2 * filter_avcolour_space.c -- Colour space filter
3 * Copyright (C) 2004-2005 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.
21 #include "filter_avcolour_space.h"
23 #include <framework/mlt_frame.h>
25 // ffmpeg Header files
31 static inline int is_big_endian( )
33 union
{ int i
; char c
[ 4 ]; } big_endian_test
;
34 big_endian_test
.i
= 1;
36 return big_endian_test
.c
[ 0 ] != 1;
39 static inline int convert_mlt_to_av_cs( mlt_image_format format
)
46 value
= PIX_FMT_RGB24
;
48 case mlt_image_rgb24a
:
49 value
= PIX_FMT_RGBA32
;
51 case mlt_image_yuv422
:
52 value
= PIX_FMT_YUV422
;
54 case mlt_image_yuv420p
:
55 value
= PIX_FMT_YUV420P
;
57 case mlt_image_opengl
:
59 fprintf( stderr
, "Invalid format...\n" );
66 static inline void convert_image( uint8_t *out
, uint8_t *in
, int out_fmt
, int in_fmt
, int width
, int height
)
70 avpicture_fill( &output
, out
, out_fmt
, width
, height
);
71 avpicture_fill( &input
, in
, in_fmt
, width
, height
);
72 img_convert( &output
, out_fmt
, &input
, in_fmt
, width
, height
);
78 static int filter_get_image( mlt_frame
this, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
80 mlt_filter filter
= mlt_frame_pop_service( this );
81 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
82 int output_format
= *format
;
83 mlt_image_format forced
= mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter
), "forced" );
86 // Allow this filter to force processing in a colour space other than requested
87 *format
= forced
!= 0 ? forced
: *format
;
89 error
= mlt_frame_get_image( this, image
, format
, width
, height
, 0 );
91 if ( error
== 0 && *format
!= output_format
&& *image
!= NULL
&& output_format
!= mlt_image_opengl
)
93 int in_fmt
= convert_mlt_to_av_cs( *format
);
94 int out_fmt
= convert_mlt_to_av_cs( output_format
);
95 int size
= avpicture_get_size( out_fmt
, *width
, *height
);
96 uint8_t *output
= mlt_pool_alloc( size
);
97 convert_image( output
, *image
, out_fmt
, in_fmt
, *width
, *height
);
99 // Special case for alpha rgb input
100 if ( *format
== mlt_image_rgb24a
)
102 register uint8_t *alpha
= mlt_frame_get_alpha_mask( this );
103 register int len
= *width
* *height
;
104 register uint8_t *bits
= *image
;
105 register int n
= ( len
+ 7 ) / 8;
107 if( !is_big_endian( ) )
110 // Extract alpha mask from the image using Duff's Device
113 case 0: do { *alpha
++ = *bits
; bits
+= 4;
114 case 7: *alpha
++ = *bits
; bits
+= 4;
115 case 6: *alpha
++ = *bits
; bits
+= 4;
116 case 5: *alpha
++ = *bits
; bits
+= 4;
117 case 4: *alpha
++ = *bits
; bits
+= 4;
118 case 3: *alpha
++ = *bits
; bits
+= 4;
119 case 2: *alpha
++ = *bits
; bits
+= 4;
120 case 1: *alpha
++ = *bits
; bits
+= 4;
128 *format
= output_format
;
129 mlt_properties_set_data( properties
, "image", output
, size
, mlt_pool_release
, NULL
);
130 mlt_properties_set_int( properties
, "format", output_format
);
132 // Special case for alpha rgb output
133 if ( *format
== mlt_image_rgb24a
)
136 register uint8_t *alpha
= mlt_frame_get_alpha_mask( this );
140 register uint8_t *bits
= *image
;
141 register int len
= *width
* *height
;
142 register int n
= ( len
+ 7 ) / 8;
144 if( !is_big_endian( ) )
147 // Merge the alpha mask into the RGB image using Duff's Device
150 case 0: do { *bits
= *alpha
++; bits
+= 4;
151 case 7: *bits
= *alpha
++; bits
+= 4;
152 case 6: *bits
= *alpha
++; bits
+= 4;
153 case 5: *bits
= *alpha
++; bits
+= 4;
154 case 4: *bits
= *alpha
++; bits
+= 4;
155 case 3: *bits
= *alpha
++; bits
+= 4;
156 case 2: *bits
= *alpha
++; bits
+= 4;
157 case 1: *bits
= *alpha
++; bits
+= 4;
164 else if ( error
== 0 && *format
!= output_format
&& *image
!= NULL
&& output_format
== mlt_image_opengl
)
166 if ( *format
== mlt_image_yuv422
)
168 int size
= *width
* *height
* 4;
169 uint8_t *output
= mlt_pool_alloc( size
);
172 uint8_t *o
= output
+ size
;
175 uint8_t *alpha
= mlt_frame_get_alpha_mask( this ) + *width
* *height
;
185 YUV2RGB( *p
, *( p
+ 1 ), *( p
+ 3 ), r
, g
, b
);
190 YUV2RGB( *( p
+ 2 ), *( p
+ 1 ), *( p
+ 3 ), r
, g
, b
);
202 mlt_properties_set_data( properties
, "image", output
, size
, mlt_pool_release
, NULL
);
203 mlt_properties_set_int( properties
, "format", output_format
);
205 *format
= output_format
;
212 /** Filter processing.
215 static mlt_frame
filter_process( mlt_filter
this, mlt_frame frame
)
217 mlt_frame_push_service( frame
, this );
218 mlt_frame_push_get_image( frame
, filter_get_image
);
222 /** Constructor for the filter.
225 mlt_filter
filter_avcolour_space_init( void *arg
)
227 mlt_filter
this = mlt_filter_new( );
229 this->process
= filter_process
;