audio: commonize voice initialization

Move some mostly irrelevant code out of audio_init.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

audio/audio.c

@@ -1570,8 +1570,8 @@ static int audio_driver_init(AudioState *s, struct audio_driver *drv,
             drv->pcm_ops->put_buffer_out = audio_generic_put_buffer_out;
         }
 
-        audio_init_nb_voices_out(s, drv);
-        audio_init_nb_voices_in(s, drv);
+        audio_init_nb_voices_out(s, drv, 1);
+        audio_init_nb_voices_in(s, drv, 0);
         s->drv = drv;
         return 0;
     } else {
@@ -1774,21 +1774,6 @@ static AudioState *audio_init(Audiodev *dev, const char *name)
 
     s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
 
-    s->nb_hw_voices_out = audio_get_pdo_out(dev)->voices;
-    s->nb_hw_voices_in = audio_get_pdo_in(dev)->voices;
-
-    if (s->nb_hw_voices_out < 1) {
-        dolog ("Bogus number of playback voices %d, setting to 1\n",
-               s->nb_hw_voices_out);
-        s->nb_hw_voices_out = 1;
-    }
-
-    if (s->nb_hw_voices_in < 0) {
-        dolog ("Bogus number of capture voices %d, setting to 0\n",
-               s->nb_hw_voices_in);
-        s->nb_hw_voices_in = 0;
-    }
-
     if (drvname) {
         driver = audio_driver_lookup(drvname);
         if (driver) {

audio/audio_template.h

@@ -37,11 +37,12 @@
 #endif
 
 static void glue(audio_init_nb_voices_, TYPE)(AudioState *s,
-                                              struct audio_driver *drv)
+                                              struct audio_driver *drv, int min_voices)
 {
     int max_voices = glue (drv->max_voices_, TYPE);
     size_t voice_size = glue(drv->voice_size_, TYPE);
 
+    glue (s->nb_hw_voices_, TYPE) = glue(audio_get_pdo_, TYPE)(s->dev)->voices;
     if (glue (s->nb_hw_voices_, TYPE) > max_voices) {
         if (!max_voices) {
 #ifdef DAC
@@ -56,6 +57,12 @@ static void glue(audio_init_nb_voices_, TYPE)(AudioState *s,
         glue (s->nb_hw_voices_, TYPE) = max_voices;
     }
 
+    if (glue (s->nb_hw_voices_, TYPE) < min_voices) {
+        dolog ("Bogus number of " NAME " voices %d, setting to %d\n",
+               glue (s->nb_hw_voices_, TYPE),
+               min_voices);
+    }
+
     if (audio_bug(__func__, !voice_size && max_voices)) {
         dolog ("drv=`%s' voice_size=0 max_voices=%d\n",
                drv->name, max_voices);