diff options
Diffstat (limited to 'polyp/volume.c')
| -rw-r--r-- | polyp/volume.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/polyp/volume.c b/polyp/volume.c deleted file mode 100644 index 0f153141..00000000 --- a/polyp/volume.c +++ /dev/null @@ -1,176 +0,0 @@ -/* $Id$ */ - -/*** - This file is part of polypaudio. - - polypaudio is free software; you can redistribute it and/or modify - it under the terms of the GNU Lesser General Public License as published - by the Free Software Foundation; either version 2 of the License, - or (at your option) any later version. - - polypaudio is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with polypaudio; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 - USA. -***/ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <assert.h> -#include <stdio.h> -#include <string.h> - -#include "volume.h" - -int pa_cvolume_equal(const pa_cvolume *a, const pa_cvolume *b) { - int i; - assert(a); - assert(b); - - if (a->channels != b->channels) - return 0; - - for (i = 0; i < a->channels; i++) - if (a->values[i] != b->values[i]) - return 0; - - return 1; -} - -pa_cvolume* pa_cvolume_set(pa_cvolume *a, unsigned channels, pa_volume_t v) { - int i; - - assert(a); - assert(channels > 0); - assert(channels <= PA_CHANNELS_MAX); - - a->channels = channels; - - for (i = 0; i < a->channels; i++) - a->values[i] = v; - - return a; -} - -pa_volume_t pa_cvolume_avg(const pa_cvolume *a) { - uint64_t sum = 0; - int i; - assert(a); - - for (i = 0; i < a->channels; i++) - sum += a->values[i]; - - sum /= a->channels; - - return (pa_volume_t) sum; -} - -pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b) { - return pa_sw_volume_from_linear(pa_sw_volume_to_linear(a)* pa_sw_volume_to_linear(b)); -} - -#define USER_DECIBEL_RANGE 30 - -pa_volume_t pa_sw_volume_from_dB(double dB) { - if (dB <= -USER_DECIBEL_RANGE) - return PA_VOLUME_MUTED; - - return (pa_volume_t) ((dB/USER_DECIBEL_RANGE+1)*PA_VOLUME_NORM); -} - -double pa_sw_volume_to_dB(pa_volume_t v) { - if (v == PA_VOLUME_MUTED) - return PA_DECIBEL_MININFTY; - - return ((double) v/PA_VOLUME_NORM-1)*USER_DECIBEL_RANGE; -} - -pa_volume_t pa_sw_volume_from_linear(double v) { - - if (v <= 0) - return PA_VOLUME_MUTED; - - if (v > .999 && v < 1.001) - return PA_VOLUME_NORM; - - return pa_sw_volume_from_dB(20*log10(v)); -} - -double pa_sw_volume_to_linear(pa_volume_t v) { - - if (v == PA_VOLUME_MUTED) - return 0; - - return pow(10, pa_sw_volume_to_dB(v)/20); -} - -char *pa_cvolume_snprint(char *s, size_t l, const pa_cvolume *c) { - unsigned channel; - int first = 1; - char *e; - - assert(s); - assert(l > 0); - assert(c); - - *(e = s) = 0; - - for (channel = 0; channel < c->channels && l > 1; channel++) { - l -= snprintf(e, l, "%s%u: %3u%%", - first ? "" : " ", - channel, - (c->values[channel]*100)/PA_VOLUME_NORM); - - e = strchr(e, 0); - first = 0; - } - - return s; -} - -/** Return non-zero if the volume of all channels is equal to the specified value */ -int pa_cvolume_channels_equal_to(const pa_cvolume *a, pa_volume_t v) { - unsigned c; - assert(a); - - for (c = 0; c < a->channels; c++) - if (a->values[c] != v) - return 0; - - return 1; -} - -pa_cvolume *pa_sw_cvolume_multiply(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) { - unsigned i; - - assert(dest); - assert(a); - assert(b); - - for (i = 0; i < a->channels || i < b->channels || i < PA_CHANNELS_MAX; i++) { - - dest->values[i] = pa_sw_volume_multiply( - i < a->channels ? a->values[i] : PA_VOLUME_NORM, - i < b->channels ? b->values[i] : PA_VOLUME_NORM); - } - - dest->channels = i; - - return dest; -} - -int pa_cvolume_valid(const pa_cvolume *v) { - assert(v); - - if (v->channels <= 0 || v->channels > PA_CHANNELS_MAX) - return 0; - - return 1; -} |