[pulseaudio-discuss] [PATCHv2 60/60] bluetooth: Revive module-bluetooth-discover

[jprvita at gmail.com]

From: João Paulo Rechi Vita <jprvita at openbossa.org>

Create a wrapper module called module-bluetooth-discover to avoid
breaking backward-compatibility of default.pa. This wrapper may
eventually be dropped altoghether with BlueZ 4 support.
---
 src/Makefile.am                                   |   8 ++
 src/modules/bluetooth/module-bluetooth-discover.c | 107 ++++++++++++++++++++++
 2 files changed, 115 insertions(+)
 create mode 100644 src/modules/bluetooth/module-bluetooth-discover.c

diff --git a/src/Makefile.am b/src/Makefile.am
index 0973d31..a283220 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1320,6 +1320,7 @@ endif
 
 if HAVE_BLUEZ
 modlibexec_LTLIBRARIES += \
+		module-bluetooth-discover.la \
 		module-bluetooth-policy.la
 endif
 
@@ -1427,6 +1428,7 @@ SYMDEF_FILES = \
 		module-systemd-login-symdef.h \
 		module-bluetooth-proximity-symdef.h \
 		module-bluetooth-policy-symdef.h \
+		module-bluetooth-discover-symdef.h \
 		module-bluez4-discover-symdef.h \
 		module-bluez4-device-symdef.h \
 		module-bluez5-discover-symdef.h \
@@ -2035,6 +2037,12 @@ module_bluetooth_policy_la_LDFLAGS = $(MODULE_LDFLAGS)
 module_bluetooth_policy_la_LIBADD = $(MODULE_LIBADD)
 module_bluetooth_policy_la_CFLAGS = $(AM_CFLAGS) $(DBUS_CFLAGS)
 
+# Bluetooth discover
+module_bluetooth_discover_la_SOURCES = modules/bluetooth/module-bluetooth-discover.c
+module_bluetooth_discover_la_LDFLAGS = $(MODULE_LDFLAGS)
+module_bluetooth_discover_la_LIBADD = $(MODULE_LIBADD)
+module_bluetooth_discover_la_CFLAGS = $(AM_CFLAGS)
+
 # Bluetooth BlueZ 4 sink / source
 module_bluez4_discover_la_SOURCES = modules/bluetooth/module-bluez4-discover.c
 module_bluez4_discover_la_LDFLAGS = $(MODULE_LDFLAGS)
diff --git a/src/modules/bluetooth/module-bluetooth-discover.c b/src/modules/bluetooth/module-bluetooth-discover.c
new file mode 100644
index 0000000..ffedca2
--- /dev/null
+++ b/src/modules/bluetooth/module-bluetooth-discover.c
@@ -0,0 +1,107 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2013 João Paulo Rechi Vita
+
+  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, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <pulsecore/core-util.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/module.h>
+
+#include "module-bluetooth-discover-symdef.h"
+
+PA_MODULE_AUTHOR("João Paulo Rechi Vita");
+PA_MODULE_DESCRIPTION("Detect available Bluetooth daemon and load the corresponding discovery module");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(true);
+
+struct userdata {
+    pa_module *bluez5_module;
+    pa_module *bluez4_module;
+};
+
+/* This function is heavily inspired in the implementation of ".ifexists" */
+static bool exists(const char *filename) {
+    const char *paths, *state = NULL;
+    char *p, *pathname;
+    bool result;
+
+    if (!(paths = lt_dlgetsearchpath()))
+        return false;
+
+    while ((p = pa_split(paths, ":", &state))) {
+        pathname = pa_sprintf_malloc("%s" PA_PATH_SEP "%s", p, filename);
+        result = access(pathname, F_OK) == 0 ? true : false;
+        pa_log_debug("Checking for existence of '%s': %s", pathname, result ? "success" : "failure");
+        pa_xfree(pathname);
+        pa_xfree(p);
+        if (result)
+            return true;
+    }
+
+    state = NULL;
+    if (PA_UNLIKELY(pa_run_from_build_tree())) {
+        while ((p = pa_split(paths, ":", &state))) {
+            pathname = pa_sprintf_malloc("%s" PA_PATH_SEP ".libs" PA_PATH_SEP "%s", p, filename);
+            result = access(pathname, F_OK) == 0 ? true : false;
+            pa_log_debug("Checking for existence of '%s': %s", pathname, result ? "success" : "failure");
+            pa_xfree(pathname);
+            pa_xfree(p);
+            if (result)
+                return true;
+        }
+    }
+    return false;
+}
+
+int pa__init(pa_module* m) {
+    struct userdata *u;
+
+    pa_assert(m);
+
+    m->userdata = u = pa_xnew0(struct userdata, 1);
+
+    if (exists("module-bluez5-discover.so"))
+        u->bluez5_module = pa_module_load(m->core, "module-bluez5-discover",  NULL);
+
+    if (exists("module-bluez4-discover.so"))
+        u->bluez4_module = pa_module_load(m->core, "module-bluez4-discover",  NULL);
+
+    return 0;
+}
+
+void pa__done(pa_module* m) {
+    struct userdata *u;
+
+    pa_assert(m);
+
+    if (!(u = m->userdata))
+        return;
+
+    if (u->bluez5_module)
+        pa_module_unload(m->core, u->bluez5_module, false);
+
+    if (u->bluez4_module)
+        pa_module_unload(m->core, u->bluez4_module, false);
+
+    pa_xfree(u);
+}
-- 
1.7.11.7