ao: rename playthread to ao_thread

"playthread" is a confusing name which doesn't describe what it really
is. Rename it to ao_thread, and ao_wakeup_playthread to ao_wakeup,
in the same style as VO threads. This makes call stack function names
less confusing.

audio/out/ao_audiotrack.c

@@ -547,7 +547,7 @@ error:
     return -1;
 }
 
-static MP_THREAD_VOID playthread(void *arg)
+static MP_THREAD_VOID ao_thread(void *arg)
 {
     struct ao *ao = arg;
     struct priv *p = ao->priv;
@@ -766,7 +766,7 @@ static int init(struct ao *ao)
         goto error;
     }
 
-    if (mp_thread_create(&p->thread, playthread, ao)) {
+    if (mp_thread_create(&p->thread, ao_thread, ao)) {
         MP_ERR(ao, "pthread creation failed\n");
         goto error;
     }

audio/out/ao_pulse.c

@@ -118,7 +118,7 @@ static void stream_request_cb(pa_stream *s, size_t length, void *userdata)
 {
     struct ao *ao = userdata;
     struct priv *priv = ao->priv;
-    ao_wakeup_playthread(ao);
+    ao_wakeup(ao);
     pa_threaded_mainloop_signal(priv->mainloop, 0);
 }
 
@@ -135,7 +135,7 @@ static void underflow_cb(pa_stream *s, void *userdata)
     struct priv *priv = ao->priv;
     priv->playing = false;
     priv->underrun_signalled = true;
-    ao_wakeup_playthread(ao);
+    ao_wakeup(ao);
     pa_threaded_mainloop_signal(priv->mainloop, 0);
 }
 

audio/out/ao_sndio.c

@@ -303,7 +303,7 @@ static void get_state(struct ao *ao, struct mp_pcm_state *state)
                 state->free_samples, state->queued_samples, state->delay);
         p->playing = false;
         state->playing = p->playing;
-        ao_wakeup_playthread(ao);
+        ao_wakeup(ao);
     } else {
         state->playing = p->playing;
     }

audio/out/buffer.c

@@ -41,7 +41,7 @@ struct buffer_state {
     mp_mutex lock;
     mp_cond wakeup;
 
-    // Playthread sleep
+    // AO thread sleep
     mp_mutex pt_lock;
     mp_cond pt_wakeup;
 
@@ -83,9 +83,9 @@ struct buffer_state {
     bool terminate;             // exit thread
 };
 
-static MP_THREAD_VOID playthread(void *arg);
+static MP_THREAD_VOID ao_thread(void *arg);
 
-void ao_wakeup_playthread(struct ao *ao)
+void ao_wakeup(struct ao *ao)
 {
     struct buffer_state *p = ao->buffer_state;
     mp_mutex_lock(&p->pt_lock);
@@ -352,7 +352,7 @@ void ao_reset(struct ao *ao)
         ao->driver->reset(ao);
 
     if (wakeup)
-        ao_wakeup_playthread(ao);
+        ao_wakeup(ao);
 }
 
 // Initiate playback. This moves from the stop/underrun state to actually
@@ -379,7 +379,7 @@ void ao_start(struct ao *ao)
     if (do_start)
         ao->driver->start(ao);
 
-    ao_wakeup_playthread(ao);
+    ao_wakeup(ao);
 }
 
 void ao_set_paused(struct ao *ao, bool paused, bool eof)
@@ -448,7 +448,7 @@ void ao_set_paused(struct ao *ao, bool paused, bool eof)
     }
 
     if (wakeup)
-        ao_wakeup_playthread(ao);
+        ao_wakeup(ao);
 }
 
 // Whether audio is playing. This means that there is still data in the buffers,
@@ -503,7 +503,7 @@ void ao_drain(struct ao *ao)
 static void wakeup_filters(void *ctx)
 {
     struct ao *ao = ctx;
-    ao_wakeup_playthread(ao);
+    ao_wakeup(ao);
 }
 
 void ao_uninit(struct ao *ao)
@@ -578,7 +578,7 @@ bool init_buffer_post(struct ao *ao)
         mp_filter_graph_set_wakeup_cb(p->filter_root, wakeup_filters, ao);
 
         p->thread_valid = true;
-        if (mp_thread_create(&p->thread, playthread, ao)) {
+        if (mp_thread_create(&p->thread, ao_thread, ao)) {
             p->thread_valid = false;
             return false;
         }
@@ -701,7 +701,7 @@ eof:
     return true;
 }
 
-static MP_THREAD_VOID playthread(void *arg)
+static MP_THREAD_VOID ao_thread(void *arg)
 {
     struct ao *ao = arg;
     struct buffer_state *p = ao->buffer_state;
@@ -748,6 +748,6 @@ void ao_unblock(struct ao *ao)
         mp_mutex_lock(&p->lock);
         p->initial_unblocked = true;
         mp_mutex_unlock(&p->lock);
-        ao_wakeup_playthread(ao);
+        ao_wakeup(ao);
     }
 }

audio/out/internal.h

@@ -159,7 +159,7 @@ struct ao_driver {
     bool (*set_pause)(struct ao *ao, bool paused);
     // pull based: start the audio callback
     // push based: start playing queued data
-    //             AO should call ao_wakeup_playthread() if a period boundary
+    //             AO should call ao_wakeup() if a period boundary
     //             is crossed, or playback stops due to external reasons
     //             (including underruns or device removal)
     //             must set mp_pcm_state.playing; unset on error/underrun/end
@@ -231,7 +231,7 @@ bool ao_can_convert_inplace(struct ao_convert_fmt *fmt);
 bool ao_need_conversion(struct ao_convert_fmt *fmt);
 void ao_convert_inplace(struct ao_convert_fmt *fmt, void **data, int num_samples);
 
-void ao_wakeup_playthread(struct ao *ao);
+void ao_wakeup(struct ao *ao);
 
 int ao_read_data_converted(struct ao *ao, struct ao_convert_fmt *fmt,
                            void **data, int samples, int64_t out_time_ns);