mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-03 09:01:50 -05:00
367 lines
8.4 KiB
C
367 lines
8.4 KiB
C
/***
|
|
This file is part of PulseAudio.
|
|
|
|
Copyright 2004-2006 Lennart Poettering
|
|
|
|
PulseAudio 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.
|
|
|
|
PulseAudio 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 PulseAudio; 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 <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include <pulse/i18n.h>
|
|
#include <pulsecore/core-util.h>
|
|
#include <pulsecore/macro.h>
|
|
|
|
#include "volume.h"
|
|
|
|
int pa_cvolume_equal(const pa_cvolume *a, const pa_cvolume *b) {
|
|
int i;
|
|
pa_assert(a);
|
|
pa_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_init(pa_cvolume *a) {
|
|
unsigned c;
|
|
|
|
pa_assert(a);
|
|
|
|
a->channels = 0;
|
|
|
|
for (c = 0; c < PA_CHANNELS_MAX; c++)
|
|
a->values[c] = (pa_volume_t) -1;
|
|
|
|
return a;
|
|
}
|
|
|
|
pa_cvolume* pa_cvolume_set(pa_cvolume *a, unsigned channels, pa_volume_t v) {
|
|
int i;
|
|
|
|
pa_assert(a);
|
|
pa_assert(channels > 0);
|
|
pa_assert(channels <= PA_CHANNELS_MAX);
|
|
|
|
a->channels = (uint8_t) 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;
|
|
pa_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_cvolume_max(const pa_cvolume *a) {
|
|
pa_volume_t m = 0;
|
|
int i;
|
|
pa_assert(a);
|
|
|
|
for (i = 0; i < a->channels; i++)
|
|
if (a->values[i] > m)
|
|
m = a->values[i];
|
|
|
|
return m;
|
|
}
|
|
|
|
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));
|
|
}
|
|
|
|
pa_volume_t pa_sw_volume_divide(pa_volume_t a, pa_volume_t b) {
|
|
double v = pa_sw_volume_to_linear(b);
|
|
|
|
if (v <= 0)
|
|
return 0;
|
|
|
|
return pa_sw_volume_from_linear(pa_sw_volume_to_linear(a) / v);
|
|
}
|
|
|
|
#define USER_DECIBEL_RANGE 60
|
|
|
|
pa_volume_t pa_sw_volume_from_dB(double dB) {
|
|
if (isinf(dB) < 0 || dB <= -USER_DECIBEL_RANGE)
|
|
return PA_VOLUME_MUTED;
|
|
|
|
return (pa_volume_t) lrint((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(10.0, pa_sw_volume_to_dB(v)/20.0);
|
|
}
|
|
|
|
char *pa_cvolume_snprint(char *s, size_t l, const pa_cvolume *c) {
|
|
unsigned channel;
|
|
pa_bool_t first = TRUE;
|
|
char *e;
|
|
|
|
pa_assert(s);
|
|
pa_assert(l > 0);
|
|
pa_assert(c);
|
|
|
|
pa_init_i18n();
|
|
|
|
if (!pa_cvolume_valid(c)) {
|
|
pa_snprintf(s, l, _("(invalid)"));
|
|
return s;
|
|
}
|
|
|
|
*(e = s) = 0;
|
|
|
|
for (channel = 0; channel < c->channels && l > 1; channel++) {
|
|
l -= pa_snprintf(e, l, "%s%u: %3u%%",
|
|
first ? "" : " ",
|
|
channel,
|
|
(c->values[channel]*100)/PA_VOLUME_NORM);
|
|
|
|
e = strchr(e, 0);
|
|
first = FALSE;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
char *pa_sw_cvolume_snprint_dB(char *s, size_t l, const pa_cvolume *c) {
|
|
unsigned channel;
|
|
pa_bool_t first = TRUE;
|
|
char *e;
|
|
|
|
pa_assert(s);
|
|
pa_assert(l > 0);
|
|
pa_assert(c);
|
|
|
|
pa_init_i18n();
|
|
|
|
if (!pa_cvolume_valid(c)) {
|
|
pa_snprintf(s, l, _("(invalid)"));
|
|
return s;
|
|
}
|
|
|
|
*(e = s) = 0;
|
|
|
|
for (channel = 0; channel < c->channels && l > 1; channel++) {
|
|
l -= pa_snprintf(e, l, "%s%u: %0.2f dB",
|
|
first ? "" : " ",
|
|
channel,
|
|
pa_sw_volume_to_dB(c->values[channel]));
|
|
|
|
e = strchr(e, 0);
|
|
first = FALSE;
|
|
}
|
|
|
|
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;
|
|
pa_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;
|
|
|
|
pa_assert(dest);
|
|
pa_assert(a);
|
|
pa_assert(b);
|
|
|
|
for (i = 0; i < a->channels && i < b->channels && i < PA_CHANNELS_MAX; i++)
|
|
dest->values[i] = pa_sw_volume_multiply(a->values[i], b->values[i]);
|
|
|
|
dest->channels = (uint8_t) i;
|
|
|
|
return dest;
|
|
}
|
|
|
|
pa_cvolume *pa_sw_cvolume_divide(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
|
|
unsigned i;
|
|
|
|
pa_assert(dest);
|
|
pa_assert(a);
|
|
pa_assert(b);
|
|
|
|
for (i = 0; i < a->channels && i < b->channels && i < PA_CHANNELS_MAX; i++)
|
|
dest->values[i] = pa_sw_volume_divide(a->values[i], b->values[i]);
|
|
|
|
dest->channels = (uint8_t) i;
|
|
|
|
return dest;
|
|
}
|
|
|
|
int pa_cvolume_valid(const pa_cvolume *v) {
|
|
unsigned c;
|
|
|
|
pa_assert(v);
|
|
|
|
if (v->channels <= 0 || v->channels > PA_CHANNELS_MAX)
|
|
return 0;
|
|
|
|
for (c = 0; c < v->channels; c++)
|
|
if (v->values[c] == (pa_volume_t) -1)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static pa_bool_t on_left(pa_channel_position_t p) {
|
|
|
|
return
|
|
p == PA_CHANNEL_POSITION_FRONT_LEFT ||
|
|
p == PA_CHANNEL_POSITION_REAR_LEFT ||
|
|
p == PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER ||
|
|
p == PA_CHANNEL_POSITION_SIDE_LEFT ||
|
|
p == PA_CHANNEL_POSITION_TOP_FRONT_LEFT ||
|
|
p == PA_CHANNEL_POSITION_TOP_REAR_LEFT;
|
|
}
|
|
|
|
static pa_bool_t on_right(pa_channel_position_t p) {
|
|
|
|
return
|
|
p == PA_CHANNEL_POSITION_FRONT_RIGHT ||
|
|
p == PA_CHANNEL_POSITION_REAR_RIGHT ||
|
|
p == PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER ||
|
|
p == PA_CHANNEL_POSITION_SIDE_RIGHT ||
|
|
p == PA_CHANNEL_POSITION_TOP_FRONT_RIGHT ||
|
|
p == PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
|
|
}
|
|
|
|
static pa_bool_t on_center(pa_channel_position_t p) {
|
|
|
|
return
|
|
p == PA_CHANNEL_POSITION_FRONT_CENTER ||
|
|
p == PA_CHANNEL_POSITION_REAR_CENTER ||
|
|
p == PA_CHANNEL_POSITION_TOP_CENTER ||
|
|
p == PA_CHANNEL_POSITION_TOP_FRONT_CENTER ||
|
|
p == PA_CHANNEL_POSITION_TOP_REAR_CENTER;
|
|
}
|
|
|
|
static pa_bool_t on_lfe(pa_channel_position_t p) {
|
|
return
|
|
p == PA_CHANNEL_POSITION_LFE;
|
|
}
|
|
|
|
pa_cvolume *pa_cvolume_remap(pa_cvolume *v, pa_channel_map *from, pa_channel_map *to) {
|
|
int a, b;
|
|
pa_cvolume result;
|
|
|
|
pa_assert(v);
|
|
pa_assert(from);
|
|
pa_assert(to);
|
|
pa_assert(v->channels == from->channels);
|
|
|
|
if (pa_channel_map_equal(from, to))
|
|
return v;
|
|
|
|
result.channels = to->channels;
|
|
|
|
for (b = 0; b < to->channels; b++) {
|
|
pa_volume_t k = 0;
|
|
int n = 0;
|
|
|
|
for (a = 0; a < from->channels; a++)
|
|
if (from->map[a] == to->map[b]) {
|
|
k += v->values[a];
|
|
n ++;
|
|
}
|
|
|
|
if (n <= 0) {
|
|
for (a = 0; a < from->channels; a++)
|
|
if ((on_left(from->map[a]) && on_left(to->map[b])) ||
|
|
(on_right(from->map[a]) && on_right(to->map[b])) ||
|
|
(on_center(from->map[a]) && on_center(to->map[b])) ||
|
|
(on_lfe(from->map[a]) && on_lfe(to->map[b]))) {
|
|
|
|
k += v->values[a];
|
|
n ++;
|
|
}
|
|
}
|
|
|
|
if (n <= 0)
|
|
k = pa_cvolume_avg(v);
|
|
else
|
|
k /= n;
|
|
|
|
result.values[b] = k;
|
|
}
|
|
|
|
*v = result;
|
|
return v;
|
|
}
|
|
|
|
int pa_cvolume_compatible(const pa_cvolume *v, const pa_sample_spec *ss) {
|
|
|
|
pa_assert(v);
|
|
pa_assert(ss);
|
|
|
|
if (!pa_cvolume_valid(v))
|
|
return 0;
|
|
|
|
if (!pa_sample_spec_valid(ss))
|
|
return 0;
|
|
|
|
return v->channels == ss->channels;
|
|
}
|