git.sesse.net Git - mlt/blob - src/modules/avformat/filter_avcolour_space.c

   1 /*
   2  * filter_avcolour_space.c -- Colour space filter
   3  * Copyright (C) 2004-2005 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  */
  20
  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
  26 // ffmpeg Header files
  27 #include <libavformat/avformat.h>
  28 #ifdef SWSCALE
  29 #include <libswscale/swscale.h>
  30 #endif
  31
  32 #if LIBAVUTIL_VERSION_INT < (50<<16)
  33 #define PIX_FMT_YUYV422 PIX_FMT_YUV422
  34 #endif
  35
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38
  39 #if 0 // This test might come in handy elsewhere someday.
  40 static int is_big_endian( )
  41 {
  42         union { int i; char c[ 4 ]; } big_endian_test;
  43         big_endian_test.i = 1;
  44
  45         return big_endian_test.c[ 0 ] != 1;
  46 }
  47 #endif
  48
  49 static int convert_mlt_to_av_cs( mlt_image_format format )
  50 {
  51         int value = 0;
  52
  53         switch( format )
  54         {
  55                 case mlt_image_rgb24:
  56                         value = PIX_FMT_RGB24;
  57                         break;
  58                 case mlt_image_rgb24a:
  59                 case mlt_image_opengl:
  60                         value = PIX_FMT_RGBA;
  61                         break;
  62                 case mlt_image_yuv422:
  63                         value = PIX_FMT_YUYV422;
  64                         break;
  65                 case mlt_image_yuv420p:
  66                         value = PIX_FMT_YUV420P;
  67                         break;
  68                 case mlt_image_none:
  69                         mlt_log_error( NULL, "[filter avcolor_space] Invalid format\n" );
  70                         break;
  71         }
  72
  73         return value;
  74 }
  75
  76 static void set_luma_transfer( struct SwsContext *context, int colorspace, int use_full_range )
  77 {
  78 #if defined(SWSCALE) && (LIBSWSCALE_VERSION_INT >= ((0<<16)+(7<<8)+2))
  79         int *coefficients;
  80         const int *new_coefficients;
  81         int full_range;
  82         int brightness, contrast, saturation;
  83
  84         if ( sws_getColorspaceDetails( context, &coefficients, &full_range, &coefficients, &full_range,
  85                         &brightness, &contrast, &saturation ) != -1 )
  86         {
  87                 // Don't change these from defaults unless explicitly told to.
  88                 if ( use_full_range >= 0 )
  89                         full_range = use_full_range;
  90                 switch ( colorspace )
  91                 {
  92                 case 170:
  93                 case 470:
  94                 case 601:
  95                 case 624:
  96                         new_coefficients = sws_getCoefficients( SWS_CS_ITU601 );
  97                         break;
  98                 case 240:
  99                         new_coefficients = sws_getCoefficients( SWS_CS_SMPTE240M );
 100                         break;
 101                 case 709:
 102                         new_coefficients = sws_getCoefficients( SWS_CS_ITU709 );
 103                         break;
 104                 default:
 105                         new_coefficients = coefficients;
 106                         break;
 107                 }
 108                 sws_setColorspaceDetails( context, new_coefficients, full_range, new_coefficients, full_range,
 109                         brightness, contrast, saturation );
 110         }
 111 #endif
 112 }
 113
 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 )
 116 {
 117         AVPicture input;
 118         AVPicture output;
 119 #ifdef SWSCALE
 120         int flags = SWS_BILINEAR | SWS_ACCURATE_RND;
 121
 122         if ( out_fmt == PIX_FMT_YUYV422 )
 123                 flags |= SWS_FULL_CHR_H_INP;
 124         else
 125                 flags |= SWS_FULL_CHR_H_INT;
 126 #ifdef USE_MMX
 127         flags |= SWS_CPU_CAPS_MMX;
 128 #endif
 129 #ifdef USE_SSE
 130         flags |= SWS_CPU_CAPS_MMX2;
 131 #endif
 132 #endif /* SWSCALE */
 133
 134         avpicture_fill( &input, in, in_fmt, width, height );
 135         avpicture_fill( &output, out, out_fmt, width, height );
 136 #ifdef SWSCALE
 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 );
 143 #else
 144         img_convert( &output, out_fmt, &input, in_fmt, width, height );
 145 #endif
 146 }
 147
 148 /** Do it :-).
 149 */
 150
 151 static int convert_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, mlt_image_format output_format )
 152 {
 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" );
 156         int error = 0;
 157
 158         if ( *format != output_format )
 159         {
 160                 int colorspace = mlt_properties_get_int( properties, "colorspace" );
 161                 int force_full_luma = -1;
 162
 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 );
 166
 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 );
 171
 172                 if ( *format == mlt_image_rgb24a || *format == mlt_image_opengl )
 173                 {
 174                         register int len = width * height;
 175                         uint8_t *alpha = mlt_pool_alloc( len );
 176
 177                         if ( alpha )
 178                         {
 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;
 183
 184                                 switch ( len % 8 )
 185                                 {
 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;
 194                                                         }
 195                                                         while ( --n > 0 );
 196                                 }
 197                                 mlt_frame_set_alpha( frame, alpha, len, mlt_pool_release );
 198                                 frame->get_alpha_mask = NULL;
 199                         }
 200                 }
 201
 202                 // Update the output
 203                 if ( *format == mlt_image_yuv422 && mlt_properties_get( properties, "force_full_luma" )
 204                      && ( output_format == mlt_image_rgb24 || output_format == mlt_image_rgb24a ) )
 205                 {
 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 );
 211                 }
 212                 av_convert_image( output, *image, out_fmt, in_fmt, width, height, colorspace, force_full_luma );
 213                 *image = output;
 214                 *format = output_format;
 215                 mlt_frame_set_image( frame, output, size, mlt_pool_release );
 216                 mlt_properties_set_int( properties, "format", output_format );
 217
 218                 if ( output_format == mlt_image_rgb24a || output_format == mlt_image_opengl )
 219                 {
 220                         register int len = width * height;
 221                         int alpha_size = 0;
 222                         uint8_t *alpha = mlt_frame_get_alpha_mask( frame );
 223                         mlt_properties_get_data( properties, "alpha", &alpha_size );
 224
 225                         if ( alpha && alpha_size >= len )
 226                         {
 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;
 231
 232                                 switch ( len % 8 )
 233                                 {
 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;
 242                                                         }
 243                                                         while ( --n > 0 );
 244                                 }
 245                         }
 246                 }
 247         }
 248         return error;
 249 }
 250
 251 /* TODO: The below is not working because swscale does not have
 252  * adjustable coefficients yet for RGB->YUV */
 253 #if 0
 254 static int get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
 255 {
 256         int error = 0;
 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;
 261
 262         error = mlt_frame_get_image( frame, image, format, width, height, writable );
 263
 264         int frame_colorspace = mlt_properties_get_int( properties, "colorspace" );
 265
 266         if ( !error && *format == mlt_image_yuv422 && profile->colorspace > 0 &&
 267              frame_colorspace > 0 && frame_colorspace != profile->colorspace )
 268         {
 269                 mlt_log_debug( NULL, "[filter avcolor_space] colorspace %d -> %d\n",
 270                         frame_colorspace, profile->colorspace );
 271
 272                 // Convert to RGB using frame's colorspace
 273                 error = convert_image( frame, image, &format_from, format_to );
 274
 275                 // Convert to YUV using profile's colorspace
 276                 if ( !error )
 277                 {
 278                         *image = mlt_properties_get_data( properties, "image", NULL );
 279                         format_from = mlt_image_rgb24;
 280                         format_to = *format;
 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 );
 284                 }
 285         }
 286
 287         return error;
 288 }
 289 #endif
 290
 291 /** Filter processing.
 292 */
 293
 294 static mlt_frame filter_process( mlt_filter filter, mlt_frame frame )
 295 {
 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 );
 302
 303         frame->convert_image = convert_image;
 304
 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 );
 308
 309         return frame;
 310 }
 311
 312 /** Constructor for the filter.
 313 */
 314
 315 mlt_filter filter_avcolour_space_init( void *arg )
 316 {
 317 #ifdef SWSCALE
 318 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(7<<8)+2))
 319         // Test to see if swscale accepts the arg as resolution
 320         if ( arg )
 321         {
 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);
 324                 if ( context )
 325                         sws_freeContext( context );
 326                 else
 327                         return NULL;
 328         }
 329 #else
 330         return NULL;
 331 #endif
 332 #endif
 333         mlt_filter filter = mlt_filter_new( );
 334         if ( filter != NULL )
 335                 filter->process = filter_process;
 336         return filter;
 337 }
 338