swfdec/swfdec_sound_matrix.h

   1 /* Swfdec
   2  * Copyright (C) 2008 Benjamin Otte <otte@gnome.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301  USA
  18  */
  19
  20 #ifndef __SWFDEC_SOUND_MATRIX_H__
  21 #define __SWFDEC_SOUND_MATRIX_H__
  22
  23 #include <glib.h>
  24
  25 G_BEGIN_DECLS
  26
  27 typedef struct _SwfdecSoundMatrix SwfdecSoundMatrix;
  28
  29 struct _SwfdecSoundMatrix
  30 {
  31   int                   ll;             /* percentage of left channel */
  32   int                   rl;             /* "percentage" of left channel on right speaker */
  33   int                   lr;             /* "percentage" of right channel on left speaker */
  34   int                   rr;             /* percentage of right channel */
  35   int                   volume;         /* don't ask me why volume is seperate */
  36 };
  37
  38 void            swfdec_sound_matrix_init_identity       (SwfdecSoundMatrix *            sound);
  39
  40 gboolean        swfdec_sound_matrix_is_identity         (const SwfdecSoundMatrix *      sound);
  41 gboolean        swfdec_sound_matrix_is_equal            (const SwfdecSoundMatrix *      a,
  42                                                          const SwfdecSoundMatrix *      b);
  43
  44 int             swfdec_sound_matrix_get_pan             (const SwfdecSoundMatrix *      sound);
  45 void            swfdec_sound_matrix_set_pan             (SwfdecSoundMatrix *            sound,
  46                                                          int                            pan);
  47
  48 void            swfdec_sound_matrix_apply               (const SwfdecSoundMatrix *      sound,
  49                                                          gint16 *                       dest,
  50                                                          guint                          n_samples);
  51
  52 void            swfdec_sound_matrix_multiply            (SwfdecSoundMatrix *            dest,
  53                                                          const SwfdecSoundMatrix *      a,
  54                                                          const SwfdecSoundMatrix *      b);
  55
  56
  57 G_END_DECLS
  58 #endif
  59