2 * filter_avcolour_space.c -- Colour space filter
3 * Copyright (C) 2004-2014 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>
25 #include <framework/mlt_producer.h>
27 // ffmpeg Header files
28 #include <libavformat/avformat.h>
29 #include <libswscale/swscale.h>
34 #if 0 // This test might come in handy elsewhere someday.
35 static int is_big_endian( )
37 union { int i; char c[ 4 ]; } big_endian_test;
38 big_endian_test.i = 1;
40 return big_endian_test.c[ 0 ] != 1;
44 static int convert_mlt_to_av_cs( mlt_image_format format )
51 value = PIX_FMT_RGB24;
53 case mlt_image_rgb24a:
54 case mlt_image_opengl:
57 case mlt_image_yuv422:
58 value = PIX_FMT_YUYV422;
60 case mlt_image_yuv420p:
61 value = PIX_FMT_YUV420P;
64 mlt_log_error( NULL, "[filter avcolor_space] Invalid format %s\n",
65 mlt_image_format_name( format ) );
72 static int set_luma_transfer( struct SwsContext *context, int src_colorspace, int dst_colorspace, int full_range )
74 const int *src_coefficients = sws_getCoefficients( SWS_CS_DEFAULT );
75 const int *dst_coefficients = sws_getCoefficients( SWS_CS_DEFAULT );
77 int contrast = 1 << 16;
78 int saturation = 1 << 16;
80 switch ( src_colorspace )
86 src_coefficients = sws_getCoefficients( SWS_CS_ITU601 );
89 src_coefficients = sws_getCoefficients( SWS_CS_SMPTE240M );
92 src_coefficients = sws_getCoefficients( SWS_CS_ITU709 );
97 switch ( dst_colorspace )
103 src_coefficients = sws_getCoefficients( SWS_CS_ITU601 );
106 src_coefficients = sws_getCoefficients( SWS_CS_SMPTE240M );
109 src_coefficients = sws_getCoefficients( SWS_CS_ITU709 );
114 return sws_setColorspaceDetails( context, src_coefficients, full_range, dst_coefficients, full_range,
115 brightness, contrast, saturation );
118 // returns set_lumage_transfer result
119 static int av_convert_image( uint8_t *out, uint8_t *in, int out_fmt, int in_fmt,
120 int width, int height, int src_colorspace, int dst_colorspace, int use_full_range )
124 int flags = SWS_BICUBIC | SWS_ACCURATE_RND;
127 if ( out_fmt == PIX_FMT_YUYV422 )
128 flags |= SWS_FULL_CHR_H_INP;
130 flags |= SWS_FULL_CHR_H_INT;
132 flags |= SWS_CPU_CAPS_MMX;
135 flags |= SWS_CPU_CAPS_MMX2;
137 if ( out_fmt == PIX_FMT_YUV420P && use_full_range )
138 out_fmt = PIX_FMT_YUVJ420P;
140 avpicture_fill( &input, in, in_fmt, width, height );
141 avpicture_fill( &output, out, out_fmt, width, height );
142 struct SwsContext *context = sws_getContext( width, height, in_fmt,
143 width, height, out_fmt, flags, NULL, NULL, NULL);
146 // libswscale wants the RGB colorspace to be SWS_CS_DEFAULT, which is = SWS_CS_ITU601.
147 if ( out_fmt == PIX_FMT_RGB24 || out_fmt == PIX_FMT_RGBA )
148 dst_colorspace = 601;
149 error = set_luma_transfer( context, src_colorspace, dst_colorspace, use_full_range );
150 sws_scale( context, (const uint8_t* const*) input.data, input.linesize, 0, height,
151 output.data, output.linesize);
152 sws_freeContext( context );
160 static int convert_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, mlt_image_format output_format )
162 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
163 int width = mlt_properties_get_int( properties, "width" );
164 int height = mlt_properties_get_int( properties, "height" );
167 if ( *format != output_format )
169 mlt_profile profile = mlt_service_profile(
170 MLT_PRODUCER_SERVICE( mlt_frame_get_original_producer( frame ) ) );
171 int colorspace = mlt_properties_get_int( properties, "colorspace" );
172 int force_full_luma = 0;
174 mlt_log_debug( NULL, "[filter avcolor_space] %s -> %s @ %dx%d space %d->%d\n",
175 mlt_image_format_name( *format ), mlt_image_format_name( output_format ),
176 width, height, colorspace, profile->colorspace );
178 int in_fmt = convert_mlt_to_av_cs( *format );
179 int out_fmt = convert_mlt_to_av_cs( output_format );
180 int size = FFMAX( avpicture_get_size( out_fmt, width, height ),
181 mlt_image_format_size( output_format, width, height, NULL ) );
182 uint8_t *output = mlt_pool_alloc( size );
184 if ( *format == mlt_image_rgb24a || *format == mlt_image_opengl )
186 register int len = width * height;
187 uint8_t *alpha = mlt_pool_alloc( len );
191 // Extract the alpha mask from the RGBA image using Duff's Device
192 register uint8_t *s = *image + 3; // start on the alpha component
193 register uint8_t *d = alpha;
194 register int n = ( len + 7 ) / 8;
198 case 0: do { *d++ = *s; s += 4;
199 case 7: *d++ = *s; s += 4;
200 case 6: *d++ = *s; s += 4;
201 case 5: *d++ = *s; s += 4;
202 case 4: *d++ = *s; s += 4;
203 case 3: *d++ = *s; s += 4;
204 case 2: *d++ = *s; s += 4;
205 case 1: *d++ = *s; s += 4;
209 mlt_frame_set_alpha( frame, alpha, len, mlt_pool_release );
214 if ( *format == mlt_image_yuv422 && mlt_properties_get( properties, "force_full_luma" )
215 && ( output_format == mlt_image_rgb24 || output_format == mlt_image_rgb24a ) )
217 // By removing the frame property we only permit the luma to skip scaling once.
218 // Thereafter, we let swscale scale the luma range as it pleases since it seems
219 // we do not have control over the RGB to YUV conversion.
220 force_full_luma = mlt_properties_get_int( properties, "force_full_luma" );
221 mlt_properties_set( properties, "force_full_luma", NULL );
223 if ( !av_convert_image( output, *image, out_fmt, in_fmt, width, height,
224 colorspace, profile->colorspace, force_full_luma ) )
226 // The new colorspace is only valid if destination is YUV.
227 if ( output_format == mlt_image_yuv422 || output_format == mlt_image_yuv420p )
228 mlt_properties_set_int( properties, "colorspace", profile->colorspace );
231 *format = output_format;
232 mlt_frame_set_image( frame, output, size, mlt_pool_release );
233 mlt_properties_set_int( properties, "format", output_format );
235 if ( output_format == mlt_image_rgb24a || output_format == mlt_image_opengl )
237 register int len = width * height;
239 uint8_t *alpha = mlt_frame_get_alpha_mask( frame );
240 mlt_properties_get_data( properties, "alpha", &alpha_size );
242 if ( alpha && alpha_size >= len )
244 // Merge the alpha mask from into the RGBA image using Duff's Device
245 register uint8_t *s = alpha;
246 register uint8_t *d = *image + 3; // start on the alpha component
247 register int n = ( len + 7 ) / 8;
251 case 0: do { *d = *s++; d += 4;
252 case 7: *d = *s++; d += 4;
253 case 6: *d = *s++; d += 4;
254 case 5: *d = *s++; d += 4;
255 case 4: *d = *s++; d += 4;
256 case 3: *d = *s++; d += 4;
257 case 2: *d = *s++; d += 4;
258 case 1: *d = *s++; d += 4;
268 /* TODO: Enable this to force colorspace conversion. Cost is heavy due to RGB conversions. */
270 static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
273 mlt_profile profile = (mlt_profile) mlt_frame_pop_get_image( frame );
274 mlt_properties properties = MLT_FRAME_PROPERTIES(frame);
275 mlt_image_format format_from = *format;
276 mlt_image_format format_to = mlt_image_rgb24;
278 error = mlt_frame_get_image( frame, image, format, width, height, writable );
280 int frame_colorspace = mlt_properties_get_int( properties, "colorspace" );
282 if ( !error && *format == mlt_image_yuv422 && profile->colorspace > 0 &&
283 frame_colorspace > 0 && frame_colorspace != profile->colorspace )
285 mlt_log_debug( NULL, "[filter avcolor_space] colorspace %d -> %d\n",
286 frame_colorspace, profile->colorspace );
288 // Convert to RGB using frame's colorspace
289 error = convert_image( frame, image, &format_from, format_to );
291 // Convert to YUV using profile's colorspace
294 *image = mlt_properties_get_data( properties, "image", NULL );
295 format_from = mlt_image_rgb24;
297 mlt_properties_set_int( properties, "colorspace", profile->colorspace );
298 error = convert_image( frame, image, &format_from, format_to );
299 *image = mlt_properties_get_data( properties, "image", NULL );
307 /** Filter processing.
310 static mlt_frame filter_process( mlt_filter filter, mlt_frame frame )
312 // Set a default colorspace on the frame if not yet set by the producer.
313 // The producer may still change it during get_image.
314 // This way we do not have to modify each producer to set a valid colorspace.
315 mlt_properties properties = MLT_FRAME_PROPERTIES(frame);
316 if ( mlt_properties_get_int( properties, "colorspace" ) <= 0 )
317 mlt_properties_set_int( properties, "colorspace", mlt_service_profile( MLT_FILTER_SERVICE(filter) )->colorspace );
319 if ( !frame->convert_image )
320 frame->convert_image = convert_image;
322 // Not working yet - see comment for get_image() above.
323 // mlt_frame_push_service( frame, mlt_service_profile( MLT_FILTER_SERVICE( filter ) ) );
324 // mlt_frame_push_get_image( frame, get_image );
329 /** Constructor for the filter.
332 mlt_filter filter_avcolour_space_init( void *arg )
334 // Test to see if swscale accepts the arg as resolution
337 int *width = (int*) arg;
340 struct SwsContext *context = sws_getContext( *width, *width, PIX_FMT_RGB32, 64, 64, PIX_FMT_RGB32, SWS_BILINEAR, NULL, NULL, NULL);
342 sws_freeContext( context );
347 mlt_filter filter = mlt_filter_new( );
348 if ( filter != NULL )
349 filter->process = filter_process;