This code can register an handsfree audio agent and receive NewConnection and Release calls. --- tools/handsfree-audio.c | 332 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 332 insertions(+) create mode 100644 tools/handsfree-audio.c diff --git a/tools/handsfree-audio.c b/tools/handsfree-audio.c new file mode 100644 index 0000000..88310aa --- /dev/null +++ b/tools/handsfree-audio.c @@ -0,0 +1,332 @@ +/* + * + * oFono - Open Source Telephony + * + * Copyright (C) 2013 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program 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 General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <errno.h> +#include <fcntl.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <signal.h> + +#include <gdbus.h> +#include <glib.h> + +#define OFONO_SERVICE "org.ofono" +#define HFP_AUDIO_MANAGER_PATH "/" +#define HFP_AUDIO_MANAGER_INTERFACE OFONO_SERVICE ".HandsfreeAudioManager" +#define HFP_AUDIO_AGENT_PATH "/hfpaudioagent" +#define HFP_AUDIO_AGENT_INTERFACE OFONO_SERVICE ".HandsfreeAudioAgent" + +#define HFP_AUDIO_CVSD 1 +#define HFP_AUDIO_MSBC 2 + +#define DBG(fmt, arg...) do {\ + g_print("%s: " fmt "\n", __FUNCTION__, ## arg);\ + } while (0) + +/* DBus related */ +static GMainLoop *main_loop = NULL; +static DBusConnection *conn; +static GSList *hcons = NULL; + +static gboolean option_nocvsd = FALSE; +static gboolean option_nomsbc = FALSE; + +struct hfp_audio_conn { + unsigned char codec; + int watch; +}; + +static void hfp_audio_conn_free(struct hfp_audio_conn *hcon) +{ + DBG("Freeing audio connection %p", hcon); + + hcons = g_slist_remove(hcons, hcon); + g_source_remove(hcon->watch); + g_free(hcon); +} + +static gboolean hfp_audio_cb(GIOChannel *io, GIOCondition cond, gpointer data) +{ + struct hfp_audio_conn *hcon = data; + gsize read; + gsize written; + char buf[60]; + + if (cond & (G_IO_HUP | G_IO_NVAL | G_IO_ERR)) + goto fail; + + if (g_io_channel_read_chars(io, buf, sizeof(buf), &read, NULL) != + G_IO_STATUS_NORMAL) + goto fail; + + g_io_channel_write_chars(io, buf+written, read, &written, NULL); + + return TRUE; + +fail: + DBG("Disconnected"); + hfp_audio_conn_free(hcon); + return FALSE; +} + +static DBusMessage *agent_newconnection(DBusConnection *conn, DBusMessage *msg, + void *data) +{ + const char *card; + int fd; + unsigned char codec; + GIOChannel *io; + struct hfp_audio_conn *hcon; + + DBG("New connection"); + + if (dbus_message_get_args(msg, NULL, DBUS_TYPE_OBJECT_PATH, &card, + DBUS_TYPE_UNIX_FD, &fd, + DBUS_TYPE_BYTE, &codec, + DBUS_TYPE_INVALID) == FALSE) + return g_dbus_create_error(msg, + HFP_AUDIO_AGENT_INTERFACE ".InvalidArguments", + "Invalid arguments"); + + DBG("New connection: card=%s fd=%d codec=%d", card, fd, codec); + + io = g_io_channel_unix_new(fd); + + hcon = g_try_malloc0(sizeof(struct hfp_audio_conn)); + if (hcon == NULL) + return NULL; + + hcon->codec = codec; + hcon->watch = g_io_add_watch(io, G_IO_IN, hfp_audio_cb, hcon); + hcons = g_slist_prepend(hcons, hcon); + + return dbus_message_new_method_return(msg); +} + +static DBusMessage *agent_release(DBusConnection *conn, DBusMessage *msg, + void *data) +{ + DBG("HFP audio agent released"); + return dbus_message_new_method_return(msg); +} + +static const GDBusMethodTable agent_methods[] = { + { GDBUS_METHOD("NewConnection", NULL, NULL, agent_newconnection) }, + { GDBUS_METHOD("Release", NULL, NULL, agent_release) }, + { }, +}; + +static void hfp_audio_agent_register_reply(DBusPendingCall *call, void *data) +{ + DBusMessage *reply = dbus_pending_call_steal_reply(call); + DBusError err; + + dbus_error_init(&err); + + if (dbus_set_error_from_message(&err, reply) == TRUE) { + DBG("Failed to register audio agent (%s: %s)", err.name, + err.message); + dbus_error_free(&err); + } else { + DBG("HFP audio agent registered"); + } + + dbus_message_unref(reply); +} + +static void hfp_audio_agent_register(DBusConnection *conn) +{ + DBusMessage *msg; + DBusPendingCall *call; + const char *path = HFP_AUDIO_AGENT_PATH; + unsigned char codecs[2]; + const unsigned char *pcodecs = codecs; + int ncodecs = 0; + + DBG("Registering audio agent"); + + msg = dbus_message_new_method_call(OFONO_SERVICE, + HFP_AUDIO_MANAGER_PATH, + HFP_AUDIO_MANAGER_INTERFACE, + "Register"); + if (msg == NULL) { + DBG("Not enough memory"); + return; + } + + if (option_nocvsd == FALSE) + codecs[ncodecs++] = HFP_AUDIO_CVSD; + + if (option_nomsbc == FALSE) + codecs[ncodecs++] = HFP_AUDIO_MSBC; + + dbus_message_append_args(msg, DBUS_TYPE_OBJECT_PATH, &path, + DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE, + &pcodecs, ncodecs, DBUS_TYPE_INVALID); + + if (!dbus_connection_send_with_reply(conn, msg, &call, -1)) { + dbus_message_unref(msg); + DBG("Unable to register agent"); + return; + } + + dbus_message_unref(msg); + + if (call == NULL) { + DBG("Unable to register agent"); + return; + } + + dbus_pending_call_set_notify(call, hfp_audio_agent_register_reply, + NULL, NULL); + + dbus_pending_call_unref(call); +} + +static void hfp_audio_agent_create(DBusConnection *conn) +{ + DBG("Creating audio agent"); + + if (!g_dbus_register_interface(conn, HFP_AUDIO_AGENT_PATH, + HFP_AUDIO_AGENT_INTERFACE, + agent_methods, NULL, NULL, + NULL, NULL)) { + DBG("Unable to create local agent"); + g_main_loop_quit(main_loop); + } +} + +static void hfp_audio_agent_destroy(DBusConnection *conn) +{ + DBG("Destroying audio agent"); + + g_dbus_unregister_interface(conn, HFP_AUDIO_AGENT_PATH, + HFP_AUDIO_AGENT_INTERFACE); +} + +static void ofono_connect(DBusConnection *conn, void *user_data) +{ + DBG("oFono appeared"); + + hfp_audio_agent_register(conn); +} + +static void ofono_disconnect(DBusConnection *conn, void *user_data) +{ + DBG("oFono disappeared"); +} + +static void disconnect_callback(DBusConnection *conn, void *user_data) +{ + DBG("Disconnected from BUS"); + + g_main_loop_quit(main_loop); +} + +static void sig_term(int sig) +{ + DBG("Terminating"); + + g_main_loop_quit(main_loop); +} + +static GOptionEntry options[] = { + { "nocvsd", 'c', 0, G_OPTION_ARG_NONE, &option_nocvsd, + "Disable CVSD support" }, + { "nomsbc", 'm', 0, G_OPTION_ARG_NONE, &option_nomsbc, + "Disable MSBC support" }, + { NULL }, +}; + +int main(int argc, char **argv) +{ + GOptionContext *context; + GError *error = NULL; + DBusError err; + guint watch; + struct sigaction sa; + + context = g_option_context_new(NULL); + g_option_context_add_main_entries(context, options, NULL); + + if (g_option_context_parse(context, &argc, &argv, &error) == FALSE) { + if (error != NULL) { + DBG("%s", error->message); + g_error_free(error); + } else + DBG("An unknown error occurred"); + exit(1); + } + + g_option_context_free(context); + + if (option_nocvsd == TRUE && option_nomsbc == TRUE) { + DBG("At least one codec must be supported"); + exit(2); + } + + main_loop = g_main_loop_new(NULL, FALSE); + + dbus_error_init(&err); + + conn = g_dbus_setup_bus(DBUS_BUS_SYSTEM, NULL, &err); + if (conn == NULL) { + if (dbus_error_is_set(&err) == TRUE) { + DBG("%s", err.message); + dbus_error_free(&err); + } else + DBG("Can't register with system bus"); + exit(1); + } + + g_dbus_set_disconnect_function(conn, disconnect_callback, NULL, NULL); + + memset(&sa, 0, sizeof(sa)); + sa.sa_handler = sig_term; + sigaction(SIGINT, &sa, NULL); + sigaction(SIGTERM, &sa, NULL); + + hfp_audio_agent_create(conn); + + watch = g_dbus_add_service_watch(conn, OFONO_SERVICE, + ofono_connect, ofono_disconnect, NULL, NULL); + + g_main_loop_run(main_loop); + + g_dbus_remove_watch(conn, watch); + + while (hcons != NULL) + hfp_audio_conn_free(hcons->data); + + hfp_audio_agent_destroy(conn); + + dbus_connection_unref(conn); + + g_main_loop_unref(main_loop); + + return 0; +} -- 1.7.9.5