2 * transition_luma.c -- a generic dissolve/wipe processor
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Dan Dennedy <dan@dennedy.org>
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.
21 #include "transition_luma.h"
22 #include <framework/mlt_frame.h>
34 struct mlt_transition_s parent
;
43 // forward declarations
44 static void transition_close( mlt_transition parent
);
47 // image processing functions
49 static inline float smoothstep( float edge1
, float edge2
, float a
)
57 a
= ( a
- edge1
) / ( edge2
- edge1
);
59 return ( a
* a
* ( 3 - 2 * a
) );
64 \param field_order -1 = progressive, 0 = lower field first, 1 = top field first
66 static void luma_composite( mlt_frame
this, mlt_frame b_frame
, int luma_width
, int luma_height
,
67 float *luma_bitmap
, float pos
, float frame_delta
, float softness
, int field_order
)
69 int width_src
= 0, height_src
= 0;
70 int width_dest
= 0, height_dest
= 0;
71 mlt_image_format format_src
= mlt_image_yuv422
, format_dest
= mlt_image_yuv422
;
72 uint8_t *p_src
, *p_dest
;
79 format_src
= mlt_image_yuv422
;
80 format_dest
= mlt_image_yuv422
;
82 mlt_frame_get_image( this, &p_dest
, &format_dest
, &width_dest
, &height_dest
, 1 /* writable */ );
83 mlt_frame_get_image( b_frame
, &p_src
, &format_src
, &width_src
, &height_src
, 0 /* writable */ );
85 stride_src
= width_src
* 2;
86 stride_dest
= width_dest
* 2;
88 // Offset the position based on which field we're looking at ...
90 field_pos
[ 0 ] = pos
+ ( ( field_order
== 0 ?
1 : 0 ) * frame_delta
* 0.5 );
91 field_pos
[ 1 ] = pos
+ ( ( field_order
== 0 ?
0 : 1 ) * frame_delta
* 0.5 );
93 // adjust the position for the softness level
94 field_pos
[ 0 ] *= ( 1.0 + softness
);
95 field_pos
[ 1 ] *= ( 1.0 + softness
);
106 // composite using luma map
107 for ( field
= 0; field
< ( field_order
< 0 ?
1 : 2 ); ++field
)
109 for ( i
= field
; i
< height_src
; i
+= ( field_order
< 0 ?
1 : 2 ) )
111 p
= &p_src
[ i
* stride_src
];
112 q
= &p_dest
[ i
* stride_dest
];
113 o
= &p_dest
[ i
* stride_dest
];
114 l
= &luma_bitmap
[ i
* luma_width
];
116 for ( j
= 0; j
< width_src
; j
++ )
121 value
= smoothstep( weight
, weight
+ softness
, field_pos
[ field
] );
123 *o
++ = (uint8_t)( y
* value
+ *q
++ * ( 1 - value
) );
124 *o
++ = (uint8_t)( uv
* value
+ *q
++ * ( 1 - value
) );
133 static int transition_get_image( mlt_frame
this, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
135 // Get the properties of the a frame
136 mlt_properties a_props
= mlt_frame_properties( this );
138 // Get the b frame from the stack
139 mlt_frame b_frame
= mlt_frame_pop_frame( this );
141 // Get the properties of the b frame
142 mlt_properties b_props
= mlt_frame_properties( b_frame
);
144 // Arbitrary composite defaults
145 float frame_delta
= 1 / mlt_properties_get_double( b_props
, "fps" );
146 float mix
= mlt_properties_get_double( b_props
, "image.mix" );
147 int luma_width
= mlt_properties_get_int( b_props
, "luma.width" );
148 int luma_height
= mlt_properties_get_int( b_props
, "luma.height" );
149 float *luma_bitmap
= mlt_properties_get_data( b_props
, "luma.bitmap", NULL
);
150 float luma_softness
= mlt_properties_get_double( b_props
, "luma.softness" );
151 int progressive
= mlt_properties_get_int( b_props
, "progressive" );
152 int top_field_first
= mlt_properties_get_int( b_props
, "top_field_first" );
153 int reverse
= mlt_properties_get_int( b_props
, "luma.reverse" );
155 // Honour the reverse here
156 mix
= reverse ?
1 - mix
: mix
;
158 if ( luma_width
> 0 && luma_height
> 0 && luma_bitmap
!= NULL
)
159 // Composite the frames using a luma map
160 luma_composite( this, b_frame
, luma_width
, luma_height
, luma_bitmap
, mix
, frame_delta
,
161 luma_softness
, progressive
> 0 ?
-1 : top_field_first
);
163 // Dissolve the frames using the time offset for mix value
164 mlt_frame_composite_yuv( this, b_frame
, 0, 0, mix
);
166 // Extract the a_frame image info
167 *width
= mlt_properties_get_int( a_props
, "width" );
168 *height
= mlt_properties_get_int( a_props
, "height" );
169 *image
= mlt_properties_get_data( a_props
, "image", NULL
);
174 /** Load the luma map from PGM stream.
177 static void luma_read_pgm( FILE *f
, float **map
, int *width
, int *height
)
179 uint8_t *data
= NULL
;
190 // get the magic code
191 if ( fgets( line
, 127, f
) == NULL
)
193 if ( line
[0] != 'P' || line
[1] != '5' )
196 // skip white space and see if a new line must be fetched
197 for ( i
= 2; i
< 127 && line
[i
] != '\0' && isspace( line
[i
] ); i
++ );
198 if ( line
[i
] == '\0' && fgets( line
, 127, f
) == NULL
)
201 // get the dimensions
202 if ( line
[0] == 'P' )
203 i
= sscanf( line
, "P5 %d %d %d", width
, height
, &maxval
);
205 i
= sscanf( line
, "%d %d %d", width
, height
, &maxval
);
207 // get the height value, if not yet
210 if ( fgets( line
, 127, f
) == NULL
)
212 i
= sscanf( line
, "%d", height
);
219 // get the maximum gray value, if not yet
222 if ( fgets( line
, 127, f
) == NULL
)
224 i
= sscanf( line
, "%d", &maxval
);
229 // determine if this is one or two bytes per pixel
230 bpp
= maxval
> 255 ?
2 : 1;
231 // allocate temporary storage for the raw data
232 data
= malloc( *width
* *height
* bpp
);
237 if ( fread( data
, *width
* *height
* bpp
, 1, f
) != 1 )
240 // allocate the luma bitmap
241 *map
= p
= (float*) malloc( *width
* *height
* sizeof( float ) );
245 // proces the raw data into the luma bitmap
246 for ( i
= 0; i
< *width
* *height
* bpp
; i
+= bpp
)
249 *p
++ = (float) data
[ i
] / (float) maxval
;
251 *p
++ = (float) ( ( data
[ i
] << 8 ) + data
[ i
+1 ] ) / (float) maxval
;
262 /** Luma transition processing.
265 static mlt_frame
transition_process( mlt_transition transition
, mlt_frame a_frame
, mlt_frame b_frame
)
267 transition_luma
*this = (transition_luma
*) transition
->child
;
269 // Get the properties of the transition
270 mlt_properties properties
= mlt_transition_properties( transition
);
272 // Get the properties of the b frame
273 mlt_properties b_props
= mlt_frame_properties( b_frame
);
275 // If the filename property changed, reload the map
276 char *luma_file
= mlt_properties_get( properties
, "resource" );
277 if ( luma_file
!= NULL
&& ( this->filename
== NULL
|| ( this->filename
&& strcmp( luma_file
, this->filename
) ) ) )
279 int width
= mlt_properties_get_int( b_props
, "width" );
280 int height
= mlt_properties_get_int( b_props
, "height" );
284 command
[ 511 ] = '\0';
285 if ( this->filename
)
286 free( this->filename
);
287 this->filename
= strdup( luma_file
);
288 snprintf( command
, 511, "anytopnm %s | pnmscale -width %d -height %d", luma_file
, width
, height
);
289 //pipe = popen( command, "r" );
290 pipe
= fopen( luma_file
, "r" );
294 free( this->bitmap
);
295 luma_read_pgm( pipe
, &this->bitmap
, &this->width
, &this->height
);
302 // Determine the time position of this frame in the transition duration
303 mlt_position in
= mlt_transition_get_in( transition
);
304 mlt_position out
= mlt_transition_get_out( transition
);
305 mlt_position time
= mlt_frame_get_position( b_frame
);
306 float pos
= ( float )( time
- in
) / ( float )( out
- in
+ 1 );
308 // Set the b frame properties
309 mlt_properties_set_double( b_props
, "image.mix", pos
);
310 mlt_properties_set_int( b_props
, "luma.width", this->width
);
311 mlt_properties_set_int( b_props
, "luma.height", this->height
);
312 mlt_properties_set_data( b_props
, "luma.bitmap", this->bitmap
, 0, NULL
, NULL
);
313 mlt_properties_set_int( b_props
, "luma.reverse", mlt_properties_get_int( properties
, "reverse" ) );
314 mlt_properties_set_double( b_props
, "luma.softness", mlt_properties_get_double( properties
, "softness" ) );
316 mlt_frame_push_get_image( a_frame
, transition_get_image
);
317 mlt_frame_push_frame( a_frame
, b_frame
);
322 /** Constructor for the filter.
325 mlt_transition
transition_luma_init( char *lumafile
)
327 transition_luma
*this = calloc( sizeof( transition_luma
), 1 );
330 mlt_transition transition
= &this->parent
;
331 mlt_transition_init( transition
, this );
332 transition
->process
= transition_process
;
333 transition
->close
= transition_close
;
335 if ( lumafile
!= NULL
)
336 mlt_properties_set( mlt_transition_properties( transition
), "resource", lumafile
);
338 return &this->parent
;
343 /** Close the transition.
346 static void transition_close( mlt_transition parent
)
348 transition_luma
*this = (transition_luma
*) parent
->child
;
351 free( this->bitmap
);
353 if ( this->filename
)
354 free( this->filename
);