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
27 #include <libavformat/avformat.h>
29 #include <libswscale/swscale.h>
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 )
78 #if defined(SWSCALE) && (LIBSWSCALE_VERSION_INT >= ((0<<16)+(7<<8)+2))
80 const int *new_coefficients;
82 int brightness, contrast, saturation;
84 if ( sws_getColorspaceDetails( context, &coefficients, &full_range, &coefficients, &full_range,
85 &brightness, &contrast, &saturation ) != -1 )
87 // Don't change these from defaults unless explicitly told to.
88 if ( use_full_range >= 0 )
89 full_range = use_full_range;
96 new_coefficients = sws_getCoefficients( SWS_CS_ITU601 );
99 new_coefficients = sws_getCoefficients( SWS_CS_SMPTE240M );
102 new_coefficients = sws_getCoefficients( SWS_CS_ITU709 );
105 new_coefficients = coefficients;
108 sws_setColorspaceDetails( context, new_coefficients, full_range, new_coefficients, full_range,
109 brightness, contrast, saturation );
114 static void av_convert_image( uint8_t *out, uint8_t *in, int out_fmt, int in_fmt,
115 int width, int height, int colorspace, int use_full_range )
120 int flags = SWS_BILINEAR | SWS_ACCURATE_RND;
122 if ( out_fmt == PIX_FMT_YUYV422 )
123 flags |= SWS_FULL_CHR_H_INP;
125 flags |= SWS_FULL_CHR_H_INT;
127 flags |= SWS_CPU_CAPS_MMX;
130 flags |= SWS_CPU_CAPS_MMX2;
134 avpicture_fill( &input, in, in_fmt, width, height );
135 avpicture_fill( &output, out, out_fmt, width, height );
137 struct SwsContext *context = sws_getContext( width, height, in_fmt,
138 width, height, out_fmt, flags, NULL, NULL, NULL);
139 set_luma_transfer( context, colorspace, use_full_range );
140 sws_scale( context, (const uint8_t* const*) input.data, input.linesize, 0, height,
141 output.data, output.linesize);
142 sws_freeContext( context );
144 img_convert( &output, out_fmt, &input, in_fmt, width, height );
151 static int convert_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, mlt_image_format output_format )
153 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
154 int width = mlt_properties_get_int( properties, "width" );
155 int height = mlt_properties_get_int( properties, "height" );
158 if ( *format != output_format )
160 int colorspace = mlt_properties_get_int( properties, "colorspace" );
161 int force_full_luma = -1;
163 mlt_log_debug( NULL, "[filter avcolor_space] %s -> %s @ %dx%d space %d\n",
164 mlt_image_format_name( *format ), mlt_image_format_name( output_format ),
165 width, height, colorspace );
167 int in_fmt = convert_mlt_to_av_cs( *format );
168 int out_fmt = convert_mlt_to_av_cs( output_format );
169 int size = avpicture_get_size( out_fmt, width, height );
170 uint8_t *output = mlt_pool_alloc( size );
172 if ( *format == mlt_image_rgb24a || *format == mlt_image_opengl )
174 register int len = width * height;
175 uint8_t *alpha = mlt_pool_alloc( len );
179 // Extract the alpha mask from the RGBA image using Duff's Device
180 register uint8_t *s = *image + 3; // start on the alpha component
181 register uint8_t *d = alpha;
182 register int n = ( len + 7 ) / 8;
186 case 0: do { *d++ = *s; s += 4;
187 case 7: *d++ = *s; s += 4;
188 case 6: *d++ = *s; s += 4;
189 case 5: *d++ = *s; s += 4;
190 case 4: *d++ = *s; s += 4;
191 case 3: *d++ = *s; s += 4;
192 case 2: *d++ = *s; s += 4;
193 case 1: *d++ = *s; s += 4;
197 mlt_frame_set_alpha( frame, alpha, len, mlt_pool_release );
198 frame->get_alpha_mask = NULL;
203 if ( *format == mlt_image_yuv422 && mlt_properties_get( properties, "force_full_luma" )
204 && ( output_format == mlt_image_rgb24 || output_format == mlt_image_rgb24a ) )
206 // By removing the frame property we only permit the luma to skip scaling once.
207 // Thereafter, we let swscale scale the luma range as it pleases since it seems
208 // we do not have control over the RGB to YUV conversion.
209 force_full_luma = mlt_properties_get_int( properties, "force_full_luma" );
210 mlt_properties_set( properties, "force_full_luma", NULL );
212 av_convert_image( output, *image, out_fmt, in_fmt, width, height, colorspace, force_full_luma );
214 *format = output_format;
215 mlt_frame_set_image( frame, output, size, mlt_pool_release );
216 mlt_properties_set_int( properties, "format", output_format );
218 if ( output_format == mlt_image_rgb24a || output_format == mlt_image_opengl )
220 register int len = width * height;
222 uint8_t *alpha = mlt_frame_get_alpha_mask( frame );
223 mlt_properties_get_data( properties, "alpha", &alpha_size );
225 if ( alpha && alpha_size >= len )
227 // Merge the alpha mask from into the RGBA image using Duff's Device
228 register uint8_t *s = alpha;
229 register uint8_t *d = *image + 3; // start on the alpha component
230 register int n = ( len + 7 ) / 8;
234 case 0: do { *d = *s++; d += 4;
235 case 7: *d = *s++; d += 4;
236 case 6: *d = *s++; d += 4;
237 case 5: *d = *s++; d += 4;
238 case 4: *d = *s++; d += 4;
239 case 3: *d = *s++; d += 4;
240 case 2: *d = *s++; d += 4;
241 case 1: *d = *s++; d += 4;
251 /* TODO: The below is not working because swscale does not have
252 * adjustable coefficients yet for RGB->YUV */
254 static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
257 mlt_profile profile = (mlt_profile) mlt_frame_pop_get_image( frame );
258 mlt_properties properties = MLT_FRAME_PROPERTIES(frame);
259 mlt_image_format format_from = *format;
260 mlt_image_format format_to = mlt_image_rgb24;
262 error = mlt_frame_get_image( frame, image, format, width, height, writable );
264 int frame_colorspace = mlt_properties_get_int( properties, "colorspace" );
266 if ( !error && *format == mlt_image_yuv422 && profile->colorspace > 0 &&
267 frame_colorspace > 0 && frame_colorspace != profile->colorspace )
269 mlt_log_debug( NULL, "[filter avcolor_space] colorspace %d -> %d\n",
270 frame_colorspace, profile->colorspace );
272 // Convert to RGB using frame's colorspace
273 error = convert_image( frame, image, &format_from, format_to );
275 // Convert to YUV using profile's colorspace
278 *image = mlt_properties_get_data( properties, "image", NULL );
279 format_from = mlt_image_rgb24;
281 mlt_properties_set_int( properties, "colorspace", profile->colorspace );
282 error = convert_image( frame, image, &format_from, format_to );
283 *image = mlt_properties_get_data( properties, "image", NULL );
291 /** Filter processing.
294 static mlt_frame filter_process( mlt_filter filter, mlt_frame frame )
296 // Set a default colorspace on the frame if not yet set by the producer.
297 // The producer may still change it during get_image.
298 // This way we do not have to modify each producer to set a valid colorspace.
299 mlt_properties properties = MLT_FRAME_PROPERTIES(frame);
300 if ( mlt_properties_get_int( properties, "colorspace" ) <= 0 )
301 mlt_properties_set_int( properties, "colorspace", mlt_service_profile( MLT_FILTER_SERVICE(filter) )->colorspace );
303 frame->convert_image = convert_image;
305 // Not working yet - see comment for get_image() above.
306 // mlt_frame_push_service( frame, mlt_service_profile( MLT_FILTER_SERVICE( filter ) ) );
307 // mlt_frame_push_get_image( frame, get_image );
312 /** Constructor for the filter.
315 mlt_filter filter_avcolour_space_init( void *arg )
318 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(7<<8)+2))
319 // Test to see if swscale accepts the arg as resolution
322 int width = (int) arg;
323 struct SwsContext *context = sws_getContext( width, width, PIX_FMT_RGB32, 64, 64, PIX_FMT_RGB32, SWS_BILINEAR, NULL, NULL, NULL);
325 sws_freeContext( context );
333 mlt_filter filter = mlt_filter_new( );
334 if ( filter != NULL )
335 filter->process = filter_process;