command: drop "audio-out-detected-device" property

Coreaudio stopped setting it a few releases ago (66a958bb4f). There is
not much of a user- or API-visible change, so remove it without
deprecation.

DOCS/interface-changes.rst

@@ -39,6 +39,8 @@ Interface changes
     - remove the (deprecated) --vo=opengl-hq
     - remove --opengl-es=force2 (use --opengl-es=yes --opengl-restrict=300)
     - the --msg-level option now affects --log-file
+    - drop "audio-out-detected-device" property - this was unavailable on all
+      audio output drivers for quite a while (coreaudio used to provide it)
  --- mpv 0.27.0 ---
     - drop previously deprecated --field-dominance option
     - drop previously deprecated "osd" command

DOCS/man/input.rst

@@ -2017,10 +2017,6 @@ Property list
 ``current-ao``
     Current audio output driver (name as used with ``--ao``).
 
-``audio-out-detected-device``
-    Return the audio device selected by the AO driver (only implemented for
-    some drivers: currently only ``coreaudio``).
-
 ``working-directory``
     Return the working directory of the mpv process. Can be useful for JSON IPC
     users, because the command line player usually works with relative paths.

TOOLS/lua/audio-hotplug-test.lua

@@ -6,8 +6,3 @@ mp.observe_property("audio-device-list", "native", function(name, val)
         print("  - '" .. e.name .. "' (" .. e.description .. ")")
     end
 end)
-
-mp.observe_property("audio-out-detected-device", "native", function(name, val)
-    print("Detected audio device changed:")
-    print("  - '" .. val)
-end)

audio/out/ao.c

@@ -550,13 +550,6 @@ bool ao_hotplug_check_update(struct ao_hotplug *hp)
     return false;
 }
 
-const char *ao_hotplug_get_detected_device(struct ao_hotplug *hp)
-{
-    if (!hp || !hp->ao)
-        return NULL;
-    return hp->ao->detected_device;
-}
-
 // The return value is valid until the next call to this API.
 struct ao_device_list *ao_hotplug_get_device_list(struct ao_hotplug *hp)
 {

audio/out/ao.h

@@ -112,7 +112,6 @@ struct ao_hotplug *ao_hotplug_create(struct mpv_global *global,
                                      void *wakeup_ctx);
 void ao_hotplug_destroy(struct ao_hotplug *hp);
 bool ao_hotplug_check_update(struct ao_hotplug *hp);
-const char *ao_hotplug_get_detected_device(struct ao_hotplug *hp);
 struct ao_device_list *ao_hotplug_get_device_list(struct ao_hotplug *hp);
 
 void ao_print_devices(struct mpv_global *global, struct mp_log *log);

audio/out/internal.h

@@ -61,9 +61,6 @@ struct ao {
     // default device should be used, this is set to NULL.
     char *device;
 
-    // Device actually chosen by the AO
-    char *detected_device;
-
     // Application name to report to the audio API.
     char *client_name;
 

player/command.c

@@ -1970,17 +1970,6 @@ static int mp_property_ao(void *ctx, struct m_property *p, int action, void *arg
                                     mpctx->ao ? ao_get_name(mpctx->ao) : NULL);
 }
 
-static int mp_property_ao_detected_device(void *ctx,struct m_property *prop,
-                                          int action, void *arg)
-{
-    struct MPContext *mpctx = ctx;
-    struct command_ctx *cmd = mpctx->command_ctx;
-    create_hotplug(mpctx);
-
-    const char *d = ao_hotplug_get_detected_device(cmd->hotplug);
-    return m_property_strdup_ro(action, arg, d);
-}
-
 /// Audio delay (RW)
 static int mp_property_audio_delay(void *ctx, struct m_property *prop,
                                    int action, void *arg)
@@ -3983,7 +3972,6 @@ static const struct m_property mp_properties_base[] = {
     {"audio-device", mp_property_audio_device},
     {"audio-device-list", mp_property_audio_devices},
     {"current-ao", mp_property_ao},
-    {"audio-out-detected-device", mp_property_ao_detected_device},
 
     // Video
     {"fullscreen", mp_property_fullscreen},
@@ -5773,10 +5761,8 @@ void handle_command_updates(struct MPContext *mpctx)
 
     // This is a bit messy: ao_hotplug wakes up the player, and then we have
     // to recheck the state. Then the client(s) will read the property.
-    if (ctx->hotplug && ao_hotplug_check_update(ctx->hotplug)) {
+    if (ctx->hotplug && ao_hotplug_check_update(ctx->hotplug))
         mp_notify_property(mpctx, "audio-device-list");
-        mp_notify_property(mpctx, "audio-out-detected-device");
-    }
 }
 
 void mp_notify(struct MPContext *mpctx, int event, void *arg)