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 library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <framework/mlt_filter.h>
22 #include <framework/mlt_frame.h>
24 // ffmpeg Header files
30 #if LIBAVUTIL_VERSION_INT < (50<<16)
31 #define PIX_FMT_RGB32 PIX_FMT_RGBA32
32 #define PIX_FMT_YUYV422 PIX_FMT_YUV422
38 static inline int is_big_endian( )
40 union
{ int i
; char c
[ 4 ]; } big_endian_test
;
41 big_endian_test
.i
= 1;
43 return big_endian_test
.c
[ 0 ] != 1;
46 static inline int convert_mlt_to_av_cs( mlt_image_format format
)
53 value
= PIX_FMT_RGB24
;
55 case mlt_image_rgb24a
:
56 value
= PIX_FMT_RGB32
;
58 case mlt_image_yuv422
:
59 value
= PIX_FMT_YUYV422
;
61 case mlt_image_yuv420p
:
62 value
= PIX_FMT_YUV420P
;
64 case mlt_image_opengl
:
66 fprintf( stderr
, "Invalid format...\n" );
73 static inline void convert_image( uint8_t *out
, uint8_t *in
, int out_fmt
, int in_fmt
, int width
, int height
)
77 avpicture_fill( &input
, in
, in_fmt
, width
, height
);
78 avpicture_fill( &output
, out
, out_fmt
, width
, height
);
80 struct SwsContext
*context
= sws_getContext( width
, height
, in_fmt
,
81 width
, height
, out_fmt
, SWS_FAST_BILINEAR
, NULL
, NULL
, NULL
);
82 sws_scale( context
, input
.data
, input
.linesize
, 0, height
,
83 output
.data
, output
.linesize
);
84 sws_freeContext( context
);
86 img_convert( &output
, out_fmt
, &input
, in_fmt
, width
, height
);
93 static int filter_get_image( mlt_frame
this, uint8_t **image
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
95 mlt_filter filter
= mlt_frame_pop_service( this );
96 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
97 int output_format
= *format
;
98 mlt_image_format forced
= mlt_properties_get_int( MLT_FILTER_PROPERTIES( filter
), "forced" );
101 // Allow this filter to force processing in a colour space other than requested
102 *format
= forced
!= 0 ? forced
: *format
;
104 error
= mlt_frame_get_image( this, image
, format
, width
, height
, 0 );
106 if ( error
== 0 && *format
!= output_format
&& *image
!= NULL
&& output_format
!= mlt_image_opengl
)
108 int in_fmt
= convert_mlt_to_av_cs( *format
);
109 int out_fmt
= convert_mlt_to_av_cs( output_format
);
110 int size
= avpicture_get_size( out_fmt
, *width
, *height
);
111 uint8_t *output
= mlt_pool_alloc( size
);
112 convert_image( output
, *image
, out_fmt
, in_fmt
, *width
, *height
);
114 // Special case for alpha rgb input
115 if ( *format
== mlt_image_rgb24a
)
117 register uint8_t *alpha
= mlt_frame_get_alpha_mask( this );
118 register int len
= *width
* *height
;
119 register uint8_t *bits
= *image
;
120 register int n
= ( len
+ 7 ) / 8;
122 if( !is_big_endian( ) )
125 // Extract alpha mask from the image using Duff's Device
128 case 0: do { *alpha
++ = *bits
; bits
+= 4;
129 case 7: *alpha
++ = *bits
; bits
+= 4;
130 case 6: *alpha
++ = *bits
; bits
+= 4;
131 case 5: *alpha
++ = *bits
; bits
+= 4;
132 case 4: *alpha
++ = *bits
; bits
+= 4;
133 case 3: *alpha
++ = *bits
; bits
+= 4;
134 case 2: *alpha
++ = *bits
; bits
+= 4;
135 case 1: *alpha
++ = *bits
; bits
+= 4;
143 *format
= output_format
;
144 mlt_properties_set_data( properties
, "image", output
, size
, mlt_pool_release
, NULL
);
145 mlt_properties_set_int( properties
, "format", output_format
);
147 // Special case for alpha rgb output
148 if ( *format
== mlt_image_rgb24a
)
151 register uint8_t *alpha
= mlt_frame_get_alpha_mask( this );
155 register uint8_t *bits
= *image
;
156 register int len
= *width
* *height
;
157 register int n
= ( len
+ 7 ) / 8;
159 if( !is_big_endian( ) )
162 // Merge the alpha mask into the RGB image using Duff's Device
165 case 0: do { *bits
= *alpha
++; bits
+= 4;
166 case 7: *bits
= *alpha
++; bits
+= 4;
167 case 6: *bits
= *alpha
++; bits
+= 4;
168 case 5: *bits
= *alpha
++; bits
+= 4;
169 case 4: *bits
= *alpha
++; bits
+= 4;
170 case 3: *bits
= *alpha
++; bits
+= 4;
171 case 2: *bits
= *alpha
++; bits
+= 4;
172 case 1: *bits
= *alpha
++; bits
+= 4;
179 else if ( error
== 0 && *format
!= output_format
&& *image
!= NULL
&& output_format
== mlt_image_opengl
)
181 if ( *format
== mlt_image_yuv422
)
183 int size
= *width
* *height
* 4;
184 uint8_t *output
= mlt_pool_alloc( size
);
187 uint8_t *o
= output
+ size
;
190 uint8_t *alpha
= mlt_frame_get_alpha_mask( this ) + *width
* *height
;
200 YUV2RGB( *p
, *( p
+ 1 ), *( p
+ 3 ), r
, g
, b
);
205 YUV2RGB( *( p
+ 2 ), *( p
+ 1 ), *( p
+ 3 ), r
, g
, b
);
217 mlt_properties_set_data( properties
, "image", output
, size
, mlt_pool_release
, NULL
);
218 mlt_properties_set_int( properties
, "format", output_format
);
220 *format
= output_format
;
227 /** Filter processing.
230 static mlt_frame
filter_process( mlt_filter
this, mlt_frame frame
)
232 mlt_frame_push_service( frame
, this );
233 mlt_frame_push_get_image( frame
, filter_get_image
);
237 /** Constructor for the filter.
240 mlt_filter
filter_avcolour_space_init( void *arg
)
242 mlt_filter
this = mlt_filter_new( );
244 this->process
= filter_process
;