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-rw-r--r--src/pulse/channelmap.c445
1 files changed, 445 insertions, 0 deletions
diff --git a/src/pulse/channelmap.c b/src/pulse/channelmap.c
new file mode 100644
index 00000000..a4f13372
--- /dev/null
+++ b/src/pulse/channelmap.c
@@ -0,0 +1,445 @@
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ PulseAudio 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.
+
+ PulseAudio 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 PulseAudio; 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 <pulse/xmalloc.h>
+#include <pulsecore/core-util.h>
+
+#include "channelmap.h"
+
+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_AUX0] = "aux0",
+ [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",
+ [PA_CHANNEL_POSITION_AUX13] = "aux13",
+ [PA_CHANNEL_POSITION_AUX14] = "aux14",
+ [PA_CHANNEL_POSITION_AUX15] = "aux15",
+
+ [PA_CHANNEL_POSITION_TOP_CENTER] = "top-center",
+
+ [PA_CHANNEL_POSITION_TOP_FRONT_LEFT] = "top-front-left",
+ [PA_CHANNEL_POSITION_TOP_FRONT_RIGHT] = "top-front-right",
+ [PA_CHANNEL_POSITION_TOP_FRONT_CENTER] = "top-front-center",
+
+ [PA_CHANNEL_POSITION_TOP_REAR_LEFT] = "top-rear-left",
+ [PA_CHANNEL_POSITION_TOP_REAR_RIGHT] = "top-rear-right",
+ [PA_CHANNEL_POSITION_TOP_REAR_CENTER] = "top-rear-center"
+};
+
+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, pa_channel_map_def_t def) {
+ assert(m);
+ assert(channels > 0);
+ assert(channels <= PA_CHANNELS_MAX);
+
+ pa_channel_map_init(m);
+
+ m->channels = channels;
+
+ switch (def) {
+ case PA_CHANNEL_MAP_AIFF:
+
+ /* This is somewhat compatible with RFC3551 */
+
+ switch (channels) {
+ case 1:
+ m->map[0] = PA_CHANNEL_POSITION_MONO;
+ return m;
+
+ case 6:
+ m->map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
+ m->map[1] = PA_CHANNEL_POSITION_SIDE_LEFT;
+ m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
+ m->map[3] = PA_CHANNEL_POSITION_FRONT_RIGHT;
+ m->map[4] = PA_CHANNEL_POSITION_SIDE_RIGHT;
+ m->map[5] = PA_CHANNEL_POSITION_LFE;
+ return m;
+
+ case 5:
+ m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
+ m->map[3] = PA_CHANNEL_POSITION_REAR_LEFT;
+ m->map[4] = 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;
+
+ case 3:
+ m->map[0] = PA_CHANNEL_POSITION_LEFT;
+ m->map[1] = PA_CHANNEL_POSITION_RIGHT;
+ m->map[2] = PA_CHANNEL_POSITION_CENTER;
+ return m;
+
+ case 4:
+ m->map[0] = PA_CHANNEL_POSITION_LEFT;
+ m->map[1] = PA_CHANNEL_POSITION_CENTER;
+ m->map[2] = PA_CHANNEL_POSITION_RIGHT;
+ m->map[3] = PA_CHANNEL_POSITION_LFE;
+ return m;
+
+ default:
+ return NULL;
+ }
+
+ case PA_CHANNEL_MAP_ALSA:
+
+ 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;
+ }
+
+ case PA_CHANNEL_MAP_AUX: {
+ unsigned i;
+
+ if (channels >= PA_CHANNELS_MAX)
+ return NULL;
+
+ for (i = 0; i < channels; i++)
+ m->map[i] = PA_CHANNEL_POSITION_AUX0 + i;
+
+ return m;
+ }
+
+ case PA_CHANNEL_MAP_WAVEEX:
+
+ switch (channels) {
+ case 1:
+ m->map[0] = PA_CHANNEL_POSITION_MONO;
+ return m;
+
+ case 18:
+ m->map[15] = PA_CHANNEL_POSITION_TOP_REAR_LEFT;
+ m->map[16] = PA_CHANNEL_POSITION_TOP_REAR_CENTER;
+ m->map[17] = PA_CHANNEL_POSITION_TOP_REAR_RIGHT;
+ /* Fall through */
+
+ case 15:
+ m->map[12] = PA_CHANNEL_POSITION_TOP_FRONT_LEFT;
+ m->map[13] = PA_CHANNEL_POSITION_TOP_FRONT_CENTER;
+ m->map[14] = PA_CHANNEL_POSITION_TOP_FRONT_RIGHT;
+ /* Fall through */
+
+ case 12:
+ m->map[11] = PA_CHANNEL_POSITION_TOP_CENTER;
+ /* Fall through */
+
+ case 11:
+ m->map[9] = PA_CHANNEL_POSITION_SIDE_LEFT;
+ m->map[10] = PA_CHANNEL_POSITION_SIDE_RIGHT;
+ /* Fall through */
+
+ case 9:
+ m->map[8] = PA_CHANNEL_POSITION_REAR_CENTER;
+ /* Fall through */
+
+ case 8:
+ m->map[6] = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
+ m->map[7] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
+ /* Fall through */
+
+ case 6:
+ m->map[4] = PA_CHANNEL_POSITION_REAR_LEFT;
+ m->map[5] = PA_CHANNEL_POSITION_REAR_RIGHT;
+ /* Fall through */
+
+ case 4:
+ m->map[3] = PA_CHANNEL_POSITION_LFE;
+ /* Fall through */
+
+ case 3:
+ m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
+ /* 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;
+ }
+
+ case PA_CHANNEL_MAP_OSS:
+
+ switch (channels) {
+ case 1:
+ m->map[0] = PA_CHANNEL_POSITION_MONO;
+ return m;
+
+ case 8:
+ m->map[6] = PA_CHANNEL_POSITION_REAR_LEFT;
+ m->map[7] = PA_CHANNEL_POSITION_REAR_RIGHT;
+ /* Fall through */
+
+ case 6:
+ m->map[4] = PA_CHANNEL_POSITION_SIDE_LEFT;
+ m->map[5] = PA_CHANNEL_POSITION_SIDE_RIGHT;
+ /* Fall through */
+
+ case 4:
+ m->map[3] = PA_CHANNEL_POSITION_LFE;
+ /* Fall through */
+
+ case 3:
+ m->map[2] = PA_CHANNEL_POSITION_FRONT_CENTER;
+ /* 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;
+ }
+
+
+ default:
+ return NULL;
+ }
+}
+
+
+const char* pa_channel_position_to_string(pa_channel_position_t pos) {
+
+ 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%s",
+ first ? "" : ",",
+ pa_channel_position_to_string(map->map[channel]));
+
+ e = strchr(e, 0);
+ first = 0;
+ }
+
+ return s;
+}
+
+pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s) {
+ const char *state;
+ pa_channel_map map;
+ char *p;
+
+ assert(rmap);
+ assert(s);
+
+ memset(&map, 0, sizeof(map));
+
+ if (strcmp(s, "stereo") == 0) {
+ map.channels = 2;
+ map.map[0] = PA_CHANNEL_POSITION_LEFT;
+ map.map[1] = PA_CHANNEL_POSITION_RIGHT;
+ goto finish;
+ }
+
+ state = NULL;
+ map.channels = 0;
+
+ while ((p = pa_split(s, ",", &state))) {
+
+ if (map.channels >= PA_CHANNELS_MAX) {
+ pa_xfree(p);
+ return NULL;
+ }
+
+ /* Some special aliases */
+ if (strcmp(p, "left") == 0)
+ map.map[map.channels++] = PA_CHANNEL_POSITION_LEFT;
+ else if (strcmp(p, "right") == 0)
+ map.map[map.channels++] = PA_CHANNEL_POSITION_RIGHT;
+ else if (strcmp(p, "center") == 0)
+ map.map[map.channels++] = PA_CHANNEL_POSITION_CENTER;
+ else if (strcmp(p, "subwoofer") == 0)
+ map.map[map.channels++] = PA_CHANNEL_POSITION_SUBWOOFER;
+ else {
+ pa_channel_position_t i;
+
+ for (i = 0; i < PA_CHANNEL_POSITION_MAX; i++)
+ if (strcmp(p, table[i]) == 0) {
+ map.map[map.channels++] = i;
+ break;
+ }
+
+ if (i >= PA_CHANNEL_POSITION_MAX) {
+ pa_xfree(p);
+ return NULL;
+ }
+ }
+
+ pa_xfree(p);
+ }
+
+finish:
+
+ if (!pa_channel_map_valid(&map))
+ return NULL;
+
+ *rmap = map;
+ return rmap;
+}
+
+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;
+}
+