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>
23 #include <framework/mlt_log.h>
25 // ffmpeg Header files
31 #if LIBAVUTIL_VERSION_INT < (50<<16)
32 #define PIX_FMT_YUYV422 PIX_FMT_YUV422
38 #if 0 // This test might come in handy elsewhere someday.
39 static int is_big_endian( )
41 union { int i; char c[ 4 ]; } big_endian_test;
42 big_endian_test.i = 1;
44 return big_endian_test.c[ 0 ] != 1;
48 static int convert_mlt_to_av_cs( mlt_image_format format )
55 value = PIX_FMT_RGB24;
57 case mlt_image_rgb24a:
58 case mlt_image_opengl:
61 case mlt_image_yuv422:
62 value = PIX_FMT_YUYV422;
64 case mlt_image_yuv420p:
65 value = PIX_FMT_YUV420P;
68 mlt_log_error( NULL, "[filter avcolor_space] Invalid format\n" );
75 static void av_convert_image( uint8_t *out, uint8_t *in, int out_fmt, int in_fmt, int width, int height )
79 int flags = SWS_BILINEAR | SWS_ACCURATE_RND;
81 if ( out_fmt == PIX_FMT_YUYV422 )
82 flags |= SWS_FULL_CHR_H_INP;
84 flags |= SWS_FULL_CHR_H_INT;
86 flags |= SWS_CPU_CAPS_MMX;
89 flags |= SWS_CPU_CAPS_MMX2;
92 avpicture_fill( &input, in, in_fmt, width, height );
93 avpicture_fill( &output, out, out_fmt, width, height );
95 struct SwsContext *context = sws_getContext( width, height, in_fmt,
96 width, height, out_fmt, flags, NULL, NULL, NULL);
97 sws_scale( context, input.data, input.linesize, 0, height,
98 output.data, output.linesize);
99 sws_freeContext( context );
101 img_convert( &output, out_fmt, &input, in_fmt, width, height );
108 static int convert_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, mlt_image_format output_format )
110 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
111 int width = mlt_properties_get_int( properties, "width" );
112 int height = mlt_properties_get_int( properties, "height" );
115 if ( *format != output_format )
117 mlt_log_debug( NULL, "[filter avcolor_space] %s -> %s\n",
118 mlt_image_format_name( *format ), mlt_image_format_name( output_format ) );
120 int in_fmt = convert_mlt_to_av_cs( *format );
121 int out_fmt = convert_mlt_to_av_cs( output_format );
122 int size = avpicture_get_size( out_fmt, width, height );
123 uint8_t *output = mlt_pool_alloc( size );
125 if ( *format == mlt_image_rgb24a || *format == mlt_image_opengl )
127 register int len = width * height;
128 uint8_t *alpha = mlt_pool_alloc( len );
132 // Extract the alpha mask from the RGBA image using Duff's Device
133 register uint8_t *s = *image + 3; // start on the alpha component
134 register uint8_t *d = alpha;
135 register int n = ( len + 7 ) / 8;
139 case 0: do { *d++ = *s; s += 4;
140 case 7: *d++ = *s; s += 4;
141 case 6: *d++ = *s; s += 4;
142 case 5: *d++ = *s; s += 4;
143 case 4: *d++ = *s; s += 4;
144 case 3: *d++ = *s; s += 4;
145 case 2: *d++ = *s; s += 4;
146 case 1: *d++ = *s; s += 4;
150 mlt_properties_set_data( properties, "alpha", alpha, len, mlt_pool_release, NULL );
151 frame->get_alpha_mask = NULL;
156 av_convert_image( output, *image, out_fmt, in_fmt, width, height );
158 *format = output_format;
159 mlt_properties_set_data( properties, "image", output, size, mlt_pool_release, NULL );
160 mlt_properties_set_int( properties, "format", output_format );
165 /** Filter processing.
168 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
170 frame->convert_image = convert_image;
174 /** Constructor for the filter.
177 mlt_filter filter_avcolour_space_init( void *arg )
179 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(7<<8)+2))
180 // Test to see if swscale accepts the arg as resolution
183 int width = (int) arg;
184 struct SwsContext *context = sws_getContext( width, width, PIX_FMT_RGB32, 64, 64, PIX_FMT_RGB32, SWS_BILINEAR, NULL, NULL, NULL);
186 sws_freeContext( context );
191 mlt_filter this = mlt_filter_new( );
193 this->process = filter_process;