Initial file for module-bt-device

src/modules/module-bt-device.c

@@ -0,0 +1,154 @@
+/***
+    This file is part of PulseAudio.
+
+    Copyright 2008 Joao 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 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.
+
+    1. Connects to the BlueZ audio service via one BlueZ specific well known unix socket
+        bluez/audio/ipc: bt_audio_service_open()
+    2. Configures a connection to the BT device
+    3. Gets a BT socket fd passed in via the unix socket
+        bluez/audio/ipc: bt_audio_service_get_data_fd()
+    4. Hands this over to its RT thread.
+        pa_thread_mq
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <pulse/xmalloc.h>
+#include <pulsecore/module.h>
+#include <pulsecore/modargs.h>
+
+#include "dbus-util.h"
+#include "module-bt-device-symdef.h"
+#include "bt-ipc.h"
+
+PA_MODULE_AUTHOR("Joao Paulo Rechi Vita");
+PA_MODULE_DESCRIPTION("Bluetooth audio sink and source");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(FALSE);
+PA_MODULE_USAGE(
+        "addr=<address of the device> "
+        "uuid=<the profile that this device will work on>");
+
+struct userdata {
+    pa_core *core;
+    pa_module *module;
+    pa_sink *sink;
+
+    const char *addr;
+    const char *uuid;
+};
+
+static const char* const valid_modargs[] = {
+    "addr",
+    "uuid",
+    NULL
+};
+
+static int audioservice_send(int sk, const bt_audio_msg_header_t *msg) {
+    int e;
+    pa_log("sending %s", bt_audio_strmsg(msg->msg_type)); /*debug*/
+    if (send(sk, msg, BT_AUDIO_IPC_PACKET_SIZE, 0) > 0)
+        e = 0;
+    else {
+        e = -errno;
+        pa_log_error("Error sending data to audio service: %s(%d)", strerror(errno), errno);
+    }
+    return e;
+}
+
+static int audioservice_recv(int sk, bt_audio_msg_header_t *inmsg) {
+    int err;
+    const char *type;
+
+    pa_log/*_debug*/("trying to receive msg from audio service...");
+    if (recv(sk, inmsg, BT_AUDIO_IPC_PACKET_SIZE, 0) > 0) {
+        type = bt_audio_strmsg(inmsg->msg_type);
+        if (type) {
+            pa_log/*_debug*/("Received %s", type);
+            err = 0;
+        }
+        else {
+            err = -EINVAL;
+            pa_log_error("Bogus message type %d received from audio service", inmsg->msg_type);
+        }
+    }
+    else {
+        err = -errno;
+        pa_log_error("Error receiving data from audio service: %s(%d)", strerror(errno), errno);
+    }
+
+    return err;
+}
+
+static int audioservice_expect(int sk, bt_audio_msg_header_t *rsp_hdr, int expected_type) {
+    int err = audioservice_recv(sk, rsp_hdr);
+    if (err == 0) {
+        if (rsp_hdr->msg_type != expected_type) {
+            err = -EINVAL;
+            pa_log_error("Bogus message %s received while %s was expected", bt_audio_strmsg(rsp_hdr->msg_type),
+                    bt_audio_strmsg(expected_type));
+        }
+    }
+    return err;
+}
+
+int pa__init(pa_module* m) {
+    pa_modargs *ma;
+    struct userdata *u;
+    int sk = -1;
+
+    pa_assert(m);
+    m->userdata = u = pa_xnew0(struct userdata, 1);
+    u->module = m;
+
+    if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+        pa_log_error("failed to parse module arguments");
+        goto fail;
+    }
+    if (!(u->addr = pa_modargs_get_value(ma, "addr", NULL))) {
+        pa_log_error("failed to parse device address from module arguments");
+        goto fail;
+    }
+    if (!(u->uuid = pa_modargs_get_value(ma, "uuid", NULL))) {
+        pa_log_error("failed to parse device uuid from module arguments");
+        goto fail;
+    }
+    pa_log("Loading module-bt-device for %s, UUID=%s", u->addr, u->uuid);
+
+    /* Connects to the BlueZ audio service via one BlueZ specific well known unix socket */
+    sk = bt_audio_service_open();
+    if (sk <= 0) {
+        pa_log_error("couldn't connect to bluetooth audio service");
+        goto fail;
+    }
+    pa_log("socket to audio service: %d", sk); /*debug*/
+
+    return 0;
+
+fail:
+    pa__done(m);
+    return -1;
+}
+
+void pa__done(pa_module *m) {
+    pa_log("Unloading module-bt-device");
+}
+