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/*
* Copyright 2011-2013 Various Authors
* Copyright 2011 Johannes Weißl
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program 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 General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "channelmap.h"
#include "utils.h"
void channel_map_init_waveex(int channels, unsigned int mask, channel_position_t *map)
{
/* http://www.microsoft.com/whdc/device/audio/multichaud.mspx#EMLAC */
const channel_position_t channel_map_waveex[] = {
CHANNEL_POSITION_FRONT_LEFT,
CHANNEL_POSITION_FRONT_RIGHT,
CHANNEL_POSITION_FRONT_CENTER,
CHANNEL_POSITION_LFE,
CHANNEL_POSITION_REAR_LEFT,
CHANNEL_POSITION_REAR_RIGHT,
CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER,
CHANNEL_POSITION_REAR_CENTER,
CHANNEL_POSITION_SIDE_LEFT,
CHANNEL_POSITION_SIDE_RIGHT,
CHANNEL_POSITION_TOP_CENTER,
CHANNEL_POSITION_TOP_FRONT_LEFT,
CHANNEL_POSITION_TOP_FRONT_CENTER,
CHANNEL_POSITION_TOP_FRONT_RIGHT,
CHANNEL_POSITION_TOP_REAR_LEFT,
CHANNEL_POSITION_TOP_REAR_CENTER,
CHANNEL_POSITION_TOP_REAR_RIGHT
};
if (channels == 1) {
map[0] = CHANNEL_POSITION_MONO;
} else if (channels > 1 && channels < N_ELEMENTS(channel_map_waveex)) {
int i, j = 0;
if (!mask)
mask = (1 << channels) - 1;
for (i = 0; i < N_ELEMENTS(channel_map_waveex); i++) {
if (mask & (1 << i))
map[j++] = channel_map_waveex[i];
}
if (j != channels)
map[0] = CHANNEL_POSITION_INVALID;
} else {
map[0] = CHANNEL_POSITION_INVALID;
}
}
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