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-rw-r--r--src/pulsecore/x11wrap.c305
1 files changed, 305 insertions, 0 deletions
diff --git a/src/pulsecore/x11wrap.c b/src/pulsecore/x11wrap.c
new file mode 100644
index 0000000..0c040cf
--- /dev/null
+++ b/src/pulsecore/x11wrap.c
@@ -0,0 +1,305 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2004-2006 Lennart Poettering
+
+ 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 2.1 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, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/llist.h>
+#include <pulsecore/log.h>
+#include <pulsecore/shared.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/macro.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_REFCNT_DECLARE;
+ pa_core *core;
+
+ 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;
+ pa_x11_event_cb_t event_cb;
+ pa_x11_kill_cb_t kill_cb;
+ void *userdata;
+};
+
+/* Dispatch all pending X11 events */
+static void work(pa_x11_wrapper *w) {
+ pa_assert(w);
+ pa_assert(PA_REFCNT_VALUE(w) >= 1);
+
+ pa_x11_wrapper_ref(w);
+
+ while (XPending(w->display)) {
+ pa_x11_client *c, *n;
+ XEvent e;
+ XNextEvent(w->display, &e);
+
+ for (c = w->clients; c; c = n) {
+ n = c->next;
+
+ if (c->event_cb)
+ if (c->event_cb(w, &e, c->userdata) != 0)
+ break;
+ }
+ }
+
+ pa_x11_wrapper_unref(w);
+}
+
+/* IO notification event for the X11 display connection */
+static void display_io_event(pa_mainloop_api *m, pa_io_event *e, int fd, pa_io_event_flags_t f, void *userdata) {
+ pa_x11_wrapper *w = userdata;
+
+ pa_assert(m);
+ pa_assert(e);
+ pa_assert(fd >= 0);
+ pa_assert(w);
+ pa_assert(PA_REFCNT_VALUE(w) >= 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;
+
+ pa_assert(m);
+ pa_assert(e);
+ pa_assert(w);
+ pa_assert(PA_REFCNT_VALUE(w) >= 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_io_event_flags_t f, void *userdata) {
+ pa_x11_wrapper *w = userdata;
+
+ pa_assert(m);
+ pa_assert(e);
+ pa_assert(fd >= 0);
+ pa_assert(w);
+ pa_assert(PA_REFCNT_VALUE(w) >= 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;
+ pa_assert(fd >= 0);
+
+ i = pa_xnew(pa_x11_internal, 1);
+ 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) {
+ pa_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;
+
+ pa_assert(display);
+ pa_assert(w);
+ pa_assert(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;
+
+ if (!(d = XOpenDisplay(name))) {
+ pa_log("XOpenDisplay() failed");
+ return NULL;
+ }
+
+ w = pa_xnew(pa_x11_wrapper, 1);
+ PA_REFCNT_INIT(w);
+ w->core = c;
+ 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);
+
+ pa_assert_se(pa_shared_set(c, w->property_name, w) >= 0);
+
+ return w;
+}
+
+static void x11_wrapper_free(pa_x11_wrapper*w) {
+ pa_assert(w);
+
+ pa_assert_se(pa_shared_remove(w->core, w->property_name) >= 0);
+
+ pa_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;
+
+ pa_core_assert_ref(c);
+
+ pa_snprintf(t, sizeof(t), "x11-wrapper%s%s", name ? "@" : "", name ? name : "");
+
+ if ((w = pa_shared_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) {
+ pa_assert(w);
+ pa_assert(PA_REFCNT_VALUE(w) >= 1);
+
+ PA_REFCNT_INC(w);
+ return w;
+}
+
+void pa_x11_wrapper_unref(pa_x11_wrapper* w) {
+ pa_assert(w);
+ pa_assert(PA_REFCNT_VALUE(w) >= 1);
+
+ if (PA_REFCNT_DEC(w) > 0)
+ return;
+
+ x11_wrapper_free(w);
+}
+
+Display *pa_x11_wrapper_get_display(pa_x11_wrapper *w) {
+ pa_assert(w);
+ pa_assert(PA_REFCNT_VALUE(w) >= 1);
+
+ /* Somebody is using us, schedule a output buffer flush */
+ w->core->mainloop->defer_enable(w->defer_event, 1);
+
+ return w->display;
+}
+
+xcb_connection_t *pa_x11_wrapper_get_xcb_connection(pa_x11_wrapper *w) {
+ return XGetXCBConnection(pa_x11_wrapper_get_display(w));
+}
+
+void pa_x11_wrapper_kill(pa_x11_wrapper *w) {
+ pa_x11_client *c, *n;
+
+ pa_assert(w);
+
+ pa_x11_wrapper_ref(w);
+
+ for (c = w->clients; c; c = n) {
+ n = c->next;
+
+ if (c->kill_cb)
+ c->kill_cb(w, c->userdata);
+ }
+
+ pa_x11_wrapper_unref(w);
+}
+
+pa_x11_client* pa_x11_client_new(pa_x11_wrapper *w, pa_x11_event_cb_t event_cb, pa_x11_kill_cb_t kill_cb, void *userdata) {
+ pa_x11_client *c;
+
+ pa_assert(w);
+ pa_assert(PA_REFCNT_VALUE(w) >= 1);
+
+ c = pa_xnew(pa_x11_client, 1);
+ c->wrapper = w;
+ c->event_cb = event_cb;
+ c->kill_cb = kill_cb;
+ c->userdata = userdata;
+
+ PA_LLIST_PREPEND(pa_x11_client, w->clients, c);
+
+ return c;
+}
+
+void pa_x11_client_free(pa_x11_client *c) {
+ pa_assert(c);
+ pa_assert(c->wrapper);
+ pa_assert(PA_REFCNT_VALUE(c->wrapper) >= 1);
+
+ PA_LLIST_REMOVE(pa_x11_client, c->wrapper->clients, c);
+ pa_xfree(c);
+}
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