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/* $Id: channelmap.c 1033 2006-06-19 21:53:48Z lennart $ */
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This file is part of PulseAudio.
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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#include <pulse/xmalloc.h>
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#include <pulsecore/core-util.h>
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#include "channelmap.h"
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const char *const table[] = {
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[PA_CHANNEL_POSITION_MONO] = "mono",
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[PA_CHANNEL_POSITION_FRONT_CENTER] = "front-center",
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[PA_CHANNEL_POSITION_FRONT_LEFT] = "front-left",
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[PA_CHANNEL_POSITION_FRONT_RIGHT] = "front-right",
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[PA_CHANNEL_POSITION_REAR_CENTER] = "rear-center",
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[PA_CHANNEL_POSITION_REAR_LEFT] = "rear-left",
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[PA_CHANNEL_POSITION_REAR_RIGHT] = "rear-right",
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[PA_CHANNEL_POSITION_LFE] = "lfe",
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[PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] = "front-left-of-center",
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[PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = "front-right-of-center",
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[PA_CHANNEL_POSITION_SIDE_LEFT] = "side-left",
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[PA_CHANNEL_POSITION_SIDE_RIGHT] = "side-right",
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[PA_CHANNEL_POSITION_AUX0] = "aux0",
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[PA_CHANNEL_POSITION_AUX1] = "aux1",
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[PA_CHANNEL_POSITION_AUX2] = "aux2",
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[PA_CHANNEL_POSITION_AUX3] = "aux3",
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[PA_CHANNEL_POSITION_AUX4] = "aux4",
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[PA_CHANNEL_POSITION_AUX5] = "aux5",
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[PA_CHANNEL_POSITION_AUX6] = "aux6",
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[PA_CHANNEL_POSITION_AUX7] = "aux7",
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[PA_CHANNEL_POSITION_AUX8] = "aux8",
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[PA_CHANNEL_POSITION_AUX9] = "aux9",
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[PA_CHANNEL_POSITION_AUX10] = "aux10",
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[PA_CHANNEL_POSITION_AUX11] = "aux11",
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[PA_CHANNEL_POSITION_AUX12] = "aux12",
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[PA_CHANNEL_POSITION_AUX13] = "aux13",
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[PA_CHANNEL_POSITION_AUX14] = "aux14",
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[PA_CHANNEL_POSITION_AUX15] = "aux15",
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[PA_CHANNEL_POSITION_TOP_CENTER] = "top-center",
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[PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = "top-front-left",
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[PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = "top-front-right",
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[PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = "top-front-center",
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[PA_CHANNEL_POSITION_TOP_REAR_LEFT] = "top-rear-left",
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[PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = "top-rear-right",
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[PA_CHANNEL_POSITION_TOP_REAR_CENTER] = "top-rear-center"
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pa_channel_map* pa_channel_map_init(pa_channel_map *m) {
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for (c = 0; c < PA_CHANNELS_MAX; c++)
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m->map[c] = PA_CHANNEL_POSITION_INVALID;
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pa_channel_map* pa_channel_map_init_mono(pa_channel_map *m) {
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pa_channel_map_init(m);
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m->map[0] = PA_CHANNEL_POSITION_MONO;
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pa_channel_map* pa_channel_map_init_stereo(pa_channel_map *m) {
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pa_channel_map_init(m);
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m->map[0] = PA_CHANNEL_POSITION_LEFT;
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m->map[1] = PA_CHANNEL_POSITION_RIGHT;
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pa_channel_map* pa_channel_map_init_auto(pa_channel_map *m, unsigned channels, pa_channel_map_def_t def) {
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assert(channels > 0);
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assert(channels <= PA_CHANNELS_MAX);
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pa_channel_map_init(m);
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m->channels = channels;
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case PA_CHANNEL_MAP_AIFF:
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/* This is somewhat compatible with RFC3551 */
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m->map[0] = PA_CHANNEL_POSITION_MONO;
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m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
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m->map[1] = PA_CHANNEL_POSITION_SIDE_LEFT;
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m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
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m->map[3] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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m->map[4] = PA_CHANNEL_POSITION_SIDE_RIGHT;
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m->map[5] = PA_CHANNEL_POSITION_LFE;
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m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
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m->map[3] = PA_CHANNEL_POSITION_REAR_LEFT;
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m->map[4] = PA_CHANNEL_POSITION_REAR_RIGHT;
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m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
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m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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m->map[0] = PA_CHANNEL_POSITION_LEFT;
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m->map[1] = PA_CHANNEL_POSITION_RIGHT;
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m->map[2] = PA_CHANNEL_POSITION_CENTER;
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m->map[0] = PA_CHANNEL_POSITION_LEFT;
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m->map[1] = PA_CHANNEL_POSITION_CENTER;
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m->map[2] = PA_CHANNEL_POSITION_RIGHT;
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m->map[3] = PA_CHANNEL_POSITION_LFE;
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case PA_CHANNEL_MAP_ALSA:
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m->map[0] = PA_CHANNEL_POSITION_MONO;
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m->map[6] = PA_CHANNEL_POSITION_SIDE_LEFT;
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m->map[7] = PA_CHANNEL_POSITION_SIDE_RIGHT;
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m->map[5] = PA_CHANNEL_POSITION_LFE;
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m->map[4] = PA_CHANNEL_POSITION_FRONT_CENTER;
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m->map[2] = PA_CHANNEL_POSITION_REAR_LEFT;
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m->map[3] = PA_CHANNEL_POSITION_REAR_RIGHT;
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m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
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m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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case PA_CHANNEL_MAP_AUX: {
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if (channels >= PA_CHANNELS_MAX)
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for (i = 0; i < channels; i++)
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m->map[i] = PA_CHANNEL_POSITION_AUX0 + i;
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case PA_CHANNEL_MAP_WAVEEX:
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m->map[0] = PA_CHANNEL_POSITION_MONO;
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m->map[15] = PA_CHANNEL_POSITION_TOP_REAR_LEFT;
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m->map[16] = PA_CHANNEL_POSITION_TOP_REAR_CENTER;
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m->map[17] = PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
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m->map[12] = PA_CHANNEL_POSITION_TOP_FRONT_LEFT;
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m->map[13] = PA_CHANNEL_POSITION_TOP_FRONT_CENTER;
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m->map[14] = PA_CHANNEL_POSITION_TOP_FRONT_RIGHT;
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m->map[11] = PA_CHANNEL_POSITION_TOP_CENTER;
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m->map[9] = PA_CHANNEL_POSITION_SIDE_LEFT;
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m->map[10] = PA_CHANNEL_POSITION_SIDE_RIGHT;
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m->map[8] = PA_CHANNEL_POSITION_REAR_CENTER;
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m->map[6] = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
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m->map[7] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
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m->map[4] = PA_CHANNEL_POSITION_REAR_LEFT;
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m->map[5] = PA_CHANNEL_POSITION_REAR_RIGHT;
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m->map[3] = PA_CHANNEL_POSITION_LFE;
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m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
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m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
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m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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case PA_CHANNEL_MAP_OSS:
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m->map[0] = PA_CHANNEL_POSITION_MONO;
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m->map[6] = PA_CHANNEL_POSITION_REAR_LEFT;
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m->map[7] = PA_CHANNEL_POSITION_REAR_RIGHT;
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m->map[4] = PA_CHANNEL_POSITION_SIDE_LEFT;
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m->map[5] = PA_CHANNEL_POSITION_SIDE_RIGHT;
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m->map[3] = PA_CHANNEL_POSITION_LFE;
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m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
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m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
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m->map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
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const char* pa_channel_position_to_string(pa_channel_position_t pos) {
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if (pos < 0 || pos >= PA_CHANNEL_POSITION_MAX)
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int pa_channel_map_equal(const pa_channel_map *a, const pa_channel_map *b) {
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if (a->channels != b->channels)
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for (c = 0; c < a->channels; c++)
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if (a->map[c] != b->map[c])
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char* pa_channel_map_snprint(char *s, size_t l, const pa_channel_map *map) {
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for (channel = 0; channel < map->channels && l > 1; channel++) {
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l -= snprintf(e, l, "%s%s",
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pa_channel_position_to_string(map->map[channel]));
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pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s) {
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memset(&map, 0, sizeof(map));
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if (strcmp(s, "stereo") == 0) {
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map.map[0] = PA_CHANNEL_POSITION_LEFT;
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map.map[1] = PA_CHANNEL_POSITION_RIGHT;
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while ((p = pa_split(s, ",", &state))) {
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if (map.channels >= PA_CHANNELS_MAX) {
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/* Some special aliases */
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if (strcmp(p, "left") == 0)
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map.map[map.channels++] = PA_CHANNEL_POSITION_LEFT;
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else if (strcmp(p, "right") == 0)
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map.map[map.channels++] = PA_CHANNEL_POSITION_RIGHT;
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else if (strcmp(p, "center") == 0)
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map.map[map.channels++] = PA_CHANNEL_POSITION_CENTER;
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else if (strcmp(p, "subwoofer") == 0)
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map.map[map.channels++] = PA_CHANNEL_POSITION_SUBWOOFER;
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pa_channel_position_t i;
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for (i = 0; i < PA_CHANNEL_POSITION_MAX; i++)
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if (strcmp(p, table[i]) == 0) {
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map.map[map.channels++] = i;
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if (i >= PA_CHANNEL_POSITION_MAX) {
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if (!pa_channel_map_valid(&map))
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int pa_channel_map_valid(const pa_channel_map *map) {
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if (map->channels <= 0 || map->channels > PA_CHANNELS_MAX)
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for (c = 0; c < map->channels; c++) {
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if (map->map[c] < 0 ||map->map[c] >= PA_CHANNEL_POSITION_MAX)
added
removed
src/pulse/channelmap.c
