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 )
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 if ( get_image != NULL )
206 return get_image( this, buffer, format, width, height, writable );
208 else if ( mlt_properties_get_data( properties, "image", NULL ) != NULL )
210 *format = mlt_image_yuv422;
211 *buffer = mlt_properties_get_data( properties, "image", NULL );
212 *width = mlt_properties_get_int( properties, "width" );
213 *height = mlt_properties_get_int( properties, "height" );
215 else if ( producer != NULL )
217 mlt_frame test_frame = NULL;
218 mlt_service_get_frame( mlt_producer_service( producer ), &test_frame, 0 );
219 if ( test_frame != NULL )
221 mlt_properties test_properties = mlt_frame_properties( test_frame );
222 mlt_properties_set_double( test_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "consumer_aspect_ratio" ) );
223 mlt_properties_set( test_properties, "rescale.interp", "nearest" );
224 mlt_frame_get_image( test_frame, buffer, format, width, height, writable );
225 mlt_properties_set_data( properties, "test_card_frame", test_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
226 mlt_properties_set_data( properties, "image", *buffer, *width * *height * 2, NULL, NULL );
227 mlt_properties_set_int( properties, "width", *width );
228 mlt_properties_set_int( properties, "height", *height );
232 mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
233 mlt_frame_get_image( this, buffer, format, width, height, writable );
242 *width = *width == 0 ? 720 : *width;
243 *height = *height == 0 ? 576 : *height;
244 size = *width * *height;
246 mlt_properties_set_int( properties, "width", *width );
247 mlt_properties_set_int( properties, "height", *height );
248 mlt_properties_set_int( properties, "aspect_ratio", 1 );
256 case mlt_image_rgb24:
259 *buffer = mlt_pool_alloc( size );
261 memset( *buffer, 255, size );
263 case mlt_image_rgb24a:
266 *buffer = mlt_pool_alloc( size );
268 memset( *buffer, 255, size );
270 case mlt_image_yuv422:
273 *buffer = mlt_pool_alloc( size );
276 while ( p != NULL && p != q )
282 case mlt_image_yuv420p:
284 *buffer = mlt_pool_alloc( size );
286 memset( *buffer, 255, size );
290 mlt_properties_set_data( properties, "image", *buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
291 mlt_properties_set_int( properties, "test_image", 1 );
297 uint8_t *mlt_frame_get_alpha_mask( mlt_frame this )
299 if ( this->get_alpha_mask != NULL )
300 return this->get_alpha_mask( this );
304 int mlt_frame_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
306 mlt_properties properties = mlt_frame_properties( this );
308 if ( this->get_audio != NULL )
310 return this->get_audio( this, buffer, format, frequency, channels, samples );
315 *samples = *samples <= 0 ? 1920 : *samples;
316 *channels = *channels <= 0 ? 2 : *channels;
317 *frequency = *frequency <= 0 ? 48000 : *frequency;
318 size = *samples * *channels * sizeof( int16_t );
319 *buffer = mlt_pool_alloc( size );
320 if ( *buffer != NULL )
321 memset( *buffer, 0, size );
322 mlt_properties_set_data( properties, "audio", *buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
323 mlt_properties_set_int( properties, "test_audio", 1 );
328 void mlt_frame_close( mlt_frame this )
332 mlt_deque_close( this->stack_image );
333 mlt_deque_close( this->stack_audio );
334 mlt_properties_close( &this->parent );
339 /***** convenience functions *****/
341 int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha )
344 register int y0, y1, u0, u1, v0, v1;
345 register int r, g, b;
346 register uint8_t *d = yuv;
349 for ( i = 0; i < height; i++ )
351 register uint8_t *s = rgba + ( stride * i );
352 for ( j = 0; j < ( width / 2 ); j++ )
358 RGB2YUV (r, g, b, y0, u0 , v0);
363 RGB2YUV (r, g, b, y1, u1 , v1);
375 RGB2YUV (r, g, b, y0, u0 , v0);
383 int mlt_convert_rgb24_to_yuv422( uint8_t *rgb, int width, int height, int stride, uint8_t *yuv )
386 register int y0, y1, u0, u1, v0, v1;
387 register int r, g, b;
388 register uint8_t *d = yuv;
391 for ( i = 0; i < height; i++ )
393 register uint8_t *s = rgb + ( stride * i );
394 for ( j = 0; j < ( width / 2 ); j++ )
399 RGB2YUV (r, g, b, y0, u0 , v0);
403 RGB2YUV (r, g, b, y1, u1 , v1);
414 RGB2YUV (r, g, b, y0, u0 , v0);
422 int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p, int width, int height, int stride, uint8_t *yuv )
427 int half = width >> 1;
429 uint8_t *Y = yuv420p;
430 uint8_t *U = Y + width * height;
431 uint8_t *V = U + width * height / 4;
433 register uint8_t *d = yuv;
435 for ( i = 0; i < height; i++ )
437 register uint8_t *u = U + ( i / 2 ) * ( half );
438 register uint8_t *v = V + ( i / 2 ) * ( half );
440 for ( j = 0; j < half; j++ )
451 void mlt_resize_yuv422( uint8_t *output, int owidth, int oheight, uint8_t *input, int iwidth, int iheight )
454 int istride = iwidth * 2;
455 int ostride = owidth * 2;
457 iwidth = iwidth - ( iwidth % 4 );
458 owidth = owidth - ( owidth % 4 );
459 iheight = iheight - ( iheight % 2 );
460 oheight = oheight - ( oheight % 2 );
462 // Optimisation point
463 if ( iwidth == owidth && iheight == oheight )
464 memcpy( output, input, iheight * istride );
466 // Coordinates (0,0 is middle of output)
470 int out_x_range = owidth / 2;
471 int out_y_range = oheight / 2;
472 int in_x_range = iwidth / 2 < out_x_range ? iwidth / 2 : out_x_range;
473 int in_y_range = iheight / 2 < out_y_range ? iheight / 2 : out_y_range;
476 uint8_t *out_line = output;
477 uint8_t *out_ptr = out_line;
479 // Calculate a middle and possibly invalid pointer in the input
480 uint8_t *in_middle = input + istride * ( iheight / 2 ) + ( iwidth / 2 ) * 2;
481 int in_line = - in_y_range * istride - in_x_range * 2;
485 // Fill whole section with black
486 y = out_y_range - ( iheight / 2 );
487 int blank_elements = ostride * y / 2;
488 elements = blank_elements;
489 while ( elements -- )
495 int active_width = 2 * iwidth;
496 int inactive_width = out_x_range - in_x_range;
500 // Loop for the entirety of our output height.
503 // Start at the beginning of the line
506 // Fill the outer part with black
507 elements = inactive_width;
508 while ( elements -- )
514 // We're in the input range for this row.
515 p = in_middle + in_line;
516 end = out_ptr + active_width;
517 while ( out_ptr != end )
523 // Fill the outer part with black
524 elements = inactive_width;
525 while ( elements -- )
531 // Move to next input line
534 // Move to next output line
538 // Fill whole section with black
539 elements = blank_elements;
540 while ( elements -- )
547 /** A resizing function for yuv422 frames - this does not rescale, but simply
548 resizes. It assumes yuv422 images available on the frame so use with care.
551 uint8_t *mlt_frame_resize_yuv422( mlt_frame this, int owidth, int oheight )
554 mlt_properties properties = mlt_frame_properties( this );
556 // Get the input image, width and height
557 uint8_t *input = mlt_properties_get_data( properties, "image", NULL );
558 int iwidth = mlt_properties_get_int( properties, "width" );
559 int iheight = mlt_properties_get_int( properties, "height" );
561 // If width and height are correct, don't do anything
562 if ( iwidth != owidth || iheight != oheight )
564 // Create the output image
565 uint8_t *output = mlt_pool_alloc( owidth * ( oheight + 1 ) * 2 );
567 // Call the generic resize
568 mlt_resize_yuv422( output, owidth, oheight, input, iwidth, iheight );
570 // Now update the frame
571 mlt_properties_set_data( properties, "image", output, owidth * ( oheight + 1 ) * 2, ( mlt_destructor )mlt_pool_release, NULL );
572 mlt_properties_set_int( properties, "width", owidth );
573 mlt_properties_set_int( properties, "height", oheight );
578 // No change, return input
582 /** A rescaling function for yuv422 frames - low quality, and provided for testing
583 only. It assumes yuv422 images available on the frame so use with care.
586 uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight )
589 mlt_properties properties = mlt_frame_properties( this );
591 // Get the input image, width and height
592 uint8_t *input = mlt_properties_get_data( properties, "image", NULL );
593 int iwidth = mlt_properties_get_int( properties, "width" );
594 int iheight = mlt_properties_get_int( properties, "height" );
596 // If width and height are correct, don't do anything
597 if ( iwidth != owidth || iheight != oheight )
599 // Create the output image
600 uint8_t *output = mlt_pool_alloc( owidth * ( oheight + 1 ) * 2 );
603 int istride = iwidth * 2;
604 int ostride = owidth * 2;
606 iwidth = iwidth - ( iwidth % 4 );
608 // Derived coordinates
612 int out_x_range = owidth / 2;
613 int out_y_range = oheight / 2;
614 int in_x_range = iwidth / 2;
615 int in_y_range = iheight / 2;
618 register uint8_t *out_line = output;
619 register uint8_t *out_ptr;
621 // Calculate a middle pointer
622 uint8_t *in_middle = input + istride * in_y_range + in_x_range * 2;
625 // Generate the affine transform scaling values
626 register int scale_width = ( iwidth << 16 ) / owidth;
627 register int scale_height = ( iheight << 16 ) / oheight;
628 register int base = 0;
630 int outer = out_x_range * scale_width;
631 int bottom = out_y_range * scale_height;
633 // Loop for the entirety of our output height.
634 for ( dy = - bottom; dy < bottom; dy += scale_height )
636 // Start at the beginning of the line
639 // Pointer to the middle of the input line
640 in_line = in_middle + ( dy >> 16 ) * istride;
642 // Loop for the entirety of our output row.
643 for ( dx = - outer; dx < outer; dx += scale_width )
647 *out_ptr ++ = *( in_line + base );
649 *out_ptr ++ = *( in_line + base + 1 );
653 *out_ptr ++ = *( in_line + base );
655 *out_ptr ++ = *( in_line + base + 3 );
658 // Move to next output line
662 // Now update the frame
663 mlt_properties_set_data( properties, "image", output, owidth * ( oheight + 1 ) * 2, ( mlt_destructor )mlt_pool_release, NULL );
664 mlt_properties_set_int( properties, "width", owidth );
665 mlt_properties_set_int( properties, "height", oheight );
671 // No change, return input
675 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 )
679 int frequency_src = *frequency, frequency_dest = *frequency;
680 int channels_src = *channels, channels_dest = *channels;
681 int samples_src = *samples, samples_dest = *samples;
685 mlt_frame_get_audio( this, &dest, format, &frequency_dest, &channels_dest, &samples_dest );
686 //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" ) );
687 mlt_frame_get_audio( that, &src, format, &frequency_src, &channels_src, &samples_src );
688 //fprintf( stderr, "mix: frame src samples %d channels %d\n", samples_src, channels_src );
690 if ( channels_src > 6 )
692 if ( channels_dest > 6 )
694 if ( samples_src > 4000 )
696 if ( samples_dest > 4000 )
699 // determine number of samples to process
700 *samples = samples_src < samples_dest ? samples_src : samples_dest;
701 *channels = channels_src < channels_dest ? channels_src : channels_dest;
703 *frequency = frequency_dest;
705 // Compute a smooth ramp over start to end
706 float weight = weight_start;
707 float weight_step = ( weight_end - weight_start ) / *samples;
710 for ( i = 0; i < *samples; i++ )
712 for ( j = 0; j < *channels; j++ )
714 if ( j < channels_dest )
715 d = (double) dest[ i * channels_dest + j ];
716 if ( j < channels_src )
717 s = (double) src[ i * channels_src + j ];
718 dest[ i * channels_dest + j ] = s * weight + d * ( 1.0 - weight );
720 weight += weight_step;
726 int mlt_sample_calculator( float fps, int frequency, int64_t position )
730 if ( fps > 29 && fps <= 30 )
732 samples = frequency / 30;
737 if ( position % 5 != 0 )
741 if ( position % 300 == 0 )
743 else if ( position % 30 == 0 )
745 else if ( position % 2 == 0 )
751 if ( position % 30 == 0 )
753 else if ( position % 29 == 0 )
755 else if ( position % 4 == 2 )
766 samples = frequency / fps;