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pulseaudio/src/pulse/channelmap.c
Lennart Poettering 27427c114c channelmap: Use "Subwoofer" as pretty name for LFE 
The pretty name is suspposed to be understandable by non-technical
folks, and they are generally more used to the term "Subwoofer" than
"Low Frequency Emitter", so let's change the name here.
2010-02-21 17:48:36 +01:00

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/***
This file is part of PulseAudio.
Copyright 2005-2006 Lennart Poettering
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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 2.1 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <pulse/xmalloc.h>
#include <pulse/i18n.h>
#include <pulsecore/core-util.h>
#include <pulsecore/macro.h>
#include <pulsecore/bitset.h>
#include <pulsecore/sample-util.h>
#include "channelmap.h"
const char *const table[PA_CHANNEL_POSITION_MAX] = {
[PA_CHANNEL_POSITION_MONO] = "mono",
[PA_CHANNEL_POSITION_FRONT_CENTER] = "front-center",
[PA_CHANNEL_POSITION_FRONT_LEFT] = "front-left",
[PA_CHANNEL_POSITION_FRONT_RIGHT] = "front-right",
[PA_CHANNEL_POSITION_REAR_CENTER] = "rear-center",
[PA_CHANNEL_POSITION_REAR_LEFT] = "rear-left",
[PA_CHANNEL_POSITION_REAR_RIGHT] = "rear-right",
[PA_CHANNEL_POSITION_LFE] = "lfe",
[PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = "front-left-of-center",
[PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = "front-right-of-center",
[PA_CHANNEL_POSITION_SIDE_LEFT] = "side-left",
[PA_CHANNEL_POSITION_SIDE_RIGHT] = "side-right",
[PA_CHANNEL_POSITION_AUX0] = "aux0",
[PA_CHANNEL_POSITION_AUX1] = "aux1",
[PA_CHANNEL_POSITION_AUX2] = "aux2",
[PA_CHANNEL_POSITION_AUX3] = "aux3",
[PA_CHANNEL_POSITION_AUX4] = "aux4",
[PA_CHANNEL_POSITION_AUX5] = "aux5",
[PA_CHANNEL_POSITION_AUX6] = "aux6",
[PA_CHANNEL_POSITION_AUX7] = "aux7",
[PA_CHANNEL_POSITION_AUX8] = "aux8",
[PA_CHANNEL_POSITION_AUX9] = "aux9",
[PA_CHANNEL_POSITION_AUX10] = "aux10",
[PA_CHANNEL_POSITION_AUX11] = "aux11",
[PA_CHANNEL_POSITION_AUX12] = "aux12",
[PA_CHANNEL_POSITION_AUX13] = "aux13",
[PA_CHANNEL_POSITION_AUX14] = "aux14",
[PA_CHANNEL_POSITION_AUX15] = "aux15",
[PA_CHANNEL_POSITION_AUX16] = "aux16",
[PA_CHANNEL_POSITION_AUX17] = "aux17",
[PA_CHANNEL_POSITION_AUX18] = "aux18",
[PA_CHANNEL_POSITION_AUX19] = "aux19",
[PA_CHANNEL_POSITION_AUX20] = "aux20",
[PA_CHANNEL_POSITION_AUX21] = "aux21",
[PA_CHANNEL_POSITION_AUX22] = "aux22",
[PA_CHANNEL_POSITION_AUX23] = "aux23",
[PA_CHANNEL_POSITION_AUX24] = "aux24",
[PA_CHANNEL_POSITION_AUX25] = "aux25",
[PA_CHANNEL_POSITION_AUX26] = "aux26",
[PA_CHANNEL_POSITION_AUX27] = "aux27",
[PA_CHANNEL_POSITION_AUX28] = "aux28",
[PA_CHANNEL_POSITION_AUX29] = "aux29",
[PA_CHANNEL_POSITION_AUX30] = "aux30",
[PA_CHANNEL_POSITION_AUX31] = "aux31",
[PA_CHANNEL_POSITION_TOP_CENTER] = "top-center",
[PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = "top-front-center",
[PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = "top-front-left",
[PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = "top-front-right",
[PA_CHANNEL_POSITION_TOP_REAR_CENTER] = "top-rear-center",
[PA_CHANNEL_POSITION_TOP_REAR_LEFT] = "top-rear-left",
[PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = "top-rear-right"
};
const char *const pretty_table[PA_CHANNEL_POSITION_MAX] = {
[PA_CHANNEL_POSITION_MONO] = N_("Mono"),
[PA_CHANNEL_POSITION_FRONT_CENTER] = N_("Front Center"),
[PA_CHANNEL_POSITION_FRONT_LEFT] = N_("Front Left"),
[PA_CHANNEL_POSITION_FRONT_RIGHT] = N_("Front Right"),
[PA_CHANNEL_POSITION_REAR_CENTER] = N_("Rear Center"),
[PA_CHANNEL_POSITION_REAR_LEFT] = N_("Rear Left"),
[PA_CHANNEL_POSITION_REAR_RIGHT] = N_("Rear Right"),
[PA_CHANNEL_POSITION_LFE] = N_("Subwoofer"),
[PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = N_("Front Left-of-center"),
[PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = N_("Front Right-of-center"),
[PA_CHANNEL_POSITION_SIDE_LEFT] = N_("Side Left"),
[PA_CHANNEL_POSITION_SIDE_RIGHT] = N_("Side Right"),
[PA_CHANNEL_POSITION_AUX0] = N_("Auxiliary 0"),
[PA_CHANNEL_POSITION_AUX1] = N_("Auxiliary 1"),
[PA_CHANNEL_POSITION_AUX2] = N_("Auxiliary 2"),
[PA_CHANNEL_POSITION_AUX3] = N_("Auxiliary 3"),
[PA_CHANNEL_POSITION_AUX4] = N_("Auxiliary 4"),
[PA_CHANNEL_POSITION_AUX5] = N_("Auxiliary 5"),
[PA_CHANNEL_POSITION_AUX6] = N_("Auxiliary 6"),
[PA_CHANNEL_POSITION_AUX7] = N_("Auxiliary 7"),
[PA_CHANNEL_POSITION_AUX8] = N_("Auxiliary 8"),
[PA_CHANNEL_POSITION_AUX9] = N_("Auxiliary 9"),
[PA_CHANNEL_POSITION_AUX10] = N_("Auxiliary 10"),
[PA_CHANNEL_POSITION_AUX11] = N_("Auxiliary 11"),
[PA_CHANNEL_POSITION_AUX12] = N_("Auxiliary 12"),
[PA_CHANNEL_POSITION_AUX13] = N_("Auxiliary 13"),
[PA_CHANNEL_POSITION_AUX14] = N_("Auxiliary 14"),
[PA_CHANNEL_POSITION_AUX15] = N_("Auxiliary 15"),
[PA_CHANNEL_POSITION_AUX16] = N_("Auxiliary 16"),
[PA_CHANNEL_POSITION_AUX17] = N_("Auxiliary 17"),
[PA_CHANNEL_POSITION_AUX18] = N_("Auxiliary 18"),
[PA_CHANNEL_POSITION_AUX19] = N_("Auxiliary 19"),
[PA_CHANNEL_POSITION_AUX20] = N_("Auxiliary 20"),
[PA_CHANNEL_POSITION_AUX21] = N_("Auxiliary 21"),
[PA_CHANNEL_POSITION_AUX22] = N_("Auxiliary 22"),
[PA_CHANNEL_POSITION_AUX23] = N_("Auxiliary 23"),
[PA_CHANNEL_POSITION_AUX24] = N_("Auxiliary 24"),
[PA_CHANNEL_POSITION_AUX25] = N_("Auxiliary 25"),
[PA_CHANNEL_POSITION_AUX26] = N_("Auxiliary 26"),
[PA_CHANNEL_POSITION_AUX27] = N_("Auxiliary 27"),
[PA_CHANNEL_POSITION_AUX28] = N_("Auxiliary 28"),
[PA_CHANNEL_POSITION_AUX29] = N_("Auxiliary 29"),
[PA_CHANNEL_POSITION_AUX30] = N_("Auxiliary 30"),
[PA_CHANNEL_POSITION_AUX31] = N_("Auxiliary 31"),
[PA_CHANNEL_POSITION_TOP_CENTER] = N_("Top Center"),
[PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = N_("Top Front Center"),
[PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = N_("Top Front Left"),
[PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = N_("Top Front Right"),
[PA_CHANNEL_POSITION_TOP_REAR_CENTER] = N_("Top Rear Center"),
[PA_CHANNEL_POSITION_TOP_REAR_LEFT] = N_("Top Rear Left"),
[PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = N_("Top Rear Right")
};
pa_channel_map* pa_channel_map_init(pa_channel_map *m) {
unsigned c;
pa_assert(m);
m->channels = 0;
for (c = 0; c < PA_CHANNELS_MAX; c++)
m->map[c] = PA_CHANNEL_POSITION_INVALID;
return m;
}
pa_channel_map* pa_channel_map_init_mono(pa_channel_map *m) {
pa_assert(m);
pa_channel_map_init(m);
m->channels = 1;
m->map[0] = PA_CHANNEL_POSITION_MONO;
return m;
}
pa_channel_map* pa_channel_map_init_stereo(pa_channel_map *m) {
pa_assert(m);
pa_channel_map_init(m);
m->channels = 2;
m->map[0] = PA_CHANNEL_POSITION_LEFT;
m->map[1] = PA_CHANNEL_POSITION_RIGHT;
return m;
}
pa_channel_map* pa_channel_map_init_auto(pa_channel_map *m, unsigned channels, pa_channel_map_def_t def) {
pa_assert(m);
pa_assert(channels > 0);
pa_assert(channels <= PA_CHANNELS_MAX);
pa_assert(def < PA_CHANNEL_MAP_DEF_MAX);
pa_channel_map_init(m);
m->channels = (uint8_t) channels;
switch (def) {
case PA_CHANNEL_MAP_AIFF:
/* This is somewhat compatible with RFC3551 */
switch (channels) {
case 1:
m->map[0] = PA_CHANNEL_POSITION_MONO;
return m;
case 6:
m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
m->map[1] = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
m->map[3] = PA_CHANNEL_POSITION_FRONT_RIGHT;
m->map[4] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
m->map[5] = PA_CHANNEL_POSITION_REAR_CENTER;
return m;
case 5:
m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
m->map[3] = PA_CHANNEL_POSITION_REAR_LEFT;
m->map[4] = PA_CHANNEL_POSITION_REAR_RIGHT;
/* Fall through */
case 2:
m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
return m;
case 3:
m->map[0] = PA_CHANNEL_POSITION_LEFT;
m->map[1] = PA_CHANNEL_POSITION_RIGHT;
m->map[2] = PA_CHANNEL_POSITION_CENTER;
return m;
case 4:
m->map[0] = PA_CHANNEL_POSITION_LEFT;
m->map[1] = PA_CHANNEL_POSITION_CENTER;
m->map[2] = PA_CHANNEL_POSITION_RIGHT;
m->map[3] = PA_CHANNEL_POSITION_REAR_CENTER;
return m;
default:
return NULL;
}
case PA_CHANNEL_MAP_ALSA:
switch (channels) {
case 1:
m->map[0] = PA_CHANNEL_POSITION_MONO;
return m;
case 8:
m->map[6] = PA_CHANNEL_POSITION_SIDE_LEFT;
m->map[7] = PA_CHANNEL_POSITION_SIDE_RIGHT;
/* Fall through */
case 6:
m->map[5] = PA_CHANNEL_POSITION_LFE;
/* Fall through */
case 5:
m->map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
/* Fall through */
case 4:
m->map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
m->map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
/* Fall through */
case 2:
m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
return m;
default:
return NULL;
}
case PA_CHANNEL_MAP_AUX: {
unsigned i;
for (i = 0; i < channels; i++)
m->map[i] = PA_CHANNEL_POSITION_AUX0 + i;
return m;
}
case PA_CHANNEL_MAP_WAVEEX:
/* Following http://www.microsoft.com/whdc/device/audio/multichaud.mspx#EKLAC */
switch (channels) {
case 1:
m->map[0] = PA_CHANNEL_POSITION_MONO;
return m;
case 18:
m->map[15] = PA_CHANNEL_POSITION_TOP_REAR_LEFT;
m->map[16] = PA_CHANNEL_POSITION_TOP_REAR_CENTER;
m->map[17] = PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
/* Fall through */
case 15:
m->map[12] = PA_CHANNEL_POSITION_TOP_FRONT_LEFT;
m->map[13] = PA_CHANNEL_POSITION_TOP_FRONT_CENTER;
m->map[14] = PA_CHANNEL_POSITION_TOP_FRONT_RIGHT;
/* Fall through */
case 12:
m->map[11] = PA_CHANNEL_POSITION_TOP_CENTER;
/* Fall through */
case 11:
m->map[9] = PA_CHANNEL_POSITION_SIDE_LEFT;
m->map[10] = PA_CHANNEL_POSITION_SIDE_RIGHT;
/* Fall through */
case 9:
m->map[8] = PA_CHANNEL_POSITION_REAR_CENTER;
/* Fall through */
case 8:
m->map[6] = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
m->map[7] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
/* Fall through */
case 6:
m->map[4] = PA_CHANNEL_POSITION_REAR_LEFT;
m->map[5] = PA_CHANNEL_POSITION_REAR_RIGHT;
/* Fall through */
case 4:
m->map[3] = PA_CHANNEL_POSITION_LFE;
/* Fall through */
case 3:
m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
/* Fall through */
case 2:
m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
return m;
default:
return NULL;
}
case PA_CHANNEL_MAP_OSS:
switch (channels) {
case 1:
m->map[0] = PA_CHANNEL_POSITION_MONO;
return m;
case 8:
m->map[6] = PA_CHANNEL_POSITION_REAR_LEFT;
m->map[7] = PA_CHANNEL_POSITION_REAR_RIGHT;
/* Fall through */
case 6:
m->map[4] = PA_CHANNEL_POSITION_SIDE_LEFT;
m->map[5] = PA_CHANNEL_POSITION_SIDE_RIGHT;
/* Fall through */
case 4:
m->map[3] = PA_CHANNEL_POSITION_LFE;
/* Fall through */
case 3:
m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
/* Fall through */
case 2:
m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
return m;
default:
return NULL;
}
default:
pa_assert_not_reached();
}
}
pa_channel_map* pa_channel_map_init_extend(pa_channel_map *m, unsigned channels, pa_channel_map_def_t def) {
unsigned c;
pa_assert(m);
pa_assert(channels > 0);
pa_assert(channels <= PA_CHANNELS_MAX);
pa_assert(def < PA_CHANNEL_MAP_DEF_MAX);
pa_channel_map_init(m);
for (c = channels; c > 0; c--) {
if (pa_channel_map_init_auto(m, c, def)) {
unsigned i = 0;
for (; c < channels; c++) {
m->map[c] = PA_CHANNEL_POSITION_AUX0 + i;
i++;
}
m->channels = (uint8_t) channels;
return m;
}
}
return NULL;
}
const char* pa_channel_position_to_string(pa_channel_position_t pos) {
if (pos < 0 || pos >= PA_CHANNEL_POSITION_MAX)
return NULL;
return table[pos];
}
const char* pa_channel_position_to_pretty_string(pa_channel_position_t pos) {
if (pos < 0 || pos >= PA_CHANNEL_POSITION_MAX)
return NULL;
pa_init_i18n();
return _(pretty_table[pos]);
}
int pa_channel_map_equal(const pa_channel_map *a, const pa_channel_map *b) {
unsigned c;
pa_assert(a);
pa_assert(b);
pa_return_val_if_fail(pa_channel_map_valid(a), 0);
if (PA_UNLIKELY(a == b))
return 1;
pa_return_val_if_fail(pa_channel_map_valid(b), 0);
if (a->channels != b->channels)
return 0;
for (c = 0; c < a->channels; c++)
if (a->map[c] != b->map[c])
return 0;
return 1;
}
char* pa_channel_map_snprint(char *s, size_t l, const pa_channel_map *map) {
unsigned channel;
pa_bool_t first = TRUE;
char *e;
pa_assert(s);
pa_assert(l > 0);
pa_assert(map);
pa_init_i18n();
if (!pa_channel_map_valid(map)) {
pa_snprintf(s, l, _("(invalid)"));
return s;
}
*(e = s) = 0;
for (channel = 0; channel < map->channels && l > 1; channel++) {
l -= pa_snprintf(e, l, "%s%s",
first ? "" : ",",
pa_channel_position_to_string(map->map[channel]));
e = strchr(e, 0);
first = FALSE;
}
return s;
}
pa_channel_position_t pa_channel_position_from_string(const char *p) {
pa_channel_position_t i;
pa_assert(p);
/* Some special aliases */
if (pa_streq(p, "left"))
return PA_CHANNEL_POSITION_LEFT;
else if (pa_streq(p, "right"))
return PA_CHANNEL_POSITION_RIGHT;
else if (pa_streq(p, "center"))
return PA_CHANNEL_POSITION_CENTER;
else if (pa_streq(p, "subwoofer"))
return PA_CHANNEL_POSITION_SUBWOOFER;
for (i = 0; i < PA_CHANNEL_POSITION_MAX; i++)
if (pa_streq(p, table[i]))
return i;
return PA_CHANNEL_POSITION_INVALID;
}
pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s) {
const char *state;
pa_channel_map map;
char *p;
pa_assert(rmap);
pa_assert(s);
pa_channel_map_init(&map);
/* We don't need to match against the well known channel mapping
* "mono" here explicitly, because that can be understood as
* listing with one channel called "mono". */
if (pa_streq(s, "stereo")) {
map.channels = 2;
map.map[0] = PA_CHANNEL_POSITION_LEFT;
map.map[1] = PA_CHANNEL_POSITION_RIGHT;
goto finish;
} else if (pa_streq(s, "surround-40")) {
map.channels = 4;
map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
goto finish;
} else if (pa_streq(s, "surround-41")) {
map.channels = 5;
map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
map.map[4] = PA_CHANNEL_POSITION_LFE;
goto finish;
} else if (pa_streq(s, "surround-50")) {
map.channels = 5;
map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
map.map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
goto finish;
} else if (pa_streq(s, "surround-51")) {
map.channels = 6;
map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
map.map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
map.map[5] = PA_CHANNEL_POSITION_LFE;
goto finish;
} else if (pa_streq(s, "surround-71")) {
map.channels = 8;
map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
map.map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
map.map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
map.map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
map.map[5] = PA_CHANNEL_POSITION_LFE;
map.map[6] = PA_CHANNEL_POSITION_SIDE_LEFT;
map.map[7] = PA_CHANNEL_POSITION_SIDE_RIGHT;
goto finish;
}
state = NULL;
map.channels = 0;
while ((p = pa_split(s, ",", &state))) {
pa_channel_position_t f;
if (map.channels >= PA_CHANNELS_MAX) {
pa_xfree(p);
return NULL;
}
if ((f = pa_channel_position_from_string(p)) == PA_CHANNEL_POSITION_INVALID) {
pa_xfree(p);
return NULL;
}
map.map[map.channels++] = f;
pa_xfree(p);
}
finish:
if (!pa_channel_map_valid(&map))
return NULL;
*rmap = map;
return rmap;
}
int pa_channel_map_valid(const pa_channel_map *map) {
unsigned c;
pa_assert(map);
if (map->channels <= 0 || map->channels > PA_CHANNELS_MAX)
return 0;
for (c = 0; c < map->channels; c++)
if (map->map[c] < 0 || map->map[c] >= PA_CHANNEL_POSITION_MAX)
return 0;
return 1;
}
int pa_channel_map_compatible(const pa_channel_map *map, const pa_sample_spec *ss) {
pa_assert(map);
pa_assert(ss);
pa_return_val_if_fail(pa_channel_map_valid(map), 0);
pa_return_val_if_fail(pa_sample_spec_valid(ss), 0);
return map->channels == ss->channels;
}
int pa_channel_map_superset(const pa_channel_map *a, const pa_channel_map *b) {
pa_channel_position_mask_t am, bm;
pa_assert(a);
pa_assert(b);
pa_return_val_if_fail(pa_channel_map_valid(a), 0);
if (PA_UNLIKELY(a == b))
return 1;
pa_return_val_if_fail(pa_channel_map_valid(b), 0);
am = pa_channel_map_mask(a);
bm = pa_channel_map_mask(b);
return (bm & am) == bm;
}
int pa_channel_map_can_balance(const pa_channel_map *map) {
pa_channel_position_mask_t m;
pa_assert(map);
pa_return_val_if_fail(pa_channel_map_valid(map), 0);
m = pa_channel_map_mask(map);
return
(PA_CHANNEL_POSITION_MASK_LEFT & m) &&
(PA_CHANNEL_POSITION_MASK_RIGHT & m);
}
int pa_channel_map_can_fade(const pa_channel_map *map) {
pa_channel_position_mask_t m;
pa_assert(map);
pa_return_val_if_fail(pa_channel_map_valid(map), 0);
m = pa_channel_map_mask(map);
return
(PA_CHANNEL_POSITION_MASK_FRONT & m) &&
(PA_CHANNEL_POSITION_MASK_REAR & m);
}
const char* pa_channel_map_to_name(const pa_channel_map *map) {
pa_bitset_t in_map[PA_BITSET_ELEMENTS(PA_CHANNEL_POSITION_MAX)];
unsigned c;
pa_assert(map);
pa_return_val_if_fail(pa_channel_map_valid(map), NULL);
memset(in_map, 0, sizeof(in_map));
for (c = 0; c < map->channels; c++)
pa_bitset_set(in_map, map->map[c], TRUE);
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_MONO, -1))
return "mono";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, -1))
return "stereo";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, -1))
return "surround-40";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_LFE, -1))
return "surround-41";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, -1))
return "surround-50";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE, -1))
return "surround-51";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT, -1))
return "surround-71";
return NULL;
}
const char* pa_channel_map_to_pretty_name(const pa_channel_map *map) {
pa_bitset_t in_map[PA_BITSET_ELEMENTS(PA_CHANNEL_POSITION_MAX)];
unsigned c;
pa_assert(map);
pa_return_val_if_fail(pa_channel_map_valid(map), NULL);
memset(in_map, 0, sizeof(in_map));
for (c = 0; c < map->channels; c++)
pa_bitset_set(in_map, map->map[c], TRUE);
pa_init_i18n();
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_MONO, -1))
return _("Mono");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, -1))
return _("Stereo");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, -1))
return _("Surround 4.0");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_LFE, -1))
return _("Surround 4.1");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, -1))
return _("Surround 5.0");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE, -1))
return _("Surround 5.1");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT, -1))
return _("Surround 7.1");
return NULL;
}
int pa_channel_map_has_position(const pa_channel_map *map, pa_channel_position_t p) {
unsigned c;
pa_return_val_if_fail(pa_channel_map_valid(map), 0);
pa_return_val_if_fail(p < PA_CHANNEL_POSITION_MAX, 0);
for (c = 0; c < map->channels; c++)
if (map->map[c] == p)
return 1;
return 0;
}
pa_channel_position_mask_t pa_channel_map_mask(const pa_channel_map *map) {
unsigned c;
pa_channel_position_mask_t r = 0;
pa_return_val_if_fail(pa_channel_map_valid(map), 0);
for (c = 0; c < map->channels; c++)
r |= PA_CHANNEL_POSITION_MASK(map->map[c]);
return r;
}
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