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"
25 #include "mlt_profile.h"
32 /** Constructor for a frame.
35 mlt_frame
mlt_frame_init( )
38 mlt_frame
this = calloc( sizeof( struct mlt_frame_s
), 1 );
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
);
49 mlt_properties_set_int( properties
, "width", mlt_profile_get()->width
);
50 mlt_properties_set_int( properties
, "height", mlt_profile_get()->height
);
51 mlt_properties_set_int( properties
, "normalised_width", mlt_profile_get()->width
);
52 mlt_properties_set_int( properties
, "normalised_height", mlt_profile_get()->height
);
53 mlt_properties_set_double( properties
, "aspect_ratio", mlt_profile_sar( NULL
) );
54 mlt_properties_set_data( properties
, "audio", NULL
, 0, NULL
, NULL
);
55 mlt_properties_set_data( properties
, "alpha", NULL
, 0, NULL
, NULL
);
57 // Construct stacks for frames and methods
58 this->stack_image
= mlt_deque_init( );
59 this->stack_audio
= mlt_deque_init( );
60 this->stack_service
= mlt_deque_init( );
66 /** Fetch the frames properties.
69 mlt_properties
mlt_frame_properties( mlt_frame
this )
71 return this != NULL ?
&this->parent
: NULL
;
74 /** Check if we have a way to derive something other than a test card.
77 int mlt_frame_is_test_card( mlt_frame
this )
79 return mlt_deque_count( this->stack_image
) == 0 || mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "test_image" );
82 /** Check if we have a way to derive something other than test audio.
85 int mlt_frame_is_test_audio( mlt_frame
this )
87 return mlt_deque_count( this->stack_audio
) == 0 || mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "test_audio" );
90 /** Get the aspect ratio of the frame.
93 double mlt_frame_get_aspect_ratio( mlt_frame
this )
95 return mlt_properties_get_double( MLT_FRAME_PROPERTIES( this ), "aspect_ratio" );
98 /** Set the aspect ratio of the frame.
101 int mlt_frame_set_aspect_ratio( mlt_frame
this, double value
)
103 return mlt_properties_set_double( MLT_FRAME_PROPERTIES( this ), "aspect_ratio", value
);
106 /** Get the position of this frame.
109 mlt_position
mlt_frame_get_position( mlt_frame
this )
111 int pos
= mlt_properties_get_position( MLT_FRAME_PROPERTIES( this ), "_position" );
112 return pos
< 0 ?
0 : pos
;
115 /** Set the position of this frame.
118 int mlt_frame_set_position( mlt_frame
this, mlt_position value
)
120 return mlt_properties_set_position( MLT_FRAME_PROPERTIES( this ), "_position", value
);
123 /** Stack a get_image callback.
126 int mlt_frame_push_get_image( mlt_frame
this, mlt_get_image get_image
)
128 return mlt_deque_push_back( this->stack_image
, get_image
);
131 /** Pop a get_image callback.
134 mlt_get_image
mlt_frame_pop_get_image( mlt_frame
this )
136 return mlt_deque_pop_back( this->stack_image
);
142 int mlt_frame_push_frame( mlt_frame
this, mlt_frame that
)
144 return mlt_deque_push_back( this->stack_image
, that
);
150 mlt_frame
mlt_frame_pop_frame( mlt_frame
this )
152 return mlt_deque_pop_back( this->stack_image
);
158 int mlt_frame_push_service( mlt_frame
this, void *that
)
160 return mlt_deque_push_back( this->stack_image
, that
);
166 void *mlt_frame_pop_service( mlt_frame
this )
168 return mlt_deque_pop_back( this->stack_image
);
174 int mlt_frame_push_service_int( mlt_frame
this, int that
)
176 return mlt_deque_push_back_int( this->stack_image
, that
);
182 int mlt_frame_pop_service_int( mlt_frame
this )
184 return mlt_deque_pop_back_int( this->stack_image
);
187 /** Push an audio item on the stack.
190 int mlt_frame_push_audio( mlt_frame
this, void *that
)
192 return mlt_deque_push_back( this->stack_audio
, that
);
195 /** Pop an audio item from the stack
198 void *mlt_frame_pop_audio( mlt_frame
this )
200 return mlt_deque_pop_back( this->stack_audio
);
203 /** Return the service stack
206 mlt_deque
mlt_frame_service_stack( mlt_frame
this )
208 return this->stack_service
;
211 /** Replace image stack with the information provided.
213 This might prove to be unreliable and restrictive - the idea is that a transition
214 which normally uses two images may decide to only use the b frame (ie: in the case
215 of a composite where the b frame completely obscures the a frame).
217 The image must be writable and the destructor for the image itself must be taken
218 care of on another frame and that frame cannot have a replace applied to it...
219 Further it assumes that no alpha mask is in use.
221 For these reasons, it can only be used in a specific situation - when you have
222 multiple tracks each with their own transition and these transitions are applied
223 in a strictly reversed order (ie: highest numbered [lowest track] is processed
226 More reliable approach - the cases should be detected during the process phase
227 and the upper tracks should simply not be invited to stack...
230 void mlt_frame_replace_image( mlt_frame
this, uint8_t *image
, mlt_image_format format
, int width
, int height
)
232 // Remove all items from the stack
233 while( mlt_deque_pop_back( this->stack_image
) ) ;
235 // Update the information
236 mlt_properties_set_data( MLT_FRAME_PROPERTIES( this ), "image", image
, 0, NULL
, NULL
);
237 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "width", width
);
238 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "height", height
);
239 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "format", format
);
240 this->get_alpha_mask
= NULL
;
243 /** Get the image associated to the frame.
246 int mlt_frame_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
248 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
249 mlt_get_image get_image
= mlt_frame_pop_get_image( this );
250 mlt_producer producer
= mlt_properties_get_data( properties
, "test_card_producer", NULL
);
253 if ( get_image
!= NULL
)
255 mlt_properties_set_int( properties
, "image_count", mlt_properties_get_int( properties
, "image_count" ) - 1 );
256 mlt_position position
= mlt_frame_get_position( this );
257 error
= get_image( this, buffer
, format
, width
, height
, writable
);
258 mlt_properties_set_int( properties
, "width", *width
);
259 mlt_properties_set_int( properties
, "height", *height
);
260 mlt_properties_set_int( properties
, "format", *format
);
261 mlt_frame_set_position( this, position
);
263 else if ( mlt_properties_get_data( properties
, "image", NULL
) != NULL
)
265 *format
= mlt_properties_get_int( properties
, "format" );
266 *buffer
= mlt_properties_get_data( properties
, "image", NULL
);
267 *width
= mlt_properties_get_int( properties
, "width" );
268 *height
= mlt_properties_get_int( properties
, "height" );
270 else if ( producer
!= NULL
)
272 mlt_frame test_frame
= NULL
;
273 mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer
), &test_frame
, 0 );
274 if ( test_frame
!= NULL
)
276 mlt_properties test_properties
= MLT_FRAME_PROPERTIES( test_frame
);
277 mlt_properties_set_double( test_properties
, "consumer_aspect_ratio", mlt_properties_get_double( properties
, "consumer_aspect_ratio" ) );
278 mlt_properties_set( test_properties
, "rescale.interp", mlt_properties_get( properties
, "rescale.interp" ) );
279 mlt_frame_get_image( test_frame
, buffer
, format
, width
, height
, writable
);
280 mlt_properties_set_data( properties
, "test_card_frame", test_frame
, 0, ( mlt_destructor
)mlt_frame_close
, NULL
);
281 mlt_properties_set_data( properties
, "image", *buffer
, *width
* *height
* 2, NULL
, NULL
);
282 mlt_properties_set_int( properties
, "width", *width
);
283 mlt_properties_set_int( properties
, "height", *height
);
284 mlt_properties_set_int( properties
, "format", *format
);
285 mlt_properties_set_double( properties
, "aspect_ratio", mlt_frame_get_aspect_ratio( test_frame
) );
289 mlt_properties_set_data( properties
, "test_card_producer", NULL
, 0, NULL
, NULL
);
290 mlt_frame_get_image( this, buffer
, format
, width
, height
, writable
);
299 *width
= *width
== 0 ?
720 : *width
;
300 *height
= *height
== 0 ?
576 : *height
;
301 size
= *width
* *height
;
303 mlt_properties_set_int( properties
, "format", *format
);
304 mlt_properties_set_int( properties
, "width", *width
);
305 mlt_properties_set_int( properties
, "height", *height
);
306 mlt_properties_set_int( properties
, "aspect_ratio", 0 );
314 case mlt_image_rgb24
:
317 *buffer
= mlt_pool_alloc( size
);
319 memset( *buffer
, 255, size
);
321 case mlt_image_rgb24a
:
322 case mlt_image_opengl
:
325 *buffer
= mlt_pool_alloc( size
);
327 memset( *buffer
, 255, size
);
329 case mlt_image_yuv422
:
332 *buffer
= mlt_pool_alloc( size
);
335 while ( p
!= NULL
&& p
!= q
)
341 case mlt_image_yuv420p
:
343 *buffer
= mlt_pool_alloc( size
);
345 memset( *buffer
, 255, size
);
349 mlt_properties_set_data( properties
, "image", *buffer
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
350 mlt_properties_set_int( properties
, "test_image", 1 );
353 mlt_properties_set_int( properties
, "scaled_width", *width
);
354 mlt_properties_set_int( properties
, "scaled_height", *height
);
359 uint8_t *mlt_frame_get_alpha_mask( mlt_frame
this )
361 uint8_t *alpha
= NULL
;
364 if ( this->get_alpha_mask
!= NULL
)
365 alpha
= this->get_alpha_mask( this );
367 alpha
= mlt_properties_get_data( &this->parent
, "alpha", NULL
);
370 int size
= mlt_properties_get_int( &this->parent
, "scaled_width" ) * mlt_properties_get_int( &this->parent
, "scaled_height" );
371 alpha
= mlt_pool_alloc( size
);
372 memset( alpha
, 255, size
);
373 mlt_properties_set_data( &this->parent
, "alpha", alpha
, size
, mlt_pool_release
, NULL
);
379 int mlt_frame_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
381 mlt_get_audio get_audio
= mlt_frame_pop_audio( this );
382 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
383 int hide
= mlt_properties_get_int( properties
, "test_audio" );
385 if ( hide
== 0 && get_audio
!= NULL
)
387 mlt_position position
= mlt_frame_get_position( this );
388 get_audio( this, buffer
, format
, frequency
, channels
, samples
);
389 mlt_frame_set_position( this, position
);
391 else if ( mlt_properties_get_data( properties
, "audio", NULL
) )
393 *buffer
= mlt_properties_get_data( properties
, "audio", NULL
);
394 *frequency
= mlt_properties_get_int( properties
, "audio_frequency" );
395 *channels
= mlt_properties_get_int( properties
, "audio_channels" );
396 *samples
= mlt_properties_get_int( properties
, "audio_samples" );
401 *samples
= *samples
<= 0 ?
1920 : *samples
;
402 *channels
= *channels
<= 0 ?
2 : *channels
;
403 *frequency
= *frequency
<= 0 ?
48000 : *frequency
;
404 size
= *samples
* *channels
* sizeof( int16_t );
405 *buffer
= mlt_pool_alloc( size
);
406 if ( *buffer
!= NULL
)
407 memset( *buffer
, 0, size
);
408 mlt_properties_set_data( properties
, "audio", *buffer
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
409 mlt_properties_set_int( properties
, "test_audio", 1 );
412 mlt_properties_set_int( properties
, "audio_frequency", *frequency
);
413 mlt_properties_set_int( properties
, "audio_channels", *channels
);
414 mlt_properties_set_int( properties
, "audio_samples", *samples
);
416 if ( mlt_properties_get( properties
, "meta.volume" ) )
418 double value
= mlt_properties_get_double( properties
, "meta.volume" );
422 memset( *buffer
, 0, *samples
* *channels
* 2 );
424 else if ( value
!= 1.0 )
426 int total
= *samples
* *channels
;
427 int16_t *p
= *buffer
;
435 mlt_properties_set( properties
, "meta.volume", NULL
);
441 unsigned char *mlt_frame_get_waveform( mlt_frame
this, int w
, int h
)
444 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
445 mlt_audio_format format
= mlt_audio_pcm
;
446 int frequency
= 32000; // lower frequency available?
448 double fps
= mlt_properties_get_double( properties
, "fps" );
449 int samples
= mlt_sample_calculator( fps
, frequency
, mlt_frame_get_position( this ) );
452 mlt_frame_get_audio( this, &pcm
, &format
, &frequency
, &channels
, &samples
);
454 // Make an 8-bit buffer large enough to hold rendering
456 unsigned char *bitmap
= ( unsigned char* )mlt_pool_alloc( size
);
457 if ( bitmap
!= NULL
)
458 memset( bitmap
, 0, size
);
459 mlt_properties_set_data( properties
, "waveform", bitmap
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
461 // Render vertical lines
462 int16_t *ubound
= pcm
+ samples
* channels
;
463 int skip
= samples
/ w
- 1;
466 // Iterate sample stream and along x coordinate
467 for ( i
= 0; i
< w
&& pcm
< ubound
; i
++ )
469 // pcm data has channels interleaved
470 for ( j
= 0; j
< channels
; j
++ )
472 // Determine sample's magnitude from 2s complement;
473 int pcm_magnitude
= *pcm
< 0 ?
~(*pcm
) + 1 : *pcm
;
474 // The height of a line is the ratio of the magnitude multiplied by
475 // half the vertical resolution
476 int height
= ( int )( ( double )( pcm_magnitude
) / 32768 * h
/ 2 );
477 // Determine the starting y coordinate - left channel above center,
478 // right channel below - currently assumes 2 channels
479 int displacement
= ( h
/ 2 ) - ( 1 - j
) * height
;
480 // Position buffer pointer using y coordinate, stride, and x coordinate
481 unsigned char *p
= &bitmap
[ i
+ displacement
* w
];
483 // Draw vertical line
484 for ( k
= 0; k
< height
; k
++ )
489 pcm
+= skip
* channels
;
495 mlt_producer
mlt_frame_get_original_producer( mlt_frame
this )
498 return mlt_properties_get_data( MLT_FRAME_PROPERTIES( this ), "_producer", NULL
);
502 void mlt_frame_close( mlt_frame
this )
504 if ( this != NULL
&& mlt_properties_dec_ref( MLT_FRAME_PROPERTIES( this ) ) <= 0 )
506 mlt_deque_close( this->stack_image
);
507 mlt_deque_close( this->stack_audio
);
508 while( mlt_deque_peek_back( this->stack_service
) )
509 mlt_service_close( mlt_deque_pop_back( this->stack_service
) );
510 mlt_deque_close( this->stack_service
);
511 mlt_properties_close( &this->parent
);
516 /***** convenience functions *****/
518 int mlt_convert_yuv422_to_rgb24a( uint8_t *yuv
, uint8_t *rgba
, unsigned int total
)
529 YUV2RGB(yy
, uu
, vv
, r
, g
, b
);
535 YUV2RGB(yy
, uu
, vv
, r
, g
, b
);
546 int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba
, int width
, int height
, int stride
, uint8_t *yuv
, uint8_t *alpha
)
549 register int y0
, y1
, u0
, u1
, v0
, v1
;
550 register int r
, g
, b
;
551 register uint8_t *d
= yuv
;
555 for ( i
= 0; i
< height
; i
++ )
557 register uint8_t *s
= rgba
+ ( stride
* i
);
558 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
564 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
569 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
581 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
587 for ( i
= 0; i
< height
; i
++ )
589 register uint8_t *s
= rgba
+ ( stride
* i
);
590 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
596 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
601 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
613 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
622 int mlt_convert_rgb24_to_yuv422( uint8_t *rgb
, int width
, int height
, int stride
, uint8_t *yuv
)
625 register int y0
, y1
, u0
, u1
, v0
, v1
;
626 register int r
, g
, b
;
627 register uint8_t *d
= yuv
;
630 for ( i
= 0; i
< height
; i
++ )
632 register uint8_t *s
= rgb
+ ( stride
* i
);
633 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
638 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
642 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
653 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
661 int mlt_convert_bgr24a_to_yuv422( uint8_t *rgba
, int width
, int height
, int stride
, uint8_t *yuv
, uint8_t *alpha
)
664 register int y0
, y1
, u0
, u1
, v0
, v1
;
665 register int r
, g
, b
;
666 register uint8_t *d
= yuv
;
670 for ( i
= 0; i
< height
; i
++ )
672 register uint8_t *s
= rgba
+ ( stride
* i
);
673 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
679 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
684 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
696 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
702 for ( i
= 0; i
< height
; i
++ )
704 register uint8_t *s
= rgba
+ ( stride
* i
);
705 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
711 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
716 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
728 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
736 int mlt_convert_bgr24_to_yuv422( uint8_t *rgb
, int width
, int height
, int stride
, uint8_t *yuv
)
739 register int y0
, y1
, u0
, u1
, v0
, v1
;
740 register int r
, g
, b
;
741 register uint8_t *d
= yuv
;
744 for ( i
= 0; i
< height
; i
++ )
746 register uint8_t *s
= rgb
+ ( stride
* i
);
747 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
752 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
756 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
767 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
775 int mlt_convert_argb_to_yuv422( uint8_t *rgba
, int width
, int height
, int stride
, uint8_t *yuv
, uint8_t *alpha
)
778 register int y0
, y1
, u0
, u1
, v0
, v1
;
779 register int r
, g
, b
;
780 register uint8_t *d
= yuv
;
784 for ( i
= 0; i
< height
; i
++ )
786 register uint8_t *s
= rgba
+ ( stride
* i
);
787 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
793 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
798 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
810 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
816 for ( i
= 0; i
< height
; i
++ )
818 register uint8_t *s
= rgba
+ ( stride
* i
);
819 for ( j
= 0; j
< ( width
/ 2 ); j
++ )
825 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
830 RGB2YUV (r
, g
, b
, y1
, u1
, v1
);
842 RGB2YUV (r
, g
, b
, y0
, u0
, v0
);
850 int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p
, int width
, int height
, int stride
, uint8_t *yuv
)
855 int half
= width
>> 1;
857 uint8_t *Y
= yuv420p
;
858 uint8_t *U
= Y
+ width
* height
;
859 uint8_t *V
= U
+ width
* height
/ 4;
861 register uint8_t *d
= yuv
;
863 for ( i
= 0; i
< height
; i
++ )
865 register uint8_t *u
= U
+ ( i
/ 2 ) * ( half
);
866 register uint8_t *v
= V
+ ( i
/ 2 ) * ( half
);
868 for ( j
= 0; j
< half
; j
++ )
879 uint8_t *mlt_resize_alpha( uint8_t *input
, int owidth
, int oheight
, int iwidth
, int iheight
, uint8_t alpha_value
)
881 uint8_t *output
= NULL
;
883 if ( input
!= NULL
&& ( iwidth
!= owidth
|| iheight
!= oheight
) && ( owidth
> 6 && oheight
> 6 ) )
886 int offset_x
= ( owidth
- iwidth
) / 2;
887 int offset_y
= ( oheight
- iheight
) / 2;
890 output
= mlt_pool_alloc( owidth
* oheight
);
891 memset( output
, alpha_value
, owidth
* oheight
);
893 offset_x
-= offset_x
% 2;
895 out_line
= output
+ offset_y
* owidth
;
896 out_line
+= offset_x
;
898 // Loop for the entirety of our output height.
901 // We're in the input range for this row.
902 memcpy( out_line
, input
, iused
);
904 // Move to next input line
907 // Move to next output line
915 void mlt_resize_yuv422( uint8_t *output
, int owidth
, int oheight
, uint8_t *input
, int iwidth
, int iheight
)
918 int istride
= iwidth
* 2;
919 int ostride
= owidth
* 2;
920 int offset_x
= ( owidth
- iwidth
);
921 int offset_y
= ( oheight
- iheight
) / 2;
922 uint8_t *in_line
= input
;
924 int size
= owidth
* oheight
;
927 // Optimisation point
928 if ( output
== NULL
|| input
== NULL
|| ( owidth
<= 6 || oheight
<= 6 || iwidth
<= 6 || oheight
<= 6 ) )
932 else if ( iwidth
== owidth
&& iheight
== oheight
)
934 memcpy( output
, input
, iheight
* istride
);
944 offset_x
-= offset_x
% 4;
946 out_line
= output
+ offset_y
* ostride
;
947 out_line
+= offset_x
;
949 // Loop for the entirety of our output height.
952 // We're in the input range for this row.
953 memcpy( out_line
, in_line
, iwidth
* 2 );
955 // Move to next input line
958 // Move to next output line
963 /** A resizing function for yuv422 frames - this does not rescale, but simply
964 resizes. It assumes yuv422 images available on the frame so use with care.
967 uint8_t *mlt_frame_resize_yuv422( mlt_frame
this, int owidth
, int oheight
)
970 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
972 // Get the input image, width and height
973 uint8_t *input
= mlt_properties_get_data( properties
, "image", NULL
);
974 uint8_t *alpha
= mlt_frame_get_alpha_mask( this );
976 int iwidth
= mlt_properties_get_int( properties
, "width" );
977 int iheight
= mlt_properties_get_int( properties
, "height" );
979 // If width and height are correct, don't do anything
980 if ( iwidth
!= owidth
|| iheight
!= oheight
)
982 uint8_t alpha_value
= mlt_properties_get_int( properties
, "resize_alpha" );
984 // Create the output image
985 uint8_t *output
= mlt_pool_alloc( owidth
* ( oheight
+ 1 ) * 2 );
987 // Call the generic resize
988 mlt_resize_yuv422( output
, owidth
, oheight
, input
, iwidth
, iheight
);
990 // Now update the frame
991 mlt_properties_set_data( properties
, "image", output
, owidth
* ( oheight
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
992 mlt_properties_set_int( properties
, "width", owidth
);
993 mlt_properties_set_int( properties
, "height", oheight
);
995 // We should resize the alpha too
996 alpha
= mlt_resize_alpha( alpha
, owidth
, oheight
, iwidth
, iheight
, alpha_value
);
999 mlt_properties_set_data( properties
, "alpha", alpha
, owidth
* oheight
, ( mlt_destructor
)mlt_pool_release
, NULL
);
1000 this->get_alpha_mask
= NULL
;
1003 // Return the output
1006 // No change, return input
1010 /** A rescaling function for yuv422 frames - low quality, and provided for testing
1011 only. It assumes yuv422 images available on the frame so use with care.
1014 uint8_t *mlt_frame_rescale_yuv422( mlt_frame
this, int owidth
, int oheight
)
1017 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
1019 // Get the input image, width and height
1020 uint8_t *input
= mlt_properties_get_data( properties
, "image", NULL
);
1021 int iwidth
= mlt_properties_get_int( properties
, "width" );
1022 int iheight
= mlt_properties_get_int( properties
, "height" );
1024 // If width and height are correct, don't do anything
1025 if ( iwidth
!= owidth
|| iheight
!= oheight
)
1027 // Create the output image
1028 uint8_t *output
= mlt_pool_alloc( owidth
* ( oheight
+ 1 ) * 2 );
1030 // Calculate strides
1031 int istride
= iwidth
* 2;
1032 int ostride
= owidth
* 2;
1034 iwidth
= iwidth
- ( iwidth
% 4 );
1036 // Derived coordinates
1040 int out_x_range
= owidth
/ 2;
1041 int out_y_range
= oheight
/ 2;
1042 int in_x_range
= iwidth
/ 2;
1043 int in_y_range
= iheight
/ 2;
1046 register uint8_t *out_line
= output
;
1047 register uint8_t *out_ptr
;
1049 // Calculate a middle pointer
1050 uint8_t *in_middle
= input
+ istride
* in_y_range
+ in_x_range
* 2;
1053 // Generate the affine transform scaling values
1054 register int scale_width
= ( iwidth
<< 16 ) / owidth
;
1055 register int scale_height
= ( iheight
<< 16 ) / oheight
;
1056 register int base
= 0;
1058 int outer
= out_x_range
* scale_width
;
1059 int bottom
= out_y_range
* scale_height
;
1061 // Loop for the entirety of our output height.
1062 for ( dy
= - bottom
; dy
< bottom
; dy
+= scale_height
)
1064 // Start at the beginning of the line
1067 // Pointer to the middle of the input line
1068 in_line
= in_middle
+ ( dy
>> 16 ) * istride
;
1070 // Loop for the entirety of our output row.
1071 for ( dx
= - outer
; dx
< outer
; dx
+= scale_width
)
1075 *out_ptr
++ = *( in_line
+ base
);
1077 *out_ptr
++ = *( in_line
+ base
+ 1 );
1081 *out_ptr
++ = *( in_line
+ base
);
1083 *out_ptr
++ = *( in_line
+ base
+ 3 );
1086 // Move to next output line
1087 out_line
+= ostride
;
1090 // Now update the frame
1091 mlt_properties_set_data( properties
, "image", output
, owidth
* ( oheight
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
1092 mlt_properties_set_int( properties
, "width", owidth
);
1093 mlt_properties_set_int( properties
, "height", oheight
);
1095 // Return the output
1099 // No change, return input
1103 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
)
1106 int16_t *src
, *dest
;
1107 int frequency_src
= *frequency
, frequency_dest
= *frequency
;
1108 int channels_src
= *channels
, channels_dest
= *channels
;
1109 int samples_src
= *samples
, samples_dest
= *samples
;
1111 double d
= 0, s
= 0;
1113 mlt_frame_get_audio( that
, &src
, format
, &frequency_src
, &channels_src
, &samples_src
);
1114 mlt_frame_get_audio( this, &dest
, format
, &frequency_dest
, &channels_dest
, &samples_dest
);
1116 int silent
= mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "silent_audio" );
1117 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "silent_audio", 0 );
1119 memset( dest
, 0, samples_dest
* channels_dest
* sizeof( int16_t ) );
1121 silent
= mlt_properties_get_int( MLT_FRAME_PROPERTIES( that
), "silent_audio" );
1122 mlt_properties_set_int( MLT_FRAME_PROPERTIES( that
), "silent_audio", 0 );
1124 memset( src
, 0, samples_src
* channels_src
* sizeof( int16_t ) );
1126 if ( channels_src
> 6 )
1128 if ( channels_dest
> 6 )
1130 if ( samples_src
> 4000 )
1132 if ( samples_dest
> 4000 )
1135 // determine number of samples to process
1136 *samples
= samples_src
< samples_dest ? samples_src
: samples_dest
;
1137 *channels
= channels_src
< channels_dest ? channels_src
: channels_dest
;
1139 *frequency
= frequency_dest
;
1141 // Compute a smooth ramp over start to end
1142 float weight
= weight_start
;
1143 float weight_step
= ( weight_end
- weight_start
) / *samples
;
1147 *samples
= samples_src
;
1148 *channels
= channels_src
;
1150 *frequency
= frequency_src
;
1155 for ( i
= 0; i
< *samples
; i
++ )
1157 for ( j
= 0; j
< *channels
; j
++ )
1159 if ( j
< channels_dest
)
1160 d
= (double) dest
[ i
* channels_dest
+ j
];
1161 if ( j
< channels_src
)
1162 s
= (double) src
[ i
* channels_src
+ j
];
1163 dest
[ i
* channels_dest
+ j
] = s
* weight
+ d
* ( 1.0 - weight
);
1165 weight
+= weight_step
;
1171 // Replacement for broken mlt_frame_audio_mix - this filter uses an inline low pass filter
1172 // to allow mixing without volume hacking
1173 int mlt_frame_combine_audio( mlt_frame
this, mlt_frame that
, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
1176 int16_t *src
, *dest
;
1177 int frequency_src
= *frequency
, frequency_dest
= *frequency
;
1178 int channels_src
= *channels
, channels_dest
= *channels
;
1179 int samples_src
= *samples
, samples_dest
= *samples
;
1182 double b_weight
= 1.0;
1184 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "meta.mixdown" ) )
1185 b_weight
= 1.0 - mlt_properties_get_double( MLT_FRAME_PROPERTIES( this ), "meta.volume" );
1187 mlt_frame_get_audio( that
, &src
, format
, &frequency_src
, &channels_src
, &samples_src
);
1188 mlt_frame_get_audio( this, &dest
, format
, &frequency_dest
, &channels_dest
, &samples_dest
);
1190 int silent
= mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "silent_audio" );
1191 mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "silent_audio", 0 );
1193 memset( dest
, 0, samples_dest
* channels_dest
* sizeof( int16_t ) );
1195 silent
= mlt_properties_get_int( MLT_FRAME_PROPERTIES( that
), "silent_audio" );
1196 mlt_properties_set_int( MLT_FRAME_PROPERTIES( that
), "silent_audio", 0 );
1198 memset( src
, 0, samples_src
* channels_src
* sizeof( int16_t ) );
1202 *samples
= samples_src
;
1203 *channels
= channels_src
;
1205 *frequency
= frequency_src
;
1209 // determine number of samples to process
1210 *samples
= samples_src
< samples_dest ? samples_src
: samples_dest
;
1211 *channels
= channels_src
< channels_dest ? channels_src
: channels_dest
;
1213 *frequency
= frequency_dest
;
1215 for ( j
= 0; j
< *channels
; j
++ )
1216 vp
[ j
] = ( double )dest
[ j
];
1219 double B
= exp(-2.0 * M_PI
* Fc
);
1223 for ( i
= 0; i
< *samples
; i
++ )
1225 for ( j
= 0; j
< *channels
; j
++ )
1227 v
= ( double )( b_weight
* dest
[ i
* channels_dest
+ j
] + src
[ i
* channels_src
+ j
] );
1228 v
= v
< -32767 ?
-32767 : v
> 32768 ?
32768 : v
;
1229 vp
[ j
] = dest
[ i
* channels_dest
+ j
] = ( int16_t )( v
* A
+ vp
[ j
] * B
);
1236 /* Will this break when mlt_position is converted to double? -Zach */
1237 int mlt_sample_calculator( float fps
, int frequency
, int64_t position
)
1241 if ( ( int )( fps
* 100 ) == 2997 )
1243 samples
= frequency
/ 30;
1245 switch ( frequency
)
1248 if ( position
% 5 != 0 )
1252 if ( position
% 300 == 0 )
1254 else if ( position
% 30 == 0 )
1256 else if ( position
% 2 == 0 )
1262 if ( position
% 30 == 0 )
1264 else if ( position
% 29 == 0 )
1266 else if ( position
% 4 == 2 )
1275 else if ( fps
!= 0 )
1277 samples
= frequency
/ fps
;
1283 int64_t mlt_sample_calculator_to_now( float fps
, int frequency
, int64_t frame
)
1285 int64_t samples
= 0;
1287 // TODO: Correct rules for NTSC and drop the * 100 hack
1288 if ( ( int )( fps
* 100 ) == 2997 )
1290 samples
= ( ( double )( frame
* frequency
) / 30 );
1294 samples
+= 2 * ( frame
/ 5 );
1297 samples
+= frame
+ ( frame
/ 2 ) - ( frame
/ 30 ) + ( frame
/ 300 );
1300 samples
+= ( 2 * frame
) - ( frame
/ 4 ) - ( frame
/ 29 );
1304 else if ( fps
!= 0 )
1306 samples
= ( ( frame
* frequency
) / ( int )fps
);