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Original commit message from CVS: * sys/v4l/gstv4lxoverlay.c: (gst_v4l_xoverlay_interface_init), (gst_v4l_xoverlay_set_xwindow_id): * sys/v4l2/gstv4l2xoverlay.c: (gst_v4l2_xoverlay_interface_init), (gst_v4l2_xoverlay_set_xwindow_id): Add debug categories, fix overlay disabling.
218 lines
5.9 KiB
C
218 lines
5.9 KiB
C
/* GStreamer X-based overlay interface implementation
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* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* gstv4l2xoverlay.c: X-based overlay interface implementation for V4L2
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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 <string.h>
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#include <gst/gst.h>
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#include <gst/xoverlay/xoverlay.h>
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#include <X11/X.h>
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#include <X11/Xlib.h>
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#include <X11/extensions/Xv.h>
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#include <X11/extensions/Xvlib.h>
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#include <sys/stat.h>
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#include "gstv4l2xoverlay.h"
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#include "gstv4l2element.h"
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#include "v4l2_calls.h"
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GST_DEBUG_CATEGORY_STATIC (v4l2xv_debug);
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#define GST_CAT_DEFAULT v4l2xv_debug
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struct _GstV4l2Xv
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{
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Display *dpy;
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gint port, idle_id;
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GMutex *mutex;
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};
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static void gst_v4l2_xoverlay_set_xwindow_id (GstXOverlay * overlay,
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XID xwindow_id);
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void
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gst_v4l2_xoverlay_interface_init (GstXOverlayClass * klass)
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{
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/* default virtual functions */
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klass->set_xwindow_id = gst_v4l2_xoverlay_set_xwindow_id;
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GST_DEBUG_CATEGORY_INIT (v4l2xv_debug, "v4l2xv", 0,
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"V4L2 XOverlay interface debugging");
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}
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void
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gst_v4l2_xoverlay_open (GstV4l2Element * v4l2element)
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{
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struct stat s;
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GstV4l2Xv *v4l2xv;
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const gchar *name = g_getenv ("DISPLAY");
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int ver, rel, req, ev, err, anum, i, id = 0, first_id = 0, min;
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XvAdaptorInfo *ai;
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Display *dpy;
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/* we need a display, obviously */
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if (!name || !(dpy = XOpenDisplay (name))) {
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GST_WARNING ("No $DISPLAY set or failed to open - no overlay");
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return;
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}
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/* find port that belongs to this device */
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if (XvQueryExtension (dpy, &ver, &rel, &req, &ev, &err) != Success) {
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GST_WARNING ("Xv extension not supported - no overlay");
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XCloseDisplay (dpy);
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return;
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}
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if (XvQueryAdaptors (dpy, DefaultRootWindow (dpy), &anum, &ai) != Success) {
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GST_WARNING ("Failed to query Xv adaptors");
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XCloseDisplay (dpy);
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return;
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}
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if (fstat (v4l2element->video_fd, &s) < 0) {
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GST_ERROR ("Failed to stat() file descriptor: %s", g_strerror (errno));
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XCloseDisplay (dpy);
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return;
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}
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min = s.st_rdev & 0xff;
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for (i = 0; i < anum; i++) {
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if (!strcmp (ai[i].name, "video4linux")) {
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if (first_id == 0)
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first_id = ai[i].base_id;
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/* hmm... */
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if (first_id != 0 && ai[i].base_id == first_id + min)
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id = ai[i].base_id;
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}
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}
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XvFreeAdaptorInfo (ai);
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if (id == 0) {
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GST_WARNING ("Did not find XvPortID for device - no overlay");
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XCloseDisplay (dpy);
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return;
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}
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v4l2xv = g_new0 (GstV4l2Xv, 1);
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v4l2xv->dpy = dpy;
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v4l2xv->port = id;
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v4l2xv->mutex = g_mutex_new ();
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v4l2xv->idle_id = 0;
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v4l2element->xv = v4l2xv;
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if (v4l2element->xwindow_id) {
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gst_v4l2_xoverlay_set_xwindow_id (GST_X_OVERLAY (v4l2element),
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v4l2element->xwindow_id);
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}
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}
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void
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gst_v4l2_xoverlay_close (GstV4l2Element * v4l2element)
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{
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GstV4l2Xv *v4l2xv = v4l2element->xv;
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if (!v4l2element->xv)
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return;
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if (v4l2element->xwindow_id) {
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gst_v4l2_xoverlay_set_xwindow_id (GST_X_OVERLAY (v4l2element), 0);
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}
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XCloseDisplay (v4l2xv->dpy);
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g_mutex_free (v4l2xv->mutex);
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if (v4l2xv->idle_id)
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g_source_remove (v4l2xv->idle_id);
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g_free (v4l2xv);
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v4l2element->xv = NULL;
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}
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static gboolean
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idle_refresh (gpointer data)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (data);
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GstV4l2Xv *v4l2xv = v4l2element->xv;
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XWindowAttributes attr;
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if (v4l2xv) {
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g_mutex_lock (v4l2xv->mutex);
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XGetWindowAttributes (v4l2xv->dpy, v4l2element->xwindow_id, &attr);
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XvPutVideo (v4l2xv->dpy, v4l2xv->port, v4l2element->xwindow_id,
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DefaultGC (v4l2xv->dpy, DefaultScreen (v4l2xv->dpy)),
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0, 0, attr.width, attr.height, 0, 0, attr.width, attr.height);
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v4l2xv->idle_id = 0;
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g_mutex_unlock (v4l2xv->mutex);
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}
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/* once */
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return FALSE;
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}
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static void
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gst_v4l2_xoverlay_set_xwindow_id (GstXOverlay * overlay, XID xwindow_id)
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{
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GstV4l2Element *v4l2element = GST_V4L2ELEMENT (overlay);
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GstV4l2Xv *v4l2xv = v4l2element->xv;
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XWindowAttributes attr;
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gboolean change = (v4l2element->xwindow_id != xwindow_id);
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GST_LOG_OBJECT (v4l2element, "Setting XID to %lx", (gulong) xwindow_id);
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if (v4l2xv)
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g_mutex_lock (v4l2xv->mutex);
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if (change) {
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if (v4l2element->xwindow_id && v4l2xv) {
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GST_DEBUG_OBJECT (v4l2element,
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"Deactivating old port %lx", v4l2element->xwindow_id);
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XvSelectPortNotify (v4l2xv->dpy, v4l2xv->port, 0);
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XvSelectVideoNotify (v4l2xv->dpy, v4l2element->xwindow_id, 0);
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XvStopVideo (v4l2xv->dpy, v4l2xv->port, v4l2element->xwindow_id);
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}
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v4l2element->xwindow_id = xwindow_id;
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}
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if (!v4l2xv || xwindow_id == 0) {
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if (v4l2xv)
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g_mutex_unlock (v4l2xv->mutex);
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return;
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}
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if (change) {
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GST_DEBUG_OBJECT (v4l2element, "Activating new port %lx", xwindow_id);
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/* draw */
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XvSelectPortNotify (v4l2xv->dpy, v4l2xv->port, 1);
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XvSelectVideoNotify (v4l2xv->dpy, v4l2element->xwindow_id, 1);
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}
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XGetWindowAttributes (v4l2xv->dpy, v4l2element->xwindow_id, &attr);
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XvPutVideo (v4l2xv->dpy, v4l2xv->port, v4l2element->xwindow_id,
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DefaultGC (v4l2xv->dpy, DefaultScreen (v4l2xv->dpy)),
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0, 0, attr.width, attr.height, 0, 0, attr.width, attr.height);
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if (v4l2xv->idle_id)
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g_source_remove (v4l2xv->idle_id);
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v4l2xv->idle_id = g_idle_add (idle_refresh, v4l2element);
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g_mutex_unlock (v4l2xv->mutex);
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}
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