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/* $Id$ */
/***
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 <stdlib.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include "channelmap.h"
pa_channel_map* pa_channel_map_init(pa_channel_map *m) {
unsigned c;
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) {
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) {
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) {
assert(m);
assert(channels > 0);
assert(channels <= PA_CHANNELS_MAX);
pa_channel_map_init(m);
m->channels = channels;
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;
}
}
const char* pa_channel_position_to_string(pa_channel_position_t pos) {
const char *const table[] = {
[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_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"
};
if (pos < 0 || pos >= PA_CHANNEL_POSITION_MAX)
return NULL;
return table[pos];
}
int pa_channel_map_equal(const pa_channel_map *a, const pa_channel_map *b) {
unsigned c;
assert(a);
assert(b);
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;
int first = 1;
char *e;
assert(s);
assert(l > 0);
assert(map);
*(e = s) = 0;
for (channel = 0; channel < map->channels && l > 1; channel++) {
l -= snprintf(e, l, "%s%u:%s",
first ? "" : " ",
channel,
pa_channel_position_to_string(map->map[channel]));
e = strchr(e, 0);
first = 0;
}
return s;
}
int pa_channel_map_valid(const pa_channel_map *map) {
unsigned c;
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;
}
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