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>
24 #include <framework/mlt_profile.h>
26 // ffmpeg Header files
32 #if LIBAVUTIL_VERSION_INT < (50<<16)
33 #define PIX_FMT_YUYV422 PIX_FMT_YUV422
39 #if 0 // This test might come in handy elsewhere someday.
40 static int is_big_endian( )
42 union { int i; char c[ 4 ]; } big_endian_test;
43 big_endian_test.i = 1;
45 return big_endian_test.c[ 0 ] != 1;
49 static int convert_mlt_to_av_cs( mlt_image_format format )
56 value = PIX_FMT_RGB24;
58 case mlt_image_rgb24a:
59 case mlt_image_opengl:
62 case mlt_image_yuv422:
63 value = PIX_FMT_YUYV422;
65 case mlt_image_yuv420p:
66 value = PIX_FMT_YUV420P;
69 mlt_log_error( NULL, "[filter avcolor_space] Invalid format\n" );
76 static void set_luma_transfer( struct SwsContext *context, int colorspace, int use_full_range )
80 int brightness, contrast, saturation;
82 if ( sws_getColorspaceDetails( context, &coefficients, &full_range, &coefficients, &full_range,
83 &brightness, &contrast, &saturation ) != -1 )
85 // Don't change these from defaults unless explicitly told to.
94 coefficients = sws_getCoefficients( SWS_CS_ITU601 );
97 coefficients = sws_getCoefficients( SWS_CS_SMPTE240M );
100 coefficients = sws_getCoefficients( SWS_CS_ITU709 );
103 sws_setColorspaceDetails( context, coefficients, full_range, coefficients, full_range,
104 brightness, contrast, saturation );
108 static void av_convert_image( uint8_t *out, uint8_t *in, int out_fmt, int in_fmt,
109 int width, int height, int colorspace, int use_full_range )
113 int flags = SWS_BILINEAR | SWS_ACCURATE_RND;
115 if ( out_fmt == PIX_FMT_YUYV422 )
116 flags |= SWS_FULL_CHR_H_INP;
118 flags |= SWS_FULL_CHR_H_INT;
120 flags |= SWS_CPU_CAPS_MMX;
123 flags |= SWS_CPU_CAPS_MMX2;
126 avpicture_fill( &input, in, in_fmt, width, height );
127 avpicture_fill( &output, out, out_fmt, width, height );
129 struct SwsContext *context = sws_getContext( width, height, in_fmt,
130 width, height, out_fmt, flags, NULL, NULL, NULL);
131 set_luma_transfer( context, colorspace, use_full_range );
132 sws_scale( context, input.data, input.linesize, 0, height,
133 output.data, output.linesize);
134 sws_freeContext( context );
136 img_convert( &output, out_fmt, &input, in_fmt, width, height );
143 static int convert_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, mlt_image_format output_format )
145 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
146 int width = mlt_properties_get_int( properties, "width" );
147 int height = mlt_properties_get_int( properties, "height" );
150 if ( *format != output_format )
152 mlt_log_debug( NULL, "[filter avcolor_space] %s -> %s @ %dx%d\n",
153 mlt_image_format_name( *format ), mlt_image_format_name( output_format ),
156 int in_fmt = convert_mlt_to_av_cs( *format );
157 int out_fmt = convert_mlt_to_av_cs( output_format );
158 int size = avpicture_get_size( out_fmt, width, height );
159 uint8_t *output = mlt_pool_alloc( size );
161 if ( *format == mlt_image_rgb24a || *format == mlt_image_opengl )
163 register int len = width * height;
164 uint8_t *alpha = mlt_pool_alloc( len );
168 // Extract the alpha mask from the RGBA image using Duff's Device
169 register uint8_t *s = *image + 3; // start on the alpha component
170 register uint8_t *d = alpha;
171 register int n = ( len + 7 ) / 8;
175 case 0: do { *d++ = *s; s += 4;
176 case 7: *d++ = *s; s += 4;
177 case 6: *d++ = *s; s += 4;
178 case 5: *d++ = *s; s += 4;
179 case 4: *d++ = *s; s += 4;
180 case 3: *d++ = *s; s += 4;
181 case 2: *d++ = *s; s += 4;
182 case 1: *d++ = *s; s += 4;
186 mlt_properties_set_data( properties, "alpha", alpha, len, mlt_pool_release, NULL );
187 frame->get_alpha_mask = NULL;
192 int colorspace = mlt_properties_get_int( properties, "colorspace" );
193 int force_full_luma = mlt_properties_get_int( properties, "force_full_luma" );
194 if ( *format == mlt_image_yuv422 && force_full_luma
195 && ( output_format == mlt_image_rgb24 || output_format == mlt_image_rgb24a ) )
196 mlt_properties_set( properties, "force_full_luma", NULL );
197 av_convert_image( output, *image, out_fmt, in_fmt, width, height, colorspace, force_full_luma );
199 *format = output_format;
200 mlt_properties_set_data( properties, "image", output, size, mlt_pool_release, NULL );
201 mlt_properties_set_int( properties, "format", output_format );
203 if ( output_format == mlt_image_rgb24a || output_format == mlt_image_opengl )
205 register int len = width * height;
207 uint8_t *alpha = mlt_frame_get_alpha_mask( frame );
208 mlt_properties_get_data( properties, "alpha", &alpha_size );
210 if ( alpha && alpha_size >= len )
212 // Merge the alpha mask from into the RGBA image using Duff's Device
213 register uint8_t *s = alpha;
214 register uint8_t *d = *image + 3; // start on the alpha component
215 register int n = ( len + 7 ) / 8;
219 case 0: do { *d = *s++; d += 4;
220 case 7: *d = *s++; d += 4;
221 case 6: *d = *s++; d += 4;
222 case 5: *d = *s++; d += 4;
223 case 4: *d = *s++; d += 4;
224 case 3: *d = *s++; d += 4;
225 case 2: *d = *s++; d += 4;
226 case 1: *d = *s++; d += 4;
236 static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
239 mlt_profile profile = (mlt_profile) mlt_frame_pop_get_image( frame );
240 mlt_properties properties = MLT_FRAME_PROPERTIES(frame);
241 mlt_image_format format_from = *format;
242 mlt_image_format format_to = mlt_image_rgb24;
244 error = mlt_frame_get_image( frame, image, format, width, height, writable );
246 if ( !error && *format == mlt_image_yuv422 && profile->colorspace > 0 &&
247 mlt_properties_get_int( properties, "colorspace" ) != profile->colorspace )
249 mlt_log_debug( NULL, "[filter avcolor_space] colorspace %d -> %d\n",
250 mlt_properties_get_int( properties, "colorspace" ), profile->colorspace );
252 // Convert to RGB using frame's colorspace
253 error = convert_image( frame, image, &format_from, format_to );
255 // Convert to YUV using profile's colorspace
258 *image = mlt_properties_get_data( properties, "image", NULL );
259 format_from = mlt_image_rgb24;
261 mlt_properties_set_int( properties, "colorspace", profile->colorspace );
262 error = convert_image( frame, image, &format_from, format_to );
263 *image = mlt_properties_get_data( properties, "image", NULL );
270 /** Filter processing.
273 static mlt_frame filter_process( mlt_filter filter, mlt_frame frame )
275 frame->convert_image = convert_image;
276 mlt_frame_push_service( frame, mlt_service_profile( MLT_FILTER_SERVICE( filter ) ) );
277 mlt_frame_push_get_image( frame, get_image );
281 /** Constructor for the filter.
284 mlt_filter filter_avcolour_space_init( void *arg )
287 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(7<<8)+2))
288 // Test to see if swscale accepts the arg as resolution
291 int width = (int) arg;
292 struct SwsContext *context = sws_getContext( width, width, PIX_FMT_RGB32, 64, 64, PIX_FMT_RGB32, SWS_BILINEAR, NULL, NULL, NULL);
294 sws_freeContext( context );
302 mlt_filter this = mlt_filter_new( );
304 this->process = filter_process;