channelmap: Add 2.1 surround

Add surround-21 as a alias to set up a 2.1 channel map.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>

diff --git a/src/pulse/channelmap.c b/src/pulse/channelmap.c
index 72e4130eeffcae0afee44f02cf4e93c6bf2bf3f9..e1b173a187f67b54386d930dac5a6a2e23eacaed 100644 (file)
--- a/src/pulse/channelmap.c
+++ b/src/pulse/channelmap.c
@@ -536,6 +536,12 @@ pa_channel_map *pa_channel_map_parse(pa_channel_map *rmap, const char *s) {
         map.map[0] = PA_CHANNEL_POSITION_LEFT;
         map.map[1] = PA_CHANNEL_POSITION_RIGHT;
         goto finish;
+    } else if (pa_streq(s, "surround-21")) {
+        map.channels = 3;
+        map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;
+        map.map[1] = PA_CHANNEL_POSITION_FRONT_RIGHT;
+        map.map[2] = PA_CHANNEL_POSITION_LFE;
+        goto finish;
     } else if (pa_streq(s, "surround-40")) {
         map.channels = 4;
         map.map[0] = PA_CHANNEL_POSITION_FRONT_LEFT;