Revert "Helpers to emit asynchronous key press events (refs #3661)"

This reverts commit cb72d26f.

modules/video_output/keythread.c

-/*****************************************************************************
- * keythread.c: Asynchronous threads to emit key events
- *****************************************************************************
- * Copyright (C) 2010 Rémi Denis-Courmont
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <stdlib.h>
-
-#include <vlc_common.h>
-#include <assert.h>
-
-#include "keythread.h"
-
-struct key_thread
-{
-    vlc_object_t *libvlc;
-    int          value;
-    vlc_mutex_t  lock;
-    vlc_cond_t   wait;
-    vlc_thread_t thread;
-};
-
-static void *KeyThread (void *data)
-{
-    key_thread_t *keys = data;
-
-    mutex_cleanup_push (&keys->lock);
-    for (;;)
-    {
-        int value;
-
-        vlc_mutex_lock (&keys->lock);
-        /* Note: Key strokes may be lost. A chained list should be used. */
-        while (!(value = keys->value))
-            vlc_cond_wait (&keys->wait, &keys->lock);
-        keys->value = 0;
-        vlc_mutex_unlock (&keys->lock);
-
-        int canc = vlc_savecancel ();
-        var_SetInteger (keys->libvlc, "key-pressed", value);
-        vlc_restorecancel (canc);
-    }
-
-    vlc_cleanup_pop ();
-    assert (0);
-}
-
-
-#undef vlc_CreateKeyThread
-/**
- * Create an asynchronous key event thread.
- *
- * Normally, key events are received by the interface thread (e.g. Qt4), or
- * the window provider (e.g. XCB). However, some legacy video output plugins
- * do not use window providers, neither do they run their own event threads.
- * Instead, those lame video outputs insist on receiving key events from their
- * Manage() function.
- *
- * Some key event handlers are quite slow so they should not be triggered from
- * the video output thread. Worse yet, some handlers (such as snapshot) would
- * deadlock if triggered from the video output thread.
- */
-key_thread_t *vlc_CreateKeyThread (vlc_object_t *obj)
-{
-    key_thread_t *keys = malloc (sizeof (*keys));
-    if (unlikely(keys == NULL))
-        return NULL;
-
-    keys->libvlc = VLC_OBJECT(obj->p_libvlc);
-    keys->value = 0;
-    vlc_mutex_init (&keys->lock);
-    vlc_cond_init (&keys->wait);
-    if (vlc_clone (&keys->thread, KeyThread, keys, VLC_THREAD_PRIORITY_LOW))
-    {
-        vlc_cond_destroy (&keys->wait);
-        vlc_mutex_destroy (&keys->lock);
-        free (keys);
-        return NULL;
-    }
-    return keys;
-}
-
-void vlc_DestroyKeyThread (key_thread_t *keys)
-{
-    if (keys == NULL)
-        return;
-
-    vlc_cancel (keys->thread);
-    vlc_join(keys->thread, NULL);
-    vlc_cond_destroy(&keys->wait);
-    vlc_mutex_destroy(&keys->lock);
-    free (keys);
-}
-
-void vlc_EmitKey (key_thread_t *keys, int value)
-{
-    if (keys == NULL)
-        return;
-
-    vlc_mutex_lock(&keys->lock);
-    keys->value = value;
-    vlc_cond_signal(&keys->wait);
-    vlc_mutex_unlock(&keys->lock);
-}

modules/video_output/keythread.h

-/*****************************************************************************
- * keythread.h:
- *****************************************************************************
- * Copyright (C) 2010 Rémi Denis-Courmont
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
-
-typedef struct key_thread key_thread_t;
-
-key_thread_t *vlc_CreateKeyThread (vlc_object_t *obj);
-#define vlc_CreateKeyThread(o) vlc_CreateKeyThread(VLC_OBJECT(o))
-void vlc_DestroyKeyThread (key_thread_t *keys);
-void vlc_EmitKey (key_thread_t *keys, int value);