1 files changed, 247 insertions, 0 deletions
diff --git a/src/pulsecore/x11wrap.c b/src/pulsecore/x11wrap.c
new file mode 100644
index 000000000..2ba0a87fb
--- /dev/null
+++ b/src/pulsecore/x11wrap.c
@@ -0,0 +1,247 @@
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+ 
+  PulseAudio 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 of the License,
+  or (at your option) any later version.
+ 
+  PulseAudio 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 Lesser General Public License
+  along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#include <assert.h>
+#include <stdio.h>
+
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/llist.h>
+#include <pulsecore/log.h>
+#include <pulsecore/props.h>
+
+#include "x11wrap.h"
+
+typedef struct pa_x11_internal pa_x11_internal;
+
+struct pa_x11_internal {
+    PA_LLIST_FIELDS(pa_x11_internal);
+    pa_x11_wrapper *wrapper;
+    pa_io_event* io_event;
+    int fd;
+};
+
+struct pa_x11_wrapper {
+    pa_core *core;
+    int ref;
+    
+    char *property_name;
+    Display *display;
+
+    pa_defer_event* defer_event;
+    pa_io_event* io_event;
+
+    PA_LLIST_HEAD(pa_x11_client, clients);
+    PA_LLIST_HEAD(pa_x11_internal, internals);
+};
+
+struct pa_x11_client {
+    PA_LLIST_FIELDS(pa_x11_client);
+    pa_x11_wrapper *wrapper;
+    int (*callback)(pa_x11_wrapper *w, XEvent *e, void *userdata);
+    void *userdata;
+};
+
+/* Dispatch all pending X11 events */
+static void work(pa_x11_wrapper *w) {
+    assert(w && w->ref >= 1);
+    
+    while (XPending(w->display)) {
+        pa_x11_client *c;
+        XEvent e;
+        XNextEvent(w->display, &e);
+
+        for (c = w->clients; c; c = c->next) {
+            assert(c->callback);
+            if (c->callback(w, &e, c->userdata) != 0)
+                break;
+        }
+    }
+}
+
+/* IO notification event for the X11 display connection */
+static void display_io_event(pa_mainloop_api *m, pa_io_event *e, int fd, PA_GCC_UNUSED pa_io_event_flags_t f, void *userdata) {
+    pa_x11_wrapper *w = userdata;
+    assert(m && e && fd >= 0 && w && w->ref >= 1);
+    work(w);
+}
+
+/* Deferred notification event. Called once each main loop iteration */
+static void defer_event(pa_mainloop_api *m, pa_defer_event *e, void *userdata) {
+    pa_x11_wrapper *w = userdata;
+    assert(m && e && w && w->ref >= 1);
+
+    m->defer_enable(e, 0);
+    
+    work(w);
+}
+
+/* IO notification event for X11 internal connections */
+static void internal_io_event(pa_mainloop_api *m, pa_io_event *e, int fd, PA_GCC_UNUSED pa_io_event_flags_t f, void *userdata) {
+    pa_x11_wrapper *w = userdata;
+    assert(m && e && fd >= 0 && w && w->ref >= 1);
+
+    XProcessInternalConnection(w->display, fd);
+
+    work(w);
+}
+
+/* Add a new IO source for the specified X11 internal connection */
+static pa_x11_internal* x11_internal_add(pa_x11_wrapper *w, int fd) {
+    pa_x11_internal *i;
+    assert(fd >= 0);
+
+    i = pa_xmalloc(sizeof(pa_x11_internal));
+    assert(i);
+    i->wrapper = w;
+    i->io_event = w->core->mainloop->io_new(w->core->mainloop, fd, PA_IO_EVENT_INPUT, internal_io_event, w);
+    i->fd = fd;
+
+    PA_LLIST_PREPEND(pa_x11_internal, w->internals, i);
+    return i;
+}
+
+/* Remove an IO source for an X11 internal connection */
+static void x11_internal_remove(pa_x11_wrapper *w, pa_x11_internal *i) {
+    assert(i);
+
+    PA_LLIST_REMOVE(pa_x11_internal, w->internals, i);
+    w->core->mainloop->io_free(i->io_event);
+    pa_xfree(i);
+}
+
+/* Implementation of XConnectionWatchProc */
+static void x11_watch(Display *display, XPointer userdata, int fd, Bool opening, XPointer *watch_data) {
+    pa_x11_wrapper *w = (pa_x11_wrapper*) userdata;
+    assert(display && w && fd >= 0);
+
+    if (opening)
+        *watch_data = (XPointer) x11_internal_add(w, fd);
+    else
+        x11_internal_remove(w, (pa_x11_internal*) *watch_data);
+}
+
+static pa_x11_wrapper* x11_wrapper_new(pa_core *c, const char *name, const char *t) {
+    pa_x11_wrapper*w;
+    Display *d;
+    int r;
+
+    if (!(d = XOpenDisplay(name))) {
+        pa_log(__FILE__": XOpenDisplay() failed");
+        return NULL;
+    }
+
+    w = pa_xmalloc(sizeof(pa_x11_wrapper));
+    w->core = c;
+    w->ref = 1;
+    w->property_name = pa_xstrdup(t);
+    w->display = d;
+    
+    PA_LLIST_HEAD_INIT(pa_x11_client, w->clients);
+    PA_LLIST_HEAD_INIT(pa_x11_internal, w->internals);
+
+    w->defer_event = c->mainloop->defer_new(c->mainloop, defer_event, w);
+    w->io_event = c->mainloop->io_new(c->mainloop, ConnectionNumber(d), PA_IO_EVENT_INPUT, display_io_event, w);
+
+    XAddConnectionWatch(d, x11_watch, (XPointer) w);
+    
+    r = pa_property_set(c, w->property_name, w);
+    assert(r >= 0);
+    
+    return w;
+}
+
+static void x11_wrapper_free(pa_x11_wrapper*w) {
+    int r;
+    assert(w);
+
+    r = pa_property_remove(w->core, w->property_name);
+    assert(r >= 0);
+
+    assert(!w->clients);
+
+    XRemoveConnectionWatch(w->display, x11_watch, (XPointer) w);
+    XCloseDisplay(w->display);
+    
+    w->core->mainloop->io_free(w->io_event);
+    w->core->mainloop->defer_free(w->defer_event);
+
+    while (w->internals)
+        x11_internal_remove(w, w->internals);
+    
+    pa_xfree(w->property_name);
+    pa_xfree(w);
+}
+
+pa_x11_wrapper* pa_x11_wrapper_get(pa_core *c, const char *name) {
+    char t[256];
+    pa_x11_wrapper *w;
+    assert(c);
+        
+    snprintf(t, sizeof(t), "x11-wrapper%s%s", name ? "-" : "", name ? name : "");
+    if ((w = pa_property_get(c, t)))
+        return pa_x11_wrapper_ref(w);
+
+    return x11_wrapper_new(c, name, t);
+}
+
+pa_x11_wrapper* pa_x11_wrapper_ref(pa_x11_wrapper *w) {
+    assert(w && w->ref >= 1);
+    w->ref++;
+    return w;
+}
+
+void pa_x11_wrapper_unref(pa_x11_wrapper* w) {
+    assert(w && w->ref >= 1);
+
+    if (!(--w->ref))
+        x11_wrapper_free(w);
+}
+
+Display *pa_x11_wrapper_get_display(pa_x11_wrapper *w) {
+    assert(w && w->ref >= 1);
+
+    /* Somebody is using us, schedule a output buffer flush */
+    w->core->mainloop->defer_enable(w->defer_event, 1);
+    
+    return w->display;
+}
+
+pa_x11_client* pa_x11_client_new(pa_x11_wrapper *w, int (*cb)(pa_x11_wrapper *w, XEvent *e, void *userdata), void *userdata) {
+    pa_x11_client *c;
+    assert(w && w->ref >= 1);
+
+    c = pa_xmalloc(sizeof(pa_x11_client));
+    c->wrapper = w;
+    c->callback = cb;
+    c->userdata = userdata;
+
+    PA_LLIST_PREPEND(pa_x11_client, w->clients, c);
+
+    return c;
+}
+
+void pa_x11_client_free(pa_x11_client *c) {
+    assert(c && c->wrapper && c->wrapper->ref >= 1);
+
+    PA_LLIST_REMOVE(pa_x11_client, c->wrapper->clients, c);
+    pa_xfree(c);
+}