break;
1303 case 32000:
1304 samples += ( 2 * frame ) - ( frame / 4 ) - ( frame / 29 );
1305 break;
1306 }
1307 }
1308 else if ( fps != 0 )
1309 {
1310 samples = ( ( frame * frequency ) / ( int )fps );
1311 }
1312
1313 return samples;
1314 }
my melted branch