code.delx.au - pulseaudio/blob - src/pulsecore/svolume_orc.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5   Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
   6   Copyright 2010 Arun Raghavan <arun.raghavan@collabora.co.uk>
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2.1 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include "cpu-orc.h"
  29 #include <pulse/rtclock.h>
  30 #include <pulsecore/sample-util.h>
  31 #include <pulsecore/random.h>
  32 #include <pulsecore/svolume-orc-gen.h>
  33
  34 pa_do_volume_func_t fallback;
  35
  36 static void
  37 pa_volume_s16ne_orc(int16_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
  38     if (channels == 2) {
  39         int64_t v = (int64_t)volumes[1] << 32 | volumes[0];
  40         pa_volume_s16ne_orc_2ch (samples, v, ((length / (sizeof(int16_t))) / 2));
  41     } else if (channels == 1)
  42         pa_volume_s16ne_orc_1ch (samples, volumes[0], length / (sizeof(int16_t)));
  43     else
  44         fallback(samples, volumes, channels, length);
  45 }
  46
  47 void pa_volume_func_init_orc(void) {
  48     pa_log_info("Initialising ORC optimized volume functions.");
  49
  50     fallback = pa_get_volume_func(PA_SAMPLE_S16NE);
  51     pa_set_volume_func(PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_orc);
  52 }