modules/video_output/wextern.c

   1 /**
   2  * @file wextern.c
   3  * @brief Dummy video window provider where the size is handled externally
   4  */
   5 /*****************************************************************************
   6  * Copyright © 2019 VideoLabs, VideoLAN and VideoLAN Authors
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License as published by
  10  * the Free Software Foundation; either version 2.1 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 #ifdef HAVE_CONFIG_H
  24 # include <config.h>
  25 #endif
  26
  27 #include <stdarg.h>
  28
  29 #include <vlc_common.h>
  30 #include <vlc_plugin.h>
  31 #include <vlc_vout_window.h>
  32
  33 #include <vlc/libvlc.h>
  34 #include <vlc/libvlc_picture.h>
  35 #include <vlc/libvlc_media.h>
  36 #include <vlc/libvlc_renderer_discoverer.h>
  37 #include <vlc/libvlc_media_player.h>
  38
  39 static int Open(vout_window_t *);
  40
  41 vlc_module_begin()
  42     set_shortname(N_("Callback window"))
  43     set_description(N_("External callback window"))
  44     set_category(CAT_VIDEO)
  45     set_subcategory(SUBCAT_VIDEO_VOUT)
  46     set_capability("vout window", 0)
  47     set_callback(Open)
  48 vlc_module_end()
  49
  50 typedef struct {
  51     void                                   *opaque;
  52     libvlc_video_output_set_resize_cb      setResizeCb;
  53 } wextern_t;
  54
  55 static void WindowResize(void *opaque, unsigned width, unsigned height)
  56 {
  57     vout_window_t *window = opaque;
  58     vout_window_ReportSize(window, width, height);
  59 }
  60
  61 static int Enable(struct vout_window_t *wnd, const vout_window_cfg_t *wcfg)
  62 {
  63     wextern_t *sys = wnd->sys;
  64
  65     if ( sys->setResizeCb != NULL )
  66         /* bypass the size handling as the window doesn't handle the size */
  67         sys->setResizeCb( sys->opaque, WindowResize, wnd );
  68
  69     (void) wcfg;
  70     return VLC_SUCCESS;
  71 }
  72
  73 static void Disable(struct vout_window_t *wnd)
  74 {
  75     wextern_t *sys = wnd->sys;
  76
  77     if ( sys->setResizeCb != NULL )
  78         sys->setResizeCb( sys->opaque, NULL, NULL );
  79 }
  80
  81 static const struct vout_window_operations ops = {
  82     .enable  = Enable,
  83     .disable = Disable,
  84     // .resize: don't let the core resize us on zoom/crop/ar changes
  85     //          the display module should do the ReportSize for us
  86 };
  87
  88 static int Open(vout_window_t *wnd)
  89 {
  90     wextern_t *sys = vlc_obj_malloc(VLC_OBJECT(wnd), sizeof(*sys));
  91     if (unlikely(sys==NULL))
  92         return VLC_ENOMEM;
  93     sys->opaque          = var_InheritAddress( wnd, "vout-cb-opaque" );
  94     sys->setResizeCb     = var_InheritAddress( wnd, "vout-cb-resize-cb" );
  95
  96     wnd->sys = sys;
  97     wnd->type = VOUT_WINDOW_TYPE_DUMMY;
  98     wnd->ops = &ops;
  99     return VLC_SUCCESS;
 100 }