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;