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"
24 #include "mlt_factory.h"
29 /** Constructor for a frame.
32 mlt_frame
mlt_frame_init( )
35 mlt_frame
this = calloc( sizeof( struct mlt_frame_s
), 1 );
39 // Get the normalisation
40 char *normalisation
= mlt_environment( "MLT_NORMALISATION" );
42 // Initialise the properties
43 mlt_properties properties
= &this->parent
;
44 mlt_properties_init( properties
, this );
46 // Set default properties on the frame
47 mlt_properties_set_position( properties
, "_position", 0.0 );
48 mlt_properties_set_data( properties
, "image", NULL
, 0, NULL
, NULL
);
50 if ( normalisation
== NULL
|| strcmp( normalisation
, "NTSC" ) )
52 mlt_properties_set_int( properties
, "width", 720 );
53 mlt_properties_set_int( properties
, "height", 576 );
54 mlt_properties_set_int( properties
, "normalised_width", 720 );
55 mlt_properties_set_int( properties
, "normalised_height", 576 );
56 mlt_properties_set_double( properties
, "aspect_ratio", 72.0/79.0 );
60 mlt_properties_set_int( properties
, "width", 720 );
61 mlt_properties_set_int( properties
, "height", 480 );
62 mlt_properties_set_int( properties
, "normalised_width", 720 );
63 mlt_properties_set_int( properties
, "normalised_height", 480 );
64 mlt_properties_set_double( properties
, "aspect_ratio", 128.0/117.0 );
67 mlt_properties_set_data( properties
, "audio", NULL
, 0, NULL
, NULL
);
68 mlt_properties_set_data( properties
, "alpha", NULL
, 0, NULL
, NULL
);
70 // Construct stacks for frames and methods
71 this->stack_image
= mlt_deque_init( );
72 this->stack_audio
= mlt_deque_init( );
78 /** Fetch the frames properties.
81 mlt_properties
mlt_frame_properties( mlt_frame
this )
83 return this != NULL ?
&this->parent
: NULL
;
86 /** Check if we have a way to derive something other than a test card.
89 int mlt_frame_is_test_card( mlt_frame
this )
91 return mlt_deque_count( this->stack_image
) == 0 || mlt_properties_get_int( mlt_frame_properties( this ), "test_image" );
94 /** Check if we have a way to derive something than test audio.
97 int mlt_frame_is_test_audio( mlt_frame
this )
99 return this->get_audio
== NULL
|| mlt_properties_get_int( mlt_frame_properties( this ), "test_audio" );
102 /** Get the aspect ratio of the frame.
105 double mlt_frame_get_aspect_ratio( mlt_frame
this )
107 return mlt_properties_get_double( mlt_frame_properties( this ), "aspect_ratio" );
110 /** Set the aspect ratio of the frame.
113 int mlt_frame_set_aspect_ratio( mlt_frame
this, double value
)
115 return mlt_properties_set_double( mlt_frame_properties( this ), "aspect_ratio", value
);
118 /** Get the position of this frame.
121 mlt_position
mlt_frame_get_position( mlt_frame
this )
123 return mlt_properties_get_position( mlt_frame_properties( this ), "_position" );
126 /** Set the position of this frame.
129 int mlt_frame_set_position( mlt_frame
this, mlt_position value
)
131 return mlt_properties_set_position( mlt_frame_properties( this ), "_position", value
);
134 /** Stack a get_image callback.
137 int mlt_frame_push_get_image( mlt_frame
this, mlt_get_image get_image
)
139 return mlt_deque_push_back( this->stack_image
, get_image
);
142 /** Pop a get_image callback.
145 mlt_get_image
mlt_frame_pop_get_image( mlt_frame
this )
147 return mlt_deque_pop_back( this->stack_image
);
153 int mlt_frame_push_frame( mlt_frame
this, mlt_frame that
)
155 return mlt_deque_push_back( this->stack_image
, that
);
161 mlt_frame
mlt_frame_pop_frame( mlt_frame
this )
163 return mlt_deque_pop_back( this->stack_image
);
169 int mlt_frame_push_service( mlt_frame
this, void *that
)
171 return mlt_deque_push_back( this->stack_image
, that
);
177 void *mlt_frame_pop_service( mlt_frame
this )
179 return mlt_deque_pop_back( this->stack_image
);
182 /** Push an audio item on the stack.
185 int mlt_frame_push_audio( mlt_frame
this, void *that
)
187 return mlt_deque_push_back( this->stack_audio
, that
);
190 /** Pop an audio item from the stack
193 void *mlt_frame_pop_audio( mlt_frame
this )
195 return mlt_deque_pop_back( this->stack_audio
);
198 int mlt_frame_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
200 mlt_properties properties
= mlt_frame_properties( this );
201 mlt_get_image get_image
= mlt_frame_pop_get_image( this );
202 mlt_producer producer
= mlt_properties_get_data( properties
, "test_card_producer", NULL
);
204 *width
= *width
>> 1 << 1;
206 if ( get_image
!= NULL
)
209 mlt_position position
= mlt_frame_get_position( this );
210 error
= get_image( this, buffer
, format
, width
, height
, writable
);
211 mlt_frame_set_position( this, position
);
214 else if ( mlt_properties_get_data( properties
, "image", NULL
) != NULL
)
216 *format
= mlt_image_yuv422
;
217 *buffer
= mlt_properties_get_data( properties
, "image", NULL
);
218 *width
= mlt_properties_get_int( properties
, "width" );
219 *height
= mlt_properties_get_int( properties
, "height" );
221 else if ( producer
!= NULL
)
223 mlt_frame test_frame
= NULL
;
224 mlt_service_get_frame( mlt_producer_service( producer
), &test_frame
, 0 );
225 if ( test_frame
!= NULL
)
227 mlt_properties test_properties
= mlt_frame_properties( test_frame
);
228 mlt_properties_set_double( test_properties
, "consumer_aspect_ratio", mlt_properties_get_double( properties
, "consumer_aspect_ratio" ) );
229 mlt_properties_set( test_properties
, "rescale.interp", mlt_properties_get( properties
, "rescale.interp" ) );
230 mlt_frame_get_image( test_frame
, buffer
, format
, width
, height
, writable
);
231 mlt_properties_set_data( properties
, "test_card_frame", test_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
232 mlt_properties_set_data( properties
, "image", *buffer
, *width
* *height
* 2, NULL
, NULL
);
233 mlt_properties_set_int( properties
, "width", *width
);
234 mlt_properties_set_int( properties
, "height", *height
);
235 mlt_properties_set_double( properties
, "aspect_ratio", mlt_frame_get_aspect_ratio( test_frame
) );
236 mlt_properties_set( properties
, "rescale.interp", "none" );
237 mlt_properties_set( properties
, "scale", "off" );
241 mlt_properties_set_data( properties
, "test_card_producer", NULL
, 0, NULL
, NULL
);
242 mlt_frame_get_image( this, buffer
, format
, width
, height
, writable
);
251 *width
= *width
== 0 ?
720 : *width
;
252 *height
= *height
== 0 ?
576 : *height
;
253 size
= *width
* *height
;
255 mlt_properties_set_int( properties
, "width", *width
);
256 mlt_properties_set_int( properties
, "height", *height
);
257 mlt_properties_set_int( properties
, "aspect_ratio", 1 );
265 case mlt_image_rgb24
:
268 *buffer
= mlt_pool_alloc( size
);
270 memset( *buffer
, 255, size
);
272 case mlt_image_rgb24a
:
275 *buffer
= mlt_pool_alloc( size
);
277 memset( *buffer
, 255, size
);
279 case mlt_image_yuv422
:
282 *buffer
= mlt_pool_alloc( size
);
285 while ( p
!= NULL
&& p
!= q
)
291 case mlt_image_yuv420p
:
293 *buffer
= mlt_pool_alloc( size
);
295 memset( *buffer
, 255, size
);
299 mlt_properties_set_data( properties
, "image", *buffer
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
300 mlt_properties_set_int( properties
, "test_image", 1 );
306 uint8_t *mlt_frame_get_alpha_mask( mlt_frame
this )
308 if ( this->get_alpha_mask
!= NULL
)
309 return this->get_alpha_mask( this );
313 int mlt_frame_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
315 mlt_properties properties
= mlt_frame_properties( this );
317 if ( this->get_audio
!= NULL
)
319 this->get_audio( this, buffer
, format
, frequency
, channels
, samples
);
321 else if ( mlt_properties_get_data( properties
, "audio", NULL
) )
323 *buffer
= mlt_properties_get_data( properties
, "audio", NULL
);
324 *frequency
= mlt_properties_get_int( properties
, "audio_frequency" );
325 *channels
= mlt_properties_get_int( properties
, "audio_channels" );
326 *samples
= mlt_properties_get_int( properties
, "audio_samples" );
331 *samples
= *samples
<= 0 ?
1920 : *samples
;
332 *channels
= *channels
<= 0 ?
2 : *channels
;
333 *frequency
= *frequency
<= 0 ?
48000 : *frequency
;
334 size
= *samples
* *channels
* sizeof( int16_t );
335 *buffer
= mlt_pool_alloc( size
);
336 if ( *buffer
!= NULL
)
337 memset( *buffer
, 0, size
);
338 mlt_properties_set_data( properties
, "audio", *buffer
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
339 mlt_properties_set_int( properties
, "test_audio", 1 );
342 mlt_properties_set_int( properties
, "audio_frequency", *frequency
);
343 mlt_properties_set_int( properties
, "audio_channels", *channels
);
344 mlt_properties_set_int( properties
, "audio_samples", *samples
);
349 unsigned char *mlt_frame_get_waveform( mlt_frame
this, int w
, int h
)
352 mlt_properties properties
= mlt_frame_properties( this );
353 mlt_audio_format format
= mlt_audio_pcm
;
354 int frequency
= 32000; // lower frequency available?
356 double fps
= mlt_properties_get_double( properties
, "fps" );
357 int samples
= mlt_sample_calculator( fps
, frequency
, mlt_frame_get_position( this ) );
360 mlt_frame_get_audio( this, &pcm
, &format
, &frequency
, &channels
, &samples
);
362 // Make an 8-bit buffer large enough to hold rendering
364 unsigned char *bitmap
= ( unsigned char* )mlt_pool_alloc( size
);
365 if ( bitmap
!= NULL
)
366 memset( bitmap
, 0, size
);
367 mlt_properties_set_data( properties
, "waveform", bitmap
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
369 // Render vertical lines
370 int16_t *ubound
= pcm
+ samples
* channels
;
371 int skip
= samples
/ w
- 1;
374 // Iterate sample stream and along x coordinate
375 for ( i
= 0; i
< w
&& pcm
< ubound
; i
++ )
377 // pcm data has channels interleaved
378 for ( j
= 0; j
< channels
; j
++ )
380 // Determine sample's magnitude from 2s complement;
381 int pcm_magnitude
= *pcm
< 0 ?
~(*pcm
) + 1 : *pcm
;
382 // The height of a line is the ratio of the magnitude multiplied by
383 // half the vertical resolution
384 int height
= ( int )( ( double )( pcm_magnitude
) / 32768 * h
/ 2 );
385 // Determine the starting y coordinate - left channel above center,
386 // right channel below - currently assumes 2 channels
387 int displacement
= ( h
/ 2 ) - ( 1 - j
) * height
;
388 // Position buffer pointer using y coordinate, stride, and x coordinate
389 unsigned char *p
= &bitmap
[ i
+ displacement
* w
];
391 // Draw vertical line
392 for ( k
= 0; k
< height
; k
++ )
397 pcm
+= skip
* channels
;
404 void mlt_frame_close( mlt_frame
this )
406 if ( this != NULL
&& mlt_properties_dec_ref( mlt_frame_properties( this ) ) <= 0 )
408 mlt_deque_close( this->stack_image
);
409 mlt_deque_close( this->stack_audio
);
410 mlt_properties_close( &this->parent
);
415 /***** convenience functions *****/
417 int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba
, int width
, int height
, int stride
, uint8_t *yuv
, uint8_t *alpha
)
420 register int y0
, y1
, u0
, u1
, v0
, v1
;
421 register int r
, g
, b
;
422 register uint8_t *d
= yuv
;
425 for ( i
= 0; i
< height
; i
++ )
427 register uint8_t *s
= rgba
+ ( stride
* i
);
428 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
434 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
439 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
451 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
459 int mlt_convert_rgb24_to_yuv422( uint8_t *rgb
, int width
, int height
, int stride
, uint8_t *yuv
)
462 register int y0
, y1
, u0
, u1
, v0
, v1
;
463 register int r
, g
, b
;
464 register uint8_t *d
= yuv
;
467 for ( i
= 0; i
< height
; i
++ )
469 register uint8_t *s
= rgb
+ ( stride
* i
);
470 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
475 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
479 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
490 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
498 int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p
, int width
, int height
, int stride
, uint8_t *yuv
)
503 int half
= width
>> 1;
505 uint8_t *Y
= yuv420p
;
506 uint8_t *U
= Y
+ width
* height
;
507 uint8_t *V
= U
+ width
* height
/ 4;
509 register uint8_t *d
= yuv
;
511 for ( i
= 0; i
< height
; i
++ )
513 register uint8_t *u
= U
+ ( i
/ 2 ) * ( half
);
514 register uint8_t *v
= V
+ ( i
/ 2 ) * ( half
);
516 for ( j
= 0; j
< half
; j
++ )
527 void mlt_resize_yuv422( uint8_t *output
, int owidth
, int oheight
, uint8_t *input
, int iwidth
, int iheight
)
530 int istride
= iwidth
* 2;
531 int ostride
= owidth
* 2;
533 iwidth
= iwidth
- ( iwidth
% 4 );
534 owidth
= owidth
- ( owidth
% 4 );
535 iheight
= iheight
- ( iheight
% 2 );
536 oheight
= oheight
- ( oheight
% 2 );
538 // Optimisation point
539 if ( iwidth
== owidth
&& iheight
== oheight
)
540 memcpy( output
, input
, iheight
* istride
);
542 // Coordinates (0,0 is middle of output)
546 int out_x_range
= owidth
/ 2;
547 int out_y_range
= oheight
/ 2;
548 int in_x_range
= iwidth
/ 2 < out_x_range ? iwidth
/ 2 : out_x_range
;
549 int in_y_range
= iheight
/ 2 < out_y_range ? iheight
/ 2 : out_y_range
;
552 uint8_t *out_line
= output
;
553 uint8_t *out_ptr
= out_line
;
555 // Calculate a middle and possibly invalid pointer in the input
556 uint8_t *in_middle
= input
+ istride
* ( iheight
/ 2 ) + ( iwidth
/ 2 ) * 2;
557 int in_line
= - in_y_range
* istride
- in_x_range
* 2;
561 // Fill whole section with black
562 y
= out_y_range
- ( iheight
/ 2 );
563 int blank_elements
= ostride
* y
/ 2;
564 elements
= blank_elements
;
565 while ( elements
-- )
571 int active_width
= 2 * iwidth
;
572 int inactive_width
= out_x_range
- in_x_range
;
576 // Loop for the entirety of our output height.
579 // Start at the beginning of the line
582 // Fill the outer part with black
583 elements
= inactive_width
;
584 while ( elements
-- )
590 // We're in the input range for this row.
591 p
= in_middle
+ in_line
;
592 end
= out_ptr
+ active_width
;
593 while ( out_ptr
!= end
)
599 // Fill the outer part with black
600 elements
= inactive_width
;
601 while ( elements
-- )
607 // Move to next input line
610 // Move to next output line
614 // Fill whole section with black
615 elements
= blank_elements
;
616 while ( elements
-- )
623 /** A resizing function for yuv422 frames - this does not rescale, but simply
624 resizes. It assumes yuv422 images available on the frame so use with care.
627 uint8_t *mlt_frame_resize_yuv422( mlt_frame
this, int owidth
, int oheight
)
630 mlt_properties properties
= mlt_frame_properties( this );
632 // Get the input image, width and height
633 uint8_t *input
= mlt_properties_get_data( properties
, "image", NULL
);
634 int iwidth
= mlt_properties_get_int( properties
, "width" );
635 int iheight
= mlt_properties_get_int( properties
, "height" );
637 // If width and height are correct, don't do anything
638 if ( iwidth
!= owidth
|| iheight
!= oheight
)
640 // Create the output image
641 uint8_t *output
= mlt_pool_alloc( owidth
* ( oheight
+ 1 ) * 2 );
643 // Call the generic resize
644 mlt_resize_yuv422( output
, owidth
, oheight
, input
, iwidth
, iheight
);
646 // Now update the frame
647 mlt_properties_set_data( properties
, "image", output
, owidth
* ( oheight
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
648 mlt_properties_set_int( properties
, "width", owidth
);
649 mlt_properties_set_int( properties
, "height", oheight
);
654 // No change, return input
658 /** A rescaling function for yuv422 frames - low quality, and provided for testing
659 only. It assumes yuv422 images available on the frame so use with care.
662 uint8_t *mlt_frame_rescale_yuv422( mlt_frame
this, int owidth
, int oheight
)
665 mlt_properties properties
= mlt_frame_properties( this );
667 // Get the input image, width and height
668 uint8_t *input
= mlt_properties_get_data( properties
, "image", NULL
);
669 int iwidth
= mlt_properties_get_int( properties
, "width" );
670 int iheight
= mlt_properties_get_int( properties
, "height" );
672 // If width and height are correct, don't do anything
673 if ( iwidth
!= owidth
|| iheight
!= oheight
)
675 // Create the output image
676 uint8_t *output
= mlt_pool_alloc( owidth
* ( oheight
+ 1 ) * 2 );
679 int istride
= iwidth
* 2;
680 int ostride
= owidth
* 2;
682 iwidth
= iwidth
- ( iwidth
% 4 );
684 // Derived coordinates
688 int out_x_range
= owidth
/ 2;
689 int out_y_range
= oheight
/ 2;
690 int in_x_range
= iwidth
/ 2;
691 int in_y_range
= iheight
/ 2;
694 register uint8_t *out_line
= output
;
695 register uint8_t *out_ptr
;
697 // Calculate a middle pointer
698 uint8_t *in_middle
= input
+ istride
* in_y_range
+ in_x_range
* 2;
701 // Generate the affine transform scaling values
702 register int scale_width
= ( iwidth
<< 16 ) / owidth
;
703 register int scale_height
= ( iheight
<< 16 ) / oheight
;
704 register int base
= 0;
706 int outer
= out_x_range
* scale_width
;
707 int bottom
= out_y_range
* scale_height
;
709 // Loop for the entirety of our output height.
710 for ( dy
= - bottom
; dy
< bottom
; dy
+= scale_height
)
712 // Start at the beginning of the line
715 // Pointer to the middle of the input line
716 in_line
= in_middle
+ ( dy
>> 16 ) * istride
;
718 // Loop for the entirety of our output row.
719 for ( dx
= - outer
; dx
< outer
; dx
+= scale_width
)
723 *out_ptr
++ = *( in_line
+ base
);
725 *out_ptr
++ = *( in_line
+ base
+ 1 );
729 *out_ptr
++ = *( in_line
+ base
);
731 *out_ptr
++ = *( in_line
+ base
+ 3 );
734 // Move to next output line
738 // Now update the frame
739 mlt_properties_set_data( properties
, "image", output
, owidth
* ( oheight
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
740 mlt_properties_set_int( properties
, "width", owidth
);
741 mlt_properties_set_int( properties
, "height", oheight
);
747 // No change, return input
751 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
)
755 int frequency_src
= *frequency
, frequency_dest
= *frequency
;
756 int channels_src
= *channels
, channels_dest
= *channels
;
757 int samples_src
= *samples
, samples_dest
= *samples
;
761 mlt_frame_get_audio( this, &dest
, format
, &frequency_dest
, &channels_dest
, &samples_dest
);
762 //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" ) );
763 mlt_frame_get_audio( that
, &src
, format
, &frequency_src
, &channels_src
, &samples_src
);
764 //fprintf( stderr, "mix: frame src samples %d channels %d\n", samples_src, channels_src );
766 if ( channels_src
> 6 )
768 if ( channels_dest
> 6 )
770 if ( samples_src
> 4000 )
772 if ( samples_dest
> 4000 )
775 // determine number of samples to process
776 *samples
= samples_src
< samples_dest ? samples_src
: samples_dest
;
777 *channels
= channels_src
< channels_dest ? channels_src
: channels_dest
;
779 *frequency
= frequency_dest
;
781 // Compute a smooth ramp over start to end
782 float weight
= weight_start
;
783 float weight_step
= ( weight_end
- weight_start
) / *samples
;
786 for ( i
= 0; i
< *samples
; i
++ )
788 for ( j
= 0; j
< *channels
; j
++ )
790 if ( j
< channels_dest
)
791 d
= (double) dest
[ i
* channels_dest
+ j
];
792 if ( j
< channels_src
)
793 s
= (double) src
[ i
* channels_src
+ j
];
794 dest
[ i
* channels_dest
+ j
] = s
* weight
+ d
* ( 1.0 - weight
);
796 weight
+= weight_step
;
802 int mlt_sample_calculator( float fps
, int frequency
, int64_t position
)
806 if ( ( int )( fps
* 100 ) == 2997 )
808 samples
= frequency
/ 30;
813 if ( position
% 5 != 0 )
817 if ( position
% 300 == 0 )
819 else if ( position
% 30 == 0 )
821 else if ( position
% 2 == 0 )
827 if ( position
% 30 == 0 )
829 else if ( position
% 29 == 0 )
831 else if ( position
% 4 == 2 )
842 samples
= frequency
/ fps
;