play.c

   1 /* Copyright (C) <2010> Douglas Bagnall <douglas@halo.gen.nz>
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Library General Public
   5  * License as published by the Free Software Foundation; either
   6  * version 2 of the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Library General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Library General Public
  14  * License along with this library; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 02111-1307, USA.
  17  */
  18
  19 #include "sparrow.h"
  20 #include "gstsparrow.h"
  21
  22 #include <string.h>
  23 #include <math.h>
  24
  25
  26 UNUSED
  27 static void
  28 simple_negation(guint8 * bytes, guint size){
  29   guint i;
  30   guint32 * data = (guint32 *)bytes;
  31   //could use sse for superspeed
  32   for (i = 0; i < size / 4; i++){
  33     data[i] = ~data[i];
  34   }
  35 }
  36
  37 UNUSED
  38 static void
  39 gamma_negation(GstSparrow *sparrow, guint8 *in, guint8 *out){
  40   //guint i;
  41   //XXX  could try oil_tablelookup_u8
  42   //for (i = 0; i < size; i++){
  43   //  out[i] = sparrow_rgb_gamma_full_range_REVERSE[in[i]];
  44   // }
  45 }
  46
  47 INVISIBLE sparrow_state
  48 mode_play(GstSparrow *sparrow, guint8 *in, guint8 *out){
  49   //do actual stuff here
  50   memcpy(out, in, sparrow->out.size);
  51   simple_negation(out, sparrow->out.size);
  52
  53   return SPARROW_STATUS_QUO;
  54 }
  55
  56 INVISIBLE void init_play(GstSparrow *sparrow){}
  57 INVISIBLE void finalise_play(GstSparrow *sparrow){}