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 = 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 sws_setColorspaceDetails( context, new_coefficients, full_range, new_coefficients, full_range,
106 brightness, contrast, saturation );
111 static void av_convert_image( uint8_t *out, uint8_t *in, int out_fmt, int in_fmt,
112 int width, int height, int colorspace, int use_full_range )
117 int flags = SWS_BILINEAR | SWS_ACCURATE_RND;
119 if ( out_fmt == PIX_FMT_YUYV422 )
120 flags |= SWS_FULL_CHR_H_INP;
122 flags |= SWS_FULL_CHR_H_INT;
124 flags |= SWS_CPU_CAPS_MMX;
127 flags |= SWS_CPU_CAPS_MMX2;
131 avpicture_fill( &input, in, in_fmt, width, height );
132 avpicture_fill( &output, out, out_fmt, width, height );
134 struct SwsContext *context = sws_getContext( width, height, in_fmt,
135 width, height, out_fmt, flags, NULL, NULL, NULL);
136 set_luma_transfer( context, colorspace, use_full_range );
137 sws_scale( context, (const uint8_t* const*) input.data, input.linesize, 0, height,
138 output.data, output.linesize);
139 sws_freeContext( context );
141 img_convert( &output, out_fmt, &input, in_fmt, width, height );
148 static int convert_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, mlt_image_format output_format )
150 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
151 int width = mlt_properties_get_int( properties, "width" );
152 int height = mlt_properties_get_int( properties, "height" );
155 if ( *format != output_format )
157 int colorspace = mlt_properties_get_int( properties, "colorspace" );
158 int force_full_luma = -1;
160 mlt_log_debug( NULL, "[filter avcolor_space] %s -> %s @ %dx%d space %d\n",
161 mlt_image_format_name( *format ), mlt_image_format_name( output_format ),
162 width, height, colorspace );
164 int in_fmt = convert_mlt_to_av_cs( *format );
165 int out_fmt = convert_mlt_to_av_cs( output_format );
166 int size = avpicture_get_size( out_fmt, width, height );
167 uint8_t *output = mlt_pool_alloc( size );
169 if ( *format == mlt_image_rgb24a || *format == mlt_image_opengl )
171 register int len = width * height;
172 uint8_t *alpha = mlt_pool_alloc( len );
176 // Extract the alpha mask from the RGBA image using Duff's Device
177 register uint8_t *s = *image + 3; // start on the alpha component
178 register uint8_t *d = alpha;
179 register int n = ( len + 7 ) / 8;
183 case 0: do { *d++ = *s; s += 4;
184 case 7: *d++ = *s; s += 4;
185 case 6: *d++ = *s; s += 4;
186 case 5: *d++ = *s; s += 4;
187 case 4: *d++ = *s; s += 4;
188 case 3: *d++ = *s; s += 4;
189 case 2: *d++ = *s; s += 4;
190 case 1: *d++ = *s; s += 4;
194 mlt_frame_set_alpha( frame, alpha, len, mlt_pool_release );
195 frame->get_alpha_mask = NULL;
200 if ( *format == mlt_image_yuv422 && mlt_properties_get( properties, "force_full_luma" )
201 && ( output_format == mlt_image_rgb24 || output_format == mlt_image_rgb24a ) )
203 // By removing the frame property we only permit the luma to skip scaling once.
204 // Thereafter, we let swscale scale the luma range as it pleases since it seems
205 // we do not have control over the RGB to YUV conversion.
206 force_full_luma = mlt_properties_get_int( properties, "force_full_luma" );
207 mlt_properties_set( properties, "force_full_luma", NULL );
209 av_convert_image( output, *image, out_fmt, in_fmt, width, height, colorspace, force_full_luma );
211 *format = output_format;
212 mlt_frame_set_image( frame, output, size, mlt_pool_release );
213 mlt_properties_set_int( properties, "format", output_format );
215 if ( output_format == mlt_image_rgb24a || output_format == mlt_image_opengl )
217 register int len = width * height;
219 uint8_t *alpha = mlt_frame_get_alpha_mask( frame );
220 mlt_properties_get_data( properties, "alpha", &alpha_size );
222 if ( alpha && alpha_size >= len )
224 // Merge the alpha mask from into the RGBA image using Duff's Device
225 register uint8_t *s = alpha;
226 register uint8_t *d = *image + 3; // start on the alpha component
227 register int n = ( len + 7 ) / 8;
231 case 0: do { *d = *s++; d += 4;
232 case 7: *d = *s++; d += 4;
233 case 6: *d = *s++; d += 4;
234 case 5: *d = *s++; d += 4;
235 case 4: *d = *s++; d += 4;
236 case 3: *d = *s++; d += 4;
237 case 2: *d = *s++; d += 4;
238 case 1: *d = *s++; d += 4;
248 /* TODO: The below is not working because swscale does not have
249 * adjustable coefficients yet for RGB->YUV */
251 static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
254 mlt_profile profile = (mlt_profile) mlt_frame_pop_get_image( frame );
255 mlt_properties properties = MLT_FRAME_PROPERTIES(frame);
256 mlt_image_format format_from = *format;
257 mlt_image_format format_to = mlt_image_rgb24;
259 error = mlt_frame_get_image( frame, image, format, width, height, writable );
261 int frame_colorspace = mlt_properties_get_int( properties, "colorspace" );
263 if ( !error && *format == mlt_image_yuv422 && profile->colorspace > 0 &&
264 frame_colorspace > 0 && frame_colorspace != profile->colorspace )
266 mlt_log_debug( NULL, "[filter avcolor_space] colorspace %d -> %d\n",
267 frame_colorspace, profile->colorspace );
269 // Convert to RGB using frame's colorspace
270 error = convert_image( frame, image, &format_from, format_to );
272 // Convert to YUV using profile's colorspace
275 *image = mlt_properties_get_data( properties, "image", NULL );
276 format_from = mlt_image_rgb24;
278 mlt_properties_set_int( properties, "colorspace", profile->colorspace );
279 error = convert_image( frame, image, &format_from, format_to );
280 *image = mlt_properties_get_data( properties, "image", NULL );
288 /** Filter processing.
291 static mlt_frame filter_process( mlt_filter filter, mlt_frame frame )
293 // Set a default colorspace on the frame if not yet set by the producer.
294 // The producer may still change it during get_image.
295 // This way we do not have to modify each producer to set a valid colorspace.
296 mlt_properties properties = MLT_FRAME_PROPERTIES(frame);
297 if ( mlt_properties_get_int( properties, "colorspace" ) <= 0 )
298 mlt_properties_set_int( properties, "colorspace", mlt_service_profile( MLT_FILTER_SERVICE(filter) )->colorspace );
300 frame->convert_image = convert_image;
302 // Not working yet - see comment for get_image() above.
303 // mlt_frame_push_service( frame, mlt_service_profile( MLT_FILTER_SERVICE( filter ) ) );
304 // mlt_frame_push_get_image( frame, get_image );
309 /** Constructor for the filter.
312 mlt_filter filter_avcolour_space_init( void *arg )
315 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(7<<8)+2))
316 // Test to see if swscale accepts the arg as resolution
319 int width = (int) arg;
320 struct SwsContext *context = sws_getContext( width, width, PIX_FMT_RGB32, 64, 64, PIX_FMT_RGB32, SWS_BILINEAR, NULL, NULL, NULL);
322 sws_freeContext( context );
330 mlt_filter filter = mlt_filter_new( );
331 if ( filter != NULL )
332 filter->process = filter_process;