bluetooth: Create oFono backend

2025-11-03 09:01:50 -05:00 · 2014-08-22 11:07:15 +03:00 · 2014-08-22 11:07:15 +03:00 · 6d88a139fc
commit 6d88a139fc
parent dca5d07937
2 changed files with 146 additions and 3 deletions
--- a/src/modules/bluetooth/backend-ofono.c
+++ b/src/modules/bluetooth/backend-ofono.c
@ -0,0 +1,143 @@
+/***
+  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/dbus-shared.h>
+
+#include "bluez5-util.h"
+
+#define OFONO_SERVICE "org.ofono"
+#define HF_AUDIO_AGENT_INTERFACE OFONO_SERVICE ".HandsfreeAudioAgent"
+
+#define HF_AUDIO_AGENT_PATH "/HandsfreeAudioAgent"
+
+#define HF_AUDIO_AGENT_XML                                          \
+    DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
+    "<node>"                                                        \
+    "  <interface name=\"org.freedesktop.DBus.Introspectable\">"    \
+    "    <method name=\"Introspect\">"                              \
+    "      <arg direction=\"out\" type=\"s\" />"                    \
+    "    </method>"                                                 \
+    "  </interface>"                                                \
+    "  <interface name=\"org.ofono.HandsfreeAudioAgent\">"          \
+    "    <method name=\"Release\">"                                 \
+    "    </method>"                                                 \
+    "    <method name=\"NewConnection\">"                           \
+    "      <arg direction=\"in\"  type=\"o\" name=\"card_path\" />" \
+    "      <arg direction=\"in\"  type=\"h\" name=\"sco_fd\" />"    \
+    "      <arg direction=\"in\"  type=\"y\" name=\"codec\" />"     \
+    "    </method>"                                                 \
+    "  </interface>"                                                \
+    "</node>"
+
+struct pa_bluetooth_backend {
+    pa_core *core;
+    pa_dbus_connection *connection;
+};
+
+static DBusMessage *hf_audio_agent_release(DBusConnection *c, DBusMessage *m, void *data) {
+    DBusMessage *r = dbus_message_new_error(m, "org.ofono.Error.NotImplemented", "Operation is not implemented");
+    return r;
+}
+
+static DBusMessage *hf_audio_agent_new_connection(DBusConnection *c, DBusMessage *m, void *data) {
+    DBusMessage *r = dbus_message_new_error(m, "org.ofono.Error.NotImplemented", "Operation is not implemented");
+    return r;
+}
+
+static DBusHandlerResult hf_audio_agent_handler(DBusConnection *c, DBusMessage *m, void *data) {
+    pa_bluetooth_backend *backend = data;
+    DBusMessage *r = NULL;
+    const char *path, *interface, *member;
+
+    pa_assert(backend);
+
+    path = dbus_message_get_path(m);
+    interface = dbus_message_get_interface(m);
+    member = dbus_message_get_member(m);
+
+    if (!pa_streq(path, HF_AUDIO_AGENT_PATH))
+        return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+
+    pa_log_debug("dbus: path=%s, interface=%s, member=%s", path, interface, member);
+
+    if (dbus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) {
+        const char *xml = HF_AUDIO_AGENT_XML;
+
+        pa_assert_se(r = dbus_message_new_method_return(m));
+        pa_assert_se(dbus_message_append_args(r, DBUS_TYPE_STRING, &xml, DBUS_TYPE_INVALID));
+
+    } else if (dbus_message_is_method_call(m, HF_AUDIO_AGENT_INTERFACE, "NewConnection"))
+        r = hf_audio_agent_new_connection(c, m, data);
+    else if (dbus_message_is_method_call(m, HF_AUDIO_AGENT_INTERFACE, "Release"))
+        r = hf_audio_agent_release(c, m, data);
+    else
+        return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+
+    if (r) {
+        pa_assert_se(dbus_connection_send(pa_dbus_connection_get(backend->connection), r, NULL));
+        dbus_message_unref(r);
+    }
+
+    return DBUS_HANDLER_RESULT_HANDLED;
+}
+
+pa_bluetooth_backend *pa_bluetooth_backend_new(pa_core *c) {
+    pa_bluetooth_backend *backend;
+    DBusError err;
+    static const DBusObjectPathVTable vtable_hf_audio_agent = {
+        .message_function = hf_audio_agent_handler,
+    };
+
+    pa_assert(c);
+
+    backend = pa_xnew0(pa_bluetooth_backend, 1);
+    backend->core = c;
+
+    dbus_error_init(&err);
+
+    if (!(backend->connection = pa_dbus_bus_get(c, DBUS_BUS_SYSTEM, &err))) {
+        pa_log("Failed to get D-Bus connection: %s", err.message);
+        dbus_error_free(&err);
+        return NULL;
+    }
+
+    pa_assert_se(dbus_connection_register_object_path(pa_dbus_connection_get(backend->connection), HF_AUDIO_AGENT_PATH,
+                                                      &vtable_hf_audio_agent, backend));
+
+    return backend;
+}
+
+void pa_bluetooth_backend_free(pa_bluetooth_backend *backend) {
+    pa_assert(backend);
+
+    if (backend->connection) {
+        dbus_connection_unregister_object_path(pa_dbus_connection_get(backend->connection), HF_AUDIO_AGENT_PATH);
+
+        pa_dbus_connection_unref(backend->connection);
+    }
+
+    pa_xfree(backend);
+}