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pipewire/pipewire-pulseaudio/src/channelmap.c
Jan Grulich 743cf58fb7 Define SPA_FALLTHROUGH to make fall-through annotations work for all compilers 
This is needed for example for Clang compiler which uses different
annotations than GCC. It will make WebRTC to happily use PipeWire
since the spa library is header-only and WebRTC defaults to use
Clang with -Wimplicit-fallthrough.
2020-10-22 13:31:19 +02:00

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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, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <pulse/xmalloc.h>
#include <pulse/channelmap.h>
#include "internal.h"
#include "bitset.h"
#include "sample-util.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")
};
SPA_EXPORT
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;
}
SPA_EXPORT
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;
}
SPA_EXPORT
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;
}
SPA_EXPORT
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(pa_channels_valid(channels));
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;
SPA_FALLTHROUGH
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;
SPA_FALLTHROUGH
case 6:
m->map[5] = PA_CHANNEL_POSITION_LFE;
SPA_FALLTHROUGH
case 5:
m->map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
SPA_FALLTHROUGH
case 4:
m->map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
m->map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
SPA_FALLTHROUGH
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;
SPA_FALLTHROUGH
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;
SPA_FALLTHROUGH
case 12:
m->map[11] = PA_CHANNEL_POSITION_TOP_CENTER;
SPA_FALLTHROUGH
case 11:
m->map[9] = PA_CHANNEL_POSITION_SIDE_LEFT;
m->map[10] = PA_CHANNEL_POSITION_SIDE_RIGHT;
SPA_FALLTHROUGH
case 9:
m->map[8] = PA_CHANNEL_POSITION_REAR_CENTER;
SPA_FALLTHROUGH
case 8:
m->map[6] = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
m->map[7] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
SPA_FALLTHROUGH
case 6:
m->map[4] = PA_CHANNEL_POSITION_REAR_LEFT;
m->map[5] = PA_CHANNEL_POSITION_REAR_RIGHT;
SPA_FALLTHROUGH
case 4:
m->map[3] = PA_CHANNEL_POSITION_LFE;
SPA_FALLTHROUGH
case 3:
m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
SPA_FALLTHROUGH
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;
SPA_FALLTHROUGH
case 6:
m->map[4] = PA_CHANNEL_POSITION_SIDE_LEFT;
m->map[5] = PA_CHANNEL_POSITION_SIDE_RIGHT;
SPA_FALLTHROUGH
case 4:
m->map[3] = PA_CHANNEL_POSITION_LFE;
SPA_FALLTHROUGH
case 3:
m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
SPA_FALLTHROUGH
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();
}
}
SPA_EXPORT
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(pa_channels_valid(channels));
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;
}
SPA_EXPORT
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];
}
SPA_EXPORT
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]);
}
SPA_EXPORT
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;
}
SPA_EXPORT
char* pa_channel_map_snprint(char *s, size_t l, const pa_channel_map *map) {
unsigned channel;
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",
channel == 0 ? "" : ",",
pa_channel_position_to_string(map->map[channel]));
e = strchr(e, 0);
}
return s;
}
SPA_EXPORT
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;
}
SPA_EXPORT
pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s) {
pa_channel_map map;
char **tokens;
int i, n_tokens;
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-21")) {
map.channels = 3;
map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
map.map[2] = PA_CHANNEL_POSITION_LFE;
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;
}
map.channels = 0;
tokens = pw_split_strv(s, ",", INT_MAX, &n_tokens);
for (i = 0; i < n_tokens; i++) {
pa_channel_position_t f;
if (map.channels >= PA_CHANNELS_MAX) {
pw_free_strv(tokens);
return NULL;
}
if ((f = pa_channel_position_from_string(tokens[i])) == PA_CHANNEL_POSITION_INVALID) {
pw_free_strv(tokens);
return NULL;
}
map.map[map.channels++] = f;
}
pw_free_strv(tokens);
finish:
if (!pa_channel_map_valid(&map))
return NULL;
*rmap = map;
return rmap;
}
SPA_EXPORT
int pa_channel_map_valid(const pa_channel_map *map) {
unsigned c;
pa_assert(map);
if (!pa_channels_valid(map->channels))
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;
}
SPA_EXPORT
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;
}
SPA_EXPORT
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;
}
SPA_EXPORT
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);
}
SPA_EXPORT
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);
}
SPA_EXPORT
int pa_channel_map_can_lfe_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_LFE & m) &&
(PA_CHANNEL_POSITION_MASK_HFE & m);
}
SPA_EXPORT
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;
}
SPA_EXPORT
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;
}
SPA_EXPORT
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;
}
SPA_EXPORT
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;
}
static const uint32_t audio_channels[] = {
[PA_CHANNEL_POSITION_MONO] = SPA_AUDIO_CHANNEL_MONO,
[PA_CHANNEL_POSITION_FRONT_LEFT] = SPA_AUDIO_CHANNEL_FL,
[PA_CHANNEL_POSITION_FRONT_RIGHT] = SPA_AUDIO_CHANNEL_FR,
[PA_CHANNEL_POSITION_FRONT_CENTER] = SPA_AUDIO_CHANNEL_FC,
[PA_CHANNEL_POSITION_REAR_CENTER] = SPA_AUDIO_CHANNEL_RC,
[PA_CHANNEL_POSITION_REAR_LEFT] = SPA_AUDIO_CHANNEL_RL,
[PA_CHANNEL_POSITION_REAR_RIGHT] = SPA_AUDIO_CHANNEL_RR,
[PA_CHANNEL_POSITION_LFE] = SPA_AUDIO_CHANNEL_LFE,
[PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = SPA_AUDIO_CHANNEL_FLC,
[PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = SPA_AUDIO_CHANNEL_FRC,
[PA_CHANNEL_POSITION_SIDE_LEFT] = SPA_AUDIO_CHANNEL_SL,
[PA_CHANNEL_POSITION_SIDE_RIGHT] = SPA_AUDIO_CHANNEL_SR,
[PA_CHANNEL_POSITION_AUX0] = SPA_AUDIO_CHANNEL_CUSTOM_START + 1,
[PA_CHANNEL_POSITION_AUX1] = SPA_AUDIO_CHANNEL_CUSTOM_START + 2,
[PA_CHANNEL_POSITION_AUX2] = SPA_AUDIO_CHANNEL_CUSTOM_START + 3,
[PA_CHANNEL_POSITION_AUX3] = SPA_AUDIO_CHANNEL_CUSTOM_START + 4,
[PA_CHANNEL_POSITION_AUX4] = SPA_AUDIO_CHANNEL_CUSTOM_START + 5,
[PA_CHANNEL_POSITION_AUX5] = SPA_AUDIO_CHANNEL_CUSTOM_START + 6,
[PA_CHANNEL_POSITION_AUX6] = SPA_AUDIO_CHANNEL_CUSTOM_START + 7,
[PA_CHANNEL_POSITION_AUX7] = SPA_AUDIO_CHANNEL_CUSTOM_START + 8,
[PA_CHANNEL_POSITION_AUX8] = SPA_AUDIO_CHANNEL_CUSTOM_START + 9,
[PA_CHANNEL_POSITION_AUX9] = SPA_AUDIO_CHANNEL_CUSTOM_START + 10,
[PA_CHANNEL_POSITION_AUX10] = SPA_AUDIO_CHANNEL_CUSTOM_START + 11,
[PA_CHANNEL_POSITION_AUX11] = SPA_AUDIO_CHANNEL_CUSTOM_START + 12,
[PA_CHANNEL_POSITION_AUX12] = SPA_AUDIO_CHANNEL_CUSTOM_START + 13,
[PA_CHANNEL_POSITION_AUX13] = SPA_AUDIO_CHANNEL_CUSTOM_START + 14,
[PA_CHANNEL_POSITION_AUX14] = SPA_AUDIO_CHANNEL_CUSTOM_START + 15,
[PA_CHANNEL_POSITION_AUX15] = SPA_AUDIO_CHANNEL_CUSTOM_START + 16,
[PA_CHANNEL_POSITION_AUX16] = SPA_AUDIO_CHANNEL_CUSTOM_START + 17,
[PA_CHANNEL_POSITION_AUX17] = SPA_AUDIO_CHANNEL_CUSTOM_START + 18,
[PA_CHANNEL_POSITION_AUX18] = SPA_AUDIO_CHANNEL_CUSTOM_START + 19,
[PA_CHANNEL_POSITION_AUX19] = SPA_AUDIO_CHANNEL_CUSTOM_START + 20,
[PA_CHANNEL_POSITION_AUX20] = SPA_AUDIO_CHANNEL_CUSTOM_START + 21,
[PA_CHANNEL_POSITION_AUX21] = SPA_AUDIO_CHANNEL_CUSTOM_START + 22,
[PA_CHANNEL_POSITION_AUX22] = SPA_AUDIO_CHANNEL_CUSTOM_START + 23,
[PA_CHANNEL_POSITION_AUX23] = SPA_AUDIO_CHANNEL_CUSTOM_START + 24,
[PA_CHANNEL_POSITION_AUX24] = SPA_AUDIO_CHANNEL_CUSTOM_START + 25,
[PA_CHANNEL_POSITION_AUX25] = SPA_AUDIO_CHANNEL_CUSTOM_START + 26,
[PA_CHANNEL_POSITION_AUX26] = SPA_AUDIO_CHANNEL_CUSTOM_START + 27,
[PA_CHANNEL_POSITION_AUX27] = SPA_AUDIO_CHANNEL_CUSTOM_START + 28,
[PA_CHANNEL_POSITION_AUX28] = SPA_AUDIO_CHANNEL_CUSTOM_START + 29,
[PA_CHANNEL_POSITION_AUX29] = SPA_AUDIO_CHANNEL_CUSTOM_START + 30,
[PA_CHANNEL_POSITION_AUX30] = SPA_AUDIO_CHANNEL_CUSTOM_START + 31,
[PA_CHANNEL_POSITION_AUX31] = SPA_AUDIO_CHANNEL_CUSTOM_START + 32,
[PA_CHANNEL_POSITION_TOP_CENTER] = SPA_AUDIO_CHANNEL_TC,
[PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = SPA_AUDIO_CHANNEL_TFL,
[PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = SPA_AUDIO_CHANNEL_TFR,
[PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = SPA_AUDIO_CHANNEL_TFC,
[PA_CHANNEL_POSITION_TOP_REAR_LEFT] = SPA_AUDIO_CHANNEL_TRL,
[PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = SPA_AUDIO_CHANNEL_TRR,
[PA_CHANNEL_POSITION_TOP_REAR_CENTER] = SPA_AUDIO_CHANNEL_TRC,
};
static inline uint32_t channel_pa2id(pa_channel_position_t channel)
{
if (channel < 0 || (size_t)channel >= SPA_N_ELEMENTS(audio_channels))
return SPA_AUDIO_CHANNEL_UNKNOWN;
return audio_channels[channel];
}
static inline pa_channel_position_t channel_id2pa(uint32_t id, uint32_t *aux)
{
size_t i;
for (i = 0; i < SPA_N_ELEMENTS(audio_channels); i++) {
if (id == audio_channels[i])
return i;
}
return PA_CHANNEL_POSITION_AUX0 + (*aux)++;
}
void pw_channel_map_from_positions(pa_channel_map *map, uint32_t n_pos, const uint32_t *pos)
{
uint32_t i, aux = 0;
pa_channel_map_init(map);
map->channels = n_pos;
for (i = 0; i < n_pos; i++)
map->map[i] = channel_id2pa(pos[i], &aux);
if (!pa_channel_map_valid(map))
pa_channel_map_init_extend(map, n_pos, PA_CHANNEL_MAP_DEFAULT);
}
void pw_channel_map_to_positions(const pa_channel_map *map, uint32_t *pos)
{
int i;
for (i = 0; i < map->channels; i++)
pos[i] = channel_pa2id(map->map[i]);
}
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