2 * mlt_frame.c -- interface for all frame classes
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 #include "mlt_frame.h"
23 #include "mlt_producer.h"
28 /** Constructor for a frame.
31 mlt_frame mlt_frame_init( )
34 mlt_frame this = calloc( sizeof( struct mlt_frame_s ), 1 );
38 // Initialise the properties
39 mlt_properties properties = &this->parent;
40 mlt_properties_init( properties, this );
42 // Set default properties on the frame
43 mlt_properties_set_position( properties, "_position", 0.0 );
44 mlt_properties_set_data( properties, "image", NULL, 0, NULL, NULL );
45 mlt_properties_set_int( properties, "width", 720 );
46 mlt_properties_set_int( properties, "height", 576 );
47 mlt_properties_set_double( properties, "aspect_ratio", 4.0 / 3.0 );
48 mlt_properties_set_data( properties, "audio", NULL, 0, NULL, NULL );
49 mlt_properties_set_data( properties, "alpha", NULL, 0, NULL, NULL );
54 /** Fetch the frames properties.
57 mlt_properties mlt_frame_properties( mlt_frame this )
62 /** Check if we have a way to derive something other than a test card.
65 int mlt_frame_is_test_card( mlt_frame this )
67 return mlt_properties_get_int( mlt_frame_properties( this ), "test_image" );
70 /** Check if we have a way to derive something than test audio.
73 int mlt_frame_is_test_audio( mlt_frame this )
75 return this->get_audio == NULL || mlt_properties_get_int( mlt_frame_properties( this ), "test_audio" );
78 /** Get the aspect ratio of the frame.
81 double mlt_frame_get_aspect_ratio( mlt_frame this )
83 return mlt_properties_get_double( mlt_frame_properties( this ), "aspect_ratio" );
86 /** Set the aspect ratio of the frame.
89 int mlt_frame_set_aspect_ratio( mlt_frame this, double value )
91 return mlt_properties_set_double( mlt_frame_properties( this ), "aspect_ratio", value );
94 /** Get the position of this frame.
97 mlt_position mlt_frame_get_position( mlt_frame this )
99 return mlt_properties_get_position( mlt_frame_properties( this ), "_position" );
102 /** Set the position of this frame.
105 int mlt_frame_set_position( mlt_frame this, mlt_position value )
107 return mlt_properties_set_position( mlt_frame_properties( this ), "_position", value );
110 /** Stack a get_image callback.
113 int mlt_frame_push_get_image( mlt_frame this, mlt_get_image get_image )
115 int ret = this->stack_get_image_size >= 10;
117 this->stack_get_image[ this->stack_get_image_size ++ ] = get_image;
121 /** Pop a get_image callback.
124 mlt_get_image mlt_frame_pop_get_image( mlt_frame this )
126 mlt_get_image result = NULL;
127 if ( this->stack_get_image_size > 0 )
128 result = this->stack_get_image[ -- this->stack_get_image_size ];
135 int mlt_frame_push_frame( mlt_frame this, mlt_frame that )
137 int ret = this->stack_frame_size >= 10;
139 this->stack_frame[ this->stack_frame_size ++ ] = that;
146 mlt_frame mlt_frame_pop_frame( mlt_frame this )
148 mlt_frame result = NULL;
149 if ( this->stack_frame_size > 0 )
150 result = this->stack_frame[ -- this->stack_frame_size ];
154 int mlt_frame_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
156 mlt_properties properties = mlt_frame_properties( this );
157 mlt_get_image get_image = mlt_frame_pop_get_image( this );
158 mlt_producer producer = mlt_properties_get_data( properties, "test_card_producer", NULL );
160 if ( get_image != NULL )
162 return get_image( this, buffer, format, width, height, writable );
164 else if ( mlt_properties_get_data( properties, "image", NULL ) != NULL )
166 *format = mlt_image_yuv422;
167 *buffer = mlt_properties_get_data( properties, "image", NULL );
168 *width = mlt_properties_get_int( properties, "width" );
169 *height = mlt_properties_get_int( properties, "height" );
171 else if ( producer != NULL )
173 mlt_frame test_frame = NULL;
174 mlt_service_get_frame( mlt_producer_service( producer ), &test_frame, 0 );
175 if ( test_frame != NULL )
177 mlt_frame_get_image( test_frame, buffer, format, width, height, writable );
178 mlt_properties_inherit( mlt_frame_properties( this ), mlt_frame_properties( test_frame ) );
179 mlt_properties_set_data( properties, "test_card_frame", test_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
181 mlt_properties_set_data( properties, "image", *buffer, *width * *height * 2, NULL, NULL );
182 mlt_properties_set_int( properties, "width", *width );
183 mlt_properties_set_int( properties, "height", *height );
187 mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
188 mlt_frame_get_image( this, buffer, format, width, height, writable );
197 *width = *width == 0 ? 720 : *width;
198 *height = *height == 0 ? 576 : *height;
199 size = *width * *height;
201 mlt_properties_set_int( properties, "width", *width );
202 mlt_properties_set_int( properties, "height", *height );
210 case mlt_image_rgb24:
214 *buffer = malloc( size );
216 memset( *buffer, 255, size );
218 case mlt_image_rgb24a:
222 *buffer = malloc( size );
224 memset( *buffer, 255, size );
226 case mlt_image_yuv422:
230 *buffer = malloc( size );
233 while ( p != NULL && p != q )
239 case mlt_image_yuv420p:
241 *buffer = malloc( size );
243 memset( *buffer, 255, size );
247 mlt_properties_set_data( properties, "image", *buffer, size, free, NULL );
248 mlt_properties_set_int( properties, "test_image", 1 );
254 uint8_t *mlt_frame_get_alpha_mask( mlt_frame this )
256 if ( this->get_alpha_mask != NULL )
257 return this->get_alpha_mask( this );
261 int mlt_frame_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
263 mlt_properties properties = mlt_frame_properties( this );
265 if ( this->get_audio != NULL )
267 return this->get_audio( this, buffer, format, frequency, channels, samples );
272 *samples = *samples <= 0 ? 1920 : *samples;
273 *channels = *channels <= 0 ? 2 : *channels;
274 *frequency = *frequency <= 0 ? 48000 : *frequency;
275 size = *samples * *channels * sizeof( int16_t );
276 *buffer = malloc( size );
277 if ( *buffer != NULL )
278 memset( *buffer, 0, size );
279 mlt_properties_set_data( properties, "audio", *buffer, size, free, NULL );
280 mlt_properties_set_int( properties, "test_audio", 1 );
285 void mlt_frame_close( mlt_frame this )
287 mlt_properties_close( &this->parent );
291 /***** convenience functions *****/
292 #define RGB2YUV(r, g, b, y, u, v)\
293 y = (306*r + 601*g + 117*b) >> 10;\
294 u = ((-172*r - 340*g + 512*b) >> 10) + 128;\
295 v = ((512*r - 429*g - 83*b) >> 10) + 128;\
299 y = y > 255 ? 255 : y;\
300 u = u > 255 ? 255 : u;\
301 v = v > 255 ? 255 : v
303 int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha )
306 register int y0, y1, u0, u1, v0, v1;
307 register int r, g, b;
308 register uint8_t *d = yuv;
311 for ( i = 0; i < height; i++ )
313 register uint8_t *s = rgba + ( stride * i );
314 for ( j = 0; j < ( width / 2 ); j++ )
320 RGB2YUV (r, g, b, y0, u0 , v0);
325 RGB2YUV (r, g, b, y1, u1 , v1);
337 RGB2YUV (r, g, b, y0, u0 , v0);
345 int mlt_convert_rgb24_to_yuv422( uint8_t *rgb, int width, int height, int stride, uint8_t *yuv )
348 register int y0, y1, u0, u1, v0, v1;
349 register int r, g, b;
350 register uint8_t *d = yuv;
353 for ( i = 0; i < height; i++ )
355 register uint8_t *s = rgb + ( stride * i );
356 for ( j = 0; j < ( width / 2 ); j++ )
361 RGB2YUV (r, g, b, y0, u0 , v0);
365 RGB2YUV (r, g, b, y1, u1 , v1);
376 RGB2YUV (r, g, b, y0, u0 , v0);
384 int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p, int width, int height, int stride, uint8_t *yuv )
389 int half = width >> 1;
391 uint8_t *Y = yuv420p;
392 uint8_t *U = Y + width * height;
393 uint8_t *V = U + width * height / 4;
395 register uint8_t *d = yuv;
397 for ( i = 0; i < height; i++ )
399 register uint8_t *u = U + ( i / 2 ) * ( half );
400 register uint8_t *v = V + ( i / 2 ) * ( half );
402 for ( j = 0; j < half; j++ )
413 void *memfill( void *dst, void *src, int l, int elements )
420 uint8_t *src2 = src + 1;
421 for ( i = 0; i < elements; i ++ )
430 for ( i = 0; i < elements; i ++ )
431 dst = memcpy( dst, src, l ) + l;
436 void mlt_resize_yuv422( uint8_t *output, int owidth, int oheight, uint8_t *input, int iwidth, int iheight )
439 int istride = iwidth * 2;
440 int ostride = owidth * 2;
442 iwidth = iwidth - ( iwidth % 4 );
443 owidth = owidth - ( owidth % 4 );
444 iheight = iheight - ( iheight % 2 );
445 oheight = oheight - ( oheight % 2 );
447 // Optimisation point
448 if ( iwidth == owidth && iheight == oheight )
449 memcpy( output, input, iheight * istride );
451 // Coordinates (0,0 is middle of output)
455 int out_x_range = owidth / 2;
456 int out_y_range = oheight / 2;
457 int in_x_range = iwidth / 2 < out_x_range ? iwidth / 2 : out_x_range;
458 int in_y_range = iheight / 2 < out_y_range ? iheight / 2 : out_y_range;
461 uint8_t *out_line = output;
462 uint8_t *out_ptr = out_line;
464 // Calculate a middle and possibly invalid pointer in the input
465 uint8_t *in_middle = input + istride * ( iheight / 2 ) + ( iwidth / 2 ) * 2;
466 int in_line = - in_y_range * istride - in_x_range * 2;
468 uint8_t black[ 2 ] = { 16, 128 };
470 // Loop for the entirety of our output height.
471 for ( y = - out_y_range; y < out_y_range ; y ++ )
473 // Start at the beginning of the line
476 if ( abs( y ) < iheight / 2 )
478 // Fill the outer part with black
479 out_ptr = memfill( out_ptr, black, 2, out_x_range - in_x_range );
481 // We're in the input range for this row.
482 memcpy( out_ptr, in_middle + in_line, 2 * iwidth );
483 out_ptr += 2 * iwidth;
485 // Fill the outer part with black
486 out_ptr = memfill( out_ptr, black, 2, out_x_range - in_x_range );
488 // Move to next input line
493 // Fill whole line with black
494 out_ptr = memfill( out_ptr, black, 2, owidth );
497 // Move to next output line
502 /** A resizing function for yuv422 frames - this does not rescale, but simply
503 resizes. It assumes yuv422 images available on the frame so use with care.
506 uint8_t *mlt_frame_resize_yuv422( mlt_frame this, int owidth, int oheight )
509 mlt_properties properties = mlt_frame_properties( this );
511 // Get the input image, width and height
512 uint8_t *input = mlt_properties_get_data( properties, "image", NULL );
513 int iwidth = mlt_properties_get_int( properties, "width" );
514 int iheight = mlt_properties_get_int( properties, "height" );
516 // If width and height are correct, don't do anything
517 if ( iwidth != owidth || iheight != oheight )
519 // Create the output image
521 uint8_t *output = malloc( owidth * ( oheight + 1 ) * 2 );
523 // Call the generic resize
524 mlt_resize_yuv422( output, owidth, oheight, input, iwidth, iheight );
526 // Now update the frame
527 mlt_properties_set_data( properties, "image", output, owidth * ( oheight + 1 ) * 2, free, NULL );
528 mlt_properties_set_int( properties, "width", owidth );
529 mlt_properties_set_int( properties, "height", oheight );
534 // No change, return input
538 /** A rescaling function for yuv422 frames - low quality, and provided for testing
539 only. It assumes yuv422 images available on the frame so use with care.
542 uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight )
545 mlt_properties properties = mlt_frame_properties( this );
547 // Get the input image, width and height
548 uint8_t *input = mlt_properties_get_data( properties, "image", NULL );
549 int iwidth = mlt_properties_get_int( properties, "width" );
550 int iheight = mlt_properties_get_int( properties, "height" );
552 // If width and height are correct, don't do anything
553 if ( iwidth != owidth || iheight != oheight )
555 // Create the output image
557 uint8_t *output = malloc( owidth * ( oheight + 1 ) * 2 );
560 int istride = iwidth * 2;
561 int ostride = owidth * 2;
563 iwidth = iwidth - ( iwidth % 4 );
565 // Coordinates (0,0 is middle of output)
568 // Derived coordinates
572 int out_x_range = owidth / 2;
573 int out_y_range = oheight / 2;
574 int in_x_range = iwidth / 2;
575 int in_y_range = iheight / 2;
578 uint8_t *out_line = output;
581 // Calculate a middle pointer
582 uint8_t *in_middle = input + istride * in_y_range + in_x_range * 2;
586 // Generate the affine transform scaling values
587 int scale_width = ( iwidth << 16 ) / owidth;
588 int scale_height = ( iheight << 16 ) / oheight;
590 // Loop for the entirety of our output height.
591 for ( y = - out_y_range; y < out_y_range ; y ++ )
593 // Calculate the derived y value
594 dy = ( scale_height * y ) >> 16;
596 // Start at the beginning of the line
599 // Pointer to the middle of the input line
600 in_line = in_middle + dy * istride;
602 // Loop for the entirety of our output row.
603 for ( x = - out_x_range; x < out_x_range; x += 1 )
605 // Calculated the derived x
606 dx = ( scale_width * x ) >> 16;
608 // We're in the input range for this row.
609 in_ptr = in_line + ( dx << 1 );
610 *out_ptr ++ = *in_ptr ++;
611 in_ptr = in_line + ( ( dx >> 1 ) << 2 ) + ( ( x & 1 ) << 1 ) + 1;
612 *out_ptr ++ = *in_ptr;
615 // Move to next output line
619 // Now update the frame
620 mlt_properties_set_data( properties, "image", output, owidth * oheight * 2, free, NULL );
621 mlt_properties_set_int( properties, "width", owidth );
622 mlt_properties_set_int( properties, "height", oheight );
628 // No change, return input
632 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 )
635 int16_t *p_src, *p_dest;
637 //static int16_t *extra_src = NULL, *extra_dest = NULL;
638 static int extra_src_samples = 0, extra_dest_samples = 0;
639 int frequency_src = *frequency, frequency_dest = *frequency;
640 int channels_src = *channels, channels_dest = *channels;
641 int samples_src = *samples, samples_dest = *samples;
645 mlt_frame_get_audio( this, &p_dest, format, &frequency_dest, &channels_dest, &samples_dest );
646 //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" ) );
647 mlt_frame_get_audio( that, &p_src, format, &frequency_src, &channels_src, &samples_src );
648 //fprintf( stderr, "mix: frame src samples %d channels %d\n", samples_src, channels_src );
651 if ( channels_src > 6 )
653 if ( channels_dest > 6 )
655 if ( samples_src > 4000 )
657 if ( samples_dest > 4000 )
661 // Append new samples to leftovers
662 if ( extra_dest_samples > 0 )
664 fprintf( stderr, "prepending %d samples to dest\n", extra_dest_samples );
665 dest = realloc( extra_dest, ( samples_dest + extra_dest_samples ) * 2 * channels_dest );
666 memcpy( &extra_dest[ extra_dest_samples * channels_dest ], p_dest, samples_dest * 2 * channels_dest );
670 if ( extra_src_samples > 0 )
672 fprintf( stderr, "prepending %d samples to src\n", extra_src_samples );
673 src = realloc( extra_src, ( samples_src + extra_src_samples ) * 2 * channels_src );
674 memcpy( &extra_src[ extra_src_samples * channels_src ], p_src, samples_src * 2 * channels_src );
680 // determine number of samples to process
681 if ( samples_src + extra_src_samples < samples_dest + extra_dest_samples )
682 *samples = samples_src + extra_src_samples;
683 else if ( samples_dest + extra_dest_samples < samples_src + extra_src_samples )
684 *samples = samples_dest + extra_dest_samples;
686 *channels = channels_src < channels_dest ? channels_src : channels_dest;
688 *frequency = frequency_dest;
690 // Compute a smooth ramp over start to end
691 float weight = weight_start;
692 float weight_step = ( weight_end - weight_start ) / *samples;
695 for ( i = 0; i < *samples; i++ )
697 for ( j = 0; j < *channels; j++ )
699 if ( j < channels_dest )
700 d = (double) dest[ i * channels_dest + j ];
701 if ( j < channels_src )
702 s = (double) src[ i * channels_src + j ];
703 dest[ i * channels_dest + j ] = s * weight + d * ( 1.0 - weight );
705 weight += weight_step;
708 // We have to copy --sigh
709 if ( dest != p_dest )
710 memcpy( p_dest, dest, *samples * 2 * *channels );
713 // Store the leftovers
714 if ( samples_src + extra_src_samples < samples_dest + extra_dest_samples )
716 extra_dest_samples = ( samples_dest + extra_dest_samples ) - ( samples_src + extra_src_samples );
717 size_t size = extra_dest_samples * 2 * channels_dest;
718 fprintf( stderr, "storing %d samples from dest\n", extra_dest_samples );
721 extra_dest = malloc( size );
723 memcpy( extra_dest, &p_dest[ ( samples_dest - extra_dest_samples - 1 ) * channels_dest ], size );
725 extra_dest_samples = 0;
727 else if ( samples_dest + extra_dest_samples < samples_src + extra_src_samples )
729 extra_src_samples = ( samples_src + extra_src_samples ) - ( samples_dest + extra_dest_samples );
730 size_t size = extra_src_samples * 2 * channels_src;
731 fprintf( stderr, "storing %d samples from src\n", extra_dest_samples );
734 extra_src = malloc( size );
736 memcpy( extra_src, &p_src[ ( samples_src - extra_src_samples - 1 ) * channels_src ], size );
738 extra_src_samples = 0;
745 int mlt_sample_calculator( float fps, int frequency, int64_t position )
749 if ( fps > 29 && fps <= 30 )
751 samples = frequency / 30;
756 if ( position % 5 != 0 )
760 if ( position % 300 == 0 )
762 else if ( position % 30 == 0 )
764 else if ( position % 2 == 0 )
770 if ( position % 30 == 0 )
772 else if ( position % 29 == 0 )
774 else if ( position % 4 == 2 )
785 samples = frequency / fps;