code.delx.au - pulseaudio/blob - src/pulsecore/remap.h

   1 #ifndef fooremapfoo
   2 #define fooremapfoo
   3
   4 /***
   5   This file is part of PulseAudio.
   6
   7   Copyright 2004-2006 Lennart Poettering
   8   Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk.com>
   9
  10   PulseAudio is free software; you can redistribute it and/or modify
  11   it under the terms of the GNU Lesser General Public License as published
  12   by the Free Software Foundation; either version 2.1 of the License,
  13   or (at your option) any later version.
  14
  15   PulseAudio is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with PulseAudio; if not, write to the Free Software
  22   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  23   USA.
  24 ***/
  25
  26 #include <pulse/sample.h>
  27
  28 typedef struct pa_remap pa_remap_t;
  29
  30 typedef void (*pa_do_remap_func_t) (pa_remap_t *m, void *d, const void *s, unsigned n);
  31
  32 struct pa_remap {
  33     pa_sample_format_t format;
  34     pa_sample_spec i_ss, o_ss;
  35     float map_table_f[PA_CHANNELS_MAX][PA_CHANNELS_MAX];
  36     int32_t map_table_i[PA_CHANNELS_MAX][PA_CHANNELS_MAX];
  37     pa_do_remap_func_t do_remap;
  38 };
  39
  40 void pa_init_remap_func(pa_remap_t *m);
  41
  42 /* custom installation of init functions */
  43 typedef void (*pa_init_remap_func_t) (pa_remap_t *m);
  44
  45 pa_init_remap_func_t pa_get_init_remap_func(void);
  46 void pa_set_init_remap_func(pa_init_remap_func_t func);
  47
  48 /* Check if remapping can be performed by just copying some or all input
  49  * channels' data to output channels. Returns true and a table of input
  50  * channel indices, or false otherwise.
  51  *
  52  * The table contains an entry for each output channels. Each table entry given
  53  * either the input channel index to be copied, or -1 indicating that the
  54  * output channel is not used and hence zero.
  55  */
  56 bool pa_setup_remap_arrange(const pa_remap_t *m, int8_t arrange[PA_CHANNELS_MAX]);
  57
  58 void pa_set_remap_func(pa_remap_t *m, pa_do_remap_func_t func_s16,
  59     pa_do_remap_func_t func_float);
  60
  61 #endif /* fooremapfoo */