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channelmap.h
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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/>.
*/
#ifndef _CHANNELMAP_H
#define _CHANNELMAP_H
#include <string.h>
#define CHANNELS_MAX 32
/* Modelled after PulseAudio */
enum channel_position {
CHANNEL_POSITION_INVALID = -1,
CHANNEL_POSITION_MONO = 0,
CHANNEL_POSITION_FRONT_LEFT,
CHANNEL_POSITION_FRONT_RIGHT,
CHANNEL_POSITION_FRONT_CENTER,
CHANNEL_POSITION_LEFT = CHANNEL_POSITION_FRONT_LEFT,
CHANNEL_POSITION_RIGHT = CHANNEL_POSITION_FRONT_RIGHT,
CHANNEL_POSITION_CENTER = CHANNEL_POSITION_FRONT_CENTER,
CHANNEL_POSITION_REAR_CENTER,
CHANNEL_POSITION_REAR_LEFT,
CHANNEL_POSITION_REAR_RIGHT,
CHANNEL_POSITION_LFE,
CHANNEL_POSITION_SUBWOOFER = CHANNEL_POSITION_LFE,
CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER,
CHANNEL_POSITION_SIDE_LEFT,
CHANNEL_POSITION_SIDE_RIGHT,
CHANNEL_POSITION_TOP_CENTER,
CHANNEL_POSITION_TOP_FRONT_LEFT,
CHANNEL_POSITION_TOP_FRONT_RIGHT,
CHANNEL_POSITION_TOP_FRONT_CENTER,
CHANNEL_POSITION_TOP_REAR_LEFT,
CHANNEL_POSITION_TOP_REAR_RIGHT,
CHANNEL_POSITION_TOP_REAR_CENTER,
CHANNEL_POSITION_MAX
};
typedef enum channel_position channel_position_t;
#define CHANNEL_MAP_INIT { CHANNEL_POSITION_INVALID }
#define CHANNEL_MAP(name) \
channel_position_t name[CHANNELS_MAX] = CHANNEL_MAP_INIT
static inline int channel_map_valid(const channel_position_t *map)
{
return map[0] != CHANNEL_POSITION_INVALID;
}
static inline int channel_map_equal(const channel_position_t *a, const channel_position_t *b, int channels)
{
return memcmp(a, b, sizeof(*a) * channels) == 0;
}
static inline channel_position_t *channel_map_copy(channel_position_t *dst, const channel_position_t *src)
{
return memcpy(dst, src, sizeof(*dst) * CHANNELS_MAX);
}
static inline void channel_map_init_stereo(channel_position_t *map)
{
map[0] = CHANNEL_POSITION_LEFT;
map[1] = CHANNEL_POSITION_RIGHT;
}
void channel_map_init_waveex(int channels, unsigned int mask, channel_position_t *map);
#endif