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 convert_mlt_to_av_cs( mlt_image_format format
)
38 value
= PIX_FMT_RGB24
;
40 case mlt_image_rgb24a
:
41 value
= PIX_FMT_RGBA32
;
43 case mlt_image_yuv422
:
44 value
= PIX_FMT_YUV422
;
46 case mlt_image_yuv420p
:
47 value
= PIX_FMT_YUV420P
;
49 case mlt_image_opengl
:
51 fprintf( stderr
, "Invalid format...\n" );
58 static inline void convert_image( uint8_t *out
, uint8_t *in
, int out_fmt
, int in_fmt
, int width
, int height
)
62 avpicture_fill( &output
, out
, out_fmt
, width
, height
);
63 avpicture_fill( &input
, in
, in_fmt
, width
, height
);
64 img_convert( &output
, out_fmt
, &input
, in_fmt
, width
, height
);
70 static int filter_get_image( mlt_frame
this, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
72 mlt_filter filter
= mlt_frame_pop_service( this );
73 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
74 int output_format
= *format
;
75 mlt_image_format forced
= mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter
), "forced" );
78 // Allow this filter to force processing in a colour space other than requested
79 *format
= forced
!= 0 ? forced
: *format
;
81 error
= mlt_frame_get_image( this, image
, format
, width
, height
, 0 );
83 if ( error
== 0 && *format
!= output_format
&& *image
!= NULL
&& output_format
!= mlt_image_opengl
)
85 int in_fmt
= convert_mlt_to_av_cs( *format
);
86 int out_fmt
= convert_mlt_to_av_cs( output_format
);
87 int size
= avpicture_get_size( out_fmt
, *width
, *height
);
88 uint8_t *output
= mlt_pool_alloc( size
);
89 convert_image( output
, *image
, out_fmt
, in_fmt
, *width
, *height
);
91 // Special case for alpha rgb input
92 if ( *format
== mlt_image_rgb24a
)
94 register uint8_t *alpha
= mlt_frame_get_alpha_mask( this );
95 register int len
= *width
* *height
;
96 register uint8_t *bits
= *image
;
97 register int n
= ( len
+ 7 ) / 8;
99 // TODO: Proper check for big endian systems
104 // Extract alpha mask from the image using Duff's Device
107 case 0: do { *alpha
++ = *bits
; bits
+= 4;
108 case 7: *alpha
++ = *bits
; bits
+= 4;
109 case 6: *alpha
++ = *bits
; bits
+= 4;
110 case 5: *alpha
++ = *bits
; bits
+= 4;
111 case 4: *alpha
++ = *bits
; bits
+= 4;
112 case 3: *alpha
++ = *bits
; bits
+= 4;
113 case 2: *alpha
++ = *bits
; bits
+= 4;
114 case 1: *alpha
++ = *bits
; bits
+= 4;
122 *format
= output_format
;
123 mlt_properties_set_data( properties
, "image", output
, size
, mlt_pool_release
, NULL
);
124 mlt_properties_set_int( properties
, "format", output_format
);
126 // Special case for alpha rgb output
127 if ( *format
== mlt_image_rgb24a
)
130 register uint8_t *alpha
= mlt_frame_get_alpha_mask( this );
134 register uint8_t *bits
= *image
;
135 register int len
= *width
* *height
;
136 register int n
= ( len
+ 7 ) / 8;
138 // TODO: Proper check for big endian systems
143 // Merge the alpha mask into the RGB image using Duff's Device
146 case 0: do { *bits
= *alpha
++; bits
+= 4;
147 case 7: *bits
= *alpha
++; bits
+= 4;
148 case 6: *bits
= *alpha
++; bits
+= 4;
149 case 5: *bits
= *alpha
++; bits
+= 4;
150 case 4: *bits
= *alpha
++; bits
+= 4;
151 case 3: *bits
= *alpha
++; bits
+= 4;
152 case 2: *bits
= *alpha
++; bits
+= 4;
153 case 1: *bits
= *alpha
++; bits
+= 4;
160 else if ( error
== 0 && *format
!= output_format
&& *image
!= NULL
&& output_format
== mlt_image_opengl
)
162 if ( *format
== mlt_image_yuv422
)
164 int size
= *width
* *height
* 4;
165 uint8_t *output
= mlt_pool_alloc( size
);
168 uint8_t *o
= output
+ size
;
171 uint8_t *alpha
= mlt_frame_get_alpha_mask( this ) + *width
* *height
;
181 YUV2RGB( *p
, *( p
+ 1 ), *( p
+ 3 ), r
, g
, b
);
186 YUV2RGB( *( p
+ 2 ), *( p
+ 1 ), *( p
+ 3 ), r
, g
, b
);
198 mlt_properties_set_data( properties
, "image", output
, size
, mlt_pool_release
, NULL
);
199 mlt_properties_set_int( properties
, "format", output_format
);
201 *format
= output_format
;
208 /** Filter processing.
211 static mlt_frame
filter_process( mlt_filter
this, mlt_frame frame
)
213 mlt_frame_push_service( frame
, this );
214 mlt_frame_push_get_image( frame
, filter_get_image
);
218 /** Constructor for the filter.
221 mlt_filter
filter_avcolour_space_init( void *arg
)
223 mlt_filter
this = mlt_filter_new( );
225 this->process
= filter_process
;