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 case mlt_image_rgb24_full:
56 value = PIX_FMT_RGB24;
58 case mlt_image_rgb24a:
59 case mlt_image_opengl:
60 case mlt_image_rgb24a_full:
63 case mlt_image_yuv422:
64 case mlt_image_yuv422_709:
65 value = PIX_FMT_YUYV422;
67 case mlt_image_yuv420p:
68 value = PIX_FMT_YUV420P;
71 mlt_log_error( NULL, "[filter avcolor_space] Invalid format\n" );
78 static void set_luma_transfer( struct SwsContext *context, int is_709, int no_scale )
82 int brightness, contrast, saturation;
84 if ( sws_getColorspaceDetails( context, &coefficients, &range, &coefficients, &range,
85 &brightness, &contrast, &saturation ) != -1 )
87 // Don't change these from defaults unless explicitly told to.
91 coefficients = sws_getCoefficients( SWS_CS_ITU709 );
92 sws_setColorspaceDetails( context, coefficients, range, coefficients, range,
93 brightness, contrast, saturation );
97 static void av_convert_image( uint8_t *out, uint8_t *in, int out_fmt, int in_fmt,
98 int width, int height, int is_709, int no_scale )
102 int flags = SWS_BILINEAR | SWS_ACCURATE_RND;
104 if ( out_fmt == PIX_FMT_YUYV422 )
105 flags |= SWS_FULL_CHR_H_INP;
107 flags |= SWS_FULL_CHR_H_INT;
109 flags |= SWS_CPU_CAPS_MMX;
112 flags |= SWS_CPU_CAPS_MMX2;
115 avpicture_fill( &input, in, in_fmt, width, height );
116 avpicture_fill( &output, out, out_fmt, width, height );
118 struct SwsContext *context = sws_getContext( width, height, in_fmt,
119 width, height, out_fmt, flags, NULL, NULL, NULL);
120 set_luma_transfer( context, is_709, no_scale );
121 sws_scale( context, input.data, input.linesize, 0, height,
122 output.data, output.linesize);
123 sws_freeContext( context );
125 img_convert( &output, out_fmt, &input, in_fmt, width, height );
132 static int convert_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, mlt_image_format output_format )
134 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
135 int width = mlt_properties_get_int( properties, "width" );
136 int height = mlt_properties_get_int( properties, "height" );
139 if ( *format != output_format )
141 mlt_log_debug( NULL, "[filter avcolor_space] %s -> %s @ %dx%d\n",
142 mlt_image_format_name( *format ), mlt_image_format_name( output_format ),
145 int in_fmt = convert_mlt_to_av_cs( *format );
146 int out_fmt = convert_mlt_to_av_cs( output_format );
147 int size = avpicture_get_size( out_fmt, width, height );
148 uint8_t *output = mlt_pool_alloc( size );
150 if ( *format == mlt_image_rgb24a || *format == mlt_image_opengl )
152 register int len = width * height;
153 uint8_t *alpha = mlt_pool_alloc( len );
157 // Extract the alpha mask from the RGBA image using Duff's Device
158 register uint8_t *s = *image + 3; // start on the alpha component
159 register uint8_t *d = alpha;
160 register int n = ( len + 7 ) / 8;
164 case 0: do { *d++ = *s; s += 4;
165 case 7: *d++ = *s; s += 4;
166 case 6: *d++ = *s; s += 4;
167 case 5: *d++ = *s; s += 4;
168 case 4: *d++ = *s; s += 4;
169 case 3: *d++ = *s; s += 4;
170 case 2: *d++ = *s; s += 4;
171 case 1: *d++ = *s; s += 4;
175 mlt_properties_set_data( properties, "alpha", alpha, len, mlt_pool_release, NULL );
176 frame->get_alpha_mask = NULL;
181 int is_709 = output_format == mlt_image_yuv422 && width * height > 750000;
182 int no_scale_luma = 0;
183 if ( *format == mlt_image_yuv422 && mlt_properties_get_int( properties, "skip_luma_scale" )
184 && ( output_format == mlt_image_rgb24 || output_format == mlt_image_rgb24a ) )
187 mlt_properties_set( properties, "skip_luma_scale", NULL );
189 av_convert_image( output, *image, out_fmt, in_fmt, width, height, is_709, no_scale_luma );
191 *format = output_format;
192 mlt_properties_set_data( properties, "image", output, size, mlt_pool_release, NULL );
193 mlt_properties_set_int( properties, "format", output_format );
195 if ( output_format == mlt_image_rgb24a || output_format == mlt_image_opengl )
197 register int len = width * height;
199 uint8_t *alpha = mlt_frame_get_alpha_mask( frame );
200 mlt_properties_get_data( properties, "alpha", &alpha_size );
202 if ( alpha && alpha_size >= len )
204 // Merge the alpha mask from into the RGBA image using Duff's Device
205 register uint8_t *s = alpha;
206 register uint8_t *d = *image + 3; // start on the alpha component
207 register int n = ( len + 7 ) / 8;
211 case 0: do { *d = *s++; d += 4;
212 case 7: *d = *s++; d += 4;
213 case 6: *d = *s++; d += 4;
214 case 5: *d = *s++; d += 4;
215 case 4: *d = *s++; d += 4;
216 case 3: *d = *s++; d += 4;
217 case 2: *d = *s++; d += 4;
218 case 1: *d = *s++; d += 4;
228 /** Filter processing.
231 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
233 frame->convert_image = convert_image;
237 /** Constructor for the filter.
240 mlt_filter filter_avcolour_space_init( void *arg )
243 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(7<<8)+2))
244 // Test to see if swscale accepts the arg as resolution
247 int width = (int) arg;
248 struct SwsContext *context = sws_getContext( width, width, PIX_FMT_RGB32, 64, 64, PIX_FMT_RGB32, SWS_BILINEAR, NULL, NULL, NULL);
250 sws_freeContext( context );
258 mlt_filter this = mlt_filter_new( );
260 this->process = filter_process;