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 set_luma_transfer( struct SwsContext *context, int is_709, int no_scale )
79 int brightness, contrast, saturation;
81 if ( sws_getColorspaceDetails( context, &coefficients, &range, &coefficients, &range,
82 &brightness, &contrast, &saturation ) != -1 )
84 // Don't change these from defaults unless explicitly told to.
88 coefficients = sws_getCoefficients( SWS_CS_ITU709 );
89 sws_setColorspaceDetails( context, coefficients, range, coefficients, range,
90 brightness, contrast, saturation );
94 static void av_convert_image( uint8_t *out, uint8_t *in, int out_fmt, int in_fmt,
95 int width, int height, int is_709, int no_scale )
99 int flags = SWS_BILINEAR | SWS_ACCURATE_RND;
101 if ( out_fmt == PIX_FMT_YUYV422 )
102 flags |= SWS_FULL_CHR_H_INP;
104 flags |= SWS_FULL_CHR_H_INT;
106 flags |= SWS_CPU_CAPS_MMX;
109 flags |= SWS_CPU_CAPS_MMX2;
112 avpicture_fill( &input, in, in_fmt, width, height );
113 avpicture_fill( &output, out, out_fmt, width, height );
115 struct SwsContext *context = sws_getContext( width, height, in_fmt,
116 width, height, out_fmt, flags, NULL, NULL, NULL);
117 set_luma_transfer( context, is_709, no_scale );
118 sws_scale( context, input.data, input.linesize, 0, height,
119 output.data, output.linesize);
120 sws_freeContext( context );
122 img_convert( &output, out_fmt, &input, in_fmt, width, height );
129 static int convert_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, mlt_image_format output_format )
131 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
132 int width = mlt_properties_get_int( properties, "width" );
133 int height = mlt_properties_get_int( properties, "height" );
136 if ( *format != output_format )
138 mlt_log_debug( NULL, "[filter avcolor_space] %s -> %s @ %dx%d\n",
139 mlt_image_format_name( *format ), mlt_image_format_name( output_format ),
142 int in_fmt = convert_mlt_to_av_cs( *format );
143 int out_fmt = convert_mlt_to_av_cs( output_format );
144 int size = avpicture_get_size( out_fmt, width, height );
145 uint8_t *output = mlt_pool_alloc( size );
147 if ( *format == mlt_image_rgb24a || *format == mlt_image_opengl )
149 register int len = width * height;
150 uint8_t *alpha = mlt_pool_alloc( len );
154 // Extract the alpha mask from the RGBA image using Duff's Device
155 register uint8_t *s = *image + 3; // start on the alpha component
156 register uint8_t *d = alpha;
157 register int n = ( len + 7 ) / 8;
161 case 0: do { *d++ = *s; s += 4;
162 case 7: *d++ = *s; s += 4;
163 case 6: *d++ = *s; s += 4;
164 case 5: *d++ = *s; s += 4;
165 case 4: *d++ = *s; s += 4;
166 case 3: *d++ = *s; s += 4;
167 case 2: *d++ = *s; s += 4;
168 case 1: *d++ = *s; s += 4;
172 mlt_properties_set_data( properties, "alpha", alpha, len, mlt_pool_release, NULL );
173 frame->get_alpha_mask = NULL;
178 int is_709 = output_format == mlt_image_yuv422 && width * height > 750000;
179 int no_scale_luma = 0;
180 if ( *format == mlt_image_yuv422 && mlt_properties_get_int( properties, "skip_luma_scale" )
181 && ( output_format == mlt_image_rgb24 || output_format == mlt_image_rgb24a ) )
184 mlt_properties_set( properties, "skip_luma_scale", NULL );
186 av_convert_image( output, *image, out_fmt, in_fmt, width, height, is_709, no_scale_luma );
188 *format = output_format;
189 mlt_properties_set_data( properties, "image", output, size, mlt_pool_release, NULL );
190 mlt_properties_set_int( properties, "format", output_format );
192 if ( output_format == mlt_image_rgb24a || output_format == mlt_image_opengl )
194 register int len = width * height;
196 uint8_t *alpha = mlt_frame_get_alpha_mask( frame );
197 mlt_properties_get_data( properties, "alpha", &alpha_size );
199 if ( alpha && alpha_size >= len )
201 // Merge the alpha mask from into the RGBA image using Duff's Device
202 register uint8_t *s = alpha;
203 register uint8_t *d = *image + 3; // start on the alpha component
204 register int n = ( len + 7 ) / 8;
208 case 0: do { *d = *s++; d += 4;
209 case 7: *d = *s++; d += 4;
210 case 6: *d = *s++; d += 4;
211 case 5: *d = *s++; d += 4;
212 case 4: *d = *s++; d += 4;
213 case 3: *d = *s++; d += 4;
214 case 2: *d = *s++; d += 4;
215 case 1: *d = *s++; d += 4;
225 /** Filter processing.
228 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
230 frame->convert_image = convert_image;
234 /** Constructor for the filter.
237 mlt_filter filter_avcolour_space_init( void *arg )
240 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(7<<8)+2))
241 // Test to see if swscale accepts the arg as resolution
244 int width = (int) arg;
245 struct SwsContext *context = sws_getContext( width, width, PIX_FMT_RGB32, 64, 64, PIX_FMT_RGB32, SWS_BILINEAR, NULL, NULL, NULL);
247 sws_freeContext( context );
255 mlt_filter this = mlt_filter_new( );
257 this->process = filter_process;