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
);
73 /** Fetch the frames properties.
76 mlt_properties
mlt_frame_properties( mlt_frame
this )
81 /** Check if we have a way to derive something other than a test card.
84 int mlt_frame_is_test_card( mlt_frame
this )
86 return mlt_properties_get_int( mlt_frame_properties( this ), "test_image" );
89 /** Check if we have a way to derive something than test audio.
92 int mlt_frame_is_test_audio( mlt_frame
this )
94 return this->get_audio
== NULL
|| mlt_properties_get_int( mlt_frame_properties( this ), "test_audio" );
97 /** Get the aspect ratio of the frame.
100 double mlt_frame_get_aspect_ratio( mlt_frame
this )
102 return mlt_properties_get_double( mlt_frame_properties( this ), "aspect_ratio" );
105 /** Set the aspect ratio of the frame.
108 int mlt_frame_set_aspect_ratio( mlt_frame
this, double value
)
110 return mlt_properties_set_double( mlt_frame_properties( this ), "aspect_ratio", value
);
113 /** Get the position of this frame.
116 mlt_position
mlt_frame_get_position( mlt_frame
this )
118 return mlt_properties_get_position( mlt_frame_properties( this ), "_position" );
121 /** Set the position of this frame.
124 int mlt_frame_set_position( mlt_frame
this, mlt_position value
)
126 return mlt_properties_set_position( mlt_frame_properties( this ), "_position", value
);
129 /** Stack a get_image callback.
132 int mlt_frame_push_get_image( mlt_frame
this, mlt_get_image get_image
)
134 int ret
= this->stack_get_image_size
>= 10;
136 this->stack_get_image
[ this->stack_get_image_size
++ ] = get_image
;
140 /** Pop a get_image callback.
143 mlt_get_image
mlt_frame_pop_get_image( mlt_frame
this )
145 mlt_get_image result
= NULL
;
146 if ( this->stack_get_image_size
> 0 )
147 result
= this->stack_get_image
[ -- this->stack_get_image_size
];
154 int mlt_frame_push_frame( mlt_frame
this, mlt_frame that
)
156 int ret
= this->stack_frame_size
>= 10;
158 this->stack_frame
[ this->stack_frame_size
++ ] = that
;
165 mlt_frame
mlt_frame_pop_frame( mlt_frame
this )
167 mlt_frame result
= NULL
;
168 if ( this->stack_frame_size
> 0 )
169 result
= this->stack_frame
[ -- this->stack_frame_size
];
173 int mlt_frame_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
175 mlt_properties properties
= mlt_frame_properties( this );
176 mlt_get_image get_image
= mlt_frame_pop_get_image( this );
177 mlt_producer producer
= mlt_properties_get_data( properties
, "test_card_producer", NULL
);
179 if ( get_image
!= NULL
)
181 return get_image( this, buffer
, format
, width
, height
, writable
);
183 else if ( mlt_properties_get_data( properties
, "image", NULL
) != NULL
)
185 *format
= mlt_image_yuv422
;
186 *buffer
= mlt_properties_get_data( properties
, "image", NULL
);
187 *width
= mlt_properties_get_int( properties
, "width" );
188 *height
= mlt_properties_get_int( properties
, "height" );
190 else if ( producer
!= NULL
)
192 mlt_frame test_frame
= NULL
;
193 mlt_service_get_frame( mlt_producer_service( producer
), &test_frame
, 0 );
194 if ( test_frame
!= NULL
)
196 mlt_properties test_properties
= mlt_frame_properties( test_frame
);
197 mlt_properties_set_double( test_properties
, "consumer_aspect_ratio", mlt_properties_get_double( properties
, "consumer_aspect_ratio" ) );
198 mlt_properties_set_double( test_properties
, "consumer_scale", mlt_properties_get_double( properties
, "consumer_scale" ) );
199 mlt_properties_set( test_properties
, "rescale.interp", "nearest" );
200 mlt_frame_get_image( test_frame
, buffer
, format
, width
, height
, writable
);
201 mlt_properties_inherit( properties
, test_properties
);
202 mlt_properties_set_data( properties
, "test_card_frame", test_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
203 mlt_properties_set_data( properties
, "image", *buffer
, *width
* *height
* 2, NULL
, NULL
);
204 mlt_properties_set_int( properties
, "width", *width
);
205 mlt_properties_set_int( properties
, "height", *height
);
209 mlt_properties_set_data( properties
, "test_card_producer", NULL
, 0, NULL
, NULL
);
210 mlt_frame_get_image( this, buffer
, format
, width
, height
, writable
);
219 *width
= *width
== 0 ?
720 : *width
;
220 *height
= *height
== 0 ?
576 : *height
;
221 size
= *width
* *height
;
223 mlt_properties_set_int( properties
, "width", *width
);
224 mlt_properties_set_int( properties
, "height", *height
);
232 case mlt_image_rgb24
:
235 *buffer
= mlt_pool_alloc( size
);
237 memset( *buffer
, 255, size
);
239 case mlt_image_rgb24a
:
242 *buffer
= mlt_pool_alloc( size
);
244 memset( *buffer
, 255, size
);
246 case mlt_image_yuv422
:
249 *buffer
= mlt_pool_alloc( size
);
252 while ( p
!= NULL
&& p
!= q
)
258 case mlt_image_yuv420p
:
260 *buffer
= mlt_pool_alloc( size
);
262 memset( *buffer
, 255, size
);
266 mlt_properties_set_data( properties
, "image", *buffer
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
267 mlt_properties_set_int( properties
, "test_image", 1 );
273 uint8_t *mlt_frame_get_alpha_mask( mlt_frame
this )
275 if ( this->get_alpha_mask
!= NULL
)
276 return this->get_alpha_mask( this );
280 int mlt_frame_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
282 mlt_properties properties
= mlt_frame_properties( this );
284 if ( this->get_audio
!= NULL
)
286 return this->get_audio( this, buffer
, format
, frequency
, channels
, samples
);
291 *samples
= *samples
<= 0 ?
1920 : *samples
;
292 *channels
= *channels
<= 0 ?
2 : *channels
;
293 *frequency
= *frequency
<= 0 ?
48000 : *frequency
;
294 size
= *samples
* *channels
* sizeof( int16_t );
295 *buffer
= mlt_pool_alloc( size
);
296 if ( *buffer
!= NULL
)
297 memset( *buffer
, 0, size
);
298 mlt_properties_set_data( properties
, "audio", *buffer
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
299 mlt_properties_set_int( properties
, "test_audio", 1 );
304 void mlt_frame_close( mlt_frame
this )
306 mlt_properties_close( &this->parent
);
310 /***** convenience functions *****/
311 #define RGB2YUV(r, g, b, y, u, v)\
312 y = (306*r + 601*g + 117*b) >> 10;\
313 u = ((-172*r - 340*g + 512*b) >> 10) + 128;\
314 v = ((512*r - 429*g - 83*b) >> 10) + 128;\
318 y = y > 255 ? 255 : y;\
319 u = u > 255 ? 255 : u;\
320 v = v > 255 ? 255 : v
322 int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba
, int width
, int height
, int stride
, uint8_t *yuv
, uint8_t *alpha
)
325 register int y0
, y1
, u0
, u1
, v0
, v1
;
326 register int r
, g
, b
;
327 register uint8_t *d
= yuv
;
330 for ( i
= 0; i
< height
; i
++ )
332 register uint8_t *s
= rgba
+ ( stride
* i
);
333 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
339 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
344 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
356 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
364 int mlt_convert_rgb24_to_yuv422( uint8_t *rgb
, int width
, int height
, int stride
, uint8_t *yuv
)
367 register int y0
, y1
, u0
, u1
, v0
, v1
;
368 register int r
, g
, b
;
369 register uint8_t *d
= yuv
;
372 for ( i
= 0; i
< height
; i
++ )
374 register uint8_t *s
= rgb
+ ( stride
* i
);
375 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
380 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
384 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
395 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
403 int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p
, int width
, int height
, int stride
, uint8_t *yuv
)
408 int half
= width
>> 1;
410 uint8_t *Y
= yuv420p
;
411 uint8_t *U
= Y
+ width
* height
;
412 uint8_t *V
= U
+ width
* height
/ 4;
414 register uint8_t *d
= yuv
;
416 for ( i
= 0; i
< height
; i
++ )
418 register uint8_t *u
= U
+ ( i
/ 2 ) * ( half
);
419 register uint8_t *v
= V
+ ( i
/ 2 ) * ( half
);
421 for ( j
= 0; j
< half
; j
++ )
432 void mlt_resize_yuv422( uint8_t *output
, int owidth
, int oheight
, uint8_t *input
, int iwidth
, int iheight
)
435 int istride
= iwidth
* 2;
436 int ostride
= owidth
* 2;
438 iwidth
= iwidth
- ( iwidth
% 4 );
439 owidth
= owidth
- ( owidth
% 4 );
440 iheight
= iheight
- ( iheight
% 2 );
441 oheight
= oheight
- ( oheight
% 2 );
443 // Optimisation point
444 if ( iwidth
== owidth
&& iheight
== oheight
)
445 memcpy( output
, input
, iheight
* istride
);
447 // Coordinates (0,0 is middle of output)
451 int out_x_range
= owidth
/ 2;
452 int out_y_range
= oheight
/ 2;
453 int in_x_range
= iwidth
/ 2 < out_x_range ? iwidth
/ 2 : out_x_range
;
454 int in_y_range
= iheight
/ 2 < out_y_range ? iheight
/ 2 : out_y_range
;
457 uint8_t *out_line
= output
;
458 uint8_t *out_ptr
= out_line
;
460 // Calculate a middle and possibly invalid pointer in the input
461 uint8_t *in_middle
= input
+ istride
* ( iheight
/ 2 ) + ( iwidth
/ 2 ) * 2;
462 int in_line
= - in_y_range
* istride
- in_x_range
* 2;
466 // Fill whole section with black
467 y
= out_y_range
- ( iheight
/ 2 );
468 int blank_elements
= ostride
* y
/ 2;
469 elements
= blank_elements
;
470 while ( elements
-- )
476 int active_width
= 2 * iwidth
;
477 int inactive_width
= out_x_range
- in_x_range
;
479 // Loop for the entirety of our output height.
482 // Start at the beginning of the line
485 // Fill the outer part with black
486 elements
= inactive_width
;
487 while ( elements
-- )
493 // We're in the input range for this row.
494 memcpy( out_ptr
, in_middle
+ in_line
, active_width
);
495 out_ptr
+= active_width
;
497 // Fill the outer part with black
498 elements
= inactive_width
;
499 while ( elements
-- )
505 // Move to next input line
508 // Move to next output line
512 // Fill whole section with black
513 elements
= blank_elements
;
514 while ( elements
-- )
521 /** A resizing function for yuv422 frames - this does not rescale, but simply
522 resizes. It assumes yuv422 images available on the frame so use with care.
525 uint8_t *mlt_frame_resize_yuv422( mlt_frame
this, int owidth
, int oheight
)
528 mlt_properties properties
= mlt_frame_properties( this );
530 // Get the input image, width and height
531 uint8_t *input
= mlt_properties_get_data( properties
, "image", NULL
);
532 int iwidth
= mlt_properties_get_int( properties
, "width" );
533 int iheight
= mlt_properties_get_int( properties
, "height" );
535 // If width and height are correct, don't do anything
536 if ( iwidth
!= owidth
|| iheight
!= oheight
)
538 // Create the output image
539 uint8_t *output
= mlt_pool_alloc( owidth
* ( oheight
+ 1 ) * 2 );
541 // Call the generic resize
542 mlt_resize_yuv422( output
, owidth
, oheight
, input
, iwidth
, iheight
);
544 // Now update the frame
545 mlt_properties_set_data( properties
, "image", output
, owidth
* ( oheight
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
546 mlt_properties_set_int( properties
, "width", owidth
);
547 mlt_properties_set_int( properties
, "height", oheight
);
552 // No change, return input
556 /** A rescaling function for yuv422 frames - low quality, and provided for testing
557 only. It assumes yuv422 images available on the frame so use with care.
560 uint8_t *mlt_frame_rescale_yuv422( mlt_frame
this, int owidth
, int oheight
)
563 mlt_properties properties
= mlt_frame_properties( this );
565 // Get the input image, width and height
566 uint8_t *input
= mlt_properties_get_data( properties
, "image", NULL
);
567 int iwidth
= mlt_properties_get_int( properties
, "width" );
568 int iheight
= mlt_properties_get_int( properties
, "height" );
570 // If width and height are correct, don't do anything
571 if ( iwidth
!= owidth
|| iheight
!= oheight
)
573 // Create the output image
574 uint8_t *output
= mlt_pool_alloc( owidth
* ( oheight
+ 1 ) * 2 );
577 int istride
= iwidth
* 2;
578 int ostride
= owidth
* 2;
580 iwidth
= iwidth
- ( iwidth
% 4 );
582 // Coordinates (0,0 is middle of output)
585 // Derived coordinates
589 int out_x_range
= owidth
/ 2;
590 int out_y_range
= oheight
/ 2;
591 int in_x_range
= iwidth
/ 2;
592 int in_y_range
= iheight
/ 2;
595 uint8_t *out_line
= output
;
598 // Calculate a middle pointer
599 uint8_t *in_middle
= input
+ istride
* in_y_range
+ in_x_range
* 2;
603 // Generate the affine transform scaling values
604 int scale_width
= ( iwidth
<< 16 ) / owidth
;
605 int scale_height
= ( iheight
<< 16 ) / oheight
;
607 // Loop for the entirety of our output height.
608 for ( y
= - out_y_range
; y
< out_y_range
; y
++ )
610 // Calculate the derived y value
611 dy
= ( scale_height
* y
) >> 16;
613 // Start at the beginning of the line
616 // Pointer to the middle of the input line
617 in_line
= in_middle
+ dy
* istride
;
619 // Loop for the entirety of our output row.
620 for ( x
= - out_x_range
; x
< out_x_range
; x
+= 1 )
622 // Calculated the derived x
623 dx
= ( scale_width
* x
) >> 16;
625 // We're in the input range for this row.
626 in_ptr
= in_line
+ ( dx
<< 1 );
627 *out_ptr
++ = *in_ptr
++;
628 in_ptr
= in_line
+ ( ( dx
>> 1 ) << 2 ) + ( ( x
& 1 ) << 1 ) + 1;
629 *out_ptr
++ = *in_ptr
;
632 // Move to next output line
636 // Now update the frame
637 mlt_properties_set_data( properties
, "image", output
, owidth
* ( oheight
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
638 mlt_properties_set_int( properties
, "width", owidth
);
639 mlt_properties_set_int( properties
, "height", oheight
);
645 // No change, return input
649 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
)
652 int16_t *p_src
, *p_dest
;
654 //static int16_t *extra_src = NULL, *extra_dest = NULL;
655 static int extra_src_samples
= 0, extra_dest_samples
= 0;
656 int frequency_src
= *frequency
, frequency_dest
= *frequency
;
657 int channels_src
= *channels
, channels_dest
= *channels
;
658 int samples_src
= *samples
, samples_dest
= *samples
;
662 mlt_frame_get_audio( this, &p_dest
, format
, &frequency_dest
, &channels_dest
, &samples_dest
);
663 //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" ) );
664 mlt_frame_get_audio( that
, &p_src
, format
, &frequency_src
, &channels_src
, &samples_src
);
665 //fprintf( stderr, "mix: frame src samples %d channels %d\n", samples_src, channels_src );
668 if ( channels_src
> 6 )
670 if ( channels_dest
> 6 )
672 if ( samples_src
> 4000 )
674 if ( samples_dest
> 4000 )
678 // Append new samples to leftovers
679 if ( extra_dest_samples
> 0 )
681 fprintf( stderr
, "prepending %d samples to dest\n", extra_dest_samples
);
682 dest
= realloc( extra_dest
, ( samples_dest
+ extra_dest_samples
) * 2 * channels_dest
);
683 memcpy( &extra_dest
[ extra_dest_samples
* channels_dest
], p_dest
, samples_dest
* 2 * channels_dest
);
687 if ( extra_src_samples
> 0 )
689 fprintf( stderr
, "prepending %d samples to src\n", extra_src_samples
);
690 src
= realloc( extra_src
, ( samples_src
+ extra_src_samples
) * 2 * channels_src
);
691 memcpy( &extra_src
[ extra_src_samples
* channels_src
], p_src
, samples_src
* 2 * channels_src
);
697 // determine number of samples to process
698 if ( samples_src
+ extra_src_samples
< samples_dest
+ extra_dest_samples
)
699 *samples
= samples_src
+ extra_src_samples
;
700 else if ( samples_dest
+ extra_dest_samples
< samples_src
+ extra_src_samples
)
701 *samples
= samples_dest
+ extra_dest_samples
;
703 *channels
= channels_src
< channels_dest ? channels_src
: channels_dest
;
705 *frequency
= frequency_dest
;
707 // Compute a smooth ramp over start to end
708 float weight
= weight_start
;
709 float weight_step
= ( weight_end
- weight_start
) / *samples
;
712 for ( i
= 0; i
< *samples
; i
++ )
714 for ( j
= 0; j
< *channels
; j
++ )
716 if ( j
< channels_dest
)
717 d
= (double) dest
[ i
* channels_dest
+ j
];
718 if ( j
< channels_src
)
719 s
= (double) src
[ i
* channels_src
+ j
];
720 dest
[ i
* channels_dest
+ j
] = s
* weight
+ d
* ( 1.0 - weight
);
722 weight
+= weight_step
;
725 // We have to copy --sigh
726 if ( dest
!= p_dest
)
727 memcpy( p_dest
, dest
, *samples
* 2 * *channels
);
730 // Store the leftovers
731 if ( samples_src
+ extra_src_samples
< samples_dest
+ extra_dest_samples
)
733 extra_dest_samples
= ( samples_dest
+ extra_dest_samples
) - ( samples_src
+ extra_src_samples
);
734 size_t size
= extra_dest_samples
* 2 * channels_dest
;
735 fprintf( stderr
, "storing %d samples from dest\n", extra_dest_samples
);
738 extra_dest
= malloc( size
);
740 memcpy( extra_dest
, &p_dest
[ ( samples_dest
- extra_dest_samples
- 1 ) * channels_dest
], size
);
742 extra_dest_samples
= 0;
744 else if ( samples_dest
+ extra_dest_samples
< samples_src
+ extra_src_samples
)
746 extra_src_samples
= ( samples_src
+ extra_src_samples
) - ( samples_dest
+ extra_dest_samples
);
747 size_t size
= extra_src_samples
* 2 * channels_src
;
748 fprintf( stderr
, "storing %d samples from src\n", extra_dest_samples
);
751 extra_src
= malloc( size
);
753 memcpy( extra_src
, &p_src
[ ( samples_src
- extra_src_samples
- 1 ) * channels_src
], size
);
755 extra_src_samples
= 0;
762 int mlt_sample_calculator( float fps
, int frequency
, int64_t position
)
766 if ( fps
> 29 && fps
<= 30 )
768 samples
= frequency
/ 30;
773 if ( position
% 5 != 0 )
777 if ( position
% 300 == 0 )
779 else if ( position
% 30 == 0 )
781 else if ( position
% 2 == 0 )
787 if ( position
% 30 == 0 )
789 else if ( position
% 29 == 0 )
791 else if ( position
% 4 == 2 )
802 samples
= frequency
/ fps
;