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
  25 // ffmpeg Header files
  26 #include <avformat.h>
  27 #ifdef SWSCALE
  28 #include <swscale.h>
  29 #endif
  30
  31 #if LIBAVUTIL_VERSION_INT < (50<<16)
  32 #define PIX_FMT_YUYV422 PIX_FMT_YUV422
  33 #endif
  34
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37
  38 #if 0 // This test might come in handy elsewhere someday.
  39 static int is_big_endian( )
  40 {
  41         union { int i; char c[ 4 ]; } big_endian_test;
  42         big_endian_test.i = 1;
  43
  44         return big_endian_test.c[ 0 ] != 1;
  45 }
  46 #endif
  47
  48 static int convert_mlt_to_av_cs( mlt_image_format format )
  49 {
  50         int value = 0;
  51
  52         switch( format )
  53         {
  54                 case mlt_image_rgb24:
  55                         value = PIX_FMT_RGB24;
  56                         break;
  57                 case mlt_image_rgb24a:
  58                 case mlt_image_opengl:
  59                         value = PIX_FMT_RGBA;
  60                         break;
  61                 case mlt_image_yuv422:
  62                         value = PIX_FMT_YUYV422;
  63                         break;
  64                 case mlt_image_yuv420p:
  65                         value = PIX_FMT_YUV420P;
  66                         break;
  67                 case mlt_image_none:
  68                         mlt_log_error( NULL, "[filter avcolor_space] Invalid format\n" );
  69                         break;
  70         }
  71
  72         return value;
  73 }
  74
  75 static void set_luma_transfer( struct SwsContext *context, int colorspace, int no_scale )
  76 {
  77         int *coefficients;
  78         int range;
  79         int brightness, contrast, saturation;
  80
  81         if ( sws_getColorspaceDetails( context, &coefficients, &range, &coefficients, &range,
  82                         &brightness, &contrast, &saturation ) != -1 )
  83         {
  84                 // Don't change these from defaults unless explicitly told to.
  85                 if ( no_scale )
  86                         range = 1;
  87                 if ( colorspace == 709 )
  88                         coefficients = sws_getCoefficients( SWS_CS_ITU709 );
  89                 else if ( colorspace == 240 )
  90                         coefficients = sws_getCoefficients( SWS_CS_SMPTE240M );
  91                 sws_setColorspaceDetails( context, coefficients, range, coefficients, range,
  92                         brightness, contrast, saturation );
  93         }
  94 }
  95
  96 static void av_convert_image( uint8_t *out, uint8_t *in, int out_fmt, int in_fmt,
  97         int width, int height, int colorspace, int no_scale )
  98 {
  99         AVPicture input;
 100         AVPicture output;
 101         int flags = SWS_BILINEAR | SWS_ACCURATE_RND;
 102
 103         if ( out_fmt == PIX_FMT_YUYV422 )
 104                 flags |= SWS_FULL_CHR_H_INP;
 105         else
 106                 flags |= SWS_FULL_CHR_H_INT;
 107 #ifdef USE_MMX
 108         flags |= SWS_CPU_CAPS_MMX;
 109 #endif
 110 #ifdef USE_SSE
 111         flags |= SWS_CPU_CAPS_MMX2;
 112 #endif
 113
 114         avpicture_fill( &input, in, in_fmt, width, height );
 115         avpicture_fill( &output, out, out_fmt, width, height );
 116 #ifdef SWSCALE
 117         struct SwsContext *context = sws_getContext( width, height, in_fmt,
 118                 width, height, out_fmt, flags, NULL, NULL, NULL);
 119         set_luma_transfer( context, colorspace, no_scale );
 120         sws_scale( context, input.data, input.linesize, 0, height,
 121                 output.data, output.linesize);
 122         sws_freeContext( context );
 123 #else
 124         img_convert( &output, out_fmt, &input, in_fmt, width, height );
 125 #endif
 126 }
 127
 128 /** Do it :-).
 129 */
 130
 131 static int convert_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, mlt_image_format output_format )
 132 {
 133         mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
 134         int width = mlt_properties_get_int( properties, "width" );
 135         int height = mlt_properties_get_int( properties, "height" );
 136         int error = 0;
 137
 138         if ( *format != output_format )
 139         {
 140                 mlt_log_debug( NULL, "[filter avcolor_space] %s -> %s @ %dx%d\n",
 141                         mlt_image_format_name( *format ), mlt_image_format_name( output_format ),
 142                         width, height );
 143
 144                 int in_fmt = convert_mlt_to_av_cs( *format );
 145                 int out_fmt = convert_mlt_to_av_cs( output_format );
 146                 int size = avpicture_get_size( out_fmt, width, height );
 147                 uint8_t *output = mlt_pool_alloc( size );
 148
 149                 if ( *format == mlt_image_rgb24a || *format == mlt_image_opengl )
 150                 {
 151                         register int len = width * height;
 152                         uint8_t *alpha = mlt_pool_alloc( len );
 153
 154                         if ( alpha )
 155                         {
 156                                 // Extract the alpha mask from the RGBA image using Duff's Device
 157                                 register uint8_t *s = *image + 3; // start on the alpha component
 158                                 register uint8_t *d = alpha;
 159                                 register int n = ( len + 7 ) / 8;
 160
 161                                 switch ( len % 8 )
 162                                 {
 163                                         case 0: do { *d++ = *s; s += 4;
 164                                         case 7:          *d++ = *s; s += 4;
 165                                         case 6:          *d++ = *s; s += 4;
 166                                         case 5:          *d++ = *s; s += 4;
 167                                         case 4:          *d++ = *s; s += 4;
 168                                         case 3:          *d++ = *s; s += 4;
 169                                         case 2:          *d++ = *s; s += 4;
 170                                         case 1:          *d++ = *s; s += 4;
 171                                                         }
 172                                                         while ( --n > 0 );
 173                                 }
 174                                 mlt_properties_set_data( properties, "alpha", alpha, len, mlt_pool_release, NULL );
 175                                 frame->get_alpha_mask = NULL;
 176                         }
 177                 }
 178
 179                 // Update the output
 180                 int colorspace = mlt_properties_get_int( properties, "colorspace" );
 181                 int no_scale_luma = 0;
 182                 if ( *format == mlt_image_yuv422 && mlt_properties_get_int( properties, "skip_luma_scale" )
 183                          && ( output_format == mlt_image_rgb24 || output_format == mlt_image_rgb24a ) )
 184                 {
 185                         no_scale_luma = 1;
 186                         mlt_properties_set( properties, "skip_luma_scale", NULL );
 187                 }
 188                 av_convert_image( output, *image, out_fmt, in_fmt, width, height, colorspace, no_scale_luma );
 189                 *image = output;
 190                 *format = output_format;
 191                 mlt_properties_set_data( properties, "image", output, size, mlt_pool_release, NULL );
 192                 mlt_properties_set_int( properties, "format", output_format );
 193
 194                 if ( output_format == mlt_image_rgb24a || output_format == mlt_image_opengl )
 195                 {
 196                         register int len = width * height;
 197                         int alpha_size = 0;
 198                         uint8_t *alpha = mlt_frame_get_alpha_mask( frame );
 199                         mlt_properties_get_data( properties, "alpha", &alpha_size );
 200
 201                         if ( alpha && alpha_size >= len )
 202                         {
 203                                 // Merge the alpha mask from into the RGBA image using Duff's Device
 204                                 register uint8_t *s = alpha;
 205                                 register uint8_t *d = *image + 3; // start on the alpha component
 206                                 register int n = ( len + 7 ) / 8;
 207
 208                                 switch ( len % 8 )
 209                                 {
 210                                         case 0: do { *d = *s++; d += 4;
 211                                         case 7:          *d = *s++; d += 4;
 212                                         case 6:          *d = *s++; d += 4;
 213                                         case 5:          *d = *s++; d += 4;
 214                                         case 4:          *d = *s++; d += 4;
 215                                         case 3:          *d = *s++; d += 4;
 216                                         case 2:          *d = *s++; d += 4;
 217                                         case 1:          *d = *s++; d += 4;
 218                                                         }
 219                                                         while ( --n > 0 );
 220                                 }
 221                         }
 222                 }
 223         }
 224         return error;
 225 }
 226
 227 /** Filter processing.
 228 */
 229
 230 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 231 {
 232         frame->convert_image = convert_image;
 233         return frame;
 234 }
 235
 236 /** Constructor for the filter.
 237 */
 238
 239 mlt_filter filter_avcolour_space_init( void *arg )
 240 {
 241 #ifdef SWSCALE
 242 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(7<<8)+2))
 243         // Test to see if swscale accepts the arg as resolution
 244         if ( arg )
 245         {
 246                 int width = (int) arg;
 247                 struct SwsContext *context = sws_getContext( width, width, PIX_FMT_RGB32, 64, 64, PIX_FMT_RGB32, SWS_BILINEAR, NULL, NULL, NULL);
 248                 if ( context )
 249                         sws_freeContext( context );
 250                 else
 251                         return NULL;
 252         }
 253 #else
 254         return NULL;
 255 #endif
 256 #endif
 257         mlt_filter this = mlt_filter_new( );
 258         if ( this != NULL )
 259                 this->process = filter_process;
 260         return this;
 261 }
 262