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;