2 * mlt_frame.c -- interface for all frame classes
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
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.
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.
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.
22 #include "mlt_frame.h"
23 #include "mlt_producer.h"
28 /** Constructor for a frame.
31 mlt_frame
mlt_frame_init( )
34 mlt_frame
this = calloc( sizeof( struct mlt_frame_s
), 1 );
38 // Get the normalisation
39 char *normalisation
= getenv( "MLT_NORMALISATION" );
41 // Initialise the properties
42 mlt_properties properties
= &this->parent
;
43 mlt_properties_init( properties
, this );
45 // Set default properties on the frame
46 mlt_properties_set_position( properties
, "_position", 0.0 );
47 mlt_properties_set_data( properties
, "image", NULL
, 0, NULL
, NULL
);
49 if ( normalisation
== NULL
|| strcmp( normalisation
, "NTSC" ) )
51 mlt_properties_set_int( properties
, "width", 720 );
52 mlt_properties_set_int( properties
, "height", 576 );
53 mlt_properties_set_int( properties
, "normalised_width", 720 );
54 mlt_properties_set_int( properties
, "normalised_height", 576 );
58 mlt_properties_set_int( properties
, "width", 720 );
59 mlt_properties_set_int( properties
, "height", 480 );
60 mlt_properties_set_int( properties
, "normalised_width", 720 );
61 mlt_properties_set_int( properties
, "normalised_height", 480 );
64 mlt_properties_set_double( properties
, "aspect_ratio", 4.0 / 3.0 );
65 mlt_properties_set_data( properties
, "audio", NULL
, 0, NULL
, NULL
);
66 mlt_properties_set_data( properties
, "alpha", NULL
, 0, NULL
, NULL
);
68 // Construct stacks for frames and methods
69 this->stack_get_image
= mlt_deque_init( );
70 this->stack_frame
= mlt_deque_init( );
76 /** Fetch the frames properties.
79 mlt_properties
mlt_frame_properties( mlt_frame
this )
84 /** Check if we have a way to derive something other than a test card.
87 int mlt_frame_is_test_card( mlt_frame
this )
89 return mlt_properties_get_int( mlt_frame_properties( this ), "test_image" );
92 /** Check if we have a way to derive something than test audio.
95 int mlt_frame_is_test_audio( mlt_frame
this )
97 return this->get_audio
== NULL
|| mlt_properties_get_int( mlt_frame_properties( this ), "test_audio" );
100 /** Get the aspect ratio of the frame.
103 double mlt_frame_get_aspect_ratio( mlt_frame
this )
105 return mlt_properties_get_double( mlt_frame_properties( this ), "aspect_ratio" );
108 /** Set the aspect ratio of the frame.
111 int mlt_frame_set_aspect_ratio( mlt_frame
this, double value
)
113 return mlt_properties_set_double( mlt_frame_properties( this ), "aspect_ratio", value
);
116 /** Get the position of this frame.
119 mlt_position
mlt_frame_get_position( mlt_frame
this )
121 return mlt_properties_get_position( mlt_frame_properties( this ), "_position" );
124 /** Set the position of this frame.
127 int mlt_frame_set_position( mlt_frame
this, mlt_position value
)
129 return mlt_properties_set_position( mlt_frame_properties( this ), "_position", value
);
132 /** Stack a get_image callback.
135 int mlt_frame_push_get_image( mlt_frame
this, mlt_get_image get_image
)
137 return mlt_deque_push_back( this->stack_get_image
, get_image
);
140 /** Pop a get_image callback.
143 mlt_get_image
mlt_frame_pop_get_image( mlt_frame
this )
145 return mlt_deque_pop_back( this->stack_get_image
);
151 int mlt_frame_push_frame( mlt_frame
this, mlt_frame that
)
153 return mlt_deque_push_back( this->stack_frame
, that
);
159 mlt_frame
mlt_frame_pop_frame( mlt_frame
this )
161 return mlt_deque_pop_back( this->stack_frame
);
164 int mlt_frame_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
166 mlt_properties properties
= mlt_frame_properties( this );
167 mlt_get_image get_image
= mlt_frame_pop_get_image( this );
168 mlt_producer producer
= mlt_properties_get_data( properties
, "test_card_producer", NULL
);
170 if ( get_image
!= NULL
)
172 return get_image( this, buffer
, format
, width
, height
, writable
);
174 else if ( mlt_properties_get_data( properties
, "image", NULL
) != NULL
)
176 *format
= mlt_image_yuv422
;
177 *buffer
= mlt_properties_get_data( properties
, "image", NULL
);
178 *width
= mlt_properties_get_int( properties
, "width" );
179 *height
= mlt_properties_get_int( properties
, "height" );
181 else if ( producer
!= NULL
)
183 mlt_frame test_frame
= NULL
;
184 mlt_service_get_frame( mlt_producer_service( producer
), &test_frame
, 0 );
185 if ( test_frame
!= NULL
)
187 mlt_properties test_properties
= mlt_frame_properties( test_frame
);
188 mlt_properties_set_double( test_properties
, "consumer_aspect_ratio", mlt_properties_get_double( properties
, "consumer_aspect_ratio" ) );
189 mlt_properties_set_double( test_properties
, "consumer_scale", mlt_properties_get_double( properties
, "consumer_scale" ) );
190 mlt_properties_set( test_properties
, "rescale.interp", "nearest" );
191 mlt_frame_get_image( test_frame
, buffer
, format
, width
, height
, writable
);
192 mlt_properties_set_data( properties
, "test_card_frame", test_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
193 mlt_properties_set_data( properties
, "image", *buffer
, *width
* *height
* 2, NULL
, NULL
);
194 mlt_properties_set_int( properties
, "width", *width
);
195 mlt_properties_set_int( properties
, "height", *height
);
199 mlt_properties_set_data( properties
, "test_card_producer", NULL
, 0, NULL
, NULL
);
200 mlt_frame_get_image( this, buffer
, format
, width
, height
, writable
);
209 *width
= *width
== 0 ?
720 : *width
;
210 *height
= *height
== 0 ?
576 : *height
;
211 size
= *width
* *height
;
213 mlt_properties_set_int( properties
, "width", *width
);
214 mlt_properties_set_int( properties
, "height", *height
);
222 case mlt_image_rgb24
:
225 *buffer
= mlt_pool_alloc( size
);
227 memset( *buffer
, 255, size
);
229 case mlt_image_rgb24a
:
232 *buffer
= mlt_pool_alloc( size
);
234 memset( *buffer
, 255, size
);
236 case mlt_image_yuv422
:
239 *buffer
= mlt_pool_alloc( size
);
242 while ( p
!= NULL
&& p
!= q
)
248 case mlt_image_yuv420p
:
250 *buffer
= mlt_pool_alloc( size
);
252 memset( *buffer
, 255, size
);
256 mlt_properties_set_data( properties
, "image", *buffer
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
257 mlt_properties_set_int( properties
, "test_image", 1 );
263 uint8_t *mlt_frame_get_alpha_mask( mlt_frame
this )
265 if ( this->get_alpha_mask
!= NULL
)
266 return this->get_alpha_mask( this );
270 int mlt_frame_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
272 mlt_properties properties
= mlt_frame_properties( this );
274 if ( this->get_audio
!= NULL
)
276 return this->get_audio( this, buffer
, format
, frequency
, channels
, samples
);
281 *samples
= *samples
<= 0 ?
1920 : *samples
;
282 *channels
= *channels
<= 0 ?
2 : *channels
;
283 *frequency
= *frequency
<= 0 ?
48000 : *frequency
;
284 size
= *samples
* *channels
* sizeof( int16_t );
285 *buffer
= mlt_pool_alloc( size
);
286 if ( *buffer
!= NULL
)
287 memset( *buffer
, 0, size
);
288 mlt_properties_set_data( properties
, "audio", *buffer
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
289 mlt_properties_set_int( properties
, "test_audio", 1 );
294 void mlt_frame_close( mlt_frame
this )
298 mlt_deque_close( this->stack_get_image
);
299 mlt_deque_close( this->stack_frame
);
300 mlt_properties_close( &this->parent
);
305 /***** convenience functions *****/
306 #define RGB2YUV(r, g, b, y, u, v)\
307 y = (306*r + 601*g + 117*b) >> 10;\
308 u = ((-172*r - 340*g + 512*b) >> 10) + 128;\
309 v = ((512*r - 429*g - 83*b) >> 10) + 128;\
313 y = y > 255 ? 255 : y;\
314 u = u > 255 ? 255 : u;\
315 v = v > 255 ? 255 : v
317 int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba
, int width
, int height
, int stride
, uint8_t *yuv
, uint8_t *alpha
)
320 register int y0
, y1
, u0
, u1
, v0
, v1
;
321 register int r
, g
, b
;
322 register uint8_t *d
= yuv
;
325 for ( i
= 0; i
< height
; i
++ )
327 register uint8_t *s
= rgba
+ ( stride
* i
);
328 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
334 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
339 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
351 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
359 int mlt_convert_rgb24_to_yuv422( uint8_t *rgb
, int width
, int height
, int stride
, uint8_t *yuv
)
362 register int y0
, y1
, u0
, u1
, v0
, v1
;
363 register int r
, g
, b
;
364 register uint8_t *d
= yuv
;
367 for ( i
= 0; i
< height
; i
++ )
369 register uint8_t *s
= rgb
+ ( stride
* i
);
370 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
375 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
379 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
390 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
398 int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p
, int width
, int height
, int stride
, uint8_t *yuv
)
403 int half
= width
>> 1;
405 uint8_t *Y
= yuv420p
;
406 uint8_t *U
= Y
+ width
* height
;
407 uint8_t *V
= U
+ width
* height
/ 4;
409 register uint8_t *d
= yuv
;
411 for ( i
= 0; i
< height
; i
++ )
413 register uint8_t *u
= U
+ ( i
/ 2 ) * ( half
);
414 register uint8_t *v
= V
+ ( i
/ 2 ) * ( half
);
416 for ( j
= 0; j
< half
; j
++ )
427 void mlt_resize_yuv422( uint8_t *output
, int owidth
, int oheight
, uint8_t *input
, int iwidth
, int iheight
)
430 int istride
= iwidth
* 2;
431 int ostride
= owidth
* 2;
433 iwidth
= iwidth
- ( iwidth
% 4 );
434 owidth
= owidth
- ( owidth
% 4 );
435 iheight
= iheight
- ( iheight
% 2 );
436 oheight
= oheight
- ( oheight
% 2 );
438 // Optimisation point
439 if ( iwidth
== owidth
&& iheight
== oheight
)
440 memcpy( output
, input
, iheight
* istride
);
442 // Coordinates (0,0 is middle of output)
446 int out_x_range
= owidth
/ 2;
447 int out_y_range
= oheight
/ 2;
448 int in_x_range
= iwidth
/ 2 < out_x_range ? iwidth
/ 2 : out_x_range
;
449 int in_y_range
= iheight
/ 2 < out_y_range ? iheight
/ 2 : out_y_range
;
452 uint8_t *out_line
= output
;
453 uint8_t *out_ptr
= out_line
;
455 // Calculate a middle and possibly invalid pointer in the input
456 uint8_t *in_middle
= input
+ istride
* ( iheight
/ 2 ) + ( iwidth
/ 2 ) * 2;
457 int in_line
= - in_y_range
* istride
- in_x_range
* 2;
461 // Fill whole section with black
462 y
= out_y_range
- ( iheight
/ 2 );
463 int blank_elements
= ostride
* y
/ 2;
464 elements
= blank_elements
;
465 while ( elements
-- )
471 int active_width
= 2 * iwidth
;
472 int inactive_width
= out_x_range
- in_x_range
;
474 // Loop for the entirety of our output height.
477 // Start at the beginning of the line
480 // Fill the outer part with black
481 elements
= inactive_width
;
482 while ( elements
-- )
488 // We're in the input range for this row.
489 memcpy( out_ptr
, in_middle
+ in_line
, active_width
);
490 out_ptr
+= active_width
;
492 // Fill the outer part with black
493 elements
= inactive_width
;
494 while ( elements
-- )
500 // Move to next input line
503 // Move to next output line
507 // Fill whole section with black
508 elements
= blank_elements
;
509 while ( elements
-- )
516 /** A resizing function for yuv422 frames - this does not rescale, but simply
517 resizes. It assumes yuv422 images available on the frame so use with care.
520 uint8_t *mlt_frame_resize_yuv422( mlt_frame
this, int owidth
, int oheight
)
523 mlt_properties properties
= mlt_frame_properties( this );
525 // Get the input image, width and height
526 uint8_t *input
= mlt_properties_get_data( properties
, "image", NULL
);
527 int iwidth
= mlt_properties_get_int( properties
, "width" );
528 int iheight
= mlt_properties_get_int( properties
, "height" );
530 // If width and height are correct, don't do anything
531 if ( iwidth
!= owidth
|| iheight
!= oheight
)
533 // Create the output image
534 uint8_t *output
= mlt_pool_alloc( owidth
* ( oheight
+ 1 ) * 2 );
536 // Call the generic resize
537 mlt_resize_yuv422( output
, owidth
, oheight
, input
, iwidth
, iheight
);
539 // Now update the frame
540 mlt_properties_set_data( properties
, "image", output
, owidth
* ( oheight
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
541 mlt_properties_set_int( properties
, "width", owidth
);
542 mlt_properties_set_int( properties
, "height", oheight
);
547 // No change, return input
551 /** A rescaling function for yuv422 frames - low quality, and provided for testing
552 only. It assumes yuv422 images available on the frame so use with care.
555 uint8_t *mlt_frame_rescale_yuv422( mlt_frame
this, int owidth
, int oheight
)
558 mlt_properties properties
= mlt_frame_properties( this );
560 // Get the input image, width and height
561 uint8_t *input
= mlt_properties_get_data( properties
, "image", NULL
);
562 int iwidth
= mlt_properties_get_int( properties
, "width" );
563 int iheight
= mlt_properties_get_int( properties
, "height" );
565 // If width and height are correct, don't do anything
566 if ( iwidth
!= owidth
|| iheight
!= oheight
)
568 // Create the output image
569 uint8_t *output
= mlt_pool_alloc( owidth
* ( oheight
+ 1 ) * 2 );
572 int istride
= iwidth
* 2;
573 int ostride
= owidth
* 2;
575 iwidth
= iwidth
- ( iwidth
% 4 );
577 // Coordinates (0,0 is middle of output)
580 // Derived coordinates
584 int out_x_range
= owidth
/ 2;
585 int out_y_range
= oheight
/ 2;
586 int in_x_range
= iwidth
/ 2;
587 int in_y_range
= iheight
/ 2;
590 uint8_t *out_line
= output
;
593 // Calculate a middle pointer
594 uint8_t *in_middle
= input
+ istride
* in_y_range
+ in_x_range
* 2;
598 // Generate the affine transform scaling values
599 int scale_width
= ( iwidth
<< 16 ) / owidth
;
600 int scale_height
= ( iheight
<< 16 ) / oheight
;
602 // Loop for the entirety of our output height.
603 for ( y
= - out_y_range
; y
< out_y_range
; y
++ )
605 // Calculate the derived y value
606 dy
= ( scale_height
* y
) >> 16;
608 // Start at the beginning of the line
611 // Pointer to the middle of the input line
612 in_line
= in_middle
+ dy
* istride
;
614 // Loop for the entirety of our output row.
615 for ( x
= - out_x_range
; x
< out_x_range
; x
+= 1 )
617 // Calculated the derived x
618 dx
= ( scale_width
* x
) >> 16;
620 // We're in the input range for this row.
621 in_ptr
= in_line
+ ( dx
<< 1 );
622 *out_ptr
++ = *in_ptr
++;
623 in_ptr
= in_line
+ ( ( dx
>> 1 ) << 2 ) + ( ( x
& 1 ) << 1 ) + 1;
624 *out_ptr
++ = *in_ptr
;
627 // Move to next output line
631 // Now update the frame
632 mlt_properties_set_data( properties
, "image", output
, owidth
* ( oheight
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
633 mlt_properties_set_int( properties
, "width", owidth
);
634 mlt_properties_set_int( properties
, "height", oheight
);
640 // No change, return input
644 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
)
647 int16_t *p_src
, *p_dest
;
649 //static int16_t *extra_src = NULL, *extra_dest = NULL;
650 static int extra_src_samples
= 0, extra_dest_samples
= 0;
651 int frequency_src
= *frequency
, frequency_dest
= *frequency
;
652 int channels_src
= *channels
, channels_dest
= *channels
;
653 int samples_src
= *samples
, samples_dest
= *samples
;
657 mlt_frame_get_audio( this, &p_dest
, format
, &frequency_dest
, &channels_dest
, &samples_dest
);
658 //fprintf( stderr, "mix: frame dest samples %d channels %d position %lld\n", samples_dest, channels_dest, mlt_properties_get_position( mlt_frame_properties( this ), "_position" ) );
659 mlt_frame_get_audio( that
, &p_src
, format
, &frequency_src
, &channels_src
, &samples_src
);
660 //fprintf( stderr, "mix: frame src samples %d channels %d\n", samples_src, channels_src );
663 if ( channels_src
> 6 )
665 if ( channels_dest
> 6 )
667 if ( samples_src
> 4000 )
669 if ( samples_dest
> 4000 )
673 // Append new samples to leftovers
674 if ( extra_dest_samples
> 0 )
676 fprintf( stderr
, "prepending %d samples to dest\n", extra_dest_samples
);
677 dest
= realloc( extra_dest
, ( samples_dest
+ extra_dest_samples
) * 2 * channels_dest
);
678 memcpy( &extra_dest
[ extra_dest_samples
* channels_dest
], p_dest
, samples_dest
* 2 * channels_dest
);
682 if ( extra_src_samples
> 0 )
684 fprintf( stderr
, "prepending %d samples to src\n", extra_src_samples
);
685 src
= realloc( extra_src
, ( samples_src
+ extra_src_samples
) * 2 * channels_src
);
686 memcpy( &extra_src
[ extra_src_samples
* channels_src
], p_src
, samples_src
* 2 * channels_src
);
692 // determine number of samples to process
693 if ( samples_src
+ extra_src_samples
< samples_dest
+ extra_dest_samples
)
694 *samples
= samples_src
+ extra_src_samples
;
695 else if ( samples_dest
+ extra_dest_samples
< samples_src
+ extra_src_samples
)
696 *samples
= samples_dest
+ extra_dest_samples
;
698 *channels
= channels_src
< channels_dest ? channels_src
: channels_dest
;
700 *frequency
= frequency_dest
;
702 // Compute a smooth ramp over start to end
703 float weight
= weight_start
;
704 float weight_step
= ( weight_end
- weight_start
) / *samples
;
707 for ( i
= 0; i
< *samples
; i
++ )
709 for ( j
= 0; j
< *channels
; j
++ )
711 if ( j
< channels_dest
)
712 d
= (double) dest
[ i
* channels_dest
+ j
];
713 if ( j
< channels_src
)
714 s
= (double) src
[ i
* channels_src
+ j
];
715 dest
[ i
* channels_dest
+ j
] = s
* weight
+ d
* ( 1.0 - weight
);
717 weight
+= weight_step
;
720 // We have to copy --sigh
721 if ( dest
!= p_dest
)
722 memcpy( p_dest
, dest
, *samples
* 2 * *channels
);
725 // Store the leftovers
726 if ( samples_src
+ extra_src_samples
< samples_dest
+ extra_dest_samples
)
728 extra_dest_samples
= ( samples_dest
+ extra_dest_samples
) - ( samples_src
+ extra_src_samples
);
729 size_t size
= extra_dest_samples
* 2 * channels_dest
;
730 fprintf( stderr
, "storing %d samples from dest\n", extra_dest_samples
);
733 extra_dest
= malloc( size
);
735 memcpy( extra_dest
, &p_dest
[ ( samples_dest
- extra_dest_samples
- 1 ) * channels_dest
], size
);
737 extra_dest_samples
= 0;
739 else if ( samples_dest
+ extra_dest_samples
< samples_src
+ extra_src_samples
)
741 extra_src_samples
= ( samples_src
+ extra_src_samples
) - ( samples_dest
+ extra_dest_samples
);
742 size_t size
= extra_src_samples
* 2 * channels_src
;
743 fprintf( stderr
, "storing %d samples from src\n", extra_dest_samples
);
746 extra_src
= malloc( size
);
748 memcpy( extra_src
, &p_src
[ ( samples_src
- extra_src_samples
- 1 ) * channels_src
], size
);
750 extra_src_samples
= 0;
757 int mlt_sample_calculator( float fps
, int frequency
, int64_t position
)
761 if ( fps
> 29 && fps
<= 30 )
763 samples
= frequency
/ 30;
768 if ( position
% 5 != 0 )
772 if ( position
% 300 == 0 )
774 else if ( position
% 30 == 0 )
776 else if ( position
% 2 == 0 )
782 if ( position
% 30 == 0 )
784 else if ( position
% 29 == 0 )
786 else if ( position
% 4 == 2 )
797 samples
= frequency
/ fps
;