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155 lines
4.1 KiB
155 lines
4.1 KiB
/**
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* @file drawable.c
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* @brief Legacy monolithic LibVLC video window provider
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*/
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/*****************************************************************************
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* Copyright © 2009 Rémi Denis-Courmont
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdarg.h>
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#include <assert.h>
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#include <vlc_common.h>
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#include <vlc_plugin.h>
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#include <vlc_vout_window.h>
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#define HWND_TEXT N_("Window handle (HWND)")
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#define HWND_LONGTEXT N_( \
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"Video will be embedded in this pre-existing window. " \
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"If zero, a new window will be created.")
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static int Open (vout_window_t *, const vout_window_cfg_t *);
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static void Close(vout_window_t *);
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/*
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* Module descriptor
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*/
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vlc_module_begin ()
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set_shortname (N_("Drawable"))
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set_description (N_("Embedded window video"))
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set_category (CAT_VIDEO)
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set_subcategory (SUBCAT_VIDEO_VOUT)
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set_capability ("vout window", 70)
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set_callbacks (Open, Close)
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add_shortcut ("embed-hwnd")
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add_integer ("drawable-hwnd", 0, HWND_TEXT, HWND_LONGTEXT, true)
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change_volatile ()
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vlc_module_end ()
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static int Control (vout_window_t *, int, va_list);
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/* Keep a list of busy drawables, so we don't overlap videos if there are
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* more than one video track in the stream. */
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static vlc_mutex_t serializer = VLC_STATIC_MUTEX;
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static uintptr_t *used = NULL;
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/**
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* Find the drawable set by libvlc application.
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*/
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static int Open (vout_window_t *wnd, const vout_window_cfg_t *cfg)
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{
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if (cfg->type != VOUT_WINDOW_TYPE_INVALID
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&& cfg->type != VOUT_WINDOW_TYPE_HWND)
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return VLC_EGENERIC;
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uintptr_t val = var_InheritInteger (wnd, "drawable-hwnd");
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if (val == 0)
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return VLC_EGENERIC;
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uintptr_t *tab;
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size_t n = 0;
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vlc_mutex_lock (&serializer);
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if (used != NULL)
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for (/*n = 0*/; used[n]; n++)
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if (used[n] == val)
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{
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msg_Warn (wnd, "HWND 0x%zX is busy", val);
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val = 0;
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goto skip;
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}
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tab = realloc (used, sizeof (*used) * (n + 2));
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if (likely(tab != NULL))
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{
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used = tab;
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used[n] = val;
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used[n + 1] = 0;
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}
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else
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val = 0;
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skip:
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vlc_mutex_unlock (&serializer);
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if (val == 0)
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return VLC_EGENERIC;
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wnd->type = VOUT_WINDOW_TYPE_HWND;
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wnd->handle.hwnd = (void *)val;
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wnd->control = Control;
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wnd->sys = (void *)val;
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return VLC_SUCCESS;
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}
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/**
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* Release the drawable.
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*/
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static void Close (vout_window_t *wnd)
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{
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uintptr_t val = (uintptr_t)wnd->sys;
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size_t n = 0;
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/* Remove this drawable from the list of busy ones */
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vlc_mutex_lock (&serializer);
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assert (used != NULL);
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while (used[n] != val)
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{
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assert (used[n]);
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n++;
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}
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do
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used[n] = used[n + 1];
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while (used[++n] != 0);
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if (n == 0)
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{
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free (used);
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used = NULL;
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}
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vlc_mutex_unlock (&serializer);
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}
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static int Control (vout_window_t *wnd, int query, va_list ap)
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{
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VLC_UNUSED( ap );
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switch (query)
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{
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case VOUT_WINDOW_SET_SIZE: /* not allowed */
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case VOUT_WINDOW_SET_STATE: /* not allowed either, would be ugly */
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return VLC_EGENERIC;
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default:
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msg_Warn (wnd, "unsupported control query %d", query);
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return VLC_EGENERIC;
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}
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}
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