mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-03 09:01:50 -05:00
e1f008f2a3
git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/liboil-test@344 fefdeb5f-60dc-0310-8127-8f9354f1896f
140 lines
3.7 KiB
C
140 lines
3.7 KiB
C
/* $Id$ */
|
|
|
|
/***
|
|
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 "channelmap.h"
|
|
|
|
|
|
struct pa_channel_map* pa_channel_map_init(struct pa_channel_map *m) {
|
|
unsigned c;
|
|
assert(m);
|
|
|
|
for (c = 0; c < PA_CHANNELS_MAX; c++)
|
|
m->map[c] = PA_CHANNEL_POSITION_INVALID;
|
|
|
|
return m;
|
|
}
|
|
|
|
struct pa_channel_map* pa_channel_map_init_mono(struct pa_channel_map *m) {
|
|
assert(m);
|
|
|
|
pa_channel_map_init(m);
|
|
m->map[0] = PA_CHANNEL_POSITION_MONO;
|
|
return m;
|
|
}
|
|
|
|
struct pa_channel_map* pa_channel_map_init_stereo(struct pa_channel_map *m) {
|
|
assert(m);
|
|
|
|
pa_channel_map_init(m);
|
|
m->map[0] = PA_CHANNEL_POSITION_LEFT;
|
|
m->map[1] = PA_CHANNEL_POSITION_RIGHT;
|
|
return m;
|
|
}
|
|
|
|
struct pa_channel_map* pa_channel_map_init_auto(struct pa_channel_map *m, int channels) {
|
|
assert(m);
|
|
assert(channels > 0);
|
|
|
|
pa_channel_map_init(m);
|
|
|
|
switch (channels) {
|
|
case 1:
|
|
m->map[0] = PA_CHANNEL_POSITION_MONO;
|
|
return m;
|
|
|
|
case 8:
|
|
m->mpa[6] = PA_CHANNEL_POSITION_SIDE_LEFT;
|
|
m->mpa[7] = PA_CHANNEL_POSITION_SIDE_RIGHT;
|
|
/* Fall through */
|
|
|
|
case 6:
|
|
m->mpa[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_MAP_FRONT_LEFT;
|
|
m->map[1] = PA_CHANNEL_MAP_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"
|
|
};
|
|
|
|
if (pos < 0 || pos >= PA_CHANNEL_POSITION_MAX)
|
|
return NULL;
|
|
|
|
return table[pos];
|
|
}
|
|
|
|
int pa_channel_map_equal(struct pa_channel_map *a, struct pa_channel_map *b, int channels) {
|
|
char c;
|
|
|
|
assert(a);
|
|
assert(b);
|
|
assert(channels > 0);
|
|
|
|
if (channels > PA_CHANNELS_MAX)
|
|
channels = PA_CHANNELS_MAX;
|
|
|
|
for (c = 0; c < channels; c++)
|
|
if (a->map[c] != b->map[c])
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|