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 library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, 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"
30 /** Constructor for a frame.
33 mlt_frame
mlt_frame_init( )
36 mlt_frame
this = calloc( sizeof( struct mlt_frame_s
), 1 );
40 // Get the normalisation
41 char *normalisation
= mlt_environment( "MLT_NORMALISATION" );
43 // Initialise the properties
44 mlt_properties properties
= &this->parent
;
45 mlt_properties_init( properties
, this );
47 // Set default properties on the frame
48 mlt_properties_set_position( properties
, "_position", 0.0 );
49 mlt_properties_set_data( properties
, "image", NULL
, 0, NULL
, NULL
);
51 if ( normalisation
== NULL
|| strcmp( normalisation
, "NTSC" ) )
53 mlt_properties_set_int( properties
, "width", 720 );
54 mlt_properties_set_int( properties
, "height", 576 );
55 mlt_properties_set_int( properties
, "normalised_width", 720 );
56 mlt_properties_set_int( properties
, "normalised_height", 576 );
57 mlt_properties_set_double( properties
, "aspect_ratio", 59.0/54.0 );
61 mlt_properties_set_int( properties
, "width", 720 );
62 mlt_properties_set_int( properties
, "height", 480 );
63 mlt_properties_set_int( properties
, "normalised_width", 720 );
64 mlt_properties_set_int( properties
, "normalised_height", 480 );
65 mlt_properties_set_double( properties
, "aspect_ratio", 10.0/11.0 );
68 mlt_properties_set_data( properties
, "audio", NULL
, 0, NULL
, NULL
);
69 mlt_properties_set_data( properties
, "alpha", NULL
, 0, NULL
, NULL
);
71 // Construct stacks for frames and methods
72 this->stack_image
= mlt_deque_init( );
73 this->stack_audio
= mlt_deque_init( );
74 this->stack_service
= mlt_deque_init( );
80 /** Fetch the frames properties.
83 mlt_properties
mlt_frame_properties( mlt_frame
this )
85 return this != NULL ?
&this->parent
: NULL
;
88 /** Check if we have a way to derive something other than a test card.
91 int mlt_frame_is_test_card( mlt_frame
this )
93 return mlt_deque_count( this->stack_image
) == 0 || mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "test_image" );
96 /** Check if we have a way to derive something other than test audio.
99 int mlt_frame_is_test_audio( mlt_frame
this )
101 return mlt_deque_count( this->stack_audio
) == 0 || mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "test_audio" );
104 /** Get the aspect ratio of the frame.
107 double mlt_frame_get_aspect_ratio( mlt_frame
this )
109 return mlt_properties_get_double( MLT_FRAME_PROPERTIES( this ), "aspect_ratio" );
112 /** Set the aspect ratio of the frame.
115 int mlt_frame_set_aspect_ratio( mlt_frame
this, double value
)
117 return mlt_properties_set_double( MLT_FRAME_PROPERTIES( this ), "aspect_ratio", value
);
120 /** Get the position of this frame.
123 mlt_position
mlt_frame_get_position( mlt_frame
this )
125 int pos
= mlt_properties_get_position( MLT_FRAME_PROPERTIES( this ), "_position" );
126 return pos
< 0 ?
0 : pos
;
129 /** Set the position of this frame.
132 int mlt_frame_set_position( mlt_frame
this, mlt_position value
)
134 return mlt_properties_set_position( MLT_FRAME_PROPERTIES( this ), "_position", value
);
137 /** Stack a get_image callback.
140 int mlt_frame_push_get_image( mlt_frame
this, mlt_get_image get_image
)
142 return mlt_deque_push_back( this->stack_image
, get_image
);
145 /** Pop a get_image callback.
148 mlt_get_image
mlt_frame_pop_get_image( mlt_frame
this )
150 return mlt_deque_pop_back( this->stack_image
);
156 int mlt_frame_push_frame( mlt_frame
this, mlt_frame that
)
158 return mlt_deque_push_back( this->stack_image
, that
);
164 mlt_frame
mlt_frame_pop_frame( mlt_frame
this )
166 return mlt_deque_pop_back( this->stack_image
);
172 int mlt_frame_push_service( mlt_frame
this, void *that
)
174 return mlt_deque_push_back( this->stack_image
, that
);
180 void *mlt_frame_pop_service( mlt_frame
this )
182 return mlt_deque_pop_back( this->stack_image
);
188 int mlt_frame_push_service_int( mlt_frame
this, int that
)
190 return mlt_deque_push_back_int( this->stack_image
, that
);
196 int mlt_frame_pop_service_int( mlt_frame
this )
198 return mlt_deque_pop_back_int( this->stack_image
);
201 /** Push an audio item on the stack.
204 int mlt_frame_push_audio( mlt_frame
this, void *that
)
206 return mlt_deque_push_back( this->stack_audio
, that
);
209 /** Pop an audio item from the stack
212 void *mlt_frame_pop_audio( mlt_frame
this )
214 return mlt_deque_pop_back( this->stack_audio
);
217 /** Return the service stack
220 mlt_deque
mlt_frame_service_stack( mlt_frame
this )
222 return this->stack_service
;
225 /** Replace image stack with the information provided.
227 This might prove to be unreliable and restrictive - the idea is that a transition
228 which normally uses two images may decide to only use the b frame (ie: in the case
229 of a composite where the b frame completely obscures the a frame).
231 The image must be writable and the destructor for the image itself must be taken
232 care of on another frame and that frame cannot have a replace applied to it...
233 Further it assumes that no alpha mask is in use.
235 For these reasons, it can only be used in a specific situation - when you have
236 multiple tracks each with their own transition and these transitions are applied
237 in a strictly reversed order (ie: highest numbered [lowest track] is processed
240 More reliable approach - the cases should be detected during the process phase
241 and the upper tracks should simply not be invited to stack...
244 void mlt_frame_replace_image( mlt_frame
this, uint8_t *image
, mlt_image_format format
, int width
, int height
)
246 // Remove all items from the stack
247 while( mlt_deque_pop_back( this->stack_image
) ) ;
249 // Update the information
250 mlt_properties_set_data( MLT_FRAME_PROPERTIES( this ), "image", image
, 0, NULL
, NULL
);
251 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "width", width
);
252 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "height", height
);
253 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "format", format
);
254 this->get_alpha_mask
= NULL
;
257 /** Get the image associated to the frame.
260 int mlt_frame_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
262 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
263 mlt_get_image get_image
= mlt_frame_pop_get_image( this );
264 mlt_producer producer
= mlt_properties_get_data( properties
, "test_card_producer", NULL
);
267 if ( get_image
!= NULL
)
269 mlt_properties_set_int( properties
, "image_count", mlt_properties_get_int( properties
, "image_count" ) - 1 );
270 mlt_position position
= mlt_frame_get_position( this );
271 error
= get_image( this, buffer
, format
, width
, height
, writable
);
272 mlt_properties_set_int( properties
, "width", *width
);
273 mlt_properties_set_int( properties
, "height", *height
);
274 mlt_properties_set_int( properties
, "format", *format
);
275 mlt_frame_set_position( this, position
);
277 else if ( mlt_properties_get_data( properties
, "image", NULL
) != NULL
)
279 *format
= mlt_properties_get_int( properties
, "format" );
280 *buffer
= mlt_properties_get_data( properties
, "image", NULL
);
281 *width
= mlt_properties_get_int( properties
, "width" );
282 *height
= mlt_properties_get_int( properties
, "height" );
284 else if ( producer
!= NULL
)
286 mlt_frame test_frame
= NULL
;
287 mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer
), &test_frame
, 0 );
288 if ( test_frame
!= NULL
)
290 mlt_properties test_properties
= MLT_FRAME_PROPERTIES( test_frame
);
291 mlt_properties_set_double( test_properties
, "consumer_aspect_ratio", mlt_properties_get_double( properties
, "consumer_aspect_ratio" ) );
292 mlt_properties_set( test_properties
, "rescale.interp", mlt_properties_get( properties
, "rescale.interp" ) );
293 mlt_frame_get_image( test_frame
, buffer
, format
, width
, height
, writable
);
294 mlt_properties_set_data( properties
, "test_card_frame", test_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
295 mlt_properties_set_data( properties
, "image", *buffer
, *width
* *height
* 2, NULL
, NULL
);
296 mlt_properties_set_int( properties
, "width", *width
);
297 mlt_properties_set_int( properties
, "height", *height
);
298 mlt_properties_set_int( properties
, "format", *format
);
299 mlt_properties_set_double( properties
, "aspect_ratio", mlt_frame_get_aspect_ratio( test_frame
) );
303 mlt_properties_set_data( properties
, "test_card_producer", NULL
, 0, NULL
, NULL
);
304 mlt_frame_get_image( this, buffer
, format
, width
, height
, writable
);
313 *width
= *width
== 0 ?
720 : *width
;
314 *height
= *height
== 0 ?
576 : *height
;
315 size
= *width
* *height
;
317 mlt_properties_set_int( properties
, "format", *format
);
318 mlt_properties_set_int( properties
, "width", *width
);
319 mlt_properties_set_int( properties
, "height", *height
);
320 mlt_properties_set_int( properties
, "aspect_ratio", 0 );
328 case mlt_image_rgb24
:
331 *buffer
= mlt_pool_alloc( size
);
333 memset( *buffer
, 255, size
);
335 case mlt_image_rgb24a
:
336 case mlt_image_opengl
:
339 *buffer
= mlt_pool_alloc( size
);
341 memset( *buffer
, 255, size
);
343 case mlt_image_yuv422
:
346 *buffer
= mlt_pool_alloc( size
);
349 while ( p
!= NULL
&& p
!= q
)
355 case mlt_image_yuv420p
:
357 *buffer
= mlt_pool_alloc( size
);
359 memset( *buffer
, 255, size
);
363 mlt_properties_set_data( properties
, "image", *buffer
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
364 mlt_properties_set_int( properties
, "test_image", 1 );
367 mlt_properties_set_int( properties
, "scaled_width", *width
);
368 mlt_properties_set_int( properties
, "scaled_height", *height
);
373 uint8_t *mlt_frame_get_alpha_mask( mlt_frame
this )
375 uint8_t *alpha
= NULL
;
378 if ( this->get_alpha_mask
!= NULL
)
379 alpha
= this->get_alpha_mask( this );
381 alpha
= mlt_properties_get_data( &this->parent
, "alpha", NULL
);
384 int size
= mlt_properties_get_int( &this->parent
, "scaled_width" ) * mlt_properties_get_int( &this->parent
, "scaled_height" );
385 alpha
= mlt_pool_alloc( size
);
386 memset( alpha
, 255, size
);
387 mlt_properties_set_data( &this->parent
, "alpha", alpha
, size
, mlt_pool_release
, NULL
);
393 int mlt_frame_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
395 mlt_get_audio get_audio
= mlt_frame_pop_audio( this );
396 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
397 int hide
= mlt_properties_get_int( properties
, "test_audio" );
399 if ( hide
== 0 && get_audio
!= NULL
)
401 mlt_position position
= mlt_frame_get_position( this );
402 get_audio( this, buffer
, format
, frequency
, channels
, samples
);
403 mlt_frame_set_position( this, position
);
405 else if ( mlt_properties_get_data( properties
, "audio", NULL
) )
407 *buffer
= mlt_properties_get_data( properties
, "audio", NULL
);
408 *frequency
= mlt_properties_get_int( properties
, "audio_frequency" );
409 *channels
= mlt_properties_get_int( properties
, "audio_channels" );
410 *samples
= mlt_properties_get_int( properties
, "audio_samples" );
415 *samples
= *samples
<= 0 ?
1920 : *samples
;
416 *channels
= *channels
<= 0 ?
2 : *channels
;
417 *frequency
= *frequency
<= 0 ?
48000 : *frequency
;
418 size
= *samples
* *channels
* sizeof( int16_t );
419 *buffer
= mlt_pool_alloc( size
);
420 if ( *buffer
!= NULL
)
421 memset( *buffer
, 0, size
);
422 mlt_properties_set_data( properties
, "audio", *buffer
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
423 mlt_properties_set_int( properties
, "test_audio", 1 );
426 mlt_properties_set_int( properties
, "audio_frequency", *frequency
);
427 mlt_properties_set_int( properties
, "audio_channels", *channels
);
428 mlt_properties_set_int( properties
, "audio_samples", *samples
);
430 if ( mlt_properties_get( properties
, "meta.volume" ) )
432 double value
= mlt_properties_get_double( properties
, "meta.volume" );
436 memset( *buffer
, 0, *samples
* *channels
* 2 );
438 else if ( value
!= 1.0 )
440 int total
= *samples
* *channels
;
441 int16_t *p
= *buffer
;
449 mlt_properties_set( properties
, "meta.volume", NULL
);
455 unsigned char *mlt_frame_get_waveform( mlt_frame
this, int w
, int h
)
458 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
459 mlt_audio_format format
= mlt_audio_pcm
;
460 int frequency
= 32000; // lower frequency available?
462 double fps
= mlt_properties_get_double( properties
, "fps" );
463 int samples
= mlt_sample_calculator( fps
, frequency
, mlt_frame_get_position( this ) );
466 mlt_frame_get_audio( this, &pcm
, &format
, &frequency
, &channels
, &samples
);
468 // Make an 8-bit buffer large enough to hold rendering
470 unsigned char *bitmap
= ( unsigned char* )mlt_pool_alloc( size
);
471 if ( bitmap
!= NULL
)
472 memset( bitmap
, 0, size
);
473 mlt_properties_set_data( properties
, "waveform", bitmap
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
475 // Render vertical lines
476 int16_t *ubound
= pcm
+ samples
* channels
;
477 int skip
= samples
/ w
- 1;
480 // Iterate sample stream and along x coordinate
481 for ( i
= 0; i
< w
&& pcm
< ubound
; i
++ )
483 // pcm data has channels interleaved
484 for ( j
= 0; j
< channels
; j
++ )
486 // Determine sample's magnitude from 2s complement;
487 int pcm_magnitude
= *pcm
< 0 ?
~(*pcm
) + 1 : *pcm
;
488 // The height of a line is the ratio of the magnitude multiplied by
489 // half the vertical resolution
490 int height
= ( int )( ( double )( pcm_magnitude
) / 32768 * h
/ 2 );
491 // Determine the starting y coordinate - left channel above center,
492 // right channel below - currently assumes 2 channels
493 int displacement
= ( h
/ 2 ) - ( 1 - j
) * height
;
494 // Position buffer pointer using y coordinate, stride, and x coordinate
495 unsigned char *p
= &bitmap
[ i
+ displacement
* w
];
497 // Draw vertical line
498 for ( k
= 0; k
< height
; k
++ )
503 pcm
+= skip
* channels
;
509 mlt_producer
mlt_frame_get_original_producer( mlt_frame
this )
512 return mlt_properties_get_data( MLT_FRAME_PROPERTIES( this ), "_producer", NULL
);
516 void mlt_frame_close( mlt_frame
this )
518 if ( this != NULL
&& mlt_properties_dec_ref( MLT_FRAME_PROPERTIES( this ) ) <= 0 )
520 mlt_deque_close( this->stack_image
);
521 mlt_deque_close( this->stack_audio
);
522 while( mlt_deque_peek_back( this->stack_service
) )
523 mlt_service_close( mlt_deque_pop_back( this->stack_service
) );
524 mlt_deque_close( this->stack_service
);
525 mlt_properties_close( &this->parent
);
530 /***** convenience functions *****/
532 int mlt_convert_yuv422_to_rgb24a( uint8_t *yuv
, uint8_t *rgba
, unsigned int total
)
543 YUV2RGB(yy
, uu
, vv
, r
, g
, b
);
549 YUV2RGB(yy
, uu
, vv
, r
, g
, b
);
560 int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba
, int width
, int height
, int stride
, uint8_t *yuv
, uint8_t *alpha
)
563 register int y0
, y1
, u0
, u1
, v0
, v1
;
564 register int r
, g
, b
;
565 register uint8_t *d
= yuv
;
568 for ( i
= 0; i
< height
; i
++ )
570 register uint8_t *s
= rgba
+ ( stride
* i
);
571 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
577 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
582 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
594 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
602 int mlt_convert_rgb24_to_yuv422( uint8_t *rgb
, int width
, int height
, int stride
, uint8_t *yuv
)
605 register int y0
, y1
, u0
, u1
, v0
, v1
;
606 register int r
, g
, b
;
607 register uint8_t *d
= yuv
;
610 for ( i
= 0; i
< height
; i
++ )
612 register uint8_t *s
= rgb
+ ( stride
* i
);
613 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
618 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
622 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
633 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
641 int mlt_convert_bgr24a_to_yuv422( uint8_t *rgba
, int width
, int height
, int stride
, uint8_t *yuv
, uint8_t *alpha
)
644 register int y0
, y1
, u0
, u1
, v0
, v1
;
645 register int r
, g
, b
;
646 register uint8_t *d
= yuv
;
649 for ( i
= 0; i
< height
; i
++ )
651 register uint8_t *s
= rgba
+ ( stride
* i
);
652 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
658 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
663 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
675 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
683 int mlt_convert_bgr24_to_yuv422( uint8_t *rgb
, int width
, int height
, int stride
, uint8_t *yuv
)
686 register int y0
, y1
, u0
, u1
, v0
, v1
;
687 register int r
, g
, b
;
688 register uint8_t *d
= yuv
;
691 for ( i
= 0; i
< height
; i
++ )
693 register uint8_t *s
= rgb
+ ( stride
* i
);
694 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
699 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
703 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
714 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
722 int mlt_convert_argb_to_yuv422( uint8_t *rgba
, int width
, int height
, int stride
, uint8_t *yuv
, uint8_t *alpha
)
725 register int y0
, y1
, u0
, u1
, v0
, v1
;
726 register int r
, g
, b
;
727 register uint8_t *d
= yuv
;
730 for ( i
= 0; i
< height
; i
++ )
732 register uint8_t *s
= rgba
+ ( stride
* i
);
733 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
739 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
744 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
756 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
764 int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p
, int width
, int height
, int stride
, uint8_t *yuv
)
769 int half
= width
>> 1;
771 uint8_t *Y
= yuv420p
;
772 uint8_t *U
= Y
+ width
* height
;
773 uint8_t *V
= U
+ width
* height
/ 4;
775 register uint8_t *d
= yuv
;
777 for ( i
= 0; i
< height
; i
++ )
779 register uint8_t *u
= U
+ ( i
/ 2 ) * ( half
);
780 register uint8_t *v
= V
+ ( i
/ 2 ) * ( half
);
782 for ( j
= 0; j
< half
; j
++ )
793 uint8_t *mlt_resize_alpha( uint8_t *input
, int owidth
, int oheight
, int iwidth
, int iheight
, uint8_t alpha_value
)
795 uint8_t *output
= NULL
;
797 if ( input
!= NULL
&& ( iwidth
!= owidth
|| iheight
!= oheight
) && ( owidth
> 6 && oheight
> 6 ) )
800 int offset_x
= ( owidth
- iwidth
) / 2;
801 int offset_y
= ( oheight
- iheight
) / 2;
804 output
= mlt_pool_alloc( owidth
* oheight
);
805 memset( output
, alpha_value
, owidth
* oheight
);
807 offset_x
-= offset_x
% 2;
809 out_line
= output
+ offset_y
* owidth
;
810 out_line
+= offset_x
;
812 // Loop for the entirety of our output height.
815 // We're in the input range for this row.
816 memcpy( out_line
, input
, iused
);
818 // Move to next input line
821 // Move to next output line
829 void mlt_resize_yuv422( uint8_t *output
, int owidth
, int oheight
, uint8_t *input
, int iwidth
, int iheight
)
832 int istride
= iwidth
* 2;
833 int ostride
= owidth
* 2;
834 int offset_x
= ( owidth
- iwidth
);
835 int offset_y
= ( oheight
- iheight
) / 2;
836 uint8_t *in_line
= input
;
838 int size
= owidth
* oheight
;
841 // Optimisation point
842 if ( output
== NULL
|| input
== NULL
|| ( owidth
<= 6 || oheight
<= 6 || iwidth
<= 6 || oheight
<= 6 ) )
846 else if ( iwidth
== owidth
&& iheight
== oheight
)
848 memcpy( output
, input
, iheight
* istride
);
858 offset_x
-= offset_x
% 4;
860 out_line
= output
+ offset_y
* ostride
;
861 out_line
+= offset_x
;
863 // Loop for the entirety of our output height.
866 // We're in the input range for this row.
867 memcpy( out_line
, in_line
, iwidth
* 2 );
869 // Move to next input line
872 // Move to next output line
877 /** A resizing function for yuv422 frames - this does not rescale, but simply
878 resizes. It assumes yuv422 images available on the frame so use with care.
881 uint8_t *mlt_frame_resize_yuv422( mlt_frame
this, int owidth
, int oheight
)
884 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
886 // Get the input image, width and height
887 uint8_t *input
= mlt_properties_get_data( properties
, "image", NULL
);
888 uint8_t *alpha
= mlt_frame_get_alpha_mask( this );
890 int iwidth
= mlt_properties_get_int( properties
, "width" );
891 int iheight
= mlt_properties_get_int( properties
, "height" );
893 // If width and height are correct, don't do anything
894 if ( iwidth
!= owidth
|| iheight
!= oheight
)
896 uint8_t alpha_value
= mlt_properties_get_int( properties
, "resize_alpha" );
898 // Create the output image
899 uint8_t *output
= mlt_pool_alloc( owidth
* ( oheight
+ 1 ) * 2 );
901 // Call the generic resize
902 mlt_resize_yuv422( output
, owidth
, oheight
, input
, iwidth
, iheight
);
904 // Now update the frame
905 mlt_properties_set_data( properties
, "image", output
, owidth
* ( oheight
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
906 mlt_properties_set_int( properties
, "width", owidth
);
907 mlt_properties_set_int( properties
, "height", oheight
);
909 // We should resize the alpha too
910 alpha
= mlt_resize_alpha( alpha
, owidth
, oheight
, iwidth
, iheight
, alpha_value
);
913 mlt_properties_set_data( properties
, "alpha", alpha
, owidth
* oheight
, ( mlt_destructor
)mlt_pool_release
, NULL
);
914 this->get_alpha_mask
= NULL
;
920 // No change, return input
924 /** A rescaling function for yuv422 frames - low quality, and provided for testing
925 only. It assumes yuv422 images available on the frame so use with care.
928 uint8_t *mlt_frame_rescale_yuv422( mlt_frame
this, int owidth
, int oheight
)
931 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
933 // Get the input image, width and height
934 uint8_t *input
= mlt_properties_get_data( properties
, "image", NULL
);
935 int iwidth
= mlt_properties_get_int( properties
, "width" );
936 int iheight
= mlt_properties_get_int( properties
, "height" );
938 // If width and height are correct, don't do anything
939 if ( iwidth
!= owidth
|| iheight
!= oheight
)
941 // Create the output image
942 uint8_t *output
= mlt_pool_alloc( owidth
* ( oheight
+ 1 ) * 2 );
945 int istride
= iwidth
* 2;
946 int ostride
= owidth
* 2;
948 iwidth
= iwidth
- ( iwidth
% 4 );
950 // Derived coordinates
954 int out_x_range
= owidth
/ 2;
955 int out_y_range
= oheight
/ 2;
956 int in_x_range
= iwidth
/ 2;
957 int in_y_range
= iheight
/ 2;
960 register uint8_t *out_line
= output
;
961 register uint8_t *out_ptr
;
963 // Calculate a middle pointer
964 uint8_t *in_middle
= input
+ istride
* in_y_range
+ in_x_range
* 2;
967 // Generate the affine transform scaling values
968 register int scale_width
= ( iwidth
<< 16 ) / owidth
;
969 register int scale_height
= ( iheight
<< 16 ) / oheight
;
970 register int base
= 0;
972 int outer
= out_x_range
* scale_width
;
973 int bottom
= out_y_range
* scale_height
;
975 // Loop for the entirety of our output height.
976 for ( dy
= - bottom
; dy
< bottom
; dy
+= scale_height
)
978 // Start at the beginning of the line
981 // Pointer to the middle of the input line
982 in_line
= in_middle
+ ( dy
>> 16 ) * istride
;
984 // Loop for the entirety of our output row.
985 for ( dx
= - outer
; dx
< outer
; dx
+= scale_width
)
989 *out_ptr
++ = *( in_line
+ base
);
991 *out_ptr
++ = *( in_line
+ base
+ 1 );
995 *out_ptr
++ = *( in_line
+ base
);
997 *out_ptr
++ = *( in_line
+ base
+ 3 );
1000 // Move to next output line
1001 out_line
+= ostride
;
1004 // Now update the frame
1005 mlt_properties_set_data( properties
, "image", output
, owidth
* ( oheight
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
1006 mlt_properties_set_int( properties
, "width", owidth
);
1007 mlt_properties_set_int( properties
, "height", oheight
);
1009 // Return the output
1013 // No change, return input
1017 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
)
1020 int16_t *src
, *dest
;
1021 int frequency_src
= *frequency
, frequency_dest
= *frequency
;
1022 int channels_src
= *channels
, channels_dest
= *channels
;
1023 int samples_src
= *samples
, samples_dest
= *samples
;
1025 double d
= 0, s
= 0;
1027 mlt_frame_get_audio( that
, &src
, format
, &frequency_src
, &channels_src
, &samples_src
);
1028 mlt_frame_get_audio( this, &dest
, format
, &frequency_dest
, &channels_dest
, &samples_dest
);
1030 int silent
= mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "silent_audio" );
1031 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "silent_audio", 0 );
1033 memset( dest
, 0, samples_dest
* channels_dest
* sizeof( int16_t ) );
1035 silent
= mlt_properties_get_int( MLT_FRAME_PROPERTIES( that
), "silent_audio" );
1036 mlt_properties_set_int( MLT_FRAME_PROPERTIES( that
), "silent_audio", 0 );
1038 memset( src
, 0, samples_src
* channels_src
* sizeof( int16_t ) );
1040 if ( channels_src
> 6 )
1042 if ( channels_dest
> 6 )
1044 if ( samples_src
> 4000 )
1046 if ( samples_dest
> 4000 )
1049 // determine number of samples to process
1050 *samples
= samples_src
< samples_dest ? samples_src
: samples_dest
;
1051 *channels
= channels_src
< channels_dest ? channels_src
: channels_dest
;
1053 *frequency
= frequency_dest
;
1055 // Compute a smooth ramp over start to end
1056 float weight
= weight_start
;
1057 float weight_step
= ( weight_end
- weight_start
) / *samples
;
1061 *samples
= samples_src
;
1062 *channels
= channels_src
;
1064 *frequency
= frequency_src
;
1069 for ( i
= 0; i
< *samples
; i
++ )
1071 for ( j
= 0; j
< *channels
; j
++ )
1073 if ( j
< channels_dest
)
1074 d
= (double) dest
[ i
* channels_dest
+ j
];
1075 if ( j
< channels_src
)
1076 s
= (double) src
[ i
* channels_src
+ j
];
1077 dest
[ i
* channels_dest
+ j
] = s
* weight
+ d
* ( 1.0 - weight
);
1079 weight
+= weight_step
;
1085 // Replacement for broken mlt_frame_audio_mix - this filter uses an inline low pass filter
1086 // to allow mixing without volume hacking
1087 int mlt_frame_combine_audio( mlt_frame
this, mlt_frame that
, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
1090 int16_t *src
, *dest
;
1091 int frequency_src
= *frequency
, frequency_dest
= *frequency
;
1092 int channels_src
= *channels
, channels_dest
= *channels
;
1093 int samples_src
= *samples
, samples_dest
= *samples
;
1096 double b_weight
= 1.0;
1098 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "meta.mixdown" ) )
1099 b_weight
= 1.0 - mlt_properties_get_double( MLT_FRAME_PROPERTIES( this ), "meta.volume" );
1101 mlt_frame_get_audio( that
, &src
, format
, &frequency_src
, &channels_src
, &samples_src
);
1102 mlt_frame_get_audio( this, &dest
, format
, &frequency_dest
, &channels_dest
, &samples_dest
);
1104 int silent
= mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "silent_audio" );
1105 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "silent_audio", 0 );
1107 memset( dest
, 0, samples_dest
* channels_dest
* sizeof( int16_t ) );
1109 silent
= mlt_properties_get_int( MLT_FRAME_PROPERTIES( that
), "silent_audio" );
1110 mlt_properties_set_int( MLT_FRAME_PROPERTIES( that
), "silent_audio", 0 );
1112 memset( src
, 0, samples_src
* channels_src
* sizeof( int16_t ) );
1116 *samples
= samples_src
;
1117 *channels
= channels_src
;
1119 *frequency
= frequency_src
;
1123 // determine number of samples to process
1124 *samples
= samples_src
< samples_dest ? samples_src
: samples_dest
;
1125 *channels
= channels_src
< channels_dest ? channels_src
: channels_dest
;
1127 *frequency
= frequency_dest
;
1129 for ( j
= 0; j
< *channels
; j
++ )
1130 vp
[ j
] = ( double )dest
[ j
];
1133 double B
= exp(-2.0 * M_PI
* Fc
);
1137 for ( i
= 0; i
< *samples
; i
++ )
1139 for ( j
= 0; j
< *channels
; j
++ )
1141 v
= ( double )( b_weight
* dest
[ i
* channels_dest
+ j
] + src
[ i
* channels_src
+ j
] );
1142 v
= v
< -32767 ?
-32767 : v
> 32768 ?
32768 : v
;
1143 vp
[ j
] = dest
[ i
* channels_dest
+ j
] = ( int16_t )( v
* A
+ vp
[ j
] * B
);
1150 /* Will this break when mlt_position is converted to double? -Zach */
1151 int mlt_sample_calculator( float fps
, int frequency
, int64_t position
)
1155 if ( ( int )( fps
* 100 ) == 2997 )
1157 samples
= frequency
/ 30;
1159 switch ( frequency
)
1162 if ( position
% 5 != 0 )
1166 if ( position
% 300 == 0 )
1168 else if ( position
% 30 == 0 )
1170 else if ( position
% 2 == 0 )
1176 if ( position
% 30 == 0 )
1178 else if ( position
% 29 == 0 )
1180 else if ( position
% 4 == 2 )
1189 else if ( fps
!= 0 )
1191 samples
= frequency
/ fps
;
1197 int64_t mlt_sample_calculator_to_now( float fps
, int frequency
, int64_t frame
)
1199 int64_t samples
= 0;
1201 // TODO: Correct rules for NTSC and drop the * 100 hack
1202 if ( ( int )( fps
* 100 ) == 2997 )
1204 samples
= ( ( double )( frame
* frequency
) / 30 );
1208 samples
+= 2 * ( frame
/ 5 );
1211 samples
+= frame
+ ( frame
/ 2 ) - ( frame
/ 30 ) + ( frame
/ 300 );
1214 samples
+= ( 2 * frame
) - ( frame
/ 4 ) - ( frame
/ 29 );
1218 else if ( fps
!= 0 )
1220 samples
= ( ( frame
* frequency
) / ( int )fps
);