diff options
Diffstat (limited to 'audio/source.c')
| -rw-r--r-- | audio/source.c | 633 |
1 files changed, 633 insertions, 0 deletions
diff --git a/audio/source.c b/audio/source.c new file mode 100644 index 0000000..6d266f2 --- /dev/null +++ b/audio/source.c @@ -0,0 +1,633 @@ +/* + * + * BlueZ - Bluetooth protocol stack for Linux + * + * Copyright (C) 2006-2010 Nokia Corporation + * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org> + * Copyright (C) 2009 Joao Paulo Rechi Vita + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 <stdint.h> +#include <errno.h> + +#include <bluetooth/bluetooth.h> +#include <bluetooth/sdp.h> + +#include <glib.h> +#include <dbus/dbus.h> +#include <gdbus.h> + +#include "log.h" + +#include "device.h" +#include "avdtp.h" +#include "media.h" +#include "a2dp.h" +#include "error.h" +#include "source.h" +#include "dbus-common.h" +#include "../src/adapter.h" +#include "../src/device.h" + +#define STREAM_SETUP_RETRY_TIMER 2 + +struct pending_request { + DBusConnection *conn; + DBusMessage *msg; + unsigned int id; +}; + +struct source { + struct audio_device *dev; + struct avdtp *session; + struct avdtp_stream *stream; + unsigned int cb_id; + guint retry_id; + avdtp_session_state_t session_state; + avdtp_state_t stream_state; + source_state_t state; + struct pending_request *connect; + struct pending_request *disconnect; + DBusConnection *conn; +}; + +struct source_state_callback { + source_state_cb cb; + void *user_data; + unsigned int id; +}; + +static GSList *source_callbacks = NULL; + +static unsigned int avdtp_callback_id = 0; + +static const char *state2str(source_state_t state) +{ + switch (state) { + case SOURCE_STATE_DISCONNECTED: + return "disconnected"; + case SOURCE_STATE_CONNECTING: + return "connecting"; + case SOURCE_STATE_CONNECTED: + return "connected"; + case SOURCE_STATE_PLAYING: + return "playing"; + default: + error("Invalid source state %d", state); + return NULL; + } +} + +static void source_set_state(struct audio_device *dev, source_state_t new_state) +{ + struct source *source = dev->source; + const char *state_str; + source_state_t old_state = source->state; + GSList *l; + + source->state = new_state; + + state_str = state2str(new_state); + if (state_str) + emit_property_changed(dev->conn, dev->path, + AUDIO_SOURCE_INTERFACE, "State", + DBUS_TYPE_STRING, &state_str); + + for (l = source_callbacks; l != NULL; l = l->next) { + struct source_state_callback *cb = l->data; + cb->cb(dev, old_state, new_state, cb->user_data); + } +} + +static void avdtp_state_callback(struct audio_device *dev, + struct avdtp *session, + avdtp_session_state_t old_state, + avdtp_session_state_t new_state, + void *user_data) +{ + struct source *source = dev->source; + + if (source == NULL) + return; + + switch (new_state) { + case AVDTP_SESSION_STATE_DISCONNECTED: + source_set_state(dev, SOURCE_STATE_DISCONNECTED); + break; + case AVDTP_SESSION_STATE_CONNECTING: + source_set_state(dev, SOURCE_STATE_CONNECTING); + break; + case AVDTP_SESSION_STATE_CONNECTED: + break; + } + + source->session_state = new_state; +} + +static void pending_request_free(struct audio_device *dev, + struct pending_request *pending) +{ + if (pending->conn) + dbus_connection_unref(pending->conn); + if (pending->msg) + dbus_message_unref(pending->msg); + if (pending->id) + a2dp_cancel(dev, pending->id); + + g_free(pending); +} + +static void stream_state_changed(struct avdtp_stream *stream, + avdtp_state_t old_state, + avdtp_state_t new_state, + struct avdtp_error *err, + void *user_data) +{ + struct audio_device *dev = user_data; + struct source *source = dev->source; + + if (err) + return; + + switch (new_state) { + case AVDTP_STATE_IDLE: + if (source->disconnect) { + DBusMessage *reply; + struct pending_request *p; + + p = source->disconnect; + source->disconnect = NULL; + + reply = dbus_message_new_method_return(p->msg); + g_dbus_send_message(p->conn, reply); + pending_request_free(dev, p); + } + + if (source->session) { + avdtp_unref(source->session); + source->session = NULL; + } + source->stream = NULL; + source->cb_id = 0; + break; + case AVDTP_STATE_OPEN: + source_set_state(dev, SOURCE_STATE_CONNECTED); + break; + case AVDTP_STATE_STREAMING: + source_set_state(dev, SOURCE_STATE_PLAYING); + break; + case AVDTP_STATE_CONFIGURED: + case AVDTP_STATE_CLOSING: + case AVDTP_STATE_ABORTING: + default: + break; + } + + source->stream_state = new_state; +} + +static void error_failed(DBusConnection *conn, DBusMessage *msg, + const char *desc) +{ + DBusMessage *reply = btd_error_failed(msg, desc); + g_dbus_send_message(conn, reply); +} + +static gboolean stream_setup_retry(gpointer user_data) +{ + struct source *source = user_data; + struct pending_request *pending = source->connect; + + source->retry_id = 0; + + if (source->stream_state >= AVDTP_STATE_OPEN) { + DBG("Stream successfully created, after XCASE connect:connect"); + if (pending->msg) { + DBusMessage *reply; + reply = dbus_message_new_method_return(pending->msg); + g_dbus_send_message(pending->conn, reply); + } + } else { + DBG("Stream setup failed, after XCASE connect:connect"); + if (pending->msg) + error_failed(pending->conn, pending->msg, "Stream setup failed"); + } + + source->connect = NULL; + pending_request_free(source->dev, pending); + + return FALSE; +} + +static void stream_setup_complete(struct avdtp *session, struct a2dp_sep *sep, + struct avdtp_stream *stream, + struct avdtp_error *err, void *user_data) +{ + struct source *source = user_data; + struct pending_request *pending; + + pending = source->connect; + + pending->id = 0; + + if (stream) { + DBG("Stream successfully created"); + + if (pending->msg) { + DBusMessage *reply; + reply = dbus_message_new_method_return(pending->msg); + g_dbus_send_message(pending->conn, reply); + } + + source->connect = NULL; + pending_request_free(source->dev, pending); + + return; + } + + avdtp_unref(source->session); + source->session = NULL; + if (avdtp_error_category(err) == AVDTP_ERRNO + && avdtp_error_posix_errno(err) != EHOSTDOWN) { + DBG("connect:connect XCASE detected"); + source->retry_id = g_timeout_add_seconds(STREAM_SETUP_RETRY_TIMER, + stream_setup_retry, + source); + } else { + if (pending->msg) + error_failed(pending->conn, pending->msg, "Stream setup failed"); + source->connect = NULL; + pending_request_free(source->dev, pending); + DBG("Stream setup failed : %s", avdtp_strerror(err)); + } +} + +static void select_complete(struct avdtp *session, struct a2dp_sep *sep, + GSList *caps, void *user_data) +{ + struct source *source = user_data; + struct pending_request *pending; + int id; + + pending = source->connect; + + pending->id = 0; + + if (caps == NULL) + goto failed; + + id = a2dp_config(session, sep, stream_setup_complete, caps, source); + if (id == 0) + goto failed; + + pending->id = id; + return; + +failed: + if (pending->msg) + error_failed(pending->conn, pending->msg, "Stream setup failed"); + pending_request_free(source->dev, pending); + source->connect = NULL; + avdtp_unref(source->session); + source->session = NULL; +} + +static void discovery_complete(struct avdtp *session, GSList *seps, struct avdtp_error *err, + void *user_data) +{ + struct source *source = user_data; + struct pending_request *pending; + int id; + + pending = source->connect; + + if (err) { + avdtp_unref(source->session); + source->session = NULL; + if (avdtp_error_category(err) == AVDTP_ERRNO + && avdtp_error_posix_errno(err) != EHOSTDOWN) { + DBG("connect:connect XCASE detected"); + source->retry_id = + g_timeout_add_seconds(STREAM_SETUP_RETRY_TIMER, + stream_setup_retry, + source); + } else + goto failed; + return; + } + + DBG("Discovery complete"); + + id = a2dp_select_capabilities(source->session, AVDTP_SEP_TYPE_SOURCE, NULL, + select_complete, source); + if (id == 0) + goto failed; + + pending->id = id; + return; + +failed: + if (pending->msg) + error_failed(pending->conn, pending->msg, "Stream setup failed"); + pending_request_free(source->dev, pending); + source->connect = NULL; + avdtp_unref(source->session); + source->session = NULL; +} + +gboolean source_setup_stream(struct source *source, struct avdtp *session) +{ + if (source->connect || source->disconnect) + return FALSE; + + if (session && !source->session) + source->session = avdtp_ref(session); + + if (!source->session) + return FALSE; + + avdtp_set_auto_disconnect(source->session, FALSE); + + if (avdtp_discover(source->session, discovery_complete, source) < 0) + return FALSE; + + source->connect = g_new0(struct pending_request, 1); + + return TRUE; +} + +static DBusMessage *source_connect(DBusConnection *conn, + DBusMessage *msg, void *data) +{ + struct audio_device *dev = data; + struct source *source = dev->source; + struct pending_request *pending; + + if (!source->session) + source->session = avdtp_get(&dev->src, &dev->dst); + + if (!source->session) + return btd_error_failed(msg, "Unable to get a session"); + + if (source->connect || source->disconnect) + return btd_error_busy(msg); + + if (source->stream_state >= AVDTP_STATE_OPEN) + return btd_error_already_connected(msg); + + if (!source_setup_stream(source, NULL)) + return btd_error_failed(msg, "Failed to create a stream"); + + dev->auto_connect = FALSE; + + pending = source->connect; + + pending->conn = dbus_connection_ref(conn); + pending->msg = dbus_message_ref(msg); + + DBG("stream creation in progress"); + + return NULL; +} + +static DBusMessage *source_disconnect(DBusConnection *conn, + DBusMessage *msg, void *data) +{ + struct audio_device *device = data; + struct source *source = device->source; + struct pending_request *pending; + int err; + + if (!source->session) + return btd_error_not_connected(msg); + + if (source->connect || source->disconnect) + return btd_error_busy(msg); + + if (source->stream_state < AVDTP_STATE_OPEN) { + DBusMessage *reply = dbus_message_new_method_return(msg); + if (!reply) + return NULL; + avdtp_unref(source->session); + source->session = NULL; + return reply; + } + + err = avdtp_close(source->session, source->stream, FALSE); + if (err < 0) + return btd_error_failed(msg, strerror(-err)); + + pending = g_new0(struct pending_request, 1); + pending->conn = dbus_connection_ref(conn); + pending->msg = dbus_message_ref(msg); + source->disconnect = pending; + + return NULL; +} + +static DBusMessage *source_get_properties(DBusConnection *conn, + DBusMessage *msg, void *data) +{ + struct audio_device *device = data; + struct source *source = device->source; + DBusMessage *reply; + DBusMessageIter iter; + DBusMessageIter dict; + const char *state; + + reply = dbus_message_new_method_return(msg); + if (!reply) + return NULL; + + dbus_message_iter_init_append(reply, &iter); + + dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, + DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING + DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING + DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict); + + /* State */ + state = state2str(source->state); + if (state) + dict_append_entry(&dict, "State", DBUS_TYPE_STRING, &state); + + dbus_message_iter_close_container(&iter, &dict); + + return reply; +} + +static GDBusMethodTable source_methods[] = { + { "Connect", "", "", source_connect, + G_DBUS_METHOD_FLAG_ASYNC }, + { "Disconnect", "", "", source_disconnect, + G_DBUS_METHOD_FLAG_ASYNC }, + { "GetProperties", "", "a{sv}",source_get_properties }, + { NULL, NULL, NULL, NULL } +}; + +static GDBusSignalTable source_signals[] = { + { "PropertyChanged", "sv" }, + { NULL, NULL } +}; + +static void source_free(struct audio_device *dev) +{ + struct source *source = dev->source; + + if (source->cb_id) + avdtp_stream_remove_cb(source->session, source->stream, + source->cb_id); + + if (source->session) + avdtp_unref(source->session); + + if (source->connect) + pending_request_free(dev, source->connect); + + if (source->disconnect) + pending_request_free(dev, source->disconnect); + + if (source->retry_id) + g_source_remove(source->retry_id); + + g_free(source); + dev->source = NULL; +} + +static void path_unregister(void *data) +{ + struct audio_device *dev = data; + + DBG("Unregistered interface %s on path %s", + AUDIO_SOURCE_INTERFACE, dev->path); + + source_free(dev); +} + +void source_unregister(struct audio_device *dev) +{ + g_dbus_unregister_interface(dev->conn, dev->path, + AUDIO_SOURCE_INTERFACE); +} + +struct source *source_init(struct audio_device *dev) +{ + struct source *source; + + if (!g_dbus_register_interface(dev->conn, dev->path, + AUDIO_SOURCE_INTERFACE, + source_methods, source_signals, NULL, + dev, path_unregister)) + return NULL; + + DBG("Registered interface %s on path %s", + AUDIO_SOURCE_INTERFACE, dev->path); + + if (avdtp_callback_id == 0) + avdtp_callback_id = avdtp_add_state_cb(avdtp_state_callback, + NULL); + + source = g_new0(struct source, 1); + + source->dev = dev; + + return source; +} + +gboolean source_is_active(struct audio_device *dev) +{ + struct source *source = dev->source; + + if (source->session) + return TRUE; + + return FALSE; +} + +avdtp_state_t source_get_state(struct audio_device *dev) +{ + struct source *source = dev->source; + + return source->stream_state; +} + +gboolean source_new_stream(struct audio_device *dev, struct avdtp *session, + struct avdtp_stream *stream) +{ + struct source *source = dev->source; + + if (source->stream) + return FALSE; + + if (!source->session) + source->session = avdtp_ref(session); + + source->stream = stream; + + source->cb_id = avdtp_stream_add_cb(session, stream, + stream_state_changed, dev); + + return TRUE; +} + +gboolean source_shutdown(struct source *source) +{ + if (!source->stream) + return FALSE; + + if (avdtp_close(source->session, source->stream, FALSE) < 0) + return FALSE; + + return TRUE; +} + +unsigned int source_add_state_cb(source_state_cb cb, void *user_data) +{ + struct source_state_callback *state_cb; + static unsigned int id = 0; + + state_cb = g_new(struct source_state_callback, 1); + state_cb->cb = cb; + state_cb->user_data = user_data; + state_cb->id = ++id; + + source_callbacks = g_slist_append(source_callbacks, state_cb); + + return state_cb->id; +} + +gboolean source_remove_state_cb(unsigned int id) +{ + GSList *l; + + for (l = source_callbacks; l != NULL; l = l->next) { + struct source_state_callback *cb = l->data; + if (cb && cb->id == id) { + source_callbacks = g_slist_remove(source_callbacks, cb); + g_free(cb); + return TRUE; + } + } + + return FALSE; +} |