[PATCH] added support for get_playcmd in libao

[Andrei Kholodnyi]

it returns playcmd corresponding to the active libao audio plugin
alsa, oss and pulse are supported
---
 src/audio/libao.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/src/audio/libao.c b/src/audio/libao.c
index 0b4734c..b9cd245 100644
--- a/src/audio/libao.c
+++ b/src/audio/libao.c
@@ -77,6 +77,13 @@ static ao_sample_format current_ao_parameters;
 static volatile int ao_stop_playback = 0;
 
 static int default_driver;
+
+/* pairs of libao backend short names and corresponsing play commands */
+static char const * libao_play_cmd[] = {
+    "alsa", "aplay",
+    "oss", "play",
+    "pulse", "paplay"
+};
 static int libao_log_level;
 
 ao_device *device = NULL;
@@ -220,6 +227,18 @@ static void libao_set_loglevel (int level)
 static char  const *
 libao_get_playcmd (void)
 {
+    ao_info * info;
+    int i;
+
+    info = ao_driver_info(default_driver);
+    if (info == NULL)
+        return NULL;
+
+    for (i = 0; i < sizeof(libao_play_cmd)/sizeof(char *); i += 2) {
+        if (!strcmp(info->short_name, libao_play_cmd[i]))
+           return libao_play_cmd[i + 1];
+    }
+
     return NULL;
 }
 
-- 
1.6.0.4